key.c revision 1.48
1 /* $NetBSD: key.c,v 1.48 2007/06/27 20:38:33 degroote 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 1.48 2007/06/27 20:38:33 degroote Exp $"); 36 37 /* 38 * This code is referd to RFC 2367 39 */ 40 41 #include "opt_inet.h" 42 #ifdef __FreeBSD__ 43 #include "opt_inet6.h" 44 #endif 45 #include "opt_ipsec.h" 46 #ifdef __NetBSD__ 47 #include "opt_gateway.h" 48 #endif 49 50 #include <sys/types.h> 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/callout.h> 54 #include <sys/kernel.h> 55 #include <sys/mbuf.h> 56 #include <sys/domain.h> 57 #include <sys/protosw.h> 58 #include <sys/malloc.h> 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/sysctl.h> 62 #include <sys/errno.h> 63 #include <sys/proc.h> 64 #include <sys/queue.h> 65 #include <sys/syslog.h> 66 67 #include <net/if.h> 68 #include <net/route.h> 69 #include <net/raw_cb.h> 70 71 #include <netinet/in.h> 72 #include <netinet/in_systm.h> 73 #include <netinet/ip.h> 74 #include <netinet/in_var.h> 75 #ifdef INET 76 #include <netinet/ip_var.h> 77 #endif 78 79 #ifdef INET6 80 #include <netinet/ip6.h> 81 #include <netinet6/in6_var.h> 82 #include <netinet6/ip6_var.h> 83 #endif /* INET6 */ 84 85 #ifdef INET 86 #include <netinet/in_pcb.h> 87 #endif 88 #ifdef INET6 89 #include <netinet6/in6_pcb.h> 90 #endif /* INET6 */ 91 92 #include <net/pfkeyv2.h> 93 #include <netipsec/keydb.h> 94 #include <netipsec/key.h> 95 #include <netipsec/keysock.h> 96 #include <netipsec/key_debug.h> 97 98 #include <netipsec/ipsec.h> 99 #ifdef INET6 100 #include <netipsec/ipsec6.h> 101 #endif 102 103 #include <netipsec/xform.h> 104 #include <netipsec/ipsec_osdep.h> 105 #include <netipsec/ipcomp.h> 106 107 108 #include <machine/stdarg.h> 109 110 111 #include <net/net_osdep.h> 112 113 #define FULLMASK 0xff 114 #define _BITS(bytes) ((bytes) << 3) 115 116 /* 117 * Note on SA reference counting: 118 * - SAs that are not in DEAD state will have (total external reference + 1) 119 * following value in reference count field. they cannot be freed and are 120 * referenced from SA header. 121 * - SAs that are in DEAD state will have (total external reference) 122 * in reference count field. they are ready to be freed. reference from 123 * SA header will be removed in key_delsav(), when the reference count 124 * field hits 0 (= no external reference other than from SA header. 125 */ 126 127 u_int32_t key_debug_level = 0; 128 static u_int key_spi_trycnt = 1000; 129 static u_int32_t key_spi_minval = 0x100; 130 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 131 static u_int32_t policy_id = 0; 132 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 133 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 134 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 135 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 136 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 137 138 static u_int32_t acq_seq = 0; 139 static int key_tick_init_random = 0; 140 141 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 142 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 143 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 144 /* registed list */ 145 #ifndef IPSEC_NONBLOCK_ACQUIRE 146 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 147 #endif 148 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 149 150 /* search order for SAs */ 151 static u_int saorder_state_valid[] = { 152 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 153 /* 154 * This order is important because we must select the oldest SA 155 * for outbound processing. For inbound, This is not important. 156 */ 157 }; 158 static u_int saorder_state_alive[] = { 159 /* except DEAD */ 160 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 161 }; 162 static u_int saorder_state_any[] = { 163 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 164 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 165 }; 166 167 static const int minsize[] = { 168 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 169 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 170 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 171 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 172 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 173 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 174 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 175 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 176 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 177 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 178 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 179 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 180 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 181 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 182 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 183 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 184 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 185 0, /* SADB_X_EXT_KMPRIVATE */ 186 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 187 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 188 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 189 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 190 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 191 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OA */ 192 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 193 }; 194 static const int maxsize[] = { 195 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 196 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 197 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 198 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 199 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 200 0, /* SADB_EXT_ADDRESS_SRC */ 201 0, /* SADB_EXT_ADDRESS_DST */ 202 0, /* SADB_EXT_ADDRESS_PROXY */ 203 0, /* SADB_EXT_KEY_AUTH */ 204 0, /* SADB_EXT_KEY_ENCRYPT */ 205 0, /* SADB_EXT_IDENTITY_SRC */ 206 0, /* SADB_EXT_IDENTITY_DST */ 207 0, /* SADB_EXT_SENSITIVITY */ 208 0, /* SADB_EXT_PROPOSAL */ 209 0, /* SADB_EXT_SUPPORTED_AUTH */ 210 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 211 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 212 0, /* SADB_X_EXT_KMPRIVATE */ 213 0, /* SADB_X_EXT_POLICY */ 214 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 215 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 216 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 217 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 218 0, /* SADB_X_EXT_NAT_T_OA */ 219 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 220 }; 221 222 static int ipsec_esp_keymin = 256; 223 static int ipsec_esp_auth = 0; 224 static int ipsec_ah_keymin = 128; 225 226 #ifdef SYSCTL_DECL 227 SYSCTL_DECL(_net_key); 228 #endif 229 230 #ifdef SYSCTL_INT 231 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 232 &key_debug_level, 0, ""); 233 234 /* max count of trial for the decision of spi value */ 235 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 236 &key_spi_trycnt, 0, ""); 237 238 /* minimum spi value to allocate automatically. */ 239 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 240 &key_spi_minval, 0, ""); 241 242 /* maximun spi value to allocate automatically. */ 243 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 244 &key_spi_maxval, 0, ""); 245 246 /* interval to initialize randseed */ 247 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 248 &key_int_random, 0, ""); 249 250 /* lifetime for larval SA */ 251 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 252 &key_larval_lifetime, 0, ""); 253 254 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 255 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 256 &key_blockacq_count, 0, ""); 257 258 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 259 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 260 &key_blockacq_lifetime, 0, ""); 261 262 /* ESP auth */ 263 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 264 &ipsec_esp_auth, 0, ""); 265 266 /* minimum ESP key length */ 267 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 268 &ipsec_esp_keymin, 0, ""); 269 270 /* minimum AH key length */ 271 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 272 &ipsec_ah_keymin, 0, ""); 273 274 /* perfered old SA rather than new SA */ 275 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 276 &key_prefered_oldsa, 0, ""); 277 #endif /* SYSCTL_INT */ 278 279 #ifndef LIST_FOREACH 280 #define LIST_FOREACH(elm, head, field) \ 281 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field)) 282 #endif 283 #define __LIST_CHAINED(elm) \ 284 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 285 #define LIST_INSERT_TAIL(head, elm, type, field) \ 286 do {\ 287 struct type *curelm = LIST_FIRST(head); \ 288 if (curelm == NULL) {\ 289 LIST_INSERT_HEAD(head, elm, field); \ 290 } else { \ 291 while (LIST_NEXT(curelm, field)) \ 292 curelm = LIST_NEXT(curelm, field);\ 293 LIST_INSERT_AFTER(curelm, elm, field);\ 294 }\ 295 } while (0) 296 297 #define KEY_CHKSASTATE(head, sav, name) \ 298 do { \ 299 if ((head) != (sav)) { \ 300 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 301 (name), (head), (sav))); \ 302 continue; \ 303 } \ 304 } while (0) 305 306 #define KEY_CHKSPDIR(head, sp, name) \ 307 do { \ 308 if ((head) != (sp)) { \ 309 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 310 "anyway continue.\n", \ 311 (name), (head), (sp))); \ 312 } \ 313 } while (0) 314 315 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management"); 316 317 #if 1 318 #define KMALLOC(p, t, n) \ 319 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT)) 320 #define KFREE(p) \ 321 free((p), M_SECA) 322 #else 323 #define KMALLOC(p, t, n) \ 324 do { \ 325 ((p) = (t)malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \ 326 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \ 327 __FILE__, __LINE__, (p), #t, n); \ 328 } while (0) 329 330 #define KFREE(p) \ 331 do { \ 332 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \ 333 free((p), M_SECA); \ 334 } while (0) 335 #endif 336 337 /* 338 * set parameters into secpolicyindex buffer. 339 * Must allocate secpolicyindex buffer passed to this function. 340 */ 341 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 342 do { \ 343 bzero((idx), sizeof(struct secpolicyindex)); \ 344 (idx)->dir = (_dir); \ 345 (idx)->prefs = (ps); \ 346 (idx)->prefd = (pd); \ 347 (idx)->ul_proto = (ulp); \ 348 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 349 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 350 } while (0) 351 352 /* 353 * set parameters into secasindex buffer. 354 * Must allocate secasindex buffer before calling this function. 355 */ 356 static int 357 key_setsecasidx __P((int, int, int, const struct sadb_address *, 358 const struct sadb_address *, struct secasindex *)); 359 360 /* key statistics */ 361 struct _keystat { 362 u_long getspi_count; /* the avarage of count to try to get new SPI */ 363 } keystat; 364 365 struct sadb_msghdr { 366 struct sadb_msg *msg; 367 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 368 int extoff[SADB_EXT_MAX + 1]; 369 int extlen[SADB_EXT_MAX + 1]; 370 }; 371 372 static struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 373 static void key_freesp_so __P((struct secpolicy **)); 374 static struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 375 static void key_delsp __P((struct secpolicy *)); 376 static struct secpolicy *key_getsp __P((struct secpolicyindex *)); 377 static struct secpolicy *key_getspbyid __P((u_int32_t)); 378 static u_int16_t key_newreqid __P((void)); 379 static struct mbuf *key_gather_mbuf __P((struct mbuf *, 380 const struct sadb_msghdr *, int, int, ...)); 381 static int key_spdadd __P((struct socket *, struct mbuf *, 382 const struct sadb_msghdr *)); 383 static u_int32_t key_getnewspid __P((void)); 384 static int key_spddelete __P((struct socket *, struct mbuf *, 385 const struct sadb_msghdr *)); 386 static int key_spddelete2 __P((struct socket *, struct mbuf *, 387 const struct sadb_msghdr *)); 388 static int key_spdget __P((struct socket *, struct mbuf *, 389 const struct sadb_msghdr *)); 390 static int key_spdflush __P((struct socket *, struct mbuf *, 391 const struct sadb_msghdr *)); 392 static int key_spddump __P((struct socket *, struct mbuf *, 393 const struct sadb_msghdr *)); 394 static struct mbuf * key_setspddump __P((int *errorp, pid_t)); 395 static struct mbuf * key_setspddump_chain __P((int *errorp, int *lenp, pid_t pid)); 396 #ifdef IPSEC_NAT_T 397 static int key_nat_map __P((struct socket *, struct mbuf *, 398 const struct sadb_msghdr *)); 399 #endif 400 static struct mbuf *key_setdumpsp __P((struct secpolicy *, 401 u_int8_t, u_int32_t, pid_t)); 402 static u_int key_getspreqmsglen __P((struct secpolicy *)); 403 static int key_spdexpire __P((struct secpolicy *)); 404 static struct secashead *key_newsah __P((struct secasindex *)); 405 static void key_delsah __P((struct secashead *)); 406 static struct secasvar *key_newsav __P((struct mbuf *, 407 const struct sadb_msghdr *, struct secashead *, int *, 408 const char*, int)); 409 #define KEY_NEWSAV(m, sadb, sah, e) \ 410 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 411 static void key_delsav __P((struct secasvar *)); 412 static struct secashead *key_getsah __P((struct secasindex *)); 413 static struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 414 static struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 415 static int key_setsaval __P((struct secasvar *, struct mbuf *, 416 const struct sadb_msghdr *)); 417 static int key_mature __P((struct secasvar *)); 418 static struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 419 u_int8_t, u_int32_t, u_int32_t)); 420 #ifdef IPSEC_NAT_T 421 static struct mbuf *key_setsadbxport __P((u_int16_t, u_int16_t)); 422 static struct mbuf *key_setsadbxtype __P((u_int16_t)); 423 #endif 424 static void key_porttosaddr __P((union sockaddr_union *, u_int16_t)); 425 static int key_checksalen __P((const union sockaddr_union *)); 426 static struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 427 u_int32_t, pid_t, u_int16_t)); 428 static struct mbuf *key_setsadbsa __P((struct secasvar *)); 429 static struct mbuf *key_setsadbaddr __P((u_int16_t, 430 const struct sockaddr *, u_int8_t, u_int16_t)); 431 #if 0 432 static struct mbuf *key_setsadbident __P((u_int16_t, u_int16_t, void *, 433 int, u_int64_t)); 434 #endif 435 static struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int16_t)); 436 static struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 437 u_int32_t)); 438 static void *key_newbuf __P((const void *, u_int)); 439 #ifdef INET6 440 static int key_ismyaddr6 __P((struct sockaddr_in6 *)); 441 #endif 442 443 /* flags for key_cmpsaidx() */ 444 #define CMP_HEAD 1 /* protocol, addresses. */ 445 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 446 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 447 #define CMP_EXACTLY 4 /* all elements. */ 448 static int key_cmpsaidx 449 __P((const struct secasindex *, const struct secasindex *, int)); 450 451 static int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 452 static int key_bbcmp __P((const void *, const void *, u_int)); 453 static void key_srandom __P((void)); 454 static u_int16_t key_satype2proto __P((u_int8_t)); 455 static u_int8_t key_proto2satype __P((u_int16_t)); 456 457 static int key_getspi __P((struct socket *, struct mbuf *, 458 const struct sadb_msghdr *)); 459 static u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 460 struct secasindex *)); 461 #ifdef IPSEC_NAT_T 462 static int key_handle_natt_info __P((struct secasvar *, 463 const struct sadb_msghdr *)); 464 #endif 465 static int key_update __P((struct socket *, struct mbuf *, 466 const struct sadb_msghdr *)); 467 #ifdef IPSEC_DOSEQCHECK 468 static struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 469 #endif 470 static int key_add __P((struct socket *, struct mbuf *, 471 const struct sadb_msghdr *)); 472 static int key_setident __P((struct secashead *, struct mbuf *, 473 const struct sadb_msghdr *)); 474 static struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 475 const struct sadb_msghdr *)); 476 static int key_delete __P((struct socket *, struct mbuf *, 477 const struct sadb_msghdr *)); 478 static int key_get __P((struct socket *, struct mbuf *, 479 const struct sadb_msghdr *)); 480 481 static void key_getcomb_setlifetime __P((struct sadb_comb *)); 482 static struct mbuf *key_getcomb_esp __P((void)); 483 static struct mbuf *key_getcomb_ah __P((void)); 484 static struct mbuf *key_getcomb_ipcomp __P((void)); 485 static struct mbuf *key_getprop __P((const struct secasindex *)); 486 487 static int key_acquire __P((const struct secasindex *, struct secpolicy *)); 488 #ifndef IPSEC_NONBLOCK_ACQUIRE 489 static struct secacq *key_newacq __P((const struct secasindex *)); 490 static struct secacq *key_getacq __P((const struct secasindex *)); 491 static struct secacq *key_getacqbyseq __P((u_int32_t)); 492 #endif 493 static struct secspacq *key_newspacq __P((struct secpolicyindex *)); 494 static struct secspacq *key_getspacq __P((struct secpolicyindex *)); 495 static int key_acquire2 __P((struct socket *, struct mbuf *, 496 const struct sadb_msghdr *)); 497 static int key_register __P((struct socket *, struct mbuf *, 498 const struct sadb_msghdr *)); 499 static int key_expire __P((struct secasvar *)); 500 static int key_flush __P((struct socket *, struct mbuf *, 501 const struct sadb_msghdr *)); 502 static struct mbuf *key_setdump_chain __P((u_int8_t req_satype, int *errorp, 503 int *lenp, pid_t pid)); 504 static int key_dump __P((struct socket *, struct mbuf *, 505 const struct sadb_msghdr *)); 506 static int key_promisc __P((struct socket *, struct mbuf *, 507 const struct sadb_msghdr *)); 508 static int key_senderror __P((struct socket *, struct mbuf *, int)); 509 static int key_validate_ext __P((const struct sadb_ext *, int)); 510 static int key_align __P((struct mbuf *, struct sadb_msghdr *)); 511 #if 0 512 static const char *key_getfqdn __P((void)); 513 static const char *key_getuserfqdn __P((void)); 514 #endif 515 static void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 516 static inline void key_sp_dead __P((struct secpolicy *)); 517 static void key_sp_unlink __P((struct secpolicy *sp)); 518 519 static struct mbuf *key_alloc_mbuf __P((int)); 520 struct callout key_timehandler_ch; 521 522 #define SA_ADDREF(p) do { \ 523 (p)->refcnt++; \ 524 IPSEC_ASSERT((p)->refcnt != 0, \ 525 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 526 } while (0) 527 #define SA_DELREF(p) do { \ 528 IPSEC_ASSERT((p)->refcnt > 0, \ 529 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 530 (p)->refcnt--; \ 531 } while (0) 532 533 #define SP_ADDREF(p) do { \ 534 (p)->refcnt++; \ 535 IPSEC_ASSERT((p)->refcnt != 0, \ 536 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \ 537 } while (0) 538 #define SP_DELREF(p) do { \ 539 IPSEC_ASSERT((p)->refcnt > 0, \ 540 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \ 541 (p)->refcnt--; \ 542 } while (0) 543 544 545 static inline void 546 key_sp_dead(struct secpolicy *sp) 547 { 548 549 /* mark the SP dead */ 550 sp->state = IPSEC_SPSTATE_DEAD; 551 } 552 553 static void 554 key_sp_unlink(struct secpolicy *sp) 555 { 556 557 /* remove from SP index */ 558 if (__LIST_CHAINED(sp)) { 559 LIST_REMOVE(sp, chain); 560 /* Release refcount held just for being on chain */ 561 KEY_FREESP(&sp); 562 } 563 } 564 565 566 /* 567 * Return 0 when there are known to be no SP's for the specified 568 * direction. Otherwise return 1. This is used by IPsec code 569 * to optimize performance. 570 */ 571 int 572 key_havesp(u_int dir) 573 { 574 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 575 LIST_FIRST(&sptree[dir]) != NULL : 1); 576 } 577 578 /* %%% IPsec policy management */ 579 /* 580 * allocating a SP for OUTBOUND or INBOUND packet. 581 * Must call key_freesp() later. 582 * OUT: NULL: not found 583 * others: found and return the pointer. 584 */ 585 struct secpolicy * 586 key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 587 { 588 struct secpolicy *sp; 589 int s; 590 591 IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx")); 592 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 593 ("key_allocsp: invalid direction %u", dir)); 594 595 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 596 printf("DP key_allocsp from %s:%u\n", where, tag)); 597 598 /* get a SP entry */ 599 s = splsoftnet(); /*called from softclock()*/ 600 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 601 printf("*** objects\n"); 602 kdebug_secpolicyindex(spidx)); 603 604 LIST_FOREACH(sp, &sptree[dir], chain) { 605 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 606 printf("*** in SPD\n"); 607 kdebug_secpolicyindex(&sp->spidx)); 608 609 if (sp->state == IPSEC_SPSTATE_DEAD) 610 continue; 611 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 612 goto found; 613 } 614 sp = NULL; 615 found: 616 if (sp) { 617 /* sanity check */ 618 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp"); 619 620 /* found a SPD entry */ 621 sp->lastused = time_second; 622 SP_ADDREF(sp); 623 } 624 splx(s); 625 626 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 627 printf("DP key_allocsp return SP:%p (ID=%u) refcnt %u\n", 628 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 629 return sp; 630 } 631 632 /* 633 * allocating a SP for OUTBOUND or INBOUND packet. 634 * Must call key_freesp() later. 635 * OUT: NULL: not found 636 * others: found and return the pointer. 637 */ 638 struct secpolicy * 639 key_allocsp2(u_int32_t spi, 640 union sockaddr_union *dst, 641 u_int8_t proto, 642 u_int dir, 643 const char* where, int tag) 644 { 645 struct secpolicy *sp; 646 int s; 647 648 IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst")); 649 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 650 ("key_allocsp2: invalid direction %u", dir)); 651 652 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 653 printf("DP key_allocsp2 from %s:%u\n", where, tag)); 654 655 /* get a SP entry */ 656 s = splsoftnet(); /*called from softclock()*/ 657 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 658 printf("*** objects\n"); 659 printf("spi %u proto %u dir %u\n", spi, proto, dir); 660 kdebug_sockaddr(&dst->sa)); 661 662 LIST_FOREACH(sp, &sptree[dir], chain) { 663 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 664 printf("*** in SPD\n"); 665 kdebug_secpolicyindex(&sp->spidx)); 666 667 if (sp->state == IPSEC_SPSTATE_DEAD) 668 continue; 669 /* compare simple values, then dst address */ 670 if (sp->spidx.ul_proto != proto) 671 continue; 672 /* NB: spi's must exist and match */ 673 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 674 continue; 675 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 676 goto found; 677 } 678 sp = NULL; 679 found: 680 if (sp) { 681 /* sanity check */ 682 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2"); 683 684 /* found a SPD entry */ 685 sp->lastused = time_second; 686 SP_ADDREF(sp); 687 } 688 splx(s); 689 690 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 691 printf("DP key_allocsp2 return SP:%p (ID=%u) refcnt %u\n", 692 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 693 return sp; 694 } 695 696 /* 697 * return a policy that matches this particular inbound packet. 698 * XXX slow 699 */ 700 struct secpolicy * 701 key_gettunnel(const struct sockaddr *osrc, 702 const struct sockaddr *odst, 703 const struct sockaddr *isrc, 704 const struct sockaddr *idst, 705 const char* where, int tag) 706 { 707 struct secpolicy *sp; 708 const int dir = IPSEC_DIR_INBOUND; 709 int s; 710 struct ipsecrequest *r1, *r2, *p; 711 struct secpolicyindex spidx; 712 713 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 714 printf("DP key_gettunnel from %s:%u\n", where, tag)); 715 716 if (isrc->sa_family != idst->sa_family) { 717 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.", 718 isrc->sa_family, idst->sa_family)); 719 sp = NULL; 720 goto done; 721 } 722 723 s = splsoftnet(); /*called from softclock()*/ 724 LIST_FOREACH(sp, &sptree[dir], chain) { 725 if (sp->state == IPSEC_SPSTATE_DEAD) 726 continue; 727 728 r1 = r2 = NULL; 729 for (p = sp->req; p; p = p->next) { 730 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 731 continue; 732 733 r1 = r2; 734 r2 = p; 735 736 if (!r1) { 737 /* here we look at address matches only */ 738 spidx = sp->spidx; 739 if (isrc->sa_len > sizeof(spidx.src) || 740 idst->sa_len > sizeof(spidx.dst)) 741 continue; 742 bcopy(isrc, &spidx.src, isrc->sa_len); 743 bcopy(idst, &spidx.dst, idst->sa_len); 744 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 745 continue; 746 } else { 747 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 748 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 749 continue; 750 } 751 752 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 753 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 754 continue; 755 756 goto found; 757 } 758 } 759 sp = NULL; 760 found: 761 if (sp) { 762 sp->lastused = time_second; 763 SP_ADDREF(sp); 764 } 765 splx(s); 766 done: 767 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 768 printf("DP key_gettunnel return SP:%p (ID=%u) refcnt %u\n", 769 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 770 return sp; 771 } 772 773 /* 774 * allocating an SA entry for an *OUTBOUND* packet. 775 * checking each request entries in SP, and acquire an SA if need. 776 * OUT: 0: there are valid requests. 777 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 778 */ 779 int 780 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 781 { 782 u_int level; 783 int error; 784 785 IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr")); 786 IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx")); 787 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 788 saidx->mode == IPSEC_MODE_TUNNEL, 789 ("key_checkrequest: unexpected policy %u", saidx->mode)); 790 791 /* get current level */ 792 level = ipsec_get_reqlevel(isr); 793 794 /* 795 * XXX guard against protocol callbacks from the crypto 796 * thread as they reference ipsecrequest.sav which we 797 * temporarily null out below. Need to rethink how we 798 * handle bundled SA's in the callback thread. 799 */ 800 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 801 #if 0 802 /* 803 * We do allocate new SA only if the state of SA in the holder is 804 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 805 */ 806 if (isr->sav != NULL) { 807 if (isr->sav->sah == NULL) 808 panic("key_checkrequest: sah is null"); 809 if (isr->sav == (struct secasvar *)LIST_FIRST( 810 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 811 KEY_FREESAV(&isr->sav); 812 isr->sav = NULL; 813 } 814 } 815 #else 816 /* 817 * we free any SA stashed in the IPsec request because a different 818 * SA may be involved each time this request is checked, either 819 * because new SAs are being configured, or this request is 820 * associated with an unconnected datagram socket, or this request 821 * is associated with a system default policy. 822 * 823 * The operation may have negative impact to performance. We may 824 * want to check cached SA carefully, rather than picking new SA 825 * every time. 826 */ 827 if (isr->sav != NULL) { 828 KEY_FREESAV(&isr->sav); 829 isr->sav = NULL; 830 } 831 #endif 832 833 /* 834 * new SA allocation if no SA found. 835 * key_allocsa_policy should allocate the oldest SA available. 836 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 837 */ 838 if (isr->sav == NULL) 839 isr->sav = key_allocsa_policy(saidx); 840 841 /* When there is SA. */ 842 if (isr->sav != NULL) { 843 if (isr->sav->state != SADB_SASTATE_MATURE && 844 isr->sav->state != SADB_SASTATE_DYING) 845 return EINVAL; 846 return 0; 847 } 848 849 /* there is no SA */ 850 error = key_acquire(saidx, isr->sp); 851 if (error != 0) { 852 /* XXX What should I do ? */ 853 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned " 854 "from key_acquire.\n", error)); 855 return error; 856 } 857 858 if (level != IPSEC_LEVEL_REQUIRE) { 859 /* XXX sigh, the interface to this routine is botched */ 860 IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA")); 861 return 0; 862 } else { 863 return ENOENT; 864 } 865 } 866 867 /* 868 * allocating a SA for policy entry from SAD. 869 * NOTE: searching SAD of aliving state. 870 * OUT: NULL: not found. 871 * others: found and return the pointer. 