key.c revision 1.171
1 /* $NetBSD: key.c,v 1.171 2017/07/10 07:45:10 ozaki-r Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms Exp $ */ 3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.171 2017/07/10 07:45:10 ozaki-r Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #if defined(_KERNEL_OPT) 42 #include "opt_inet.h" 43 #include "opt_ipsec.h" 44 #include "opt_gateway.h" 45 #endif 46 47 #include <sys/types.h> 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/callout.h> 51 #include <sys/kernel.h> 52 #include <sys/mbuf.h> 53 #include <sys/domain.h> 54 #include <sys/socket.h> 55 #include <sys/socketvar.h> 56 #include <sys/sysctl.h> 57 #include <sys/errno.h> 58 #include <sys/proc.h> 59 #include <sys/queue.h> 60 #include <sys/syslog.h> 61 #include <sys/once.h> 62 #include <sys/cprng.h> 63 #include <sys/psref.h> 64 #include <sys/lwp.h> 65 #include <sys/workqueue.h> 66 #include <sys/kmem.h> 67 #include <sys/cpu.h> 68 #include <sys/atomic.h> 69 70 #include <net/if.h> 71 #include <net/route.h> 72 73 #include <netinet/in.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/ip.h> 76 #include <netinet/in_var.h> 77 #ifdef INET 78 #include <netinet/ip_var.h> 79 #endif 80 81 #ifdef INET6 82 #include <netinet/ip6.h> 83 #include <netinet6/in6_var.h> 84 #include <netinet6/ip6_var.h> 85 #endif /* INET6 */ 86 87 #ifdef INET 88 #include <netinet/in_pcb.h> 89 #endif 90 #ifdef INET6 91 #include <netinet6/in6_pcb.h> 92 #endif /* INET6 */ 93 94 #include <net/pfkeyv2.h> 95 #include <netipsec/keydb.h> 96 #include <netipsec/key.h> 97 #include <netipsec/keysock.h> 98 #include <netipsec/key_debug.h> 99 100 #include <netipsec/ipsec.h> 101 #ifdef INET6 102 #include <netipsec/ipsec6.h> 103 #endif 104 #include <netipsec/ipsec_private.h> 105 106 #include <netipsec/xform.h> 107 #include <netipsec/ipcomp.h> 108 109 110 #include <net/net_osdep.h> 111 112 #define FULLMASK 0xff 113 #define _BITS(bytes) ((bytes) << 3) 114 115 #define PORT_NONE 0 116 #define PORT_LOOSE 1 117 #define PORT_STRICT 2 118 119 percpu_t *pfkeystat_percpu; 120 121 /* 122 * Note on SA reference counting: 123 * - SAs that are not in DEAD state will have (total external reference + 1) 124 * following value in reference count field. they cannot be freed and are 125 * referenced from SA header. 126 * - SAs that are in DEAD state will have (total external reference) 127 * in reference count field. they are ready to be freed. reference from 128 * SA header will be removed in key_delsav(), when the reference count 129 * field hits 0 (= no external reference other than from SA header. 130 */ 131 132 u_int32_t key_debug_level = 0; 133 static u_int key_spi_trycnt = 1000; 134 static u_int32_t key_spi_minval = 0x100; 135 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 136 static u_int32_t policy_id = 0; 137 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 138 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 139 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 140 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 141 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 142 143 static u_int32_t acq_seq = 0; 144 145 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 146 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 147 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 148 /* registed list */ 149 #ifndef IPSEC_NONBLOCK_ACQUIRE 150 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 151 #endif 152 #ifdef notyet 153 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 154 #endif 155 156 /* 157 * Protect regtree, acqtree and items stored in the lists. 158 */ 159 static kmutex_t key_mtx __cacheline_aligned; 160 161 /* search order for SAs */ 162 /* 163 * This order is important because we must select the oldest SA 164 * for outbound processing. For inbound, This is not important. 165 */ 166 static const u_int saorder_state_valid_prefer_old[] = { 167 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 168 }; 169 static const u_int saorder_state_valid_prefer_new[] = { 170 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 171 }; 172 173 static const u_int saorder_state_alive[] = { 174 /* except DEAD */ 175 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 176 }; 177 static const u_int saorder_state_any[] = { 178 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 179 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 180 }; 181 182 #define SASTATE_ALIVE_FOREACH(s) \ 183 for (int _i = 0; \ 184 _i < __arraycount(saorder_state_alive) ? \ 185 (s) = saorder_state_alive[_i], true : false; \ 186 _i++) 187 #define SASTATE_ANY_FOREACH(s) \ 188 for (int _i = 0; \ 189 _i < __arraycount(saorder_state_any) ? \ 190 (s) = saorder_state_any[_i], true : false; \ 191 _i++) 192 193 static const int minsize[] = { 194 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 195 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 196 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 197 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 198 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 199 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 200 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 201 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 202 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 203 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 204 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 205 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 206 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 207 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 208 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 209 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 210 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 211 0, /* SADB_X_EXT_KMPRIVATE */ 212 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 213 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 214 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 215 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 216 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 217 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 218 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 219 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 220 }; 221 static const int maxsize[] = { 222 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 223 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 224 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 225 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 226 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 227 0, /* SADB_EXT_ADDRESS_SRC */ 228 0, /* SADB_EXT_ADDRESS_DST */ 229 0, /* SADB_EXT_ADDRESS_PROXY */ 230 0, /* SADB_EXT_KEY_AUTH */ 231 0, /* SADB_EXT_KEY_ENCRYPT */ 232 0, /* SADB_EXT_IDENTITY_SRC */ 233 0, /* SADB_EXT_IDENTITY_DST */ 234 0, /* SADB_EXT_SENSITIVITY */ 235 0, /* SADB_EXT_PROPOSAL */ 236 0, /* SADB_EXT_SUPPORTED_AUTH */ 237 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 238 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 239 0, /* SADB_X_EXT_KMPRIVATE */ 240 0, /* SADB_X_EXT_POLICY */ 241 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 242 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 243 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 244 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 245 0, /* SADB_X_EXT_NAT_T_OAI */ 246 0, /* SADB_X_EXT_NAT_T_OAR */ 247 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 248 }; 249 250 static int ipsec_esp_keymin = 256; 251 static int ipsec_esp_auth = 0; 252 static int ipsec_ah_keymin = 128; 253 254 #ifdef SYSCTL_DECL 255 SYSCTL_DECL(_net_key); 256 #endif 257 258 #ifdef SYSCTL_INT 259 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 260 &key_debug_level, 0, ""); 261 262 /* max count of trial for the decision of spi value */ 263 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 264 &key_spi_trycnt, 0, ""); 265 266 /* minimum spi value to allocate automatically. */ 267 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 268 &key_spi_minval, 0, ""); 269 270 /* maximun spi value to allocate automatically. */ 271 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 272 &key_spi_maxval, 0, ""); 273 274 /* interval to initialize randseed */ 275 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 276 &key_int_random, 0, ""); 277 278 /* lifetime for larval SA */ 279 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 280 &key_larval_lifetime, 0, ""); 281 282 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 283 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 284 &key_blockacq_count, 0, ""); 285 286 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 287 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 288 &key_blockacq_lifetime, 0, ""); 289 290 /* ESP auth */ 291 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 292 &ipsec_esp_auth, 0, ""); 293 294 /* minimum ESP key length */ 295 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 296 &ipsec_esp_keymin, 0, ""); 297 298 /* minimum AH key length */ 299 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 300 &ipsec_ah_keymin, 0, ""); 301 302 /* perfered old SA rather than new SA */ 303 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 304 &key_prefered_oldsa, 0, ""); 305 #endif /* SYSCTL_INT */ 306 307 #define __LIST_CHAINED(elm) \ 308 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 309 #define LIST_INSERT_TAIL(head, elm, type, field) \ 310 do {\ 311 struct type *curelm = LIST_FIRST(head); \ 312 if (curelm == NULL) {\ 313 LIST_INSERT_HEAD(head, elm, field); \ 314 } else { \ 315 while (LIST_NEXT(curelm, field)) \ 316 curelm = LIST_NEXT(curelm, field);\ 317 LIST_INSERT_AFTER(curelm, elm, field);\ 318 }\ 319 } while (0) 320 321 #define KEY_CHKSASTATE(head, sav) \ 322 /* do */ { \ 323 if ((head) != (sav)) { \ 324 IPSECLOG(LOG_DEBUG, \ 325 "state mismatched (TREE=%d SA=%d)\n", \ 326 (head), (sav)); \ 327 continue; \ 328 } \ 329 } /* while (0) */ 330 331 #define KEY_CHKSPDIR(head, sp) \ 332 do { \ 333 if ((head) != (sp)) { \ 334 IPSECLOG(LOG_DEBUG, \ 335 "direction mismatched (TREE=%d SP=%d), anyway continue.\n",\ 336 (head), (sp)); \ 337 } \ 338 } while (0) 339 340 /* 341 * set parameters into secasindex buffer. 342 * Must allocate secasindex buffer before calling this function. 343 */ 344 static int 345 key_setsecasidx(int, int, int, const struct sockaddr *, 346 const struct sockaddr *, struct secasindex *); 347 348 /* key statistics */ 349 struct _keystat { 350 u_long getspi_count; /* the avarage of count to try to get new SPI */ 351 } keystat; 352 353 struct sadb_msghdr { 354 struct sadb_msg *msg; 355 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 356 int extoff[SADB_EXT_MAX + 1]; 357 int extlen[SADB_EXT_MAX + 1]; 358 }; 359 360 static void 361 key_init_spidx_bymsghdr(struct secpolicyindex *, const struct sadb_msghdr *); 362 363 static const struct sockaddr * 364 key_msghdr_get_sockaddr(const struct sadb_msghdr *mhp, int idx) 365 { 366 367 return PFKEY_ADDR_SADDR((struct sadb_address *)mhp->ext[idx]); 368 } 369 370 static struct mbuf * 371 key_fill_replymsg(struct mbuf *m, int seq) 372 { 373 struct sadb_msg *msg; 374 375 if (m->m_len < sizeof(*msg)) { 376 m = m_pullup(m, sizeof(*msg)); 377 if (m == NULL) 378 return NULL; 379 } 380 msg = mtod(m, struct sadb_msg *); 381 msg->sadb_msg_errno = 0; 382 msg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 383 if (seq != 0) 384 msg->sadb_msg_seq = seq; 385 386 return m; 387 } 388 389 static struct secasvar *key_allocsa_policy (const struct secasindex *); 390 #if 0 391 static void key_freeso(struct socket *); 392 static void key_freesp_so(struct secpolicy **); 393 #endif 394 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 395 static void key_delsp (struct secpolicy *); 396 static struct secpolicy *key_getsp (const struct secpolicyindex *); 397 static struct secpolicy *key_getspbyid (u_int32_t); 398 static u_int16_t key_newreqid (void); 399 static struct mbuf *key_gather_mbuf (struct mbuf *, 400 const struct sadb_msghdr *, int, int, ...); 401 static int key_api_spdadd(struct socket *, struct mbuf *, 402 const struct sadb_msghdr *); 403 static u_int32_t key_getnewspid (void); 404 static int key_api_spddelete(struct socket *, struct mbuf *, 405 const struct sadb_msghdr *); 406 static int key_api_spddelete2(struct socket *, struct mbuf *, 407 const struct sadb_msghdr *); 408 static int key_api_spdget(struct socket *, struct mbuf *, 409 const struct sadb_msghdr *); 410 static int key_api_spdflush(struct socket *, struct mbuf *, 411 const struct sadb_msghdr *); 412 static int key_api_spddump(struct socket *, struct mbuf *, 413 const struct sadb_msghdr *); 414 static struct mbuf * key_setspddump (int *errorp, pid_t); 415 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 416 static int key_api_nat_map(struct socket *, struct mbuf *, 417 const struct sadb_msghdr *); 418 static struct mbuf *key_setdumpsp (struct secpolicy *, 419 u_int8_t, u_int32_t, pid_t); 420 static u_int key_getspreqmsglen (const struct secpolicy *); 421 static int key_spdexpire (struct secpolicy *); 422 static struct secashead *key_newsah (const struct secasindex *); 423 static void key_delsah (struct secashead *); 424 static struct secasvar *key_newsav(struct mbuf *, 425 const struct sadb_msghdr *, int *, const char*, int); 426 #define KEY_NEWSAV(m, sadb, e) \ 427 key_newsav(m, sadb, e, __func__, __LINE__) 428 static void key_delsav (struct secasvar *); 429 static struct secashead *key_getsah(const struct secasindex *, int); 430 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 431 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 432 static int key_setsaval (struct secasvar *, struct mbuf *, 433 const struct sadb_msghdr *); 434 static void key_freesaval(struct secasvar *); 435 static int key_init_xform(struct secasvar *); 436 static void key_clear_xform(struct secasvar *); 437 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 438 u_int8_t, u_int32_t, u_int32_t); 439 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 440 static struct mbuf *key_setsadbxtype (u_int16_t); 441 static struct mbuf *key_setsadbxfrag (u_int16_t); 442 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 443 static int key_checksalen (const union sockaddr_union *); 444 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 445 u_int32_t, pid_t, u_int16_t); 446 static struct mbuf *key_setsadbsa (struct secasvar *); 447 static struct mbuf *key_setsadbaddr (u_int16_t, 448 const struct sockaddr *, u_int8_t, u_int16_t); 449 #if 0 450 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 451 int, u_int64_t); 452 #endif 453 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 454 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 455 u_int32_t); 456 static void *key_newbuf (const void *, u_int); 457 #ifdef INET6 458 static int key_ismyaddr6 (const struct sockaddr_in6 *); 459 #endif 460 461 static void sysctl_net_keyv2_setup(struct sysctllog **); 462 static void sysctl_net_key_compat_setup(struct sysctllog **); 463 464 /* flags for key_saidx_match() */ 465 #define CMP_HEAD 1 /* protocol, addresses. */ 466 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 467 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 468 #define CMP_EXACTLY 4 /* all elements. */ 469 static int key_saidx_match(const struct secasindex *, 470 const struct secasindex *, int); 471 472 static int key_sockaddr_match(const struct sockaddr *, 473 const struct sockaddr *, int); 474 static int key_bb_match_withmask(const void *, const void *, u_int); 475 static u_int16_t key_satype2proto (u_int8_t); 476 static u_int8_t key_proto2satype (u_int16_t); 477 478 static int key_spidx_match_exactly(const struct secpolicyindex *, 479 const struct secpolicyindex *); 480 static int key_spidx_match_withmask(const struct secpolicyindex *, 481 const struct secpolicyindex *); 482 483 static int key_api_getspi(struct socket *, struct mbuf *, 484 const struct sadb_msghdr *); 485 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 486 const struct secasindex *); 487 static int key_handle_natt_info (struct secasvar *, 488 const struct sadb_msghdr *); 489 static int key_set_natt_ports (union sockaddr_union *, 490 union sockaddr_union *, 491 const struct sadb_msghdr *); 492 static int key_api_update(struct socket *, struct mbuf *, 493 const struct sadb_msghdr *); 494 #ifdef IPSEC_DOSEQCHECK 495 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 496 #endif 497 static int key_api_add(struct socket *, struct mbuf *, 498 const struct sadb_msghdr *); 499 static int key_setident (struct secashead *, struct mbuf *, 500 const struct sadb_msghdr *); 501 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 502 const struct sadb_msghdr *); 503 static int key_api_delete(struct socket *, struct mbuf *, 504 const struct sadb_msghdr *); 505 static int key_api_get(struct socket *, struct mbuf *, 506 const struct sadb_msghdr *); 507 508 static void key_getcomb_setlifetime (struct sadb_comb *); 509 static struct mbuf *key_getcomb_esp (void); 510 static struct mbuf *key_getcomb_ah (void); 511 static struct mbuf *key_getcomb_ipcomp (void); 512 static struct mbuf *key_getprop (const struct secasindex *); 513 514 static int key_acquire (const struct secasindex *, struct secpolicy *); 515 #ifndef IPSEC_NONBLOCK_ACQUIRE 516 static struct secacq *key_newacq (const struct secasindex *); 517 static struct secacq *key_getacq (const struct secasindex *); 518 static struct secacq *key_getacqbyseq (u_int32_t); 519 #endif 520 #ifdef notyet 521 static struct secspacq *key_newspacq (const struct secpolicyindex *); 522 static struct secspacq *key_getspacq (const struct secpolicyindex *); 523 #endif 524 static int key_api_acquire(struct socket *, struct mbuf *, 525 const struct sadb_msghdr *); 526 static int key_api_register(struct socket *, struct mbuf *, 527 const struct sadb_msghdr *); 528 static int key_expire (struct secasvar *); 529 static int key_api_flush(struct socket *, struct mbuf *, 530 const struct sadb_msghdr *); 531 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 532 int *lenp, pid_t pid); 533 static int key_api_dump(struct socket *, struct mbuf *, 534 const struct sadb_msghdr *); 535 static int key_api_promisc(struct socket *, struct mbuf *, 536 const struct sadb_msghdr *); 537 static int key_senderror (struct socket *, struct mbuf *, int); 538 static int key_validate_ext (const struct sadb_ext *, int); 539 static int key_align (struct mbuf *, struct sadb_msghdr *); 540 #if 0 541 static const char *key_getfqdn (void); 542 static const char *key_getuserfqdn (void); 543 #endif 544 static void key_sa_chgstate (struct secasvar *, u_int8_t); 545 static inline void key_sp_dead (struct secpolicy *); 546 static void key_sp_unlink (struct secpolicy *sp); 547 548 static struct mbuf *key_alloc_mbuf (int); 549 550 static void key_timehandler(void *); 551 static void key_timehandler_work(struct work *, void *); 552 static struct callout key_timehandler_ch; 553 static struct workqueue *key_timehandler_wq; 554 static struct work key_timehandler_wk; 555 556 #ifdef IPSEC_REF_DEBUG 557 #define REFLOG(label, p, where, tag) \ 558 log(LOG_DEBUG, "%s:%d: " label " : refcnt=%d (%p)\n.", \ 559 (where), (tag), (p)->refcnt, (p)) 560 #else 561 #define REFLOG(label, p, where, tag) do {} while (0) 562 #endif 563 564 #define SA_ADDREF(p) do { \ 565 atomic_inc_uint(&(p)->refcnt); \ 566 REFLOG("SA_ADDREF", (p), __func__, __LINE__); \ 567 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 568 } while (0) 569 #define SA_ADDREF2(p, where, tag) do { \ 570 atomic_inc_uint(&(p)->refcnt); \ 571 REFLOG("SA_ADDREF", (p), (where), (tag)); \ 572 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 573 } while (0) 574 #define SA_DELREF(p) do { \ 575 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 576 atomic_dec_uint(&(p)->refcnt); \ 577 REFLOG("SA_DELREF", (p), __func__, __LINE__); \ 578 } while (0) 579 #define SA_DELREF2(p, nv, where, tag) do { \ 580 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 581 nv = atomic_dec_uint_nv(&(p)->refcnt); \ 582 REFLOG("SA_DELREF", (p), (where), (tag)); \ 583 } while (0) 584 585 #define SP_ADDREF(p) do { \ 586 atomic_inc_uint(&(p)->refcnt); \ 587 REFLOG("SP_ADDREF", (p), __func__, __LINE__); \ 588 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 589 } while (0) 590 #define SP_ADDREF2(p, where, tag) do { \ 591 atomic_inc_uint(&(p)->refcnt); \ 592 REFLOG("SP_ADDREF", (p), (where), (tag)); \ 593 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 594 } while (0) 595 #define SP_DELREF(p) do { \ 596 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 597 atomic_dec_uint(&(p)->refcnt); \ 598 REFLOG("SP_DELREF", (p), __func__, __LINE__); \ 599 } while (0) 600 #define SP_DELREF2(p, nv, where, tag) do { \ 601 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 602 nv = atomic_dec_uint_nv(&(p)->refcnt); \ 603 REFLOG("SP_DELREF", (p), (where), (tag)); \ 604 } while (0) 605 606 607 static inline void 608 key_sp_dead(struct secpolicy *sp) 609 { 610 611 /* mark the SP dead */ 612 sp->state = IPSEC_SPSTATE_DEAD; 613 } 614 615 static void 616 key_sp_unlink(struct secpolicy *sp) 617 { 618 619 /* remove from SP index */ 620 KASSERT(__LIST_CHAINED(sp)); 621 LIST_REMOVE(sp, chain); 622 /* Release refcount held just for being on chain */ 623 KEY_FREESP(&sp); 624 } 625 626 627 /* 628 * Return 0 when there are known to be no SP's for the specified 629 * direction. Otherwise return 1. This is used by IPsec code 630 * to optimize performance. 631 */ 632 int 633 key_havesp(u_int dir) 634 { 635 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 636 !LIST_EMPTY(&sptree[dir]) : 1); 637 } 638 639 /* %%% IPsec policy management */ 640 /* 641 * allocating a SP for OUTBOUND or INBOUND packet. 642 * Must call key_freesp() later. 643 * OUT: NULL: not found 644 * others: found and return the pointer. 645 */ 646 struct secpolicy * 647 key_lookup_sp_byspidx(const struct secpolicyindex *spidx, 648 u_int dir, const char* where, int tag) 649 { 650 struct secpolicy *sp; 651 int s; 652 653 KASSERT(spidx != NULL); 654 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 655 656 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 657 658 /* get a SP entry */ 659 s = splsoftnet(); /*called from softclock()*/ 660 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 661 printf("*** objects\n"); 662 kdebug_secpolicyindex(spidx); 663 } 664 665 LIST_FOREACH(sp, &sptree[dir], chain) { 666 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 667 printf("*** in SPD\n"); 668 kdebug_secpolicyindex(&sp->spidx); 669 } 670 671 if (sp->state == IPSEC_SPSTATE_DEAD) 672 continue; 673 if (key_spidx_match_withmask(&sp->spidx, spidx)) 674 goto found; 675 } 676 sp = NULL; 677 found: 678 if (sp) { 679 /* sanity check */ 680 KEY_CHKSPDIR(sp->spidx.dir, dir); 681 682 /* found a SPD entry */ 683 sp->lastused = time_uptime; 684 SP_ADDREF2(sp, where, tag); 685 } 686 splx(s); 687 688 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 689 "DP return SP:%p (ID=%u) refcnt %u\n", 690 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 691 return sp; 692 } 693 694 /* 695 * allocating a SP for OUTBOUND or INBOUND packet. 696 * Must call key_freesp() later. 697 * OUT: NULL: not found 698 * others: found and return the pointer. 699 */ 700 struct secpolicy * 701 key_lookup_sp(u_int32_t spi, 702 const union sockaddr_union *dst, 703 u_int8_t proto, 704 u_int dir, 705 const char* where, int tag) 706 { 707 struct secpolicy *sp; 708 int s; 709 710 KASSERT(dst != NULL); 711 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 712 713 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 714 715 /* get a SP entry */ 716 s = splsoftnet(); /*called from softclock()*/ 717 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 718 printf("*** objects\n"); 719 printf("spi %u proto %u dir %u\n", spi, proto, dir); 720 kdebug_sockaddr(&dst->sa); 721 } 722 723 LIST_FOREACH(sp, &sptree[dir], chain) { 724 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 725 printf("*** in SPD\n"); 726 kdebug_secpolicyindex(&sp->spidx); 727 } 728 729 if (sp->state == IPSEC_SPSTATE_DEAD) 730 continue; 731 /* compare simple values, then dst address */ 732 if (sp->spidx.ul_proto != proto) 733 continue; 734 /* NB: spi's must exist and match */ 735 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 736 continue; 737 if (key_sockaddr_match(&sp->spidx.dst.sa, &dst->sa, PORT_STRICT)) 738 goto found; 739 } 740 sp = NULL; 741 found: 742 if (sp) { 743 /* sanity check */ 744 KEY_CHKSPDIR(sp->spidx.dir, dir); 745 746 /* found a SPD entry */ 747 sp->lastused = time_uptime; 748 SP_ADDREF2(sp, where, tag); 749 } 750 splx(s); 751 752 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 753 "DP return SP:%p (ID=%u) refcnt %u\n", 754 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 755 return sp; 756 } 757 758 /* 759 * return a policy that matches this particular inbound packet. 760 * XXX slow 761 */ 762 struct secpolicy * 763 key_gettunnel(const struct sockaddr *osrc, 764 const struct sockaddr *odst, 765 const struct sockaddr *isrc, 766 const struct sockaddr *idst, 767 const char* where, int tag) 768 { 769 struct secpolicy *sp; 770 const int dir = IPSEC_DIR_INBOUND; 771 int s; 772 struct ipsecrequest *r1, *r2, *p; 773 struct secpolicyindex spidx; 774 775 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 776 777 if (isrc->sa_family != idst->sa_family) { 778 IPSECLOG(LOG_ERR, "protocol family mismatched %d != %d\n.", 779 isrc->sa_family, idst->sa_family); 780 sp = NULL; 781 goto done; 782 } 783 784 s = splsoftnet(); /*called from softclock()*/ 785 LIST_FOREACH(sp, &sptree[dir], chain) { 786 if (sp->state == IPSEC_SPSTATE_DEAD) 787 continue; 788 789 r1 = r2 = NULL; 790 for (p = sp->req; p; p = p->next) { 791 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 792 continue; 793 794 r1 = r2; 795 r2 = p; 796 797 if (!r1) { 798 /* here we look at address matches only */ 799 spidx = sp->spidx; 800 if (isrc->sa_len > sizeof(spidx.src) || 801 idst->sa_len > sizeof(spidx.dst)) 802 continue; 803 memcpy(&spidx.src, isrc, isrc->sa_len); 804 memcpy(&spidx.dst, idst, idst->sa_len); 805 if (!key_spidx_match_withmask(&sp->spidx, &spidx)) 806 continue; 807 } else { 808 if (!key_sockaddr_match(&r1->saidx.src.sa, isrc, PORT_NONE) || 809 !key_sockaddr_match(&r1->saidx.dst.sa, idst, PORT_NONE)) 810 continue; 811 } 812 813 if (!key_sockaddr_match(&r2->saidx.src.sa, osrc, PORT_NONE) || 814 !key_sockaddr_match(&r2->saidx.dst.sa, odst, PORT_NONE)) 815 continue; 816 817 goto found; 818 } 819 } 820 sp = NULL; 821 found: 822 if (sp) { 823 sp->lastused = time_uptime; 824 SP_ADDREF2(sp, where, tag); 825 } 826 splx(s); 827 done: 828 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 829 "DP return SP:%p (ID=%u) refcnt %u\n", 830 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 831 return sp; 832 } 833 834 /* 835 * allocating an SA entry for an *OUTBOUND* packet. 836 * checking each request entries in SP, and acquire an SA if need. 837 * OUT: 0: there are valid requests. 838 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 839 */ 840 int 841 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 842 { 843 u_int level; 844 int error; 845 struct secasvar *oldsav = NULL; 846 847 KASSERT(isr != NULL); 848 KASSERT(saidx != NULL); 849 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 850 saidx->mode == IPSEC_MODE_TUNNEL, 851 "unexpected policy %u", saidx->mode); 852 853 /* get current level */ 854 level = ipsec_get_reqlevel(isr); 855 856 /* 857 * XXX guard against protocol callbacks from the crypto 858 * thread as they reference ipsecrequest.sav which we 859 * temporarily null out below. Need to rethink how we 860 * handle bundled SA's in the callback thread. 861 */ 862 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 863 #if 0 864 /* 865 * We do allocate new SA only if the state of SA in the holder is 866 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 867 */ 868 if (isr->sav != NULL) { 869 if (isr->sav->sah == NULL) 870 panic("key_checkrequest: sah is null"); 871 if (isr->sav == (struct secasvar *)LIST_FIRST( 872 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 873 KEY_FREESAV(&isr->sav); 874 isr->sav = NULL; 875 } 876 } 877 #else 878 /* 879 * we free any SA stashed in the IPsec request because a different 880 * SA may be involved each time this request is checked, either 881 * because new SAs are being configured, or this request is 882 * associated with an unconnected datagram socket, or this request 883 * is associated with a system default policy. 