key.c revision 1.133
1 /* $NetBSD: key.c,v 1.133 2017/05/19 04:39:25 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 1.133 2017/05/19 04:39:25 ozaki-r Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #if defined(_KERNEL_OPT) 42 #include "opt_inet.h" 43 #include "opt_ipsec.h" 44 #include "opt_gateway.h" 45 #endif 46 47 #include <sys/types.h> 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/callout.h> 51 #include <sys/kernel.h> 52 #include <sys/mbuf.h> 53 #include <sys/domain.h> 54 #include <sys/protosw.h> 55 #include <sys/socket.h> 56 #include <sys/socketvar.h> 57 #include <sys/sysctl.h> 58 #include <sys/errno.h> 59 #include <sys/proc.h> 60 #include <sys/queue.h> 61 #include <sys/syslog.h> 62 #include <sys/once.h> 63 #include <sys/cprng.h> 64 #include <sys/psref.h> 65 #include <sys/lwp.h> 66 #include <sys/workqueue.h> 67 #include <sys/kmem.h> 68 #include <sys/cpu.h> 69 70 #include <net/if.h> 71 #include <net/route.h> 72 #include <net/raw_cb.h> 73 74 #include <netinet/in.h> 75 #include <netinet/in_systm.h> 76 #include <netinet/ip.h> 77 #include <netinet/in_var.h> 78 #ifdef INET 79 #include <netinet/ip_var.h> 80 #endif 81 82 #ifdef INET6 83 #include <netinet/ip6.h> 84 #include <netinet6/in6_var.h> 85 #include <netinet6/ip6_var.h> 86 #endif /* INET6 */ 87 88 #ifdef INET 89 #include <netinet/in_pcb.h> 90 #endif 91 #ifdef INET6 92 #include <netinet6/in6_pcb.h> 93 #endif /* INET6 */ 94 95 #include <net/pfkeyv2.h> 96 #include <netipsec/keydb.h> 97 #include <netipsec/key.h> 98 #include <netipsec/keysock.h> 99 #include <netipsec/key_debug.h> 100 101 #include <netipsec/ipsec.h> 102 #ifdef INET6 103 #include <netipsec/ipsec6.h> 104 #endif 105 #include <netipsec/ipsec_private.h> 106 107 #include <netipsec/xform.h> 108 #include <netipsec/ipcomp.h> 109 110 111 #include <net/net_osdep.h> 112 113 #define FULLMASK 0xff 114 #define _BITS(bytes) ((bytes) << 3) 115 116 #define PORT_NONE 0 117 #define PORT_LOOSE 1 118 #define PORT_STRICT 2 119 120 percpu_t *pfkeystat_percpu; 121 122 /* 123 * Note on SA reference counting: 124 * - SAs that are not in DEAD state will have (total external reference + 1) 125 * following value in reference count field. they cannot be freed and are 126 * referenced from SA header. 127 * - SAs that are in DEAD state will have (total external reference) 128 * in reference count field. they are ready to be freed. reference from 129 * SA header will be removed in key_delsav(), when the reference count 130 * field hits 0 (= no external reference other than from SA header. 131 */ 132 133 u_int32_t key_debug_level = 0; 134 static u_int key_spi_trycnt = 1000; 135 static u_int32_t key_spi_minval = 0x100; 136 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 137 static u_int32_t policy_id = 0; 138 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 139 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 140 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 141 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 142 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 143 144 static u_int32_t acq_seq = 0; 145 146 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 147 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 148 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 149 /* registed list */ 150 #ifndef IPSEC_NONBLOCK_ACQUIRE 151 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 152 #endif 153 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 154 155 /* search order for SAs */ 156 /* 157 * This order is important because we must select the oldest SA 158 * for outbound processing. For inbound, This is not important. 159 */ 160 static const u_int saorder_state_valid_prefer_old[] = { 161 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 162 }; 163 static const u_int saorder_state_valid_prefer_new[] = { 164 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 165 }; 166 167 static const u_int saorder_state_alive[] = { 168 /* except DEAD */ 169 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 170 }; 171 static const u_int saorder_state_any[] = { 172 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 173 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 174 }; 175 176 #define SASTATE_ALIVE_FOREACH(s) \ 177 for (int _i = 0; \ 178 _i < __arraycount(saorder_state_alive) ? \ 179 (s) = saorder_state_alive[_i], true : false; \ 180 _i++) 181 #define SASTATE_ANY_FOREACH(s) \ 182 for (int _i = 0; \ 183 _i < __arraycount(saorder_state_any) ? \ 184 (s) = saorder_state_any[_i], true : false; \ 185 _i++) 186 187 static const int minsize[] = { 188 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 189 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 190 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 191 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 192 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 193 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 194 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 195 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 196 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 197 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 198 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 199 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 200 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 201 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 202 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 203 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 204 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 205 0, /* SADB_X_EXT_KMPRIVATE */ 206 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 207 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 208 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 209 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 210 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 211 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 212 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 213 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 214 }; 215 static const int maxsize[] = { 216 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 217 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 218 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 219 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 220 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 221 0, /* SADB_EXT_ADDRESS_SRC */ 222 0, /* SADB_EXT_ADDRESS_DST */ 223 0, /* SADB_EXT_ADDRESS_PROXY */ 224 0, /* SADB_EXT_KEY_AUTH */ 225 0, /* SADB_EXT_KEY_ENCRYPT */ 226 0, /* SADB_EXT_IDENTITY_SRC */ 227 0, /* SADB_EXT_IDENTITY_DST */ 228 0, /* SADB_EXT_SENSITIVITY */ 229 0, /* SADB_EXT_PROPOSAL */ 230 0, /* SADB_EXT_SUPPORTED_AUTH */ 231 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 232 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 233 0, /* SADB_X_EXT_KMPRIVATE */ 234 0, /* SADB_X_EXT_POLICY */ 235 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 236 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 237 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 238 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 239 0, /* SADB_X_EXT_NAT_T_OAI */ 240 0, /* SADB_X_EXT_NAT_T_OAR */ 241 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 242 }; 243 244 static int ipsec_esp_keymin = 256; 245 static int ipsec_esp_auth = 0; 246 static int ipsec_ah_keymin = 128; 247 248 #ifdef SYSCTL_DECL 249 SYSCTL_DECL(_net_key); 250 #endif 251 252 #ifdef SYSCTL_INT 253 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 254 &key_debug_level, 0, ""); 255 256 /* max count of trial for the decision of spi value */ 257 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 258 &key_spi_trycnt, 0, ""); 259 260 /* minimum spi value to allocate automatically. */ 261 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 262 &key_spi_minval, 0, ""); 263 264 /* maximun spi value to allocate automatically. */ 265 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 266 &key_spi_maxval, 0, ""); 267 268 /* interval to initialize randseed */ 269 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 270 &key_int_random, 0, ""); 271 272 /* lifetime for larval SA */ 273 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 274 &key_larval_lifetime, 0, ""); 275 276 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 277 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 278 &key_blockacq_count, 0, ""); 279 280 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 281 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 282 &key_blockacq_lifetime, 0, ""); 283 284 /* ESP auth */ 285 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 286 &ipsec_esp_auth, 0, ""); 287 288 /* minimum ESP key length */ 289 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 290 &ipsec_esp_keymin, 0, ""); 291 292 /* minimum AH key length */ 293 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 294 &ipsec_ah_keymin, 0, ""); 295 296 /* perfered old SA rather than new SA */ 297 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 298 &key_prefered_oldsa, 0, ""); 299 #endif /* SYSCTL_INT */ 300 301 #define __LIST_CHAINED(elm) \ 302 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 303 #define LIST_INSERT_TAIL(head, elm, type, field) \ 304 do {\ 305 struct type *curelm = LIST_FIRST(head); \ 306 if (curelm == NULL) {\ 307 LIST_INSERT_HEAD(head, elm, field); \ 308 } else { \ 309 while (LIST_NEXT(curelm, field)) \ 310 curelm = LIST_NEXT(curelm, field);\ 311 LIST_INSERT_AFTER(curelm, elm, field);\ 312 }\ 313 } while (0) 314 315 #define KEY_CHKSASTATE(head, sav, name) \ 316 /* do */ { \ 317 if ((head) != (sav)) { \ 318 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 319 (name), (head), (sav))); \ 320 continue; \ 321 } \ 322 } /* while (0) */ 323 324 #define KEY_CHKSPDIR(head, sp, name) \ 325 do { \ 326 if ((head) != (sp)) { \ 327 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 328 "anyway continue.\n", \ 329 (name), (head), (sp))); \ 330 } \ 331 } while (0) 332 333 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 334 335 /* 336 * set parameters into secpolicyindex buffer. 337 * Must allocate secpolicyindex buffer passed to this function. 338 */ 339 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 340 do { \ 341 memset((idx), 0, sizeof(struct secpolicyindex)); \ 342 (idx)->dir = (_dir); \ 343 (idx)->prefs = (ps); \ 344 (idx)->prefd = (pd); \ 345 (idx)->ul_proto = (ulp); \ 346 memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \ 347 memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \ 348 } while (0) 349 350 /* 351 * set parameters into secasindex buffer. 352 * Must allocate secasindex buffer before calling this function. 353 */ 354 static int 355 key_setsecasidx (int, int, int, const struct sadb_address *, 356 const struct sadb_address *, struct secasindex *); 357 358 /* key statistics */ 359 struct _keystat { 360 u_long getspi_count; /* the avarage of count to try to get new SPI */ 361 } keystat; 362 363 struct sadb_msghdr { 364 struct sadb_msg *msg; 365 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 366 int extoff[SADB_EXT_MAX + 1]; 367 int extlen[SADB_EXT_MAX + 1]; 368 }; 369 370 static struct secasvar *key_allocsa_policy (const struct secasindex *); 371 static void key_freesp_so (struct secpolicy **); 372 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int); 373 static void key_delsp (struct secpolicy *); 374 static struct secpolicy *key_getsp (const struct secpolicyindex *); 375 static struct secpolicy *key_getspbyid (u_int32_t); 376 static u_int16_t key_newreqid (void); 377 static struct mbuf *key_gather_mbuf (struct mbuf *, 378 const struct sadb_msghdr *, int, int, ...); 379 static int key_spdadd (struct socket *, struct mbuf *, 380 const struct sadb_msghdr *); 381 static u_int32_t key_getnewspid (void); 382 static int key_spddelete (struct socket *, struct mbuf *, 383 const struct sadb_msghdr *); 384 static int key_spddelete2 (struct socket *, struct mbuf *, 385 const struct sadb_msghdr *); 386 static int key_spdget (struct socket *, struct mbuf *, 387 const struct sadb_msghdr *); 388 static int key_spdflush (struct socket *, struct mbuf *, 389 const struct sadb_msghdr *); 390 static int key_spddump (struct socket *, struct mbuf *, 391 const struct sadb_msghdr *); 392 static struct mbuf * key_setspddump (int *errorp, pid_t); 393 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 394 static int key_nat_map (struct socket *, struct mbuf *, 395 const struct sadb_msghdr *); 396 static struct mbuf *key_setdumpsp (struct secpolicy *, 397 u_int8_t, u_int32_t, pid_t); 398 static u_int key_getspreqmsglen (const struct secpolicy *); 399 static int key_spdexpire (struct secpolicy *); 400 static struct secashead *key_newsah (const struct secasindex *); 401 static void key_delsah (struct secashead *); 402 static struct secasvar *key_newsav (struct mbuf *, 403 const struct sadb_msghdr *, struct secashead *, int *, 404 const char*, int); 405 #define KEY_NEWSAV(m, sadb, sah, e) \ 406 key_newsav(m, sadb, sah, e, __func__, __LINE__) 407 static void key_delsav (struct secasvar *); 408 static struct secashead *key_getsah (const struct secasindex *); 409 static struct secasvar *key_checkspidup (const struct secasindex *, u_int32_t); 410 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 411 static int key_setsaval (struct secasvar *, struct mbuf *, 412 const struct sadb_msghdr *); 413 static void key_freesaval(struct secasvar *); 414 static int key_mature (struct secasvar *); 415 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 416 u_int8_t, u_int32_t, u_int32_t); 417 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 418 static struct mbuf *key_setsadbxtype (u_int16_t); 419 static struct mbuf *key_setsadbxfrag (u_int16_t); 420 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 421 static int key_checksalen (const union sockaddr_union *); 422 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 423 u_int32_t, pid_t, u_int16_t); 424 static struct mbuf *key_setsadbsa (struct secasvar *); 425 static struct mbuf *key_setsadbaddr (u_int16_t, 426 const struct sockaddr *, u_int8_t, u_int16_t); 427 #if 0 428 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 429 int, u_int64_t); 430 #endif 431 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 432 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 433 u_int32_t); 434 static void *key_newbuf (const void *, u_int); 435 #ifdef INET6 436 static int key_ismyaddr6 (const struct sockaddr_in6 *); 437 #endif 438 439 static void sysctl_net_keyv2_setup(struct sysctllog **); 440 static void sysctl_net_key_compat_setup(struct sysctllog **); 441 442 /* flags for key_cmpsaidx() */ 443 #define CMP_HEAD 1 /* protocol, addresses. */ 444 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 445 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 446 #define CMP_EXACTLY 4 /* all elements. */ 447 static int key_cmpsaidx 448 (const struct secasindex *, const struct secasindex *, int); 449 450 static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int); 451 static int key_bbcmp (const void *, const void *, u_int); 452 static u_int16_t key_satype2proto (u_int8_t); 453 static u_int8_t key_proto2satype (u_int16_t); 454 455 static int key_getspi (struct socket *, struct mbuf *, 456 const struct sadb_msghdr *); 457 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 458 const struct secasindex *); 459 static int key_handle_natt_info (struct secasvar *, 460 const struct sadb_msghdr *); 461 static int key_set_natt_ports (union sockaddr_union *, 462 union sockaddr_union *, 463 const struct sadb_msghdr *); 464 static int key_update (struct socket *, struct mbuf *, 465 const struct sadb_msghdr *); 466 #ifdef IPSEC_DOSEQCHECK 467 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 468 #endif 469 static int key_add (struct socket *, struct mbuf *, 470 const struct sadb_msghdr *); 471 static int key_setident (struct secashead *, struct mbuf *, 472 const struct sadb_msghdr *); 473 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 474 const struct sadb_msghdr *); 475 static int key_delete (struct socket *, struct mbuf *, 476 const struct sadb_msghdr *); 477 static int key_get (struct socket *, struct mbuf *, 478 const struct sadb_msghdr *); 479 480 static void key_getcomb_setlifetime (struct sadb_comb *); 481 static struct mbuf *key_getcomb_esp (void); 482 static struct mbuf *key_getcomb_ah (void); 483 static struct mbuf *key_getcomb_ipcomp (void); 484 static struct mbuf *key_getprop (const struct secasindex *); 485 486 static int key_acquire (const struct secasindex *, struct secpolicy *); 487 #ifndef IPSEC_NONBLOCK_ACQUIRE 488 static struct secacq *key_newacq (const struct secasindex *); 489 static struct secacq *key_getacq (const struct secasindex *); 490 static struct secacq *key_getacqbyseq (u_int32_t); 491 #endif 492 static struct secspacq *key_newspacq (const struct secpolicyindex *); 493 static struct secspacq *key_getspacq (const struct secpolicyindex *); 494 static int key_acquire2 (struct socket *, struct mbuf *, 495 const struct sadb_msghdr *); 496 static int key_register (struct socket *, struct mbuf *, 497 const struct sadb_msghdr *); 498 static int key_expire (struct secasvar *); 499 static int key_flush (struct socket *, struct mbuf *, 500 const struct sadb_msghdr *); 501 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 502 int *lenp, pid_t pid); 503 static int key_dump (struct socket *, struct mbuf *, 504 const struct sadb_msghdr *); 505 static int key_promisc (struct socket *, struct mbuf *, 506 const struct sadb_msghdr *); 507 static int key_senderror (struct socket *, struct mbuf *, int); 508 static int key_validate_ext (const struct sadb_ext *, int); 509 static int key_align (struct mbuf *, struct sadb_msghdr *); 510 #if 0 511 static const char *key_getfqdn (void); 512 static const char *key_getuserfqdn (void); 513 #endif 514 static void key_sa_chgstate (struct secasvar *, u_int8_t); 515 static inline void key_sp_dead (struct secpolicy *); 516 static void key_sp_unlink (struct secpolicy *sp); 517 518 static struct mbuf *key_alloc_mbuf (int); 519 520 static void key_timehandler(void *); 521 static void key_timehandler_work(struct work *, void *); 522 static struct callout key_timehandler_ch; 523 static struct workqueue *key_timehandler_wq; 524 static struct work key_timehandler_wk; 525 526 #ifdef IPSEC_REF_DEBUG 527 #define REFLOG(label, p, where, tag) \ 528 ipseclog((LOG_DEBUG, "%s:%d: " label " : refcnt=%d (%p)\n.", \ 529 (where), (tag), (p)->refcnt, (p))) 530 #else 531 #define REFLOG(label, p, where, tag) do {} while (0) 532 #endif 533 534 #define SA_ADDREF(p) do { \ 535 (p)->refcnt++; \ 536 REFLOG("SA_ADDREF", (p), __func__, __LINE__); \ 537 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 538 } while (0) 539 #define SA_ADDREF2(p, where, tag) do { \ 540 (p)->refcnt++; \ 541 REFLOG("SA_ADDREF", (p), (where), (tag)); \ 542 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 543 } while (0) 544 #define SA_DELREF(p) do { \ 545 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 546 (p)->refcnt--; \ 547 REFLOG("SA_DELREF", (p), __func__, __LINE__); \ 548 } while (0) 549 #define SA_DELREF2(p, where, tag) do { \ 550 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 551 (p)->refcnt--; \ 552 REFLOG("SA_DELREF", (p), (where), (tag)); \ 553 } while (0) 554 555 #define SP_ADDREF(p) do { \ 556 (p)->refcnt++; \ 557 REFLOG("SP_ADDREF", (p), __func__, __LINE__); \ 558 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 559 } while (0) 560 #define SP_ADDREF2(p, where, tag) do { \ 561 (p)->refcnt++; \ 562 REFLOG("SP_ADDREF", (p), (where), (tag)); \ 563 KASSERTMSG((p)->refcnt != 0, "SP refcnt overflow"); \ 564 } while (0) 565 #define SP_DELREF(p) do { \ 566 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 567 (p)->refcnt--; \ 568 REFLOG("SP_DELREF", (p), __func__, __LINE__); \ 569 } while (0) 570 #define SP_DELREF2(p, where, tag) do { \ 571 KASSERTMSG((p)->refcnt > 0, "SP refcnt underflow"); \ 572 (p)->refcnt--; \ 573 REFLOG("SP_DELREF", (p), (where), (tag)); \ 574 } while (0) 575 576 577 static inline void 578 key_sp_dead(struct secpolicy *sp) 579 { 580 581 /* mark the SP dead */ 582 sp->state = IPSEC_SPSTATE_DEAD; 583 } 584 585 static void 586 key_sp_unlink(struct secpolicy *sp) 587 { 588 589 /* remove from SP index */ 590 if (__LIST_CHAINED(sp)) { 591 LIST_REMOVE(sp, chain); 592 /* Release refcount held just for being on chain */ 593 KEY_FREESP(&sp); 594 } 595 } 596 597 598 /* 599 * Return 0 when there are known to be no SP's for the specified 600 * direction. Otherwise return 1. This is used by IPsec code 601 * to optimize performance. 602 */ 603 int 604 key_havesp(u_int dir) 605 { 606 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 607 !LIST_EMPTY(&sptree[dir]) : 1); 608 } 609 610 /* %%% IPsec policy management */ 611 /* 612 * allocating a SP for OUTBOUND or INBOUND packet. 613 * Must call key_freesp() later. 614 * OUT: NULL: not found 615 * others: found and return the pointer. 616 */ 617 struct secpolicy * 618 key_allocsp(const struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 619 { 620 struct secpolicy *sp; 621 int s; 622 623 KASSERT(spidx != NULL); 624 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 625 626 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 627 628 /* get a SP entry */ 629 s = splsoftnet(); /*called from softclock()*/ 630 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 631 printf("*** objects\n"); 632 kdebug_secpolicyindex(spidx); 633 } 634 635 LIST_FOREACH(sp, &sptree[dir], chain) { 636 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 637 printf("*** in SPD\n"); 638 kdebug_secpolicyindex(&sp->spidx); 639 } 640 641 if (sp->state == IPSEC_SPSTATE_DEAD) 642 continue; 643 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 644 goto found; 645 } 646 sp = NULL; 647 found: 648 if (sp) { 649 /* sanity check */ 650 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 651 652 /* found a SPD entry */ 653 sp->lastused = time_uptime; 654 SP_ADDREF2(sp, where, tag); 655 } 656 splx(s); 657 658 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 659 "DP return SP:%p (ID=%u) refcnt %u\n", 660 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 661 return sp; 662 } 663 664 /* 665 * allocating a SP for OUTBOUND or INBOUND packet. 666 * Must call key_freesp() later. 667 * OUT: NULL: not found 668 * others: found and return the pointer. 669 */ 670 struct secpolicy * 671 key_allocsp2(u_int32_t spi, 672 const union sockaddr_union *dst, 673 u_int8_t proto, 674 u_int dir, 675 const char* where, int tag) 676 { 677 struct secpolicy *sp; 678 int s; 679 680 KASSERT(dst != NULL); 681 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 682 683 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 684 685 /* get a SP entry */ 686 s = splsoftnet(); /*called from softclock()*/ 687 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 688 printf("*** objects\n"); 689 printf("spi %u proto %u dir %u\n", spi, proto, dir); 690 kdebug_sockaddr(&dst->sa); 691 } 692 693 LIST_FOREACH(sp, &sptree[dir], chain) { 694 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 695 printf("*** in SPD\n"); 696 kdebug_secpolicyindex(&sp->spidx); 697 } 698 699 if (sp->state == IPSEC_SPSTATE_DEAD) 700 continue; 701 /* compare simple values, then dst address */ 702 if (sp->spidx.ul_proto != proto) 703 continue; 704 /* NB: spi's must exist and match */ 705 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 706 continue; 707 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, PORT_STRICT) == 0) 708 goto found; 709 } 710 sp = NULL; 711 found: 712 if (sp) { 713 /* sanity check */ 714 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 715 716 /* found a SPD entry */ 717 sp->lastused = time_uptime; 718 SP_ADDREF2(sp, where, tag); 719 } 720 splx(s); 721 722 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 723 "DP return SP:%p (ID=%u) refcnt %u\n", 724 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 725 return sp; 726 } 727 728 /* 729 * return a policy that matches this particular inbound packet. 730 * XXX slow 731 */ 732 struct secpolicy * 733 key_gettunnel(const struct sockaddr *osrc, 734 const struct sockaddr *odst, 735 const struct sockaddr *isrc, 736 const struct sockaddr *idst, 737 const char* where, int tag) 738 { 739 struct secpolicy *sp; 740 const int dir = IPSEC_DIR_INBOUND; 741 int s; 742 struct ipsecrequest *r1, *r2, *p; 743 struct secpolicyindex spidx; 744 745 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 746 747 if (isrc->sa_family != idst->sa_family) { 748 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 749 isrc->sa_family, idst->sa_family)); 750 sp = NULL; 751 goto done; 752 } 753 754 s = splsoftnet(); /*called from softclock()*/ 755 LIST_FOREACH(sp, &sptree[dir], chain) { 756 if (sp->state == IPSEC_SPSTATE_DEAD) 757 continue; 758 759 r1 = r2 = NULL; 760 for (p = sp->req; p; p = p->next) { 761 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 762 continue; 763 764 r1 = r2; 765 r2 = p; 766 767 if (!r1) { 768 /* here we look at address matches only */ 769 spidx = sp->spidx; 770 if (isrc->sa_len > sizeof(spidx.src) || 771 idst->sa_len > sizeof(spidx.dst)) 772 continue; 773 memcpy(&spidx.src, isrc, isrc->sa_len); 774 memcpy(&spidx.dst, idst, idst->sa_len); 775 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 776 continue; 777 } else { 778 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, PORT_NONE) || 779 key_sockaddrcmp(&r1->saidx.dst.sa, idst, PORT_NONE)) 780 continue; 781 } 782 783 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, PORT_NONE) || 784 key_sockaddrcmp(&r2->saidx.dst.sa, odst, PORT_NONE)) 785 continue; 786 787 goto found; 788 } 789 } 790 sp = NULL; 791 found: 792 if (sp) { 793 sp->lastused = time_uptime; 794 SP_ADDREF2(sp, where, tag); 795 } 796 splx(s); 797 done: 798 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 799 "DP return SP:%p (ID=%u) refcnt %u\n", 800 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0); 801 return sp; 802 } 803 804 /* 805 * allocating an SA entry for an *OUTBOUND* packet. 806 * checking each request entries in SP, and acquire an SA if need. 807 * OUT: 0: there are valid requests. 808 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 809 */ 810 int 811 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 812 { 813 u_int level; 814 int error; 815 816 KASSERT(isr != NULL); 817 KASSERT(saidx != NULL); 818 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 819 saidx->mode == IPSEC_MODE_TUNNEL, 820 "unexpected policy %u", saidx->mode); 821 822 /* get current level */ 823 level = ipsec_get_reqlevel(isr); 824 825 /* 826 * XXX guard against protocol callbacks from the crypto 827 * thread as they reference ipsecrequest.sav which we 828 * temporarily null out below. Need to rethink how we 829 * handle bundled SA's in the callback thread. 830 */ 831 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 832 #if 0 833 /* 834 * We do allocate new SA only if the state of SA in the holder is 835 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 836 */ 837 if (isr->sav != NULL) { 838 if (isr->sav->sah == NULL) 839 panic("key_checkrequest: sah is null"); 840 if (isr->sav == (struct secasvar *)LIST_FIRST( 841 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 842 KEY_FREESAV(&isr->sav); 843 isr->sav = NULL; 844 } 845 } 846 #else 847 /* 848 * we free any SA stashed in the IPsec request because a different 849 * SA may be involved each time this request is checked, either 850 * because new SAs are being configured, or this request is 851 * associated with an unconnected datagram socket, or this request 852 * is associated with a system default policy. 853 * 854 * The operation may have negative impact to performance. We may 855 * want to check cached SA carefully, rather than picking new SA 856 * every time. 857 */ 858 if (isr->sav != NULL) { 859 KEY_FREESAV(&isr->sav); 860 isr->sav = NULL; 861 } 862 #endif 863 864 /* 865 * new SA allocation if no SA found. 866 * key_allocsa_policy should allocate the oldest SA available. 