key.c revision 220206
1/* $FreeBSD: head/sys/netipsec/key.c 220206 2011-03-31 15:23:32Z fabient $ */ 2/* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 3 4/*- 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33/* 34 * This code is referd to RFC 2367 35 */ 36 37#include "opt_inet.h" 38#include "opt_inet6.h" 39#include "opt_ipsec.h" 40 41#include <sys/types.h> 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/kernel.h> 45#include <sys/lock.h> 46#include <sys/mutex.h> 47#include <sys/mbuf.h> 48#include <sys/domain.h> 49#include <sys/protosw.h> 50#include <sys/malloc.h> 51#include <sys/socket.h> 52#include <sys/socketvar.h> 53#include <sys/sysctl.h> 54#include <sys/errno.h> 55#include <sys/proc.h> 56#include <sys/queue.h> 57#include <sys/refcount.h> 58#include <sys/syslog.h> 59 60#include <net/if.h> 61#include <net/route.h> 62#include <net/raw_cb.h> 63#include <net/vnet.h> 64 65#include <netinet/in.h> 66#include <netinet/in_systm.h> 67#include <netinet/ip.h> 68#include <netinet/in_var.h> 69 70#ifdef INET6 71#include <netinet/ip6.h> 72#include <netinet6/in6_var.h> 73#include <netinet6/ip6_var.h> 74#endif /* INET6 */ 75 76#ifdef INET 77#include <netinet/in_pcb.h> 78#endif 79#ifdef INET6 80#include <netinet6/in6_pcb.h> 81#endif /* INET6 */ 82 83#include <net/pfkeyv2.h> 84#include <netipsec/keydb.h> 85#include <netipsec/key.h> 86#include <netipsec/keysock.h> 87#include <netipsec/key_debug.h> 88 89#include <netipsec/ipsec.h> 90#ifdef INET6 91#include <netipsec/ipsec6.h> 92#endif 93 94#include <netipsec/xform.h> 95 96#include <machine/stdarg.h> 97 98/* randomness */ 99#include <sys/random.h> 100 101#define FULLMASK 0xff 102#define _BITS(bytes) ((bytes) << 3) 103 104/* 105 * Note on SA reference counting: 106 * - SAs that are not in DEAD state will have (total external reference + 1) 107 * following value in reference count field. they cannot be freed and are 108 * referenced from SA header. 109 * - SAs that are in DEAD state will have (total external reference) 110 * in reference count field. they are ready to be freed. reference from 111 * SA header will be removed in key_delsav(), when the reference count 112 * field hits 0 (= no external reference other than from SA header. 113 */ 114 115VNET_DEFINE(u_int32_t, key_debug_level) = 0; 116static VNET_DEFINE(u_int, key_spi_trycnt) = 1000; 117static VNET_DEFINE(u_int32_t, key_spi_minval) = 0x100; 118static VNET_DEFINE(u_int32_t, key_spi_maxval) = 0x0fffffff; /* XXX */ 119static VNET_DEFINE(u_int32_t, policy_id) = 0; 120/*interval to initialize randseed,1(m)*/ 121static VNET_DEFINE(u_int, key_int_random) = 60; 122/* interval to expire acquiring, 30(s)*/ 123static VNET_DEFINE(u_int, key_larval_lifetime) = 30; 124/* counter for blocking SADB_ACQUIRE.*/ 125static VNET_DEFINE(int, key_blockacq_count) = 10; 126/* lifetime for blocking SADB_ACQUIRE.*/ 127static VNET_DEFINE(int, key_blockacq_lifetime) = 20; 128/* preferred old sa rather than new sa.*/ 129static VNET_DEFINE(int, key_preferred_oldsa) = 1; 130#define V_key_spi_trycnt VNET(key_spi_trycnt) 131#define V_key_spi_minval VNET(key_spi_minval) 132#define V_key_spi_maxval VNET(key_spi_maxval) 133#define V_policy_id VNET(policy_id) 134#define V_key_int_random VNET(key_int_random) 135#define V_key_larval_lifetime VNET(key_larval_lifetime) 136#define V_key_blockacq_count VNET(key_blockacq_count) 137#define V_key_blockacq_lifetime VNET(key_blockacq_lifetime) 138#define V_key_preferred_oldsa VNET(key_preferred_oldsa) 139 140static VNET_DEFINE(u_int32_t, acq_seq) = 0; 141#define V_acq_seq VNET(acq_seq) 142 143 /* SPD */ 144static VNET_DEFINE(LIST_HEAD(_sptree, secpolicy), sptree[IPSEC_DIR_MAX]); 145#define V_sptree VNET(sptree) 146static struct mtx sptree_lock; 147#define SPTREE_LOCK_INIT() \ 148 mtx_init(&sptree_lock, "sptree", \ 149 "fast ipsec security policy database", MTX_DEF) 150#define SPTREE_LOCK_DESTROY() mtx_destroy(&sptree_lock) 151#define SPTREE_LOCK() mtx_lock(&sptree_lock) 152#define SPTREE_UNLOCK() mtx_unlock(&sptree_lock) 153#define SPTREE_LOCK_ASSERT() mtx_assert(&sptree_lock, MA_OWNED) 154 155static VNET_DEFINE(LIST_HEAD(_sahtree, secashead), sahtree); /* SAD */ 156#define V_sahtree VNET(sahtree) 157static struct mtx sahtree_lock; 158#define SAHTREE_LOCK_INIT() \ 159 mtx_init(&sahtree_lock, "sahtree", \ 160 "fast ipsec security association database", MTX_DEF) 161#define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock) 162#define SAHTREE_LOCK() mtx_lock(&sahtree_lock) 163#define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock) 164#define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED) 165 166 /* registed list */ 167static VNET_DEFINE(LIST_HEAD(_regtree, secreg), regtree[SADB_SATYPE_MAX + 1]); 168#define V_regtree VNET(regtree) 169static struct mtx regtree_lock; 170#define REGTREE_LOCK_INIT() \ 171 mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF) 172#define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock) 173#define REGTREE_LOCK() mtx_lock(®tree_lock) 174#define REGTREE_UNLOCK() mtx_unlock(®tree_lock) 175#define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED) 176 177static VNET_DEFINE(LIST_HEAD(_acqtree, secacq), acqtree); /* acquiring list */ 178#define V_acqtree VNET(acqtree) 179static struct mtx acq_lock; 180#define ACQ_LOCK_INIT() \ 181 mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF) 182#define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock) 183#define ACQ_LOCK() mtx_lock(&acq_lock) 184#define ACQ_UNLOCK() mtx_unlock(&acq_lock) 185#define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED) 186 187 /* SP acquiring list */ 188static VNET_DEFINE(LIST_HEAD(_spacqtree, secspacq), spacqtree); 189#define V_spacqtree VNET(spacqtree) 190static struct mtx spacq_lock; 191#define SPACQ_LOCK_INIT() \ 192 mtx_init(&spacq_lock, "spacqtree", \ 193 "fast ipsec security policy acquire list", MTX_DEF) 194#define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock) 195#define SPACQ_LOCK() mtx_lock(&spacq_lock) 196#define SPACQ_UNLOCK() mtx_unlock(&spacq_lock) 197#define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED) 198 199/* search order for SAs */ 200static const u_int saorder_state_valid_prefer_old[] = { 201 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 202}; 203static const u_int saorder_state_valid_prefer_new[] = { 204 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 205}; 206static const u_int saorder_state_alive[] = { 207 /* except DEAD */ 208 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 209}; 210static const u_int saorder_state_any[] = { 211 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 212 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 213}; 214 215static const int minsize[] = { 216 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 217 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 218 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 219 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 220 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 221 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 222 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 223 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 224 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 225 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 226 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 227 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 228 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 229 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 230 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 231 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 232 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 233 0, /* SADB_X_EXT_KMPRIVATE */ 234 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 235 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 236 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */ 237 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */ 238 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */ 239 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 240 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 241 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ 242}; 243static const int maxsize[] = { 244 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 245 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 246 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 247 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 248 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 249 0, /* SADB_EXT_ADDRESS_SRC */ 250 0, /* SADB_EXT_ADDRESS_DST */ 251 0, /* SADB_EXT_ADDRESS_PROXY */ 252 0, /* SADB_EXT_KEY_AUTH */ 253 0, /* SADB_EXT_KEY_ENCRYPT */ 254 0, /* SADB_EXT_IDENTITY_SRC */ 255 0, /* SADB_EXT_IDENTITY_DST */ 256 0, /* SADB_EXT_SENSITIVITY */ 257 0, /* SADB_EXT_PROPOSAL */ 258 0, /* SADB_EXT_SUPPORTED_AUTH */ 259 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 260 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 261 0, /* SADB_X_EXT_KMPRIVATE */ 262 0, /* SADB_X_EXT_POLICY */ 263 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 264 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */ 265 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */ 266 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */ 267 0, /* SADB_X_EXT_NAT_T_OAI */ 268 0, /* SADB_X_EXT_NAT_T_OAR */ 269 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ 270}; 271 272static VNET_DEFINE(int, ipsec_esp_keymin) = 256; 273static VNET_DEFINE(int, ipsec_esp_auth) = 0; 274static VNET_DEFINE(int, ipsec_ah_keymin) = 128; 275 276#define V_ipsec_esp_keymin VNET(ipsec_esp_keymin) 277#define V_ipsec_esp_auth VNET(ipsec_esp_auth) 278#define V_ipsec_ah_keymin VNET(ipsec_ah_keymin) 279 280#ifdef SYSCTL_DECL 281SYSCTL_DECL(_net_key); 282#endif 283 284SYSCTL_VNET_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, 285 CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, ""); 286 287/* max count of trial for the decision of spi value */ 288SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, 289 CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, ""); 290 291/* minimum spi value to allocate automatically. */ 292SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MIN_VALUE, 293 spi_minval, CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, ""); 294 295/* maximun spi value to allocate automatically. */ 296SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MAX_VALUE, 297 spi_maxval, CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, ""); 298 299/* interval to initialize randseed */ 300SYSCTL_VNET_INT(_net_key, KEYCTL_RANDOM_INT, 301 int_random, CTLFLAG_RW, &VNET_NAME(key_int_random), 0, ""); 302 303/* lifetime for larval SA */ 304SYSCTL_VNET_INT(_net_key, KEYCTL_LARVAL_LIFETIME, 305 larval_lifetime, CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, ""); 306 307/* counter for blocking to send SADB_ACQUIRE to IKEd */ 308SYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, 309 blockacq_count, CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, ""); 310 311/* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 312SYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, 313 blockacq_lifetime, CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, ""); 314 315/* ESP auth */ 316SYSCTL_VNET_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, 317 CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, ""); 318 319/* minimum ESP key length */ 320SYSCTL_VNET_INT(_net_key, KEYCTL_ESP_KEYMIN, 321 esp_keymin, CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, ""); 322 323/* minimum AH key length */ 324SYSCTL_VNET_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, 325 CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, ""); 326 327/* perfered old SA rather than new SA */ 328SYSCTL_VNET_INT(_net_key, KEYCTL_PREFERED_OLDSA, 329 preferred_oldsa, CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, ""); 330 331#define __LIST_CHAINED(elm) \ 332 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 333#define LIST_INSERT_TAIL(head, elm, type, field) \ 334do {\ 335 struct type *curelm = LIST_FIRST(head); \ 336 if (curelm == NULL) {\ 337 LIST_INSERT_HEAD(head, elm, field); \ 338 } else { \ 339 while (LIST_NEXT(curelm, field)) \ 340 curelm = LIST_NEXT(curelm, field);\ 341 LIST_INSERT_AFTER(curelm, elm, field);\ 342 }\ 343} while (0) 344 345#define KEY_CHKSASTATE(head, sav, name) \ 346do { \ 347 if ((head) != (sav)) { \ 348 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 349 (name), (head), (sav))); \ 350 continue; \ 351 } \ 352} while (0) 353 354#define KEY_CHKSPDIR(head, sp, name) \ 355do { \ 356 if ((head) != (sp)) { \ 357 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 358 "anyway continue.\n", \ 359 (name), (head), (sp))); \ 360 } \ 361} while (0) 362 363MALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association"); 364MALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head"); 365MALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy"); 366MALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request"); 367MALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous"); 368MALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire"); 369MALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire"); 370 371/* 372 * set parameters into secpolicyindex buffer. 373 * Must allocate secpolicyindex buffer passed to this function. 374 */ 375#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 376do { \ 377 bzero((idx), sizeof(struct secpolicyindex)); \ 378 (idx)->dir = (_dir); \ 379 (idx)->prefs = (ps); \ 380 (idx)->prefd = (pd); \ 381 (idx)->ul_proto = (ulp); \ 382 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 383 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 384} while (0) 385 386/* 387 * set parameters into secasindex buffer. 388 * Must allocate secasindex buffer before calling this function. 389 */ 390#define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 391do { \ 392 bzero((idx), sizeof(struct secasindex)); \ 393 (idx)->proto = (p); \ 394 (idx)->mode = (m); \ 395 (idx)->reqid = (r); \ 396 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 397 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 398} while (0) 399 400/* key statistics */ 401struct _keystat { 402 u_long getspi_count; /* the avarage of count to try to get new SPI */ 403} keystat; 404 405struct sadb_msghdr { 406 struct sadb_msg *msg; 407 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 408 int extoff[SADB_EXT_MAX + 1]; 409 int extlen[SADB_EXT_MAX + 1]; 410}; 411 412static struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 413static void key_freesp_so __P((struct secpolicy **)); 414static struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 415static void key_delsp __P((struct secpolicy *)); 416static struct secpolicy *key_getsp __P((struct secpolicyindex *)); 417static void _key_delsp(struct secpolicy *sp); 418static struct secpolicy *key_getspbyid __P((u_int32_t)); 419static u_int32_t key_newreqid __P((void)); 420static struct mbuf *key_gather_mbuf __P((struct mbuf *, 421 const struct sadb_msghdr *, int, int, ...)); 422static int key_spdadd __P((struct socket *, struct mbuf *, 423 const struct sadb_msghdr *)); 424static u_int32_t key_getnewspid __P((void)); 425static int key_spddelete __P((struct socket *, struct mbuf *, 426 const struct sadb_msghdr *)); 427static int key_spddelete2 __P((struct socket *, struct mbuf *, 428 const struct sadb_msghdr *)); 429static int key_spdget __P((struct socket *, struct mbuf *, 430 const struct sadb_msghdr *)); 431static int key_spdflush __P((struct socket *, struct mbuf *, 432 const struct sadb_msghdr *)); 433static int key_spddump __P((struct socket *, struct mbuf *, 434 const struct sadb_msghdr *)); 435static struct mbuf *key_setdumpsp __P((struct secpolicy *, 436 u_int8_t, u_int32_t, u_int32_t)); 437static u_int key_getspreqmsglen __P((struct secpolicy *)); 438static int key_spdexpire __P((struct secpolicy *)); 439static struct secashead *key_newsah __P((struct secasindex *)); 440static void key_delsah __P((struct secashead *)); 441static struct secasvar *key_newsav __P((struct mbuf *, 442 const struct sadb_msghdr *, struct secashead *, int *, 443 const char*, int)); 444#define KEY_NEWSAV(m, sadb, sah, e) \ 445 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 446static void key_delsav __P((struct secasvar *)); 447static struct secashead *key_getsah __P((struct secasindex *)); 448static struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 449static struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 450static int key_setsaval __P((struct secasvar *, struct mbuf *, 451 const struct sadb_msghdr *)); 452static int key_mature __P((struct secasvar *)); 453static struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 454 u_int8_t, u_int32_t, u_int32_t)); 455static struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 456 u_int32_t, pid_t, u_int16_t)); 457static struct mbuf *key_setsadbsa __P((struct secasvar *)); 458static struct mbuf *key_setsadbaddr __P((u_int16_t, 459 const struct sockaddr *, u_int8_t, u_int16_t)); 460#ifdef IPSEC_NAT_T 461static struct mbuf *key_setsadbxport(u_int16_t, u_int16_t); 462static struct mbuf *key_setsadbxtype(u_int16_t); 463#endif 464static void key_porttosaddr(struct sockaddr *, u_int16_t); 465#define KEY_PORTTOSADDR(saddr, port) \ 466 key_porttosaddr((struct sockaddr *)(saddr), (port)) 467static struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); 468static struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 469 u_int32_t)); 470static struct seckey *key_dup_keymsg(const struct sadb_key *, u_int, 471 struct malloc_type *); 472static struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src, 473 struct malloc_type *type); 474#ifdef INET6 475static int key_ismyaddr6 __P((struct sockaddr_in6 *)); 476#endif 477 478/* flags for key_cmpsaidx() */ 479#define CMP_HEAD 1 /* protocol, addresses. */ 480#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 481#define CMP_REQID 3 /* additionally HEAD, reaid. */ 482#define CMP_EXACTLY 4 /* all elements. */ 483static int key_cmpsaidx 484 __P((const struct secasindex *, const struct secasindex *, int)); 485 486static int key_cmpspidx_exactly 487 __P((struct secpolicyindex *, struct secpolicyindex *)); 488static int key_cmpspidx_withmask 489 __P((struct secpolicyindex *, struct secpolicyindex *)); 490static int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 491static int key_bbcmp __P((const void *, const void *, u_int)); 492static u_int16_t key_satype2proto __P((u_int8_t)); 493static u_int8_t key_proto2satype __P((u_int16_t)); 494 495static int key_getspi __P((struct socket *, struct mbuf *, 496 const struct sadb_msghdr *)); 497static u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 498 struct secasindex *)); 499static int key_update __P((struct socket *, struct mbuf *, 500 const struct sadb_msghdr *)); 501#ifdef IPSEC_DOSEQCHECK 502static struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 503#endif 504static int key_add __P((struct socket *, struct mbuf *, 505 const struct sadb_msghdr *)); 506static int key_setident __P((struct secashead *, struct mbuf *, 507 const struct sadb_msghdr *)); 508static struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 509 const struct sadb_msghdr *)); 510static int key_delete __P((struct socket *, struct mbuf *, 511 const struct sadb_msghdr *)); 512static int key_get __P((struct socket *, struct mbuf *, 513 const struct sadb_msghdr *)); 514 515static void key_getcomb_setlifetime __P((struct sadb_comb *)); 516static struct mbuf *key_getcomb_esp __P((void)); 517static struct mbuf *key_getcomb_ah __P((void)); 518static struct mbuf *key_getcomb_ipcomp __P((void)); 519static struct mbuf *key_getprop __P((const struct secasindex *)); 520 521static int key_acquire __P((const struct secasindex *, struct secpolicy *)); 522static struct secacq *key_newacq __P((const struct secasindex *)); 523static struct secacq *key_getacq __P((const struct secasindex *)); 524static struct secacq *key_getacqbyseq __P((u_int32_t)); 525static struct secspacq *key_newspacq __P((struct secpolicyindex *)); 526static struct secspacq *key_getspacq __P((struct secpolicyindex *)); 527static int key_acquire2 __P((struct socket *, struct mbuf *, 528 const struct sadb_msghdr *)); 529static int key_register __P((struct socket *, struct mbuf *, 530 const struct sadb_msghdr *)); 531static int key_expire __P((struct secasvar *)); 532static int key_flush __P((struct socket *, struct mbuf *, 533 const struct sadb_msghdr *)); 534static int key_dump __P((struct socket *, struct mbuf *, 535 const struct sadb_msghdr *)); 536static int key_promisc __P((struct socket *, struct mbuf *, 537 const struct sadb_msghdr *)); 538static int key_senderror __P((struct socket *, struct mbuf *, int)); 539static int key_validate_ext __P((const struct sadb_ext *, int)); 540static int key_align __P((struct mbuf *, struct sadb_msghdr *)); 541static struct mbuf *key_setlifetime(struct seclifetime *src, 542 u_int16_t exttype); 543static struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype); 544 545#if 0 546static const char *key_getfqdn __P((void)); 547static const char *key_getuserfqdn __P((void)); 548#endif 549static void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 550static struct mbuf *key_alloc_mbuf __P((int)); 551 552static __inline void 553sa_initref(struct secasvar *sav) 554{ 555 556 refcount_init(&sav->refcnt, 1); 557} 558static __inline void 559sa_addref(struct secasvar *sav) 560{ 561 562 refcount_acquire(&sav->refcnt); 563 IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow")); 564} 565static __inline int 566sa_delref(struct secasvar *sav) 567{ 568 569 IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow")); 570 return (refcount_release(&sav->refcnt)); 571} 572 573#define SP_ADDREF(p) do { \ 574 (p)->refcnt++; \ 575 IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ 576} while (0) 577#define SP_DELREF(p) do { \ 578 IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ 579 (p)->refcnt--; \ 580} while (0) 581 582 583/* 584 * Update the refcnt while holding the SPTREE lock. 585 */ 586void 587key_addref(struct secpolicy *sp) 588{ 589 SPTREE_LOCK(); 590 SP_ADDREF(sp); 591 SPTREE_UNLOCK(); 592} 593 594/* 595 * Return 0 when there are known to be no SP's for the specified 596 * direction. Otherwise return 1. This is used by IPsec code 597 * to optimize performance. 598 */ 599int 600key_havesp(u_int dir) 601{ 602 603 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 604 LIST_FIRST(&V_sptree[dir]) != NULL : 1); 605} 606 607/* %%% IPsec policy management */ 608/* 609 * allocating a SP for OUTBOUND or INBOUND packet. 610 * Must call key_freesp() later. 611 * OUT: NULL: not found 612 * others: found and return the pointer. 613 */ 614struct secpolicy * 615key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 616{ 617 struct secpolicy *sp; 618 619 IPSEC_ASSERT(spidx != NULL, ("null spidx")); 620 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 621 ("invalid direction %u", dir)); 622 623 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 624 printf("DP %s from %s:%u\n", __func__, where, tag)); 625 626 /* get a SP entry */ 627 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 628 printf("*** objects\n"); 629 kdebug_secpolicyindex(spidx)); 630 631 SPTREE_LOCK(); 632 LIST_FOREACH(sp, &V_sptree[dir], chain) { 633 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 634 printf("*** in SPD\n"); 635 kdebug_secpolicyindex(&sp->spidx)); 636 637 if (sp->state == IPSEC_SPSTATE_DEAD) 638 continue; 639 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 640 goto found; 641 } 642 sp = NULL; 643found: 644 if (sp) { 645 /* sanity check */ 646 KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 647 648 /* found a SPD entry */ 649 sp->lastused = time_second; 650 SP_ADDREF(sp); 651 } 652 SPTREE_UNLOCK(); 653 654 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 655 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 656 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 657 return sp; 658} 659 660/* 661 * allocating a SP for OUTBOUND or INBOUND packet. 662 * Must call key_freesp() later. 663 * OUT: NULL: not found 664 * others: found and return the pointer. 665 */ 666struct secpolicy * 667key_allocsp2(u_int32_t spi, 668 union sockaddr_union *dst, 669 u_int8_t proto, 670 u_int dir, 671 const char* where, int tag) 672{ 673 struct secpolicy *sp; 674 675 IPSEC_ASSERT(dst != NULL, ("null dst")); 676 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 677 ("invalid direction %u", dir)); 678 679 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 680 printf("DP %s from %s:%u\n", __func__, where, tag)); 681 682 /* get a SP entry */ 683 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 684 printf("*** objects\n"); 685 printf("spi %u proto %u dir %u\n", spi, proto, dir); 686 kdebug_sockaddr(&dst->sa)); 687 688 SPTREE_LOCK(); 689 LIST_FOREACH(sp, &V_sptree[dir], chain) { 690 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 691 printf("*** in SPD\n"); 692 kdebug_secpolicyindex(&sp->spidx)); 693 694 if (sp->state == IPSEC_SPSTATE_DEAD) 695 continue; 696 /* compare simple values, then dst address */ 697 if (sp->spidx.ul_proto != proto) 698 continue; 699 /* NB: spi's must exist and match */ 700 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 701 continue; 702 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 703 goto found; 704 } 705 sp = NULL; 706found: 707 if (sp) { 708 /* sanity check */ 709 KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 710 711 /* found a SPD entry */ 712 sp->lastused = time_second; 713 SP_ADDREF(sp); 714 } 715 SPTREE_UNLOCK(); 716 717 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 718 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 719 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 720 return sp; 721} 722 723#if 0 724/* 725 * return a policy that matches this particular inbound packet. 726 * XXX slow 727 */ 728struct secpolicy * 729key_gettunnel(const struct sockaddr *osrc, 730 const struct sockaddr *odst, 731 const struct sockaddr *isrc, 732 const struct sockaddr *idst, 733 const char* where, int tag) 734{ 735 struct secpolicy *sp; 736 const int dir = IPSEC_DIR_INBOUND; 737 struct ipsecrequest *r1, *r2, *p; 738 struct secpolicyindex spidx; 739 740 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 741 printf("DP %s from %s:%u\n", __func__, where, tag)); 742 743 if (isrc->sa_family != idst->sa_family) { 744 ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", 745 __func__, isrc->sa_family, idst->sa_family)); 746 sp = NULL; 747 goto done; 748 } 749 750 SPTREE_LOCK(); 751 LIST_FOREACH(sp, &V_sptree[dir], chain) { 752 if (sp->state == IPSEC_SPSTATE_DEAD) 753 continue; 754 755 r1 = r2 = NULL; 756 for (p = sp->req; p; p = p->next) { 757 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 758 continue; 759 760 r1 = r2; 761 r2 = p; 762 763 if (!r1) { 764 /* here we look at address matches only */ 765 spidx = sp->spidx; 766 if (isrc->sa_len > sizeof(spidx.src) || 767 idst->sa_len > sizeof(spidx.dst)) 768 continue; 769 bcopy(isrc, &spidx.src, isrc->sa_len); 770 bcopy(idst, &spidx.dst, idst->sa_len); 771 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 772 continue; 773 } else { 774 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 775 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 776 continue; 777 } 778 779 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 780 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 781 continue; 782 783 goto found; 784 } 785 } 786 sp = NULL; 787found: 788 if (sp) { 789 sp->lastused = time_second; 790 SP_ADDREF(sp); 791 } 792 SPTREE_UNLOCK(); 793done: 794 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 795 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 796 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 797 return sp; 798} 799#endif 800 801/* 802 * allocating an SA entry for an *OUTBOUND* packet. 