key.c revision 194951
1/* $FreeBSD: head/sys/netipsec/key.c 194951 2009-06-25 11:52:33Z rwatson $ */ 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#include <sys/vimage.h> 60 61#include <net/if.h> 62#include <net/route.h> 63#include <net/raw_cb.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#include <netinet/vinet.h> 79#endif 80#ifdef INET6 81#include <netinet6/in6_pcb.h> 82#include <netinet6/vinet6.h> 83#endif /* INET6 */ 84 85#include <net/pfkeyv2.h> 86#include <netipsec/keydb.h> 87#include <netipsec/key.h> 88#include <netipsec/keysock.h> 89#include <netipsec/key_debug.h> 90 91#include <netipsec/ipsec.h> 92#ifdef INET6 93#include <netipsec/ipsec6.h> 94#endif 95 96#include <netipsec/xform.h> 97 98#include <machine/stdarg.h> 99 100/* randomness */ 101#include <sys/random.h> 102#include <sys/vimage.h> 103 104#define FULLMASK 0xff 105#define _BITS(bytes) ((bytes) << 3) 106 107/* 108 * Note on SA reference counting: 109 * - SAs that are not in DEAD state will have (total external reference + 1) 110 * following value in reference count field. they cannot be freed and are 111 * referenced from SA header. 112 * - SAs that are in DEAD state will have (total external reference) 113 * in reference count field. they are ready to be freed. reference from 114 * SA header will be removed in key_delsav(), when the reference count 115 * field hits 0 (= no external reference other than from SA header. 116 */ 117 118#ifdef VIMAGE_GLOBALS 119u_int32_t key_debug_level; 120static u_int key_spi_trycnt; 121static u_int32_t key_spi_minval; 122static u_int32_t key_spi_maxval; 123static u_int32_t policy_id; 124static u_int key_int_random; 125static u_int key_larval_lifetime; 126static int key_blockacq_count; 127static int key_blockacq_lifetime; 128static int key_preferred_oldsa; 129 130static u_int32_t acq_seq; 131 132static int ipsec_esp_keymin; 133static int ipsec_esp_auth; 134static int ipsec_ah_keymin; 135 136static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 137static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 138static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 139static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 140static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 141#endif /* VIMAGE_GLOBALS */ 142 143static struct mtx sptree_lock; 144#define SPTREE_LOCK_INIT() \ 145 mtx_init(&sptree_lock, "sptree", \ 146 "fast ipsec security policy database", MTX_DEF) 147#define SPTREE_LOCK_DESTROY() mtx_destroy(&sptree_lock) 148#define SPTREE_LOCK() mtx_lock(&sptree_lock) 149#define SPTREE_UNLOCK() mtx_unlock(&sptree_lock) 150#define SPTREE_LOCK_ASSERT() mtx_assert(&sptree_lock, MA_OWNED) 151 152static struct mtx sahtree_lock; 153#define SAHTREE_LOCK_INIT() \ 154 mtx_init(&sahtree_lock, "sahtree", \ 155 "fast ipsec security association database", MTX_DEF) 156#define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock) 157#define SAHTREE_LOCK() mtx_lock(&sahtree_lock) 158#define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock) 159#define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED) 160 161 /* registed list */ 162static struct mtx regtree_lock; 163#define REGTREE_LOCK_INIT() \ 164 mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF) 165#define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock) 166#define REGTREE_LOCK() mtx_lock(®tree_lock) 167#define REGTREE_UNLOCK() mtx_unlock(®tree_lock) 168#define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED) 169 170static struct mtx acq_lock; 171#define ACQ_LOCK_INIT() \ 172 mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF) 173#define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock) 174#define ACQ_LOCK() mtx_lock(&acq_lock) 175#define ACQ_UNLOCK() mtx_unlock(&acq_lock) 176#define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED) 177 178static struct mtx spacq_lock; 179#define SPACQ_LOCK_INIT() \ 180 mtx_init(&spacq_lock, "spacqtree", \ 181 "fast ipsec security policy acquire list", MTX_DEF) 182#define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock) 183#define SPACQ_LOCK() mtx_lock(&spacq_lock) 184#define SPACQ_UNLOCK() mtx_unlock(&spacq_lock) 185#define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED) 186 187/* search order for SAs */ 188static const u_int saorder_state_valid_prefer_old[] = { 189 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 190}; 191static const u_int saorder_state_valid_prefer_new[] = { 192 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 193}; 194static const u_int saorder_state_alive[] = { 195 /* except DEAD */ 196 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 197}; 198static const u_int saorder_state_any[] = { 199 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 200 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 201}; 202 203static const int minsize[] = { 204 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 205 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 206 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 207 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 208 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 209 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 210 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 211 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 212 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 213 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 214 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 215 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 216 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 217 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 218 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 219 