key.c revision 1.176
1 /* $NetBSD: key.c,v 1.176 2017/07/11 10:06:07 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 1.176 2017/07/11 10:06:07 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 bool 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 static void 976 key_sendup_message_delete(struct secasvar *sav) 977 { 978 struct mbuf *m, *result = 0; 979 uint8_t satype; 980 981 satype = key_proto2satype(sav->sah->saidx.proto); 982 if (satype == 0) 983 goto msgfail; 984 985 m = key_setsadbmsg(SADB_DELETE, 0, satype, 0, 0, sav->refcnt - 1); 986 if (m == NULL) 987 goto msgfail; 988 result = m; 989 990 /* set sadb_address for saidx's. */ 991 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 992 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 993 if (m == NULL) 994 goto msgfail; 995 m_cat(result, m); 996 997 /* set sadb_address for saidx's. */ 998 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.src.sa, 999 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 1000 if (m == NULL) 1001 goto msgfail; 1002 m_cat(result, m); 1003 1004 /* create SA extension */ 1005 m = key_setsadbsa(sav); 1006 if (m == NULL) 1007 goto msgfail; 1008 m_cat(result, m); 1009 1010 if (result->m_len < sizeof(struct sadb_msg)) { 1011 result = m_pullup(result, sizeof(struct sadb_msg)); 1012 if (result == NULL) 1013 goto msgfail; 1014 } 1015 1016 result->m_pkthdr.len = 0; 1017 for (m = result; m; m = m->m_next) 1018 result->m_pkthdr.len += m->m_len; 1019 mtod(result, struct sadb_msg *)->sadb_msg_len = 1020 PFKEY_UNIT64(result->m_pkthdr.len); 1021 1022 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1023 result = NULL; 1024 msgfail: 1025 if (result) 1026 m_freem(result); 1027 } 1028 1029 /* 1030 * searching SAD with direction, protocol, mode and state. 1031 * called by key_allocsa_policy(). 1032 * OUT: 1033 * NULL : not found 1034 * others : found, pointer to a SA. 1035 */ 1036 static struct secasvar * 1037 key_do_allocsa_policy(struct secashead *sah, u_int state) 1038 { 1039 struct secasvar *sav, *candidate, *d; 1040 1041 /* initilize */ 1042 candidate = NULL; 1043 1044 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1045 /* sanity check */ 1046 KEY_CHKSASTATE(sav->state, state); 1047 1048 /* initialize */ 1049 if (candidate == NULL) { 1050 candidate = sav; 1051 continue; 1052 } 1053 1054 /* Which SA is the better ? */ 1055 1056 /* sanity check 2 */ 1057 KASSERT(candidate->lft_c != NULL); 1058 KASSERT(sav->lft_c != NULL); 1059 1060 /* What the best method is to compare ? */ 1061 if (key_prefered_oldsa) { 1062 if (candidate->lft_c->sadb_lifetime_addtime > 1063 sav->lft_c->sadb_lifetime_addtime) { 1064 candidate = sav; 1065 } 1066 continue; 1067 /*NOTREACHED*/ 1068 } 1069 1070 /* prefered new sa rather than old sa */ 1071 if (candidate->lft_c->sadb_lifetime_addtime < 1072 sav->lft_c->sadb_lifetime_addtime) { 1073 d = candidate; 1074 candidate = sav; 1075 } else 1076 d = sav; 1077 1078 /* 1079 * prepared to delete the SA when there is more 1080 * suitable candidate and the lifetime of the SA is not 1081 * permanent. 1082 */ 1083 if (d->lft_c->sadb_lifetime_addtime != 0) { 1084 key_sa_chgstate(d, SADB_SASTATE_DEAD); 1085 KASSERT(d->refcnt > 0); 1086 key_sendup_message_delete(d); 1087 KEY_FREESAV(&d); 1088 } 1089 } 1090 1091 if (candidate) { 1092 SA_ADDREF(candidate); 1093 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1094 "DP cause refcnt++:%d SA:%p\n", 1095 candidate->refcnt, candidate); 1096 } 1097 return candidate; 1098 } 1099 1100 /* 1101 * allocating a usable SA entry for a *INBOUND* packet. 1102 * Must call key_freesav() later. 1103 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1104 * NULL: not found, or error occurred. 1105 * 1106 * In the comparison, no source address is used--for RFC2401 conformance. 1107 * To quote, from section 4.1: 1108 * A security association is uniquely identified by a triple consisting 1109 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1110 * security protocol (AH or ESP) identifier. 1111 * Note that, however, we do need to keep source address in IPsec SA. 1112 * IKE specification and PF_KEY specification do assume that we 1113 * keep source address in IPsec SA. We see a tricky situation here. 1114 * 1115 * sport and dport are used for NAT-T. network order is always used. 1116 */ 1117 struct secasvar * 1118 key_lookup_sa( 1119 const union sockaddr_union *dst, 1120 u_int proto, 1121 u_int32_t spi, 1122 u_int16_t sport, 1123 u_int16_t dport, 1124 const char* where, int tag) 1125 { 1126 struct secashead *sah; 1127 struct secasvar *sav; 1128 u_int stateidx, state; 1129 const u_int *saorder_state_valid; 1130 int arraysize, chkport; 1131 int s; 1132 1133 int must_check_spi = 1; 1134 int must_check_alg = 0; 1135 u_int16_t cpi = 0; 1136 u_int8_t algo = 0; 1137 1138 if ((sport != 0) && (dport != 0)) 1139 chkport = PORT_STRICT; 1140 else 1141 chkport = PORT_NONE; 1142 1143 KASSERT(dst != NULL); 1144 1145 /* 1146 * XXX IPCOMP case 1147 * We use cpi to define spi here. In the case where cpi <= 1148 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1149 * the real spi. In this case, don't check the spi but check the 1150 * algorithm 1151 */ 1152 1153 if (proto == IPPROTO_IPCOMP) { 1154 u_int32_t tmp; 1155 tmp = ntohl(spi); 1156 cpi = (u_int16_t) tmp; 1157 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1158 algo = (u_int8_t) cpi; 1159 must_check_spi = 0; 1160 must_check_alg = 1; 1161 } 1162 } 1163 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1164 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1165 where, tag, must_check_spi, must_check_alg); 1166 1167 1168 /* 1169 * searching SAD. 1170 * XXX: to be checked internal IP header somewhere. Also when 1171 * IPsec tunnel packet is received. But ESP tunnel mode is 1172 * encrypted so we can't check internal IP header. 1173 */ 1174 s = splsoftnet(); /*called from softclock()*/ 1175 if (key_prefered_oldsa) { 1176 saorder_state_valid = saorder_state_valid_prefer_old; 1177 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1178 } else { 1179 saorder_state_valid = saorder_state_valid_prefer_new; 1180 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1181 } 1182 LIST_FOREACH(sah, &sahtree, chain) { 1183 /* search valid state */ 1184 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1185 state = saorder_state_valid[stateidx]; 1186 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1187 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1188 "try match spi %#x, %#x\n", 1189 ntohl(spi), ntohl(sav->spi)); 1190 /* sanity check */ 1191 KEY_CHKSASTATE(sav->state, state); 1192 /* do not return entries w/ unusable state */ 1193 if (!SADB_SASTATE_USABLE_P(sav)) { 1194 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1195 "bad state %d\n", sav->state); 1196 continue; 1197 } 1198 if (proto != sav->sah->saidx.proto) { 1199 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1200 "proto fail %d != %d\n", 1201 proto, sav->sah->saidx.proto); 1202 continue; 1203 } 1204 if (must_check_spi && spi != sav->spi) { 1205 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1206 "spi fail %#x != %#x\n", 1207 ntohl(spi), ntohl(sav->spi)); 1208 continue; 1209 } 1210 /* XXX only on the ipcomp case */ 1211 if (must_check_alg && algo != sav->alg_comp) { 1212 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1213 "algo fail %d != %d\n", 1214 algo, sav->alg_comp); 1215 continue; 1216 } 1217 1218 #if 0 /* don't check src */ 1219 /* Fix port in src->sa */ 1220 1221 /* check src address */ 1222 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1223 continue; 1224 #endif 1225 /* fix port of dst address XXX*/ 1226 key_porttosaddr(__UNCONST(dst), dport); 1227 /* check dst address */ 1228 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1229 continue; 1230 SA_ADDREF2(sav, where, tag); 1231 goto done; 1232 } 1233 } 1234 } 1235 sav = NULL; 1236 done: 1237 splx(s); 1238 1239 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1240 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1241 return sav; 1242 } 1243 1244 void 1245 key_sp_ref(struct secpolicy *sp, const char* where, int tag) 1246 { 1247 1248 SP_ADDREF2(sp, where, tag); 1249 1250 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1251 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1252 sp, sp->id, where, tag, sp->refcnt); 1253 } 1254 1255 /* 1256 * Must be called after calling key_lookup_sp*(). 1257 * For both the packet without socket and key_freeso(). 1258 */ 1259 void 1260 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1261 { 1262 struct secpolicy *sp = *spp; 1263 unsigned int nv; 1264 1265 KASSERT(sp != NULL); 1266 1267 SP_DELREF2(sp, nv, where, tag); 1268 1269 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1270 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1271 sp, sp->id, where, tag, nv); 1272 1273 if (nv == 0) { 1274 *spp = NULL; 1275 key_delsp(sp); 1276 } 1277 } 1278 1279 #if 0 1280 /* 1281 * Must be called after calling key_lookup_sp*(). 1282 * For the packet with socket. 1283 */ 1284 static void 1285 key_freeso(struct socket *so) 1286 { 1287 /* sanity check */ 1288 KASSERT(so != NULL); 1289 1290 switch (so->so_proto->pr_domain->dom_family) { 1291 #ifdef INET 1292 case PF_INET: 1293 { 1294 struct inpcb *pcb = sotoinpcb(so); 1295 1296 /* Does it have a PCB ? */ 1297 if (pcb == NULL) 1298 return; 1299 1300 struct inpcbpolicy *sp = pcb->inp_sp; 1301 key_freesp_so(&sp->sp_in); 1302 key_freesp_so(&sp->sp_out); 1303 } 1304 break; 1305 #endif 1306 #ifdef INET6 1307 case PF_INET6: 1308 { 1309 #ifdef HAVE_NRL_INPCB 1310 struct inpcb *pcb = sotoinpcb(so); 1311 struct inpcbpolicy *sp = pcb->inp_sp; 1312 1313 /* Does it have a PCB ? */ 1314 if (pcb == NULL) 1315 return; 1316 key_freesp_so(&sp->sp_in); 1317 key_freesp_so(&sp->sp_out); 1318 #else 1319 struct in6pcb *pcb = sotoin6pcb(so); 1320 1321 /* Does it have a PCB ? */ 1322 if (pcb == NULL) 1323 return; 1324 key_freesp_so(&pcb->in6p_sp->sp_in); 1325 key_freesp_so(&pcb->in6p_sp->sp_out); 1326 #endif 1327 } 1328 break; 1329 #endif /* INET6 */ 1330 default: 1331 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1332 so->so_proto->pr_domain->dom_family); 1333 return; 1334 } 1335 } 1336 1337 static void 1338 key_freesp_so(struct secpolicy **sp) 1339 { 1340 1341 KASSERT(sp != NULL); 1342 KASSERT(*sp != NULL); 1343 1344 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1345 (*sp)->policy == IPSEC_POLICY_BYPASS) 1346 return; 1347 1348 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1349 "invalid policy %u", (*sp)->policy); 1350 KEY_FREESP(sp); 1351 } 1352 #endif 1353 1354 /* 1355 * Must be called after calling key_lookup_sa(). 1356 * This function is called by key_freesp() to free some SA allocated 1357 * for a policy. 1358 */ 1359 void 1360 key_freesav(struct secasvar **psav, const char* where, int tag) 1361 { 1362 struct secasvar *sav = *psav; 1363 unsigned int nv; 1364 1365 KASSERT(sav != NULL); 1366 1367 SA_DELREF2(sav, nv, where, tag); 1368 1369 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1370 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1371 sav, (u_long)ntohl(sav->spi), where, tag, nv); 1372 1373 if (nv == 0) { 1374 *psav = NULL; 1375 1376 /* remove from SA header */ 1377 KASSERT(__LIST_CHAINED(sav)); 1378 LIST_REMOVE(sav, chain); 1379 1380 key_delsav(sav); 1381 } 1382 } 1383 1384 /* %%% SPD management */ 1385 /* 1386 * free security policy entry. 1387 */ 1388 static void 1389 key_delsp(struct secpolicy *sp) 1390 { 1391 int s; 1392 1393 KASSERT(sp != NULL); 1394 1395 key_sp_dead(sp); 1396 1397 KASSERTMSG(sp->refcnt == 0, 1398 "SP with references deleted (refcnt %u)", sp->refcnt); 1399 1400 s = splsoftnet(); /*called from softclock()*/ 1401 1402 { 1403 struct ipsecrequest *isr = sp->req, *nextisr; 1404 1405 while (isr != NULL) { 1406 if (isr->sav != NULL) { 1407 KEY_FREESAV(&isr->sav); 1408 isr->sav = NULL; 1409 } 1410 1411 nextisr = isr->next; 1412 kmem_intr_free(isr, sizeof(*isr)); 1413 isr = nextisr; 1414 } 1415 } 1416 1417 kmem_intr_free(sp, sizeof(*sp)); 1418 1419 splx(s); 1420 } 1421 1422 /* 1423 * search SPD 1424 * OUT: NULL : not found 1425 * others : found, pointer to a SP. 1426 */ 1427 static struct secpolicy * 1428 key_getsp(const struct secpolicyindex *spidx) 1429 { 1430 struct secpolicy *sp; 1431 1432 KASSERT(spidx != NULL); 1433 1434 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1435 if (sp->state == IPSEC_SPSTATE_DEAD) 1436 continue; 1437 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1438 SP_ADDREF(sp); 1439 return sp; 1440 } 1441 } 1442 1443 return NULL; 1444 } 1445 1446 /* 1447 * get SP by index. 1448 * OUT: NULL : not found 1449 * others : found, pointer to a SP. 1450 */ 1451 static struct secpolicy * 1452 key_getspbyid(u_int32_t id) 1453 { 1454 struct secpolicy *sp; 1455 1456 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1457 if (sp->state == IPSEC_SPSTATE_DEAD) 1458 continue; 1459 if (sp->id == id) { 1460 SP_ADDREF(sp); 1461 return sp; 1462 } 1463 } 1464 1465 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1466 if (sp->state == IPSEC_SPSTATE_DEAD) 1467 continue; 1468 if (sp->id == id) { 1469 SP_ADDREF(sp); 1470 return sp; 1471 } 1472 } 1473 1474 return NULL; 1475 } 1476 1477 struct secpolicy * 1478 key_newsp(const char* where, int tag) 1479 { 1480 struct secpolicy *newsp = NULL; 1481 1482 newsp = kmem_intr_zalloc(sizeof(struct secpolicy), KM_NOSLEEP); 1483 if (newsp != NULL) 1484 newsp->refcnt = 1; 1485 1486 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1487 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1488 return newsp; 1489 } 1490 1491 /* 1492 * create secpolicy structure from sadb_x_policy structure. 1493 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1494 * so must be set properly later. 1495 */ 1496 struct secpolicy * 1497 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1498 { 1499 struct secpolicy *newsp; 1500 1501 KASSERT(!cpu_softintr_p()); 1502 KASSERT(xpl0 != NULL); 1503 KASSERT(len >= sizeof(*xpl0)); 1504 1505 if (len != PFKEY_EXTLEN(xpl0)) { 1506 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1507 *error = EINVAL; 1508 return NULL; 1509 } 1510 1511 newsp = KEY_NEWSP(); 1512 if (newsp == NULL) { 1513 *error = ENOBUFS; 1514 return NULL; 1515 } 1516 1517 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1518 newsp->policy = xpl0->sadb_x_policy_type; 1519 1520 /* check policy */ 1521 switch (xpl0->sadb_x_policy_type) { 1522 case IPSEC_POLICY_DISCARD: 1523 case IPSEC_POLICY_NONE: 1524 case IPSEC_POLICY_ENTRUST: 1525 case IPSEC_POLICY_BYPASS: 1526 newsp->req = NULL; 1527 *error = 0; 1528 return newsp; 1529 1530 case IPSEC_POLICY_IPSEC: 1531 /* Continued */ 1532 break; 1533 default: 1534 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1535 KEY_FREESP(&newsp); 1536 *error = EINVAL; 1537 return NULL; 1538 } 1539 1540 /* IPSEC_POLICY_IPSEC */ 1541 { 1542 int tlen; 1543 const struct sadb_x_ipsecrequest *xisr; 1544 uint16_t xisr_reqid; 1545 struct ipsecrequest **p_isr = &newsp->req; 1546 1547 /* validity check */ 1548 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1549 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1550 *error = EINVAL; 1551 goto free_exit; 1552 } 1553 1554 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1555 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1556 1557 while (tlen > 0) { 1558 /* length check */ 1559 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1560 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1561 *error = EINVAL; 1562 goto free_exit; 1563 } 1564 1565 /* allocate request buffer */ 1566 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1567 1568 /* set values */ 1569 (*p_isr)->next = NULL; 1570 1571 switch (xisr->sadb_x_ipsecrequest_proto) { 1572 case IPPROTO_ESP: 1573 case IPPROTO_AH: 1574 case IPPROTO_IPCOMP: 1575 break; 1576 default: 1577 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1578 xisr->sadb_x_ipsecrequest_proto); 1579 *error = EPROTONOSUPPORT; 1580 goto free_exit; 1581 } 1582 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1583 1584 switch (xisr->sadb_x_ipsecrequest_mode) { 1585 case IPSEC_MODE_TRANSPORT: 1586 case IPSEC_MODE_TUNNEL: 1587 break; 1588 case IPSEC_MODE_ANY: 1589 default: 1590 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1591 xisr->sadb_x_ipsecrequest_mode); 1592 *error = EINVAL; 1593 goto free_exit; 1594 } 1595 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1596 1597 switch (xisr->sadb_x_ipsecrequest_level) { 1598 case IPSEC_LEVEL_DEFAULT: 1599 case IPSEC_LEVEL_USE: 1600 case IPSEC_LEVEL_REQUIRE: 1601 break; 1602 case IPSEC_LEVEL_UNIQUE: 1603 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1604 /* validity check */ 1605 /* 1606 * If range violation of reqid, kernel will 1607 * update it, don't refuse it. 1608 */ 1609 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1610 IPSECLOG(LOG_DEBUG, 1611 "reqid=%d range " 1612 "violation, updated by kernel.\n", 1613 xisr_reqid); 1614 xisr_reqid = 0; 1615 } 1616 1617 /* allocate new reqid id if reqid is zero. */ 1618 if (xisr_reqid == 0) { 1619 u_int16_t reqid = key_newreqid(); 1620 if (reqid == 0) { 1621 *error = ENOBUFS; 1622 goto free_exit; 1623 } 1624 (*p_isr)->saidx.reqid = reqid; 1625 } else { 1626 /* set it for manual keying. */ 1627 (*p_isr)->saidx.reqid = xisr_reqid; 1628 } 1629 break; 1630 1631 default: 1632 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1633 xisr->sadb_x_ipsecrequest_level); 1634 *error = EINVAL; 1635 goto free_exit; 1636 } 1637 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1638 1639 /* set IP addresses if there */ 1640 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1641 const struct sockaddr *paddr; 1642 1643 paddr = (const struct sockaddr *)(xisr + 1); 1644 1645 /* validity check */ 1646 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1647 IPSECLOG(LOG_DEBUG, "invalid request " 1648 "address length.\n"); 1649 *error = EINVAL; 1650 goto free_exit; 1651 } 1652 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1653 1654 paddr = (const struct sockaddr *)((const char *)paddr 1655 + paddr->sa_len); 1656 1657 /* validity check */ 1658 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1659 IPSECLOG(LOG_DEBUG, "invalid request " 1660 "address length.\n"); 1661 *error = EINVAL; 1662 goto free_exit; 1663 } 1664 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1665 } 1666 1667 (*p_isr)->sav = NULL; 1668 (*p_isr)->sp = newsp; 1669 1670 /* initialization for the next. */ 1671 p_isr = &(*p_isr)->next; 1672 tlen -= xisr->sadb_x_ipsecrequest_len; 1673 1674 /* validity check */ 1675 if (tlen < 0) { 1676 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 1677 *error = EINVAL; 1678 goto free_exit; 1679 } 1680 1681 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 1682 xisr->sadb_x_ipsecrequest_len); 1683 } 1684 } 1685 1686 *error = 0; 1687 return newsp; 1688 1689 free_exit: 1690 KEY_FREESP(&newsp); 1691 return NULL; 1692 } 1693 1694 static u_int16_t 1695 key_newreqid(void) 1696 { 1697 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1698 1699 auto_reqid = (auto_reqid == 0xffff ? 1700 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1701 1702 /* XXX should be unique check */ 1703 1704 return auto_reqid; 1705 } 1706 1707 /* 1708 * copy secpolicy struct to sadb_x_policy structure indicated. 1709 */ 1710 struct mbuf * 1711 key_sp2msg(const struct secpolicy *sp) 1712 { 1713 struct sadb_x_policy *xpl; 1714 int tlen; 1715 char *p; 1716 struct mbuf *m; 1717 1718 KASSERT(sp != NULL); 1719 1720 tlen = key_getspreqmsglen(sp); 1721 1722 m = key_alloc_mbuf(tlen); 1723 if (!m || m->m_next) { /*XXX*/ 1724 if (m) 1725 m_freem(m); 1726 return NULL; 1727 } 1728 1729 m->m_len = tlen; 1730 m->m_next = NULL; 1731 xpl = mtod(m, struct sadb_x_policy *); 1732 memset(xpl, 0, tlen); 1733 1734 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1735 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1736 xpl->sadb_x_policy_type = sp->policy; 1737 xpl->sadb_x_policy_dir = sp->spidx.dir; 1738 xpl->sadb_x_policy_id = sp->id; 1739 p = (char *)xpl + sizeof(*xpl); 1740 1741 /* if is the policy for ipsec ? */ 1742 if (sp->policy == IPSEC_POLICY_IPSEC) { 1743 struct sadb_x_ipsecrequest *xisr; 1744 struct ipsecrequest *isr; 1745 1746 for (isr = sp->req; isr != NULL; isr = isr->next) { 1747 1748 xisr = (struct sadb_x_ipsecrequest *)p; 1749 1750 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1751 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1752 xisr->sadb_x_ipsecrequest_level = isr->level; 1753 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1754 1755 p += sizeof(*xisr); 1756 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1757 p += isr->saidx.src.sa.sa_len; 1758 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1759 p += isr->saidx.src.sa.sa_len; 1760 1761 xisr->sadb_x_ipsecrequest_len = 1762 PFKEY_ALIGN8(sizeof(*xisr) 1763 + isr->saidx.src.sa.sa_len 1764 + isr->saidx.dst.sa.sa_len); 1765 } 1766 } 1767 1768 return m; 1769 } 1770 1771 /* m will not be freed nor modified */ 1772 static struct mbuf * 1773 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1774 int ndeep, int nitem, ...) 1775 { 1776 va_list ap; 1777 int idx; 1778 int i; 1779 struct mbuf *result = NULL, *n; 1780 int len; 1781 1782 KASSERT(m != NULL); 1783 KASSERT(mhp != NULL); 1784 1785 va_start(ap, nitem); 1786 for (i = 0; i < nitem; i++) { 1787 idx = va_arg(ap, int); 1788 if (idx < 0 || idx > SADB_EXT_MAX) 1789 goto fail; 1790 /* don't attempt to pull empty extension */ 1791 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1792 continue; 1793 if (idx != SADB_EXT_RESERVED && 1794 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1795 continue; 1796 1797 if (idx == SADB_EXT_RESERVED) { 1798 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1799 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1800 MGETHDR(n, M_DONTWAIT, MT_DATA); 1801 if (!n) 1802 goto fail; 1803 n->m_len = len; 1804 n->m_next = NULL; 1805 m_copydata(m, 0, sizeof(struct sadb_msg), 1806 mtod(n, void *)); 1807 } else if (i < ndeep) { 1808 len = mhp->extlen[idx]; 1809 n = key_alloc_mbuf(len); 1810 if (!n || n->m_next) { /*XXX*/ 1811 if (n) 1812 m_freem(n); 1813 goto fail; 1814 } 1815 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1816 mtod(n, void *)); 1817 } else { 1818 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1819 M_DONTWAIT); 1820 } 1821 if (n == NULL) 1822 goto fail; 1823 1824 if (result) 1825 m_cat(result, n); 1826 else 1827 result = n; 1828 } 1829 va_end(ap); 1830 1831 if (result && (result->m_flags & M_PKTHDR) != 0) { 1832 result->m_pkthdr.len = 0; 1833 for (n = result; n; n = n->m_next) 1834 result->m_pkthdr.len += n->m_len; 1835 } 1836 1837 return result; 1838 1839 fail: 1840 va_end(ap); 1841 m_freem(result); 1842 return NULL; 1843 } 1844 1845 /* 1846 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1847 * add an entry to SP database, when received 1848 * <base, address(SD), (lifetime(H),) policy> 1849 * from the user(?). 1850 * Adding to SP database, 1851 * and send 1852 * <base, address(SD), (lifetime(H),) policy> 1853 * to the socket which was send. 1854 * 1855 * SPDADD set a unique policy entry. 1856 * SPDSETIDX like SPDADD without a part of policy requests. 1857 * SPDUPDATE replace a unique policy entry. 1858 * 1859 * m will always be freed. 