803 * checking each request entries in SP, and acquire an SA if need. 804 * OUT: 0: there are valid requests. 805 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 806 */ 807int 808key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 809{ 810 u_int level; 811 int error; 812 struct secasvar *sav; 813 814 IPSEC_ASSERT(isr != NULL, ("null isr")); 815 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 816 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 817 saidx->mode == IPSEC_MODE_TUNNEL, 818 ("unexpected policy %u", saidx->mode)); 819 820 /* 821 * XXX guard against protocol callbacks from the crypto 822 * thread as they reference ipsecrequest.sav which we 823 * temporarily null out below. Need to rethink how we 824 * handle bundled SA's in the callback thread. 825 */ 826 IPSECREQUEST_LOCK_ASSERT(isr); 827 828 /* get current level */ 829 level = ipsec_get_reqlevel(isr); 830 831 /* 832 * We check new SA in the IPsec request because a different 833 * SA may be involved each time this request is checked, either 834 * because new SAs are being configured, or this request is 835 * associated with an unconnected datagram socket, or this request 836 * is associated with a system default policy. 837 * 838 * key_allocsa_policy should allocate the oldest SA available. 839 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 840 */ 841 sav = key_allocsa_policy(saidx); 842 if (sav != isr->sav) { 843 /* SA need to be updated. */ 844 if (!IPSECREQUEST_UPGRADE(isr)) { 845 /* Kick everyone off. */ 846 IPSECREQUEST_UNLOCK(isr); 847 IPSECREQUEST_WLOCK(isr); 848 } 849 if (isr->sav != NULL) 850 KEY_FREESAV(&isr->sav); 851 isr->sav = sav; 852 IPSECREQUEST_DOWNGRADE(isr); 853 } else if (sav != NULL) 854 KEY_FREESAV(&sav); 855 856 /* When there is SA. */ 857 if (isr->sav != NULL) { 858 if (isr->sav->state != SADB_SASTATE_MATURE && 859 isr->sav->state != SADB_SASTATE_DYING) 860 return EINVAL; 861 return 0; 862 } 863 864 /* there is no SA */ 865 error = key_acquire(saidx, isr->sp); 866 if (error != 0) { 867 /* XXX What should I do ? */ 868 ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 869 __func__, error)); 870 return error; 871 } 872 873 if (level != IPSEC_LEVEL_REQUIRE) { 874 /* XXX sigh, the interface to this routine is botched */ 875 IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); 876 return 0; 877 } else { 878 return ENOENT; 879 } 880} 881 882/* 883 * allocating a SA for policy entry from SAD. 884 * NOTE: searching SAD of aliving state. 885 * OUT: NULL: not found. 886 * others: found and return the pointer. 887 */ 888static struct secasvar * 889key_allocsa_policy(const struct secasindex *saidx) 890{ 891#define N(a) _ARRAYLEN(a) 892 struct secashead *sah; 893 struct secasvar *sav; 894 u_int stateidx, arraysize; 895 const u_int *state_valid; 896 897 state_valid = NULL; /* silence gcc */ 898 arraysize = 0; /* silence gcc */ 899 900 SAHTREE_LOCK(); 901 LIST_FOREACH(sah, &V_sahtree, chain) { 902 if (sah->state == SADB_SASTATE_DEAD) 903 continue; 904 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { 905 if (V_key_preferred_oldsa) { 906 state_valid = saorder_state_valid_prefer_old; 907 arraysize = N(saorder_state_valid_prefer_old); 908 } else { 909 state_valid = saorder_state_valid_prefer_new; 910 arraysize = N(saorder_state_valid_prefer_new); 911 } 912 break; 913 } 914 } 915 SAHTREE_UNLOCK(); 916 if (sah == NULL) 917 return NULL; 918 919 /* search valid state */ 920 for (stateidx = 0; stateidx < arraysize; stateidx++) { 921 sav = key_do_allocsa_policy(sah, state_valid[stateidx]); 922 if (sav != NULL) 923 return sav; 924 } 925 926 return NULL; 927#undef N 928} 929 930/* 931 * searching SAD with direction, protocol, mode and state. 932 * called by key_allocsa_policy(). 933 * OUT: 934 * NULL : not found 935 * others : found, pointer to a SA. 936 */ 937static struct secasvar * 938key_do_allocsa_policy(struct secashead *sah, u_int state) 939{ 940 struct secasvar *sav, *nextsav, *candidate, *d; 941 942 /* initilize */ 943 candidate = NULL; 944 945 SAHTREE_LOCK(); 946 for (sav = LIST_FIRST(&sah->savtree[state]); 947 sav != NULL; 948 sav = nextsav) { 949 950 nextsav = LIST_NEXT(sav, chain); 951 952 /* sanity check */ 953 KEY_CHKSASTATE(sav->state, state, __func__); 954 955 /* initialize */ 956 if (candidate == NULL) { 957 candidate = sav; 958 continue; 959 } 960 961 /* Which SA is the better ? */ 962 963 IPSEC_ASSERT(candidate->lft_c != NULL, 964 ("null candidate lifetime")); 965 IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime")); 966 967 /* What the best method is to compare ? */ 968 if (V_key_preferred_oldsa) { 969 if (candidate->lft_c->addtime > 970 sav->lft_c->addtime) { 971 candidate = sav; 972 } 973 continue; 974 /*NOTREACHED*/ 975 } 976 977 /* preferred new sa rather than old sa */ 978 if (candidate->lft_c->addtime < 979 sav->lft_c->addtime) { 980 d = candidate; 981 candidate = sav; 982 } else 983 d = sav; 984 985 /* 986 * prepared to delete the SA when there is more 987 * suitable candidate and the lifetime of the SA is not 988 * permanent. 989 */ 990 if (d->lft_h->addtime != 0) { 991 struct mbuf *m, *result; 992 u_int8_t satype; 993 994 key_sa_chgstate(d, SADB_SASTATE_DEAD); 995 996 IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count")); 997 998 satype = key_proto2satype(d->sah->saidx.proto); 999 if (satype == 0) 1000 goto msgfail; 1001 1002 m = key_setsadbmsg(SADB_DELETE, 0, 1003 satype, 0, 0, d->refcnt - 1); 1004 if (!m) 1005 goto msgfail; 1006 result = m; 1007 1008 /* set sadb_address for saidx's. */ 1009 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1010 &d->sah->saidx.src.sa, 1011 d->sah->saidx.src.sa.sa_len << 3, 1012 IPSEC_ULPROTO_ANY); 1013 if (!m) 1014 goto msgfail; 1015 m_cat(result, m); 1016 1017 /* set sadb_address for saidx's. */ 1018 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1019 &d->sah->saidx.dst.sa, 1020 d->sah->saidx.dst.sa.sa_len << 3, 1021 IPSEC_ULPROTO_ANY); 1022 if (!m) 1023 goto msgfail; 1024 m_cat(result, m); 1025 1026 /* create SA extension */ 1027 m = key_setsadbsa(d); 1028 if (!m) 1029 goto msgfail; 1030 m_cat(result, m); 1031 1032 if (result->m_len < sizeof(struct sadb_msg)) { 1033 result = m_pullup(result, 1034 sizeof(struct sadb_msg)); 1035 if (result == NULL) 1036 goto msgfail; 1037 } 1038 1039 result->m_pkthdr.len = 0; 1040 for (m = result; m; m = m->m_next) 1041 result->m_pkthdr.len += m->m_len; 1042 mtod(result, struct sadb_msg *)->sadb_msg_len = 1043 PFKEY_UNIT64(result->m_pkthdr.len); 1044 1045 if (key_sendup_mbuf(NULL, result, 1046 KEY_SENDUP_REGISTERED)) 1047 goto msgfail; 1048 msgfail: 1049 KEY_FREESAV(&d); 1050 } 1051 } 1052 if (candidate) { 1053 sa_addref(candidate); 1054 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1055 printf("DP %s cause refcnt++:%d SA:%p\n", 1056 __func__, candidate->refcnt, candidate)); 1057 } 1058 SAHTREE_UNLOCK(); 1059 1060 return candidate; 1061} 1062 1063/* 1064 * allocating a usable SA entry for a *INBOUND* packet. 1065 * Must call key_freesav() later. 1066 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1067 * NULL: not found, or error occured. 1068 * 1069 * In the comparison, no source address is used--for RFC2401 conformance. 1070 * To quote, from section 4.1: 1071 * A security association is uniquely identified by a triple consisting 1072 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1073 * security protocol (AH or ESP) identifier. 1074 * Note that, however, we do need to keep source address in IPsec SA. 1075 * IKE specification and PF_KEY specification do assume that we 1076 * keep source address in IPsec SA. We see a tricky situation here. 1077 */ 1078struct secasvar * 1079key_allocsa( 1080 union sockaddr_union *dst, 1081 u_int proto, 1082 u_int32_t spi, 1083 const char* where, int tag) 1084{ 1085 struct secashead *sah; 1086 struct secasvar *sav; 1087 u_int stateidx, arraysize, state; 1088 const u_int *saorder_state_valid; 1089 int chkport; 1090 1091 IPSEC_ASSERT(dst != NULL, ("null dst address")); 1092 1093 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1094 printf("DP %s from %s:%u\n", __func__, where, tag)); 1095 1096#ifdef IPSEC_NAT_T 1097 chkport = (dst->sa.sa_family == AF_INET && 1098 dst->sa.sa_len == sizeof(struct sockaddr_in) && 1099 dst->sin.sin_port != 0); 1100#else 1101 chkport = 0; 1102#endif 1103 1104 /* 1105 * searching SAD. 1106 * XXX: to be checked internal IP header somewhere. Also when 1107 * IPsec tunnel packet is received. But ESP tunnel mode is 1108 * encrypted so we can't check internal IP header. 1109 */ 1110 SAHTREE_LOCK(); 1111 if (V_key_preferred_oldsa) { 1112 saorder_state_valid = saorder_state_valid_prefer_old; 1113 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1114 } else { 1115 saorder_state_valid = saorder_state_valid_prefer_new; 1116 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1117 } 1118 LIST_FOREACH(sah, &V_sahtree, chain) { 1119 /* search valid state */ 1120 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1121 state = saorder_state_valid[stateidx]; 1122 LIST_FOREACH(sav, &sah->savtree[state], chain) { 1123 /* sanity check */ 1124 KEY_CHKSASTATE(sav->state, state, __func__); 1125 /* do not return entries w/ unusable state */ 1126 if (sav->state != SADB_SASTATE_MATURE && 1127 sav->state != SADB_SASTATE_DYING) 1128 continue; 1129 if (proto != sav->sah->saidx.proto) 1130 continue; 1131 if (spi != sav->spi) 1132 continue; 1133#if 0 /* don't check src */ 1134 /* check src address */ 1135 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, chkport) != 0) 1136 continue; 1137#endif 1138 /* check dst address */ 1139 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1140 continue; 1141 sa_addref(sav); 1142 goto done; 1143 } 1144 } 1145 } 1146 sav = NULL; 1147done: 1148 SAHTREE_UNLOCK(); 1149 1150 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1151 printf("DP %s return SA:%p; refcnt %u\n", __func__, 1152 sav, sav ? sav->refcnt : 0)); 1153 return sav; 1154} 1155 1156/* 1157 * Must be called after calling key_allocsp(). 1158 * For both the packet without socket and key_freeso(). 1159 */ 1160void 1161_key_freesp(struct secpolicy **spp, const char* where, int tag) 1162{ 1163 struct secpolicy *sp = *spp; 1164 1165 IPSEC_ASSERT(sp != NULL, ("null sp")); 1166 1167 SPTREE_LOCK(); 1168 SP_DELREF(sp); 1169 1170 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1171 printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1172 __func__, sp, sp->id, where, tag, sp->refcnt)); 1173 1174 if (sp->refcnt == 0) { 1175 *spp = NULL; 1176 key_delsp(sp); 1177 } 1178 SPTREE_UNLOCK(); 1179} 1180 1181/* 1182 * Must be called after calling key_allocsp(). 1183 * For the packet with socket. 1184 */ 1185void 1186key_freeso(struct socket *so) 1187{ 1188 IPSEC_ASSERT(so != NULL, ("null so")); 1189 1190 switch (so->so_proto->pr_domain->dom_family) { 1191#if defined(INET) || defined(INET6) 1192#ifdef INET 1193 case PF_INET: 1194#endif 1195#ifdef INET6 1196 case PF_INET6: 1197#endif 1198 { 1199 struct inpcb *pcb = sotoinpcb(so); 1200 1201 /* Does it have a PCB ? */ 1202 if (pcb == NULL) 1203 return; 1204 key_freesp_so(&pcb->inp_sp->sp_in); 1205 key_freesp_so(&pcb->inp_sp->sp_out); 1206 } 1207 break; 1208#endif /* INET || INET6 */ 1209 default: 1210 ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n", 1211 __func__, so->so_proto->pr_domain->dom_family)); 1212 return; 1213 } 1214} 1215 1216static void 1217key_freesp_so(struct secpolicy **sp) 1218{ 1219 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp")); 1220 1221 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1222 (*sp)->policy == IPSEC_POLICY_BYPASS) 1223 return; 1224 1225 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1226 ("invalid policy %u", (*sp)->policy)); 1227 KEY_FREESP(sp); 1228} 1229 1230void 1231key_addrefsa(struct secasvar *sav, const char* where, int tag) 1232{ 1233 1234 IPSEC_ASSERT(sav != NULL, ("null sav")); 1235 IPSEC_ASSERT(sav->refcnt > 0, ("refcount must exist")); 1236 1237 sa_addref(sav); 1238} 1239 1240/* 1241 * Must be called after calling key_allocsa(). 1242 * This function is called by key_freesp() to free some SA allocated 1243 * for a policy. 1244 */ 1245void 1246key_freesav(struct secasvar **psav, const char* where, int tag) 1247{ 1248 struct secasvar *sav = *psav; 1249 1250 IPSEC_ASSERT(sav != NULL, ("null sav")); 1251 1252 if (sa_delref(sav)) { 1253 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1254 printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1255 __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1256 *psav = NULL; 1257 key_delsav(sav); 1258 } else { 1259 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1260 printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1261 __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1262 } 1263} 1264 1265/* %%% SPD management */ 1266/* 1267 * free security policy entry. 1268 */ 1269static void 1270key_delsp(struct secpolicy *sp) 1271{ 1272 struct ipsecrequest *isr, *nextisr; 1273 1274 IPSEC_ASSERT(sp != NULL, ("null sp")); 1275 SPTREE_LOCK_ASSERT(); 1276 1277 sp->state = IPSEC_SPSTATE_DEAD; 1278 1279 IPSEC_ASSERT(sp->refcnt == 0, 1280 ("SP with references deleted (refcnt %u)", sp->refcnt)); 1281 1282 /* remove from SP index */ 1283 if (__LIST_CHAINED(sp)) 1284 LIST_REMOVE(sp, chain); 1285 1286 for (isr = sp->req; isr != NULL; isr = nextisr) { 1287 if (isr->sav != NULL) { 1288 KEY_FREESAV(&isr->sav); 1289 isr->sav = NULL; 1290 } 1291 1292 nextisr = isr->next; 1293 ipsec_delisr(isr); 1294 } 1295 _key_delsp(sp); 1296} 1297 1298/* 1299 * search SPD 1300 * OUT: NULL : not found 1301 * others : found, pointer to a SP. 1302 */ 1303static struct secpolicy * 1304key_getsp(struct secpolicyindex *spidx) 1305{ 1306 struct secpolicy *sp; 1307 1308 IPSEC_ASSERT(spidx != NULL, ("null spidx")); 1309 1310 SPTREE_LOCK(); 1311 LIST_FOREACH(sp, &V_sptree[spidx->dir], chain) { 1312 if (sp->state == IPSEC_SPSTATE_DEAD) 1313 continue; 1314 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1315 SP_ADDREF(sp); 1316 break; 1317 } 1318 } 1319 SPTREE_UNLOCK(); 1320 1321 return sp; 1322} 1323 1324/* 1325 * get SP by index. 1326 * OUT: NULL : not found 1327 * others : found, pointer to a SP. 1328 */ 1329static struct secpolicy * 1330key_getspbyid(u_int32_t id) 1331{ 1332 struct secpolicy *sp; 1333 1334 SPTREE_LOCK(); 1335 LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) { 1336 if (sp->state == IPSEC_SPSTATE_DEAD) 1337 continue; 1338 if (sp->id == id) { 1339 SP_ADDREF(sp); 1340 goto done; 1341 } 1342 } 1343 1344 LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) { 1345 if (sp->state == IPSEC_SPSTATE_DEAD) 1346 continue; 1347 if (sp->id == id) { 1348 SP_ADDREF(sp); 1349 goto done; 1350 } 1351 } 1352done: 1353 SPTREE_UNLOCK(); 1354 1355 return sp; 1356} 1357 1358struct secpolicy * 1359key_newsp(const char* where, int tag) 1360{ 1361 struct secpolicy *newsp = NULL; 1362 1363 newsp = (struct secpolicy *) 1364 malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO); 1365 if (newsp) { 1366 SECPOLICY_LOCK_INIT(newsp); 1367 newsp->refcnt = 1; 1368 newsp->req = NULL; 1369 } 1370 1371 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1372 printf("DP %s from %s:%u return SP:%p\n", __func__, 1373 where, tag, newsp)); 1374 return newsp; 1375} 1376 1377static void 1378_key_delsp(struct secpolicy *sp) 1379{ 1380 SECPOLICY_LOCK_DESTROY(sp); 1381 free(sp, M_IPSEC_SP); 1382} 1383 1384/* 1385 * create secpolicy structure from sadb_x_policy structure. 1386 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1387 * so must be set properly later. 1388 */ 1389struct secpolicy * 1390key_msg2sp(xpl0, len, error) 1391 struct sadb_x_policy *xpl0; 1392 size_t len; 1393 int *error; 1394{ 1395 struct secpolicy *newsp; 1396 1397 IPSEC_ASSERT(xpl0 != NULL, ("null xpl0")); 1398 IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len)); 1399 1400 if (len != PFKEY_EXTLEN(xpl0)) { 1401 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__)); 1402 *error = EINVAL; 1403 return NULL; 1404 } 1405 1406 if ((newsp = KEY_NEWSP()) == NULL) { 1407 *error = ENOBUFS; 1408 return NULL; 1409 } 1410 1411 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1412 newsp->policy = xpl0->sadb_x_policy_type; 1413 1414 /* check policy */ 1415 switch (xpl0->sadb_x_policy_type) { 1416 case IPSEC_POLICY_DISCARD: 1417 case IPSEC_POLICY_NONE: 1418 case IPSEC_POLICY_ENTRUST: 1419 case IPSEC_POLICY_BYPASS: 1420 newsp->req = NULL; 1421 break; 1422 1423 case IPSEC_POLICY_IPSEC: 1424 { 1425 int tlen; 1426 struct sadb_x_ipsecrequest *xisr; 1427 struct ipsecrequest **p_isr = &newsp->req; 1428 1429 /* validity check */ 1430 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1431 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", 1432 __func__)); 1433 KEY_FREESP(&newsp); 1434 *error = EINVAL; 1435 return NULL; 1436 } 1437 1438 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1439 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1440 1441 while (tlen > 0) { 1442 /* length check */ 1443 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1444 ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest " 1445 "length.\n", __func__)); 1446 KEY_FREESP(&newsp); 1447 *error = EINVAL; 1448 return NULL; 1449 } 1450 1451 /* allocate request buffer */ 1452 /* NB: data structure is zero'd */ 1453 *p_isr = ipsec_newisr(); 1454 if ((*p_isr) == NULL) { 1455 ipseclog((LOG_DEBUG, 1456 "%s: No more memory.\n", __func__)); 1457 KEY_FREESP(&newsp); 1458 *error = ENOBUFS; 1459 return NULL; 1460 } 1461 1462 /* set values */ 1463 switch (xisr->sadb_x_ipsecrequest_proto) { 1464 case IPPROTO_ESP: 1465 case IPPROTO_AH: 1466 case IPPROTO_IPCOMP: 1467 break; 1468 default: 1469 ipseclog((LOG_DEBUG, 1470 "%s: invalid proto type=%u\n", __func__, 1471 xisr->sadb_x_ipsecrequest_proto)); 1472 KEY_FREESP(&newsp); 1473 *error = EPROTONOSUPPORT; 1474 return NULL; 1475 } 1476 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1477 1478 switch (xisr->sadb_x_ipsecrequest_mode) { 1479 case IPSEC_MODE_TRANSPORT: 1480 case IPSEC_MODE_TUNNEL: 1481 break; 1482 case IPSEC_MODE_ANY: 1483 default: 1484 ipseclog((LOG_DEBUG, 1485 "%s: invalid mode=%u\n", __func__, 1486 xisr->sadb_x_ipsecrequest_mode)); 1487 KEY_FREESP(&newsp); 1488 *error = EINVAL; 1489 return NULL; 1490 } 1491 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1492 1493 switch (xisr->sadb_x_ipsecrequest_level) { 1494 case IPSEC_LEVEL_DEFAULT: 1495 case IPSEC_LEVEL_USE: 1496 case IPSEC_LEVEL_REQUIRE: 1497 break; 1498 case IPSEC_LEVEL_UNIQUE: 1499 /* validity check */ 1500 /* 1501 * If range violation of reqid, kernel will 1502 * update it, don't refuse it. 1503 */ 1504 if (xisr->sadb_x_ipsecrequest_reqid 1505 > IPSEC_MANUAL_REQID_MAX) { 1506 ipseclog((LOG_DEBUG, 1507 "%s: reqid=%d range " 1508 "violation, updated by kernel.\n", 1509 __func__, 1510 xisr->sadb_x_ipsecrequest_reqid)); 1511 xisr->sadb_x_ipsecrequest_reqid = 0; 1512 } 1513 1514 /* allocate new reqid id if reqid is zero. */ 1515 if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1516 u_int32_t reqid; 1517 if ((reqid = key_newreqid()) == 0) { 1518 KEY_FREESP(&newsp); 1519 *error = ENOBUFS; 1520 return NULL; 1521 } 1522 (*p_isr)->saidx.reqid = reqid; 1523 xisr->sadb_x_ipsecrequest_reqid = reqid; 1524 } else { 1525 /* set it for manual keying. */ 1526 (*p_isr)->saidx.reqid = 1527 xisr->sadb_x_ipsecrequest_reqid; 1528 } 1529 break; 1530 1531 default: 1532 ipseclog((LOG_DEBUG, "%s: invalid level=%u\n", 1533 __func__, 1534 xisr->sadb_x_ipsecrequest_level)); 1535 KEY_FREESP(&newsp); 1536 *error = EINVAL; 1537 return NULL; 1538 } 1539 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1540 1541 /* set IP addresses if there */ 1542 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1543 struct sockaddr *paddr; 1544 1545 paddr = (struct sockaddr *)(xisr + 1); 1546 1547 /* validity check */ 1548 if (paddr->sa_len 1549 > sizeof((*p_isr)->saidx.src)) { 1550 ipseclog((LOG_DEBUG, "%s: invalid " 1551 "request address length.\n", 1552 __func__)); 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 *)((caddr_t)paddr 1561 + paddr->sa_len); 1562 1563 /* validity check */ 1564 if (paddr->sa_len 1565 > sizeof((*p_isr)->saidx.dst)) { 1566 ipseclog((LOG_DEBUG, "%s: invalid " 1567 "request address length.\n", 1568 __func__)); 1569 KEY_FREESP(&newsp); 1570 *error = EINVAL; 1571 return NULL; 1572 } 1573 bcopy(paddr, &(*p_isr)->saidx.dst, 1574 paddr->sa_len); 1575 } 1576 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, "%s: becoming tlen < 0.\n", 1586 __func__)); 1587 KEY_FREESP(&newsp); 1588 *error = EINVAL; 1589 return NULL; 1590 } 1591 1592 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr 1593 + xisr->sadb_x_ipsecrequest_len); 1594 } 1595 } 1596 break; 1597 default: 1598 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); 1599 KEY_FREESP(&newsp); 1600 *error = EINVAL; 1601 return NULL; 1602 } 1603 1604 *error = 0; 1605 return newsp; 1606} 1607 1608static u_int32_t 1609key_newreqid() 1610{ 1611 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1612 1613 auto_reqid = (auto_reqid == ~0 1614 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1615 1616 /* XXX should be unique check */ 1617 1618 return auto_reqid; 1619} 1620 1621/* 1622 * copy secpolicy struct to sadb_x_policy structure indicated. 1623 */ 1624struct mbuf * 1625key_sp2msg(sp) 1626 struct secpolicy *sp; 1627{ 1628 struct sadb_x_policy *xpl; 1629 int tlen; 1630 caddr_t p; 1631 struct mbuf *m; 1632 1633 IPSEC_ASSERT(sp != NULL, ("null policy")); 1634 1635 tlen = key_getspreqmsglen(sp); 1636 1637 m = key_alloc_mbuf(tlen); 1638 if (!m || m->m_next) { /*XXX*/ 1639 if (m) 1640 m_freem(m); 1641 return NULL; 1642 } 1643 1644 m->m_len = tlen; 1645 m->m_next = NULL; 1646 xpl = mtod(m, struct sadb_x_policy *); 1647 bzero(xpl, tlen); 1648 1649 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1650 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1651 xpl->sadb_x_policy_type = sp->policy; 1652 xpl->sadb_x_policy_dir = sp->spidx.dir; 1653 xpl->sadb_x_policy_id = sp->id; 1654 p = (caddr_t)xpl + sizeof(*xpl); 1655 1656 /* if is the policy for ipsec ? */ 1657 if (sp->policy == IPSEC_POLICY_IPSEC) { 1658 struct sadb_x_ipsecrequest *xisr; 1659 struct ipsecrequest *isr; 1660 1661 for (isr = sp->req; isr != NULL; isr = isr->next) { 1662 1663 xisr = (struct sadb_x_ipsecrequest *)p; 1664 1665 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1666 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1667 xisr->sadb_x_ipsecrequest_level = isr->level; 1668 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1669 1670 p += sizeof(*xisr); 1671 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1672 p += isr->saidx.src.sa.sa_len; 1673 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1674 p += isr->saidx.src.sa.sa_len; 1675 1676 xisr->sadb_x_ipsecrequest_len = 1677 PFKEY_ALIGN8(sizeof(*xisr) 1678 + isr->saidx.src.sa.sa_len 1679 + isr->saidx.dst.sa.sa_len); 1680 } 1681 } 1682 1683 return m; 1684} 1685 1686/* m will not be freed nor modified */ 1687static struct mbuf * 1688#ifdef __STDC__ 1689key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1690 int ndeep, int nitem, ...) 1691#else 1692key_gather_mbuf(m, mhp, ndeep, nitem, va_alist) 1693 struct mbuf *m; 1694 const struct sadb_msghdr *mhp; 1695 int ndeep; 1696 int nitem; 1697 va_dcl 1698#endif 1699{ 1700 va_list ap; 1701 int idx; 1702 int i; 1703 struct mbuf *result = NULL, *n; 1704 int len; 1705 1706 IPSEC_ASSERT(m != NULL, ("null mbuf")); 1707 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1708 1709 va_start(ap, nitem); 1710 for (i = 0; i < nitem; i++) { 1711 idx = va_arg(ap, int); 1712 if (idx < 0 || idx > SADB_EXT_MAX) 1713 goto fail; 1714 /* don't attempt to pull empty extension */ 1715 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1716 continue; 1717 if (idx != SADB_EXT_RESERVED && 1718 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1719 continue; 1720 1721 if (idx == SADB_EXT_RESERVED) { 1722 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1723 1724 IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len)); 1725 1726 MGETHDR(n, M_DONTWAIT, MT_DATA); 1727 if (!n) 1728 goto fail; 1729 n->m_len = len; 1730 n->m_next = NULL; 1731 m_copydata(m, 0, sizeof(struct sadb_msg), 1732 mtod(n, caddr_t)); 1733 } else if (i < ndeep) { 1734 len = mhp->extlen[idx]; 1735 n = key_alloc_mbuf(len); 1736 if (!n || n->m_next) { /*XXX*/ 1737 if (n) 1738 m_freem(n); 1739 goto fail; 1740 } 1741 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1742 mtod(n, caddr_t)); 1743 } else { 1744 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1745 M_DONTWAIT); 1746 } 1747 if (n == NULL) 1748 goto fail; 1749 1750 if (result) 1751 m_cat(result, n); 1752 else 1753 result = n; 1754 } 1755 va_end(ap); 1756 1757 if ((result->m_flags & M_PKTHDR) != 0) { 1758 result->m_pkthdr.len = 0; 1759 for (n = result; n; n = n->m_next) 1760 result->m_pkthdr.len += n->m_len; 1761 } 1762 1763 return result; 1764 1765fail: 1766 m_freem(result); 1767 return NULL; 1768} 1769 1770/* 1771 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1772 * add an entry to SP database, when received 1773 * <base, address(SD), (lifetime(H),) policy> 1774 * from the user(?). 1775 * Adding to SP database, 1776 * and send 1777 * <base, address(SD), (lifetime(H),) policy> 1778 * to the socket which was send. 1779 * 1780 * SPDADD set a unique policy entry. 1781 * SPDSETIDX like SPDADD without a part of policy requests. 1782 * SPDUPDATE replace a unique policy entry. 1783 * 1784 * m will always be freed. 1785 */ 1786static int 1787key_spdadd(so, m, mhp) 1788 struct socket *so; 1789 struct mbuf *m; 1790 const struct sadb_msghdr *mhp; 1791{ 1792 struct sadb_address *src0, *dst0; 1793 struct sadb_x_policy *xpl0, *xpl; 1794 struct sadb_lifetime *lft = NULL; 1795 struct secpolicyindex spidx; 1796 struct secpolicy *newsp; 1797 int error; 1798 1799 IPSEC_ASSERT(so != NULL, ("null socket")); 1800 IPSEC_ASSERT(m != NULL, ("null mbuf")); 1801 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1802 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 1803 1804 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1805 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1806 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1807 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1808 return key_senderror(so, m, EINVAL); 1809 } 1810 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1811 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1812 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1813 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1814 __func__)); 1815 return key_senderror(so, m, EINVAL); 1816 } 1817 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1818 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1819 < sizeof(struct sadb_lifetime)) { 1820 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1821 __func__)); 1822 return key_senderror(so, m, EINVAL); 1823 } 1824 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1825 } 1826 1827 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1828 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1829 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1830 1831 /* 1832 * Note: do not parse SADB_X_EXT_NAT_T_* here: 1833 * we are processing traffic endpoints. 