884 * 885 * The operation may have negative impact to performance. We may 886 * want to check cached SA carefully, rather than picking new SA 887 * every time. 888 */ 889 if (isr->sav != NULL) 890 oldsav = isr->sav; 891 #endif 892 893 /* 894 * new SA allocation if no SA found. 895 * key_allocsa_policy should allocate the oldest SA available. 896 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 897 */ 898 isr->sav = key_allocsa_policy(saidx); 899 membar_producer(); 900 if (oldsav != NULL) 901 KEY_FREESAV(&oldsav); 902 903 /* When there is SA. */ 904 if (isr->sav != NULL) { 905 if (isr->sav->state != SADB_SASTATE_MATURE && 906 isr->sav->state != SADB_SASTATE_DYING) 907 return EINVAL; 908 return 0; 909 } 910 911 /* there is no SA */ 912 error = key_acquire(saidx, isr->sp); 913 if (error != 0) { 914 /* XXX What should I do ? */ 915 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 916 error); 917 return error; 918 } 919 920 if (level != IPSEC_LEVEL_REQUIRE) { 921 /* XXX sigh, the interface to this routine is botched */ 922 KASSERTMSG(isr->sav == NULL, "unexpected SA"); 923 return 0; 924 } else { 925 return ENOENT; 926 } 927 } 928 929 /* 930 * allocating a SA for policy entry from SAD. 931 * NOTE: searching SAD of aliving state. 932 * OUT: NULL: not found. 933 * others: found and return the pointer. 934 */ 935 static struct secasvar * 936 key_allocsa_policy(const struct secasindex *saidx) 937 { 938 struct secashead *sah; 939 struct secasvar *sav; 940 u_int stateidx, state; 941 const u_int *saorder_state_valid; 942 int arraysize; 943 944 sah = key_getsah(saidx, CMP_MODE_REQID); 945 if (sah == NULL) 946 return NULL; 947 948 /* 949 * search a valid state list for outbound packet. 950 * This search order is important. 951 */ 952 if (key_prefered_oldsa) { 953 saorder_state_valid = saorder_state_valid_prefer_old; 954 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 955 } else { 956 saorder_state_valid = saorder_state_valid_prefer_new; 957 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 958 } 959 960 /* search valid state */ 961 for (stateidx = 0; 962 stateidx < arraysize; 963 stateidx++) { 964 965 state = saorder_state_valid[stateidx]; 966 967 sav = key_do_allocsa_policy(sah, state); 968 if (sav != NULL) 969 return sav; 970 } 971 972 return NULL; 973 } 974 975 /* 976 * searching SAD with direction, protocol, mode and state. 977 * called by key_allocsa_policy(). 978 * OUT: 979 * NULL : not found 980 * others : found, pointer to a SA. 981 */ 982 static struct secasvar * 983 key_do_allocsa_policy(struct secashead *sah, u_int state) 984 { 985 struct secasvar *sav, *candidate, *d; 986 987 /* initilize */ 988 candidate = NULL; 989 990 LIST_FOREACH(sav, &sah->savtree[state], chain) { 991 /* sanity check */ 992 KEY_CHKSASTATE(sav->state, state); 993 994 /* initialize */ 995 if (candidate == NULL) { 996 candidate = sav; 997 continue; 998 } 999 1000 /* Which SA is the better ? */ 1001 1002 /* sanity check 2 */ 1003 KASSERT(candidate->lft_c != NULL); 1004 KASSERT(sav->lft_c != NULL); 1005 1006 /* What the best method is to compare ? */ 1007 if (key_prefered_oldsa) { 1008 if (candidate->lft_c->sadb_lifetime_addtime > 1009 sav->lft_c->sadb_lifetime_addtime) { 1010 candidate = sav; 1011 } 1012 continue; 1013 /*NOTREACHED*/ 1014 } 1015 1016 /* prefered new sa rather than old sa */ 1017 if (candidate->lft_c->sadb_lifetime_addtime < 1018 sav->lft_c->sadb_lifetime_addtime) { 1019 d = candidate; 1020 candidate = sav; 1021 } else 1022 d = sav; 1023 1024 /* 1025 * prepared to delete the SA when there is more 1026 * suitable candidate and the lifetime of the SA is not 1027 * permanent. 1028 */ 1029 if (d->lft_c->sadb_lifetime_addtime != 0) { 1030 struct mbuf *m, *result = 0; 1031 uint8_t satype; 1032 1033 key_sa_chgstate(d, SADB_SASTATE_DEAD); 1034 1035 KASSERT(d->refcnt > 0); 1036 1037 satype = key_proto2satype(d->sah->saidx.proto); 1038 if (satype == 0) 1039 goto msgfail; 1040 1041 m = key_setsadbmsg(SADB_DELETE, 0, 1042 satype, 0, 0, d->refcnt - 1); 1043 if (!m) 1044 goto msgfail; 1045 result = m; 1046 1047 /* set sadb_address for saidx's. */ 1048 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1049 &d->sah->saidx.src.sa, 1050 d->sah->saidx.src.sa.sa_len << 3, 1051 IPSEC_ULPROTO_ANY); 1052 if (!m) 1053 goto msgfail; 1054 m_cat(result, m); 1055 1056 /* set sadb_address for saidx's. */ 1057 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1058 &d->sah->saidx.src.sa, 1059 d->sah->saidx.src.sa.sa_len << 3, 1060 IPSEC_ULPROTO_ANY); 1061 if (!m) 1062 goto msgfail; 1063 m_cat(result, m); 1064 1065 /* create SA extension */ 1066 m = key_setsadbsa(d); 1067 if (!m) 1068 goto msgfail; 1069 m_cat(result, m); 1070 1071 if (result->m_len < sizeof(struct sadb_msg)) { 1072 result = m_pullup(result, 1073 sizeof(struct sadb_msg)); 1074 if (result == NULL) 1075 goto msgfail; 1076 } 1077 1078 result->m_pkthdr.len = 0; 1079 for (m = result; m; m = m->m_next) 1080 result->m_pkthdr.len += m->m_len; 1081 mtod(result, struct sadb_msg *)->sadb_msg_len = 1082 PFKEY_UNIT64(result->m_pkthdr.len); 1083 1084 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1085 result = 0; 1086 msgfail: 1087 if (result) 1088 m_freem(result); 1089 KEY_FREESAV(&d); 1090 } 1091 } 1092 1093 if (candidate) { 1094 SA_ADDREF(candidate); 1095 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1096 "DP cause refcnt++:%d SA:%p\n", 1097 candidate->refcnt, candidate); 1098 } 1099 return candidate; 1100 } 1101 1102 /* 1103 * allocating a usable SA entry for a *INBOUND* packet. 1104 * Must call key_freesav() later. 1105 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1106 * NULL: not found, or error occurred. 1107 * 1108 * In the comparison, no source address is used--for RFC2401 conformance. 1109 * To quote, from section 4.1: 1110 * A security association is uniquely identified by a triple consisting 1111 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1112 * security protocol (AH or ESP) identifier. 1113 * Note that, however, we do need to keep source address in IPsec SA. 1114 * IKE specification and PF_KEY specification do assume that we 1115 * keep source address in IPsec SA. We see a tricky situation here. 1116 * 1117 * sport and dport are used for NAT-T. network order is always used. 1118 */ 1119 struct secasvar * 1120 key_lookup_sa( 1121 const union sockaddr_union *dst, 1122 u_int proto, 1123 u_int32_t spi, 1124 u_int16_t sport, 1125 u_int16_t dport, 1126 const char* where, int tag) 1127 { 1128 struct secashead *sah; 1129 struct secasvar *sav; 1130 u_int stateidx, state; 1131 const u_int *saorder_state_valid; 1132 int arraysize, chkport; 1133 int s; 1134 1135 int must_check_spi = 1; 1136 int must_check_alg = 0; 1137 u_int16_t cpi = 0; 1138 u_int8_t algo = 0; 1139 1140 if ((sport != 0) && (dport != 0)) 1141 chkport = PORT_STRICT; 1142 else 1143 chkport = PORT_NONE; 1144 1145 KASSERT(dst != NULL); 1146 1147 /* 1148 * XXX IPCOMP case 1149 * We use cpi to define spi here. In the case where cpi <= 1150 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1151 * the real spi. In this case, don't check the spi but check the 1152 * algorithm 1153 */ 1154 1155 if (proto == IPPROTO_IPCOMP) { 1156 u_int32_t tmp; 1157 tmp = ntohl(spi); 1158 cpi = (u_int16_t) tmp; 1159 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1160 algo = (u_int8_t) cpi; 1161 must_check_spi = 0; 1162 must_check_alg = 1; 1163 } 1164 } 1165 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1166 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1167 where, tag, must_check_spi, must_check_alg); 1168 1169 1170 /* 1171 * searching SAD. 1172 * XXX: to be checked internal IP header somewhere. Also when 1173 * IPsec tunnel packet is received. But ESP tunnel mode is 1174 * encrypted so we can't check internal IP header. 1175 */ 1176 s = splsoftnet(); /*called from softclock()*/ 1177 if (key_prefered_oldsa) { 1178 saorder_state_valid = saorder_state_valid_prefer_old; 1179 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1180 } else { 1181 saorder_state_valid = saorder_state_valid_prefer_new; 1182 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1183 } 1184 LIST_FOREACH(sah, &sahtree, chain) { 1185 /* search valid state */ 1186 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1187 state = saorder_state_valid[stateidx]; 1188 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1189 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1190 "try match spi %#x, %#x\n", 1191 ntohl(spi), ntohl(sav->spi)); 1192 /* sanity check */ 1193 KEY_CHKSASTATE(sav->state, state); 1194 /* do not return entries w/ unusable state */ 1195 if (!SADB_SASTATE_USABLE_P(sav)) { 1196 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1197 "bad state %d\n", sav->state); 1198 continue; 1199 } 1200 if (proto != sav->sah->saidx.proto) { 1201 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1202 "proto fail %d != %d\n", 1203 proto, sav->sah->saidx.proto); 1204 continue; 1205 } 1206 if (must_check_spi && spi != sav->spi) { 1207 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1208 "spi fail %#x != %#x\n", 1209 ntohl(spi), ntohl(sav->spi)); 1210 continue; 1211 } 1212 /* XXX only on the ipcomp case */ 1213 if (must_check_alg && algo != sav->alg_comp) { 1214 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1215 "algo fail %d != %d\n", 1216 algo, sav->alg_comp); 1217 continue; 1218 } 1219 1220 #if 0 /* don't check src */ 1221 /* Fix port in src->sa */ 1222 1223 /* check src address */ 1224 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1225 continue; 1226 #endif 1227 /* fix port of dst address XXX*/ 1228 key_porttosaddr(__UNCONST(dst), dport); 1229 /* check dst address */ 1230 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1231 continue; 1232 SA_ADDREF2(sav, where, tag); 1233 goto done; 1234 } 1235 } 1236 } 1237 sav = NULL; 1238 done: 1239 splx(s); 1240 1241 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1242 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1243 return sav; 1244 } 1245 1246 void 1247 key_sp_ref(struct secpolicy *sp, const char* where, int tag) 1248 { 1249 1250 SP_ADDREF2(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 1257 /* 1258 * Must be called after calling key_lookup_sp*(). 1259 * For both the packet without socket and key_freeso(). 1260 */ 1261 void 1262 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1263 { 1264 struct secpolicy *sp = *spp; 1265 unsigned int nv; 1266 1267 KASSERT(sp != NULL); 1268 1269 SP_DELREF2(sp, nv, where, tag); 1270 1271 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1272 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1273 sp, sp->id, where, tag, nv); 1274 1275 if (nv == 0) { 1276 *spp = NULL; 1277 key_delsp(sp); 1278 } 1279 } 1280 1281 #if 0 1282 /* 1283 * Must be called after calling key_lookup_sp*(). 1284 * For the packet with socket. 1285 */ 1286 static void 1287 key_freeso(struct socket *so) 1288 { 1289 /* sanity check */ 1290 KASSERT(so != NULL); 1291 1292 switch (so->so_proto->pr_domain->dom_family) { 1293 #ifdef INET 1294 case PF_INET: 1295 { 1296 struct inpcb *pcb = sotoinpcb(so); 1297 1298 /* Does it have a PCB ? */ 1299 if (pcb == NULL) 1300 return; 1301 1302 struct inpcbpolicy *sp = pcb->inp_sp; 1303 key_freesp_so(&sp->sp_in); 1304 key_freesp_so(&sp->sp_out); 1305 } 1306 break; 1307 #endif 1308 #ifdef INET6 1309 case PF_INET6: 1310 { 1311 #ifdef HAVE_NRL_INPCB 1312 struct inpcb *pcb = sotoinpcb(so); 1313 struct inpcbpolicy *sp = pcb->inp_sp; 1314 1315 /* Does it have a PCB ? */ 1316 if (pcb == NULL) 1317 return; 1318 key_freesp_so(&sp->sp_in); 1319 key_freesp_so(&sp->sp_out); 1320 #else 1321 struct in6pcb *pcb = sotoin6pcb(so); 1322 1323 /* Does it have a PCB ? */ 1324 if (pcb == NULL) 1325 return; 1326 key_freesp_so(&pcb->in6p_sp->sp_in); 1327 key_freesp_so(&pcb->in6p_sp->sp_out); 1328 #endif 1329 } 1330 break; 1331 #endif /* INET6 */ 1332 default: 1333 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1334 so->so_proto->pr_domain->dom_family); 1335 return; 1336 } 1337 } 1338 1339 static void 1340 key_freesp_so(struct secpolicy **sp) 1341 { 1342 1343 KASSERT(sp != NULL); 1344 KASSERT(*sp != NULL); 1345 1346 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1347 (*sp)->policy == IPSEC_POLICY_BYPASS) 1348 return; 1349 1350 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1351 "invalid policy %u", (*sp)->policy); 1352 KEY_FREESP(sp); 1353 } 1354 #endif 1355 1356 /* 1357 * Must be called after calling key_lookup_sa(). 1358 * This function is called by key_freesp() to free some SA allocated 1359 * for a policy. 1360 */ 1361 void 1362 key_freesav(struct secasvar **psav, const char* where, int tag) 1363 { 1364 struct secasvar *sav = *psav; 1365 unsigned int nv; 1366 1367 KASSERT(sav != NULL); 1368 1369 SA_DELREF2(sav, nv, where, tag); 1370 1371 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1372 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1373 sav, (u_long)ntohl(sav->spi), where, tag, nv); 1374 1375 if (nv == 0) { 1376 *psav = NULL; 1377 1378 /* remove from SA header */ 1379 KASSERT(__LIST_CHAINED(sav)); 1380 LIST_REMOVE(sav, chain); 1381 1382 key_delsav(sav); 1383 } 1384 } 1385 1386 /* %%% SPD management */ 1387 /* 1388 * free security policy entry. 1389 */ 1390 static void 1391 key_delsp(struct secpolicy *sp) 1392 { 1393 int s; 1394 1395 KASSERT(sp != NULL); 1396 1397 key_sp_dead(sp); 1398 1399 KASSERTMSG(sp->refcnt == 0, 1400 "SP with references deleted (refcnt %u)", sp->refcnt); 1401 1402 s = splsoftnet(); /*called from softclock()*/ 1403 1404 { 1405 struct ipsecrequest *isr = sp->req, *nextisr; 1406 1407 while (isr != NULL) { 1408 if (isr->sav != NULL) { 1409 KEY_FREESAV(&isr->sav); 1410 isr->sav = NULL; 1411 } 1412 1413 nextisr = isr->next; 1414 kmem_intr_free(isr, sizeof(*isr)); 1415 isr = nextisr; 1416 } 1417 } 1418 1419 kmem_intr_free(sp, sizeof(*sp)); 1420 1421 splx(s); 1422 } 1423 1424 /* 1425 * search SPD 1426 * OUT: NULL : not found 1427 * others : found, pointer to a SP. 1428 */ 1429 static struct secpolicy * 1430 key_getsp(const struct secpolicyindex *spidx) 1431 { 1432 struct secpolicy *sp; 1433 1434 KASSERT(spidx != NULL); 1435 1436 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1437 if (sp->state == IPSEC_SPSTATE_DEAD) 1438 continue; 1439 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1440 SP_ADDREF(sp); 1441 return sp; 1442 } 1443 } 1444 1445 return NULL; 1446 } 1447 1448 /* 1449 * get SP by index. 1450 * OUT: NULL : not found 1451 * others : found, pointer to a SP. 1452 */ 1453 static struct secpolicy * 1454 key_getspbyid(u_int32_t id) 1455 { 1456 struct secpolicy *sp; 1457 1458 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1459 if (sp->state == IPSEC_SPSTATE_DEAD) 1460 continue; 1461 if (sp->id == id) { 1462 SP_ADDREF(sp); 1463 return sp; 1464 } 1465 } 1466 1467 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1468 if (sp->state == IPSEC_SPSTATE_DEAD) 1469 continue; 1470 if (sp->id == id) { 1471 SP_ADDREF(sp); 1472 return sp; 1473 } 1474 } 1475 1476 return NULL; 1477 } 1478 1479 struct secpolicy * 1480 key_newsp(const char* where, int tag) 1481 { 1482 struct secpolicy *newsp = NULL; 1483 1484 newsp = kmem_intr_zalloc(sizeof(struct secpolicy), KM_NOSLEEP); 1485 if (newsp != NULL) 1486 newsp->refcnt = 1; 1487 1488 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1489 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1490 return newsp; 1491 } 1492 1493 /* 1494 * create secpolicy structure from sadb_x_policy structure. 1495 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1496 * so must be set properly later. 1497 */ 1498 struct secpolicy * 1499 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1500 { 1501 struct secpolicy *newsp; 1502 1503 KASSERT(!cpu_softintr_p()); 1504 KASSERT(xpl0 != NULL); 1505 KASSERT(len >= sizeof(*xpl0)); 1506 1507 if (len != PFKEY_EXTLEN(xpl0)) { 1508 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1509 *error = EINVAL; 1510 return NULL; 1511 } 1512 1513 newsp = KEY_NEWSP(); 1514 if (newsp == NULL) { 1515 *error = ENOBUFS; 1516 return NULL; 1517 } 1518 1519 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1520 newsp->policy = xpl0->sadb_x_policy_type; 1521 1522 /* check policy */ 1523 switch (xpl0->sadb_x_policy_type) { 1524 case IPSEC_POLICY_DISCARD: 1525 case IPSEC_POLICY_NONE: 1526 case IPSEC_POLICY_ENTRUST: 1527 case IPSEC_POLICY_BYPASS: 1528 newsp->req = NULL; 1529 *error = 0; 1530 return newsp; 1531 1532 case IPSEC_POLICY_IPSEC: 1533 /* Continued */ 1534 break; 1535 default: 1536 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1537 KEY_FREESP(&newsp); 1538 *error = EINVAL; 1539 return NULL; 1540 } 1541 1542 /* IPSEC_POLICY_IPSEC */ 1543 { 1544 int tlen; 1545 const struct sadb_x_ipsecrequest *xisr; 1546 uint16_t xisr_reqid; 1547 struct ipsecrequest **p_isr = &newsp->req; 1548 1549 /* validity check */ 1550 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1551 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1552 *error = EINVAL; 1553 goto free_exit; 1554 } 1555 1556 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1557 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1558 1559 while (tlen > 0) { 1560 /* length check */ 1561 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1562 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1563 *error = EINVAL; 1564 goto free_exit; 1565 } 1566 1567 /* allocate request buffer */ 1568 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1569 1570 /* set values */ 1571 (*p_isr)->next = NULL; 1572 1573 switch (xisr->sadb_x_ipsecrequest_proto) { 1574 case IPPROTO_ESP: 1575 case IPPROTO_AH: 1576 case IPPROTO_IPCOMP: 1577 break; 1578 default: 1579 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1580 xisr->sadb_x_ipsecrequest_proto); 1581 *error = EPROTONOSUPPORT; 1582 goto free_exit; 1583 } 1584 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1585 1586 switch (xisr->sadb_x_ipsecrequest_mode) { 1587 case IPSEC_MODE_TRANSPORT: 1588 case IPSEC_MODE_TUNNEL: 1589 break; 1590 case IPSEC_MODE_ANY: 1591 default: 1592 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1593 xisr->sadb_x_ipsecrequest_mode); 1594 *error = EINVAL; 1595 goto free_exit; 1596 } 1597 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1598 1599 switch (xisr->sadb_x_ipsecrequest_level) { 1600 case IPSEC_LEVEL_DEFAULT: 1601 case IPSEC_LEVEL_USE: 1602 case IPSEC_LEVEL_REQUIRE: 1603 break; 1604 case IPSEC_LEVEL_UNIQUE: 1605 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1606 /* validity check */ 1607 /* 1608 * If range violation of reqid, kernel will 1609 * update it, don't refuse it. 1610 */ 1611 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1612 IPSECLOG(LOG_DEBUG, 1613 "reqid=%d range " 1614 "violation, updated by kernel.\n", 1615 xisr_reqid); 1616 xisr_reqid = 0; 1617 } 1618 1619 /* allocate new reqid id if reqid is zero. */ 1620 if (xisr_reqid == 0) { 1621 u_int16_t reqid = key_newreqid(); 1622 if (reqid == 0) { 1623 *error = ENOBUFS; 1624 goto free_exit; 1625 } 1626 (*p_isr)->saidx.reqid = reqid; 1627 } else { 1628 /* set it for manual keying. */ 1629 (*p_isr)->saidx.reqid = xisr_reqid; 1630 } 1631 break; 1632 1633 default: 1634 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1635 xisr->sadb_x_ipsecrequest_level); 1636 *error = EINVAL; 1637 goto free_exit; 1638 } 1639 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1640 1641 /* set IP addresses if there */ 1642 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1643 const struct sockaddr *paddr; 1644 1645 paddr = (const struct sockaddr *)(xisr + 1); 1646 1647 /* validity check */ 1648 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1649 IPSECLOG(LOG_DEBUG, "invalid request " 1650 "address length.\n"); 1651 *error = EINVAL; 1652 goto free_exit; 1653 } 1654 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1655 1656 paddr = (const struct sockaddr *)((const char *)paddr 1657 + paddr->sa_len); 1658 1659 /* validity check */ 1660 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1661 IPSECLOG(LOG_DEBUG, "invalid request " 1662 "address length.\n"); 1663 *error = EINVAL; 1664 goto free_exit; 1665 } 1666 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1667 } 1668 1669 (*p_isr)->sav = NULL; 1670 (*p_isr)->sp = newsp; 1671 1672 /* initialization for the next. */ 1673 p_isr = &(*p_isr)->next; 1674 tlen -= xisr->sadb_x_ipsecrequest_len; 1675 1676 /* validity check */ 1677 if (tlen < 0) { 1678 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 1679 *error = EINVAL; 1680 goto free_exit; 1681 } 1682 1683 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 1684 xisr->sadb_x_ipsecrequest_len); 1685 } 1686 } 1687 1688 *error = 0; 1689 return newsp; 1690 1691 free_exit: 1692 KEY_FREESP(&newsp); 1693 return NULL; 1694 } 1695 1696 static u_int16_t 1697 key_newreqid(void) 1698 { 1699 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1700 1701 auto_reqid = (auto_reqid == 0xffff ? 1702 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1703 1704 /* XXX should be unique check */ 1705 1706 return auto_reqid; 1707 } 1708 1709 /* 1710 * copy secpolicy struct to sadb_x_policy structure indicated. 1711 */ 1712 struct mbuf * 1713 key_sp2msg(const struct secpolicy *sp) 1714 { 1715 struct sadb_x_policy *xpl; 1716 int tlen; 1717 char *p; 1718 struct mbuf *m; 1719 1720 KASSERT(sp != NULL); 1721 1722 tlen = key_getspreqmsglen(sp); 1723 1724 m = key_alloc_mbuf(tlen); 1725 if (!m || m->m_next) { /*XXX*/ 1726 if (m) 1727 m_freem(m); 1728 return NULL; 1729 } 1730 1731 m->m_len = tlen; 1732 m->m_next = NULL; 1733 xpl = mtod(m, struct sadb_x_policy *); 1734 memset(xpl, 0, tlen); 1735 1736 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1737 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1738 xpl->sadb_x_policy_type = sp->policy; 1739 xpl->sadb_x_policy_dir = sp->spidx.dir; 1740 xpl->sadb_x_policy_id = sp->id; 1741 p = (char *)xpl + sizeof(*xpl); 1742 1743 /* if is the policy for ipsec ? */ 1744 if (sp->policy == IPSEC_POLICY_IPSEC) { 1745 struct sadb_x_ipsecrequest *xisr; 1746 struct ipsecrequest *isr; 1747 1748 for (isr = sp->req; isr != NULL; isr = isr->next) { 1749 1750 xisr = (struct sadb_x_ipsecrequest *)p; 1751 1752 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1753 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1754 xisr->sadb_x_ipsecrequest_level = isr->level; 1755 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1756 1757 p += sizeof(*xisr); 1758 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1759 p += isr->saidx.src.sa.sa_len; 1760 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1761 p += isr->saidx.src.sa.sa_len; 1762 1763 xisr->sadb_x_ipsecrequest_len = 1764 PFKEY_ALIGN8(sizeof(*xisr) 1765 + isr->saidx.src.sa.sa_len 1766 + isr->saidx.dst.sa.sa_len); 1767 } 1768 } 1769 1770 return m; 1771 } 1772 1773 /* m will not be freed nor modified */ 1774 static struct mbuf * 1775 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1776 int ndeep, int nitem, ...) 1777 { 1778 va_list ap; 1779 int idx; 1780 int i; 1781 struct mbuf *result = NULL, *n; 1782 int len; 1783 1784 KASSERT(m != NULL); 1785 KASSERT(mhp != NULL); 1786 1787 va_start(ap, nitem); 1788 for (i = 0; i < nitem; i++) { 1789 idx = va_arg(ap, int); 1790 if (idx < 0 || idx > SADB_EXT_MAX) 1791 goto fail; 1792 /* don't attempt to pull empty extension */ 1793 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1794 continue; 1795 if (idx != SADB_EXT_RESERVED && 1796 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1797 continue; 1798 1799 if (idx == SADB_EXT_RESERVED) { 1800 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1801 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1802 MGETHDR(n, M_DONTWAIT, MT_DATA); 1803 if (!n) 1804 goto fail; 1805 n->m_len = len; 1806 n->m_next = NULL; 1807 m_copydata(m, 0, sizeof(struct sadb_msg), 1808 mtod(n, void *)); 1809 } else if (i < ndeep) { 1810 len = mhp->extlen[idx]; 1811 n = key_alloc_mbuf(len); 1812 if (!n || n->m_next) { /*XXX*/ 1813 if (n) 1814 m_freem(n); 1815 goto fail; 1816 } 1817 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1818 mtod(n, void *)); 1819 } else { 1820 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1821 M_DONTWAIT); 1822 } 1823 if (n == NULL) 1824 goto fail; 1825 1826 if (result) 1827 m_cat(result, n); 1828 else 1829 result = n; 1830 } 1831 va_end(ap); 1832 1833 if (result && (result->m_flags & M_PKTHDR) != 0) { 1834 result->m_pkthdr.len = 0; 1835 for (n = result; n; n = n->m_next) 1836 result->m_pkthdr.len += n->m_len; 1837 } 1838 1839 return result; 1840 1841 fail: 1842 va_end(ap); 1843 m_freem(result); 1844 return NULL; 1845 } 1846 1847 /* 1848 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1849 * add an entry to SP database, when received 1850 * <base, address(SD), (lifetime(H),) policy> 1851 * from the user(?). 1852 * Adding to SP database, 1853 * and send 1854 * <base, address(SD), (lifetime(H),) policy> 1855 * to the socket which was send. 1856 * 1857 * SPDADD set a unique policy entry. 1858 * SPDSETIDX like SPDADD without a part of policy requests. 1859 * SPDUPDATE replace a unique policy entry. 1860 * 1861 * m will always be freed. 1862 */ 1863 static int 1864 key_api_spdadd(struct socket *so, struct mbuf *m, 1865 const struct sadb_msghdr *mhp) 1866 { 1867 const struct sockaddr *src, *dst; 1868 const struct sadb_x_policy *xpl0; 1869 struct sadb_x_policy *xpl; 1870 const struct sadb_lifetime *lft = NULL; 1871 struct secpolicyindex spidx; 1872 struct secpolicy *newsp; 1873 int error; 1874 1875 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1876 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1877 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1878 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1879 return key_senderror(so, m, EINVAL); 1880 } 1881 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1882 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1883 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1884 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1885 return key_senderror(so, m, EINVAL); 1886 } 1887 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1888 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 1889 sizeof(struct sadb_lifetime)) { 1890 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1891 return key_senderror(so, m, EINVAL); 1892 } 1893 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1894 } 1895 1896 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1897 1898 /* checking the direciton. */ 1899 switch (xpl0->sadb_x_policy_dir) { 1900 case IPSEC_DIR_INBOUND: 1901 case IPSEC_DIR_OUTBOUND: 1902 break; 1903 default: 1904 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 1905 return key_senderror(so, m, EINVAL); 1906 } 1907 1908 /* check policy */ 1909 /* key_api_spdadd() accepts DISCARD, NONE and IPSEC. */ 1910 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 1911 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1912 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 1913 return key_senderror(so, m, EINVAL); 1914 } 1915 1916 /* policy requests are mandatory when action is ipsec. */ 1917 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 1918 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 1919 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1920 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 1921 return key_senderror(so, m, EINVAL); 1922 } 1923 1924 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 1925 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 1926 1927 /* sanity check on addr pair */ 1928 if (src->sa_family != dst->sa_family) 1929 return key_senderror(so, m, EINVAL); 1930 if (src->sa_len != dst->sa_len) 1931 return key_senderror(so, m, EINVAL); 1932 1933 key_init_spidx_bymsghdr(&spidx, mhp); 1934 1935 /* 1936 * checking there is SP already or not. 1937 * SPDUPDATE doesn't depend on whether there is a SP or not. 1938 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1939 * then error. 