1860 */ 1861 static int 1862 key_api_spdadd(struct socket *so, struct mbuf *m, 1863 const struct sadb_msghdr *mhp) 1864 { 1865 const struct sockaddr *src, *dst; 1866 const struct sadb_x_policy *xpl0; 1867 struct sadb_x_policy *xpl; 1868 const struct sadb_lifetime *lft = NULL; 1869 struct secpolicyindex spidx; 1870 struct secpolicy *newsp; 1871 int error; 1872 1873 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1874 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1875 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1876 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1877 return key_senderror(so, m, EINVAL); 1878 } 1879 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1880 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1881 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1882 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1883 return key_senderror(so, m, EINVAL); 1884 } 1885 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1886 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 1887 sizeof(struct sadb_lifetime)) { 1888 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1889 return key_senderror(so, m, EINVAL); 1890 } 1891 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1892 } 1893 1894 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1895 1896 /* checking the direciton. */ 1897 switch (xpl0->sadb_x_policy_dir) { 1898 case IPSEC_DIR_INBOUND: 1899 case IPSEC_DIR_OUTBOUND: 1900 break; 1901 default: 1902 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 1903 return key_senderror(so, m, EINVAL); 1904 } 1905 1906 /* check policy */ 1907 /* key_api_spdadd() accepts DISCARD, NONE and IPSEC. */ 1908 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 1909 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1910 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 1911 return key_senderror(so, m, EINVAL); 1912 } 1913 1914 /* policy requests are mandatory when action is ipsec. */ 1915 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 1916 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 1917 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1918 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 1919 return key_senderror(so, m, EINVAL); 1920 } 1921 1922 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 1923 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 1924 1925 /* sanity check on addr pair */ 1926 if (src->sa_family != dst->sa_family) 1927 return key_senderror(so, m, EINVAL); 1928 if (src->sa_len != dst->sa_len) 1929 return key_senderror(so, m, EINVAL); 1930 1931 key_init_spidx_bymsghdr(&spidx, mhp); 1932 1933 /* 1934 * checking there is SP already or not. 1935 * SPDUPDATE doesn't depend on whether there is a SP or not. 1936 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1937 * then error. 1938 */ 1939 { 1940 struct secpolicy *sp; 1941 1942 sp = key_getsp(&spidx); 1943 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1944 if (sp) { 1945 key_sp_dead(sp); 1946 key_sp_unlink(sp); /* XXX jrs ordering */ 1947 KEY_FREESP(&sp); 1948 } 1949 } else { 1950 if (sp != NULL) { 1951 KEY_FREESP(&sp); 1952 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 1953 return key_senderror(so, m, EEXIST); 1954 } 1955 } 1956 } 1957 1958 /* allocation new SP entry */ 1959 newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error); 1960 if (newsp == NULL) { 1961 return key_senderror(so, m, error); 1962 } 1963 1964 newsp->id = key_getnewspid(); 1965 if (newsp->id == 0) { 1966 kmem_free(newsp, sizeof(*newsp)); 1967 return key_senderror(so, m, ENOBUFS); 1968 } 1969 1970 newsp->spidx = spidx; 1971 newsp->created = time_uptime; 1972 newsp->lastused = newsp->created; 1973 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1974 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1975 1976 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1977 newsp->state = IPSEC_SPSTATE_ALIVE; 1978 if (newsp->policy == IPSEC_POLICY_IPSEC) 1979 KASSERT(newsp->req != NULL); 1980 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1981 1982 #ifdef notyet 1983 /* delete the entry in spacqtree */ 1984 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1985 struct secspacq *spacq = key_getspacq(&spidx); 1986 if (spacq != NULL) { 1987 /* reset counter in order to deletion by timehandler. */ 1988 spacq->created = time_uptime; 1989 spacq->count = 0; 1990 } 1991 } 1992 #endif 1993 1994 /* Invalidate all cached SPD pointers in the PCBs. */ 1995 ipsec_invalpcbcacheall(); 1996 1997 #if defined(GATEWAY) 1998 /* Invalidate the ipflow cache, as well. */ 1999 ipflow_invalidate_all(0); 2000 #ifdef INET6 2001 if (in6_present) 2002 ip6flow_invalidate_all(0); 2003 #endif /* INET6 */ 2004 #endif /* GATEWAY */ 2005 2006 { 2007 struct mbuf *n, *mpolicy; 2008 int off; 2009 2010 /* create new sadb_msg to reply. */ 2011 if (lft) { 2012 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2013 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2014 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2015 } else { 2016 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2017 SADB_X_EXT_POLICY, 2018 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2019 } 2020 if (!n) 2021 return key_senderror(so, m, ENOBUFS); 2022 2023 n = key_fill_replymsg(n, 0); 2024 if (n == NULL) 2025 return key_senderror(so, m, ENOBUFS); 2026 2027 off = 0; 2028 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2029 sizeof(*xpl), &off); 2030 if (mpolicy == NULL) { 2031 /* n is already freed */ 2032 return key_senderror(so, m, ENOBUFS); 2033 } 2034 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2035 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2036 m_freem(n); 2037 return key_senderror(so, m, EINVAL); 2038 } 2039 xpl->sadb_x_policy_id = newsp->id; 2040 2041 m_freem(m); 2042 key_update_used(); 2043 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2044 } 2045 } 2046 2047 /* 2048 * get new policy id. 2049 * OUT: 2050 * 0: failure. 2051 * others: success. 2052 */ 2053 static u_int32_t 2054 key_getnewspid(void) 2055 { 2056 u_int32_t newid = 0; 2057 int count = key_spi_trycnt; /* XXX */ 2058 struct secpolicy *sp; 2059 2060 /* when requesting to allocate spi ranged */ 2061 while (count--) { 2062 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2063 2064 sp = key_getspbyid(newid); 2065 if (sp == NULL) 2066 break; 2067 2068 KEY_FREESP(&sp); 2069 } 2070 2071 if (count == 0 || newid == 0) { 2072 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2073 return 0; 2074 } 2075 2076 return newid; 2077 } 2078 2079 /* 2080 * SADB_SPDDELETE processing 2081 * receive 2082 * <base, address(SD), policy(*)> 2083 * from the user(?), and set SADB_SASTATE_DEAD, 2084 * and send, 2085 * <base, address(SD), policy(*)> 2086 * to the ikmpd. 2087 * policy(*) including direction of policy. 2088 * 2089 * m will always be freed. 2090 */ 2091 static int 2092 key_api_spddelete(struct socket *so, struct mbuf *m, 2093 const struct sadb_msghdr *mhp) 2094 { 2095 struct sadb_x_policy *xpl0; 2096 struct secpolicyindex spidx; 2097 struct secpolicy *sp; 2098 2099 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2100 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2101 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2102 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2103 return key_senderror(so, m, EINVAL); 2104 } 2105 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2106 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2107 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2108 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2109 return key_senderror(so, m, EINVAL); 2110 } 2111 2112 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2113 2114 /* checking the direciton. */ 2115 switch (xpl0->sadb_x_policy_dir) { 2116 case IPSEC_DIR_INBOUND: 2117 case IPSEC_DIR_OUTBOUND: 2118 break; 2119 default: 2120 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2121 return key_senderror(so, m, EINVAL); 2122 } 2123 2124 /* make secindex */ 2125 key_init_spidx_bymsghdr(&spidx, mhp); 2126 2127 /* Is there SP in SPD ? */ 2128 sp = key_getsp(&spidx); 2129 if (sp == NULL) { 2130 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2131 return key_senderror(so, m, EINVAL); 2132 } 2133 2134 /* save policy id to buffer to be returned. */ 2135 xpl0->sadb_x_policy_id = sp->id; 2136 2137 key_sp_dead(sp); 2138 key_sp_unlink(sp); /* XXX jrs ordering */ 2139 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2140 2141 /* Invalidate all cached SPD pointers in the PCBs. */ 2142 ipsec_invalpcbcacheall(); 2143 2144 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2145 2146 { 2147 struct mbuf *n; 2148 2149 /* create new sadb_msg to reply. */ 2150 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2151 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2152 if (!n) 2153 return key_senderror(so, m, ENOBUFS); 2154 2155 n = key_fill_replymsg(n, 0); 2156 if (n == NULL) 2157 return key_senderror(so, m, ENOBUFS); 2158 2159 m_freem(m); 2160 key_update_used(); 2161 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2162 } 2163 } 2164 2165 /* 2166 * SADB_SPDDELETE2 processing 2167 * receive 2168 * <base, policy(*)> 2169 * from the user(?), and set SADB_SASTATE_DEAD, 2170 * and send, 2171 * <base, policy(*)> 2172 * to the ikmpd. 2173 * policy(*) including direction of policy. 2174 * 2175 * m will always be freed. 2176 */ 2177 static int 2178 key_api_spddelete2(struct socket *so, struct mbuf *m, 2179 const struct sadb_msghdr *mhp) 2180 { 2181 u_int32_t id; 2182 struct secpolicy *sp; 2183 2184 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2185 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2186 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2187 return key_senderror(so, m, EINVAL); 2188 } 2189 2190 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2191 2192 /* Is there SP in SPD ? */ 2193 sp = key_getspbyid(id); 2194 if (sp == NULL) { 2195 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2196 return key_senderror(so, m, EINVAL); 2197 } 2198 2199 key_sp_dead(sp); 2200 key_sp_unlink(sp); /* XXX jrs ordering */ 2201 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2202 sp = NULL; 2203 2204 /* Invalidate all cached SPD pointers in the PCBs. */ 2205 ipsec_invalpcbcacheall(); 2206 2207 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2208 2209 { 2210 struct mbuf *n, *nn; 2211 int off, len; 2212 2213 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 2214 2215 /* create new sadb_msg to reply. */ 2216 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2217 2218 MGETHDR(n, M_DONTWAIT, MT_DATA); 2219 if (n && len > MHLEN) { 2220 MCLGET(n, M_DONTWAIT); 2221 if ((n->m_flags & M_EXT) == 0) { 2222 m_freem(n); 2223 n = NULL; 2224 } 2225 } 2226 if (!n) 2227 return key_senderror(so, m, ENOBUFS); 2228 2229 n->m_len = len; 2230 n->m_next = NULL; 2231 off = 0; 2232 2233 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2234 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2235 2236 KASSERTMSG(off == len, "length inconsistency"); 2237 2238 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2239 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2240 if (!n->m_next) { 2241 m_freem(n); 2242 return key_senderror(so, m, ENOBUFS); 2243 } 2244 2245 n->m_pkthdr.len = 0; 2246 for (nn = n; nn; nn = nn->m_next) 2247 n->m_pkthdr.len += nn->m_len; 2248 2249 n = key_fill_replymsg(n, 0); 2250 if (n == NULL) 2251 return key_senderror(so, m, ENOBUFS); 2252 2253 m_freem(m); 2254 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2255 } 2256 } 2257 2258 /* 2259 * SADB_X_GET processing 2260 * receive 2261 * <base, policy(*)> 2262 * from the user(?), 2263 * and send, 2264 * <base, address(SD), policy> 2265 * to the ikmpd. 2266 * policy(*) including direction of policy. 2267 * 2268 * m will always be freed. 2269 */ 2270 static int 2271 key_api_spdget(struct socket *so, struct mbuf *m, 2272 const struct sadb_msghdr *mhp) 2273 { 2274 u_int32_t id; 2275 struct secpolicy *sp; 2276 struct mbuf *n; 2277 2278 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2279 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2280 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2281 return key_senderror(so, m, EINVAL); 2282 } 2283 2284 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2285 2286 /* Is there SP in SPD ? */ 2287 sp = key_getspbyid(id); 2288 if (sp == NULL) { 2289 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2290 return key_senderror(so, m, ENOENT); 2291 } 2292 2293 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2294 mhp->msg->sadb_msg_pid); 2295 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2296 if (n != NULL) { 2297 m_freem(m); 2298 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2299 } else 2300 return key_senderror(so, m, ENOBUFS); 2301 } 2302 2303 #ifdef notyet 2304 /* 2305 * SADB_X_SPDACQUIRE processing. 2306 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2307 * send 2308 * <base, policy(*)> 2309 * to KMD, and expect to receive 2310 * <base> with SADB_X_SPDACQUIRE if error occurred, 2311 * or 2312 * <base, policy> 2313 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2314 * policy(*) is without policy requests. 2315 * 2316 * 0 : succeed 2317 * others: error number 2318 */ 2319 int 2320 key_spdacquire(const struct secpolicy *sp) 2321 { 2322 struct mbuf *result = NULL, *m; 2323 struct secspacq *newspacq; 2324 int error; 2325 2326 KASSERT(sp != NULL); 2327 KASSERTMSG(sp->req == NULL, "called but there is request"); 2328 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2329 "policy mismathed. IPsec is expected"); 2330 2331 /* Get an entry to check whether sent message or not. */ 2332 newspacq = key_getspacq(&sp->spidx); 2333 if (newspacq != NULL) { 2334 if (key_blockacq_count < newspacq->count) { 2335 /* reset counter and do send message. */ 2336 newspacq->count = 0; 2337 } else { 2338 /* increment counter and do nothing. */ 2339 newspacq->count++; 2340 return 0; 2341 } 2342 } else { 2343 /* make new entry for blocking to send SADB_ACQUIRE. */ 2344 newspacq = key_newspacq(&sp->spidx); 2345 if (newspacq == NULL) 2346 return ENOBUFS; 2347 2348 /* add to acqtree */ 2349 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2350 } 2351 2352 /* create new sadb_msg to reply. */ 2353 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2354 if (!m) { 2355 error = ENOBUFS; 2356 goto fail; 2357 } 2358 result = m; 2359 2360 result->m_pkthdr.len = 0; 2361 for (m = result; m; m = m->m_next) 2362 result->m_pkthdr.len += m->m_len; 2363 2364 mtod(result, struct sadb_msg *)->sadb_msg_len = 2365 PFKEY_UNIT64(result->m_pkthdr.len); 2366 2367 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2368 2369 fail: 2370 if (result) 2371 m_freem(result); 2372 return error; 2373 } 2374 #endif /* notyet */ 2375 2376 /* 2377 * SADB_SPDFLUSH processing 2378 * receive 2379 * <base> 2380 * from the user, and free all entries in secpctree. 2381 * and send, 2382 * <base> 2383 * to the user. 2384 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2385 * 2386 * m will always be freed. 2387 */ 2388 static int 2389 key_api_spdflush(struct socket *so, struct mbuf *m, 2390 const struct sadb_msghdr *mhp) 2391 { 2392 struct sadb_msg *newmsg; 2393 struct secpolicy *sp; 2394 u_int dir; 2395 2396 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2397 return key_senderror(so, m, EINVAL); 2398 2399 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2400 struct secpolicy * nextsp; 2401 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 2402 if (sp->state == IPSEC_SPSTATE_DEAD) 2403 continue; 2404 key_sp_dead(sp); 2405 key_sp_unlink(sp); 2406 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2407 continue; 2408 } 2409 } 2410 2411 /* Invalidate all cached SPD pointers in the PCBs. */ 2412 ipsec_invalpcbcacheall(); 2413 2414 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2415 2416 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2417 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2418 return key_senderror(so, m, ENOBUFS); 2419 } 2420 2421 if (m->m_next) 2422 m_freem(m->m_next); 2423 m->m_next = NULL; 2424 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2425 newmsg = mtod(m, struct sadb_msg *); 2426 newmsg->sadb_msg_errno = 0; 2427 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2428 2429 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2430 } 2431 2432 static struct sockaddr key_src = { 2433 .sa_len = 2, 2434 .sa_family = PF_KEY, 2435 }; 2436 2437 static struct mbuf * 2438 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2439 { 2440 struct secpolicy *sp; 2441 int cnt; 2442 u_int dir; 2443 struct mbuf *m, *n, *prev; 2444 int totlen; 2445 2446 *lenp = 0; 2447 2448 /* search SPD entry and get buffer size. */ 2449 cnt = 0; 2450 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2451 LIST_FOREACH(sp, &sptree[dir], chain) { 2452 cnt++; 2453 } 2454 } 2455 2456 if (cnt == 0) { 2457 *errorp = ENOENT; 2458 return (NULL); 2459 } 2460 2461 m = NULL; 2462 prev = m; 2463 totlen = 0; 2464 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2465 LIST_FOREACH(sp, &sptree[dir], chain) { 2466 --cnt; 2467 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2468 2469 if (!n) { 2470 *errorp = ENOBUFS; 2471 if (m) 2472 m_freem(m); 2473 return (NULL); 2474 } 2475 2476 totlen += n->m_pkthdr.len; 2477 if (!m) { 2478 m = n; 2479 } else { 2480 prev->m_nextpkt = n; 2481 } 2482 prev = n; 2483 } 2484 } 2485 2486 *lenp = totlen; 2487 *errorp = 0; 2488 return (m); 2489 } 2490 2491 /* 2492 * SADB_SPDDUMP processing 2493 * receive 2494 * <base> 2495 * from the user, and dump all SP leaves 2496 * and send, 2497 * <base> ..... 2498 * to the ikmpd. 2499 * 2500 * m will always be freed. 2501 */ 2502 static int 2503 key_api_spddump(struct socket *so, struct mbuf *m0, 2504 const struct sadb_msghdr *mhp) 2505 { 2506 struct mbuf *n; 2507 int error, len; 2508 int ok, s; 2509 pid_t pid; 2510 2511 pid = mhp->msg->sadb_msg_pid; 2512 /* 2513 * If the requestor has insufficient socket-buffer space 2514 * for the entire chain, nobody gets any response to the DUMP. 2515 * XXX For now, only the requestor ever gets anything. 2516 * Moreover, if the requestor has any space at all, they receive 2517 * the entire chain, otherwise the request is refused with ENOBUFS. 2518 */ 2519 if (sbspace(&so->so_rcv) <= 0) { 2520 return key_senderror(so, m0, ENOBUFS); 2521 } 2522 2523 s = splsoftnet(); 2524 n = key_setspddump_chain(&error, &len, pid); 2525 splx(s); 2526 2527 if (n == NULL) { 2528 return key_senderror(so, m0, ENOENT); 2529 } 2530 { 2531 uint64_t *ps = PFKEY_STAT_GETREF(); 2532 ps[PFKEY_STAT_IN_TOTAL]++; 2533 ps[PFKEY_STAT_IN_BYTES] += len; 2534 PFKEY_STAT_PUTREF(); 2535 } 2536 2537 /* 2538 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2539 * The requestor receives either the entire chain, or an 2540 * error message with ENOBUFS. 2541 */ 2542 2543 /* 2544 * sbappendchainwith record takes the chain of entries, one 2545 * packet-record per SPD entry, prepends the key_src sockaddr 2546 * to each packet-record, links the sockaddr mbufs into a new 2547 * list of records, then appends the entire resulting 2548 * list to the requesting socket. 2549 */ 2550 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2551 SB_PRIO_ONESHOT_OVERFLOW); 2552 2553 if (!ok) { 2554 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2555 m_freem(n); 2556 return key_senderror(so, m0, ENOBUFS); 2557 } 2558 2559 m_freem(m0); 2560 return error; 2561 } 2562 2563 /* 2564 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2565 */ 2566 static int 2567 key_api_nat_map(struct socket *so, struct mbuf *m, 2568 const struct sadb_msghdr *mhp) 2569 { 2570 struct sadb_x_nat_t_type *type; 2571 struct sadb_x_nat_t_port *sport; 2572 struct sadb_x_nat_t_port *dport; 2573 struct sadb_address *iaddr, *raddr; 2574 struct sadb_x_nat_t_frag *frag; 2575 2576 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2577 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2578 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2579 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2580 return key_senderror(so, m, EINVAL); 2581 } 2582 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2583 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2584 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2585 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2586 return key_senderror(so, m, EINVAL); 2587 } 2588 2589 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2590 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2591 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2592 return key_senderror(so, m, EINVAL); 2593 } 2594 2595 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2596 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2597 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2598 return key_senderror(so, m, EINVAL); 2599 } 2600 2601 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2602 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2603 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2604 return key_senderror(so, m, EINVAL); 2605 } 2606 2607 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2608 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2609 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2610 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2611 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2612 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2613 2614 /* 2615 * XXX handle that, it should also contain a SA, or anything 2616 * that enable to update the SA information. 2617 */ 2618 2619 return 0; 2620 } 2621 2622 static struct mbuf * 2623 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2624 { 2625 struct mbuf *result = NULL, *m; 2626 2627 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2628 if (!m) 2629 goto fail; 2630 result = m; 2631 2632 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2633 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto); 2634 if (!m) 2635 goto fail; 2636 m_cat(result, m); 2637 2638 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2639 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto); 2640 if (!m) 2641 goto fail; 2642 m_cat(result, m); 2643 2644 m = key_sp2msg(sp); 2645 if (!m) 2646 goto fail; 2647 m_cat(result, m); 2648 2649 if ((result->m_flags & M_PKTHDR) == 0) 2650 goto fail; 2651 2652 if (result->m_len < sizeof(struct sadb_msg)) { 2653 result = m_pullup(result, sizeof(struct sadb_msg)); 2654 if (result == NULL) 2655 goto fail; 2656 } 2657 2658 result->m_pkthdr.len = 0; 2659 for (m = result; m; m = m->m_next) 2660 result->m_pkthdr.len += m->m_len; 2661 2662 mtod(result, struct sadb_msg *)->sadb_msg_len = 2663 PFKEY_UNIT64(result->m_pkthdr.len); 2664 2665 return result; 2666 2667 fail: 2668 m_freem(result); 2669 return NULL; 2670 } 2671 2672 /* 2673 * get PFKEY message length for security policy and request. 2674 */ 2675 static u_int 2676 key_getspreqmsglen(const struct secpolicy *sp) 2677 { 2678 u_int tlen; 2679 2680 tlen = sizeof(struct sadb_x_policy); 2681 2682 /* if is the policy for ipsec ? */ 2683 if (sp->policy != IPSEC_POLICY_IPSEC) 2684 return tlen; 2685 2686 /* get length of ipsec requests */ 2687 { 2688 const struct ipsecrequest *isr; 2689 int len; 2690 2691 for (isr = sp->req; isr != NULL; isr = isr->next) { 2692 len = sizeof(struct sadb_x_ipsecrequest) 2693 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 2694 2695 tlen += PFKEY_ALIGN8(len); 2696 } 2697 } 2698 2699 return tlen; 2700 } 2701 2702 /* 2703 * SADB_SPDEXPIRE processing 2704 * send 2705 * <base, address(SD), lifetime(CH), policy> 2706 * to KMD by PF_KEY. 2707 * 2708 * OUT: 0 : succeed 2709 * others : error number 2710 */ 2711 static int 2712 key_spdexpire(struct secpolicy *sp) 2713 { 2714 int s; 2715 struct mbuf *result = NULL, *m; 2716 int len; 2717 int error = -1; 2718 struct sadb_lifetime *lt; 2719 2720 /* XXX: Why do we lock ? */ 2721 s = splsoftnet(); /*called from softclock()*/ 2722 2723 KASSERT(sp != NULL); 2724 2725 /* set msg header */ 2726 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2727 if (!m) { 2728 error = ENOBUFS; 2729 goto fail; 2730 } 2731 result = m; 2732 2733 /* create lifetime extension (current and hard) */ 2734 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2735 m = key_alloc_mbuf(len); 2736 if (!m || m->m_next) { /*XXX*/ 2737 if (m) 2738 m_freem(m); 2739 error = ENOBUFS; 2740 goto fail; 2741 } 2742 memset(mtod(m, void *), 0, len); 2743 lt = mtod(m, struct sadb_lifetime *); 2744 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2745 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2746 lt->sadb_lifetime_allocations = 0; 2747 lt->sadb_lifetime_bytes = 0; 2748 lt->sadb_lifetime_addtime = time_mono_to_wall(sp->created); 2749 lt->sadb_lifetime_usetime = time_mono_to_wall(sp->lastused); 2750 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2751 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2752 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2753 lt->sadb_lifetime_allocations = 0; 2754 lt->sadb_lifetime_bytes = 0; 2755 lt->sadb_lifetime_addtime = sp->lifetime; 2756 lt->sadb_lifetime_usetime = sp->validtime; 2757 m_cat(result, m); 2758 2759 /* set sadb_address for source */ 2760 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 2761 sp->spidx.prefs, sp->spidx.ul_proto); 2762 if (!m) { 2763 error = ENOBUFS; 2764 goto fail; 2765 } 2766 m_cat(result, m); 2767 2768 /* set sadb_address for destination */ 2769 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 2770 sp->spidx.prefd, sp->spidx.ul_proto); 2771 if (!m) { 2772 error = ENOBUFS; 2773 goto fail; 2774 } 2775 m_cat(result, m); 2776 2777 /* set secpolicy */ 2778 m = key_sp2msg(sp); 2779 if (!m) { 2780 error = ENOBUFS; 2781 goto fail; 2782 } 2783 m_cat(result, m); 2784 2785 if ((result->m_flags & M_PKTHDR) == 0) { 2786 error = EINVAL; 2787 goto fail; 2788 } 2789 2790 if (result->m_len < sizeof(struct sadb_msg)) { 2791 result = m_pullup(result, sizeof(struct sadb_msg)); 2792 if (result == NULL) { 2793 error = ENOBUFS; 2794 goto fail; 2795 } 2796 } 2797 2798 result->m_pkthdr.len = 0; 2799 for (m = result; m; m = m->m_next) 2800 result->m_pkthdr.len += m->m_len; 2801 2802 mtod(result, struct sadb_msg *)->sadb_msg_len = 2803 PFKEY_UNIT64(result->m_pkthdr.len); 2804 2805 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2806 2807 fail: 2808 if (result) 2809 m_freem(result); 2810 splx(s); 2811 return error; 2812 } 2813 2814 /* %%% SAD management */ 2815 /* 2816 * allocating a memory for new SA head, and copy from the values of mhp. 2817 * OUT: NULL : failure due to the lack of memory. 