1834 */ 1835 1836 /* make secindex */ 1837 /* XXX boundary check against sa_len */ 1838 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1839 src0 + 1, 1840 dst0 + 1, 1841 src0->sadb_address_prefixlen, 1842 dst0->sadb_address_prefixlen, 1843 src0->sadb_address_proto, 1844 &spidx); 1845 1846 /* checking the direciton. */ 1847 switch (xpl0->sadb_x_policy_dir) { 1848 case IPSEC_DIR_INBOUND: 1849 case IPSEC_DIR_OUTBOUND: 1850 break; 1851 default: 1852 ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 1853 mhp->msg->sadb_msg_errno = EINVAL; 1854 return 0; 1855 } 1856 1857 /* check policy */ 1858 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1859 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1860 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1861 ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__)); 1862 return key_senderror(so, m, EINVAL); 1863 } 1864 1865 /* policy requests are mandatory when action is ipsec. */ 1866 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1867 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1868 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1869 ipseclog((LOG_DEBUG, "%s: some policy requests part required\n", 1870 __func__)); 1871 return key_senderror(so, m, EINVAL); 1872 } 1873 1874 /* 1875 * checking there is SP already or not. 1876 * SPDUPDATE doesn't depend on whether there is a SP or not. 1877 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1878 * then error. 1879 */ 1880 newsp = key_getsp(&spidx); 1881 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1882 if (newsp) { 1883 SPTREE_LOCK(); 1884 newsp->state = IPSEC_SPSTATE_DEAD; 1885 SPTREE_UNLOCK(); 1886 KEY_FREESP(&newsp); 1887 } 1888 } else { 1889 if (newsp != NULL) { 1890 KEY_FREESP(&newsp); 1891 ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", 1892 __func__)); 1893 return key_senderror(so, m, EEXIST); 1894 } 1895 } 1896 1897 /* allocation new SP entry */ 1898 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1899 return key_senderror(so, m, error); 1900 } 1901 1902 if ((newsp->id = key_getnewspid()) == 0) { 1903 _key_delsp(newsp); 1904 return key_senderror(so, m, ENOBUFS); 1905 } 1906 1907 /* XXX boundary check against sa_len */ 1908 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1909 src0 + 1, 1910 dst0 + 1, 1911 src0->sadb_address_prefixlen, 1912 dst0->sadb_address_prefixlen, 1913 src0->sadb_address_proto, 1914 &newsp->spidx); 1915 1916 /* sanity check on addr pair */ 1917 if (((struct sockaddr *)(src0 + 1))->sa_family != 1918 ((struct sockaddr *)(dst0+ 1))->sa_family) { 1919 _key_delsp(newsp); 1920 return key_senderror(so, m, EINVAL); 1921 } 1922 if (((struct sockaddr *)(src0 + 1))->sa_len != 1923 ((struct sockaddr *)(dst0+ 1))->sa_len) { 1924 _key_delsp(newsp); 1925 return key_senderror(so, m, EINVAL); 1926 } 1927#if 1 1928 if (newsp->req && newsp->req->saidx.src.sa.sa_family && newsp->req->saidx.dst.sa.sa_family) { 1929 if (newsp->req->saidx.src.sa.sa_family != newsp->req->saidx.dst.sa.sa_family) { 1930 _key_delsp(newsp); 1931 return key_senderror(so, m, EINVAL); 1932 } 1933 } 1934#endif 1935 1936 newsp->created = time_second; 1937 newsp->lastused = newsp->created; 1938 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1939 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1940 1941 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1942 newsp->state = IPSEC_SPSTATE_ALIVE; 1943 LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1944 1945 /* delete the entry in spacqtree */ 1946 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1947 struct secspacq *spacq = key_getspacq(&spidx); 1948 if (spacq != NULL) { 1949 /* reset counter in order to deletion by timehandler. */ 1950 spacq->created = time_second; 1951 spacq->count = 0; 1952 SPACQ_UNLOCK(); 1953 } 1954 } 1955 1956 { 1957 struct mbuf *n, *mpolicy; 1958 struct sadb_msg *newmsg; 1959 int off; 1960 1961 /* 1962 * Note: do not send SADB_X_EXT_NAT_T_* here: 1963 * we are sending traffic endpoints. 1964 */ 1965 1966 /* create new sadb_msg to reply. */ 1967 if (lft) { 1968 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1969 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1970 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1971 } else { 1972 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1973 SADB_X_EXT_POLICY, 1974 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1975 } 1976 if (!n) 1977 return key_senderror(so, m, ENOBUFS); 1978 1979 if (n->m_len < sizeof(*newmsg)) { 1980 n = m_pullup(n, sizeof(*newmsg)); 1981 if (!n) 1982 return key_senderror(so, m, ENOBUFS); 1983 } 1984 newmsg = mtod(n, struct sadb_msg *); 1985 newmsg->sadb_msg_errno = 0; 1986 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1987 1988 off = 0; 1989 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1990 sizeof(*xpl), &off); 1991 if (mpolicy == NULL) { 1992 /* n is already freed */ 1993 return key_senderror(so, m, ENOBUFS); 1994 } 1995 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 1996 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 1997 m_freem(n); 1998 return key_senderror(so, m, EINVAL); 1999 } 2000 xpl->sadb_x_policy_id = newsp->id; 2001 2002 m_freem(m); 2003 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2004 } 2005} 2006 2007/* 2008 * get new policy id. 2009 * OUT: 2010 * 0: failure. 2011 * others: success. 2012 */ 2013static u_int32_t 2014key_getnewspid() 2015{ 2016 u_int32_t newid = 0; 2017 int count = V_key_spi_trycnt; /* XXX */ 2018 struct secpolicy *sp; 2019 2020 /* when requesting to allocate spi ranged */ 2021 while (count--) { 2022 newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1)); 2023 2024 if ((sp = key_getspbyid(newid)) == NULL) 2025 break; 2026 2027 KEY_FREESP(&sp); 2028 } 2029 2030 if (count == 0 || newid == 0) { 2031 ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", 2032 __func__)); 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 */ 2051static int 2052key_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 IPSEC_ASSERT(so != NULL, ("null so")); 2063 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2064 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2065 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2066 2067 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2068 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2069 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2070 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2071 __func__)); 2072 return key_senderror(so, m, EINVAL); 2073 } 2074 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2075 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2076 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2077 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2078 __func__)); 2079 return key_senderror(so, m, EINVAL); 2080 } 2081 2082 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2083 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2084 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2085 2086 /* 2087 * Note: do not parse SADB_X_EXT_NAT_T_* here: 2088 * we are processing traffic endpoints. 2089 */ 2090 2091 /* make secindex */ 2092 /* XXX boundary check against sa_len */ 2093 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2094 src0 + 1, 2095 dst0 + 1, 2096 src0->sadb_address_prefixlen, 2097 dst0->sadb_address_prefixlen, 2098 src0->sadb_address_proto, 2099 &spidx); 2100 2101 /* checking the direciton. */ 2102 switch (xpl0->sadb_x_policy_dir) { 2103 case IPSEC_DIR_INBOUND: 2104 case IPSEC_DIR_OUTBOUND: 2105 break; 2106 default: 2107 ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 2108 return key_senderror(so, m, EINVAL); 2109 } 2110 2111 /* Is there SP in SPD ? */ 2112 if ((sp = key_getsp(&spidx)) == NULL) { 2113 ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); 2114 return key_senderror(so, m, EINVAL); 2115 } 2116 2117 /* save policy id to buffer to be returned. */ 2118 xpl0->sadb_x_policy_id = sp->id; 2119 2120 SPTREE_LOCK(); 2121 sp->state = IPSEC_SPSTATE_DEAD; 2122 SPTREE_UNLOCK(); 2123 KEY_FREESP(&sp); 2124 2125 { 2126 struct mbuf *n; 2127 struct sadb_msg *newmsg; 2128 2129 /* 2130 * Note: do not send SADB_X_EXT_NAT_T_* here: 2131 * we are sending traffic endpoints. 2132 */ 2133 2134 /* create new sadb_msg to reply. */ 2135 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2136 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2137 if (!n) 2138 return key_senderror(so, m, ENOBUFS); 2139 2140 newmsg = mtod(n, struct sadb_msg *); 2141 newmsg->sadb_msg_errno = 0; 2142 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2143 2144 m_freem(m); 2145 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2146 } 2147} 2148 2149/* 2150 * SADB_SPDDELETE2 processing 2151 * receive 2152 * <base, policy(*)> 2153 * from the user(?), and set SADB_SASTATE_DEAD, 2154 * and send, 2155 * <base, policy(*)> 2156 * to the ikmpd. 2157 * policy(*) including direction of policy. 2158 * 2159 * m will always be freed. 2160 */ 2161static int 2162key_spddelete2(so, m, mhp) 2163 struct socket *so; 2164 struct mbuf *m; 2165 const struct sadb_msghdr *mhp; 2166{ 2167 u_int32_t id; 2168 struct secpolicy *sp; 2169 2170 IPSEC_ASSERT(so != NULL, ("null socket")); 2171 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2172 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2173 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2174 2175 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2176 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2177 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); 2178 return key_senderror(so, m, EINVAL); 2179 } 2180 2181 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2182 2183 /* Is there SP in SPD ? */ 2184 if ((sp = key_getspbyid(id)) == NULL) { 2185 ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2186 return key_senderror(so, m, EINVAL); 2187 } 2188 2189 SPTREE_LOCK(); 2190 sp->state = IPSEC_SPSTATE_DEAD; 2191 SPTREE_UNLOCK(); 2192 KEY_FREESP(&sp); 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 MGETHDR(n, M_DONTWAIT, MT_DATA); 2203 if (n && len > MHLEN) { 2204 MCLGET(n, M_DONTWAIT); 2205 if ((n->m_flags & M_EXT) == 0) { 2206 m_freem(n); 2207 n = NULL; 2208 } 2209 } 2210 if (!n) 2211 return key_senderror(so, m, ENOBUFS); 2212 2213 n->m_len = len; 2214 n->m_next = NULL; 2215 off = 0; 2216 2217 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2218 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2219 2220 IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)", 2221 off, len)); 2222 2223 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2224 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2225 if (!n->m_next) { 2226 m_freem(n); 2227 return key_senderror(so, m, ENOBUFS); 2228 } 2229 2230 n->m_pkthdr.len = 0; 2231 for (nn = n; nn; nn = nn->m_next) 2232 n->m_pkthdr.len += nn->m_len; 2233 2234 newmsg = mtod(n, struct sadb_msg *); 2235 newmsg->sadb_msg_errno = 0; 2236 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2237 2238 m_freem(m); 2239 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2240 } 2241} 2242 2243/* 2244 * SADB_X_GET processing 2245 * receive 2246 * <base, policy(*)> 2247 * from the user(?), 2248 * and send, 2249 * <base, address(SD), policy> 2250 * to the ikmpd. 2251 * policy(*) including direction of policy. 2252 * 2253 * m will always be freed. 2254 */ 2255static int 2256key_spdget(so, m, mhp) 2257 struct socket *so; 2258 struct mbuf *m; 2259 const struct sadb_msghdr *mhp; 2260{ 2261 u_int32_t id; 2262 struct secpolicy *sp; 2263 struct mbuf *n; 2264 2265 IPSEC_ASSERT(so != NULL, ("null socket")); 2266 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2267 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2268 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2269 2270 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2271 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2272 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2273 __func__)); 2274 return key_senderror(so, m, EINVAL); 2275 } 2276 2277 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2278 2279 /* Is there SP in SPD ? */ 2280 if ((sp = key_getspbyid(id)) == NULL) { 2281 ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2282 return key_senderror(so, m, ENOENT); 2283 } 2284 2285 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2286 if (n != NULL) { 2287 m_freem(m); 2288 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2289 } else 2290 return key_senderror(so, m, ENOBUFS); 2291} 2292 2293/* 2294 * SADB_X_SPDACQUIRE processing. 2295 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2296 * send 2297 * <base, policy(*)> 2298 * to KMD, and expect to receive 2299 * <base> with SADB_X_SPDACQUIRE if error occured, 2300 * or 2301 * <base, policy> 2302 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2303 * policy(*) is without policy requests. 2304 * 2305 * 0 : succeed 2306 * others: error number 2307 */ 2308int 2309key_spdacquire(sp) 2310 struct secpolicy *sp; 2311{ 2312 struct mbuf *result = NULL, *m; 2313 struct secspacq *newspacq; 2314 2315 IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2316 IPSEC_ASSERT(sp->req == NULL, ("policy exists")); 2317 IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 2318 ("policy not IPSEC %u", sp->policy)); 2319 2320 /* Get an entry to check whether sent message or not. */ 2321 newspacq = key_getspacq(&sp->spidx); 2322 if (newspacq != NULL) { 2323 if (V_key_blockacq_count < newspacq->count) { 2324 /* reset counter and do send message. */ 2325 newspacq->count = 0; 2326 } else { 2327 /* increment counter and do nothing. */ 2328 newspacq->count++; 2329 return 0; 2330 } 2331 SPACQ_UNLOCK(); 2332 } else { 2333 /* make new entry for blocking to send SADB_ACQUIRE. */ 2334 newspacq = key_newspacq(&sp->spidx); 2335 if (newspacq == NULL) 2336 return ENOBUFS; 2337 } 2338 2339 /* create new sadb_msg to reply. */ 2340 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2341 if (!m) 2342 return ENOBUFS; 2343 2344 result = m; 2345 2346 result->m_pkthdr.len = 0; 2347 for (m = result; m; m = m->m_next) 2348 result->m_pkthdr.len += m->m_len; 2349 2350 mtod(result, struct sadb_msg *)->sadb_msg_len = 2351 PFKEY_UNIT64(result->m_pkthdr.len); 2352 2353 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2354} 2355 2356/* 2357 * SADB_SPDFLUSH processing 2358 * receive 2359 * <base> 2360 * from the user, and free all entries in secpctree. 2361 * and send, 2362 * <base> 2363 * to the user. 2364 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2365 * 2366 * m will always be freed. 2367 */ 2368static int 2369key_spdflush(so, m, mhp) 2370 struct socket *so; 2371 struct mbuf *m; 2372 const struct sadb_msghdr *mhp; 2373{ 2374 struct sadb_msg *newmsg; 2375 struct secpolicy *sp; 2376 u_int dir; 2377 2378 IPSEC_ASSERT(so != NULL, ("null socket")); 2379 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2380 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2381 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2382 2383 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2384 return key_senderror(so, m, EINVAL); 2385 2386 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2387 SPTREE_LOCK(); 2388 LIST_FOREACH(sp, &V_sptree[dir], chain) 2389 sp->state = IPSEC_SPSTATE_DEAD; 2390 SPTREE_UNLOCK(); 2391 } 2392 2393 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2394 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2395 return key_senderror(so, m, ENOBUFS); 2396 } 2397 2398 if (m->m_next) 2399 m_freem(m->m_next); 2400 m->m_next = NULL; 2401 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2402 newmsg = mtod(m, struct sadb_msg *); 2403 newmsg->sadb_msg_errno = 0; 2404 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2405 2406 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2407} 2408 2409/* 2410 * SADB_SPDDUMP processing 2411 * receive 2412 * <base> 2413 * from the user, and dump all SP leaves 2414 * and send, 2415 * <base> ..... 2416 * to the ikmpd. 2417 * 2418 * m will always be freed. 2419 */ 2420static int 2421key_spddump(so, m, mhp) 2422 struct socket *so; 2423 struct mbuf *m; 2424 const struct sadb_msghdr *mhp; 2425{ 2426 struct secpolicy *sp; 2427 int cnt; 2428 u_int dir; 2429 struct mbuf *n; 2430 2431 IPSEC_ASSERT(so != NULL, ("null socket")); 2432 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2433 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2434 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2435 2436 /* search SPD entry and get buffer size. */ 2437 cnt = 0; 2438 SPTREE_LOCK(); 2439 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2440 LIST_FOREACH(sp, &V_sptree[dir], chain) { 2441 cnt++; 2442 } 2443 } 2444 2445 if (cnt == 0) { 2446 SPTREE_UNLOCK(); 2447 return key_senderror(so, m, ENOENT); 2448 } 2449 2450 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2451 LIST_FOREACH(sp, &V_sptree[dir], chain) { 2452 --cnt; 2453 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2454 mhp->msg->sadb_msg_pid); 2455 2456 if (n) 2457 key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2458 } 2459 } 2460 2461 SPTREE_UNLOCK(); 2462 m_freem(m); 2463 return 0; 2464} 2465 2466static struct mbuf * 2467key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) 2468{ 2469 struct mbuf *result = NULL, *m; 2470 struct seclifetime lt; 2471 2472 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2473 if (!m) 2474 goto fail; 2475 result = m; 2476 2477 /* 2478 * Note: do not send SADB_X_EXT_NAT_T_* here: 2479 * we are sending traffic endpoints. 2480 */ 2481 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2482 &sp->spidx.src.sa, sp->spidx.prefs, 2483 sp->spidx.ul_proto); 2484 if (!m) 2485 goto fail; 2486 m_cat(result, m); 2487 2488 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2489 &sp->spidx.dst.sa, sp->spidx.prefd, 2490 sp->spidx.ul_proto); 2491 if (!m) 2492 goto fail; 2493 m_cat(result, m); 2494 2495 m = key_sp2msg(sp); 2496 if (!m) 2497 goto fail; 2498 m_cat(result, m); 2499 2500 if(sp->lifetime){ 2501 lt.addtime=sp->created; 2502 lt.usetime= sp->lastused; 2503 m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT); 2504 if (!m) 2505 goto fail; 2506 m_cat(result, m); 2507 2508 lt.addtime=sp->lifetime; 2509 lt.usetime= sp->validtime; 2510 m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD); 2511 if (!m) 2512 goto fail; 2513 m_cat(result, m); 2514 } 2515 2516 if ((result->m_flags & M_PKTHDR) == 0) 2517 goto fail; 2518 2519 if (result->m_len < sizeof(struct sadb_msg)) { 2520 result = m_pullup(result, sizeof(struct sadb_msg)); 2521 if (result == NULL) 2522 goto fail; 2523 } 2524 2525 result->m_pkthdr.len = 0; 2526 for (m = result; m; m = m->m_next) 2527 result->m_pkthdr.len += m->m_len; 2528 2529 mtod(result, struct sadb_msg *)->sadb_msg_len = 2530 PFKEY_UNIT64(result->m_pkthdr.len); 2531 2532 return result; 2533 2534fail: 2535 m_freem(result); 2536 return NULL; 2537} 2538 2539/* 2540 * get PFKEY message length for security policy and request. 2541 */ 2542static u_int 2543key_getspreqmsglen(sp) 2544 struct secpolicy *sp; 2545{ 2546 u_int tlen; 2547 2548 tlen = sizeof(struct sadb_x_policy); 2549 2550 /* if is the policy for ipsec ? */ 2551 if (sp->policy != IPSEC_POLICY_IPSEC) 2552 return tlen; 2553 2554 /* get length of ipsec requests */ 2555 { 2556 struct ipsecrequest *isr; 2557 int len; 2558 2559 for (isr = sp->req; isr != NULL; isr = isr->next) { 2560 len = sizeof(struct sadb_x_ipsecrequest) 2561 + isr->saidx.src.sa.sa_len 2562 + isr->saidx.dst.sa.sa_len; 2563 2564 tlen += PFKEY_ALIGN8(len); 2565 } 2566 } 2567 2568 return tlen; 2569} 2570 2571/* 2572 * SADB_SPDEXPIRE processing 2573 * send 2574 * <base, address(SD), lifetime(CH), policy> 2575 * to KMD by PF_KEY. 2576 * 2577 * OUT: 0 : succeed 2578 * others : error number 2579 */ 2580static int 2581key_spdexpire(sp) 2582 struct secpolicy *sp; 2583{ 2584 struct mbuf *result = NULL, *m; 2585 int len; 2586 int error = -1; 2587 struct sadb_lifetime *lt; 2588 2589 /* XXX: Why do we lock ? */ 2590 2591 IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2592 2593 /* set msg header */ 2594 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2595 if (!m) { 2596 error = ENOBUFS; 2597 goto fail; 2598 } 2599 result = m; 2600 2601 /* create lifetime extension (current and hard) */ 2602 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2603 m = key_alloc_mbuf(len); 2604 if (!m || m->m_next) { /*XXX*/ 2605 if (m) 2606 m_freem(m); 2607 error = ENOBUFS; 2608 goto fail; 2609 } 2610 bzero(mtod(m, caddr_t), len); 2611 lt = mtod(m, struct sadb_lifetime *); 2612 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2613 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2614 lt->sadb_lifetime_allocations = 0; 2615 lt->sadb_lifetime_bytes = 0; 2616 lt->sadb_lifetime_addtime = sp->created; 2617 lt->sadb_lifetime_usetime = sp->lastused; 2618 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2619 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2620 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2621 lt->sadb_lifetime_allocations = 0; 2622 lt->sadb_lifetime_bytes = 0; 2623 lt->sadb_lifetime_addtime = sp->lifetime; 2624 lt->sadb_lifetime_usetime = sp->validtime; 2625 m_cat(result, m); 2626 2627 /* 2628 * Note: do not send SADB_X_EXT_NAT_T_* here: 2629 * we are sending traffic endpoints. 2630 */ 2631 2632 /* set sadb_address for source */ 2633 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2634 &sp->spidx.src.sa, 2635 sp->spidx.prefs, sp->spidx.ul_proto); 2636 if (!m) { 2637 error = ENOBUFS; 2638 goto fail; 2639 } 2640 m_cat(result, m); 2641 2642 /* set sadb_address for destination */ 2643 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2644 &sp->spidx.dst.sa, 2645 sp->spidx.prefd, sp->spidx.ul_proto); 2646 if (!m) { 2647 error = ENOBUFS; 2648 goto fail; 2649 } 2650 m_cat(result, m); 2651 2652 /* set secpolicy */ 2653 m = key_sp2msg(sp); 2654 if (!m) { 2655 error = ENOBUFS; 2656 goto fail; 2657 } 2658 m_cat(result, m); 2659 2660 if ((result->m_flags & M_PKTHDR) == 0) { 2661 error = EINVAL; 2662 goto fail; 2663 } 2664 2665 if (result->m_len < sizeof(struct sadb_msg)) { 2666 result = m_pullup(result, sizeof(struct sadb_msg)); 2667 if (result == NULL) { 2668 error = ENOBUFS; 2669 goto fail; 2670 } 2671 } 2672 2673 result->m_pkthdr.len = 0; 2674 for (m = result; m; m = m->m_next) 2675 result->m_pkthdr.len += m->m_len; 2676 2677 mtod(result, struct sadb_msg *)->sadb_msg_len = 2678 PFKEY_UNIT64(result->m_pkthdr.len); 2679 2680 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2681 2682 fail: 2683 if (result) 2684 m_freem(result); 2685 return error; 2686} 2687 2688/* %%% SAD management */ 2689/* 2690 * allocating a memory for new SA head, and copy from the values of mhp. 2691 * OUT: NULL : failure due to the lack of memory. 2692 * others : pointer to new SA head. 2693 */ 2694static struct secashead * 2695key_newsah(saidx) 2696 struct secasindex *saidx; 2697{ 2698 struct secashead *newsah; 2699 2700 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2701 2702 newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2703 if (newsah != NULL) { 2704 int i; 2705 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2706 LIST_INIT(&newsah->savtree[i]); 2707 newsah->saidx = *saidx; 2708 2709 /* add to saidxtree */ 2710 newsah->state = SADB_SASTATE_MATURE; 2711 2712 SAHTREE_LOCK(); 2713 LIST_INSERT_HEAD(&V_sahtree, newsah, chain); 2714 SAHTREE_UNLOCK(); 2715 } 2716 return(newsah); 2717} 2718 2719/* 2720 * delete SA index and all SA registerd. 2721 */ 2722static void 2723key_delsah(sah) 2724 struct secashead *sah; 2725{ 2726 struct secasvar *sav, *nextsav; 2727 u_int stateidx; 2728 int zombie = 0; 2729 2730 IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2731 SAHTREE_LOCK_ASSERT(); 2732 2733 /* searching all SA registerd in the secindex. */ 2734 for (stateidx = 0; 2735 stateidx < _ARRAYLEN(saorder_state_any); 2736 stateidx++) { 2737 u_int state = saorder_state_any[stateidx]; 2738 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2739 if (sav->refcnt == 0) { 2740 /* sanity check */ 2741 KEY_CHKSASTATE(state, sav->state, __func__); 2742 /* 2743 * do NOT call KEY_FREESAV here: 2744 * it will only delete the sav if refcnt == 1, 2745 * where we already know that refcnt == 0 2746 */ 2747 key_delsav(sav); 2748 } else { 2749 /* give up to delete this sa */ 2750 zombie++; 2751 } 2752 } 2753 } 2754 if (!zombie) { /* delete only if there are savs */ 2755 /* remove from tree of SA index */ 2756 if (__LIST_CHAINED(sah)) 2757 LIST_REMOVE(sah, chain); 2758 if (sah->route_cache.sa_route.ro_rt) { 2759 RTFREE(sah->route_cache.sa_route.ro_rt); 2760 sah->route_cache.sa_route.ro_rt = (struct rtentry *)NULL; 2761 } 2762 free(sah, M_IPSEC_SAH); 2763 } 2764} 2765 2766/* 2767 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2768 * and copy the values of mhp into new buffer. 2769 * When SAD message type is GETSPI: 2770 * to set sequence number from acq_seq++, 2771 * to set zero to SPI. 2772 * not to call key_setsava(). 2773 * OUT: NULL : fail 2774 * others : pointer to new secasvar. 2775 * 2776 * does not modify mbuf. does not free mbuf on error. 2777 */ 2778static struct secasvar * 2779key_newsav(m, mhp, sah, errp, where, tag) 2780 struct mbuf *m; 2781 const struct sadb_msghdr *mhp; 2782 struct secashead *sah; 2783 int *errp; 2784 const char* where; 2785 int tag; 2786{ 2787 struct secasvar *newsav; 2788 const struct sadb_sa *xsa; 2789 2790 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2791 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2792 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2793 IPSEC_ASSERT(sah != NULL, ("null secashead")); 2794 2795 newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2796 if (newsav == NULL) { 2797 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2798 *errp = ENOBUFS; 2799 goto done; 2800 } 2801 2802 switch (mhp->msg->sadb_msg_type) { 2803 case SADB_GETSPI: 2804 newsav->spi = 0; 2805 2806#ifdef IPSEC_DOSEQCHECK 2807 /* sync sequence number */ 2808 if (mhp->msg->sadb_msg_seq == 0) 2809 newsav->seq = 2810 (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); 2811 else 2812#endif 2813 newsav->seq = mhp->msg->sadb_msg_seq; 2814 break; 2815 2816 case SADB_ADD: 2817 /* sanity check */ 2818 if (mhp->ext[SADB_EXT_SA] == NULL) { 2819 free(newsav, M_IPSEC_SA); 2820 newsav = NULL; 2821 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2822 __func__)); 2823 *errp = EINVAL; 2824 goto done; 2825 } 2826 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2827 newsav->spi = xsa->sadb_sa_spi; 2828 newsav->seq = mhp->msg->sadb_msg_seq; 2829 break; 2830 default: 2831 free(newsav, M_IPSEC_SA); 2832 newsav = NULL; 2833 *errp = EINVAL; 2834 goto done; 2835 } 2836 2837 2838 /* copy sav values */ 2839 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2840 *errp = key_setsaval(newsav, m, mhp); 2841 if (*errp) { 2842 free(newsav, M_IPSEC_SA); 2843 newsav = NULL; 2844 goto done; 2845 } 2846 } 2847 2848 SECASVAR_LOCK_INIT(newsav); 2849 2850 /* reset created */ 2851 newsav->created = time_second; 2852 newsav->pid = mhp->msg->sadb_msg_pid; 2853 2854 /* add to satree */ 2855 newsav->sah = sah; 2856 sa_initref(newsav); 2857 newsav->state = SADB_SASTATE_LARVAL; 2858 2859 SAHTREE_LOCK(); 2860 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2861 secasvar, chain); 2862 SAHTREE_UNLOCK(); 2863done: 2864 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2865 printf("DP %s from %s:%u return SP:%p\n", __func__, 2866 where, tag, newsav)); 2867 2868 return newsav; 2869} 2870 2871/* 2872 * free() SA variable entry. 2873 */ 2874static void 2875key_cleansav(struct secasvar *sav) 2876{ 2877 /* 2878 * Cleanup xform state. Note that zeroize'ing causes the 2879 * keys to be cleared; otherwise we must do it ourself. 