872 */ 873 static struct secasvar * 874 key_allocsa_policy(const struct secasindex *saidx) 875 { 876 struct secashead *sah; 877 struct secasvar *sav; 878 u_int stateidx, state; 879 880 LIST_FOREACH(sah, &sahtree, chain) { 881 if (sah->state == SADB_SASTATE_DEAD) 882 continue; 883 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) 884 goto found; 885 } 886 887 return NULL; 888 889 found: 890 891 /* search valid state */ 892 for (stateidx = 0; 893 stateidx < _ARRAYLEN(saorder_state_valid); 894 stateidx++) { 895 896 state = saorder_state_valid[stateidx]; 897 898 sav = key_do_allocsa_policy(sah, state); 899 if (sav != NULL) 900 return sav; 901 } 902 903 return NULL; 904 } 905 906 /* 907 * searching SAD with direction, protocol, mode and state. 908 * called by key_allocsa_policy(). 909 * OUT: 910 * NULL : not found 911 * others : found, pointer to a SA. 912 */ 913 static struct secasvar * 914 key_do_allocsa_policy(struct secashead *sah, u_int state) 915 { 916 struct secasvar *sav, *nextsav, *candidate, *d; 917 918 /* initilize */ 919 candidate = NULL; 920 921 for (sav = LIST_FIRST(&sah->savtree[state]); 922 sav != NULL; 923 sav = nextsav) { 924 925 nextsav = LIST_NEXT(sav, chain); 926 927 /* sanity check */ 928 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy"); 929 930 /* initialize */ 931 if (candidate == NULL) { 932 candidate = sav; 933 continue; 934 } 935 936 /* Which SA is the better ? */ 937 938 /* sanity check 2 */ 939 if (candidate->lft_c == NULL || sav->lft_c == NULL) 940 panic("key_do_allocsa_policy: " 941 "lifetime_current is NULL"); 942 943 /* What the best method is to compare ? */ 944 if (key_prefered_oldsa) { 945 if (candidate->lft_c->sadb_lifetime_addtime > 946 sav->lft_c->sadb_lifetime_addtime) { 947 candidate = sav; 948 } 949 continue; 950 /*NOTREACHED*/ 951 } 952 953 /* prefered new sa rather than old sa */ 954 if (candidate->lft_c->sadb_lifetime_addtime < 955 sav->lft_c->sadb_lifetime_addtime) { 956 d = candidate; 957 candidate = sav; 958 } else 959 d = sav; 960 961 /* 962 * prepared to delete the SA when there is more 963 * suitable candidate and the lifetime of the SA is not 964 * permanent. 965 */ 966 if (d->lft_c->sadb_lifetime_addtime != 0) { 967 struct mbuf *m, *result; 968 969 key_sa_chgstate(d, SADB_SASTATE_DEAD); 970 971 IPSEC_ASSERT(d->refcnt > 0, 972 ("key_do_allocsa_policy: bogus ref count")); 973 m = key_setsadbmsg(SADB_DELETE, 0, 974 d->sah->saidx.proto, 0, 0, d->refcnt - 1); 975 if (!m) 976 goto msgfail; 977 result = m; 978 979 /* set sadb_address for saidx's. */ 980 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 981 &d->sah->saidx.src.sa, 982 d->sah->saidx.src.sa.sa_len << 3, 983 IPSEC_ULPROTO_ANY); 984 if (!m) 985 goto msgfail; 986 m_cat(result, m); 987 988 /* set sadb_address for saidx's. */ 989 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 990 &d->sah->saidx.src.sa, 991 d->sah->saidx.src.sa.sa_len << 3, 992 IPSEC_ULPROTO_ANY); 993 if (!m) 994 goto msgfail; 995 m_cat(result, m); 996 997 /* create SA extension */ 998 m = key_setsadbsa(d); 999 if (!m) 1000 goto msgfail; 1001 m_cat(result, m); 1002 1003 if (result->m_len < sizeof(struct sadb_msg)) { 1004 result = m_pullup(result, 1005 sizeof(struct sadb_msg)); 1006 if (result == NULL) 1007 goto msgfail; 1008 } 1009 1010 result->m_pkthdr.len = 0; 1011 for (m = result; m; m = m->m_next) 1012 result->m_pkthdr.len += m->m_len; 1013 mtod(result, struct sadb_msg *)->sadb_msg_len = 1014 PFKEY_UNIT64(result->m_pkthdr.len); 1015 1016 if (key_sendup_mbuf(NULL, result, 1017 KEY_SENDUP_REGISTERED)) 1018 goto msgfail; 1019 msgfail: 1020 KEY_FREESAV(&d); 1021 } 1022 } 1023 1024 if (candidate) { 1025 SA_ADDREF(candidate); 1026 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1027 printf("DP allocsa_policy cause " 1028 "refcnt++:%d SA:%p\n", 1029 candidate->refcnt, candidate)); 1030 } 1031 return candidate; 1032 } 1033 1034 /* 1035 * allocating a usable SA entry for a *INBOUND* packet. 1036 * Must call key_freesav() later. 1037 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1038 * NULL: not found, or error occurred. 1039 * 1040 * In the comparison, no source address is used--for RFC2401 conformance. 1041 * To quote, from section 4.1: 1042 * A security association is uniquely identified by a triple consisting 1043 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1044 * security protocol (AH or ESP) identifier. 1045 * Note that, however, we do need to keep source address in IPsec SA. 1046 * IKE specification and PF_KEY specification do assume that we 1047 * keep source address in IPsec SA. We see a tricky situation here. 1048 * 1049 * sport and dport are used for NAT-T. network order is always used. 1050 */ 1051 struct secasvar * 1052 key_allocsa( 1053 const union sockaddr_union *dst, 1054 u_int proto, 1055 u_int32_t spi, 1056 u_int16_t sport, 1057 u_int16_t dport, 1058 const char* where, int tag) 1059 { 1060 struct secashead *sah; 1061 struct secasvar *sav; 1062 u_int stateidx, state; 1063 int s; 1064 int chkport = 0; 1065 1066 int must_check_spi = 1; 1067 int must_check_alg = 0; 1068 u_int16_t cpi = 0; 1069 u_int8_t algo = 0; 1070 1071 #ifdef IPSEC_NAT_T 1072 if ((sport != 0) && (dport != 0)) 1073 chkport = 1; 1074 #endif 1075 1076 IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address")); 1077 1078 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1079 printf("DP key_allocsa from %s:%u\n", where, tag)); 1080 1081 /* 1082 * XXX IPCOMP case 1083 * We use cpi to define spi here. In the case where cpi <= 1084 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1085 * the real spi. In this case, don't check the spi but check the 1086 * algorithm 1087 */ 1088 1089 if (proto == IPPROTO_IPCOMP) { 1090 u_int32_t tmp; 1091 tmp = ntohl(spi); 1092 cpi = (u_int16_t) tmp; 1093 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1094 algo = (u_int8_t) cpi; 1095 must_check_spi = 0; 1096 must_check_alg = 1; 1097 } 1098 } 1099 1100 /* 1101 * searching SAD. 1102 * XXX: to be checked internal IP header somewhere. Also when 1103 * IPsec tunnel packet is received. But ESP tunnel mode is 1104 * encrypted so we can't check internal IP header. 1105 */ 1106 s = splsoftnet(); /*called from softclock()*/ 1107 LIST_FOREACH(sah, &sahtree, chain) { 1108 /* search valid state */ 1109 for (stateidx = 0; 1110 stateidx < _ARRAYLEN(saorder_state_valid); 1111 stateidx++) { 1112 state = saorder_state_valid[stateidx]; 1113 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1114 /* sanity check */ 1115 KEY_CHKSASTATE(sav->state, state, "key_allocsav"); 1116 /* do not return entries w/ unusable state */ 1117 if (sav->state != SADB_SASTATE_MATURE && 1118 sav->state != SADB_SASTATE_DYING) 1119 continue; 1120 if (proto != sav->sah->saidx.proto) 1121 continue; 1122 if (must_check_spi && spi != sav->spi) 1123 continue; 1124 /* XXX only on the ipcomp case */ 1125 if (must_check_alg && algo != sav->alg_comp) 1126 continue; 1127 1128 #if 0 /* don't check src */ 1129 /* Fix port in src->sa */ 1130 1131 /* check src address */ 1132 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1133 continue; 1134 #endif 1135 /* fix port of dst address XXX*/ 1136 key_porttosaddr(__UNCONST(dst), dport); 1137 /* check dst address */ 1138 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1139 continue; 1140 SA_ADDREF(sav); 1141 goto done; 1142 } 1143 } 1144 } 1145 sav = NULL; 1146 done: 1147 splx(s); 1148 1149 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1150 printf("DP key_allocsa return SA:%p; refcnt %u\n", 1151 sav, sav ? sav->refcnt : 0)); 1152 return sav; 1153 } 1154 1155 /* 1156 * Must be called after calling key_allocsp(). 1157 * For both the packet without socket and key_freeso(). 1158 */ 1159 void 1160 _key_freesp(struct secpolicy **spp, const char* where, int tag) 1161 { 1162 struct secpolicy *sp = *spp; 1163 1164 IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp")); 1165 1166 SP_DELREF(sp); 1167 1168 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1169 printf("DP key_freesp SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1170 sp, sp->id, where, tag, sp->refcnt)); 1171 1172 if (sp->refcnt == 0) { 1173 *spp = NULL; 1174 key_delsp(sp); 1175 } 1176 } 1177 1178 /* 1179 * Must be called after calling key_allocsp(). 1180 * For the packet with socket. 1181 */ 1182 void 1183 key_freeso(struct socket *so) 1184 { 1185 /* sanity check */ 1186 IPSEC_ASSERT(so != NULL, ("key_freeso: null so")); 1187 1188 switch (so->so_proto->pr_domain->dom_family) { 1189 #ifdef INET 1190 case PF_INET: 1191 { 1192 struct inpcb *pcb = sotoinpcb(so); 1193 1194 /* Does it have a PCB ? */ 1195 if (pcb == NULL) 1196 return; 1197 key_freesp_so(&pcb->inp_sp->sp_in); 1198 key_freesp_so(&pcb->inp_sp->sp_out); 1199 } 1200 break; 1201 #endif 1202 #ifdef INET6 1203 case PF_INET6: 1204 { 1205 #ifdef HAVE_NRL_INPCB 1206 struct inpcb *pcb = sotoinpcb(so); 1207 1208 /* Does it have a PCB ? */ 1209 if (pcb == NULL) 1210 return; 1211 key_freesp_so(&pcb->inp_sp->sp_in); 1212 key_freesp_so(&pcb->inp_sp->sp_out); 1213 #else 1214 struct in6pcb *pcb = sotoin6pcb(so); 1215 1216 /* Does it have a PCB ? */ 1217 if (pcb == NULL) 1218 return; 1219 key_freesp_so(&pcb->in6p_sp->sp_in); 1220 key_freesp_so(&pcb->in6p_sp->sp_out); 1221 #endif 1222 } 1223 break; 1224 #endif /* INET6 */ 1225 default: 1226 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n", 1227 so->so_proto->pr_domain->dom_family)); 1228 return; 1229 } 1230 } 1231 1232 static void 1233 key_freesp_so(struct secpolicy **sp) 1234 { 1235 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp")); 1236 1237 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1238 (*sp)->policy == IPSEC_POLICY_BYPASS) 1239 return; 1240 1241 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1242 ("key_freesp_so: invalid policy %u", (*sp)->policy)); 1243 KEY_FREESP(sp); 1244 } 1245 1246 /* 1247 * Must be called after calling key_allocsa(). 1248 * This function is called by key_freesp() to free some SA allocated 1249 * for a policy. 1250 */ 1251 void 1252 key_freesav(struct secasvar **psav, const char* where, int tag) 1253 { 1254 struct secasvar *sav = *psav; 1255 1256 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav")); 1257 1258 SA_DELREF(sav); 1259 1260 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1261 printf("DP key_freesav SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1262 sav, (u_long)ntohl(sav->spi), 1263 where, tag, sav->refcnt)); 1264 1265 if (sav->refcnt == 0) { 1266 *psav = NULL; 1267 key_delsav(sav); 1268 } 1269 } 1270 1271 /* %%% SPD management */ 1272 /* 1273 * free security policy entry. 1274 */ 1275 static void 1276 key_delsp(struct secpolicy *sp) 1277 { 1278 int s; 1279 1280 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp")); 1281 1282 key_sp_dead(sp); 1283 1284 IPSEC_ASSERT(sp->refcnt == 0, 1285 ("key_delsp: SP with references deleted (refcnt %u)", 1286 sp->refcnt)); 1287 1288 s = splsoftnet(); /*called from softclock()*/ 1289 1290 { 1291 struct ipsecrequest *isr = sp->req, *nextisr; 1292 1293 while (isr != NULL) { 1294 if (isr->sav != NULL) { 1295 KEY_FREESAV(&isr->sav); 1296 isr->sav = NULL; 1297 } 1298 1299 nextisr = isr->next; 1300 KFREE(isr); 1301 isr = nextisr; 1302 } 1303 } 1304 1305 KFREE(sp); 1306 1307 splx(s); 1308 } 1309 1310 /* 1311 * search SPD 1312 * OUT: NULL : not found 1313 * others : found, pointer to a SP. 1314 */ 1315 static struct secpolicy * 1316 key_getsp(struct secpolicyindex *spidx) 1317 { 1318 struct secpolicy *sp; 1319 1320 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx")); 1321 1322 LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1323 if (sp->state == IPSEC_SPSTATE_DEAD) 1324 continue; 1325 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1326 SP_ADDREF(sp); 1327 return sp; 1328 } 1329 } 1330 1331 return NULL; 1332 } 1333 1334 /* 1335 * get SP by index. 1336 * OUT: NULL : not found 1337 * others : found, pointer to a SP. 1338 */ 1339 static struct secpolicy * 1340 key_getspbyid(u_int32_t id) 1341 { 1342 struct secpolicy *sp; 1343 1344 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1345 if (sp->state == IPSEC_SPSTATE_DEAD) 1346 continue; 1347 if (sp->id == id) { 1348 SP_ADDREF(sp); 1349 return sp; 1350 } 1351 } 1352 1353 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1354 if (sp->state == IPSEC_SPSTATE_DEAD) 1355 continue; 1356 if (sp->id == id) { 1357 SP_ADDREF(sp); 1358 return sp; 1359 } 1360 } 1361 1362 return NULL; 1363 } 1364 1365 struct secpolicy * 1366 key_newsp(const char* where, int tag) 1367 { 1368 struct secpolicy *newsp = NULL; 1369 1370 newsp = (struct secpolicy *) 1371 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO); 1372 if (newsp) { 1373 newsp->refcnt = 1; 1374 newsp->req = NULL; 1375 } 1376 1377 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1378 printf("DP key_newsp from %s:%u return SP:%p\n", 1379 where, tag, newsp)); 1380 return newsp; 1381 } 1382 1383 /* 1384 * create secpolicy structure from sadb_x_policy structure. 1385 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1386 * so must be set properly later. 1387 */ 1388 struct secpolicy * 1389 key_msg2sp(xpl0, len, error) 1390 struct sadb_x_policy *xpl0; 1391 size_t len; 1392 int *error; 1393 { 1394 struct secpolicy *newsp; 1395 1396 /* sanity check */ 1397 if (xpl0 == NULL) 1398 panic("key_msg2sp: NULL pointer was passed"); 1399 if (len < sizeof(*xpl0)) 1400 panic("key_msg2sp: invalid length"); 1401 if (len != PFKEY_EXTLEN(xpl0)) { 1402 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n")); 1403 *error = EINVAL; 1404 return NULL; 1405 } 1406 1407 if ((newsp = KEY_NEWSP()) == NULL) { 1408 *error = ENOBUFS; 1409 return NULL; 1410 } 1411 1412 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1413 newsp->policy = xpl0->sadb_x_policy_type; 1414 1415 /* check policy */ 1416 switch (xpl0->sadb_x_policy_type) { 1417 case IPSEC_POLICY_DISCARD: 1418 case IPSEC_POLICY_NONE: 1419 case IPSEC_POLICY_ENTRUST: 1420 case IPSEC_POLICY_BYPASS: 1421 newsp->req = NULL; 1422 break; 1423 1424 case IPSEC_POLICY_IPSEC: 1425 { 1426 int tlen; 1427 struct sadb_x_ipsecrequest *xisr; 1428 struct ipsecrequest **p_isr = &newsp->req; 1429 1430 /* validity check */ 1431 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1432 ipseclog((LOG_DEBUG, 1433 "key_msg2sp: Invalid msg length.\n")); 1434 KEY_FREESP(&newsp); 1435 *error = EINVAL; 1436 return NULL; 1437 } 1438 1439 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1440 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1441 1442 while (tlen > 0) { 1443 /* length check */ 1444 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1445 ipseclog((LOG_DEBUG, "key_msg2sp: " 1446 "invalid ipsecrequest length.\n")); 1447 KEY_FREESP(&newsp); 1448 *error = EINVAL; 1449 return NULL; 1450 } 1451 1452 /* allocate request buffer */ 1453 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr)); 1454 if ((*p_isr) == NULL) { 1455 ipseclog((LOG_DEBUG, 1456 "key_msg2sp: No more memory.\n")); 1457 KEY_FREESP(&newsp); 1458 *error = ENOBUFS; 1459 return NULL; 1460 } 1461 bzero(*p_isr, sizeof(**p_isr)); 1462 1463 /* set values */ 1464 (*p_isr)->next = NULL; 1465 1466 switch (xisr->sadb_x_ipsecrequest_proto) { 1467 case IPPROTO_ESP: 1468 case IPPROTO_AH: 1469 case IPPROTO_IPCOMP: 1470 break; 1471 default: 1472 ipseclog((LOG_DEBUG, 1473 "key_msg2sp: invalid proto type=%u\n", 1474 xisr->sadb_x_ipsecrequest_proto)); 1475 KEY_FREESP(&newsp); 1476 *error = EPROTONOSUPPORT; 1477 return NULL; 1478 } 1479 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1480 1481 switch (xisr->sadb_x_ipsecrequest_mode) { 1482 case IPSEC_MODE_TRANSPORT: 1483 case IPSEC_MODE_TUNNEL: 1484 break; 1485 case IPSEC_MODE_ANY: 1486 default: 1487 ipseclog((LOG_DEBUG, 1488 "key_msg2sp: invalid mode=%u\n", 1489 xisr->sadb_x_ipsecrequest_mode)); 1490 KEY_FREESP(&newsp); 1491 *error = EINVAL; 1492 return NULL; 1493 } 1494 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1495 1496 switch (xisr->sadb_x_ipsecrequest_level) { 1497 case IPSEC_LEVEL_DEFAULT: 1498 case IPSEC_LEVEL_USE: 1499 case IPSEC_LEVEL_REQUIRE: 1500 break; 1501 case IPSEC_LEVEL_UNIQUE: 1502 /* validity check */ 1503 /* 1504 * If range violation of reqid, kernel will 1505 * update it, don't refuse it. 1506 */ 1507 if (xisr->sadb_x_ipsecrequest_reqid 1508 > IPSEC_MANUAL_REQID_MAX) { 1509 ipseclog((LOG_DEBUG, 1510 "key_msg2sp: reqid=%d range " 1511 "violation, updated by kernel.\n", 1512 xisr->sadb_x_ipsecrequest_reqid)); 1513 xisr->sadb_x_ipsecrequest_reqid = 0; 1514 } 1515 1516 /* allocate new reqid id if reqid is zero. */ 1517 if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1518 u_int16_t reqid; 1519 if ((reqid = key_newreqid()) == 0) { 1520 KEY_FREESP(&newsp); 1521 *error = ENOBUFS; 1522 return NULL; 1523 } 1524 (*p_isr)->saidx.reqid = reqid; 1525 xisr->sadb_x_ipsecrequest_reqid = reqid; 1526 } else { 1527 /* set it for manual keying. */ 1528 (*p_isr)->saidx.reqid = 1529 xisr->sadb_x_ipsecrequest_reqid; 1530 } 1531 break; 1532 1533 default: 1534 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n", 1535 xisr->sadb_x_ipsecrequest_level)); 1536 KEY_FREESP(&newsp); 1537 *error = EINVAL; 1538 return NULL; 1539 } 1540 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1541 1542 /* set IP addresses if there */ 1543 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1544 struct sockaddr *paddr; 1545 1546 paddr = (struct sockaddr *)(xisr + 1); 1547 1548 /* validity check */ 1549 if (paddr->sa_len 1550 > sizeof((*p_isr)->saidx.src)) { 1551 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1552 "address length.\n")); 1553 KEY_FREESP(&newsp); 1554 *error = EINVAL; 1555 return NULL; 1556 } 1557 bcopy(paddr, &(*p_isr)->saidx.src, 1558 paddr->sa_len); 1559 1560 paddr = (struct sockaddr *)((char *)paddr 1561 + paddr->sa_len); 1562 1563 /* validity check */ 1564 if (paddr->sa_len 1565 > sizeof((*p_isr)->saidx.dst)) { 1566 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request " 1567 "address length.\n")); 1568 KEY_FREESP(&newsp); 1569 *error = EINVAL; 1570 return NULL; 1571 } 1572 bcopy(paddr, &(*p_isr)->saidx.dst, 1573 paddr->sa_len); 1574 } 1575 1576 (*p_isr)->sav = NULL; 1577 (*p_isr)->sp = newsp; 1578 1579 /* initialization for the next. */ 1580 p_isr = &(*p_isr)->next; 1581 tlen -= xisr->sadb_x_ipsecrequest_len; 1582 1583 /* validity check */ 1584 if (tlen < 0) { 1585 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n")); 1586 KEY_FREESP(&newsp); 1587 *error = EINVAL; 1588 return NULL; 1589 } 1590 1591 xisr = (struct sadb_x_ipsecrequest *)((char *)xisr 1592 + xisr->sadb_x_ipsecrequest_len); 1593 } 1594 } 1595 break; 1596 default: 1597 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n")); 1598 KEY_FREESP(&newsp); 1599 *error = EINVAL; 1600 return NULL; 1601 } 1602 1603 *error = 0; 1604 return newsp; 1605 } 1606 1607 static u_int16_t 1608 key_newreqid() 1609 { 1610 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1611 1612 auto_reqid = (auto_reqid == 0xffff 1613 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1614 1615 /* XXX should be unique check */ 1616 1617 return auto_reqid; 1618 } 1619 1620 /* 1621 * copy secpolicy struct to sadb_x_policy structure indicated. 1622 */ 1623 struct mbuf * 1624 key_sp2msg(sp) 1625 struct secpolicy *sp; 1626 { 1627 struct sadb_x_policy *xpl; 1628 int tlen; 1629 char *p; 1630 struct mbuf *m; 1631 1632 /* sanity check. */ 1633 if (sp == NULL) 1634 panic("key_sp2msg: NULL pointer was passed"); 1635 1636 tlen = key_getspreqmsglen(sp); 1637 1638 m = key_alloc_mbuf(tlen); 1639 if (!m || m->m_next) { /*XXX*/ 1640 if (m) 1641 m_freem(m); 1642 return NULL; 1643 } 1644 1645 m->m_len = tlen; 1646 m->m_next = NULL; 1647 xpl = mtod(m, struct sadb_x_policy *); 1648 bzero(xpl, tlen); 1649 1650 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1651 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1652 xpl->sadb_x_policy_type = sp->policy; 1653 xpl->sadb_x_policy_dir = sp->spidx.dir; 1654 xpl->sadb_x_policy_id = sp->id; 1655 p = (char *)xpl + sizeof(*xpl); 1656 1657 /* if is the policy for ipsec ? */ 1658 if (sp->policy == IPSEC_POLICY_IPSEC) { 1659 struct sadb_x_ipsecrequest *xisr; 1660 struct ipsecrequest *isr; 1661 1662 for (isr = sp->req; isr != NULL; isr = isr->next) { 1663 1664 xisr = (struct sadb_x_ipsecrequest *)p; 1665 1666 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1667 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1668 xisr->sadb_x_ipsecrequest_level = isr->level; 1669 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1670 1671 p += sizeof(*xisr); 1672 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1673 p += isr->saidx.src.sa.sa_len; 1674 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1675 p += isr->saidx.src.sa.sa_len; 1676 1677 xisr->sadb_x_ipsecrequest_len = 1678 PFKEY_ALIGN8(sizeof(*xisr) 1679 + isr->saidx.src.sa.sa_len 1680 + isr->saidx.dst.sa.sa_len); 1681 } 1682 } 1683 1684 return m; 1685 } 1686 1687 /* m will not be freed nor modified */ 1688 static struct mbuf * 1689 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1690 int ndeep, int nitem, ...) 1691 { 1692 va_list ap; 1693 int idx; 1694 int i; 1695 struct mbuf *result = NULL, *n; 1696 int len; 1697 1698 if (m == NULL || mhp == NULL) 1699 panic("null pointer passed to key_gather"); 1700 1701 va_start(ap, nitem); 1702 for (i = 0; i < nitem; i++) { 1703 idx = va_arg(ap, int); 1704 if (idx < 0 || idx > SADB_EXT_MAX) 1705 goto fail; 1706 /* don't attempt to pull empty extension */ 1707 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1708 continue; 1709 if (idx != SADB_EXT_RESERVED && 1710 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1711 continue; 1712 1713 if (idx == SADB_EXT_RESERVED) { 1714 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1715 #ifdef DIAGNOSTIC 1716 if (len > MHLEN) 1717 panic("assumption failed"); 1718 #endif 1719 MGETHDR(n, M_DONTWAIT, MT_DATA); 1720 if (!n) 1721 goto fail; 1722 n->m_len = len; 1723 n->m_next = NULL; 1724 m_copydata(m, 0, sizeof(struct sadb_msg), 1725 mtod(n, void *)); 1726 } else if (i < ndeep) { 1727 len = mhp->extlen[idx]; 1728 n = key_alloc_mbuf(len); 1729 if (!n || n->m_next) { /*XXX*/ 1730 if (n) 1731 m_freem(n); 1732 goto fail; 1733 } 1734 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1735 mtod(n, void *)); 1736 } else { 1737 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1738 M_DONTWAIT); 1739 } 1740 if (n == NULL) 1741 goto fail; 1742 1743 if (result) 1744 m_cat(result, n); 1745 else 1746 result = n; 1747 } 1748 va_end(ap); 1749 1750 if ((result->m_flags & M_PKTHDR) != 0) { 1751 result->m_pkthdr.len = 0; 1752 for (n = result; n; n = n->m_next) 1753 result->m_pkthdr.len += n->m_len; 1754 } 1755 1756 return result; 1757 1758 fail: 1759 va_end(ap); 1760 m_freem(result); 1761 return NULL; 1762 } 1763 1764 /* 1765 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1766 * add an entry to SP database, when received 1767 * <base, address(SD), (lifetime(H),) policy> 1768 * from the user(?). 1769 * Adding to SP database, 1770 * and send 1771 * <base, address(SD), (lifetime(H),) policy> 1772 * to the socket which was send. 1773 * 1774 * SPDADD set a unique policy entry. 1775 * SPDSETIDX like SPDADD without a part of policy requests. 1776 * SPDUPDATE replace a unique policy entry. 1777 * 1778 * m will always be freed. 1779 */ 1780 static int 1781 key_spdadd(so, m, mhp) 1782 struct socket *so; 1783 struct mbuf *m; 1784 const struct sadb_msghdr *mhp; 1785 { 1786 struct sadb_address *src0, *dst0; 1787 struct sadb_x_policy *xpl0, *xpl; 1788 struct sadb_lifetime *lft = NULL; 1789 struct secpolicyindex spidx; 1790 struct secpolicy *newsp; 1791 int error; 1792 1793 /* sanity check */ 1794 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 1795 panic("key_spdadd: NULL pointer is passed"); 1796 1797 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1798 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1799 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1800 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1801 return key_senderror(so, m, EINVAL); 1802 } 1803 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1804 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1805 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1806 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1807 return key_senderror(so, m, EINVAL); 1808 } 1809 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1810 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1811 < sizeof(struct sadb_lifetime)) { 1812 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1813 return key_senderror(so, m, EINVAL); 1814 } 1815 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1816 } 1817 1818 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1819 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1820 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1821 1822 /* make secindex */ 1823 /* XXX boundary check against sa_len */ 1824 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1825 src0 + 1, 1826 dst0 + 1, 1827 src0->sadb_address_prefixlen, 1828 dst0->sadb_address_prefixlen, 1829 src0->sadb_address_proto, 1830 &spidx); 1831 1832 /* checking the direciton. */ 1833 switch (xpl0->sadb_x_policy_dir) { 1834 case IPSEC_DIR_INBOUND: 1835 case IPSEC_DIR_OUTBOUND: 1836 break; 1837 default: 1838 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n")); 1839 mhp->msg->sadb_msg_errno = EINVAL; 1840 return 0; 1841 } 1842 1843 /* check policy */ 1844 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1845 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1846 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1847 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n")); 1848 return key_senderror(so, m, EINVAL); 1849 } 1850 1851 /* policy requests are mandatory when action is ipsec. */ 1852 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1853 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1854 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1855 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n")); 1856 return key_senderror(so, m, EINVAL); 1857 } 1858 1859 /* 1860 * checking there is SP already or not. 1861 * SPDUPDATE doesn't depend on whether there is a SP or not. 1862 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1863 * then error. 