2818 * others : pointer to new SA head. 2819 */ 2820 static struct secashead * 2821 key_newsah(const struct secasindex *saidx) 2822 { 2823 struct secashead *newsah; 2824 int i; 2825 2826 KASSERT(saidx != NULL); 2827 2828 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 2829 for (i = 0; i < __arraycount(newsah->savtree); i++) 2830 LIST_INIT(&newsah->savtree[i]); 2831 newsah->saidx = *saidx; 2832 2833 /* add to saidxtree */ 2834 newsah->state = SADB_SASTATE_MATURE; 2835 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2836 2837 return newsah; 2838 } 2839 2840 /* 2841 * delete SA index and all SA registerd. 2842 */ 2843 static void 2844 key_delsah(struct secashead *sah) 2845 { 2846 struct secasvar *sav; 2847 u_int state; 2848 int s; 2849 int zombie = 0; 2850 2851 KASSERT(!cpu_softintr_p()); 2852 KASSERT(sah != NULL); 2853 2854 s = splsoftnet(); 2855 2856 /* searching all SA registerd in the secindex. */ 2857 SASTATE_ANY_FOREACH(state) { 2858 LIST_FOREACH(sav, &sah->savtree[state], chain) { 2859 /* give up to delete this sa */ 2860 zombie++; 2861 } 2862 } 2863 2864 /* don't delete sah only if there are savs. */ 2865 if (zombie) { 2866 splx(s); 2867 return; 2868 } 2869 2870 rtcache_free(&sah->sa_route); 2871 2872 /* remove from tree of SA index */ 2873 KASSERT(__LIST_CHAINED(sah)); 2874 LIST_REMOVE(sah, chain); 2875 2876 if (sah->idents != NULL) 2877 kmem_free(sah->idents, sah->idents_len); 2878 if (sah->identd != NULL) 2879 kmem_free(sah->identd, sah->identd_len); 2880 2881 kmem_free(sah, sizeof(*sah)); 2882 2883 splx(s); 2884 return; 2885 } 2886 2887 /* 2888 * allocating a new SA with LARVAL state. 2889 * key_api_add() and key_api_getspi() call, 2890 * and copy the values of mhp into new buffer. 2891 * When SAD message type is GETSPI: 2892 * to set sequence number from acq_seq++, 2893 * to set zero to SPI. 2894 * not to call key_setsava(). 2895 * OUT: NULL : fail 2896 * others : pointer to new secasvar. 2897 * 2898 * does not modify mbuf. does not free mbuf on error. 2899 */ 2900 static struct secasvar * 2901 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2902 int *errp, const char* where, int tag) 2903 { 2904 struct secasvar *newsav; 2905 const struct sadb_sa *xsa; 2906 2907 KASSERT(!cpu_softintr_p()); 2908 KASSERT(m != NULL); 2909 KASSERT(mhp != NULL); 2910 KASSERT(mhp->msg != NULL); 2911 2912 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 2913 2914 switch (mhp->msg->sadb_msg_type) { 2915 case SADB_GETSPI: 2916 newsav->spi = 0; 2917 2918 #ifdef IPSEC_DOSEQCHECK 2919 /* sync sequence number */ 2920 if (mhp->msg->sadb_msg_seq == 0) 2921 newsav->seq = 2922 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2923 else 2924 #endif 2925 newsav->seq = mhp->msg->sadb_msg_seq; 2926 break; 2927 2928 case SADB_ADD: 2929 /* sanity check */ 2930 if (mhp->ext[SADB_EXT_SA] == NULL) { 2931 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2932 *errp = EINVAL; 2933 goto error; 2934 } 2935 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2936 newsav->spi = xsa->sadb_sa_spi; 2937 newsav->seq = mhp->msg->sadb_msg_seq; 2938 break; 2939 default: 2940 *errp = EINVAL; 2941 goto error; 2942 } 2943 2944 /* copy sav values */ 2945 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2946 *errp = key_setsaval(newsav, m, mhp); 2947 if (*errp) 2948 goto error; 2949 } 2950 2951 /* reset created */ 2952 newsav->created = time_uptime; 2953 newsav->pid = mhp->msg->sadb_msg_pid; 2954 2955 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2956 "DP from %s:%u return SA:%p\n", where, tag, newsav); 2957 return newsav; 2958 2959 error: 2960 KASSERT(*errp != 0); 2961 kmem_free(newsav, sizeof(*newsav)); 2962 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2963 "DP from %s:%u return SA:NULL\n", where, tag); 2964 return NULL; 2965 } 2966 2967 2968 static void 2969 key_clear_xform(struct secasvar *sav) 2970 { 2971 2972 /* 2973 * Cleanup xform state. Note that zeroize'ing causes the 2974 * keys to be cleared; otherwise we must do it ourself. 2975 */ 2976 if (sav->tdb_xform != NULL) { 2977 sav->tdb_xform->xf_zeroize(sav); 2978 sav->tdb_xform = NULL; 2979 } else { 2980 if (sav->key_auth != NULL) 2981 explicit_memset(_KEYBUF(sav->key_auth), 0, 2982 _KEYLEN(sav->key_auth)); 2983 if (sav->key_enc != NULL) 2984 explicit_memset(_KEYBUF(sav->key_enc), 0, 2985 _KEYLEN(sav->key_enc)); 2986 } 2987 } 2988 2989 /* 2990 * free() SA variable entry. 2991 */ 2992 static void 2993 key_delsav(struct secasvar *sav) 2994 { 2995 2996 KASSERT(sav != NULL); 2997 KASSERTMSG(sav->refcnt == 0, "reference count %u > 0", sav->refcnt); 2998 2999 key_clear_xform(sav); 3000 key_freesaval(sav); 3001 kmem_intr_free(sav, sizeof(*sav)); 3002 3003 return; 3004 } 3005 3006 /* 3007 * search SAD. 3008 * OUT: 3009 * NULL : not found 3010 * others : found, pointer to a SA. 3011 */ 3012 static struct secashead * 3013 key_getsah(const struct secasindex *saidx, int flag) 3014 { 3015 struct secashead *sah; 3016 3017 LIST_FOREACH(sah, &sahtree, chain) { 3018 if (sah->state == SADB_SASTATE_DEAD) 3019 continue; 3020 if (key_saidx_match(&sah->saidx, saidx, flag)) 3021 return sah; 3022 } 3023 3024 return NULL; 3025 } 3026 3027 /* 3028 * check not to be duplicated SPI. 3029 * NOTE: this function is too slow due to searching all SAD. 3030 * OUT: 3031 * NULL : not found 3032 * others : found, pointer to a SA. 3033 */ 3034 static bool 3035 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3036 { 3037 struct secashead *sah; 3038 struct secasvar *sav; 3039 3040 /* check address family */ 3041 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3042 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3043 return false; 3044 } 3045 3046 /* check all SAD */ 3047 LIST_FOREACH(sah, &sahtree, chain) { 3048 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3049 continue; 3050 sav = key_getsavbyspi(sah, spi); 3051 if (sav != NULL) { 3052 KEY_FREESAV(&sav); 3053 return true; 3054 } 3055 } 3056 3057 return false; 3058 } 3059 3060 /* 3061 * search SAD litmited alive SA, protocol, SPI. 3062 * OUT: 3063 * NULL : not found 3064 * others : found, pointer to a SA. 3065 */ 3066 static struct secasvar * 3067 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3068 { 3069 struct secasvar *sav; 3070 u_int state; 3071 3072 /* search all status */ 3073 SASTATE_ALIVE_FOREACH(state) { 3074 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3075 3076 /* sanity check */ 3077 if (sav->state != state) { 3078 IPSECLOG(LOG_DEBUG, 3079 "invalid sav->state (queue: %d SA: %d)\n", 3080 state, sav->state); 3081 continue; 3082 } 3083 3084 if (sav->spi == spi) { 3085 SA_ADDREF(sav); 3086 return sav; 3087 } 3088 } 3089 } 3090 3091 return NULL; 3092 } 3093 3094 /* 3095 * Free allocated data to member variables of sav: 3096 * sav->replay, sav->key_* and sav->lft_*. 3097 */ 3098 static void 3099 key_freesaval(struct secasvar *sav) 3100 { 3101 3102 if (sav->replay != NULL) { 3103 kmem_intr_free(sav->replay, sav->replay_len); 3104 sav->replay = NULL; 3105 sav->replay_len = 0; 3106 } 3107 if (sav->key_auth != NULL) { 3108 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3109 sav->key_auth = NULL; 3110 sav->key_auth_len = 0; 3111 } 3112 if (sav->key_enc != NULL) { 3113 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3114 sav->key_enc = NULL; 3115 sav->key_enc_len = 0; 3116 } 3117 if (sav->lft_c != NULL) { 3118 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3119 sav->lft_c = NULL; 3120 } 3121 if (sav->lft_h != NULL) { 3122 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3123 sav->lft_h = NULL; 3124 } 3125 if (sav->lft_s != NULL) { 3126 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3127 sav->lft_s = NULL; 3128 } 3129 } 3130 3131 /* 3132 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3133 * You must update these if need. 3134 * OUT: 0: success. 3135 * !0: failure. 3136 * 3137 * does not modify mbuf. does not free mbuf on error. 3138 */ 3139 static int 3140 key_setsaval(struct secasvar *sav, struct mbuf *m, 3141 const struct sadb_msghdr *mhp) 3142 { 3143 int error = 0; 3144 3145 KASSERT(!cpu_softintr_p()); 3146 KASSERT(m != NULL); 3147 KASSERT(mhp != NULL); 3148 KASSERT(mhp->msg != NULL); 3149 3150 /* We shouldn't initialize sav variables while someone uses it. */ 3151 KASSERT(sav->refcnt == 0); 3152 3153 /* SA */ 3154 if (mhp->ext[SADB_EXT_SA] != NULL) { 3155 const struct sadb_sa *sa0; 3156 3157 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3158 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3159 error = EINVAL; 3160 goto fail; 3161 } 3162 3163 sav->alg_auth = sa0->sadb_sa_auth; 3164 sav->alg_enc = sa0->sadb_sa_encrypt; 3165 sav->flags = sa0->sadb_sa_flags; 3166 3167 /* replay window */ 3168 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3169 size_t len = sizeof(struct secreplay) + 3170 sa0->sadb_sa_replay; 3171 sav->replay = kmem_zalloc(len, KM_SLEEP); 3172 sav->replay_len = len; 3173 if (sa0->sadb_sa_replay != 0) 3174 sav->replay->bitmap = (char*)(sav->replay+1); 3175 sav->replay->wsize = sa0->sadb_sa_replay; 3176 } 3177 } 3178 3179 /* Authentication keys */ 3180 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3181 const struct sadb_key *key0; 3182 int len; 3183 3184 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3185 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3186 3187 error = 0; 3188 if (len < sizeof(*key0)) { 3189 error = EINVAL; 3190 goto fail; 3191 } 3192 switch (mhp->msg->sadb_msg_satype) { 3193 case SADB_SATYPE_AH: 3194 case SADB_SATYPE_ESP: 3195 case SADB_X_SATYPE_TCPSIGNATURE: 3196 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3197 sav->alg_auth != SADB_X_AALG_NULL) 3198 error = EINVAL; 3199 break; 3200 case SADB_X_SATYPE_IPCOMP: 3201 default: 3202 error = EINVAL; 3203 break; 3204 } 3205 if (error) { 3206 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3207 goto fail; 3208 } 3209 3210 sav->key_auth = key_newbuf(key0, len); 3211 sav->key_auth_len = len; 3212 } 3213 3214 /* Encryption key */ 3215 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3216 const struct sadb_key *key0; 3217 int len; 3218 3219 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3220 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3221 3222 error = 0; 3223 if (len < sizeof(*key0)) { 3224 error = EINVAL; 3225 goto fail; 3226 } 3227 switch (mhp->msg->sadb_msg_satype) { 3228 case SADB_SATYPE_ESP: 3229 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3230 sav->alg_enc != SADB_EALG_NULL) { 3231 error = EINVAL; 3232 break; 3233 } 3234 sav->key_enc = key_newbuf(key0, len); 3235 sav->key_enc_len = len; 3236 break; 3237 case SADB_X_SATYPE_IPCOMP: 3238 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3239 error = EINVAL; 3240 sav->key_enc = NULL; /*just in case*/ 3241 break; 3242 case SADB_SATYPE_AH: 3243 case SADB_X_SATYPE_TCPSIGNATURE: 3244 default: 3245 error = EINVAL; 3246 break; 3247 } 3248 if (error) { 3249 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3250 goto fail; 3251 } 3252 } 3253 3254 /* set iv */ 3255 sav->ivlen = 0; 3256 3257 switch (mhp->msg->sadb_msg_satype) { 3258 case SADB_SATYPE_AH: 3259 error = xform_init(sav, XF_AH); 3260 break; 3261 case SADB_SATYPE_ESP: 3262 error = xform_init(sav, XF_ESP); 3263 break; 3264 case SADB_X_SATYPE_IPCOMP: 3265 error = xform_init(sav, XF_IPCOMP); 3266 break; 3267 case SADB_X_SATYPE_TCPSIGNATURE: 3268 error = xform_init(sav, XF_TCPSIGNATURE); 3269 break; 3270 } 3271 if (error) { 3272 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3273 mhp->msg->sadb_msg_satype); 3274 goto fail; 3275 } 3276 3277 /* reset created */ 3278 sav->created = time_uptime; 3279 3280 /* make lifetime for CURRENT */ 3281 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3282 3283 sav->lft_c->sadb_lifetime_len = 3284 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3285 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3286 sav->lft_c->sadb_lifetime_allocations = 0; 3287 sav->lft_c->sadb_lifetime_bytes = 0; 3288 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3289 sav->lft_c->sadb_lifetime_usetime = 0; 3290 3291 /* lifetimes for HARD and SOFT */ 3292 { 3293 const struct sadb_lifetime *lft0; 3294 3295 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3296 if (lft0 != NULL) { 3297 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3298 error = EINVAL; 3299 goto fail; 3300 } 3301 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3302 } 3303 3304 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3305 if (lft0 != NULL) { 3306 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3307 error = EINVAL; 3308 goto fail; 3309 } 3310 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3311 /* to be initialize ? */ 3312 } 3313 } 3314 3315 return 0; 3316 3317 fail: 3318 key_clear_xform(sav); 3319 key_freesaval(sav); 3320 3321 return error; 3322 } 3323 3324 /* 3325 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3326 * OUT: 0: valid 3327 * other: errno 3328 */ 3329 static int 3330 key_init_xform(struct secasvar *sav) 3331 { 3332 int error; 3333 3334 /* We shouldn't initialize sav variables while someone uses it. */ 3335 KASSERT(sav->refcnt == 0); 3336 3337 /* check SPI value */ 3338 switch (sav->sah->saidx.proto) { 3339 case IPPROTO_ESP: 3340 case IPPROTO_AH: 3341 if (ntohl(sav->spi) <= 255) { 3342 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3343 (u_int32_t)ntohl(sav->spi)); 3344 return EINVAL; 3345 } 3346 break; 3347 } 3348 3349 /* check satype */ 3350 switch (sav->sah->saidx.proto) { 3351 case IPPROTO_ESP: 3352 /* check flags */ 3353 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3354 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3355 IPSECLOG(LOG_DEBUG, 3356 "invalid flag (derived) given to old-esp.\n"); 3357 return EINVAL; 3358 } 3359 error = xform_init(sav, XF_ESP); 3360 break; 3361 case IPPROTO_AH: 3362 /* check flags */ 3363 if (sav->flags & SADB_X_EXT_DERIV) { 3364 IPSECLOG(LOG_DEBUG, 3365 "invalid flag (derived) given to AH SA.\n"); 3366 return EINVAL; 3367 } 3368 if (sav->alg_enc != SADB_EALG_NONE) { 3369 IPSECLOG(LOG_DEBUG, 3370 "protocol and algorithm mismated.\n"); 3371 return(EINVAL); 3372 } 3373 error = xform_init(sav, XF_AH); 3374 break; 3375 case IPPROTO_IPCOMP: 3376 if (sav->alg_auth != SADB_AALG_NONE) { 3377 IPSECLOG(LOG_DEBUG, 3378 "protocol and algorithm mismated.\n"); 3379 return(EINVAL); 3380 } 3381 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3382 && ntohl(sav->spi) >= 0x10000) { 3383 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3384 return(EINVAL); 3385 } 3386 error = xform_init(sav, XF_IPCOMP); 3387 break; 3388 case IPPROTO_TCP: 3389 if (sav->alg_enc != SADB_EALG_NONE) { 3390 IPSECLOG(LOG_DEBUG, 3391 "protocol and algorithm mismated.\n"); 3392 return(EINVAL); 3393 } 3394 error = xform_init(sav, XF_TCPSIGNATURE); 3395 break; 3396 default: 3397 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3398 error = EPROTONOSUPPORT; 3399 break; 3400 } 3401 3402 return error; 3403 } 3404 3405 /* 3406 * subroutine for SADB_GET and SADB_DUMP. 3407 */ 3408 static struct mbuf * 3409 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3410 u_int32_t seq, u_int32_t pid) 3411 { 3412 struct mbuf *result = NULL, *tres = NULL, *m; 3413 int l = 0; 3414 int i; 3415 void *p; 3416 struct sadb_lifetime lt; 3417 int dumporder[] = { 3418 SADB_EXT_SA, SADB_X_EXT_SA2, 3419 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3420 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3421 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3422 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3423 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3424 SADB_X_EXT_NAT_T_TYPE, 3425 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3426 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3427 SADB_X_EXT_NAT_T_FRAG, 3428 3429 }; 3430 3431 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3432 if (m == NULL) 3433 goto fail; 3434 result = m; 3435 3436 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3437 m = NULL; 3438 p = NULL; 3439 switch (dumporder[i]) { 3440 case SADB_EXT_SA: 3441 m = key_setsadbsa(sav); 3442 break; 3443 3444 case SADB_X_EXT_SA2: 3445 m = key_setsadbxsa2(sav->sah->saidx.mode, 3446 sav->replay ? sav->replay->count : 0, 3447 sav->sah->saidx.reqid); 3448 break; 3449 3450 case SADB_EXT_ADDRESS_SRC: 3451 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3452 &sav->sah->saidx.src.sa, 3453 FULLMASK, IPSEC_ULPROTO_ANY); 3454 break; 3455 3456 case SADB_EXT_ADDRESS_DST: 3457 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3458 &sav->sah->saidx.dst.sa, 3459 FULLMASK, IPSEC_ULPROTO_ANY); 3460 break; 3461 3462 case SADB_EXT_KEY_AUTH: 3463 if (!sav->key_auth) 3464 continue; 3465 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3466 p = sav->key_auth; 3467 break; 3468 3469 case SADB_EXT_KEY_ENCRYPT: 3470 if (!sav->key_enc) 3471 continue; 3472 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3473 p = sav->key_enc; 3474 break; 3475 3476 case SADB_EXT_LIFETIME_CURRENT: 3477 if (!sav->lft_c) 3478 continue; 3479 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3480 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3481 lt.sadb_lifetime_addtime = 3482 time_mono_to_wall(lt.sadb_lifetime_addtime); 3483 lt.sadb_lifetime_usetime = 3484 time_mono_to_wall(lt.sadb_lifetime_usetime); 3485 p = < 3486 break; 3487 3488 case SADB_EXT_LIFETIME_HARD: 3489 if (!sav->lft_h) 3490 continue; 3491 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3492 p = sav->lft_h; 3493 break; 3494 3495 case SADB_EXT_LIFETIME_SOFT: 3496 if (!sav->lft_s) 3497 continue; 3498 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3499 p = sav->lft_s; 3500 break; 3501 3502 case SADB_X_EXT_NAT_T_TYPE: 3503 m = key_setsadbxtype(sav->natt_type); 3504 break; 3505 3506 case SADB_X_EXT_NAT_T_DPORT: 3507 if (sav->natt_type == 0) 3508 continue; 3509 m = key_setsadbxport( 3510 key_portfromsaddr(&sav->sah->saidx.dst), 3511 SADB_X_EXT_NAT_T_DPORT); 3512 break; 3513 3514 case SADB_X_EXT_NAT_T_SPORT: 3515 if (sav->natt_type == 0) 3516 continue; 3517 m = key_setsadbxport( 3518 key_portfromsaddr(&sav->sah->saidx.src), 3519 SADB_X_EXT_NAT_T_SPORT); 3520 break; 3521 3522 case SADB_X_EXT_NAT_T_FRAG: 3523 /* don't send frag info if not set */ 3524 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3525 continue; 3526 m = key_setsadbxfrag(sav->esp_frag); 3527 break; 3528 3529 case SADB_X_EXT_NAT_T_OAI: 3530 case SADB_X_EXT_NAT_T_OAR: 3531 continue; 3532 3533 case SADB_EXT_ADDRESS_PROXY: 3534 case SADB_EXT_IDENTITY_SRC: 3535 case SADB_EXT_IDENTITY_DST: 3536 /* XXX: should we brought from SPD ? */ 3537 case SADB_EXT_SENSITIVITY: 3538 default: 3539 continue; 3540 } 3541 3542 KASSERT(!(m && p)); 3543 if (!m && !p) 3544 goto fail; 3545 if (p && tres) { 3546 M_PREPEND(tres, l, M_DONTWAIT); 3547 if (!tres) 3548 goto fail; 3549 memcpy(mtod(tres, void *), p, l); 3550 continue; 3551 } 3552 if (p) { 3553 m = key_alloc_mbuf(l); 3554 if (!m) 3555 goto fail; 3556 m_copyback(m, 0, l, p); 3557 } 3558 3559 if (tres) 3560 m_cat(m, tres); 3561 tres = m; 3562 } 3563 3564 m_cat(result, tres); 3565 tres = NULL; /* avoid free on error below */ 3566 3567 if (result->m_len < sizeof(struct sadb_msg)) { 3568 result = m_pullup(result, sizeof(struct sadb_msg)); 3569 if (result == NULL) 3570 goto fail; 3571 } 3572 3573 result->m_pkthdr.len = 0; 3574 for (m = result; m; m = m->m_next) 3575 result->m_pkthdr.len += m->m_len; 3576 3577 mtod(result, struct sadb_msg *)->sadb_msg_len = 3578 PFKEY_UNIT64(result->m_pkthdr.len); 3579 3580 return result; 3581 3582 fail: 3583 m_freem(result); 3584 m_freem(tres); 3585 return NULL; 3586 } 3587 3588 3589 /* 3590 * set a type in sadb_x_nat_t_type 3591 */ 3592 static struct mbuf * 3593 key_setsadbxtype(u_int16_t type) 3594 { 3595 struct mbuf *m; 3596 size_t len; 3597 struct sadb_x_nat_t_type *p; 3598 3599 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3600 3601 m = key_alloc_mbuf(len); 3602 if (!m || m->m_next) { /*XXX*/ 3603 if (m) 3604 m_freem(m); 3605 return NULL; 3606 } 3607 3608 p = mtod(m, struct sadb_x_nat_t_type *); 3609 3610 memset(p, 0, len); 3611 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3612 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3613 p->sadb_x_nat_t_type_type = type; 3614 3615 return m; 3616 } 3617 /* 3618 * set a port in sadb_x_nat_t_port. port is in network order 3619 */ 3620 static struct mbuf * 3621 key_setsadbxport(u_int16_t port, u_int16_t type) 3622 { 3623 struct mbuf *m; 3624 size_t len; 3625 struct sadb_x_nat_t_port *p; 3626 3627 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3628 3629 m = key_alloc_mbuf(len); 3630 if (!m || m->m_next) { /*XXX*/ 3631 if (m) 3632 m_freem(m); 3633 return NULL; 3634 } 3635 3636 p = mtod(m, struct sadb_x_nat_t_port *); 3637 3638 memset(p, 0, len); 3639 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3640 p->sadb_x_nat_t_port_exttype = type; 3641 p->sadb_x_nat_t_port_port = port; 3642 3643 return m; 3644 } 3645 3646 /* 3647 * set fragmentation info in sadb_x_nat_t_frag 3648 */ 3649 static struct mbuf * 3650 key_setsadbxfrag(u_int16_t flen) 3651 { 3652 struct mbuf *m; 3653 size_t len; 3654 struct sadb_x_nat_t_frag *p; 3655 3656 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3657 3658 m = key_alloc_mbuf(len); 3659 if (!m || m->m_next) { /*XXX*/ 3660 if (m) 3661 m_freem(m); 3662 return NULL; 3663 } 3664 3665 p = mtod(m, struct sadb_x_nat_t_frag *); 3666 3667 memset(p, 0, len); 3668 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3669 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3670 p->sadb_x_nat_t_frag_fraglen = flen; 3671 3672 return m; 3673 } 3674 3675 /* 3676 * Get port from sockaddr, port is in network order 3677 */ 3678 u_int16_t 3679 key_portfromsaddr(const union sockaddr_union *saddr) 3680 { 3681 u_int16_t port; 3682 3683 switch (saddr->sa.sa_family) { 3684 case AF_INET: { 3685 port = saddr->sin.sin_port; 3686 break; 3687 } 3688 #ifdef INET6 3689 case AF_INET6: { 3690 port = saddr->sin6.sin6_port; 3691 break; 3692 } 3693 #endif 3694 default: 3695 printf("%s: unexpected address family\n", __func__); 3696 port = 0; 3697 break; 3698 } 3699 3700 return port; 3701 } 3702 3703 3704 /* 3705 * Set port is struct sockaddr. port is in network order 3706 */ 3707 static void 3708 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3709 { 3710 switch (saddr->sa.sa_family) { 3711 case AF_INET: { 3712 saddr->sin.sin_port = port; 3713 break; 3714 } 3715 #ifdef INET6 3716 case AF_INET6: { 3717 saddr->sin6.sin6_port = port; 3718 break; 3719 } 3720 #endif 3721 default: 3722 printf("%s: unexpected address family %d\n", __func__, 3723 saddr->sa.sa_family); 3724 break; 3725 } 3726 3727 return; 3728 } 3729 3730 /* 3731 * Safety check sa_len 3732 */ 3733 static int 3734 key_checksalen(const union sockaddr_union *saddr) 3735 { 3736 switch (saddr->sa.sa_family) { 3737 case AF_INET: 3738 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3739 return -1; 3740 break; 3741 #ifdef INET6 3742 case AF_INET6: 3743 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3744 return -1; 3745 break; 3746 #endif 3747 default: 3748 printf("%s: unexpected sa_family %d\n", __func__, 3749 saddr->sa.sa_family); 3750 return -1; 3751 break; 3752 } 3753 return 0; 3754 } 3755 3756 3757 /* 3758 * set data into sadb_msg. 3759 */ 3760 static struct mbuf * 3761 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3762 u_int32_t seq, pid_t pid, u_int16_t reserved) 3763 { 3764 struct mbuf *m; 3765 struct sadb_msg *p; 3766 int len; 3767 3768 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 3769 3770 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3771 3772 MGETHDR(m, M_DONTWAIT, MT_DATA); 3773 if (m && len > MHLEN) { 3774 MCLGET(m, M_DONTWAIT); 3775 if ((m->m_flags & M_EXT) == 0) { 3776 m_freem(m); 3777 m = NULL; 3778 } 3779 } 3780 if (!m) 3781 return NULL; 3782 m->m_pkthdr.len = m->m_len = len; 3783 m->m_next = NULL; 3784 3785 p = mtod(m, struct sadb_msg *); 3786 3787 memset(p, 0, len); 3788 p->sadb_msg_version = PF_KEY_V2; 3789 p->sadb_msg_type = type; 3790 p->sadb_msg_errno = 0; 3791 p->sadb_msg_satype = satype; 3792 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3793 p->sadb_msg_reserved = reserved; 3794 p->sadb_msg_seq = seq; 3795 p->sadb_msg_pid = (u_int32_t)pid; 3796 3797 return m; 3798 } 3799 3800 /* 3801 * copy secasvar data into sadb_address. 