867 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 868 */ 869 if (isr->sav == NULL) 870 isr->sav = key_allocsa_policy(saidx); 871 872 /* When there is SA. */ 873 if (isr->sav != NULL) { 874 if (isr->sav->state != SADB_SASTATE_MATURE && 875 isr->sav->state != SADB_SASTATE_DYING) 876 return EINVAL; 877 return 0; 878 } 879 880 /* there is no SA */ 881 error = key_acquire(saidx, isr->sp); 882 if (error != 0) { 883 /* XXX What should I do ? */ 884 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 885 "from key_acquire.\n", error)); 886 return error; 887 } 888 889 if (level != IPSEC_LEVEL_REQUIRE) { 890 /* XXX sigh, the interface to this routine is botched */ 891 KASSERTMSG(isr->sav == NULL, "unexpected SA"); 892 return 0; 893 } else { 894 return ENOENT; 895 } 896 } 897 898 /* 899 * allocating a SA for policy entry from SAD. 900 * NOTE: searching SAD of aliving state. 901 * OUT: NULL: not found. 902 * others: found and return the pointer. 903 */ 904 static struct secasvar * 905 key_allocsa_policy(const struct secasindex *saidx) 906 { 907 struct secashead *sah; 908 struct secasvar *sav; 909 u_int stateidx, state; 910 const u_int *saorder_state_valid; 911 int arraysize; 912 913 LIST_FOREACH(sah, &sahtree, chain) { 914 if (sah->state == SADB_SASTATE_DEAD) 915 continue; 916 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 917 goto found; 918 } 919 920 return NULL; 921 922 found: 923 924 /* 925 * search a valid state list for outbound packet. 926 * This search order is important. 927 */ 928 if (key_prefered_oldsa) { 929 saorder_state_valid = saorder_state_valid_prefer_old; 930 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 931 } else { 932 saorder_state_valid = saorder_state_valid_prefer_new; 933 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 934 } 935 936 /* search valid state */ 937 for (stateidx = 0; 938 stateidx < arraysize; 939 stateidx++) { 940 941 state = saorder_state_valid[stateidx]; 942 943 sav = key_do_allocsa_policy(sah, state); 944 if (sav != NULL) 945 return sav; 946 } 947 948 return NULL; 949 } 950 951 /* 952 * searching SAD with direction, protocol, mode and state. 953 * called by key_allocsa_policy(). 954 * OUT: 955 * NULL : not found 956 * others : found, pointer to a SA. 957 */ 958 static struct secasvar * 959 key_do_allocsa_policy(struct secashead *sah, u_int state) 960 { 961 struct secasvar *sav, *candidate, *d; 962 963 /* initilize */ 964 candidate = NULL; 965 966 LIST_FOREACH(sav, &sah->savtree[state], chain) { 967 /* sanity check */ 968 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 969 970 /* initialize */ 971 if (candidate == NULL) { 972 candidate = sav; 973 continue; 974 } 975 976 /* Which SA is the better ? */ 977 978 /* sanity check 2 */ 979 KASSERT(candidate->lft_c != NULL); 980 KASSERT(sav->lft_c != NULL); 981 982 /* What the best method is to compare ? */ 983 if (key_prefered_oldsa) { 984 if (candidate->lft_c->sadb_lifetime_addtime > 985 sav->lft_c->sadb_lifetime_addtime) { 986 candidate = sav; 987 } 988 continue; 989 /*NOTREACHED*/ 990 } 991 992 /* prefered new sa rather than old sa */ 993 if (candidate->lft_c->sadb_lifetime_addtime < 994 sav->lft_c->sadb_lifetime_addtime) { 995 d = candidate; 996 candidate = sav; 997 } else 998 d = sav; 999 1000 /* 1001 * prepared to delete the SA when there is more 1002 * suitable candidate and the lifetime of the SA is not 1003 * permanent. 1004 */ 1005 if (d->lft_c->sadb_lifetime_addtime != 0) { 1006 struct mbuf *m, *result = 0; 1007 uint8_t satype; 1008 1009 key_sa_chgstate(d, SADB_SASTATE_DEAD); 1010 1011 KASSERT(d->refcnt > 0); 1012 1013 satype = key_proto2satype(d->sah->saidx.proto); 1014 if (satype == 0) 1015 goto msgfail; 1016 1017 m = key_setsadbmsg(SADB_DELETE, 0, 1018 satype, 0, 0, d->refcnt - 1); 1019 if (!m) 1020 goto msgfail; 1021 result = m; 1022 1023 /* set sadb_address for saidx's. */ 1024 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1025 &d->sah->saidx.src.sa, 1026 d->sah->saidx.src.sa.sa_len << 3, 1027 IPSEC_ULPROTO_ANY); 1028 if (!m) 1029 goto msgfail; 1030 m_cat(result, m); 1031 1032 /* set sadb_address for saidx's. */ 1033 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1034 &d->sah->saidx.src.sa, 1035 d->sah->saidx.src.sa.sa_len << 3, 1036 IPSEC_ULPROTO_ANY); 1037 if (!m) 1038 goto msgfail; 1039 m_cat(result, m); 1040 1041 /* create SA extension */ 1042 m = key_setsadbsa(d); 1043 if (!m) 1044 goto msgfail; 1045 m_cat(result, m); 1046 1047 if (result->m_len < sizeof(struct sadb_msg)) { 1048 result = m_pullup(result, 1049 sizeof(struct sadb_msg)); 1050 if (result == NULL) 1051 goto msgfail; 1052 } 1053 1054 result->m_pkthdr.len = 0; 1055 for (m = result; m; m = m->m_next) 1056 result->m_pkthdr.len += m->m_len; 1057 mtod(result, struct sadb_msg *)->sadb_msg_len = 1058 PFKEY_UNIT64(result->m_pkthdr.len); 1059 1060 key_sendup_mbuf(NULL, result, 1061 KEY_SENDUP_REGISTERED); 1062 result = 0; 1063 msgfail: 1064 if (result) 1065 m_freem(result); 1066 KEY_FREESAV(&d); 1067 } 1068 } 1069 1070 if (candidate) { 1071 SA_ADDREF(candidate); 1072 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1073 "DP cause refcnt++:%d SA:%p\n", 1074 candidate->refcnt, candidate); 1075 } 1076 return candidate; 1077 } 1078 1079 /* 1080 * allocating a usable SA entry for a *INBOUND* packet. 1081 * Must call key_freesav() later. 1082 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1083 * NULL: not found, or error occurred. 1084 * 1085 * In the comparison, no source address is used--for RFC2401 conformance. 1086 * To quote, from section 4.1: 1087 * A security association is uniquely identified by a triple consisting 1088 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1089 * security protocol (AH or ESP) identifier. 1090 * Note that, however, we do need to keep source address in IPsec SA. 1091 * IKE specification and PF_KEY specification do assume that we 1092 * keep source address in IPsec SA. We see a tricky situation here. 1093 * 1094 * sport and dport are used for NAT-T. network order is always used. 1095 */ 1096 struct secasvar * 1097 key_allocsa( 1098 const union sockaddr_union *dst, 1099 u_int proto, 1100 u_int32_t spi, 1101 u_int16_t sport, 1102 u_int16_t dport, 1103 const char* where, int tag) 1104 { 1105 struct secashead *sah; 1106 struct secasvar *sav; 1107 u_int stateidx, state; 1108 const u_int *saorder_state_valid; 1109 int arraysize, chkport; 1110 int s; 1111 1112 int must_check_spi = 1; 1113 int must_check_alg = 0; 1114 u_int16_t cpi = 0; 1115 u_int8_t algo = 0; 1116 1117 if ((sport != 0) && (dport != 0)) 1118 chkport = PORT_STRICT; 1119 else 1120 chkport = PORT_NONE; 1121 1122 KASSERT(dst != NULL); 1123 1124 /* 1125 * XXX IPCOMP case 1126 * We use cpi to define spi here. In the case where cpi <= 1127 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1128 * the real spi. In this case, don't check the spi but check the 1129 * algorithm 1130 */ 1131 1132 if (proto == IPPROTO_IPCOMP) { 1133 u_int32_t tmp; 1134 tmp = ntohl(spi); 1135 cpi = (u_int16_t) tmp; 1136 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1137 algo = (u_int8_t) cpi; 1138 must_check_spi = 0; 1139 must_check_alg = 1; 1140 } 1141 } 1142 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1143 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1144 where, tag, must_check_spi, must_check_alg); 1145 1146 1147 /* 1148 * searching SAD. 1149 * XXX: to be checked internal IP header somewhere. Also when 1150 * IPsec tunnel packet is received. But ESP tunnel mode is 1151 * encrypted so we can't check internal IP header. 1152 */ 1153 s = splsoftnet(); /*called from softclock()*/ 1154 if (key_prefered_oldsa) { 1155 saorder_state_valid = saorder_state_valid_prefer_old; 1156 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1157 } else { 1158 saorder_state_valid = saorder_state_valid_prefer_new; 1159 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1160 } 1161 LIST_FOREACH(sah, &sahtree, chain) { 1162 /* search valid state */ 1163 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1164 state = saorder_state_valid[stateidx]; 1165 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1166 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1167 "try match spi %#x, %#x\n", 1168 ntohl(spi), ntohl(sav->spi)); 1169 /* sanity check */ 1170 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1171 /* do not return entries w/ unusable state */ 1172 if (sav->state != SADB_SASTATE_MATURE && 1173 sav->state != SADB_SASTATE_DYING) { 1174 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1175 "bad state %d\n", sav->state); 1176 continue; 1177 } 1178 if (proto != sav->sah->saidx.proto) { 1179 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1180 "proto fail %d != %d\n", 1181 proto, sav->sah->saidx.proto); 1182 continue; 1183 } 1184 if (must_check_spi && spi != sav->spi) { 1185 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1186 "spi fail %#x != %#x\n", 1187 ntohl(spi), ntohl(sav->spi)); 1188 continue; 1189 } 1190 /* XXX only on the ipcomp case */ 1191 if (must_check_alg && algo != sav->alg_comp) { 1192 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1193 "algo fail %d != %d\n", 1194 algo, sav->alg_comp); 1195 continue; 1196 } 1197 1198 #if 0 /* don't check src */ 1199 /* Fix port in src->sa */ 1200 1201 /* check src address */ 1202 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE) != 0) 1203 continue; 1204 #endif 1205 /* fix port of dst address XXX*/ 1206 key_porttosaddr(__UNCONST(dst), dport); 1207 /* check dst address */ 1208 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1209 continue; 1210 SA_ADDREF2(sav, where, tag); 1211 goto done; 1212 } 1213 } 1214 } 1215 sav = NULL; 1216 done: 1217 splx(s); 1218 1219 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1220 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1221 return sav; 1222 } 1223 1224 /* 1225 * Must be called after calling key_allocsp(). 1226 * For both the packet without socket and key_freeso(). 1227 */ 1228 void 1229 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1230 { 1231 struct secpolicy *sp = *spp; 1232 1233 KASSERT(sp != NULL); 1234 1235 SP_DELREF2(sp, where, tag); 1236 1237 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1238 "DP SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1239 sp, sp->id, where, tag, sp->refcnt); 1240 1241 if (sp->refcnt == 0) { 1242 *spp = NULL; 1243 key_delsp(sp); 1244 } 1245 } 1246 1247 /* 1248 * Must be called after calling key_allocsp(). 1249 * For the packet with socket. 1250 */ 1251 void 1252 key_freeso(struct socket *so) 1253 { 1254 /* sanity check */ 1255 KASSERT(so != NULL); 1256 1257 switch (so->so_proto->pr_domain->dom_family) { 1258 #ifdef INET 1259 case PF_INET: 1260 { 1261 struct inpcb *pcb = sotoinpcb(so); 1262 1263 /* Does it have a PCB ? */ 1264 if (pcb == NULL) 1265 return; 1266 1267 struct inpcbpolicy *sp = pcb->inp_sp; 1268 key_freesp_so(&sp->sp_in); 1269 key_freesp_so(&sp->sp_out); 1270 } 1271 break; 1272 #endif 1273 #ifdef INET6 1274 case PF_INET6: 1275 { 1276 #ifdef HAVE_NRL_INPCB 1277 struct inpcb *pcb = sotoinpcb(so); 1278 struct inpcbpolicy *sp = pcb->inp_sp; 1279 1280 /* Does it have a PCB ? */ 1281 if (pcb == NULL) 1282 return; 1283 key_freesp_so(&sp->sp_in); 1284 key_freesp_so(&sp->sp_out); 1285 #else 1286 struct in6pcb *pcb = sotoin6pcb(so); 1287 1288 /* Does it have a PCB ? */ 1289 if (pcb == NULL) 1290 return; 1291 key_freesp_so(&pcb->in6p_sp->sp_in); 1292 key_freesp_so(&pcb->in6p_sp->sp_out); 1293 #endif 1294 } 1295 break; 1296 #endif /* INET6 */ 1297 default: 1298 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1299 so->so_proto->pr_domain->dom_family)); 1300 return; 1301 } 1302 } 1303 1304 static void 1305 key_freesp_so(struct secpolicy **sp) 1306 { 1307 1308 KASSERT(sp != NULL); 1309 KASSERT(*sp != NULL); 1310 1311 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1312 (*sp)->policy == IPSEC_POLICY_BYPASS) 1313 return; 1314 1315 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1316 "invalid policy %u", (*sp)->policy); 1317 KEY_FREESP(sp); 1318 } 1319 1320 /* 1321 * Must be called after calling key_allocsa(). 1322 * This function is called by key_freesp() to free some SA allocated 1323 * for a policy. 1324 */ 1325 void 1326 key_freesav(struct secasvar **psav, const char* where, int tag) 1327 { 1328 struct secasvar *sav = *psav; 1329 1330 KASSERT(sav != NULL); 1331 1332 SA_DELREF2(sav, where, tag); 1333 1334 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1335 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1336 sav, (u_long)ntohl(sav->spi), where, tag, sav->refcnt); 1337 1338 if (sav->refcnt == 0) { 1339 *psav = NULL; 1340 key_delsav(sav); 1341 } 1342 } 1343 1344 /* %%% SPD management */ 1345 /* 1346 * free security policy entry. 1347 */ 1348 static void 1349 key_delsp(struct secpolicy *sp) 1350 { 1351 int s; 1352 1353 KASSERT(sp != NULL); 1354 1355 key_sp_dead(sp); 1356 1357 KASSERTMSG(sp->refcnt == 0, 1358 "SP with references deleted (refcnt %u)", sp->refcnt); 1359 1360 s = splsoftnet(); /*called from softclock()*/ 1361 1362 { 1363 struct ipsecrequest *isr = sp->req, *nextisr; 1364 1365 while (isr != NULL) { 1366 if (isr->sav != NULL) { 1367 KEY_FREESAV(&isr->sav); 1368 isr->sav = NULL; 1369 } 1370 1371 nextisr = isr->next; 1372 kmem_intr_free(isr, sizeof(*isr)); 1373 isr = nextisr; 1374 } 1375 } 1376 1377 kmem_intr_free(sp, sizeof(*sp)); 1378 1379 splx(s); 1380 } 1381 1382 /* 1383 * search SPD 1384 * OUT: NULL : not found 1385 * others : found, pointer to a SP. 1386 */ 1387 static struct secpolicy * 1388 key_getsp(const struct secpolicyindex *spidx) 1389 { 1390 struct secpolicy *sp; 1391 1392 KASSERT(spidx != NULL); 1393 1394 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1395 if (sp->state == IPSEC_SPSTATE_DEAD) 1396 continue; 1397 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1398 SP_ADDREF(sp); 1399 return sp; 1400 } 1401 } 1402 1403 return NULL; 1404 } 1405 1406 /* 1407 * get SP by index. 1408 * OUT: NULL : not found 1409 * others : found, pointer to a SP. 1410 */ 1411 static struct secpolicy * 1412 key_getspbyid(u_int32_t id) 1413 { 1414 struct secpolicy *sp; 1415 1416 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1417 if (sp->state == IPSEC_SPSTATE_DEAD) 1418 continue; 1419 if (sp->id == id) { 1420 SP_ADDREF(sp); 1421 return sp; 1422 } 1423 } 1424 1425 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1426 if (sp->state == IPSEC_SPSTATE_DEAD) 1427 continue; 1428 if (sp->id == id) { 1429 SP_ADDREF(sp); 1430 return sp; 1431 } 1432 } 1433 1434 return NULL; 1435 } 1436 1437 struct secpolicy * 1438 key_newsp(const char* where, int tag) 1439 { 1440 struct secpolicy *newsp = NULL; 1441 1442 newsp = kmem_intr_zalloc(sizeof(struct secpolicy), KM_NOSLEEP); 1443 if (newsp != NULL) 1444 newsp->refcnt = 1; 1445 1446 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1447 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1448 return newsp; 1449 } 1450 1451 /* 1452 * create secpolicy structure from sadb_x_policy structure. 1453 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1454 * so must be set properly later. 1455 */ 1456 struct secpolicy * 1457 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1458 { 1459 struct secpolicy *newsp; 1460 1461 KASSERT(!cpu_softintr_p()); 1462 KASSERT(xpl0 != NULL); 1463 KASSERT(len >= sizeof(*xpl0)); 1464 1465 if (len != PFKEY_EXTLEN(xpl0)) { 1466 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1467 *error = EINVAL; 1468 return NULL; 1469 } 1470 1471 if ((newsp = KEY_NEWSP()) == NULL) { 1472 *error = ENOBUFS; 1473 return NULL; 1474 } 1475 1476 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1477 newsp->policy = xpl0->sadb_x_policy_type; 1478 1479 /* check policy */ 1480 switch (xpl0->sadb_x_policy_type) { 1481 case IPSEC_POLICY_DISCARD: 1482 case IPSEC_POLICY_NONE: 1483 case IPSEC_POLICY_ENTRUST: 1484 case IPSEC_POLICY_BYPASS: 1485 newsp->req = NULL; 1486 *error = 0; 1487 return newsp; 1488 1489 case IPSEC_POLICY_IPSEC: 1490 /* Continued */ 1491 break; 1492 default: 1493 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1494 KEY_FREESP(&newsp); 1495 *error = EINVAL; 1496 return NULL; 1497 } 1498 1499 /* IPSEC_POLICY_IPSEC */ 1500 { 1501 int tlen; 1502 const struct sadb_x_ipsecrequest *xisr; 1503 uint16_t xisr_reqid; 1504 struct ipsecrequest **p_isr = &newsp->req; 1505 1506 /* validity check */ 1507 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1508 ipseclog((LOG_DEBUG, 1509 "key_msg2sp: Invalid msg length.\n")); 1510 *error = EINVAL; 1511 goto free_exit; 1512 } 1513 1514 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1515 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1516 1517 while (tlen > 0) { 1518 /* length check */ 1519 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1520 ipseclog((LOG_DEBUG, "key_msg2sp: " 1521 "invalid ipsecrequest length.\n")); 1522 *error = EINVAL; 1523 goto free_exit; 1524 } 1525 1526 /* allocate request buffer */ 1527 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1528 1529 /* set values */ 1530 (*p_isr)->next = NULL; 1531 1532 switch (xisr->sadb_x_ipsecrequest_proto) { 1533 case IPPROTO_ESP: 1534 case IPPROTO_AH: 1535 case IPPROTO_IPCOMP: 1536 break; 1537 default: 1538 ipseclog((LOG_DEBUG, 1539 "key_msg2sp: invalid proto type=%u\n", 1540 xisr->sadb_x_ipsecrequest_proto)); 1541 *error = EPROTONOSUPPORT; 1542 goto free_exit; 1543 } 1544 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1545 1546 switch (xisr->sadb_x_ipsecrequest_mode) { 1547 case IPSEC_MODE_TRANSPORT: 1548 case IPSEC_MODE_TUNNEL: 1549 break; 1550 case IPSEC_MODE_ANY: 1551 default: 1552 ipseclog((LOG_DEBUG, 1553 "key_msg2sp: invalid mode=%u\n", 1554 xisr->sadb_x_ipsecrequest_mode)); 1555 *error = EINVAL; 1556 goto free_exit; 1557 } 1558 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1559 1560 switch (xisr->sadb_x_ipsecrequest_level) { 1561 case IPSEC_LEVEL_DEFAULT: 1562 case IPSEC_LEVEL_USE: 1563 case IPSEC_LEVEL_REQUIRE: 1564 break; 1565 case IPSEC_LEVEL_UNIQUE: 1566 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1567 /* validity check */ 1568 /* 1569 * If range violation of reqid, kernel will 1570 * update it, don't refuse it. 1571 */ 1572 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1573 ipseclog((LOG_DEBUG, 1574 "key_msg2sp: reqid=%d range " 1575 "violation, updated by kernel.\n", 1576 xisr_reqid)); 1577 xisr_reqid = 0; 1578 } 1579 1580 /* allocate new reqid id if reqid is zero. */ 1581 if (xisr_reqid == 0) { 1582 u_int16_t reqid; 1583 if ((reqid = key_newreqid()) == 0) { 1584 *error = ENOBUFS; 1585 goto free_exit; 1586 } 1587 (*p_isr)->saidx.reqid = reqid; 1588 } else { 1589 /* set it for manual keying. */ 1590 (*p_isr)->saidx.reqid = xisr_reqid; 1591 } 1592 break; 1593 1594 default: 1595 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1596 xisr->sadb_x_ipsecrequest_level)); 1597 *error = EINVAL; 1598 goto free_exit; 1599 } 1600 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1601 1602 /* set IP addresses if there */ 1603 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1604 const struct sockaddr *paddr; 1605 1606 paddr = (const struct sockaddr *)(xisr + 1); 1607 1608 /* validity check */ 1609 if (paddr->sa_len 1610 > sizeof((*p_isr)->saidx.src)) { 1611 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1612 "address length.\n")); 1613 *error = EINVAL; 1614 goto free_exit; 1615 } 1616 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1617 1618 paddr = (const struct sockaddr *)((const char *)paddr 1619 + paddr->sa_len); 1620 1621 /* validity check */ 1622 if (paddr->sa_len 1623 > sizeof((*p_isr)->saidx.dst)) { 1624 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1625 "address length.\n")); 1626 *error = EINVAL; 1627 goto free_exit; 1628 } 1629 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1630 } 1631 1632 (*p_isr)->sav = NULL; 1633 (*p_isr)->sp = newsp; 1634 1635 /* initialization for the next. */ 1636 p_isr = &(*p_isr)->next; 1637 tlen -= xisr->sadb_x_ipsecrequest_len; 1638 1639 /* validity check */ 1640 if (tlen < 0) { 1641 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1642 *error = EINVAL; 1643 goto free_exit; 1644 } 1645 1646 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr 1647 + xisr->sadb_x_ipsecrequest_len); 1648 } 1649 } 1650 1651 *error = 0; 1652 return newsp; 1653 1654 free_exit: 1655 KEY_FREESP(&newsp); 1656 return NULL; 1657 } 1658 1659 static u_int16_t 1660 key_newreqid(void) 1661 { 1662 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1663 1664 auto_reqid = (auto_reqid == 0xffff 1665 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1666 1667 /* XXX should be unique check */ 1668 1669 return auto_reqid; 1670 } 1671 1672 /* 1673 * copy secpolicy struct to sadb_x_policy structure indicated. 1674 */ 1675 struct mbuf * 1676 key_sp2msg(const struct secpolicy *sp) 1677 { 1678 struct sadb_x_policy *xpl; 1679 int tlen; 1680 char *p; 1681 struct mbuf *m; 1682 1683 KASSERT(sp != NULL); 1684 1685 tlen = key_getspreqmsglen(sp); 1686 1687 m = key_alloc_mbuf(tlen); 1688 if (!m || m->m_next) { /*XXX*/ 1689 if (m) 1690 m_freem(m); 1691 return NULL; 1692 } 1693 1694 m->m_len = tlen; 1695 m->m_next = NULL; 1696 xpl = mtod(m, struct sadb_x_policy *); 1697 memset(xpl, 0, tlen); 1698 1699 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1700 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1701 xpl->sadb_x_policy_type = sp->policy; 1702 xpl->sadb_x_policy_dir = sp->spidx.dir; 1703 xpl->sadb_x_policy_id = sp->id; 1704 p = (char *)xpl + sizeof(*xpl); 1705 1706 /* if is the policy for ipsec ? */ 1707 if (sp->policy == IPSEC_POLICY_IPSEC) { 1708 struct sadb_x_ipsecrequest *xisr; 1709 struct ipsecrequest *isr; 1710 1711 for (isr = sp->req; isr != NULL; isr = isr->next) { 1712 1713 xisr = (struct sadb_x_ipsecrequest *)p; 1714 1715 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1716 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1717 xisr->sadb_x_ipsecrequest_level = isr->level; 1718 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1719 1720 p += sizeof(*xisr); 1721 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1722 p += isr->saidx.src.sa.sa_len; 1723 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1724 p += isr->saidx.src.sa.sa_len; 1725 1726 xisr->sadb_x_ipsecrequest_len = 1727 PFKEY_ALIGN8(sizeof(*xisr) 1728 + isr->saidx.src.sa.sa_len 1729 + isr->saidx.dst.sa.sa_len); 1730 } 1731 } 1732 1733 return m; 1734 } 1735 1736 /* m will not be freed nor modified */ 1737 static struct mbuf * 1738 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1739 int ndeep, int nitem, ...) 1740 { 1741 va_list ap; 1742 int idx; 1743 int i; 1744 struct mbuf *result = NULL, *n; 1745 int len; 1746 1747 KASSERT(m != NULL); 1748 KASSERT(mhp != NULL); 1749 1750 va_start(ap, nitem); 1751 for (i = 0; i < nitem; i++) { 1752 idx = va_arg(ap, int); 1753 if (idx < 0 || idx > SADB_EXT_MAX) 1754 goto fail; 1755 /* don't attempt to pull empty extension */ 1756 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1757 continue; 1758 if (idx != SADB_EXT_RESERVED && 1759 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1760 continue; 1761 1762 if (idx == SADB_EXT_RESERVED) { 1763 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1764 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1765 MGETHDR(n, M_DONTWAIT, MT_DATA); 1766 if (!n) 1767 goto fail; 1768 n->m_len = len; 1769 n->m_next = NULL; 1770 m_copydata(m, 0, sizeof(struct sadb_msg), 1771 mtod(n, void *)); 1772 } else if (i < ndeep) { 1773 len = mhp->extlen[idx]; 1774 n = key_alloc_mbuf(len); 1775 if (!n || n->m_next) { /*XXX*/ 1776 if (n) 1777 m_freem(n); 1778 goto fail; 1779 } 1780 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1781 mtod(n, void *)); 1782 } else { 1783 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1784 M_DONTWAIT); 1785 } 1786 if (n == NULL) 1787 goto fail; 1788 1789 if (result) 1790 m_cat(result, n); 1791 else 1792 result = n; 1793 } 1794 va_end(ap); 1795 1796 if (result && (result->m_flags & M_PKTHDR) != 0) { 1797 result->m_pkthdr.len = 0; 1798 for (n = result; n; n = n->m_next) 1799 result->m_pkthdr.len += n->m_len; 1800 } 1801 1802 return result; 1803 1804 fail: 1805 va_end(ap); 1806 m_freem(result); 1807 return NULL; 1808 } 1809 1810 /* 1811 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1812 * add an entry to SP database, when received 1813 * <base, address(SD), (lifetime(H),) policy> 1814 * from the user(?). 1815 * Adding to SP database, 1816 * and send 1817 * <base, address(SD), (lifetime(H),) policy> 1818 * to the socket which was send. 1819 * 1820 * SPDADD set a unique policy entry. 1821 * SPDSETIDX like SPDADD without a part of policy requests. 1822 * SPDUPDATE replace a unique policy entry. 1823 * 1824 * m will always be freed. 1825 */ 1826 static int 1827 key_spdadd(struct socket *so, struct mbuf *m, 1828 const struct sadb_msghdr *mhp) 1829 { 1830 const struct sadb_address *src0, *dst0; 1831 const struct sadb_x_policy *xpl0; 1832 struct sadb_x_policy *xpl; 1833 const struct sadb_lifetime *lft = NULL; 1834 struct secpolicyindex spidx; 1835 struct secpolicy *newsp; 1836 int error; 1837 1838 KASSERT(!cpu_softintr_p()); 1839 KASSERT(so != NULL); 1840 KASSERT(m != NULL); 1841 KASSERT(mhp != NULL); 1842 KASSERT(mhp->msg != NULL); 1843 1844 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1845 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1846 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1847 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1848 return key_senderror(so, m, EINVAL); 1849 } 1850 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1851 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1852 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1853 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1854 return key_senderror(so, m, EINVAL); 1855 } 1856 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1857 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1858 < sizeof(struct sadb_lifetime)) { 1859 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1860 return key_senderror(so, m, EINVAL); 1861 } 1862 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1863 } 1864 1865 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1866 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1867 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1868 1869 /* make secindex */ 1870 /* XXX boundary check against sa_len */ 1871 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1872 src0 + 1, 1873 dst0 + 1, 1874 src0->sadb_address_prefixlen, 1875 dst0->sadb_address_prefixlen, 1876 src0->sadb_address_proto, 1877 &spidx); 1878 1879 /* checking the direciton. */ 1880 switch (xpl0->sadb_x_policy_dir) { 1881 case IPSEC_DIR_INBOUND: 1882 case IPSEC_DIR_OUTBOUND: 1883 break; 1884 default: 1885 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1886 mhp->msg->sadb_msg_errno = EINVAL; 1887 return 0; 1888 } 1889 1890 /* check policy */ 1891 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1892 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1893 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1894 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1895 return key_senderror(so, m, EINVAL); 1896 } 1897 1898 /* policy requests are mandatory when action is ipsec. */ 1899 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 1900 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 1901 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1902 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1903 return key_senderror(so, m, EINVAL); 1904 } 1905 1906 /* 1907 * checking there is SP already or not. 1908 * SPDUPDATE doesn't depend on whether there is a SP or not. 1909 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1910 * then error. 