1864 */ 1865 newsp = key_getsp(&spidx); 1866 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1867 if (newsp) { 1868 key_sp_dead(newsp); 1869 key_sp_unlink(newsp); /* XXX jrs ordering */ 1870 KEY_FREESP(&newsp); 1871 newsp = NULL; 1872 } 1873 } else { 1874 if (newsp != NULL) { 1875 KEY_FREESP(&newsp); 1876 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n")); 1877 return key_senderror(so, m, EEXIST); 1878 } 1879 } 1880 1881 /* allocation new SP entry */ 1882 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1883 return key_senderror(so, m, error); 1884 } 1885 1886 if ((newsp->id = key_getnewspid()) == 0) { 1887 KFREE(newsp); 1888 return key_senderror(so, m, ENOBUFS); 1889 } 1890 1891 /* XXX boundary check against sa_len */ 1892 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1893 src0 + 1, 1894 dst0 + 1, 1895 src0->sadb_address_prefixlen, 1896 dst0->sadb_address_prefixlen, 1897 src0->sadb_address_proto, 1898 &newsp->spidx); 1899 1900 /* sanity check on addr pair */ 1901 if (((struct sockaddr *)(src0 + 1))->sa_family != 1902 ((struct sockaddr *)(dst0+ 1))->sa_family) { 1903 KFREE(newsp); 1904 return key_senderror(so, m, EINVAL); 1905 } 1906 if (((struct sockaddr *)(src0 + 1))->sa_len != 1907 ((struct sockaddr *)(dst0+ 1))->sa_len) { 1908 KFREE(newsp); 1909 return key_senderror(so, m, EINVAL); 1910 } 1911 #if 1 1912 if (newsp->req && newsp->req->saidx.src.sa.sa_family) { 1913 struct sockaddr *sa; 1914 sa = (struct sockaddr *)(src0 + 1); 1915 if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) { 1916 KFREE(newsp); 1917 return key_senderror(so, m, EINVAL); 1918 } 1919 } 1920 if (newsp->req && newsp->req->saidx.dst.sa.sa_family) { 1921 struct sockaddr *sa; 1922 sa = (struct sockaddr *)(dst0 + 1); 1923 if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) { 1924 KFREE(newsp); 1925 return key_senderror(so, m, EINVAL); 1926 } 1927 } 1928 #endif 1929 1930 newsp->created = time_second; 1931 newsp->lastused = newsp->created; 1932 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1933 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1934 1935 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1936 newsp->state = IPSEC_SPSTATE_ALIVE; 1937 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1938 1939 /* delete the entry in spacqtree */ 1940 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1941 struct secspacq *spacq; 1942 if ((spacq = key_getspacq(&spidx)) != NULL) { 1943 /* reset counter in order to deletion by timehandler. */ 1944 spacq->created = time_second; 1945 spacq->count = 0; 1946 } 1947 } 1948 1949 #if defined(__NetBSD__) 1950 /* Invalidate all cached SPD pointers in the PCBs. */ 1951 ipsec_invalpcbcacheall(); 1952 1953 #if defined(GATEWAY) 1954 /* Invalidate the ipflow cache, as well. */ 1955 ipflow_invalidate_all(); 1956 #ifdef INET6 1957 ip6flow_invalidate_all(); 1958 #endif /* INET6 */ 1959 #endif /* GATEWAY */ 1960 #endif /* __NetBSD__ */ 1961 1962 { 1963 struct mbuf *n, *mpolicy; 1964 struct sadb_msg *newmsg; 1965 int off; 1966 1967 /* create new sadb_msg to reply. */ 1968 if (lft) { 1969 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1970 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1971 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1972 } else { 1973 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1974 SADB_X_EXT_POLICY, 1975 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1976 } 1977 if (!n) 1978 return key_senderror(so, m, ENOBUFS); 1979 1980 if (n->m_len < sizeof(*newmsg)) { 1981 n = m_pullup(n, sizeof(*newmsg)); 1982 if (!n) 1983 return key_senderror(so, m, ENOBUFS); 1984 } 1985 newmsg = mtod(n, struct sadb_msg *); 1986 newmsg->sadb_msg_errno = 0; 1987 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1988 1989 off = 0; 1990 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1991 sizeof(*xpl), &off); 1992 if (mpolicy == NULL) { 1993 /* n is already freed */ 1994 return key_senderror(so, m, ENOBUFS); 1995 } 1996 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 1997 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 1998 m_freem(n); 1999 return key_senderror(so, m, EINVAL); 2000 } 2001 xpl->sadb_x_policy_id = newsp->id; 2002 2003 m_freem(m); 2004 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2005 } 2006 } 2007 2008 /* 2009 * get new policy id. 2010 * OUT: 2011 * 0: failure. 2012 * others: success. 2013 */ 2014 static u_int32_t 2015 key_getnewspid() 2016 { 2017 u_int32_t newid = 0; 2018 int count = key_spi_trycnt; /* XXX */ 2019 struct secpolicy *sp; 2020 2021 /* when requesting to allocate spi ranged */ 2022 while (count--) { 2023 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2024 2025 if ((sp = key_getspbyid(newid)) == NULL) 2026 break; 2027 2028 KEY_FREESP(&sp); 2029 } 2030 2031 if (count == 0 || newid == 0) { 2032 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n")); 2033 return 0; 2034 } 2035 2036 return newid; 2037 } 2038 2039 /* 2040 * SADB_SPDDELETE processing 2041 * receive 2042 * <base, address(SD), policy(*)> 2043 * from the user(?), and set SADB_SASTATE_DEAD, 2044 * and send, 2045 * <base, address(SD), policy(*)> 2046 * to the ikmpd. 2047 * policy(*) including direction of policy. 2048 * 2049 * m will always be freed. 2050 */ 2051 static int 2052 key_spddelete(so, m, mhp) 2053 struct socket *so; 2054 struct mbuf *m; 2055 const struct sadb_msghdr *mhp; 2056 { 2057 struct sadb_address *src0, *dst0; 2058 struct sadb_x_policy *xpl0; 2059 struct secpolicyindex spidx; 2060 struct secpolicy *sp; 2061 2062 /* sanity check */ 2063 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2064 panic("key_spddelete: NULL pointer is passed"); 2065 2066 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2067 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2068 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2069 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2070 return key_senderror(so, m, EINVAL); 2071 } 2072 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2073 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2074 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2075 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n")); 2076 return key_senderror(so, m, EINVAL); 2077 } 2078 2079 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2080 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2081 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2082 2083 /* make secindex */ 2084 /* XXX boundary check against sa_len */ 2085 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2086 src0 + 1, 2087 dst0 + 1, 2088 src0->sadb_address_prefixlen, 2089 dst0->sadb_address_prefixlen, 2090 src0->sadb_address_proto, 2091 &spidx); 2092 2093 /* checking the direciton. */ 2094 switch (xpl0->sadb_x_policy_dir) { 2095 case IPSEC_DIR_INBOUND: 2096 case IPSEC_DIR_OUTBOUND: 2097 break; 2098 default: 2099 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n")); 2100 return key_senderror(so, m, EINVAL); 2101 } 2102 2103 /* Is there SP in SPD ? */ 2104 if ((sp = key_getsp(&spidx)) == NULL) { 2105 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n")); 2106 return key_senderror(so, m, EINVAL); 2107 } 2108 2109 /* save policy id to buffer to be returned. */ 2110 xpl0->sadb_x_policy_id = sp->id; 2111 2112 key_sp_dead(sp); 2113 key_sp_unlink(sp); /* XXX jrs ordering */ 2114 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2115 2116 #if defined(__NetBSD__) 2117 /* Invalidate all cached SPD pointers in the PCBs. */ 2118 ipsec_invalpcbcacheall(); 2119 2120 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2121 #endif /* __NetBSD__ */ 2122 2123 { 2124 struct mbuf *n; 2125 struct sadb_msg *newmsg; 2126 2127 /* create new sadb_msg to reply. */ 2128 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2129 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2130 if (!n) 2131 return key_senderror(so, m, ENOBUFS); 2132 2133 newmsg = mtod(n, struct sadb_msg *); 2134 newmsg->sadb_msg_errno = 0; 2135 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2136 2137 m_freem(m); 2138 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2139 } 2140 } 2141 2142 /* 2143 * SADB_SPDDELETE2 processing 2144 * receive 2145 * <base, policy(*)> 2146 * from the user(?), and set SADB_SASTATE_DEAD, 2147 * and send, 2148 * <base, policy(*)> 2149 * to the ikmpd. 2150 * policy(*) including direction of policy. 2151 * 2152 * m will always be freed. 2153 */ 2154 static int 2155 key_spddelete2(so, m, mhp) 2156 struct socket *so; 2157 struct mbuf *m; 2158 const struct sadb_msghdr *mhp; 2159 { 2160 u_int32_t id; 2161 struct secpolicy *sp; 2162 2163 /* sanity check */ 2164 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2165 panic("key_spddelete2: NULL pointer is passed"); 2166 2167 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2168 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2169 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n")); 2170 key_senderror(so, m, EINVAL); 2171 return 0; 2172 } 2173 2174 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2175 2176 /* Is there SP in SPD ? */ 2177 if ((sp = key_getspbyid(id)) == NULL) { 2178 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id)); 2179 return key_senderror(so, m, EINVAL); 2180 } 2181 2182 key_sp_dead(sp); 2183 key_sp_unlink(sp); /* XXX jrs ordering */ 2184 KEY_FREESP(&sp); /* ref gained by key_getsp */ 2185 sp = NULL; 2186 2187 #if defined(__NetBSD__) 2188 /* Invalidate all cached SPD pointers in the PCBs. */ 2189 ipsec_invalpcbcacheall(); 2190 2191 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2192 #endif /* __NetBSD__ */ 2193 2194 { 2195 struct mbuf *n, *nn; 2196 struct sadb_msg *newmsg; 2197 int off, len; 2198 2199 /* create new sadb_msg to reply. */ 2200 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2201 2202 if (len > MCLBYTES) 2203 return key_senderror(so, m, ENOBUFS); 2204 MGETHDR(n, M_DONTWAIT, MT_DATA); 2205 if (n && len > MHLEN) { 2206 MCLGET(n, M_DONTWAIT); 2207 if ((n->m_flags & M_EXT) == 0) { 2208 m_freem(n); 2209 n = NULL; 2210 } 2211 } 2212 if (!n) 2213 return key_senderror(so, m, ENOBUFS); 2214 2215 n->m_len = len; 2216 n->m_next = NULL; 2217 off = 0; 2218 2219 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2220 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2221 2222 #ifdef DIAGNOSTIC 2223 if (off != len) 2224 panic("length inconsistency in key_spddelete2"); 2225 #endif 2226 2227 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2228 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2229 if (!n->m_next) { 2230 m_freem(n); 2231 return key_senderror(so, m, ENOBUFS); 2232 } 2233 2234 n->m_pkthdr.len = 0; 2235 for (nn = n; nn; nn = nn->m_next) 2236 n->m_pkthdr.len += nn->m_len; 2237 2238 newmsg = mtod(n, struct sadb_msg *); 2239 newmsg->sadb_msg_errno = 0; 2240 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2241 2242 m_freem(m); 2243 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2244 } 2245 } 2246 2247 /* 2248 * SADB_X_GET processing 2249 * receive 2250 * <base, policy(*)> 2251 * from the user(?), 2252 * and send, 2253 * <base, address(SD), policy> 2254 * to the ikmpd. 2255 * policy(*) including direction of policy. 2256 * 2257 * m will always be freed. 2258 */ 2259 static int 2260 key_spdget(so, m, mhp) 2261 struct socket *so; 2262 struct mbuf *m; 2263 const struct sadb_msghdr *mhp; 2264 { 2265 u_int32_t id; 2266 struct secpolicy *sp; 2267 struct mbuf *n; 2268 2269 /* sanity check */ 2270 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2271 panic("key_spdget: NULL pointer is passed"); 2272 2273 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2274 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2275 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n")); 2276 return key_senderror(so, m, EINVAL); 2277 } 2278 2279 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2280 2281 /* Is there SP in SPD ? */ 2282 if ((sp = key_getspbyid(id)) == NULL) { 2283 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id)); 2284 return key_senderror(so, m, ENOENT); 2285 } 2286 2287 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2288 mhp->msg->sadb_msg_pid); 2289 KEY_FREESP(&sp); /* ref gained by key_getspbyid */ 2290 if (n != NULL) { 2291 m_freem(m); 2292 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2293 } else 2294 return key_senderror(so, m, ENOBUFS); 2295 } 2296 2297 /* 2298 * SADB_X_SPDACQUIRE processing. 2299 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2300 * send 2301 * <base, policy(*)> 2302 * to KMD, and expect to receive 2303 * <base> with SADB_X_SPDACQUIRE if error occurred, 2304 * or 2305 * <base, policy> 2306 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2307 * policy(*) is without policy requests. 2308 * 2309 * 0 : succeed 2310 * others: error number 2311 */ 2312 int 2313 key_spdacquire(sp) 2314 struct secpolicy *sp; 2315 { 2316 struct mbuf *result = NULL, *m; 2317 struct secspacq *newspacq; 2318 int error; 2319 2320 /* sanity check */ 2321 if (sp == NULL) 2322 panic("key_spdacquire: NULL pointer is passed"); 2323 if (sp->req != NULL) 2324 panic("key_spdacquire: called but there is request"); 2325 if (sp->policy != IPSEC_POLICY_IPSEC) 2326 panic("key_spdacquire: policy mismathed. IPsec is expected"); 2327 2328 /* Get an entry to check whether sent message or not. */ 2329 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) { 2330 if (key_blockacq_count < newspacq->count) { 2331 /* reset counter and do send message. */ 2332 newspacq->count = 0; 2333 } else { 2334 /* increment counter and do nothing. */ 2335 newspacq->count++; 2336 return 0; 2337 } 2338 } else { 2339 /* make new entry for blocking to send SADB_ACQUIRE. */ 2340 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) 2341 return ENOBUFS; 2342 2343 /* add to acqtree */ 2344 LIST_INSERT_HEAD(&spacqtree, newspacq, chain); 2345 } 2346 2347 /* create new sadb_msg to reply. */ 2348 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2349 if (!m) { 2350 error = ENOBUFS; 2351 goto fail; 2352 } 2353 result = m; 2354 2355 result->m_pkthdr.len = 0; 2356 for (m = result; m; m = m->m_next) 2357 result->m_pkthdr.len += m->m_len; 2358 2359 mtod(result, struct sadb_msg *)->sadb_msg_len = 2360 PFKEY_UNIT64(result->m_pkthdr.len); 2361 2362 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2363 2364 fail: 2365 if (result) 2366 m_freem(result); 2367 return error; 2368 } 2369 2370 /* 2371 * SADB_SPDFLUSH processing 2372 * receive 2373 * <base> 2374 * from the user, and free all entries in secpctree. 2375 * and send, 2376 * <base> 2377 * to the user. 2378 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2379 * 2380 * m will always be freed. 2381 */ 2382 static int 2383 key_spdflush(so, m, mhp) 2384 struct socket *so; 2385 struct mbuf *m; 2386 const struct sadb_msghdr *mhp; 2387 { 2388 struct sadb_msg *newmsg; 2389 struct secpolicy *sp; 2390 u_int dir; 2391 2392 /* sanity check */ 2393 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2394 panic("key_spdflush: NULL pointer is passed"); 2395 2396 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2397 return key_senderror(so, m, EINVAL); 2398 2399 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2400 struct secpolicy * nextsp; 2401 for (sp = LIST_FIRST(&sptree[dir]); 2402 sp != NULL; 2403 sp = nextsp) { 2404 2405 nextsp = LIST_NEXT(sp, chain); 2406 if (sp->state == IPSEC_SPSTATE_DEAD) 2407 continue; 2408 key_sp_dead(sp); 2409 key_sp_unlink(sp); 2410 /* 'sp' dead; continue transfers to 'sp = nextsp' */ 2411 continue; 2412 } 2413 } 2414 2415 #if defined(__NetBSD__) 2416 /* Invalidate all cached SPD pointers in the PCBs. */ 2417 ipsec_invalpcbcacheall(); 2418 2419 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2420 #endif /* __NetBSD__ */ 2421 2422 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2423 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n")); 2424 return key_senderror(so, m, ENOBUFS); 2425 } 2426 2427 if (m->m_next) 2428 m_freem(m->m_next); 2429 m->m_next = NULL; 2430 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2431 newmsg = mtod(m, struct sadb_msg *); 2432 newmsg->sadb_msg_errno = 0; 2433 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2434 2435 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2436 } 2437 2438 static struct sockaddr key_src = { 2439 .sa_len = 2, 2440 .sa_family = PF_KEY, 2441 }; 2442 2443 static struct mbuf * 2444 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2445 { 2446 struct secpolicy *sp; 2447 int cnt; 2448 u_int dir; 2449 struct mbuf *m, *n, *prev; 2450 int totlen; 2451 2452 *lenp = 0; 2453 2454 /* search SPD entry and get buffer size. */ 2455 cnt = 0; 2456 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2457 LIST_FOREACH(sp, &sptree[dir], chain) { 2458 cnt++; 2459 } 2460 } 2461 2462 if (cnt == 0) { 2463 *errorp = ENOENT; 2464 return (NULL); 2465 } 2466 2467 m = NULL; 2468 prev = m; 2469 totlen = 0; 2470 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2471 LIST_FOREACH(sp, &sptree[dir], chain) { 2472 --cnt; 2473 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2474 2475 if (!n) { 2476 *errorp = ENOBUFS; 2477 if (m) m_freem(m); 2478 return (NULL); 2479 } 2480 2481 totlen += n->m_pkthdr.len; 2482 if (!m) { 2483 m = n; 2484 } else { 2485 prev->m_nextpkt = n; 2486 } 2487 prev = n; 2488 } 2489 } 2490 2491 *lenp = totlen; 2492 *errorp = 0; 2493 return (m); 2494 } 2495 2496 /* 2497 * SADB_SPDDUMP processing 2498 * receive 2499 * <base> 2500 * from the user, and dump all SP leaves 2501 * and send, 2502 * <base> ..... 2503 * to the ikmpd. 2504 * 2505 * m will always be freed. 2506 */ 2507 static int 2508 key_spddump(so, m0, mhp) 2509 struct socket *so; 2510 struct mbuf *m0; 2511 const struct sadb_msghdr *mhp; 2512 { 2513 struct mbuf *n; 2514 int error, len; 2515 int ok, s; 2516 pid_t pid; 2517 2518 /* sanity check */ 2519 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 2520 panic("key_spddump: NULL pointer is passed"); 2521 2522 2523 pid = mhp->msg->sadb_msg_pid; 2524 /* 2525 * If the requestor has insufficient socket-buffer space 2526 * for the entire chain, nobody gets any response to the DUMP. 2527 * XXX For now, only the requestor ever gets anything. 2528 * Moreover, if the requestor has any space at all, they receive 2529 * the entire chain, otherwise the request is refused with ENOBUFS. 2530 */ 2531 if (sbspace(&so->so_rcv) <= 0) { 2532 return key_senderror(so, m0, ENOBUFS); 2533 } 2534 2535 s = splsoftnet(); 2536 n = key_setspddump_chain(&error, &len, pid); 2537 splx(s); 2538 2539 if (n == NULL) { 2540 return key_senderror(so, m0, ENOENT); 2541 } 2542 pfkeystat.in_total++; 2543 pfkeystat.in_bytes += len; 2544 2545 /* 2546 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2547 * The requestor receives either the entire chain, or an 2548 * error message with ENOBUFS. 2549 */ 2550 2551 /* 2552 * sbappendchainwith record takes the chain of entries, one 2553 * packet-record per SPD entry, prepends the key_src sockaddr 2554 * to each packet-record, links the sockaddr mbufs into a new 2555 * list of records, then appends the entire resulting 2556 * list to the requesting socket. 2557 */ 2558 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 2559 n, SB_PRIO_ONESHOT_OVERFLOW); 2560 2561 if (!ok) { 2562 pfkeystat.in_nomem++; 2563 m_freem(n); 2564 return key_senderror(so, m0, ENOBUFS); 2565 } 2566 2567 m_freem(m0); 2568 return error; 2569 } 2570 2571 #ifdef IPSEC_NAT_T 2572 /* 2573 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2574 */ 2575 static int 2576 key_nat_map(so, m, mhp) 2577 struct socket *so; 2578 struct mbuf *m; 2579 const struct sadb_msghdr *mhp; 2580 { 2581 struct sadb_x_nat_t_type *type; 2582 struct sadb_x_nat_t_port *sport; 2583 struct sadb_x_nat_t_port *dport; 2584 struct sadb_address *addr; 2585 struct sadb_x_nat_t_frag *frag; 2586 2587 /* sanity check */ 2588 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 2589 panic("key_nat_map: NULL pointer is passed."); 2590 2591 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2592 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2593 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2594 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2595 return key_senderror(so, m, EINVAL); 2596 } 2597 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2598 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2599 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2600 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n")); 2601 return key_senderror(so, m, EINVAL); 2602 } 2603 2604 if ((mhp->ext[SADB_X_EXT_NAT_T_OA] != NULL) && 2605 (mhp->extlen[SADB_X_EXT_NAT_T_OA] < sizeof(*addr))) { 2606 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2607 return key_senderror(so, m, EINVAL); 2608 } 2609 2610 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2611 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2612 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n")); 2613 return key_senderror(so, m, EINVAL); 2614 } 2615 2616 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2617 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2618 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2619 addr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OA]; 2620 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2621 2622 printf("sadb_nat_map called\n"); 2623 2624 /* 2625 * XXX handle that, it should also contain a SA, or anything 2626 * that enable to update the SA information. 2627 */ 2628 2629 return 0; 2630 } 2631 #endif /* IPSEC_NAT_T */ 2632 2633 static struct mbuf * 2634 key_setdumpsp(sp, type, seq, pid) 2635 struct secpolicy *sp; 2636 u_int8_t type; 2637 u_int32_t seq; 2638 pid_t pid; 2639 { 2640 struct mbuf *result = NULL, *m; 2641 2642 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2643 if (!m) 2644 goto fail; 2645 result = m; 2646 2647 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2648 &sp->spidx.src.sa, sp->spidx.prefs, 2649 sp->spidx.ul_proto); 2650 if (!m) 2651 goto fail; 2652 m_cat(result, m); 2653 2654 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2655 &sp->spidx.dst.sa, sp->spidx.prefd, 2656 sp->spidx.ul_proto); 2657 if (!m) 2658 goto fail; 2659 m_cat(result, m); 2660 2661 m = key_sp2msg(sp); 2662 if (!m) 2663 goto fail; 2664 m_cat(result, m); 2665 2666 if ((result->m_flags & M_PKTHDR) == 0) 2667 goto fail; 2668 2669 if (result->m_len < sizeof(struct sadb_msg)) { 2670 result = m_pullup(result, sizeof(struct sadb_msg)); 2671 if (result == NULL) 2672 goto fail; 2673 } 2674 2675 result->m_pkthdr.len = 0; 2676 for (m = result; m; m = m->m_next) 2677 result->m_pkthdr.len += m->m_len; 2678 2679 mtod(result, struct sadb_msg *)->sadb_msg_len = 2680 PFKEY_UNIT64(result->m_pkthdr.len); 2681 2682 return result; 2683 2684 fail: 2685 m_freem(result); 2686 return NULL; 2687 } 2688 2689 /* 2690 * get PFKEY message length for security policy and request. 2691 */ 2692 static u_int 2693 key_getspreqmsglen(sp) 2694 struct secpolicy *sp; 2695 { 2696 u_int tlen; 2697 2698 tlen = sizeof(struct sadb_x_policy); 2699 2700 /* if is the policy for ipsec ? */ 2701 if (sp->policy != IPSEC_POLICY_IPSEC) 2702 return tlen; 2703 2704 /* get length of ipsec requests */ 2705 { 2706 struct ipsecrequest *isr; 2707 int len; 2708 2709 for (isr = sp->req; isr != NULL; isr = isr->next) { 2710 len = sizeof(struct sadb_x_ipsecrequest) 2711 + isr->saidx.src.sa.sa_len 2712 + isr->saidx.dst.sa.sa_len; 2713 2714 tlen += PFKEY_ALIGN8(len); 2715 } 2716 } 2717 2718 return tlen; 2719 } 2720 2721 /* 2722 * SADB_SPDEXPIRE processing 2723 * send 2724 * <base, address(SD), lifetime(CH), policy> 2725 * to KMD by PF_KEY. 2726 * 2727 * OUT: 0 : succeed 2728 * others : error number 2729 */ 2730 static int 2731 key_spdexpire(sp) 2732 struct secpolicy *sp; 2733 { 2734 int s; 2735 struct mbuf *result = NULL, *m; 2736 int len; 2737 int error = -1; 2738 struct sadb_lifetime *lt; 2739 2740 /* XXX: Why do we lock ? */ 2741 s = splsoftnet(); /*called from softclock()*/ 2742 2743 /* sanity check */ 2744 if (sp == NULL) 2745 panic("key_spdexpire: NULL pointer is passed"); 2746 2747 /* set msg header */ 2748 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2749 if (!m) { 2750 error = ENOBUFS; 2751 goto fail; 2752 } 2753 result = m; 2754 2755 /* create lifetime extension (current and hard) */ 2756 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2757 m = key_alloc_mbuf(len); 2758 if (!m || m->m_next) { /*XXX*/ 2759 if (m) 2760 m_freem(m); 2761 error = ENOBUFS; 2762 goto fail; 2763 } 2764 bzero(mtod(m, void *), len); 2765 lt = mtod(m, struct sadb_lifetime *); 2766 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2767 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2768 lt->sadb_lifetime_allocations = 0; 2769 lt->sadb_lifetime_bytes = 0; 2770 lt->sadb_lifetime_addtime = sp->created; 2771 lt->sadb_lifetime_usetime = sp->lastused; 2772 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2773 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2774 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2775 lt->sadb_lifetime_allocations = 0; 2776 lt->sadb_lifetime_bytes = 0; 2777 lt->sadb_lifetime_addtime = sp->lifetime; 2778 lt->sadb_lifetime_usetime = sp->validtime; 2779 m_cat(result, m); 2780 2781 /* set sadb_address for source */ 2782 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2783 &sp->spidx.src.sa, 2784 sp->spidx.prefs, sp->spidx.ul_proto); 2785 if (!m) { 2786 error = ENOBUFS; 2787 goto fail; 2788 } 2789 m_cat(result, m); 2790 2791 /* set sadb_address for destination */ 2792 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2793 &sp->spidx.dst.sa, 2794 sp->spidx.prefd, sp->spidx.ul_proto); 2795 if (!m) { 2796 error = ENOBUFS; 2797 goto fail; 2798 } 2799 m_cat(result, m); 2800 2801 /* set secpolicy */ 2802 m = key_sp2msg(sp); 2803 if (!m) { 2804 error = ENOBUFS; 2805 goto fail; 2806 } 2807 m_cat(result, m); 2808 2809 if ((result->m_flags & M_PKTHDR) == 0) { 2810 error = EINVAL; 2811 goto fail; 2812 } 2813 2814 if (result->m_len < sizeof(struct sadb_msg)) { 2815 result = m_pullup(result, sizeof(struct sadb_msg)); 2816 if (result == NULL) { 2817 error = ENOBUFS; 2818 goto fail; 2819 } 2820 } 2821 2822 result->m_pkthdr.len = 0; 2823 for (m = result; m; m = m->m_next) 2824 result->m_pkthdr.len += m->m_len; 2825 2826 mtod(result, struct sadb_msg *)->sadb_msg_len = 2827 PFKEY_UNIT64(result->m_pkthdr.len); 2828 2829 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2830 2831 fail: 2832 if (result) 2833 m_freem(result); 2834 splx(s); 2835 return error; 2836 } 2837 2838 /* %%% SAD management */ 2839 /* 2840 * allocating a memory for new SA head, and copy from the values of mhp. 2841 * OUT: NULL : failure due to the lack of memory. 2842 * others : pointer to new SA head. 2843 */ 2844 static struct secashead * 2845 key_newsah(saidx) 2846 struct secasindex *saidx; 2847 { 2848 struct secashead *newsah; 2849 2850 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx")); 2851 2852 newsah = (struct secashead *) 2853 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO); 2854 if (newsah != NULL) { 2855 int i; 2856 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2857 LIST_INIT(&newsah->savtree[i]); 2858 newsah->saidx = *saidx; 2859 2860 /* add to saidxtree */ 2861 newsah->state = SADB_SASTATE_MATURE; 2862 LIST_INSERT_HEAD(&sahtree, newsah, chain); 2863 } 2864 return(newsah); 2865 } 2866 2867 /* 2868 * delete SA index and all SA registerd. 2869 */ 2870 static void 2871 key_delsah(sah) 2872 struct secashead *sah; 2873 { 2874 struct secasvar *sav, *nextsav; 2875 u_int stateidx, state; 2876 int s; 2877 int zombie = 0; 2878 2879 /* sanity check */ 2880 if (sah == NULL) 2881 panic("key_delsah: NULL pointer is passed"); 2882 2883 s = splsoftnet(); /*called from softclock()*/ 2884 2885 /* searching all SA registerd in the secindex. */ 2886 for (stateidx = 0; 2887 stateidx < _ARRAYLEN(saorder_state_any); 2888 stateidx++) { 2889 2890 state = saorder_state_any[stateidx]; 2891 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]); 2892 sav != NULL; 2893 sav = nextsav) { 2894 2895 nextsav = LIST_NEXT(sav, chain); 2896 2897 if (sav->refcnt == 0) { 2898 /* sanity check */ 2899 KEY_CHKSASTATE(state, sav->state, "key_delsah"); 2900 KEY_FREESAV(&sav); 2901 } else { 2902 /* give up to delete this sa */ 2903 zombie++; 2904 } 2905 } 2906 } 2907 2908 /* don't delete sah only if there are savs. */ 2909 if (zombie) { 2910 splx(s); 2911 return; 2912 } 2913 2914 rtcache_free(&sah->sa_route); 2915 2916 /* remove from tree of SA index */ 2917 if (__LIST_CHAINED(sah)) 2918 LIST_REMOVE(sah, chain); 2919 2920 KFREE(sah); 2921 2922 splx(s); 2923 return; 2924 } 2925 2926 /* 2927 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2928 * and copy the values of mhp into new buffer. 2929 * When SAD message type is GETSPI: 2930 * to set sequence number from acq_seq++, 2931 * to set zero to SPI. 2932 * not to call key_setsava(). 2933 * OUT: NULL : fail 2934 * others : pointer to new secasvar. 2935 * 2936 * does not modify mbuf. does not free mbuf on error. 2937 */ 2938 static struct secasvar * 2939 key_newsav(m, mhp, sah, errp, where, tag) 2940 struct mbuf *m; 2941 const struct sadb_msghdr *mhp; 2942 struct secashead *sah; 2943 int *errp; 2944 const char* where; 2945 int tag; 2946 { 2947 struct secasvar *newsav; 2948 const struct sadb_sa *xsa; 2949 2950 /* sanity check */ 2951 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL) 2952 panic("key_newsa: NULL pointer is passed"); 2953 2954 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar)); 2955 if (newsav == NULL) { 2956 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n")); 2957 *errp = ENOBUFS; 2958 goto done; 2959 } 2960 bzero(newsav, sizeof(struct secasvar)); 2961 2962 switch (mhp->msg->sadb_msg_type) { 2963 case SADB_GETSPI: 2964 newsav->spi = 0; 2965 2966 #ifdef IPSEC_DOSEQCHECK 2967 /* sync sequence number */ 2968 if (mhp->msg->sadb_msg_seq == 0) 2969 newsav->seq = 2970 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2971 else 2972 #endif 2973 newsav->seq = mhp->msg->sadb_msg_seq; 2974 break; 2975 2976 case SADB_ADD: 2977 /* sanity check */ 2978 if (mhp->ext[SADB_EXT_SA] == NULL) { 2979 KFREE(newsav), newsav = NULL; 2980 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n")); 2981 *errp = EINVAL; 2982 goto done; 2983 } 2984 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2985 newsav->spi = xsa->sadb_sa_spi; 2986 newsav->seq = mhp->msg->sadb_msg_seq; 2987 break; 2988 default: 2989 KFREE(newsav), newsav = NULL; 2990 *errp = EINVAL; 2991 goto done; 2992 } 2993 2994 /* copy sav values */ 2995 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2996 *errp = key_setsaval(newsav, m, mhp); 2997 if (*errp) { 2998 KFREE(newsav), newsav = NULL; 2999 goto done; 3000 } 3001 } 3002 3003 /* reset created */ 3004 newsav->created = time_second; 3005 newsav->pid = mhp->msg->sadb_msg_pid; 3006 3007 /* add to satree */ 3008 newsav->sah = sah; 3009 newsav->refcnt = 1; 3010 newsav->state = SADB_SASTATE_LARVAL; 3011 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 3012 secasvar, chain); 3013 done: 3014 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3015 printf("DP key_newsav from %s:%u return SP:%p\n", 3016 where, tag, newsav)); 3017 3018 return newsav; 3019 } 3020 3021 /* 3022 * free() SA variable entry. 