3802 */ 3803 static struct mbuf * 3804 key_setsadbsa(struct secasvar *sav) 3805 { 3806 struct mbuf *m; 3807 struct sadb_sa *p; 3808 int len; 3809 3810 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3811 m = key_alloc_mbuf(len); 3812 if (!m || m->m_next) { /*XXX*/ 3813 if (m) 3814 m_freem(m); 3815 return NULL; 3816 } 3817 3818 p = mtod(m, struct sadb_sa *); 3819 3820 memset(p, 0, len); 3821 p->sadb_sa_len = PFKEY_UNIT64(len); 3822 p->sadb_sa_exttype = SADB_EXT_SA; 3823 p->sadb_sa_spi = sav->spi; 3824 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3825 p->sadb_sa_state = sav->state; 3826 p->sadb_sa_auth = sav->alg_auth; 3827 p->sadb_sa_encrypt = sav->alg_enc; 3828 p->sadb_sa_flags = sav->flags; 3829 3830 return m; 3831 } 3832 3833 /* 3834 * set data into sadb_address. 3835 */ 3836 static struct mbuf * 3837 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3838 u_int8_t prefixlen, u_int16_t ul_proto) 3839 { 3840 struct mbuf *m; 3841 struct sadb_address *p; 3842 size_t len; 3843 3844 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3845 PFKEY_ALIGN8(saddr->sa_len); 3846 m = key_alloc_mbuf(len); 3847 if (!m || m->m_next) { /*XXX*/ 3848 if (m) 3849 m_freem(m); 3850 return NULL; 3851 } 3852 3853 p = mtod(m, struct sadb_address *); 3854 3855 memset(p, 0, len); 3856 p->sadb_address_len = PFKEY_UNIT64(len); 3857 p->sadb_address_exttype = exttype; 3858 p->sadb_address_proto = ul_proto; 3859 if (prefixlen == FULLMASK) { 3860 switch (saddr->sa_family) { 3861 case AF_INET: 3862 prefixlen = sizeof(struct in_addr) << 3; 3863 break; 3864 case AF_INET6: 3865 prefixlen = sizeof(struct in6_addr) << 3; 3866 break; 3867 default: 3868 ; /*XXX*/ 3869 } 3870 } 3871 p->sadb_address_prefixlen = prefixlen; 3872 p->sadb_address_reserved = 0; 3873 3874 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3875 saddr, saddr->sa_len); 3876 3877 return m; 3878 } 3879 3880 #if 0 3881 /* 3882 * set data into sadb_ident. 3883 */ 3884 static struct mbuf * 3885 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3886 void *string, int stringlen, u_int64_t id) 3887 { 3888 struct mbuf *m; 3889 struct sadb_ident *p; 3890 size_t len; 3891 3892 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3893 m = key_alloc_mbuf(len); 3894 if (!m || m->m_next) { /*XXX*/ 3895 if (m) 3896 m_freem(m); 3897 return NULL; 3898 } 3899 3900 p = mtod(m, struct sadb_ident *); 3901 3902 memset(p, 0, len); 3903 p->sadb_ident_len = PFKEY_UNIT64(len); 3904 p->sadb_ident_exttype = exttype; 3905 p->sadb_ident_type = idtype; 3906 p->sadb_ident_reserved = 0; 3907 p->sadb_ident_id = id; 3908 3909 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3910 string, stringlen); 3911 3912 return m; 3913 } 3914 #endif 3915 3916 /* 3917 * set data into sadb_x_sa2. 3918 */ 3919 static struct mbuf * 3920 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 3921 { 3922 struct mbuf *m; 3923 struct sadb_x_sa2 *p; 3924 size_t len; 3925 3926 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3927 m = key_alloc_mbuf(len); 3928 if (!m || m->m_next) { /*XXX*/ 3929 if (m) 3930 m_freem(m); 3931 return NULL; 3932 } 3933 3934 p = mtod(m, struct sadb_x_sa2 *); 3935 3936 memset(p, 0, len); 3937 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3938 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3939 p->sadb_x_sa2_mode = mode; 3940 p->sadb_x_sa2_reserved1 = 0; 3941 p->sadb_x_sa2_reserved2 = 0; 3942 p->sadb_x_sa2_sequence = seq; 3943 p->sadb_x_sa2_reqid = reqid; 3944 3945 return m; 3946 } 3947 3948 /* 3949 * set data into sadb_x_policy 3950 */ 3951 static struct mbuf * 3952 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3953 { 3954 struct mbuf *m; 3955 struct sadb_x_policy *p; 3956 size_t len; 3957 3958 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3959 m = key_alloc_mbuf(len); 3960 if (!m || m->m_next) { /*XXX*/ 3961 if (m) 3962 m_freem(m); 3963 return NULL; 3964 } 3965 3966 p = mtod(m, struct sadb_x_policy *); 3967 3968 memset(p, 0, len); 3969 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3970 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3971 p->sadb_x_policy_type = type; 3972 p->sadb_x_policy_dir = dir; 3973 p->sadb_x_policy_id = id; 3974 3975 return m; 3976 } 3977 3978 /* %%% utilities */ 3979 /* 3980 * copy a buffer into the new buffer allocated. 3981 */ 3982 static void * 3983 key_newbuf(const void *src, u_int len) 3984 { 3985 void *new; 3986 3987 new = kmem_alloc(len, KM_SLEEP); 3988 memcpy(new, src, len); 3989 3990 return new; 3991 } 3992 3993 /* compare my own address 3994 * OUT: 1: true, i.e. my address. 3995 * 0: false 3996 */ 3997 int 3998 key_ismyaddr(const struct sockaddr *sa) 3999 { 4000 #ifdef INET 4001 const struct sockaddr_in *sin; 4002 const struct in_ifaddr *ia; 4003 int s; 4004 #endif 4005 4006 KASSERT(sa != NULL); 4007 4008 switch (sa->sa_family) { 4009 #ifdef INET 4010 case AF_INET: 4011 sin = (const struct sockaddr_in *)sa; 4012 s = pserialize_read_enter(); 4013 IN_ADDRLIST_READER_FOREACH(ia) { 4014 if (sin->sin_family == ia->ia_addr.sin_family && 4015 sin->sin_len == ia->ia_addr.sin_len && 4016 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4017 { 4018 pserialize_read_exit(s); 4019 return 1; 4020 } 4021 } 4022 pserialize_read_exit(s); 4023 break; 4024 #endif 4025 #ifdef INET6 4026 case AF_INET6: 4027 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4028 #endif 4029 } 4030 4031 return 0; 4032 } 4033 4034 #ifdef INET6 4035 /* 4036 * compare my own address for IPv6. 4037 * 1: ours 4038 * 0: other 4039 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4040 */ 4041 #include <netinet6/in6_var.h> 4042 4043 static int 4044 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4045 { 4046 struct in6_ifaddr *ia; 4047 int s; 4048 struct psref psref; 4049 int bound; 4050 int ours = 1; 4051 4052 bound = curlwp_bind(); 4053 s = pserialize_read_enter(); 4054 IN6_ADDRLIST_READER_FOREACH(ia) { 4055 bool ingroup; 4056 4057 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4058 (const struct sockaddr *)&ia->ia_addr, 0)) { 4059 pserialize_read_exit(s); 4060 goto ours; 4061 } 4062 ia6_acquire(ia, &psref); 4063 pserialize_read_exit(s); 4064 4065 /* 4066 * XXX Multicast 4067 * XXX why do we care about multlicast here while we don't care 4068 * about IPv4 multicast?? 4069 * XXX scope 4070 */ 4071 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4072 if (ingroup) { 4073 ia6_release(ia, &psref); 4074 goto ours; 4075 } 4076 4077 s = pserialize_read_enter(); 4078 ia6_release(ia, &psref); 4079 } 4080 pserialize_read_exit(s); 4081 4082 /* loopback, just for safety */ 4083 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4084 goto ours; 4085 4086 ours = 0; 4087 ours: 4088 curlwp_bindx(bound); 4089 4090 return ours; 4091 } 4092 #endif /*INET6*/ 4093 4094 /* 4095 * compare two secasindex structure. 4096 * flag can specify to compare 2 saidxes. 4097 * compare two secasindex structure without both mode and reqid. 4098 * don't compare port. 4099 * IN: 4100 * saidx0: source, it can be in SAD. 4101 * saidx1: object. 4102 * OUT: 4103 * 1 : equal 4104 * 0 : not equal 4105 */ 4106 static int 4107 key_saidx_match( 4108 const struct secasindex *saidx0, 4109 const struct secasindex *saidx1, 4110 int flag) 4111 { 4112 int chkport; 4113 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4114 4115 KASSERT(saidx0 != NULL); 4116 KASSERT(saidx1 != NULL); 4117 4118 /* sanity */ 4119 if (saidx0->proto != saidx1->proto) 4120 return 0; 4121 4122 if (flag == CMP_EXACTLY) { 4123 if (saidx0->mode != saidx1->mode) 4124 return 0; 4125 if (saidx0->reqid != saidx1->reqid) 4126 return 0; 4127 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4128 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4129 return 0; 4130 } else { 4131 4132 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4133 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4134 /* 4135 * If reqid of SPD is non-zero, unique SA is required. 4136 * The result must be of same reqid in this case. 4137 */ 4138 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4139 return 0; 4140 } 4141 4142 if (flag == CMP_MODE_REQID) { 4143 if (saidx0->mode != IPSEC_MODE_ANY && 4144 saidx0->mode != saidx1->mode) 4145 return 0; 4146 } 4147 4148 4149 sa0src = &saidx0->src.sa; 4150 sa0dst = &saidx0->dst.sa; 4151 sa1src = &saidx1->src.sa; 4152 sa1dst = &saidx1->dst.sa; 4153 /* 4154 * If NAT-T is enabled, check ports for tunnel mode. 4155 * Don't do it for transport mode, as there is no 4156 * port information available in the SP. 4157 * Also don't check ports if they are set to zero 4158 * in the SPD: This means we have a non-generated 4159 * SPD which can't know UDP ports. 4160 */ 4161 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4162 chkport = PORT_LOOSE; 4163 else 4164 chkport = PORT_NONE; 4165 4166 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4167 return 0; 4168 } 4169 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4170 return 0; 4171 } 4172 } 4173 4174 return 1; 4175 } 4176 4177 /* 4178 * compare two secindex structure exactly. 4179 * IN: 4180 * spidx0: source, it is often in SPD. 4181 * spidx1: object, it is often from PFKEY message. 4182 * OUT: 4183 * 1 : equal 4184 * 0 : not equal 4185 */ 4186 static int 4187 key_spidx_match_exactly( 4188 const struct secpolicyindex *spidx0, 4189 const struct secpolicyindex *spidx1) 4190 { 4191 4192 KASSERT(spidx0 != NULL); 4193 KASSERT(spidx1 != NULL); 4194 4195 /* sanity */ 4196 if (spidx0->prefs != spidx1->prefs || 4197 spidx0->prefd != spidx1->prefd || 4198 spidx0->ul_proto != spidx1->ul_proto) 4199 return 0; 4200 4201 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4202 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4203 } 4204 4205 /* 4206 * compare two secindex structure with mask. 4207 * IN: 4208 * spidx0: source, it is often in SPD. 4209 * spidx1: object, it is often from IP header. 4210 * OUT: 4211 * 1 : equal 4212 * 0 : not equal 4213 */ 4214 static int 4215 key_spidx_match_withmask( 4216 const struct secpolicyindex *spidx0, 4217 const struct secpolicyindex *spidx1) 4218 { 4219 4220 KASSERT(spidx0 != NULL); 4221 KASSERT(spidx1 != NULL); 4222 4223 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4224 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4225 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4226 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4227 return 0; 4228 4229 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4230 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4231 spidx0->ul_proto != spidx1->ul_proto) 4232 return 0; 4233 4234 switch (spidx0->src.sa.sa_family) { 4235 case AF_INET: 4236 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4237 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4238 return 0; 4239 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4240 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4241 return 0; 4242 break; 4243 case AF_INET6: 4244 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4245 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4246 return 0; 4247 /* 4248 * scope_id check. if sin6_scope_id is 0, we regard it 4249 * as a wildcard scope, which matches any scope zone ID. 4250 */ 4251 if (spidx0->src.sin6.sin6_scope_id && 4252 spidx1->src.sin6.sin6_scope_id && 4253 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4254 return 0; 4255 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4256 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4257 return 0; 4258 break; 4259 default: 4260 /* XXX */ 4261 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4262 return 0; 4263 break; 4264 } 4265 4266 switch (spidx0->dst.sa.sa_family) { 4267 case AF_INET: 4268 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4269 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4270 return 0; 4271 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4272 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4273 return 0; 4274 break; 4275 case AF_INET6: 4276 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4277 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4278 return 0; 4279 /* 4280 * scope_id check. if sin6_scope_id is 0, we regard it 4281 * as a wildcard scope, which matches any scope zone ID. 4282 */ 4283 if (spidx0->src.sin6.sin6_scope_id && 4284 spidx1->src.sin6.sin6_scope_id && 4285 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4286 return 0; 4287 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4288 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4289 return 0; 4290 break; 4291 default: 4292 /* XXX */ 4293 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4294 return 0; 4295 break; 4296 } 4297 4298 /* XXX Do we check other field ? e.g. flowinfo */ 4299 4300 return 1; 4301 } 4302 4303 /* returns 0 on match */ 4304 static int 4305 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4306 { 4307 switch (howport) { 4308 case PORT_NONE: 4309 return 0; 4310 case PORT_LOOSE: 4311 if (port1 == 0 || port2 == 0) 4312 return 0; 4313 /*FALLTHROUGH*/ 4314 case PORT_STRICT: 4315 if (port1 != port2) { 4316 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4317 "port fail %d != %d\n", port1, port2); 4318 return 1; 4319 } 4320 return 0; 4321 default: 4322 KASSERT(0); 4323 return 1; 4324 } 4325 } 4326 4327 /* returns 1 on match */ 4328 static int 4329 key_sockaddr_match( 4330 const struct sockaddr *sa1, 4331 const struct sockaddr *sa2, 4332 int howport) 4333 { 4334 const struct sockaddr_in *sin1, *sin2; 4335 const struct sockaddr_in6 *sin61, *sin62; 4336 4337 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4338 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4339 "fam/len fail %d != %d || %d != %d\n", 4340 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4341 sa2->sa_len); 4342 return 0; 4343 } 4344 4345 switch (sa1->sa_family) { 4346 case AF_INET: 4347 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4348 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4349 "len fail %d != %zu\n", 4350 sa1->sa_len, sizeof(struct sockaddr_in)); 4351 return 0; 4352 } 4353 sin1 = (const struct sockaddr_in *)sa1; 4354 sin2 = (const struct sockaddr_in *)sa2; 4355 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4356 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4357 "addr fail %#x != %#x\n", 4358 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4359 return 0; 4360 } 4361 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4362 return 0; 4363 } 4364 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4365 "addr success %#x[%d] == %#x[%d]\n", 4366 sin1->sin_addr.s_addr, sin1->sin_port, 4367 sin2->sin_addr.s_addr, sin2->sin_port); 4368 break; 4369 case AF_INET6: 4370 sin61 = (const struct sockaddr_in6 *)sa1; 4371 sin62 = (const struct sockaddr_in6 *)sa2; 4372 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4373 return 0; /*EINVAL*/ 4374 4375 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4376 return 0; 4377 } 4378 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4379 return 0; 4380 } 4381 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4382 return 0; 4383 } 4384 break; 4385 default: 4386 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4387 return 0; 4388 break; 4389 } 4390 4391 return 1; 4392 } 4393 4394 /* 4395 * compare two buffers with mask. 4396 * IN: 4397 * addr1: source 4398 * addr2: object 4399 * bits: Number of bits to compare 4400 * OUT: 4401 * 1 : equal 4402 * 0 : not equal 4403 */ 4404 static int 4405 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4406 { 4407 const unsigned char *p1 = a1; 4408 const unsigned char *p2 = a2; 4409 4410 /* XXX: This could be considerably faster if we compare a word 4411 * at a time, but it is complicated on LSB Endian machines */ 4412 4413 /* Handle null pointers */ 4414 if (p1 == NULL || p2 == NULL) 4415 return (p1 == p2); 4416 4417 while (bits >= 8) { 4418 if (*p1++ != *p2++) 4419 return 0; 4420 bits -= 8; 4421 } 4422 4423 if (bits > 0) { 4424 u_int8_t mask = ~((1<<(8-bits))-1); 4425 if ((*p1 & mask) != (*p2 & mask)) 4426 return 0; 4427 } 4428 return 1; /* Match! */ 4429 } 4430 4431 static void 4432 key_timehandler_spd(time_t now) 4433 { 4434 u_int dir; 4435 struct secpolicy *sp, *nextsp; 4436 4437 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4438 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 4439 if (sp->state == IPSEC_SPSTATE_DEAD) { 4440 key_sp_unlink(sp); /*XXX*/ 4441 4442 /* 'sp' dead; continue transfers to 4443 * 'sp = nextsp' 4444 */ 4445 continue; 4446 } 4447 4448 if (sp->lifetime == 0 && sp->validtime == 0) 4449 continue; 4450 4451 /* the deletion will occur next time */ 4452 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4453 (sp->validtime && now - sp->lastused > sp->validtime)) { 4454 key_sp_dead(sp); 4455 key_spdexpire(sp); 4456 continue; 4457 } 4458 } 4459 } 4460 } 4461 4462 static void 4463 key_timehandler_sad(time_t now) 4464 { 4465 struct secashead *sah, *nextsah; 4466 struct secasvar *sav, *nextsav; 4467 4468 LIST_FOREACH_SAFE(sah, &sahtree, chain, nextsah) { 4469 /* if sah has been dead, then delete it and process next sah. */ 4470 if (sah->state == SADB_SASTATE_DEAD) { 4471 key_delsah(sah); 4472 continue; 4473 } 4474 4475 /* if LARVAL entry doesn't become MATURE, delete it. */ 4476 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], 4477 chain, nextsav) { 4478 if (now - sav->created > key_larval_lifetime) { 4479 KEY_FREESAV(&sav); 4480 } 4481 } 4482 4483 /* 4484 * check MATURE entry to start to send expire message 4485 * whether or not. 4486 */ 4487 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], 4488 chain, nextsav) { 4489 /* we don't need to check. */ 4490 if (sav->lft_s == NULL) 4491 continue; 4492 4493 /* sanity check */ 4494 if (sav->lft_c == NULL) { 4495 IPSECLOG(LOG_DEBUG, 4496 "There is no CURRENT time, why?\n"); 4497 continue; 4498 } 4499 4500 /* check SOFT lifetime */ 4501 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4502 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4503 /* 4504 * check SA to be used whether or not. 4505 * when SA hasn't been used, delete it. 4506 */ 4507 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4508 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4509 KEY_FREESAV(&sav); 4510 } else { 4511 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4512 /* 4513 * XXX If we keep to send expire 4514 * message in the status of 4515 * DYING. Do remove below code. 4516 */ 4517 key_expire(sav); 4518 } 4519 } 4520 /* check SOFT lifetime by bytes */ 4521 /* 4522 * XXX I don't know the way to delete this SA 4523 * when new SA is installed. Caution when it's 4524 * installed too big lifetime by time. 4525 */ 4526 else if (sav->lft_s->sadb_lifetime_bytes != 0 && 4527 sav->lft_s->sadb_lifetime_bytes < 4528 sav->lft_c->sadb_lifetime_bytes) { 4529 4530 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4531 /* 4532 * XXX If we keep to send expire 4533 * message in the status of 4534 * DYING. Do remove below code. 4535 */ 4536 key_expire(sav); 4537 } 4538 } 4539 4540 /* check DYING entry to change status to DEAD. */ 4541 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], 4542 chain, nextsav) { 4543 /* we don't need to check. */ 4544 if (sav->lft_h == NULL) 4545 continue; 4546 4547 /* sanity check */ 4548 if (sav->lft_c == NULL) { 4549 IPSECLOG(LOG_DEBUG, 4550 "There is no CURRENT time, why?\n"); 4551 continue; 4552 } 4553 4554 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4555 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4556 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4557 KEY_FREESAV(&sav); 4558 } 4559 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4560 else if (sav->lft_s != NULL 4561 && sav->lft_s->sadb_lifetime_addtime != 0 4562 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4563 /* 4564 * XXX: should be checked to be 4565 * installed the valid SA. 4566 */ 4567 4568 /* 4569 * If there is no SA then sending 4570 * expire message. 4571 */ 4572 key_expire(sav); 4573 } 4574 #endif 4575 /* check HARD lifetime by bytes */ 4576 else if (sav->lft_h->sadb_lifetime_bytes != 0 && 4577 sav->lft_h->sadb_lifetime_bytes < 4578 sav->lft_c->sadb_lifetime_bytes) { 4579 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4580 KEY_FREESAV(&sav); 4581 } 4582 } 4583 4584 /* delete entry in DEAD */ 4585 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], 4586 chain, nextsav) { 4587 /* sanity check */ 4588 if (sav->state != SADB_SASTATE_DEAD) { 4589 IPSECLOG(LOG_DEBUG, 4590 "invalid sav->state (queue: %d SA: %d): " 4591 "kill it anyway\n", 4592 SADB_SASTATE_DEAD, sav->state); 4593 } 4594 4595 /* 4596 * do not call key_freesav() here. 4597 * sav should already be freed, and sav->refcnt 4598 * shows other references to sav 4599 * (such as from SPD). 4600 */ 4601 } 4602 } 4603 } 4604 4605 static void 4606 key_timehandler_acq(time_t now) 4607 { 4608 #ifndef IPSEC_NONBLOCK_ACQUIRE 4609 struct secacq *acq, *nextacq; 4610 4611 restart: 4612 mutex_enter(&key_mtx); 4613 LIST_FOREACH_SAFE(acq, &acqtree, chain, nextacq) { 4614 if (now - acq->created > key_blockacq_lifetime) { 4615 LIST_REMOVE(acq, chain); 4616 mutex_exit(&key_mtx); 4617 kmem_free(acq, sizeof(*acq)); 4618 goto restart; 4619 } 4620 } 4621 mutex_exit(&key_mtx); 4622 #endif 4623 } 4624 4625 static void 4626 key_timehandler_spacq(time_t now) 4627 { 4628 #ifdef notyet 4629 struct secspacq *acq, *nextacq; 4630 4631 LIST_FOREACH_SAFE(acq, &spacqtree, chain, nextacq) { 4632 if (now - acq->created > key_blockacq_lifetime) { 4633 KASSERT(__LIST_CHAINED(acq)); 4634 LIST_REMOVE(acq, chain); 4635 kmem_free(acq, sizeof(*acq)); 4636 } 4637 } 4638 #endif 4639 } 4640 4641 /* 4642 * time handler. 4643 * scanning SPD and SAD to check status for each entries, 4644 * and do to remove or to expire. 4645 */ 4646 static void 4647 key_timehandler_work(struct work *wk, void *arg) 4648 { 4649 int s; 4650 time_t now = time_uptime; 4651 4652 s = splsoftnet(); 4653 mutex_enter(softnet_lock); 4654 4655 key_timehandler_spd(now); 4656 key_timehandler_sad(now); 4657 key_timehandler_acq(now); 4658 key_timehandler_spacq(now); 4659 4660 /* do exchange to tick time !! */ 4661 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4662 4663 mutex_exit(softnet_lock); 4664 splx(s); 4665 return; 4666 } 4667 4668 static void 4669 key_timehandler(void *arg) 4670 { 4671 4672 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 4673 } 4674 4675 u_long 4676 key_random(void) 4677 { 4678 u_long value; 4679 4680 key_randomfill(&value, sizeof(value)); 4681 return value; 4682 } 4683 4684 void 4685 key_randomfill(void *p, size_t l) 4686 { 4687 4688 cprng_fast(p, l); 4689 } 4690 4691 /* 4692 * map SADB_SATYPE_* to IPPROTO_*. 4693 * if satype == SADB_SATYPE then satype is mapped to ~0. 4694 * OUT: 4695 * 0: invalid satype. 