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 220 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 221 0, /* SADB_X_EXT_KMPRIVATE */ 222 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 223 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 224 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */ 225 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */ 226 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */ 227 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 228 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 229 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ 230}; 231static const int maxsize[] = { 232 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 233 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 234 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 235 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 236 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 237 0, /* SADB_EXT_ADDRESS_SRC */ 238 0, /* SADB_EXT_ADDRESS_DST */ 239 0, /* SADB_EXT_ADDRESS_PROXY */ 240 0, /* SADB_EXT_KEY_AUTH */ 241 0, /* SADB_EXT_KEY_ENCRYPT */ 242 0, /* SADB_EXT_IDENTITY_SRC */ 243 0, /* SADB_EXT_IDENTITY_DST */ 244 0, /* SADB_EXT_SENSITIVITY */ 245 0, /* SADB_EXT_PROPOSAL */ 246 0, /* SADB_EXT_SUPPORTED_AUTH */ 247 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 248 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 249 0, /* SADB_X_EXT_KMPRIVATE */ 250 0, /* SADB_X_EXT_POLICY */ 251 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 252 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */ 253 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */ 254 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */ 255 0, /* SADB_X_EXT_NAT_T_OAI */ 256 0, /* SADB_X_EXT_NAT_T_OAR */ 257 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ 258}; 259 260#ifdef SYSCTL_DECL 261SYSCTL_DECL(_net_key); 262#endif 263 264SYSCTL_V_INT(V_NET, vnet_ipsec,_net_key, KEYCTL_DEBUG_LEVEL, debug, 265 CTLFLAG_RW, key_debug_level, 0, ""); 266 267/* max count of trial for the decision of spi value */ 268SYSCTL_V_INT(V_NET, vnet_ipsec,_net_key, KEYCTL_SPI_TRY, spi_trycnt, 269 CTLFLAG_RW, key_spi_trycnt, 0, ""); 270 271/* minimum spi value to allocate automatically. */ 272SYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_SPI_MIN_VALUE, 273 spi_minval, CTLFLAG_RW, key_spi_minval, 0, ""); 274 275/* maximun spi value to allocate automatically. */ 276SYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_SPI_MAX_VALUE, 277 spi_maxval, CTLFLAG_RW, key_spi_maxval, 0, ""); 278 279/* interval to initialize randseed */ 280SYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_RANDOM_INT, 281 int_random, CTLFLAG_RW, key_int_random, 0, ""); 282 283/* lifetime for larval SA */ 284SYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_LARVAL_LIFETIME, 285 larval_lifetime, CTLFLAG_RW, key_larval_lifetime, 0, ""); 286 287/* counter for blocking to send SADB_ACQUIRE to IKEd */ 288SYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_BLOCKACQ_COUNT, 289 blockacq_count, CTLFLAG_RW, key_blockacq_count, 0, ""); 290 291/* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 292SYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_BLOCKACQ_LIFETIME, 293 blockacq_lifetime, CTLFLAG_RW, key_blockacq_lifetime, 0, ""); 294 295/* ESP auth */ 296SYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_ESP_AUTH, esp_auth, 297 CTLFLAG_RW, ipsec_esp_auth, 0, ""); 298 299/* minimum ESP key length */ 300SYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_ESP_KEYMIN, 301 esp_keymin, CTLFLAG_RW, ipsec_esp_keymin, 0, ""); 302 303/* minimum AH key length */ 304SYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_AH_KEYMIN, ah_keymin, 305 CTLFLAG_RW, ipsec_ah_keymin, 0, ""); 306 307/* perfered old SA rather than new SA */ 308SYSCTL_V_INT(V_NET, vnet_ipsec, _net_key, KEYCTL_PREFERED_OLDSA, 309 preferred_oldsa, CTLFLAG_RW, key_preferred_oldsa, 0, ""); 310 311#define __LIST_CHAINED(elm) \ 312 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 313#define LIST_INSERT_TAIL(head, elm, type, field) \ 314do {\ 315 struct type *curelm = LIST_FIRST(head); \ 316 if (curelm == NULL) {\ 317 LIST_INSERT_HEAD(head, elm, field); \ 318 } else { \ 319 while (LIST_NEXT(curelm, field)) \ 320 curelm = LIST_NEXT(curelm, field);\ 321 LIST_INSERT_AFTER(curelm, elm, field);\ 322 }\ 323} while (0) 324 325#define KEY_CHKSASTATE(head, sav, name) \ 326do { \ 327 if ((head) != (sav)) { \ 328 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 329 (name), (head), (sav))); \ 330 continue; \ 331 } \ 332} while (0) 333 334#define KEY_CHKSPDIR(head, sp, name) \ 335do { \ 336 if ((head) != (sp)) { \ 337 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 338 "anyway continue.\n", \ 339 (name), (head), (sp))); \ 340 } \ 341} while (0) 342 343MALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association"); 344MALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head"); 345MALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy"); 346MALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request"); 347MALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous"); 348MALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire"); 349MALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire"); 350 351/* 352 * set parameters into secpolicyindex buffer. 353 * Must allocate secpolicyindex buffer passed to this function. 354 */ 355#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 356do { \ 357 bzero((idx), sizeof(struct secpolicyindex)); \ 358 (idx)->dir = (_dir); \ 359 (idx)->prefs = (ps); \ 360 (idx)->prefd = (pd); \ 361 (idx)->ul_proto = (ulp); \ 362 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 363 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 364} while (0) 365 366/* 367 * set parameters into secasindex buffer. 