1940 */ 1941 { 1942 struct secpolicy *sp; 1943 1944 sp = key_getsp(&spidx); 1945 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1946 if (sp) { 1947 key_sp_dead(sp); 1948 key_sp_unlink(sp); /* XXX jrs ordering */ 1949 KEY_FREESP(&sp); 1950 } 1951 } else { 1952 if (sp != NULL) { 1953 KEY_FREESP(&sp); 1954 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 1955 return key_senderror(so, m, EEXIST); 1956 } 1957 } 1958 } 1959 1960 /* allocation new SP entry */ 1961 newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error); 1962 if (newsp == NULL) { 1963 return key_senderror(so, m, error); 1964 } 1965 1966 newsp->id = key_getnewspid(); 1967 if (newsp->id == 0) { 1968 kmem_free(newsp, sizeof(*newsp)); 1969 return key_senderror(so, m, ENOBUFS); 1970 } 1971 1972 newsp->spidx = spidx; 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 int off; 2011 2012 /* create new sadb_msg to reply. */ 2013 if (lft) { 2014 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2015 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2016 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2017 } else { 2018 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2019 SADB_X_EXT_POLICY, 2020 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2021 } 2022 if (!n) 2023 return key_senderror(so, m, ENOBUFS); 2024 2025 n = key_fill_replymsg(n, 0); 2026 if (n == NULL) 2027 return key_senderror(so, m, ENOBUFS); 2028 2029 off = 0; 2030 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2031 sizeof(*xpl), &off); 2032 if (mpolicy == NULL) { 2033 /* n is already freed */ 2034 return key_senderror(so, m, ENOBUFS); 2035 } 2036 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2037 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2038 m_freem(n); 2039 return key_senderror(so, m, EINVAL); 2040 } 2041 xpl->sadb_x_policy_id = newsp->id; 2042 2043 m_freem(m); 2044 key_update_used(); 2045 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2046 } 2047 } 2048 2049 /* 2050 * get new policy id. 2051 * OUT: 2052 * 0: failure. 2053 * others: success. 2054 */ 2055 static u_int32_t 2056 key_getnewspid(void) 2057 { 2058 u_int32_t newid = 0; 2059 int count = key_spi_trycnt; /* XXX */ 2060 struct secpolicy *sp; 2061 2062 /* when requesting to allocate spi ranged */ 2063 while (count--) { 2064 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2065 2066 sp = key_getspbyid(newid); 2067 if (sp == NULL) 2068 break; 2069 2070 KEY_FREESP(&sp); 2071 } 2072 2073 if (count == 0 || newid == 0) { 2074 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2075 return 0; 2076 } 2077 2078 return newid; 2079 } 2080 2081 /* 2082 * SADB_SPDDELETE processing 2083 * receive 2084 * <base, address(SD), policy(*)> 2085 * from the user(?), and set SADB_SASTATE_DEAD, 2086 * and send, 2087 * <base, address(SD), policy(*)> 2088 * to the ikmpd. 2089 * policy(*) including direction of policy. 2090 * 2091 * m will always be freed. 2092 */ 2093 static int 2094 key_api_spddelete(struct socket *so, struct mbuf *m, 2095 const struct sadb_msghdr *mhp) 2096 { 2097 struct sadb_x_policy *xpl0; 2098 struct secpolicyindex spidx; 2099 struct secpolicy *sp; 2100 2101 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2102 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2103 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2104 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2105 return key_senderror(so, m, EINVAL); 2106 } 2107 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2108 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2109 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2110 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2111 return key_senderror(so, m, EINVAL); 2112 } 2113 2114 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2115 2116 /* checking the direciton. */ 2117 switch (xpl0->sadb_x_policy_dir) { 2118 case IPSEC_DIR_INBOUND: 2119 case IPSEC_DIR_OUTBOUND: 2120 break; 2121 default: 2122 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2123 return key_senderror(so, m, EINVAL); 2124 } 2125 2126 /* make secindex */ 2127 key_init_spidx_bymsghdr(&spidx, mhp); 2128 2129 /* Is there SP in SPD ? */ 2130 sp = key_getsp(&spidx); 2131 if (sp == NULL) { 2132 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2133 return key_senderror(so, m, EINVAL); 2134 } 2135 2136 /* save policy id to buffer to be returned. */ 2137 xpl0->sadb_x_policy_id = sp->id; 2138 2139 key_sp_dead(sp); 2140 key_sp_unlink(sp); /* XXX jrs ordering */ 2141 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2142 2143 /* Invalidate all cached SPD pointers in the PCBs. */ 2144 ipsec_invalpcbcacheall(); 2145 2146 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2147 2148 { 2149 struct mbuf *n; 2150 2151 /* create new sadb_msg to reply. */ 2152 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2153 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2154 if (!n) 2155 return key_senderror(so, m, ENOBUFS); 2156 2157 n = key_fill_replymsg(n, 0); 2158 if (n == NULL) 2159 return key_senderror(so, m, ENOBUFS); 2160 2161 m_freem(m); 2162 key_update_used(); 2163 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2164 } 2165 } 2166 2167 /* 2168 * SADB_SPDDELETE2 processing 2169 * receive 2170 * <base, policy(*)> 2171 * from the user(?), and set SADB_SASTATE_DEAD, 2172 * and send, 2173 * <base, policy(*)> 2174 * to the ikmpd. 2175 * policy(*) including direction of policy. 2176 * 2177 * m will always be freed. 2178 */ 2179 static int 2180 key_api_spddelete2(struct socket *so, struct mbuf *m, 2181 const struct sadb_msghdr *mhp) 2182 { 2183 u_int32_t id; 2184 struct secpolicy *sp; 2185 2186 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2187 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2188 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2189 return key_senderror(so, m, EINVAL); 2190 } 2191 2192 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2193 2194 /* Is there SP in SPD ? */ 2195 sp = key_getspbyid(id); 2196 if (sp == NULL) { 2197 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2198 return key_senderror(so, m, EINVAL); 2199 } 2200 2201 key_sp_dead(sp); 2202 key_sp_unlink(sp); /* XXX jrs ordering */ 2203 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2204 sp = NULL; 2205 2206 /* Invalidate all cached SPD pointers in the PCBs. */ 2207 ipsec_invalpcbcacheall(); 2208 2209 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2210 2211 { 2212 struct mbuf *n, *nn; 2213 int off, len; 2214 2215 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 2216 2217 /* create new sadb_msg to reply. */ 2218 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2219 2220 MGETHDR(n, M_DONTWAIT, MT_DATA); 2221 if (n && len > MHLEN) { 2222 MCLGET(n, M_DONTWAIT); 2223 if ((n->m_flags & M_EXT) == 0) { 2224 m_freem(n); 2225 n = NULL; 2226 } 2227 } 2228 if (!n) 2229 return key_senderror(so, m, ENOBUFS); 2230 2231 n->m_len = len; 2232 n->m_next = NULL; 2233 off = 0; 2234 2235 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2236 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2237 2238 KASSERTMSG(off == len, "length inconsistency"); 2239 2240 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2241 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2242 if (!n->m_next) { 2243 m_freem(n); 2244 return key_senderror(so, m, ENOBUFS); 2245 } 2246 2247 n->m_pkthdr.len = 0; 2248 for (nn = n; nn; nn = nn->m_next) 2249 n->m_pkthdr.len += nn->m_len; 2250 2251 n = key_fill_replymsg(n, 0); 2252 if (n == NULL) 2253 return key_senderror(so, m, ENOBUFS); 2254 2255 m_freem(m); 2256 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2257 } 2258 } 2259 2260 /* 2261 * SADB_X_GET processing 2262 * receive 2263 * <base, policy(*)> 2264 * from the user(?), 2265 * and send, 2266 * <base, address(SD), policy> 2267 * to the ikmpd. 2268 * policy(*) including direction of policy. 2269 * 2270 * m will always be freed. 2271 */ 2272 static int 2273 key_api_spdget(struct socket *so, struct mbuf *m, 2274 const struct sadb_msghdr *mhp) 2275 { 2276 u_int32_t id; 2277 struct secpolicy *sp; 2278 struct mbuf *n; 2279 2280 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2281 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2282 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2283 return key_senderror(so, m, EINVAL); 2284 } 2285 2286 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2287 2288 /* Is there SP in SPD ? */ 2289 sp = key_getspbyid(id); 2290 if (sp == NULL) { 2291 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2292 return key_senderror(so, m, ENOENT); 2293 } 2294 2295 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2296 mhp->msg->sadb_msg_pid); 2297 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2298 if (n != NULL) { 2299 m_freem(m); 2300 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2301 } else 2302 return key_senderror(so, m, ENOBUFS); 2303 } 2304 2305 #ifdef notyet 2306 /* 2307 * SADB_X_SPDACQUIRE processing. 2308 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2309 * send 2310 * <base, policy(*)> 2311 * to KMD, and expect to receive 2312 * <base> with SADB_X_SPDACQUIRE if error occurred, 2313 * or 2314 * <base, policy> 2315 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2316 * policy(*) is without policy requests. 2317 * 2318 * 0 : succeed 2319 * others: error number 2320 */ 2321 int 2322 key_spdacquire(const struct secpolicy *sp) 2323 { 2324 struct mbuf *result = NULL, *m; 2325 struct secspacq *newspacq; 2326 int error; 2327 2328 KASSERT(sp != NULL); 2329 KASSERTMSG(sp->req == NULL, "called but there is request"); 2330 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2331 "policy mismathed. IPsec is expected"); 2332 2333 /* Get an entry to check whether sent message or not. */ 2334 newspacq = key_getspacq(&sp->spidx); 2335 if (newspacq != NULL) { 2336 if (key_blockacq_count < newspacq->count) { 2337 /* reset counter and do send message. */ 2338 newspacq->count = 0; 2339 } else { 2340 /* increment counter and do nothing. */ 2341 newspacq->count++; 2342 return 0; 2343 } 2344 } else { 2345 /* make new entry for blocking to send SADB_ACQUIRE. */ 2346 newspacq = key_newspacq(&sp->spidx); 2347 if (newspacq == NULL) 2348 return ENOBUFS; 2349 2350 /* add to acqtree */ 2351 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2352 } 2353 2354 /* create new sadb_msg to reply. */ 2355 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2356 if (!m) { 2357 error = ENOBUFS; 2358 goto fail; 2359 } 2360 result = m; 2361 2362 result->m_pkthdr.len = 0; 2363 for (m = result; m; m = m->m_next) 2364 result->m_pkthdr.len += m->m_len; 2365 2366 mtod(result, struct sadb_msg *)->sadb_msg_len = 2367 PFKEY_UNIT64(result->m_pkthdr.len); 2368 2369 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2370 2371 fail: 2372 if (result) 2373 m_freem(result); 2374 return error; 2375 } 2376 #endif /* notyet */ 2377 2378 /* 2379 * SADB_SPDFLUSH processing 2380 * receive 2381 * <base> 2382 * from the user, and free all entries in secpctree. 2383 * and send, 2384 * <base> 2385 * to the user. 2386 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2387 * 2388 * m will always be freed. 2389 */ 2390 static int 2391 key_api_spdflush(struct socket *so, struct mbuf *m, 2392 const struct sadb_msghdr *mhp) 2393 { 2394 struct sadb_msg *newmsg; 2395 struct secpolicy *sp; 2396 u_int dir; 2397 2398 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2399 return key_senderror(so, m, EINVAL); 2400 2401 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2402 struct secpolicy * nextsp; 2403 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 2404 if (sp->state == IPSEC_SPSTATE_DEAD) 2405 continue; 2406 key_sp_dead(sp); 2407 key_sp_unlink(sp); 2408 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2409 continue; 2410 } 2411 } 2412 2413 /* Invalidate all cached SPD pointers in the PCBs. */ 2414 ipsec_invalpcbcacheall(); 2415 2416 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2417 2418 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2419 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2420 return key_senderror(so, m, ENOBUFS); 2421 } 2422 2423 if (m->m_next) 2424 m_freem(m->m_next); 2425 m->m_next = NULL; 2426 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2427 newmsg = mtod(m, struct sadb_msg *); 2428 newmsg->sadb_msg_errno = 0; 2429 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2430 2431 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2432 } 2433 2434 static struct sockaddr key_src = { 2435 .sa_len = 2, 2436 .sa_family = PF_KEY, 2437 }; 2438 2439 static struct mbuf * 2440 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2441 { 2442 struct secpolicy *sp; 2443 int cnt; 2444 u_int dir; 2445 struct mbuf *m, *n, *prev; 2446 int totlen; 2447 2448 *lenp = 0; 2449 2450 /* search SPD entry and get buffer size. */ 2451 cnt = 0; 2452 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2453 LIST_FOREACH(sp, &sptree[dir], chain) { 2454 cnt++; 2455 } 2456 } 2457 2458 if (cnt == 0) { 2459 *errorp = ENOENT; 2460 return (NULL); 2461 } 2462 2463 m = NULL; 2464 prev = m; 2465 totlen = 0; 2466 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2467 LIST_FOREACH(sp, &sptree[dir], chain) { 2468 --cnt; 2469 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2470 2471 if (!n) { 2472 *errorp = ENOBUFS; 2473 if (m) 2474 m_freem(m); 2475 return (NULL); 2476 } 2477 2478 totlen += n->m_pkthdr.len; 2479 if (!m) { 2480 m = n; 2481 } else { 2482 prev->m_nextpkt = n; 2483 } 2484 prev = n; 2485 } 2486 } 2487 2488 *lenp = totlen; 2489 *errorp = 0; 2490 return (m); 2491 } 2492 2493 /* 2494 * SADB_SPDDUMP processing 2495 * receive 2496 * <base> 2497 * from the user, and dump all SP leaves 2498 * and send, 2499 * <base> ..... 2500 * to the ikmpd. 2501 * 2502 * m will always be freed. 2503 */ 2504 static int 2505 key_api_spddump(struct socket *so, struct mbuf *m0, 2506 const struct sadb_msghdr *mhp) 2507 { 2508 struct mbuf *n; 2509 int error, len; 2510 int ok, s; 2511 pid_t pid; 2512 2513 pid = mhp->msg->sadb_msg_pid; 2514 /* 2515 * If the requestor has insufficient socket-buffer space 2516 * for the entire chain, nobody gets any response to the DUMP. 2517 * XXX For now, only the requestor ever gets anything. 2518 * Moreover, if the requestor has any space at all, they receive 2519 * the entire chain, otherwise the request is refused with ENOBUFS. 2520 */ 2521 if (sbspace(&so->so_rcv) <= 0) { 2522 return key_senderror(so, m0, ENOBUFS); 2523 } 2524 2525 s = splsoftnet(); 2526 n = key_setspddump_chain(&error, &len, pid); 2527 splx(s); 2528 2529 if (n == NULL) { 2530 return key_senderror(so, m0, ENOENT); 2531 } 2532 { 2533 uint64_t *ps = PFKEY_STAT_GETREF(); 2534 ps[PFKEY_STAT_IN_TOTAL]++; 2535 ps[PFKEY_STAT_IN_BYTES] += len; 2536 PFKEY_STAT_PUTREF(); 2537 } 2538 2539 /* 2540 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2541 * The requestor receives either the entire chain, or an 2542 * error message with ENOBUFS. 2543 */ 2544 2545 /* 2546 * sbappendchainwith record takes the chain of entries, one 2547 * packet-record per SPD entry, prepends the key_src sockaddr 2548 * to each packet-record, links the sockaddr mbufs into a new 2549 * list of records, then appends the entire resulting 2550 * list to the requesting socket. 2551 */ 2552 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2553 SB_PRIO_ONESHOT_OVERFLOW); 2554 2555 if (!ok) { 2556 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2557 m_freem(n); 2558 return key_senderror(so, m0, ENOBUFS); 2559 } 2560 2561 m_freem(m0); 2562 return error; 2563 } 2564 2565 /* 2566 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2567 */ 2568 static int 2569 key_api_nat_map(struct socket *so, struct mbuf *m, 2570 const struct sadb_msghdr *mhp) 2571 { 2572 struct sadb_x_nat_t_type *type; 2573 struct sadb_x_nat_t_port *sport; 2574 struct sadb_x_nat_t_port *dport; 2575 struct sadb_address *iaddr, *raddr; 2576 struct sadb_x_nat_t_frag *frag; 2577 2578 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2579 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2580 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2581 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2582 return key_senderror(so, m, EINVAL); 2583 } 2584 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2585 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2586 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2587 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2588 return key_senderror(so, m, EINVAL); 2589 } 2590 2591 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2592 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2593 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2594 return key_senderror(so, m, EINVAL); 2595 } 2596 2597 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2598 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2599 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2600 return key_senderror(so, m, EINVAL); 2601 } 2602 2603 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2604 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2605 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2606 return key_senderror(so, m, EINVAL); 2607 } 2608 2609 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2610 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2611 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2612 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2613 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2614 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2615 2616 /* 2617 * XXX handle that, it should also contain a SA, or anything 2618 * that enable to update the SA information. 2619 */ 2620 2621 return 0; 2622 } 2623 2624 static struct mbuf * 2625 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2626 { 2627 struct mbuf *result = NULL, *m; 2628 2629 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2630 if (!m) 2631 goto fail; 2632 result = m; 2633 2634 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2635 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto); 2636 if (!m) 2637 goto fail; 2638 m_cat(result, m); 2639 2640 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2641 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto); 2642 if (!m) 2643 goto fail; 2644 m_cat(result, m); 2645 2646 m = key_sp2msg(sp); 2647 if (!m) 2648 goto fail; 2649 m_cat(result, m); 2650 2651 if ((result->m_flags & M_PKTHDR) == 0) 2652 goto fail; 2653 2654 if (result->m_len < sizeof(struct sadb_msg)) { 2655 result = m_pullup(result, sizeof(struct sadb_msg)); 2656 if (result == NULL) 2657 goto fail; 2658 } 2659 2660 result->m_pkthdr.len = 0; 2661 for (m = result; m; m = m->m_next) 2662 result->m_pkthdr.len += m->m_len; 2663 2664 mtod(result, struct sadb_msg *)->sadb_msg_len = 2665 PFKEY_UNIT64(result->m_pkthdr.len); 2666 2667 return result; 2668 2669 fail: 2670 m_freem(result); 2671 return NULL; 2672 } 2673 2674 /* 2675 * get PFKEY message length for security policy and request. 2676 */ 2677 static u_int 2678 key_getspreqmsglen(const struct secpolicy *sp) 2679 { 2680 u_int tlen; 2681 2682 tlen = sizeof(struct sadb_x_policy); 2683 2684 /* if is the policy for ipsec ? */ 2685 if (sp->policy != IPSEC_POLICY_IPSEC) 2686 return tlen; 2687 2688 /* get length of ipsec requests */ 2689 { 2690 const struct ipsecrequest *isr; 2691 int len; 2692 2693 for (isr = sp->req; isr != NULL; isr = isr->next) { 2694 len = sizeof(struct sadb_x_ipsecrequest) 2695 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 2696 2697 tlen += PFKEY_ALIGN8(len); 2698 } 2699 } 2700 2701 return tlen; 2702 } 2703 2704 /* 2705 * SADB_SPDEXPIRE processing 2706 * send 2707 * <base, address(SD), lifetime(CH), policy> 2708 * to KMD by PF_KEY. 2709 * 2710 * OUT: 0 : succeed 2711 * others : error number 2712 */ 2713 static int 2714 key_spdexpire(struct secpolicy *sp) 2715 { 2716 int s; 2717 struct mbuf *result = NULL, *m; 2718 int len; 2719 int error = -1; 2720 struct sadb_lifetime *lt; 2721 2722 /* XXX: Why do we lock ? */ 2723 s = splsoftnet(); /*called from softclock()*/ 2724 2725 KASSERT(sp != NULL); 2726 2727 /* set msg header */ 2728 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2729 if (!m) { 2730 error = ENOBUFS; 2731 goto fail; 2732 } 2733 result = m; 2734 2735 /* create lifetime extension (current and hard) */ 2736 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2737 m = key_alloc_mbuf(len); 2738 if (!m || m->m_next) { /*XXX*/ 2739 if (m) 2740 m_freem(m); 2741 error = ENOBUFS; 2742 goto fail; 2743 } 2744 memset(mtod(m, void *), 0, len); 2745 lt = mtod(m, struct sadb_lifetime *); 2746 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2747 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2748 lt->sadb_lifetime_allocations = 0; 2749 lt->sadb_lifetime_bytes = 0; 2750 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2751 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2752 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2753 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2754 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2755 lt->sadb_lifetime_allocations = 0; 2756 lt->sadb_lifetime_bytes = 0; 2757 lt->sadb_lifetime_addtime = sp->lifetime; 2758 lt->sadb_lifetime_usetime = sp->validtime; 2759 m_cat(result, m); 2760 2761 /* set sadb_address for source */ 2762 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 2763 sp->spidx.prefs, sp->spidx.ul_proto); 2764 if (!m) { 2765 error = ENOBUFS; 2766 goto fail; 2767 } 2768 m_cat(result, m); 2769 2770 /* set sadb_address for destination */ 2771 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 2772 sp->spidx.prefd, sp->spidx.ul_proto); 2773 if (!m) { 2774 error = ENOBUFS; 2775 goto fail; 2776 } 2777 m_cat(result, m); 2778 2779 /* set secpolicy */ 2780 m = key_sp2msg(sp); 2781 if (!m) { 2782 error = ENOBUFS; 2783 goto fail; 2784 } 2785 m_cat(result, m); 2786 2787 if ((result->m_flags & M_PKTHDR) == 0) { 2788 error = EINVAL; 2789 goto fail; 2790 } 2791 2792 if (result->m_len < sizeof(struct sadb_msg)) { 2793 result = m_pullup(result, sizeof(struct sadb_msg)); 2794 if (result == NULL) { 2795 error = ENOBUFS; 2796 goto fail; 2797 } 2798 } 2799 2800 result->m_pkthdr.len = 0; 2801 for (m = result; m; m = m->m_next) 2802 result->m_pkthdr.len += m->m_len; 2803 2804 mtod(result, struct sadb_msg *)->sadb_msg_len = 2805 PFKEY_UNIT64(result->m_pkthdr.len); 2806 2807 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2808 2809 fail: 2810 if (result) 2811 m_freem(result); 2812 splx(s); 2813 return error; 2814 } 2815 2816 /* %%% SAD management */ 2817 /* 2818 * allocating a memory for new SA head, and copy from the values of mhp. 2819 * OUT: NULL : failure due to the lack of memory. 2820 * others : pointer to new SA head. 2821 */ 2822 static struct secashead * 2823 key_newsah(const struct secasindex *saidx) 2824 { 2825 struct secashead *newsah; 2826 int i; 2827 2828 KASSERT(saidx != NULL); 2829 2830 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 2831 for (i = 0; i < __arraycount(newsah->savtree); i++) 2832 LIST_INIT(&newsah->savtree[i]); 2833 newsah->saidx = *saidx; 2834 2835 /* add to saidxtree */ 2836 newsah->state = SADB_SASTATE_MATURE; 2837 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2838 2839 return newsah; 2840 } 2841 2842 /* 2843 * delete SA index and all SA registerd. 2844 */ 2845 static void 2846 key_delsah(struct secashead *sah) 2847 { 2848 struct secasvar *sav, *nextsav; 2849 u_int state; 2850 int s; 2851 int zombie = 0; 2852 2853 KASSERT(!cpu_softintr_p()); 2854 KASSERT(sah != NULL); 2855 2856 s = splsoftnet(); 2857 2858 /* searching all SA registerd in the secindex. */ 2859 SASTATE_ANY_FOREACH(state) { 2860 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2861 if (sav->refcnt == 0) { 2862 /* sanity check */ 2863 KEY_CHKSASTATE(state, sav->state); 2864 KEY_FREESAV(&sav); 2865 } else { 2866 /* give up to delete this sa */ 2867 zombie++; 2868 } 2869 } 2870 } 2871 2872 /* don't delete sah only if there are savs. */ 2873 if (zombie) { 2874 splx(s); 2875 return; 2876 } 2877 2878 rtcache_free(&sah->sa_route); 2879 2880 /* remove from tree of SA index */ 2881 KASSERT(__LIST_CHAINED(sah)); 2882 LIST_REMOVE(sah, chain); 2883 2884 if (sah->idents != NULL) 2885 kmem_free(sah->idents, sah->idents_len); 2886 if (sah->identd != NULL) 2887 kmem_free(sah->identd, sah->identd_len); 2888 2889 kmem_free(sah, sizeof(*sah)); 2890 2891 splx(s); 2892 return; 2893 } 2894 2895 /* 2896 * allocating a new SA with LARVAL state. 2897 * key_api_add() and key_api_getspi() call, 2898 * and copy the values of mhp into new buffer. 2899 * When SAD message type is GETSPI: 2900 * to set sequence number from acq_seq++, 2901 * to set zero to SPI. 2902 * not to call key_setsava(). 2903 * OUT: NULL : fail 2904 * others : pointer to new secasvar. 2905 * 2906 * does not modify mbuf. does not free mbuf on error. 2907 */ 2908 static struct secasvar * 2909 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2910 int *errp, const char* where, int tag) 2911 { 2912 struct secasvar *newsav; 2913 const struct sadb_sa *xsa; 2914 2915 KASSERT(!cpu_softintr_p()); 2916 KASSERT(m != NULL); 2917 KASSERT(mhp != NULL); 2918 KASSERT(mhp->msg != NULL); 2919 2920 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 2921 2922 switch (mhp->msg->sadb_msg_type) { 2923 case SADB_GETSPI: 2924 newsav->spi = 0; 2925 2926 #ifdef IPSEC_DOSEQCHECK 2927 /* sync sequence number */ 2928 if (mhp->msg->sadb_msg_seq == 0) 2929 newsav->seq = 2930 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2931 else 2932 #endif 2933 newsav->seq = mhp->msg->sadb_msg_seq; 2934 break; 2935 2936 case SADB_ADD: 2937 /* sanity check */ 2938 if (mhp->ext[SADB_EXT_SA] == NULL) { 2939 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2940 *errp = EINVAL; 2941 goto error; 2942 } 2943 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2944 newsav->spi = xsa->sadb_sa_spi; 2945 newsav->seq = mhp->msg->sadb_msg_seq; 2946 break; 2947 default: 2948 *errp = EINVAL; 2949 goto error; 2950 } 2951 2952 /* copy sav values */ 2953 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2954 *errp = key_setsaval(newsav, m, mhp); 2955 if (*errp) 2956 goto error; 2957 } 2958 2959 /* reset created */ 2960 newsav->created = time_uptime; 2961 newsav->pid = mhp->msg->sadb_msg_pid; 2962 2963 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2964 "DP from %s:%u return SA:%p\n", where, tag, newsav); 2965 return newsav; 2966 2967 error: 2968 KASSERT(*errp != 0); 2969 kmem_free(newsav, sizeof(*newsav)); 2970 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2971 "DP from %s:%u return SA:NULL\n", where, tag); 2972 return NULL; 2973 } 2974 2975 2976 static void 2977 key_clear_xform(struct secasvar *sav) 2978 { 2979 2980 /* 2981 * Cleanup xform state. Note that zeroize'ing causes the 2982 * keys to be cleared; otherwise we must do it ourself. 2983 */ 2984 if (sav->tdb_xform != NULL) { 2985 sav->tdb_xform->xf_zeroize(sav); 2986 sav->tdb_xform = NULL; 2987 } else { 2988 if (sav->key_auth != NULL) 2989 explicit_memset(_KEYBUF(sav->key_auth), 0, 2990 _KEYLEN(sav->key_auth)); 2991 if (sav->key_enc != NULL) 2992 explicit_memset(_KEYBUF(sav->key_enc), 0, 2993 _KEYLEN(sav->key_enc)); 2994 } 2995 } 2996 2997 /* 2998 * free() SA variable entry. 