4696 */ 4697 static u_int16_t 4698 key_satype2proto(u_int8_t satype) 4699 { 4700 switch (satype) { 4701 case SADB_SATYPE_UNSPEC: 4702 return IPSEC_PROTO_ANY; 4703 case SADB_SATYPE_AH: 4704 return IPPROTO_AH; 4705 case SADB_SATYPE_ESP: 4706 return IPPROTO_ESP; 4707 case SADB_X_SATYPE_IPCOMP: 4708 return IPPROTO_IPCOMP; 4709 case SADB_X_SATYPE_TCPSIGNATURE: 4710 return IPPROTO_TCP; 4711 default: 4712 return 0; 4713 } 4714 /* NOTREACHED */ 4715 } 4716 4717 /* 4718 * map IPPROTO_* to SADB_SATYPE_* 4719 * OUT: 4720 * 0: invalid protocol type. 4721 */ 4722 static u_int8_t 4723 key_proto2satype(u_int16_t proto) 4724 { 4725 switch (proto) { 4726 case IPPROTO_AH: 4727 return SADB_SATYPE_AH; 4728 case IPPROTO_ESP: 4729 return SADB_SATYPE_ESP; 4730 case IPPROTO_IPCOMP: 4731 return SADB_X_SATYPE_IPCOMP; 4732 case IPPROTO_TCP: 4733 return SADB_X_SATYPE_TCPSIGNATURE; 4734 default: 4735 return 0; 4736 } 4737 /* NOTREACHED */ 4738 } 4739 4740 static int 4741 key_setsecasidx(int proto, int mode, int reqid, 4742 const struct sockaddr *src, const struct sockaddr *dst, 4743 struct secasindex * saidx) 4744 { 4745 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 4746 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 4747 4748 /* sa len safety check */ 4749 if (key_checksalen(src_u) != 0) 4750 return -1; 4751 if (key_checksalen(dst_u) != 0) 4752 return -1; 4753 4754 memset(saidx, 0, sizeof(*saidx)); 4755 saidx->proto = proto; 4756 saidx->mode = mode; 4757 saidx->reqid = reqid; 4758 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4759 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4760 4761 key_porttosaddr(&((saidx)->src), 0); 4762 key_porttosaddr(&((saidx)->dst), 0); 4763 return 0; 4764 } 4765 4766 static void 4767 key_init_spidx_bymsghdr(struct secpolicyindex *spidx, 4768 const struct sadb_msghdr *mhp) 4769 { 4770 const struct sadb_address *src0, *dst0; 4771 const struct sockaddr *src, *dst; 4772 const struct sadb_x_policy *xpl0; 4773 4774 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4775 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4776 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4777 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4778 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 4779 4780 memset(spidx, 0, sizeof(*spidx)); 4781 spidx->dir = xpl0->sadb_x_policy_dir; 4782 spidx->prefs = src0->sadb_address_prefixlen; 4783 spidx->prefd = dst0->sadb_address_prefixlen; 4784 spidx->ul_proto = src0->sadb_address_proto; 4785 /* XXX boundary check against sa_len */ 4786 memcpy(&spidx->src, src, src->sa_len); 4787 memcpy(&spidx->dst, dst, dst->sa_len); 4788 } 4789 4790 /* %%% PF_KEY */ 4791 /* 4792 * SADB_GETSPI processing is to receive 4793 * <base, (SA2), src address, dst address, (SPI range)> 4794 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4795 * tree with the status of LARVAL, and send 4796 * <base, SA(*), address(SD)> 4797 * to the IKMPd. 4798 * 4799 * IN: mhp: pointer to the pointer to each header. 4800 * OUT: NULL if fail. 4801 * other if success, return pointer to the message to send. 4802 */ 4803 static int 4804 key_api_getspi(struct socket *so, struct mbuf *m, 4805 const struct sadb_msghdr *mhp) 4806 { 4807 const struct sockaddr *src, *dst; 4808 struct secasindex saidx; 4809 struct secashead *newsah; 4810 struct secasvar *newsav; 4811 u_int8_t proto; 4812 u_int32_t spi; 4813 u_int8_t mode; 4814 u_int16_t reqid; 4815 int error; 4816 4817 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4818 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4819 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4820 return key_senderror(so, m, EINVAL); 4821 } 4822 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4823 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4824 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4825 return key_senderror(so, m, EINVAL); 4826 } 4827 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4828 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4829 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4830 } else { 4831 mode = IPSEC_MODE_ANY; 4832 reqid = 0; 4833 } 4834 4835 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4836 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4837 4838 /* map satype to proto */ 4839 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 4840 if (proto == 0) { 4841 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 4842 return key_senderror(so, m, EINVAL); 4843 } 4844 4845 4846 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 4847 if (error != 0) 4848 return key_senderror(so, m, EINVAL); 4849 4850 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 4851 if (error != 0) 4852 return key_senderror(so, m, EINVAL); 4853 4854 /* SPI allocation */ 4855 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4856 &saidx); 4857 if (spi == 0) 4858 return key_senderror(so, m, EINVAL); 4859 4860 /* get a SA index */ 4861 newsah = key_getsah(&saidx, CMP_REQID); 4862 if (newsah == NULL) { 4863 /* create a new SA index */ 4864 newsah = key_newsah(&saidx); 4865 if (newsah == NULL) { 4866 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 4867 return key_senderror(so, m, ENOBUFS); 4868 } 4869 } 4870 4871 /* get a new SA */ 4872 /* XXX rewrite */ 4873 newsav = KEY_NEWSAV(m, mhp, &error); 4874 if (newsav == NULL) { 4875 /* XXX don't free new SA index allocated in above. */ 4876 return key_senderror(so, m, error); 4877 } 4878 4879 /* set spi */ 4880 newsav->spi = htonl(spi); 4881 4882 /* add to satree */ 4883 newsav->refcnt = 1; 4884 newsav->sah = newsah; 4885 newsav->state = SADB_SASTATE_LARVAL; 4886 LIST_INSERT_TAIL(&newsah->savtree[SADB_SASTATE_LARVAL], newsav, 4887 secasvar, chain); 4888 4889 #ifndef IPSEC_NONBLOCK_ACQUIRE 4890 /* delete the entry in acqtree */ 4891 if (mhp->msg->sadb_msg_seq != 0) { 4892 struct secacq *acq; 4893 mutex_enter(&key_mtx); 4894 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 4895 if (acq != NULL) { 4896 /* reset counter in order to deletion by timehandler. */ 4897 acq->created = time_uptime; 4898 acq->count = 0; 4899 } 4900 mutex_exit(&key_mtx); 4901 } 4902 #endif 4903 4904 { 4905 struct mbuf *n, *nn; 4906 struct sadb_sa *m_sa; 4907 int off, len; 4908 4909 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4910 PFKEY_ALIGN8(sizeof(struct sadb_sa)) <= MCLBYTES); 4911 4912 /* create new sadb_msg to reply. */ 4913 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4914 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4915 4916 MGETHDR(n, M_DONTWAIT, MT_DATA); 4917 if (len > MHLEN) { 4918 MCLGET(n, M_DONTWAIT); 4919 if ((n->m_flags & M_EXT) == 0) { 4920 m_freem(n); 4921 n = NULL; 4922 } 4923 } 4924 if (!n) 4925 return key_senderror(so, m, ENOBUFS); 4926 4927 n->m_len = len; 4928 n->m_next = NULL; 4929 off = 0; 4930 4931 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4932 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4933 4934 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4935 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4936 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4937 m_sa->sadb_sa_spi = htonl(spi); 4938 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4939 4940 KASSERTMSG(off == len, "length inconsistency"); 4941 4942 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4943 SADB_EXT_ADDRESS_DST); 4944 if (!n->m_next) { 4945 m_freem(n); 4946 return key_senderror(so, m, ENOBUFS); 4947 } 4948 4949 if (n->m_len < sizeof(struct sadb_msg)) { 4950 n = m_pullup(n, sizeof(struct sadb_msg)); 4951 if (n == NULL) 4952 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4953 } 4954 4955 n->m_pkthdr.len = 0; 4956 for (nn = n; nn; nn = nn->m_next) 4957 n->m_pkthdr.len += nn->m_len; 4958 4959 key_fill_replymsg(n, newsav->seq); 4960 4961 m_freem(m); 4962 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4963 } 4964 } 4965 4966 /* 4967 * allocating new SPI 4968 * called by key_api_getspi(). 4969 * OUT: 4970 * 0: failure. 4971 * others: success. 4972 */ 4973 static u_int32_t 4974 key_do_getnewspi(const struct sadb_spirange *spirange, 4975 const struct secasindex *saidx) 4976 { 4977 u_int32_t newspi; 4978 u_int32_t spmin, spmax; 4979 int count = key_spi_trycnt; 4980 4981 /* set spi range to allocate */ 4982 if (spirange != NULL) { 4983 spmin = spirange->sadb_spirange_min; 4984 spmax = spirange->sadb_spirange_max; 4985 } else { 4986 spmin = key_spi_minval; 4987 spmax = key_spi_maxval; 4988 } 4989 /* IPCOMP needs 2-byte SPI */ 4990 if (saidx->proto == IPPROTO_IPCOMP) { 4991 u_int32_t t; 4992 if (spmin >= 0x10000) 4993 spmin = 0xffff; 4994 if (spmax >= 0x10000) 4995 spmax = 0xffff; 4996 if (spmin > spmax) { 4997 t = spmin; spmin = spmax; spmax = t; 4998 } 4999 } 5000 5001 if (spmin == spmax) { 5002 if (key_checkspidup(saidx, htonl(spmin))) { 5003 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 5004 return 0; 5005 } 5006 5007 count--; /* taking one cost. */ 5008 newspi = spmin; 5009 5010 } else { 5011 5012 /* init SPI */ 5013 newspi = 0; 5014 5015 /* when requesting to allocate spi ranged */ 5016 while (count--) { 5017 /* generate pseudo-random SPI value ranged. */ 5018 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5019 5020 if (!key_checkspidup(saidx, htonl(newspi))) 5021 break; 5022 } 5023 5024 if (count == 0 || newspi == 0) { 5025 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5026 return 0; 5027 } 5028 } 5029 5030 /* statistics */ 5031 keystat.getspi_count = 5032 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5033 5034 return newspi; 5035 } 5036 5037 static int 5038 key_handle_natt_info(struct secasvar *sav, 5039 const struct sadb_msghdr *mhp) 5040 { 5041 const char *msg = "?" ; 5042 struct sadb_x_nat_t_type *type; 5043 struct sadb_x_nat_t_port *sport, *dport; 5044 struct sadb_address *iaddr, *raddr; 5045 struct sadb_x_nat_t_frag *frag; 5046 5047 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5048 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5049 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5050 return 0; 5051 5052 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5053 msg = "TYPE"; 5054 goto bad; 5055 } 5056 5057 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5058 msg = "SPORT"; 5059 goto bad; 5060 } 5061 5062 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5063 msg = "DPORT"; 5064 goto bad; 5065 } 5066 5067 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5068 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5069 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5070 msg = "OAI"; 5071 goto bad; 5072 } 5073 } 5074 5075 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5076 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5077 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5078 msg = "OAR"; 5079 goto bad; 5080 } 5081 } 5082 5083 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5084 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5085 msg = "FRAG"; 5086 goto bad; 5087 } 5088 } 5089 5090 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5091 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5092 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5093 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5094 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5095 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5096 5097 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5098 type->sadb_x_nat_t_type_type, 5099 ntohs(sport->sadb_x_nat_t_port_port), 5100 ntohs(dport->sadb_x_nat_t_port_port)); 5101 5102 sav->natt_type = type->sadb_x_nat_t_type_type; 5103 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5104 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5105 if (frag) 5106 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5107 else 5108 sav->esp_frag = IP_MAXPACKET; 5109 5110 return 0; 5111 bad: 5112 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5113 __USE(msg); 5114 return -1; 5115 } 5116 5117 /* Just update the IPSEC_NAT_T ports if present */ 5118 static int 5119 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5120 const struct sadb_msghdr *mhp) 5121 { 5122 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5123 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5124 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5125 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5126 5127 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5128 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5129 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5130 struct sadb_x_nat_t_type *type; 5131 struct sadb_x_nat_t_port *sport; 5132 struct sadb_x_nat_t_port *dport; 5133 5134 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5135 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5136 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5137 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5138 return -1; 5139 } 5140 5141 type = (struct sadb_x_nat_t_type *) 5142 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5143 sport = (struct sadb_x_nat_t_port *) 5144 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5145 dport = (struct sadb_x_nat_t_port *) 5146 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5147 5148 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5149 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5150 5151 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5152 type->sadb_x_nat_t_type_type, 5153 ntohs(sport->sadb_x_nat_t_port_port), 5154 ntohs(dport->sadb_x_nat_t_port_port)); 5155 } 5156 5157 return 0; 5158 } 5159 5160 5161 /* 5162 * SADB_UPDATE processing 5163 * receive 5164 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5165 * key(AE), (identity(SD),) (sensitivity)> 5166 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5167 * and send 5168 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5169 * (identity(SD),) (sensitivity)> 5170 * to the ikmpd. 5171 * 5172 * m will always be freed. 5173 */ 5174 static int 5175 key_api_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5176 { 5177 struct sadb_sa *sa0; 5178 const struct sockaddr *src, *dst; 5179 struct secasindex saidx; 5180 struct secashead *sah; 5181 struct secasvar *sav, *newsav; 5182 u_int16_t proto; 5183 u_int8_t mode; 5184 u_int16_t reqid; 5185 int error; 5186 5187 /* map satype to proto */ 5188 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5189 if (proto == 0) { 5190 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5191 return key_senderror(so, m, EINVAL); 5192 } 5193 5194 if (mhp->ext[SADB_EXT_SA] == NULL || 5195 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5196 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5197 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5198 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5199 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5200 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5201 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5202 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5203 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5204 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5205 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5206 return key_senderror(so, m, EINVAL); 5207 } 5208 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5209 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5210 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5211 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5212 return key_senderror(so, m, EINVAL); 5213 } 5214 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5215 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5216 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5217 } else { 5218 mode = IPSEC_MODE_ANY; 5219 reqid = 0; 5220 } 5221 /* XXX boundary checking for other extensions */ 5222 5223 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5224 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5225 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5226 5227 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5228 if (error != 0) 5229 return key_senderror(so, m, EINVAL); 5230 5231 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5232 if (error != 0) 5233 return key_senderror(so, m, EINVAL); 5234 5235 /* get a SA header */ 5236 sah = key_getsah(&saidx, CMP_REQID); 5237 if (sah == NULL) { 5238 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5239 return key_senderror(so, m, ENOENT); 5240 } 5241 5242 /* set spidx if there */ 5243 /* XXX rewrite */ 5244 error = key_setident(sah, m, mhp); 5245 if (error) 5246 return key_senderror(so, m, error); 5247 5248 /* find a SA with sequence number. */ 5249 #ifdef IPSEC_DOSEQCHECK 5250 if (mhp->msg->sadb_msg_seq != 0) { 5251 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5252 if (sav == NULL) { 5253 IPSECLOG(LOG_DEBUG, 5254 "no larval SA with sequence %u exists.\n", 5255 mhp->msg->sadb_msg_seq); 5256 return key_senderror(so, m, ENOENT); 5257 } 5258 } 5259 #else 5260 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5261 if (sav == NULL) { 5262 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5263 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5264 return key_senderror(so, m, EINVAL); 5265 } 5266 #endif 5267 5268 /* validity check */ 5269 if (sav->sah->saidx.proto != proto) { 5270 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5271 sav->sah->saidx.proto, proto); 5272 error = EINVAL; 5273 goto error; 5274 } 5275 #ifdef IPSEC_DOSEQCHECK 5276 if (sav->spi != sa0->sadb_sa_spi) { 5277 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5278 (u_int32_t)ntohl(sav->spi), 5279 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5280 error = EINVAL; 5281 goto error; 5282 } 5283 #endif 5284 if (sav->pid != mhp->msg->sadb_msg_pid) { 5285 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5286 sav->pid, mhp->msg->sadb_msg_pid); 5287 error = EINVAL; 5288 goto error; 5289 } 5290 5291 /* 5292 * Allocate a new SA instead of modifying the existing SA directly 5293 * to avoid race conditions. 5294 */ 5295 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 5296 5297 /* copy sav values */ 5298 newsav->spi = sav->spi; 5299 newsav->seq = sav->seq; 5300 newsav->created = sav->created; 5301 newsav->pid = sav->pid; 5302 newsav->sah = sav->sah; 5303 5304 error = key_setsaval(newsav, m, mhp); 5305 if (error) { 5306 key_delsav(newsav); 5307 goto error; 5308 } 5309 5310 error = key_handle_natt_info(newsav, mhp); 5311 if (error != 0) { 5312 key_delsav(newsav); 5313 goto error; 5314 } 5315 5316 error = key_init_xform(newsav); 5317 if (error != 0) { 5318 key_delsav(newsav); 5319 goto error; 5320 } 5321 5322 /* add to satree */ 5323 newsav->refcnt = 1; 5324 newsav->state = SADB_SASTATE_MATURE; 5325 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_MATURE], newsav, 5326 secasvar, chain); 5327 5328 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5329 KEY_FREESAV(&sav); 5330 KEY_FREESAV(&sav); 5331 5332 { 5333 struct mbuf *n; 5334 5335 /* set msg buf from mhp */ 5336 n = key_getmsgbuf_x1(m, mhp); 5337 if (n == NULL) { 5338 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5339 return key_senderror(so, m, ENOBUFS); 5340 } 5341 5342 m_freem(m); 5343 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5344 } 5345 error: 5346 KEY_FREESAV(&sav); 5347 return key_senderror(so, m, error); 5348 } 5349 5350 /* 5351 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5352 * only called by key_api_update(). 5353 * OUT: 5354 * NULL : not found 5355 * others : found, pointer to a SA. 5356 */ 5357 #ifdef IPSEC_DOSEQCHECK 5358 static struct secasvar * 5359 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5360 { 5361 struct secasvar *sav; 5362 u_int state; 5363 5364 state = SADB_SASTATE_LARVAL; 5365 5366 /* search SAD with sequence number ? */ 5367 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5368 5369 KEY_CHKSASTATE(state, sav->state); 5370 5371 if (sav->seq == seq) { 5372 SA_ADDREF(sav); 5373 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5374 "DP cause refcnt++:%d SA:%p\n", 5375 sav->refcnt, sav); 5376 return sav; 5377 } 5378 } 5379 5380 return NULL; 5381 } 5382 #endif 5383 5384 /* 5385 * SADB_ADD processing 5386 * add an entry to SA database, when received 5387 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5388 * key(AE), (identity(SD),) (sensitivity)> 5389 * from the ikmpd, 5390 * and send 5391 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5392 * (identity(SD),) (sensitivity)> 5393 * to the ikmpd. 5394 * 5395 * IGNORE identity and sensitivity messages. 5396 * 5397 * m will always be freed. 5398 */ 5399 static int 5400 key_api_add(struct socket *so, struct mbuf *m, 5401 const struct sadb_msghdr *mhp) 5402 { 5403 struct sadb_sa *sa0; 5404 const struct sockaddr *src, *dst; 5405 struct secasindex saidx; 5406 struct secashead *newsah; 5407 struct secasvar *newsav; 5408 u_int16_t proto; 5409 u_int8_t mode; 5410 u_int16_t reqid; 5411 int error; 5412 5413 /* map satype to proto */ 5414 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5415 if (proto == 0) { 5416 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5417 return key_senderror(so, m, EINVAL); 5418 } 5419 5420 if (mhp->ext[SADB_EXT_SA] == NULL || 5421 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5422 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5423 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5424 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5425 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5426 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5427 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5428 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5429 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5430 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5431 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5432 return key_senderror(so, m, EINVAL); 5433 } 5434 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5435 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5436 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5437 /* XXX need more */ 5438 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5439 return key_senderror(so, m, EINVAL); 5440 } 5441 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5442 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5443 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5444 } else { 5445 mode = IPSEC_MODE_ANY; 5446 reqid = 0; 5447 } 5448 5449 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5450 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5451 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5452 5453 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5454 if (error != 0) 5455 return key_senderror(so, m, EINVAL); 5456 5457 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5458 if (error != 0) 5459 return key_senderror(so, m, EINVAL); 5460 5461 /* get a SA header */ 5462 newsah = key_getsah(&saidx, CMP_REQID); 5463 if (newsah == NULL) { 5464 /* create a new SA header */ 5465 newsah = key_newsah(&saidx); 5466 if (newsah == NULL) { 5467 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5468 return key_senderror(so, m, ENOBUFS); 5469 } 5470 } 5471 5472 /* set spidx if there */ 5473 /* XXX rewrite */ 5474 error = key_setident(newsah, m, mhp); 5475 if (error) { 5476 return key_senderror(so, m, error); 5477 } 5478 5479 { 5480 struct secasvar *sav; 5481 5482 /* We can create new SA only if SPI is differenct. */ 5483 sav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5484 if (sav != NULL) { 5485 KEY_FREESAV(&sav); 5486 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5487 return key_senderror(so, m, EEXIST); 5488 } 5489 } 5490 5491 /* create new SA entry. */ 5492 newsav = KEY_NEWSAV(m, mhp, &error); 5493 if (newsav == NULL) { 5494 return key_senderror(so, m, error); 5495 } 5496 newsav->sah = newsah; 5497 5498 error = key_handle_natt_info(newsav, mhp); 5499 if (error != 0) { 5500 key_delsav(newsav); 5501 return key_senderror(so, m, EINVAL); 5502 } 5503 5504 error = key_init_xform(newsav); 5505 if (error != 0) { 5506 key_delsav(newsav); 5507 return key_senderror(so, m, error); 5508 } 5509 5510 /* add to satree */ 5511 newsav->refcnt = 1; 5512 newsav->state = SADB_SASTATE_MATURE; 5513 LIST_INSERT_TAIL(&newsah->savtree[SADB_SASTATE_MATURE], newsav, 5514 secasvar, chain); 5515 5516 /* 5517 * don't call key_freesav() here, as we would like to keep the SA 5518 * in the database on success. 5519 */ 5520 5521 { 5522 struct mbuf *n; 5523 5524 /* set msg buf from mhp */ 5525 n = key_getmsgbuf_x1(m, mhp); 5526 if (n == NULL) { 5527 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5528 return key_senderror(so, m, ENOBUFS); 5529 } 5530 5531 m_freem(m); 5532 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5533 } 5534 } 5535 5536 /* m is retained */ 5537 static int 5538 key_setident(struct secashead *sah, struct mbuf *m, 5539 const struct sadb_msghdr *mhp) 5540 { 5541 const struct sadb_ident *idsrc, *iddst; 5542 int idsrclen, iddstlen; 5543 5544 KASSERT(!cpu_softintr_p()); 5545 KASSERT(sah != NULL); 5546 KASSERT(m != NULL); 5547 KASSERT(mhp != NULL); 5548 KASSERT(mhp->msg != NULL); 5549 5550 /* 5551 * Can be called with an existing sah from key_api_update(). 