1911 */ 1912 newsp = key_getsp(&spidx); 1913 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1914 if (newsp) { 1915 key_sp_dead(newsp); 1916 key_sp_unlink(newsp); /* XXX jrs ordering */ 1917 KEY_FREESP(&newsp); 1918 newsp = NULL; 1919 } 1920 } else { 1921 if (newsp != NULL) { 1922 KEY_FREESP(&newsp); 1923 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1924 return key_senderror(so, m, EEXIST); 1925 } 1926 } 1927 1928 /* allocation new SP entry */ 1929 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1930 return key_senderror(so, m, error); 1931 } 1932 1933 if ((newsp->id = key_getnewspid()) == 0) { 1934 kmem_free(newsp, sizeof(*newsp)); 1935 return key_senderror(so, m, ENOBUFS); 1936 } 1937 1938 /* XXX boundary check against sa_len */ 1939 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1940 src0 + 1, 1941 dst0 + 1, 1942 src0->sadb_address_prefixlen, 1943 dst0->sadb_address_prefixlen, 1944 src0->sadb_address_proto, 1945 &newsp->spidx); 1946 1947 /* sanity check on addr pair */ 1948 if (((const struct sockaddr *)(src0 + 1))->sa_family != 1949 ((const struct sockaddr *)(dst0+ 1))->sa_family) { 1950 kmem_free(newsp, sizeof(*newsp)); 1951 return key_senderror(so, m, EINVAL); 1952 } 1953 if (((const struct sockaddr *)(src0 + 1))->sa_len != 1954 ((const struct sockaddr *)(dst0+ 1))->sa_len) { 1955 kmem_free(newsp, sizeof(*newsp)); 1956 return key_senderror(so, m, EINVAL); 1957 } 1958 1959 newsp->created = time_uptime; 1960 newsp->lastused = newsp->created; 1961 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1962 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1963 1964 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1965 newsp->state = IPSEC_SPSTATE_ALIVE; 1966 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1967 1968 /* delete the entry in spacqtree */ 1969 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1970 struct secspacq *spacq; 1971 if ((spacq = key_getspacq(&spidx)) != NULL) { 1972 /* reset counter in order to deletion by timehandler. */ 1973 spacq->created = time_uptime; 1974 spacq->count = 0; 1975 } 1976 } 1977 1978 /* Invalidate all cached SPD pointers in the PCBs. */ 1979 ipsec_invalpcbcacheall(); 1980 1981 #if defined(GATEWAY) 1982 /* Invalidate the ipflow cache, as well. */ 1983 ipflow_invalidate_all(0); 1984 #ifdef INET6 1985 if (in6_present) 1986 ip6flow_invalidate_all(0); 1987 #endif /* INET6 */ 1988 #endif /* GATEWAY */ 1989 1990 { 1991 struct mbuf *n, *mpolicy; 1992 struct sadb_msg *newmsg; 1993 int off; 1994 1995 /* create new sadb_msg to reply. */ 1996 if (lft) { 1997 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1998 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1999 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2000 } else { 2001 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2002 SADB_X_EXT_POLICY, 2003 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2004 } 2005 if (!n) 2006 return key_senderror(so, m, ENOBUFS); 2007 2008 if (n->m_len < sizeof(*newmsg)) { 2009 n = m_pullup(n, sizeof(*newmsg)); 2010 if (!n) 2011 return key_senderror(so, m, ENOBUFS); 2012 } 2013 newmsg = mtod(n, struct sadb_msg *); 2014 newmsg->sadb_msg_errno = 0; 2015 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2016 2017 off = 0; 2018 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2019 sizeof(*xpl), &off); 2020 if (mpolicy == NULL) { 2021 /* n is already freed */ 2022 return key_senderror(so, m, ENOBUFS); 2023 } 2024 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2025 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2026 m_freem(n); 2027 return key_senderror(so, m, EINVAL); 2028 } 2029 xpl->sadb_x_policy_id = newsp->id; 2030 2031 m_freem(m); 2032 key_update_used(); 2033 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2034 } 2035 } 2036 2037 /* 2038 * get new policy id. 2039 * OUT: 2040 * 0: failure. 2041 * others: success. 2042 */ 2043 static u_int32_t 2044 key_getnewspid(void) 2045 { 2046 u_int32_t newid = 0; 2047 int count = key_spi_trycnt; /* XXX */ 2048 struct secpolicy *sp; 2049 2050 /* when requesting to allocate spi ranged */ 2051 while (count--) { 2052 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2053 2054 if ((sp = key_getspbyid(newid)) == NULL) 2055 break; 2056 2057 KEY_FREESP(&sp); 2058 } 2059 2060 if (count == 0 || newid == 0) { 2061 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2062 return 0; 2063 } 2064 2065 return newid; 2066 } 2067 2068 /* 2069 * SADB_SPDDELETE processing 2070 * receive 2071 * <base, address(SD), policy(*)> 2072 * from the user(?), and set SADB_SASTATE_DEAD, 2073 * and send, 2074 * <base, address(SD), policy(*)> 2075 * to the ikmpd. 2076 * policy(*) including direction of policy. 2077 * 2078 * m will always be freed. 2079 */ 2080 static int 2081 key_spddelete(struct socket *so, struct mbuf *m, 2082 const struct sadb_msghdr *mhp) 2083 { 2084 struct sadb_address *src0, *dst0; 2085 struct sadb_x_policy *xpl0; 2086 struct secpolicyindex spidx; 2087 struct secpolicy *sp; 2088 2089 KASSERT(so != NULL); 2090 KASSERT(m != NULL); 2091 KASSERT(mhp != NULL); 2092 KASSERT(mhp->msg != NULL); 2093 2094 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2095 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2096 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2097 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2098 return key_senderror(so, m, EINVAL); 2099 } 2100 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2101 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2102 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2103 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2104 return key_senderror(so, m, EINVAL); 2105 } 2106 2107 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2108 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2109 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2110 2111 /* make secindex */ 2112 /* XXX boundary check against sa_len */ 2113 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2114 src0 + 1, 2115 dst0 + 1, 2116 src0->sadb_address_prefixlen, 2117 dst0->sadb_address_prefixlen, 2118 src0->sadb_address_proto, 2119 &spidx); 2120 2121 /* checking the direciton. */ 2122 switch (xpl0->sadb_x_policy_dir) { 2123 case IPSEC_DIR_INBOUND: 2124 case IPSEC_DIR_OUTBOUND: 2125 break; 2126 default: 2127 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2128 return key_senderror(so, m, EINVAL); 2129 } 2130 2131 /* Is there SP in SPD ? */ 2132 if ((sp = key_getsp(&spidx)) == NULL) { 2133 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2134 return key_senderror(so, m, EINVAL); 2135 } 2136 2137 /* save policy id to buffer to be returned. */ 2138 xpl0->sadb_x_policy_id = sp->id; 2139 2140 key_sp_dead(sp); 2141 key_sp_unlink(sp); /* XXX jrs ordering */ 2142 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2143 2144 /* Invalidate all cached SPD pointers in the PCBs. */ 2145 ipsec_invalpcbcacheall(); 2146 2147 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2148 2149 { 2150 struct mbuf *n; 2151 struct sadb_msg *newmsg; 2152 2153 /* create new sadb_msg to reply. */ 2154 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2155 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2156 if (!n) 2157 return key_senderror(so, m, ENOBUFS); 2158 2159 newmsg = mtod(n, struct sadb_msg *); 2160 newmsg->sadb_msg_errno = 0; 2161 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2162 2163 m_freem(m); 2164 key_update_used(); 2165 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2166 } 2167 } 2168 2169 /* 2170 * SADB_SPDDELETE2 processing 2171 * receive 2172 * <base, policy(*)> 2173 * from the user(?), and set SADB_SASTATE_DEAD, 2174 * and send, 2175 * <base, policy(*)> 2176 * to the ikmpd. 2177 * policy(*) including direction of policy. 2178 * 2179 * m will always be freed. 2180 */ 2181 static int 2182 key_spddelete2(struct socket *so, struct mbuf *m, 2183 const struct sadb_msghdr *mhp) 2184 { 2185 u_int32_t id; 2186 struct secpolicy *sp; 2187 2188 KASSERT(so != NULL); 2189 KASSERT(m != NULL); 2190 KASSERT(mhp != NULL); 2191 KASSERT(mhp->msg != NULL); 2192 2193 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2194 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2195 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2196 key_senderror(so, m, EINVAL); 2197 return 0; 2198 } 2199 2200 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2201 2202 /* Is there SP in SPD ? */ 2203 if ((sp = key_getspbyid(id)) == NULL) { 2204 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2205 return key_senderror(so, m, EINVAL); 2206 } 2207 2208 key_sp_dead(sp); 2209 key_sp_unlink(sp); /* XXX jrs ordering */ 2210 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2211 sp = NULL; 2212 2213 /* Invalidate all cached SPD pointers in the PCBs. */ 2214 ipsec_invalpcbcacheall(); 2215 2216 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2217 2218 { 2219 struct mbuf *n, *nn; 2220 struct sadb_msg *newmsg; 2221 int off, len; 2222 2223 /* create new sadb_msg to reply. */ 2224 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2225 2226 if (len > MCLBYTES) 2227 return key_senderror(so, m, ENOBUFS); 2228 MGETHDR(n, M_DONTWAIT, MT_DATA); 2229 if (n && len > MHLEN) { 2230 MCLGET(n, M_DONTWAIT); 2231 if ((n->m_flags & M_EXT) == 0) { 2232 m_freem(n); 2233 n = NULL; 2234 } 2235 } 2236 if (!n) 2237 return key_senderror(so, m, ENOBUFS); 2238 2239 n->m_len = len; 2240 n->m_next = NULL; 2241 off = 0; 2242 2243 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2244 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2245 2246 KASSERTMSG(off == len, "length inconsistency"); 2247 2248 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2249 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2250 if (!n->m_next) { 2251 m_freem(n); 2252 return key_senderror(so, m, ENOBUFS); 2253 } 2254 2255 n->m_pkthdr.len = 0; 2256 for (nn = n; nn; nn = nn->m_next) 2257 n->m_pkthdr.len += nn->m_len; 2258 2259 newmsg = mtod(n, struct sadb_msg *); 2260 newmsg->sadb_msg_errno = 0; 2261 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2262 2263 m_freem(m); 2264 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2265 } 2266 } 2267 2268 /* 2269 * SADB_X_GET processing 2270 * receive 2271 * <base, policy(*)> 2272 * from the user(?), 2273 * and send, 2274 * <base, address(SD), policy> 2275 * to the ikmpd. 2276 * policy(*) including direction of policy. 2277 * 2278 * m will always be freed. 2279 */ 2280 static int 2281 key_spdget(struct socket *so, struct mbuf *m, 2282 const struct sadb_msghdr *mhp) 2283 { 2284 u_int32_t id; 2285 struct secpolicy *sp; 2286 struct mbuf *n; 2287 2288 KASSERT(so != NULL); 2289 KASSERT(m != NULL); 2290 KASSERT(mhp != NULL); 2291 KASSERT(mhp->msg != NULL); 2292 2293 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2294 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2295 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2296 return key_senderror(so, m, EINVAL); 2297 } 2298 2299 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2300 2301 /* Is there SP in SPD ? */ 2302 if ((sp = key_getspbyid(id)) == NULL) { 2303 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2304 return key_senderror(so, m, ENOENT); 2305 } 2306 2307 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2308 mhp->msg->sadb_msg_pid); 2309 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2310 if (n != NULL) { 2311 m_freem(m); 2312 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2313 } else 2314 return key_senderror(so, m, ENOBUFS); 2315 } 2316 2317 /* 2318 * SADB_X_SPDACQUIRE processing. 2319 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2320 * send 2321 * <base, policy(*)> 2322 * to KMD, and expect to receive 2323 * <base> with SADB_X_SPDACQUIRE if error occurred, 2324 * or 2325 * <base, policy> 2326 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2327 * policy(*) is without policy requests. 2328 * 2329 * 0 : succeed 2330 * others: error number 2331 */ 2332 int 2333 key_spdacquire(const struct secpolicy *sp) 2334 { 2335 struct mbuf *result = NULL, *m; 2336 struct secspacq *newspacq; 2337 int error; 2338 2339 KASSERT(sp != NULL); 2340 KASSERTMSG(sp->req == NULL, "called but there is request"); 2341 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2342 "policy mismathed. IPsec is expected"); 2343 2344 /* Get an entry to check whether sent message or not. */ 2345 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2346 if (key_blockacq_count < newspacq->count) { 2347 /* reset counter and do send message. */ 2348 newspacq->count = 0; 2349 } else { 2350 /* increment counter and do nothing. */ 2351 newspacq->count++; 2352 return 0; 2353 } 2354 } else { 2355 /* make new entry for blocking to send SADB_ACQUIRE. */ 2356 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2357 return ENOBUFS; 2358 2359 /* add to acqtree */ 2360 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2361 } 2362 2363 /* create new sadb_msg to reply. */ 2364 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2365 if (!m) { 2366 error = ENOBUFS; 2367 goto fail; 2368 } 2369 result = m; 2370 2371 result->m_pkthdr.len = 0; 2372 for (m = result; m; m = m->m_next) 2373 result->m_pkthdr.len += m->m_len; 2374 2375 mtod(result, struct sadb_msg *)->sadb_msg_len = 2376 PFKEY_UNIT64(result->m_pkthdr.len); 2377 2378 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2379 2380 fail: 2381 if (result) 2382 m_freem(result); 2383 return error; 2384 } 2385 2386 /* 2387 * SADB_SPDFLUSH processing 2388 * receive 2389 * <base> 2390 * from the user, and free all entries in secpctree. 2391 * and send, 2392 * <base> 2393 * to the user. 2394 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2395 * 2396 * m will always be freed. 2397 */ 2398 static int 2399 key_spdflush(struct socket *so, struct mbuf *m, 2400 const struct sadb_msghdr *mhp) 2401 { 2402 struct sadb_msg *newmsg; 2403 struct secpolicy *sp; 2404 u_int dir; 2405 2406 KASSERT(so != NULL); 2407 KASSERT(m != NULL); 2408 KASSERT(mhp != NULL); 2409 KASSERT(mhp->msg != NULL); 2410 2411 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2412 return key_senderror(so, m, EINVAL); 2413 2414 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2415 struct secpolicy * nextsp; 2416 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 2417 if (sp->state == IPSEC_SPSTATE_DEAD) 2418 continue; 2419 key_sp_dead(sp); 2420 key_sp_unlink(sp); 2421 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2422 continue; 2423 } 2424 } 2425 2426 /* Invalidate all cached SPD pointers in the PCBs. */ 2427 ipsec_invalpcbcacheall(); 2428 2429 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2430 2431 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2432 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2433 return key_senderror(so, m, ENOBUFS); 2434 } 2435 2436 if (m->m_next) 2437 m_freem(m->m_next); 2438 m->m_next = NULL; 2439 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2440 newmsg = mtod(m, struct sadb_msg *); 2441 newmsg->sadb_msg_errno = 0; 2442 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2443 2444 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2445 } 2446 2447 static struct sockaddr key_src = { 2448 .sa_len = 2, 2449 .sa_family = PF_KEY, 2450 }; 2451 2452 static struct mbuf * 2453 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2454 { 2455 struct secpolicy *sp; 2456 int cnt; 2457 u_int dir; 2458 struct mbuf *m, *n, *prev; 2459 int totlen; 2460 2461 *lenp = 0; 2462 2463 /* search SPD entry and get buffer size. */ 2464 cnt = 0; 2465 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2466 LIST_FOREACH(sp, &sptree[dir], chain) { 2467 cnt++; 2468 } 2469 } 2470 2471 if (cnt == 0) { 2472 *errorp = ENOENT; 2473 return (NULL); 2474 } 2475 2476 m = NULL; 2477 prev = m; 2478 totlen = 0; 2479 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2480 LIST_FOREACH(sp, &sptree[dir], chain) { 2481 --cnt; 2482 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2483 2484 if (!n) { 2485 *errorp = ENOBUFS; 2486 if (m) m_freem(m); 2487 return (NULL); 2488 } 2489 2490 totlen += n->m_pkthdr.len; 2491 if (!m) { 2492 m = n; 2493 } else { 2494 prev->m_nextpkt = n; 2495 } 2496 prev = n; 2497 } 2498 } 2499 2500 *lenp = totlen; 2501 *errorp = 0; 2502 return (m); 2503 } 2504 2505 /* 2506 * SADB_SPDDUMP processing 2507 * receive 2508 * <base> 2509 * from the user, and dump all SP leaves 2510 * and send, 2511 * <base> ..... 2512 * to the ikmpd. 2513 * 2514 * m will always be freed. 2515 */ 2516 static int 2517 key_spddump(struct socket *so, struct mbuf *m0, 2518 const struct sadb_msghdr *mhp) 2519 { 2520 struct mbuf *n; 2521 int error, len; 2522 int ok, s; 2523 pid_t pid; 2524 2525 KASSERT(so != NULL); 2526 KASSERT(m0 != NULL); 2527 KASSERT(mhp != NULL); 2528 KASSERT(mhp->msg != NULL); 2529 2530 pid = mhp->msg->sadb_msg_pid; 2531 /* 2532 * If the requestor has insufficient socket-buffer space 2533 * for the entire chain, nobody gets any response to the DUMP. 2534 * XXX For now, only the requestor ever gets anything. 2535 * Moreover, if the requestor has any space at all, they receive 2536 * the entire chain, otherwise the request is refused with ENOBUFS. 2537 */ 2538 if (sbspace(&so->so_rcv) <= 0) { 2539 return key_senderror(so, m0, ENOBUFS); 2540 } 2541 2542 s = splsoftnet(); 2543 n = key_setspddump_chain(&error, &len, pid); 2544 splx(s); 2545 2546 if (n == NULL) { 2547 return key_senderror(so, m0, ENOENT); 2548 } 2549 { 2550 uint64_t *ps = PFKEY_STAT_GETREF(); 2551 ps[PFKEY_STAT_IN_TOTAL]++; 2552 ps[PFKEY_STAT_IN_BYTES] += len; 2553 PFKEY_STAT_PUTREF(); 2554 } 2555 2556 /* 2557 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2558 * The requestor receives either the entire chain, or an 2559 * error message with ENOBUFS. 2560 */ 2561 2562 /* 2563 * sbappendchainwith record takes the chain of entries, one 2564 * packet-record per SPD entry, prepends the key_src sockaddr 2565 * to each packet-record, links the sockaddr mbufs into a new 2566 * list of records, then appends the entire resulting 2567 * list to the requesting socket. 2568 */ 2569 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2570 n, SB_PRIO_ONESHOT_OVERFLOW); 2571 2572 if (!ok) { 2573 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2574 m_freem(n); 2575 return key_senderror(so, m0, ENOBUFS); 2576 } 2577 2578 m_freem(m0); 2579 return error; 2580 } 2581 2582 /* 2583 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2584 */ 2585 static int 2586 key_nat_map(struct socket *so, struct mbuf *m, 2587 const struct sadb_msghdr *mhp) 2588 { 2589 struct sadb_x_nat_t_type *type; 2590 struct sadb_x_nat_t_port *sport; 2591 struct sadb_x_nat_t_port *dport; 2592 struct sadb_address *iaddr, *raddr; 2593 struct sadb_x_nat_t_frag *frag; 2594 2595 KASSERT(so != NULL); 2596 KASSERT(m != NULL); 2597 KASSERT(mhp != NULL); 2598 KASSERT(mhp->msg != NULL); 2599 2600 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2601 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2602 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2603 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2604 return key_senderror(so, m, EINVAL); 2605 } 2606 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2607 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2608 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2609 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2610 return key_senderror(so, m, EINVAL); 2611 } 2612 2613 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2614 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2615 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2616 return key_senderror(so, m, EINVAL); 2617 } 2618 2619 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2620 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2621 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2622 return key_senderror(so, m, EINVAL); 2623 } 2624 2625 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2626 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2627 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2628 return key_senderror(so, m, EINVAL); 2629 } 2630 2631 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2632 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2633 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2634 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2635 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2636 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2637 2638 /* 2639 * XXX handle that, it should also contain a SA, or anything 2640 * that enable to update the SA information. 2641 */ 2642 2643 return 0; 2644 } 2645 2646 static struct mbuf * 2647 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2648 { 2649 struct mbuf *result = NULL, *m; 2650 2651 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2652 if (!m) 2653 goto fail; 2654 result = m; 2655 2656 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2657 &sp->spidx.src.sa, sp->spidx.prefs, 2658 sp->spidx.ul_proto); 2659 if (!m) 2660 goto fail; 2661 m_cat(result, m); 2662 2663 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2664 &sp->spidx.dst.sa, sp->spidx.prefd, 2665 sp->spidx.ul_proto); 2666 if (!m) 2667 goto fail; 2668 m_cat(result, m); 2669 2670 m = key_sp2msg(sp); 2671 if (!m) 2672 goto fail; 2673 m_cat(result, m); 2674 2675 if ((result->m_flags & M_PKTHDR) == 0) 2676 goto fail; 2677 2678 if (result->m_len < sizeof(struct sadb_msg)) { 2679 result = m_pullup(result, sizeof(struct sadb_msg)); 2680 if (result == NULL) 2681 goto fail; 2682 } 2683 2684 result->m_pkthdr.len = 0; 2685 for (m = result; m; m = m->m_next) 2686 result->m_pkthdr.len += m->m_len; 2687 2688 mtod(result, struct sadb_msg *)->sadb_msg_len = 2689 PFKEY_UNIT64(result->m_pkthdr.len); 2690 2691 return result; 2692 2693 fail: 2694 m_freem(result); 2695 return NULL; 2696 } 2697 2698 /* 2699 * get PFKEY message length for security policy and request. 2700 */ 2701 static u_int 2702 key_getspreqmsglen(const struct secpolicy *sp) 2703 { 2704 u_int tlen; 2705 2706 tlen = sizeof(struct sadb_x_policy); 2707 2708 /* if is the policy for ipsec ? */ 2709 if (sp->policy != IPSEC_POLICY_IPSEC) 2710 return tlen; 2711 2712 /* get length of ipsec requests */ 2713 { 2714 const struct ipsecrequest *isr; 2715 int len; 2716 2717 for (isr = sp->req; isr != NULL; isr = isr->next) { 2718 len = sizeof(struct sadb_x_ipsecrequest) 2719 + isr->saidx.src.sa.sa_len 2720 + isr->saidx.dst.sa.sa_len; 2721 2722 tlen += PFKEY_ALIGN8(len); 2723 } 2724 } 2725 2726 return tlen; 2727 } 2728 2729 /* 2730 * SADB_SPDEXPIRE processing 2731 * send 2732 * <base, address(SD), lifetime(CH), policy> 2733 * to KMD by PF_KEY. 2734 * 2735 * OUT: 0 : succeed 2736 * others : error number 2737 */ 2738 static int 2739 key_spdexpire(struct secpolicy *sp) 2740 { 2741 int s; 2742 struct mbuf *result = NULL, *m; 2743 int len; 2744 int error = -1; 2745 struct sadb_lifetime *lt; 2746 2747 /* XXX: Why do we lock ? */ 2748 s = splsoftnet(); /*called from softclock()*/ 2749 2750 KASSERT(sp != NULL); 2751 2752 /* set msg header */ 2753 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2754 if (!m) { 2755 error = ENOBUFS; 2756 goto fail; 2757 } 2758 result = m; 2759 2760 /* create lifetime extension (current and hard) */ 2761 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2762 m = key_alloc_mbuf(len); 2763 if (!m || m->m_next) { /*XXX*/ 2764 if (m) 2765 m_freem(m); 2766 error = ENOBUFS; 2767 goto fail; 2768 } 2769 memset(mtod(m, void *), 0, len); 2770 lt = mtod(m, struct sadb_lifetime *); 2771 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2772 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2773 lt->sadb_lifetime_allocations = 0; 2774 lt->sadb_lifetime_bytes = 0; 2775 lt->sadb_lifetime_addtime = sp->created + time_second - time_uptime; 2776 lt->sadb_lifetime_usetime = sp->lastused + time_second - time_uptime; 2777 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2778 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2779 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2780 lt->sadb_lifetime_allocations = 0; 2781 lt->sadb_lifetime_bytes = 0; 2782 lt->sadb_lifetime_addtime = sp->lifetime; 2783 lt->sadb_lifetime_usetime = sp->validtime; 2784 m_cat(result, m); 2785 2786 /* set sadb_address for source */ 2787 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2788 &sp->spidx.src.sa, 2789 sp->spidx.prefs, sp->spidx.ul_proto); 2790 if (!m) { 2791 error = ENOBUFS; 2792 goto fail; 2793 } 2794 m_cat(result, m); 2795 2796 /* set sadb_address for destination */ 2797 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2798 &sp->spidx.dst.sa, 2799 sp->spidx.prefd, sp->spidx.ul_proto); 2800 if (!m) { 2801 error = ENOBUFS; 2802 goto fail; 2803 } 2804 m_cat(result, m); 2805 2806 /* set secpolicy */ 2807 m = key_sp2msg(sp); 2808 if (!m) { 2809 error = ENOBUFS; 2810 goto fail; 2811 } 2812 m_cat(result, m); 2813 2814 if ((result->m_flags & M_PKTHDR) == 0) { 2815 error = EINVAL; 2816 goto fail; 2817 } 2818 2819 if (result->m_len < sizeof(struct sadb_msg)) { 2820 result = m_pullup(result, sizeof(struct sadb_msg)); 2821 if (result == NULL) { 2822 error = ENOBUFS; 2823 goto fail; 2824 } 2825 } 2826 2827 result->m_pkthdr.len = 0; 2828 for (m = result; m; m = m->m_next) 2829 result->m_pkthdr.len += m->m_len; 2830 2831 mtod(result, struct sadb_msg *)->sadb_msg_len = 2832 PFKEY_UNIT64(result->m_pkthdr.len); 2833 2834 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2835 2836 fail: 2837 if (result) 2838 m_freem(result); 2839 splx(s); 2840 return error; 2841 } 2842 2843 /* %%% SAD management */ 2844 /* 2845 * allocating a memory for new SA head, and copy from the values of mhp. 2846 * OUT: NULL : failure due to the lack of memory. 2847 * others : pointer to new SA head. 2848 */ 2849 static struct secashead * 2850 key_newsah(const struct secasindex *saidx) 2851 { 2852 struct secashead *newsah; 2853 int i; 2854 2855 KASSERT(saidx != NULL); 2856 2857 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 2858 for (i = 0; i < __arraycount(newsah->savtree); i++) 2859 LIST_INIT(&newsah->savtree[i]); 2860 newsah->saidx = *saidx; 2861 2862 /* add to saidxtree */ 2863 newsah->state = SADB_SASTATE_MATURE; 2864 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2865 2866 return newsah; 2867 } 2868 2869 /* 2870 * delete SA index and all SA registerd. 2871 */ 2872 static void 2873 key_delsah(struct secashead *sah) 2874 { 2875 struct secasvar *sav, *nextsav; 2876 u_int state; 2877 int s; 2878 int zombie = 0; 2879 2880 KASSERT(!cpu_softintr_p()); 2881 KASSERT(sah != NULL); 2882 2883 s = splsoftnet(); 2884 2885 /* searching all SA registerd in the secindex. */ 2886 SASTATE_ANY_FOREACH(state) { 2887 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2888 if (sav->refcnt == 0) { 2889 /* sanity check */ 2890 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2891 KEY_FREESAV(&sav); 2892 } else { 2893 /* give up to delete this sa */ 2894 zombie++; 2895 } 2896 } 2897 } 2898 2899 /* don't delete sah only if there are savs. */ 2900 if (zombie) { 2901 splx(s); 2902 return; 2903 } 2904 2905 rtcache_free(&sah->sa_route); 2906 2907 /* remove from tree of SA index */ 2908 if (__LIST_CHAINED(sah)) 2909 LIST_REMOVE(sah, chain); 2910 2911 if (sah->idents != NULL) 2912 kmem_free(sah->idents, sah->idents_len); 2913 if (sah->identd != NULL) 2914 kmem_free(sah->identd, sah->identd_len); 2915 2916 kmem_free(sah, sizeof(*sah)); 2917 2918 splx(s); 2919 return; 2920 } 2921 2922 /* 2923 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2924 * and copy the values of mhp into new buffer. 2925 * When SAD message type is GETSPI: 2926 * to set sequence number from acq_seq++, 2927 * to set zero to SPI. 2928 * not to call key_setsava(). 2929 * OUT: NULL : fail 2930 * others : pointer to new secasvar. 2931 * 2932 * does not modify mbuf. does not free mbuf on error. 