2999 */ 3000 static void 3001 key_delsav(struct secasvar *sav) 3002 { 3003 3004 KASSERT(sav != NULL); 3005 KASSERTMSG(sav->refcnt == 0, "reference count %u > 0", sav->refcnt); 3006 3007 key_clear_xform(sav); 3008 key_freesaval(sav); 3009 kmem_intr_free(sav, sizeof(*sav)); 3010 3011 return; 3012 } 3013 3014 /* 3015 * search SAD. 3016 * OUT: 3017 * NULL : not found 3018 * others : found, pointer to a SA. 3019 */ 3020 static struct secashead * 3021 key_getsah(const struct secasindex *saidx, int flag) 3022 { 3023 struct secashead *sah; 3024 3025 LIST_FOREACH(sah, &sahtree, chain) { 3026 if (sah->state == SADB_SASTATE_DEAD) 3027 continue; 3028 if (key_saidx_match(&sah->saidx, saidx, flag)) 3029 return sah; 3030 } 3031 3032 return NULL; 3033 } 3034 3035 /* 3036 * check not to be duplicated SPI. 3037 * NOTE: this function is too slow due to searching all SAD. 3038 * OUT: 3039 * NULL : not found 3040 * others : found, pointer to a SA. 3041 */ 3042 static struct secasvar * 3043 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3044 { 3045 struct secashead *sah; 3046 struct secasvar *sav; 3047 3048 /* check address family */ 3049 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3050 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3051 return NULL; 3052 } 3053 3054 /* check all SAD */ 3055 LIST_FOREACH(sah, &sahtree, chain) { 3056 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3057 continue; 3058 sav = key_getsavbyspi(sah, spi); 3059 if (sav != NULL) 3060 return sav; 3061 } 3062 3063 return NULL; 3064 } 3065 3066 /* 3067 * search SAD litmited alive SA, protocol, SPI. 3068 * OUT: 3069 * NULL : not found 3070 * others : found, pointer to a SA. 3071 */ 3072 static struct secasvar * 3073 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3074 { 3075 struct secasvar *sav; 3076 u_int state; 3077 3078 /* search all status */ 3079 SASTATE_ALIVE_FOREACH(state) { 3080 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3081 3082 /* sanity check */ 3083 if (sav->state != state) { 3084 IPSECLOG(LOG_DEBUG, 3085 "invalid sav->state (queue: %d SA: %d)\n", 3086 state, sav->state); 3087 continue; 3088 } 3089 3090 if (sav->spi == spi) 3091 return sav; 3092 } 3093 } 3094 3095 return NULL; 3096 } 3097 3098 /* 3099 * Free allocated data to member variables of sav: 3100 * sav->replay, sav->key_* and sav->lft_*. 3101 */ 3102 static void 3103 key_freesaval(struct secasvar *sav) 3104 { 3105 3106 if (sav->replay != NULL) { 3107 kmem_intr_free(sav->replay, sav->replay_len); 3108 sav->replay = NULL; 3109 sav->replay_len = 0; 3110 } 3111 if (sav->key_auth != NULL) { 3112 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3113 sav->key_auth = NULL; 3114 sav->key_auth_len = 0; 3115 } 3116 if (sav->key_enc != NULL) { 3117 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3118 sav->key_enc = NULL; 3119 sav->key_enc_len = 0; 3120 } 3121 if (sav->lft_c != NULL) { 3122 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3123 sav->lft_c = NULL; 3124 } 3125 if (sav->lft_h != NULL) { 3126 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3127 sav->lft_h = NULL; 3128 } 3129 if (sav->lft_s != NULL) { 3130 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3131 sav->lft_s = NULL; 3132 } 3133 } 3134 3135 /* 3136 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3137 * You must update these if need. 3138 * OUT: 0: success. 3139 * !0: failure. 3140 * 3141 * does not modify mbuf. does not free mbuf on error. 3142 */ 3143 static int 3144 key_setsaval(struct secasvar *sav, struct mbuf *m, 3145 const struct sadb_msghdr *mhp) 3146 { 3147 int error = 0; 3148 3149 KASSERT(!cpu_softintr_p()); 3150 KASSERT(m != NULL); 3151 KASSERT(mhp != NULL); 3152 KASSERT(mhp->msg != NULL); 3153 3154 /* We shouldn't initialize sav variables while someone uses it. */ 3155 KASSERT(sav->refcnt == 0); 3156 3157 /* initialization */ 3158 key_freesaval(sav); 3159 sav->tdb_xform = NULL; /* transform */ 3160 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3161 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3162 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3163 sav->natt_type = 0; 3164 sav->esp_frag = 0; 3165 3166 /* SA */ 3167 if (mhp->ext[SADB_EXT_SA] != NULL) { 3168 const struct sadb_sa *sa0; 3169 3170 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3171 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3172 error = EINVAL; 3173 goto fail; 3174 } 3175 3176 sav->alg_auth = sa0->sadb_sa_auth; 3177 sav->alg_enc = sa0->sadb_sa_encrypt; 3178 sav->flags = sa0->sadb_sa_flags; 3179 3180 /* replay window */ 3181 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3182 size_t len = sizeof(struct secreplay) + 3183 sa0->sadb_sa_replay; 3184 sav->replay = kmem_zalloc(len, KM_SLEEP); 3185 sav->replay_len = len; 3186 if (sa0->sadb_sa_replay != 0) 3187 sav->replay->bitmap = (char*)(sav->replay+1); 3188 sav->replay->wsize = sa0->sadb_sa_replay; 3189 } 3190 } 3191 3192 /* Authentication keys */ 3193 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3194 const struct sadb_key *key0; 3195 int len; 3196 3197 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3198 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3199 3200 error = 0; 3201 if (len < sizeof(*key0)) { 3202 error = EINVAL; 3203 goto fail; 3204 } 3205 switch (mhp->msg->sadb_msg_satype) { 3206 case SADB_SATYPE_AH: 3207 case SADB_SATYPE_ESP: 3208 case SADB_X_SATYPE_TCPSIGNATURE: 3209 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3210 sav->alg_auth != SADB_X_AALG_NULL) 3211 error = EINVAL; 3212 break; 3213 case SADB_X_SATYPE_IPCOMP: 3214 default: 3215 error = EINVAL; 3216 break; 3217 } 3218 if (error) { 3219 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3220 goto fail; 3221 } 3222 3223 sav->key_auth = key_newbuf(key0, len); 3224 sav->key_auth_len = len; 3225 } 3226 3227 /* Encryption key */ 3228 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3229 const struct sadb_key *key0; 3230 int len; 3231 3232 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3233 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3234 3235 error = 0; 3236 if (len < sizeof(*key0)) { 3237 error = EINVAL; 3238 goto fail; 3239 } 3240 switch (mhp->msg->sadb_msg_satype) { 3241 case SADB_SATYPE_ESP: 3242 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3243 sav->alg_enc != SADB_EALG_NULL) { 3244 error = EINVAL; 3245 break; 3246 } 3247 sav->key_enc = key_newbuf(key0, len); 3248 sav->key_enc_len = len; 3249 break; 3250 case SADB_X_SATYPE_IPCOMP: 3251 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3252 error = EINVAL; 3253 sav->key_enc = NULL; /*just in case*/ 3254 break; 3255 case SADB_SATYPE_AH: 3256 case SADB_X_SATYPE_TCPSIGNATURE: 3257 default: 3258 error = EINVAL; 3259 break; 3260 } 3261 if (error) { 3262 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3263 goto fail; 3264 } 3265 } 3266 3267 /* set iv */ 3268 sav->ivlen = 0; 3269 3270 switch (mhp->msg->sadb_msg_satype) { 3271 case SADB_SATYPE_AH: 3272 error = xform_init(sav, XF_AH); 3273 break; 3274 case SADB_SATYPE_ESP: 3275 error = xform_init(sav, XF_ESP); 3276 break; 3277 case SADB_X_SATYPE_IPCOMP: 3278 error = xform_init(sav, XF_IPCOMP); 3279 break; 3280 case SADB_X_SATYPE_TCPSIGNATURE: 3281 error = xform_init(sav, XF_TCPSIGNATURE); 3282 break; 3283 } 3284 if (error) { 3285 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3286 mhp->msg->sadb_msg_satype); 3287 goto fail; 3288 } 3289 3290 /* reset created */ 3291 sav->created = time_uptime; 3292 3293 /* make lifetime for CURRENT */ 3294 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3295 3296 sav->lft_c->sadb_lifetime_len = 3297 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3298 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3299 sav->lft_c->sadb_lifetime_allocations = 0; 3300 sav->lft_c->sadb_lifetime_bytes = 0; 3301 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3302 sav->lft_c->sadb_lifetime_usetime = 0; 3303 3304 /* lifetimes for HARD and SOFT */ 3305 { 3306 const struct sadb_lifetime *lft0; 3307 3308 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3309 if (lft0 != NULL) { 3310 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3311 error = EINVAL; 3312 goto fail; 3313 } 3314 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3315 } 3316 3317 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3318 if (lft0 != NULL) { 3319 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3320 error = EINVAL; 3321 goto fail; 3322 } 3323 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3324 /* to be initialize ? */ 3325 } 3326 } 3327 3328 return 0; 3329 3330 fail: 3331 key_clear_xform(sav); 3332 key_freesaval(sav); 3333 3334 return error; 3335 } 3336 3337 /* 3338 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3339 * OUT: 0: valid 3340 * other: errno 3341 */ 3342 static int 3343 key_init_xform(struct secasvar *sav) 3344 { 3345 int error; 3346 3347 /* We shouldn't initialize sav variables while someone uses it. */ 3348 KASSERT(sav->refcnt == 0); 3349 3350 /* check SPI value */ 3351 switch (sav->sah->saidx.proto) { 3352 case IPPROTO_ESP: 3353 case IPPROTO_AH: 3354 if (ntohl(sav->spi) <= 255) { 3355 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3356 (u_int32_t)ntohl(sav->spi)); 3357 return EINVAL; 3358 } 3359 break; 3360 } 3361 3362 /* check satype */ 3363 switch (sav->sah->saidx.proto) { 3364 case IPPROTO_ESP: 3365 /* check flags */ 3366 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3367 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3368 IPSECLOG(LOG_DEBUG, 3369 "invalid flag (derived) given to old-esp.\n"); 3370 return EINVAL; 3371 } 3372 error = xform_init(sav, XF_ESP); 3373 break; 3374 case IPPROTO_AH: 3375 /* check flags */ 3376 if (sav->flags & SADB_X_EXT_DERIV) { 3377 IPSECLOG(LOG_DEBUG, 3378 "invalid flag (derived) given to AH SA.\n"); 3379 return EINVAL; 3380 } 3381 if (sav->alg_enc != SADB_EALG_NONE) { 3382 IPSECLOG(LOG_DEBUG, 3383 "protocol and algorithm mismated.\n"); 3384 return(EINVAL); 3385 } 3386 error = xform_init(sav, XF_AH); 3387 break; 3388 case IPPROTO_IPCOMP: 3389 if (sav->alg_auth != SADB_AALG_NONE) { 3390 IPSECLOG(LOG_DEBUG, 3391 "protocol and algorithm mismated.\n"); 3392 return(EINVAL); 3393 } 3394 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3395 && ntohl(sav->spi) >= 0x10000) { 3396 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3397 return(EINVAL); 3398 } 3399 error = xform_init(sav, XF_IPCOMP); 3400 break; 3401 case IPPROTO_TCP: 3402 if (sav->alg_enc != SADB_EALG_NONE) { 3403 IPSECLOG(LOG_DEBUG, 3404 "protocol and algorithm mismated.\n"); 3405 return(EINVAL); 3406 } 3407 error = xform_init(sav, XF_TCPSIGNATURE); 3408 break; 3409 default: 3410 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3411 error = EPROTONOSUPPORT; 3412 break; 3413 } 3414 3415 return error; 3416 } 3417 3418 /* 3419 * subroutine for SADB_GET and SADB_DUMP. 3420 */ 3421 static struct mbuf * 3422 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3423 u_int32_t seq, u_int32_t pid) 3424 { 3425 struct mbuf *result = NULL, *tres = NULL, *m; 3426 int l = 0; 3427 int i; 3428 void *p; 3429 struct sadb_lifetime lt; 3430 int dumporder[] = { 3431 SADB_EXT_SA, SADB_X_EXT_SA2, 3432 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3433 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3434 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3435 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3436 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3437 SADB_X_EXT_NAT_T_TYPE, 3438 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3439 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3440 SADB_X_EXT_NAT_T_FRAG, 3441 3442 }; 3443 3444 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3445 if (m == NULL) 3446 goto fail; 3447 result = m; 3448 3449 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3450 m = NULL; 3451 p = NULL; 3452 switch (dumporder[i]) { 3453 case SADB_EXT_SA: 3454 m = key_setsadbsa(sav); 3455 break; 3456 3457 case SADB_X_EXT_SA2: 3458 m = key_setsadbxsa2(sav->sah->saidx.mode, 3459 sav->replay ? sav->replay->count : 0, 3460 sav->sah->saidx.reqid); 3461 break; 3462 3463 case SADB_EXT_ADDRESS_SRC: 3464 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3465 &sav->sah->saidx.src.sa, 3466 FULLMASK, IPSEC_ULPROTO_ANY); 3467 break; 3468 3469 case SADB_EXT_ADDRESS_DST: 3470 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3471 &sav->sah->saidx.dst.sa, 3472 FULLMASK, IPSEC_ULPROTO_ANY); 3473 break; 3474 3475 case SADB_EXT_KEY_AUTH: 3476 if (!sav->key_auth) 3477 continue; 3478 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3479 p = sav->key_auth; 3480 break; 3481 3482 case SADB_EXT_KEY_ENCRYPT: 3483 if (!sav->key_enc) 3484 continue; 3485 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3486 p = sav->key_enc; 3487 break; 3488 3489 case SADB_EXT_LIFETIME_CURRENT: 3490 if (!sav->lft_c) 3491 continue; 3492 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3493 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3494 lt.sadb_lifetime_addtime += time_second - time_uptime; 3495 lt.sadb_lifetime_usetime += time_second - time_uptime; 3496 p = < 3497 break; 3498 3499 case SADB_EXT_LIFETIME_HARD: 3500 if (!sav->lft_h) 3501 continue; 3502 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3503 p = sav->lft_h; 3504 break; 3505 3506 case SADB_EXT_LIFETIME_SOFT: 3507 if (!sav->lft_s) 3508 continue; 3509 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3510 p = sav->lft_s; 3511 break; 3512 3513 case SADB_X_EXT_NAT_T_TYPE: 3514 m = key_setsadbxtype(sav->natt_type); 3515 break; 3516 3517 case SADB_X_EXT_NAT_T_DPORT: 3518 if (sav->natt_type == 0) 3519 continue; 3520 m = key_setsadbxport( 3521 key_portfromsaddr(&sav->sah->saidx.dst), 3522 SADB_X_EXT_NAT_T_DPORT); 3523 break; 3524 3525 case SADB_X_EXT_NAT_T_SPORT: 3526 if (sav->natt_type == 0) 3527 continue; 3528 m = key_setsadbxport( 3529 key_portfromsaddr(&sav->sah->saidx.src), 3530 SADB_X_EXT_NAT_T_SPORT); 3531 break; 3532 3533 case SADB_X_EXT_NAT_T_FRAG: 3534 /* don't send frag info if not set */ 3535 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3536 continue; 3537 m = key_setsadbxfrag(sav->esp_frag); 3538 break; 3539 3540 case SADB_X_EXT_NAT_T_OAI: 3541 case SADB_X_EXT_NAT_T_OAR: 3542 continue; 3543 3544 case SADB_EXT_ADDRESS_PROXY: 3545 case SADB_EXT_IDENTITY_SRC: 3546 case SADB_EXT_IDENTITY_DST: 3547 /* XXX: should we brought from SPD ? */ 3548 case SADB_EXT_SENSITIVITY: 3549 default: 3550 continue; 3551 } 3552 3553 KASSERT(!(m && p)); 3554 if (!m && !p) 3555 goto fail; 3556 if (p && tres) { 3557 M_PREPEND(tres, l, M_DONTWAIT); 3558 if (!tres) 3559 goto fail; 3560 memcpy(mtod(tres, void *), p, l); 3561 continue; 3562 } 3563 if (p) { 3564 m = key_alloc_mbuf(l); 3565 if (!m) 3566 goto fail; 3567 m_copyback(m, 0, l, p); 3568 } 3569 3570 if (tres) 3571 m_cat(m, tres); 3572 tres = m; 3573 } 3574 3575 m_cat(result, tres); 3576 tres = NULL; /* avoid free on error below */ 3577 3578 if (result->m_len < sizeof(struct sadb_msg)) { 3579 result = m_pullup(result, sizeof(struct sadb_msg)); 3580 if (result == NULL) 3581 goto fail; 3582 } 3583 3584 result->m_pkthdr.len = 0; 3585 for (m = result; m; m = m->m_next) 3586 result->m_pkthdr.len += m->m_len; 3587 3588 mtod(result, struct sadb_msg *)->sadb_msg_len = 3589 PFKEY_UNIT64(result->m_pkthdr.len); 3590 3591 return result; 3592 3593 fail: 3594 m_freem(result); 3595 m_freem(tres); 3596 return NULL; 3597 } 3598 3599 3600 /* 3601 * set a type in sadb_x_nat_t_type 3602 */ 3603 static struct mbuf * 3604 key_setsadbxtype(u_int16_t type) 3605 { 3606 struct mbuf *m; 3607 size_t len; 3608 struct sadb_x_nat_t_type *p; 3609 3610 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3611 3612 m = key_alloc_mbuf(len); 3613 if (!m || m->m_next) { /*XXX*/ 3614 if (m) 3615 m_freem(m); 3616 return NULL; 3617 } 3618 3619 p = mtod(m, struct sadb_x_nat_t_type *); 3620 3621 memset(p, 0, len); 3622 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3623 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3624 p->sadb_x_nat_t_type_type = type; 3625 3626 return m; 3627 } 3628 /* 3629 * set a port in sadb_x_nat_t_port. port is in network order 3630 */ 3631 static struct mbuf * 3632 key_setsadbxport(u_int16_t port, u_int16_t type) 3633 { 3634 struct mbuf *m; 3635 size_t len; 3636 struct sadb_x_nat_t_port *p; 3637 3638 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3639 3640 m = key_alloc_mbuf(len); 3641 if (!m || m->m_next) { /*XXX*/ 3642 if (m) 3643 m_freem(m); 3644 return NULL; 3645 } 3646 3647 p = mtod(m, struct sadb_x_nat_t_port *); 3648 3649 memset(p, 0, len); 3650 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3651 p->sadb_x_nat_t_port_exttype = type; 3652 p->sadb_x_nat_t_port_port = port; 3653 3654 return m; 3655 } 3656 3657 /* 3658 * set fragmentation info in sadb_x_nat_t_frag 3659 */ 3660 static struct mbuf * 3661 key_setsadbxfrag(u_int16_t flen) 3662 { 3663 struct mbuf *m; 3664 size_t len; 3665 struct sadb_x_nat_t_frag *p; 3666 3667 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3668 3669 m = key_alloc_mbuf(len); 3670 if (!m || m->m_next) { /*XXX*/ 3671 if (m) 3672 m_freem(m); 3673 return NULL; 3674 } 3675 3676 p = mtod(m, struct sadb_x_nat_t_frag *); 3677 3678 memset(p, 0, len); 3679 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3680 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3681 p->sadb_x_nat_t_frag_fraglen = flen; 3682 3683 return m; 3684 } 3685 3686 /* 3687 * Get port from sockaddr, port is in network order 3688 */ 3689 u_int16_t 3690 key_portfromsaddr(const union sockaddr_union *saddr) 3691 { 3692 u_int16_t port; 3693 3694 switch (saddr->sa.sa_family) { 3695 case AF_INET: { 3696 port = saddr->sin.sin_port; 3697 break; 3698 } 3699 #ifdef INET6 3700 case AF_INET6: { 3701 port = saddr->sin6.sin6_port; 3702 break; 3703 } 3704 #endif 3705 default: 3706 printf("%s: unexpected address family\n", __func__); 3707 port = 0; 3708 break; 3709 } 3710 3711 return port; 3712 } 3713 3714 3715 /* 3716 * Set port is struct sockaddr. port is in network order 3717 */ 3718 static void 3719 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3720 { 3721 switch (saddr->sa.sa_family) { 3722 case AF_INET: { 3723 saddr->sin.sin_port = port; 3724 break; 3725 } 3726 #ifdef INET6 3727 case AF_INET6: { 3728 saddr->sin6.sin6_port = port; 3729 break; 3730 } 3731 #endif 3732 default: 3733 printf("%s: unexpected address family %d\n", __func__, 3734 saddr->sa.sa_family); 3735 break; 3736 } 3737 3738 return; 3739 } 3740 3741 /* 3742 * Safety check sa_len 3743 */ 3744 static int 3745 key_checksalen(const union sockaddr_union *saddr) 3746 { 3747 switch (saddr->sa.sa_family) { 3748 case AF_INET: 3749 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3750 return -1; 3751 break; 3752 #ifdef INET6 3753 case AF_INET6: 3754 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3755 return -1; 3756 break; 3757 #endif 3758 default: 3759 printf("%s: unexpected sa_family %d\n", __func__, 3760 saddr->sa.sa_family); 3761 return -1; 3762 break; 3763 } 3764 return 0; 3765 } 3766 3767 3768 /* 3769 * set data into sadb_msg. 3770 */ 3771 static struct mbuf * 3772 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3773 u_int32_t seq, pid_t pid, u_int16_t reserved) 3774 { 3775 struct mbuf *m; 3776 struct sadb_msg *p; 3777 int len; 3778 3779 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 3780 3781 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3782 3783 MGETHDR(m, M_DONTWAIT, MT_DATA); 3784 if (m && len > MHLEN) { 3785 MCLGET(m, M_DONTWAIT); 3786 if ((m->m_flags & M_EXT) == 0) { 3787 m_freem(m); 3788 m = NULL; 3789 } 3790 } 3791 if (!m) 3792 return NULL; 3793 m->m_pkthdr.len = m->m_len = len; 3794 m->m_next = NULL; 3795 3796 p = mtod(m, struct sadb_msg *); 3797 3798 memset(p, 0, len); 3799 p->sadb_msg_version = PF_KEY_V2; 3800 p->sadb_msg_type = type; 3801 p->sadb_msg_errno = 0; 3802 p->sadb_msg_satype = satype; 3803 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3804 p->sadb_msg_reserved = reserved; 3805 p->sadb_msg_seq = seq; 3806 p->sadb_msg_pid = (u_int32_t)pid; 3807 3808 return m; 3809 } 3810 3811 /* 3812 * copy secasvar data into sadb_address. 3813 */ 3814 static struct mbuf * 3815 key_setsadbsa(struct secasvar *sav) 3816 { 3817 struct mbuf *m; 3818 struct sadb_sa *p; 3819 int len; 3820 3821 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3822 m = key_alloc_mbuf(len); 3823 if (!m || m->m_next) { /*XXX*/ 3824 if (m) 3825 m_freem(m); 3826 return NULL; 3827 } 3828 3829 p = mtod(m, struct sadb_sa *); 3830 3831 memset(p, 0, len); 3832 p->sadb_sa_len = PFKEY_UNIT64(len); 3833 p->sadb_sa_exttype = SADB_EXT_SA; 3834 p->sadb_sa_spi = sav->spi; 3835 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3836 p->sadb_sa_state = sav->state; 3837 p->sadb_sa_auth = sav->alg_auth; 3838 p->sadb_sa_encrypt = sav->alg_enc; 3839 p->sadb_sa_flags = sav->flags; 3840 3841 return m; 3842 } 3843 3844 /* 3845 * set data into sadb_address. 3846 */ 3847 static struct mbuf * 3848 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3849 u_int8_t prefixlen, u_int16_t ul_proto) 3850 { 3851 struct mbuf *m; 3852 struct sadb_address *p; 3853 size_t len; 3854 3855 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3856 PFKEY_ALIGN8(saddr->sa_len); 3857 m = key_alloc_mbuf(len); 3858 if (!m || m->m_next) { /*XXX*/ 3859 if (m) 3860 m_freem(m); 3861 return NULL; 3862 } 3863 3864 p = mtod(m, struct sadb_address *); 3865 3866 memset(p, 0, len); 3867 p->sadb_address_len = PFKEY_UNIT64(len); 3868 p->sadb_address_exttype = exttype; 3869 p->sadb_address_proto = ul_proto; 3870 if (prefixlen == FULLMASK) { 3871 switch (saddr->sa_family) { 3872 case AF_INET: 3873 prefixlen = sizeof(struct in_addr) << 3; 3874 break; 3875 case AF_INET6: 3876 prefixlen = sizeof(struct in6_addr) << 3; 3877 break; 3878 default: 3879 ; /*XXX*/ 3880 } 3881 } 3882 p->sadb_address_prefixlen = prefixlen; 3883 p->sadb_address_reserved = 0; 3884 3885 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3886 saddr, saddr->sa_len); 3887 3888 return m; 3889 } 3890 3891 #if 0 3892 /* 3893 * set data into sadb_ident. 3894 */ 3895 static struct mbuf * 3896 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3897 void *string, int stringlen, u_int64_t id) 3898 { 3899 struct mbuf *m; 3900 struct sadb_ident *p; 3901 size_t len; 3902 3903 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 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_ident *); 3912 3913 memset(p, 0, len); 3914 p->sadb_ident_len = PFKEY_UNIT64(len); 3915 p->sadb_ident_exttype = exttype; 3916 p->sadb_ident_type = idtype; 3917 p->sadb_ident_reserved = 0; 3918 p->sadb_ident_id = id; 3919 3920 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3921 string, stringlen); 3922 3923 return m; 3924 } 3925 #endif 3926 3927 /* 3928 * set data into sadb_x_sa2. 3929 */ 3930 static struct mbuf * 3931 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 3932 { 3933 struct mbuf *m; 3934 struct sadb_x_sa2 *p; 3935 size_t len; 3936 3937 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3938 m = key_alloc_mbuf(len); 3939 if (!m || m->m_next) { /*XXX*/ 3940 if (m) 3941 m_freem(m); 3942 return NULL; 3943 } 3944 3945 p = mtod(m, struct sadb_x_sa2 *); 3946 3947 memset(p, 0, len); 3948 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3949 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3950 p->sadb_x_sa2_mode = mode; 3951 p->sadb_x_sa2_reserved1 = 0; 3952 p->sadb_x_sa2_reserved2 = 0; 3953 p->sadb_x_sa2_sequence = seq; 3954 p->sadb_x_sa2_reqid = reqid; 3955 3956 return m; 3957 } 3958 3959 /* 3960 * set data into sadb_x_policy 3961 */ 3962 static struct mbuf * 3963 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3964 { 3965 struct mbuf *m; 3966 struct sadb_x_policy *p; 3967 size_t len; 3968 3969 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3970 m = key_alloc_mbuf(len); 3971 if (!m || m->m_next) { /*XXX*/ 3972 if (m) 3973 m_freem(m); 3974 return NULL; 3975 } 3976 3977 p = mtod(m, struct sadb_x_policy *); 3978 3979 memset(p, 0, len); 3980 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3981 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3982 p->sadb_x_policy_type = type; 3983 p->sadb_x_policy_dir = dir; 3984 p->sadb_x_policy_id = id; 3985 3986 return m; 3987 } 3988 3989 /* %%% utilities */ 3990 /* 3991 * copy a buffer into the new buffer allocated. 3992 */ 3993 static void * 3994 key_newbuf(const void *src, u_int len) 3995 { 3996 void *new; 3997 3998 new = kmem_alloc(len, KM_SLEEP); 3999 memcpy(new, src, len); 4000 4001 return new; 4002 } 4003 4004 /* compare my own address 4005 * OUT: 1: true, i.e. my address. 4006 * 0: false 4007 */ 4008 int 4009 key_ismyaddr(const struct sockaddr *sa) 4010 { 4011 #ifdef INET 4012 const struct sockaddr_in *sin; 4013 const struct in_ifaddr *ia; 4014 int s; 4015 #endif 4016 4017 KASSERT(sa != NULL); 4018 4019 switch (sa->sa_family) { 4020 #ifdef INET 4021 case AF_INET: 4022 sin = (const struct sockaddr_in *)sa; 4023 s = pserialize_read_enter(); 4024 IN_ADDRLIST_READER_FOREACH(ia) { 4025 if (sin->sin_family == ia->ia_addr.sin_family && 4026 sin->sin_len == ia->ia_addr.sin_len && 4027 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4028 { 4029 pserialize_read_exit(s); 4030 return 1; 4031 } 4032 } 4033 pserialize_read_exit(s); 4034 break; 4035 #endif 4036 #ifdef INET6 4037 case AF_INET6: 4038 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4039 #endif 4040 } 4041 4042 return 0; 4043 } 4044 4045 #ifdef INET6 4046 /* 4047 * compare my own address for IPv6. 4048 * 1: ours 4049 * 0: other 4050 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4051 */ 4052 #include <netinet6/in6_var.h> 4053 4054 static int 4055 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4056 { 4057 struct in6_ifaddr *ia; 4058 int s; 4059 struct psref psref; 4060 int bound; 4061 int ours = 1; 4062 4063 bound = curlwp_bind(); 4064 s = pserialize_read_enter(); 4065 IN6_ADDRLIST_READER_FOREACH(ia) { 4066 bool ingroup; 4067 4068 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4069 (const struct sockaddr *)&ia->ia_addr, 0)) { 4070 pserialize_read_exit(s); 4071 goto ours; 4072 } 4073 ia6_acquire(ia, &psref); 4074 pserialize_read_exit(s); 4075 4076 /* 4077 * XXX Multicast 4078 * XXX why do we care about multlicast here while we don't care 4079 * about IPv4 multicast?? 4080 * XXX scope 4081 */ 4082 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4083 if (ingroup) { 4084 ia6_release(ia, &psref); 4085 goto ours; 4086 } 4087 4088 s = pserialize_read_enter(); 4089 ia6_release(ia, &psref); 4090 } 4091 pserialize_read_exit(s); 4092 4093 /* loopback, just for safety */ 4094 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4095 goto ours; 4096 4097 ours = 0; 4098 ours: 4099 curlwp_bindx(bound); 4100 4101 return ours; 4102 } 4103 #endif /*INET6*/ 4104 4105 /* 4106 * compare two secasindex structure. 4107 * flag can specify to compare 2 saidxes. 4108 * compare two secasindex structure without both mode and reqid. 4109 * don't compare port. 4110 * IN: 4111 * saidx0: source, it can be in SAD. 4112 * saidx1: object. 4113 * OUT: 4114 * 1 : equal 4115 * 0 : not equal 4116 */ 4117 static int 4118 key_saidx_match( 4119 const struct secasindex *saidx0, 4120 const struct secasindex *saidx1, 4121 int flag) 4122 { 4123 int chkport; 4124 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4125 4126 KASSERT(saidx0 != NULL); 4127 KASSERT(saidx1 != NULL); 4128 4129 /* sanity */ 4130 if (saidx0->proto != saidx1->proto) 4131 return 0; 4132 4133 if (flag == CMP_EXACTLY) { 4134 if (saidx0->mode != saidx1->mode) 4135 return 0; 4136 if (saidx0->reqid != saidx1->reqid) 4137 return 0; 4138 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4139 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4140 return 0; 4141 } else { 4142 4143 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4144 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4145 /* 4146 * If reqid of SPD is non-zero, unique SA is required. 4147 * The result must be of same reqid in this case. 4148 */ 4149 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4150 return 0; 4151 } 4152 4153 if (flag == CMP_MODE_REQID) { 4154 if (saidx0->mode != IPSEC_MODE_ANY && 4155 saidx0->mode != saidx1->mode) 4156 return 0; 4157 } 4158 4159 4160 sa0src = &saidx0->src.sa; 4161 sa0dst = &saidx0->dst.sa; 4162 sa1src = &saidx1->src.sa; 4163 sa1dst = &saidx1->dst.sa; 4164 /* 4165 * If NAT-T is enabled, check ports for tunnel mode. 4166 * Don't do it for transport mode, as there is no 4167 * port information available in the SP. 4168 * Also don't check ports if they are set to zero 4169 * in the SPD: This means we have a non-generated 4170 * SPD which can't know UDP ports. 4171 */ 4172 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4173 chkport = PORT_LOOSE; 4174 else 4175 chkport = PORT_NONE; 4176 4177 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4178 return 0; 4179 } 4180 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4181 return 0; 4182 } 4183 } 4184 4185 return 1; 4186 } 4187 4188 /* 4189 * compare two secindex structure exactly. 