5552 */ 5553 if (sah->idents != NULL) { 5554 kmem_free(sah->idents, sah->idents_len); 5555 sah->idents = NULL; 5556 sah->idents_len = 0; 5557 } 5558 if (sah->identd != NULL) { 5559 kmem_free(sah->identd, sah->identd_len); 5560 sah->identd = NULL; 5561 sah->identd_len = 0; 5562 } 5563 5564 /* don't make buffer if not there */ 5565 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5566 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5567 sah->idents = NULL; 5568 sah->identd = NULL; 5569 return 0; 5570 } 5571 5572 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5573 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5574 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 5575 return EINVAL; 5576 } 5577 5578 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5579 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5580 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5581 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5582 5583 /* validity check */ 5584 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5585 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 5586 return EINVAL; 5587 } 5588 5589 switch (idsrc->sadb_ident_type) { 5590 case SADB_IDENTTYPE_PREFIX: 5591 case SADB_IDENTTYPE_FQDN: 5592 case SADB_IDENTTYPE_USERFQDN: 5593 default: 5594 /* XXX do nothing */ 5595 sah->idents = NULL; 5596 sah->identd = NULL; 5597 return 0; 5598 } 5599 5600 /* make structure */ 5601 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 5602 sah->idents_len = idsrclen; 5603 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 5604 sah->identd_len = iddstlen; 5605 memcpy(sah->idents, idsrc, idsrclen); 5606 memcpy(sah->identd, iddst, iddstlen); 5607 5608 return 0; 5609 } 5610 5611 /* 5612 * m will not be freed on return. 5613 * it is caller's responsibility to free the result. 5614 */ 5615 static struct mbuf * 5616 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5617 { 5618 struct mbuf *n; 5619 5620 KASSERT(m != NULL); 5621 KASSERT(mhp != NULL); 5622 KASSERT(mhp->msg != NULL); 5623 5624 /* create new sadb_msg to reply. */ 5625 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5626 SADB_EXT_SA, SADB_X_EXT_SA2, 5627 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5628 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5629 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5630 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5631 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5632 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5633 if (!n) 5634 return NULL; 5635 5636 if (n->m_len < sizeof(struct sadb_msg)) { 5637 n = m_pullup(n, sizeof(struct sadb_msg)); 5638 if (n == NULL) 5639 return NULL; 5640 } 5641 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5642 mtod(n, struct sadb_msg *)->sadb_msg_len = 5643 PFKEY_UNIT64(n->m_pkthdr.len); 5644 5645 return n; 5646 } 5647 5648 static int key_delete_all (struct socket *, struct mbuf *, 5649 const struct sadb_msghdr *, u_int16_t); 5650 5651 /* 5652 * SADB_DELETE processing 5653 * receive 5654 * <base, SA(*), address(SD)> 5655 * from the ikmpd, and set SADB_SASTATE_DEAD, 5656 * and send, 5657 * <base, SA(*), address(SD)> 5658 * to the ikmpd. 5659 * 5660 * m will always be freed. 5661 */ 5662 static int 5663 key_api_delete(struct socket *so, struct mbuf *m, 5664 const struct sadb_msghdr *mhp) 5665 { 5666 struct sadb_sa *sa0; 5667 const struct sockaddr *src, *dst; 5668 struct secasindex saidx; 5669 struct secashead *sah; 5670 struct secasvar *sav = NULL; 5671 u_int16_t proto; 5672 int error; 5673 5674 /* map satype to proto */ 5675 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5676 if (proto == 0) { 5677 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5678 return key_senderror(so, m, EINVAL); 5679 } 5680 5681 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5682 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5683 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5684 return key_senderror(so, m, EINVAL); 5685 } 5686 5687 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5688 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5689 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5690 return key_senderror(so, m, EINVAL); 5691 } 5692 5693 if (mhp->ext[SADB_EXT_SA] == NULL) { 5694 /* 5695 * Caller wants us to delete all non-LARVAL SAs 5696 * that match the src/dst. This is used during 5697 * IKE INITIAL-CONTACT. 5698 */ 5699 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 5700 return key_delete_all(so, m, mhp, proto); 5701 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5702 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5703 return key_senderror(so, m, EINVAL); 5704 } 5705 5706 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5707 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5708 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5709 5710 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5711 if (error != 0) 5712 return key_senderror(so, m, EINVAL); 5713 5714 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5715 if (error != 0) 5716 return key_senderror(so, m, EINVAL); 5717 5718 /* get a SA header */ 5719 sah = key_getsah(&saidx, CMP_HEAD); 5720 if (sah != NULL) { 5721 /* get a SA with SPI. */ 5722 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5723 } 5724 5725 if (sav == NULL) { 5726 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5727 return key_senderror(so, m, ENOENT); 5728 } 5729 5730 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5731 KEY_FREESAV(&sav); 5732 KEY_FREESAV(&sav); 5733 5734 { 5735 struct mbuf *n; 5736 5737 /* create new sadb_msg to reply. */ 5738 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5739 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5740 if (!n) 5741 return key_senderror(so, m, ENOBUFS); 5742 5743 n = key_fill_replymsg(n, 0); 5744 if (n == NULL) 5745 return key_senderror(so, m, ENOBUFS); 5746 5747 m_freem(m); 5748 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5749 } 5750 } 5751 5752 /* 5753 * delete all SAs for src/dst. Called from key_api_delete(). 5754 */ 5755 static int 5756 key_delete_all(struct socket *so, struct mbuf *m, 5757 const struct sadb_msghdr *mhp, u_int16_t proto) 5758 { 5759 const struct sockaddr *src, *dst; 5760 struct secasindex saidx; 5761 struct secashead *sah; 5762 struct secasvar *sav, *nextsav; 5763 u_int state; 5764 int error; 5765 5766 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5767 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5768 5769 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5770 if (error != 0) 5771 return key_senderror(so, m, EINVAL); 5772 5773 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5774 if (error != 0) 5775 return key_senderror(so, m, EINVAL); 5776 5777 sah = key_getsah(&saidx, CMP_HEAD); 5778 if (sah != NULL) { 5779 /* Delete all non-LARVAL SAs. */ 5780 SASTATE_ALIVE_FOREACH(state) { 5781 if (state == SADB_SASTATE_LARVAL) 5782 continue; 5783 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 5784 nextsav) { 5785 /* sanity check */ 5786 if (sav->state != state) { 5787 IPSECLOG(LOG_DEBUG, 5788 "invalid sav->state " 5789 "(queue: %d SA: %d)\n", 5790 state, sav->state); 5791 continue; 5792 } 5793 5794 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5795 KEY_FREESAV(&sav); 5796 } 5797 } 5798 } 5799 { 5800 struct mbuf *n; 5801 5802 /* create new sadb_msg to reply. */ 5803 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5804 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5805 if (!n) 5806 return key_senderror(so, m, ENOBUFS); 5807 5808 n = key_fill_replymsg(n, 0); 5809 if (n == NULL) 5810 return key_senderror(so, m, ENOBUFS); 5811 5812 m_freem(m); 5813 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5814 } 5815 } 5816 5817 /* 5818 * SADB_GET processing 5819 * receive 5820 * <base, SA(*), address(SD)> 5821 * from the ikmpd, and get a SP and a SA to respond, 5822 * and send, 5823 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5824 * (identity(SD),) (sensitivity)> 5825 * to the ikmpd. 5826 * 5827 * m will always be freed. 5828 */ 5829 static int 5830 key_api_get(struct socket *so, struct mbuf *m, 5831 const struct sadb_msghdr *mhp) 5832 { 5833 struct sadb_sa *sa0; 5834 const struct sockaddr *src, *dst; 5835 struct secasindex saidx; 5836 struct secashead *sah; 5837 struct secasvar *sav = NULL; 5838 u_int16_t proto; 5839 int error; 5840 5841 /* map satype to proto */ 5842 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5843 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5844 return key_senderror(so, m, EINVAL); 5845 } 5846 5847 if (mhp->ext[SADB_EXT_SA] == NULL || 5848 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5849 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5850 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5851 return key_senderror(so, m, EINVAL); 5852 } 5853 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5854 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5855 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5856 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5857 return key_senderror(so, m, EINVAL); 5858 } 5859 5860 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5861 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5862 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5863 5864 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5865 if (error != 0) 5866 return key_senderror(so, m, EINVAL); 5867 5868 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5869 if (error != 0) 5870 return key_senderror(so, m, EINVAL); 5871 5872 /* get a SA header */ 5873 sah = key_getsah(&saidx, CMP_HEAD); 5874 if (sah != NULL) { 5875 /* get a SA with SPI. */ 5876 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5877 } 5878 if (sav == NULL) { 5879 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5880 return key_senderror(so, m, ENOENT); 5881 } 5882 5883 { 5884 struct mbuf *n; 5885 u_int8_t satype; 5886 5887 /* map proto to satype */ 5888 satype = key_proto2satype(sah->saidx.proto); 5889 if (satype == 0) { 5890 KEY_FREESAV(&sav); 5891 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 5892 return key_senderror(so, m, EINVAL); 5893 } 5894 5895 /* create new sadb_msg to reply. */ 5896 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5897 mhp->msg->sadb_msg_pid); 5898 KEY_FREESAV(&sav); 5899 if (!n) 5900 return key_senderror(so, m, ENOBUFS); 5901 5902 m_freem(m); 5903 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5904 } 5905 } 5906 5907 /* XXX make it sysctl-configurable? */ 5908 static void 5909 key_getcomb_setlifetime(struct sadb_comb *comb) 5910 { 5911 5912 comb->sadb_comb_soft_allocations = 1; 5913 comb->sadb_comb_hard_allocations = 1; 5914 comb->sadb_comb_soft_bytes = 0; 5915 comb->sadb_comb_hard_bytes = 0; 5916 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5917 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5918 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5919 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5920 } 5921 5922 /* 5923 * XXX reorder combinations by preference 5924 * XXX no idea if the user wants ESP authentication or not 5925 */ 5926 static struct mbuf * 5927 key_getcomb_esp(void) 5928 { 5929 struct sadb_comb *comb; 5930 const struct enc_xform *algo; 5931 struct mbuf *result = NULL, *m, *n; 5932 int encmin; 5933 int i, off, o; 5934 int totlen; 5935 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5936 5937 m = NULL; 5938 for (i = 1; i <= SADB_EALG_MAX; i++) { 5939 algo = esp_algorithm_lookup(i); 5940 if (algo == NULL) 5941 continue; 5942 5943 /* discard algorithms with key size smaller than system min */ 5944 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5945 continue; 5946 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5947 encmin = ipsec_esp_keymin; 5948 else 5949 encmin = _BITS(algo->minkey); 5950 5951 if (ipsec_esp_auth) 5952 m = key_getcomb_ah(); 5953 else { 5954 KASSERTMSG(l <= MLEN, 5955 "l=%u > MLEN=%lu", l, (u_long) MLEN); 5956 MGET(m, M_DONTWAIT, MT_DATA); 5957 if (m) { 5958 M_ALIGN(m, l); 5959 m->m_len = l; 5960 m->m_next = NULL; 5961 memset(mtod(m, void *), 0, m->m_len); 5962 } 5963 } 5964 if (!m) 5965 goto fail; 5966 5967 totlen = 0; 5968 for (n = m; n; n = n->m_next) 5969 totlen += n->m_len; 5970 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 5971 5972 for (off = 0; off < totlen; off += l) { 5973 n = m_pulldown(m, off, l, &o); 5974 if (!n) { 5975 /* m is already freed */ 5976 goto fail; 5977 } 5978 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5979 memset(comb, 0, sizeof(*comb)); 5980 key_getcomb_setlifetime(comb); 5981 comb->sadb_comb_encrypt = i; 5982 comb->sadb_comb_encrypt_minbits = encmin; 5983 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5984 } 5985 5986 if (!result) 5987 result = m; 5988 else 5989 m_cat(result, m); 5990 } 5991 5992 return result; 5993 5994 fail: 5995 if (result) 5996 m_freem(result); 5997 return NULL; 5998 } 5999 6000 static void 6001 key_getsizes_ah(const struct auth_hash *ah, int alg, 6002 u_int16_t* ksmin, u_int16_t* ksmax) 6003 { 6004 *ksmin = *ksmax = ah->keysize; 6005 if (ah->keysize == 0) { 6006 /* 6007 * Transform takes arbitrary key size but algorithm 6008 * key size is restricted. Enforce this here. 6009 */ 6010 switch (alg) { 6011 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6012 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6013 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6014 default: 6015 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 6016 break; 6017 } 6018 } 6019 } 6020 6021 /* 6022 * XXX reorder combinations by preference 6023 */ 6024 static struct mbuf * 6025 key_getcomb_ah(void) 6026 { 6027 struct sadb_comb *comb; 6028 const struct auth_hash *algo; 6029 struct mbuf *m; 6030 u_int16_t minkeysize, maxkeysize; 6031 int i; 6032 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6033 6034 m = NULL; 6035 for (i = 1; i <= SADB_AALG_MAX; i++) { 6036 #if 1 6037 /* we prefer HMAC algorithms, not old algorithms */ 6038 if (i != SADB_AALG_SHA1HMAC && 6039 i != SADB_AALG_MD5HMAC && 6040 i != SADB_X_AALG_SHA2_256 && 6041 i != SADB_X_AALG_SHA2_384 && 6042 i != SADB_X_AALG_SHA2_512) 6043 continue; 6044 #endif 6045 algo = ah_algorithm_lookup(i); 6046 if (!algo) 6047 continue; 6048 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6049 /* discard algorithms with key size smaller than system min */ 6050 if (_BITS(minkeysize) < ipsec_ah_keymin) 6051 continue; 6052 6053 if (!m) { 6054 KASSERTMSG(l <= MLEN, 6055 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6056 MGET(m, M_DONTWAIT, MT_DATA); 6057 if (m) { 6058 M_ALIGN(m, l); 6059 m->m_len = l; 6060 m->m_next = NULL; 6061 } 6062 } else 6063 M_PREPEND(m, l, M_DONTWAIT); 6064 if (!m) 6065 return NULL; 6066 6067 if (m->m_len < sizeof(struct sadb_comb)) { 6068 m = m_pullup(m, sizeof(struct sadb_comb)); 6069 if (m == NULL) 6070 return NULL; 6071 } 6072 6073 comb = mtod(m, struct sadb_comb *); 6074 memset(comb, 0, sizeof(*comb)); 6075 key_getcomb_setlifetime(comb); 6076 comb->sadb_comb_auth = i; 6077 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6078 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6079 } 6080 6081 return m; 6082 } 6083 6084 /* 6085 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6086 * XXX reorder combinations by preference 6087 */ 6088 static struct mbuf * 6089 key_getcomb_ipcomp(void) 6090 { 6091 struct sadb_comb *comb; 6092 const struct comp_algo *algo; 6093 struct mbuf *m; 6094 int i; 6095 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6096 6097 m = NULL; 6098 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6099 algo = ipcomp_algorithm_lookup(i); 6100 if (!algo) 6101 continue; 6102 6103 if (!m) { 6104 KASSERTMSG(l <= MLEN, 6105 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6106 MGET(m, M_DONTWAIT, MT_DATA); 6107 if (m) { 6108 M_ALIGN(m, l); 6109 m->m_len = l; 6110 m->m_next = NULL; 6111 } 6112 } else 6113 M_PREPEND(m, l, M_DONTWAIT); 6114 if (!m) 6115 return NULL; 6116 6117 if (m->m_len < sizeof(struct sadb_comb)) { 6118 m = m_pullup(m, sizeof(struct sadb_comb)); 6119 if (m == NULL) 6120 return NULL; 6121 } 6122 6123 comb = mtod(m, struct sadb_comb *); 6124 memset(comb, 0, sizeof(*comb)); 6125 key_getcomb_setlifetime(comb); 6126 comb->sadb_comb_encrypt = i; 6127 /* what should we set into sadb_comb_*_{min,max}bits? */ 6128 } 6129 6130 return m; 6131 } 6132 6133 /* 6134 * XXX no way to pass mode (transport/tunnel) to userland 6135 * XXX replay checking? 6136 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6137 */ 6138 static struct mbuf * 6139 key_getprop(const struct secasindex *saidx) 6140 { 6141 struct sadb_prop *prop; 6142 struct mbuf *m, *n; 6143 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6144 int totlen; 6145 6146 switch (saidx->proto) { 6147 case IPPROTO_ESP: 6148 m = key_getcomb_esp(); 6149 break; 6150 case IPPROTO_AH: 6151 m = key_getcomb_ah(); 6152 break; 6153 case IPPROTO_IPCOMP: 6154 m = key_getcomb_ipcomp(); 6155 break; 6156 default: 6157 return NULL; 6158 } 6159 6160 if (!m) 6161 return NULL; 6162 M_PREPEND(m, l, M_DONTWAIT); 6163 if (!m) 6164 return NULL; 6165 6166 totlen = 0; 6167 for (n = m; n; n = n->m_next) 6168 totlen += n->m_len; 6169 6170 prop = mtod(m, struct sadb_prop *); 6171 memset(prop, 0, sizeof(*prop)); 6172 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6173 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6174 prop->sadb_prop_replay = 32; /* XXX */ 6175 6176 return m; 6177 } 6178 6179 /* 6180 * SADB_ACQUIRE processing called by key_checkrequest() and key_api_acquire(). 6181 * send 6182 * <base, SA, address(SD), (address(P)), x_policy, 6183 * (identity(SD),) (sensitivity,) proposal> 6184 * to KMD, and expect to receive 6185 * <base> with SADB_ACQUIRE if error occurred, 6186 * or 6187 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6188 * from KMD by PF_KEY. 6189 * 6190 * XXX x_policy is outside of RFC2367 (KAME extension). 6191 * XXX sensitivity is not supported. 6192 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6193 * see comment for key_getcomb_ipcomp(). 6194 * 6195 * OUT: 6196 * 0 : succeed 6197 * others: error number 6198 */ 6199 static int 6200 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6201 { 6202 struct mbuf *result = NULL, *m; 6203 #ifndef IPSEC_NONBLOCK_ACQUIRE 6204 struct secacq *newacq; 6205 #endif 6206 u_int8_t satype; 6207 int error = -1; 6208 u_int32_t seq; 6209 6210 /* sanity check */ 6211 KASSERT(saidx != NULL); 6212 satype = key_proto2satype(saidx->proto); 6213 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6214 6215 #ifndef IPSEC_NONBLOCK_ACQUIRE 6216 /* 6217 * We never do anything about acquirng SA. There is anather 6218 * solution that kernel blocks to send SADB_ACQUIRE message until 6219 * getting something message from IKEd. In later case, to be 6220 * managed with ACQUIRING list. 6221 */ 6222 /* Get an entry to check whether sending message or not. */ 6223 mutex_enter(&key_mtx); 6224 newacq = key_getacq(saidx); 6225 if (newacq != NULL) { 6226 if (key_blockacq_count < newacq->count) { 6227 /* reset counter and do send message. */ 6228 newacq->count = 0; 6229 } else { 6230 /* increment counter and do nothing. */ 6231 newacq->count++; 6232 mutex_exit(&key_mtx); 6233 return 0; 6234 } 6235 } else { 6236 /* make new entry for blocking to send SADB_ACQUIRE. */ 6237 newacq = key_newacq(saidx); 6238 if (newacq == NULL) 6239 return ENOBUFS; 6240 6241 /* add to acqtree */ 6242 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6243 } 6244 6245 seq = newacq->seq; 6246 mutex_exit(&key_mtx); 6247 #else 6248 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6249 #endif 6250 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6251 if (!m) { 6252 error = ENOBUFS; 6253 goto fail; 6254 } 6255 result = m; 6256 6257 /* set sadb_address for saidx's. */ 6258 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6259 IPSEC_ULPROTO_ANY); 6260 if (!m) { 6261 error = ENOBUFS; 6262 goto fail; 6263 } 6264 m_cat(result, m); 6265 6266 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6267 IPSEC_ULPROTO_ANY); 6268 if (!m) { 6269 error = ENOBUFS; 6270 goto fail; 6271 } 6272 m_cat(result, m); 6273 6274 /* XXX proxy address (optional) */ 6275 6276 /* set sadb_x_policy */ 6277 if (sp) { 6278 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6279 if (!m) { 6280 error = ENOBUFS; 6281 goto fail; 6282 } 6283 m_cat(result, m); 6284 } 6285 6286 /* XXX identity (optional) */ 6287 #if 0 6288 if (idexttype && fqdn) { 6289 /* create identity extension (FQDN) */ 6290 struct sadb_ident *id; 6291 int fqdnlen; 6292 6293 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6294 id = (struct sadb_ident *)p; 6295 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6296 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6297 id->sadb_ident_exttype = idexttype; 6298 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6299 memcpy(id + 1, fqdn, fqdnlen); 6300 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6301 } 6302 6303 if (idexttype) { 6304 /* create identity extension (USERFQDN) */ 6305 struct sadb_ident *id; 6306 int userfqdnlen; 6307 6308 if (userfqdn) { 6309 /* +1 for terminating-NUL */ 6310 userfqdnlen = strlen(userfqdn) + 1; 6311 } else 6312 userfqdnlen = 0; 6313 id = (struct sadb_ident *)p; 6314 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6315 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6316 id->sadb_ident_exttype = idexttype; 6317 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6318 /* XXX is it correct? */ 6319 if (curlwp) 6320 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6321 if (userfqdn && userfqdnlen) 6322 memcpy(id + 1, userfqdn, userfqdnlen); 6323 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6324 } 6325 #endif 6326 6327 /* XXX sensitivity (optional) */ 6328 6329 /* create proposal/combination extension */ 6330 m = key_getprop(saidx); 6331 #if 0 6332 /* 6333 * spec conformant: always attach proposal/combination extension, 6334 * the problem is that we have no way to attach it for ipcomp, 6335 * due to the way sadb_comb is declared in RFC2367. 6336 */ 6337 if (!m) { 6338 error = ENOBUFS; 6339 goto fail; 6340 } 6341 m_cat(result, m); 6342 #else 6343 /* 6344 * outside of spec; make proposal/combination extension optional. 6345 */ 6346 if (m) 6347 m_cat(result, m); 6348 #endif 6349 6350 if ((result->m_flags & M_PKTHDR) == 0) { 6351 error = EINVAL; 6352 goto fail; 6353 } 6354 6355 if (result->m_len < sizeof(struct sadb_msg)) { 6356 result = m_pullup(result, sizeof(struct sadb_msg)); 6357 if (result == NULL) { 6358 error = ENOBUFS; 6359 goto fail; 6360 } 6361 } 6362 6363 result->m_pkthdr.len = 0; 6364 for (m = result; m; m = m->m_next) 6365 result->m_pkthdr.len += m->m_len; 6366 6367 mtod(result, struct sadb_msg *)->sadb_msg_len = 6368 PFKEY_UNIT64(result->m_pkthdr.len); 6369 6370 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6371 6372 fail: 6373 if (result) 6374 m_freem(result); 6375 return error; 6376 } 6377 6378 #ifndef IPSEC_NONBLOCK_ACQUIRE 6379 static struct secacq * 6380 key_newacq(const struct secasindex *saidx) 6381 { 6382 struct secacq *newacq; 6383 6384 /* get new entry */ 6385 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6386 if (newacq == NULL) { 6387 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6388 return NULL; 6389 } 6390 6391 /* copy secindex */ 6392 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6393 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6394 newacq->created = time_uptime; 6395 newacq->count = 0; 6396 6397 return newacq; 6398 } 6399 6400 static struct secacq * 6401 key_getacq(const struct secasindex *saidx) 6402 { 6403 struct secacq *acq; 6404 6405 KASSERT(mutex_owned(&key_mtx)); 6406 6407 LIST_FOREACH(acq, &acqtree, chain) { 6408 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6409 return acq; 6410 } 6411 6412 return NULL; 6413 } 6414 6415 static struct secacq * 6416 key_getacqbyseq(u_int32_t seq) 6417 { 6418 struct secacq *acq; 6419 6420 KASSERT(mutex_owned(&key_mtx)); 6421 6422 LIST_FOREACH(acq, &acqtree, chain) { 6423 if (acq->seq == seq) 6424 return acq; 6425 } 6426 6427 return NULL; 6428 } 6429 #endif 6430 6431 #ifdef notyet 6432 static struct secspacq * 6433 key_newspacq(const struct secpolicyindex *spidx) 6434 { 6435 struct secspacq *acq; 6436 6437 /* get new entry */ 6438 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6439 if (acq == NULL) { 6440 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6441 return NULL; 6442 } 6443 6444 /* copy secindex */ 6445 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6446 acq->created = time_uptime; 6447 acq->count = 0; 6448 6449 return acq; 6450 } 6451 6452 static struct secspacq * 6453 key_getspacq(const struct secpolicyindex *spidx) 6454 { 6455 struct secspacq *acq; 6456 6457 LIST_FOREACH(acq, &spacqtree, chain) { 6458 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6459 return acq; 6460 } 6461 6462 return NULL; 6463 } 6464 #endif /* notyet */ 6465 6466 /* 6467 * SADB_ACQUIRE processing, 6468 * in first situation, is receiving 6469 * <base> 6470 * from the ikmpd, and clear sequence of its secasvar entry. 