3023 */ 3024 static void 3025 key_delsav(sav) 3026 struct secasvar *sav; 3027 { 3028 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav")); 3029 IPSEC_ASSERT(sav->refcnt == 0, 3030 ("key_delsav: reference count %u > 0", sav->refcnt)); 3031 3032 /* remove from SA header */ 3033 if (__LIST_CHAINED(sav)) 3034 LIST_REMOVE(sav, chain); 3035 3036 /* 3037 * Cleanup xform state. Note that zeroize'ing causes the 3038 * keys to be cleared; otherwise we must do it ourself. 3039 */ 3040 if (sav->tdb_xform != NULL) { 3041 sav->tdb_xform->xf_zeroize(sav); 3042 sav->tdb_xform = NULL; 3043 } else { 3044 if (sav->key_auth != NULL) 3045 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth)); 3046 if (sav->key_enc != NULL) 3047 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc)); 3048 } 3049 if (sav->key_auth != NULL) { 3050 KFREE(sav->key_auth); 3051 sav->key_auth = NULL; 3052 } 3053 if (sav->key_enc != NULL) { 3054 KFREE(sav->key_enc); 3055 sav->key_enc = NULL; 3056 } 3057 if (sav->sched) { 3058 bzero(sav->sched, sav->schedlen); 3059 KFREE(sav->sched); 3060 sav->sched = NULL; 3061 } 3062 if (sav->replay != NULL) { 3063 KFREE(sav->replay); 3064 sav->replay = NULL; 3065 } 3066 if (sav->lft_c != NULL) { 3067 KFREE(sav->lft_c); 3068 sav->lft_c = NULL; 3069 } 3070 if (sav->lft_h != NULL) { 3071 KFREE(sav->lft_h); 3072 sav->lft_h = NULL; 3073 } 3074 if (sav->lft_s != NULL) { 3075 KFREE(sav->lft_s); 3076 sav->lft_s = NULL; 3077 } 3078 if (sav->iv != NULL) { 3079 KFREE(sav->iv); 3080 sav->iv = NULL; 3081 } 3082 3083 KFREE(sav); 3084 3085 return; 3086 } 3087 3088 /* 3089 * search SAD. 3090 * OUT: 3091 * NULL : not found 3092 * others : found, pointer to a SA. 3093 */ 3094 static struct secashead * 3095 key_getsah(saidx) 3096 struct secasindex *saidx; 3097 { 3098 struct secashead *sah; 3099 3100 LIST_FOREACH(sah, &sahtree, chain) { 3101 if (sah->state == SADB_SASTATE_DEAD) 3102 continue; 3103 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 3104 return sah; 3105 } 3106 3107 return NULL; 3108 } 3109 3110 /* 3111 * check not to be duplicated SPI. 3112 * NOTE: this function is too slow due to searching all SAD. 3113 * OUT: 3114 * NULL : not found 3115 * others : found, pointer to a SA. 3116 */ 3117 static struct secasvar * 3118 key_checkspidup(saidx, spi) 3119 struct secasindex *saidx; 3120 u_int32_t spi; 3121 { 3122 struct secashead *sah; 3123 struct secasvar *sav; 3124 3125 /* check address family */ 3126 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3127 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n")); 3128 return NULL; 3129 } 3130 3131 /* check all SAD */ 3132 LIST_FOREACH(sah, &sahtree, chain) { 3133 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3134 continue; 3135 sav = key_getsavbyspi(sah, spi); 3136 if (sav != NULL) 3137 return sav; 3138 } 3139 3140 return NULL; 3141 } 3142 3143 /* 3144 * search SAD litmited alive SA, protocol, SPI. 3145 * OUT: 3146 * NULL : not found 3147 * others : found, pointer to a SA. 3148 */ 3149 static struct secasvar * 3150 key_getsavbyspi(sah, spi) 3151 struct secashead *sah; 3152 u_int32_t spi; 3153 { 3154 struct secasvar *sav; 3155 u_int stateidx, state; 3156 3157 /* search all status */ 3158 for (stateidx = 0; 3159 stateidx < _ARRAYLEN(saorder_state_alive); 3160 stateidx++) { 3161 3162 state = saorder_state_alive[stateidx]; 3163 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3164 3165 /* sanity check */ 3166 if (sav->state != state) { 3167 ipseclog((LOG_DEBUG, "key_getsavbyspi: " 3168 "invalid sav->state (queue: %d SA: %d)\n", 3169 state, sav->state)); 3170 continue; 3171 } 3172 3173 if (sav->spi == spi) 3174 return sav; 3175 } 3176 } 3177 3178 return NULL; 3179 } 3180 3181 /* 3182 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3183 * You must update these if need. 3184 * OUT: 0: success. 3185 * !0: failure. 3186 * 3187 * does not modify mbuf. does not free mbuf on error. 3188 */ 3189 static int 3190 key_setsaval(sav, m, mhp) 3191 struct secasvar *sav; 3192 struct mbuf *m; 3193 const struct sadb_msghdr *mhp; 3194 { 3195 int error = 0; 3196 3197 /* sanity check */ 3198 if (m == NULL || mhp == NULL || mhp->msg == NULL) 3199 panic("key_setsaval: NULL pointer is passed"); 3200 3201 /* initialization */ 3202 sav->replay = NULL; 3203 sav->key_auth = NULL; 3204 sav->key_enc = NULL; 3205 sav->sched = NULL; 3206 sav->schedlen = 0; 3207 sav->iv = NULL; 3208 sav->lft_c = NULL; 3209 sav->lft_h = NULL; 3210 sav->lft_s = NULL; 3211 sav->tdb_xform = NULL; /* transform */ 3212 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3213 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3214 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3215 #ifdef IPSEC_NAT_T 3216 sav->natt_type = 0; 3217 sav->esp_frag = 0; 3218 #endif 3219 3220 /* SA */ 3221 if (mhp->ext[SADB_EXT_SA] != NULL) { 3222 const struct sadb_sa *sa0; 3223 3224 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3225 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3226 error = EINVAL; 3227 goto fail; 3228 } 3229 3230 sav->alg_auth = sa0->sadb_sa_auth; 3231 sav->alg_enc = sa0->sadb_sa_encrypt; 3232 sav->flags = sa0->sadb_sa_flags; 3233 3234 /* replay window */ 3235 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3236 sav->replay = (struct secreplay *) 3237 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO); 3238 if (sav->replay == NULL) { 3239 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3240 error = ENOBUFS; 3241 goto fail; 3242 } 3243 if (sa0->sadb_sa_replay != 0) 3244 sav->replay->bitmap = (char*)(sav->replay+1); 3245 sav->replay->wsize = sa0->sadb_sa_replay; 3246 } 3247 } 3248 3249 /* Authentication keys */ 3250 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3251 const struct sadb_key *key0; 3252 int len; 3253 3254 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3255 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3256 3257 error = 0; 3258 if (len < sizeof(*key0)) { 3259 error = EINVAL; 3260 goto fail; 3261 } 3262 switch (mhp->msg->sadb_msg_satype) { 3263 case SADB_SATYPE_AH: 3264 case SADB_SATYPE_ESP: 3265 case SADB_X_SATYPE_TCPSIGNATURE: 3266 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3267 sav->alg_auth != SADB_X_AALG_NULL) 3268 error = EINVAL; 3269 break; 3270 case SADB_X_SATYPE_IPCOMP: 3271 default: 3272 error = EINVAL; 3273 break; 3274 } 3275 if (error) { 3276 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n")); 3277 goto fail; 3278 } 3279 3280 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len); 3281 if (sav->key_auth == NULL) { 3282 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3283 error = ENOBUFS; 3284 goto fail; 3285 } 3286 } 3287 3288 /* Encryption key */ 3289 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3290 const struct sadb_key *key0; 3291 int len; 3292 3293 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3294 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3295 3296 error = 0; 3297 if (len < sizeof(*key0)) { 3298 error = EINVAL; 3299 goto fail; 3300 } 3301 switch (mhp->msg->sadb_msg_satype) { 3302 case SADB_SATYPE_ESP: 3303 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3304 sav->alg_enc != SADB_EALG_NULL) { 3305 error = EINVAL; 3306 break; 3307 } 3308 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len); 3309 if (sav->key_enc == NULL) { 3310 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3311 error = ENOBUFS; 3312 goto fail; 3313 } 3314 break; 3315 case SADB_X_SATYPE_IPCOMP: 3316 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3317 error = EINVAL; 3318 sav->key_enc = NULL; /*just in case*/ 3319 break; 3320 case SADB_SATYPE_AH: 3321 case SADB_X_SATYPE_TCPSIGNATURE: 3322 default: 3323 error = EINVAL; 3324 break; 3325 } 3326 if (error) { 3327 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n")); 3328 goto fail; 3329 } 3330 } 3331 3332 /* set iv */ 3333 sav->ivlen = 0; 3334 3335 switch (mhp->msg->sadb_msg_satype) { 3336 case SADB_SATYPE_AH: 3337 error = xform_init(sav, XF_AH); 3338 break; 3339 case SADB_SATYPE_ESP: 3340 error = xform_init(sav, XF_ESP); 3341 break; 3342 case SADB_X_SATYPE_IPCOMP: 3343 error = xform_init(sav, XF_IPCOMP); 3344 break; 3345 case SADB_X_SATYPE_TCPSIGNATURE: 3346 error = xform_init(sav, XF_TCPSIGNATURE); 3347 break; 3348 } 3349 if (error) { 3350 ipseclog((LOG_DEBUG, 3351 "key_setsaval: unable to initialize SA type %u.\n", 3352 mhp->msg->sadb_msg_satype)); 3353 goto fail; 3354 } 3355 3356 /* reset created */ 3357 sav->created = time_second; 3358 3359 /* make lifetime for CURRENT */ 3360 KMALLOC(sav->lft_c, struct sadb_lifetime *, 3361 sizeof(struct sadb_lifetime)); 3362 if (sav->lft_c == NULL) { 3363 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3364 error = ENOBUFS; 3365 goto fail; 3366 } 3367 3368 sav->lft_c->sadb_lifetime_len = 3369 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3370 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3371 sav->lft_c->sadb_lifetime_allocations = 0; 3372 sav->lft_c->sadb_lifetime_bytes = 0; 3373 sav->lft_c->sadb_lifetime_addtime = time_second; 3374 sav->lft_c->sadb_lifetime_usetime = 0; 3375 3376 /* lifetimes for HARD and SOFT */ 3377 { 3378 const struct sadb_lifetime *lft0; 3379 3380 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3381 if (lft0 != NULL) { 3382 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3383 error = EINVAL; 3384 goto fail; 3385 } 3386 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, 3387 sizeof(*lft0)); 3388 if (sav->lft_h == NULL) { 3389 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3390 error = ENOBUFS; 3391 goto fail; 3392 } 3393 /* to be initialize ? */ 3394 } 3395 3396 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3397 if (lft0 != NULL) { 3398 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3399 error = EINVAL; 3400 goto fail; 3401 } 3402 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0, 3403 sizeof(*lft0)); 3404 if (sav->lft_s == NULL) { 3405 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n")); 3406 error = ENOBUFS; 3407 goto fail; 3408 } 3409 /* to be initialize ? */ 3410 } 3411 } 3412 3413 return 0; 3414 3415 fail: 3416 /* initialization */ 3417 if (sav->replay != NULL) { 3418 KFREE(sav->replay); 3419 sav->replay = NULL; 3420 } 3421 if (sav->key_auth != NULL) { 3422 KFREE(sav->key_auth); 3423 sav->key_auth = NULL; 3424 } 3425 if (sav->key_enc != NULL) { 3426 KFREE(sav->key_enc); 3427 sav->key_enc = NULL; 3428 } 3429 if (sav->sched) { 3430 KFREE(sav->sched); 3431 sav->sched = NULL; 3432 } 3433 if (sav->iv != NULL) { 3434 KFREE(sav->iv); 3435 sav->iv = NULL; 3436 } 3437 if (sav->lft_c != NULL) { 3438 KFREE(sav->lft_c); 3439 sav->lft_c = NULL; 3440 } 3441 if (sav->lft_h != NULL) { 3442 KFREE(sav->lft_h); 3443 sav->lft_h = NULL; 3444 } 3445 if (sav->lft_s != NULL) { 3446 KFREE(sav->lft_s); 3447 sav->lft_s = NULL; 3448 } 3449 3450 return error; 3451 } 3452 3453 /* 3454 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3455 * OUT: 0: valid 3456 * other: errno 3457 */ 3458 static int 3459 key_mature(sav) 3460 struct secasvar *sav; 3461 { 3462 int error; 3463 3464 /* check SPI value */ 3465 switch (sav->sah->saidx.proto) { 3466 case IPPROTO_ESP: 3467 case IPPROTO_AH: 3468 if (ntohl(sav->spi) <= 255) { 3469 ipseclog((LOG_DEBUG, 3470 "key_mature: illegal range of SPI %u.\n", 3471 (u_int32_t)ntohl(sav->spi))); 3472 return EINVAL; 3473 } 3474 break; 3475 } 3476 3477 /* check satype */ 3478 switch (sav->sah->saidx.proto) { 3479 case IPPROTO_ESP: 3480 /* check flags */ 3481 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3482 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3483 ipseclog((LOG_DEBUG, "key_mature: " 3484 "invalid flag (derived) given to old-esp.\n")); 3485 return EINVAL; 3486 } 3487 error = xform_init(sav, XF_ESP); 3488 break; 3489 case IPPROTO_AH: 3490 /* check flags */ 3491 if (sav->flags & SADB_X_EXT_DERIV) { 3492 ipseclog((LOG_DEBUG, "key_mature: " 3493 "invalid flag (derived) given to AH SA.\n")); 3494 return EINVAL; 3495 } 3496 if (sav->alg_enc != SADB_EALG_NONE) { 3497 ipseclog((LOG_DEBUG, "key_mature: " 3498 "protocol and algorithm mismated.\n")); 3499 return(EINVAL); 3500 } 3501 error = xform_init(sav, XF_AH); 3502 break; 3503 case IPPROTO_IPCOMP: 3504 if (sav->alg_auth != SADB_AALG_NONE) { 3505 ipseclog((LOG_DEBUG, "key_mature: " 3506 "protocol and algorithm mismated.\n")); 3507 return(EINVAL); 3508 } 3509 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3510 && ntohl(sav->spi) >= 0x10000) { 3511 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n")); 3512 return(EINVAL); 3513 } 3514 error = xform_init(sav, XF_IPCOMP); 3515 break; 3516 case IPPROTO_TCP: 3517 if (sav->alg_enc != SADB_EALG_NONE) { 3518 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3519 "mismated.\n", __func__)); 3520 return(EINVAL); 3521 } 3522 error = xform_init(sav, XF_TCPSIGNATURE); 3523 break; 3524 default: 3525 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n")); 3526 error = EPROTONOSUPPORT; 3527 break; 3528 } 3529 if (error == 0) 3530 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3531 return (error); 3532 } 3533 3534 /* 3535 * subroutine for SADB_GET and SADB_DUMP. 3536 */ 3537 static struct mbuf * 3538 key_setdumpsa(sav, type, satype, seq, pid) 3539 struct secasvar *sav; 3540 u_int8_t type, satype; 3541 u_int32_t seq, pid; 3542 { 3543 struct mbuf *result = NULL, *tres = NULL, *m; 3544 int l = 0; 3545 int i; 3546 void *p; 3547 int dumporder[] = { 3548 SADB_EXT_SA, SADB_X_EXT_SA2, 3549 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3550 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3551 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3552 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3553 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3554 #ifdef IPSEC_NAT_T 3555 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 3556 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OA, 3557 SADB_X_EXT_NAT_T_FRAG, 3558 #endif 3559 3560 }; 3561 3562 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3563 if (m == NULL) 3564 goto fail; 3565 result = m; 3566 3567 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3568 m = NULL; 3569 p = NULL; 3570 switch (dumporder[i]) { 3571 case SADB_EXT_SA: 3572 m = key_setsadbsa(sav); 3573 if (!m) 3574 goto fail; 3575 break; 3576 3577 case SADB_X_EXT_SA2: 3578 m = key_setsadbxsa2(sav->sah->saidx.mode, 3579 sav->replay ? sav->replay->count : 0, 3580 sav->sah->saidx.reqid); 3581 if (!m) 3582 goto fail; 3583 break; 3584 3585 case SADB_EXT_ADDRESS_SRC: 3586 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3587 &sav->sah->saidx.src.sa, 3588 FULLMASK, IPSEC_ULPROTO_ANY); 3589 if (!m) 3590 goto fail; 3591 break; 3592 3593 case SADB_EXT_ADDRESS_DST: 3594 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3595 &sav->sah->saidx.dst.sa, 3596 FULLMASK, IPSEC_ULPROTO_ANY); 3597 if (!m) 3598 goto fail; 3599 break; 3600 3601 case SADB_EXT_KEY_AUTH: 3602 if (!sav->key_auth) 3603 continue; 3604 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3605 p = sav->key_auth; 3606 break; 3607 3608 case SADB_EXT_KEY_ENCRYPT: 3609 if (!sav->key_enc) 3610 continue; 3611 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3612 p = sav->key_enc; 3613 break; 3614 3615 case SADB_EXT_LIFETIME_CURRENT: 3616 if (!sav->lft_c) 3617 continue; 3618 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3619 p = sav->lft_c; 3620 break; 3621 3622 case SADB_EXT_LIFETIME_HARD: 3623 if (!sav->lft_h) 3624 continue; 3625 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3626 p = sav->lft_h; 3627 break; 3628 3629 case SADB_EXT_LIFETIME_SOFT: 3630 if (!sav->lft_s) 3631 continue; 3632 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3633 p = sav->lft_s; 3634 break; 3635 3636 #ifdef IPSEC_NAT_T 3637 case SADB_X_EXT_NAT_T_TYPE: 3638 if ((m = key_setsadbxtype(sav->natt_type)) == NULL) 3639 goto fail; 3640 break; 3641 3642 case SADB_X_EXT_NAT_T_DPORT: 3643 if ((m = key_setsadbxport( 3644 key_portfromsaddr(&sav->sah->saidx.dst), 3645 SADB_X_EXT_NAT_T_DPORT)) == NULL) 3646 goto fail; 3647 break; 3648 3649 case SADB_X_EXT_NAT_T_SPORT: 3650 if ((m = key_setsadbxport( 3651 key_portfromsaddr(&sav->sah->saidx.src), 3652 SADB_X_EXT_NAT_T_SPORT)) == NULL) 3653 goto fail; 3654 break; 3655 3656 case SADB_X_EXT_NAT_T_OA: 3657 case SADB_X_EXT_NAT_T_FRAG: 3658 continue; 3659 #endif 3660 3661 case SADB_EXT_ADDRESS_PROXY: 3662 case SADB_EXT_IDENTITY_SRC: 3663 case SADB_EXT_IDENTITY_DST: 3664 /* XXX: should we brought from SPD ? */ 3665 case SADB_EXT_SENSITIVITY: 3666 default: 3667 continue; 3668 } 3669 3670 if ((!m && !p) || (m && p)) 3671 goto fail; 3672 if (p && tres) { 3673 M_PREPEND(tres, l, M_DONTWAIT); 3674 if (!tres) 3675 goto fail; 3676 bcopy(p, mtod(tres, void *), l); 3677 continue; 3678 } 3679 if (p) { 3680 m = key_alloc_mbuf(l); 3681 if (!m) 3682 goto fail; 3683 m_copyback(m, 0, l, p); 3684 } 3685 3686 if (tres) 3687 m_cat(m, tres); 3688 tres = m; 3689 } 3690 3691 m_cat(result, tres); 3692 3693 if (result->m_len < sizeof(struct sadb_msg)) { 3694 result = m_pullup(result, sizeof(struct sadb_msg)); 3695 if (result == NULL) 3696 goto fail; 3697 } 3698 3699 result->m_pkthdr.len = 0; 3700 for (m = result; m; m = m->m_next) 3701 result->m_pkthdr.len += m->m_len; 3702 3703 mtod(result, struct sadb_msg *)->sadb_msg_len = 3704 PFKEY_UNIT64(result->m_pkthdr.len); 3705 3706 return result; 3707 3708 fail: 3709 m_freem(result); 3710 m_freem(tres); 3711 return NULL; 3712 } 3713 3714 3715 #ifdef IPSEC_NAT_T 3716 /* 3717 * set a type in sadb_x_nat_t_type 3718 */ 3719 static struct mbuf * 3720 key_setsadbxtype(type) 3721 u_int16_t type; 3722 { 3723 struct mbuf *m; 3724 size_t len; 3725 struct sadb_x_nat_t_type *p; 3726 3727 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3728 3729 m = key_alloc_mbuf(len); 3730 if (!m || m->m_next) { /*XXX*/ 3731 if (m) 3732 m_freem(m); 3733 return NULL; 3734 } 3735 3736 p = mtod(m, struct sadb_x_nat_t_type *); 3737 3738 bzero(p, len); 3739 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3740 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3741 p->sadb_x_nat_t_type_type = type; 3742 3743 return m; 3744 } 3745 /* 3746 * set a port in sadb_x_nat_t_port. port is in network order 3747 */ 3748 static struct mbuf * 3749 key_setsadbxport(port, type) 3750 u_int16_t port; 3751 u_int16_t type; 3752 { 3753 struct mbuf *m; 3754 size_t len; 3755 struct sadb_x_nat_t_port *p; 3756 3757 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3758 3759 m = key_alloc_mbuf(len); 3760 if (!m || m->m_next) { /*XXX*/ 3761 if (m) 3762 m_freem(m); 3763 return NULL; 3764 } 3765 3766 p = mtod(m, struct sadb_x_nat_t_port *); 3767 3768 bzero(p, len); 3769 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3770 p->sadb_x_nat_t_port_exttype = type; 3771 p->sadb_x_nat_t_port_port = port; 3772 3773 return m; 3774 } 3775 3776 /* 3777 * Get port from sockaddr, port is in network order 3778 */ 3779 u_int16_t 3780 key_portfromsaddr(saddr) 3781 const union sockaddr_union *saddr; 3782 { 3783 u_int16_t port; 3784 3785 switch (saddr->sa.sa_family) { 3786 case AF_INET: { 3787 port = saddr->sin.sin_port; 3788 break; 3789 } 3790 #ifdef INET6 3791 case AF_INET6: { 3792 port = saddr->sin6.sin6_port; 3793 break; 3794 } 3795 #endif 3796 default: 3797 printf("key_portfromsaddr: unexpected address family\n"); 3798 port = 0; 3799 break; 3800 } 3801 3802 return port; 3803 } 3804 3805 #endif /* IPSEC_NAT_T */ 3806 3807 /* 3808 * Set port is struct sockaddr. port is in network order 3809 */ 3810 static void 3811 key_porttosaddr(saddr, port) 3812 union sockaddr_union *saddr; 3813 u_int16_t port; 3814 { 3815 switch (saddr->sa.sa_family) { 3816 case AF_INET: { 3817 saddr->sin.sin_port = port; 3818 break; 3819 } 3820 #ifdef INET6 3821 case AF_INET6: { 3822 saddr->sin6.sin6_port = port; 3823 break; 3824 } 3825 #endif 3826 default: 3827 printf("key_porttosaddr: unexpected address family %d\n", 3828 saddr->sa.sa_family); 3829 break; 3830 } 3831 3832 return; 3833 } 3834 3835 /* 3836 * Safety check sa_len 3837 */ 3838 static int 3839 key_checksalen(saddr) 3840 const union sockaddr_union *saddr; 3841 { 3842 switch (saddr->sa.sa_family) { 3843 case AF_INET: 3844 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3845 return -1; 3846 break; 3847 #ifdef INET6 3848 case AF_INET6: 3849 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3850 return -1; 3851 break; 3852 #endif 3853 default: 3854 printf("key_checksalen: unexpected sa_family %d\n", 3855 saddr->sa.sa_family); 3856 return -1; 3857 break; 3858 } 3859 return 0; 3860 } 3861 3862 3863 /* 3864 * set data into sadb_msg. 3865 */ 3866 static struct mbuf * 3867 key_setsadbmsg(type, tlen, satype, seq, pid, reserved) 3868 u_int8_t type, satype; 3869 u_int16_t tlen; 3870 u_int32_t seq; 3871 pid_t pid; 3872 u_int16_t reserved; 3873 { 3874 struct mbuf *m; 3875 struct sadb_msg *p; 3876 int len; 3877 3878 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3879 if (len > MCLBYTES) 3880 return NULL; 3881 MGETHDR(m, M_DONTWAIT, MT_DATA); 3882 if (m && len > MHLEN) { 3883 MCLGET(m, M_DONTWAIT); 3884 if ((m->m_flags & M_EXT) == 0) { 3885 m_freem(m); 3886 m = NULL; 3887 } 3888 } 3889 if (!m) 3890 return NULL; 3891 m->m_pkthdr.len = m->m_len = len; 3892 m->m_next = NULL; 3893 3894 p = mtod(m, struct sadb_msg *); 3895 3896 bzero(p, len); 3897 p->sadb_msg_version = PF_KEY_V2; 3898 p->sadb_msg_type = type; 3899 p->sadb_msg_errno = 0; 3900 p->sadb_msg_satype = satype; 3901 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3902 p->sadb_msg_reserved = reserved; 3903 p->sadb_msg_seq = seq; 3904 p->sadb_msg_pid = (u_int32_t)pid; 3905 3906 return m; 3907 } 3908 3909 /* 3910 * copy secasvar data into sadb_address. 3911 */ 3912 static struct mbuf * 3913 key_setsadbsa(sav) 3914 struct secasvar *sav; 3915 { 3916 struct mbuf *m; 3917 struct sadb_sa *p; 3918 int len; 3919 3920 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3921 m = key_alloc_mbuf(len); 3922 if (!m || m->m_next) { /*XXX*/ 3923 if (m) 3924 m_freem(m); 3925 return NULL; 3926 } 3927 3928 p = mtod(m, struct sadb_sa *); 3929 3930 bzero(p, len); 3931 p->sadb_sa_len = PFKEY_UNIT64(len); 3932 p->sadb_sa_exttype = SADB_EXT_SA; 3933 p->sadb_sa_spi = sav->spi; 3934 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3935 p->sadb_sa_state = sav->state; 3936 p->sadb_sa_auth = sav->alg_auth; 3937 p->sadb_sa_encrypt = sav->alg_enc; 3938 p->sadb_sa_flags = sav->flags; 3939 3940 return m; 3941 } 3942 3943 /* 3944 * set data into sadb_address. 3945 */ 3946 static struct mbuf * 3947 key_setsadbaddr(exttype, saddr, prefixlen, ul_proto) 3948 u_int16_t exttype; 3949 const struct sockaddr *saddr; 3950 u_int8_t prefixlen; 3951 u_int16_t ul_proto; 3952 { 3953 struct mbuf *m; 3954 struct sadb_address *p; 3955 size_t len; 3956 3957 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3958 PFKEY_ALIGN8(saddr->sa_len); 3959 m = key_alloc_mbuf(len); 3960 if (!m || m->m_next) { /*XXX*/ 3961 if (m) 3962 m_freem(m); 3963 return NULL; 3964 } 3965 3966 p = mtod(m, struct sadb_address *); 3967 3968 bzero(p, len); 3969 p->sadb_address_len = PFKEY_UNIT64(len); 3970 p->sadb_address_exttype = exttype; 3971 p->sadb_address_proto = ul_proto; 3972 if (prefixlen == FULLMASK) { 3973 switch (saddr->sa_family) { 3974 case AF_INET: 3975 prefixlen = sizeof(struct in_addr) << 3; 3976 break; 3977 case AF_INET6: 3978 prefixlen = sizeof(struct in6_addr) << 3; 3979 break; 3980 default: 3981 ; /*XXX*/ 3982 } 3983 } 3984 p->sadb_address_prefixlen = prefixlen; 3985 p->sadb_address_reserved = 0; 3986 3987 bcopy(saddr, 3988 mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3989 saddr->sa_len); 3990 3991 return m; 3992 } 3993 3994 #if 0 3995 /* 3996 * set data into sadb_ident. 3997 */ 3998 static struct mbuf * 3999 key_setsadbident(exttype, idtype, string, stringlen, id) 4000 u_int16_t exttype, idtype; 4001 void *string; 4002 int stringlen; 4003 u_int64_t id; 4004 { 4005 struct mbuf *m; 4006 struct sadb_ident *p; 4007 size_t len; 4008 4009 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 4010 m = key_alloc_mbuf(len); 4011 if (!m || m->m_next) { /*XXX*/ 4012 if (m) 4013 m_freem(m); 4014 return NULL; 4015 } 4016 4017 p = mtod(m, struct sadb_ident *); 4018 4019 bzero(p, len); 4020 p->sadb_ident_len = PFKEY_UNIT64(len); 4021 p->sadb_ident_exttype = exttype; 4022 p->sadb_ident_type = idtype; 4023 p->sadb_ident_reserved = 0; 4024 p->sadb_ident_id = id; 4025 4026 bcopy(string, 4027 mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 4028 stringlen); 4029 4030 return m; 4031 } 4032 #endif 4033 4034 /* 4035 * set data into sadb_x_sa2. 4036 */ 4037 static struct mbuf * 4038 key_setsadbxsa2(mode, seq, reqid) 4039 u_int8_t mode; 4040 u_int32_t seq; 4041 u_int16_t reqid; 4042 { 4043 struct mbuf *m; 4044 struct sadb_x_sa2 *p; 4045 size_t len; 4046 4047 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4048 m = key_alloc_mbuf(len); 4049 if (!m || m->m_next) { /*XXX*/ 4050 if (m) 4051 m_freem(m); 4052 return NULL; 4053 } 4054 4055 p = mtod(m, struct sadb_x_sa2 *); 4056 4057 bzero(p, len); 4058 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4059 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4060 p->sadb_x_sa2_mode = mode; 4061 p->sadb_x_sa2_reserved1 = 0; 4062 p->sadb_x_sa2_reserved2 = 0; 4063 p->sadb_x_sa2_sequence = seq; 4064 p->sadb_x_sa2_reqid = reqid; 4065 4066 return m; 4067 } 4068 4069 /* 4070 * set data into sadb_x_policy 4071 */ 4072 static struct mbuf * 4073 key_setsadbxpolicy(type, dir, id) 4074 u_int16_t type; 4075 u_int8_t dir; 4076 u_int32_t id; 4077 { 4078 struct mbuf *m; 4079 struct sadb_x_policy *p; 4080 size_t len; 4081 4082 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4083 m = key_alloc_mbuf(len); 4084 if (!m || m->m_next) { /*XXX*/ 4085 if (m) 4086 m_freem(m); 4087 return NULL; 4088 } 4089 4090 p = mtod(m, struct sadb_x_policy *); 4091 4092 bzero(p, len); 4093 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4094 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4095 p->sadb_x_policy_type = type; 4096 p->sadb_x_policy_dir = dir; 4097 p->sadb_x_policy_id = id; 4098 4099 return m; 4100 } 4101 4102 /* %%% utilities */ 4103 /* 4104 * copy a buffer into the new buffer allocated. 4105 */ 4106 static void * 4107 key_newbuf(src, len) 4108 const void *src; 4109 u_int len; 4110 { 4111 void *new; 4112 4113 KMALLOC(new, void *, len); 4114 if (new == NULL) { 4115 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n")); 4116 return NULL; 4117 } 4118 bcopy(src, new, len); 4119 4120 return new; 4121 } 4122 4123 /* compare my own address 4124 * OUT: 1: true, i.e. my address. 4125 * 0: false 4126 */ 4127 int 4128 key_ismyaddr(sa) 4129 struct sockaddr *sa; 4130 { 4131 #ifdef INET 4132 struct sockaddr_in *sin; 4133 struct in_ifaddr *ia; 4134 #endif 4135 4136 /* sanity check */ 4137 if (sa == NULL) 4138 panic("key_ismyaddr: NULL pointer is passed"); 4139 4140 switch (sa->sa_family) { 4141 #ifdef INET 4142 case AF_INET: 4143 sin = (struct sockaddr_in *)sa; 4144 for (ia = in_ifaddrhead.tqh_first; ia; 4145 ia = ia->ia_link.tqe_next) 4146 { 4147 if (sin->sin_family == ia->ia_addr.sin_family && 4148 sin->sin_len == ia->ia_addr.sin_len && 4149 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4150 { 4151 return 1; 4152 } 4153 } 4154 break; 4155 #endif 4156 #ifdef INET6 4157 case AF_INET6: 4158 return key_ismyaddr6((struct sockaddr_in6 *)sa); 4159 #endif 4160 } 4161 4162 return 0; 4163 } 4164 4165 #ifdef INET6 4166 /* 4167 * compare my own address for IPv6. 4168 * 1: ours 4169 * 0: other 4170 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4171 */ 4172 #include <netinet6/in6_var.h> 4173 4174 static int 4175 key_ismyaddr6(sin6) 4176 struct sockaddr_in6 *sin6; 4177 { 4178 struct in6_ifaddr *ia; 4179 struct in6_multi *in6m; 4180 4181 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 4182 if (key_sockaddrcmp((struct sockaddr *)&sin6, 4183 (struct sockaddr *)&ia->ia_addr, 0) == 0) 4184 return 1; 4185 4186 /* 4187 * XXX Multicast 4188 * XXX why do we care about multlicast here while we don't care 4189 * about IPv4 multicast?? 