4190 * IN: 4191 * spidx0: source, it is often in SPD. 4192 * spidx1: object, it is often from PFKEY message. 4193 * OUT: 4194 * 1 : equal 4195 * 0 : not equal 4196 */ 4197 static int 4198 key_spidx_match_exactly( 4199 const struct secpolicyindex *spidx0, 4200 const struct secpolicyindex *spidx1) 4201 { 4202 4203 KASSERT(spidx0 != NULL); 4204 KASSERT(spidx1 != NULL); 4205 4206 /* sanity */ 4207 if (spidx0->prefs != spidx1->prefs || 4208 spidx0->prefd != spidx1->prefd || 4209 spidx0->ul_proto != spidx1->ul_proto) 4210 return 0; 4211 4212 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4213 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4214 } 4215 4216 /* 4217 * compare two secindex structure with mask. 4218 * IN: 4219 * spidx0: source, it is often in SPD. 4220 * spidx1: object, it is often from IP header. 4221 * OUT: 4222 * 1 : equal 4223 * 0 : not equal 4224 */ 4225 static int 4226 key_spidx_match_withmask( 4227 const struct secpolicyindex *spidx0, 4228 const struct secpolicyindex *spidx1) 4229 { 4230 4231 KASSERT(spidx0 != NULL); 4232 KASSERT(spidx1 != NULL); 4233 4234 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4235 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4236 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4237 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4238 return 0; 4239 4240 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4241 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4242 spidx0->ul_proto != spidx1->ul_proto) 4243 return 0; 4244 4245 switch (spidx0->src.sa.sa_family) { 4246 case AF_INET: 4247 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4248 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4249 return 0; 4250 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4251 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4252 return 0; 4253 break; 4254 case AF_INET6: 4255 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4256 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4257 return 0; 4258 /* 4259 * scope_id check. if sin6_scope_id is 0, we regard it 4260 * as a wildcard scope, which matches any scope zone ID. 4261 */ 4262 if (spidx0->src.sin6.sin6_scope_id && 4263 spidx1->src.sin6.sin6_scope_id && 4264 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4265 return 0; 4266 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4267 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4268 return 0; 4269 break; 4270 default: 4271 /* XXX */ 4272 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4273 return 0; 4274 break; 4275 } 4276 4277 switch (spidx0->dst.sa.sa_family) { 4278 case AF_INET: 4279 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4280 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4281 return 0; 4282 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4283 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4284 return 0; 4285 break; 4286 case AF_INET6: 4287 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4288 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4289 return 0; 4290 /* 4291 * scope_id check. if sin6_scope_id is 0, we regard it 4292 * as a wildcard scope, which matches any scope zone ID. 4293 */ 4294 if (spidx0->src.sin6.sin6_scope_id && 4295 spidx1->src.sin6.sin6_scope_id && 4296 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4297 return 0; 4298 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4299 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4300 return 0; 4301 break; 4302 default: 4303 /* XXX */ 4304 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4305 return 0; 4306 break; 4307 } 4308 4309 /* XXX Do we check other field ? e.g. flowinfo */ 4310 4311 return 1; 4312 } 4313 4314 /* returns 0 on match */ 4315 static int 4316 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4317 { 4318 switch (howport) { 4319 case PORT_NONE: 4320 return 0; 4321 case PORT_LOOSE: 4322 if (port1 == 0 || port2 == 0) 4323 return 0; 4324 /*FALLTHROUGH*/ 4325 case PORT_STRICT: 4326 if (port1 != port2) { 4327 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4328 "port fail %d != %d\n", port1, port2); 4329 return 1; 4330 } 4331 return 0; 4332 default: 4333 KASSERT(0); 4334 return 1; 4335 } 4336 } 4337 4338 /* returns 1 on match */ 4339 static int 4340 key_sockaddr_match( 4341 const struct sockaddr *sa1, 4342 const struct sockaddr *sa2, 4343 int howport) 4344 { 4345 const struct sockaddr_in *sin1, *sin2; 4346 const struct sockaddr_in6 *sin61, *sin62; 4347 4348 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4349 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4350 "fam/len fail %d != %d || %d != %d\n", 4351 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4352 sa2->sa_len); 4353 return 0; 4354 } 4355 4356 switch (sa1->sa_family) { 4357 case AF_INET: 4358 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4359 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4360 "len fail %d != %zu\n", 4361 sa1->sa_len, sizeof(struct sockaddr_in)); 4362 return 0; 4363 } 4364 sin1 = (const struct sockaddr_in *)sa1; 4365 sin2 = (const struct sockaddr_in *)sa2; 4366 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4367 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4368 "addr fail %#x != %#x\n", 4369 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4370 return 0; 4371 } 4372 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4373 return 0; 4374 } 4375 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4376 "addr success %#x[%d] == %#x[%d]\n", 4377 sin1->sin_addr.s_addr, sin1->sin_port, 4378 sin2->sin_addr.s_addr, sin2->sin_port); 4379 break; 4380 case AF_INET6: 4381 sin61 = (const struct sockaddr_in6 *)sa1; 4382 sin62 = (const struct sockaddr_in6 *)sa2; 4383 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4384 return 0; /*EINVAL*/ 4385 4386 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4387 return 0; 4388 } 4389 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4390 return 0; 4391 } 4392 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4393 return 0; 4394 } 4395 break; 4396 default: 4397 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4398 return 0; 4399 break; 4400 } 4401 4402 return 1; 4403 } 4404 4405 /* 4406 * compare two buffers with mask. 4407 * IN: 4408 * addr1: source 4409 * addr2: object 4410 * bits: Number of bits to compare 4411 * OUT: 4412 * 1 : equal 4413 * 0 : not equal 4414 */ 4415 static int 4416 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4417 { 4418 const unsigned char *p1 = a1; 4419 const unsigned char *p2 = a2; 4420 4421 /* XXX: This could be considerably faster if we compare a word 4422 * at a time, but it is complicated on LSB Endian machines */ 4423 4424 /* Handle null pointers */ 4425 if (p1 == NULL || p2 == NULL) 4426 return (p1 == p2); 4427 4428 while (bits >= 8) { 4429 if (*p1++ != *p2++) 4430 return 0; 4431 bits -= 8; 4432 } 4433 4434 if (bits > 0) { 4435 u_int8_t mask = ~((1<<(8-bits))-1); 4436 if ((*p1 & mask) != (*p2 & mask)) 4437 return 0; 4438 } 4439 return 1; /* Match! */ 4440 } 4441 4442 static void 4443 key_timehandler_spd(time_t now) 4444 { 4445 u_int dir; 4446 struct secpolicy *sp, *nextsp; 4447 4448 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4449 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 4450 if (sp->state == IPSEC_SPSTATE_DEAD) { 4451 key_sp_unlink(sp); /*XXX*/ 4452 4453 /* 'sp' dead; continue transfers to 4454 * 'sp = nextsp' 4455 */ 4456 continue; 4457 } 4458 4459 if (sp->lifetime == 0 && sp->validtime == 0) 4460 continue; 4461 4462 /* the deletion will occur next time */ 4463 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4464 (sp->validtime && now - sp->lastused > sp->validtime)) { 4465 key_sp_dead(sp); 4466 key_spdexpire(sp); 4467 continue; 4468 } 4469 } 4470 } 4471 } 4472 4473 static void 4474 key_timehandler_sad(time_t now) 4475 { 4476 struct secashead *sah, *nextsah; 4477 struct secasvar *sav, *nextsav; 4478 4479 LIST_FOREACH_SAFE(sah, &sahtree, chain, nextsah) { 4480 /* if sah has been dead, then delete it and process next sah. */ 4481 if (sah->state == SADB_SASTATE_DEAD) { 4482 key_delsah(sah); 4483 continue; 4484 } 4485 4486 /* if LARVAL entry doesn't become MATURE, delete it. */ 4487 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], 4488 chain, nextsav) { 4489 if (now - sav->created > key_larval_lifetime) { 4490 KEY_FREESAV(&sav); 4491 } 4492 } 4493 4494 /* 4495 * check MATURE entry to start to send expire message 4496 * whether or not. 4497 */ 4498 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], 4499 chain, nextsav) { 4500 /* we don't need to check. */ 4501 if (sav->lft_s == NULL) 4502 continue; 4503 4504 /* sanity check */ 4505 if (sav->lft_c == NULL) { 4506 IPSECLOG(LOG_DEBUG, 4507 "There is no CURRENT time, why?\n"); 4508 continue; 4509 } 4510 4511 /* check SOFT lifetime */ 4512 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4513 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4514 /* 4515 * check SA to be used whether or not. 4516 * when SA hasn't been used, delete it. 4517 */ 4518 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4519 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4520 KEY_FREESAV(&sav); 4521 } else { 4522 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4523 /* 4524 * XXX If we keep to send expire 4525 * message in the status of 4526 * DYING. Do remove below code. 4527 */ 4528 key_expire(sav); 4529 } 4530 } 4531 /* check SOFT lifetime by bytes */ 4532 /* 4533 * XXX I don't know the way to delete this SA 4534 * when new SA is installed. Caution when it's 4535 * installed too big lifetime by time. 4536 */ 4537 else if (sav->lft_s->sadb_lifetime_bytes != 0 && 4538 sav->lft_s->sadb_lifetime_bytes < 4539 sav->lft_c->sadb_lifetime_bytes) { 4540 4541 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4542 /* 4543 * XXX If we keep to send expire 4544 * message in the status of 4545 * DYING. Do remove below code. 4546 */ 4547 key_expire(sav); 4548 } 4549 } 4550 4551 /* check DYING entry to change status to DEAD. */ 4552 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], 4553 chain, nextsav) { 4554 /* we don't need to check. */ 4555 if (sav->lft_h == NULL) 4556 continue; 4557 4558 /* sanity check */ 4559 if (sav->lft_c == NULL) { 4560 IPSECLOG(LOG_DEBUG, 4561 "There is no CURRENT time, why?\n"); 4562 continue; 4563 } 4564 4565 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4566 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4567 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4568 KEY_FREESAV(&sav); 4569 } 4570 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4571 else if (sav->lft_s != NULL 4572 && sav->lft_s->sadb_lifetime_addtime != 0 4573 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4574 /* 4575 * XXX: should be checked to be 4576 * installed the valid SA. 4577 */ 4578 4579 /* 4580 * If there is no SA then sending 4581 * expire message. 4582 */ 4583 key_expire(sav); 4584 } 4585 #endif 4586 /* check HARD lifetime by bytes */ 4587 else if (sav->lft_h->sadb_lifetime_bytes != 0 && 4588 sav->lft_h->sadb_lifetime_bytes < 4589 sav->lft_c->sadb_lifetime_bytes) { 4590 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4591 KEY_FREESAV(&sav); 4592 } 4593 } 4594 4595 /* delete entry in DEAD */ 4596 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], 4597 chain, nextsav) { 4598 /* sanity check */ 4599 if (sav->state != SADB_SASTATE_DEAD) { 4600 IPSECLOG(LOG_DEBUG, 4601 "invalid sav->state (queue: %d SA: %d): " 4602 "kill it anyway\n", 4603 SADB_SASTATE_DEAD, sav->state); 4604 } 4605 4606 /* 4607 * do not call key_freesav() here. 4608 * sav should already be freed, and sav->refcnt 4609 * shows other references to sav 4610 * (such as from SPD). 4611 */ 4612 } 4613 } 4614 } 4615 4616 static void 4617 key_timehandler_acq(time_t now) 4618 { 4619 #ifndef IPSEC_NONBLOCK_ACQUIRE 4620 struct secacq *acq, *nextacq; 4621 4622 restart: 4623 mutex_enter(&key_mtx); 4624 LIST_FOREACH_SAFE(acq, &acqtree, chain, nextacq) { 4625 if (now - acq->created > key_blockacq_lifetime) { 4626 LIST_REMOVE(acq, chain); 4627 mutex_exit(&key_mtx); 4628 kmem_free(acq, sizeof(*acq)); 4629 goto restart; 4630 } 4631 } 4632 mutex_exit(&key_mtx); 4633 #endif 4634 } 4635 4636 static void 4637 key_timehandler_spacq(time_t now) 4638 { 4639 #ifdef notyet 4640 struct secspacq *acq, *nextacq; 4641 4642 LIST_FOREACH_SAFE(acq, &spacqtree, chain, nextacq) { 4643 if (now - acq->created > key_blockacq_lifetime) { 4644 KASSERT(__LIST_CHAINED(acq)); 4645 LIST_REMOVE(acq, chain); 4646 kmem_free(acq, sizeof(*acq)); 4647 } 4648 } 4649 #endif 4650 } 4651 4652 /* 4653 * time handler. 4654 * scanning SPD and SAD to check status for each entries, 4655 * and do to remove or to expire. 4656 */ 4657 static void 4658 key_timehandler_work(struct work *wk, void *arg) 4659 { 4660 int s; 4661 time_t now = time_uptime; 4662 4663 s = splsoftnet(); 4664 mutex_enter(softnet_lock); 4665 4666 key_timehandler_spd(now); 4667 key_timehandler_sad(now); 4668 key_timehandler_acq(now); 4669 key_timehandler_spacq(now); 4670 4671 /* do exchange to tick time !! */ 4672 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4673 4674 mutex_exit(softnet_lock); 4675 splx(s); 4676 return; 4677 } 4678 4679 static void 4680 key_timehandler(void *arg) 4681 { 4682 4683 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 4684 } 4685 4686 u_long 4687 key_random(void) 4688 { 4689 u_long value; 4690 4691 key_randomfill(&value, sizeof(value)); 4692 return value; 4693 } 4694 4695 void 4696 key_randomfill(void *p, size_t l) 4697 { 4698 4699 cprng_fast(p, l); 4700 } 4701 4702 /* 4703 * map SADB_SATYPE_* to IPPROTO_*. 4704 * if satype == SADB_SATYPE then satype is mapped to ~0. 4705 * OUT: 4706 * 0: invalid satype. 4707 */ 4708 static u_int16_t 4709 key_satype2proto(u_int8_t satype) 4710 { 4711 switch (satype) { 4712 case SADB_SATYPE_UNSPEC: 4713 return IPSEC_PROTO_ANY; 4714 case SADB_SATYPE_AH: 4715 return IPPROTO_AH; 4716 case SADB_SATYPE_ESP: 4717 return IPPROTO_ESP; 4718 case SADB_X_SATYPE_IPCOMP: 4719 return IPPROTO_IPCOMP; 4720 case SADB_X_SATYPE_TCPSIGNATURE: 4721 return IPPROTO_TCP; 4722 default: 4723 return 0; 4724 } 4725 /* NOTREACHED */ 4726 } 4727 4728 /* 4729 * map IPPROTO_* to SADB_SATYPE_* 4730 * OUT: 4731 * 0: invalid protocol type. 4732 */ 4733 static u_int8_t 4734 key_proto2satype(u_int16_t proto) 4735 { 4736 switch (proto) { 4737 case IPPROTO_AH: 4738 return SADB_SATYPE_AH; 4739 case IPPROTO_ESP: 4740 return SADB_SATYPE_ESP; 4741 case IPPROTO_IPCOMP: 4742 return SADB_X_SATYPE_IPCOMP; 4743 case IPPROTO_TCP: 4744 return SADB_X_SATYPE_TCPSIGNATURE; 4745 default: 4746 return 0; 4747 } 4748 /* NOTREACHED */ 4749 } 4750 4751 static int 4752 key_setsecasidx(int proto, int mode, int reqid, 4753 const struct sockaddr *src, const struct sockaddr *dst, 4754 struct secasindex * saidx) 4755 { 4756 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 4757 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 4758 4759 /* sa len safety check */ 4760 if (key_checksalen(src_u) != 0) 4761 return -1; 4762 if (key_checksalen(dst_u) != 0) 4763 return -1; 4764 4765 memset(saidx, 0, sizeof(*saidx)); 4766 saidx->proto = proto; 4767 saidx->mode = mode; 4768 saidx->reqid = reqid; 4769 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4770 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4771 4772 key_porttosaddr(&((saidx)->src), 0); 4773 key_porttosaddr(&((saidx)->dst), 0); 4774 return 0; 4775 } 4776 4777 static void 4778 key_init_spidx_bymsghdr(struct secpolicyindex *spidx, 4779 const struct sadb_msghdr *mhp) 4780 { 4781 const struct sadb_address *src0, *dst0; 4782 const struct sockaddr *src, *dst; 4783 const struct sadb_x_policy *xpl0; 4784 4785 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4786 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4787 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4788 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4789 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 4790 4791 memset(spidx, 0, sizeof(*spidx)); 4792 spidx->dir = xpl0->sadb_x_policy_dir; 4793 spidx->prefs = src0->sadb_address_prefixlen; 4794 spidx->prefd = dst0->sadb_address_prefixlen; 4795 spidx->ul_proto = src0->sadb_address_proto; 4796 /* XXX boundary check against sa_len */ 4797 memcpy(&spidx->src, src, src->sa_len); 4798 memcpy(&spidx->dst, dst, dst->sa_len); 4799 } 4800 4801 /* %%% PF_KEY */ 4802 /* 4803 * SADB_GETSPI processing is to receive 4804 * <base, (SA2), src address, dst address, (SPI range)> 4805 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4806 * tree with the status of LARVAL, and send 4807 * <base, SA(*), address(SD)> 4808 * to the IKMPd. 4809 * 4810 * IN: mhp: pointer to the pointer to each header. 4811 * OUT: NULL if fail. 4812 * other if success, return pointer to the message to send. 4813 */ 4814 static int 4815 key_api_getspi(struct socket *so, struct mbuf *m, 4816 const struct sadb_msghdr *mhp) 4817 { 4818 const struct sockaddr *src, *dst; 4819 struct secasindex saidx; 4820 struct secashead *newsah; 4821 struct secasvar *newsav; 4822 u_int8_t proto; 4823 u_int32_t spi; 4824 u_int8_t mode; 4825 u_int16_t reqid; 4826 int error; 4827 4828 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4829 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4830 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4831 return key_senderror(so, m, EINVAL); 4832 } 4833 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4834 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4835 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4836 return key_senderror(so, m, EINVAL); 4837 } 4838 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4839 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4840 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4841 } else { 4842 mode = IPSEC_MODE_ANY; 4843 reqid = 0; 4844 } 4845 4846 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4847 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4848 4849 /* map satype to proto */ 4850 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 4851 if (proto == 0) { 4852 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 4853 return key_senderror(so, m, EINVAL); 4854 } 4855 4856 4857 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 4858 if (error != 0) 4859 return key_senderror(so, m, EINVAL); 4860 4861 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 4862 if (error != 0) 4863 return key_senderror(so, m, EINVAL); 4864 4865 /* SPI allocation */ 4866 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4867 &saidx); 4868 if (spi == 0) 4869 return key_senderror(so, m, EINVAL); 4870 4871 /* get a SA index */ 4872 newsah = key_getsah(&saidx, CMP_REQID); 4873 if (newsah == NULL) { 4874 /* create a new SA index */ 4875 newsah = key_newsah(&saidx); 4876 if (newsah == NULL) { 4877 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 4878 return key_senderror(so, m, ENOBUFS); 4879 } 4880 } 4881 4882 /* get a new SA */ 4883 /* XXX rewrite */ 4884 newsav = KEY_NEWSAV(m, mhp, &error); 4885 if (newsav == NULL) { 4886 /* XXX don't free new SA index allocated in above. */ 4887 return key_senderror(so, m, error); 4888 } 4889 4890 /* set spi */ 4891 newsav->spi = htonl(spi); 4892 4893 /* add to satree */ 4894 newsav->refcnt = 1; 4895 newsav->sah = newsah; 4896 newsav->state = SADB_SASTATE_LARVAL; 4897 LIST_INSERT_TAIL(&newsah->savtree[SADB_SASTATE_LARVAL], newsav, 4898 secasvar, chain); 4899 4900 #ifndef IPSEC_NONBLOCK_ACQUIRE 4901 /* delete the entry in acqtree */ 4902 if (mhp->msg->sadb_msg_seq != 0) { 4903 struct secacq *acq; 4904 mutex_enter(&key_mtx); 4905 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 4906 if (acq != NULL) { 4907 /* reset counter in order to deletion by timehandler. */ 4908 acq->created = time_uptime; 4909 acq->count = 0; 4910 } 4911 mutex_exit(&key_mtx); 4912 } 4913 #endif 4914 4915 { 4916 struct mbuf *n, *nn; 4917 struct sadb_sa *m_sa; 4918 int off, len; 4919 4920 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4921 PFKEY_ALIGN8(sizeof(struct sadb_sa)) <= MCLBYTES); 4922 4923 /* create new sadb_msg to reply. */ 4924 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4925 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4926 4927 MGETHDR(n, M_DONTWAIT, MT_DATA); 4928 if (len > MHLEN) { 4929 MCLGET(n, M_DONTWAIT); 4930 if ((n->m_flags & M_EXT) == 0) { 4931 m_freem(n); 4932 n = NULL; 4933 } 4934 } 4935 if (!n) 4936 return key_senderror(so, m, ENOBUFS); 4937 4938 n->m_len = len; 4939 n->m_next = NULL; 4940 off = 0; 4941 4942 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4943 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4944 4945 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4946 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4947 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4948 m_sa->sadb_sa_spi = htonl(spi); 4949 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4950 4951 KASSERTMSG(off == len, "length inconsistency"); 4952 4953 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4954 SADB_EXT_ADDRESS_DST); 4955 if (!n->m_next) { 4956 m_freem(n); 4957 return key_senderror(so, m, ENOBUFS); 4958 } 4959 4960 if (n->m_len < sizeof(struct sadb_msg)) { 4961 n = m_pullup(n, sizeof(struct sadb_msg)); 4962 if (n == NULL) 4963 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4964 } 4965 4966 n->m_pkthdr.len = 0; 4967 for (nn = n; nn; nn = nn->m_next) 4968 n->m_pkthdr.len += nn->m_len; 4969 4970 key_fill_replymsg(n, newsav->seq); 4971 4972 m_freem(m); 4973 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4974 } 4975 } 4976 4977 /* 4978 * allocating new SPI 4979 * called by key_api_getspi(). 4980 * OUT: 4981 * 0: failure. 4982 * others: success. 4983 */ 4984 static u_int32_t 4985 key_do_getnewspi(const struct sadb_spirange *spirange, 4986 const struct secasindex *saidx) 4987 { 4988 u_int32_t newspi; 4989 u_int32_t spmin, spmax; 4990 int count = key_spi_trycnt; 4991 4992 /* set spi range to allocate */ 4993 if (spirange != NULL) { 4994 spmin = spirange->sadb_spirange_min; 4995 spmax = spirange->sadb_spirange_max; 4996 } else { 4997 spmin = key_spi_minval; 4998 spmax = key_spi_maxval; 4999 } 5000 /* IPCOMP needs 2-byte SPI */ 5001 if (saidx->proto == IPPROTO_IPCOMP) { 5002 u_int32_t t; 5003 if (spmin >= 0x10000) 5004 spmin = 0xffff; 5005 if (spmax >= 0x10000) 5006 spmax = 0xffff; 5007 if (spmin > spmax) { 5008 t = spmin; spmin = spmax; spmax = t; 5009 } 5010 } 5011 5012 if (spmin == spmax) { 5013 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5014 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 5015 return 0; 5016 } 5017 5018 count--; /* taking one cost. */ 5019 newspi = spmin; 5020 5021 } else { 5022 5023 /* init SPI */ 5024 newspi = 0; 5025 5026 /* when requesting to allocate spi ranged */ 5027 while (count--) { 5028 /* generate pseudo-random SPI value ranged. */ 5029 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5030 5031 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5032 break; 5033 } 5034 5035 if (count == 0 || newspi == 0) { 5036 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5037 return 0; 5038 } 5039 } 5040 5041 /* statistics */ 5042 keystat.getspi_count = 5043 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5044 5045 return newspi; 5046 } 5047 5048 static int 5049 key_handle_natt_info(struct secasvar *sav, 5050 const struct sadb_msghdr *mhp) 5051 { 5052 const char *msg = "?" ; 5053 struct sadb_x_nat_t_type *type; 5054 struct sadb_x_nat_t_port *sport, *dport; 5055 struct sadb_address *iaddr, *raddr; 5056 struct sadb_x_nat_t_frag *frag; 5057 5058 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5059 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5060 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5061 return 0; 5062 5063 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5064 msg = "TYPE"; 5065 goto bad; 5066 } 5067 5068 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5069 msg = "SPORT"; 5070 goto bad; 5071 } 5072 5073 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5074 msg = "DPORT"; 5075 goto bad; 5076 } 5077 5078 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5079 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5080 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5081 msg = "OAI"; 5082 goto bad; 5083 } 5084 } 5085 5086 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5087 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5088 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5089 msg = "OAR"; 5090 goto bad; 5091 } 5092 } 5093 5094 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5095 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5096 msg = "FRAG"; 5097 goto bad; 5098 } 5099 } 5100 5101 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5102 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5103 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5104 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5105 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5106 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5107 5108 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5109 type->sadb_x_nat_t_type_type, 5110 ntohs(sport->sadb_x_nat_t_port_port), 5111 ntohs(dport->sadb_x_nat_t_port_port)); 5112 5113 sav->natt_type = type->sadb_x_nat_t_type_type; 5114 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5115 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5116 if (frag) 5117 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5118 else 5119 sav->esp_frag = IP_MAXPACKET; 5120 5121 return 0; 5122 bad: 5123 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5124 __USE(msg); 5125 return -1; 5126 } 5127 5128 /* Just update the IPSEC_NAT_T ports if present */ 5129 static int 5130 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5131 const struct sadb_msghdr *mhp) 5132 { 5133 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5134 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5135 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5136 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5137 5138 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5139 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5140 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5141 struct sadb_x_nat_t_type *type; 5142 struct sadb_x_nat_t_port *sport; 5143 struct sadb_x_nat_t_port *dport; 5144 5145 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5146 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5147 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5148 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5149 return -1; 5150 } 5151 5152 type = (struct sadb_x_nat_t_type *) 5153 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5154 sport = (struct sadb_x_nat_t_port *) 5155 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5156 dport = (struct sadb_x_nat_t_port *) 5157 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5158 5159 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5160 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5161 5162 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5163 type->sadb_x_nat_t_type_type, 5164 ntohs(sport->sadb_x_nat_t_port_port), 5165 ntohs(dport->sadb_x_nat_t_port_port)); 5166 } 5167 5168 return 0; 5169 } 5170 5171 5172 /* 5173 * SADB_UPDATE processing 5174 * receive 5175 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5176 * key(AE), (identity(SD),) (sensitivity)> 5177 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5178 * and send 5179 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5180 * (identity(SD),) (sensitivity)> 5181 * to the ikmpd. 5182 * 5183 * m will always be freed. 