368 * Must allocate secasindex buffer before calling this function. 369 */ 370#define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 371do { \ 372 bzero((idx), sizeof(struct secasindex)); \ 373 (idx)->proto = (p); \ 374 (idx)->mode = (m); \ 375 (idx)->reqid = (r); \ 376 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 377 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 378} while (0) 379 380/* key statistics */ 381struct _keystat { 382 u_long getspi_count; /* the avarage of count to try to get new SPI */ 383} keystat; 384 385struct sadb_msghdr { 386 struct sadb_msg *msg; 387 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 388 int extoff[SADB_EXT_MAX + 1]; 389 int extlen[SADB_EXT_MAX + 1]; 390}; 391 392static struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 393static void key_freesp_so __P((struct secpolicy **)); 394static struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 395static void key_delsp __P((struct secpolicy *)); 396static struct secpolicy *key_getsp __P((struct secpolicyindex *)); 397static void _key_delsp(struct secpolicy *sp); 398static struct secpolicy *key_getspbyid __P((u_int32_t)); 399static u_int32_t key_newreqid __P((void)); 400static struct mbuf *key_gather_mbuf __P((struct mbuf *, 401 const struct sadb_msghdr *, int, int, ...)); 402static int key_spdadd __P((struct socket *, struct mbuf *, 403 const struct sadb_msghdr *)); 404static u_int32_t key_getnewspid __P((void)); 405static int key_spddelete __P((struct socket *, struct mbuf *, 406 const struct sadb_msghdr *)); 407static int key_spddelete2 __P((struct socket *, struct mbuf *, 408 const struct sadb_msghdr *)); 409static int key_spdget __P((struct socket *, struct mbuf *, 410 const struct sadb_msghdr *)); 411static int key_spdflush __P((struct socket *, struct mbuf *, 412 const struct sadb_msghdr *)); 413static int key_spddump __P((struct socket *, struct mbuf *, 414 const struct sadb_msghdr *)); 415static struct mbuf *key_setdumpsp __P((struct secpolicy *, 416 u_int8_t, u_int32_t, u_int32_t)); 417static u_int key_getspreqmsglen __P((struct secpolicy *)); 418static int key_spdexpire __P((struct secpolicy *)); 419static struct secashead *key_newsah __P((struct secasindex *)); 420static void key_delsah __P((struct secashead *)); 421static struct secasvar *key_newsav __P((struct mbuf *, 422 const struct sadb_msghdr *, struct secashead *, int *, 423 const char*, int)); 424#define KEY_NEWSAV(m, sadb, sah, e) \ 425 key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 426static void key_delsav __P((struct secasvar *)); 427static struct secashead *key_getsah __P((struct secasindex *)); 428static struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 429static struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 430static int key_setsaval __P((struct secasvar *, struct mbuf *, 431 const struct sadb_msghdr *)); 432static int key_mature __P((struct secasvar *)); 433static struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 434 u_int8_t, u_int32_t, u_int32_t)); 435static struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 436 u_int32_t, pid_t, u_int16_t)); 437static struct mbuf *key_setsadbsa __P((struct secasvar *)); 438static struct mbuf *key_setsadbaddr __P((u_int16_t, 439 const struct sockaddr *, u_int8_t, u_int16_t)); 440#ifdef IPSEC_NAT_T 441static struct mbuf *key_setsadbxport(u_int16_t, u_int16_t); 442static struct mbuf *key_setsadbxtype(u_int16_t); 443#endif 444static void key_porttosaddr(struct sockaddr *, u_int16_t); 445#define KEY_PORTTOSADDR(saddr, port) \ 446 key_porttosaddr((struct sockaddr *)(saddr), (port)) 447static struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); 448static struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 449 u_int32_t)); 450static struct seckey *key_dup_keymsg(const struct sadb_key *, u_int, 451 struct malloc_type *); 452static struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src, 453 struct malloc_type *type); 454#ifdef INET6 455static int key_ismyaddr6 __P((struct sockaddr_in6 *)); 456#endif 457 458/* flags for key_cmpsaidx() */ 459#define CMP_HEAD 1 /* protocol, addresses. */ 460#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 461#define CMP_REQID 3 /* additionally HEAD, reaid. */ 462#define CMP_EXACTLY 4 /* all elements. */ 463static int key_cmpsaidx 464 __P((const struct secasindex *, const struct secasindex *, int)); 465 466static int key_cmpspidx_exactly 467 __P((struct secpolicyindex *, struct secpolicyindex *)); 468static int key_cmpspidx_withmask 469 __P((struct secpolicyindex *, struct secpolicyindex *)); 470static int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 471static int key_bbcmp __P((const void *, const void *, u_int)); 472static u_int16_t key_satype2proto __P((u_int8_t)); 473static u_int8_t key_proto2satype __P((u_int16_t)); 474 475static int key_getspi __P((struct socket *, struct mbuf *, 476 const struct sadb_msghdr *)); 477static u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 478 struct secasindex *)); 479static int key_update __P((struct socket *, struct mbuf *, 480 const struct sadb_msghdr *)); 481#ifdef IPSEC_DOSEQCHECK 482static struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 483#endif 484static int key_add __P((struct socket *, struct mbuf *, 485 const struct sadb_msghdr *)); 486static int key_setident __P((struct secashead *, struct mbuf *, 487 const struct sadb_msghdr *)); 488static struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 489 const struct sadb_msghdr *)); 490static int key_delete __P((struct socket *, struct mbuf *, 491 const struct