4190 * XXX scope 4191 */ 4192 in6m = NULL; 4193 #ifdef __FreeBSD__ 4194 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 4195 #else 4196 for ((in6m) = ia->ia6_multiaddrs.lh_first; 4197 (in6m) != NULL && 4198 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr); 4199 (in6m) = in6m->in6m_entry.le_next) 4200 continue; 4201 #endif 4202 if (in6m) 4203 return 1; 4204 } 4205 4206 /* loopback, just for safety */ 4207 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4208 return 1; 4209 4210 return 0; 4211 } 4212 #endif /*INET6*/ 4213 4214 /* 4215 * compare two secasindex structure. 4216 * flag can specify to compare 2 saidxes. 4217 * compare two secasindex structure without both mode and reqid. 4218 * don't compare port. 4219 * IN: 4220 * saidx0: source, it can be in SAD. 4221 * saidx1: object. 4222 * OUT: 4223 * 1 : equal 4224 * 0 : not equal 4225 */ 4226 static int 4227 key_cmpsaidx( 4228 const struct secasindex *saidx0, 4229 const struct secasindex *saidx1, 4230 int flag) 4231 { 4232 int chkport = 0; 4233 4234 /* sanity */ 4235 if (saidx0 == NULL && saidx1 == NULL) 4236 return 1; 4237 4238 if (saidx0 == NULL || saidx1 == NULL) 4239 return 0; 4240 4241 if (saidx0->proto != saidx1->proto) 4242 return 0; 4243 4244 if (flag == CMP_EXACTLY) { 4245 if (saidx0->mode != saidx1->mode) 4246 return 0; 4247 if (saidx0->reqid != saidx1->reqid) 4248 return 0; 4249 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4250 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4251 return 0; 4252 } else { 4253 4254 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4255 if (flag == CMP_MODE_REQID 4256 ||flag == CMP_REQID) { 4257 /* 4258 * If reqid of SPD is non-zero, unique SA is required. 4259 * The result must be of same reqid in this case. 4260 */ 4261 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4262 return 0; 4263 } 4264 4265 if (flag == CMP_MODE_REQID) { 4266 if (saidx0->mode != IPSEC_MODE_ANY 4267 && saidx0->mode != saidx1->mode) 4268 return 0; 4269 } 4270 4271 /* 4272 * If NAT-T is enabled, check ports for tunnel mode. 4273 * Don't do it for transport mode, as there is no 4274 * port information available in the SP. 4275 */ 4276 #ifdef IPSEC_NAT_T 4277 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4278 chkport = 1; 4279 #endif 4280 4281 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4282 return 0; 4283 } 4284 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4285 return 0; 4286 } 4287 } 4288 4289 return 1; 4290 } 4291 4292 /* 4293 * compare two secindex structure exactly. 4294 * IN: 4295 * spidx0: source, it is often in SPD. 4296 * spidx1: object, it is often from PFKEY message. 4297 * OUT: 4298 * 1 : equal 4299 * 0 : not equal 4300 */ 4301 int 4302 key_cmpspidx_exactly( 4303 struct secpolicyindex *spidx0, 4304 struct secpolicyindex *spidx1) 4305 { 4306 /* sanity */ 4307 if (spidx0 == NULL && spidx1 == NULL) 4308 return 1; 4309 4310 if (spidx0 == NULL || spidx1 == NULL) 4311 return 0; 4312 4313 if (spidx0->prefs != spidx1->prefs 4314 || spidx0->prefd != spidx1->prefd 4315 || spidx0->ul_proto != spidx1->ul_proto) 4316 return 0; 4317 4318 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4319 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4320 } 4321 4322 /* 4323 * compare two secindex structure with mask. 4324 * IN: 4325 * spidx0: source, it is often in SPD. 4326 * spidx1: object, it is often from IP header. 4327 * OUT: 4328 * 1 : equal 4329 * 0 : not equal 4330 */ 4331 int 4332 key_cmpspidx_withmask( 4333 struct secpolicyindex *spidx0, 4334 struct secpolicyindex *spidx1) 4335 { 4336 /* sanity */ 4337 if (spidx0 == NULL && spidx1 == NULL) 4338 return 1; 4339 4340 if (spidx0 == NULL || spidx1 == NULL) 4341 return 0; 4342 4343 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4344 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4345 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4346 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4347 return 0; 4348 4349 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4350 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4351 && spidx0->ul_proto != spidx1->ul_proto) 4352 return 0; 4353 4354 switch (spidx0->src.sa.sa_family) { 4355 case AF_INET: 4356 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4357 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4358 return 0; 4359 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4360 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4361 return 0; 4362 break; 4363 case AF_INET6: 4364 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4365 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4366 return 0; 4367 /* 4368 * scope_id check. if sin6_scope_id is 0, we regard it 4369 * as a wildcard scope, which matches any scope zone ID. 4370 */ 4371 if (spidx0->src.sin6.sin6_scope_id && 4372 spidx1->src.sin6.sin6_scope_id && 4373 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4374 return 0; 4375 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4376 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4377 return 0; 4378 break; 4379 default: 4380 /* XXX */ 4381 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4382 return 0; 4383 break; 4384 } 4385 4386 switch (spidx0->dst.sa.sa_family) { 4387 case AF_INET: 4388 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4389 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4390 return 0; 4391 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4392 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4393 return 0; 4394 break; 4395 case AF_INET6: 4396 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4397 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4398 return 0; 4399 /* 4400 * scope_id check. if sin6_scope_id is 0, we regard it 4401 * as a wildcard scope, which matches any scope zone ID. 4402 */ 4403 if (spidx0->src.sin6.sin6_scope_id && 4404 spidx1->src.sin6.sin6_scope_id && 4405 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4406 return 0; 4407 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4408 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4409 return 0; 4410 break; 4411 default: 4412 /* XXX */ 4413 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4414 return 0; 4415 break; 4416 } 4417 4418 /* XXX Do we check other field ? e.g. flowinfo */ 4419 4420 return 1; 4421 } 4422 4423 /* returns 0 on match */ 4424 static int 4425 key_sockaddrcmp( 4426 const struct sockaddr *sa1, 4427 const struct sockaddr *sa2, 4428 int port) 4429 { 4430 #ifdef satosin 4431 #undef satosin 4432 #endif 4433 #define satosin(s) ((const struct sockaddr_in *)s) 4434 #ifdef satosin6 4435 #undef satosin6 4436 #endif 4437 #define satosin6(s) ((const struct sockaddr_in6 *)s) 4438 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4439 return 1; 4440 4441 switch (sa1->sa_family) { 4442 case AF_INET: 4443 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4444 return 1; 4445 if (satosin(sa1)->sin_addr.s_addr != 4446 satosin(sa2)->sin_addr.s_addr) { 4447 return 1; 4448 } 4449 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4450 return 1; 4451 break; 4452 case AF_INET6: 4453 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4454 return 1; /*EINVAL*/ 4455 if (satosin6(sa1)->sin6_scope_id != 4456 satosin6(sa2)->sin6_scope_id) { 4457 return 1; 4458 } 4459 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4460 &satosin6(sa2)->sin6_addr)) { 4461 return 1; 4462 } 4463 if (port && 4464 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4465 return 1; 4466 } 4467 break; 4468 default: 4469 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4470 return 1; 4471 break; 4472 } 4473 4474 return 0; 4475 #undef satosin 4476 #undef satosin6 4477 } 4478 4479 /* 4480 * compare two buffers with mask. 4481 * IN: 4482 * addr1: source 4483 * addr2: object 4484 * bits: Number of bits to compare 4485 * OUT: 4486 * 1 : equal 4487 * 0 : not equal 4488 */ 4489 static int 4490 key_bbcmp(const void *a1, const void *a2, u_int bits) 4491 { 4492 const unsigned char *p1 = a1; 4493 const unsigned char *p2 = a2; 4494 4495 /* XXX: This could be considerably faster if we compare a word 4496 * at a time, but it is complicated on LSB Endian machines */ 4497 4498 /* Handle null pointers */ 4499 if (p1 == NULL || p2 == NULL) 4500 return (p1 == p2); 4501 4502 while (bits >= 8) { 4503 if (*p1++ != *p2++) 4504 return 0; 4505 bits -= 8; 4506 } 4507 4508 if (bits > 0) { 4509 u_int8_t mask = ~((1<<(8-bits))-1); 4510 if ((*p1 & mask) != (*p2 & mask)) 4511 return 0; 4512 } 4513 return 1; /* Match! */ 4514 } 4515 4516 /* 4517 * time handler. 4518 * scanning SPD and SAD to check status for each entries, 4519 * and do to remove or to expire. 4520 * XXX: year 2038 problem may remain. 4521 */ 4522 void 4523 key_timehandler(void* arg) 4524 { 4525 u_int dir; 4526 int s; 4527 time_t now = time_second; 4528 4529 s = splsoftnet(); /*called from softclock()*/ 4530 4531 /* SPD */ 4532 { 4533 struct secpolicy *sp, *nextsp; 4534 4535 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4536 for (sp = LIST_FIRST(&sptree[dir]); 4537 sp != NULL; 4538 sp = nextsp) { 4539 4540 nextsp = LIST_NEXT(sp, chain); 4541 4542 if (sp->state == IPSEC_SPSTATE_DEAD) { 4543 key_sp_unlink(sp); /*XXX*/ 4544 4545 /* 'sp' dead; continue transfers to 4546 * 'sp = nextsp' 4547 */ 4548 continue; 4549 } 4550 4551 if (sp->lifetime == 0 && sp->validtime == 0) 4552 continue; 4553 4554 /* the deletion will occur next time */ 4555 if ((sp->lifetime && now - sp->created > sp->lifetime) 4556 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4557 key_sp_dead(sp); 4558 key_spdexpire(sp); 4559 continue; 4560 } 4561 } 4562 } 4563 } 4564 4565 /* SAD */ 4566 { 4567 struct secashead *sah, *nextsah; 4568 struct secasvar *sav, *nextsav; 4569 4570 for (sah = LIST_FIRST(&sahtree); 4571 sah != NULL; 4572 sah = nextsah) { 4573 4574 nextsah = LIST_NEXT(sah, chain); 4575 4576 /* if sah has been dead, then delete it and process next sah. */ 4577 if (sah->state == SADB_SASTATE_DEAD) { 4578 key_delsah(sah); 4579 continue; 4580 } 4581 4582 /* if LARVAL entry doesn't become MATURE, delete it. */ 4583 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]); 4584 sav != NULL; 4585 sav = nextsav) { 4586 4587 nextsav = LIST_NEXT(sav, chain); 4588 4589 if (now - sav->created > key_larval_lifetime) { 4590 KEY_FREESAV(&sav); 4591 } 4592 } 4593 4594 /* 4595 * check MATURE entry to start to send expire message 4596 * whether or not. 4597 */ 4598 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); 4599 sav != NULL; 4600 sav = nextsav) { 4601 4602 nextsav = LIST_NEXT(sav, chain); 4603 4604 /* we don't need to check. */ 4605 if (sav->lft_s == NULL) 4606 continue; 4607 4608 /* sanity check */ 4609 if (sav->lft_c == NULL) { 4610 ipseclog((LOG_DEBUG,"key_timehandler: " 4611 "There is no CURRENT time, why?\n")); 4612 continue; 4613 } 4614 4615 /* check SOFT lifetime */ 4616 if (sav->lft_s->sadb_lifetime_addtime != 0 4617 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4618 /* 4619 * check SA to be used whether or not. 4620 * when SA hasn't been used, delete it. 4621 */ 4622 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4623 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4624 KEY_FREESAV(&sav); 4625 } else { 4626 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4627 /* 4628 * XXX If we keep to send expire 4629 * message in the status of 4630 * DYING. Do remove below code. 4631 */ 4632 key_expire(sav); 4633 } 4634 } 4635 /* check SOFT lifetime by bytes */ 4636 /* 4637 * XXX I don't know the way to delete this SA 4638 * when new SA is installed. Caution when it's 4639 * installed too big lifetime by time. 4640 */ 4641 else if (sav->lft_s->sadb_lifetime_bytes != 0 4642 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4643 4644 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4645 /* 4646 * XXX If we keep to send expire 4647 * message in the status of 4648 * DYING. Do remove below code. 4649 */ 4650 key_expire(sav); 4651 } 4652 } 4653 4654 /* check DYING entry to change status to DEAD. */ 4655 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]); 4656 sav != NULL; 4657 sav = nextsav) { 4658 4659 nextsav = LIST_NEXT(sav, chain); 4660 4661 /* we don't need to check. */ 4662 if (sav->lft_h == NULL) 4663 continue; 4664 4665 /* sanity check */ 4666 if (sav->lft_c == NULL) { 4667 ipseclog((LOG_DEBUG, "key_timehandler: " 4668 "There is no CURRENT time, why?\n")); 4669 continue; 4670 } 4671 4672 if (sav->lft_h->sadb_lifetime_addtime != 0 4673 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4674 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4675 KEY_FREESAV(&sav); 4676 } 4677 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4678 else if (sav->lft_s != NULL 4679 && sav->lft_s->sadb_lifetime_addtime != 0 4680 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4681 /* 4682 * XXX: should be checked to be 4683 * installed the valid SA. 4684 */ 4685 4686 /* 4687 * If there is no SA then sending 4688 * expire message. 4689 */ 4690 key_expire(sav); 4691 } 4692 #endif 4693 /* check HARD lifetime by bytes */ 4694 else if (sav->lft_h->sadb_lifetime_bytes != 0 4695 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4696 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4697 KEY_FREESAV(&sav); 4698 } 4699 } 4700 4701 /* delete entry in DEAD */ 4702 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]); 4703 sav != NULL; 4704 sav = nextsav) { 4705 4706 nextsav = LIST_NEXT(sav, chain); 4707 4708 /* sanity check */ 4709 if (sav->state != SADB_SASTATE_DEAD) { 4710 ipseclog((LOG_DEBUG, "key_timehandler: " 4711 "invalid sav->state " 4712 "(queue: %d SA: %d): " 4713 "kill it anyway\n", 4714 SADB_SASTATE_DEAD, sav->state)); 4715 } 4716 4717 /* 4718 * do not call key_freesav() here. 4719 * sav should already be freed, and sav->refcnt 4720 * shows other references to sav 4721 * (such as from SPD). 4722 */ 4723 } 4724 } 4725 } 4726 4727 #ifndef IPSEC_NONBLOCK_ACQUIRE 4728 /* ACQ tree */ 4729 { 4730 struct secacq *acq, *nextacq; 4731 4732 for (acq = LIST_FIRST(&acqtree); 4733 acq != NULL; 4734 acq = nextacq) { 4735 4736 nextacq = LIST_NEXT(acq, chain); 4737 4738 if (now - acq->created > key_blockacq_lifetime 4739 && __LIST_CHAINED(acq)) { 4740 LIST_REMOVE(acq, chain); 4741 KFREE(acq); 4742 } 4743 } 4744 } 4745 #endif 4746 4747 /* SP ACQ tree */ 4748 { 4749 struct secspacq *acq, *nextacq; 4750 4751 for (acq = LIST_FIRST(&spacqtree); 4752 acq != NULL; 4753 acq = nextacq) { 4754 4755 nextacq = LIST_NEXT(acq, chain); 4756 4757 if (now - acq->created > key_blockacq_lifetime 4758 && __LIST_CHAINED(acq)) { 4759 LIST_REMOVE(acq, chain); 4760 KFREE(acq); 4761 } 4762 } 4763 } 4764 4765 /* initialize random seed */ 4766 if (key_tick_init_random++ > key_int_random) { 4767 key_tick_init_random = 0; 4768 key_srandom(); 4769 } 4770 4771 #ifndef IPSEC_DEBUG2 4772 /* do exchange to tick time !! */ 4773 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4774 #endif /* IPSEC_DEBUG2 */ 4775 4776 splx(s); 4777 return; 4778 } 4779 4780 #ifdef __NetBSD__ 4781 void srandom(int); 4782 void srandom(int arg) {return;} 4783 #endif 4784 4785 /* 4786 * to initialize a seed for random() 4787 */ 4788 static void 4789 key_srandom() 4790 { 4791 srandom(time_second); 4792 } 4793 4794 u_long 4795 key_random() 4796 { 4797 u_long value; 4798 4799 key_randomfill(&value, sizeof(value)); 4800 return value; 4801 } 4802 4803 void 4804 key_randomfill(p, l) 4805 void *p; 4806 size_t l; 4807 { 4808 size_t n; 4809 u_long v; 4810 static int warn = 1; 4811 4812 n = 0; 4813 n = (size_t)read_random(p, (u_int)l); 4814 /* last resort */ 4815 while (n < l) { 4816 v = random(); 4817 bcopy(&v, (u_int8_t *)p + n, 4818 l - n < sizeof(v) ? l - n : sizeof(v)); 4819 n += sizeof(v); 4820 4821 if (warn) { 4822 printf("WARNING: pseudo-random number generator " 4823 "used for IPsec processing\n"); 4824 warn = 0; 4825 } 4826 } 4827 } 4828 4829 /* 4830 * map SADB_SATYPE_* to IPPROTO_*. 4831 * if satype == SADB_SATYPE then satype is mapped to ~0. 4832 * OUT: 4833 * 0: invalid satype. 4834 */ 4835 static u_int16_t 4836 key_satype2proto(satype) 4837 u_int8_t satype; 4838 { 4839 switch (satype) { 4840 case SADB_SATYPE_UNSPEC: 4841 return IPSEC_PROTO_ANY; 4842 case SADB_SATYPE_AH: 4843 return IPPROTO_AH; 4844 case SADB_SATYPE_ESP: 4845 return IPPROTO_ESP; 4846 case SADB_X_SATYPE_IPCOMP: 4847 return IPPROTO_IPCOMP; 4848 case SADB_X_SATYPE_TCPSIGNATURE: 4849 return IPPROTO_TCP; 4850 default: 4851 return 0; 4852 } 4853 /* NOTREACHED */ 4854 } 4855 4856 /* 4857 * map IPPROTO_* to SADB_SATYPE_* 4858 * OUT: 4859 * 0: invalid protocol type. 4860 */ 4861 static u_int8_t 4862 key_proto2satype(proto) 4863 u_int16_t proto; 4864 { 4865 switch (proto) { 4866 case IPPROTO_AH: 4867 return SADB_SATYPE_AH; 4868 case IPPROTO_ESP: 4869 return SADB_SATYPE_ESP; 4870 case IPPROTO_IPCOMP: 4871 return SADB_X_SATYPE_IPCOMP; 4872 case IPPROTO_TCP: 4873 return SADB_X_SATYPE_TCPSIGNATURE; 4874 default: 4875 return 0; 4876 } 4877 /* NOTREACHED */ 4878 } 4879 4880 static int 4881 key_setsecasidx(proto, mode, reqid, src, dst, saidx) 4882 int proto; 4883 int mode; 4884 int reqid; 4885 const struct sadb_address * src; 4886 const struct sadb_address * dst; 4887 struct secasindex * saidx; 4888 { 4889 const union sockaddr_union * src_u = 4890 (const union sockaddr_union *) src; 4891 const union sockaddr_union * dst_u = 4892 (const union sockaddr_union *) dst; 4893 4894 /* sa len safety check */ 4895 if (key_checksalen(src_u) != 0) 4896 return -1; 4897 if (key_checksalen(dst_u) != 0) 4898 return -1; 4899 4900 memset(saidx, 0, sizeof(*saidx)); 4901 saidx->proto = proto; 4902 saidx->mode = mode; 4903 saidx->reqid = reqid; 4904 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4905 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4906 4907 #ifndef IPSEC_NAT_T 4908 key_porttosaddr(&((saidx)->src),0); \ 4909 key_porttosaddr(&((saidx)->dst),0); 4910 #endif 4911 return 0; 4912 } 4913 4914 /* %%% PF_KEY */ 4915 /* 4916 * SADB_GETSPI processing is to receive 4917 * <base, (SA2), src address, dst address, (SPI range)> 4918 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4919 * tree with the status of LARVAL, and send 4920 * <base, SA(*), address(SD)> 4921 * to the IKMPd. 4922 * 4923 * IN: mhp: pointer to the pointer to each header. 4924 * OUT: NULL if fail. 4925 * other if success, return pointer to the message to send. 4926 */ 4927 static int 4928 key_getspi(so, m, mhp) 4929 struct socket *so; 4930 struct mbuf *m; 4931 const struct sadb_msghdr *mhp; 4932 { 4933 struct sadb_address *src0, *dst0; 4934 struct secasindex saidx; 4935 struct secashead *newsah; 4936 struct secasvar *newsav; 4937 u_int8_t proto; 4938 u_int32_t spi; 4939 u_int8_t mode; 4940 u_int16_t reqid; 4941 int error; 4942 4943 /* sanity check */ 4944 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 4945 panic("key_getspi: NULL pointer is passed"); 4946 4947 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4948 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4949 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4950 return key_senderror(so, m, EINVAL); 4951 } 4952 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4953 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4954 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n")); 4955 return key_senderror(so, m, EINVAL); 4956 } 4957 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4958 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4959 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4960 } else { 4961 mode = IPSEC_MODE_ANY; 4962 reqid = 0; 4963 } 4964 4965 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4966 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4967 4968 /* map satype to proto */ 4969 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4970 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n")); 4971 return key_senderror(so, m, EINVAL); 4972 } 4973 4974 4975 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 4976 dst0 + 1, &saidx)) != 0) 4977 return key_senderror(so, m, EINVAL); 4978 4979 /* SPI allocation */ 4980 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4981 &saidx); 4982 if (spi == 0) 4983 return key_senderror(so, m, EINVAL); 4984 4985 /* get a SA index */ 4986 if ((newsah = key_getsah(&saidx)) == NULL) { 4987 /* create a new SA index */ 4988 if ((newsah = key_newsah(&saidx)) == NULL) { 4989 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n")); 4990 return key_senderror(so, m, ENOBUFS); 4991 } 4992 } 4993 4994 /* get a new SA */ 4995 /* XXX rewrite */ 4996 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4997 if (newsav == NULL) { 4998 /* XXX don't free new SA index allocated in above. */ 4999 return key_senderror(so, m, error); 5000 } 5001 5002 /* set spi */ 5003 newsav->spi = htonl(spi); 5004 5005 #ifndef IPSEC_NONBLOCK_ACQUIRE 5006 /* delete the entry in acqtree */ 5007 if (mhp->msg->sadb_msg_seq != 0) { 5008 struct secacq *acq; 5009 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 5010 /* reset counter in order to deletion by timehandler. */ 5011 acq->created = time_second; 5012 acq->count = 0; 5013 } 5014 } 5015 #endif 5016 5017 { 5018 struct mbuf *n, *nn; 5019 struct sadb_sa *m_sa; 5020 struct sadb_msg *newmsg; 5021 int off, len; 5022 5023 /* create new sadb_msg to reply. */ 5024 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5025 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5026 if (len > MCLBYTES) 5027 return key_senderror(so, m, ENOBUFS); 5028 5029 MGETHDR(n, M_DONTWAIT, MT_DATA); 5030 if (len > MHLEN) { 5031 MCLGET(n, M_DONTWAIT); 5032 if ((n->m_flags & M_EXT) == 0) { 5033 m_freem(n); 5034 n = NULL; 5035 } 5036 } 5037 if (!n) 5038 return key_senderror(so, m, ENOBUFS); 5039 5040 n->m_len = len; 5041 n->m_next = NULL; 5042 off = 0; 5043 5044 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 5045 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 5046 5047 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 5048 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 5049 m_sa->sadb_sa_exttype = SADB_EXT_SA; 5050 m_sa->sadb_sa_spi = htonl(spi); 5051 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5052 5053 #ifdef DIAGNOSTIC 5054 if (off != len) 5055 panic("length inconsistency in key_getspi"); 5056 #endif 5057 5058 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5059 SADB_EXT_ADDRESS_DST); 5060 if (!n->m_next) { 5061 m_freem(n); 5062 return key_senderror(so, m, ENOBUFS); 5063 } 5064 5065 if (n->m_len < sizeof(struct sadb_msg)) { 5066 n = m_pullup(n, sizeof(struct sadb_msg)); 5067 if (n == NULL) 5068 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 5069 } 5070 5071 n->m_pkthdr.len = 0; 5072 for (nn = n; nn; nn = nn->m_next) 5073 n->m_pkthdr.len += nn->m_len; 5074 5075 newmsg = mtod(n, struct sadb_msg *); 5076 newmsg->sadb_msg_seq = newsav->seq; 5077 newmsg->sadb_msg_errno = 0; 5078 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5079 5080 m_freem(m); 5081 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5082 } 5083 } 5084 5085 /* 5086 * allocating new SPI 5087 * called by key_getspi(). 5088 * OUT: 5089 * 0: failure. 5090 * others: success. 5091 */ 5092 static u_int32_t 5093 key_do_getnewspi(spirange, saidx) 5094 struct sadb_spirange *spirange; 5095 struct secasindex *saidx; 5096 { 5097 u_int32_t newspi; 5098 u_int32_t spmin, spmax; 5099 int count = key_spi_trycnt; 5100 5101 /* set spi range to allocate */ 5102 if (spirange != NULL) { 5103 spmin = spirange->sadb_spirange_min; 5104 spmax = spirange->sadb_spirange_max; 5105 } else { 5106 spmin = key_spi_minval; 5107 spmax = key_spi_maxval; 5108 } 5109 /* IPCOMP needs 2-byte SPI */ 5110 if (saidx->proto == IPPROTO_IPCOMP) { 5111 u_int32_t t; 5112 if (spmin >= 0x10000) 5113 spmin = 0xffff; 5114 if (spmax >= 0x10000) 5115 spmax = 0xffff; 5116 if (spmin > spmax) { 5117 t = spmin; spmin = spmax; spmax = t; 5118 } 5119 } 5120 5121 if (spmin == spmax) { 5122 if (key_checkspidup(saidx, htonl(spmin)) != NULL) { 5123 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin)); 5124 return 0; 5125 } 5126 5127 count--; /* taking one cost. */ 5128 newspi = spmin; 5129 5130 } else { 5131 5132 /* init SPI */ 5133 newspi = 0; 5134 5135 /* when requesting to allocate spi ranged */ 5136 while (count--) { 5137 /* generate pseudo-random SPI value ranged. */ 5138 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5139 5140 if (key_checkspidup(saidx, htonl(newspi)) == NULL) 5141 break; 5142 } 5143 5144 if (count == 0 || newspi == 0) { 5145 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n")); 5146 return 0; 5147 } 5148 } 5149 5150 /* statistics */ 5151 keystat.getspi_count = 5152 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5153 5154 return newspi; 5155 } 5156 5157 #ifdef IPSEC_NAT_T 5158 /* Handle IPSEC_NAT_T info if present */ 5159 static int 5160 key_handle_natt_info(sav,mhp) 5161 struct secasvar *sav; 5162 const struct sadb_msghdr *mhp; 5163 { 5164 5165 if (mhp->ext[SADB_X_EXT_NAT_T_OA] != NULL) 5166 printf("update: NAT-T OA present\n"); 5167 5168 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5169 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5170 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5171 struct sadb_x_nat_t_type *type; 5172 struct sadb_x_nat_t_port *sport; 5173 struct sadb_x_nat_t_port *dport; 5174 struct sadb_address *addr; 5175 struct sadb_x_nat_t_frag *frag; 5176 5177 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5178 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5179 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5180 ipseclog((LOG_DEBUG, "key_update: " 5181 "invalid message.\n")); 5182 return -1; 5183 } 5184 5185 if ((mhp->ext[SADB_X_EXT_NAT_T_OA] != NULL) && 5186 (mhp->extlen[SADB_X_EXT_NAT_T_OA] < sizeof(*addr))) { 5187 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5188 return -1; 5189 } 5190 5191 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 5192 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 5193 ipseclog((LOG_DEBUG, "key_update: invalid message\n")); 5194 return -1; 5195 } 5196 5197 type = (struct sadb_x_nat_t_type *) 5198 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5199 sport = (struct sadb_x_nat_t_port *) 5200 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5201 dport = (struct sadb_x_nat_t_port *) 5202 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5203 addr = (struct sadb_address *) 5204 mhp->ext[SADB_X_EXT_NAT_T_OA]; 5205 frag = (struct sadb_x_nat_t_frag *) 5206 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5207 5208 if (type) 5209 sav->natt_type = type->sadb_x_nat_t_type_type; 5210 if (sport) 5211 key_porttosaddr(&sav->sah->saidx.src, 5212 sport->sadb_x_nat_t_port_port); 5213 if (dport) 5214 key_porttosaddr(&sav->sah->saidx.dst, 5215 dport->sadb_x_nat_t_port_port); 5216 if (frag) 5217 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5218 else 5219 sav->esp_frag = IP_MAXPACKET; 5220 } 5221 5222 return 0; 5223 } 5224 #endif 5225 5226 5227 /* 5228 * SADB_UPDATE processing 5229 * receive 5230 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5231 * key(AE), (identity(SD),) (sensitivity)> 5232 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5233 * and send 5234 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5235 * (identity(SD),) (sensitivity)> 5236 * to the ikmpd. 5237 * 5238 * m will always be freed. 