2880 */ 2881 if (sav->tdb_xform != NULL) { 2882 sav->tdb_xform->xf_zeroize(sav); 2883 sav->tdb_xform = NULL; 2884 } else { 2885 KASSERT(sav->iv == NULL, ("iv but no xform")); 2886 if (sav->key_auth != NULL) 2887 bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); 2888 if (sav->key_enc != NULL) 2889 bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc)); 2890 } 2891 if (sav->key_auth != NULL) { 2892 if (sav->key_auth->key_data != NULL) 2893 free(sav->key_auth->key_data, M_IPSEC_MISC); 2894 free(sav->key_auth, M_IPSEC_MISC); 2895 sav->key_auth = NULL; 2896 } 2897 if (sav->key_enc != NULL) { 2898 if (sav->key_enc->key_data != NULL) 2899 free(sav->key_enc->key_data, M_IPSEC_MISC); 2900 free(sav->key_enc, M_IPSEC_MISC); 2901 sav->key_enc = NULL; 2902 } 2903 if (sav->sched) { 2904 bzero(sav->sched, sav->schedlen); 2905 free(sav->sched, M_IPSEC_MISC); 2906 sav->sched = NULL; 2907 } 2908 if (sav->replay != NULL) { 2909 free(sav->replay, M_IPSEC_MISC); 2910 sav->replay = NULL; 2911 } 2912 if (sav->lft_c != NULL) { 2913 free(sav->lft_c, M_IPSEC_MISC); 2914 sav->lft_c = NULL; 2915 } 2916 if (sav->lft_h != NULL) { 2917 free(sav->lft_h, M_IPSEC_MISC); 2918 sav->lft_h = NULL; 2919 } 2920 if (sav->lft_s != NULL) { 2921 free(sav->lft_s, M_IPSEC_MISC); 2922 sav->lft_s = NULL; 2923 } 2924} 2925 2926/* 2927 * free() SA variable entry. 2928 */ 2929static void 2930key_delsav(sav) 2931 struct secasvar *sav; 2932{ 2933 IPSEC_ASSERT(sav != NULL, ("null sav")); 2934 IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2935 2936 /* remove from SA header */ 2937 if (__LIST_CHAINED(sav)) 2938 LIST_REMOVE(sav, chain); 2939 key_cleansav(sav); 2940 SECASVAR_LOCK_DESTROY(sav); 2941 free(sav, M_IPSEC_SA); 2942} 2943 2944/* 2945 * search SAD. 2946 * OUT: 2947 * NULL : not found 2948 * others : found, pointer to a SA. 2949 */ 2950static struct secashead * 2951key_getsah(saidx) 2952 struct secasindex *saidx; 2953{ 2954 struct secashead *sah; 2955 2956 SAHTREE_LOCK(); 2957 LIST_FOREACH(sah, &V_sahtree, chain) { 2958 if (sah->state == SADB_SASTATE_DEAD) 2959 continue; 2960 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2961 break; 2962 } 2963 SAHTREE_UNLOCK(); 2964 2965 return sah; 2966} 2967 2968/* 2969 * check not to be duplicated SPI. 2970 * NOTE: this function is too slow due to searching all SAD. 2971 * OUT: 2972 * NULL : not found 2973 * others : found, pointer to a SA. 2974 */ 2975static struct secasvar * 2976key_checkspidup(saidx, spi) 2977 struct secasindex *saidx; 2978 u_int32_t spi; 2979{ 2980 struct secashead *sah; 2981 struct secasvar *sav; 2982 2983 /* check address family */ 2984 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2985 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2986 __func__)); 2987 return NULL; 2988 } 2989 2990 sav = NULL; 2991 /* check all SAD */ 2992 SAHTREE_LOCK(); 2993 LIST_FOREACH(sah, &V_sahtree, chain) { 2994 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 2995 continue; 2996 sav = key_getsavbyspi(sah, spi); 2997 if (sav != NULL) 2998 break; 2999 } 3000 SAHTREE_UNLOCK(); 3001 3002 return sav; 3003} 3004 3005/* 3006 * search SAD litmited alive SA, protocol, SPI. 3007 * OUT: 3008 * NULL : not found 3009 * others : found, pointer to a SA. 3010 */ 3011static struct secasvar * 3012key_getsavbyspi(sah, spi) 3013 struct secashead *sah; 3014 u_int32_t spi; 3015{ 3016 struct secasvar *sav; 3017 u_int stateidx, state; 3018 3019 sav = NULL; 3020 SAHTREE_LOCK_ASSERT(); 3021 /* search all status */ 3022 for (stateidx = 0; 3023 stateidx < _ARRAYLEN(saorder_state_alive); 3024 stateidx++) { 3025 3026 state = saorder_state_alive[stateidx]; 3027 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3028 3029 /* sanity check */ 3030 if (sav->state != state) { 3031 ipseclog((LOG_DEBUG, "%s: " 3032 "invalid sav->state (queue: %d SA: %d)\n", 3033 __func__, state, sav->state)); 3034 continue; 3035 } 3036 3037 if (sav->spi == spi) 3038 return sav; 3039 } 3040 } 3041 3042 return NULL; 3043} 3044 3045/* 3046 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3047 * You must update these if need. 3048 * OUT: 0: success. 3049 * !0: failure. 3050 * 3051 * does not modify mbuf. does not free mbuf on error. 3052 */ 3053static int 3054key_setsaval(sav, m, mhp) 3055 struct secasvar *sav; 3056 struct mbuf *m; 3057 const struct sadb_msghdr *mhp; 3058{ 3059 int error = 0; 3060 3061 IPSEC_ASSERT(m != NULL, ("null mbuf")); 3062 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 3063 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 3064 3065 /* initialization */ 3066 sav->replay = NULL; 3067 sav->key_auth = NULL; 3068 sav->key_enc = NULL; 3069 sav->sched = NULL; 3070 sav->schedlen = 0; 3071 sav->iv = NULL; 3072 sav->lft_c = NULL; 3073 sav->lft_h = NULL; 3074 sav->lft_s = NULL; 3075 sav->tdb_xform = NULL; /* transform */ 3076 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3077 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3078 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3079 /* Initialize even if NAT-T not compiled in: */ 3080 sav->natt_type = 0; 3081 sav->natt_esp_frag_len = 0; 3082 3083 /* SA */ 3084 if (mhp->ext[SADB_EXT_SA] != NULL) { 3085 const struct sadb_sa *sa0; 3086 3087 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3088 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3089 error = EINVAL; 3090 goto fail; 3091 } 3092 3093 sav->alg_auth = sa0->sadb_sa_auth; 3094 sav->alg_enc = sa0->sadb_sa_encrypt; 3095 sav->flags = sa0->sadb_sa_flags; 3096 3097 /* replay window */ 3098 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3099 sav->replay = (struct secreplay *) 3100 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 3101 if (sav->replay == NULL) { 3102 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3103 __func__)); 3104 error = ENOBUFS; 3105 goto fail; 3106 } 3107 if (sa0->sadb_sa_replay != 0) 3108 sav->replay->bitmap = (caddr_t)(sav->replay+1); 3109 sav->replay->wsize = sa0->sadb_sa_replay; 3110 } 3111 } 3112 3113 /* Authentication keys */ 3114 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3115 const struct sadb_key *key0; 3116 int len; 3117 3118 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3119 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3120 3121 error = 0; 3122 if (len < sizeof(*key0)) { 3123 error = EINVAL; 3124 goto fail; 3125 } 3126 switch (mhp->msg->sadb_msg_satype) { 3127 case SADB_SATYPE_AH: 3128 case SADB_SATYPE_ESP: 3129 case SADB_X_SATYPE_TCPSIGNATURE: 3130 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3131 sav->alg_auth != SADB_X_AALG_NULL) 3132 error = EINVAL; 3133 break; 3134 case SADB_X_SATYPE_IPCOMP: 3135 default: 3136 error = EINVAL; 3137 break; 3138 } 3139 if (error) { 3140 ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3141 __func__)); 3142 goto fail; 3143 } 3144 3145 sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, 3146 M_IPSEC_MISC); 3147 if (sav->key_auth == NULL ) { 3148 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3149 __func__)); 3150 error = ENOBUFS; 3151 goto fail; 3152 } 3153 } 3154 3155 /* Encryption key */ 3156 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3157 const struct sadb_key *key0; 3158 int len; 3159 3160 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3161 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3162 3163 error = 0; 3164 if (len < sizeof(*key0)) { 3165 error = EINVAL; 3166 goto fail; 3167 } 3168 switch (mhp->msg->sadb_msg_satype) { 3169 case SADB_SATYPE_ESP: 3170 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3171 sav->alg_enc != SADB_EALG_NULL) { 3172 error = EINVAL; 3173 break; 3174 } 3175 sav->key_enc = (struct seckey *)key_dup_keymsg(key0, 3176 len, 3177 M_IPSEC_MISC); 3178 if (sav->key_enc == NULL) { 3179 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3180 __func__)); 3181 error = ENOBUFS; 3182 goto fail; 3183 } 3184 break; 3185 case SADB_X_SATYPE_IPCOMP: 3186 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3187 error = EINVAL; 3188 sav->key_enc = NULL; /*just in case*/ 3189 break; 3190 case SADB_SATYPE_AH: 3191 case SADB_X_SATYPE_TCPSIGNATURE: 3192 default: 3193 error = EINVAL; 3194 break; 3195 } 3196 if (error) { 3197 ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3198 __func__)); 3199 goto fail; 3200 } 3201 } 3202 3203 /* set iv */ 3204 sav->ivlen = 0; 3205 3206 switch (mhp->msg->sadb_msg_satype) { 3207 case SADB_SATYPE_AH: 3208 error = xform_init(sav, XF_AH); 3209 break; 3210 case SADB_SATYPE_ESP: 3211 error = xform_init(sav, XF_ESP); 3212 break; 3213 case SADB_X_SATYPE_IPCOMP: 3214 error = xform_init(sav, XF_IPCOMP); 3215 break; 3216 case SADB_X_SATYPE_TCPSIGNATURE: 3217 error = xform_init(sav, XF_TCPSIGNATURE); 3218 break; 3219 } 3220 if (error) { 3221 ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3222 __func__, mhp->msg->sadb_msg_satype)); 3223 goto fail; 3224 } 3225 3226 /* reset created */ 3227 sav->created = time_second; 3228 3229 /* make lifetime for CURRENT */ 3230 sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); 3231 if (sav->lft_c == NULL) { 3232 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3233 error = ENOBUFS; 3234 goto fail; 3235 } 3236 3237 sav->lft_c->allocations = 0; 3238 sav->lft_c->bytes = 0; 3239 sav->lft_c->addtime = time_second; 3240 sav->lft_c->usetime = 0; 3241 3242 /* lifetimes for HARD and SOFT */ 3243 { 3244 const struct sadb_lifetime *lft0; 3245 3246 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3247 if (lft0 != NULL) { 3248 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3249 error = EINVAL; 3250 goto fail; 3251 } 3252 sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3253 if (sav->lft_h == NULL) { 3254 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3255 error = ENOBUFS; 3256 goto fail; 3257 } 3258 /* to be initialize ? */ 3259 } 3260 3261 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3262 if (lft0 != NULL) { 3263 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3264 error = EINVAL; 3265 goto fail; 3266 } 3267 sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3268 if (sav->lft_s == NULL) { 3269 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3270 error = ENOBUFS; 3271 goto fail; 3272 } 3273 /* to be initialize ? */ 3274 } 3275 } 3276 3277 return 0; 3278 3279 fail: 3280 /* initialization */ 3281 key_cleansav(sav); 3282 3283 return error; 3284} 3285 3286/* 3287 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3288 * OUT: 0: valid 3289 * other: errno 3290 */ 3291static int 3292key_mature(struct secasvar *sav) 3293{ 3294 int error; 3295 3296 /* check SPI value */ 3297 switch (sav->sah->saidx.proto) { 3298 case IPPROTO_ESP: 3299 case IPPROTO_AH: 3300 /* 3301 * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values 3302 * 1-255 reserved by IANA for future use, 3303 * 0 for implementation specific, local use. 3304 */ 3305 if (ntohl(sav->spi) <= 255) { 3306 ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3307 __func__, (u_int32_t)ntohl(sav->spi))); 3308 return EINVAL; 3309 } 3310 break; 3311 } 3312 3313 /* check satype */ 3314 switch (sav->sah->saidx.proto) { 3315 case IPPROTO_ESP: 3316 /* check flags */ 3317 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3318 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3319 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3320 "given to old-esp.\n", __func__)); 3321 return EINVAL; 3322 } 3323 error = xform_init(sav, XF_ESP); 3324 break; 3325 case IPPROTO_AH: 3326 /* check flags */ 3327 if (sav->flags & SADB_X_EXT_DERIV) { 3328 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3329 "given to AH SA.\n", __func__)); 3330 return EINVAL; 3331 } 3332 if (sav->alg_enc != SADB_EALG_NONE) { 3333 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3334 "mismated.\n", __func__)); 3335 return(EINVAL); 3336 } 3337 error = xform_init(sav, XF_AH); 3338 break; 3339 case IPPROTO_IPCOMP: 3340 if (sav->alg_auth != SADB_AALG_NONE) { 3341 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3342 "mismated.\n", __func__)); 3343 return(EINVAL); 3344 } 3345 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3346 && ntohl(sav->spi) >= 0x10000) { 3347 ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3348 __func__)); 3349 return(EINVAL); 3350 } 3351 error = xform_init(sav, XF_IPCOMP); 3352 break; 3353 case IPPROTO_TCP: 3354 if (sav->alg_enc != SADB_EALG_NONE) { 3355 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3356 "mismated.\n", __func__)); 3357 return(EINVAL); 3358 } 3359 error = xform_init(sav, XF_TCPSIGNATURE); 3360 break; 3361 default: 3362 ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3363 error = EPROTONOSUPPORT; 3364 break; 3365 } 3366 if (error == 0) { 3367 SAHTREE_LOCK(); 3368 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3369 SAHTREE_UNLOCK(); 3370 } 3371 return (error); 3372} 3373 3374/* 3375 * subroutine for SADB_GET and SADB_DUMP. 3376 */ 3377static struct mbuf * 3378key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3379 u_int32_t seq, u_int32_t pid) 3380{ 3381 struct mbuf *result = NULL, *tres = NULL, *m; 3382 int i; 3383 int dumporder[] = { 3384 SADB_EXT_SA, SADB_X_EXT_SA2, 3385 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3386 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3387 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3388 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3389 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3390#ifdef IPSEC_NAT_T 3391 SADB_X_EXT_NAT_T_TYPE, 3392 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3393 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3394 SADB_X_EXT_NAT_T_FRAG, 3395#endif 3396 }; 3397 3398 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3399 if (m == NULL) 3400 goto fail; 3401 result = m; 3402 3403 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3404 m = NULL; 3405 switch (dumporder[i]) { 3406 case SADB_EXT_SA: 3407 m = key_setsadbsa(sav); 3408 if (!m) 3409 goto fail; 3410 break; 3411 3412 case SADB_X_EXT_SA2: 3413 m = key_setsadbxsa2(sav->sah->saidx.mode, 3414 sav->replay ? sav->replay->count : 0, 3415 sav->sah->saidx.reqid); 3416 if (!m) 3417 goto fail; 3418 break; 3419 3420 case SADB_EXT_ADDRESS_SRC: 3421 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3422 &sav->sah->saidx.src.sa, 3423 FULLMASK, IPSEC_ULPROTO_ANY); 3424 if (!m) 3425 goto fail; 3426 break; 3427 3428 case SADB_EXT_ADDRESS_DST: 3429 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3430 &sav->sah->saidx.dst.sa, 3431 FULLMASK, IPSEC_ULPROTO_ANY); 3432 if (!m) 3433 goto fail; 3434 break; 3435 3436 case SADB_EXT_KEY_AUTH: 3437 if (!sav->key_auth) 3438 continue; 3439 m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH); 3440 if (!m) 3441 goto fail; 3442 break; 3443 3444 case SADB_EXT_KEY_ENCRYPT: 3445 if (!sav->key_enc) 3446 continue; 3447 m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT); 3448 if (!m) 3449 goto fail; 3450 break; 3451 3452 case SADB_EXT_LIFETIME_CURRENT: 3453 if (!sav->lft_c) 3454 continue; 3455 m = key_setlifetime(sav->lft_c, 3456 SADB_EXT_LIFETIME_CURRENT); 3457 if (!m) 3458 goto fail; 3459 break; 3460 3461 case SADB_EXT_LIFETIME_HARD: 3462 if (!sav->lft_h) 3463 continue; 3464 m = key_setlifetime(sav->lft_h, 3465 SADB_EXT_LIFETIME_HARD); 3466 if (!m) 3467 goto fail; 3468 break; 3469 3470 case SADB_EXT_LIFETIME_SOFT: 3471 if (!sav->lft_s) 3472 continue; 3473 m = key_setlifetime(sav->lft_s, 3474 SADB_EXT_LIFETIME_SOFT); 3475 3476 if (!m) 3477 goto fail; 3478 break; 3479 3480#ifdef IPSEC_NAT_T 3481 case SADB_X_EXT_NAT_T_TYPE: 3482 m = key_setsadbxtype(sav->natt_type); 3483 if (!m) 3484 goto fail; 3485 break; 3486 3487 case SADB_X_EXT_NAT_T_DPORT: 3488 m = key_setsadbxport( 3489 KEY_PORTFROMSADDR(&sav->sah->saidx.dst), 3490 SADB_X_EXT_NAT_T_DPORT); 3491 if (!m) 3492 goto fail; 3493 break; 3494 3495 case SADB_X_EXT_NAT_T_SPORT: 3496 m = key_setsadbxport( 3497 KEY_PORTFROMSADDR(&sav->sah->saidx.src), 3498 SADB_X_EXT_NAT_T_SPORT); 3499 if (!m) 3500 goto fail; 3501 break; 3502 3503 case SADB_X_EXT_NAT_T_OAI: 3504 case SADB_X_EXT_NAT_T_OAR: 3505 case SADB_X_EXT_NAT_T_FRAG: 3506 /* We do not (yet) support those. */ 3507 continue; 3508#endif 3509 3510 case SADB_EXT_ADDRESS_PROXY: 3511 case SADB_EXT_IDENTITY_SRC: 3512 case SADB_EXT_IDENTITY_DST: 3513 /* XXX: should we brought from SPD ? */ 3514 case SADB_EXT_SENSITIVITY: 3515 default: 3516 continue; 3517 } 3518 3519 if (!m) 3520 goto fail; 3521 if (tres) 3522 m_cat(m, tres); 3523 tres = m; 3524 3525 } 3526 3527 m_cat(result, tres); 3528 if (result->m_len < sizeof(struct sadb_msg)) { 3529 result = m_pullup(result, sizeof(struct sadb_msg)); 3530 if (result == NULL) 3531 goto fail; 3532 } 3533 3534 result->m_pkthdr.len = 0; 3535 for (m = result; m; m = m->m_next) 3536 result->m_pkthdr.len += m->m_len; 3537 3538 mtod(result, struct sadb_msg *)->sadb_msg_len = 3539 PFKEY_UNIT64(result->m_pkthdr.len); 3540 3541 return result; 3542 3543fail: 3544 m_freem(result); 3545 m_freem(tres); 3546 return NULL; 3547} 3548 3549/* 3550 * set data into sadb_msg. 3551 */ 3552static struct mbuf * 3553key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, 3554 pid_t pid, u_int16_t reserved) 3555{ 3556 struct mbuf *m; 3557 struct sadb_msg *p; 3558 int len; 3559 3560 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3561 if (len > MCLBYTES) 3562 return NULL; 3563 MGETHDR(m, M_DONTWAIT, MT_DATA); 3564 if (m && len > MHLEN) { 3565 MCLGET(m, M_DONTWAIT); 3566 if ((m->m_flags & M_EXT) == 0) { 3567 m_freem(m); 3568 m = NULL; 3569 } 3570 } 3571 if (!m) 3572 return NULL; 3573 m->m_pkthdr.len = m->m_len = len; 3574 m->m_next = NULL; 3575 3576 p = mtod(m, struct sadb_msg *); 3577 3578 bzero(p, len); 3579 p->sadb_msg_version = PF_KEY_V2; 3580 p->sadb_msg_type = type; 3581 p->sadb_msg_errno = 0; 3582 p->sadb_msg_satype = satype; 3583 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3584 p->sadb_msg_reserved = reserved; 3585 p->sadb_msg_seq = seq; 3586 p->sadb_msg_pid = (u_int32_t)pid; 3587 3588 return m; 3589} 3590 3591/* 3592 * copy secasvar data into sadb_address. 3593 */ 3594static struct mbuf * 3595key_setsadbsa(sav) 3596 struct secasvar *sav; 3597{ 3598 struct mbuf *m; 3599 struct sadb_sa *p; 3600 int len; 3601 3602 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3603 m = key_alloc_mbuf(len); 3604 if (!m || m->m_next) { /*XXX*/ 3605 if (m) 3606 m_freem(m); 3607 return NULL; 3608 } 3609 3610 p = mtod(m, struct sadb_sa *); 3611 3612 bzero(p, len); 3613 p->sadb_sa_len = PFKEY_UNIT64(len); 3614 p->sadb_sa_exttype = SADB_EXT_SA; 3615 p->sadb_sa_spi = sav->spi; 3616 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3617 p->sadb_sa_state = sav->state; 3618 p->sadb_sa_auth = sav->alg_auth; 3619 p->sadb_sa_encrypt = sav->alg_enc; 3620 p->sadb_sa_flags = sav->flags; 3621 3622 return m; 3623} 3624 3625/* 3626 * set data into sadb_address. 3627 */ 3628static struct mbuf * 3629key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto) 3630{ 3631 struct mbuf *m; 3632 struct sadb_address *p; 3633 size_t len; 3634 3635 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3636 PFKEY_ALIGN8(saddr->sa_len); 3637 m = key_alloc_mbuf(len); 3638 if (!m || m->m_next) { /*XXX*/ 3639 if (m) 3640 m_freem(m); 3641 return NULL; 3642 } 3643 3644 p = mtod(m, struct sadb_address *); 3645 3646 bzero(p, len); 3647 p->sadb_address_len = PFKEY_UNIT64(len); 3648 p->sadb_address_exttype = exttype; 3649 p->sadb_address_proto = ul_proto; 3650 if (prefixlen == FULLMASK) { 3651 switch (saddr->sa_family) { 3652 case AF_INET: 3653 prefixlen = sizeof(struct in_addr) << 3; 3654 break; 3655 case AF_INET6: 3656 prefixlen = sizeof(struct in6_addr) << 3; 3657 break; 3658 default: 3659 ; /*XXX*/ 3660 } 3661 } 3662 p->sadb_address_prefixlen = prefixlen; 3663 p->sadb_address_reserved = 0; 3664 3665 bcopy(saddr, 3666 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3667 saddr->sa_len); 3668 3669 return m; 3670} 3671 3672/* 3673 * set data into sadb_x_sa2. 3674 */ 3675static struct mbuf * 3676key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) 3677{ 3678 struct mbuf *m; 3679 struct sadb_x_sa2 *p; 3680 size_t len; 3681 3682 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3683 m = key_alloc_mbuf(len); 3684 if (!m || m->m_next) { /*XXX*/ 3685 if (m) 3686 m_freem(m); 3687 return NULL; 3688 } 3689 3690 p = mtod(m, struct sadb_x_sa2 *); 3691 3692 bzero(p, len); 3693 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3694 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3695 p->sadb_x_sa2_mode = mode; 3696 p->sadb_x_sa2_reserved1 = 0; 3697 p->sadb_x_sa2_reserved2 = 0; 3698 p->sadb_x_sa2_sequence = seq; 3699 p->sadb_x_sa2_reqid = reqid; 3700 3701 return m; 3702} 3703 3704#ifdef IPSEC_NAT_T 3705/* 3706 * Set a type in sadb_x_nat_t_type. 3707 */ 3708static struct mbuf * 3709key_setsadbxtype(u_int16_t type) 3710{ 3711 struct mbuf *m; 3712 size_t len; 3713 struct sadb_x_nat_t_type *p; 3714 3715 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3716 3717 m = key_alloc_mbuf(len); 3718 if (!m || m->m_next) { /*XXX*/ 3719 if (m) 3720 m_freem(m); 3721 return (NULL); 3722 } 3723 3724 p = mtod(m, struct sadb_x_nat_t_type *); 3725 3726 bzero(p, len); 3727 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3728 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3729 p->sadb_x_nat_t_type_type = type; 3730 3731 return (m); 3732} 3733/* 3734 * Set a port in sadb_x_nat_t_port. 3735 * In contrast to default RFC 2367 behaviour, port is in network byte order. 3736 */ 3737static struct mbuf * 3738key_setsadbxport(u_int16_t port, u_int16_t type) 3739{ 3740 struct mbuf *m; 3741 size_t len; 3742 struct sadb_x_nat_t_port *p; 3743 3744 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3745 3746 m = key_alloc_mbuf(len); 3747 if (!m || m->m_next) { /*XXX*/ 3748 if (m) 3749 m_freem(m); 3750 return (NULL); 3751 } 3752 3753 p = mtod(m, struct sadb_x_nat_t_port *); 3754 3755 bzero(p, len); 3756 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3757 p->sadb_x_nat_t_port_exttype = type; 3758 p->sadb_x_nat_t_port_port = port; 3759 3760 return (m); 3761} 3762 3763/* 3764 * Get port from sockaddr. Port is in network byte order. 3765 */ 3766u_int16_t 3767key_portfromsaddr(struct sockaddr *sa) 3768{ 3769 3770 switch (sa->sa_family) { 3771#ifdef INET 3772 case AF_INET: 3773 return ((struct sockaddr_in *)sa)->sin_port; 3774#endif 3775#ifdef INET6 3776 case AF_INET6: 3777 return ((struct sockaddr_in6 *)sa)->sin6_port; 3778#endif 3779 } 3780 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3781 printf("DP %s unexpected address family %d\n", 3782 __func__, sa->sa_family)); 3783 return (0); 3784} 3785#endif /* IPSEC_NAT_T */ 3786 3787/* 3788 * Set port in struct sockaddr. Port is in network byte order. 3789 */ 3790static void 3791key_porttosaddr(struct sockaddr *sa, u_int16_t port) 3792{ 3793 3794 switch (sa->sa_family) { 3795#ifdef INET 3796 case AF_INET: 3797 ((struct sockaddr_in *)sa)->sin_port = port; 3798 break; 3799#endif 3800#ifdef INET6 3801 case AF_INET6: 3802 ((struct sockaddr_in6 *)sa)->sin6_port = port; 3803 break; 3804#endif 3805 default: 3806 ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n", 3807 __func__, sa->sa_family)); 3808 break; 3809 } 3810} 3811 3812/* 3813 * set data into sadb_x_policy 3814 */ 3815static struct mbuf * 3816key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3817{ 3818 struct mbuf *m; 3819 struct sadb_x_policy *p; 3820 size_t len; 3821 3822 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3823 m = key_alloc_mbuf(len); 3824 if (!m || m->m_next) { /*XXX*/ 3825 if (m) 3826 m_freem(m); 3827 return NULL; 3828 } 3829 3830 p = mtod(m, struct sadb_x_policy *); 3831 3832 bzero(p, len); 3833 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3834 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3835 p->sadb_x_policy_type = type; 3836 p->sadb_x_policy_dir = dir; 3837 p->sadb_x_policy_id = id; 3838 3839 return m; 3840} 3841 3842/* %%% utilities */ 3843/* Take a key message (sadb_key) from the socket and turn it into one 3844 * of the kernel's key structures (seckey). 3845 * 3846 * IN: pointer to the src 3847 * OUT: NULL no more memory 3848 */ 3849struct seckey * 3850key_dup_keymsg(const struct sadb_key *src, u_int len, 3851 struct malloc_type *type) 3852{ 3853 struct seckey *dst; 3854 dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); 3855 if (dst != NULL) { 3856 dst->bits = src->sadb_key_bits; 3857 dst->key_data = (char *)malloc(len, type, M_NOWAIT); 3858 if (dst->key_data != NULL) { 3859 bcopy((const char *)src + sizeof(struct sadb_key), 3860 dst->key_data, len); 3861 } else { 3862 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3863 __func__)); 3864 free(dst, type); 3865 dst = NULL; 3866 } 3867 } else { 3868 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3869 __func__)); 3870 3871 } 3872 return dst; 3873} 3874 3875/* Take a lifetime message (sadb_lifetime) passed in on a socket and 3876 * turn it into one of the kernel's lifetime structures (seclifetime). 3877 * 3878 * IN: pointer to the destination, source and malloc type 3879 * OUT: NULL, no more memory 3880 */ 3881 3882static struct seclifetime * 3883key_dup_lifemsg(const struct sadb_lifetime *src, 3884 struct malloc_type *type) 3885{ 3886 struct seclifetime *dst = NULL; 3887 3888 dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), 3889 type, M_NOWAIT); 3890 if (dst == NULL) { 3891 /* XXX counter */ 3892 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3893 } else { 3894 dst->allocations = src->sadb_lifetime_allocations; 3895 dst->bytes = src->sadb_lifetime_bytes; 3896 dst->addtime = src->sadb_lifetime_addtime; 3897 dst->usetime = src->sadb_lifetime_usetime; 3898 } 3899 return dst; 3900} 3901 3902/* compare my own address 3903 * OUT: 1: true, i.e. my address. 3904 * 0: false 3905 */ 3906int 3907key_ismyaddr(sa) 3908 struct sockaddr *sa; 3909{ 3910#ifdef INET 3911 struct sockaddr_in *sin; 3912 struct in_ifaddr *ia; 3913#endif 3914 3915 IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3916 3917 switch (sa->sa_family) { 3918#ifdef INET 3919 case AF_INET: 3920 sin = (struct sockaddr_in *)sa; 3921 IN_IFADDR_RLOCK(); 3922 for (ia = V_in_ifaddrhead.tqh_first; ia; 3923 ia = ia->ia_link.tqe_next) 3924 { 3925 if (sin->sin_family == ia->ia_addr.sin_family && 3926 sin->sin_len == ia->ia_addr.sin_len && 3927 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3928 { 3929 IN_IFADDR_RUNLOCK(); 3930 return 1; 3931 } 3932 } 3933 IN_IFADDR_RUNLOCK(); 3934 break; 3935#endif 3936#ifdef INET6 3937 case AF_INET6: 3938 return key_ismyaddr6((struct sockaddr_in6 *)sa); 3939#endif 3940 } 3941 3942 return 0; 3943} 3944 3945#ifdef INET6 3946/* 3947 * compare my own address for IPv6. 3948 * 1: ours 3949 * 0: other 3950 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3951 */ 3952#include <netinet6/in6_var.h> 3953 3954static int 3955key_ismyaddr6(sin6) 3956 struct sockaddr_in6 *sin6; 3957{ 3958 struct in6_ifaddr *ia; 3959#if 0 3960 struct in6_multi *in6m; 3961#endif 3962 3963 IN6_IFADDR_RLOCK(); 3964 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 3965 if (key_sockaddrcmp((struct sockaddr *)&sin6, 3966 (struct sockaddr *)&ia->ia_addr, 0) == 0) { 3967 IN6_IFADDR_RUNLOCK(); 3968 return 1; 3969 } 3970 3971#if 0 3972 /* 3973 * XXX Multicast 3974 * XXX why do we care about multlicast here while we don't care 3975 * about IPv4 multicast?? 3976 * XXX scope 3977 */ 3978 in6m = NULL; 3979 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3980 if (in6m) { 3981 IN6_IFADDR_RUNLOCK(); 3982 return 1; 3983 } 3984#endif 3985 } 3986 IN6_IFADDR_RUNLOCK(); 3987 3988 /* loopback, just for safety */ 3989 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3990 return 1; 3991 3992 return 0; 3993} 3994#endif /*INET6*/ 3995 3996/* 3997 * compare two secasindex structure. 3998 * flag can specify to compare 2 saidxes. 3999 * compare two secasindex structure without both mode and reqid. 4000 * don't compare port. 4001 * IN: 4002 * saidx0: source, it can be in SAD. 4003 * saidx1: object. 4004 * OUT: 4005 * 1 : equal 4006 * 0 : not equal 4007 */ 4008static int 4009key_cmpsaidx( 4010 const struct secasindex *saidx0, 4011 const struct secasindex *saidx1, 4012 int flag) 4013{ 4014 int chkport = 0; 4015 4016 /* sanity */ 4017 if (saidx0 == NULL && saidx1 == NULL) 4018 return 1; 4019 4020 if (saidx0 == NULL || saidx1 == NULL) 4021 return 0; 4022 4023 if (saidx0->proto != saidx1->proto) 4024 return 0; 4025 4026 if (flag == CMP_EXACTLY) { 4027 if (saidx0->mode != saidx1->mode) 4028 return 0; 4029 if (saidx0->reqid != saidx1->reqid) 4030 return 0; 4031 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4032 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4033 return 0; 4034 } else { 4035 4036 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4037 if (flag == CMP_MODE_REQID 4038 ||flag == CMP_REQID) { 4039 /* 4040 * If reqid of SPD is non-zero, unique SA is required. 