sadb_msghdr *)); 492static int key_get __P((struct socket *, struct mbuf *, 493 const struct sadb_msghdr *)); 494 495static void key_getcomb_setlifetime __P((struct sadb_comb *)); 496static struct mbuf *key_getcomb_esp __P((void)); 497static struct mbuf *key_getcomb_ah __P((void)); 498static struct mbuf *key_getcomb_ipcomp __P((void)); 499static struct mbuf *key_getprop __P((const struct secasindex *)); 500 501static int key_acquire __P((const struct secasindex *, struct secpolicy *)); 502static struct secacq *key_newacq __P((const struct secasindex *)); 503static struct secacq *key_getacq __P((const struct secasindex *)); 504static struct secacq *key_getacqbyseq __P((u_int32_t)); 505static struct secspacq *key_newspacq __P((struct secpolicyindex *)); 506static struct secspacq *key_getspacq __P((struct secpolicyindex *)); 507static int key_acquire2 __P((struct socket *, struct mbuf *, 508 const struct sadb_msghdr *)); 509static int key_register __P((struct socket *, struct mbuf *, 510 const struct sadb_msghdr *)); 511static int key_expire __P((struct secasvar *)); 512static int key_flush __P((struct socket *, struct mbuf *, 513 const struct sadb_msghdr *)); 514static int key_dump __P((struct socket *, struct mbuf *, 515 const struct sadb_msghdr *)); 516static int key_promisc __P((struct socket *, struct mbuf *, 517 const struct sadb_msghdr *)); 518static int key_senderror __P((struct socket *, struct mbuf *, int)); 519static int key_validate_ext __P((const struct sadb_ext *, int)); 520static int key_align __P((struct mbuf *, struct sadb_msghdr *)); 521static struct mbuf *key_setlifetime(struct seclifetime *src, 522 u_int16_t exttype); 523static struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype); 524 525#if 0 526static const char *key_getfqdn __P((void)); 527static const char *key_getuserfqdn __P((void)); 528#endif 529static void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 530static struct mbuf *key_alloc_mbuf __P((int)); 531 532static __inline void 533sa_initref(struct secasvar *sav) 534{ 535 536 refcount_init(&sav->refcnt, 1); 537} 538static __inline void 539sa_addref(struct secasvar *sav) 540{ 541 542 refcount_acquire(&sav->refcnt); 543 IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow")); 544} 545static __inline int 546sa_delref(struct secasvar *sav) 547{ 548 549 IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow")); 550 return (refcount_release(&sav->refcnt)); 551} 552 553#define SP_ADDREF(p) do { \ 554 (p)->refcnt++; \ 555 IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ 556} while (0) 557#define SP_DELREF(p) do { \ 558 IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ 559 (p)->refcnt--; \ 560} while (0) 561 562 563/* 564 * Update the refcnt while holding the SPTREE lock. 565 */ 566void 567key_addref(struct secpolicy *sp) 568{ 569 SPTREE_LOCK(); 570 SP_ADDREF(sp); 571 SPTREE_UNLOCK(); 572} 573 574/* 575 * Return 0 when there are known to be no SP's for the specified 576 * direction. Otherwise return 1. This is used by IPsec code 577 * to optimize performance. 578 */ 579int 580key_havesp(u_int dir) 581{ 582 INIT_VNET_IPSEC(curvnet); 583 584 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 585 LIST_FIRST(&V_sptree[dir]) != NULL : 1); 586} 587 588/* %%% IPsec policy management */ 589/* 590 * allocating a SP for OUTBOUND or INBOUND packet. 591 * Must call key_freesp() later. 592 * OUT: NULL: not found 593 * others: found and return the pointer. 594 */ 595struct secpolicy * 596key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 597{ 598 INIT_VNET_IPSEC(curvnet); 599 struct secpolicy *sp; 600 601 IPSEC_ASSERT(spidx != NULL, ("null spidx")); 602 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 603 ("invalid direction %u", dir)); 604 605 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 606 printf("DP %s from %s:%u\n", __func__, where, tag)); 607 608 /* get a SP entry */ 609 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 610 printf("*** objects\n"); 611 kdebug_secpolicyindex(spidx)); 612 613 SPTREE_LOCK(); 614 LIST_FOREACH(sp, &V_sptree[dir], chain) { 615 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 616 printf("*** in SPD\n"); 617 kdebug_secpolicyindex(&sp->spidx)); 618 619 if (sp->state == IPSEC_SPSTATE_DEAD) 620 continue; 621 if (key_cmpspidx_withmask(&sp->spidx, spidx)) 622 goto found; 623 } 624 sp = NULL; 625found: 626 if (sp) { 627 /* sanity check */ 628 KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 629 630 /* found a SPD entry */ 631 sp->lastused = time_second; 632 SP_ADDREF(sp); 633 } 634 SPTREE_UNLOCK(); 635 636 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 637 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 638 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 639 return sp; 640} 641 642/* 643 * allocating a SP for OUTBOUND or INBOUND packet. 644 * Must call key_freesp() later. 645 * OUT: NULL: not found 646 * others: found and return the pointer. 