5184 */ 5185 static int 5186 key_api_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5187 { 5188 struct sadb_sa *sa0; 5189 const struct sockaddr *src, *dst; 5190 struct secasindex saidx; 5191 struct secashead *sah; 5192 struct secasvar *sav, *newsav; 5193 u_int16_t proto; 5194 u_int8_t mode; 5195 u_int16_t reqid; 5196 int error; 5197 5198 /* map satype to proto */ 5199 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5200 if (proto == 0) { 5201 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5202 return key_senderror(so, m, EINVAL); 5203 } 5204 5205 if (mhp->ext[SADB_EXT_SA] == NULL || 5206 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5207 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5208 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5209 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5210 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5211 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5212 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5213 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5214 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5215 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5216 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5217 return key_senderror(so, m, EINVAL); 5218 } 5219 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5220 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5221 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5222 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5223 return key_senderror(so, m, EINVAL); 5224 } 5225 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5226 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5227 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5228 } else { 5229 mode = IPSEC_MODE_ANY; 5230 reqid = 0; 5231 } 5232 /* XXX boundary checking for other extensions */ 5233 5234 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5235 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5236 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5237 5238 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5239 if (error != 0) 5240 return key_senderror(so, m, EINVAL); 5241 5242 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5243 if (error != 0) 5244 return key_senderror(so, m, EINVAL); 5245 5246 /* get a SA header */ 5247 sah = key_getsah(&saidx, CMP_REQID); 5248 if (sah == NULL) { 5249 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5250 return key_senderror(so, m, ENOENT); 5251 } 5252 5253 /* set spidx if there */ 5254 /* XXX rewrite */ 5255 error = key_setident(sah, m, mhp); 5256 if (error) 5257 return key_senderror(so, m, error); 5258 5259 /* find a SA with sequence number. */ 5260 #ifdef IPSEC_DOSEQCHECK 5261 if (mhp->msg->sadb_msg_seq != 0) { 5262 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5263 if (sav == NULL) { 5264 IPSECLOG(LOG_DEBUG, 5265 "no larval SA with sequence %u exists.\n", 5266 mhp->msg->sadb_msg_seq); 5267 return key_senderror(so, m, ENOENT); 5268 } 5269 } 5270 #else 5271 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5272 if (sav == NULL) { 5273 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5274 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5275 return key_senderror(so, m, EINVAL); 5276 } 5277 #endif 5278 5279 /* validity check */ 5280 if (sav->sah->saidx.proto != proto) { 5281 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5282 sav->sah->saidx.proto, proto); 5283 return key_senderror(so, m, EINVAL); 5284 } 5285 #ifdef IPSEC_DOSEQCHECK 5286 if (sav->spi != sa0->sadb_sa_spi) { 5287 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5288 (u_int32_t)ntohl(sav->spi), 5289 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5290 return key_senderror(so, m, EINVAL); 5291 } 5292 #endif 5293 if (sav->pid != mhp->msg->sadb_msg_pid) { 5294 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5295 sav->pid, mhp->msg->sadb_msg_pid); 5296 return key_senderror(so, m, EINVAL); 5297 } 5298 5299 /* 5300 * Allocate a new SA instead of modifying the existing SA directly 5301 * to avoid race conditions. 5302 */ 5303 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 5304 5305 /* copy sav values */ 5306 newsav->spi = sav->spi; 5307 newsav->seq = sav->seq; 5308 newsav->created = sav->created; 5309 newsav->pid = sav->pid; 5310 newsav->sah = sav->sah; 5311 5312 error = key_setsaval(newsav, m, mhp); 5313 if (error) { 5314 key_delsav(newsav); 5315 return key_senderror(so, m, error); 5316 } 5317 5318 error = key_handle_natt_info(newsav, mhp); 5319 if (error != 0) { 5320 key_delsav(newsav); 5321 return key_senderror(so, m, error); 5322 } 5323 5324 error = key_init_xform(newsav); 5325 if (error != 0) { 5326 key_delsav(newsav); 5327 return key_senderror(so, m, error); 5328 } 5329 5330 /* add to satree */ 5331 newsav->refcnt = 1; 5332 newsav->state = SADB_SASTATE_MATURE; 5333 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_MATURE], newsav, 5334 secasvar, chain); 5335 5336 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5337 KEY_FREESAV(&sav); 5338 5339 { 5340 struct mbuf *n; 5341 5342 /* set msg buf from mhp */ 5343 n = key_getmsgbuf_x1(m, mhp); 5344 if (n == NULL) { 5345 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5346 return key_senderror(so, m, ENOBUFS); 5347 } 5348 5349 m_freem(m); 5350 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5351 } 5352 } 5353 5354 /* 5355 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5356 * only called by key_api_update(). 5357 * OUT: 5358 * NULL : not found 5359 * others : found, pointer to a SA. 5360 */ 5361 #ifdef IPSEC_DOSEQCHECK 5362 static struct secasvar * 5363 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5364 { 5365 struct secasvar *sav; 5366 u_int state; 5367 5368 state = SADB_SASTATE_LARVAL; 5369 5370 /* search SAD with sequence number ? */ 5371 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5372 5373 KEY_CHKSASTATE(state, sav->state); 5374 5375 if (sav->seq == seq) { 5376 SA_ADDREF(sav); 5377 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5378 "DP cause refcnt++:%d SA:%p\n", 5379 sav->refcnt, sav); 5380 return sav; 5381 } 5382 } 5383 5384 return NULL; 5385 } 5386 #endif 5387 5388 /* 5389 * SADB_ADD processing 5390 * add an entry to SA database, when received 5391 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5392 * key(AE), (identity(SD),) (sensitivity)> 5393 * from the ikmpd, 5394 * and send 5395 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5396 * (identity(SD),) (sensitivity)> 5397 * to the ikmpd. 5398 * 5399 * IGNORE identity and sensitivity messages. 5400 * 5401 * m will always be freed. 5402 */ 5403 static int 5404 key_api_add(struct socket *so, struct mbuf *m, 5405 const struct sadb_msghdr *mhp) 5406 { 5407 struct sadb_sa *sa0; 5408 const struct sockaddr *src, *dst; 5409 struct secasindex saidx; 5410 struct secashead *newsah; 5411 struct secasvar *newsav; 5412 u_int16_t proto; 5413 u_int8_t mode; 5414 u_int16_t reqid; 5415 int error; 5416 5417 /* map satype to proto */ 5418 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5419 if (proto == 0) { 5420 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5421 return key_senderror(so, m, EINVAL); 5422 } 5423 5424 if (mhp->ext[SADB_EXT_SA] == NULL || 5425 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5426 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5427 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5428 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5429 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5430 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5431 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5432 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5433 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5434 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5435 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5436 return key_senderror(so, m, EINVAL); 5437 } 5438 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5439 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5440 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5441 /* XXX need more */ 5442 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5443 return key_senderror(so, m, EINVAL); 5444 } 5445 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5446 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5447 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5448 } else { 5449 mode = IPSEC_MODE_ANY; 5450 reqid = 0; 5451 } 5452 5453 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5454 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5455 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5456 5457 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5458 if (error != 0) 5459 return key_senderror(so, m, EINVAL); 5460 5461 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5462 if (error != 0) 5463 return key_senderror(so, m, EINVAL); 5464 5465 /* get a SA header */ 5466 newsah = key_getsah(&saidx, CMP_REQID); 5467 if (newsah == NULL) { 5468 /* create a new SA header */ 5469 newsah = key_newsah(&saidx); 5470 if (newsah == NULL) { 5471 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5472 return key_senderror(so, m, ENOBUFS); 5473 } 5474 } 5475 5476 /* set spidx if there */ 5477 /* XXX rewrite */ 5478 error = key_setident(newsah, m, mhp); 5479 if (error) { 5480 return key_senderror(so, m, error); 5481 } 5482 5483 /* create new SA entry. */ 5484 /* We can create new SA only if SPI is differenct. */ 5485 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5486 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5487 return key_senderror(so, m, EEXIST); 5488 } 5489 newsav = KEY_NEWSAV(m, mhp, &error); 5490 if (newsav == NULL) { 5491 return key_senderror(so, m, error); 5492 } 5493 newsav->sah = newsah; 5494 5495 error = key_handle_natt_info(newsav, mhp); 5496 if (error != 0) { 5497 key_delsav(newsav); 5498 return key_senderror(so, m, EINVAL); 5499 } 5500 5501 error = key_init_xform(newsav); 5502 if (error != 0) { 5503 key_delsav(newsav); 5504 return key_senderror(so, m, error); 5505 } 5506 5507 /* add to satree */ 5508 newsav->refcnt = 1; 5509 newsav->state = SADB_SASTATE_MATURE; 5510 LIST_INSERT_TAIL(&newsah->savtree[SADB_SASTATE_MATURE], newsav, 5511 secasvar, chain); 5512 5513 /* 5514 * don't call key_freesav() here, as we would like to keep the SA 5515 * in the database on success. 5516 */ 5517 5518 { 5519 struct mbuf *n; 5520 5521 /* set msg buf from mhp */ 5522 n = key_getmsgbuf_x1(m, mhp); 5523 if (n == NULL) { 5524 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5525 return key_senderror(so, m, ENOBUFS); 5526 } 5527 5528 m_freem(m); 5529 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5530 } 5531 } 5532 5533 /* m is retained */ 5534 static int 5535 key_setident(struct secashead *sah, struct mbuf *m, 5536 const struct sadb_msghdr *mhp) 5537 { 5538 const struct sadb_ident *idsrc, *iddst; 5539 int idsrclen, iddstlen; 5540 5541 KASSERT(!cpu_softintr_p()); 5542 KASSERT(sah != NULL); 5543 KASSERT(m != NULL); 5544 KASSERT(mhp != NULL); 5545 KASSERT(mhp->msg != NULL); 5546 5547 /* 5548 * Can be called with an existing sah from key_api_update(). 5549 */ 5550 if (sah->idents != NULL) { 5551 kmem_free(sah->idents, sah->idents_len); 5552 sah->idents = NULL; 5553 sah->idents_len = 0; 5554 } 5555 if (sah->identd != NULL) { 5556 kmem_free(sah->identd, sah->identd_len); 5557 sah->identd = NULL; 5558 sah->identd_len = 0; 5559 } 5560 5561 /* don't make buffer if not there */ 5562 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5563 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5564 sah->idents = NULL; 5565 sah->identd = NULL; 5566 return 0; 5567 } 5568 5569 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5570 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5571 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 5572 return EINVAL; 5573 } 5574 5575 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5576 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5577 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5578 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5579 5580 /* validity check */ 5581 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5582 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 5583 return EINVAL; 5584 } 5585 5586 switch (idsrc->sadb_ident_type) { 5587 case SADB_IDENTTYPE_PREFIX: 5588 case SADB_IDENTTYPE_FQDN: 5589 case SADB_IDENTTYPE_USERFQDN: 5590 default: 5591 /* XXX do nothing */ 5592 sah->idents = NULL; 5593 sah->identd = NULL; 5594 return 0; 5595 } 5596 5597 /* make structure */ 5598 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 5599 sah->idents_len = idsrclen; 5600 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 5601 sah->identd_len = iddstlen; 5602 memcpy(sah->idents, idsrc, idsrclen); 5603 memcpy(sah->identd, iddst, iddstlen); 5604 5605 return 0; 5606 } 5607 5608 /* 5609 * m will not be freed on return. 5610 * it is caller's responsibility to free the result. 5611 */ 5612 static struct mbuf * 5613 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5614 { 5615 struct mbuf *n; 5616 5617 KASSERT(m != NULL); 5618 KASSERT(mhp != NULL); 5619 KASSERT(mhp->msg != NULL); 5620 5621 /* create new sadb_msg to reply. */ 5622 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5623 SADB_EXT_SA, SADB_X_EXT_SA2, 5624 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5625 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5626 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5627 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5628 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5629 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5630 if (!n) 5631 return NULL; 5632 5633 if (n->m_len < sizeof(struct sadb_msg)) { 5634 n = m_pullup(n, sizeof(struct sadb_msg)); 5635 if (n == NULL) 5636 return NULL; 5637 } 5638 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5639 mtod(n, struct sadb_msg *)->sadb_msg_len = 5640 PFKEY_UNIT64(n->m_pkthdr.len); 5641 5642 return n; 5643 } 5644 5645 static int key_delete_all (struct socket *, struct mbuf *, 5646 const struct sadb_msghdr *, u_int16_t); 5647 5648 /* 5649 * SADB_DELETE processing 5650 * receive 5651 * <base, SA(*), address(SD)> 5652 * from the ikmpd, and set SADB_SASTATE_DEAD, 5653 * and send, 5654 * <base, SA(*), address(SD)> 5655 * to the ikmpd. 5656 * 5657 * m will always be freed. 5658 */ 5659 static int 5660 key_api_delete(struct socket *so, struct mbuf *m, 5661 const struct sadb_msghdr *mhp) 5662 { 5663 struct sadb_sa *sa0; 5664 const struct sockaddr *src, *dst; 5665 struct secasindex saidx; 5666 struct secashead *sah; 5667 struct secasvar *sav = NULL; 5668 u_int16_t proto; 5669 int error; 5670 5671 /* map satype to proto */ 5672 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5673 if (proto == 0) { 5674 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5675 return key_senderror(so, m, EINVAL); 5676 } 5677 5678 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5679 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5680 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5681 return key_senderror(so, m, EINVAL); 5682 } 5683 5684 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5685 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5686 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5687 return key_senderror(so, m, EINVAL); 5688 } 5689 5690 if (mhp->ext[SADB_EXT_SA] == NULL) { 5691 /* 5692 * Caller wants us to delete all non-LARVAL SAs 5693 * that match the src/dst. This is used during 5694 * IKE INITIAL-CONTACT. 5695 */ 5696 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 5697 return key_delete_all(so, m, mhp, proto); 5698 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5699 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5700 return key_senderror(so, m, EINVAL); 5701 } 5702 5703 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5704 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5705 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5706 5707 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5708 if (error != 0) 5709 return key_senderror(so, m, EINVAL); 5710 5711 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5712 if (error != 0) 5713 return key_senderror(so, m, EINVAL); 5714 5715 /* get a SA header */ 5716 sah = key_getsah(&saidx, CMP_HEAD); 5717 if (sah != NULL) { 5718 /* get a SA with SPI. */ 5719 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5720 } 5721 5722 if (sav == NULL) { 5723 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5724 return key_senderror(so, m, ENOENT); 5725 } 5726 5727 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5728 KEY_FREESAV(&sav); 5729 5730 { 5731 struct mbuf *n; 5732 5733 /* create new sadb_msg to reply. */ 5734 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5735 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5736 if (!n) 5737 return key_senderror(so, m, ENOBUFS); 5738 5739 n = key_fill_replymsg(n, 0); 5740 if (n == NULL) 5741 return key_senderror(so, m, ENOBUFS); 5742 5743 m_freem(m); 5744 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5745 } 5746 } 5747 5748 /* 5749 * delete all SAs for src/dst. Called from key_api_delete(). 5750 */ 5751 static int 5752 key_delete_all(struct socket *so, struct mbuf *m, 5753 const struct sadb_msghdr *mhp, u_int16_t proto) 5754 { 5755 const struct sockaddr *src, *dst; 5756 struct secasindex saidx; 5757 struct secashead *sah; 5758 struct secasvar *sav, *nextsav; 5759 u_int state; 5760 int error; 5761 5762 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5763 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5764 5765 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5766 if (error != 0) 5767 return key_senderror(so, m, EINVAL); 5768 5769 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5770 if (error != 0) 5771 return key_senderror(so, m, EINVAL); 5772 5773 sah = key_getsah(&saidx, CMP_HEAD); 5774 if (sah != NULL) { 5775 /* Delete all non-LARVAL SAs. */ 5776 SASTATE_ALIVE_FOREACH(state) { 5777 if (state == SADB_SASTATE_LARVAL) 5778 continue; 5779 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 5780 nextsav) { 5781 /* sanity check */ 5782 if (sav->state != state) { 5783 IPSECLOG(LOG_DEBUG, 5784 "invalid sav->state " 5785 "(queue: %d SA: %d)\n", 5786 state, sav->state); 5787 continue; 5788 } 5789 5790 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5791 KEY_FREESAV(&sav); 5792 } 5793 } 5794 } 5795 { 5796 struct mbuf *n; 5797 5798 /* create new sadb_msg to reply. */ 5799 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5800 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5801 if (!n) 5802 return key_senderror(so, m, ENOBUFS); 5803 5804 n = key_fill_replymsg(n, 0); 5805 if (n == NULL) 5806 return key_senderror(so, m, ENOBUFS); 5807 5808 m_freem(m); 5809 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5810 } 5811 } 5812 5813 /* 5814 * SADB_GET processing 5815 * receive 5816 * <base, SA(*), address(SD)> 5817 * from the ikmpd, and get a SP and a SA to respond, 5818 * and send, 5819 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5820 * (identity(SD),) (sensitivity)> 5821 * to the ikmpd. 5822 * 5823 * m will always be freed. 5824 */ 5825 static int 5826 key_api_get(struct socket *so, struct mbuf *m, 5827 const struct sadb_msghdr *mhp) 5828 { 5829 struct sadb_sa *sa0; 5830 const struct sockaddr *src, *dst; 5831 struct secasindex saidx; 5832 struct secashead *sah; 5833 struct secasvar *sav = NULL; 5834 u_int16_t proto; 5835 int error; 5836 5837 /* map satype to proto */ 5838 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5839 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5840 return key_senderror(so, m, EINVAL); 5841 } 5842 5843 if (mhp->ext[SADB_EXT_SA] == NULL || 5844 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5845 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5846 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5847 return key_senderror(so, m, EINVAL); 5848 } 5849 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5850 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5851 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5852 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5853 return key_senderror(so, m, EINVAL); 5854 } 5855 5856 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5857 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5858 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5859 5860 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5861 if (error != 0) 5862 return key_senderror(so, m, EINVAL); 5863 5864 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5865 if (error != 0) 5866 return key_senderror(so, m, EINVAL); 5867 5868 /* get a SA header */ 5869 sah = key_getsah(&saidx, CMP_HEAD); 5870 if (sah != NULL) { 5871 /* get a SA with SPI. */ 5872 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5873 } 5874 if (sav == NULL) { 5875 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5876 return key_senderror(so, m, ENOENT); 5877 } 5878 5879 { 5880 struct mbuf *n; 5881 u_int8_t satype; 5882 5883 /* map proto to satype */ 5884 satype = key_proto2satype(sah->saidx.proto); 5885 if (satype == 0) { 5886 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 5887 return key_senderror(so, m, EINVAL); 5888 } 5889 5890 /* create new sadb_msg to reply. */ 5891 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5892 mhp->msg->sadb_msg_pid); 5893 if (!n) 5894 return key_senderror(so, m, ENOBUFS); 5895 5896 m_freem(m); 5897 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5898 } 5899 } 5900 5901 /* XXX make it sysctl-configurable? */ 5902 static void 5903 key_getcomb_setlifetime(struct sadb_comb *comb) 5904 { 5905 5906 comb->sadb_comb_soft_allocations = 1; 5907 comb->sadb_comb_hard_allocations = 1; 5908 comb->sadb_comb_soft_bytes = 0; 5909 comb->sadb_comb_hard_bytes = 0; 5910 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5911 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5912 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5913 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5914 } 5915 5916 /* 5917 * XXX reorder combinations by preference 5918 * XXX no idea if the user wants ESP authentication or not 5919 */ 5920 static struct mbuf * 5921 key_getcomb_esp(void) 5922 { 5923 struct sadb_comb *comb; 5924 const struct enc_xform *algo; 5925 struct mbuf *result = NULL, *m, *n; 5926 int encmin; 5927 int i, off, o; 5928 int totlen; 5929 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5930 5931 m = NULL; 5932 for (i = 1; i <= SADB_EALG_MAX; i++) { 5933 algo = esp_algorithm_lookup(i); 5934 if (algo == NULL) 5935 continue; 5936 5937 /* discard algorithms with key size smaller than system min */ 5938 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5939 continue; 5940 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5941 encmin = ipsec_esp_keymin; 5942 else 5943 encmin = _BITS(algo->minkey); 5944 5945 if (ipsec_esp_auth) 5946 m = key_getcomb_ah(); 5947 else { 5948 KASSERTMSG(l <= MLEN, 5949 "l=%u > MLEN=%lu", l, (u_long) MLEN); 5950 MGET(m, M_DONTWAIT, MT_DATA); 5951 if (m) { 5952 M_ALIGN(m, l); 5953 m->m_len = l; 5954 m->m_next = NULL; 5955 memset(mtod(m, void *), 0, m->m_len); 5956 } 5957 } 5958 if (!m) 5959 goto fail; 5960 5961 totlen = 0; 5962 for (n = m; n; n = n->m_next) 5963 totlen += n->m_len; 5964 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 5965 5966 for (off = 0; off < totlen; off += l) { 5967 n = m_pulldown(m, off, l, &o); 5968 if (!n) { 5969 /* m is already freed */ 5970 goto fail; 5971 } 5972 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5973 memset(comb, 0, sizeof(*comb)); 5974 key_getcomb_setlifetime(comb); 5975 comb->sadb_comb_encrypt = i; 5976 comb->sadb_comb_encrypt_minbits = encmin; 5977 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5978 } 5979 5980 if (!result) 5981 result = m; 5982 else 5983 m_cat(result, m); 5984 } 5985 5986 return result; 5987 5988 fail: 5989 if (result) 5990 m_freem(result); 5991 return NULL; 5992 } 5993 5994 static void 5995 key_getsizes_ah(const struct auth_hash *ah, int alg, 5996 u_int16_t* ksmin, u_int16_t* ksmax) 5997 { 5998 *ksmin = *ksmax = ah->keysize; 5999 if (ah->keysize == 0) { 6000 /* 6001 * Transform takes arbitrary key size but algorithm 6002 * key size is restricted. Enforce this here. 6003 */ 6004 switch (alg) { 6005 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6006 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6007 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6008 default: 6009 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 6010 break; 6011 } 6012 } 6013 } 6014 6015 /* 6016 * XXX reorder combinations by preference 6017 */ 6018 static struct mbuf * 6019 key_getcomb_ah(void) 6020 { 6021 struct sadb_comb *comb; 6022 const struct auth_hash *algo; 6023 struct mbuf *m; 6024 u_int16_t minkeysize, maxkeysize; 6025 int i; 6026 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6027 6028 m = NULL; 6029 for (i = 1; i <= SADB_AALG_MAX; i++) { 6030 #if 1 6031 /* we prefer HMAC algorithms, not old algorithms */ 6032 if (i != SADB_AALG_SHA1HMAC && 6033 i != SADB_AALG_MD5HMAC && 6034 i != SADB_X_AALG_SHA2_256 && 6035 i != SADB_X_AALG_SHA2_384 && 6036 i != SADB_X_AALG_SHA2_512) 6037 continue; 6038 #endif 6039 algo = ah_algorithm_lookup(i); 6040 if (!algo) 6041 continue; 6042 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6043 /* discard algorithms with key size smaller than system min */ 6044 if (_BITS(minkeysize) < ipsec_ah_keymin) 6045 continue; 6046 6047 if (!m) { 6048 KASSERTMSG(l <= MLEN, 6049 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6050 MGET(m, M_DONTWAIT, MT_DATA); 6051 if (m) { 6052 M_ALIGN(m, l); 6053 m->m_len = l; 6054 m->m_next = NULL; 6055 } 6056 } else 6057 M_PREPEND(m, l, M_DONTWAIT); 6058 if (!m) 6059 return NULL; 6060 6061 if (m->m_len < sizeof(struct sadb_comb)) { 6062 m = m_pullup(m, sizeof(struct sadb_comb)); 6063 if (m == NULL) 6064 return NULL; 6065 } 6066 6067 comb = mtod(m, struct sadb_comb *); 6068 memset(comb, 0, sizeof(*comb)); 6069 key_getcomb_setlifetime(comb); 6070 comb->sadb_comb_auth = i; 6071 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6072 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6073 } 6074 6075 return m; 6076 } 6077 6078 /* 6079 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6080 * XXX reorder combinations by preference 6081 */ 6082 static struct mbuf * 6083 key_getcomb_ipcomp(void) 6084 { 6085 struct sadb_comb *comb; 6086 const struct comp_algo *algo; 6087 struct mbuf *m; 6088 int i; 6089 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6090 6091 m = NULL; 6092 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6093 algo = ipcomp_algorithm_lookup(i); 6094 if (!algo) 6095 continue; 6096 6097 if (!m) { 6098 KASSERTMSG(l <= MLEN, 6099 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6100 MGET(m, M_DONTWAIT, MT_DATA); 6101 if (m) { 6102 M_ALIGN(m, l); 6103 m->m_len = l; 6104 m->m_next = NULL; 6105 } 6106 } else 6107 M_PREPEND(m, l, M_DONTWAIT); 6108 if (!m) 6109 return NULL; 6110 6111 if (m->m_len < sizeof(struct sadb_comb)) { 6112 m = m_pullup(m, sizeof(struct sadb_comb)); 6113 if (m == NULL) 6114 return NULL; 6115 } 6116 6117 comb = mtod(m, struct sadb_comb *); 6118 memset(comb, 0, sizeof(*comb)); 6119 key_getcomb_setlifetime(comb); 6120 comb->sadb_comb_encrypt = i; 6121 /* what should we set into sadb_comb_*_{min,max}bits? */ 6122 } 6123 6124 return m; 6125 } 6126 6127 /* 6128 * XXX no way to pass mode (transport/tunnel) to userland 6129 * XXX replay checking? 6130 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6131 */ 6132 static struct mbuf * 6133 key_getprop(const struct secasindex *saidx) 6134 { 6135 struct sadb_prop *prop; 6136 struct mbuf *m, *n; 6137 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6138 int totlen; 6139 6140 switch (saidx->proto) { 6141 case IPPROTO_ESP: 6142 m = key_getcomb_esp(); 6143 break; 6144 case IPPROTO_AH: 6145 m = key_getcomb_ah(); 6146 break; 6147 case IPPROTO_IPCOMP: 6148 m = key_getcomb_ipcomp(); 6149 break; 6150 default: 6151 return NULL; 6152 } 6153 6154 if (!m) 6155 return NULL; 6156 M_PREPEND(m, l, M_DONTWAIT); 6157 if (!m) 6158 return NULL; 6159 6160 totlen = 0; 6161 for (n = m; n; n = n->m_next) 6162 totlen += n->m_len; 6163 6164 prop = mtod(m, struct sadb_prop *); 6165 memset(prop, 0, sizeof(*prop)); 6166 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6167 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6168 prop->sadb_prop_replay = 32; /* XXX */ 6169 6170 return m; 6171 } 6172 6173 /* 6174 * SADB_ACQUIRE processing called by key_checkrequest() and key_api_acquire(). 