4041 * The result must be of same reqid in this case. 4042 */ 4043 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4044 return 0; 4045 } 4046 4047 if (flag == CMP_MODE_REQID) { 4048 if (saidx0->mode != IPSEC_MODE_ANY 4049 && saidx0->mode != saidx1->mode) 4050 return 0; 4051 } 4052 4053#ifdef IPSEC_NAT_T 4054 /* 4055 * If NAT-T is enabled, check ports for tunnel mode. 4056 * Do not check ports if they are set to zero in the SPD. 4057 * Also do not do it for transport mode, as there is no 4058 * port information available in the SP. 4059 */ 4060 if (saidx1->mode == IPSEC_MODE_TUNNEL && 4061 saidx1->src.sa.sa_family == AF_INET && 4062 saidx1->dst.sa.sa_family == AF_INET && 4063 ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4064 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) 4065 chkport = 1; 4066#endif /* IPSEC_NAT_T */ 4067 4068 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4069 return 0; 4070 } 4071 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4072 return 0; 4073 } 4074 } 4075 4076 return 1; 4077} 4078 4079/* 4080 * compare two secindex structure exactly. 4081 * IN: 4082 * spidx0: source, it is often in SPD. 4083 * spidx1: object, it is often from PFKEY message. 4084 * OUT: 4085 * 1 : equal 4086 * 0 : not equal 4087 */ 4088static int 4089key_cmpspidx_exactly( 4090 struct secpolicyindex *spidx0, 4091 struct secpolicyindex *spidx1) 4092{ 4093 /* sanity */ 4094 if (spidx0 == NULL && spidx1 == NULL) 4095 return 1; 4096 4097 if (spidx0 == NULL || spidx1 == NULL) 4098 return 0; 4099 4100 if (spidx0->prefs != spidx1->prefs 4101 || spidx0->prefd != spidx1->prefd 4102 || spidx0->ul_proto != spidx1->ul_proto) 4103 return 0; 4104 4105 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4106 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4107} 4108 4109/* 4110 * compare two secindex structure with mask. 4111 * IN: 4112 * spidx0: source, it is often in SPD. 4113 * spidx1: object, it is often from IP header. 4114 * OUT: 4115 * 1 : equal 4116 * 0 : not equal 4117 */ 4118static int 4119key_cmpspidx_withmask( 4120 struct secpolicyindex *spidx0, 4121 struct secpolicyindex *spidx1) 4122{ 4123 /* sanity */ 4124 if (spidx0 == NULL && spidx1 == NULL) 4125 return 1; 4126 4127 if (spidx0 == NULL || spidx1 == NULL) 4128 return 0; 4129 4130 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4131 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4132 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4133 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4134 return 0; 4135 4136 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4137 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4138 && spidx0->ul_proto != spidx1->ul_proto) 4139 return 0; 4140 4141 switch (spidx0->src.sa.sa_family) { 4142 case AF_INET: 4143 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4144 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4145 return 0; 4146 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4147 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4148 return 0; 4149 break; 4150 case AF_INET6: 4151 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4152 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4153 return 0; 4154 /* 4155 * scope_id check. if sin6_scope_id is 0, we regard it 4156 * as a wildcard scope, which matches any scope zone ID. 4157 */ 4158 if (spidx0->src.sin6.sin6_scope_id && 4159 spidx1->src.sin6.sin6_scope_id && 4160 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4161 return 0; 4162 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4163 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4164 return 0; 4165 break; 4166 default: 4167 /* XXX */ 4168 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4169 return 0; 4170 break; 4171 } 4172 4173 switch (spidx0->dst.sa.sa_family) { 4174 case AF_INET: 4175 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4176 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4177 return 0; 4178 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4179 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4180 return 0; 4181 break; 4182 case AF_INET6: 4183 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4184 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4185 return 0; 4186 /* 4187 * scope_id check. if sin6_scope_id is 0, we regard it 4188 * as a wildcard scope, which matches any scope zone ID. 4189 */ 4190 if (spidx0->dst.sin6.sin6_scope_id && 4191 spidx1->dst.sin6.sin6_scope_id && 4192 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4193 return 0; 4194 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4195 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4196 return 0; 4197 break; 4198 default: 4199 /* XXX */ 4200 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4201 return 0; 4202 break; 4203 } 4204 4205 /* XXX Do we check other field ? e.g. flowinfo */ 4206 4207 return 1; 4208} 4209 4210/* returns 0 on match */ 4211static int 4212key_sockaddrcmp( 4213 const struct sockaddr *sa1, 4214 const struct sockaddr *sa2, 4215 int port) 4216{ 4217#ifdef satosin 4218#undef satosin 4219#endif 4220#define satosin(s) ((const struct sockaddr_in *)s) 4221#ifdef satosin6 4222#undef satosin6 4223#endif 4224#define satosin6(s) ((const struct sockaddr_in6 *)s) 4225 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4226 return 1; 4227 4228 switch (sa1->sa_family) { 4229 case AF_INET: 4230 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4231 return 1; 4232 if (satosin(sa1)->sin_addr.s_addr != 4233 satosin(sa2)->sin_addr.s_addr) { 4234 return 1; 4235 } 4236 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4237 return 1; 4238 break; 4239 case AF_INET6: 4240 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4241 return 1; /*EINVAL*/ 4242 if (satosin6(sa1)->sin6_scope_id != 4243 satosin6(sa2)->sin6_scope_id) { 4244 return 1; 4245 } 4246 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4247 &satosin6(sa2)->sin6_addr)) { 4248 return 1; 4249 } 4250 if (port && 4251 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4252 return 1; 4253 } 4254 break; 4255 default: 4256 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4257 return 1; 4258 break; 4259 } 4260 4261 return 0; 4262#undef satosin 4263#undef satosin6 4264} 4265 4266/* 4267 * compare two buffers with mask. 4268 * IN: 4269 * addr1: source 4270 * addr2: object 4271 * bits: Number of bits to compare 4272 * OUT: 4273 * 1 : equal 4274 * 0 : not equal 4275 */ 4276static int 4277key_bbcmp(const void *a1, const void *a2, u_int bits) 4278{ 4279 const unsigned char *p1 = a1; 4280 const unsigned char *p2 = a2; 4281 4282 /* XXX: This could be considerably faster if we compare a word 4283 * at a time, but it is complicated on LSB Endian machines */ 4284 4285 /* Handle null pointers */ 4286 if (p1 == NULL || p2 == NULL) 4287 return (p1 == p2); 4288 4289 while (bits >= 8) { 4290 if (*p1++ != *p2++) 4291 return 0; 4292 bits -= 8; 4293 } 4294 4295 if (bits > 0) { 4296 u_int8_t mask = ~((1<<(8-bits))-1); 4297 if ((*p1 & mask) != (*p2 & mask)) 4298 return 0; 4299 } 4300 return 1; /* Match! */ 4301} 4302 4303static void 4304key_flush_spd(time_t now) 4305{ 4306 static u_int16_t sptree_scangen = 0; 4307 u_int16_t gen = sptree_scangen++; 4308 struct secpolicy *sp; 4309 u_int dir; 4310 4311 /* SPD */ 4312 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4313restart: 4314 SPTREE_LOCK(); 4315 LIST_FOREACH(sp, &V_sptree[dir], chain) { 4316 if (sp->scangen == gen) /* previously handled */ 4317 continue; 4318 sp->scangen = gen; 4319 if (sp->state == IPSEC_SPSTATE_DEAD && 4320 sp->refcnt == 1) { 4321 /* 4322 * Ensure that we only decrease refcnt once, 4323 * when we're the last consumer. 4324 * Directly call SP_DELREF/key_delsp instead 4325 * of KEY_FREESP to avoid unlocking/relocking 4326 * SPTREE_LOCK before key_delsp: may refcnt 4327 * be increased again during that time ? 4328 * NB: also clean entries created by 4329 * key_spdflush 4330 */ 4331 SP_DELREF(sp); 4332 key_delsp(sp); 4333 SPTREE_UNLOCK(); 4334 goto restart; 4335 } 4336 if (sp->lifetime == 0 && sp->validtime == 0) 4337 continue; 4338 if ((sp->lifetime && now - sp->created > sp->lifetime) 4339 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4340 sp->state = IPSEC_SPSTATE_DEAD; 4341 SPTREE_UNLOCK(); 4342 key_spdexpire(sp); 4343 goto restart; 4344 } 4345 } 4346 SPTREE_UNLOCK(); 4347 } 4348} 4349 4350static void 4351key_flush_sad(time_t now) 4352{ 4353 struct secashead *sah, *nextsah; 4354 struct secasvar *sav, *nextsav; 4355 4356 /* SAD */ 4357 SAHTREE_LOCK(); 4358 LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { 4359 /* if sah has been dead, then delete it and process next sah. */ 4360 if (sah->state == SADB_SASTATE_DEAD) { 4361 key_delsah(sah); 4362 continue; 4363 } 4364 4365 /* if LARVAL entry doesn't become MATURE, delete it. */ 4366 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4367 /* Need to also check refcnt for a larval SA ??? */ 4368 if (now - sav->created > V_key_larval_lifetime) 4369 KEY_FREESAV(&sav); 4370 } 4371 4372 /* 4373 * check MATURE entry to start to send expire message 4374 * whether or not. 4375 */ 4376 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4377 /* we don't need to check. */ 4378 if (sav->lft_s == NULL) 4379 continue; 4380 4381 /* sanity check */ 4382 if (sav->lft_c == NULL) { 4383 ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4384 "time, why?\n", __func__)); 4385 continue; 4386 } 4387 4388 /* check SOFT lifetime */ 4389 if (sav->lft_s->addtime != 0 && 4390 now - sav->created > sav->lft_s->addtime) { 4391 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4392 /* 4393 * Actually, only send expire message if 4394 * SA has been used, as it was done before, 4395 * but should we always send such message, 4396 * and let IKE daemon decide if it should be 4397 * renegotiated or not ? 4398 * XXX expire message will actually NOT be 4399 * sent if SA is only used after soft 4400 * lifetime has been reached, see below 4401 * (DYING state) 4402 */ 4403 if (sav->lft_c->usetime != 0) 4404 key_expire(sav); 4405 } 4406 /* check SOFT lifetime by bytes */ 4407 /* 4408 * XXX I don't know the way to delete this SA 4409 * when new SA is installed. Caution when it's 4410 * installed too big lifetime by time. 4411 */ 4412 else if (sav->lft_s->bytes != 0 && 4413 sav->lft_s->bytes < sav->lft_c->bytes) { 4414 4415 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4416 /* 4417 * XXX If we keep to send expire 4418 * message in the status of 4419 * DYING. Do remove below code. 4420 */ 4421 key_expire(sav); 4422 } 4423 } 4424 4425 /* check DYING entry to change status to DEAD. */ 4426 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4427 /* we don't need to check. */ 4428 if (sav->lft_h == NULL) 4429 continue; 4430 4431 /* sanity check */ 4432 if (sav->lft_c == NULL) { 4433 ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4434 "time, why?\n", __func__)); 4435 continue; 4436 } 4437 4438 if (sav->lft_h->addtime != 0 && 4439 now - sav->created > sav->lft_h->addtime) { 4440 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4441 KEY_FREESAV(&sav); 4442 } 4443#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4444 else if (sav->lft_s != NULL 4445 && sav->lft_s->addtime != 0 4446 && now - sav->created > sav->lft_s->addtime) { 4447 /* 4448 * XXX: should be checked to be 4449 * installed the valid SA. 4450 */ 4451 4452 /* 4453 * If there is no SA then sending 4454 * expire message. 4455 */ 4456 key_expire(sav); 4457 } 4458#endif 4459 /* check HARD lifetime by bytes */ 4460 else if (sav->lft_h->bytes != 0 && 4461 sav->lft_h->bytes < sav->lft_c->bytes) { 4462 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4463 KEY_FREESAV(&sav); 4464 } 4465 } 4466 4467 /* delete entry in DEAD */ 4468 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4469 /* sanity check */ 4470 if (sav->state != SADB_SASTATE_DEAD) { 4471 ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4472 "(queue: %d SA: %d): kill it anyway\n", 4473 __func__, 4474 SADB_SASTATE_DEAD, sav->state)); 4475 } 4476 /* 4477 * do not call key_freesav() here. 4478 * sav should already be freed, and sav->refcnt 4479 * shows other references to sav 4480 * (such as from SPD). 4481 */ 4482 } 4483 } 4484 SAHTREE_UNLOCK(); 4485} 4486 4487static void 4488key_flush_acq(time_t now) 4489{ 4490 struct secacq *acq, *nextacq; 4491 4492 /* ACQ tree */ 4493 ACQ_LOCK(); 4494 for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 4495 nextacq = LIST_NEXT(acq, chain); 4496 if (now - acq->created > V_key_blockacq_lifetime 4497 && __LIST_CHAINED(acq)) { 4498 LIST_REMOVE(acq, chain); 4499 free(acq, M_IPSEC_SAQ); 4500 } 4501 } 4502 ACQ_UNLOCK(); 4503} 4504 4505static void 4506key_flush_spacq(time_t now) 4507{ 4508 struct secspacq *acq, *nextacq; 4509 4510 /* SP ACQ tree */ 4511 SPACQ_LOCK(); 4512 for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 4513 nextacq = LIST_NEXT(acq, chain); 4514 if (now - acq->created > V_key_blockacq_lifetime 4515 && __LIST_CHAINED(acq)) { 4516 LIST_REMOVE(acq, chain); 4517 free(acq, M_IPSEC_SAQ); 4518 } 4519 } 4520 SPACQ_UNLOCK(); 4521} 4522 4523/* 4524 * time handler. 4525 * scanning SPD and SAD to check status for each entries, 4526 * and do to remove or to expire. 4527 * XXX: year 2038 problem may remain. 4528 */ 4529void 4530key_timehandler(void) 4531{ 4532 VNET_ITERATOR_DECL(vnet_iter); 4533 time_t now = time_second; 4534 4535 VNET_LIST_RLOCK_NOSLEEP(); 4536 VNET_FOREACH(vnet_iter) { 4537 CURVNET_SET(vnet_iter); 4538 key_flush_spd(now); 4539 key_flush_sad(now); 4540 key_flush_acq(now); 4541 key_flush_spacq(now); 4542 CURVNET_RESTORE(); 4543 } 4544 VNET_LIST_RUNLOCK_NOSLEEP(); 4545 4546#ifndef IPSEC_DEBUG2 4547 /* do exchange to tick time !! */ 4548 (void)timeout((void *)key_timehandler, (void *)0, hz); 4549#endif /* IPSEC_DEBUG2 */ 4550} 4551 4552u_long 4553key_random() 4554{ 4555 u_long value; 4556 4557 key_randomfill(&value, sizeof(value)); 4558 return value; 4559} 4560 4561void 4562key_randomfill(p, l) 4563 void *p; 4564 size_t l; 4565{ 4566 size_t n; 4567 u_long v; 4568 static int warn = 1; 4569 4570 n = 0; 4571 n = (size_t)read_random(p, (u_int)l); 4572 /* last resort */ 4573 while (n < l) { 4574 v = random(); 4575 bcopy(&v, (u_int8_t *)p + n, 4576 l - n < sizeof(v) ? l - n : sizeof(v)); 4577 n += sizeof(v); 4578 4579 if (warn) { 4580 printf("WARNING: pseudo-random number generator " 4581 "used for IPsec processing\n"); 4582 warn = 0; 4583 } 4584 } 4585} 4586 4587/* 4588 * map SADB_SATYPE_* to IPPROTO_*. 4589 * if satype == SADB_SATYPE then satype is mapped to ~0. 4590 * OUT: 4591 * 0: invalid satype. 4592 */ 4593static u_int16_t 4594key_satype2proto(u_int8_t satype) 4595{ 4596 switch (satype) { 4597 case SADB_SATYPE_UNSPEC: 4598 return IPSEC_PROTO_ANY; 4599 case SADB_SATYPE_AH: 4600 return IPPROTO_AH; 4601 case SADB_SATYPE_ESP: 4602 return IPPROTO_ESP; 4603 case SADB_X_SATYPE_IPCOMP: 4604 return IPPROTO_IPCOMP; 4605 case SADB_X_SATYPE_TCPSIGNATURE: 4606 return IPPROTO_TCP; 4607 default: 4608 return 0; 4609 } 4610 /* NOTREACHED */ 4611} 4612 4613/* 4614 * map IPPROTO_* to SADB_SATYPE_* 4615 * OUT: 4616 * 0: invalid protocol type. 4617 */ 4618static u_int8_t 4619key_proto2satype(u_int16_t proto) 4620{ 4621 switch (proto) { 4622 case IPPROTO_AH: 4623 return SADB_SATYPE_AH; 4624 case IPPROTO_ESP: 4625 return SADB_SATYPE_ESP; 4626 case IPPROTO_IPCOMP: 4627 return SADB_X_SATYPE_IPCOMP; 4628 case IPPROTO_TCP: 4629 return SADB_X_SATYPE_TCPSIGNATURE; 4630 default: 4631 return 0; 4632 } 4633 /* NOTREACHED */ 4634} 4635 4636/* %%% PF_KEY */ 4637/* 4638 * SADB_GETSPI processing is to receive 4639 * <base, (SA2), src address, dst address, (SPI range)> 4640 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4641 * tree with the status of LARVAL, and send 4642 * <base, SA(*), address(SD)> 4643 * to the IKMPd. 4644 * 4645 * IN: mhp: pointer to the pointer to each header. 4646 * OUT: NULL if fail. 4647 * other if success, return pointer to the message to send. 4648 */ 4649static int 4650key_getspi(so, m, mhp) 4651 struct socket *so; 4652 struct mbuf *m; 4653 const struct sadb_msghdr *mhp; 4654{ 4655 struct sadb_address *src0, *dst0; 4656 struct secasindex saidx; 4657 struct secashead *newsah; 4658 struct secasvar *newsav; 4659 u_int8_t proto; 4660 u_int32_t spi; 4661 u_int8_t mode; 4662 u_int32_t reqid; 4663 int error; 4664 4665 IPSEC_ASSERT(so != NULL, ("null socket")); 4666 IPSEC_ASSERT(m != NULL, ("null mbuf")); 4667 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4668 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4669 4670 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4671 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4672 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4673 __func__)); 4674 return key_senderror(so, m, EINVAL); 4675 } 4676 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4677 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4678 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4679 __func__)); 4680 return key_senderror(so, m, EINVAL); 4681 } 4682 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4683 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4684 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4685 } else { 4686 mode = IPSEC_MODE_ANY; 4687 reqid = 0; 4688 } 4689 4690 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4691 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4692 4693 /* map satype to proto */ 4694 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4695 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4696 __func__)); 4697 return key_senderror(so, m, EINVAL); 4698 } 4699 4700 /* 4701 * Make sure the port numbers are zero. 4702 * In case of NAT-T we will update them later if needed. 4703 */ 4704 switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4705 case AF_INET: 4706 if (((struct sockaddr *)(src0 + 1))->sa_len != 4707 sizeof(struct sockaddr_in)) 4708 return key_senderror(so, m, EINVAL); 4709 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4710 break; 4711 case AF_INET6: 4712 if (((struct sockaddr *)(src0 + 1))->sa_len != 4713 sizeof(struct sockaddr_in6)) 4714 return key_senderror(so, m, EINVAL); 4715 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4716 break; 4717 default: 4718 ; /*???*/ 4719 } 4720 switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4721 case AF_INET: 4722 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4723 sizeof(struct sockaddr_in)) 4724 return key_senderror(so, m, EINVAL); 4725 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4726 break; 4727 case AF_INET6: 4728 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4729 sizeof(struct sockaddr_in6)) 4730 return key_senderror(so, m, EINVAL); 4731 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4732 break; 4733 default: 4734 ; /*???*/ 4735 } 4736 4737 /* XXX boundary check against sa_len */ 4738 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4739 4740#ifdef IPSEC_NAT_T 4741 /* 4742 * Handle NAT-T info if present. 4743 * We made sure the port numbers are zero above, so we do 4744 * not have to worry in case we do not update them. 4745 */ 4746 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 4747 ipseclog((LOG_DEBUG, "%s: NAT-T OAi present\n", __func__)); 4748 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 4749 ipseclog((LOG_DEBUG, "%s: NAT-T OAr present\n", __func__)); 4750 4751 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 4752 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 4753 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 4754 struct sadb_x_nat_t_type *type; 4755 struct sadb_x_nat_t_port *sport, *dport; 4756 4757 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 4758 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 4759 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 4760 ipseclog((LOG_DEBUG, "%s: invalid nat-t message " 4761 "passed.\n", __func__)); 4762 return key_senderror(so, m, EINVAL); 4763 } 4764 4765 sport = (struct sadb_x_nat_t_port *) 4766 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 4767 dport = (struct sadb_x_nat_t_port *) 4768 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 4769 4770 if (sport) 4771 KEY_PORTTOSADDR(&saidx.src, sport->sadb_x_nat_t_port_port); 4772 if (dport) 4773 KEY_PORTTOSADDR(&saidx.dst, dport->sadb_x_nat_t_port_port); 4774 } 4775#endif 4776 4777 /* SPI allocation */ 4778 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4779 &saidx); 4780 if (spi == 0) 4781 return key_senderror(so, m, EINVAL); 4782 4783 /* get a SA index */ 4784 if ((newsah = key_getsah(&saidx)) == NULL) { 4785 /* create a new SA index */ 4786 if ((newsah = key_newsah(&saidx)) == NULL) { 4787 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4788 return key_senderror(so, m, ENOBUFS); 4789 } 4790 } 4791 4792 /* get a new SA */ 4793 /* XXX rewrite */ 4794 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4795 if (newsav == NULL) { 4796 /* XXX don't free new SA index allocated in above. */ 4797 return key_senderror(so, m, error); 4798 } 4799 4800 /* set spi */ 4801 newsav->spi = htonl(spi); 4802 4803 /* delete the entry in acqtree */ 4804 if (mhp->msg->sadb_msg_seq != 0) { 4805 struct secacq *acq; 4806 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4807 /* reset counter in order to deletion by timehandler. */ 4808 acq->created = time_second; 4809 acq->count = 0; 4810 } 4811 } 4812 4813 { 4814 struct mbuf *n, *nn; 4815 struct sadb_sa *m_sa; 4816 struct sadb_msg *newmsg; 4817 int off, len; 4818 4819 /* create new sadb_msg to reply. */ 4820 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4821 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4822 4823 MGETHDR(n, M_DONTWAIT, MT_DATA); 4824 if (len > MHLEN) { 4825 MCLGET(n, M_DONTWAIT); 4826 if ((n->m_flags & M_EXT) == 0) { 4827 m_freem(n); 4828 n = NULL; 4829 } 4830 } 4831 if (!n) 4832 return key_senderror(so, m, ENOBUFS); 4833 4834 n->m_len = len; 4835 n->m_next = NULL; 4836 off = 0; 4837 4838 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4839 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4840 4841 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4842 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4843 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4844 m_sa->sadb_sa_spi = htonl(spi); 4845 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4846 4847 IPSEC_ASSERT(off == len, 4848 ("length inconsistency (off %u len %u)", off, len)); 4849 4850 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4851 SADB_EXT_ADDRESS_DST); 4852 if (!n->m_next) { 4853 m_freem(n); 4854 return key_senderror(so, m, ENOBUFS); 4855 } 4856 4857 if (n->m_len < sizeof(struct sadb_msg)) { 4858 n = m_pullup(n, sizeof(struct sadb_msg)); 4859 if (n == NULL) 4860 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4861 } 4862 4863 n->m_pkthdr.len = 0; 4864 for (nn = n; nn; nn = nn->m_next) 4865 n->m_pkthdr.len += nn->m_len; 4866 4867 newmsg = mtod(n, struct sadb_msg *); 4868 newmsg->sadb_msg_seq = newsav->seq; 4869 newmsg->sadb_msg_errno = 0; 4870 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4871 4872 m_freem(m); 4873 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4874 } 4875} 4876 4877/* 4878 * allocating new SPI 4879 * called by key_getspi(). 4880 * OUT: 4881 * 0: failure. 4882 * others: success. 4883 */ 4884static u_int32_t 4885key_do_getnewspi(spirange, saidx) 4886 struct sadb_spirange *spirange; 4887 struct secasindex *saidx; 4888{ 4889 u_int32_t newspi; 4890 u_int32_t min, max; 4891 int count = V_key_spi_trycnt; 4892 4893 /* set spi range to allocate */ 4894 if (spirange != NULL) { 4895 min = spirange->sadb_spirange_min; 4896 max = spirange->sadb_spirange_max; 4897 } else { 4898 min = V_key_spi_minval; 4899 max = V_key_spi_maxval; 4900 } 4901 /* IPCOMP needs 2-byte SPI */ 4902 if (saidx->proto == IPPROTO_IPCOMP) { 4903 u_int32_t t; 4904 if (min >= 0x10000) 4905 min = 0xffff; 4906 if (max >= 0x10000) 4907 max = 0xffff; 4908 if (min > max) { 4909 t = min; min = max; max = t; 4910 } 4911 } 4912 4913 if (min == max) { 4914 if (key_checkspidup(saidx, min) != NULL) { 4915 ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4916 __func__, min)); 4917 return 0; 4918 } 4919 4920 count--; /* taking one cost. */ 4921 newspi = min; 4922 4923 } else { 4924 4925 /* init SPI */ 4926 newspi = 0; 4927 4928 /* when requesting to allocate spi ranged */ 4929 while (count--) { 4930 /* generate pseudo-random SPI value ranged. */ 4931 newspi = min + (key_random() % (max - min + 1)); 4932 4933 if (key_checkspidup(saidx, newspi) == NULL) 4934 break; 4935 } 4936 4937 if (count == 0 || newspi == 0) { 4938 ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4939 __func__)); 4940 return 0; 4941 } 4942 } 4943 4944 /* statistics */ 4945 keystat.getspi_count = 4946 (keystat.getspi_count + V_key_spi_trycnt - count) / 2; 4947 4948 return newspi; 4949} 4950 4951/* 4952 * SADB_UPDATE processing 4953 * receive 4954 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4955 * key(AE), (identity(SD),) (sensitivity)> 4956 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4957 * and send 4958 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4959 * (identity(SD),) (sensitivity)> 4960 * to the ikmpd. 4961 * 4962 * m will always be freed. 4963 */ 4964static int 4965key_update(so, m, mhp) 4966 struct socket *so; 4967 struct mbuf *m; 4968 const struct sadb_msghdr *mhp; 4969{ 4970 struct sadb_sa *sa0; 4971 struct sadb_address *src0, *dst0; 4972#ifdef IPSEC_NAT_T 4973 struct sadb_x_nat_t_type *type; 4974 struct sadb_x_nat_t_port *sport, *dport; 4975 struct sadb_address *iaddr, *raddr; 4976 struct sadb_x_nat_t_frag *frag; 4977#endif 4978 struct secasindex saidx; 4979 struct secashead *sah; 4980 struct secasvar *sav; 4981 u_int16_t proto; 4982 u_int8_t mode; 4983 u_int32_t reqid; 4984 int error; 4985 4986 IPSEC_ASSERT(so != NULL, ("null socket")); 4987 IPSEC_ASSERT(m != NULL, ("null mbuf")); 4988 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4989 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4990 4991 /* map satype to proto */ 4992 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4993 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4994 __func__)); 4995 return key_senderror(so, m, EINVAL); 4996 } 4997 4998 if (mhp->ext[SADB_EXT_SA] == NULL || 4999 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5000 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5001 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5002 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5003 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5004 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5005 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5006 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5007 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5008 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5009 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5010 __func__)); 5011 return key_senderror(so, m, EINVAL); 5012 } 5013 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5014 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5015 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5016 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5017 __func__)); 5018 return key_senderror(so, m, EINVAL); 5019 } 5020 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5021 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5022 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5023 } else { 5024 mode = IPSEC_MODE_ANY; 5025 reqid = 0; 5026 } 5027 /* XXX boundary checking for other extensions */ 5028 5029 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5030 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5031 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5032 5033 /* XXX boundary check against sa_len */ 5034 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5035 5036 /* 5037 * Make sure the port numbers are zero. 5038 * In case of NAT-T we will update them later if needed. 