647 */ 648struct secpolicy * 649key_allocsp2(u_int32_t spi, 650 union sockaddr_union *dst, 651 u_int8_t proto, 652 u_int dir, 653 const char* where, int tag) 654{ 655 INIT_VNET_IPSEC(curvnet); 656 struct secpolicy *sp; 657 658 IPSEC_ASSERT(dst != NULL, ("null dst")); 659 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 660 ("invalid direction %u", dir)); 661 662 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 663 printf("DP %s from %s:%u\n", __func__, where, tag)); 664 665 /* get a SP entry */ 666 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 667 printf("*** objects\n"); 668 printf("spi %u proto %u dir %u\n", spi, proto, dir); 669 kdebug_sockaddr(&dst->sa)); 670 671 SPTREE_LOCK(); 672 LIST_FOREACH(sp, &V_sptree[dir], chain) { 673 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 674 printf("*** in SPD\n"); 675 kdebug_secpolicyindex(&sp->spidx)); 676 677 if (sp->state == IPSEC_SPSTATE_DEAD) 678 continue; 679 /* compare simple values, then dst address */ 680 if (sp->spidx.ul_proto != proto) 681 continue; 682 /* NB: spi's must exist and match */ 683 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 684 continue; 685 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 686 goto found; 687 } 688 sp = NULL; 689found: 690 if (sp) { 691 /* sanity check */ 692 KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 693 694 /* found a SPD entry */ 695 sp->lastused = time_second; 696 SP_ADDREF(sp); 697 } 698 SPTREE_UNLOCK(); 699 700 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 701 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 702 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 703 return sp; 704} 705 706#if 0 707/* 708 * return a policy that matches this particular inbound packet. 709 * XXX slow 710 */ 711struct secpolicy * 712key_gettunnel(const struct sockaddr *osrc, 713 const struct sockaddr *odst, 714 const struct sockaddr *isrc, 715 const struct sockaddr *idst, 716 const char* where, int tag) 717{ 718 INIT_VNET_IPSEC(curvnet); 719 struct secpolicy *sp; 720 const int dir = IPSEC_DIR_INBOUND; 721 struct ipsecrequest *r1, *r2, *p; 722 struct secpolicyindex spidx; 723 724 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 725 printf("DP %s from %s:%u\n", __func__, where, tag)); 726 727 if (isrc->sa_family != idst->sa_family) { 728 ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", 729 __func__, isrc->sa_family, idst->sa_family)); 730 sp = NULL; 731 goto done; 732 } 733 734 SPTREE_LOCK(); 735 LIST_FOREACH(sp, &V_sptree[dir], chain) { 736 if (sp->state == IPSEC_SPSTATE_DEAD) 737 continue; 738 739 r1 = r2 = NULL; 740 for (p = sp->req; p; p = p->next) { 741 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 742 continue; 743 744 r1 = r2; 745 r2 = p; 746 747 if (!r1) { 748 /* here we look at address matches only */ 749 spidx = sp->spidx; 750 if (isrc->sa_len > sizeof(spidx.src) || 751 idst->sa_len > sizeof(spidx.dst)) 752 continue; 753 bcopy(isrc, &spidx.src, isrc->sa_len); 754 bcopy(idst, &spidx.dst, idst->sa_len); 755 if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 756 continue; 757 } else { 758 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 759 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 760 continue; 761 } 762 763 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 764 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 765 continue; 766 767 goto found; 768 } 769 } 770 sp = NULL; 771found: 772 if (sp) { 773 sp->lastused = time_second; 774 SP_ADDREF(sp); 775 } 776 SPTREE_UNLOCK(); 777done: 778 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 779 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 780 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 781 return sp; 782} 783#endif 784 785/* 786 * allocating an SA entry for an *OUTBOUND* packet. 787 * checking each request entries in SP, and acquire an SA if need. 788 * OUT: 0: there are valid requests. 789 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 790 */ 791int 792key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 793{ 794 INIT_VNET_IPSEC(curvnet); 795 u_int level; 796 int error; 797 798 IPSEC_ASSERT(isr != NULL, ("null isr")); 799 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 800 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 801 saidx->mode == IPSEC_MODE_TUNNEL, 802 ("unexpected policy %u", saidx->mode)); 803 804 /* 805 * XXX guard against protocol callbacks from the crypto 806 * thread as they reference ipsecrequest.sav which we 807 * temporarily null out below. Need to rethink how we 808 * handle bundled SA's in the callback thread. 809 */ 810 IPSECREQUEST_LOCK_ASSERT(isr); 811 812 /* get current level */ 813 level = ipsec_get_reqlevel(isr); 814#if 0 815 /* 816 * We do allocate new SA only if the state of SA in the holder is 817 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 818 */ 819 if (isr->sav != NULL) { 820 if (isr->sav->sah == NULL) 821 panic("%s: sah is null.\n", __func__); 822 if (isr->sav == (struct secasvar *)LIST_FIRST( 823 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 824 KEY_FREESAV(&isr->sav); 825 isr->sav = NULL; 826 } 827 } 828#else 829 /* 830 * we free any SA stashed in the IPsec request because a different 831 * SA may be involved each time this request is checked, either 832 * because new SAs are being configured, or this request is 833 * associated with an unconnected datagram socket, or this request 834 * is associated with a system default policy. 835 * 836 * The operation may have negative impact to performance. We may 837 * want to check cached SA carefully, rather than picking new SA 838 * every time. 839 */ 840 if (isr->sav != NULL) { 841 KEY_FREESAV(&isr->sav); 842 isr->sav = NULL; 843 } 844#endif 845 846 /* 847 * new SA allocation if no SA found. 848 * key_allocsa_policy should allocate the oldest SA available. 849 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 850 */ 851 if (isr->sav == NULL) 852 isr->sav = key_allocsa_policy(saidx); 853 854 /* When there is SA. */ 855 if (isr->sav != NULL) { 856 if (isr->sav->state != SADB_SASTATE_MATURE && 857 isr->sav->state != SADB_SASTATE_DYING) 858 return EINVAL; 859 return 0; 860 } 861 862 /* there is no SA */ 863 error = key_acquire(saidx, isr->sp); 864 if (error != 0) { 865 /* XXX What should I do ? */ 866 ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 867 __func__, error)); 868 return error; 869 } 870 871 if (level != IPSEC_LEVEL_REQUIRE) { 872 /* XXX sigh, the interface to this routine is botched */ 873 IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); 874 return 0; 875 } else { 876 return ENOENT; 877 } 878} 879 880/* 881 * allocating a SA for policy entry from SAD. 882 * NOTE: searching SAD of aliving state. 