2933 */ 2934 static struct secasvar * 2935 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 2936 struct secashead *sah, int *errp, 2937 const char* where, int tag) 2938 { 2939 struct secasvar *newsav; 2940 const struct sadb_sa *xsa; 2941 2942 KASSERT(!cpu_softintr_p()); 2943 KASSERT(m != NULL); 2944 KASSERT(mhp != NULL); 2945 KASSERT(mhp->msg != NULL); 2946 KASSERT(sah != NULL); 2947 2948 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 2949 2950 switch (mhp->msg->sadb_msg_type) { 2951 case SADB_GETSPI: 2952 newsav->spi = 0; 2953 2954 #ifdef IPSEC_DOSEQCHECK 2955 /* sync sequence number */ 2956 if (mhp->msg->sadb_msg_seq == 0) 2957 newsav->seq = 2958 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2959 else 2960 #endif 2961 newsav->seq = mhp->msg->sadb_msg_seq; 2962 break; 2963 2964 case SADB_ADD: 2965 /* sanity check */ 2966 if (mhp->ext[SADB_EXT_SA] == NULL) { 2967 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2968 *errp = EINVAL; 2969 goto error; 2970 } 2971 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2972 newsav->spi = xsa->sadb_sa_spi; 2973 newsav->seq = mhp->msg->sadb_msg_seq; 2974 break; 2975 default: 2976 *errp = EINVAL; 2977 goto error; 2978 } 2979 2980 /* copy sav values */ 2981 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2982 *errp = key_setsaval(newsav, m, mhp); 2983 if (*errp) 2984 goto error; 2985 } 2986 2987 /* reset created */ 2988 newsav->created = time_uptime; 2989 newsav->pid = mhp->msg->sadb_msg_pid; 2990 2991 /* add to satree */ 2992 newsav->sah = sah; 2993 newsav->refcnt = 1; 2994 newsav->state = SADB_SASTATE_LARVAL; 2995 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2996 secasvar, chain); 2997 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 2998 "DP from %s:%u return SA:%p\n", where, tag, newsav); 2999 return newsav; 3000 3001 error: 3002 KASSERT(*errp != 0); 3003 kmem_free(newsav, sizeof(*newsav)); 3004 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3005 "DP from %s:%u return SA:NULL\n", where, tag); 3006 return NULL; 3007 } 3008 3009 /* 3010 * free() SA variable entry. 3011 */ 3012 static void 3013 key_delsav(struct secasvar *sav) 3014 { 3015 3016 KASSERT(sav != NULL); 3017 KASSERTMSG(sav->refcnt == 0, 3018 "reference count %u > 0", sav->refcnt); 3019 3020 /* remove from SA header */ 3021 if (__LIST_CHAINED(sav)) 3022 LIST_REMOVE(sav, chain); 3023 3024 /* 3025 * Cleanup xform state. Note that zeroize'ing causes the 3026 * keys to be cleared; otherwise we must do it ourself. 3027 */ 3028 if (sav->tdb_xform != NULL) { 3029 sav->tdb_xform->xf_zeroize(sav); 3030 sav->tdb_xform = NULL; 3031 } else { 3032 if (sav->key_auth != NULL) 3033 explicit_memset(_KEYBUF(sav->key_auth), 0, 3034 _KEYLEN(sav->key_auth)); 3035 if (sav->key_enc != NULL) 3036 explicit_memset(_KEYBUF(sav->key_enc), 0, 3037 _KEYLEN(sav->key_enc)); 3038 } 3039 3040 key_freesaval(sav); 3041 kmem_intr_free(sav, sizeof(*sav)); 3042 3043 return; 3044 } 3045 3046 /* 3047 * search SAD. 3048 * OUT: 3049 * NULL : not found 3050 * others : found, pointer to a SA. 3051 */ 3052 static struct secashead * 3053 key_getsah(const struct secasindex *saidx) 3054 { 3055 struct secashead *sah; 3056 3057 LIST_FOREACH(sah, &sahtree, chain) { 3058 if (sah->state == SADB_SASTATE_DEAD) 3059 continue; 3060 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3061 return sah; 3062 } 3063 3064 return NULL; 3065 } 3066 3067 /* 3068 * check not to be duplicated SPI. 3069 * NOTE: this function is too slow due to searching all SAD. 3070 * OUT: 3071 * NULL : not found 3072 * others : found, pointer to a SA. 3073 */ 3074 static struct secasvar * 3075 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3076 { 3077 struct secashead *sah; 3078 struct secasvar *sav; 3079 3080 /* check address family */ 3081 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3082 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3083 return NULL; 3084 } 3085 3086 /* check all SAD */ 3087 LIST_FOREACH(sah, &sahtree, chain) { 3088 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3089 continue; 3090 sav = key_getsavbyspi(sah, spi); 3091 if (sav != NULL) 3092 return sav; 3093 } 3094 3095 return NULL; 3096 } 3097 3098 /* 3099 * search SAD litmited alive SA, protocol, SPI. 3100 * OUT: 3101 * NULL : not found 3102 * others : found, pointer to a SA. 3103 */ 3104 static struct secasvar * 3105 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3106 { 3107 struct secasvar *sav; 3108 u_int state; 3109 3110 /* search all status */ 3111 SASTATE_ALIVE_FOREACH(state) { 3112 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3113 3114 /* sanity check */ 3115 if (sav->state != state) { 3116 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3117 "invalid sav->state (queue: %d SA: %d)\n", 3118 state, sav->state)); 3119 continue; 3120 } 3121 3122 if (sav->spi == spi) 3123 return sav; 3124 } 3125 } 3126 3127 return NULL; 3128 } 3129 3130 /* 3131 * Free allocated data to member variables of sav: 3132 * sav->replay, sav->key_* and sav->lft_*. 3133 */ 3134 static void 3135 key_freesaval(struct secasvar *sav) 3136 { 3137 3138 if (sav->replay != NULL) { 3139 kmem_intr_free(sav->replay, sav->replay_len); 3140 sav->replay = NULL; 3141 sav->replay_len = 0; 3142 } 3143 if (sav->key_auth != NULL) { 3144 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3145 sav->key_auth = NULL; 3146 sav->key_auth_len = 0; 3147 } 3148 if (sav->key_enc != NULL) { 3149 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3150 sav->key_enc = NULL; 3151 sav->key_enc_len = 0; 3152 } 3153 if (sav->lft_c != NULL) { 3154 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3155 sav->lft_c = NULL; 3156 } 3157 if (sav->lft_h != NULL) { 3158 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3159 sav->lft_h = NULL; 3160 } 3161 if (sav->lft_s != NULL) { 3162 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3163 sav->lft_s = NULL; 3164 } 3165 } 3166 3167 /* 3168 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3169 * You must update these if need. 3170 * OUT: 0: success. 3171 * !0: failure. 3172 * 3173 * does not modify mbuf. does not free mbuf on error. 3174 */ 3175 static int 3176 key_setsaval(struct secasvar *sav, struct mbuf *m, 3177 const struct sadb_msghdr *mhp) 3178 { 3179 int error = 0; 3180 3181 KASSERT(!cpu_softintr_p()); 3182 KASSERT(m != NULL); 3183 KASSERT(mhp != NULL); 3184 KASSERT(mhp->msg != NULL); 3185 3186 /* initialization */ 3187 key_freesaval(sav); 3188 sav->tdb_xform = NULL; /* transform */ 3189 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3190 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3191 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3192 sav->natt_type = 0; 3193 sav->esp_frag = 0; 3194 3195 /* SA */ 3196 if (mhp->ext[SADB_EXT_SA] != NULL) { 3197 const struct sadb_sa *sa0; 3198 3199 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3200 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3201 error = EINVAL; 3202 goto fail; 3203 } 3204 3205 sav->alg_auth = sa0->sadb_sa_auth; 3206 sav->alg_enc = sa0->sadb_sa_encrypt; 3207 sav->flags = sa0->sadb_sa_flags; 3208 3209 /* replay window */ 3210 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3211 size_t len = sizeof(struct secreplay) + 3212 sa0->sadb_sa_replay; 3213 sav->replay = kmem_zalloc(len, KM_SLEEP); 3214 sav->replay_len = len; 3215 if (sa0->sadb_sa_replay != 0) 3216 sav->replay->bitmap = (char*)(sav->replay+1); 3217 sav->replay->wsize = sa0->sadb_sa_replay; 3218 } 3219 } 3220 3221 /* Authentication keys */ 3222 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3223 const struct sadb_key *key0; 3224 int len; 3225 3226 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3227 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3228 3229 error = 0; 3230 if (len < sizeof(*key0)) { 3231 error = EINVAL; 3232 goto fail; 3233 } 3234 switch (mhp->msg->sadb_msg_satype) { 3235 case SADB_SATYPE_AH: 3236 case SADB_SATYPE_ESP: 3237 case SADB_X_SATYPE_TCPSIGNATURE: 3238 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3239 sav->alg_auth != SADB_X_AALG_NULL) 3240 error = EINVAL; 3241 break; 3242 case SADB_X_SATYPE_IPCOMP: 3243 default: 3244 error = EINVAL; 3245 break; 3246 } 3247 if (error) { 3248 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3249 goto fail; 3250 } 3251 3252 sav->key_auth = key_newbuf(key0, len); 3253 sav->key_auth_len = len; 3254 } 3255 3256 /* Encryption key */ 3257 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3258 const struct sadb_key *key0; 3259 int len; 3260 3261 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3262 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3263 3264 error = 0; 3265 if (len < sizeof(*key0)) { 3266 error = EINVAL; 3267 goto fail; 3268 } 3269 switch (mhp->msg->sadb_msg_satype) { 3270 case SADB_SATYPE_ESP: 3271 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3272 sav->alg_enc != SADB_EALG_NULL) { 3273 error = EINVAL; 3274 break; 3275 } 3276 sav->key_enc = key_newbuf(key0, len); 3277 sav->key_enc_len = len; 3278 break; 3279 case SADB_X_SATYPE_IPCOMP: 3280 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3281 error = EINVAL; 3282 sav->key_enc = NULL; /*just in case*/ 3283 break; 3284 case SADB_SATYPE_AH: 3285 case SADB_X_SATYPE_TCPSIGNATURE: 3286 default: 3287 error = EINVAL; 3288 break; 3289 } 3290 if (error) { 3291 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3292 goto fail; 3293 } 3294 } 3295 3296 /* set iv */ 3297 sav->ivlen = 0; 3298 3299 switch (mhp->msg->sadb_msg_satype) { 3300 case SADB_SATYPE_AH: 3301 error = xform_init(sav, XF_AH); 3302 break; 3303 case SADB_SATYPE_ESP: 3304 error = xform_init(sav, XF_ESP); 3305 break; 3306 case SADB_X_SATYPE_IPCOMP: 3307 error = xform_init(sav, XF_IPCOMP); 3308 break; 3309 case SADB_X_SATYPE_TCPSIGNATURE: 3310 error = xform_init(sav, XF_TCPSIGNATURE); 3311 break; 3312 } 3313 if (error) { 3314 ipseclog((LOG_DEBUG, 3315 "key_setsaval: unable to initialize SA type %u.\n", 3316 mhp->msg->sadb_msg_satype)); 3317 goto fail; 3318 } 3319 3320 /* reset created */ 3321 sav->created = time_uptime; 3322 3323 /* make lifetime for CURRENT */ 3324 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3325 3326 sav->lft_c->sadb_lifetime_len = 3327 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3328 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3329 sav->lft_c->sadb_lifetime_allocations = 0; 3330 sav->lft_c->sadb_lifetime_bytes = 0; 3331 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3332 sav->lft_c->sadb_lifetime_usetime = 0; 3333 3334 /* lifetimes for HARD and SOFT */ 3335 { 3336 const struct sadb_lifetime *lft0; 3337 3338 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3339 if (lft0 != NULL) { 3340 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3341 error = EINVAL; 3342 goto fail; 3343 } 3344 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3345 } 3346 3347 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3348 if (lft0 != NULL) { 3349 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3350 error = EINVAL; 3351 goto fail; 3352 } 3353 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3354 /* to be initialize ? */ 3355 } 3356 } 3357 3358 return 0; 3359 3360 fail: 3361 /* initialization */ 3362 key_freesaval(sav); 3363 3364 return error; 3365 } 3366 3367 /* 3368 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3369 * OUT: 0: valid 3370 * other: errno 3371 */ 3372 static int 3373 key_mature(struct secasvar *sav) 3374 { 3375 int error; 3376 3377 /* check SPI value */ 3378 switch (sav->sah->saidx.proto) { 3379 case IPPROTO_ESP: 3380 case IPPROTO_AH: 3381 if (ntohl(sav->spi) <= 255) { 3382 ipseclog((LOG_DEBUG, 3383 "key_mature: illegal range of SPI %u.\n", 3384 (u_int32_t)ntohl(sav->spi))); 3385 return EINVAL; 3386 } 3387 break; 3388 } 3389 3390 /* check satype */ 3391 switch (sav->sah->saidx.proto) { 3392 case IPPROTO_ESP: 3393 /* check flags */ 3394 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3395 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3396 ipseclog((LOG_DEBUG, "key_mature: " 3397 "invalid flag (derived) given to old-esp.\n")); 3398 return EINVAL; 3399 } 3400 error = xform_init(sav, XF_ESP); 3401 break; 3402 case IPPROTO_AH: 3403 /* check flags */ 3404 if (sav->flags & SADB_X_EXT_DERIV) { 3405 ipseclog((LOG_DEBUG, "key_mature: " 3406 "invalid flag (derived) given to AH SA.\n")); 3407 return EINVAL; 3408 } 3409 if (sav->alg_enc != SADB_EALG_NONE) { 3410 ipseclog((LOG_DEBUG, "key_mature: " 3411 "protocol and algorithm mismated.\n")); 3412 return(EINVAL); 3413 } 3414 error = xform_init(sav, XF_AH); 3415 break; 3416 case IPPROTO_IPCOMP: 3417 if (sav->alg_auth != SADB_AALG_NONE) { 3418 ipseclog((LOG_DEBUG, "key_mature: " 3419 "protocol and algorithm mismated.\n")); 3420 return(EINVAL); 3421 } 3422 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3423 && ntohl(sav->spi) >= 0x10000) { 3424 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3425 return(EINVAL); 3426 } 3427 error = xform_init(sav, XF_IPCOMP); 3428 break; 3429 case IPPROTO_TCP: 3430 if (sav->alg_enc != SADB_EALG_NONE) { 3431 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3432 "mismated.\n", __func__)); 3433 return(EINVAL); 3434 } 3435 error = xform_init(sav, XF_TCPSIGNATURE); 3436 break; 3437 default: 3438 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3439 error = EPROTONOSUPPORT; 3440 break; 3441 } 3442 if (error == 0) 3443 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3444 return (error); 3445 } 3446 3447 /* 3448 * subroutine for SADB_GET and SADB_DUMP. 3449 */ 3450 static struct mbuf * 3451 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3452 u_int32_t seq, u_int32_t pid) 3453 { 3454 struct mbuf *result = NULL, *tres = NULL, *m; 3455 int l = 0; 3456 int i; 3457 void *p; 3458 struct sadb_lifetime lt; 3459 int dumporder[] = { 3460 SADB_EXT_SA, SADB_X_EXT_SA2, 3461 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3462 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3463 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3464 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3465 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3466 SADB_X_EXT_NAT_T_TYPE, 3467 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3468 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3469 SADB_X_EXT_NAT_T_FRAG, 3470 3471 }; 3472 3473 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3474 if (m == NULL) 3475 goto fail; 3476 result = m; 3477 3478 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3479 m = NULL; 3480 p = NULL; 3481 switch (dumporder[i]) { 3482 case SADB_EXT_SA: 3483 m = key_setsadbsa(sav); 3484 break; 3485 3486 case SADB_X_EXT_SA2: 3487 m = key_setsadbxsa2(sav->sah->saidx.mode, 3488 sav->replay ? sav->replay->count : 0, 3489 sav->sah->saidx.reqid); 3490 break; 3491 3492 case SADB_EXT_ADDRESS_SRC: 3493 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3494 &sav->sah->saidx.src.sa, 3495 FULLMASK, IPSEC_ULPROTO_ANY); 3496 break; 3497 3498 case SADB_EXT_ADDRESS_DST: 3499 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3500 &sav->sah->saidx.dst.sa, 3501 FULLMASK, IPSEC_ULPROTO_ANY); 3502 break; 3503 3504 case SADB_EXT_KEY_AUTH: 3505 if (!sav->key_auth) 3506 continue; 3507 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3508 p = sav->key_auth; 3509 break; 3510 3511 case SADB_EXT_KEY_ENCRYPT: 3512 if (!sav->key_enc) 3513 continue; 3514 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3515 p = sav->key_enc; 3516 break; 3517 3518 case SADB_EXT_LIFETIME_CURRENT: 3519 if (!sav->lft_c) 3520 continue; 3521 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3522 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3523 lt.sadb_lifetime_addtime += time_second - time_uptime; 3524 lt.sadb_lifetime_usetime += time_second - time_uptime; 3525 p = < 3526 break; 3527 3528 case SADB_EXT_LIFETIME_HARD: 3529 if (!sav->lft_h) 3530 continue; 3531 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3532 p = sav->lft_h; 3533 break; 3534 3535 case SADB_EXT_LIFETIME_SOFT: 3536 if (!sav->lft_s) 3537 continue; 3538 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3539 p = sav->lft_s; 3540 break; 3541 3542 case SADB_X_EXT_NAT_T_TYPE: 3543 m = key_setsadbxtype(sav->natt_type); 3544 break; 3545 3546 case SADB_X_EXT_NAT_T_DPORT: 3547 if (sav->natt_type == 0) 3548 continue; 3549 m = key_setsadbxport( 3550 key_portfromsaddr(&sav->sah->saidx.dst), 3551 SADB_X_EXT_NAT_T_DPORT); 3552 break; 3553 3554 case SADB_X_EXT_NAT_T_SPORT: 3555 if (sav->natt_type == 0) 3556 continue; 3557 m = key_setsadbxport( 3558 key_portfromsaddr(&sav->sah->saidx.src), 3559 SADB_X_EXT_NAT_T_SPORT); 3560 break; 3561 3562 case SADB_X_EXT_NAT_T_FRAG: 3563 /* don't send frag info if not set */ 3564 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3565 continue; 3566 m = key_setsadbxfrag(sav->esp_frag); 3567 break; 3568 3569 case SADB_X_EXT_NAT_T_OAI: 3570 case SADB_X_EXT_NAT_T_OAR: 3571 continue; 3572 3573 case SADB_EXT_ADDRESS_PROXY: 3574 case SADB_EXT_IDENTITY_SRC: 3575 case SADB_EXT_IDENTITY_DST: 3576 /* XXX: should we brought from SPD ? */ 3577 case SADB_EXT_SENSITIVITY: 3578 default: 3579 continue; 3580 } 3581 3582 KASSERT(!(m && p)); 3583 if (!m && !p) 3584 goto fail; 3585 if (p && tres) { 3586 M_PREPEND(tres, l, M_DONTWAIT); 3587 if (!tres) 3588 goto fail; 3589 memcpy(mtod(tres, void *), p, l); 3590 continue; 3591 } 3592 if (p) { 3593 m = key_alloc_mbuf(l); 3594 if (!m) 3595 goto fail; 3596 m_copyback(m, 0, l, p); 3597 } 3598 3599 if (tres) 3600 m_cat(m, tres); 3601 tres = m; 3602 } 3603 3604 m_cat(result, tres); 3605 tres = NULL; /* avoid free on error below */ 3606 3607 if (result->m_len < sizeof(struct sadb_msg)) { 3608 result = m_pullup(result, sizeof(struct sadb_msg)); 3609 if (result == NULL) 3610 goto fail; 3611 } 3612 3613 result->m_pkthdr.len = 0; 3614 for (m = result; m; m = m->m_next) 3615 result->m_pkthdr.len += m->m_len; 3616 3617 mtod(result, struct sadb_msg *)->sadb_msg_len = 3618 PFKEY_UNIT64(result->m_pkthdr.len); 3619 3620 return result; 3621 3622 fail: 3623 m_freem(result); 3624 m_freem(tres); 3625 return NULL; 3626 } 3627 3628 3629 /* 3630 * set a type in sadb_x_nat_t_type 3631 */ 3632 static struct mbuf * 3633 key_setsadbxtype(u_int16_t type) 3634 { 3635 struct mbuf *m; 3636 size_t len; 3637 struct sadb_x_nat_t_type *p; 3638 3639 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3640 3641 m = key_alloc_mbuf(len); 3642 if (!m || m->m_next) { /*XXX*/ 3643 if (m) 3644 m_freem(m); 3645 return NULL; 3646 } 3647 3648 p = mtod(m, struct sadb_x_nat_t_type *); 3649 3650 memset(p, 0, len); 3651 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3652 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3653 p->sadb_x_nat_t_type_type = type; 3654 3655 return m; 3656 } 3657 /* 3658 * set a port in sadb_x_nat_t_port. port is in network order 3659 */ 3660 static struct mbuf * 3661 key_setsadbxport(u_int16_t port, u_int16_t type) 3662 { 3663 struct mbuf *m; 3664 size_t len; 3665 struct sadb_x_nat_t_port *p; 3666 3667 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3668 3669 m = key_alloc_mbuf(len); 3670 if (!m || m->m_next) { /*XXX*/ 3671 if (m) 3672 m_freem(m); 3673 return NULL; 3674 } 3675 3676 p = mtod(m, struct sadb_x_nat_t_port *); 3677 3678 memset(p, 0, len); 3679 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3680 p->sadb_x_nat_t_port_exttype = type; 3681 p->sadb_x_nat_t_port_port = port; 3682 3683 return m; 3684 } 3685 3686 /* 3687 * set fragmentation info in sadb_x_nat_t_frag 3688 */ 3689 static struct mbuf * 3690 key_setsadbxfrag(u_int16_t flen) 3691 { 3692 struct mbuf *m; 3693 size_t len; 3694 struct sadb_x_nat_t_frag *p; 3695 3696 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3697 3698 m = key_alloc_mbuf(len); 3699 if (!m || m->m_next) { /*XXX*/ 3700 if (m) 3701 m_freem(m); 3702 return NULL; 3703 } 3704 3705 p = mtod(m, struct sadb_x_nat_t_frag *); 3706 3707 memset(p, 0, len); 3708 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3709 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3710 p->sadb_x_nat_t_frag_fraglen = flen; 3711 3712 return m; 3713 } 3714 3715 /* 3716 * Get port from sockaddr, port is in network order 3717 */ 3718 u_int16_t 3719 key_portfromsaddr(const union sockaddr_union *saddr) 3720 { 3721 u_int16_t port; 3722 3723 switch (saddr->sa.sa_family) { 3724 case AF_INET: { 3725 port = saddr->sin.sin_port; 3726 break; 3727 } 3728 #ifdef INET6 3729 case AF_INET6: { 3730 port = saddr->sin6.sin6_port; 3731 break; 3732 } 3733 #endif 3734 default: 3735 printf("%s: unexpected address family\n", __func__); 3736 port = 0; 3737 break; 3738 } 3739 3740 return port; 3741 } 3742 3743 3744 /* 3745 * Set port is struct sockaddr. port is in network order 3746 */ 3747 static void 3748 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3749 { 3750 switch (saddr->sa.sa_family) { 3751 case AF_INET: { 3752 saddr->sin.sin_port = port; 3753 break; 3754 } 3755 #ifdef INET6 3756 case AF_INET6: { 3757 saddr->sin6.sin6_port = port; 3758 break; 3759 } 3760 #endif 3761 default: 3762 printf("%s: unexpected address family %d\n", __func__, 3763 saddr->sa.sa_family); 3764 break; 3765 } 3766 3767 return; 3768 } 3769 3770 /* 3771 * Safety check sa_len 3772 */ 3773 static int 3774 key_checksalen(const union sockaddr_union *saddr) 3775 { 3776 switch (saddr->sa.sa_family) { 3777 case AF_INET: 3778 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3779 return -1; 3780 break; 3781 #ifdef INET6 3782 case AF_INET6: 3783 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3784 return -1; 3785 break; 3786 #endif 3787 default: 3788 printf("%s: unexpected sa_family %d\n", __func__, 3789 saddr->sa.sa_family); 3790 return -1; 3791 break; 3792 } 3793 return 0; 3794 } 3795 3796 3797 /* 3798 * set data into sadb_msg. 3799 */ 3800 static struct mbuf * 3801 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3802 u_int32_t seq, pid_t pid, u_int16_t reserved) 3803 { 3804 struct mbuf *m; 3805 struct sadb_msg *p; 3806 int len; 3807 3808 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3809 if (len > MCLBYTES) 3810 return NULL; 3811 MGETHDR(m, M_DONTWAIT, MT_DATA); 3812 if (m && len > MHLEN) { 3813 MCLGET(m, M_DONTWAIT); 3814 if ((m->m_flags & M_EXT) == 0) { 3815 m_freem(m); 3816 m = NULL; 3817 } 3818 } 3819 if (!m) 3820 return NULL; 3821 m->m_pkthdr.len = m->m_len = len; 3822 m->m_next = NULL; 3823 3824 p = mtod(m, struct sadb_msg *); 3825 3826 memset(p, 0, len); 3827 p->sadb_msg_version = PF_KEY_V2; 3828 p->sadb_msg_type = type; 3829 p->sadb_msg_errno = 0; 3830 p->sadb_msg_satype = satype; 3831 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3832 p->sadb_msg_reserved = reserved; 3833 p->sadb_msg_seq = seq; 3834 p->sadb_msg_pid = (u_int32_t)pid; 3835 3836 return m; 3837 } 3838 3839 /* 3840 * copy secasvar data into sadb_address. 3841 */ 3842 static struct mbuf * 3843 key_setsadbsa(struct secasvar *sav) 3844 { 3845 struct mbuf *m; 3846 struct sadb_sa *p; 3847 int len; 3848 3849 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3850 m = key_alloc_mbuf(len); 3851 if (!m || m->m_next) { /*XXX*/ 3852 if (m) 3853 m_freem(m); 3854 return NULL; 3855 } 3856 3857 p = mtod(m, struct sadb_sa *); 3858 3859 memset(p, 0, len); 3860 p->sadb_sa_len = PFKEY_UNIT64(len); 3861 p->sadb_sa_exttype = SADB_EXT_SA; 3862 p->sadb_sa_spi = sav->spi; 3863 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3864 p->sadb_sa_state = sav->state; 3865 p->sadb_sa_auth = sav->alg_auth; 3866 p->sadb_sa_encrypt = sav->alg_enc; 3867 p->sadb_sa_flags = sav->flags; 3868 3869 return m; 3870 } 3871 3872 /* 3873 * set data into sadb_address. 3874 */ 3875 static struct mbuf * 3876 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3877 u_int8_t prefixlen, u_int16_t ul_proto) 3878 { 3879 struct mbuf *m; 3880 struct sadb_address *p; 3881 size_t len; 3882 3883 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3884 PFKEY_ALIGN8(saddr->sa_len); 3885 m = key_alloc_mbuf(len); 3886 if (!m || m->m_next) { /*XXX*/ 3887 if (m) 3888 m_freem(m); 3889 return NULL; 3890 } 3891 3892 p = mtod(m, struct sadb_address *); 3893 3894 memset(p, 0, len); 3895 p->sadb_address_len = PFKEY_UNIT64(len); 3896 p->sadb_address_exttype = exttype; 3897 p->sadb_address_proto = ul_proto; 3898 if (prefixlen == FULLMASK) { 3899 switch (saddr->sa_family) { 3900 case AF_INET: 3901 prefixlen = sizeof(struct in_addr) << 3; 3902 break; 3903 case AF_INET6: 3904 prefixlen = sizeof(struct in6_addr) << 3; 3905 break; 3906 default: 3907 ; /*XXX*/ 3908 } 3909 } 3910 p->sadb_address_prefixlen = prefixlen; 3911 p->sadb_address_reserved = 0; 3912 3913 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3914 saddr, saddr->sa_len); 3915 3916 return m; 3917 } 3918 3919 #if 0 3920 /* 3921 * set data into sadb_ident. 3922 */ 3923 static struct mbuf * 3924 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3925 void *string, int stringlen, u_int64_t id) 3926 { 3927 struct mbuf *m; 3928 struct sadb_ident *p; 3929 size_t len; 3930 3931 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3932 m = key_alloc_mbuf(len); 3933 if (!m || m->m_next) { /*XXX*/ 3934 if (m) 3935 m_freem(m); 3936 return NULL; 3937 } 3938 3939 p = mtod(m, struct sadb_ident *); 3940 3941 memset(p, 0, len); 3942 p->sadb_ident_len = PFKEY_UNIT64(len); 3943 p->sadb_ident_exttype = exttype; 3944 p->sadb_ident_type = idtype; 3945 p->sadb_ident_reserved = 0; 3946 p->sadb_ident_id = id; 3947 3948 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 3949 string, stringlen); 3950 3951 return m; 3952 } 3953 #endif 3954 3955 /* 3956 * set data into sadb_x_sa2. 3957 */ 3958 static struct mbuf * 3959 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 3960 { 3961 struct mbuf *m; 3962 struct sadb_x_sa2 *p; 3963 size_t len; 3964 3965 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3966 m = key_alloc_mbuf(len); 3967 if (!m || m->m_next) { /*XXX*/ 3968 if (m) 3969 m_freem(m); 3970 return NULL; 3971 } 3972 3973 p = mtod(m, struct sadb_x_sa2 *); 3974 3975 memset(p, 0, len); 3976 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3977 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3978 p->sadb_x_sa2_mode = mode; 3979 p->sadb_x_sa2_reserved1 = 0; 3980 p->sadb_x_sa2_reserved2 = 0; 3981 p->sadb_x_sa2_sequence = seq; 3982 p->sadb_x_sa2_reqid = reqid; 3983 3984 return m; 3985 } 3986 3987 /* 3988 * set data into sadb_x_policy 3989 */ 3990 static struct mbuf * 3991 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3992 { 3993 struct mbuf *m; 3994 struct sadb_x_policy *p; 3995 size_t len; 3996 3997 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3998 m = key_alloc_mbuf(len); 3999 if (!m || m->m_next) { /*XXX*/ 4000 if (m) 4001 m_freem(m); 4002 return NULL; 4003 } 4004 4005 p = mtod(m, struct sadb_x_policy *); 4006 4007 memset(p, 0, len); 4008 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4009 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4010 p->sadb_x_policy_type = type; 4011 p->sadb_x_policy_dir = dir; 4012 p->sadb_x_policy_id = id; 4013 4014 return m; 4015 } 4016 4017 /* %%% utilities */ 4018 /* 4019 * copy a buffer into the new buffer allocated. 4020 */ 4021 static void * 4022 key_newbuf(const void *src, u_int len) 4023 { 4024 void *new; 4025 4026 new = kmem_alloc(len, KM_SLEEP); 4027 memcpy(new, src, len); 4028 4029 return new; 4030 } 4031 4032 /* compare my own address 4033 * OUT: 1: true, i.e. my address. 4034 * 0: false 4035 */ 4036 int 4037 key_ismyaddr(const struct sockaddr *sa) 4038 { 4039 #ifdef INET 4040 const struct sockaddr_in *sin; 4041 const struct in_ifaddr *ia; 4042 int s; 4043 #endif 4044 4045 KASSERT(sa != NULL); 4046 4047 switch (sa->sa_family) { 4048 #ifdef INET 4049 case AF_INET: 4050 sin = (const struct sockaddr_in *)sa; 4051 s = pserialize_read_enter(); 4052 IN_ADDRLIST_READER_FOREACH(ia) { 4053 if (sin->sin_family == ia->ia_addr.sin_family && 4054 sin->sin_len == ia->ia_addr.sin_len && 4055 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4056 { 4057 pserialize_read_exit(s); 4058 return 1; 4059 } 4060 } 4061 pserialize_read_exit(s); 4062 break; 4063 #endif 4064 #ifdef INET6 4065 case AF_INET6: 4066 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4067 #endif 4068 } 4069 4070 return 0; 4071 } 4072 4073 #ifdef INET6 4074 /* 4075 * compare my own address for IPv6. 4076 * 1: ours 4077 * 0: other 4078 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4079 */ 4080 #include <netinet6/in6_var.h> 4081 4082 static int 4083 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4084 { 4085 struct in6_ifaddr *ia; 4086 int s; 4087 struct psref psref; 4088 int bound; 4089 int ours = 1; 4090 4091 bound = curlwp_bind(); 4092 s = pserialize_read_enter(); 4093 IN6_ADDRLIST_READER_FOREACH(ia) { 4094 bool ingroup; 4095 4096 if (key_sockaddrcmp((const struct sockaddr *)&sin6, 4097 (const struct sockaddr *)&ia->ia_addr, 0) == 0) { 4098 pserialize_read_exit(s); 4099 goto ours; 4100 } 4101 ia6_acquire(ia, &psref); 4102 pserialize_read_exit(s); 4103 4104 /* 4105 * XXX Multicast 4106 * XXX why do we care about multlicast here while we don't care 4107 * about IPv4 multicast?? 