5239 */ 5240 static int 5241 key_update(so, m, mhp) 5242 struct socket *so; 5243 struct mbuf *m; 5244 const struct sadb_msghdr *mhp; 5245 { 5246 struct sadb_sa *sa0; 5247 struct sadb_address *src0, *dst0; 5248 struct secasindex saidx; 5249 struct secashead *sah; 5250 struct secasvar *sav; 5251 u_int16_t proto; 5252 u_int8_t mode; 5253 u_int16_t reqid; 5254 int error; 5255 5256 /* sanity check */ 5257 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5258 panic("key_update: NULL pointer is passed"); 5259 5260 /* map satype to proto */ 5261 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5262 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n")); 5263 return key_senderror(so, m, EINVAL); 5264 } 5265 5266 if (mhp->ext[SADB_EXT_SA] == NULL || 5267 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5268 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5269 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5270 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5271 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5272 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5273 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5274 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5275 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5276 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5277 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5278 return key_senderror(so, m, EINVAL); 5279 } 5280 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5281 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5282 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5283 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n")); 5284 return key_senderror(so, m, EINVAL); 5285 } 5286 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5287 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5288 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5289 } else { 5290 mode = IPSEC_MODE_ANY; 5291 reqid = 0; 5292 } 5293 /* XXX boundary checking for other extensions */ 5294 5295 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5296 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5297 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5298 5299 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5300 dst0 + 1, &saidx)) != 0) 5301 return key_senderror(so, m, EINVAL); 5302 5303 5304 /* get a SA header */ 5305 if ((sah = key_getsah(&saidx)) == NULL) { 5306 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n")); 5307 return key_senderror(so, m, ENOENT); 5308 } 5309 5310 /* set spidx if there */ 5311 /* XXX rewrite */ 5312 error = key_setident(sah, m, mhp); 5313 if (error) 5314 return key_senderror(so, m, error); 5315 5316 /* find a SA with sequence number. */ 5317 #ifdef IPSEC_DOSEQCHECK 5318 if (mhp->msg->sadb_msg_seq != 0 5319 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5320 ipseclog((LOG_DEBUG, 5321 "key_update: no larval SA with sequence %u exists.\n", 5322 mhp->msg->sadb_msg_seq)); 5323 return key_senderror(so, m, ENOENT); 5324 } 5325 #else 5326 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) { 5327 ipseclog((LOG_DEBUG, 5328 "key_update: no such a SA found (spi:%u)\n", 5329 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5330 return key_senderror(so, m, EINVAL); 5331 } 5332 #endif 5333 5334 /* validity check */ 5335 if (sav->sah->saidx.proto != proto) { 5336 ipseclog((LOG_DEBUG, 5337 "key_update: protocol mismatched (DB=%u param=%u)\n", 5338 sav->sah->saidx.proto, proto)); 5339 return key_senderror(so, m, EINVAL); 5340 } 5341 #ifdef IPSEC_DOSEQCHECK 5342 if (sav->spi != sa0->sadb_sa_spi) { 5343 ipseclog((LOG_DEBUG, 5344 "key_update: SPI mismatched (DB:%u param:%u)\n", 5345 (u_int32_t)ntohl(sav->spi), 5346 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5347 return key_senderror(so, m, EINVAL); 5348 } 5349 #endif 5350 if (sav->pid != mhp->msg->sadb_msg_pid) { 5351 ipseclog((LOG_DEBUG, 5352 "key_update: pid mismatched (DB:%u param:%u)\n", 5353 sav->pid, mhp->msg->sadb_msg_pid)); 5354 return key_senderror(so, m, EINVAL); 5355 } 5356 5357 /* copy sav values */ 5358 error = key_setsaval(sav, m, mhp); 5359 if (error) { 5360 KEY_FREESAV(&sav); 5361 return key_senderror(so, m, error); 5362 } 5363 5364 /* check SA values to be mature. */ 5365 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5366 KEY_FREESAV(&sav); 5367 return key_senderror(so, m, 0); 5368 } 5369 5370 #ifdef IPSEC_NAT_T 5371 if ((error = key_handle_natt_info(sav,mhp)) != 0) 5372 return key_senderror(so, m, EINVAL); 5373 #endif /* IPSEC_NAT_T */ 5374 5375 { 5376 struct mbuf *n; 5377 5378 /* set msg buf from mhp */ 5379 n = key_getmsgbuf_x1(m, mhp); 5380 if (n == NULL) { 5381 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5382 return key_senderror(so, m, ENOBUFS); 5383 } 5384 5385 m_freem(m); 5386 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5387 } 5388 } 5389 5390 /* 5391 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5392 * only called by key_update(). 5393 * OUT: 5394 * NULL : not found 5395 * others : found, pointer to a SA. 5396 */ 5397 #ifdef IPSEC_DOSEQCHECK 5398 static struct secasvar * 5399 key_getsavbyseq(sah, seq) 5400 struct secashead *sah; 5401 u_int32_t seq; 5402 { 5403 struct secasvar *sav; 5404 u_int state; 5405 5406 state = SADB_SASTATE_LARVAL; 5407 5408 /* search SAD with sequence number ? */ 5409 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5410 5411 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq"); 5412 5413 if (sav->seq == seq) { 5414 SA_ADDREF(sav); 5415 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5416 printf("DP key_getsavbyseq cause " 5417 "refcnt++:%d SA:%p\n", 5418 sav->refcnt, sav)); 5419 return sav; 5420 } 5421 } 5422 5423 return NULL; 5424 } 5425 #endif 5426 5427 /* 5428 * SADB_ADD processing 5429 * add an entry to SA database, when received 5430 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5431 * key(AE), (identity(SD),) (sensitivity)> 5432 * from the ikmpd, 5433 * and send 5434 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5435 * (identity(SD),) (sensitivity)> 5436 * to the ikmpd. 5437 * 5438 * IGNORE identity and sensitivity messages. 5439 * 5440 * m will always be freed. 5441 */ 5442 static int 5443 key_add(so, m, mhp) 5444 struct socket *so; 5445 struct mbuf *m; 5446 const struct sadb_msghdr *mhp; 5447 { 5448 struct sadb_sa *sa0; 5449 struct sadb_address *src0, *dst0; 5450 struct secasindex saidx; 5451 struct secashead *newsah; 5452 struct secasvar *newsav; 5453 u_int16_t proto; 5454 u_int8_t mode; 5455 u_int16_t reqid; 5456 int error; 5457 5458 /* sanity check */ 5459 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5460 panic("key_add: NULL pointer is passed"); 5461 5462 /* map satype to proto */ 5463 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5464 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n")); 5465 return key_senderror(so, m, EINVAL); 5466 } 5467 5468 if (mhp->ext[SADB_EXT_SA] == NULL || 5469 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5470 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5471 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5472 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5473 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5474 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5475 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5476 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5477 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5478 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5479 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5480 return key_senderror(so, m, EINVAL); 5481 } 5482 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5483 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5484 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5485 /* XXX need more */ 5486 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n")); 5487 return key_senderror(so, m, EINVAL); 5488 } 5489 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5490 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5491 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5492 } else { 5493 mode = IPSEC_MODE_ANY; 5494 reqid = 0; 5495 } 5496 5497 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5498 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5499 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5500 5501 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1, 5502 dst0 + 1, &saidx)) != 0) 5503 return key_senderror(so, m, EINVAL); 5504 5505 /* get a SA header */ 5506 if ((newsah = key_getsah(&saidx)) == NULL) { 5507 /* create a new SA header */ 5508 if ((newsah = key_newsah(&saidx)) == NULL) { 5509 ipseclog((LOG_DEBUG, "key_add: No more memory.\n")); 5510 return key_senderror(so, m, ENOBUFS); 5511 } 5512 } 5513 5514 /* set spidx if there */ 5515 /* XXX rewrite */ 5516 error = key_setident(newsah, m, mhp); 5517 if (error) { 5518 return key_senderror(so, m, error); 5519 } 5520 5521 /* create new SA entry. */ 5522 /* We can create new SA only if SPI is differenct. */ 5523 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) { 5524 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n")); 5525 return key_senderror(so, m, EEXIST); 5526 } 5527 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5528 if (newsav == NULL) { 5529 return key_senderror(so, m, error); 5530 } 5531 5532 /* check SA values to be mature. */ 5533 if ((error = key_mature(newsav)) != 0) { 5534 KEY_FREESAV(&newsav); 5535 return key_senderror(so, m, error); 5536 } 5537 5538 #ifdef IPSEC_NAT_T 5539 if ((error = key_handle_natt_info(newsav, mhp)) != 0) 5540 return key_senderror(so, m, EINVAL); 5541 #endif /* IPSEC_NAT_T */ 5542 5543 /* 5544 * don't call key_freesav() here, as we would like to keep the SA 5545 * in the database on success. 5546 */ 5547 5548 { 5549 struct mbuf *n; 5550 5551 /* set msg buf from mhp */ 5552 n = key_getmsgbuf_x1(m, mhp); 5553 if (n == NULL) { 5554 ipseclog((LOG_DEBUG, "key_update: No more memory.\n")); 5555 return key_senderror(so, m, ENOBUFS); 5556 } 5557 5558 m_freem(m); 5559 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5560 } 5561 } 5562 5563 /* m is retained */ 5564 static int 5565 key_setident(sah, m, mhp) 5566 struct secashead *sah; 5567 struct mbuf *m; 5568 const struct sadb_msghdr *mhp; 5569 { 5570 const struct sadb_ident *idsrc, *iddst; 5571 int idsrclen, iddstlen; 5572 5573 /* sanity check */ 5574 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5575 panic("key_setident: NULL pointer is passed"); 5576 5577 /* don't make buffer if not there */ 5578 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5579 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5580 sah->idents = NULL; 5581 sah->identd = NULL; 5582 return 0; 5583 } 5584 5585 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5586 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5587 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n")); 5588 return EINVAL; 5589 } 5590 5591 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5592 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5593 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5594 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5595 5596 /* validity check */ 5597 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5598 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n")); 5599 return EINVAL; 5600 } 5601 5602 switch (idsrc->sadb_ident_type) { 5603 case SADB_IDENTTYPE_PREFIX: 5604 case SADB_IDENTTYPE_FQDN: 5605 case SADB_IDENTTYPE_USERFQDN: 5606 default: 5607 /* XXX do nothing */ 5608 sah->idents = NULL; 5609 sah->identd = NULL; 5610 return 0; 5611 } 5612 5613 /* make structure */ 5614 KMALLOC(sah->idents, struct sadb_ident *, idsrclen); 5615 if (sah->idents == NULL) { 5616 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5617 return ENOBUFS; 5618 } 5619 KMALLOC(sah->identd, struct sadb_ident *, iddstlen); 5620 if (sah->identd == NULL) { 5621 KFREE(sah->idents); 5622 sah->idents = NULL; 5623 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n")); 5624 return ENOBUFS; 5625 } 5626 bcopy(idsrc, sah->idents, idsrclen); 5627 bcopy(iddst, sah->identd, iddstlen); 5628 5629 return 0; 5630 } 5631 5632 /* 5633 * m will not be freed on return. 5634 * it is caller's responsibility to free the result. 5635 */ 5636 static struct mbuf * 5637 key_getmsgbuf_x1(m, mhp) 5638 struct mbuf *m; 5639 const struct sadb_msghdr *mhp; 5640 { 5641 struct mbuf *n; 5642 5643 /* sanity check */ 5644 if (m == NULL || mhp == NULL || mhp->msg == NULL) 5645 panic("key_getmsgbuf_x1: NULL pointer is passed"); 5646 5647 /* create new sadb_msg to reply. */ 5648 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5649 SADB_EXT_SA, SADB_X_EXT_SA2, 5650 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5651 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5652 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5653 if (!n) 5654 return NULL; 5655 5656 if (n->m_len < sizeof(struct sadb_msg)) { 5657 n = m_pullup(n, sizeof(struct sadb_msg)); 5658 if (n == NULL) 5659 return NULL; 5660 } 5661 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5662 mtod(n, struct sadb_msg *)->sadb_msg_len = 5663 PFKEY_UNIT64(n->m_pkthdr.len); 5664 5665 return n; 5666 } 5667 5668 static int key_delete_all __P((struct socket *, struct mbuf *, 5669 const struct sadb_msghdr *, u_int16_t)); 5670 5671 /* 5672 * SADB_DELETE processing 5673 * receive 5674 * <base, SA(*), address(SD)> 5675 * from the ikmpd, and set SADB_SASTATE_DEAD, 5676 * and send, 5677 * <base, SA(*), address(SD)> 5678 * to the ikmpd. 5679 * 5680 * m will always be freed. 5681 */ 5682 static int 5683 key_delete(so, m, mhp) 5684 struct socket *so; 5685 struct mbuf *m; 5686 const struct sadb_msghdr *mhp; 5687 { 5688 struct sadb_sa *sa0; 5689 struct sadb_address *src0, *dst0; 5690 struct secasindex saidx; 5691 struct secashead *sah; 5692 struct secasvar *sav = NULL; 5693 u_int16_t proto; 5694 int error; 5695 5696 /* sanity check */ 5697 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5698 panic("key_delete: NULL pointer is passed"); 5699 5700 /* map satype to proto */ 5701 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5702 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n")); 5703 return key_senderror(so, m, EINVAL); 5704 } 5705 5706 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5707 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5708 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5709 return key_senderror(so, m, EINVAL); 5710 } 5711 5712 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5713 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5714 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5715 return key_senderror(so, m, EINVAL); 5716 } 5717 5718 if (mhp->ext[SADB_EXT_SA] == NULL) { 5719 /* 5720 * Caller wants us to delete all non-LARVAL SAs 5721 * that match the src/dst. This is used during 5722 * IKE INITIAL-CONTACT. 5723 */ 5724 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n")); 5725 return key_delete_all(so, m, mhp, proto); 5726 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5727 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n")); 5728 return key_senderror(so, m, EINVAL); 5729 } 5730 5731 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5732 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5733 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5734 5735 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5736 dst0 + 1, &saidx)) != 0) 5737 return key_senderror(so, m, EINVAL); 5738 5739 /* get a SA header */ 5740 LIST_FOREACH(sah, &sahtree, chain) { 5741 if (sah->state == SADB_SASTATE_DEAD) 5742 continue; 5743 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5744 continue; 5745 5746 /* get a SA with SPI. */ 5747 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5748 if (sav) 5749 break; 5750 } 5751 if (sah == NULL) { 5752 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n")); 5753 return key_senderror(so, m, ENOENT); 5754 } 5755 5756 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5757 KEY_FREESAV(&sav); 5758 5759 { 5760 struct mbuf *n; 5761 struct sadb_msg *newmsg; 5762 5763 /* create new sadb_msg to reply. */ 5764 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5765 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5766 if (!n) 5767 return key_senderror(so, m, ENOBUFS); 5768 5769 if (n->m_len < sizeof(struct sadb_msg)) { 5770 n = m_pullup(n, sizeof(struct sadb_msg)); 5771 if (n == NULL) 5772 return key_senderror(so, m, ENOBUFS); 5773 } 5774 newmsg = mtod(n, struct sadb_msg *); 5775 newmsg->sadb_msg_errno = 0; 5776 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5777 5778 m_freem(m); 5779 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5780 } 5781 } 5782 5783 /* 5784 * delete all SAs for src/dst. Called from key_delete(). 5785 */ 5786 static int 5787 key_delete_all(so, m, mhp, proto) 5788 struct socket *so; 5789 struct mbuf *m; 5790 const struct sadb_msghdr *mhp; 5791 u_int16_t proto; 5792 { 5793 struct sadb_address *src0, *dst0; 5794 struct secasindex saidx; 5795 struct secashead *sah; 5796 struct secasvar *sav, *nextsav; 5797 u_int stateidx, state; 5798 int error; 5799 5800 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5801 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5802 5803 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5804 dst0 + 1, &saidx)) != 0) 5805 return key_senderror(so, m, EINVAL); 5806 5807 LIST_FOREACH(sah, &sahtree, chain) { 5808 if (sah->state == SADB_SASTATE_DEAD) 5809 continue; 5810 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5811 continue; 5812 5813 /* Delete all non-LARVAL SAs. */ 5814 for (stateidx = 0; 5815 stateidx < _ARRAYLEN(saorder_state_alive); 5816 stateidx++) { 5817 state = saorder_state_alive[stateidx]; 5818 if (state == SADB_SASTATE_LARVAL) 5819 continue; 5820 for (sav = LIST_FIRST(&sah->savtree[state]); 5821 sav != NULL; sav = nextsav) { 5822 nextsav = LIST_NEXT(sav, chain); 5823 /* sanity check */ 5824 if (sav->state != state) { 5825 ipseclog((LOG_DEBUG, "key_delete_all: " 5826 "invalid sav->state " 5827 "(queue: %d SA: %d)\n", 5828 state, sav->state)); 5829 continue; 5830 } 5831 5832 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5833 KEY_FREESAV(&sav); 5834 } 5835 } 5836 } 5837 { 5838 struct mbuf *n; 5839 struct sadb_msg *newmsg; 5840 5841 /* create new sadb_msg to reply. */ 5842 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5843 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5844 if (!n) 5845 return key_senderror(so, m, ENOBUFS); 5846 5847 if (n->m_len < sizeof(struct sadb_msg)) { 5848 n = m_pullup(n, sizeof(struct sadb_msg)); 5849 if (n == NULL) 5850 return key_senderror(so, m, ENOBUFS); 5851 } 5852 newmsg = mtod(n, struct sadb_msg *); 5853 newmsg->sadb_msg_errno = 0; 5854 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5855 5856 m_freem(m); 5857 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5858 } 5859 } 5860 5861 /* 5862 * SADB_GET processing 5863 * receive 5864 * <base, SA(*), address(SD)> 5865 * from the ikmpd, and get a SP and a SA to respond, 5866 * and send, 5867 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5868 * (identity(SD),) (sensitivity)> 5869 * to the ikmpd. 5870 * 5871 * m will always be freed. 5872 */ 5873 static int 5874 key_get(so, m, mhp) 5875 struct socket *so; 5876 struct mbuf *m; 5877 const struct sadb_msghdr *mhp; 5878 { 5879 struct sadb_sa *sa0; 5880 struct sadb_address *src0, *dst0; 5881 struct secasindex saidx; 5882 struct secashead *sah; 5883 struct secasvar *sav = NULL; 5884 u_int16_t proto; 5885 int error; 5886 5887 /* sanity check */ 5888 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 5889 panic("key_get: NULL pointer is passed"); 5890 5891 /* map satype to proto */ 5892 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5893 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n")); 5894 return key_senderror(so, m, EINVAL); 5895 } 5896 5897 if (mhp->ext[SADB_EXT_SA] == NULL || 5898 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5899 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5900 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5901 return key_senderror(so, m, EINVAL); 5902 } 5903 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5904 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5905 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5906 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n")); 5907 return key_senderror(so, m, EINVAL); 5908 } 5909 5910 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5911 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5912 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5913 5914 5915 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 5916 dst0 + 1, &saidx)) != 0) 5917 return key_senderror(so, m, EINVAL); 5918 5919 /* get a SA header */ 5920 LIST_FOREACH(sah, &sahtree, chain) { 5921 if (sah->state == SADB_SASTATE_DEAD) 5922 continue; 5923 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5924 continue; 5925 5926 /* get a SA with SPI. */ 5927 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5928 if (sav) 5929 break; 5930 } 5931 if (sah == NULL) { 5932 ipseclog((LOG_DEBUG, "key_get: no SA found.\n")); 5933 return key_senderror(so, m, ENOENT); 5934 } 5935 5936 { 5937 struct mbuf *n; 5938 u_int8_t satype; 5939 5940 /* map proto to satype */ 5941 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5942 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n")); 5943 return key_senderror(so, m, EINVAL); 5944 } 5945 5946 /* create new sadb_msg to reply. */ 5947 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5948 mhp->msg->sadb_msg_pid); 5949 if (!n) 5950 return key_senderror(so, m, ENOBUFS); 5951 5952 m_freem(m); 5953 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5954 } 5955 } 5956 5957 /* XXX make it sysctl-configurable? */ 5958 static void 5959 key_getcomb_setlifetime(comb) 5960 struct sadb_comb *comb; 5961 { 5962 5963 comb->sadb_comb_soft_allocations = 1; 5964 comb->sadb_comb_hard_allocations = 1; 5965 comb->sadb_comb_soft_bytes = 0; 5966 comb->sadb_comb_hard_bytes = 0; 5967 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5968 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5969 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5970 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5971 } 5972 5973 /* 5974 * XXX reorder combinations by preference 5975 * XXX no idea if the user wants ESP authentication or not 5976 */ 5977 static struct mbuf * 5978 key_getcomb_esp() 5979 { 5980 struct sadb_comb *comb; 5981 struct enc_xform *algo; 5982 struct mbuf *result = NULL, *m, *n; 5983 int encmin; 5984 int i, off, o; 5985 int totlen; 5986 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5987 5988 m = NULL; 5989 for (i = 1; i <= SADB_EALG_MAX; i++) { 5990 algo = esp_algorithm_lookup(i); 5991 if (algo == NULL) 5992 continue; 5993 5994 /* discard algorithms with key size smaller than system min */ 5995 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5996 continue; 5997 if (_BITS(algo->minkey) < ipsec_esp_keymin) 5998 encmin = ipsec_esp_keymin; 5999 else 6000 encmin = _BITS(algo->minkey); 6001 6002 if (ipsec_esp_auth) 6003 m = key_getcomb_ah(); 6004 else { 6005 IPSEC_ASSERT(l <= MLEN, 6006 ("key_getcomb_esp: l=%u > MLEN=%lu", 6007 l, (u_long) MLEN)); 6008 MGET(m, M_DONTWAIT, MT_DATA); 6009 if (m) { 6010 M_ALIGN(m, l); 6011 m->m_len = l; 6012 m->m_next = NULL; 6013 bzero(mtod(m, void *), m->m_len); 6014 } 6015 } 6016 if (!m) 6017 goto fail; 6018 6019 totlen = 0; 6020 for (n = m; n; n = n->m_next) 6021 totlen += n->m_len; 6022 IPSEC_ASSERT((totlen % l) == 0, 6023 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l)); 6024 6025 for (off = 0; off < totlen; off += l) { 6026 n = m_pulldown(m, off, l, &o); 6027 if (!n) { 6028 /* m is already freed */ 6029 goto fail; 6030 } 6031 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6032 bzero(comb, sizeof(*comb)); 6033 key_getcomb_setlifetime(comb); 6034 comb->sadb_comb_encrypt = i; 6035 comb->sadb_comb_encrypt_minbits = encmin; 6036 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6037 } 6038 6039 if (!result) 6040 result = m; 6041 else 6042 m_cat(result, m); 6043 } 6044 6045 return result; 6046 6047 fail: 6048 if (result) 6049 m_freem(result); 6050 return NULL; 6051 } 6052 6053 static void 6054 key_getsizes_ah( 6055 const struct auth_hash *ah, 6056 int alg, 6057 u_int16_t* ksmin, 6058 u_int16_t* ksmax) 6059 { 6060 *ksmin = *ksmax = ah->keysize; 6061 if (ah->keysize == 0) { 6062 /* 6063 * Transform takes arbitrary key size but algorithm 6064 * key size is restricted. Enforce this here. 6065 */ 6066 switch (alg) { 6067 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6068 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6069 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break; 6070 default: 6071 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n", 6072 alg)); 6073 break; 6074 } 6075 } 6076 } 6077 6078 /* 6079 * XXX reorder combinations by preference 6080 */ 6081 static struct mbuf * 6082 key_getcomb_ah() 6083 { 6084 struct sadb_comb *comb; 6085 struct auth_hash *algo; 6086 struct mbuf *m; 6087 u_int16_t minkeysize, maxkeysize; 6088 int i; 6089 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6090 6091 m = NULL; 6092 for (i = 1; i <= SADB_AALG_MAX; i++) { 6093 #if 1 6094 /* we prefer HMAC algorithms, not old algorithms */ 6095 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 6096 continue; 6097 #endif 6098 algo = ah_algorithm_lookup(i); 6099 if (!algo) 6100 continue; 6101 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6102 /* discard algorithms with key size smaller than system min */ 6103 if (_BITS(minkeysize) < ipsec_ah_keymin) 6104 continue; 6105 6106 if (!m) { 6107 IPSEC_ASSERT(l <= MLEN, 6108 ("key_getcomb_ah: l=%u > MLEN=%lu", 6109 l, (u_long) MLEN)); 6110 MGET(m, M_DONTWAIT, MT_DATA); 6111 if (m) { 6112 M_ALIGN(m, l); 6113 m->m_len = l; 6114 m->m_next = NULL; 6115 } 6116 } else 6117 M_PREPEND(m, l, M_DONTWAIT); 6118 if (!m) 6119 return NULL; 6120 6121 comb = mtod(m, struct sadb_comb *); 6122 bzero(comb, sizeof(*comb)); 6123 key_getcomb_setlifetime(comb); 6124 comb->sadb_comb_auth = i; 6125 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6126 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6127 } 6128 6129 return m; 6130 } 6131 6132 /* 6133 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6134 * XXX reorder combinations by preference 6135 */ 6136 static struct mbuf * 6137 key_getcomb_ipcomp() 6138 { 6139 struct sadb_comb *comb; 6140 struct comp_algo *algo; 6141 struct mbuf *m; 6142 int i; 6143 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6144 6145 m = NULL; 6146 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6147 algo = ipcomp_algorithm_lookup(i); 6148 if (!algo) 6149 continue; 6150 6151 if (!m) { 6152 IPSEC_ASSERT(l <= MLEN, 6153 ("key_getcomb_ipcomp: l=%u > MLEN=%lu", 6154 l, (u_long) MLEN)); 6155 MGET(m, M_DONTWAIT, MT_DATA); 6156 if (m) { 6157 M_ALIGN(m, l); 6158 m->m_len = l; 6159 m->m_next = NULL; 6160 } 6161 } else 6162 M_PREPEND(m, l, M_DONTWAIT); 6163 if (!m) 6164 return NULL; 6165 6166 comb = mtod(m, struct sadb_comb *); 6167 bzero(comb, sizeof(*comb)); 6168 key_getcomb_setlifetime(comb); 6169 comb->sadb_comb_encrypt = i; 6170 /* what should we set into sadb_comb_*_{min,max}bits? */ 6171 } 6172 6173 return m; 6174 } 6175 6176 /* 6177 * XXX no way to pass mode (transport/tunnel) to userland 6178 * XXX replay checking? 6179 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6180 */ 6181 static struct mbuf * 6182 key_getprop(saidx) 6183 const struct secasindex *saidx; 6184 { 6185 struct sadb_prop *prop; 6186 struct mbuf *m, *n; 6187 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6188 int totlen; 6189 6190 switch (saidx->proto) { 6191 case IPPROTO_ESP: 6192 m = key_getcomb_esp(); 6193 break; 6194 case IPPROTO_AH: 6195 m = key_getcomb_ah(); 6196 break; 6197 case IPPROTO_IPCOMP: 6198 m = key_getcomb_ipcomp(); 6199 break; 6200 default: 6201 return NULL; 6202 } 6203 6204 if (!m) 6205 return NULL; 6206 M_PREPEND(m, l, M_DONTWAIT); 6207 if (!m) 6208 return NULL; 6209 6210 totlen = 0; 6211 for (n = m; n; n = n->m_next) 6212 totlen += n->m_len; 6213 6214 prop = mtod(m, struct sadb_prop *); 6215 bzero(prop, sizeof(*prop)); 6216 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6217 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6218 prop->sadb_prop_replay = 32; /* XXX */ 6219 6220 return m; 6221 } 6222 6223 /* 6224 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6225 * send 6226 * <base, SA, address(SD), (address(P)), x_policy, 6227 * (identity(SD),) (sensitivity,) proposal> 6228 * to KMD, and expect to receive 6229 * <base> with SADB_ACQUIRE if error occurred, 6230 * or 6231 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6232 * from KMD by PF_KEY. 6233 * 6234 * XXX x_policy is outside of RFC2367 (KAME extension). 6235 * XXX sensitivity is not supported. 6236 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6237 * see comment for key_getcomb_ipcomp(). 