883 * OUT: NULL: not found. 884 * others: found and return the pointer. 885 */ 886static struct secasvar * 887key_allocsa_policy(const struct secasindex *saidx) 888{ 889#define N(a) _ARRAYLEN(a) 890 INIT_VNET_IPSEC(curvnet); 891 struct secashead *sah; 892 struct secasvar *sav; 893 u_int stateidx, arraysize; 894 const u_int *state_valid; 895 896 SAHTREE_LOCK(); 897 LIST_FOREACH(sah, &V_sahtree, chain) { 898 if (sah->state == SADB_SASTATE_DEAD) 899 continue; 900 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { 901 if (V_key_preferred_oldsa) { 902 state_valid = saorder_state_valid_prefer_old; 903 arraysize = N(saorder_state_valid_prefer_old); 904 } else { 905 state_valid = saorder_state_valid_prefer_new; 906 arraysize = N(saorder_state_valid_prefer_new); 907 } 908 SAHTREE_UNLOCK(); 909 goto found; 910 } 911 } 912 SAHTREE_UNLOCK(); 913 914 return NULL; 915 916 found: 917 /* search valid state */ 918 for (stateidx = 0; stateidx < arraysize; stateidx++) { 919 sav = key_do_allocsa_policy(sah, state_valid[stateidx]); 920 if (sav != NULL) 921 return sav; 922 } 923 924 return NULL; 925#undef N 926} 927 928/* 929 * searching SAD with direction, protocol, mode and state. 930 * called by key_allocsa_policy(). 931 * OUT: 932 * NULL : not found 933 * others : found, pointer to a SA. 934 */ 935static struct secasvar * 936key_do_allocsa_policy(struct secashead *sah, u_int state) 937{ 938 INIT_VNET_IPSEC(curvnet); 939 struct secasvar *sav, *nextsav, *candidate, *d; 940 941 /* initilize */ 942 candidate = NULL; 943 944 SAHTREE_LOCK(); 945 for (sav = LIST_FIRST(&sah->savtree[state]); 946 sav != NULL; 947 sav = nextsav) { 948 949 nextsav = LIST_NEXT(sav, chain); 950 951 /* sanity check */ 952 KEY_CHKSASTATE(sav->state, state, __func__); 953 954 /* initialize */ 955 if (candidate == NULL) { 956 candidate = sav; 957 continue; 958 } 959 960 /* Which SA is the better ? */ 961 962 IPSEC_ASSERT(candidate->lft_c != NULL, 963 ("null candidate lifetime")); 964 IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime")); 965 966 /* What the best method is to compare ? */ 967 if (V_key_preferred_oldsa) { 968 if (candidate->lft_c->addtime > 969 sav->lft_c->addtime) { 970 candidate = sav; 971 } 972 continue; 973 /*NOTREACHED*/ 974 } 975 976 /* preferred new sa rather than old sa */ 977 if (candidate->lft_c->addtime < 978 sav->lft_c->addtime) { 979 d = candidate; 980 candidate = sav; 981 } else 982 d = sav; 983 984 /* 985 * prepared to delete the SA when there is more 986 * suitable candidate and the lifetime of the SA is not 987 * permanent. 988 */ 989 if (d->lft_h->addtime != 0) { 990 struct mbuf *m, *result; 991 u_int8_t satype; 992 993 key_sa_chgstate(d, SADB_SASTATE_DEAD); 994 995 IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count")); 996 997 satype = key_proto2satype(d->sah->saidx.proto); 998 if (satype == 0) 999 goto msgfail; 1000 1001 m = key_setsadbmsg(SADB_DELETE, 0, 1002 satype, 0, 0, d->refcnt - 1); 1003 if (!m) 1004 goto msgfail; 1005 result = m; 1006 1007 /* set sadb_address for saidx's. */ 1008 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1009 &d->sah->saidx.src.sa, 1010 d->sah->saidx.src.sa.sa_len << 3, 1011 IPSEC_ULPROTO_ANY); 1012 if (!m) 1013 goto msgfail; 1014 m_cat(result, m); 1015 1016 /* set sadb_address for saidx's. */ 1017 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1018 &d->sah->saidx.dst.sa, 1019 d->sah->saidx.dst.sa.sa_len << 3, 1020 IPSEC_ULPROTO_ANY); 1021 if (!m) 1022 goto msgfail; 1023 m_cat(result, m); 1024 1025 /* create SA extension */ 1026 m = key_setsadbsa(d); 1027 if (!m) 1028 goto msgfail; 1029 m_cat(result, m); 1030 1031 if (result->m_len < sizeof(struct sadb_msg)) { 1032 result = m_pullup(result, 1033 sizeof(struct sadb_msg)); 1034 if (result == NULL) 1035 goto msgfail; 1036 } 1037 1038 result->m_pkthdr.len = 0; 1039 for (m = result; m; m = m->m_next) 1040 result->m_pkthdr.len += m->m_len; 1041 mtod(result, struct sadb_msg *)->sadb_msg_len = 1042 PFKEY_UNIT64(result->m_pkthdr.len); 1043 1044 if (key_sendup_mbuf(NULL, result, 1045 KEY_SENDUP_REGISTERED)) 1046 goto msgfail; 1047 msgfail: 1048 KEY_FREESAV(&d); 1049 } 1050 } 1051 if (candidate) { 1052 sa_addref(candidate); 1053 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1054 printf("DP %s cause refcnt++:%d SA:%p\n", 1055 __func__, candidate->refcnt, candidate)); 1056 } 1057 SAHTREE_UNLOCK(); 1058 1059 return candidate; 1060} 1061 1062/* 1063 * allocating a usable SA entry for a *INBOUND* packet. 1064 * Must call key_freesav() later. 1065 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1066 * NULL: not found, or error occured. 1067 * 1068 * In the comparison, no source address is used--for RFC2401 conformance. 1069 * To quote, from section 4.1: 1070 * A security association is uniquely identified by a triple consisting 1071 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1072 * security protocol (AH or ESP) identifier. 1073 * Note that, however, we do need to keep source address in IPsec SA. 1074 * IKE specification and PF_KEY specification do assume that we 1075 * keep source address in IPsec SA. We see a tricky situation here. 1076 */ 1077struct secasvar * 1078key_allocsa( 1079 union sockaddr_union *dst, 1080 u_int proto, 1081 u_int32_t spi, 1082 const char* where, int tag) 1083{ 1084 INIT_VNET_IPSEC(curvnet); 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 INIT_VNET_IPSEC(curvnet); 1164 struct secpolicy *sp = *spp; 1165 1166 IPSEC_ASSERT(sp != NULL, ("null sp")); 1167 1168 SPTREE_LOCK(); 1169 SP_DELREF(sp); 1170 1171 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1172 printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1173 __func__, sp, sp->id, where, tag, sp->refcnt)); 1174 1175 if (sp->refcnt == 0) { 1176 *spp = NULL; 1177 key_delsp(sp); 1178 } 1179 SPTREE_UNLOCK(); 1180} 1181 1182/* 1183 * Must be called after calling key_allocsp(). 