6175 * send 6176 * <base, SA, address(SD), (address(P)), x_policy, 6177 * (identity(SD),) (sensitivity,) proposal> 6178 * to KMD, and expect to receive 6179 * <base> with SADB_ACQUIRE if error occurred, 6180 * or 6181 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6182 * from KMD by PF_KEY. 6183 * 6184 * XXX x_policy is outside of RFC2367 (KAME extension). 6185 * XXX sensitivity is not supported. 6186 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6187 * see comment for key_getcomb_ipcomp(). 6188 * 6189 * OUT: 6190 * 0 : succeed 6191 * others: error number 6192 */ 6193 static int 6194 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6195 { 6196 struct mbuf *result = NULL, *m; 6197 #ifndef IPSEC_NONBLOCK_ACQUIRE 6198 struct secacq *newacq; 6199 #endif 6200 u_int8_t satype; 6201 int error = -1; 6202 u_int32_t seq; 6203 6204 /* sanity check */ 6205 KASSERT(saidx != NULL); 6206 satype = key_proto2satype(saidx->proto); 6207 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6208 6209 #ifndef IPSEC_NONBLOCK_ACQUIRE 6210 /* 6211 * We never do anything about acquirng SA. There is anather 6212 * solution that kernel blocks to send SADB_ACQUIRE message until 6213 * getting something message from IKEd. In later case, to be 6214 * managed with ACQUIRING list. 6215 */ 6216 /* Get an entry to check whether sending message or not. */ 6217 mutex_enter(&key_mtx); 6218 newacq = key_getacq(saidx); 6219 if (newacq != NULL) { 6220 if (key_blockacq_count < newacq->count) { 6221 /* reset counter and do send message. */ 6222 newacq->count = 0; 6223 } else { 6224 /* increment counter and do nothing. */ 6225 newacq->count++; 6226 mutex_exit(&key_mtx); 6227 return 0; 6228 } 6229 } else { 6230 /* make new entry for blocking to send SADB_ACQUIRE. */ 6231 newacq = key_newacq(saidx); 6232 if (newacq == NULL) 6233 return ENOBUFS; 6234 6235 /* add to acqtree */ 6236 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6237 } 6238 6239 seq = newacq->seq; 6240 mutex_exit(&key_mtx); 6241 #else 6242 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6243 #endif 6244 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6245 if (!m) { 6246 error = ENOBUFS; 6247 goto fail; 6248 } 6249 result = m; 6250 6251 /* set sadb_address for saidx's. */ 6252 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6253 IPSEC_ULPROTO_ANY); 6254 if (!m) { 6255 error = ENOBUFS; 6256 goto fail; 6257 } 6258 m_cat(result, m); 6259 6260 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6261 IPSEC_ULPROTO_ANY); 6262 if (!m) { 6263 error = ENOBUFS; 6264 goto fail; 6265 } 6266 m_cat(result, m); 6267 6268 /* XXX proxy address (optional) */ 6269 6270 /* set sadb_x_policy */ 6271 if (sp) { 6272 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6273 if (!m) { 6274 error = ENOBUFS; 6275 goto fail; 6276 } 6277 m_cat(result, m); 6278 } 6279 6280 /* XXX identity (optional) */ 6281 #if 0 6282 if (idexttype && fqdn) { 6283 /* create identity extension (FQDN) */ 6284 struct sadb_ident *id; 6285 int fqdnlen; 6286 6287 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6288 id = (struct sadb_ident *)p; 6289 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6290 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6291 id->sadb_ident_exttype = idexttype; 6292 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6293 memcpy(id + 1, fqdn, fqdnlen); 6294 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6295 } 6296 6297 if (idexttype) { 6298 /* create identity extension (USERFQDN) */ 6299 struct sadb_ident *id; 6300 int userfqdnlen; 6301 6302 if (userfqdn) { 6303 /* +1 for terminating-NUL */ 6304 userfqdnlen = strlen(userfqdn) + 1; 6305 } else 6306 userfqdnlen = 0; 6307 id = (struct sadb_ident *)p; 6308 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6309 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6310 id->sadb_ident_exttype = idexttype; 6311 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6312 /* XXX is it correct? */ 6313 if (curlwp) 6314 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6315 if (userfqdn && userfqdnlen) 6316 memcpy(id + 1, userfqdn, userfqdnlen); 6317 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6318 } 6319 #endif 6320 6321 /* XXX sensitivity (optional) */ 6322 6323 /* create proposal/combination extension */ 6324 m = key_getprop(saidx); 6325 #if 0 6326 /* 6327 * spec conformant: always attach proposal/combination extension, 6328 * the problem is that we have no way to attach it for ipcomp, 6329 * due to the way sadb_comb is declared in RFC2367. 6330 */ 6331 if (!m) { 6332 error = ENOBUFS; 6333 goto fail; 6334 } 6335 m_cat(result, m); 6336 #else 6337 /* 6338 * outside of spec; make proposal/combination extension optional. 6339 */ 6340 if (m) 6341 m_cat(result, m); 6342 #endif 6343 6344 if ((result->m_flags & M_PKTHDR) == 0) { 6345 error = EINVAL; 6346 goto fail; 6347 } 6348 6349 if (result->m_len < sizeof(struct sadb_msg)) { 6350 result = m_pullup(result, sizeof(struct sadb_msg)); 6351 if (result == NULL) { 6352 error = ENOBUFS; 6353 goto fail; 6354 } 6355 } 6356 6357 result->m_pkthdr.len = 0; 6358 for (m = result; m; m = m->m_next) 6359 result->m_pkthdr.len += m->m_len; 6360 6361 mtod(result, struct sadb_msg *)->sadb_msg_len = 6362 PFKEY_UNIT64(result->m_pkthdr.len); 6363 6364 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6365 6366 fail: 6367 if (result) 6368 m_freem(result); 6369 return error; 6370 } 6371 6372 #ifndef IPSEC_NONBLOCK_ACQUIRE 6373 static struct secacq * 6374 key_newacq(const struct secasindex *saidx) 6375 { 6376 struct secacq *newacq; 6377 6378 /* get new entry */ 6379 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6380 if (newacq == NULL) { 6381 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6382 return NULL; 6383 } 6384 6385 /* copy secindex */ 6386 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6387 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6388 newacq->created = time_uptime; 6389 newacq->count = 0; 6390 6391 return newacq; 6392 } 6393 6394 static struct secacq * 6395 key_getacq(const struct secasindex *saidx) 6396 { 6397 struct secacq *acq; 6398 6399 KASSERT(mutex_owned(&key_mtx)); 6400 6401 LIST_FOREACH(acq, &acqtree, chain) { 6402 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6403 return acq; 6404 } 6405 6406 return NULL; 6407 } 6408 6409 static struct secacq * 6410 key_getacqbyseq(u_int32_t seq) 6411 { 6412 struct secacq *acq; 6413 6414 KASSERT(mutex_owned(&key_mtx)); 6415 6416 LIST_FOREACH(acq, &acqtree, chain) { 6417 if (acq->seq == seq) 6418 return acq; 6419 } 6420 6421 return NULL; 6422 } 6423 #endif 6424 6425 #ifdef notyet 6426 static struct secspacq * 6427 key_newspacq(const struct secpolicyindex *spidx) 6428 { 6429 struct secspacq *acq; 6430 6431 /* get new entry */ 6432 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6433 if (acq == NULL) { 6434 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6435 return NULL; 6436 } 6437 6438 /* copy secindex */ 6439 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6440 acq->created = time_uptime; 6441 acq->count = 0; 6442 6443 return acq; 6444 } 6445 6446 static struct secspacq * 6447 key_getspacq(const struct secpolicyindex *spidx) 6448 { 6449 struct secspacq *acq; 6450 6451 LIST_FOREACH(acq, &spacqtree, chain) { 6452 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6453 return acq; 6454 } 6455 6456 return NULL; 6457 } 6458 #endif /* notyet */ 6459 6460 /* 6461 * SADB_ACQUIRE processing, 6462 * in first situation, is receiving 6463 * <base> 6464 * from the ikmpd, and clear sequence of its secasvar entry. 6465 * 6466 * In second situation, is receiving 6467 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6468 * from a user land process, and return 6469 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6470 * to the socket. 6471 * 6472 * m will always be freed. 6473 */ 6474 static int 6475 key_api_acquire(struct socket *so, struct mbuf *m, 6476 const struct sadb_msghdr *mhp) 6477 { 6478 const struct sockaddr *src, *dst; 6479 struct secasindex saidx; 6480 struct secashead *sah; 6481 u_int16_t proto; 6482 int error; 6483 6484 /* 6485 * Error message from KMd. 6486 * We assume that if error was occurred in IKEd, the length of PFKEY 6487 * message is equal to the size of sadb_msg structure. 6488 * We do not raise error even if error occurred in this function. 6489 */ 6490 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6491 #ifndef IPSEC_NONBLOCK_ACQUIRE 6492 struct secacq *acq; 6493 6494 /* check sequence number */ 6495 if (mhp->msg->sadb_msg_seq == 0) { 6496 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 6497 m_freem(m); 6498 return 0; 6499 } 6500 6501 mutex_enter(&key_mtx); 6502 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 6503 if (acq == NULL) { 6504 mutex_exit(&key_mtx); 6505 /* 6506 * the specified larval SA is already gone, or we got 6507 * a bogus sequence number. we can silently ignore it. 6508 */ 6509 m_freem(m); 6510 return 0; 6511 } 6512 6513 /* reset acq counter in order to deletion by timehander. */ 6514 acq->created = time_uptime; 6515 acq->count = 0; 6516 mutex_exit(&key_mtx); 6517 #endif 6518 m_freem(m); 6519 return 0; 6520 } 6521 6522 /* 6523 * This message is from user land. 6524 */ 6525 6526 /* map satype to proto */ 6527 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6528 if (proto == 0) { 6529 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6530 return key_senderror(so, m, EINVAL); 6531 } 6532 6533 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6534 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6535 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6536 /* error */ 6537 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6538 return key_senderror(so, m, EINVAL); 6539 } 6540 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6541 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6542 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6543 /* error */ 6544 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6545 return key_senderror(so, m, EINVAL); 6546 } 6547 6548 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6549 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6550 6551 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6552 if (error != 0) 6553 return key_senderror(so, m, EINVAL); 6554 6555 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6556 if (error != 0) 6557 return key_senderror(so, m, EINVAL); 6558 6559 /* get a SA index */ 6560 sah = key_getsah(&saidx, CMP_MODE_REQID); 6561 if (sah != NULL) { 6562 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 6563 return key_senderror(so, m, EEXIST); 6564 } 6565 6566 error = key_acquire(&saidx, NULL); 6567 if (error != 0) { 6568 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 6569 error); 6570 return key_senderror(so, m, error); 6571 } 6572 6573 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6574 } 6575 6576 /* 6577 * SADB_REGISTER processing. 6578 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6579 * receive 6580 * <base> 6581 * from the ikmpd, and register a socket to send PF_KEY messages, 6582 * and send 6583 * <base, supported> 6584 * to KMD by PF_KEY. 6585 * If socket is detached, must free from regnode. 6586 * 6587 * m will always be freed. 6588 */ 6589 static int 6590 key_api_register(struct socket *so, struct mbuf *m, 6591 const struct sadb_msghdr *mhp) 6592 { 6593 struct secreg *reg, *newreg = 0; 6594 6595 /* check for invalid register message */ 6596 if (mhp->msg->sadb_msg_satype >= __arraycount(regtree)) 6597 return key_senderror(so, m, EINVAL); 6598 6599 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6600 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6601 goto setmsg; 6602 6603 /* Allocate regnode in advance, out of mutex */ 6604 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 6605 6606 /* check whether existing or not */ 6607 mutex_enter(&key_mtx); 6608 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6609 if (reg->so == so) { 6610 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 6611 mutex_exit(&key_mtx); 6612 kmem_free(newreg, sizeof(*newreg)); 6613 return key_senderror(so, m, EEXIST); 6614 } 6615 } 6616 6617 newreg->so = so; 6618 ((struct keycb *)sotorawcb(so))->kp_registered++; 6619 6620 /* add regnode to regtree. */ 6621 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6622 mutex_exit(&key_mtx); 6623 6624 setmsg: 6625 { 6626 struct mbuf *n; 6627 struct sadb_supported *sup; 6628 u_int len, alen, elen; 6629 int off; 6630 int i; 6631 struct sadb_alg *alg; 6632 6633 /* create new sadb_msg to reply. */ 6634 alen = 0; 6635 for (i = 1; i <= SADB_AALG_MAX; i++) { 6636 if (ah_algorithm_lookup(i)) 6637 alen += sizeof(struct sadb_alg); 6638 } 6639 if (alen) 6640 alen += sizeof(struct sadb_supported); 6641 elen = 0; 6642 for (i = 1; i <= SADB_EALG_MAX; i++) { 6643 if (esp_algorithm_lookup(i)) 6644 elen += sizeof(struct sadb_alg); 6645 } 6646 if (elen) 6647 elen += sizeof(struct sadb_supported); 6648 6649 len = sizeof(struct sadb_msg) + alen + elen; 6650 6651 if (len > MCLBYTES) 6652 return key_senderror(so, m, ENOBUFS); 6653 6654 MGETHDR(n, M_DONTWAIT, MT_DATA); 6655 if (len > MHLEN) { 6656 MCLGET(n, M_DONTWAIT); 6657 if ((n->m_flags & M_EXT) == 0) { 6658 m_freem(n); 6659 n = NULL; 6660 } 6661 } 6662 if (!n) 6663 return key_senderror(so, m, ENOBUFS); 6664 6665 n->m_pkthdr.len = n->m_len = len; 6666 n->m_next = NULL; 6667 off = 0; 6668 6669 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6670 n = key_fill_replymsg(n, 0); 6671 if (n == NULL) 6672 return key_senderror(so, m, ENOBUFS); 6673 6674 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6675 6676 /* for authentication algorithm */ 6677 if (alen) { 6678 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6679 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6680 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6681 off += PFKEY_ALIGN8(sizeof(*sup)); 6682 6683 for (i = 1; i <= SADB_AALG_MAX; i++) { 6684 const struct auth_hash *aalgo; 6685 u_int16_t minkeysize, maxkeysize; 6686 6687 aalgo = ah_algorithm_lookup(i); 6688 if (!aalgo) 6689 continue; 6690 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6691 alg->sadb_alg_id = i; 6692 alg->sadb_alg_ivlen = 0; 6693 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6694 alg->sadb_alg_minbits = _BITS(minkeysize); 6695 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6696 off += PFKEY_ALIGN8(sizeof(*alg)); 6697 } 6698 } 6699 6700 /* for encryption algorithm */ 6701 if (elen) { 6702 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6703 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6704 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6705 off += PFKEY_ALIGN8(sizeof(*sup)); 6706 6707 for (i = 1; i <= SADB_EALG_MAX; i++) { 6708 const struct enc_xform *ealgo; 6709 6710 ealgo = esp_algorithm_lookup(i); 6711 if (!ealgo) 6712 continue; 6713 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6714 alg->sadb_alg_id = i; 6715 alg->sadb_alg_ivlen = ealgo->blocksize; 6716 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6717 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6718 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6719 } 6720 } 6721 6722 KASSERTMSG(off == len, "length inconsistency"); 6723 6724 m_freem(m); 6725 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6726 } 6727 } 6728 6729 /* 6730 * free secreg entry registered. 6731 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6732 */ 6733 void 6734 key_freereg(struct socket *so) 6735 { 6736 struct secreg *reg; 6737 int i; 6738 6739 KASSERT(!cpu_softintr_p()); 6740 KASSERT(so != NULL); 6741 6742 /* 6743 * check whether existing or not. 6744 * check all type of SA, because there is a potential that 6745 * one socket is registered to multiple type of SA. 6746 */ 6747 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6748 mutex_enter(&key_mtx); 6749 LIST_FOREACH(reg, ®tree[i], chain) { 6750 if (reg->so == so) { 6751 LIST_REMOVE(reg, chain); 6752 break; 6753 } 6754 } 6755 mutex_exit(&key_mtx); 6756 if (reg != NULL) 6757 kmem_free(reg, sizeof(*reg)); 6758 } 6759 6760 return; 6761 } 6762 6763 /* 6764 * SADB_EXPIRE processing 6765 * send 6766 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6767 * to KMD by PF_KEY. 6768 * NOTE: We send only soft lifetime extension. 6769 * 6770 * OUT: 0 : succeed 6771 * others : error number 6772 */ 6773 static int 6774 key_expire(struct secasvar *sav) 6775 { 6776 int s; 6777 int satype; 6778 struct mbuf *result = NULL, *m; 6779 int len; 6780 int error = -1; 6781 struct sadb_lifetime *lt; 6782 6783 /* XXX: Why do we lock ? */ 6784 s = splsoftnet(); /*called from softclock()*/ 6785 6786 KASSERT(sav != NULL); 6787 KASSERT(sav->sah != NULL); 6788 6789 satype = key_proto2satype(sav->sah->saidx.proto); 6790 KASSERTMSG(satype != 0, "invalid proto is passed"); 6791 6792 /* set msg header */ 6793 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6794 if (!m) { 6795 error = ENOBUFS; 6796 goto fail; 6797 } 6798 result = m; 6799 6800 /* create SA extension */ 6801 m = key_setsadbsa(sav); 6802 if (!m) { 6803 error = ENOBUFS; 6804 goto fail; 6805 } 6806 m_cat(result, m); 6807 6808 /* create SA extension */ 6809 m = key_setsadbxsa2(sav->sah->saidx.mode, 6810 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 6811 if (!m) { 6812 error = ENOBUFS; 6813 goto fail; 6814 } 6815 m_cat(result, m); 6816 6817 /* create lifetime extension (current and soft) */ 6818 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6819 m = key_alloc_mbuf(len); 6820 if (!m || m->m_next) { /*XXX*/ 6821 if (m) 6822 m_freem(m); 6823 error = ENOBUFS; 6824 goto fail; 6825 } 6826 memset(mtod(m, void *), 0, len); 6827 lt = mtod(m, struct sadb_lifetime *); 6828 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6829 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6830 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6831 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6832 lt->sadb_lifetime_addtime = 6833 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 6834 lt->sadb_lifetime_usetime = 6835 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 6836 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6837 memcpy(lt, sav->lft_s, sizeof(*lt)); 6838 m_cat(result, m); 6839 6840 /* set sadb_address for source */ 6841 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 6842 FULLMASK, IPSEC_ULPROTO_ANY); 6843 if (!m) { 6844 error = ENOBUFS; 6845 goto fail; 6846 } 6847 m_cat(result, m); 6848 6849 /* set sadb_address for destination */ 6850 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 6851 FULLMASK, IPSEC_ULPROTO_ANY); 6852 if (!m) { 6853 error = ENOBUFS; 6854 goto fail; 6855 } 6856 m_cat(result, m); 6857 6858 if ((result->m_flags & M_PKTHDR) == 0) { 6859 error = EINVAL; 6860 goto fail; 6861 } 6862 6863 if (result->m_len < sizeof(struct sadb_msg)) { 6864 result = m_pullup(result, sizeof(struct sadb_msg)); 6865 if (result == NULL) { 6866 error = ENOBUFS; 6867 goto fail; 6868 } 6869 } 6870 6871 result->m_pkthdr.len = 0; 6872 for (m = result; m; m = m->m_next) 6873 result->m_pkthdr.len += m->m_len; 6874 6875 mtod(result, struct sadb_msg *)->sadb_msg_len = 6876 PFKEY_UNIT64(result->m_pkthdr.len); 6877 6878 splx(s); 6879 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6880 6881 fail: 6882 if (result) 6883 m_freem(result); 6884 splx(s); 6885 return error; 6886 } 6887 6888 /* 6889 * SADB_FLUSH processing 6890 * receive 6891 * <base> 6892 * from the ikmpd, and free all entries in secastree. 6893 * and send, 6894 * <base> 6895 * to the ikmpd. 6896 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6897 * 6898 * m will always be freed. 6899 */ 6900 static int 6901 key_api_flush(struct socket *so, struct mbuf *m, 6902 const struct sadb_msghdr *mhp) 6903 { 6904 struct sadb_msg *newmsg; 6905 struct secashead *sah; 6906 struct secasvar *sav, *nextsav; 6907 u_int16_t proto; 6908 u_int8_t state; 6909 6910 /* map satype to proto */ 6911 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6912 if (proto == 0) { 6913 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6914 return key_senderror(so, m, EINVAL); 6915 } 6916 6917 /* no SATYPE specified, i.e. flushing all SA. */ 6918 LIST_FOREACH(sah, &sahtree, chain) { 6919 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 6920 proto != sah->saidx.proto) 6921 continue; 6922 6923 SASTATE_ALIVE_FOREACH(state) { 6924 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 6925 nextsav) { 6926 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6927 KEY_FREESAV(&sav); 6928 } 6929 } 6930 6931 sah->state = SADB_SASTATE_DEAD; 6932 } 6933 6934 if (m->m_len < sizeof(struct sadb_msg) || 6935 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6936 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6937 return key_senderror(so, m, ENOBUFS); 6938 } 6939 6940 if (m->m_next) 6941 m_freem(m->m_next); 6942 m->m_next = NULL; 6943 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6944 newmsg = mtod(m, struct sadb_msg *); 6945 newmsg->sadb_msg_errno = 0; 6946 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6947 6948 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6949 } 6950 6951 6952 static struct mbuf * 6953 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6954 { 6955 struct secashead *sah; 6956 struct secasvar *sav; 6957 u_int16_t proto; 6958 u_int8_t satype; 6959 u_int8_t state; 6960 int cnt; 6961 struct mbuf *m, *n, *prev; 6962 6963 *lenp = 0; 6964 6965 /* map satype to proto */ 6966 proto = key_satype2proto(req_satype); 6967 if (proto == 0) { 6968 *errorp = EINVAL; 6969 return (NULL); 6970 } 6971 6972 /* count sav entries to be sent to userland. */ 6973 cnt = 0; 6974 LIST_FOREACH(sah, &sahtree, chain) { 6975 if (req_satype != SADB_SATYPE_UNSPEC && 6976 proto != sah->saidx.proto) 6977 continue; 6978 6979 SASTATE_ANY_FOREACH(state) { 6980 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6981 cnt++; 6982 } 6983 } 6984 } 6985 6986 if (cnt == 0) { 6987 *errorp = ENOENT; 6988 return (NULL); 6989 } 6990 6991 /* send this to the userland, one at a time. */ 6992 m = NULL; 6993 prev = m; 6994 LIST_FOREACH(sah, &sahtree, chain) { 6995 if (req_satype != SADB_SATYPE_UNSPEC && 6996 proto != sah->saidx.proto) 6997 continue; 6998 6999 /* map proto to satype */ 7000 satype = key_proto2satype(sah->saidx.proto); 7001 if (satype == 0) { 7002 m_freem(m); 7003 *errorp = EINVAL; 7004 return (NULL); 7005 } 7006 7007 SASTATE_ANY_FOREACH(state) { 7008 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7009 n = key_setdumpsa(sav, SADB_DUMP, satype, 7010 --cnt, pid); 7011 if (!n) { 7012 m_freem(m); 7013 *errorp = ENOBUFS; 7014 return (NULL); 7015 } 7016 7017 if (!m) 7018 m = n; 7019 else 7020 prev->m_nextpkt = n; 7021 prev = n; 7022 } 7023 } 7024 } 7025 7026 if (!m) { 7027 *errorp = EINVAL; 7028 return (NULL); 7029 } 7030 7031 if ((m->m_flags & M_PKTHDR) != 0) { 7032 m->m_pkthdr.len = 0; 7033 for (n = m; n; n = n->m_next) 7034 m->m_pkthdr.len += n->m_len; 7035 } 7036 7037 *errorp = 0; 7038 return (m); 7039 } 7040 7041 /* 7042 * SADB_DUMP processing 7043 * dump all entries including status of DEAD in SAD. 7044 * receive 7045 * <base> 7046 * from the ikmpd, and dump all secasvar leaves 7047 * and send, 7048 * <base> ..... 7049 * to the ikmpd. 7050 * 7051 * m will always be freed. 7052 */ 7053 static int 7054 key_api_dump(struct socket *so, struct mbuf *m0, 7055 const struct sadb_msghdr *mhp) 7056 { 7057 u_int16_t proto; 7058 u_int8_t satype; 7059 struct mbuf *n; 7060 int s; 7061 int error, len, ok; 7062 7063 /* map satype to proto */ 7064 satype = mhp->msg->sadb_msg_satype; 7065 proto = key_satype2proto(satype); 7066 if (proto == 0) { 7067 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7068 return key_senderror(so, m0, EINVAL); 7069 } 7070 7071 /* 7072 * If the requestor has insufficient socket-buffer space 7073 * for the entire chain, nobody gets any response to the DUMP. 7074 * XXX For now, only the requestor ever gets anything. 7075 * Moreover, if the requestor has any space at all, they receive 7076 * the entire chain, otherwise the request is refused with ENOBUFS. 7077 */ 7078 if (sbspace(&so->so_rcv) <= 0) { 7079 return key_senderror(so, m0, ENOBUFS); 7080 } 7081 7082 s = splsoftnet(); 7083 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7084 splx(s); 7085 7086 if (n == NULL) { 7087 return key_senderror(so, m0, ENOENT); 7088 } 7089 { 7090 uint64_t *ps = PFKEY_STAT_GETREF(); 7091 ps[PFKEY_STAT_IN_TOTAL]++; 7092 ps[PFKEY_STAT_IN_BYTES] += len; 7093 PFKEY_STAT_PUTREF(); 7094 } 7095 7096 /* 7097 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7098 * The requestor receives either the entire chain, or an 7099 * error message with ENOBUFS. 7100 * 7101 * sbappendaddrchain() takes the chain of entries, one 7102 * packet-record per SPD entry, prepends the key_src sockaddr 7103 * to each packet-record, links the sockaddr mbufs into a new 7104 * list of records, then appends the entire resulting 7105 * list to the requesting socket. 7106 */ 7107 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7108 SB_PRIO_ONESHOT_OVERFLOW); 7109 7110 if (!ok) { 7111 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7112 m_freem(n); 7113 return key_senderror(so, m0, ENOBUFS); 7114 } 7115 7116 m_freem(m0); 7117 return 0; 7118 } 7119 7120 /* 7121 * SADB_X_PROMISC processing 7122 * 7123 * m will always be freed. 7124 */ 7125 static int 7126 key_api_promisc(struct socket *so, struct mbuf *m, 7127 const struct sadb_msghdr *mhp) 7128 { 7129 int olen; 7130 7131 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7132 7133 if (olen < sizeof(struct sadb_msg)) { 7134 #if 1 7135 return key_senderror(so, m, EINVAL); 7136 #else 7137 m_freem(m); 7138 return 0; 7139 #endif 7140 } else if (olen == sizeof(struct sadb_msg)) { 7141 /* enable/disable promisc mode */ 7142 struct keycb *kp = (struct keycb *)sotorawcb(so); 7143 if (kp == NULL) 7144 return key_senderror(so, m, EINVAL); 7145 mhp->msg->sadb_msg_errno = 0; 7146 switch (mhp->msg->sadb_msg_satype) { 7147 case 0: 7148 case 1: 7149 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7150 break; 7151 default: 7152 return key_senderror(so, m, EINVAL); 7153 } 7154 7155 /* send the original message back to everyone */ 7156 mhp->msg->sadb_msg_errno = 0; 7157 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7158 } else { 7159 /* send packet as is */ 7160 7161 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7162 7163 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7164 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7165 } 7166 } 7167 7168 static int (*key_api_typesw[]) (struct socket *, struct mbuf *, 7169 const struct sadb_msghdr *) = { 7170 NULL, /* SADB_RESERVED */ 7171 key_api_getspi, /* SADB_GETSPI */ 7172 key_api_update, /* SADB_UPDATE */ 7173 key_api_add, /* SADB_ADD */ 7174 key_api_delete, /* SADB_DELETE */ 7175 key_api_get, /* SADB_GET */ 7176 key_api_acquire, /* SADB_ACQUIRE */ 7177 key_api_register, /* SADB_REGISTER */ 7178 NULL, /* SADB_EXPIRE */ 7179 key_api_flush, /* SADB_FLUSH */ 7180 key_api_dump, /* SADB_DUMP */ 7181 key_api_promisc, /* SADB_X_PROMISC */ 7182 NULL, /* SADB_X_PCHANGE */ 7183 key_api_spdadd, /* SADB_X_SPDUPDATE */ 7184 key_api_spdadd, /* SADB_X_SPDADD */ 7185 key_api_spddelete, /* SADB_X_SPDDELETE */ 7186 key_api_spdget, /* SADB_X_SPDGET */ 7187 NULL, /* SADB_X_SPDACQUIRE */ 7188 key_api_spddump, /* SADB_X_SPDDUMP */ 7189 key_api_spdflush, /* SADB_X_SPDFLUSH */ 7190 key_api_spdadd, /* SADB_X_SPDSETIDX */ 7191 NULL, /* SADB_X_SPDEXPIRE */ 7192 key_api_spddelete2, /* SADB_X_SPDDELETE2 */ 7193 key_api_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7194 }; 7195 7196 /* 7197 * parse sadb_msg buffer to process PFKEYv2, 7198 * and create a data to response if needed. 7199 * I think to be dealed with mbuf directly. 7200 * IN: 7201 * msgp : pointer to pointer to a received buffer pulluped. 7202 * This is rewrited to response. 7203 * so : pointer to socket. 7204 * OUT: 7205 * length for buffer to send to user process. 