6238 * 6239 * OUT: 6240 * 0 : succeed 6241 * others: error number 6242 */ 6243 static int 6244 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6245 { 6246 struct mbuf *result = NULL, *m; 6247 #ifndef IPSEC_NONBLOCK_ACQUIRE 6248 struct secacq *newacq; 6249 #endif 6250 u_int8_t satype; 6251 int error = -1; 6252 u_int32_t seq; 6253 6254 /* sanity check */ 6255 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx")); 6256 satype = key_proto2satype(saidx->proto); 6257 IPSEC_ASSERT(satype != 0, 6258 ("key_acquire: null satype, protocol %u", saidx->proto)); 6259 6260 #ifndef IPSEC_NONBLOCK_ACQUIRE 6261 /* 6262 * We never do anything about acquirng SA. There is anather 6263 * solution that kernel blocks to send SADB_ACQUIRE message until 6264 * getting something message from IKEd. In later case, to be 6265 * managed with ACQUIRING list. 6266 */ 6267 /* Get an entry to check whether sending message or not. */ 6268 if ((newacq = key_getacq(saidx)) != NULL) { 6269 if (key_blockacq_count < newacq->count) { 6270 /* reset counter and do send message. */ 6271 newacq->count = 0; 6272 } else { 6273 /* increment counter and do nothing. */ 6274 newacq->count++; 6275 return 0; 6276 } 6277 } else { 6278 /* make new entry for blocking to send SADB_ACQUIRE. */ 6279 if ((newacq = key_newacq(saidx)) == NULL) 6280 return ENOBUFS; 6281 6282 /* add to acqtree */ 6283 LIST_INSERT_HEAD(&acqtree, newacq, chain); 6284 } 6285 #endif 6286 6287 6288 #ifndef IPSEC_NONBLOCK_ACQUIRE 6289 seq = newacq->seq; 6290 #else 6291 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6292 #endif 6293 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6294 if (!m) { 6295 error = ENOBUFS; 6296 goto fail; 6297 } 6298 result = m; 6299 6300 /* set sadb_address for saidx's. */ 6301 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6302 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6303 if (!m) { 6304 error = ENOBUFS; 6305 goto fail; 6306 } 6307 m_cat(result, m); 6308 6309 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6310 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6311 if (!m) { 6312 error = ENOBUFS; 6313 goto fail; 6314 } 6315 m_cat(result, m); 6316 6317 /* XXX proxy address (optional) */ 6318 6319 /* set sadb_x_policy */ 6320 if (sp) { 6321 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6322 if (!m) { 6323 error = ENOBUFS; 6324 goto fail; 6325 } 6326 m_cat(result, m); 6327 } 6328 6329 /* XXX identity (optional) */ 6330 #if 0 6331 if (idexttype && fqdn) { 6332 /* create identity extension (FQDN) */ 6333 struct sadb_ident *id; 6334 int fqdnlen; 6335 6336 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6337 id = (struct sadb_ident *)p; 6338 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6339 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6340 id->sadb_ident_exttype = idexttype; 6341 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6342 bcopy(fqdn, id + 1, fqdnlen); 6343 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6344 } 6345 6346 if (idexttype) { 6347 /* create identity extension (USERFQDN) */ 6348 struct sadb_ident *id; 6349 int userfqdnlen; 6350 6351 if (userfqdn) { 6352 /* +1 for terminating-NUL */ 6353 userfqdnlen = strlen(userfqdn) + 1; 6354 } else 6355 userfqdnlen = 0; 6356 id = (struct sadb_ident *)p; 6357 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6358 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6359 id->sadb_ident_exttype = idexttype; 6360 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6361 /* XXX is it correct? */ 6362 if (curlwp) 6363 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6364 if (userfqdn && userfqdnlen) 6365 bcopy(userfqdn, id + 1, userfqdnlen); 6366 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6367 } 6368 #endif 6369 6370 /* XXX sensitivity (optional) */ 6371 6372 /* create proposal/combination extension */ 6373 m = key_getprop(saidx); 6374 #if 0 6375 /* 6376 * spec conformant: always attach proposal/combination extension, 6377 * the problem is that we have no way to attach it for ipcomp, 6378 * due to the way sadb_comb is declared in RFC2367. 6379 */ 6380 if (!m) { 6381 error = ENOBUFS; 6382 goto fail; 6383 } 6384 m_cat(result, m); 6385 #else 6386 /* 6387 * outside of spec; make proposal/combination extension optional. 6388 */ 6389 if (m) 6390 m_cat(result, m); 6391 #endif 6392 6393 if ((result->m_flags & M_PKTHDR) == 0) { 6394 error = EINVAL; 6395 goto fail; 6396 } 6397 6398 if (result->m_len < sizeof(struct sadb_msg)) { 6399 result = m_pullup(result, sizeof(struct sadb_msg)); 6400 if (result == NULL) { 6401 error = ENOBUFS; 6402 goto fail; 6403 } 6404 } 6405 6406 result->m_pkthdr.len = 0; 6407 for (m = result; m; m = m->m_next) 6408 result->m_pkthdr.len += m->m_len; 6409 6410 mtod(result, struct sadb_msg *)->sadb_msg_len = 6411 PFKEY_UNIT64(result->m_pkthdr.len); 6412 6413 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6414 6415 fail: 6416 if (result) 6417 m_freem(result); 6418 return error; 6419 } 6420 6421 #ifndef IPSEC_NONBLOCK_ACQUIRE 6422 static struct secacq * 6423 key_newacq(const struct secasindex *saidx) 6424 { 6425 struct secacq *newacq; 6426 6427 /* get new entry */ 6428 KMALLOC(newacq, struct secacq *, sizeof(struct secacq)); 6429 if (newacq == NULL) { 6430 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n")); 6431 return NULL; 6432 } 6433 bzero(newacq, sizeof(*newacq)); 6434 6435 /* copy secindex */ 6436 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6437 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6438 newacq->created = time_second; 6439 newacq->count = 0; 6440 6441 return newacq; 6442 } 6443 6444 static struct secacq * 6445 key_getacq(const struct secasindex *saidx) 6446 { 6447 struct secacq *acq; 6448 6449 LIST_FOREACH(acq, &acqtree, chain) { 6450 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6451 return acq; 6452 } 6453 6454 return NULL; 6455 } 6456 6457 static struct secacq * 6458 key_getacqbyseq(seq) 6459 u_int32_t seq; 6460 { 6461 struct secacq *acq; 6462 6463 LIST_FOREACH(acq, &acqtree, chain) { 6464 if (acq->seq == seq) 6465 return acq; 6466 } 6467 6468 return NULL; 6469 } 6470 #endif 6471 6472 static struct secspacq * 6473 key_newspacq(spidx) 6474 struct secpolicyindex *spidx; 6475 { 6476 struct secspacq *acq; 6477 6478 /* get new entry */ 6479 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq)); 6480 if (acq == NULL) { 6481 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n")); 6482 return NULL; 6483 } 6484 bzero(acq, sizeof(*acq)); 6485 6486 /* copy secindex */ 6487 bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6488 acq->created = time_second; 6489 acq->count = 0; 6490 6491 return acq; 6492 } 6493 6494 static struct secspacq * 6495 key_getspacq(spidx) 6496 struct secpolicyindex *spidx; 6497 { 6498 struct secspacq *acq; 6499 6500 LIST_FOREACH(acq, &spacqtree, chain) { 6501 if (key_cmpspidx_exactly(spidx, &acq->spidx)) 6502 return acq; 6503 } 6504 6505 return NULL; 6506 } 6507 6508 /* 6509 * SADB_ACQUIRE processing, 6510 * in first situation, is receiving 6511 * <base> 6512 * from the ikmpd, and clear sequence of its secasvar entry. 6513 * 6514 * In second situation, is receiving 6515 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6516 * from a user land process, and return 6517 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6518 * to the socket. 6519 * 6520 * m will always be freed. 6521 */ 6522 static int 6523 key_acquire2(so, m, mhp) 6524 struct socket *so; 6525 struct mbuf *m; 6526 const struct sadb_msghdr *mhp; 6527 { 6528 const struct sadb_address *src0, *dst0; 6529 struct secasindex saidx; 6530 struct secashead *sah; 6531 u_int16_t proto; 6532 int error; 6533 6534 /* sanity check */ 6535 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6536 panic("key_acquire2: NULL pointer is passed"); 6537 6538 /* 6539 * Error message from KMd. 6540 * We assume that if error was occurred in IKEd, the length of PFKEY 6541 * message is equal to the size of sadb_msg structure. 6542 * We do not raise error even if error occurred in this function. 6543 */ 6544 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6545 #ifndef IPSEC_NONBLOCK_ACQUIRE 6546 struct secacq *acq; 6547 6548 /* check sequence number */ 6549 if (mhp->msg->sadb_msg_seq == 0) { 6550 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n")); 6551 m_freem(m); 6552 return 0; 6553 } 6554 6555 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6556 /* 6557 * the specified larval SA is already gone, or we got 6558 * a bogus sequence number. we can silently ignore it. 6559 */ 6560 m_freem(m); 6561 return 0; 6562 } 6563 6564 /* reset acq counter in order to deletion by timehander. */ 6565 acq->created = time_second; 6566 acq->count = 0; 6567 #endif 6568 m_freem(m); 6569 return 0; 6570 } 6571 6572 /* 6573 * This message is from user land. 6574 */ 6575 6576 /* map satype to proto */ 6577 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6578 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n")); 6579 return key_senderror(so, m, EINVAL); 6580 } 6581 6582 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6583 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6584 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6585 /* error */ 6586 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6587 return key_senderror(so, m, EINVAL); 6588 } 6589 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6590 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6591 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6592 /* error */ 6593 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n")); 6594 return key_senderror(so, m, EINVAL); 6595 } 6596 6597 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6598 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6599 6600 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1, 6601 dst0 + 1, &saidx)) != 0) 6602 return key_senderror(so, m, EINVAL); 6603 6604 /* get a SA index */ 6605 LIST_FOREACH(sah, &sahtree, chain) { 6606 if (sah->state == SADB_SASTATE_DEAD) 6607 continue; 6608 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6609 break; 6610 } 6611 if (sah != NULL) { 6612 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n")); 6613 return key_senderror(so, m, EEXIST); 6614 } 6615 6616 error = key_acquire(&saidx, NULL); 6617 if (error != 0) { 6618 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned " 6619 "from key_acquire.\n", mhp->msg->sadb_msg_errno)); 6620 return key_senderror(so, m, error); 6621 } 6622 6623 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6624 } 6625 6626 /* 6627 * SADB_REGISTER processing. 6628 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6629 * receive 6630 * <base> 6631 * from the ikmpd, and register a socket to send PF_KEY messages, 6632 * and send 6633 * <base, supported> 6634 * to KMD by PF_KEY. 6635 * If socket is detached, must free from regnode. 6636 * 6637 * m will always be freed. 6638 */ 6639 static int 6640 key_register(so, m, mhp) 6641 struct socket *so; 6642 struct mbuf *m; 6643 const struct sadb_msghdr *mhp; 6644 { 6645 struct secreg *reg, *newreg = 0; 6646 6647 /* sanity check */ 6648 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 6649 panic("key_register: NULL pointer is passed"); 6650 6651 /* check for invalid register message */ 6652 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6653 return key_senderror(so, m, EINVAL); 6654 6655 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6656 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6657 goto setmsg; 6658 6659 /* check whether existing or not */ 6660 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6661 if (reg->so == so) { 6662 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n")); 6663 return key_senderror(so, m, EEXIST); 6664 } 6665 } 6666 6667 /* create regnode */ 6668 KMALLOC(newreg, struct secreg *, sizeof(*newreg)); 6669 if (newreg == NULL) { 6670 ipseclog((LOG_DEBUG, "key_register: No more memory.\n")); 6671 return key_senderror(so, m, ENOBUFS); 6672 } 6673 bzero(newreg, sizeof(*newreg)); 6674 6675 newreg->so = so; 6676 ((struct keycb *)sotorawcb(so))->kp_registered++; 6677 6678 /* add regnode to regtree. */ 6679 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6680 6681 setmsg: 6682 { 6683 struct mbuf *n; 6684 struct sadb_msg *newmsg; 6685 struct sadb_supported *sup; 6686 u_int len, alen, elen; 6687 int off; 6688 int i; 6689 struct sadb_alg *alg; 6690 6691 /* create new sadb_msg to reply. */ 6692 alen = 0; 6693 for (i = 1; i <= SADB_AALG_MAX; i++) { 6694 if (ah_algorithm_lookup(i)) 6695 alen += sizeof(struct sadb_alg); 6696 } 6697 if (alen) 6698 alen += sizeof(struct sadb_supported); 6699 elen = 0; 6700 for (i = 1; i <= SADB_EALG_MAX; i++) { 6701 if (esp_algorithm_lookup(i)) 6702 elen += sizeof(struct sadb_alg); 6703 } 6704 if (elen) 6705 elen += sizeof(struct sadb_supported); 6706 6707 len = sizeof(struct sadb_msg) + alen + elen; 6708 6709 if (len > MCLBYTES) 6710 return key_senderror(so, m, ENOBUFS); 6711 6712 MGETHDR(n, M_DONTWAIT, MT_DATA); 6713 if (len > MHLEN) { 6714 MCLGET(n, M_DONTWAIT); 6715 if ((n->m_flags & M_EXT) == 0) { 6716 m_freem(n); 6717 n = NULL; 6718 } 6719 } 6720 if (!n) 6721 return key_senderror(so, m, ENOBUFS); 6722 6723 n->m_pkthdr.len = n->m_len = len; 6724 n->m_next = NULL; 6725 off = 0; 6726 6727 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6728 newmsg = mtod(n, struct sadb_msg *); 6729 newmsg->sadb_msg_errno = 0; 6730 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6731 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6732 6733 /* for authentication algorithm */ 6734 if (alen) { 6735 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6736 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6737 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6738 off += PFKEY_ALIGN8(sizeof(*sup)); 6739 6740 for (i = 1; i <= SADB_AALG_MAX; i++) { 6741 struct auth_hash *aalgo; 6742 u_int16_t minkeysize, maxkeysize; 6743 6744 aalgo = ah_algorithm_lookup(i); 6745 if (!aalgo) 6746 continue; 6747 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6748 alg->sadb_alg_id = i; 6749 alg->sadb_alg_ivlen = 0; 6750 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6751 alg->sadb_alg_minbits = _BITS(minkeysize); 6752 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6753 off += PFKEY_ALIGN8(sizeof(*alg)); 6754 } 6755 } 6756 6757 /* for encryption algorithm */ 6758 if (elen) { 6759 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6760 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6761 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6762 off += PFKEY_ALIGN8(sizeof(*sup)); 6763 6764 for (i = 1; i <= SADB_EALG_MAX; i++) { 6765 struct enc_xform *ealgo; 6766 6767 ealgo = esp_algorithm_lookup(i); 6768 if (!ealgo) 6769 continue; 6770 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6771 alg->sadb_alg_id = i; 6772 alg->sadb_alg_ivlen = ealgo->blocksize; 6773 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6774 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6775 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6776 } 6777 } 6778 6779 #ifdef DIAGNOSTIC 6780 if (off != len) 6781 panic("length assumption failed in key_register"); 6782 #endif 6783 6784 m_freem(m); 6785 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6786 } 6787 } 6788 6789 /* 6790 * free secreg entry registered. 6791 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6792 */ 6793 void 6794 key_freereg(so) 6795 struct socket *so; 6796 { 6797 struct secreg *reg; 6798 int i; 6799 6800 /* sanity check */ 6801 if (so == NULL) 6802 panic("key_freereg: NULL pointer is passed"); 6803 6804 /* 6805 * check whether existing or not. 6806 * check all type of SA, because there is a potential that 6807 * one socket is registered to multiple type of SA. 6808 */ 6809 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6810 LIST_FOREACH(reg, ®tree[i], chain) { 6811 if (reg->so == so 6812 && __LIST_CHAINED(reg)) { 6813 LIST_REMOVE(reg, chain); 6814 KFREE(reg); 6815 break; 6816 } 6817 } 6818 } 6819 6820 return; 6821 } 6822 6823 /* 6824 * SADB_EXPIRE processing 6825 * send 6826 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6827 * to KMD by PF_KEY. 6828 * NOTE: We send only soft lifetime extension. 6829 * 6830 * OUT: 0 : succeed 6831 * others : error number 6832 */ 6833 static int 6834 key_expire(sav) 6835 struct secasvar *sav; 6836 { 6837 int s; 6838 int satype; 6839 struct mbuf *result = NULL, *m; 6840 int len; 6841 int error = -1; 6842 struct sadb_lifetime *lt; 6843 6844 /* XXX: Why do we lock ? */ 6845 s = splsoftnet(); /*called from softclock()*/ 6846 6847 /* sanity check */ 6848 if (sav == NULL) 6849 panic("key_expire: NULL pointer is passed"); 6850 if (sav->sah == NULL) 6851 panic("key_expire: Why was SA index in SA NULL"); 6852 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) 6853 panic("key_expire: invalid proto is passed"); 6854 6855 /* set msg header */ 6856 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6857 if (!m) { 6858 error = ENOBUFS; 6859 goto fail; 6860 } 6861 result = m; 6862 6863 /* create SA extension */ 6864 m = key_setsadbsa(sav); 6865 if (!m) { 6866 error = ENOBUFS; 6867 goto fail; 6868 } 6869 m_cat(result, m); 6870 6871 /* create SA extension */ 6872 m = key_setsadbxsa2(sav->sah->saidx.mode, 6873 sav->replay ? sav->replay->count : 0, 6874 sav->sah->saidx.reqid); 6875 if (!m) { 6876 error = ENOBUFS; 6877 goto fail; 6878 } 6879 m_cat(result, m); 6880 6881 /* create lifetime extension (current and soft) */ 6882 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6883 m = key_alloc_mbuf(len); 6884 if (!m || m->m_next) { /*XXX*/ 6885 if (m) 6886 m_freem(m); 6887 error = ENOBUFS; 6888 goto fail; 6889 } 6890 bzero(mtod(m, void *), len); 6891 lt = mtod(m, struct sadb_lifetime *); 6892 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6893 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6894 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6895 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6896 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime; 6897 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime; 6898 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6899 bcopy(sav->lft_s, lt, sizeof(*lt)); 6900 m_cat(result, m); 6901 6902 /* set sadb_address for source */ 6903 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6904 &sav->sah->saidx.src.sa, 6905 FULLMASK, IPSEC_ULPROTO_ANY); 6906 if (!m) { 6907 error = ENOBUFS; 6908 goto fail; 6909 } 6910 m_cat(result, m); 6911 6912 /* set sadb_address for destination */ 6913 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6914 &sav->sah->saidx.dst.sa, 6915 FULLMASK, IPSEC_ULPROTO_ANY); 6916 if (!m) { 6917 error = ENOBUFS; 6918 goto fail; 6919 } 6920 m_cat(result, m); 6921 6922 if ((result->m_flags & M_PKTHDR) == 0) { 6923 error = EINVAL; 6924 goto fail; 6925 } 6926 6927 if (result->m_len < sizeof(struct sadb_msg)) { 6928 result = m_pullup(result, sizeof(struct sadb_msg)); 6929 if (result == NULL) { 6930 error = ENOBUFS; 6931 goto fail; 6932 } 6933 } 6934 6935 result->m_pkthdr.len = 0; 6936 for (m = result; m; m = m->m_next) 6937 result->m_pkthdr.len += m->m_len; 6938 6939 mtod(result, struct sadb_msg *)->sadb_msg_len = 6940 PFKEY_UNIT64(result->m_pkthdr.len); 6941 6942 splx(s); 6943 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6944 6945 fail: 6946 if (result) 6947 m_freem(result); 6948 splx(s); 6949 return error; 6950 } 6951 6952 /* 6953 * SADB_FLUSH processing 6954 * receive 6955 * <base> 6956 * from the ikmpd, and free all entries in secastree. 6957 * and send, 6958 * <base> 6959 * to the ikmpd. 6960 * NOTE: to do is only marking SADB_SASTATE_DEAD. 6961 * 6962 * m will always be freed. 6963 */ 6964 static int 6965 key_flush(so, m, mhp) 6966 struct socket *so; 6967 struct mbuf *m; 6968 const struct sadb_msghdr *mhp; 6969 { 6970 struct sadb_msg *newmsg; 6971 struct secashead *sah, *nextsah; 6972 struct secasvar *sav, *nextsav; 6973 u_int16_t proto; 6974 u_int8_t state; 6975 u_int stateidx; 6976 6977 /* sanity check */ 6978 if (so == NULL || mhp == NULL || mhp->msg == NULL) 6979 panic("key_flush: NULL pointer is passed"); 6980 6981 /* map satype to proto */ 6982 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6983 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n")); 6984 return key_senderror(so, m, EINVAL); 6985 } 6986 6987 /* no SATYPE specified, i.e. flushing all SA. */ 6988 for (sah = LIST_FIRST(&sahtree); 6989 sah != NULL; 6990 sah = nextsah) { 6991 nextsah = LIST_NEXT(sah, chain); 6992 6993 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6994 && proto != sah->saidx.proto) 6995 continue; 6996 6997 for (stateidx = 0; 6998 stateidx < _ARRAYLEN(saorder_state_alive); 6999 stateidx++) { 7000 state = saorder_state_any[stateidx]; 7001 for (sav = LIST_FIRST(&sah->savtree[state]); 7002 sav != NULL; 7003 sav = nextsav) { 7004 7005 nextsav = LIST_NEXT(sav, chain); 7006 7007 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7008 KEY_FREESAV(&sav); 7009 } 7010 } 7011 7012 sah->state = SADB_SASTATE_DEAD; 7013 } 7014 7015 if (m->m_len < sizeof(struct sadb_msg) || 7016 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7017 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n")); 7018 return key_senderror(so, m, ENOBUFS); 7019 } 7020 7021 if (m->m_next) 7022 m_freem(m->m_next); 7023 m->m_next = NULL; 7024 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7025 newmsg = mtod(m, struct sadb_msg *); 7026 newmsg->sadb_msg_errno = 0; 7027 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7028 7029 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7030 } 7031 7032 7033 static struct mbuf * 7034 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7035 { 7036 struct secashead *sah; 7037 struct secasvar *sav; 7038 u_int16_t proto; 7039 u_int stateidx; 7040 u_int8_t satype; 7041 u_int8_t state; 7042 int cnt; 7043 struct mbuf *m, *n, *prev; 7044 int totlen; 7045 7046 *lenp = 0; 7047 7048 /* map satype to proto */ 7049 if ((proto = key_satype2proto(req_satype)) == 0) { 7050 *errorp = EINVAL; 7051 return (NULL); 7052 } 7053 7054 /* count sav entries to be sent to userland. */ 7055 cnt = 0; 7056 LIST_FOREACH(sah, &sahtree, chain) { 7057 if (req_satype != SADB_SATYPE_UNSPEC && 7058 proto != sah->saidx.proto) 7059 continue; 7060 7061 for (stateidx = 0; 7062 stateidx < _ARRAYLEN(saorder_state_any); 7063 stateidx++) { 7064 state = saorder_state_any[stateidx]; 7065 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7066 cnt++; 7067 } 7068 } 7069 } 7070 7071 if (cnt == 0) { 7072 *errorp = ENOENT; 7073 return (NULL); 7074 } 7075 7076 /* send this to the userland, one at a time. */ 7077 m = NULL; 7078 prev = m; 7079 LIST_FOREACH(sah, &sahtree, chain) { 7080 if (req_satype != SADB_SATYPE_UNSPEC && 7081 proto != sah->saidx.proto) 7082 continue; 7083 7084 /* map proto to satype */ 7085 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7086 m_freem(m); 7087 *errorp = EINVAL; 7088 return (NULL); 7089 } 7090 7091 for (stateidx = 0; 7092 stateidx < _ARRAYLEN(saorder_state_any); 7093 stateidx++) { 7094 state = saorder_state_any[stateidx]; 7095 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7096 n = key_setdumpsa(sav, SADB_DUMP, satype, 7097 --cnt, pid); 7098 if (!n) { 7099 m_freem(m); 7100 *errorp = ENOBUFS; 7101 return (NULL); 7102 } 7103 7104 totlen += n->m_pkthdr.len; 7105 if (!m) 7106 m = n; 7107 else 7108 prev->m_nextpkt = n; 7109 prev = n; 7110 } 7111 } 7112 } 7113 7114 if (!m) { 7115 *errorp = EINVAL; 7116 return (NULL); 7117 } 7118 7119 if ((m->m_flags & M_PKTHDR) != 0) { 7120 m->m_pkthdr.len = 0; 7121 for (n = m; n; n = n->m_next) 7122 m->m_pkthdr.len += n->m_len; 7123 } 7124 7125 *errorp = 0; 7126 return (m); 7127 } 7128 7129 /* 7130 * SADB_DUMP processing 7131 * dump all entries including status of DEAD in SAD. 7132 * receive 7133 * <base> 7134 * from the ikmpd, and dump all secasvar leaves 7135 * and send, 7136 * <base> ..... 7137 * to the ikmpd. 7138 * 7139 * m will always be freed. 7140 */ 7141 static int 7142 key_dump(so, m0, mhp) 7143 struct socket *so; 7144 struct mbuf *m0; 7145 const struct sadb_msghdr *mhp; 7146 { 7147 u_int16_t proto; 7148 u_int8_t satype; 7149 struct mbuf *n; 7150 int s; 7151 int error, len, ok; 7152 7153 /* sanity check */ 7154 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL) 7155 panic("key_dump: NULL pointer is passed"); 7156 7157 /* map satype to proto */ 7158 satype = mhp->msg->sadb_msg_satype; 7159 if ((proto = key_satype2proto(satype)) == 0) { 7160 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n")); 7161 return key_senderror(so, m0, EINVAL); 7162 } 7163 7164 /* 7165 * If the requestor has insufficient socket-buffer space 7166 * for the entire chain, nobody gets any response to the DUMP. 7167 * XXX For now, only the requestor ever gets anything. 7168 * Moreover, if the requestor has any space at all, they receive 7169 * the entire chain, otherwise the request is refused with ENOBUFS. 7170 */ 7171 if (sbspace(&so->so_rcv) <= 0) { 7172 return key_senderror(so, m0, ENOBUFS); 7173 } 7174 7175 s = splsoftnet(); 7176 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7177 splx(s); 7178 7179 if (n == NULL) { 7180 return key_senderror(so, m0, ENOENT); 7181 } 7182 pfkeystat.in_total++; 7183 pfkeystat.in_bytes += len; 7184 7185 /* 7186 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7187 * The requestor receives either the entire chain, or an 7188 * error message with ENOBUFS. 7189 * 7190 * sbappendaddrchain() takes the chain of entries, one 7191 * packet-record per SPD entry, prepends the key_src sockaddr 7192 * to each packet-record, links the sockaddr mbufs into a new 7193 * list of records, then appends the entire resulting 7194 * list to the requesting socket. 7195 */ 7196 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, 7197 n, SB_PRIO_ONESHOT_OVERFLOW); 7198 7199 if (!ok) { 7200 pfkeystat.in_nomem++; 7201 m_freem(n); 7202 return key_senderror(so, m0, ENOBUFS); 7203 } 7204 7205 m_freem(m0); 7206 return 0; 7207 } 7208 7209 /* 7210 * SADB_X_PROMISC processing 7211 * 7212 * m will always be freed. 7213 */ 7214 static int 7215 key_promisc(so, m, mhp) 7216 struct socket *so; 7217 struct mbuf *m; 7218 const struct sadb_msghdr *mhp; 7219 { 7220 int olen; 7221 7222 /* sanity check */ 7223 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL) 7224 panic("key_promisc: NULL pointer is passed"); 7225 7226 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7227 7228 if (olen < sizeof(struct sadb_msg)) { 7229 #if 1 7230 return key_senderror(so, m, EINVAL); 7231 #else 7232 m_freem(m); 7233 return 0; 7234 #endif 7235 } else if (olen == sizeof(struct sadb_msg)) { 7236 /* enable/disable promisc mode */ 7237 struct keycb *kp; 7238 7239 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7240 return key_senderror(so, m, EINVAL); 7241 mhp->msg->sadb_msg_errno = 0; 7242 switch (mhp->msg->sadb_msg_satype) { 7243 case 0: 7244 case 1: 7245 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7246 break; 7247 default: 7248 return key_senderror(so, m, EINVAL); 7249 } 7250 7251 /* send the original message back to everyone */ 7252 mhp->msg->sadb_msg_errno = 0; 7253 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7254 } else { 7255 /* send packet as is */ 7256 7257 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7258 7259 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7260 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7261 } 7262 } 7263 7264 static int (*key_typesw[]) __P((struct socket *, struct mbuf *, 7265 const struct sadb_msghdr *)) = { 7266 NULL, /* SADB_RESERVED */ 7267 key_getspi, /* SADB_GETSPI */ 7268 key_update, /* SADB_UPDATE */ 7269 key_add, /* SADB_ADD */ 7270 key_delete, /* SADB_DELETE */ 7271 key_get, /* SADB_GET */ 7272 key_acquire2, /* SADB_ACQUIRE */ 7273 key_register, /* SADB_REGISTER */ 7274 NULL, /* SADB_EXPIRE */ 7275 key_flush, /* SADB_FLUSH */ 7276 key_dump, /* SADB_DUMP */ 7277 key_promisc, /* SADB_X_PROMISC */ 7278 NULL, /* SADB_X_PCHANGE */ 7279 key_spdadd, /* SADB_X_SPDUPDATE */ 7280 key_spdadd, /* SADB_X_SPDADD */ 7281 key_spddelete, /* SADB_X_SPDDELETE */ 7282 key_spdget, /* SADB_X_SPDGET */ 7283 NULL, /* SADB_X_SPDACQUIRE */ 7284 key_spddump, /* SADB_X_SPDDUMP */ 7285 key_spdflush, /* SADB_X_SPDFLUSH */ 7286 key_spdadd, /* SADB_X_SPDSETIDX */ 7287 NULL, /* SADB_X_SPDEXPIRE */ 7288 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7289 #ifdef IPSEC_NAT_T 7290 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7291 #endif 7292 }; 7293 7294 /* 7295 * parse sadb_msg buffer to process PFKEYv2, 7296 * and create a data to response if needed. 