6471 * 6472 * In second situation, is receiving 6473 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6474 * from a user land process, and return 6475 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6476 * to the socket. 6477 * 6478 * m will always be freed. 6479 */ 6480 static int 6481 key_api_acquire(struct socket *so, struct mbuf *m, 6482 const struct sadb_msghdr *mhp) 6483 { 6484 const struct sockaddr *src, *dst; 6485 struct secasindex saidx; 6486 struct secashead *sah; 6487 u_int16_t proto; 6488 int error; 6489 6490 /* 6491 * Error message from KMd. 6492 * We assume that if error was occurred in IKEd, the length of PFKEY 6493 * message is equal to the size of sadb_msg structure. 6494 * We do not raise error even if error occurred in this function. 6495 */ 6496 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6497 #ifndef IPSEC_NONBLOCK_ACQUIRE 6498 struct secacq *acq; 6499 6500 /* check sequence number */ 6501 if (mhp->msg->sadb_msg_seq == 0) { 6502 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 6503 m_freem(m); 6504 return 0; 6505 } 6506 6507 mutex_enter(&key_mtx); 6508 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 6509 if (acq == NULL) { 6510 mutex_exit(&key_mtx); 6511 /* 6512 * the specified larval SA is already gone, or we got 6513 * a bogus sequence number. we can silently ignore it. 6514 */ 6515 m_freem(m); 6516 return 0; 6517 } 6518 6519 /* reset acq counter in order to deletion by timehander. */ 6520 acq->created = time_uptime; 6521 acq->count = 0; 6522 mutex_exit(&key_mtx); 6523 #endif 6524 m_freem(m); 6525 return 0; 6526 } 6527 6528 /* 6529 * This message is from user land. 6530 */ 6531 6532 /* map satype to proto */ 6533 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6534 if (proto == 0) { 6535 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6536 return key_senderror(so, m, EINVAL); 6537 } 6538 6539 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6540 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6541 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6542 /* error */ 6543 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6544 return key_senderror(so, m, EINVAL); 6545 } 6546 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6547 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6548 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6549 /* error */ 6550 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6551 return key_senderror(so, m, EINVAL); 6552 } 6553 6554 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6555 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6556 6557 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6558 if (error != 0) 6559 return key_senderror(so, m, EINVAL); 6560 6561 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6562 if (error != 0) 6563 return key_senderror(so, m, EINVAL); 6564 6565 /* get a SA index */ 6566 sah = key_getsah(&saidx, CMP_MODE_REQID); 6567 if (sah != NULL) { 6568 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 6569 return key_senderror(so, m, EEXIST); 6570 } 6571 6572 error = key_acquire(&saidx, NULL); 6573 if (error != 0) { 6574 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 6575 error); 6576 return key_senderror(so, m, error); 6577 } 6578 6579 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6580 } 6581 6582 /* 6583 * SADB_REGISTER processing. 6584 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6585 * receive 6586 * <base> 6587 * from the ikmpd, and register a socket to send PF_KEY messages, 6588 * and send 6589 * <base, supported> 6590 * to KMD by PF_KEY. 6591 * If socket is detached, must free from regnode. 6592 * 6593 * m will always be freed. 6594 */ 6595 static int 6596 key_api_register(struct socket *so, struct mbuf *m, 6597 const struct sadb_msghdr *mhp) 6598 { 6599 struct secreg *reg, *newreg = 0; 6600 6601 /* check for invalid register message */ 6602 if (mhp->msg->sadb_msg_satype >= __arraycount(regtree)) 6603 return key_senderror(so, m, EINVAL); 6604 6605 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6606 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6607 goto setmsg; 6608 6609 /* Allocate regnode in advance, out of mutex */ 6610 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 6611 6612 /* check whether existing or not */ 6613 mutex_enter(&key_mtx); 6614 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6615 if (reg->so == so) { 6616 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 6617 mutex_exit(&key_mtx); 6618 kmem_free(newreg, sizeof(*newreg)); 6619 return key_senderror(so, m, EEXIST); 6620 } 6621 } 6622 6623 newreg->so = so; 6624 ((struct keycb *)sotorawcb(so))->kp_registered++; 6625 6626 /* add regnode to regtree. */ 6627 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6628 mutex_exit(&key_mtx); 6629 6630 setmsg: 6631 { 6632 struct mbuf *n; 6633 struct sadb_supported *sup; 6634 u_int len, alen, elen; 6635 int off; 6636 int i; 6637 struct sadb_alg *alg; 6638 6639 /* create new sadb_msg to reply. */ 6640 alen = 0; 6641 for (i = 1; i <= SADB_AALG_MAX; i++) { 6642 if (ah_algorithm_lookup(i)) 6643 alen += sizeof(struct sadb_alg); 6644 } 6645 if (alen) 6646 alen += sizeof(struct sadb_supported); 6647 elen = 0; 6648 for (i = 1; i <= SADB_EALG_MAX; i++) { 6649 if (esp_algorithm_lookup(i)) 6650 elen += sizeof(struct sadb_alg); 6651 } 6652 if (elen) 6653 elen += sizeof(struct sadb_supported); 6654 6655 len = sizeof(struct sadb_msg) + alen + elen; 6656 6657 if (len > MCLBYTES) 6658 return key_senderror(so, m, ENOBUFS); 6659 6660 MGETHDR(n, M_DONTWAIT, MT_DATA); 6661 if (len > MHLEN) { 6662 MCLGET(n, M_DONTWAIT); 6663 if ((n->m_flags & M_EXT) == 0) { 6664 m_freem(n); 6665 n = NULL; 6666 } 6667 } 6668 if (!n) 6669 return key_senderror(so, m, ENOBUFS); 6670 6671 n->m_pkthdr.len = n->m_len = len; 6672 n->m_next = NULL; 6673 off = 0; 6674 6675 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6676 n = key_fill_replymsg(n, 0); 6677 if (n == NULL) 6678 return key_senderror(so, m, ENOBUFS); 6679 6680 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6681 6682 /* for authentication algorithm */ 6683 if (alen) { 6684 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6685 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6686 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6687 off += PFKEY_ALIGN8(sizeof(*sup)); 6688 6689 for (i = 1; i <= SADB_AALG_MAX; i++) { 6690 const struct auth_hash *aalgo; 6691 u_int16_t minkeysize, maxkeysize; 6692 6693 aalgo = ah_algorithm_lookup(i); 6694 if (!aalgo) 6695 continue; 6696 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6697 alg->sadb_alg_id = i; 6698 alg->sadb_alg_ivlen = 0; 6699 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6700 alg->sadb_alg_minbits = _BITS(minkeysize); 6701 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6702 off += PFKEY_ALIGN8(sizeof(*alg)); 6703 } 6704 } 6705 6706 /* for encryption algorithm */ 6707 if (elen) { 6708 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6709 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6710 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6711 off += PFKEY_ALIGN8(sizeof(*sup)); 6712 6713 for (i = 1; i <= SADB_EALG_MAX; i++) { 6714 const struct enc_xform *ealgo; 6715 6716 ealgo = esp_algorithm_lookup(i); 6717 if (!ealgo) 6718 continue; 6719 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6720 alg->sadb_alg_id = i; 6721 alg->sadb_alg_ivlen = ealgo->blocksize; 6722 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6723 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6724 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6725 } 6726 } 6727 6728 KASSERTMSG(off == len, "length inconsistency"); 6729 6730 m_freem(m); 6731 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6732 } 6733 } 6734 6735 /* 6736 * free secreg entry registered. 6737 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6738 */ 6739 void 6740 key_freereg(struct socket *so) 6741 { 6742 struct secreg *reg; 6743 int i; 6744 6745 KASSERT(!cpu_softintr_p()); 6746 KASSERT(so != NULL); 6747 6748 /* 6749 * check whether existing or not. 6750 * check all type of SA, because there is a potential that 6751 * one socket is registered to multiple type of SA. 6752 */ 6753 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6754 mutex_enter(&key_mtx); 6755 LIST_FOREACH(reg, ®tree[i], chain) { 6756 if (reg->so == so) { 6757 LIST_REMOVE(reg, chain); 6758 break; 6759 } 6760 } 6761 mutex_exit(&key_mtx); 6762 if (reg != NULL) 6763 kmem_free(reg, sizeof(*reg)); 6764 } 6765 6766 return; 6767 } 6768 6769 /* 6770 * SADB_EXPIRE processing 6771 * send 6772 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6773 * to KMD by PF_KEY. 6774 * NOTE: We send only soft lifetime extension. 6775 * 6776 * OUT: 0 : succeed 6777 * others : error number 6778 */ 6779 static int 6780 key_expire(struct secasvar *sav) 6781 { 6782 int s; 6783 int satype; 6784 struct mbuf *result = NULL, *m; 6785 int len; 6786 int error = -1; 6787 struct sadb_lifetime *lt; 6788 6789 /* XXX: Why do we lock ? */ 6790 s = splsoftnet(); /*called from softclock()*/ 6791 6792 KASSERT(sav != NULL); 6793 KASSERT(sav->sah != NULL); 6794 6795 satype = key_proto2satype(sav->sah->saidx.proto); 6796 KASSERTMSG(satype != 0, "invalid proto is passed"); 6797 6798 /* set msg header */ 6799 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6800 if (!m) { 6801 error = ENOBUFS; 6802 goto fail; 6803 } 6804 result = m; 6805 6806 /* create SA extension */ 6807 m = key_setsadbsa(sav); 6808 if (!m) { 6809 error = ENOBUFS; 6810 goto fail; 6811 } 6812 m_cat(result, m); 6813 6814 /* create SA extension */ 6815 m = key_setsadbxsa2(sav->sah->saidx.mode, 6816 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 6817 if (!m) { 6818 error = ENOBUFS; 6819 goto fail; 6820 } 6821 m_cat(result, m); 6822 6823 /* create lifetime extension (current and soft) */ 6824 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6825 m = key_alloc_mbuf(len); 6826 if (!m || m->m_next) { /*XXX*/ 6827 if (m) 6828 m_freem(m); 6829 error = ENOBUFS; 6830 goto fail; 6831 } 6832 memset(mtod(m, void *), 0, len); 6833 lt = mtod(m, struct sadb_lifetime *); 6834 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6835 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6836 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6837 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6838 lt->sadb_lifetime_addtime = 6839 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 6840 lt->sadb_lifetime_usetime = 6841 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 6842 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6843 memcpy(lt, sav->lft_s, sizeof(*lt)); 6844 m_cat(result, m); 6845 6846 /* set sadb_address for source */ 6847 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 6848 FULLMASK, IPSEC_ULPROTO_ANY); 6849 if (!m) { 6850 error = ENOBUFS; 6851 goto fail; 6852 } 6853 m_cat(result, m); 6854 6855 /* set sadb_address for destination */ 6856 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 6857 FULLMASK, IPSEC_ULPROTO_ANY); 6858 if (!m) { 6859 error = ENOBUFS; 6860 goto fail; 6861 } 6862 m_cat(result, m); 6863 6864 if ((result->m_flags & M_PKTHDR) == 0) { 6865 error = EINVAL; 6866 goto fail; 6867 } 6868 6869 if (result->m_len < sizeof(struct sadb_msg)) { 6870 result = m_pullup(result, sizeof(struct sadb_msg)); 6871 if (result == NULL) { 6872 error = ENOBUFS; 6873 goto fail; 6874 } 6875 } 6876 6877 result->m_pkthdr.len = 0; 6878 for (m = result; m; m = m->m_next) 6879 result->m_pkthdr.len += m->m_len; 6880 6881 mtod(result, struct sadb_msg *)->sadb_msg_len = 6882 PFKEY_UNIT64(result->m_pkthdr.len); 6883 6884 splx(s); 6885 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6886 6887 fail: 6888 if (result) 6889 m_freem(result); 6890 splx(s); 6891 return error; 6892 } 6893 6894 /* 6895 * SADB_FLUSH processing 6896 * receive 6897 * <base> 6898 * from the ikmpd, and free all entries in secastree. 6899 * and send, 6900 * <base> 6901 * to the ikmpd. 6902 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6903 * 6904 * m will always be freed. 6905 */ 6906 static int 6907 key_api_flush(struct socket *so, struct mbuf *m, 6908 const struct sadb_msghdr *mhp) 6909 { 6910 struct sadb_msg *newmsg; 6911 struct secashead *sah; 6912 struct secasvar *sav, *nextsav; 6913 u_int16_t proto; 6914 u_int8_t state; 6915 6916 /* map satype to proto */ 6917 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6918 if (proto == 0) { 6919 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6920 return key_senderror(so, m, EINVAL); 6921 } 6922 6923 /* no SATYPE specified, i.e. flushing all SA. */ 6924 LIST_FOREACH(sah, &sahtree, chain) { 6925 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 6926 proto != sah->saidx.proto) 6927 continue; 6928 6929 SASTATE_ALIVE_FOREACH(state) { 6930 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 6931 nextsav) { 6932 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6933 KEY_FREESAV(&sav); 6934 } 6935 } 6936 6937 sah->state = SADB_SASTATE_DEAD; 6938 } 6939 6940 if (m->m_len < sizeof(struct sadb_msg) || 6941 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6942 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6943 return key_senderror(so, m, ENOBUFS); 6944 } 6945 6946 if (m->m_next) 6947 m_freem(m->m_next); 6948 m->m_next = NULL; 6949 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6950 newmsg = mtod(m, struct sadb_msg *); 6951 newmsg->sadb_msg_errno = 0; 6952 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6953 6954 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6955 } 6956 6957 6958 static struct mbuf * 6959 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6960 { 6961 struct secashead *sah; 6962 struct secasvar *sav; 6963 u_int16_t proto; 6964 u_int8_t satype; 6965 u_int8_t state; 6966 int cnt; 6967 struct mbuf *m, *n, *prev; 6968 6969 *lenp = 0; 6970 6971 /* map satype to proto */ 6972 proto = key_satype2proto(req_satype); 6973 if (proto == 0) { 6974 *errorp = EINVAL; 6975 return (NULL); 6976 } 6977 6978 /* count sav entries to be sent to userland. */ 6979 cnt = 0; 6980 LIST_FOREACH(sah, &sahtree, chain) { 6981 if (req_satype != SADB_SATYPE_UNSPEC && 6982 proto != sah->saidx.proto) 6983 continue; 6984 6985 SASTATE_ANY_FOREACH(state) { 6986 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6987 cnt++; 6988 } 6989 } 6990 } 6991 6992 if (cnt == 0) { 6993 *errorp = ENOENT; 6994 return (NULL); 6995 } 6996 6997 /* send this to the userland, one at a time. */ 6998 m = NULL; 6999 prev = m; 7000 LIST_FOREACH(sah, &sahtree, chain) { 7001 if (req_satype != SADB_SATYPE_UNSPEC && 7002 proto != sah->saidx.proto) 7003 continue; 7004 7005 /* map proto to satype */ 7006 satype = key_proto2satype(sah->saidx.proto); 7007 if (satype == 0) { 7008 m_freem(m); 7009 *errorp = EINVAL; 7010 return (NULL); 7011 } 7012 7013 SASTATE_ANY_FOREACH(state) { 7014 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7015 n = key_setdumpsa(sav, SADB_DUMP, satype, 7016 --cnt, pid); 7017 if (!n) { 7018 m_freem(m); 7019 *errorp = ENOBUFS; 7020 return (NULL); 7021 } 7022 7023 if (!m) 7024 m = n; 7025 else 7026 prev->m_nextpkt = n; 7027 prev = n; 7028 } 7029 } 7030 } 7031 7032 if (!m) { 7033 *errorp = EINVAL; 7034 return (NULL); 7035 } 7036 7037 if ((m->m_flags & M_PKTHDR) != 0) { 7038 m->m_pkthdr.len = 0; 7039 for (n = m; n; n = n->m_next) 7040 m->m_pkthdr.len += n->m_len; 7041 } 7042 7043 *errorp = 0; 7044 return (m); 7045 } 7046 7047 /* 7048 * SADB_DUMP processing 7049 * dump all entries including status of DEAD in SAD. 7050 * receive 7051 * <base> 7052 * from the ikmpd, and dump all secasvar leaves 7053 * and send, 7054 * <base> ..... 7055 * to the ikmpd. 7056 * 7057 * m will always be freed. 7058 */ 7059 static int 7060 key_api_dump(struct socket *so, struct mbuf *m0, 7061 const struct sadb_msghdr *mhp) 7062 { 7063 u_int16_t proto; 7064 u_int8_t satype; 7065 struct mbuf *n; 7066 int s; 7067 int error, len, ok; 7068 7069 /* map satype to proto */ 7070 satype = mhp->msg->sadb_msg_satype; 7071 proto = key_satype2proto(satype); 7072 if (proto == 0) { 7073 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7074 return key_senderror(so, m0, EINVAL); 7075 } 7076 7077 /* 7078 * If the requestor has insufficient socket-buffer space 7079 * for the entire chain, nobody gets any response to the DUMP. 7080 * XXX For now, only the requestor ever gets anything. 7081 * Moreover, if the requestor has any space at all, they receive 7082 * the entire chain, otherwise the request is refused with ENOBUFS. 7083 */ 7084 if (sbspace(&so->so_rcv) <= 0) { 7085 return key_senderror(so, m0, ENOBUFS); 7086 } 7087 7088 s = splsoftnet(); 7089 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7090 splx(s); 7091 7092 if (n == NULL) { 7093 return key_senderror(so, m0, ENOENT); 7094 } 7095 { 7096 uint64_t *ps = PFKEY_STAT_GETREF(); 7097 ps[PFKEY_STAT_IN_TOTAL]++; 7098 ps[PFKEY_STAT_IN_BYTES] += len; 7099 PFKEY_STAT_PUTREF(); 7100 } 7101 7102 /* 7103 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7104 * The requestor receives either the entire chain, or an 7105 * error message with ENOBUFS. 7106 * 7107 * sbappendaddrchain() takes the chain of entries, one 7108 * packet-record per SPD entry, prepends the key_src sockaddr 7109 * to each packet-record, links the sockaddr mbufs into a new 7110 * list of records, then appends the entire resulting 7111 * list to the requesting socket. 7112 */ 7113 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7114 SB_PRIO_ONESHOT_OVERFLOW); 7115 7116 if (!ok) { 7117 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7118 m_freem(n); 7119 return key_senderror(so, m0, ENOBUFS); 7120 } 7121 7122 m_freem(m0); 7123 return 0; 7124 } 7125 7126 /* 7127 * SADB_X_PROMISC processing 7128 * 7129 * m will always be freed. 7130 */ 7131 static int 7132 key_api_promisc(struct socket *so, struct mbuf *m, 7133 const struct sadb_msghdr *mhp) 7134 { 7135 int olen; 7136 7137 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7138 7139 if (olen < sizeof(struct sadb_msg)) { 7140 #if 1 7141 return key_senderror(so, m, EINVAL); 7142 #else 7143 m_freem(m); 7144 return 0; 7145 #endif 7146 } else if (olen == sizeof(struct sadb_msg)) { 7147 /* enable/disable promisc mode */ 7148 struct keycb *kp = (struct keycb *)sotorawcb(so); 7149 if (kp == NULL) 7150 return key_senderror(so, m, EINVAL); 7151 mhp->msg->sadb_msg_errno = 0; 7152 switch (mhp->msg->sadb_msg_satype) { 7153 case 0: 7154 case 1: 7155 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7156 break; 7157 default: 7158 return key_senderror(so, m, EINVAL); 7159 } 7160 7161 /* send the original message back to everyone */ 7162 mhp->msg->sadb_msg_errno = 0; 7163 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7164 } else { 7165 /* send packet as is */ 7166 7167 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7168 7169 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7170 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7171 } 7172 } 7173 7174 static int (*key_api_typesw[]) (struct socket *, struct mbuf *, 7175 const struct sadb_msghdr *) = { 7176 NULL, /* SADB_RESERVED */ 7177 key_api_getspi, /* SADB_GETSPI */ 7178 key_api_update, /* SADB_UPDATE */ 7179 key_api_add, /* SADB_ADD */ 7180 key_api_delete, /* SADB_DELETE */ 7181 key_api_get, /* SADB_GET */ 7182 key_api_acquire, /* SADB_ACQUIRE */ 7183 key_api_register, /* SADB_REGISTER */ 7184 NULL, /* SADB_EXPIRE */ 7185 key_api_flush, /* SADB_FLUSH */ 7186 key_api_dump, /* SADB_DUMP */ 7187 key_api_promisc, /* SADB_X_PROMISC */ 7188 NULL, /* SADB_X_PCHANGE */ 7189 key_api_spdadd, /* SADB_X_SPDUPDATE */ 7190 key_api_spdadd, /* SADB_X_SPDADD */ 7191 key_api_spddelete, /* SADB_X_SPDDELETE */ 7192 key_api_spdget, /* SADB_X_SPDGET */ 7193 NULL, /* SADB_X_SPDACQUIRE */ 7194 key_api_spddump, /* SADB_X_SPDDUMP */ 7195 key_api_spdflush, /* SADB_X_SPDFLUSH */ 7196 key_api_spdadd, /* SADB_X_SPDSETIDX */ 7197 NULL, /* SADB_X_SPDEXPIRE */ 7198 key_api_spddelete2, /* SADB_X_SPDDELETE2 */ 7199 key_api_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7200 }; 7201 7202 /* 7203 * parse sadb_msg buffer to process PFKEYv2, 7204 * and create a data to response if needed. 7205 * I think to be dealed with mbuf directly. 7206 * IN: 7207 * msgp : pointer to pointer to a received buffer pulluped. 7208 * This is rewrited to response. 7209 * so : pointer to socket. 7210 * OUT: 7211 * length for buffer to send to user process. 7212 */ 7213 int 7214 key_parse(struct mbuf *m, struct socket *so) 7215 { 7216 struct sadb_msg *msg; 7217 struct sadb_msghdr mh; 7218 u_int orglen; 7219 int error; 7220 7221 KASSERT(m != NULL); 7222 KASSERT(so != NULL); 7223 7224 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7225 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7226 IPSECLOG(LOG_DEBUG, "passed sadb_msg\n"); 7227 kdebug_sadb(msg); 7228 } 7229 #endif 7230 7231 if (m->m_len < sizeof(struct sadb_msg)) { 7232 m = m_pullup(m, sizeof(struct sadb_msg)); 7233 if (!m) 7234 return ENOBUFS; 7235 } 7236 msg = mtod(m, struct sadb_msg *); 7237 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7238 7239 if ((m->m_flags & M_PKTHDR) == 0 || 7240 m->m_pkthdr.len != orglen) { 7241 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7242 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7243 error = EINVAL; 7244 goto senderror; 7245 } 7246 7247 if (msg->sadb_msg_version != PF_KEY_V2) { 7248 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7249 msg->sadb_msg_version); 7250 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7251 error = EINVAL; 7252 goto senderror; 7253 } 7254 7255 if (msg->sadb_msg_type > SADB_MAX) { 7256 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7257 msg->sadb_msg_type); 7258 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7259 error = EINVAL; 7260 goto senderror; 7261 } 7262 7263 /* for old-fashioned code - should be nuked */ 7264 if (m->m_pkthdr.len > MCLBYTES) { 7265 m_freem(m); 7266 return ENOBUFS; 7267 } 7268 if (m->m_next) { 7269 struct mbuf *n; 7270 7271 MGETHDR(n, M_DONTWAIT, MT_DATA); 7272 if (n && m->m_pkthdr.len > MHLEN) { 7273 MCLGET(n, M_DONTWAIT); 7274 if ((n->m_flags & M_EXT) == 0) { 7275 m_free(n); 7276 n = NULL; 7277 } 7278 } 7279 if (!n) { 7280 m_freem(m); 7281 return ENOBUFS; 7282 } 7283 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7284 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7285 n->m_next = NULL; 7286 m_freem(m); 7287 m = n; 7288 } 7289 7290 /* align the mbuf chain so that extensions are in contiguous region. */ 7291 error = key_align(m, &mh); 7292 if (error) 7293 return error; 7294 7295 if (m->m_next) { /*XXX*/ 7296 m_freem(m); 7297 return ENOBUFS; 7298 } 7299 7300 msg = mh.msg; 7301 7302 /* check SA type */ 7303 switch (msg->sadb_msg_satype) { 7304 case SADB_SATYPE_UNSPEC: 7305 switch (msg->sadb_msg_type) { 7306 case SADB_GETSPI: 7307 case SADB_UPDATE: 7308 case SADB_ADD: 7309 case SADB_DELETE: 7310 case SADB_GET: 7311 case SADB_ACQUIRE: 7312 case SADB_EXPIRE: 7313 IPSECLOG(LOG_DEBUG, 7314 "must specify satype when msg type=%u.\n", 7315 msg->sadb_msg_type); 7316 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7317 error = EINVAL; 7318 goto senderror; 7319 } 7320 break; 7321 case SADB_SATYPE_AH: 7322 case SADB_SATYPE_ESP: 7323 case SADB_X_SATYPE_IPCOMP: 7324 case SADB_X_SATYPE_TCPSIGNATURE: 7325 switch (msg->sadb_msg_type) { 7326 case SADB_X_SPDADD: 7327 case SADB_X_SPDDELETE: 7328 case SADB_X_SPDGET: 7329 case SADB_X_SPDDUMP: 7330 case SADB_X_SPDFLUSH: 7331 case SADB_X_SPDSETIDX: 7332 case SADB_X_SPDUPDATE: 7333 case SADB_X_SPDDELETE2: 7334 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7335 msg->sadb_msg_type); 7336 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7337 error = EINVAL; 7338 goto senderror; 7339 } 7340 break; 7341 case SADB_SATYPE_RSVP: 7342 case SADB_SATYPE_OSPFV2: 7343 case SADB_SATYPE_RIPV2: 7344 case SADB_SATYPE_MIP: 7345 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7346 msg->sadb_msg_satype); 7347 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7348 error = EOPNOTSUPP; 7349 goto senderror; 7350 case 1: /* XXX: What does it do? */ 7351 if (msg->sadb_msg_type == SADB_X_PROMISC) 7352 break; 7353 /*FALLTHROUGH*/ 7354 default: 7355 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7356 msg->sadb_msg_satype); 7357 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7358 error = EINVAL; 7359 goto senderror; 7360 } 7361 7362 /* check field of upper layer protocol and address family */ 7363 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7364 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7365 struct sadb_address *src0, *dst0; 7366 u_int plen; 7367 7368 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7369 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7370 7371 /* check upper layer protocol */ 7372 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7373 IPSECLOG(LOG_DEBUG, "upper layer protocol mismatched.