5039 */ 5040 KEY_PORTTOSADDR(&saidx.src, 0); 5041 KEY_PORTTOSADDR(&saidx.dst, 0); 5042 5043#ifdef IPSEC_NAT_T 5044 /* 5045 * Handle NAT-T info if present. 5046 */ 5047 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5048 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5049 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5050 5051 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5052 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5053 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5054 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5055 __func__)); 5056 return key_senderror(so, m, EINVAL); 5057 } 5058 5059 type = (struct sadb_x_nat_t_type *) 5060 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5061 sport = (struct sadb_x_nat_t_port *) 5062 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5063 dport = (struct sadb_x_nat_t_port *) 5064 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5065 } else { 5066 type = 0; 5067 sport = dport = 0; 5068 } 5069 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5070 mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5071 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5072 mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5073 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5074 __func__)); 5075 return key_senderror(so, m, EINVAL); 5076 } 5077 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5078 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5079 ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5080 } else { 5081 iaddr = raddr = NULL; 5082 } 5083 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5084 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5085 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5086 __func__)); 5087 return key_senderror(so, m, EINVAL); 5088 } 5089 frag = (struct sadb_x_nat_t_frag *) 5090 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5091 } else { 5092 frag = 0; 5093 } 5094#endif 5095 5096 /* get a SA header */ 5097 if ((sah = key_getsah(&saidx)) == NULL) { 5098 ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 5099 return key_senderror(so, m, ENOENT); 5100 } 5101 5102 /* set spidx if there */ 5103 /* XXX rewrite */ 5104 error = key_setident(sah, m, mhp); 5105 if (error) 5106 return key_senderror(so, m, error); 5107 5108 /* find a SA with sequence number. */ 5109#ifdef IPSEC_DOSEQCHECK 5110 if (mhp->msg->sadb_msg_seq != 0 5111 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5112 ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 5113 "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 5114 return key_senderror(so, m, ENOENT); 5115 } 5116#else 5117 SAHTREE_LOCK(); 5118 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5119 SAHTREE_UNLOCK(); 5120 if (sav == NULL) { 5121 ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 5122 __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5123 return key_senderror(so, m, EINVAL); 5124 } 5125#endif 5126 5127 /* validity check */ 5128 if (sav->sah->saidx.proto != proto) { 5129 ipseclog((LOG_DEBUG, "%s: protocol mismatched " 5130 "(DB=%u param=%u)\n", __func__, 5131 sav->sah->saidx.proto, proto)); 5132 return key_senderror(so, m, EINVAL); 5133 } 5134#ifdef IPSEC_DOSEQCHECK 5135 if (sav->spi != sa0->sadb_sa_spi) { 5136 ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 5137 __func__, 5138 (u_int32_t)ntohl(sav->spi), 5139 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5140 return key_senderror(so, m, EINVAL); 5141 } 5142#endif 5143 if (sav->pid != mhp->msg->sadb_msg_pid) { 5144 ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 5145 __func__, sav->pid, mhp->msg->sadb_msg_pid)); 5146 return key_senderror(so, m, EINVAL); 5147 } 5148 5149 /* copy sav values */ 5150 error = key_setsaval(sav, m, mhp); 5151 if (error) { 5152 KEY_FREESAV(&sav); 5153 return key_senderror(so, m, error); 5154 } 5155 5156#ifdef IPSEC_NAT_T 5157 /* 5158 * Handle more NAT-T info if present, 5159 * now that we have a sav to fill. 5160 */ 5161 if (type) 5162 sav->natt_type = type->sadb_x_nat_t_type_type; 5163 5164 if (sport) 5165 KEY_PORTTOSADDR(&sav->sah->saidx.src, 5166 sport->sadb_x_nat_t_port_port); 5167 if (dport) 5168 KEY_PORTTOSADDR(&sav->sah->saidx.dst, 5169 dport->sadb_x_nat_t_port_port); 5170 5171#if 0 5172 /* 5173 * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5174 * We should actually check for a minimum MTU here, if we 5175 * want to support it in ip_output. 5176 */ 5177 if (frag) 5178 sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5179#endif 5180#endif 5181 5182 /* check SA values to be mature. */ 5183 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5184 KEY_FREESAV(&sav); 5185 return key_senderror(so, m, 0); 5186 } 5187 5188 { 5189 struct mbuf *n; 5190 5191 /* set msg buf from mhp */ 5192 n = key_getmsgbuf_x1(m, mhp); 5193 if (n == NULL) { 5194 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5195 return key_senderror(so, m, ENOBUFS); 5196 } 5197 5198 m_freem(m); 5199 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5200 } 5201} 5202 5203/* 5204 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5205 * only called by key_update(). 5206 * OUT: 5207 * NULL : not found 5208 * others : found, pointer to a SA. 5209 */ 5210#ifdef IPSEC_DOSEQCHECK 5211static struct secasvar * 5212key_getsavbyseq(sah, seq) 5213 struct secashead *sah; 5214 u_int32_t seq; 5215{ 5216 struct secasvar *sav; 5217 u_int state; 5218 5219 state = SADB_SASTATE_LARVAL; 5220 5221 /* search SAD with sequence number ? */ 5222 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5223 5224 KEY_CHKSASTATE(state, sav->state, __func__); 5225 5226 if (sav->seq == seq) { 5227 sa_addref(sav); 5228 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5229 printf("DP %s cause refcnt++:%d SA:%p\n", 5230 __func__, sav->refcnt, sav)); 5231 return sav; 5232 } 5233 } 5234 5235 return NULL; 5236} 5237#endif 5238 5239/* 5240 * SADB_ADD processing 5241 * add an entry to SA database, when received 5242 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5243 * key(AE), (identity(SD),) (sensitivity)> 5244 * from the ikmpd, 5245 * and send 5246 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5247 * (identity(SD),) (sensitivity)> 5248 * to the ikmpd. 5249 * 5250 * IGNORE identity and sensitivity messages. 5251 * 5252 * m will always be freed. 5253 */ 5254static int 5255key_add(so, m, mhp) 5256 struct socket *so; 5257 struct mbuf *m; 5258 const struct sadb_msghdr *mhp; 5259{ 5260 struct sadb_sa *sa0; 5261 struct sadb_address *src0, *dst0; 5262#ifdef IPSEC_NAT_T 5263 struct sadb_x_nat_t_type *type; 5264 struct sadb_address *iaddr, *raddr; 5265 struct sadb_x_nat_t_frag *frag; 5266#endif 5267 struct secasindex saidx; 5268 struct secashead *newsah; 5269 struct secasvar *newsav; 5270 u_int16_t proto; 5271 u_int8_t mode; 5272 u_int32_t reqid; 5273 int error; 5274 5275 IPSEC_ASSERT(so != NULL, ("null socket")); 5276 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5277 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5278 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5279 5280 /* map satype to proto */ 5281 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5282 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5283 __func__)); 5284 return key_senderror(so, m, EINVAL); 5285 } 5286 5287 if (mhp->ext[SADB_EXT_SA] == NULL || 5288 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5289 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5290 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5291 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5292 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5293 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5294 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5295 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5296 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5297 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5298 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5299 __func__)); 5300 return key_senderror(so, m, EINVAL); 5301 } 5302 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5303 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5304 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5305 /* XXX need more */ 5306 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5307 __func__)); 5308 return key_senderror(so, m, EINVAL); 5309 } 5310 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5311 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5312 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5313 } else { 5314 mode = IPSEC_MODE_ANY; 5315 reqid = 0; 5316 } 5317 5318 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5319 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5320 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5321 5322 /* XXX boundary check against sa_len */ 5323 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5324 5325 /* 5326 * Make sure the port numbers are zero. 5327 * In case of NAT-T we will update them later if needed. 5328 */ 5329 KEY_PORTTOSADDR(&saidx.src, 0); 5330 KEY_PORTTOSADDR(&saidx.dst, 0); 5331 5332#ifdef IPSEC_NAT_T 5333 /* 5334 * Handle NAT-T info if present. 5335 */ 5336 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5337 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5338 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5339 struct sadb_x_nat_t_port *sport, *dport; 5340 5341 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5342 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5343 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5344 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5345 __func__)); 5346 return key_senderror(so, m, EINVAL); 5347 } 5348 5349 type = (struct sadb_x_nat_t_type *) 5350 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5351 sport = (struct sadb_x_nat_t_port *) 5352 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5353 dport = (struct sadb_x_nat_t_port *) 5354 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5355 5356 if (sport) 5357 KEY_PORTTOSADDR(&saidx.src, 5358 sport->sadb_x_nat_t_port_port); 5359 if (dport) 5360 KEY_PORTTOSADDR(&saidx.dst, 5361 dport->sadb_x_nat_t_port_port); 5362 } else { 5363 type = 0; 5364 } 5365 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5366 mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5367 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5368 mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5369 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5370 __func__)); 5371 return key_senderror(so, m, EINVAL); 5372 } 5373 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5374 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5375 ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5376 } else { 5377 iaddr = raddr = NULL; 5378 } 5379 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5380 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5381 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5382 __func__)); 5383 return key_senderror(so, m, EINVAL); 5384 } 5385 frag = (struct sadb_x_nat_t_frag *) 5386 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5387 } else { 5388 frag = 0; 5389 } 5390#endif 5391 5392 /* get a SA header */ 5393 if ((newsah = key_getsah(&saidx)) == NULL) { 5394 /* create a new SA header */ 5395 if ((newsah = key_newsah(&saidx)) == NULL) { 5396 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 5397 return key_senderror(so, m, ENOBUFS); 5398 } 5399 } 5400 5401 /* set spidx if there */ 5402 /* XXX rewrite */ 5403 error = key_setident(newsah, m, mhp); 5404 if (error) { 5405 return key_senderror(so, m, error); 5406 } 5407 5408 /* create new SA entry. */ 5409 /* We can create new SA only if SPI is differenct. */ 5410 SAHTREE_LOCK(); 5411 newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5412 SAHTREE_UNLOCK(); 5413 if (newsav != NULL) { 5414 ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 5415 return key_senderror(so, m, EEXIST); 5416 } 5417 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5418 if (newsav == NULL) { 5419 return key_senderror(so, m, error); 5420 } 5421 5422#ifdef IPSEC_NAT_T 5423 /* 5424 * Handle more NAT-T info if present, 5425 * now that we have a sav to fill. 5426 */ 5427 if (type) 5428 newsav->natt_type = type->sadb_x_nat_t_type_type; 5429 5430#if 0 5431 /* 5432 * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5433 * We should actually check for a minimum MTU here, if we 5434 * want to support it in ip_output. 5435 */ 5436 if (frag) 5437 newsav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5438#endif 5439#endif 5440 5441 /* check SA values to be mature. */ 5442 if ((error = key_mature(newsav)) != 0) { 5443 KEY_FREESAV(&newsav); 5444 return key_senderror(so, m, error); 5445 } 5446 5447 /* 5448 * don't call key_freesav() here, as we would like to keep the SA 5449 * in the database on success. 5450 */ 5451 5452 { 5453 struct mbuf *n; 5454 5455 /* set msg buf from mhp */ 5456 n = key_getmsgbuf_x1(m, mhp); 5457 if (n == NULL) { 5458 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5459 return key_senderror(so, m, ENOBUFS); 5460 } 5461 5462 m_freem(m); 5463 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5464 } 5465} 5466 5467/* m is retained */ 5468static int 5469key_setident(sah, m, mhp) 5470 struct secashead *sah; 5471 struct mbuf *m; 5472 const struct sadb_msghdr *mhp; 5473{ 5474 const struct sadb_ident *idsrc, *iddst; 5475 int idsrclen, iddstlen; 5476 5477 IPSEC_ASSERT(sah != NULL, ("null secashead")); 5478 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5479 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5480 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5481 5482 /* don't make buffer if not there */ 5483 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5484 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5485 sah->idents = NULL; 5486 sah->identd = NULL; 5487 return 0; 5488 } 5489 5490 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5491 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5492 ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 5493 return EINVAL; 5494 } 5495 5496 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5497 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5498 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5499 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5500 5501 /* validity check */ 5502 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5503 ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 5504 return EINVAL; 5505 } 5506 5507 switch (idsrc->sadb_ident_type) { 5508 case SADB_IDENTTYPE_PREFIX: 5509 case SADB_IDENTTYPE_FQDN: 5510 case SADB_IDENTTYPE_USERFQDN: 5511 default: 5512 /* XXX do nothing */ 5513 sah->idents = NULL; 5514 sah->identd = NULL; 5515 return 0; 5516 } 5517 5518 /* make structure */ 5519 sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5520 if (sah->idents == NULL) { 5521 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5522 return ENOBUFS; 5523 } 5524 sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5525 if (sah->identd == NULL) { 5526 free(sah->idents, M_IPSEC_MISC); 5527 sah->idents = NULL; 5528 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5529 return ENOBUFS; 5530 } 5531 sah->idents->type = idsrc->sadb_ident_type; 5532 sah->idents->id = idsrc->sadb_ident_id; 5533 5534 sah->identd->type = iddst->sadb_ident_type; 5535 sah->identd->id = iddst->sadb_ident_id; 5536 5537 return 0; 5538} 5539 5540/* 5541 * m will not be freed on return. 5542 * it is caller's responsibility to free the result. 5543 */ 5544static struct mbuf * 5545key_getmsgbuf_x1(m, mhp) 5546 struct mbuf *m; 5547 const struct sadb_msghdr *mhp; 5548{ 5549 struct mbuf *n; 5550 5551 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5552 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5553 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5554 5555 /* create new sadb_msg to reply. */ 5556 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5557 SADB_EXT_SA, SADB_X_EXT_SA2, 5558 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5559 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5560 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5561 if (!n) 5562 return NULL; 5563 5564 if (n->m_len < sizeof(struct sadb_msg)) { 5565 n = m_pullup(n, sizeof(struct sadb_msg)); 5566 if (n == NULL) 5567 return NULL; 5568 } 5569 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5570 mtod(n, struct sadb_msg *)->sadb_msg_len = 5571 PFKEY_UNIT64(n->m_pkthdr.len); 5572 5573 return n; 5574} 5575 5576static int key_delete_all __P((struct socket *, struct mbuf *, 5577 const struct sadb_msghdr *, u_int16_t)); 5578 5579/* 5580 * SADB_DELETE processing 5581 * receive 5582 * <base, SA(*), address(SD)> 5583 * from the ikmpd, and set SADB_SASTATE_DEAD, 5584 * and send, 5585 * <base, SA(*), address(SD)> 5586 * to the ikmpd. 5587 * 5588 * m will always be freed. 5589 */ 5590static int 5591key_delete(so, m, mhp) 5592 struct socket *so; 5593 struct mbuf *m; 5594 const struct sadb_msghdr *mhp; 5595{ 5596 struct sadb_sa *sa0; 5597 struct sadb_address *src0, *dst0; 5598 struct secasindex saidx; 5599 struct secashead *sah; 5600 struct secasvar *sav = NULL; 5601 u_int16_t proto; 5602 5603 IPSEC_ASSERT(so != NULL, ("null socket")); 5604 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5605 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5606 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5607 5608 /* map satype to proto */ 5609 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5610 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5611 __func__)); 5612 return key_senderror(so, m, EINVAL); 5613 } 5614 5615 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5616 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5617 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5618 __func__)); 5619 return key_senderror(so, m, EINVAL); 5620 } 5621 5622 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5623 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5624 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5625 __func__)); 5626 return key_senderror(so, m, EINVAL); 5627 } 5628 5629 if (mhp->ext[SADB_EXT_SA] == NULL) { 5630 /* 5631 * Caller wants us to delete all non-LARVAL SAs 5632 * that match the src/dst. This is used during 5633 * IKE INITIAL-CONTACT. 5634 */ 5635 ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5636 return key_delete_all(so, m, mhp, proto); 5637 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5638 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5639 __func__)); 5640 return key_senderror(so, m, EINVAL); 5641 } 5642 5643 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5644 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5645 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5646 5647 /* XXX boundary check against sa_len */ 5648 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5649 5650 /* 5651 * Make sure the port numbers are zero. 5652 * In case of NAT-T we will update them later if needed. 5653 */ 5654 KEY_PORTTOSADDR(&saidx.src, 0); 5655 KEY_PORTTOSADDR(&saidx.dst, 0); 5656 5657#ifdef IPSEC_NAT_T 5658 /* 5659 * Handle NAT-T info if present. 5660 */ 5661 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5662 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5663 struct sadb_x_nat_t_port *sport, *dport; 5664 5665 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5666 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5667 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5668 __func__)); 5669 return key_senderror(so, m, EINVAL); 5670 } 5671 5672 sport = (struct sadb_x_nat_t_port *) 5673 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5674 dport = (struct sadb_x_nat_t_port *) 5675 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5676 5677 if (sport) 5678 KEY_PORTTOSADDR(&saidx.src, 5679 sport->sadb_x_nat_t_port_port); 5680 if (dport) 5681 KEY_PORTTOSADDR(&saidx.dst, 5682 dport->sadb_x_nat_t_port_port); 5683 } 5684#endif 5685 5686 /* get a SA header */ 5687 SAHTREE_LOCK(); 5688 LIST_FOREACH(sah, &V_sahtree, chain) { 5689 if (sah->state == SADB_SASTATE_DEAD) 5690 continue; 5691 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5692 continue; 5693 5694 /* get a SA with SPI. */ 5695 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5696 if (sav) 5697 break; 5698 } 5699 if (sah == NULL) { 5700 SAHTREE_UNLOCK(); 5701 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5702 return key_senderror(so, m, ENOENT); 5703 } 5704 5705 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5706 KEY_FREESAV(&sav); 5707 SAHTREE_UNLOCK(); 5708 5709 { 5710 struct mbuf *n; 5711 struct sadb_msg *newmsg; 5712 5713 /* create new sadb_msg to reply. */ 5714 /* XXX-BZ NAT-T extensions? */ 5715 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5716 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5717 if (!n) 5718 return key_senderror(so, m, ENOBUFS); 5719 5720 if (n->m_len < sizeof(struct sadb_msg)) { 5721 n = m_pullup(n, sizeof(struct sadb_msg)); 5722 if (n == NULL) 5723 return key_senderror(so, m, ENOBUFS); 5724 } 5725 newmsg = mtod(n, struct sadb_msg *); 5726 newmsg->sadb_msg_errno = 0; 5727 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5728 5729 m_freem(m); 5730 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5731 } 5732} 5733 5734/* 5735 * delete all SAs for src/dst. Called from key_delete(). 5736 */ 5737static int 5738key_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, 5739 u_int16_t proto) 5740{ 5741 struct sadb_address *src0, *dst0; 5742 struct secasindex saidx; 5743 struct secashead *sah; 5744 struct secasvar *sav, *nextsav; 5745 u_int stateidx, state; 5746 5747 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5748 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5749 5750 /* XXX boundary check against sa_len */ 5751 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5752 5753 /* 5754 * Make sure the port numbers are zero. 5755 * In case of NAT-T we will update them later if needed. 5756 */ 5757 KEY_PORTTOSADDR(&saidx.src, 0); 5758 KEY_PORTTOSADDR(&saidx.dst, 0); 5759 5760#ifdef IPSEC_NAT_T 5761 /* 5762 * Handle NAT-T info if present. 5763 */ 5764 5765 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5766 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5767 struct sadb_x_nat_t_port *sport, *dport; 5768 5769 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5770 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5771 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5772 __func__)); 5773 return key_senderror(so, m, EINVAL); 5774 } 5775 5776 sport = (struct sadb_x_nat_t_port *) 5777 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5778 dport = (struct sadb_x_nat_t_port *) 5779 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5780 5781 if (sport) 5782 KEY_PORTTOSADDR(&saidx.src, 5783 sport->sadb_x_nat_t_port_port); 5784 if (dport) 5785 KEY_PORTTOSADDR(&saidx.dst, 5786 dport->sadb_x_nat_t_port_port); 5787 } 5788#endif 5789 5790 SAHTREE_LOCK(); 5791 LIST_FOREACH(sah, &V_sahtree, chain) { 5792 if (sah->state == SADB_SASTATE_DEAD) 5793 continue; 5794 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5795 continue; 5796 5797 /* Delete all non-LARVAL SAs. */ 5798 for (stateidx = 0; 5799 stateidx < _ARRAYLEN(saorder_state_alive); 5800 stateidx++) { 5801 state = saorder_state_alive[stateidx]; 5802 if (state == SADB_SASTATE_LARVAL) 5803 continue; 5804 for (sav = LIST_FIRST(&sah->savtree[state]); 5805 sav != NULL; sav = nextsav) { 5806 nextsav = LIST_NEXT(sav, chain); 5807 /* sanity check */ 5808 if (sav->state != state) { 5809 ipseclog((LOG_DEBUG, "%s: invalid " 5810 "sav->state (queue %d SA %d)\n", 5811 __func__, state, sav->state)); 5812 continue; 5813 } 5814 5815 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5816 KEY_FREESAV(&sav); 5817 } 5818 } 5819 } 5820 SAHTREE_UNLOCK(); 5821 { 5822 struct mbuf *n; 5823 struct sadb_msg *newmsg; 5824 5825 /* create new sadb_msg to reply. */ 5826 /* XXX-BZ NAT-T extensions? */ 5827 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5828 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5829 if (!n) 5830 return key_senderror(so, m, ENOBUFS); 5831 5832 if (n->m_len < sizeof(struct sadb_msg)) { 5833 n = m_pullup(n, sizeof(struct sadb_msg)); 5834 if (n == NULL) 5835 return key_senderror(so, m, ENOBUFS); 5836 } 5837 newmsg = mtod(n, struct sadb_msg *); 5838 newmsg->sadb_msg_errno = 0; 5839 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5840 5841 m_freem(m); 5842 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5843 } 5844} 5845 5846/* 5847 * SADB_GET processing 5848 * receive 5849 * <base, SA(*), address(SD)> 5850 * from the ikmpd, and get a SP and a SA to respond, 5851 * and send, 5852 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5853 * (identity(SD),) (sensitivity)> 5854 * to the ikmpd. 5855 * 5856 * m will always be freed. 5857 */ 5858static int 5859key_get(so, m, mhp) 5860 struct socket *so; 5861 struct mbuf *m; 5862 const struct sadb_msghdr *mhp; 5863{ 5864 struct sadb_sa *sa0; 5865 struct sadb_address *src0, *dst0; 5866 struct secasindex saidx; 5867 struct secashead *sah; 5868 struct secasvar *sav = NULL; 5869 u_int16_t proto; 5870 5871 IPSEC_ASSERT(so != NULL, ("null socket")); 5872 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5873 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5874 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5875 5876 /* map satype to proto */ 5877 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5878 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5879 __func__)); 5880 return key_senderror(so, m, EINVAL); 5881 } 5882 5883 if (mhp->ext[SADB_EXT_SA] == NULL || 5884 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5885 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5886 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5887 __func__)); 5888 return key_senderror(so, m, EINVAL); 5889 } 5890 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5891 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5892 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5893 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5894 __func__)); 5895 return key_senderror(so, m, EINVAL); 5896 } 5897 5898 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5899 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5900 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5901 5902 /* XXX boundary check against sa_len */ 5903 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5904 5905 /* 5906 * Make sure the port numbers are zero. 5907 * In case of NAT-T we will update them later if needed. 5908 */ 5909 KEY_PORTTOSADDR(&saidx.src, 0); 5910 KEY_PORTTOSADDR(&saidx.dst, 0); 5911 5912#ifdef IPSEC_NAT_T 5913 /* 5914 * Handle NAT-T info if present. 