4108 * XXX scope 4109 */ 4110 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4111 if (ingroup) { 4112 ia6_release(ia, &psref); 4113 goto ours; 4114 } 4115 4116 s = pserialize_read_enter(); 4117 ia6_release(ia, &psref); 4118 } 4119 pserialize_read_exit(s); 4120 4121 /* loopback, just for safety */ 4122 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4123 goto ours; 4124 4125 ours = 0; 4126 ours: 4127 curlwp_bindx(bound); 4128 4129 return ours; 4130 } 4131 #endif /*INET6*/ 4132 4133 /* 4134 * compare two secasindex structure. 4135 * flag can specify to compare 2 saidxes. 4136 * compare two secasindex structure without both mode and reqid. 4137 * don't compare port. 4138 * IN: 4139 * saidx0: source, it can be in SAD. 4140 * saidx1: object. 4141 * OUT: 4142 * 1 : equal 4143 * 0 : not equal 4144 */ 4145 static int 4146 key_cmpsaidx( 4147 const struct secasindex *saidx0, 4148 const struct secasindex *saidx1, 4149 int flag) 4150 { 4151 int chkport; 4152 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4153 4154 /* sanity */ 4155 if (saidx0 == NULL && saidx1 == NULL) 4156 return 1; 4157 4158 if (saidx0 == NULL || saidx1 == NULL) 4159 return 0; 4160 4161 if (saidx0->proto != saidx1->proto) 4162 return 0; 4163 4164 if (flag == CMP_EXACTLY) { 4165 if (saidx0->mode != saidx1->mode) 4166 return 0; 4167 if (saidx0->reqid != saidx1->reqid) 4168 return 0; 4169 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4170 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4171 return 0; 4172 } else { 4173 4174 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4175 if (flag == CMP_MODE_REQID 4176 ||flag == CMP_REQID) { 4177 /* 4178 * If reqid of SPD is non-zero, unique SA is required. 4179 * The result must be of same reqid in this case. 4180 */ 4181 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4182 return 0; 4183 } 4184 4185 if (flag == CMP_MODE_REQID) { 4186 if (saidx0->mode != IPSEC_MODE_ANY 4187 && saidx0->mode != saidx1->mode) 4188 return 0; 4189 } 4190 4191 4192 sa0src = &saidx0->src.sa; 4193 sa0dst = &saidx0->dst.sa; 4194 sa1src = &saidx1->src.sa; 4195 sa1dst = &saidx1->dst.sa; 4196 /* 4197 * If NAT-T is enabled, check ports for tunnel mode. 4198 * Don't do it for transport mode, as there is no 4199 * port information available in the SP. 4200 * Also don't check ports if they are set to zero 4201 * in the SPD: This means we have a non-generated 4202 * SPD which can't know UDP ports. 4203 */ 4204 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4205 chkport = PORT_LOOSE; 4206 else 4207 chkport = PORT_NONE; 4208 4209 if (key_sockaddrcmp(sa0src, sa1src, chkport) != 0) { 4210 return 0; 4211 } 4212 if (key_sockaddrcmp(sa0dst, sa1dst, chkport) != 0) { 4213 return 0; 4214 } 4215 } 4216 4217 return 1; 4218 } 4219 4220 /* 4221 * compare two secindex structure exactly. 4222 * IN: 4223 * spidx0: source, it is often in SPD. 4224 * spidx1: object, it is often from PFKEY message. 4225 * OUT: 4226 * 1 : equal 4227 * 0 : not equal 4228 */ 4229 int 4230 key_cmpspidx_exactly( 4231 const struct secpolicyindex *spidx0, 4232 const struct secpolicyindex *spidx1) 4233 { 4234 /* sanity */ 4235 if (spidx0 == NULL && spidx1 == NULL) 4236 return 1; 4237 4238 if (spidx0 == NULL || spidx1 == NULL) 4239 return 0; 4240 4241 if (spidx0->prefs != spidx1->prefs 4242 || spidx0->prefd != spidx1->prefd 4243 || spidx0->ul_proto != spidx1->ul_proto) 4244 return 0; 4245 4246 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) == 0 && 4247 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT) == 0; 4248 } 4249 4250 /* 4251 * compare two secindex structure with mask. 4252 * IN: 4253 * spidx0: source, it is often in SPD. 4254 * spidx1: object, it is often from IP header. 4255 * OUT: 4256 * 1 : equal 4257 * 0 : not equal 4258 */ 4259 int 4260 key_cmpspidx_withmask( 4261 const struct secpolicyindex *spidx0, 4262 const struct secpolicyindex *spidx1) 4263 { 4264 /* sanity */ 4265 if (spidx0 == NULL && spidx1 == NULL) 4266 return 1; 4267 4268 if (spidx0 == NULL || spidx1 == NULL) 4269 return 0; 4270 4271 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4272 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4273 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4274 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4275 return 0; 4276 4277 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4278 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4279 && spidx0->ul_proto != spidx1->ul_proto) 4280 return 0; 4281 4282 switch (spidx0->src.sa.sa_family) { 4283 case AF_INET: 4284 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4285 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4286 return 0; 4287 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4288 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4289 return 0; 4290 break; 4291 case AF_INET6: 4292 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4293 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4294 return 0; 4295 /* 4296 * scope_id check. if sin6_scope_id is 0, we regard it 4297 * as a wildcard scope, which matches any scope zone ID. 4298 */ 4299 if (spidx0->src.sin6.sin6_scope_id && 4300 spidx1->src.sin6.sin6_scope_id && 4301 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4302 return 0; 4303 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4304 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4305 return 0; 4306 break; 4307 default: 4308 /* XXX */ 4309 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4310 return 0; 4311 break; 4312 } 4313 4314 switch (spidx0->dst.sa.sa_family) { 4315 case AF_INET: 4316 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4317 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4318 return 0; 4319 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4320 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4321 return 0; 4322 break; 4323 case AF_INET6: 4324 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4325 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4326 return 0; 4327 /* 4328 * scope_id check. if sin6_scope_id is 0, we regard it 4329 * as a wildcard scope, which matches any scope zone ID. 4330 */ 4331 if (spidx0->src.sin6.sin6_scope_id && 4332 spidx1->src.sin6.sin6_scope_id && 4333 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4334 return 0; 4335 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4336 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4337 return 0; 4338 break; 4339 default: 4340 /* XXX */ 4341 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4342 return 0; 4343 break; 4344 } 4345 4346 /* XXX Do we check other field ? e.g. flowinfo */ 4347 4348 return 1; 4349 } 4350 4351 /* returns 0 on match */ 4352 static int 4353 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4354 { 4355 switch (howport) { 4356 case PORT_NONE: 4357 return 0; 4358 case PORT_LOOSE: 4359 if (port1 == 0 || port2 == 0) 4360 return 0; 4361 /*FALLTHROUGH*/ 4362 case PORT_STRICT: 4363 if (port1 != port2) { 4364 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4365 "port fail %d != %d\n", port1, port2); 4366 return 1; 4367 } 4368 return 0; 4369 default: 4370 KASSERT(0); 4371 return 1; 4372 } 4373 } 4374 4375 /* returns 0 on match */ 4376 static int 4377 key_sockaddrcmp( 4378 const struct sockaddr *sa1, 4379 const struct sockaddr *sa2, 4380 int howport) 4381 { 4382 const struct sockaddr_in *sin1, *sin2; 4383 const struct sockaddr_in6 *sin61, *sin62; 4384 4385 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4386 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4387 "fam/len fail %d != %d || %d != %d\n", 4388 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4389 sa2->sa_len); 4390 return 1; 4391 } 4392 4393 switch (sa1->sa_family) { 4394 case AF_INET: 4395 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4396 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4397 "len fail %d != %zu\n", 4398 sa1->sa_len, sizeof(struct sockaddr_in)); 4399 return 1; 4400 } 4401 sin1 = (const struct sockaddr_in *)sa1; 4402 sin2 = (const struct sockaddr_in *)sa2; 4403 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4404 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4405 "addr fail %#x != %#x\n", 4406 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4407 return 1; 4408 } 4409 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4410 return 1; 4411 } 4412 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4413 "addr success %#x[%d] == %#x[%d]\n", 4414 sin1->sin_addr.s_addr, sin1->sin_port, 4415 sin2->sin_addr.s_addr, sin2->sin_port); 4416 break; 4417 case AF_INET6: 4418 sin61 = (const struct sockaddr_in6 *)sa1; 4419 sin62 = (const struct sockaddr_in6 *)sa2; 4420 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4421 return 1; /*EINVAL*/ 4422 4423 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4424 return 1; 4425 } 4426 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4427 return 1; 4428 } 4429 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4430 return 1; 4431 } 4432 break; 4433 default: 4434 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4435 return 1; 4436 break; 4437 } 4438 4439 return 0; 4440 } 4441 4442 /* 4443 * compare two buffers with mask. 4444 * IN: 4445 * addr1: source 4446 * addr2: object 4447 * bits: Number of bits to compare 4448 * OUT: 4449 * 1 : equal 4450 * 0 : not equal 4451 */ 4452 static int 4453 key_bbcmp(const void *a1, const void *a2, u_int bits) 4454 { 4455 const unsigned char *p1 = a1; 4456 const unsigned char *p2 = a2; 4457 4458 /* XXX: This could be considerably faster if we compare a word 4459 * at a time, but it is complicated on LSB Endian machines */ 4460 4461 /* Handle null pointers */ 4462 if (p1 == NULL || p2 == NULL) 4463 return (p1 == p2); 4464 4465 while (bits >= 8) { 4466 if (*p1++ != *p2++) 4467 return 0; 4468 bits -= 8; 4469 } 4470 4471 if (bits > 0) { 4472 u_int8_t mask = ~((1<<(8-bits))-1); 4473 if ((*p1 & mask) != (*p2 & mask)) 4474 return 0; 4475 } 4476 return 1; /* Match! */ 4477 } 4478 4479 /* 4480 * time handler. 4481 * scanning SPD and SAD to check status for each entries, 4482 * and do to remove or to expire. 4483 */ 4484 static void 4485 key_timehandler_work(struct work *wk, void *arg) 4486 { 4487 u_int dir; 4488 int s; 4489 time_t now = time_uptime; 4490 4491 s = splsoftnet(); 4492 mutex_enter(softnet_lock); 4493 4494 /* SPD */ 4495 { 4496 struct secpolicy *sp, *nextsp; 4497 4498 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4499 LIST_FOREACH_SAFE(sp, &sptree[dir], chain, nextsp) { 4500 if (sp->state == IPSEC_SPSTATE_DEAD) { 4501 key_sp_unlink(sp); /*XXX*/ 4502 4503 /* 'sp' dead; continue transfers to 4504 * 'sp = nextsp' 4505 */ 4506 continue; 4507 } 4508 4509 if (sp->lifetime == 0 && sp->validtime == 0) 4510 continue; 4511 4512 /* the deletion will occur next time */ 4513 if ((sp->lifetime && now - sp->created > sp->lifetime) 4514 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4515 key_sp_dead(sp); 4516 key_spdexpire(sp); 4517 continue; 4518 } 4519 } 4520 } 4521 } 4522 4523 /* SAD */ 4524 { 4525 struct secashead *sah, *nextsah; 4526 struct secasvar *sav, *nextsav; 4527 4528 LIST_FOREACH_SAFE(sah, &sahtree, chain, nextsah) { 4529 /* if sah has been dead, then delete it and process next sah. */ 4530 if (sah->state == SADB_SASTATE_DEAD) { 4531 key_delsah(sah); 4532 continue; 4533 } 4534 4535 /* if LARVAL entry doesn't become MATURE, delete it. */ 4536 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], 4537 chain, nextsav) { 4538 if (now - sav->created > key_larval_lifetime) { 4539 KEY_FREESAV(&sav); 4540 } 4541 } 4542 4543 /* 4544 * check MATURE entry to start to send expire message 4545 * whether or not. 4546 */ 4547 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], 4548 chain, nextsav) { 4549 /* we don't need to check. */ 4550 if (sav->lft_s == NULL) 4551 continue; 4552 4553 /* sanity check */ 4554 if (sav->lft_c == NULL) { 4555 ipseclog((LOG_DEBUG,"key_timehandler: " 4556 "There is no CURRENT time, why?\n")); 4557 continue; 4558 } 4559 4560 /* check SOFT lifetime */ 4561 if (sav->lft_s->sadb_lifetime_addtime != 0 4562 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4563 /* 4564 * check SA to be used whether or not. 4565 * when SA hasn't been used, delete it. 4566 */ 4567 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4568 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4569 KEY_FREESAV(&sav); 4570 } else { 4571 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4572 /* 4573 * XXX If we keep to send expire 4574 * message in the status of 4575 * DYING. Do remove below code. 4576 */ 4577 key_expire(sav); 4578 } 4579 } 4580 /* check SOFT lifetime by bytes */ 4581 /* 4582 * XXX I don't know the way to delete this SA 4583 * when new SA is installed. Caution when it's 4584 * installed too big lifetime by time. 4585 */ 4586 else if (sav->lft_s->sadb_lifetime_bytes != 0 4587 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4588 4589 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4590 /* 4591 * XXX If we keep to send expire 4592 * message in the status of 4593 * DYING. Do remove below code. 4594 */ 4595 key_expire(sav); 4596 } 4597 } 4598 4599 /* check DYING entry to change status to DEAD. */ 4600 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], 4601 chain, nextsav) { 4602 /* we don't need to check. */ 4603 if (sav->lft_h == NULL) 4604 continue; 4605 4606 /* sanity check */ 4607 if (sav->lft_c == NULL) { 4608 ipseclog((LOG_DEBUG, "key_timehandler: " 4609 "There is no CURRENT time, why?\n")); 4610 continue; 4611 } 4612 4613 if (sav->lft_h->sadb_lifetime_addtime != 0 4614 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4615 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4616 KEY_FREESAV(&sav); 4617 } 4618 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4619 else if (sav->lft_s != NULL 4620 && sav->lft_s->sadb_lifetime_addtime != 0 4621 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4622 /* 4623 * XXX: should be checked to be 4624 * installed the valid SA. 4625 */ 4626 4627 /* 4628 * If there is no SA then sending 4629 * expire message. 4630 */ 4631 key_expire(sav); 4632 } 4633 #endif 4634 /* check HARD lifetime by bytes */ 4635 else if (sav->lft_h->sadb_lifetime_bytes != 0 4636 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4637 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4638 KEY_FREESAV(&sav); 4639 } 4640 } 4641 4642 /* delete entry in DEAD */ 4643 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], 4644 chain, nextsav) { 4645 /* sanity check */ 4646 if (sav->state != SADB_SASTATE_DEAD) { 4647 ipseclog((LOG_DEBUG, "key_timehandler: " 4648 "invalid sav->state " 4649 "(queue: %d SA: %d): " 4650 "kill it anyway\n", 4651 SADB_SASTATE_DEAD, sav->state)); 4652 } 4653 4654 /* 4655 * do not call key_freesav() here. 4656 * sav should already be freed, and sav->refcnt 4657 * shows other references to sav 4658 * (such as from SPD). 4659 */ 4660 } 4661 } 4662 } 4663 4664 #ifndef IPSEC_NONBLOCK_ACQUIRE 4665 /* ACQ tree */ 4666 { 4667 struct secacq *acq, *nextacq; 4668 4669 LIST_FOREACH_SAFE(acq, &acqtree, chain, nextacq) { 4670 if (now - acq->created > key_blockacq_lifetime 4671 && __LIST_CHAINED(acq)) { 4672 LIST_REMOVE(acq, chain); 4673 kmem_free(acq, sizeof(*acq)); 4674 } 4675 } 4676 } 4677 #endif 4678 4679 /* SP ACQ tree */ 4680 { 4681 struct secspacq *acq, *nextacq; 4682 4683 LIST_FOREACH_SAFE(acq, &spacqtree, chain, nextacq) { 4684 if (now - acq->created > key_blockacq_lifetime 4685 && __LIST_CHAINED(acq)) { 4686 LIST_REMOVE(acq, chain); 4687 kmem_free(acq, sizeof(*acq)); 4688 } 4689 } 4690 } 4691 4692 /* do exchange to tick time !! */ 4693 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4694 4695 mutex_exit(softnet_lock); 4696 splx(s); 4697 return; 4698 } 4699 4700 static void 4701 key_timehandler(void *arg) 4702 { 4703 4704 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 4705 } 4706 4707 u_long 4708 key_random(void) 4709 { 4710 u_long value; 4711 4712 key_randomfill(&value, sizeof(value)); 4713 return value; 4714 } 4715 4716 void 4717 key_randomfill(void *p, size_t l) 4718 { 4719 4720 cprng_fast(p, l); 4721 } 4722 4723 /* 4724 * map SADB_SATYPE_* to IPPROTO_*. 4725 * if satype == SADB_SATYPE then satype is mapped to ~0. 4726 * OUT: 4727 * 0: invalid satype. 4728 */ 4729 static u_int16_t 4730 key_satype2proto(u_int8_t satype) 4731 { 4732 switch (satype) { 4733 case SADB_SATYPE_UNSPEC: 4734 return IPSEC_PROTO_ANY; 4735 case SADB_SATYPE_AH: 4736 return IPPROTO_AH; 4737 case SADB_SATYPE_ESP: 4738 return IPPROTO_ESP; 4739 case SADB_X_SATYPE_IPCOMP: 4740 return IPPROTO_IPCOMP; 4741 case SADB_X_SATYPE_TCPSIGNATURE: 4742 return IPPROTO_TCP; 4743 default: 4744 return 0; 4745 } 4746 /* NOTREACHED */ 4747 } 4748 4749 /* 4750 * map IPPROTO_* to SADB_SATYPE_* 4751 * OUT: 4752 * 0: invalid protocol type. 4753 */ 4754 static u_int8_t 4755 key_proto2satype(u_int16_t proto) 4756 { 4757 switch (proto) { 4758 case IPPROTO_AH: 4759 return SADB_SATYPE_AH; 4760 case IPPROTO_ESP: 4761 return SADB_SATYPE_ESP; 4762 case IPPROTO_IPCOMP: 4763 return SADB_X_SATYPE_IPCOMP; 4764 case IPPROTO_TCP: 4765 return SADB_X_SATYPE_TCPSIGNATURE; 4766 default: 4767 return 0; 4768 } 4769 /* NOTREACHED */ 4770 } 4771 4772 static int 4773 key_setsecasidx(int proto, int mode, int reqid, 4774 const struct sadb_address * src, 4775 const struct sadb_address * dst, 4776 struct secasindex * saidx) 4777 { 4778 const union sockaddr_union * src_u = 4779 (const union sockaddr_union *) src; 4780 const union sockaddr_union * dst_u = 4781 (const union sockaddr_union *) dst; 4782 4783 /* sa len safety check */ 4784 if (key_checksalen(src_u) != 0) 4785 return -1; 4786 if (key_checksalen(dst_u) != 0) 4787 return -1; 4788 4789 memset(saidx, 0, sizeof(*saidx)); 4790 saidx->proto = proto; 4791 saidx->mode = mode; 4792 saidx->reqid = reqid; 4793 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4794 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4795 4796 key_porttosaddr(&((saidx)->src),0); 4797 key_porttosaddr(&((saidx)->dst),0); 4798 return 0; 4799 } 4800 4801 /* %%% PF_KEY */ 4802 /* 4803 * SADB_GETSPI processing is to receive 4804 * <base, (SA2), src address, dst address, (SPI range)> 4805 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4806 * tree with the status of LARVAL, and send 4807 * <base, SA(*), address(SD)> 4808 * to the IKMPd. 4809 * 4810 * IN: mhp: pointer to the pointer to each header. 4811 * OUT: NULL if fail. 4812 * other if success, return pointer to the message to send. 4813 */ 4814 static int 4815 key_getspi(struct socket *so, struct mbuf *m, 4816 const struct sadb_msghdr *mhp) 4817 { 4818 struct sadb_address *src0, *dst0; 4819 struct secasindex saidx; 4820 struct secashead *newsah; 4821 struct secasvar *newsav; 4822 u_int8_t proto; 4823 u_int32_t spi; 4824 u_int8_t mode; 4825 u_int16_t reqid; 4826 int error; 4827 4828 KASSERT(!cpu_softintr_p()); 4829 KASSERT(so != NULL); 4830 KASSERT(m != NULL); 4831 KASSERT(mhp != NULL); 4832 KASSERT(mhp->msg != NULL); 4833 4834 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4835 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4836 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4837 return key_senderror(so, m, EINVAL); 4838 } 4839 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4840 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4841 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4842 return key_senderror(so, m, EINVAL); 4843 } 4844 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4845 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4846 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4847 } else { 4848 mode = IPSEC_MODE_ANY; 4849 reqid = 0; 4850 } 4851 4852 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4853 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4854 4855 /* map satype to proto */ 4856 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4857 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4858 return key_senderror(so, m, EINVAL); 4859 } 4860 4861 4862 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4863 dst0 + 1, &saidx)) != 0) 4864 return key_senderror(so, m, EINVAL); 4865 4866 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 4867 return key_senderror(so, m, EINVAL); 4868 4869 /* SPI allocation */ 4870 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4871 &saidx); 4872 if (spi == 0) 4873 return key_senderror(so, m, EINVAL); 4874 4875 /* get a SA index */ 4876 if ((newsah = key_getsah(&saidx)) == NULL) { 4877 /* create a new SA index */ 4878 if ((newsah = key_newsah(&saidx)) == NULL) { 4879 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4880 return key_senderror(so, m, ENOBUFS); 4881 } 4882 } 4883 4884 /* get a new SA */ 4885 /* XXX rewrite */ 4886 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4887 if (newsav == NULL) { 4888 /* XXX don't free new SA index allocated in above. */ 4889 return key_senderror(so, m, error); 4890 } 4891 4892 /* set spi */ 4893 newsav->spi = htonl(spi); 4894 4895 #ifndef IPSEC_NONBLOCK_ACQUIRE 4896 /* delete the entry in acqtree */ 4897 if (mhp->msg->sadb_msg_seq != 0) { 4898 struct secacq *acq; 4899 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4900 /* reset counter in order to deletion by timehandler. */ 4901 acq->created = time_uptime; 4902 acq->count = 0; 4903 } 4904 } 4905 #endif 4906 4907 { 4908 struct mbuf *n, *nn; 4909 struct sadb_sa *m_sa; 4910 struct sadb_msg *newmsg; 4911 int off, len; 4912 4913 /* create new sadb_msg to reply. */ 4914 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4915 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4916 if (len > MCLBYTES) 4917 return key_senderror(so, m, ENOBUFS); 4918 4919 MGETHDR(n, M_DONTWAIT, MT_DATA); 4920 if (len > MHLEN) { 4921 MCLGET(n, M_DONTWAIT); 4922 if ((n->m_flags & M_EXT) == 0) { 4923 m_freem(n); 4924 n = NULL; 4925 } 4926 } 4927 if (!n) 4928 return key_senderror(so, m, ENOBUFS); 4929 4930 n->m_len = len; 4931 n->m_next = NULL; 4932 off = 0; 4933 4934 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 4935 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4936 4937 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 4938 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4939 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4940 m_sa->sadb_sa_spi = htonl(spi); 4941 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4942 4943 KASSERTMSG(off == len, "length inconsistency"); 4944 4945 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4946 SADB_EXT_ADDRESS_DST); 4947 if (!n->m_next) { 4948 m_freem(n); 4949 return key_senderror(so, m, ENOBUFS); 4950 } 4951 4952 if (n->m_len < sizeof(struct sadb_msg)) { 4953 n = m_pullup(n, sizeof(struct sadb_msg)); 4954 if (n == NULL) 4955 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4956 } 4957 4958 n->m_pkthdr.len = 0; 4959 for (nn = n; nn; nn = nn->m_next) 4960 n->m_pkthdr.len += nn->m_len; 4961 4962 newmsg = mtod(n, struct sadb_msg *); 4963 newmsg->sadb_msg_seq = newsav->seq; 4964 newmsg->sadb_msg_errno = 0; 4965 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4966 4967 m_freem(m); 4968 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4969 } 4970 } 4971 4972 /* 4973 * allocating new SPI 4974 * called by key_getspi(). 4975 * OUT: 4976 * 0: failure. 4977 * others: success. 4978 */ 4979 static u_int32_t 4980 key_do_getnewspi(const struct sadb_spirange *spirange, 4981 const struct secasindex *saidx) 4982 { 4983 u_int32_t newspi; 4984 u_int32_t spmin, spmax; 4985 int count = key_spi_trycnt; 4986 4987 /* set spi range to allocate */ 4988 if (spirange != NULL) { 4989 spmin = spirange->sadb_spirange_min; 4990 spmax = spirange->sadb_spirange_max; 4991 } else { 4992 spmin = key_spi_minval; 4993 spmax = key_spi_maxval; 4994 } 4995 /* IPCOMP needs 2-byte SPI */ 4996 if (saidx->proto == IPPROTO_IPCOMP) { 4997 u_int32_t t; 4998 if (spmin >= 0x10000) 4999 spmin = 0xffff; 5000 if (spmax >= 0x10000) 5001 spmax = 0xffff; 5002 if (spmin > spmax) { 5003 t = spmin; spmin = spmax; spmax = t; 5004 } 5005 } 5006 5007 if (spmin == spmax) { 5008 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5009 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5010 return 0; 5011 } 5012 5013 count--; /* taking one cost. */ 5014 newspi = spmin; 5015 5016 } else { 5017 5018 /* init SPI */ 5019 newspi = 0; 5020 5021 /* when requesting to allocate spi ranged */ 5022 while (count--) { 5023 /* generate pseudo-random SPI value ranged. */ 5024 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5025 5026 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5027 break; 5028 } 5029 5030 if (count == 0 || newspi == 0) { 5031 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5032 return 0; 5033 } 5034 } 5035 5036 /* statistics */ 5037 keystat.getspi_count = 5038 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5039 5040 return newspi; 5041 } 5042 5043 static int 5044 key_handle_natt_info(struct secasvar *sav, 5045 const struct sadb_msghdr *mhp) 5046 { 5047 const char *msg = "?" ; 5048 struct sadb_x_nat_t_type *type; 5049 struct sadb_x_nat_t_port *sport, *dport; 5050 struct sadb_address *iaddr, *raddr; 5051 struct sadb_x_nat_t_frag *frag; 5052 5053 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5054 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5055 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5056 return 0; 5057 5058 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5059 msg = "TYPE"; 5060 goto bad; 5061 } 5062 5063 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5064 msg = "SPORT"; 5065 goto bad; 5066 } 5067 5068 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5069 msg = "DPORT"; 5070 goto bad; 5071 } 5072 5073 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5074 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5075 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5076 msg = "OAI"; 5077 goto bad; 5078 } 5079 } 5080 5081 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5082 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5083 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5084 msg = "OAR"; 5085 goto bad; 5086 } 5087 } 5088 5089 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5090 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5091 msg = "FRAG"; 5092 goto bad; 5093 } 5094 } 5095 5096 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5097 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5098 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5099 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5100 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5101 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5102 5103 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5104 __func__, type->sadb_x_nat_t_type_type, 5105 ntohs(sport->sadb_x_nat_t_port_port), 5106 ntohs(dport->sadb_x_nat_t_port_port))); 5107 5108 sav->natt_type = type->sadb_x_nat_t_type_type; 5109 key_porttosaddr(&sav->sah->saidx.src, 5110 sport->sadb_x_nat_t_port_port); 5111 key_porttosaddr(&sav->sah->saidx.dst, 5112 dport->sadb_x_nat_t_port_port); 5113 if (frag) 5114 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5115 else 5116 sav->esp_frag = IP_MAXPACKET; 5117 5118 return 0; 5119 bad: 5120 ipseclog((LOG_DEBUG, "%s: invalid message %s\n", __func__, msg)); 5121 __USE(msg); 5122 return -1; 5123 } 5124 5125 /* Just update the IPSEC_NAT_T ports if present */ 5126 static int 5127 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5128 const struct sadb_msghdr *mhp) 5129 { 5130 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5131 ipseclog((LOG_DEBUG,"%s: NAT-T OAi present\n", __func__)); 5132 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5133 ipseclog((LOG_DEBUG,"%s: NAT-T OAr present\n", __func__)); 5134 5135 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5136 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5137 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5138 struct sadb_x_nat_t_type *type; 5139 struct sadb_x_nat_t_port *sport; 5140 struct sadb_x_nat_t_port *dport; 5141 5142 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5143 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5144 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5145 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5146 __func__)); 5147 return -1; 5148 } 5149 5150 type = (struct sadb_x_nat_t_type *) 5151 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5152 sport = (struct sadb_x_nat_t_port *) 5153 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5154 dport = (struct sadb_x_nat_t_port *) 5155 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5156 5157 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5158 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5159 5160 ipseclog((LOG_DEBUG, "%s: type %d, sport = %d, dport = %d\n", 5161 __func__, type->sadb_x_nat_t_type_type, 5162 ntohs(sport->sadb_x_nat_t_port_port), 5163 ntohs(dport->sadb_x_nat_t_port_port))); 5164 } 5165 5166 return 0; 5167 } 5168 5169 5170 /* 5171 * SADB_UPDATE processing 5172 * receive 5173 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5174 * key(AE), (identity(SD),) (sensitivity)> 5175 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5176 * and send 5177 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5178 * (identity(SD),) (sensitivity)> 5179 * to the ikmpd. 