\n"); 7374 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7375 error = EINVAL; 7376 goto senderror; 7377 } 7378 7379 /* check family */ 7380 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7381 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7382 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7383 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7384 error = EINVAL; 7385 goto senderror; 7386 } 7387 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7388 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7389 IPSECLOG(LOG_DEBUG, 7390 "address struct size mismatched.\n"); 7391 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7392 error = EINVAL; 7393 goto senderror; 7394 } 7395 7396 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7397 case AF_INET: 7398 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7399 sizeof(struct sockaddr_in)) { 7400 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7401 error = EINVAL; 7402 goto senderror; 7403 } 7404 break; 7405 case AF_INET6: 7406 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7407 sizeof(struct sockaddr_in6)) { 7408 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7409 error = EINVAL; 7410 goto senderror; 7411 } 7412 break; 7413 default: 7414 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7415 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7416 error = EAFNOSUPPORT; 7417 goto senderror; 7418 } 7419 7420 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7421 case AF_INET: 7422 plen = sizeof(struct in_addr) << 3; 7423 break; 7424 case AF_INET6: 7425 plen = sizeof(struct in6_addr) << 3; 7426 break; 7427 default: 7428 plen = 0; /*fool gcc*/ 7429 break; 7430 } 7431 7432 /* check max prefix length */ 7433 if (src0->sadb_address_prefixlen > plen || 7434 dst0->sadb_address_prefixlen > plen) { 7435 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7436 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7437 error = EINVAL; 7438 goto senderror; 7439 } 7440 7441 /* 7442 * prefixlen == 0 is valid because there can be a case when 7443 * all addresses are matched. 7444 */ 7445 } 7446 7447 if (msg->sadb_msg_type >= __arraycount(key_api_typesw) || 7448 key_api_typesw[msg->sadb_msg_type] == NULL) { 7449 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7450 error = EINVAL; 7451 goto senderror; 7452 } 7453 7454 return (*key_api_typesw[msg->sadb_msg_type])(so, m, &mh); 7455 7456 senderror: 7457 return key_senderror(so, m, error); 7458 } 7459 7460 static int 7461 key_senderror(struct socket *so, struct mbuf *m, int code) 7462 { 7463 struct sadb_msg *msg; 7464 7465 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7466 7467 msg = mtod(m, struct sadb_msg *); 7468 msg->sadb_msg_errno = code; 7469 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7470 } 7471 7472 /* 7473 * set the pointer to each header into message buffer. 7474 * m will be freed on error. 7475 * XXX larger-than-MCLBYTES extension? 7476 */ 7477 static int 7478 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7479 { 7480 struct mbuf *n; 7481 struct sadb_ext *ext; 7482 size_t off, end; 7483 int extlen; 7484 int toff; 7485 7486 KASSERT(m != NULL); 7487 KASSERT(mhp != NULL); 7488 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7489 7490 /* initialize */ 7491 memset(mhp, 0, sizeof(*mhp)); 7492 7493 mhp->msg = mtod(m, struct sadb_msg *); 7494 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7495 7496 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7497 extlen = end; /*just in case extlen is not updated*/ 7498 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7499 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7500 if (!n) { 7501 /* m is already freed */ 7502 return ENOBUFS; 7503 } 7504 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7505 7506 /* set pointer */ 7507 switch (ext->sadb_ext_type) { 7508 case SADB_EXT_SA: 7509 case SADB_EXT_ADDRESS_SRC: 7510 case SADB_EXT_ADDRESS_DST: 7511 case SADB_EXT_ADDRESS_PROXY: 7512 case SADB_EXT_LIFETIME_CURRENT: 7513 case SADB_EXT_LIFETIME_HARD: 7514 case SADB_EXT_LIFETIME_SOFT: 7515 case SADB_EXT_KEY_AUTH: 7516 case SADB_EXT_KEY_ENCRYPT: 7517 case SADB_EXT_IDENTITY_SRC: 7518 case SADB_EXT_IDENTITY_DST: 7519 case SADB_EXT_SENSITIVITY: 7520 case SADB_EXT_PROPOSAL: 7521 case SADB_EXT_SUPPORTED_AUTH: 7522 case SADB_EXT_SUPPORTED_ENCRYPT: 7523 case SADB_EXT_SPIRANGE: 7524 case SADB_X_EXT_POLICY: 7525 case SADB_X_EXT_SA2: 7526 case SADB_X_EXT_NAT_T_TYPE: 7527 case SADB_X_EXT_NAT_T_SPORT: 7528 case SADB_X_EXT_NAT_T_DPORT: 7529 case SADB_X_EXT_NAT_T_OAI: 7530 case SADB_X_EXT_NAT_T_OAR: 7531 case SADB_X_EXT_NAT_T_FRAG: 7532 /* duplicate check */ 7533 /* 7534 * XXX Are there duplication payloads of either 7535 * KEY_AUTH or KEY_ENCRYPT ? 7536 */ 7537 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7538 IPSECLOG(LOG_DEBUG, 7539 "duplicate ext_type %u is passed.\n", 7540 ext->sadb_ext_type); 7541 m_freem(m); 7542 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7543 return EINVAL; 7544 } 7545 break; 7546 default: 7547 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 7548 ext->sadb_ext_type); 7549 m_freem(m); 7550 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7551 return EINVAL; 7552 } 7553 7554 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7555 7556 if (key_validate_ext(ext, extlen)) { 7557 m_freem(m); 7558 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7559 return EINVAL; 7560 } 7561 7562 n = m_pulldown(m, off, extlen, &toff); 7563 if (!n) { 7564 /* m is already freed */ 7565 return ENOBUFS; 7566 } 7567 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7568 7569 mhp->ext[ext->sadb_ext_type] = ext; 7570 mhp->extoff[ext->sadb_ext_type] = off; 7571 mhp->extlen[ext->sadb_ext_type] = extlen; 7572 } 7573 7574 if (off != end) { 7575 m_freem(m); 7576 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7577 return EINVAL; 7578 } 7579 7580 return 0; 7581 } 7582 7583 static int 7584 key_validate_ext(const struct sadb_ext *ext, int len) 7585 { 7586 const struct sockaddr *sa; 7587 enum { NONE, ADDR } checktype = NONE; 7588 int baselen = 0; 7589 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7590 7591 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7592 return EINVAL; 7593 7594 /* if it does not match minimum/maximum length, bail */ 7595 if (ext->sadb_ext_type >= __arraycount(minsize) || 7596 ext->sadb_ext_type >= __arraycount(maxsize)) 7597 return EINVAL; 7598 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7599 return EINVAL; 7600 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7601 return EINVAL; 7602 7603 /* more checks based on sadb_ext_type XXX need more */ 7604 switch (ext->sadb_ext_type) { 7605 case SADB_EXT_ADDRESS_SRC: 7606 case SADB_EXT_ADDRESS_DST: 7607 case SADB_EXT_ADDRESS_PROXY: 7608 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7609 checktype = ADDR; 7610 break; 7611 case SADB_EXT_IDENTITY_SRC: 7612 case SADB_EXT_IDENTITY_DST: 7613 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7614 SADB_X_IDENTTYPE_ADDR) { 7615 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7616 checktype = ADDR; 7617 } else 7618 checktype = NONE; 7619 break; 7620 default: 7621 checktype = NONE; 7622 break; 7623 } 7624 7625 switch (checktype) { 7626 case NONE: 7627 break; 7628 case ADDR: 7629 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7630 if (len < baselen + sal) 7631 return EINVAL; 7632 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7633 return EINVAL; 7634 break; 7635 } 7636 7637 return 0; 7638 } 7639 7640 static int 7641 key_do_init(void) 7642 { 7643 int i, error; 7644 7645 mutex_init(&key_mtx, MUTEX_DEFAULT, IPL_NONE); 7646 7647 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7648 7649 callout_init(&key_timehandler_ch, 0); 7650 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 7651 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 7652 if (error != 0) 7653 panic("%s: workqueue_create failed (%d)\n", __func__, error); 7654 7655 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7656 LIST_INIT(&sptree[i]); 7657 } 7658 7659 LIST_INIT(&sahtree); 7660 7661 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7662 LIST_INIT(®tree[i]); 7663 } 7664 7665 #ifndef IPSEC_NONBLOCK_ACQUIRE 7666 LIST_INIT(&acqtree); 7667 #endif 7668 #ifdef notyet 7669 LIST_INIT(&spacqtree); 7670 #endif 7671 7672 /* system default */ 7673 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7674 ip4_def_policy.refcnt++; /*never reclaim this*/ 7675 7676 #ifdef INET6 7677 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7678 ip6_def_policy.refcnt++; /*never reclaim this*/ 7679 #endif 7680 7681 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7682 7683 /* initialize key statistics */ 7684 keystat.getspi_count = 1; 7685 7686 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7687 7688 return (0); 7689 } 7690 7691 void 7692 key_init(void) 7693 { 7694 static ONCE_DECL(key_init_once); 7695 7696 sysctl_net_keyv2_setup(NULL); 7697 sysctl_net_key_compat_setup(NULL); 7698 7699 RUN_ONCE(&key_init_once, key_do_init); 7700 } 7701 7702 /* 7703 * XXX: maybe This function is called after INBOUND IPsec processing. 7704 * 7705 * Special check for tunnel-mode packets. 7706 * We must make some checks for consistency between inner and outer IP header. 7707 * 7708 * xxx more checks to be provided 7709 */ 7710 int 7711 key_checktunnelsanity( 7712 struct secasvar *sav, 7713 u_int family, 7714 void *src, 7715 void *dst 7716 ) 7717 { 7718 7719 KASSERT(sav->sah != NULL); 7720 7721 /* XXX: check inner IP header */ 7722 7723 return 1; 7724 } 7725 7726 #if 0 7727 #define hostnamelen strlen(hostname) 7728 7729 /* 7730 * Get FQDN for the host. 7731 * If the administrator configured hostname (by hostname(1)) without 7732 * domain name, returns nothing. 7733 */ 7734 static const char * 7735 key_getfqdn(void) 7736 { 7737 int i; 7738 int hasdot; 7739 static char fqdn[MAXHOSTNAMELEN + 1]; 7740 7741 if (!hostnamelen) 7742 return NULL; 7743 7744 /* check if it comes with domain name. */ 7745 hasdot = 0; 7746 for (i = 0; i < hostnamelen; i++) { 7747 if (hostname[i] == '.') 7748 hasdot++; 7749 } 7750 if (!hasdot) 7751 return NULL; 7752 7753 /* NOTE: hostname may not be NUL-terminated. */ 7754 memset(fqdn, 0, sizeof(fqdn)); 7755 memcpy(fqdn, hostname, hostnamelen); 7756 fqdn[hostnamelen] = '\0'; 7757 return fqdn; 7758 } 7759 7760 /* 7761 * get username@FQDN for the host/user. 7762 */ 7763 static const char * 7764 key_getuserfqdn(void) 7765 { 7766 const char *host; 7767 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7768 struct proc *p = curproc; 7769 char *q; 7770 7771 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7772 return NULL; 7773 if (!(host = key_getfqdn())) 7774 return NULL; 7775 7776 /* NOTE: s_login may not be-NUL terminated. */ 7777 memset(userfqdn, 0, sizeof(userfqdn)); 7778 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7779 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7780 q = userfqdn + strlen(userfqdn); 7781 *q++ = '@'; 7782 memcpy(q, host, strlen(host)); 7783 q += strlen(host); 7784 *q++ = '\0'; 7785 7786 return userfqdn; 7787 } 7788 #endif 7789 7790 /* record data transfer on SA, and update timestamps */ 7791 void 7792 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7793 { 7794 7795 KASSERT(sav != NULL); 7796 KASSERT(m != NULL); 7797 if (!sav->lft_c) 7798 return; 7799 7800 /* 7801 * XXX Currently, there is a difference of bytes size 7802 * between inbound and outbound processing. 7803 */ 7804 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7805 /* to check bytes lifetime is done in key_timehandler(). */ 7806 7807 /* 7808 * We use the number of packets as the unit of 7809 * sadb_lifetime_allocations. We increment the variable 7810 * whenever {esp,ah}_{in,out}put is called. 7811 */ 7812 sav->lft_c->sadb_lifetime_allocations++; 7813 /* XXX check for expires? */ 7814 7815 /* 7816 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7817 * in seconds. HARD and SOFT lifetime are measured by the time 7818 * difference (again in seconds) from sadb_lifetime_usetime. 7819 * 7820 * usetime 7821 * v expire expire 7822 * -----+-----+--------+---> t 7823 * <--------------> HARD 7824 * <-----> SOFT 7825 */ 7826 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7827 /* XXX check for expires? */ 7828 7829 return; 7830 } 7831 7832 /* dumb version */ 7833 void 7834 key_sa_routechange(struct sockaddr *dst) 7835 { 7836 struct secashead *sah; 7837 struct route *ro; 7838 const struct sockaddr *sa; 7839 7840 LIST_FOREACH(sah, &sahtree, chain) { 7841 ro = &sah->sa_route; 7842 sa = rtcache_getdst(ro); 7843 if (sa != NULL && dst->sa_len == sa->sa_len && 7844 memcmp(dst, sa, dst->sa_len) == 0) 7845 rtcache_free(ro); 7846 } 7847 7848 return; 7849 } 7850 7851 static void 7852 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7853 { 7854 7855 KASSERT(sav != NULL); 7856 7857 if (sav->state == state) 7858 return; 7859 7860 KASSERT(__LIST_CHAINED(sav)); 7861 LIST_REMOVE(sav, chain); 7862 7863 sav->state = state; 7864 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7865 } 7866 7867 /* XXX too much? */ 7868 static struct mbuf * 7869 key_alloc_mbuf(int l) 7870 { 7871 struct mbuf *m = NULL, *n; 7872 int len, t; 7873 7874 len = l; 7875 while (len > 0) { 7876 MGET(n, M_DONTWAIT, MT_DATA); 7877 if (n && len > MLEN) 7878 MCLGET(n, M_DONTWAIT); 7879 if (!n) { 7880 m_freem(m); 7881 return NULL; 7882 } 7883 7884 n->m_next = NULL; 7885 n->m_len = 0; 7886 n->m_len = M_TRAILINGSPACE(n); 7887 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7888 if (n->m_len > len) { 7889 t = (n->m_len - len) & ~(sizeof(long) - 1); 7890 n->m_data += t; 7891 n->m_len = len; 7892 } 7893 7894 len -= n->m_len; 7895 7896 if (m) 7897 m_cat(m, n); 7898 else 7899 m = n; 7900 } 7901 7902 return m; 7903 } 7904 7905 static struct mbuf * 7906 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7907 { 7908 struct secashead *sah; 7909 struct secasvar *sav; 7910 u_int16_t proto; 7911 u_int8_t satype; 7912 u_int8_t state; 7913 int cnt; 7914 struct mbuf *m, *n; 7915 7916 /* map satype to proto */ 7917 proto = key_satype2proto(req_satype); 7918 if (proto == 0) { 7919 *errorp = EINVAL; 7920 return (NULL); 7921 } 7922 7923 /* count sav entries to be sent to the userland. */ 7924 cnt = 0; 7925 LIST_FOREACH(sah, &sahtree, chain) { 7926 if (req_satype != SADB_SATYPE_UNSPEC && 7927 proto != sah->saidx.proto) 7928 continue; 7929 7930 SASTATE_ANY_FOREACH(state) { 7931 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7932 cnt++; 7933 } 7934 } 7935 } 7936 7937 if (cnt == 0) { 7938 *errorp = ENOENT; 7939 return (NULL); 7940 } 7941 7942 /* send this to the userland, one at a time. */ 7943 m = NULL; 7944 LIST_FOREACH(sah, &sahtree, chain) { 7945 if (req_satype != SADB_SATYPE_UNSPEC && 7946 proto != sah->saidx.proto) 7947 continue; 7948 7949 /* map proto to satype */ 7950 satype = key_proto2satype(sah->saidx.proto); 7951 if (satype == 0) { 7952 m_freem(m); 7953 *errorp = EINVAL; 7954 return (NULL); 7955 } 7956 7957 SASTATE_ANY_FOREACH(state) { 7958 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7959 n = key_setdumpsa(sav, SADB_DUMP, satype, 7960 --cnt, pid); 7961 if (!n) { 7962 m_freem(m); 7963 *errorp = ENOBUFS; 7964 return (NULL); 7965 } 7966 7967 if (!m) 7968 m = n; 7969 else 7970 m_cat(m, n); 7971 } 7972 } 7973 } 7974 7975 if (!m) { 7976 *errorp = EINVAL; 7977 return (NULL); 7978 } 7979 7980 if ((m->m_flags & M_PKTHDR) != 0) { 7981 m->m_pkthdr.len = 0; 7982 for (n = m; n; n = n->m_next) 7983 m->m_pkthdr.len += n->m_len; 7984 } 7985 7986 *errorp = 0; 7987 return (m); 7988 } 7989 7990 static struct mbuf * 7991 key_setspddump(int *errorp, pid_t pid) 7992 { 7993 struct secpolicy *sp; 7994 int cnt; 7995 u_int dir; 7996 struct mbuf *m, *n; 7997 7998 /* search SPD entry and get buffer size. */ 7999 cnt = 0; 8000 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8001 LIST_FOREACH(sp, &sptree[dir], chain) { 8002 cnt++; 8003 } 8004 } 8005 8006 if (cnt == 0) { 8007 *errorp = ENOENT; 8008 return (NULL); 8009 } 8010 8011 m = NULL; 8012 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8013 LIST_FOREACH(sp, &sptree[dir], chain) { 8014 --cnt; 8015 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8016 8017 if (!n) { 8018 *errorp = ENOBUFS; 8019 m_freem(m); 8020 return (NULL); 8021 } 8022 if (!m) 8023 m = n; 8024 else { 8025 m->m_pkthdr.len += n->m_pkthdr.len; 8026 m_cat(m, n); 8027 } 8028 } 8029 } 8030 8031 *errorp = 0; 8032 return (m); 8033 } 8034 8035 int 8036 key_get_used(void) { 8037 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8038 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8039 } 8040 8041 void 8042 key_update_used(void) 8043 { 8044 switch (ipsec_enabled) { 8045 default: 8046 case 0: 8047 #ifdef notyet 8048 /* XXX: racy */ 8049 ipsec_used = 0; 8050 #endif 8051 break; 8052 case 1: 8053 #ifndef notyet 8054 /* XXX: racy */ 8055 if (!ipsec_used) 8056 #endif 8057 ipsec_used = key_get_used(); 8058 break; 8059 case 2: 8060 ipsec_used = 1; 8061 break; 8062 } 8063 } 8064 8065 static int 8066 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8067 { 8068 struct mbuf *m, *n; 8069 int err2 = 0; 8070 char *p, *ep; 8071 size_t len; 8072 int s, error; 8073 8074 if (newp) 8075 return (EPERM); 8076 if (namelen != 1) 8077 return (EINVAL); 8078 8079 s = splsoftnet(); 8080 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8081 splx(s); 8082 if (!m) 8083 return (error); 8084 if (!oldp) 8085 *oldlenp = m->m_pkthdr.len; 8086 else { 8087 p = oldp; 8088 if (*oldlenp < m->m_pkthdr.len) { 8089 err2 = ENOMEM; 8090 ep = p + *oldlenp; 8091 } else { 8092 *oldlenp = m->m_pkthdr.len; 8093 ep = p + m->m_pkthdr.len; 8094 } 8095 for (n = m; n; n = n->m_next) { 8096 len = (ep - p < n->m_len) ? 8097 ep - p : n->m_len; 8098 error = copyout(mtod(n, const void *), p, len); 8099 p += len; 8100 if (error) 8101 break; 8102 } 8103 if (error == 0) 8104 error = err2; 8105 } 8106 m_freem(m); 8107 8108 return (error); 8109 } 8110 8111 static int 8112 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8113 { 8114 struct mbuf *m, *n; 8115 int err2 = 0; 8116 char *p, *ep; 8117 size_t len; 8118 int s, error; 8119 8120 if (newp) 8121 return (EPERM); 8122 if (namelen != 0) 8123 return (EINVAL); 8124 8125 s = splsoftnet(); 8126 m = key_setspddump(&error, l->l_proc->p_pid); 8127 splx(s); 8128 if (!m) 8129 return (error); 8130 if (!oldp) 8131 *oldlenp = m->m_pkthdr.len; 8132 else { 8133 p = oldp; 8134 if (*oldlenp < m->m_pkthdr.len) { 8135 err2 = ENOMEM; 8136 ep = p + *oldlenp; 8137 } else { 8138 *oldlenp = m->m_pkthdr.len; 8139 ep = p + m->m_pkthdr.len; 8140 } 8141 for (n = m; n; n = n->m_next) { 8142 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8143 error = copyout(mtod(n, const void *), p, len); 8144 p += len; 8145 if (error) 8146 break; 8147 } 8148 if (error == 0) 8149 error = err2; 8150 } 8151 m_freem(m); 8152 8153 return (error); 8154 } 8155 8156 /* 8157 * Create sysctl tree for native IPSEC key knobs, originally 8158 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8159 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8160 * and in any case the part of our sysctl namespace used for dumping the 8161 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8162 * namespace, for API reasons. 8163 * 8164 * Pending a consensus on the right way to fix this, add a level of 8165 * indirection in how we number the `native' IPSEC key nodes; 8166 * and (as requested by Andrew Brown) move registration of the 8167 * KAME-compatible names to a separate function. 8168 */ 8169 #if 0 8170 # define IPSEC_PFKEY PF_KEY_V2 8171 # define IPSEC_PFKEY_NAME "keyv2" 8172 #else 8173 # define IPSEC_PFKEY PF_KEY 8174 # define IPSEC_PFKEY_NAME "key" 8175 #endif 8176 8177 static int 8178 sysctl_net_key_stats(SYSCTLFN_ARGS) 8179 { 8180 8181 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8182 } 8183 8184 static void 8185 sysctl_net_keyv2_setup(struct sysctllog **clog) 8186 { 8187 8188 sysctl_createv(clog, 0, NULL, NULL, 8189 CTLFLAG_PERMANENT, 8190 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8191 NULL, 0, NULL, 0, 8192 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8193 8194 sysctl_createv(clog, 0, NULL, NULL, 8195 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8196 CTLTYPE_INT, "debug", NULL, 8197 NULL, 0, &key_debug_level, 0, 8198 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8199 sysctl_createv(clog, 0, NULL, NULL, 8200 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8201 CTLTYPE_INT, "spi_try", NULL, 8202 NULL, 0, &key_spi_trycnt, 0, 8203 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8204 sysctl_createv(clog, 0, NULL, NULL, 8205 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8206 CTLTYPE_INT, "spi_min_value", NULL, 8207 NULL, 0, &key_spi_minval, 0, 8208 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8209 sysctl_createv(clog, 0, NULL, NULL, 8210 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8211 CTLTYPE_INT, "spi_max_value", NULL, 8212 NULL, 0, &key_spi_maxval, 0, 8213 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8214 sysctl_createv(clog, 0, NULL, NULL, 8215 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8216 CTLTYPE_INT, "random_int", NULL, 8217 NULL, 0, &key_int_random, 0, 8218 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8219 sysctl_createv(clog, 0, NULL, NULL, 8220 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8221 CTLTYPE_INT, "larval_lifetime", NULL, 8222 NULL, 0, &key_larval_lifetime, 0, 8223 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8224 sysctl_createv(clog, 0, NULL, NULL, 8225 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8226 CTLTYPE_INT, "blockacq_count", NULL, 8227 NULL, 0, &key_blockacq_count, 0, 8228 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8229 sysctl_createv(clog, 0, NULL, NULL, 8230 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8231 CTLTYPE_INT, "blockacq_lifetime", NULL, 8232 NULL, 0, &key_blockacq_lifetime, 0, 8233 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8234 sysctl_createv(clog, 0, NULL, NULL, 8235 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8236 CTLTYPE_INT, "esp_keymin", NULL, 8237 NULL, 0, &ipsec_esp_keymin, 0, 8238 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8239 sysctl_createv(clog, 0, NULL, NULL, 8240 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8241 CTLTYPE_INT, "prefered_oldsa", NULL, 8242 NULL, 0, &key_prefered_oldsa, 0, 8243 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8244 sysctl_createv(clog, 0, NULL, NULL, 8245 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8246 CTLTYPE_INT, "esp_auth", NULL, 8247 NULL, 0, &ipsec_esp_auth, 0, 8248 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8249 sysctl_createv(clog, 0, NULL, NULL, 8250 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8251 CTLTYPE_INT, "ah_keymin", NULL, 8252 NULL, 0, &ipsec_ah_keymin, 0, 8253 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8254 sysctl_createv(clog, 0, NULL, NULL, 8255 CTLFLAG_PERMANENT, 8256 CTLTYPE_STRUCT, "stats", 8257 SYSCTL_DESCR("PF_KEY statistics"), 8258 sysctl_net_key_stats, 0, NULL, 0, 8259 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8260 } 8261 8262 /* 8263 * Register sysctl names used by setkey(8). For historical reasons, 8264 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8265 * for both IPSEC and KAME IPSEC. 8266 */ 8267 static void 8268 sysctl_net_key_compat_setup(struct sysctllog **clog) 8269 { 8270 8271 sysctl_createv(clog, 0, NULL, NULL, 8272 CTLFLAG_PERMANENT, 8273 CTLTYPE_NODE, "key", NULL, 8274 NULL, 0, NULL, 0, 8275 CTL_NET, PF_KEY, CTL_EOL); 8276 8277 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8278 sysctl_createv(clog, 0, NULL, NULL, 8279 CTLFLAG_PERMANENT, 8280 CTLTYPE_STRUCT, "dumpsa", NULL, 8281 sysctl_net_key_dumpsa, 0, NULL, 0, 8282 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8283 sysctl_createv(clog, 0, NULL, NULL, 8284 CTLFLAG_PERMANENT, 8285 CTLTYPE_STRUCT, "dumpsp", NULL, 8286 sysctl_net_key_dumpsp, 0, NULL, 0, 8287 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8288 } 8289
Indexes created Wed Sep 24 15:09:51 GMT 2025