5915 */ 5916 5917 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5918 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5919 struct sadb_x_nat_t_port *sport, *dport; 5920 5921 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5922 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5923 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5924 __func__)); 5925 return key_senderror(so, m, EINVAL); 5926 } 5927 5928 sport = (struct sadb_x_nat_t_port *) 5929 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5930 dport = (struct sadb_x_nat_t_port *) 5931 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5932 5933 if (sport) 5934 KEY_PORTTOSADDR(&saidx.src, 5935 sport->sadb_x_nat_t_port_port); 5936 if (dport) 5937 KEY_PORTTOSADDR(&saidx.dst, 5938 dport->sadb_x_nat_t_port_port); 5939 } 5940#endif 5941 5942 /* get a SA header */ 5943 SAHTREE_LOCK(); 5944 LIST_FOREACH(sah, &V_sahtree, chain) { 5945 if (sah->state == SADB_SASTATE_DEAD) 5946 continue; 5947 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5948 continue; 5949 5950 /* get a SA with SPI. */ 5951 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5952 if (sav) 5953 break; 5954 } 5955 SAHTREE_UNLOCK(); 5956 if (sah == NULL) { 5957 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5958 return key_senderror(so, m, ENOENT); 5959 } 5960 5961 { 5962 struct mbuf *n; 5963 u_int8_t satype; 5964 5965 /* map proto to satype */ 5966 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5967 ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5968 __func__)); 5969 return key_senderror(so, m, EINVAL); 5970 } 5971 5972 /* create new sadb_msg to reply. */ 5973 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5974 mhp->msg->sadb_msg_pid); 5975 if (!n) 5976 return key_senderror(so, m, ENOBUFS); 5977 5978 m_freem(m); 5979 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5980 } 5981} 5982 5983/* XXX make it sysctl-configurable? */ 5984static void 5985key_getcomb_setlifetime(comb) 5986 struct sadb_comb *comb; 5987{ 5988 5989 comb->sadb_comb_soft_allocations = 1; 5990 comb->sadb_comb_hard_allocations = 1; 5991 comb->sadb_comb_soft_bytes = 0; 5992 comb->sadb_comb_hard_bytes = 0; 5993 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5994 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5995 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5996 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5997} 5998 5999/* 6000 * XXX reorder combinations by preference 6001 * XXX no idea if the user wants ESP authentication or not 6002 */ 6003static struct mbuf * 6004key_getcomb_esp() 6005{ 6006 struct sadb_comb *comb; 6007 struct enc_xform *algo; 6008 struct mbuf *result = NULL, *m, *n; 6009 int encmin; 6010 int i, off, o; 6011 int totlen; 6012 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6013 6014 m = NULL; 6015 for (i = 1; i <= SADB_EALG_MAX; i++) { 6016 algo = esp_algorithm_lookup(i); 6017 if (algo == NULL) 6018 continue; 6019 6020 /* discard algorithms with key size smaller than system min */ 6021 if (_BITS(algo->maxkey) < V_ipsec_esp_keymin) 6022 continue; 6023 if (_BITS(algo->minkey) < V_ipsec_esp_keymin) 6024 encmin = V_ipsec_esp_keymin; 6025 else 6026 encmin = _BITS(algo->minkey); 6027 6028 if (V_ipsec_esp_auth) 6029 m = key_getcomb_ah(); 6030 else { 6031 IPSEC_ASSERT(l <= MLEN, 6032 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6033 MGET(m, M_DONTWAIT, MT_DATA); 6034 if (m) { 6035 M_ALIGN(m, l); 6036 m->m_len = l; 6037 m->m_next = NULL; 6038 bzero(mtod(m, caddr_t), m->m_len); 6039 } 6040 } 6041 if (!m) 6042 goto fail; 6043 6044 totlen = 0; 6045 for (n = m; n; n = n->m_next) 6046 totlen += n->m_len; 6047 IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 6048 6049 for (off = 0; off < totlen; off += l) { 6050 n = m_pulldown(m, off, l, &o); 6051 if (!n) { 6052 /* m is already freed */ 6053 goto fail; 6054 } 6055 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 6056 bzero(comb, sizeof(*comb)); 6057 key_getcomb_setlifetime(comb); 6058 comb->sadb_comb_encrypt = i; 6059 comb->sadb_comb_encrypt_minbits = encmin; 6060 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6061 } 6062 6063 if (!result) 6064 result = m; 6065 else 6066 m_cat(result, m); 6067 } 6068 6069 return result; 6070 6071 fail: 6072 if (result) 6073 m_freem(result); 6074 return NULL; 6075} 6076 6077static void 6078key_getsizes_ah( 6079 const struct auth_hash *ah, 6080 int alg, 6081 u_int16_t* min, 6082 u_int16_t* max) 6083{ 6084 6085 *min = *max = ah->keysize; 6086 if (ah->keysize == 0) { 6087 /* 6088 * Transform takes arbitrary key size but algorithm 6089 * key size is restricted. Enforce this here. 6090 */ 6091 switch (alg) { 6092 case SADB_X_AALG_MD5: *min = *max = 16; break; 6093 case SADB_X_AALG_SHA: *min = *max = 20; break; 6094 case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 6095 case SADB_X_AALG_SHA2_256: *min = *max = 32; break; 6096 case SADB_X_AALG_SHA2_384: *min = *max = 48; break; 6097 case SADB_X_AALG_SHA2_512: *min = *max = 64; break; 6098 default: 6099 DPRINTF(("%s: unknown AH algorithm %u\n", 6100 __func__, alg)); 6101 break; 6102 } 6103 } 6104} 6105 6106/* 6107 * XXX reorder combinations by preference 6108 */ 6109static struct mbuf * 6110key_getcomb_ah() 6111{ 6112 struct sadb_comb *comb; 6113 struct auth_hash *algo; 6114 struct mbuf *m; 6115 u_int16_t minkeysize, maxkeysize; 6116 int i; 6117 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6118 6119 m = NULL; 6120 for (i = 1; i <= SADB_AALG_MAX; i++) { 6121#if 1 6122 /* we prefer HMAC algorithms, not old algorithms */ 6123 if (i != SADB_AALG_SHA1HMAC && 6124 i != SADB_AALG_MD5HMAC && 6125 i != SADB_X_AALG_SHA2_256 && 6126 i != SADB_X_AALG_SHA2_384 && 6127 i != SADB_X_AALG_SHA2_512) 6128 continue; 6129#endif 6130 algo = ah_algorithm_lookup(i); 6131 if (!algo) 6132 continue; 6133 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6134 /* discard algorithms with key size smaller than system min */ 6135 if (_BITS(minkeysize) < V_ipsec_ah_keymin) 6136 continue; 6137 6138 if (!m) { 6139 IPSEC_ASSERT(l <= MLEN, 6140 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6141 MGET(m, M_DONTWAIT, MT_DATA); 6142 if (m) { 6143 M_ALIGN(m, l); 6144 m->m_len = l; 6145 m->m_next = NULL; 6146 } 6147 } else 6148 M_PREPEND(m, l, M_DONTWAIT); 6149 if (!m) 6150 return NULL; 6151 6152 comb = mtod(m, struct sadb_comb *); 6153 bzero(comb, sizeof(*comb)); 6154 key_getcomb_setlifetime(comb); 6155 comb->sadb_comb_auth = i; 6156 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6157 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6158 } 6159 6160 return m; 6161} 6162 6163/* 6164 * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 6165 * XXX reorder combinations by preference 6166 */ 6167static struct mbuf * 6168key_getcomb_ipcomp() 6169{ 6170 struct sadb_comb *comb; 6171 struct comp_algo *algo; 6172 struct mbuf *m; 6173 int i; 6174 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6175 6176 m = NULL; 6177 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6178 algo = ipcomp_algorithm_lookup(i); 6179 if (!algo) 6180 continue; 6181 6182 if (!m) { 6183 IPSEC_ASSERT(l <= MLEN, 6184 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6185 MGET(m, M_DONTWAIT, MT_DATA); 6186 if (m) { 6187 M_ALIGN(m, l); 6188 m->m_len = l; 6189 m->m_next = NULL; 6190 } 6191 } else 6192 M_PREPEND(m, l, M_DONTWAIT); 6193 if (!m) 6194 return NULL; 6195 6196 comb = mtod(m, struct sadb_comb *); 6197 bzero(comb, sizeof(*comb)); 6198 key_getcomb_setlifetime(comb); 6199 comb->sadb_comb_encrypt = i; 6200 /* what should we set into sadb_comb_*_{min,max}bits? */ 6201 } 6202 6203 return m; 6204} 6205 6206/* 6207 * XXX no way to pass mode (transport/tunnel) to userland 6208 * XXX replay checking? 6209 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6210 */ 6211static struct mbuf * 6212key_getprop(saidx) 6213 const struct secasindex *saidx; 6214{ 6215 struct sadb_prop *prop; 6216 struct mbuf *m, *n; 6217 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6218 int totlen; 6219 6220 switch (saidx->proto) { 6221 case IPPROTO_ESP: 6222 m = key_getcomb_esp(); 6223 break; 6224 case IPPROTO_AH: 6225 m = key_getcomb_ah(); 6226 break; 6227 case IPPROTO_IPCOMP: 6228 m = key_getcomb_ipcomp(); 6229 break; 6230 default: 6231 return NULL; 6232 } 6233 6234 if (!m) 6235 return NULL; 6236 M_PREPEND(m, l, M_DONTWAIT); 6237 if (!m) 6238 return NULL; 6239 6240 totlen = 0; 6241 for (n = m; n; n = n->m_next) 6242 totlen += n->m_len; 6243 6244 prop = mtod(m, struct sadb_prop *); 6245 bzero(prop, sizeof(*prop)); 6246 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6247 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6248 prop->sadb_prop_replay = 32; /* XXX */ 6249 6250 return m; 6251} 6252 6253/* 6254 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6255 * send 6256 * <base, SA, address(SD), (address(P)), x_policy, 6257 * (identity(SD),) (sensitivity,) proposal> 6258 * to KMD, and expect to receive 6259 * <base> with SADB_ACQUIRE if error occured, 6260 * or 6261 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6262 * from KMD by PF_KEY. 6263 * 6264 * XXX x_policy is outside of RFC2367 (KAME extension). 6265 * XXX sensitivity is not supported. 6266 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6267 * see comment for key_getcomb_ipcomp(). 6268 * 6269 * OUT: 6270 * 0 : succeed 6271 * others: error number 6272 */ 6273static int 6274key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6275{ 6276 struct mbuf *result = NULL, *m; 6277 struct secacq *newacq; 6278 u_int8_t satype; 6279 int error = -1; 6280 u_int32_t seq; 6281 6282 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 6283 satype = key_proto2satype(saidx->proto); 6284 IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 6285 6286 /* 6287 * We never do anything about acquirng SA. There is anather 6288 * solution that kernel blocks to send SADB_ACQUIRE message until 6289 * getting something message from IKEd. In later case, to be 6290 * managed with ACQUIRING list. 6291 */ 6292 /* Get an entry to check whether sending message or not. */ 6293 if ((newacq = key_getacq(saidx)) != NULL) { 6294 if (V_key_blockacq_count < newacq->count) { 6295 /* reset counter and do send message. */ 6296 newacq->count = 0; 6297 } else { 6298 /* increment counter and do nothing. */ 6299 newacq->count++; 6300 return 0; 6301 } 6302 } else { 6303 /* make new entry for blocking to send SADB_ACQUIRE. */ 6304 if ((newacq = key_newacq(saidx)) == NULL) 6305 return ENOBUFS; 6306 } 6307 6308 6309 seq = newacq->seq; 6310 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6311 if (!m) { 6312 error = ENOBUFS; 6313 goto fail; 6314 } 6315 result = m; 6316 6317 /* 6318 * No SADB_X_EXT_NAT_T_* here: we do not know 6319 * anything related to NAT-T at this time. 6320 */ 6321 6322 /* set sadb_address for saidx's. */ 6323 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6324 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6325 if (!m) { 6326 error = ENOBUFS; 6327 goto fail; 6328 } 6329 m_cat(result, m); 6330 6331 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6332 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6333 if (!m) { 6334 error = ENOBUFS; 6335 goto fail; 6336 } 6337 m_cat(result, m); 6338 6339 /* XXX proxy address (optional) */ 6340 6341 /* set sadb_x_policy */ 6342 if (sp) { 6343 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6344 if (!m) { 6345 error = ENOBUFS; 6346 goto fail; 6347 } 6348 m_cat(result, m); 6349 } 6350 6351 /* XXX identity (optional) */ 6352#if 0 6353 if (idexttype && fqdn) { 6354 /* create identity extension (FQDN) */ 6355 struct sadb_ident *id; 6356 int fqdnlen; 6357 6358 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6359 id = (struct sadb_ident *)p; 6360 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6361 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6362 id->sadb_ident_exttype = idexttype; 6363 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6364 bcopy(fqdn, id + 1, fqdnlen); 6365 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6366 } 6367 6368 if (idexttype) { 6369 /* create identity extension (USERFQDN) */ 6370 struct sadb_ident *id; 6371 int userfqdnlen; 6372 6373 if (userfqdn) { 6374 /* +1 for terminating-NUL */ 6375 userfqdnlen = strlen(userfqdn) + 1; 6376 } else 6377 userfqdnlen = 0; 6378 id = (struct sadb_ident *)p; 6379 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6380 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6381 id->sadb_ident_exttype = idexttype; 6382 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6383 /* XXX is it correct? */ 6384 if (curproc && curproc->p_cred) 6385 id->sadb_ident_id = curproc->p_cred->p_ruid; 6386 if (userfqdn && userfqdnlen) 6387 bcopy(userfqdn, id + 1, userfqdnlen); 6388 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6389 } 6390#endif 6391 6392 /* XXX sensitivity (optional) */ 6393 6394 /* create proposal/combination extension */ 6395 m = key_getprop(saidx); 6396#if 0 6397 /* 6398 * spec conformant: always attach proposal/combination extension, 6399 * the problem is that we have no way to attach it for ipcomp, 6400 * due to the way sadb_comb is declared in RFC2367. 6401 */ 6402 if (!m) { 6403 error = ENOBUFS; 6404 goto fail; 6405 } 6406 m_cat(result, m); 6407#else 6408 /* 6409 * outside of spec; make proposal/combination extension optional. 6410 */ 6411 if (m) 6412 m_cat(result, m); 6413#endif 6414 6415 if ((result->m_flags & M_PKTHDR) == 0) { 6416 error = EINVAL; 6417 goto fail; 6418 } 6419 6420 if (result->m_len < sizeof(struct sadb_msg)) { 6421 result = m_pullup(result, sizeof(struct sadb_msg)); 6422 if (result == NULL) { 6423 error = ENOBUFS; 6424 goto fail; 6425 } 6426 } 6427 6428 result->m_pkthdr.len = 0; 6429 for (m = result; m; m = m->m_next) 6430 result->m_pkthdr.len += m->m_len; 6431 6432 mtod(result, struct sadb_msg *)->sadb_msg_len = 6433 PFKEY_UNIT64(result->m_pkthdr.len); 6434 6435 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6436 6437 fail: 6438 if (result) 6439 m_freem(result); 6440 return error; 6441} 6442 6443static struct secacq * 6444key_newacq(const struct secasindex *saidx) 6445{ 6446 struct secacq *newacq; 6447 6448 /* get new entry */ 6449 newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6450 if (newacq == NULL) { 6451 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6452 return NULL; 6453 } 6454 6455 /* copy secindex */ 6456 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6457 newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); 6458 newacq->created = time_second; 6459 newacq->count = 0; 6460 6461 /* add to acqtree */ 6462 ACQ_LOCK(); 6463 LIST_INSERT_HEAD(&V_acqtree, newacq, chain); 6464 ACQ_UNLOCK(); 6465 6466 return newacq; 6467} 6468 6469static struct secacq * 6470key_getacq(const struct secasindex *saidx) 6471{ 6472 struct secacq *acq; 6473 6474 ACQ_LOCK(); 6475 LIST_FOREACH(acq, &V_acqtree, chain) { 6476 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6477 break; 6478 } 6479 ACQ_UNLOCK(); 6480 6481 return acq; 6482} 6483 6484static struct secacq * 6485key_getacqbyseq(seq) 6486 u_int32_t seq; 6487{ 6488 struct secacq *acq; 6489 6490 ACQ_LOCK(); 6491 LIST_FOREACH(acq, &V_acqtree, chain) { 6492 if (acq->seq == seq) 6493 break; 6494 } 6495 ACQ_UNLOCK(); 6496 6497 return acq; 6498} 6499 6500static struct secspacq * 6501key_newspacq(spidx) 6502 struct secpolicyindex *spidx; 6503{ 6504 struct secspacq *acq; 6505 6506 /* get new entry */ 6507 acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6508 if (acq == NULL) { 6509 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6510 return NULL; 6511 } 6512 6513 /* copy secindex */ 6514 bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6515 acq->created = time_second; 6516 acq->count = 0; 6517 6518 /* add to spacqtree */ 6519 SPACQ_LOCK(); 6520 LIST_INSERT_HEAD(&V_spacqtree, acq, chain); 6521 SPACQ_UNLOCK(); 6522 6523 return acq; 6524} 6525 6526static struct secspacq * 6527key_getspacq(spidx) 6528 struct secpolicyindex *spidx; 6529{ 6530 struct secspacq *acq; 6531 6532 SPACQ_LOCK(); 6533 LIST_FOREACH(acq, &V_spacqtree, chain) { 6534 if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 6535 /* NB: return holding spacq_lock */ 6536 return acq; 6537 } 6538 } 6539 SPACQ_UNLOCK(); 6540 6541 return NULL; 6542} 6543 6544/* 6545 * SADB_ACQUIRE processing, 6546 * in first situation, is receiving 6547 * <base> 6548 * from the ikmpd, and clear sequence of its secasvar entry. 6549 * 6550 * In second situation, is receiving 6551 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6552 * from a user land process, and return 6553 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6554 * to the socket. 6555 * 6556 * m will always be freed. 6557 */ 6558static int 6559key_acquire2(so, m, mhp) 6560 struct socket *so; 6561 struct mbuf *m; 6562 const struct sadb_msghdr *mhp; 6563{ 6564 const struct sadb_address *src0, *dst0; 6565 struct secasindex saidx; 6566 struct secashead *sah; 6567 u_int16_t proto; 6568 int error; 6569 6570 IPSEC_ASSERT(so != NULL, ("null socket")); 6571 IPSEC_ASSERT(m != NULL, ("null mbuf")); 6572 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6573 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6574 6575 /* 6576 * Error message from KMd. 6577 * We assume that if error was occured in IKEd, the length of PFKEY 6578 * message is equal to the size of sadb_msg structure. 6579 * We do not raise error even if error occured in this function. 6580 */ 6581 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6582 struct secacq *acq; 6583 6584 /* check sequence number */ 6585 if (mhp->msg->sadb_msg_seq == 0) { 6586 ipseclog((LOG_DEBUG, "%s: must specify sequence " 6587 "number.\n", __func__)); 6588 m_freem(m); 6589 return 0; 6590 } 6591 6592 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6593 /* 6594 * the specified larval SA is already gone, or we got 6595 * a bogus sequence number. we can silently ignore it. 6596 */ 6597 m_freem(m); 6598 return 0; 6599 } 6600 6601 /* reset acq counter in order to deletion by timehander. */ 6602 acq->created = time_second; 6603 acq->count = 0; 6604 m_freem(m); 6605 return 0; 6606 } 6607 6608 /* 6609 * This message is from user land. 6610 */ 6611 6612 /* map satype to proto */ 6613 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6614 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6615 __func__)); 6616 return key_senderror(so, m, EINVAL); 6617 } 6618 6619 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6620 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6621 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6622 /* error */ 6623 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6624 __func__)); 6625 return key_senderror(so, m, EINVAL); 6626 } 6627 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6628 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6629 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6630 /* error */ 6631 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6632 __func__)); 6633 return key_senderror(so, m, EINVAL); 6634 } 6635 6636 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6637 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6638 6639 /* XXX boundary check against sa_len */ 6640 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6641 6642 /* 6643 * Make sure the port numbers are zero. 6644 * In case of NAT-T we will update them later if needed. 6645 */ 6646 KEY_PORTTOSADDR(&saidx.src, 0); 6647 KEY_PORTTOSADDR(&saidx.dst, 0); 6648 6649#ifndef IPSEC_NAT_T 6650 /* 6651 * Handle NAT-T info if present. 6652 */ 6653 6654 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 6655 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 6656 struct sadb_x_nat_t_port *sport, *dport; 6657 6658 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 6659 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 6660 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 6661 __func__)); 6662 return key_senderror(so, m, EINVAL); 6663 } 6664 6665 sport = (struct sadb_x_nat_t_port *) 6666 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 6667 dport = (struct sadb_x_nat_t_port *) 6668 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 6669 6670 if (sport) 6671 KEY_PORTTOSADDR(&saidx.src, 6672 sport->sadb_x_nat_t_port_port); 6673 if (dport) 6674 KEY_PORTTOSADDR(&saidx.dst, 6675 dport->sadb_x_nat_t_port_port); 6676 } 6677#endif 6678 6679 /* get a SA index */ 6680 SAHTREE_LOCK(); 6681 LIST_FOREACH(sah, &V_sahtree, chain) { 6682 if (sah->state == SADB_SASTATE_DEAD) 6683 continue; 6684 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6685 break; 6686 } 6687 SAHTREE_UNLOCK(); 6688 if (sah != NULL) { 6689 ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 6690 return key_senderror(so, m, EEXIST); 6691 } 6692 6693 error = key_acquire(&saidx, NULL); 6694 if (error != 0) { 6695 ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 6696 __func__, mhp->msg->sadb_msg_errno)); 6697 return key_senderror(so, m, error); 6698 } 6699 6700 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6701} 6702 6703/* 6704 * SADB_REGISTER processing. 6705 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6706 * receive 6707 * <base> 6708 * from the ikmpd, and register a socket to send PF_KEY messages, 6709 * and send 6710 * <base, supported> 6711 * to KMD by PF_KEY. 6712 * If socket is detached, must free from regnode. 6713 * 6714 * m will always be freed. 6715 */ 6716static int 6717key_register(so, m, mhp) 6718 struct socket *so; 6719 struct mbuf *m; 6720 const struct sadb_msghdr *mhp; 6721{ 6722 struct secreg *reg, *newreg = 0; 6723 6724 IPSEC_ASSERT(so != NULL, ("null socket")); 6725 IPSEC_ASSERT(m != NULL, ("null mbuf")); 6726 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6727 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6728 6729 /* check for invalid register message */ 6730 if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0])) 6731 return key_senderror(so, m, EINVAL); 6732 6733 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6734 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6735 goto setmsg; 6736 6737 /* check whether existing or not */ 6738 REGTREE_LOCK(); 6739 LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) { 6740 if (reg->so == so) { 6741 REGTREE_UNLOCK(); 6742 ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6743 __func__)); 6744 return key_senderror(so, m, EEXIST); 6745 } 6746 } 6747 6748 /* create regnode */ 6749 newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6750 if (newreg == NULL) { 6751 REGTREE_UNLOCK(); 6752 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6753 return key_senderror(so, m, ENOBUFS); 6754 } 6755 6756 newreg->so = so; 6757 ((struct keycb *)sotorawcb(so))->kp_registered++; 6758 6759 /* add regnode to regtree. */ 6760 LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain); 6761 REGTREE_UNLOCK(); 6762 6763 setmsg: 6764 { 6765 struct mbuf *n; 6766 struct sadb_msg *newmsg; 6767 struct sadb_supported *sup; 6768 u_int len, alen, elen; 6769 int off; 6770 int i; 6771 struct sadb_alg *alg; 6772 6773 /* create new sadb_msg to reply. */ 6774 alen = 0; 6775 for (i = 1; i <= SADB_AALG_MAX; i++) { 6776 if (ah_algorithm_lookup(i)) 6777 alen += sizeof(struct sadb_alg); 6778 } 6779 if (alen) 6780 alen += sizeof(struct sadb_supported); 6781 elen = 0; 6782 for (i = 1; i <= SADB_EALG_MAX; i++) { 6783 if (esp_algorithm_lookup(i)) 6784 elen += sizeof(struct sadb_alg); 6785 } 6786 if (elen) 6787 elen += sizeof(struct sadb_supported); 6788 6789 len = sizeof(struct sadb_msg) + alen + elen; 6790 6791 if (len > MCLBYTES) 6792 return key_senderror(so, m, ENOBUFS); 6793 6794 MGETHDR(n, M_DONTWAIT, MT_DATA); 6795 if (len > MHLEN) { 6796 MCLGET(n, M_DONTWAIT); 6797 if ((n->m_flags & M_EXT) == 0) { 6798 m_freem(n); 6799 n = NULL; 6800 } 6801 } 6802 if (!n) 6803 return key_senderror(so, m, ENOBUFS); 6804 6805 n->m_pkthdr.len = n->m_len = len; 6806 n->m_next = NULL; 6807 off = 0; 6808 6809 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6810 newmsg = mtod(n, struct sadb_msg *); 6811 newmsg->sadb_msg_errno = 0; 6812 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6813 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6814 6815 /* for authentication algorithm */ 6816 if (alen) { 6817 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6818 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6819 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6820 off += PFKEY_ALIGN8(sizeof(*sup)); 6821 6822 for (i = 1; i <= SADB_AALG_MAX; i++) { 6823 struct auth_hash *aalgo; 6824 u_int16_t minkeysize, maxkeysize; 6825 6826 aalgo = ah_algorithm_lookup(i); 6827 if (!aalgo) 6828 continue; 6829 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6830 alg->sadb_alg_id = i; 6831 alg->sadb_alg_ivlen = 0; 6832 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6833 alg->sadb_alg_minbits = _BITS(minkeysize); 6834 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6835 off += PFKEY_ALIGN8(sizeof(*alg)); 6836 } 6837 } 6838 6839 /* for encryption algorithm */ 6840 if (elen) { 6841 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6842 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6843 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6844 off += PFKEY_ALIGN8(sizeof(*sup)); 6845 6846 for (i = 1; i <= SADB_EALG_MAX; i++) { 6847 struct enc_xform *ealgo; 6848 6849 ealgo = esp_algorithm_lookup(i); 6850 if (!ealgo) 6851 continue; 6852 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6853 alg->sadb_alg_id = i; 6854 alg->sadb_alg_ivlen = ealgo->blocksize; 6855 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6856 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6857 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6858 } 6859 } 6860 6861 IPSEC_ASSERT(off == len, 6862 ("length assumption failed (off %u len %u)", off, len)); 6863 6864 m_freem(m); 6865 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6866 } 6867} 6868 6869/* 6870 * free secreg entry registered. 6871 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6872 */ 6873void 6874key_freereg(struct socket *so) 6875{ 6876 struct secreg *reg; 6877 int i; 6878 6879 IPSEC_ASSERT(so != NULL, ("NULL so")); 6880 6881 /* 6882 * check whether existing or not. 6883 * check all type of SA, because there is a potential that 6884 * one socket is registered to multiple type of SA. 6885 */ 6886 REGTREE_LOCK(); 6887 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6888 LIST_FOREACH(reg, &V_regtree[i], chain) { 6889 if (reg->so == so && __LIST_CHAINED(reg)) { 6890 LIST_REMOVE(reg, chain); 6891 free(reg, M_IPSEC_SAR); 6892 break; 6893 } 6894 } 6895 } 6896 REGTREE_UNLOCK(); 6897} 6898 6899/* 6900 * SADB_EXPIRE processing 6901 * send 6902 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6903 * to KMD by PF_KEY. 6904 * NOTE: We send only soft lifetime extension. 