5180 * 5181 * m will always be freed. 5182 */ 5183 static int 5184 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5185 { 5186 struct sadb_sa *sa0; 5187 struct sadb_address *src0, *dst0; 5188 struct secasindex saidx; 5189 struct secashead *sah; 5190 struct secasvar *sav; 5191 u_int16_t proto; 5192 u_int8_t mode; 5193 u_int16_t reqid; 5194 int error; 5195 5196 KASSERT(!cpu_softintr_p()); 5197 KASSERT(so != NULL); 5198 KASSERT(m != NULL); 5199 KASSERT(mhp != NULL); 5200 KASSERT(mhp->msg != NULL); 5201 5202 /* map satype to proto */ 5203 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5204 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5205 return key_senderror(so, m, EINVAL); 5206 } 5207 5208 if (mhp->ext[SADB_EXT_SA] == NULL || 5209 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5210 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5211 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5212 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5213 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5214 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5215 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5216 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5217 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5218 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5219 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5220 return key_senderror(so, m, EINVAL); 5221 } 5222 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5223 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5224 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5225 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5226 return key_senderror(so, m, EINVAL); 5227 } 5228 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5229 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5230 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5231 } else { 5232 mode = IPSEC_MODE_ANY; 5233 reqid = 0; 5234 } 5235 /* XXX boundary checking for other extensions */ 5236 5237 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5238 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5239 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5240 5241 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5242 dst0 + 1, &saidx)) != 0) 5243 return key_senderror(so, m, EINVAL); 5244 5245 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5246 return key_senderror(so, m, EINVAL); 5247 5248 /* get a SA header */ 5249 if ((sah = key_getsah(&saidx)) == NULL) { 5250 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5251 return key_senderror(so, m, ENOENT); 5252 } 5253 5254 /* set spidx if there */ 5255 /* XXX rewrite */ 5256 error = key_setident(sah, m, mhp); 5257 if (error) 5258 return key_senderror(so, m, error); 5259 5260 /* find a SA with sequence number. */ 5261 #ifdef IPSEC_DOSEQCHECK 5262 if (mhp->msg->sadb_msg_seq != 0 5263 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5264 ipseclog((LOG_DEBUG, 5265 "key_update: no larval SA with sequence %u exists.\n", 5266 mhp->msg->sadb_msg_seq)); 5267 return key_senderror(so, m, ENOENT); 5268 } 5269 #else 5270 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5271 ipseclog((LOG_DEBUG, 5272 "key_update: no such a SA found (spi:%u)\n", 5273 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5274 return key_senderror(so, m, EINVAL); 5275 } 5276 #endif 5277 5278 /* validity check */ 5279 if (sav->sah->saidx.proto != proto) { 5280 ipseclog((LOG_DEBUG, 5281 "key_update: protocol mismatched (DB=%u param=%u)\n", 5282 sav->sah->saidx.proto, proto)); 5283 return key_senderror(so, m, EINVAL); 5284 } 5285 #ifdef IPSEC_DOSEQCHECK 5286 if (sav->spi != sa0->sadb_sa_spi) { 5287 ipseclog((LOG_DEBUG, 5288 "key_update: SPI mismatched (DB:%u param:%u)\n", 5289 (u_int32_t)ntohl(sav->spi), 5290 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5291 return key_senderror(so, m, EINVAL); 5292 } 5293 #endif 5294 if (sav->pid != mhp->msg->sadb_msg_pid) { 5295 ipseclog((LOG_DEBUG, 5296 "key_update: pid mismatched (DB:%u param:%u)\n", 5297 sav->pid, mhp->msg->sadb_msg_pid)); 5298 return key_senderror(so, m, EINVAL); 5299 } 5300 5301 /* copy sav values */ 5302 error = key_setsaval(sav, m, mhp); 5303 if (error) { 5304 KEY_FREESAV(&sav); 5305 return key_senderror(so, m, error); 5306 } 5307 5308 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5309 return key_senderror(so, m, EINVAL); 5310 5311 /* check SA values to be mature. */ 5312 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5313 KEY_FREESAV(&sav); 5314 return key_senderror(so, m, 0); 5315 } 5316 5317 { 5318 struct mbuf *n; 5319 5320 /* set msg buf from mhp */ 5321 n = key_getmsgbuf_x1(m, mhp); 5322 if (n == NULL) { 5323 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5324 return key_senderror(so, m, ENOBUFS); 5325 } 5326 5327 m_freem(m); 5328 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5329 } 5330 } 5331 5332 /* 5333 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5334 * only called by key_update(). 5335 * OUT: 5336 * NULL : not found 5337 * others : found, pointer to a SA. 5338 */ 5339 #ifdef IPSEC_DOSEQCHECK 5340 static struct secasvar * 5341 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5342 { 5343 struct secasvar *sav; 5344 u_int state; 5345 5346 state = SADB_SASTATE_LARVAL; 5347 5348 /* search SAD with sequence number ? */ 5349 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5350 5351 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5352 5353 if (sav->seq == seq) { 5354 SA_ADDREF(sav); 5355 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5356 "DP cause refcnt++:%d SA:%p\n", 5357 sav->refcnt, sav); 5358 return sav; 5359 } 5360 } 5361 5362 return NULL; 5363 } 5364 #endif 5365 5366 /* 5367 * SADB_ADD processing 5368 * add an entry to SA database, when received 5369 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5370 * key(AE), (identity(SD),) (sensitivity)> 5371 * from the ikmpd, 5372 * and send 5373 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5374 * (identity(SD),) (sensitivity)> 5375 * to the ikmpd. 5376 * 5377 * IGNORE identity and sensitivity messages. 5378 * 5379 * m will always be freed. 5380 */ 5381 static int 5382 key_add(struct socket *so, struct mbuf *m, 5383 const struct sadb_msghdr *mhp) 5384 { 5385 struct sadb_sa *sa0; 5386 struct sadb_address *src0, *dst0; 5387 struct secasindex saidx; 5388 struct secashead *newsah; 5389 struct secasvar *newsav; 5390 u_int16_t proto; 5391 u_int8_t mode; 5392 u_int16_t reqid; 5393 int error; 5394 5395 KASSERT(so != NULL); 5396 KASSERT(m != NULL); 5397 KASSERT(mhp != NULL); 5398 KASSERT(mhp->msg != NULL); 5399 5400 /* map satype to proto */ 5401 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5402 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5403 return key_senderror(so, m, EINVAL); 5404 } 5405 5406 if (mhp->ext[SADB_EXT_SA] == NULL || 5407 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5408 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5409 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5410 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5411 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5412 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5413 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5414 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5415 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5416 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5417 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5418 return key_senderror(so, m, EINVAL); 5419 } 5420 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5421 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5422 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5423 /* XXX need more */ 5424 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5425 return key_senderror(so, m, EINVAL); 5426 } 5427 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5428 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5429 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5430 } else { 5431 mode = IPSEC_MODE_ANY; 5432 reqid = 0; 5433 } 5434 5435 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5436 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5437 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5438 5439 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5440 dst0 + 1, &saidx)) != 0) 5441 return key_senderror(so, m, EINVAL); 5442 5443 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5444 return key_senderror(so, m, EINVAL); 5445 5446 /* get a SA header */ 5447 if ((newsah = key_getsah(&saidx)) == NULL) { 5448 /* create a new SA header */ 5449 if ((newsah = key_newsah(&saidx)) == NULL) { 5450 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5451 return key_senderror(so, m, ENOBUFS); 5452 } 5453 } 5454 5455 /* set spidx if there */ 5456 /* XXX rewrite */ 5457 error = key_setident(newsah, m, mhp); 5458 if (error) { 5459 return key_senderror(so, m, error); 5460 } 5461 5462 /* create new SA entry. */ 5463 /* We can create new SA only if SPI is differenct. */ 5464 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5465 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5466 return key_senderror(so, m, EEXIST); 5467 } 5468 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5469 if (newsav == NULL) { 5470 return key_senderror(so, m, error); 5471 } 5472 5473 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5474 return key_senderror(so, m, EINVAL); 5475 5476 /* check SA values to be mature. */ 5477 if ((error = key_mature(newsav)) != 0) { 5478 KEY_FREESAV(&newsav); 5479 return key_senderror(so, m, error); 5480 } 5481 5482 /* 5483 * don't call key_freesav() here, as we would like to keep the SA 5484 * in the database on success. 5485 */ 5486 5487 { 5488 struct mbuf *n; 5489 5490 /* set msg buf from mhp */ 5491 n = key_getmsgbuf_x1(m, mhp); 5492 if (n == NULL) { 5493 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5494 return key_senderror(so, m, ENOBUFS); 5495 } 5496 5497 m_freem(m); 5498 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5499 } 5500 } 5501 5502 /* m is retained */ 5503 static int 5504 key_setident(struct secashead *sah, struct mbuf *m, 5505 const struct sadb_msghdr *mhp) 5506 { 5507 const struct sadb_ident *idsrc, *iddst; 5508 int idsrclen, iddstlen; 5509 5510 KASSERT(!cpu_softintr_p()); 5511 KASSERT(sah != NULL); 5512 KASSERT(m != NULL); 5513 KASSERT(mhp != NULL); 5514 KASSERT(mhp->msg != NULL); 5515 5516 /* 5517 * Can be called with an existing sah from key_update(). 5518 */ 5519 if (sah->idents != NULL) { 5520 kmem_free(sah->idents, sah->idents_len); 5521 sah->idents = NULL; 5522 sah->idents_len = 0; 5523 } 5524 if (sah->identd != NULL) { 5525 kmem_free(sah->identd, sah->identd_len); 5526 sah->identd = NULL; 5527 sah->identd_len = 0; 5528 } 5529 5530 /* don't make buffer if not there */ 5531 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5532 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5533 sah->idents = NULL; 5534 sah->identd = NULL; 5535 return 0; 5536 } 5537 5538 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5539 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5540 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5541 return EINVAL; 5542 } 5543 5544 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5545 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5546 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5547 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5548 5549 /* validity check */ 5550 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5551 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5552 return EINVAL; 5553 } 5554 5555 switch (idsrc->sadb_ident_type) { 5556 case SADB_IDENTTYPE_PREFIX: 5557 case SADB_IDENTTYPE_FQDN: 5558 case SADB_IDENTTYPE_USERFQDN: 5559 default: 5560 /* XXX do nothing */ 5561 sah->idents = NULL; 5562 sah->identd = NULL; 5563 return 0; 5564 } 5565 5566 /* make structure */ 5567 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 5568 sah->idents_len = idsrclen; 5569 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 5570 sah->identd_len = iddstlen; 5571 memcpy(sah->idents, idsrc, idsrclen); 5572 memcpy(sah->identd, iddst, iddstlen); 5573 5574 return 0; 5575 } 5576 5577 /* 5578 * m will not be freed on return. 5579 * it is caller's responsibility to free the result. 5580 */ 5581 static struct mbuf * 5582 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5583 { 5584 struct mbuf *n; 5585 5586 KASSERT(m != NULL); 5587 KASSERT(mhp != NULL); 5588 KASSERT(mhp->msg != NULL); 5589 5590 /* create new sadb_msg to reply. */ 5591 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5592 SADB_EXT_SA, SADB_X_EXT_SA2, 5593 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5594 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5595 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5596 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5597 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5598 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5599 if (!n) 5600 return NULL; 5601 5602 if (n->m_len < sizeof(struct sadb_msg)) { 5603 n = m_pullup(n, sizeof(struct sadb_msg)); 5604 if (n == NULL) 5605 return NULL; 5606 } 5607 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5608 mtod(n, struct sadb_msg *)->sadb_msg_len = 5609 PFKEY_UNIT64(n->m_pkthdr.len); 5610 5611 return n; 5612 } 5613 5614 static int key_delete_all (struct socket *, struct mbuf *, 5615 const struct sadb_msghdr *, u_int16_t); 5616 5617 /* 5618 * SADB_DELETE processing 5619 * receive 5620 * <base, SA(*), address(SD)> 5621 * from the ikmpd, and set SADB_SASTATE_DEAD, 5622 * and send, 5623 * <base, SA(*), address(SD)> 5624 * to the ikmpd. 5625 * 5626 * m will always be freed. 5627 */ 5628 static int 5629 key_delete(struct socket *so, struct mbuf *m, 5630 const struct sadb_msghdr *mhp) 5631 { 5632 struct sadb_sa *sa0; 5633 struct sadb_address *src0, *dst0; 5634 struct secasindex saidx; 5635 struct secashead *sah; 5636 struct secasvar *sav = NULL; 5637 u_int16_t proto; 5638 int error; 5639 5640 KASSERT(so != NULL); 5641 KASSERT(m != NULL); 5642 KASSERT(mhp != NULL); 5643 KASSERT(mhp->msg != NULL); 5644 5645 /* map satype to proto */ 5646 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5647 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5648 return key_senderror(so, m, EINVAL); 5649 } 5650 5651 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5652 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5653 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5654 return key_senderror(so, m, EINVAL); 5655 } 5656 5657 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5658 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5659 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5660 return key_senderror(so, m, EINVAL); 5661 } 5662 5663 if (mhp->ext[SADB_EXT_SA] == NULL) { 5664 /* 5665 * Caller wants us to delete all non-LARVAL SAs 5666 * that match the src/dst. This is used during 5667 * IKE INITIAL-CONTACT. 5668 */ 5669 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5670 return key_delete_all(so, m, mhp, proto); 5671 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5672 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5673 return key_senderror(so, m, EINVAL); 5674 } 5675 5676 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5677 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5678 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5679 5680 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5681 dst0 + 1, &saidx)) != 0) 5682 return key_senderror(so, m, EINVAL); 5683 5684 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5685 return key_senderror(so, m, EINVAL); 5686 5687 /* get a SA header */ 5688 LIST_FOREACH(sah, &sahtree, chain) { 5689 if (sah->state == SADB_SASTATE_DEAD) 5690 continue; 5691 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5692 continue; 5693 5694 /* get a SA with SPI. */ 5695 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5696 if (sav) 5697 break; 5698 } 5699 if (sah == NULL) { 5700 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5701 return key_senderror(so, m, ENOENT); 5702 } 5703 5704 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5705 KEY_FREESAV(&sav); 5706 5707 { 5708 struct mbuf *n; 5709 struct sadb_msg *newmsg; 5710 5711 /* create new sadb_msg to reply. */ 5712 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5713 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5714 if (!n) 5715 return key_senderror(so, m, ENOBUFS); 5716 5717 if (n->m_len < sizeof(struct sadb_msg)) { 5718 n = m_pullup(n, sizeof(struct sadb_msg)); 5719 if (n == NULL) 5720 return key_senderror(so, m, ENOBUFS); 5721 } 5722 newmsg = mtod(n, struct sadb_msg *); 5723 newmsg->sadb_msg_errno = 0; 5724 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5725 5726 m_freem(m); 5727 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5728 } 5729 } 5730 5731 /* 5732 * delete all SAs for src/dst. Called from key_delete(). 5733 */ 5734 static int 5735 key_delete_all(struct socket *so, struct mbuf *m, 5736 const struct sadb_msghdr *mhp, u_int16_t proto) 5737 { 5738 struct sadb_address *src0, *dst0; 5739 struct secasindex saidx; 5740 struct secashead *sah; 5741 struct secasvar *sav, *nextsav; 5742 u_int state; 5743 int error; 5744 5745 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5746 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5747 5748 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5749 dst0 + 1, &saidx)) != 0) 5750 return key_senderror(so, m, EINVAL); 5751 5752 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5753 return key_senderror(so, m, EINVAL); 5754 5755 LIST_FOREACH(sah, &sahtree, chain) { 5756 if (sah->state == SADB_SASTATE_DEAD) 5757 continue; 5758 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5759 continue; 5760 5761 /* Delete all non-LARVAL SAs. */ 5762 SASTATE_ALIVE_FOREACH(state) { 5763 if (state == SADB_SASTATE_LARVAL) 5764 continue; 5765 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 5766 nextsav) { 5767 /* sanity check */ 5768 if (sav->state != state) { 5769 ipseclog((LOG_DEBUG, "key_delete_all: " 5770 "invalid sav->state " 5771 "(queue: %d SA: %d)\n", 5772 state, sav->state)); 5773 continue; 5774 } 5775 5776 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5777 KEY_FREESAV(&sav); 5778 } 5779 } 5780 } 5781 { 5782 struct mbuf *n; 5783 struct sadb_msg *newmsg; 5784 5785 /* create new sadb_msg to reply. */ 5786 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5787 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5788 if (!n) 5789 return key_senderror(so, m, ENOBUFS); 5790 5791 if (n->m_len < sizeof(struct sadb_msg)) { 5792 n = m_pullup(n, sizeof(struct sadb_msg)); 5793 if (n == NULL) 5794 return key_senderror(so, m, ENOBUFS); 5795 } 5796 newmsg = mtod(n, struct sadb_msg *); 5797 newmsg->sadb_msg_errno = 0; 5798 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5799 5800 m_freem(m); 5801 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5802 } 5803 } 5804 5805 /* 5806 * SADB_GET processing 5807 * receive 5808 * <base, SA(*), address(SD)> 5809 * from the ikmpd, and get a SP and a SA to respond, 5810 * and send, 5811 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5812 * (identity(SD),) (sensitivity)> 5813 * to the ikmpd. 5814 * 5815 * m will always be freed. 5816 */ 5817 static int 5818 key_get(struct socket *so, struct mbuf *m, 5819 const struct sadb_msghdr *mhp) 5820 { 5821 struct sadb_sa *sa0; 5822 struct sadb_address *src0, *dst0; 5823 struct secasindex saidx; 5824 struct secashead *sah; 5825 struct secasvar *sav = NULL; 5826 u_int16_t proto; 5827 int error; 5828 5829 KASSERT(so != NULL); 5830 KASSERT(m != NULL); 5831 KASSERT(mhp != NULL); 5832 KASSERT(mhp->msg != NULL); 5833 5834 /* map satype to proto */ 5835 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5836 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5837 return key_senderror(so, m, EINVAL); 5838 } 5839 5840 if (mhp->ext[SADB_EXT_SA] == NULL || 5841 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5842 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5843 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5844 return key_senderror(so, m, EINVAL); 5845 } 5846 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5847 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5848 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5849 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5850 return key_senderror(so, m, EINVAL); 5851 } 5852 5853 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5854 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5855 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5856 5857 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5858 dst0 + 1, &saidx)) != 0) 5859 return key_senderror(so, m, EINVAL); 5860 5861 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 5862 return key_senderror(so, m, EINVAL); 5863 5864 /* get a SA header */ 5865 LIST_FOREACH(sah, &sahtree, chain) { 5866 if (sah->state == SADB_SASTATE_DEAD) 5867 continue; 5868 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5869 continue; 5870 5871 /* get a SA with SPI. */ 5872 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5873 if (sav) 5874 break; 5875 } 5876 if (sah == NULL) { 5877 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5878 return key_senderror(so, m, ENOENT); 5879 } 5880 5881 { 5882 struct mbuf *n; 5883 u_int8_t satype; 5884 5885 /* map proto to satype */ 5886 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5887 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5888 return key_senderror(so, m, EINVAL); 5889 } 5890 5891 /* create new sadb_msg to reply. */ 5892 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5893 mhp->msg->sadb_msg_pid); 5894 if (!n) 5895 return key_senderror(so, m, ENOBUFS); 5896 5897 m_freem(m); 5898 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5899 } 5900 } 5901 5902 /* XXX make it sysctl-configurable? */ 5903 static void 5904 key_getcomb_setlifetime(struct sadb_comb *comb) 5905 { 5906 5907 comb->sadb_comb_soft_allocations = 1; 5908 comb->sadb_comb_hard_allocations = 1; 5909 comb->sadb_comb_soft_bytes = 0; 5910 comb->sadb_comb_hard_bytes = 0; 5911 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5912 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5913 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5914 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5915 } 5916 5917 /* 5918 * XXX reorder combinations by preference 5919 * XXX no idea if the user wants ESP authentication or not 5920 */ 5921 static struct mbuf * 5922 key_getcomb_esp(void) 5923 { 5924 struct sadb_comb *comb; 5925 const struct enc_xform *algo; 5926 struct mbuf *result = NULL, *m, *n; 5927 int encmin; 5928 int i, off, o; 5929 int totlen; 5930 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5931 5932 m = NULL; 5933 for (i = 1; i <= SADB_EALG_MAX; i++) { 5934 algo = esp_algorithm_lookup(i); 5935 if (algo == NULL) 5936 continue; 5937 5938 /* discard algorithms with key size smaller than system min */ 5939 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5940 continue; 5941 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5942 encmin = ipsec_esp_keymin; 5943 else 5944 encmin = _BITS(algo->minkey); 5945 5946 if (ipsec_esp_auth) 5947 m = key_getcomb_ah(); 5948 else { 5949 KASSERTMSG(l <= MLEN, 5950 "l=%u > MLEN=%lu", l, (u_long) MLEN); 5951 MGET(m, M_DONTWAIT, MT_DATA); 5952 if (m) { 5953 M_ALIGN(m, l); 5954 m->m_len = l; 5955 m->m_next = NULL; 5956 memset(mtod(m, void *), 0, m->m_len); 5957 } 5958 } 5959 if (!m) 5960 goto fail; 5961 5962 totlen = 0; 5963 for (n = m; n; n = n->m_next) 5964 totlen += n->m_len; 5965 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 5966 5967 for (off = 0; off < totlen; off += l) { 5968 n = m_pulldown(m, off, l, &o); 5969 if (!n) { 5970 /* m is already freed */ 5971 goto fail; 5972 } 5973 comb = (struct sadb_comb *)(mtod(n, char *) + o); 5974 memset(comb, 0, sizeof(*comb)); 5975 key_getcomb_setlifetime(comb); 5976 comb->sadb_comb_encrypt = i; 5977 comb->sadb_comb_encrypt_minbits = encmin; 5978 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5979 } 5980 5981 if (!result) 5982 result = m; 5983 else 5984 m_cat(result, m); 5985 } 5986 5987 return result; 5988 5989 fail: 5990 if (result) 5991 m_freem(result); 5992 return NULL; 5993 } 5994 5995 static void 5996 key_getsizes_ah(const struct auth_hash *ah, int alg, 5997 u_int16_t* ksmin, u_int16_t* ksmax) 5998 { 5999 *ksmin = *ksmax = ah->keysize; 6000 if (ah->keysize == 0) { 6001 /* 6002 * Transform takes arbitrary key size but algorithm 6003 * key size is restricted. Enforce this here. 6004 */ 6005 switch (alg) { 6006 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6007 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6008 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6009 default: 6010 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6011 alg)); 6012 break; 6013 } 6014 } 6015 } 6016 6017 /* 6018 * XXX reorder combinations by preference 6019 */ 6020 static struct mbuf * 6021 key_getcomb_ah(void) 6022 { 6023 struct sadb_comb *comb; 6024 const struct auth_hash *algo; 6025 struct mbuf *m; 6026 u_int16_t minkeysize, maxkeysize; 6027 int i; 6028 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6029 6030 m = NULL; 6031 for (i = 1; i <= SADB_AALG_MAX; i++) { 6032 #if 1 6033 /* we prefer HMAC algorithms, not old algorithms */ 6034 if (i != SADB_AALG_SHA1HMAC && 6035 i != SADB_AALG_MD5HMAC && 6036 i != SADB_X_AALG_SHA2_256 && 6037 i != SADB_X_AALG_SHA2_384 && 6038 i != SADB_X_AALG_SHA2_512) 6039 continue; 6040 #endif 6041 algo = ah_algorithm_lookup(i); 6042 if (!algo) 6043 continue; 6044 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6045 /* discard algorithms with key size smaller than system min */ 6046 if (_BITS(minkeysize) < ipsec_ah_keymin) 6047 continue; 6048 6049 if (!m) { 6050 KASSERTMSG(l <= MLEN, 6051 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6052 MGET(m, M_DONTWAIT, MT_DATA); 6053 if (m) { 6054 M_ALIGN(m, l); 6055 m->m_len = l; 6056 m->m_next = NULL; 6057 } 6058 } else 6059 M_PREPEND(m, l, M_DONTWAIT); 6060 if (!m) 6061 return NULL; 6062 6063 comb = mtod(m, struct sadb_comb *); 6064 memset(comb, 0, sizeof(*comb)); 6065 key_getcomb_setlifetime(comb); 6066 comb->sadb_comb_auth = i; 6067 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6068 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6069 } 6070 6071 return m; 6072 } 6073 6074 /* 6075 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6076 * XXX reorder combinations by preference 6077 */ 6078 static struct mbuf * 6079 key_getcomb_ipcomp(void) 6080 { 6081 struct sadb_comb *comb; 6082 const struct comp_algo *algo; 6083 struct mbuf *m; 6084 int i; 6085 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6086 6087 m = NULL; 6088 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6089 algo = ipcomp_algorithm_lookup(i); 6090 if (!algo) 6091 continue; 6092 6093 if (!m) { 6094 KASSERTMSG(l <= MLEN, 6095 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6096 MGET(m, M_DONTWAIT, MT_DATA); 6097 if (m) { 6098 M_ALIGN(m, l); 6099 m->m_len = l; 6100 m->m_next = NULL; 6101 } 6102 } else 6103 M_PREPEND(m, l, M_DONTWAIT); 6104 if (!m) 6105 return NULL; 6106 6107 comb = mtod(m, struct sadb_comb *); 6108 memset(comb, 0, sizeof(*comb)); 6109 key_getcomb_setlifetime(comb); 6110 comb->sadb_comb_encrypt = i; 6111 /* what should we set into sadb_comb_*_{min,max}bits? */ 6112 } 6113 6114 return m; 6115 } 6116 6117 /* 6118 * XXX no way to pass mode (transport/tunnel) to userland 6119 * XXX replay checking? 