1184 * For the packet with socket. 1185 */ 1186void 1187key_freeso(struct socket *so) 1188{ 1189 INIT_VNET_IPSEC(curvnet); 1190 IPSEC_ASSERT(so != NULL, ("null so")); 1191 1192 switch (so->so_proto->pr_domain->dom_family) { 1193#if defined(INET) || defined(INET6) 1194#ifdef INET 1195 case PF_INET: 1196#endif 1197#ifdef INET6 1198 case PF_INET6: 1199#endif 1200 { 1201 struct inpcb *pcb = sotoinpcb(so); 1202 1203 /* Does it have a PCB ? */ 1204 if (pcb == NULL) 1205 return; 1206 key_freesp_so(&pcb->inp_sp->sp_in); 1207 key_freesp_so(&pcb->inp_sp->sp_out); 1208 } 1209 break; 1210#endif /* INET || INET6 */ 1211 default: 1212 ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n", 1213 __func__, so->so_proto->pr_domain->dom_family)); 1214 return; 1215 } 1216} 1217 1218static void 1219key_freesp_so(struct secpolicy **sp) 1220{ 1221 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp")); 1222 1223 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1224 (*sp)->policy == IPSEC_POLICY_BYPASS) 1225 return; 1226 1227 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1228 ("invalid policy %u", (*sp)->policy)); 1229 KEY_FREESP(sp); 1230} 1231 1232/* 1233 * Must be called after calling key_allocsa(). 1234 * This function is called by key_freesp() to free some SA allocated 1235 * for a policy. 1236 */ 1237void 1238key_freesav(struct secasvar **psav, const char* where, int tag) 1239{ 1240 INIT_VNET_IPSEC(curvnet); 1241 struct secasvar *sav = *psav; 1242 1243 IPSEC_ASSERT(sav != NULL, ("null sav")); 1244 1245 if (sa_delref(sav)) { 1246 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1247 printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1248 __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1249 *psav = NULL; 1250 key_delsav(sav); 1251 } else { 1252 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1253 printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1254 __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1255 } 1256} 1257 1258/* %%% SPD management */ 1259/* 1260 * free security policy entry. 1261 */ 1262static void 1263key_delsp(struct secpolicy *sp) 1264{ 1265 struct ipsecrequest *isr, *nextisr; 1266 1267 IPSEC_ASSERT(sp != NULL, ("null sp")); 1268 SPTREE_LOCK_ASSERT(); 1269 1270 sp->state = IPSEC_SPSTATE_DEAD; 1271 1272 IPSEC_ASSERT(sp->refcnt == 0, 1273 ("SP with references deleted (refcnt %u)", sp->refcnt)); 1274 1275 /* remove from SP index */ 1276 if (__LIST_CHAINED(sp)) 1277 LIST_REMOVE(sp, chain); 1278 1279 for (isr = sp->req; isr != NULL; isr = nextisr) { 1280 if (isr->sav != NULL) { 1281 KEY_FREESAV(&isr->sav); 1282 isr->sav = NULL; 1283 } 1284 1285 nextisr = isr->next; 1286 ipsec_delisr(isr); 1287 } 1288 _key_delsp(sp); 1289} 1290 1291/* 1292 * search SPD 1293 * OUT: NULL : not found 1294 * others : found, pointer to a SP. 1295 */ 1296static struct secpolicy * 1297key_getsp(struct secpolicyindex *spidx) 1298{ 1299 INIT_VNET_IPSEC(curvnet); 1300 struct secpolicy *sp; 1301 1302 IPSEC_ASSERT(spidx != NULL, ("null spidx")); 1303 1304 SPTREE_LOCK(); 1305 LIST_FOREACH(sp, &V_sptree[spidx->dir], chain) { 1306 if (sp->state == IPSEC_SPSTATE_DEAD) 1307 continue; 1308 if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1309 SP_ADDREF(sp); 1310 break; 1311 } 1312 } 1313 SPTREE_UNLOCK(); 1314 1315 return sp; 1316} 1317 1318/* 1319 * get SP by index. 1320 * OUT: NULL : not found 1321 * others : found, pointer to a SP. 1322 */ 1323static struct secpolicy * 1324key_getspbyid(u_int32_t id) 1325{ 1326 INIT_VNET_IPSEC(curvnet); 1327 struct secpolicy *sp; 1328 1329 SPTREE_LOCK(); 1330 LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) { 1331 if (sp->state == IPSEC_SPSTATE_DEAD) 1332 continue; 1333 if (sp->id == id) { 1334 SP_ADDREF(sp); 1335 goto done; 1336 } 1337 } 1338 1339 LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) { 1340 if (sp->state == IPSEC_SPSTATE_DEAD) 1341 continue; 1342 if (sp->id == id) { 1343 SP_ADDREF(sp); 1344 goto done; 1345 } 1346 } 1347done: 1348 SPTREE_UNLOCK(); 1349 1350 return sp; 1351} 1352 1353struct secpolicy * 1354key_newsp(const char* where, int tag) 1355{ 1356 INIT_VNET_IPSEC(curvnet); 1357 struct secpolicy *newsp = NULL; 1358 1359 newsp = (struct secpolicy *) 1360 malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO); 1361 if (newsp) { 1362 SECPOLICY_LOCK_INIT(newsp); 1363 newsp->refcnt = 1; 1364 newsp->req = NULL; 1365 } 1366 1367 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1368 printf("DP %s from %s:%u return SP:%p\n", __func__, 1369 where, tag, newsp)); 1370 return newsp; 1371} 1372 1373static void 1374_key_delsp(struct secpolicy *sp) 1375{ 1376 SECPOLICY_LOCK_DESTROY(sp); 1377 free(sp, M_IPSEC_SP); 1378} 1379 1380/* 1381 * create secpolicy structure from sadb_x_policy structure. 1382 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1383 * so must be set properly later. 