7297 * I think to be dealed with mbuf directly. 7298 * IN: 7299 * msgp : pointer to pointer to a received buffer pulluped. 7300 * This is rewrited to response. 7301 * so : pointer to socket. 7302 * OUT: 7303 * length for buffer to send to user process. 7304 */ 7305 int 7306 key_parse(m, so) 7307 struct mbuf *m; 7308 struct socket *so; 7309 { 7310 struct sadb_msg *msg; 7311 struct sadb_msghdr mh; 7312 u_int orglen; 7313 int error; 7314 int target; 7315 7316 /* sanity check */ 7317 if (m == NULL || so == NULL) 7318 panic("key_parse: NULL pointer is passed"); 7319 7320 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7321 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7322 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n")); 7323 kdebug_sadb(msg)); 7324 #endif 7325 7326 if (m->m_len < sizeof(struct sadb_msg)) { 7327 m = m_pullup(m, sizeof(struct sadb_msg)); 7328 if (!m) 7329 return ENOBUFS; 7330 } 7331 msg = mtod(m, struct sadb_msg *); 7332 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7333 target = KEY_SENDUP_ONE; 7334 7335 if ((m->m_flags & M_PKTHDR) == 0 || 7336 m->m_pkthdr.len != m->m_pkthdr.len) { 7337 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n")); 7338 pfkeystat.out_invlen++; 7339 error = EINVAL; 7340 goto senderror; 7341 } 7342 7343 if (msg->sadb_msg_version != PF_KEY_V2) { 7344 ipseclog((LOG_DEBUG, 7345 "key_parse: PF_KEY version %u is mismatched.\n", 7346 msg->sadb_msg_version)); 7347 pfkeystat.out_invver++; 7348 error = EINVAL; 7349 goto senderror; 7350 } 7351 7352 if (msg->sadb_msg_type > SADB_MAX) { 7353 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7354 msg->sadb_msg_type)); 7355 pfkeystat.out_invmsgtype++; 7356 error = EINVAL; 7357 goto senderror; 7358 } 7359 7360 /* for old-fashioned code - should be nuked */ 7361 if (m->m_pkthdr.len > MCLBYTES) { 7362 m_freem(m); 7363 return ENOBUFS; 7364 } 7365 if (m->m_next) { 7366 struct mbuf *n; 7367 7368 MGETHDR(n, M_DONTWAIT, MT_DATA); 7369 if (n && m->m_pkthdr.len > MHLEN) { 7370 MCLGET(n, M_DONTWAIT); 7371 if ((n->m_flags & M_EXT) == 0) { 7372 m_free(n); 7373 n = NULL; 7374 } 7375 } 7376 if (!n) { 7377 m_freem(m); 7378 return ENOBUFS; 7379 } 7380 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7381 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7382 n->m_next = NULL; 7383 m_freem(m); 7384 m = n; 7385 } 7386 7387 /* align the mbuf chain so that extensions are in contiguous region. */ 7388 error = key_align(m, &mh); 7389 if (error) 7390 return error; 7391 7392 if (m->m_next) { /*XXX*/ 7393 m_freem(m); 7394 return ENOBUFS; 7395 } 7396 7397 msg = mh.msg; 7398 7399 /* check SA type */ 7400 switch (msg->sadb_msg_satype) { 7401 case SADB_SATYPE_UNSPEC: 7402 switch (msg->sadb_msg_type) { 7403 case SADB_GETSPI: 7404 case SADB_UPDATE: 7405 case SADB_ADD: 7406 case SADB_DELETE: 7407 case SADB_GET: 7408 case SADB_ACQUIRE: 7409 case SADB_EXPIRE: 7410 ipseclog((LOG_DEBUG, "key_parse: must specify satype " 7411 "when msg type=%u.\n", msg->sadb_msg_type)); 7412 pfkeystat.out_invsatype++; 7413 error = EINVAL; 7414 goto senderror; 7415 } 7416 break; 7417 case SADB_SATYPE_AH: 7418 case SADB_SATYPE_ESP: 7419 case SADB_X_SATYPE_IPCOMP: 7420 case SADB_X_SATYPE_TCPSIGNATURE: 7421 switch (msg->sadb_msg_type) { 7422 case SADB_X_SPDADD: 7423 case SADB_X_SPDDELETE: 7424 case SADB_X_SPDGET: 7425 case SADB_X_SPDDUMP: 7426 case SADB_X_SPDFLUSH: 7427 case SADB_X_SPDSETIDX: 7428 case SADB_X_SPDUPDATE: 7429 case SADB_X_SPDDELETE2: 7430 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n", 7431 msg->sadb_msg_type)); 7432 pfkeystat.out_invsatype++; 7433 error = EINVAL; 7434 goto senderror; 7435 } 7436 break; 7437 case SADB_SATYPE_RSVP: 7438 case SADB_SATYPE_OSPFV2: 7439 case SADB_SATYPE_RIPV2: 7440 case SADB_SATYPE_MIP: 7441 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n", 7442 msg->sadb_msg_satype)); 7443 pfkeystat.out_invsatype++; 7444 error = EOPNOTSUPP; 7445 goto senderror; 7446 case 1: /* XXX: What does it do? */ 7447 if (msg->sadb_msg_type == SADB_X_PROMISC) 7448 break; 7449 /*FALLTHROUGH*/ 7450 default: 7451 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n", 7452 msg->sadb_msg_satype)); 7453 pfkeystat.out_invsatype++; 7454 error = EINVAL; 7455 goto senderror; 7456 } 7457 7458 /* check field of upper layer protocol and address family */ 7459 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7460 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7461 struct sadb_address *src0, *dst0; 7462 u_int plen; 7463 7464 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7465 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7466 7467 /* check upper layer protocol */ 7468 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7469 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n")); 7470 pfkeystat.out_invaddr++; 7471 error = EINVAL; 7472 goto senderror; 7473 } 7474 7475 /* check family */ 7476 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7477 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7478 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n")); 7479 pfkeystat.out_invaddr++; 7480 error = EINVAL; 7481 goto senderror; 7482 } 7483 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7484 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7485 ipseclog((LOG_DEBUG, 7486 "key_parse: address struct size mismatched.\n")); 7487 pfkeystat.out_invaddr++; 7488 error = EINVAL; 7489 goto senderror; 7490 } 7491 7492 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7493 case AF_INET: 7494 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7495 sizeof(struct sockaddr_in)) { 7496 pfkeystat.out_invaddr++; 7497 error = EINVAL; 7498 goto senderror; 7499 } 7500 break; 7501 case AF_INET6: 7502 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7503 sizeof(struct sockaddr_in6)) { 7504 pfkeystat.out_invaddr++; 7505 error = EINVAL; 7506 goto senderror; 7507 } 7508 break; 7509 default: 7510 ipseclog((LOG_DEBUG, 7511 "key_parse: unsupported address family.\n")); 7512 pfkeystat.out_invaddr++; 7513 error = EAFNOSUPPORT; 7514 goto senderror; 7515 } 7516 7517 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7518 case AF_INET: 7519 plen = sizeof(struct in_addr) << 3; 7520 break; 7521 case AF_INET6: 7522 plen = sizeof(struct in6_addr) << 3; 7523 break; 7524 default: 7525 plen = 0; /*fool gcc*/ 7526 break; 7527 } 7528 7529 /* check max prefix length */ 7530 if (src0->sadb_address_prefixlen > plen || 7531 dst0->sadb_address_prefixlen > plen) { 7532 ipseclog((LOG_DEBUG, 7533 "key_parse: illegal prefixlen.\n")); 7534 pfkeystat.out_invaddr++; 7535 error = EINVAL; 7536 goto senderror; 7537 } 7538 7539 /* 7540 * prefixlen == 0 is valid because there can be a case when 7541 * all addresses are matched. 7542 */ 7543 } 7544 7545 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7546 key_typesw[msg->sadb_msg_type] == NULL) { 7547 pfkeystat.out_invmsgtype++; 7548 error = EINVAL; 7549 goto senderror; 7550 } 7551 7552 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7553 7554 senderror: 7555 msg->sadb_msg_errno = error; 7556 return key_sendup_mbuf(so, m, target); 7557 } 7558 7559 static int 7560 key_senderror(so, m, code) 7561 struct socket *so; 7562 struct mbuf *m; 7563 int code; 7564 { 7565 struct sadb_msg *msg; 7566 7567 if (m->m_len < sizeof(struct sadb_msg)) 7568 panic("invalid mbuf passed to key_senderror"); 7569 7570 msg = mtod(m, struct sadb_msg *); 7571 msg->sadb_msg_errno = code; 7572 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7573 } 7574 7575 /* 7576 * set the pointer to each header into message buffer. 7577 * m will be freed on error. 7578 * XXX larger-than-MCLBYTES extension? 7579 */ 7580 static int 7581 key_align(m, mhp) 7582 struct mbuf *m; 7583 struct sadb_msghdr *mhp; 7584 { 7585 struct mbuf *n; 7586 struct sadb_ext *ext; 7587 size_t off, end; 7588 int extlen; 7589 int toff; 7590 7591 /* sanity check */ 7592 if (m == NULL || mhp == NULL) 7593 panic("key_align: NULL pointer is passed"); 7594 if (m->m_len < sizeof(struct sadb_msg)) 7595 panic("invalid mbuf passed to key_align"); 7596 7597 /* initialize */ 7598 bzero(mhp, sizeof(*mhp)); 7599 7600 mhp->msg = mtod(m, struct sadb_msg *); 7601 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7602 7603 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7604 extlen = end; /*just in case extlen is not updated*/ 7605 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7606 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7607 if (!n) { 7608 /* m is already freed */ 7609 return ENOBUFS; 7610 } 7611 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7612 7613 /* set pointer */ 7614 switch (ext->sadb_ext_type) { 7615 case SADB_EXT_SA: 7616 case SADB_EXT_ADDRESS_SRC: 7617 case SADB_EXT_ADDRESS_DST: 7618 case SADB_EXT_ADDRESS_PROXY: 7619 case SADB_EXT_LIFETIME_CURRENT: 7620 case SADB_EXT_LIFETIME_HARD: 7621 case SADB_EXT_LIFETIME_SOFT: 7622 case SADB_EXT_KEY_AUTH: 7623 case SADB_EXT_KEY_ENCRYPT: 7624 case SADB_EXT_IDENTITY_SRC: 7625 case SADB_EXT_IDENTITY_DST: 7626 case SADB_EXT_SENSITIVITY: 7627 case SADB_EXT_PROPOSAL: 7628 case SADB_EXT_SUPPORTED_AUTH: 7629 case SADB_EXT_SUPPORTED_ENCRYPT: 7630 case SADB_EXT_SPIRANGE: 7631 case SADB_X_EXT_POLICY: 7632 case SADB_X_EXT_SA2: 7633 #ifdef IPSEC_NAT_T 7634 case SADB_X_EXT_NAT_T_TYPE: 7635 case SADB_X_EXT_NAT_T_SPORT: 7636 case SADB_X_EXT_NAT_T_DPORT: 7637 case SADB_X_EXT_NAT_T_OA: 7638 case SADB_X_EXT_NAT_T_FRAG: 7639 #endif 7640 /* duplicate check */ 7641 /* 7642 * XXX Are there duplication payloads of either 7643 * KEY_AUTH or KEY_ENCRYPT ? 7644 */ 7645 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7646 ipseclog((LOG_DEBUG, 7647 "key_align: duplicate ext_type %u " 7648 "is passed.\n", ext->sadb_ext_type)); 7649 m_freem(m); 7650 pfkeystat.out_dupext++; 7651 return EINVAL; 7652 } 7653 break; 7654 default: 7655 ipseclog((LOG_DEBUG, 7656 "key_align: invalid ext_type %u is passed.\n", 7657 ext->sadb_ext_type)); 7658 m_freem(m); 7659 pfkeystat.out_invexttype++; 7660 return EINVAL; 7661 } 7662 7663 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7664 7665 if (key_validate_ext(ext, extlen)) { 7666 m_freem(m); 7667 pfkeystat.out_invlen++; 7668 return EINVAL; 7669 } 7670 7671 n = m_pulldown(m, off, extlen, &toff); 7672 if (!n) { 7673 /* m is already freed */ 7674 return ENOBUFS; 7675 } 7676 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7677 7678 mhp->ext[ext->sadb_ext_type] = ext; 7679 mhp->extoff[ext->sadb_ext_type] = off; 7680 mhp->extlen[ext->sadb_ext_type] = extlen; 7681 } 7682 7683 if (off != end) { 7684 m_freem(m); 7685 pfkeystat.out_invlen++; 7686 return EINVAL; 7687 } 7688 7689 return 0; 7690 } 7691 7692 static int 7693 key_validate_ext(ext, len) 7694 const struct sadb_ext *ext; 7695 int len; 7696 { 7697 const struct sockaddr *sa; 7698 enum { NONE, ADDR } checktype = NONE; 7699 int baselen = 0; 7700 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7701 7702 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7703 return EINVAL; 7704 7705 /* if it does not match minimum/maximum length, bail */ 7706 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7707 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7708 return EINVAL; 7709 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7710 return EINVAL; 7711 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7712 return EINVAL; 7713 7714 /* more checks based on sadb_ext_type XXX need more */ 7715 switch (ext->sadb_ext_type) { 7716 case SADB_EXT_ADDRESS_SRC: 7717 case SADB_EXT_ADDRESS_DST: 7718 case SADB_EXT_ADDRESS_PROXY: 7719 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7720 checktype = ADDR; 7721 break; 7722 case SADB_EXT_IDENTITY_SRC: 7723 case SADB_EXT_IDENTITY_DST: 7724 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7725 SADB_X_IDENTTYPE_ADDR) { 7726 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7727 checktype = ADDR; 7728 } else 7729 checktype = NONE; 7730 break; 7731 default: 7732 checktype = NONE; 7733 break; 7734 } 7735 7736 switch (checktype) { 7737 case NONE: 7738 break; 7739 case ADDR: 7740 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7741 if (len < baselen + sal) 7742 return EINVAL; 7743 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7744 return EINVAL; 7745 break; 7746 } 7747 7748 return 0; 7749 } 7750 7751 void 7752 key_init() 7753 { 7754 int i; 7755 7756 callout_init(&key_timehandler_ch); 7757 7758 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7759 LIST_INIT(&sptree[i]); 7760 } 7761 7762 LIST_INIT(&sahtree); 7763 7764 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7765 LIST_INIT(®tree[i]); 7766 } 7767 7768 #ifndef IPSEC_NONBLOCK_ACQUIRE 7769 LIST_INIT(&acqtree); 7770 #endif 7771 LIST_INIT(&spacqtree); 7772 7773 /* system default */ 7774 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7775 ip4_def_policy.refcnt++; /*never reclaim this*/ 7776 7777 #ifdef INET6 7778 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7779 ip6_def_policy.refcnt++; /*never reclaim this*/ 7780 #endif 7781 7782 7783 #ifndef IPSEC_DEBUG2 7784 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7785 #endif /*IPSEC_DEBUG2*/ 7786 7787 /* initialize key statistics */ 7788 keystat.getspi_count = 1; 7789 7790 printf("IPsec: Initialized Security Association Processing.\n"); 7791 7792 return; 7793 } 7794 7795 /* 7796 * XXX: maybe This function is called after INBOUND IPsec processing. 7797 * 7798 * Special check for tunnel-mode packets. 7799 * We must make some checks for consistency between inner and outer IP header. 7800 * 7801 * xxx more checks to be provided 7802 */ 7803 int 7804 key_checktunnelsanity( 7805 struct secasvar *sav, 7806 u_int family, 7807 void *src, 7808 void *dst 7809 ) 7810 { 7811 /* sanity check */ 7812 if (sav->sah == NULL) 7813 panic("sav->sah == NULL at key_checktunnelsanity"); 7814 7815 /* XXX: check inner IP header */ 7816 7817 return 1; 7818 } 7819 7820 #if 0 7821 #define hostnamelen strlen(hostname) 7822 7823 /* 7824 * Get FQDN for the host. 7825 * If the administrator configured hostname (by hostname(1)) without 7826 * domain name, returns nothing. 7827 */ 7828 static const char * 7829 key_getfqdn() 7830 { 7831 int i; 7832 int hasdot; 7833 static char fqdn[MAXHOSTNAMELEN + 1]; 7834 7835 if (!hostnamelen) 7836 return NULL; 7837 7838 /* check if it comes with domain name. */ 7839 hasdot = 0; 7840 for (i = 0; i < hostnamelen; i++) { 7841 if (hostname[i] == '.') 7842 hasdot++; 7843 } 7844 if (!hasdot) 7845 return NULL; 7846 7847 /* NOTE: hostname may not be NUL-terminated. */ 7848 bzero(fqdn, sizeof(fqdn)); 7849 bcopy(hostname, fqdn, hostnamelen); 7850 fqdn[hostnamelen] = '\0'; 7851 return fqdn; 7852 } 7853 7854 /* 7855 * get username@FQDN for the host/user. 7856 */ 7857 static const char * 7858 key_getuserfqdn() 7859 { 7860 const char *host; 7861 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7862 struct proc *p = curproc; 7863 char *q; 7864 7865 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7866 return NULL; 7867 if (!(host = key_getfqdn())) 7868 return NULL; 7869 7870 /* NOTE: s_login may not be-NUL terminated. */ 7871 bzero(userfqdn, sizeof(userfqdn)); 7872 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME); 7873 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7874 q = userfqdn + strlen(userfqdn); 7875 *q++ = '@'; 7876 bcopy(host, q, strlen(host)); 7877 q += strlen(host); 7878 *q++ = '\0'; 7879 7880 return userfqdn; 7881 } 7882 #endif 7883 7884 /* record data transfer on SA, and update timestamps */ 7885 void 7886 key_sa_recordxfer(sav, m) 7887 struct secasvar *sav; 7888 struct mbuf *m; 7889 { 7890 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar")); 7891 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf")); 7892 if (!sav->lft_c) 7893 return; 7894 7895 /* 7896 * XXX Currently, there is a difference of bytes size 7897 * between inbound and outbound processing. 7898 */ 7899 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7900 /* to check bytes lifetime is done in key_timehandler(). */ 7901 7902 /* 7903 * We use the number of packets as the unit of 7904 * sadb_lifetime_allocations. We increment the variable 7905 * whenever {esp,ah}_{in,out}put is called. 7906 */ 7907 sav->lft_c->sadb_lifetime_allocations++; 7908 /* XXX check for expires? */ 7909 7910 /* 7911 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7912 * in seconds. HARD and SOFT lifetime are measured by the time 7913 * difference (again in seconds) from sadb_lifetime_usetime. 7914 * 7915 * usetime 7916 * v expire expire 7917 * -----+-----+--------+---> t 7918 * <--------------> HARD 7919 * <-----> SOFT 7920 */ 7921 sav->lft_c->sadb_lifetime_usetime = time_second; 7922 /* XXX check for expires? */ 7923 7924 return; 7925 } 7926 7927 /* dumb version */ 7928 void 7929 key_sa_routechange(dst) 7930 struct sockaddr *dst; 7931 { 7932 struct secashead *sah; 7933 struct route *ro; 7934 7935 LIST_FOREACH(sah, &sahtree, chain) { 7936 ro = &sah->sa_route; 7937 if (dst->sa_len == rtcache_getdst(ro)->sa_len && 7938 memcmp(dst, rtcache_getdst(ro), dst->sa_len) == 0) 7939 rtcache_free(ro); 7940 } 7941 7942 return; 7943 } 7944 7945 static void 7946 key_sa_chgstate(sav, state) 7947 struct secasvar *sav; 7948 u_int8_t state; 7949 { 7950 if (sav == NULL) 7951 panic("key_sa_chgstate called with sav == NULL"); 7952 7953 if (sav->state == state) 7954 return; 7955 7956 if (__LIST_CHAINED(sav)) 7957 LIST_REMOVE(sav, chain); 7958 7959 sav->state = state; 7960 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7961 } 7962 7963 void 7964 key_sa_stir_iv(sav) 7965 struct secasvar *sav; 7966 { 7967 7968 if (!sav->iv) 7969 panic("key_sa_stir_iv called with sav == NULL"); 7970 key_randomfill(sav->iv, sav->ivlen); 7971 } 7972 7973 /* XXX too much? */ 7974 static struct mbuf * 7975 key_alloc_mbuf(l) 7976 int l; 7977 { 7978 struct mbuf *m = NULL, *n; 7979 int len, t; 7980 7981 len = l; 7982 while (len > 0) { 7983 MGET(n, M_DONTWAIT, MT_DATA); 7984 if (n && len > MLEN) 7985 MCLGET(n, M_DONTWAIT); 7986 if (!n) { 7987 m_freem(m); 7988 return NULL; 7989 } 7990 7991 n->m_next = NULL; 7992 n->m_len = 0; 7993 n->m_len = M_TRAILINGSPACE(n); 7994 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7995 if (n->m_len > len) { 7996 t = (n->m_len - len) & ~(sizeof(long) - 1); 7997 n->m_data += t; 7998 n->m_len = len; 7999 } 8000 8001 len -= n->m_len; 8002 8003 if (m) 8004 m_cat(m, n); 8005 else 8006 m = n; 8007 } 8008 8009 return m; 8010 } 8011 8012 static struct mbuf * 8013 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 8014 { 8015 struct secashead *sah; 8016 struct secasvar *sav; 8017 u_int16_t proto; 8018 u_int stateidx; 8019 u_int8_t satype; 8020 u_int8_t state; 8021 int cnt; 8022 struct mbuf *m, *n; 8023 8024 /* map satype to proto */ 8025 if ((proto = key_satype2proto(req_satype)) == 0) { 8026 *errorp = EINVAL; 8027 return (NULL); 8028 } 8029 8030 /* count sav entries to be sent to the userland. */ 8031 cnt = 0; 8032 LIST_FOREACH(sah, &sahtree, chain) { 8033 if (req_satype != SADB_SATYPE_UNSPEC && 8034 proto != sah->saidx.proto) 8035 continue; 8036 8037 for (stateidx = 0; 8038 stateidx < _ARRAYLEN(saorder_state_any); 8039 stateidx++) { 8040 state = saorder_state_any[stateidx]; 8041 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8042 cnt++; 8043 } 8044 } 8045 } 8046 8047 if (cnt == 0) { 8048 *errorp = ENOENT; 8049 return (NULL); 8050 } 8051 8052 /* send this to the userland, one at a time. */ 8053 m = NULL; 8054 LIST_FOREACH(sah, &sahtree, chain) { 8055 if (req_satype != SADB_SATYPE_UNSPEC && 8056 proto != sah->saidx.proto) 8057 continue; 8058 8059 /* map proto to satype */ 8060 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 8061 m_freem(m); 8062 *errorp = EINVAL; 8063 return (NULL); 8064 } 8065 8066 for (stateidx = 0; 8067 stateidx < _ARRAYLEN(saorder_state_any); 8068 stateidx++) { 8069 state = saorder_state_any[stateidx]; 8070 LIST_FOREACH(sav, &sah->savtree[state], chain) { 8071 n = key_setdumpsa(sav, SADB_DUMP, satype, 8072 --cnt, pid); 8073 if (!n) { 8074 m_freem(m); 8075 *errorp = ENOBUFS; 8076 return (NULL); 8077 } 8078 8079 if (!m) 8080 m = n; 8081 else 8082 m_cat(m, n); 8083 } 8084 } 8085 } 8086 8087 if (!m) { 8088 *errorp = EINVAL; 8089 return (NULL); 8090 } 8091 8092 if ((m->m_flags & M_PKTHDR) != 0) { 8093 m->m_pkthdr.len = 0; 8094 for (n = m; n; n = n->m_next) 8095 m->m_pkthdr.len += n->m_len; 8096 } 8097 8098 *errorp = 0; 8099 return (m); 8100 } 8101 8102 static struct mbuf * 8103 key_setspddump(int *errorp, pid_t pid) 8104 { 8105 struct secpolicy *sp; 8106 int cnt; 8107 u_int dir; 8108 struct mbuf *m, *n; 8109 8110 /* search SPD entry and get buffer size. */ 8111 cnt = 0; 8112 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8113 LIST_FOREACH(sp, &sptree[dir], chain) { 8114 cnt++; 8115 } 8116 } 8117 8118 if (cnt == 0) { 8119 *errorp = ENOENT; 8120 return (NULL); 8121 } 8122 8123 m = NULL; 8124 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8125 LIST_FOREACH(sp, &sptree[dir], chain) { 8126 --cnt; 8127 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8128 8129 if (!n) { 8130 *errorp = ENOBUFS; 8131 m_freem(m); 8132 return (NULL); 8133 } 8134 if (!m) 8135 m = n; 8136 else { 8137 m->m_pkthdr.len += n->m_pkthdr.len; 8138 m_cat(m, n); 8139 } 8140 } 8141 } 8142 8143 *errorp = 0; 8144 return (m); 8145 } 8146 8147 static int 8148 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8149 { 8150 struct mbuf *m, *n; 8151 int err2 = 0; 8152 char *p, *ep; 8153 size_t len; 8154 int s, error; 8155 8156 if (newp) 8157 return (EPERM); 8158 if (namelen != 1) 8159 return (EINVAL); 8160 8161 s = splsoftnet(); 8162 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8163 splx(s); 8164 if (!m) 8165 return (error); 8166 if (!oldp) 8167 *oldlenp = m->m_pkthdr.len; 8168 else { 8169 p = oldp; 8170 if (*oldlenp < m->m_pkthdr.len) { 8171 err2 = ENOMEM; 8172 ep = p + *oldlenp; 8173 } else { 8174 *oldlenp = m->m_pkthdr.len; 8175 ep = p + m->m_pkthdr.len; 8176 } 8177 for (n = m; n; n = n->m_next) { 8178 len = (ep - p < n->m_len) ? 8179 ep - p : n->m_len; 8180 error = copyout(mtod(n, const void *), p, len); 8181 p += len; 8182 if (error) 8183 break; 8184 } 8185 if (error == 0) 8186 error = err2; 8187 } 8188 m_freem(m); 8189 8190 return (error); 8191 } 8192 8193 static int 8194 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8195 { 8196 struct mbuf *m, *n; 8197 int err2 = 0; 8198 char *p, *ep; 8199 size_t len; 8200 int s, error; 8201 8202 if (newp) 8203 return (EPERM); 8204 if (namelen != 0) 8205 return (EINVAL); 8206 8207 s = splsoftnet(); 8208 m = key_setspddump(&error, l->l_proc->p_pid); 8209 splx(s); 8210 if (!m) 8211 return (error); 8212 if (!oldp) 8213 *oldlenp = m->m_pkthdr.len; 8214 else { 8215 p = oldp; 8216 if (*oldlenp < m->m_pkthdr.len) { 8217 err2 = ENOMEM; 8218 ep = p + *oldlenp; 8219 } else { 8220 *oldlenp = m->m_pkthdr.len; 8221 ep = p + m->m_pkthdr.len; 8222 } 8223 for (n = m; n; n = n->m_next) { 8224 len = (ep - p < n->m_len) ? 8225 ep - p : n->m_len; 8226 error = copyout(mtod(n, const void *), p, len); 8227 p += len; 8228 if (error) 8229 break; 8230 } 8231 if (error == 0) 8232 error = err2; 8233 } 8234 m_freem(m); 8235 8236 return (error); 8237 } 8238 8239 /* 8240 * Create sysctl tree for native FAST_IPSEC key knobs, originally 8241 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8242 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8243 * and in any case the part of our sysctl namespace used for dumping the 8244 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8245 * namespace, for API reasons. 8246 * 8247 * Pending a consensus on the right way to fix this, add a level of 8248 * indirection in how we number the `native' FAST_IPSEC key nodes; 8249 * and (as requested by Andrew Brown) move registration of the 8250 * KAME-compatible names to a separate function. 8251 */ 8252 #if 0 8253 # define FAST_IPSEC_PFKEY PF_KEY_V2 8254 # define FAST_IPSEC_PFKEY_NAME "keyv2" 8255 #else 8256 # define FAST_IPSEC_PFKEY PF_KEY 8257 # define FAST_IPSEC_PFKEY_NAME "key" 8258 #endif 8259 8260 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup") 8261 { 8262 8263 sysctl_createv(clog, 0, NULL, NULL, 8264 CTLFLAG_PERMANENT, 8265 CTLTYPE_NODE, "net", NULL, 8266 NULL, 0, NULL, 0, 8267 CTL_NET, CTL_EOL); 8268 sysctl_createv(clog, 0, NULL, NULL, 8269 CTLFLAG_PERMANENT, 8270 CTLTYPE_NODE, FAST_IPSEC_PFKEY_NAME, NULL, 8271 NULL, 0, NULL, 0, 8272 CTL_NET, FAST_IPSEC_PFKEY, CTL_EOL); 8273 8274 sysctl_createv(clog, 0, NULL, NULL, 8275 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8276 CTLTYPE_INT, "debug", NULL, 8277 NULL, 0, &key_debug_level, 0, 8278 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8279 sysctl_createv(clog, 0, NULL, NULL, 8280 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8281 CTLTYPE_INT, "spi_try", NULL, 8282 NULL, 0, &key_spi_trycnt, 0, 8283 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8284 sysctl_createv(clog, 0, NULL, NULL, 8285 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8286 CTLTYPE_INT, "spi_min_value", NULL, 8287 NULL, 0, &key_spi_minval, 0, 8288 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8289 sysctl_createv(clog, 0, NULL, NULL, 8290 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8291 CTLTYPE_INT, "spi_max_value", NULL, 8292 NULL, 0, &key_spi_maxval, 0, 8293 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8294 sysctl_createv(clog, 0, NULL, NULL, 8295 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8296 CTLTYPE_INT, "random_int", NULL, 8297 NULL, 0, &key_int_random, 0, 8298 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8299 sysctl_createv(clog, 0, NULL, NULL, 8300 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8301 CTLTYPE_INT, "larval_lifetime", NULL, 8302 NULL, 0, &key_larval_lifetime, 0, 8303 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8304 sysctl_createv(clog, 0, NULL, NULL, 8305 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8306 CTLTYPE_INT, "blockacq_count", NULL, 8307 NULL, 0, &key_blockacq_count, 0, 8308 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8309 sysctl_createv(clog, 0, NULL, NULL, 8310 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8311 CTLTYPE_INT, "blockacq_lifetime", NULL, 8312 NULL, 0, &key_blockacq_lifetime, 0, 8313 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8314 sysctl_createv(clog, 0, NULL, NULL, 8315 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8316 CTLTYPE_INT, "esp_keymin", NULL, 8317 NULL, 0, &ipsec_esp_keymin, 0, 8318 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8319 sysctl_createv(clog, 0, NULL, NULL, 8320 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8321 CTLTYPE_INT, "prefered_oldsa", NULL, 8322 NULL, 0, &key_prefered_oldsa, 0, 8323 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8324 sysctl_createv(clog, 0, NULL, NULL, 8325 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8326 CTLTYPE_INT, "esp_auth", NULL, 8327 NULL, 0, &ipsec_esp_auth, 0, 8328 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8329 sysctl_createv(clog, 0, NULL, NULL, 8330 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8331 CTLTYPE_INT, "ah_keymin", NULL, 8332 NULL, 0, &ipsec_ah_keymin, 0, 8333 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8334 } 8335 8336 /* 8337 * Register sysctl names used by setkey(8). For historical reasons, 8338 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8339 * for both FAST_IPSEC and KAME IPSEC. 8340 */ 8341 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for FAST_IPSEC") 8342 { 8343 8344 /* Make sure net.key exists before we register nodes underneath it. */ 8345 sysctl_createv(clog, 0, NULL, NULL, 8346 CTLFLAG_PERMANENT, 8347 CTLTYPE_NODE, "net", NULL, 8348 NULL, 0, NULL, 0, 8349 CTL_NET, CTL_EOL); 8350 sysctl_createv(clog, 0, NULL, NULL, 8351 CTLFLAG_PERMANENT, 8352 CTLTYPE_NODE, "key", NULL, 8353 NULL, 0, NULL, 0, 8354 CTL_NET, PF_KEY, CTL_EOL); 8355 8356 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8357 sysctl_createv(clog, 0, NULL, NULL, 8358 CTLFLAG_PERMANENT, 8359 CTLTYPE_STRUCT, "dumpsa", NULL, 8360 sysctl_net_key_dumpsa, 0, NULL, 0, 8361 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8362 sysctl_createv(clog, 0, NULL, NULL, 8363 CTLFLAG_PERMANENT, 8364 CTLTYPE_STRUCT, "dumpsp", NULL, 8365 sysctl_net_key_dumpsp, 0, NULL, 0, 8366 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8367 } 8368
Indexes created Tue Sep 23 02:09:52 GMT 2025