6120 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6121 */ 6122 static struct mbuf * 6123 key_getprop(const struct secasindex *saidx) 6124 { 6125 struct sadb_prop *prop; 6126 struct mbuf *m, *n; 6127 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6128 int totlen; 6129 6130 switch (saidx->proto) { 6131 case IPPROTO_ESP: 6132 m = key_getcomb_esp(); 6133 break; 6134 case IPPROTO_AH: 6135 m = key_getcomb_ah(); 6136 break; 6137 case IPPROTO_IPCOMP: 6138 m = key_getcomb_ipcomp(); 6139 break; 6140 default: 6141 return NULL; 6142 } 6143 6144 if (!m) 6145 return NULL; 6146 M_PREPEND(m, l, M_DONTWAIT); 6147 if (!m) 6148 return NULL; 6149 6150 totlen = 0; 6151 for (n = m; n; n = n->m_next) 6152 totlen += n->m_len; 6153 6154 prop = mtod(m, struct sadb_prop *); 6155 memset(prop, 0, sizeof(*prop)); 6156 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6157 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6158 prop->sadb_prop_replay = 32; /* XXX */ 6159 6160 return m; 6161 } 6162 6163 /* 6164 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6165 * send 6166 * <base, SA, address(SD), (address(P)), x_policy, 6167 * (identity(SD),) (sensitivity,) proposal> 6168 * to KMD, and expect to receive 6169 * <base> with SADB_ACQUIRE if error occurred, 6170 * or 6171 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6172 * from KMD by PF_KEY. 6173 * 6174 * XXX x_policy is outside of RFC2367 (KAME extension). 6175 * XXX sensitivity is not supported. 6176 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6177 * see comment for key_getcomb_ipcomp(). 6178 * 6179 * OUT: 6180 * 0 : succeed 6181 * others: error number 6182 */ 6183 static int 6184 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6185 { 6186 struct mbuf *result = NULL, *m; 6187 #ifndef IPSEC_NONBLOCK_ACQUIRE 6188 struct secacq *newacq; 6189 #endif 6190 u_int8_t satype; 6191 int error = -1; 6192 u_int32_t seq; 6193 6194 /* sanity check */ 6195 KASSERT(saidx != NULL); 6196 satype = key_proto2satype(saidx->proto); 6197 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6198 6199 #ifndef IPSEC_NONBLOCK_ACQUIRE 6200 /* 6201 * We never do anything about acquirng SA. There is anather 6202 * solution that kernel blocks to send SADB_ACQUIRE message until 6203 * getting something message from IKEd. In later case, to be 6204 * managed with ACQUIRING list. 6205 */ 6206 /* Get an entry to check whether sending message or not. */ 6207 if ((newacq = key_getacq(saidx)) != NULL) { 6208 if (key_blockacq_count < newacq->count) { 6209 /* reset counter and do send message. */ 6210 newacq->count = 0; 6211 } else { 6212 /* increment counter and do nothing. */ 6213 newacq->count++; 6214 return 0; 6215 } 6216 } else { 6217 /* make new entry for blocking to send SADB_ACQUIRE. */ 6218 if ((newacq = key_newacq(saidx)) == NULL) 6219 return ENOBUFS; 6220 6221 /* add to acqtree */ 6222 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6223 } 6224 #endif 6225 6226 6227 #ifndef IPSEC_NONBLOCK_ACQUIRE 6228 seq = newacq->seq; 6229 #else 6230 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6231 #endif 6232 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6233 if (!m) { 6234 error = ENOBUFS; 6235 goto fail; 6236 } 6237 result = m; 6238 6239 /* set sadb_address for saidx's. */ 6240 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6241 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6242 if (!m) { 6243 error = ENOBUFS; 6244 goto fail; 6245 } 6246 m_cat(result, m); 6247 6248 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6249 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6250 if (!m) { 6251 error = ENOBUFS; 6252 goto fail; 6253 } 6254 m_cat(result, m); 6255 6256 /* XXX proxy address (optional) */ 6257 6258 /* set sadb_x_policy */ 6259 if (sp) { 6260 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6261 if (!m) { 6262 error = ENOBUFS; 6263 goto fail; 6264 } 6265 m_cat(result, m); 6266 } 6267 6268 /* XXX identity (optional) */ 6269 #if 0 6270 if (idexttype && fqdn) { 6271 /* create identity extension (FQDN) */ 6272 struct sadb_ident *id; 6273 int fqdnlen; 6274 6275 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6276 id = (struct sadb_ident *)p; 6277 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6278 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6279 id->sadb_ident_exttype = idexttype; 6280 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6281 memcpy(id + 1, fqdn, fqdnlen); 6282 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6283 } 6284 6285 if (idexttype) { 6286 /* create identity extension (USERFQDN) */ 6287 struct sadb_ident *id; 6288 int userfqdnlen; 6289 6290 if (userfqdn) { 6291 /* +1 for terminating-NUL */ 6292 userfqdnlen = strlen(userfqdn) + 1; 6293 } else 6294 userfqdnlen = 0; 6295 id = (struct sadb_ident *)p; 6296 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6297 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6298 id->sadb_ident_exttype = idexttype; 6299 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6300 /* XXX is it correct? */ 6301 if (curlwp) 6302 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6303 if (userfqdn && userfqdnlen) 6304 memcpy(id + 1, userfqdn, userfqdnlen); 6305 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6306 } 6307 #endif 6308 6309 /* XXX sensitivity (optional) */ 6310 6311 /* create proposal/combination extension */ 6312 m = key_getprop(saidx); 6313 #if 0 6314 /* 6315 * spec conformant: always attach proposal/combination extension, 6316 * the problem is that we have no way to attach it for ipcomp, 6317 * due to the way sadb_comb is declared in RFC2367. 6318 */ 6319 if (!m) { 6320 error = ENOBUFS; 6321 goto fail; 6322 } 6323 m_cat(result, m); 6324 #else 6325 /* 6326 * outside of spec; make proposal/combination extension optional. 6327 */ 6328 if (m) 6329 m_cat(result, m); 6330 #endif 6331 6332 if ((result->m_flags & M_PKTHDR) == 0) { 6333 error = EINVAL; 6334 goto fail; 6335 } 6336 6337 if (result->m_len < sizeof(struct sadb_msg)) { 6338 result = m_pullup(result, sizeof(struct sadb_msg)); 6339 if (result == NULL) { 6340 error = ENOBUFS; 6341 goto fail; 6342 } 6343 } 6344 6345 result->m_pkthdr.len = 0; 6346 for (m = result; m; m = m->m_next) 6347 result->m_pkthdr.len += m->m_len; 6348 6349 mtod(result, struct sadb_msg *)->sadb_msg_len = 6350 PFKEY_UNIT64(result->m_pkthdr.len); 6351 6352 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6353 6354 fail: 6355 if (result) 6356 m_freem(result); 6357 return error; 6358 } 6359 6360 #ifndef IPSEC_NONBLOCK_ACQUIRE 6361 static struct secacq * 6362 key_newacq(const struct secasindex *saidx) 6363 { 6364 struct secacq *newacq; 6365 6366 /* get new entry */ 6367 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6368 if (newacq == NULL) { 6369 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6370 return NULL; 6371 } 6372 6373 /* copy secindex */ 6374 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6375 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6376 newacq->created = time_uptime; 6377 newacq->count = 0; 6378 6379 return newacq; 6380 } 6381 6382 static struct secacq * 6383 key_getacq(const struct secasindex *saidx) 6384 { 6385 struct secacq *acq; 6386 6387 LIST_FOREACH(acq, &acqtree, chain) { 6388 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6389 return acq; 6390 } 6391 6392 return NULL; 6393 } 6394 6395 static struct secacq * 6396 key_getacqbyseq(u_int32_t seq) 6397 { 6398 struct secacq *acq; 6399 6400 LIST_FOREACH(acq, &acqtree, chain) { 6401 if (acq->seq == seq) 6402 return acq; 6403 } 6404 6405 return NULL; 6406 } 6407 #endif 6408 6409 static struct secspacq * 6410 key_newspacq(const struct secpolicyindex *spidx) 6411 { 6412 struct secspacq *acq; 6413 6414 /* get new entry */ 6415 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6416 if (acq == NULL) { 6417 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6418 return NULL; 6419 } 6420 6421 /* copy secindex */ 6422 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6423 acq->created = time_uptime; 6424 acq->count = 0; 6425 6426 return acq; 6427 } 6428 6429 static struct secspacq * 6430 key_getspacq(const struct secpolicyindex *spidx) 6431 { 6432 struct secspacq *acq; 6433 6434 LIST_FOREACH(acq, &spacqtree, chain) { 6435 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6436 return acq; 6437 } 6438 6439 return NULL; 6440 } 6441 6442 /* 6443 * SADB_ACQUIRE processing, 6444 * in first situation, is receiving 6445 * <base> 6446 * from the ikmpd, and clear sequence of its secasvar entry. 6447 * 6448 * In second situation, is receiving 6449 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6450 * from a user land process, and return 6451 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6452 * to the socket. 6453 * 6454 * m will always be freed. 6455 */ 6456 static int 6457 key_acquire2(struct socket *so, struct mbuf *m, 6458 const struct sadb_msghdr *mhp) 6459 { 6460 const struct sadb_address *src0, *dst0; 6461 struct secasindex saidx; 6462 struct secashead *sah; 6463 u_int16_t proto; 6464 int error; 6465 6466 KASSERT(so != NULL); 6467 KASSERT(m != NULL); 6468 KASSERT(mhp != NULL); 6469 KASSERT(mhp->msg != NULL); 6470 6471 /* 6472 * Error message from KMd. 6473 * We assume that if error was occurred in IKEd, the length of PFKEY 6474 * message is equal to the size of sadb_msg structure. 6475 * We do not raise error even if error occurred in this function. 6476 */ 6477 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6478 #ifndef IPSEC_NONBLOCK_ACQUIRE 6479 struct secacq *acq; 6480 6481 /* check sequence number */ 6482 if (mhp->msg->sadb_msg_seq == 0) { 6483 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6484 m_freem(m); 6485 return 0; 6486 } 6487 6488 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6489 /* 6490 * the specified larval SA is already gone, or we got 6491 * a bogus sequence number. we can silently ignore it. 6492 */ 6493 m_freem(m); 6494 return 0; 6495 } 6496 6497 /* reset acq counter in order to deletion by timehander. */ 6498 acq->created = time_uptime; 6499 acq->count = 0; 6500 #endif 6501 m_freem(m); 6502 return 0; 6503 } 6504 6505 /* 6506 * This message is from user land. 6507 */ 6508 6509 /* map satype to proto */ 6510 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6511 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6512 return key_senderror(so, m, EINVAL); 6513 } 6514 6515 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6516 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6517 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6518 /* error */ 6519 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6520 return key_senderror(so, m, EINVAL); 6521 } 6522 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6523 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6524 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6525 /* error */ 6526 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6527 return key_senderror(so, m, EINVAL); 6528 } 6529 6530 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6531 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6532 6533 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6534 dst0 + 1, &saidx)) != 0) 6535 return key_senderror(so, m, EINVAL); 6536 6537 if ((error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp)) != 0) 6538 return key_senderror(so, m, EINVAL); 6539 6540 /* get a SA index */ 6541 LIST_FOREACH(sah, &sahtree, chain) { 6542 if (sah->state == SADB_SASTATE_DEAD) 6543 continue; 6544 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6545 break; 6546 } 6547 if (sah != NULL) { 6548 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6549 return key_senderror(so, m, EEXIST); 6550 } 6551 6552 error = key_acquire(&saidx, NULL); 6553 if (error != 0) { 6554 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6555 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6556 return key_senderror(so, m, error); 6557 } 6558 6559 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6560 } 6561 6562 /* 6563 * SADB_REGISTER processing. 6564 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6565 * receive 6566 * <base> 6567 * from the ikmpd, and register a socket to send PF_KEY messages, 6568 * and send 6569 * <base, supported> 6570 * to KMD by PF_KEY. 6571 * If socket is detached, must free from regnode. 6572 * 6573 * m will always be freed. 6574 */ 6575 static int 6576 key_register(struct socket *so, struct mbuf *m, 6577 const struct sadb_msghdr *mhp) 6578 { 6579 struct secreg *reg, *newreg = 0; 6580 6581 KASSERT(!cpu_softintr_p()); 6582 KASSERT(so != NULL); 6583 KASSERT(m != NULL); 6584 KASSERT(mhp != NULL); 6585 KASSERT(mhp->msg != NULL); 6586 6587 /* check for invalid register message */ 6588 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6589 return key_senderror(so, m, EINVAL); 6590 6591 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6592 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6593 goto setmsg; 6594 6595 /* check whether existing or not */ 6596 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6597 if (reg->so == so) { 6598 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6599 return key_senderror(so, m, EEXIST); 6600 } 6601 } 6602 6603 /* create regnode */ 6604 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 6605 6606 newreg->so = so; 6607 ((struct keycb *)sotorawcb(so))->kp_registered++; 6608 6609 /* add regnode to regtree. */ 6610 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6611 6612 setmsg: 6613 { 6614 struct mbuf *n; 6615 struct sadb_msg *newmsg; 6616 struct sadb_supported *sup; 6617 u_int len, alen, elen; 6618 int off; 6619 int i; 6620 struct sadb_alg *alg; 6621 6622 /* create new sadb_msg to reply. */ 6623 alen = 0; 6624 for (i = 1; i <= SADB_AALG_MAX; i++) { 6625 if (ah_algorithm_lookup(i)) 6626 alen += sizeof(struct sadb_alg); 6627 } 6628 if (alen) 6629 alen += sizeof(struct sadb_supported); 6630 elen = 0; 6631 for (i = 1; i <= SADB_EALG_MAX; i++) { 6632 if (esp_algorithm_lookup(i)) 6633 elen += sizeof(struct sadb_alg); 6634 } 6635 if (elen) 6636 elen += sizeof(struct sadb_supported); 6637 6638 len = sizeof(struct sadb_msg) + alen + elen; 6639 6640 if (len > MCLBYTES) 6641 return key_senderror(so, m, ENOBUFS); 6642 6643 MGETHDR(n, M_DONTWAIT, MT_DATA); 6644 if (len > MHLEN) { 6645 MCLGET(n, M_DONTWAIT); 6646 if ((n->m_flags & M_EXT) == 0) { 6647 m_freem(n); 6648 n = NULL; 6649 } 6650 } 6651 if (!n) 6652 return key_senderror(so, m, ENOBUFS); 6653 6654 n->m_pkthdr.len = n->m_len = len; 6655 n->m_next = NULL; 6656 off = 0; 6657 6658 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6659 newmsg = mtod(n, struct sadb_msg *); 6660 newmsg->sadb_msg_errno = 0; 6661 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6662 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6663 6664 /* for authentication algorithm */ 6665 if (alen) { 6666 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6667 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6668 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6669 off += PFKEY_ALIGN8(sizeof(*sup)); 6670 6671 for (i = 1; i <= SADB_AALG_MAX; i++) { 6672 const struct auth_hash *aalgo; 6673 u_int16_t minkeysize, maxkeysize; 6674 6675 aalgo = ah_algorithm_lookup(i); 6676 if (!aalgo) 6677 continue; 6678 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6679 alg->sadb_alg_id = i; 6680 alg->sadb_alg_ivlen = 0; 6681 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6682 alg->sadb_alg_minbits = _BITS(minkeysize); 6683 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6684 off += PFKEY_ALIGN8(sizeof(*alg)); 6685 } 6686 } 6687 6688 /* for encryption algorithm */ 6689 if (elen) { 6690 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6691 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6692 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6693 off += PFKEY_ALIGN8(sizeof(*sup)); 6694 6695 for (i = 1; i <= SADB_EALG_MAX; i++) { 6696 const struct enc_xform *ealgo; 6697 6698 ealgo = esp_algorithm_lookup(i); 6699 if (!ealgo) 6700 continue; 6701 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6702 alg->sadb_alg_id = i; 6703 alg->sadb_alg_ivlen = ealgo->blocksize; 6704 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6705 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6706 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6707 } 6708 } 6709 6710 KASSERTMSG(off == len, "length inconsistency"); 6711 6712 m_freem(m); 6713 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6714 } 6715 } 6716 6717 /* 6718 * free secreg entry registered. 6719 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6720 */ 6721 void 6722 key_freereg(struct socket *so) 6723 { 6724 struct secreg *reg; 6725 int i; 6726 6727 KASSERT(!cpu_softintr_p()); 6728 KASSERT(so != NULL); 6729 6730 /* 6731 * check whether existing or not. 6732 * check all type of SA, because there is a potential that 6733 * one socket is registered to multiple type of SA. 6734 */ 6735 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6736 LIST_FOREACH(reg, ®tree[i], chain) { 6737 if (reg->so == so 6738 && __LIST_CHAINED(reg)) { 6739 LIST_REMOVE(reg, chain); 6740 kmem_free(reg, sizeof(*reg)); 6741 break; 6742 } 6743 } 6744 } 6745 6746 return; 6747 } 6748 6749 /* 6750 * SADB_EXPIRE processing 6751 * send 6752 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6753 * to KMD by PF_KEY. 6754 * NOTE: We send only soft lifetime extension. 6755 * 6756 * OUT: 0 : succeed 6757 * others : error number 6758 */ 6759 static int 6760 key_expire(struct secasvar *sav) 6761 { 6762 int s; 6763 int satype; 6764 struct mbuf *result = NULL, *m; 6765 int len; 6766 int error = -1; 6767 struct sadb_lifetime *lt; 6768 6769 /* XXX: Why do we lock ? */ 6770 s = splsoftnet(); /*called from softclock()*/ 6771 6772 KASSERT(sav != NULL); 6773 KASSERT(sav->sah != NULL); 6774 6775 satype = key_proto2satype(sav->sah->saidx.proto); 6776 KASSERTMSG(satype != 0, "invalid proto is passed"); 6777 6778 /* set msg header */ 6779 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6780 if (!m) { 6781 error = ENOBUFS; 6782 goto fail; 6783 } 6784 result = m; 6785 6786 /* create SA extension */ 6787 m = key_setsadbsa(sav); 6788 if (!m) { 6789 error = ENOBUFS; 6790 goto fail; 6791 } 6792 m_cat(result, m); 6793 6794 /* create SA extension */ 6795 m = key_setsadbxsa2(sav->sah->saidx.mode, 6796 sav->replay ? sav->replay->count : 0, 6797 sav->sah->saidx.reqid); 6798 if (!m) { 6799 error = ENOBUFS; 6800 goto fail; 6801 } 6802 m_cat(result, m); 6803 6804 /* create lifetime extension (current and soft) */ 6805 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6806 m = key_alloc_mbuf(len); 6807 if (!m || m->m_next) { /*XXX*/ 6808 if (m) 6809 m_freem(m); 6810 error = ENOBUFS; 6811 goto fail; 6812 } 6813 memset(mtod(m, void *), 0, len); 6814 lt = mtod(m, struct sadb_lifetime *); 6815 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6816 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6817 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6818 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6819 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime 6820 + time_second - time_uptime; 6821 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime 6822 + time_second - time_uptime; 6823 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6824 memcpy(lt, sav->lft_s, sizeof(*lt)); 6825 m_cat(result, m); 6826 6827 /* set sadb_address for source */ 6828 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6829 &sav->sah->saidx.src.sa, 6830 FULLMASK, IPSEC_ULPROTO_ANY); 6831 if (!m) { 6832 error = ENOBUFS; 6833 goto fail; 6834 } 6835 m_cat(result, m); 6836 6837 /* set sadb_address for destination */ 6838 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6839 &sav->sah->saidx.dst.sa, 6840 FULLMASK, IPSEC_ULPROTO_ANY); 6841 if (!m) { 6842 error = ENOBUFS; 6843 goto fail; 6844 } 6845 m_cat(result, m); 6846 6847 if ((result->m_flags & M_PKTHDR) == 0) { 6848 error = EINVAL; 6849 goto fail; 6850 } 6851 6852 if (result->m_len < sizeof(struct sadb_msg)) { 6853 result = m_pullup(result, sizeof(struct sadb_msg)); 6854 if (result == NULL) { 6855 error = ENOBUFS; 6856 goto fail; 6857 } 6858 } 6859 6860 result->m_pkthdr.len = 0; 6861 for (m = result; m; m = m->m_next) 6862 result->m_pkthdr.len += m->m_len; 6863 6864 mtod(result, struct sadb_msg *)->sadb_msg_len = 6865 PFKEY_UNIT64(result->m_pkthdr.len); 6866 6867 splx(s); 6868 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6869 6870 fail: 6871 if (result) 6872 m_freem(result); 6873 splx(s); 6874 return error; 6875 } 6876 6877 /* 6878 * SADB_FLUSH processing 6879 * receive 6880 * <base> 6881 * from the ikmpd, and free all entries in secastree. 6882 * and send, 6883 * <base> 6884 * to the ikmpd. 6885 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6886 * 6887 * m will always be freed. 6888 */ 6889 static int 6890 key_flush(struct socket *so, struct mbuf *m, 6891 const struct sadb_msghdr *mhp) 6892 { 6893 struct sadb_msg *newmsg; 6894 struct secashead *sah; 6895 struct secasvar *sav, *nextsav; 6896 u_int16_t proto; 6897 u_int8_t state; 6898 6899 KASSERT(so != NULL); 6900 KASSERT(mhp != NULL); 6901 KASSERT(mhp->msg != NULL); 6902 6903 /* map satype to proto */ 6904 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6905 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6906 return key_senderror(so, m, EINVAL); 6907 } 6908 6909 /* no SATYPE specified, i.e. flushing all SA. */ 6910 LIST_FOREACH(sah, &sahtree, chain) { 6911 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6912 && proto != sah->saidx.proto) 6913 continue; 6914 6915 SASTATE_ALIVE_FOREACH(state) { 6916 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, 6917 nextsav) { 6918 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6919 KEY_FREESAV(&sav); 6920 } 6921 } 6922 6923 sah->state = SADB_SASTATE_DEAD; 6924 } 6925 6926 if (m->m_len < sizeof(struct sadb_msg) || 6927 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6928 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 6929 return key_senderror(so, m, ENOBUFS); 6930 } 6931 6932 if (m->m_next) 6933 m_freem(m->m_next); 6934 m->m_next = NULL; 6935 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6936 newmsg = mtod(m, struct sadb_msg *); 6937 newmsg->sadb_msg_errno = 0; 6938 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6939 6940 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6941 } 6942 6943 6944 static struct mbuf * 6945 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 6946 { 6947 struct secashead *sah; 6948 struct secasvar *sav; 6949 u_int16_t proto; 6950 u_int8_t satype; 6951 u_int8_t state; 6952 int cnt; 6953 struct mbuf *m, *n, *prev; 6954 6955 *lenp = 0; 6956 6957 /* map satype to proto */ 6958 if ((proto = key_satype2proto(req_satype)) == 0) { 6959 *errorp = EINVAL; 6960 return (NULL); 6961 } 6962 6963 /* count sav entries to be sent to userland. */ 6964 cnt = 0; 6965 LIST_FOREACH(sah, &sahtree, chain) { 6966 if (req_satype != SADB_SATYPE_UNSPEC && 6967 proto != sah->saidx.proto) 6968 continue; 6969 6970 SASTATE_ANY_FOREACH(state) { 6971 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6972 cnt++; 6973 } 6974 } 6975 } 6976 6977 if (cnt == 0) { 6978 *errorp = ENOENT; 6979 return (NULL); 6980 } 6981 6982 /* send this to the userland, one at a time. */ 6983 m = NULL; 6984 prev = m; 6985 LIST_FOREACH(sah, &sahtree, chain) { 6986 if (req_satype != SADB_SATYPE_UNSPEC && 6987 proto != sah->saidx.proto) 6988 continue; 6989 6990 /* map proto to satype */ 6991 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6992 m_freem(m); 6993 *errorp = EINVAL; 6994 return (NULL); 6995 } 6996 6997 SASTATE_ANY_FOREACH(state) { 6998 LIST_FOREACH(sav, &sah->savtree[state], chain) { 6999 n = key_setdumpsa(sav, SADB_DUMP, satype, 7000 --cnt, pid); 7001 if (!n) { 7002 m_freem(m); 7003 *errorp = ENOBUFS; 7004 return (NULL); 7005 } 7006 7007 if (!m) 7008 m = n; 7009 else 7010 prev->m_nextpkt = n; 7011 prev = n; 7012 } 7013 } 7014 } 7015 7016 if (!m) { 7017 *errorp = EINVAL; 7018 return (NULL); 7019 } 7020 7021 if ((m->m_flags & M_PKTHDR) != 0) { 7022 m->m_pkthdr.len = 0; 7023 for (n = m; n; n = n->m_next) 7024 m->m_pkthdr.len += n->m_len; 7025 } 7026 7027 *errorp = 0; 7028 return (m); 7029 } 7030 7031 /* 7032 * SADB_DUMP processing 7033 * dump all entries including status of DEAD in SAD. 7034 * receive 7035 * <base> 7036 * from the ikmpd, and dump all secasvar leaves 7037 * and send, 7038 * <base> ..... 7039 * to the ikmpd. 7040 * 7041 * m will always be freed. 7042 */ 7043 static int 7044 key_dump(struct socket *so, struct mbuf *m0, 7045 const struct sadb_msghdr *mhp) 7046 { 7047 u_int16_t proto; 7048 u_int8_t satype; 7049 struct mbuf *n; 7050 int s; 7051 int error, len, ok; 7052 7053 KASSERT(so != NULL); 7054 KASSERT(m0 != NULL); 7055 KASSERT(mhp != NULL); 7056 KASSERT(mhp->msg != NULL); 7057 7058 /* map satype to proto */ 7059 satype = mhp->msg->sadb_msg_satype; 7060 if ((proto = key_satype2proto(satype)) == 0) { 7061 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7062 return key_senderror(so, m0, EINVAL); 7063 } 7064 7065 /* 7066 * If the requestor has insufficient socket-buffer space 7067 * for the entire chain, nobody gets any response to the DUMP. 7068 * XXX For now, only the requestor ever gets anything. 7069 * Moreover, if the requestor has any space at all, they receive 7070 * the entire chain, otherwise the request is refused with ENOBUFS. 7071 */ 7072 if (sbspace(&so->so_rcv) <= 0) { 7073 return key_senderror(so, m0, ENOBUFS); 7074 } 7075 7076 s = splsoftnet(); 7077 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7078 splx(s); 7079 7080 if (n == NULL) { 7081 return key_senderror(so, m0, ENOENT); 7082 } 7083 { 7084 uint64_t *ps = PFKEY_STAT_GETREF(); 7085 ps[PFKEY_STAT_IN_TOTAL]++; 7086 ps[PFKEY_STAT_IN_BYTES] += len; 7087 PFKEY_STAT_PUTREF(); 7088 } 7089 7090 /* 7091 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7092 * The requestor receives either the entire chain, or an 7093 * error message with ENOBUFS. 7094 * 7095 * sbappendaddrchain() takes the chain of entries, one 7096 * packet-record per SPD entry, prepends the key_src sockaddr 7097 * to each packet-record, links the sockaddr mbufs into a new 7098 * list of records, then appends the entire resulting 7099 * list to the requesting socket. 7100 */ 7101 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7102 n, SB_PRIO_ONESHOT_OVERFLOW); 7103 7104 if (!ok) { 7105 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7106 m_freem(n); 7107 return key_senderror(so, m0, ENOBUFS); 7108 } 7109 7110 m_freem(m0); 7111 return 0; 7112 } 7113 7114 /* 7115 * SADB_X_PROMISC processing 7116 * 7117 * m will always be freed. 