7206 */ 7207 int 7208 key_parse(struct mbuf *m, struct socket *so) 7209 { 7210 struct sadb_msg *msg; 7211 struct sadb_msghdr mh; 7212 u_int orglen; 7213 int error; 7214 7215 KASSERT(m != NULL); 7216 KASSERT(so != NULL); 7217 7218 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7219 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7220 IPSECLOG(LOG_DEBUG, "passed sadb_msg\n"); 7221 kdebug_sadb(msg); 7222 } 7223 #endif 7224 7225 if (m->m_len < sizeof(struct sadb_msg)) { 7226 m = m_pullup(m, sizeof(struct sadb_msg)); 7227 if (!m) 7228 return ENOBUFS; 7229 } 7230 msg = mtod(m, struct sadb_msg *); 7231 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7232 7233 if ((m->m_flags & M_PKTHDR) == 0 || 7234 m->m_pkthdr.len != orglen) { 7235 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7236 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7237 error = EINVAL; 7238 goto senderror; 7239 } 7240 7241 if (msg->sadb_msg_version != PF_KEY_V2) { 7242 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7243 msg->sadb_msg_version); 7244 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7245 error = EINVAL; 7246 goto senderror; 7247 } 7248 7249 if (msg->sadb_msg_type > SADB_MAX) { 7250 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7251 msg->sadb_msg_type); 7252 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7253 error = EINVAL; 7254 goto senderror; 7255 } 7256 7257 /* for old-fashioned code - should be nuked */ 7258 if (m->m_pkthdr.len > MCLBYTES) { 7259 m_freem(m); 7260 return ENOBUFS; 7261 } 7262 if (m->m_next) { 7263 struct mbuf *n; 7264 7265 MGETHDR(n, M_DONTWAIT, MT_DATA); 7266 if (n && m->m_pkthdr.len > MHLEN) { 7267 MCLGET(n, M_DONTWAIT); 7268 if ((n->m_flags & M_EXT) == 0) { 7269 m_free(n); 7270 n = NULL; 7271 } 7272 } 7273 if (!n) { 7274 m_freem(m); 7275 return ENOBUFS; 7276 } 7277 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7278 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7279 n->m_next = NULL; 7280 m_freem(m); 7281 m = n; 7282 } 7283 7284 /* align the mbuf chain so that extensions are in contiguous region. */ 7285 error = key_align(m, &mh); 7286 if (error) 7287 return error; 7288 7289 if (m->m_next) { /*XXX*/ 7290 m_freem(m); 7291 return ENOBUFS; 7292 } 7293 7294 msg = mh.msg; 7295 7296 /* check SA type */ 7297 switch (msg->sadb_msg_satype) { 7298 case SADB_SATYPE_UNSPEC: 7299 switch (msg->sadb_msg_type) { 7300 case SADB_GETSPI: 7301 case SADB_UPDATE: 7302 case SADB_ADD: 7303 case SADB_DELETE: 7304 case SADB_GET: 7305 case SADB_ACQUIRE: 7306 case SADB_EXPIRE: 7307 IPSECLOG(LOG_DEBUG, 7308 "must specify satype when msg type=%u.\n", 7309 msg->sadb_msg_type); 7310 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7311 error = EINVAL; 7312 goto senderror; 7313 } 7314 break; 7315 case SADB_SATYPE_AH: 7316 case SADB_SATYPE_ESP: 7317 case SADB_X_SATYPE_IPCOMP: 7318 case SADB_X_SATYPE_TCPSIGNATURE: 7319 switch (msg->sadb_msg_type) { 7320 case SADB_X_SPDADD: 7321 case SADB_X_SPDDELETE: 7322 case SADB_X_SPDGET: 7323 case SADB_X_SPDDUMP: 7324 case SADB_X_SPDFLUSH: 7325 case SADB_X_SPDSETIDX: 7326 case SADB_X_SPDUPDATE: 7327 case SADB_X_SPDDELETE2: 7328 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7329 msg->sadb_msg_type); 7330 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7331 error = EINVAL; 7332 goto senderror; 7333 } 7334 break; 7335 case SADB_SATYPE_RSVP: 7336 case SADB_SATYPE_OSPFV2: 7337 case SADB_SATYPE_RIPV2: 7338 case SADB_SATYPE_MIP: 7339 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7340 msg->sadb_msg_satype); 7341 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7342 error = EOPNOTSUPP; 7343 goto senderror; 7344 case 1: /* XXX: What does it do? */ 7345 if (msg->sadb_msg_type == SADB_X_PROMISC) 7346 break; 7347 /*FALLTHROUGH*/ 7348 default: 7349 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7350 msg->sadb_msg_satype); 7351 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7352 error = EINVAL; 7353 goto senderror; 7354 } 7355 7356 /* check field of upper layer protocol and address family */ 7357 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7358 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7359 struct sadb_address *src0, *dst0; 7360 u_int plen; 7361 7362 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7363 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7364 7365 /* check upper layer protocol */ 7366 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7367 IPSECLOG(LOG_DEBUG, "upper layer protocol mismatched.\n"); 7368 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7369 error = EINVAL; 7370 goto senderror; 7371 } 7372 7373 /* check family */ 7374 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7375 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7376 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7377 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7378 error = EINVAL; 7379 goto senderror; 7380 } 7381 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7382 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7383 IPSECLOG(LOG_DEBUG, 7384 "address struct size mismatched.\n"); 7385 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7386 error = EINVAL; 7387 goto senderror; 7388 } 7389 7390 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7391 case AF_INET: 7392 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7393 sizeof(struct sockaddr_in)) { 7394 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7395 error = EINVAL; 7396 goto senderror; 7397 } 7398 break; 7399 case AF_INET6: 7400 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7401 sizeof(struct sockaddr_in6)) { 7402 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7403 error = EINVAL; 7404 goto senderror; 7405 } 7406 break; 7407 default: 7408 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7409 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7410 error = EAFNOSUPPORT; 7411 goto senderror; 7412 } 7413 7414 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7415 case AF_INET: 7416 plen = sizeof(struct in_addr) << 3; 7417 break; 7418 case AF_INET6: 7419 plen = sizeof(struct in6_addr) << 3; 7420 break; 7421 default: 7422 plen = 0; /*fool gcc*/ 7423 break; 7424 } 7425 7426 /* check max prefix length */ 7427 if (src0->sadb_address_prefixlen > plen || 7428 dst0->sadb_address_prefixlen > plen) { 7429 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7430 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7431 error = EINVAL; 7432 goto senderror; 7433 } 7434 7435 /* 7436 * prefixlen == 0 is valid because there can be a case when 7437 * all addresses are matched. 7438 */ 7439 } 7440 7441 if (msg->sadb_msg_type >= __arraycount(key_api_typesw) || 7442 key_api_typesw[msg->sadb_msg_type] == NULL) { 7443 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7444 error = EINVAL; 7445 goto senderror; 7446 } 7447 7448 return (*key_api_typesw[msg->sadb_msg_type])(so, m, &mh); 7449 7450 senderror: 7451 return key_senderror(so, m, error); 7452 } 7453 7454 static int 7455 key_senderror(struct socket *so, struct mbuf *m, int code) 7456 { 7457 struct sadb_msg *msg; 7458 7459 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7460 7461 msg = mtod(m, struct sadb_msg *); 7462 msg->sadb_msg_errno = code; 7463 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7464 } 7465 7466 /* 7467 * set the pointer to each header into message buffer. 7468 * m will be freed on error. 7469 * XXX larger-than-MCLBYTES extension? 7470 */ 7471 static int 7472 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7473 { 7474 struct mbuf *n; 7475 struct sadb_ext *ext; 7476 size_t off, end; 7477 int extlen; 7478 int toff; 7479 7480 KASSERT(m != NULL); 7481 KASSERT(mhp != NULL); 7482 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7483 7484 /* initialize */ 7485 memset(mhp, 0, sizeof(*mhp)); 7486 7487 mhp->msg = mtod(m, struct sadb_msg *); 7488 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7489 7490 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7491 extlen = end; /*just in case extlen is not updated*/ 7492 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7493 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7494 if (!n) { 7495 /* m is already freed */ 7496 return ENOBUFS; 7497 } 7498 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7499 7500 /* set pointer */ 7501 switch (ext->sadb_ext_type) { 7502 case SADB_EXT_SA: 7503 case SADB_EXT_ADDRESS_SRC: 7504 case SADB_EXT_ADDRESS_DST: 7505 case SADB_EXT_ADDRESS_PROXY: 7506 case SADB_EXT_LIFETIME_CURRENT: 7507 case SADB_EXT_LIFETIME_HARD: 7508 case SADB_EXT_LIFETIME_SOFT: 7509 case SADB_EXT_KEY_AUTH: 7510 case SADB_EXT_KEY_ENCRYPT: 7511 case SADB_EXT_IDENTITY_SRC: 7512 case SADB_EXT_IDENTITY_DST: 7513 case SADB_EXT_SENSITIVITY: 7514 case SADB_EXT_PROPOSAL: 7515 case SADB_EXT_SUPPORTED_AUTH: 7516 case SADB_EXT_SUPPORTED_ENCRYPT: 7517 case SADB_EXT_SPIRANGE: 7518 case SADB_X_EXT_POLICY: 7519 case SADB_X_EXT_SA2: 7520 case SADB_X_EXT_NAT_T_TYPE: 7521 case SADB_X_EXT_NAT_T_SPORT: 7522 case SADB_X_EXT_NAT_T_DPORT: 7523 case SADB_X_EXT_NAT_T_OAI: 7524 case SADB_X_EXT_NAT_T_OAR: 7525 case SADB_X_EXT_NAT_T_FRAG: 7526 /* duplicate check */ 7527 /* 7528 * XXX Are there duplication payloads of either 7529 * KEY_AUTH or KEY_ENCRYPT ? 7530 */ 7531 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7532 IPSECLOG(LOG_DEBUG, 7533 "duplicate ext_type %u is passed.\n", 7534 ext->sadb_ext_type); 7535 m_freem(m); 7536 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7537 return EINVAL; 7538 } 7539 break; 7540 default: 7541 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 7542 ext->sadb_ext_type); 7543 m_freem(m); 7544 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7545 return EINVAL; 7546 } 7547 7548 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7549 7550 if (key_validate_ext(ext, extlen)) { 7551 m_freem(m); 7552 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7553 return EINVAL; 7554 } 7555 7556 n = m_pulldown(m, off, extlen, &toff); 7557 if (!n) { 7558 /* m is already freed */ 7559 return ENOBUFS; 7560 } 7561 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7562 7563 mhp->ext[ext->sadb_ext_type] = ext; 7564 mhp->extoff[ext->sadb_ext_type] = off; 7565 mhp->extlen[ext->sadb_ext_type] = extlen; 7566 } 7567 7568 if (off != end) { 7569 m_freem(m); 7570 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7571 return EINVAL; 7572 } 7573 7574 return 0; 7575 } 7576 7577 static int 7578 key_validate_ext(const struct sadb_ext *ext, int len) 7579 { 7580 const struct sockaddr *sa; 7581 enum { NONE, ADDR } checktype = NONE; 7582 int baselen = 0; 7583 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7584 7585 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7586 return EINVAL; 7587 7588 /* if it does not match minimum/maximum length, bail */ 7589 if (ext->sadb_ext_type >= __arraycount(minsize) || 7590 ext->sadb_ext_type >= __arraycount(maxsize)) 7591 return EINVAL; 7592 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7593 return EINVAL; 7594 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7595 return EINVAL; 7596 7597 /* more checks based on sadb_ext_type XXX need more */ 7598 switch (ext->sadb_ext_type) { 7599 case SADB_EXT_ADDRESS_SRC: 7600 case SADB_EXT_ADDRESS_DST: 7601 case SADB_EXT_ADDRESS_PROXY: 7602 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7603 checktype = ADDR; 7604 break; 7605 case SADB_EXT_IDENTITY_SRC: 7606 case SADB_EXT_IDENTITY_DST: 7607 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7608 SADB_X_IDENTTYPE_ADDR) { 7609 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7610 checktype = ADDR; 7611 } else 7612 checktype = NONE; 7613 break; 7614 default: 7615 checktype = NONE; 7616 break; 7617 } 7618 7619 switch (checktype) { 7620 case NONE: 7621 break; 7622 case ADDR: 7623 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7624 if (len < baselen + sal) 7625 return EINVAL; 7626 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7627 return EINVAL; 7628 break; 7629 } 7630 7631 return 0; 7632 } 7633 7634 static int 7635 key_do_init(void) 7636 { 7637 int i, error; 7638 7639 mutex_init(&key_mtx, MUTEX_DEFAULT, IPL_NONE); 7640 7641 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7642 7643 callout_init(&key_timehandler_ch, 0); 7644 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 7645 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 7646 if (error != 0) 7647 panic("%s: workqueue_create failed (%d)\n", __func__, error); 7648 7649 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7650 LIST_INIT(&sptree[i]); 7651 } 7652 7653 LIST_INIT(&sahtree); 7654 7655 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7656 LIST_INIT(®tree[i]); 7657 } 7658 7659 #ifndef IPSEC_NONBLOCK_ACQUIRE 7660 LIST_INIT(&acqtree); 7661 #endif 7662 #ifdef notyet 7663 LIST_INIT(&spacqtree); 7664 #endif 7665 7666 /* system default */ 7667 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7668 ip4_def_policy.refcnt++; /*never reclaim this*/ 7669 7670 #ifdef INET6 7671 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7672 ip6_def_policy.refcnt++; /*never reclaim this*/ 7673 #endif 7674 7675 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7676 7677 /* initialize key statistics */ 7678 keystat.getspi_count = 1; 7679 7680 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7681 7682 return (0); 7683 } 7684 7685 void 7686 key_init(void) 7687 { 7688 static ONCE_DECL(key_init_once); 7689 7690 sysctl_net_keyv2_setup(NULL); 7691 sysctl_net_key_compat_setup(NULL); 7692 7693 RUN_ONCE(&key_init_once, key_do_init); 7694 } 7695 7696 /* 7697 * XXX: maybe This function is called after INBOUND IPsec processing. 7698 * 7699 * Special check for tunnel-mode packets. 7700 * We must make some checks for consistency between inner and outer IP header. 7701 * 7702 * xxx more checks to be provided 7703 */ 7704 int 7705 key_checktunnelsanity( 7706 struct secasvar *sav, 7707 u_int family, 7708 void *src, 7709 void *dst 7710 ) 7711 { 7712 7713 KASSERT(sav->sah != NULL); 7714 7715 /* XXX: check inner IP header */ 7716 7717 return 1; 7718 } 7719 7720 #if 0 7721 #define hostnamelen strlen(hostname) 7722 7723 /* 7724 * Get FQDN for the host. 7725 * If the administrator configured hostname (by hostname(1)) without 7726 * domain name, returns nothing. 7727 */ 7728 static const char * 7729 key_getfqdn(void) 7730 { 7731 int i; 7732 int hasdot; 7733 static char fqdn[MAXHOSTNAMELEN + 1]; 7734 7735 if (!hostnamelen) 7736 return NULL; 7737 7738 /* check if it comes with domain name. */ 7739 hasdot = 0; 7740 for (i = 0; i < hostnamelen; i++) { 7741 if (hostname[i] == '.') 7742 hasdot++; 7743 } 7744 if (!hasdot) 7745 return NULL; 7746 7747 /* NOTE: hostname may not be NUL-terminated. */ 7748 memset(fqdn, 0, sizeof(fqdn)); 7749 memcpy(fqdn, hostname, hostnamelen); 7750 fqdn[hostnamelen] = '\0'; 7751 return fqdn; 7752 } 7753 7754 /* 7755 * get username@FQDN for the host/user. 7756 */ 7757 static const char * 7758 key_getuserfqdn(void) 7759 { 7760 const char *host; 7761 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7762 struct proc *p = curproc; 7763 char *q; 7764 7765 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7766 return NULL; 7767 if (!(host = key_getfqdn())) 7768 return NULL; 7769 7770 /* NOTE: s_login may not be-NUL terminated. */ 7771 memset(userfqdn, 0, sizeof(userfqdn)); 7772 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7773 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7774 q = userfqdn + strlen(userfqdn); 7775 *q++ = '@'; 7776 memcpy(q, host, strlen(host)); 7777 q += strlen(host); 7778 *q++ = '\0'; 7779 7780 return userfqdn; 7781 } 7782 #endif 7783 7784 /* record data transfer on SA, and update timestamps */ 7785 void 7786 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7787 { 7788 7789 KASSERT(sav != NULL); 7790 KASSERT(m != NULL); 7791 if (!sav->lft_c) 7792 return; 7793 7794 /* 7795 * XXX Currently, there is a difference of bytes size 7796 * between inbound and outbound processing. 7797 */ 7798 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7799 /* to check bytes lifetime is done in key_timehandler(). */ 7800 7801 /* 7802 * We use the number of packets as the unit of 7803 * sadb_lifetime_allocations. We increment the variable 7804 * whenever {esp,ah}_{in,out}put is called. 7805 */ 7806 sav->lft_c->sadb_lifetime_allocations++; 7807 /* XXX check for expires? */ 7808 7809 /* 7810 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7811 * in seconds. HARD and SOFT lifetime are measured by the time 7812 * difference (again in seconds) from sadb_lifetime_usetime. 7813 * 7814 * usetime 7815 * v expire expire 7816 * -----+-----+--------+---> t 7817 * <--------------> HARD 7818 * <-----> SOFT 7819 */ 7820 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7821 /* XXX check for expires? */ 7822 7823 return; 7824 } 7825 7826 /* dumb version */ 7827 void 7828 key_sa_routechange(struct sockaddr *dst) 7829 { 7830 struct secashead *sah; 7831 struct route *ro; 7832 const struct sockaddr *sa; 7833 7834 LIST_FOREACH(sah, &sahtree, chain) { 7835 ro = &sah->sa_route; 7836 sa = rtcache_getdst(ro); 7837 if (sa != NULL && dst->sa_len == sa->sa_len && 7838 memcmp(dst, sa, dst->sa_len) == 0) 7839 rtcache_free(ro); 7840 } 7841 7842 return; 7843 } 7844 7845 static void 7846 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7847 { 7848 7849 KASSERT(sav != NULL); 7850 7851 if (sav->state == state) 7852 return; 7853 7854 KASSERT(__LIST_CHAINED(sav)); 7855 LIST_REMOVE(sav, chain); 7856 7857 sav->state = state; 7858 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7859 } 7860 7861 /* XXX too much? */ 7862 static struct mbuf * 7863 key_alloc_mbuf(int l) 7864 { 7865 struct mbuf *m = NULL, *n; 7866 int len, t; 7867 7868 len = l; 7869 while (len > 0) { 7870 MGET(n, M_DONTWAIT, MT_DATA); 7871 if (n && len > MLEN) 7872 MCLGET(n, M_DONTWAIT); 7873 if (!n) { 7874 m_freem(m); 7875 return NULL; 7876 } 7877 7878 n->m_next = NULL; 7879 n->m_len = 0; 7880 n->m_len = M_TRAILINGSPACE(n); 7881 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7882 if (n->m_len > len) { 7883 t = (n->m_len - len) & ~(sizeof(long) - 1); 7884 n->m_data += t; 7885 n->m_len = len; 7886 } 7887 7888 len -= n->m_len; 7889 7890 if (m) 7891 m_cat(m, n); 7892 else 7893 m = n; 7894 } 7895 7896 return m; 7897 } 7898 7899 static struct mbuf * 7900 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7901 { 7902 struct secashead *sah; 7903 struct secasvar *sav; 7904 u_int16_t proto; 7905 u_int8_t satype; 7906 u_int8_t state; 7907 int cnt; 7908 struct mbuf *m, *n; 7909 7910 /* map satype to proto */ 7911 proto = key_satype2proto(req_satype); 7912 if (proto == 0) { 7913 *errorp = EINVAL; 7914 return (NULL); 7915 } 7916 7917 /* count sav entries to be sent to the userland. */ 7918 cnt = 0; 7919 LIST_FOREACH(sah, &sahtree, chain) { 7920 if (req_satype != SADB_SATYPE_UNSPEC && 7921 proto != sah->saidx.proto) 7922 continue; 7923 7924 SASTATE_ANY_FOREACH(state) { 7925 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7926 cnt++; 7927 } 7928 } 7929 } 7930 7931 if (cnt == 0) { 7932 *errorp = ENOENT; 7933 return (NULL); 7934 } 7935 7936 /* send this to the userland, one at a time. */ 7937 m = NULL; 7938 LIST_FOREACH(sah, &sahtree, chain) { 7939 if (req_satype != SADB_SATYPE_UNSPEC && 7940 proto != sah->saidx.proto) 7941 continue; 7942 7943 /* map proto to satype */ 7944 satype = key_proto2satype(sah->saidx.proto); 7945 if (satype == 0) { 7946 m_freem(m); 7947 *errorp = EINVAL; 7948 return (NULL); 7949 } 7950 7951 SASTATE_ANY_FOREACH(state) { 7952 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7953 n = key_setdumpsa(sav, SADB_DUMP, satype, 7954 --cnt, pid); 7955 if (!n) { 7956 m_freem(m); 7957 *errorp = ENOBUFS; 7958 return (NULL); 7959 } 7960 7961 if (!m) 7962 m = n; 7963 else 7964 m_cat(m, n); 7965 } 7966 } 7967 } 7968 7969 if (!m) { 7970 *errorp = EINVAL; 7971 return (NULL); 7972 } 7973 7974 if ((m->m_flags & M_PKTHDR) != 0) { 7975 m->m_pkthdr.len = 0; 7976 for (n = m; n; n = n->m_next) 7977 m->m_pkthdr.len += n->m_len; 7978 } 7979 7980 *errorp = 0; 7981 return (m); 7982 } 7983 7984 static struct mbuf * 7985 key_setspddump(int *errorp, pid_t pid) 7986 { 7987 struct secpolicy *sp; 7988 int cnt; 7989 u_int dir; 7990 struct mbuf *m, *n; 7991 7992 /* search SPD entry and get buffer size. */ 7993 cnt = 0; 7994 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7995 LIST_FOREACH(sp, &sptree[dir], chain) { 7996 cnt++; 7997 } 7998 } 7999 8000 if (cnt == 0) { 8001 *errorp = ENOENT; 8002 return (NULL); 8003 } 8004 8005 m = NULL; 8006 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8007 LIST_FOREACH(sp, &sptree[dir], chain) { 8008 --cnt; 8009 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8010 8011 if (!n) { 8012 *errorp = ENOBUFS; 8013 m_freem(m); 8014 return (NULL); 8015 } 8016 if (!m) 8017 m = n; 8018 else { 8019 m->m_pkthdr.len += n->m_pkthdr.len; 8020 m_cat(m, n); 8021 } 8022 } 8023 } 8024 8025 *errorp = 0; 8026 return (m); 8027 } 8028 8029 int 8030 key_get_used(void) { 8031 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8032 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8033 } 8034 8035 void 8036 key_update_used(void) 8037 { 8038 switch (ipsec_enabled) { 8039 default: 8040 case 0: 8041 #ifdef notyet 8042 /* XXX: racy */ 8043 ipsec_used = 0; 8044 #endif 8045 break; 8046 case 1: 8047 #ifndef notyet 8048 /* XXX: racy */ 8049 if (!ipsec_used) 8050 #endif 8051 ipsec_used = key_get_used(); 8052 break; 8053 case 2: 8054 ipsec_used = 1; 8055 break; 8056 } 8057 } 8058 8059 static int 8060 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8061 { 8062 struct mbuf *m, *n; 8063 int err2 = 0; 8064 char *p, *ep; 8065 size_t len; 8066 int s, error; 8067 8068 if (newp) 8069 return (EPERM); 8070 if (namelen != 1) 8071 return (EINVAL); 8072 8073 s = splsoftnet(); 8074 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8075 splx(s); 8076 if (!m) 8077 return (error); 8078 if (!oldp) 8079 *oldlenp = m->m_pkthdr.len; 8080 else { 8081 p = oldp; 8082 if (*oldlenp < m->m_pkthdr.len) { 8083 err2 = ENOMEM; 8084 ep = p + *oldlenp; 8085 } else { 8086 *oldlenp = m->m_pkthdr.len; 8087 ep = p + m->m_pkthdr.len; 8088 } 8089 for (n = m; n; n = n->m_next) { 8090 len = (ep - p < n->m_len) ? 8091 ep - p : n->m_len; 8092 error = copyout(mtod(n, const void *), p, len); 8093 p += len; 8094 if (error) 8095 break; 8096 } 8097 if (error == 0) 8098 error = err2; 8099 } 8100 m_freem(m); 8101 8102 return (error); 8103 } 8104 8105 static int 8106 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8107 { 8108 struct mbuf *m, *n; 8109 int err2 = 0; 8110 char *p, *ep; 8111 size_t len; 8112 int s, error; 8113 8114 if (newp) 8115 return (EPERM); 8116 if (namelen != 0) 8117 return (EINVAL); 8118 8119 s = splsoftnet(); 8120 m = key_setspddump(&error, l->l_proc->p_pid); 8121 splx(s); 8122 if (!m) 8123 return (error); 8124 if (!oldp) 8125 *oldlenp = m->m_pkthdr.len; 8126 else { 8127 p = oldp; 8128 if (*oldlenp < m->m_pkthdr.len) { 8129 err2 = ENOMEM; 8130 ep = p + *oldlenp; 8131 } else { 8132 *oldlenp = m->m_pkthdr.len; 8133 ep = p + m->m_pkthdr.len; 8134 } 8135 for (n = m; n; n = n->m_next) { 8136 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8137 error = copyout(mtod(n, const void *), p, len); 8138 p += len; 8139 if (error) 8140 break; 8141 } 8142 if (error == 0) 8143 error = err2; 8144 } 8145 m_freem(m); 8146 8147 return (error); 8148 } 8149 8150 /* 8151 * Create sysctl tree for native IPSEC key knobs, originally 8152 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8153 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8154 * and in any case the part of our sysctl namespace used for dumping the 8155 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8156 * namespace, for API reasons. 8157 * 8158 * Pending a consensus on the right way to fix this, add a level of 8159 * indirection in how we number the `native' IPSEC key nodes; 8160 * and (as requested by Andrew Brown) move registration of the 8161 * KAME-compatible names to a separate function. 8162 */ 8163 #if 0 8164 # define IPSEC_PFKEY PF_KEY_V2 8165 # define IPSEC_PFKEY_NAME "keyv2" 8166 #else 8167 # define IPSEC_PFKEY PF_KEY 8168 # define IPSEC_PFKEY_NAME "key" 8169 #endif 8170 8171 static int 8172 sysctl_net_key_stats(SYSCTLFN_ARGS) 8173 { 8174 8175 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8176 } 8177 8178 static void 8179 sysctl_net_keyv2_setup(struct sysctllog **clog) 8180 { 8181 8182 sysctl_createv(clog, 0, NULL, NULL, 8183 CTLFLAG_PERMANENT, 8184 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8185 NULL, 0, NULL, 0, 8186 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8187 8188 sysctl_createv(clog, 0, NULL, NULL, 8189 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8190 CTLTYPE_INT, "debug", NULL, 8191 NULL, 0, &key_debug_level, 0, 8192 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8193 sysctl_createv(clog, 0, NULL, NULL, 8194 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8195 CTLTYPE_INT, "spi_try", NULL, 8196 NULL, 0, &key_spi_trycnt, 0, 8197 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8198 sysctl_createv(clog, 0, NULL, NULL, 8199 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8200 CTLTYPE_INT, "spi_min_value", NULL, 8201 NULL, 0, &key_spi_minval, 0, 8202 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8203 sysctl_createv(clog, 0, NULL, NULL, 8204 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8205 CTLTYPE_INT, "spi_max_value", NULL, 8206 NULL, 0, &key_spi_maxval, 0, 8207 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8208 sysctl_createv(clog, 0, NULL, NULL, 8209 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8210 CTLTYPE_INT, "random_int", NULL, 8211 NULL, 0, &key_int_random, 0, 8212 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8213 sysctl_createv(clog, 0, NULL, NULL, 8214 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8215 CTLTYPE_INT, "larval_lifetime", NULL, 8216 NULL, 0, &key_larval_lifetime, 0, 8217 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8218 sysctl_createv(clog, 0, NULL, NULL, 8219 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8220 CTLTYPE_INT, "blockacq_count", NULL, 8221 NULL, 0, &key_blockacq_count, 0, 8222 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8223 sysctl_createv(clog, 0, NULL, NULL, 8224 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8225 CTLTYPE_INT, "blockacq_lifetime", NULL, 8226 NULL, 0, &key_blockacq_lifetime, 0, 8227 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8228 sysctl_createv(clog, 0, NULL, NULL, 8229 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8230 CTLTYPE_INT, "esp_keymin", NULL, 8231 NULL, 0, &ipsec_esp_keymin, 0, 8232 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8233 sysctl_createv(clog, 0, NULL, NULL, 8234 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8235 CTLTYPE_INT, "prefered_oldsa", NULL, 8236 NULL, 0, &key_prefered_oldsa, 0, 8237 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8238 sysctl_createv(clog, 0, NULL, NULL, 8239 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8240 CTLTYPE_INT, "esp_auth", NULL, 8241 NULL, 0, &ipsec_esp_auth, 0, 8242 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8243 sysctl_createv(clog, 0, NULL, NULL, 8244 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8245 CTLTYPE_INT, "ah_keymin", NULL, 8246 NULL, 0, &ipsec_ah_keymin, 0, 8247 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8248 sysctl_createv(clog, 0, NULL, NULL, 8249 CTLFLAG_PERMANENT, 8250 CTLTYPE_STRUCT, "stats", 8251 SYSCTL_DESCR("PF_KEY statistics"), 8252 sysctl_net_key_stats, 0, NULL, 0, 8253 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8254 } 8255 8256 /* 8257 * Register sysctl names used by setkey(8). For historical reasons, 8258 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8259 * for both IPSEC and KAME IPSEC. 8260 */ 8261 static void 8262 sysctl_net_key_compat_setup(struct sysctllog **clog) 8263 { 8264 8265 sysctl_createv(clog, 0, NULL, NULL, 8266 CTLFLAG_PERMANENT, 8267 CTLTYPE_NODE, "key", NULL, 8268 NULL, 0, NULL, 0, 8269 CTL_NET, PF_KEY, CTL_EOL); 8270 8271 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8272 sysctl_createv(clog, 0, NULL, NULL, 8273 CTLFLAG_PERMANENT, 8274 CTLTYPE_STRUCT, "dumpsa", NULL, 8275 sysctl_net_key_dumpsa, 0, NULL, 0, 8276 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8277 sysctl_createv(clog, 0, NULL, NULL, 8278 CTLFLAG_PERMANENT, 8279 CTLTYPE_STRUCT, "dumpsp", NULL, 8280 sysctl_net_key_dumpsp, 0, NULL, 0, 8281 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8282 } 8283
Indexes created Mon Sep 22 13:09:51 GMT 2025