6905 * 6906 * OUT: 0 : succeed 6907 * others : error number 6908 */ 6909static int 6910key_expire(struct secasvar *sav) 6911{ 6912 int s; 6913 int satype; 6914 struct mbuf *result = NULL, *m; 6915 int len; 6916 int error = -1; 6917 struct sadb_lifetime *lt; 6918 6919 /* XXX: Why do we lock ? */ 6920 s = splnet(); /*called from softclock()*/ 6921 6922 IPSEC_ASSERT (sav != NULL, ("null sav")); 6923 IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6924 6925 /* set msg header */ 6926 satype = key_proto2satype(sav->sah->saidx.proto); 6927 IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6928 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6929 if (!m) { 6930 error = ENOBUFS; 6931 goto fail; 6932 } 6933 result = m; 6934 6935 /* create SA extension */ 6936 m = key_setsadbsa(sav); 6937 if (!m) { 6938 error = ENOBUFS; 6939 goto fail; 6940 } 6941 m_cat(result, m); 6942 6943 /* create SA extension */ 6944 m = key_setsadbxsa2(sav->sah->saidx.mode, 6945 sav->replay ? sav->replay->count : 0, 6946 sav->sah->saidx.reqid); 6947 if (!m) { 6948 error = ENOBUFS; 6949 goto fail; 6950 } 6951 m_cat(result, m); 6952 6953 /* create lifetime extension (current and soft) */ 6954 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6955 m = key_alloc_mbuf(len); 6956 if (!m || m->m_next) { /*XXX*/ 6957 if (m) 6958 m_freem(m); 6959 error = ENOBUFS; 6960 goto fail; 6961 } 6962 bzero(mtod(m, caddr_t), len); 6963 lt = mtod(m, struct sadb_lifetime *); 6964 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6965 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6966 lt->sadb_lifetime_allocations = sav->lft_c->allocations; 6967 lt->sadb_lifetime_bytes = sav->lft_c->bytes; 6968 lt->sadb_lifetime_addtime = sav->lft_c->addtime; 6969 lt->sadb_lifetime_usetime = sav->lft_c->usetime; 6970 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6971 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6972 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 6973 lt->sadb_lifetime_allocations = sav->lft_s->allocations; 6974 lt->sadb_lifetime_bytes = sav->lft_s->bytes; 6975 lt->sadb_lifetime_addtime = sav->lft_s->addtime; 6976 lt->sadb_lifetime_usetime = sav->lft_s->usetime; 6977 m_cat(result, m); 6978 6979 /* set sadb_address for source */ 6980 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6981 &sav->sah->saidx.src.sa, 6982 FULLMASK, IPSEC_ULPROTO_ANY); 6983 if (!m) { 6984 error = ENOBUFS; 6985 goto fail; 6986 } 6987 m_cat(result, m); 6988 6989 /* set sadb_address for destination */ 6990 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6991 &sav->sah->saidx.dst.sa, 6992 FULLMASK, IPSEC_ULPROTO_ANY); 6993 if (!m) { 6994 error = ENOBUFS; 6995 goto fail; 6996 } 6997 m_cat(result, m); 6998 6999 /* 7000 * XXX-BZ Handle NAT-T extensions here. 7001 */ 7002 7003 if ((result->m_flags & M_PKTHDR) == 0) { 7004 error = EINVAL; 7005 goto fail; 7006 } 7007 7008 if (result->m_len < sizeof(struct sadb_msg)) { 7009 result = m_pullup(result, sizeof(struct sadb_msg)); 7010 if (result == NULL) { 7011 error = ENOBUFS; 7012 goto fail; 7013 } 7014 } 7015 7016 result->m_pkthdr.len = 0; 7017 for (m = result; m; m = m->m_next) 7018 result->m_pkthdr.len += m->m_len; 7019 7020 mtod(result, struct sadb_msg *)->sadb_msg_len = 7021 PFKEY_UNIT64(result->m_pkthdr.len); 7022 7023 splx(s); 7024 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7025 7026 fail: 7027 if (result) 7028 m_freem(result); 7029 splx(s); 7030 return error; 7031} 7032 7033/* 7034 * SADB_FLUSH processing 7035 * receive 7036 * <base> 7037 * from the ikmpd, and free all entries in secastree. 7038 * and send, 7039 * <base> 7040 * to the ikmpd. 7041 * NOTE: to do is only marking SADB_SASTATE_DEAD. 7042 * 7043 * m will always be freed. 7044 */ 7045static int 7046key_flush(so, m, mhp) 7047 struct socket *so; 7048 struct mbuf *m; 7049 const struct sadb_msghdr *mhp; 7050{ 7051 struct sadb_msg *newmsg; 7052 struct secashead *sah, *nextsah; 7053 struct secasvar *sav, *nextsav; 7054 u_int16_t proto; 7055 u_int8_t state; 7056 u_int stateidx; 7057 7058 IPSEC_ASSERT(so != NULL, ("null socket")); 7059 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7060 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7061 7062 /* map satype to proto */ 7063 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7064 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7065 __func__)); 7066 return key_senderror(so, m, EINVAL); 7067 } 7068 7069 /* no SATYPE specified, i.e. flushing all SA. */ 7070 SAHTREE_LOCK(); 7071 for (sah = LIST_FIRST(&V_sahtree); 7072 sah != NULL; 7073 sah = nextsah) { 7074 nextsah = LIST_NEXT(sah, chain); 7075 7076 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7077 && proto != sah->saidx.proto) 7078 continue; 7079 7080 for (stateidx = 0; 7081 stateidx < _ARRAYLEN(saorder_state_alive); 7082 stateidx++) { 7083 state = saorder_state_any[stateidx]; 7084 for (sav = LIST_FIRST(&sah->savtree[state]); 7085 sav != NULL; 7086 sav = nextsav) { 7087 7088 nextsav = LIST_NEXT(sav, chain); 7089 7090 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7091 KEY_FREESAV(&sav); 7092 } 7093 } 7094 7095 sah->state = SADB_SASTATE_DEAD; 7096 } 7097 SAHTREE_UNLOCK(); 7098 7099 if (m->m_len < sizeof(struct sadb_msg) || 7100 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7101 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 7102 return key_senderror(so, m, ENOBUFS); 7103 } 7104 7105 if (m->m_next) 7106 m_freem(m->m_next); 7107 m->m_next = NULL; 7108 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7109 newmsg = mtod(m, struct sadb_msg *); 7110 newmsg->sadb_msg_errno = 0; 7111 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7112 7113 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7114} 7115 7116/* 7117 * SADB_DUMP processing 7118 * dump all entries including status of DEAD in SAD. 7119 * receive 7120 * <base> 7121 * from the ikmpd, and dump all secasvar leaves 7122 * and send, 7123 * <base> ..... 7124 * to the ikmpd. 7125 * 7126 * m will always be freed. 7127 */ 7128static int 7129key_dump(so, m, mhp) 7130 struct socket *so; 7131 struct mbuf *m; 7132 const struct sadb_msghdr *mhp; 7133{ 7134 struct secashead *sah; 7135 struct secasvar *sav; 7136 u_int16_t proto; 7137 u_int stateidx; 7138 u_int8_t satype; 7139 u_int8_t state; 7140 int cnt; 7141 struct sadb_msg *newmsg; 7142 struct mbuf *n; 7143 7144 IPSEC_ASSERT(so != NULL, ("null socket")); 7145 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7146 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7147 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7148 7149 /* map satype to proto */ 7150 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7151 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7152 __func__)); 7153 return key_senderror(so, m, EINVAL); 7154 } 7155 7156 /* count sav entries to be sent to the userland. */ 7157 cnt = 0; 7158 SAHTREE_LOCK(); 7159 LIST_FOREACH(sah, &V_sahtree, chain) { 7160 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7161 && proto != sah->saidx.proto) 7162 continue; 7163 7164 for (stateidx = 0; 7165 stateidx < _ARRAYLEN(saorder_state_any); 7166 stateidx++) { 7167 state = saorder_state_any[stateidx]; 7168 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7169 cnt++; 7170 } 7171 } 7172 } 7173 7174 if (cnt == 0) { 7175 SAHTREE_UNLOCK(); 7176 return key_senderror(so, m, ENOENT); 7177 } 7178 7179 /* send this to the userland, one at a time. */ 7180 newmsg = NULL; 7181 LIST_FOREACH(sah, &V_sahtree, chain) { 7182 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7183 && proto != sah->saidx.proto) 7184 continue; 7185 7186 /* map proto to satype */ 7187 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7188 SAHTREE_UNLOCK(); 7189 ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 7190 "SAD.\n", __func__)); 7191 return key_senderror(so, m, EINVAL); 7192 } 7193 7194 for (stateidx = 0; 7195 stateidx < _ARRAYLEN(saorder_state_any); 7196 stateidx++) { 7197 state = saorder_state_any[stateidx]; 7198 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7199 n = key_setdumpsa(sav, SADB_DUMP, satype, 7200 --cnt, mhp->msg->sadb_msg_pid); 7201 if (!n) { 7202 SAHTREE_UNLOCK(); 7203 return key_senderror(so, m, ENOBUFS); 7204 } 7205 key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 7206 } 7207 } 7208 } 7209 SAHTREE_UNLOCK(); 7210 7211 m_freem(m); 7212 return 0; 7213} 7214 7215/* 7216 * SADB_X_PROMISC processing 7217 * 7218 * m will always be freed. 7219 */ 7220static int 7221key_promisc(so, m, mhp) 7222 struct socket *so; 7223 struct mbuf *m; 7224 const struct sadb_msghdr *mhp; 7225{ 7226 int olen; 7227 7228 IPSEC_ASSERT(so != NULL, ("null socket")); 7229 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7230 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7231 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7232 7233 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7234 7235 if (olen < sizeof(struct sadb_msg)) { 7236#if 1 7237 return key_senderror(so, m, EINVAL); 7238#else 7239 m_freem(m); 7240 return 0; 7241#endif 7242 } else if (olen == sizeof(struct sadb_msg)) { 7243 /* enable/disable promisc mode */ 7244 struct keycb *kp; 7245 7246 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7247 return key_senderror(so, m, EINVAL); 7248 mhp->msg->sadb_msg_errno = 0; 7249 switch (mhp->msg->sadb_msg_satype) { 7250 case 0: 7251 case 1: 7252 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7253 break; 7254 default: 7255 return key_senderror(so, m, EINVAL); 7256 } 7257 7258 /* send the original message back to everyone */ 7259 mhp->msg->sadb_msg_errno = 0; 7260 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7261 } else { 7262 /* send packet as is */ 7263 7264 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7265 7266 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7267 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7268 } 7269} 7270 7271static int (*key_typesw[]) __P((struct socket *, struct mbuf *, 7272 const struct sadb_msghdr *)) = { 7273 NULL, /* SADB_RESERVED */ 7274 key_getspi, /* SADB_GETSPI */ 7275 key_update, /* SADB_UPDATE */ 7276 key_add, /* SADB_ADD */ 7277 key_delete, /* SADB_DELETE */ 7278 key_get, /* SADB_GET */ 7279 key_acquire2, /* SADB_ACQUIRE */ 7280 key_register, /* SADB_REGISTER */ 7281 NULL, /* SADB_EXPIRE */ 7282 key_flush, /* SADB_FLUSH */ 7283 key_dump, /* SADB_DUMP */ 7284 key_promisc, /* SADB_X_PROMISC */ 7285 NULL, /* SADB_X_PCHANGE */ 7286 key_spdadd, /* SADB_X_SPDUPDATE */ 7287 key_spdadd, /* SADB_X_SPDADD */ 7288 key_spddelete, /* SADB_X_SPDDELETE */ 7289 key_spdget, /* SADB_X_SPDGET */ 7290 NULL, /* SADB_X_SPDACQUIRE */ 7291 key_spddump, /* SADB_X_SPDDUMP */ 7292 key_spdflush, /* SADB_X_SPDFLUSH */ 7293 key_spdadd, /* SADB_X_SPDSETIDX */ 7294 NULL, /* SADB_X_SPDEXPIRE */ 7295 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7296}; 7297 7298/* 7299 * parse sadb_msg buffer to process PFKEYv2, 7300 * and create a data to response if needed. 7301 * I think to be dealed with mbuf directly. 7302 * IN: 7303 * msgp : pointer to pointer to a received buffer pulluped. 7304 * This is rewrited to response. 7305 * so : pointer to socket. 7306 * OUT: 7307 * length for buffer to send to user process. 7308 */ 7309int 7310key_parse(m, so) 7311 struct mbuf *m; 7312 struct socket *so; 7313{ 7314 struct sadb_msg *msg; 7315 struct sadb_msghdr mh; 7316 u_int orglen; 7317 int error; 7318 int target; 7319 7320 IPSEC_ASSERT(so != NULL, ("null socket")); 7321 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7322 7323#if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7324 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7325 ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 7326 kdebug_sadb(msg)); 7327#endif 7328 7329 if (m->m_len < sizeof(struct sadb_msg)) { 7330 m = m_pullup(m, sizeof(struct sadb_msg)); 7331 if (!m) 7332 return ENOBUFS; 7333 } 7334 msg = mtod(m, struct sadb_msg *); 7335 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7336 target = KEY_SENDUP_ONE; 7337 7338 if ((m->m_flags & M_PKTHDR) == 0 || 7339 m->m_pkthdr.len != m->m_pkthdr.len) { 7340 ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 7341 V_pfkeystat.out_invlen++; 7342 error = EINVAL; 7343 goto senderror; 7344 } 7345 7346 if (msg->sadb_msg_version != PF_KEY_V2) { 7347 ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 7348 __func__, msg->sadb_msg_version)); 7349 V_pfkeystat.out_invver++; 7350 error = EINVAL; 7351 goto senderror; 7352 } 7353 7354 if (msg->sadb_msg_type > SADB_MAX) { 7355 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7356 __func__, msg->sadb_msg_type)); 7357 V_pfkeystat.out_invmsgtype++; 7358 error = EINVAL; 7359 goto senderror; 7360 } 7361 7362 /* for old-fashioned code - should be nuked */ 7363 if (m->m_pkthdr.len > MCLBYTES) { 7364 m_freem(m); 7365 return ENOBUFS; 7366 } 7367 if (m->m_next) { 7368 struct mbuf *n; 7369 7370 MGETHDR(n, M_DONTWAIT, MT_DATA); 7371 if (n && m->m_pkthdr.len > MHLEN) { 7372 MCLGET(n, M_DONTWAIT); 7373 if ((n->m_flags & M_EXT) == 0) { 7374 m_free(n); 7375 n = NULL; 7376 } 7377 } 7378 if (!n) { 7379 m_freem(m); 7380 return ENOBUFS; 7381 } 7382 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 7383 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7384 n->m_next = NULL; 7385 m_freem(m); 7386 m = n; 7387 } 7388 7389 /* align the mbuf chain so that extensions are in contiguous region. */ 7390 error = key_align(m, &mh); 7391 if (error) 7392 return error; 7393 7394 msg = mh.msg; 7395 7396 /* check SA type */ 7397 switch (msg->sadb_msg_satype) { 7398 case SADB_SATYPE_UNSPEC: 7399 switch (msg->sadb_msg_type) { 7400 case SADB_GETSPI: 7401 case SADB_UPDATE: 7402 case SADB_ADD: 7403 case SADB_DELETE: 7404 case SADB_GET: 7405 case SADB_ACQUIRE: 7406 case SADB_EXPIRE: 7407 ipseclog((LOG_DEBUG, "%s: must specify satype " 7408 "when msg type=%u.\n", __func__, 7409 msg->sadb_msg_type)); 7410 V_pfkeystat.out_invsatype++; 7411 error = EINVAL; 7412 goto senderror; 7413 } 7414 break; 7415 case SADB_SATYPE_AH: 7416 case SADB_SATYPE_ESP: 7417 case SADB_X_SATYPE_IPCOMP: 7418 case SADB_X_SATYPE_TCPSIGNATURE: 7419 switch (msg->sadb_msg_type) { 7420 case SADB_X_SPDADD: 7421 case SADB_X_SPDDELETE: 7422 case SADB_X_SPDGET: 7423 case SADB_X_SPDDUMP: 7424 case SADB_X_SPDFLUSH: 7425 case SADB_X_SPDSETIDX: 7426 case SADB_X_SPDUPDATE: 7427 case SADB_X_SPDDELETE2: 7428 ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 7429 __func__, msg->sadb_msg_type)); 7430 V_pfkeystat.out_invsatype++; 7431 error = EINVAL; 7432 goto senderror; 7433 } 7434 break; 7435 case SADB_SATYPE_RSVP: 7436 case SADB_SATYPE_OSPFV2: 7437 case SADB_SATYPE_RIPV2: 7438 case SADB_SATYPE_MIP: 7439 ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 7440 __func__, msg->sadb_msg_satype)); 7441 V_pfkeystat.out_invsatype++; 7442 error = EOPNOTSUPP; 7443 goto senderror; 7444 case 1: /* XXX: What does it do? */ 7445 if (msg->sadb_msg_type == SADB_X_PROMISC) 7446 break; 7447 /*FALLTHROUGH*/ 7448 default: 7449 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7450 __func__, msg->sadb_msg_satype)); 7451 V_pfkeystat.out_invsatype++; 7452 error = EINVAL; 7453 goto senderror; 7454 } 7455 7456 /* check field of upper layer protocol and address family */ 7457 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7458 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7459 struct sadb_address *src0, *dst0; 7460 u_int plen; 7461 7462 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7463 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7464 7465 /* check upper layer protocol */ 7466 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7467 ipseclog((LOG_DEBUG, "%s: upper layer protocol " 7468 "mismatched.\n", __func__)); 7469 V_pfkeystat.out_invaddr++; 7470 error = EINVAL; 7471 goto senderror; 7472 } 7473 7474 /* check family */ 7475 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7476 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7477 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 7478 __func__)); 7479 V_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, "%s: address struct size " 7486 "mismatched.\n", __func__)); 7487 V_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 V_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 V_pfkeystat.out_invaddr++; 7505 error = EINVAL; 7506 goto senderror; 7507 } 7508 break; 7509 default: 7510 ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 7511 __func__)); 7512 V_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, "%s: illegal prefixlen.\n", 7533 __func__)); 7534 V_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 V_pfkeystat.out_invmsgtype++; 7548 error = EINVAL; 7549 goto senderror; 7550 } 7551 7552 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7553 7554senderror: 7555 msg->sadb_msg_errno = error; 7556 return key_sendup_mbuf(so, m, target); 7557} 7558 7559static int 7560key_senderror(so, m, code) 7561 struct socket *so; 7562 struct mbuf *m; 7563 int code; 7564{ 7565 struct sadb_msg *msg; 7566 7567 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7568 ("mbuf too small, len %u", m->m_len)); 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 */ 7580static int 7581key_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 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7592 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7593 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7594 ("mbuf too small, len %u", m->m_len)); 7595 7596 /* initialize */ 7597 bzero(mhp, sizeof(*mhp)); 7598 7599 mhp->msg = mtod(m, struct sadb_msg *); 7600 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7601 7602 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7603 extlen = end; /*just in case extlen is not updated*/ 7604 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7605 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7606 if (!n) { 7607 /* m is already freed */ 7608 return ENOBUFS; 7609 } 7610 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7611 7612 /* set pointer */ 7613 switch (ext->sadb_ext_type) { 7614 case SADB_EXT_SA: 7615 case SADB_EXT_ADDRESS_SRC: 7616 case SADB_EXT_ADDRESS_DST: 7617 case SADB_EXT_ADDRESS_PROXY: 7618 case SADB_EXT_LIFETIME_CURRENT: 7619 case SADB_EXT_LIFETIME_HARD: 7620 case SADB_EXT_LIFETIME_SOFT: 7621 case SADB_EXT_KEY_AUTH: 7622 case SADB_EXT_KEY_ENCRYPT: 7623 case SADB_EXT_IDENTITY_SRC: 7624 case SADB_EXT_IDENTITY_DST: 7625 case SADB_EXT_SENSITIVITY: 7626 case SADB_EXT_PROPOSAL: 7627 case SADB_EXT_SUPPORTED_AUTH: 7628 case SADB_EXT_SUPPORTED_ENCRYPT: 7629 case SADB_EXT_SPIRANGE: 7630 case SADB_X_EXT_POLICY: 7631 case SADB_X_EXT_SA2: 7632#ifdef IPSEC_NAT_T 7633 case SADB_X_EXT_NAT_T_TYPE: 7634 case SADB_X_EXT_NAT_T_SPORT: 7635 case SADB_X_EXT_NAT_T_DPORT: 7636 case SADB_X_EXT_NAT_T_OAI: 7637 case SADB_X_EXT_NAT_T_OAR: 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, "%s: duplicate ext_type " 7647 "%u\n", __func__, ext->sadb_ext_type)); 7648 m_freem(m); 7649 V_pfkeystat.out_dupext++; 7650 return EINVAL; 7651 } 7652 break; 7653 default: 7654 ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 7655 __func__, ext->sadb_ext_type)); 7656 m_freem(m); 7657 V_pfkeystat.out_invexttype++; 7658 return EINVAL; 7659 } 7660 7661 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7662 7663 if (key_validate_ext(ext, extlen)) { 7664 m_freem(m); 7665 V_pfkeystat.out_invlen++; 7666 return EINVAL; 7667 } 7668 7669 n = m_pulldown(m, off, extlen, &toff); 7670 if (!n) { 7671 /* m is already freed */ 7672 return ENOBUFS; 7673 } 7674 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7675 7676 mhp->ext[ext->sadb_ext_type] = ext; 7677 mhp->extoff[ext->sadb_ext_type] = off; 7678 mhp->extlen[ext->sadb_ext_type] = extlen; 7679 } 7680 7681 if (off != end) { 7682 m_freem(m); 7683 V_pfkeystat.out_invlen++; 7684 return EINVAL; 7685 } 7686 7687 return 0; 7688} 7689 7690static int 7691key_validate_ext(ext, len) 7692 const struct sadb_ext *ext; 7693 int len; 7694{ 7695 const struct sockaddr *sa; 7696 enum { NONE, ADDR } checktype = NONE; 7697 int baselen = 0; 7698 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7699 7700 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7701 return EINVAL; 7702 7703 /* if it does not match minimum/maximum length, bail */ 7704 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7705 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7706 return EINVAL; 7707 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7708 return EINVAL; 7709 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7710 return EINVAL; 7711 7712 /* more checks based on sadb_ext_type XXX need more */ 7713 switch (ext->sadb_ext_type) { 7714 case SADB_EXT_ADDRESS_SRC: 7715 case SADB_EXT_ADDRESS_DST: 7716 case SADB_EXT_ADDRESS_PROXY: 7717 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7718 checktype = ADDR; 7719 break; 7720 case SADB_EXT_IDENTITY_SRC: 7721 case SADB_EXT_IDENTITY_DST: 7722 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7723 SADB_X_IDENTTYPE_ADDR) { 7724 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7725 checktype = ADDR; 7726 } else 7727 checktype = NONE; 7728 break; 7729 default: 7730 checktype = NONE; 7731 break; 7732 } 7733 7734 switch (checktype) { 7735 case NONE: 7736 break; 7737 case ADDR: 7738 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7739 if (len < baselen + sal) 7740 return EINVAL; 7741 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7742 return EINVAL; 7743 break; 7744 } 7745 7746 return 0; 7747} 7748 7749void 7750key_init(void) 7751{ 7752 int i; 7753 7754 for (i = 0; i < IPSEC_DIR_MAX; i++) 7755 LIST_INIT(&V_sptree[i]); 7756 7757 LIST_INIT(&V_sahtree); 7758 7759 for (i = 0; i <= SADB_SATYPE_MAX; i++) 7760 LIST_INIT(&V_regtree[i]); 7761 7762 LIST_INIT(&V_acqtree); 7763 LIST_INIT(&V_spacqtree); 7764 7765 /* system default */ 7766 V_ip4_def_policy.policy = IPSEC_POLICY_NONE; 7767 V_ip4_def_policy.refcnt++; /*never reclaim this*/ 7768 7769 if (!IS_DEFAULT_VNET(curvnet)) 7770 return; 7771 7772 SPTREE_LOCK_INIT(); 7773 REGTREE_LOCK_INIT(); 7774 SAHTREE_LOCK_INIT(); 7775 ACQ_LOCK_INIT(); 7776 SPACQ_LOCK_INIT(); 7777 7778#ifndef IPSEC_DEBUG2 7779 timeout((void *)key_timehandler, (void *)0, hz); 7780#endif /*IPSEC_DEBUG2*/ 7781 7782 /* initialize key statistics */ 7783 keystat.getspi_count = 1; 7784 7785 printf("IPsec: Initialized Security Association Processing.\n"); 7786} 7787 7788#ifdef VIMAGE 7789void 7790key_destroy(void) 7791{ 7792 struct secpolicy *sp, *nextsp; 7793 struct secacq *acq, *nextacq; 7794 struct secspacq *spacq, *nextspacq; 7795 struct secashead *sah, *nextsah; 7796 struct secreg *reg; 7797 int i; 7798 7799 SPTREE_LOCK(); 7800 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7801 for (sp = LIST_FIRST(&V_sptree[i]); 7802 sp != NULL; sp = nextsp) { 7803 nextsp = LIST_NEXT(sp, chain); 7804 if (__LIST_CHAINED(sp)) { 7805 LIST_REMOVE(sp, chain); 7806 free(sp, M_IPSEC_SP); 7807 } 7808 } 7809 } 7810 SPTREE_UNLOCK(); 7811 7812 SAHTREE_LOCK(); 7813 for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) { 7814 nextsah = LIST_NEXT(sah, chain); 7815 if (__LIST_CHAINED(sah)) { 7816 LIST_REMOVE(sah, chain); 7817 free(sah, M_IPSEC_SAH); 7818 } 7819 } 7820 SAHTREE_UNLOCK(); 7821 7822 REGTREE_LOCK(); 7823 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7824 LIST_FOREACH(reg, &V_regtree[i], chain) { 7825 if (__LIST_CHAINED(reg)) { 7826 LIST_REMOVE(reg, chain); 7827 free(reg, M_IPSEC_SAR); 7828 break; 7829 } 7830 } 7831 } 7832 REGTREE_UNLOCK(); 7833 7834 ACQ_LOCK(); 7835 for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 7836 nextacq = LIST_NEXT(acq, chain); 7837 if (__LIST_CHAINED(acq)) { 7838 LIST_REMOVE(acq, chain); 7839 free(acq, M_IPSEC_SAQ); 7840 } 7841 } 7842 ACQ_UNLOCK(); 7843 7844 SPACQ_LOCK(); 7845 for (spacq = LIST_FIRST(&V_spacqtree); spacq != NULL; 7846 spacq = nextspacq) { 7847 nextspacq = LIST_NEXT(spacq, chain); 7848 if (__LIST_CHAINED(spacq)) { 7849 LIST_REMOVE(spacq, chain); 7850 free(spacq, M_IPSEC_SAQ); 7851 } 7852 } 7853 SPACQ_UNLOCK(); 7854} 7855#endif 7856 7857/* 7858 * XXX: maybe This function is called after INBOUND IPsec processing. 7859 * 7860 * Special check for tunnel-mode packets. 7861 * We must make some checks for consistency between inner and outer IP header. 7862 * 7863 * xxx more checks to be provided 7864 */ 7865int 7866key_checktunnelsanity(sav, family, src, dst) 7867 struct secasvar *sav; 7868 u_int family; 7869 caddr_t src; 7870 caddr_t dst; 7871{ 7872 IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7873 7874 /* XXX: check inner IP header */ 7875 7876 return 1; 7877} 7878 7879/* record data transfer on SA, and update timestamps */ 7880void 7881key_sa_recordxfer(sav, m) 7882 struct secasvar *sav; 7883 struct mbuf *m; 7884{ 7885 IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7886 IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7887 if (!sav->lft_c) 7888 return; 7889 7890 /* 7891 * XXX Currently, there is a difference of bytes size 7892 * between inbound and outbound processing. 7893 */ 7894 sav->lft_c->bytes += m->m_pkthdr.len; 7895 /* to check bytes lifetime is done in key_timehandler(). */ 7896 7897 /* 7898 * We use the number of packets as the unit of 7899 * allocations. We increment the variable 7900 * whenever {esp,ah}_{in,out}put is called. 7901 */ 7902 sav->lft_c->allocations++; 7903 /* XXX check for expires? */ 7904 7905 /* 7906 * NOTE: We record CURRENT usetime by using wall clock, 7907 * in seconds. HARD and SOFT lifetime are measured by the time 7908 * difference (again in seconds) from usetime. 7909 * 7910 * usetime 7911 * v expire expire 7912 * -----+-----+--------+---> t 7913 * <--------------> HARD 7914 * <-----> SOFT 7915 */ 7916 sav->lft_c->usetime = time_second; 7917 /* XXX check for expires? */ 7918 7919 return; 7920} 7921 7922/* dumb version */ 7923void 7924key_sa_routechange(dst) 7925 struct sockaddr *dst; 7926{ 7927 struct secashead *sah; 7928 struct route *ro; 7929 7930 SAHTREE_LOCK(); 7931 LIST_FOREACH(sah, &V_sahtree, chain) { 7932 ro = &sah->route_cache.sa_route; 7933 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7934 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7935 RTFREE(ro->ro_rt); 7936 ro->ro_rt = (struct rtentry *)NULL; 7937 } 7938 } 7939 SAHTREE_UNLOCK(); 7940} 7941 7942static void 7943key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7944{ 7945 IPSEC_ASSERT(sav != NULL, ("NULL sav")); 7946 SAHTREE_LOCK_ASSERT(); 7947 7948 if (sav->state != state) { 7949 if (__LIST_CHAINED(sav)) 7950 LIST_REMOVE(sav, chain); 7951 sav->state = state; 7952 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7953 } 7954} 7955 7956void 7957key_sa_stir_iv(sav) 7958 struct secasvar *sav; 7959{ 7960 7961 IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 7962 key_randomfill(sav->iv, sav->ivlen); 7963} 7964 7965/* XXX too much? */ 7966static struct mbuf * 7967key_alloc_mbuf(l) 7968 int l; 7969{ 7970 struct mbuf *m = NULL, *n; 7971 int len, t; 7972 7973 len = l; 7974 while (len > 0) { 7975 MGET(n, M_DONTWAIT, MT_DATA); 7976 if (n && len > MLEN) 7977 MCLGET(n, M_DONTWAIT); 7978 if (!n) { 7979 m_freem(m); 7980 return NULL; 7981 } 7982 7983 n->m_next = NULL; 7984 n->m_len = 0; 7985 n->m_len = M_TRAILINGSPACE(n); 7986 /* use the bottom of mbuf, hoping we can prepend afterwards */ 7987 if (n->m_len > len) { 7988 t = (n->m_len - len) & ~(sizeof(long) - 1); 7989 n->m_data += t; 7990 n->m_len = len; 7991 } 7992 7993 len -= n->m_len; 7994 7995 if (m) 7996 m_cat(m, n); 7997 else 7998 m = n; 7999 } 8000 8001 return m; 8002} 8003 8004/* 8005 * Take one of the kernel's security keys and convert it into a PF_KEY 8006 * structure within an mbuf, suitable for sending up to a waiting 8007 * application in user land. 8008 * 8009 * IN: 8010 * src: A pointer to a kernel security key. 8011 * exttype: Which type of key this is. Refer to the PF_KEY data structures. 8012 * OUT: 8013 * a valid mbuf or NULL indicating an error 8014 * 8015 */ 8016 8017static struct mbuf * 8018key_setkey(struct seckey *src, u_int16_t exttype) 8019{ 8020 struct mbuf *m; 8021 struct sadb_key *p; 8022 int len; 8023 8024 if (src == NULL) 8025 return NULL; 8026 8027 len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); 8028 m = key_alloc_mbuf(len); 8029 if (m == NULL) 8030 return NULL; 8031 p = mtod(m, struct sadb_key *); 8032 bzero(p, len); 8033 p->sadb_key_len = PFKEY_UNIT64(len); 8034 p->sadb_key_exttype = exttype; 8035 p->sadb_key_bits = src->bits; 8036 bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src)); 8037 8038 return m; 8039} 8040 8041/* 8042 * Take one of the kernel's lifetime data structures and convert it 8043 * into a PF_KEY structure within an mbuf, suitable for sending up to 8044 * a waiting application in user land. 8045 * 8046 * IN: 8047 * src: A pointer to a kernel lifetime structure. 8048 * exttype: Which type of lifetime this is. Refer to the PF_KEY 8049 * data structures for more information. 8050 * OUT: 8051 * a valid mbuf or NULL indicating an error 8052 * 8053 */ 8054 8055static struct mbuf * 8056key_setlifetime(struct seclifetime *src, u_int16_t exttype) 8057{ 8058 struct mbuf *m = NULL; 8059 struct sadb_lifetime *p; 8060 int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime)); 8061 8062 if (src == NULL) 8063 return NULL; 8064 8065 m = key_alloc_mbuf(len); 8066 if (m == NULL) 8067 return m; 8068 p = mtod(m, struct sadb_lifetime *); 8069 8070 bzero(p, len); 8071 p->sadb_lifetime_len = PFKEY_UNIT64(len); 8072 p->sadb_lifetime_exttype = exttype; 8073 p->sadb_lifetime_allocations = src->allocations; 8074 p->sadb_lifetime_bytes = src->bytes; 8075 p->sadb_lifetime_addtime = src->addtime; 8076 p->sadb_lifetime_usetime = src->usetime; 8077 8078 return m; 8079 8080} 8081