7118 */ 7119 static int 7120 key_promisc(struct socket *so, struct mbuf *m, 7121 const struct sadb_msghdr *mhp) 7122 { 7123 int olen; 7124 7125 KASSERT(so != NULL); 7126 KASSERT(m != NULL); 7127 KASSERT(mhp != NULL); 7128 KASSERT(mhp->msg != NULL); 7129 7130 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7131 7132 if (olen < sizeof(struct sadb_msg)) { 7133 #if 1 7134 return key_senderror(so, m, EINVAL); 7135 #else 7136 m_freem(m); 7137 return 0; 7138 #endif 7139 } else if (olen == sizeof(struct sadb_msg)) { 7140 /* enable/disable promisc mode */ 7141 struct keycb *kp; 7142 7143 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7144 return key_senderror(so, m, EINVAL); 7145 mhp->msg->sadb_msg_errno = 0; 7146 switch (mhp->msg->sadb_msg_satype) { 7147 case 0: 7148 case 1: 7149 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7150 break; 7151 default: 7152 return key_senderror(so, m, EINVAL); 7153 } 7154 7155 /* send the original message back to everyone */ 7156 mhp->msg->sadb_msg_errno = 0; 7157 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7158 } else { 7159 /* send packet as is */ 7160 7161 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7162 7163 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7164 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7165 } 7166 } 7167 7168 static int (*key_typesw[]) (struct socket *, struct mbuf *, 7169 const struct sadb_msghdr *) = { 7170 NULL, /* SADB_RESERVED */ 7171 key_getspi, /* SADB_GETSPI */ 7172 key_update, /* SADB_UPDATE */ 7173 key_add, /* SADB_ADD */ 7174 key_delete, /* SADB_DELETE */ 7175 key_get, /* SADB_GET */ 7176 key_acquire2, /* SADB_ACQUIRE */ 7177 key_register, /* SADB_REGISTER */ 7178 NULL, /* SADB_EXPIRE */ 7179 key_flush, /* SADB_FLUSH */ 7180 key_dump, /* SADB_DUMP */ 7181 key_promisc, /* SADB_X_PROMISC */ 7182 NULL, /* SADB_X_PCHANGE */ 7183 key_spdadd, /* SADB_X_SPDUPDATE */ 7184 key_spdadd, /* SADB_X_SPDADD */ 7185 key_spddelete, /* SADB_X_SPDDELETE */ 7186 key_spdget, /* SADB_X_SPDGET */ 7187 NULL, /* SADB_X_SPDACQUIRE */ 7188 key_spddump, /* SADB_X_SPDDUMP */ 7189 key_spdflush, /* SADB_X_SPDFLUSH */ 7190 key_spdadd, /* SADB_X_SPDSETIDX */ 7191 NULL, /* SADB_X_SPDEXPIRE */ 7192 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7193 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7194 }; 7195 7196 /* 7197 * parse sadb_msg buffer to process PFKEYv2, 7198 * and create a data to response if needed. 7199 * I think to be dealed with mbuf directly. 7200 * IN: 7201 * msgp : pointer to pointer to a received buffer pulluped. 7202 * This is rewrited to response. 7203 * so : pointer to socket. 7204 * OUT: 7205 * length for buffer to send to user process. 7206 */ 7207 int 7208 key_parse(struct mbuf *m, struct socket *so) 7209 { 7210 struct sadb_msg *msg; 7211 struct sadb_msghdr mh; 7212 u_int orglen; 7213 int error; 7214 int target; 7215 7216 KASSERT(m != NULL); 7217 KASSERT(so != NULL); 7218 7219 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7220 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7221 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7222 kdebug_sadb(msg); 7223 } 7224 #endif 7225 7226 if (m->m_len < sizeof(struct sadb_msg)) { 7227 m = m_pullup(m, sizeof(struct sadb_msg)); 7228 if (!m) 7229 return ENOBUFS; 7230 } 7231 msg = mtod(m, struct sadb_msg *); 7232 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7233 target = KEY_SENDUP_ONE; 7234 7235 if ((m->m_flags & M_PKTHDR) == 0 || 7236 m->m_pkthdr.len != orglen) { 7237 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7238 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7239 error = EINVAL; 7240 goto senderror; 7241 } 7242 7243 if (msg->sadb_msg_version != PF_KEY_V2) { 7244 ipseclog((LOG_DEBUG, 7245 "key_parse: PF_KEY version %u is mismatched.\n", 7246 msg->sadb_msg_version)); 7247 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7248 error = EINVAL; 7249 goto senderror; 7250 } 7251 7252 if (msg->sadb_msg_type > SADB_MAX) { 7253 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7254 msg->sadb_msg_type)); 7255 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7256 error = EINVAL; 7257 goto senderror; 7258 } 7259 7260 /* for old-fashioned code - should be nuked */ 7261 if (m->m_pkthdr.len > MCLBYTES) { 7262 m_freem(m); 7263 return ENOBUFS; 7264 } 7265 if (m->m_next) { 7266 struct mbuf *n; 7267 7268 MGETHDR(n, M_DONTWAIT, MT_DATA); 7269 if (n && m->m_pkthdr.len > MHLEN) { 7270 MCLGET(n, M_DONTWAIT); 7271 if ((n->m_flags & M_EXT) == 0) { 7272 m_free(n); 7273 n = NULL; 7274 } 7275 } 7276 if (!n) { 7277 m_freem(m); 7278 return ENOBUFS; 7279 } 7280 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7281 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7282 n->m_next = NULL; 7283 m_freem(m); 7284 m = n; 7285 } 7286 7287 /* align the mbuf chain so that extensions are in contiguous region. */ 7288 error = key_align(m, &mh); 7289 if (error) 7290 return error; 7291 7292 if (m->m_next) { /*XXX*/ 7293 m_freem(m); 7294 return ENOBUFS; 7295 } 7296 7297 msg = mh.msg; 7298 7299 /* check SA type */ 7300 switch (msg->sadb_msg_satype) { 7301 case SADB_SATYPE_UNSPEC: 7302 switch (msg->sadb_msg_type) { 7303 case SADB_GETSPI: 7304 case SADB_UPDATE: 7305 case SADB_ADD: 7306 case SADB_DELETE: 7307 case SADB_GET: 7308 case SADB_ACQUIRE: 7309 case SADB_EXPIRE: 7310 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7311 "when msg type=%u.\n", msg->sadb_msg_type)); 7312 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7313 error = EINVAL; 7314 goto senderror; 7315 } 7316 break; 7317 case SADB_SATYPE_AH: 7318 case SADB_SATYPE_ESP: 7319 case SADB_X_SATYPE_IPCOMP: 7320 case SADB_X_SATYPE_TCPSIGNATURE: 7321 switch (msg->sadb_msg_type) { 7322 case SADB_X_SPDADD: 7323 case SADB_X_SPDDELETE: 7324 case SADB_X_SPDGET: 7325 case SADB_X_SPDDUMP: 7326 case SADB_X_SPDFLUSH: 7327 case SADB_X_SPDSETIDX: 7328 case SADB_X_SPDUPDATE: 7329 case SADB_X_SPDDELETE2: 7330 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7331 msg->sadb_msg_type)); 7332 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7333 error = EINVAL; 7334 goto senderror; 7335 } 7336 break; 7337 case SADB_SATYPE_RSVP: 7338 case SADB_SATYPE_OSPFV2: 7339 case SADB_SATYPE_RIPV2: 7340 case SADB_SATYPE_MIP: 7341 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7342 msg->sadb_msg_satype)); 7343 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7344 error = EOPNOTSUPP; 7345 goto senderror; 7346 case 1: /* XXX: What does it do? */ 7347 if (msg->sadb_msg_type == SADB_X_PROMISC) 7348 break; 7349 /*FALLTHROUGH*/ 7350 default: 7351 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7352 msg->sadb_msg_satype)); 7353 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7354 error = EINVAL; 7355 goto senderror; 7356 } 7357 7358 /* check field of upper layer protocol and address family */ 7359 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7360 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7361 struct sadb_address *src0, *dst0; 7362 u_int plen; 7363 7364 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7365 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7366 7367 /* check upper layer protocol */ 7368 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7369 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7370 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7371 error = EINVAL; 7372 goto senderror; 7373 } 7374 7375 /* check family */ 7376 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7377 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7378 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7379 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7380 error = EINVAL; 7381 goto senderror; 7382 } 7383 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7384 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7385 ipseclog((LOG_DEBUG, 7386 "key_parse: address struct size mismatched.\n")); 7387 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7388 error = EINVAL; 7389 goto senderror; 7390 } 7391 7392 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7393 case AF_INET: 7394 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7395 sizeof(struct sockaddr_in)) { 7396 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7397 error = EINVAL; 7398 goto senderror; 7399 } 7400 break; 7401 case AF_INET6: 7402 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7403 sizeof(struct sockaddr_in6)) { 7404 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7405 error = EINVAL; 7406 goto senderror; 7407 } 7408 break; 7409 default: 7410 ipseclog((LOG_DEBUG, 7411 "key_parse: unsupported address family.\n")); 7412 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7413 error = EAFNOSUPPORT; 7414 goto senderror; 7415 } 7416 7417 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7418 case AF_INET: 7419 plen = sizeof(struct in_addr) << 3; 7420 break; 7421 case AF_INET6: 7422 plen = sizeof(struct in6_addr) << 3; 7423 break; 7424 default: 7425 plen = 0; /*fool gcc*/ 7426 break; 7427 } 7428 7429 /* check max prefix length */ 7430 if (src0->sadb_address_prefixlen > plen || 7431 dst0->sadb_address_prefixlen > plen) { 7432 ipseclog((LOG_DEBUG, 7433 "key_parse: illegal prefixlen.\n")); 7434 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7435 error = EINVAL; 7436 goto senderror; 7437 } 7438 7439 /* 7440 * prefixlen == 0 is valid because there can be a case when 7441 * all addresses are matched. 7442 */ 7443 } 7444 7445 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7446 key_typesw[msg->sadb_msg_type] == NULL) { 7447 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7448 error = EINVAL; 7449 goto senderror; 7450 } 7451 7452 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7453 7454 senderror: 7455 msg->sadb_msg_errno = error; 7456 return key_sendup_mbuf(so, m, target); 7457 } 7458 7459 static int 7460 key_senderror(struct socket *so, struct mbuf *m, int code) 7461 { 7462 struct sadb_msg *msg; 7463 7464 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7465 7466 msg = mtod(m, struct sadb_msg *); 7467 msg->sadb_msg_errno = code; 7468 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7469 } 7470 7471 /* 7472 * set the pointer to each header into message buffer. 7473 * m will be freed on error. 7474 * XXX larger-than-MCLBYTES extension? 7475 */ 7476 static int 7477 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7478 { 7479 struct mbuf *n; 7480 struct sadb_ext *ext; 7481 size_t off, end; 7482 int extlen; 7483 int toff; 7484 7485 KASSERT(m != NULL); 7486 KASSERT(mhp != NULL); 7487 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7488 7489 /* initialize */ 7490 memset(mhp, 0, sizeof(*mhp)); 7491 7492 mhp->msg = mtod(m, struct sadb_msg *); 7493 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7494 7495 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7496 extlen = end; /*just in case extlen is not updated*/ 7497 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7498 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7499 if (!n) { 7500 /* m is already freed */ 7501 return ENOBUFS; 7502 } 7503 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7504 7505 /* set pointer */ 7506 switch (ext->sadb_ext_type) { 7507 case SADB_EXT_SA: 7508 case SADB_EXT_ADDRESS_SRC: 7509 case SADB_EXT_ADDRESS_DST: 7510 case SADB_EXT_ADDRESS_PROXY: 7511 case SADB_EXT_LIFETIME_CURRENT: 7512 case SADB_EXT_LIFETIME_HARD: 7513 case SADB_EXT_LIFETIME_SOFT: 7514 case SADB_EXT_KEY_AUTH: 7515 case SADB_EXT_KEY_ENCRYPT: 7516 case SADB_EXT_IDENTITY_SRC: 7517 case SADB_EXT_IDENTITY_DST: 7518 case SADB_EXT_SENSITIVITY: 7519 case SADB_EXT_PROPOSAL: 7520 case SADB_EXT_SUPPORTED_AUTH: 7521 case SADB_EXT_SUPPORTED_ENCRYPT: 7522 case SADB_EXT_SPIRANGE: 7523 case SADB_X_EXT_POLICY: 7524 case SADB_X_EXT_SA2: 7525 case SADB_X_EXT_NAT_T_TYPE: 7526 case SADB_X_EXT_NAT_T_SPORT: 7527 case SADB_X_EXT_NAT_T_DPORT: 7528 case SADB_X_EXT_NAT_T_OAI: 7529 case SADB_X_EXT_NAT_T_OAR: 7530 case SADB_X_EXT_NAT_T_FRAG: 7531 /* duplicate check */ 7532 /* 7533 * XXX Are there duplication payloads of either 7534 * KEY_AUTH or KEY_ENCRYPT ? 7535 */ 7536 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7537 ipseclog((LOG_DEBUG, 7538 "key_align: duplicate ext_type %u " 7539 "is passed.\n", ext->sadb_ext_type)); 7540 m_freem(m); 7541 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7542 return EINVAL; 7543 } 7544 break; 7545 default: 7546 ipseclog((LOG_DEBUG, 7547 "key_align: 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 >= sizeof(minsize) / sizeof(minsize[0]) || 7596 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 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 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7646 7647 callout_init(&key_timehandler_ch, 0); 7648 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 7649 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 7650 if (error != 0) 7651 panic("%s: workqueue_create failed (%d)\n", __func__, error); 7652 7653 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7654 LIST_INIT(&sptree[i]); 7655 } 7656 7657 LIST_INIT(&sahtree); 7658 7659 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7660 LIST_INIT(®tree[i]); 7661 } 7662 7663 #ifndef IPSEC_NONBLOCK_ACQUIRE 7664 LIST_INIT(&acqtree); 7665 #endif 7666 LIST_INIT(&spacqtree); 7667 7668 /* system default */ 7669 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7670 ip4_def_policy.refcnt++; /*never reclaim this*/ 7671 7672 #ifdef INET6 7673 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7674 ip6_def_policy.refcnt++; /*never reclaim this*/ 7675 #endif 7676 7677 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7678 7679 /* initialize key statistics */ 7680 keystat.getspi_count = 1; 7681 7682 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7683 7684 return (0); 7685 } 7686 7687 void 7688 key_init(void) 7689 { 7690 static ONCE_DECL(key_init_once); 7691 7692 sysctl_net_keyv2_setup(NULL); 7693 sysctl_net_key_compat_setup(NULL); 7694 7695 RUN_ONCE(&key_init_once, key_do_init); 7696 } 7697 7698 /* 7699 * XXX: maybe This function is called after INBOUND IPsec processing. 7700 * 7701 * Special check for tunnel-mode packets. 7702 * We must make some checks for consistency between inner and outer IP header. 7703 * 7704 * xxx more checks to be provided 7705 */ 7706 int 7707 key_checktunnelsanity( 7708 struct secasvar *sav, 7709 u_int family, 7710 void *src, 7711 void *dst 7712 ) 7713 { 7714 7715 KASSERT(sav->sah != NULL); 7716 7717 /* XXX: check inner IP header */ 7718 7719 return 1; 7720 } 7721 7722 #if 0 7723 #define hostnamelen strlen(hostname) 7724 7725 /* 7726 * Get FQDN for the host. 7727 * If the administrator configured hostname (by hostname(1)) without 7728 * domain name, returns nothing. 7729 */ 7730 static const char * 7731 key_getfqdn(void) 7732 { 7733 int i; 7734 int hasdot; 7735 static char fqdn[MAXHOSTNAMELEN + 1]; 7736 7737 if (!hostnamelen) 7738 return NULL; 7739 7740 /* check if it comes with domain name. */ 7741 hasdot = 0; 7742 for (i = 0; i < hostnamelen; i++) { 7743 if (hostname[i] == '.') 7744 hasdot++; 7745 } 7746 if (!hasdot) 7747 return NULL; 7748 7749 /* NOTE: hostname may not be NUL-terminated. */ 7750 memset(fqdn, 0, sizeof(fqdn)); 7751 memcpy(fqdn, hostname, hostnamelen); 7752 fqdn[hostnamelen] = '\0'; 7753 return fqdn; 7754 } 7755 7756 /* 7757 * get username@FQDN for the host/user. 7758 */ 7759 static const char * 7760 key_getuserfqdn(void) 7761 { 7762 const char *host; 7763 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7764 struct proc *p = curproc; 7765 char *q; 7766 7767 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7768 return NULL; 7769 if (!(host = key_getfqdn())) 7770 return NULL; 7771 7772 /* NOTE: s_login may not be-NUL terminated. */ 7773 memset(userfqdn, 0, sizeof(userfqdn)); 7774 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7775 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7776 q = userfqdn + strlen(userfqdn); 7777 *q++ = '@'; 7778 memcpy(q, host, strlen(host)); 7779 q += strlen(host); 7780 *q++ = '\0'; 7781 7782 return userfqdn; 7783 } 7784 #endif 7785 7786 /* record data transfer on SA, and update timestamps */ 7787 void 7788 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7789 { 7790 7791 KASSERT(sav != NULL); 7792 KASSERT(m != NULL); 7793 if (!sav->lft_c) 7794 return; 7795 7796 /* 7797 * XXX Currently, there is a difference of bytes size 7798 * between inbound and outbound processing. 7799 */ 7800 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7801 /* to check bytes lifetime is done in key_timehandler(). */ 7802 7803 /* 7804 * We use the number of packets as the unit of 7805 * sadb_lifetime_allocations. We increment the variable 7806 * whenever {esp,ah}_{in,out}put is called. 7807 */ 7808 sav->lft_c->sadb_lifetime_allocations++; 7809 /* XXX check for expires? */ 7810 7811 /* 7812 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7813 * in seconds. HARD and SOFT lifetime are measured by the time 7814 * difference (again in seconds) from sadb_lifetime_usetime. 7815 * 7816 * usetime 7817 * v expire expire 7818 * -----+-----+--------+---> t 7819 * <--------------> HARD 7820 * <-----> SOFT 7821 */ 7822 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7823 /* XXX check for expires? */ 7824 7825 return; 7826 } 7827 7828 /* dumb version */ 7829 void 7830 key_sa_routechange(struct sockaddr *dst) 7831 { 7832 struct secashead *sah; 7833 struct route *ro; 7834 const struct sockaddr *sa; 7835 7836 LIST_FOREACH(sah, &sahtree, chain) { 7837 ro = &sah->sa_route; 7838 sa = rtcache_getdst(ro); 7839 if (sa != NULL && dst->sa_len == sa->sa_len && 7840 memcmp(dst, sa, dst->sa_len) == 0) 7841 rtcache_free(ro); 7842 } 7843 7844 return; 7845 } 7846 7847 static void 7848 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7849 { 7850 7851 KASSERT(sav != NULL); 7852 7853 if (sav->state == state) 7854 return; 7855 7856 if (__LIST_CHAINED(sav)) 7857 LIST_REMOVE(sav, chain); 7858 7859 sav->state = state; 7860 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7861 } 7862 7863 /* XXX too much? */ 7864 static struct mbuf * 7865 key_alloc_mbuf(int l) 7866 { 7867 struct mbuf *m = NULL, *n; 7868 int len, t; 7869 7870 len = l; 7871 while (len > 0) { 7872 MGET(n, M_DONTWAIT, MT_DATA); 7873 if (n && len > MLEN) 7874 MCLGET(n, M_DONTWAIT); 7875 if (!n) { 7876 m_freem(m); 7877 return NULL; 7878 } 7879 7880 n->m_next = NULL; 7881 n->m_len = 0; 7882 n->m_len = M_TRAILINGSPACE(n); 7883 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7884 if (n->m_len > len) { 7885 t = (n->m_len - len) & ~(sizeof(long) - 1); 7886 n->m_data += t; 7887 n->m_len = len; 7888 } 7889 7890 len -= n->m_len; 7891 7892 if (m) 7893 m_cat(m, n); 7894 else 7895 m = n; 7896 } 7897 7898 return m; 7899 } 7900 7901 static struct mbuf * 7902 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 7903 { 7904 struct secashead *sah; 7905 struct secasvar *sav; 7906 u_int16_t proto; 7907 u_int8_t satype; 7908 u_int8_t state; 7909 int cnt; 7910 struct mbuf *m, *n; 7911 7912 /* map satype to proto */ 7913 if ((proto = key_satype2proto(req_satype)) == 0) { 7914 *errorp = EINVAL; 7915 return (NULL); 7916 } 7917 7918 /* count sav entries to be sent to the userland. */ 7919 cnt = 0; 7920 LIST_FOREACH(sah, &sahtree, chain) { 7921 if (req_satype != SADB_SATYPE_UNSPEC && 7922 proto != sah->saidx.proto) 7923 continue; 7924 7925 SASTATE_ANY_FOREACH(state) { 7926 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7927 cnt++; 7928 } 7929 } 7930 } 7931 7932 if (cnt == 0) { 7933 *errorp = ENOENT; 7934 return (NULL); 7935 } 7936 7937 /* send this to the userland, one at a time. */ 7938 m = NULL; 7939 LIST_FOREACH(sah, &sahtree, chain) { 7940 if (req_satype != SADB_SATYPE_UNSPEC && 7941 proto != sah->saidx.proto) 7942 continue; 7943 7944 /* map proto to satype */ 7945 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7946 m_freem(m); 7947 *errorp = EINVAL; 7948 return (NULL); 7949 } 7950 7951 SASTATE_ANY_FOREACH(state) { 7952 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7953 n = key_setdumpsa(sav, SADB_DUMP, satype, 7954 --cnt, pid); 7955 if (!n) { 7956 m_freem(m); 7957 *errorp = ENOBUFS; 7958 return (NULL); 7959 } 7960 7961 if (!m) 7962 m = n; 7963 else 7964 m_cat(m, n); 7965 } 7966 } 7967 } 7968 7969 if (!m) { 7970 *errorp = EINVAL; 7971 return (NULL); 7972 } 7973 7974 if ((m->m_flags & M_PKTHDR) != 0) { 7975 m->m_pkthdr.len = 0; 7976 for (n = m; n; n = n->m_next) 7977 m->m_pkthdr.len += n->m_len; 7978 } 7979 7980 *errorp = 0; 7981 return (m); 7982 } 7983 7984 static struct mbuf * 7985 key_setspddump(int *errorp, pid_t pid) 7986 { 7987 struct secpolicy *sp; 7988 int cnt; 7989 u_int dir; 7990 struct mbuf *m, *n; 7991 7992 /* search SPD entry and get buffer size. */ 7993 cnt = 0; 7994 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 7995 LIST_FOREACH(sp, &sptree[dir], chain) { 7996 cnt++; 7997 } 7998 } 7999 8000 if (cnt == 0) { 8001 *errorp = ENOENT; 8002 return (NULL); 8003 } 8004 8005 m = NULL; 8006 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8007 LIST_FOREACH(sp, &sptree[dir], chain) { 8008 --cnt; 8009 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8010 8011 if (!n) { 8012 *errorp = ENOBUFS; 8013 m_freem(m); 8014 return (NULL); 8015 } 8016 if (!m) 8017 m = n; 8018 else { 8019 m->m_pkthdr.len += n->m_pkthdr.len; 8020 m_cat(m, n); 8021 } 8022 } 8023 } 8024 8025 *errorp = 0; 8026 return (m); 8027 } 8028 8029 int 8030 key_get_used(void) { 8031 return !LIST_EMPTY(&sptree[IPSEC_DIR_INBOUND]) || 8032 !LIST_EMPTY(&sptree[IPSEC_DIR_OUTBOUND]); 8033 } 8034 8035 void 8036 key_update_used(void) 8037 { 8038 switch (ipsec_enabled) { 8039 default: 8040 case 0: 8041 #ifdef notyet 8042 /* XXX: racy */ 8043 ipsec_used = 0; 8044 #endif 8045 break; 8046 case 1: 8047 #ifndef notyet 8048 /* XXX: racy */ 8049 if (!ipsec_used) 8050 #endif 8051 ipsec_used = key_get_used(); 8052 break; 8053 case 2: 8054 ipsec_used = 1; 8055 break; 8056 } 8057 } 8058 8059 static int 8060 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8061 { 8062 struct mbuf *m, *n; 8063 int err2 = 0; 8064 char *p, *ep; 8065 size_t len; 8066 int s, error; 8067 8068 if (newp) 8069 return (EPERM); 8070 if (namelen != 1) 8071 return (EINVAL); 8072 8073 s = splsoftnet(); 8074 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8075 splx(s); 8076 if (!m) 8077 return (error); 8078 if (!oldp) 8079 *oldlenp = m->m_pkthdr.len; 8080 else { 8081 p = oldp; 8082 if (*oldlenp < m->m_pkthdr.len) { 8083 err2 = ENOMEM; 8084 ep = p + *oldlenp; 8085 } else { 8086 *oldlenp = m->m_pkthdr.len; 8087 ep = p + m->m_pkthdr.len; 8088 } 8089 for (n = m; n; n = n->m_next) { 8090 len = (ep - p < n->m_len) ? 8091 ep - p : n->m_len; 8092 error = copyout(mtod(n, const void *), p, len); 8093 p += len; 8094 if (error) 8095 break; 8096 } 8097 if (error == 0) 8098 error = err2; 8099 } 8100 m_freem(m); 8101 8102 return (error); 8103 } 8104 8105 static int 8106 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8107 { 8108 struct mbuf *m, *n; 8109 int err2 = 0; 8110 char *p, *ep; 8111 size_t len; 8112 int s, error; 8113 8114 if (newp) 8115 return (EPERM); 8116 if (namelen != 0) 8117 return (EINVAL); 8118 8119 s = splsoftnet(); 8120 m = key_setspddump(&error, l->l_proc->p_pid); 8121 splx(s); 8122 if (!m) 8123 return (error); 8124 if (!oldp) 8125 *oldlenp = m->m_pkthdr.len; 8126 else { 8127 p = oldp; 8128 if (*oldlenp < m->m_pkthdr.len) { 8129 err2 = ENOMEM; 8130 ep = p + *oldlenp; 8131 } else { 8132 *oldlenp = m->m_pkthdr.len; 8133 ep = p + m->m_pkthdr.len; 8134 } 8135 for (n = m; n; n = n->m_next) { 8136 len = (ep - p < n->m_len) ? 8137 ep - p : n->m_len; 8138 error = copyout(mtod(n, const void *), p, len); 8139 p += len; 8140 if (error) 8141 break; 8142 } 8143 if (error == 0) 8144 error = err2; 8145 } 8146 m_freem(m); 8147 8148 return (error); 8149 } 8150 8151 /* 8152 * Create sysctl tree for native IPSEC key knobs, originally 8153 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8154 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8155 * and in any case the part of our sysctl namespace used for dumping the 8156 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8157 * namespace, for API reasons. 8158 * 8159 * Pending a consensus on the right way to fix this, add a level of 8160 * indirection in how we number the `native' IPSEC key nodes; 8161 * and (as requested by Andrew Brown) move registration of the 8162 * KAME-compatible names to a separate function. 8163 */ 8164 #if 0 8165 # define IPSEC_PFKEY PF_KEY_V2 8166 # define IPSEC_PFKEY_NAME "keyv2" 8167 #else 8168 # define IPSEC_PFKEY PF_KEY 8169 # define IPSEC_PFKEY_NAME "key" 8170 #endif 8171 8172 static int 8173 sysctl_net_key_stats(SYSCTLFN_ARGS) 8174 { 8175 8176 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8177 } 8178 8179 static void 8180 sysctl_net_keyv2_setup(struct sysctllog **clog) 8181 { 8182 8183 sysctl_createv(clog, 0, NULL, NULL, 8184 CTLFLAG_PERMANENT, 8185 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8186 NULL, 0, NULL, 0, 8187 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8188 8189 sysctl_createv(clog, 0, NULL, NULL, 8190 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8191 CTLTYPE_INT, "debug", NULL, 8192 NULL, 0, &key_debug_level, 0, 8193 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8194 sysctl_createv(clog, 0, NULL, NULL, 8195 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8196 CTLTYPE_INT, "spi_try", NULL, 8197 NULL, 0, &key_spi_trycnt, 0, 8198 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8199 sysctl_createv(clog, 0, NULL, NULL, 8200 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8201 CTLTYPE_INT, "spi_min_value", NULL, 8202 NULL, 0, &key_spi_minval, 0, 8203 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8204 sysctl_createv(clog, 0, NULL, NULL, 8205 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8206 CTLTYPE_INT, "spi_max_value", NULL, 8207 NULL, 0, &key_spi_maxval, 0, 8208 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8209 sysctl_createv(clog, 0, NULL, NULL, 8210 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8211 CTLTYPE_INT, "random_int", NULL, 8212 NULL, 0, &key_int_random, 0, 8213 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8214 sysctl_createv(clog, 0, NULL, NULL, 8215 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8216 CTLTYPE_INT, "larval_lifetime", NULL, 8217 NULL, 0, &key_larval_lifetime, 0, 8218 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8219 sysctl_createv(clog, 0, NULL, NULL, 8220 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8221 CTLTYPE_INT, "blockacq_count", NULL, 8222 NULL, 0, &key_blockacq_count, 0, 8223 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8224 sysctl_createv(clog, 0, NULL, NULL, 8225 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8226 CTLTYPE_INT, "blockacq_lifetime", NULL, 8227 NULL, 0, &key_blockacq_lifetime, 0, 8228 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8229 sysctl_createv(clog, 0, NULL, NULL, 8230 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8231 CTLTYPE_INT, "esp_keymin", NULL, 8232 NULL, 0, &ipsec_esp_keymin, 0, 8233 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8234 sysctl_createv(clog, 0, NULL, NULL, 8235 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8236 CTLTYPE_INT, "prefered_oldsa", NULL, 8237 NULL, 0, &key_prefered_oldsa, 0, 8238 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8239 sysctl_createv(clog, 0, NULL, NULL, 8240 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8241 CTLTYPE_INT, "esp_auth", NULL, 8242 NULL, 0, &ipsec_esp_auth, 0, 8243 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8244 sysctl_createv(clog, 0, NULL, NULL, 8245 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8246 CTLTYPE_INT, "ah_keymin", NULL, 8247 NULL, 0, &ipsec_ah_keymin, 0, 8248 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8249 sysctl_createv(clog, 0, NULL, NULL, 8250 CTLFLAG_PERMANENT, 8251 CTLTYPE_STRUCT, "stats", 8252 SYSCTL_DESCR("PF_KEY statistics"), 8253 sysctl_net_key_stats, 0, NULL, 0, 8254 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8255 } 8256 8257 /* 8258 * Register sysctl names used by setkey(8). For historical reasons, 8259 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8260 * for both IPSEC and KAME IPSEC. 8261 */ 8262 static void 8263 sysctl_net_key_compat_setup(struct sysctllog **clog) 8264 { 8265 8266 sysctl_createv(clog, 0, NULL, NULL, 8267 CTLFLAG_PERMANENT, 8268 CTLTYPE_NODE, "key", NULL, 8269 NULL, 0, NULL, 0, 8270 CTL_NET, PF_KEY, CTL_EOL); 8271 8272 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8273 sysctl_createv(clog, 0, NULL, NULL, 8274 CTLFLAG_PERMANENT, 8275 CTLTYPE_STRUCT, "dumpsa", NULL, 8276 sysctl_net_key_dumpsa, 0, NULL, 0, 8277 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8278 sysctl_createv(clog, 0, NULL, NULL, 8279 CTLFLAG_PERMANENT, 8280 CTLTYPE_STRUCT, "dumpsp", NULL, 8281 sysctl_net_key_dumpsp, 0, NULL, 0, 8282 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8283 } 8284
Indexes created Tue Sep 23 02:09:52 GMT 2025