1384 */ 1385struct secpolicy * 1386key_msg2sp(xpl0, len, error) 1387 struct sadb_x_policy *xpl0; 1388 size_t len; 1389 int *error; 1390{ 1391 INIT_VNET_IPSEC(curvnet); 1392 struct secpolicy *newsp; 1393 1394 IPSEC_ASSERT(xpl0 != NULL, ("null xpl0")); 1395 IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len)); 1396 1397 if (len != PFKEY_EXTLEN(xpl0)) { 1398 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__)); 1399 *error = EINVAL; 1400 return NULL; 1401 } 1402 1403 if ((newsp = KEY_NEWSP()) == NULL) { 1404 *error = ENOBUFS; 1405 return NULL; 1406 } 1407 1408 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1409 newsp->policy = xpl0->sadb_x_policy_type; 1410 1411 /* check policy */ 1412 switch (xpl0->sadb_x_policy_type) { 1413 case IPSEC_POLICY_DISCARD: 1414 case IPSEC_POLICY_NONE: 1415 case IPSEC_POLICY_ENTRUST: 1416 case IPSEC_POLICY_BYPASS: 1417 newsp->req = NULL; 1418 break; 1419 1420 case IPSEC_POLICY_IPSEC: 1421 { 1422 int tlen; 1423 struct sadb_x_ipsecrequest *xisr; 1424 struct ipsecrequest **p_isr = &newsp->req; 1425 1426 /* validity check */ 1427 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1428 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", 1429 __func__)); 1430 KEY_FREESP(&newsp); 1431 *error = EINVAL; 1432 return NULL; 1433 } 1434 1435 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1436 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1437 1438 while (tlen > 0) { 1439 /* length check */ 1440 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1441 ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest " 1442 "length.\n", __func__)); 1443 KEY_FREESP(&newsp); 1444 *error = EINVAL; 1445 return NULL; 1446 } 1447 1448 /* allocate request buffer */ 1449 /* NB: data structure is zero'd */ 1450 *p_isr = ipsec_newisr(); 1451 if ((*p_isr) == NULL) { 1452 ipseclog((LOG_DEBUG, 1453 "%s: No more memory.\n", __func__)); 1454 KEY_FREESP(&newsp); 1455 *error = ENOBUFS; 1456 return NULL; 1457 } 1458 1459 /* set values */ 1460 switch (xisr->sadb_x_ipsecrequest_proto) { 1461 case IPPROTO_ESP: 1462 case IPPROTO_AH: 1463 case IPPROTO_IPCOMP: 1464 break; 1465 default: 1466 ipseclog((LOG_DEBUG, 1467 "%s: invalid proto type=%u\n", __func__, 1468 xisr->sadb_x_ipsecrequest_proto)); 1469 KEY_FREESP(&newsp); 1470 *error = EPROTONOSUPPORT; 1471 return NULL; 1472 } 1473 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1474 1475 switch (xisr->sadb_x_ipsecrequest_mode) { 1476 case IPSEC_MODE_TRANSPORT: 1477 case IPSEC_MODE_TUNNEL: 1478 break; 1479 case IPSEC_MODE_ANY: 1480 default: 1481 ipseclog((LOG_DEBUG, 1482 "%s: invalid mode=%u\n", __func__, 1483 xisr->sadb_x_ipsecrequest_mode)); 1484 KEY_FREESP(&newsp); 1485 *error = EINVAL; 1486 return NULL; 1487 } 1488 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1489 1490 switch (xisr->sadb_x_ipsecrequest_level) { 1491 case IPSEC_LEVEL_DEFAULT: 1492 case IPSEC_LEVEL_USE: 1493 case IPSEC_LEVEL_REQUIRE: 1494 break; 1495 case IPSEC_LEVEL_UNIQUE: 1496 /* validity check */ 1497 /* 1498 * If range violation of reqid, kernel will 1499 * update it, don't refuse it. 1500 */ 1501 if (xisr->sadb_x_ipsecrequest_reqid 1502 > IPSEC_MANUAL_REQID_MAX) { 1503 ipseclog((LOG_DEBUG, 1504 "%s: reqid=%d range " 1505 "violation, updated by kernel.\n", 1506 __func__, 1507 xisr->sadb_x_ipsecrequest_reqid)); 1508 xisr->sadb_x_ipsecrequest_reqid = 0; 1509 } 1510 1511 /* allocate new reqid id if reqid is zero. */ 1512 if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1513 u_int32_t reqid; 1514 if ((reqid = key_newreqid()) == 0) { 1515 KEY_FREESP(&newsp); 1516 *error = ENOBUFS; 1517 return NULL; 1518 } 1519 (*p_isr)->saidx.reqid = reqid; 1520 xisr->sadb_x_ipsecrequest_reqid = reqid; 1521 } else { 1522 /* set it for manual keying. */ 1523 (*p_isr)->saidx.reqid = 1524 xisr->sadb_x_ipsecrequest_reqid; 1525 } 1526 break; 1527 1528 default: 1529 ipseclog((LOG_DEBUG, "%s: invalid level=%u\n", 1530 __func__, 1531 xisr->sadb_x_ipsecrequest_level)); 1532 KEY_FREESP(&newsp); 1533 *error = EINVAL; 1534 return NULL; 1535 } 1536 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1537 1538 /* set IP addresses if there */ 1539 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1540 struct sockaddr *paddr; 1541 1542 paddr = (struct sockaddr *)(xisr + 1); 1543 1544 /* validity check */ 1545 if (paddr->sa_len 1546 > sizeof((*p_isr)->saidx.src)) { 1547 ipseclog((LOG_DEBUG, "%s: invalid " 1548 "request address length.\n", 1549 __func__)); 1550 KEY_FREESP(&newsp); 1551 *error = EINVAL; 1552 return NULL; 1553 } 1554 bcopy(paddr, &(*p_isr)->saidx.src, 1555 paddr->sa_len); 1556 1557 paddr = (struct sockaddr *)((caddr_t)paddr 1558 + paddr->sa_len); 1559 1560 /* validity check */ 1561 if (paddr->sa_len 1562 > sizeof((*p_isr)->saidx.dst)) { 1563 ipseclog((LOG_DEBUG, "%s: invalid " 1564 "request address length.\n", 1565 __func__)); 1566 KEY_FREESP(&newsp); 1567 *error = EINVAL; 1568 return NULL; 1569 } 1570 bcopy(paddr, &(*p_isr)->saidx.dst, 1571 paddr->sa_len); 1572 } 1573 1574 (*p_isr)->sp = newsp; 1575 1576 /* initialization for the next. */ 1577 p_isr = &(*p_isr)->next; 1578 tlen -= xisr->sadb_x_ipsecrequest_len; 1579 1580 /* validity check */ 1581 if (tlen < 0) { 1582 ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n", 1583 __func__)); 1584 KEY_FREESP(&newsp); 1585 *error = EINVAL; 1586 return NULL; 1587 } 1588 1589 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr 1590 + xisr->sadb_x_ipsecrequest_len); 1591 } 1592 } 1593 break; 1594 default: 1595 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); 1596 KEY_FREESP(&newsp); 1597 *error = EINVAL; 1598 return NULL; 1599 } 1600 1601 *error = 0; 1602 return newsp; 1603} 1604 1605static u_int32_t 1606key_newreqid() 1607{ 1608 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1609 1610 auto_reqid = (auto_reqid == ~0 1611 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1612 1613 /* XXX should be unique check */ 1614 1615 return auto_reqid; 1616} 1617 1618/* 1619 * copy secpolicy struct to sadb_x_policy structure indicated. 1620 */ 1621struct mbuf * 1622key_sp2msg(sp) 1623 struct secpolicy *sp; 1624{ 1625 struct sadb_x_policy *xpl; 1626 int tlen; 1627 caddr_t p; 1628 struct mbuf *m; 1629 1630 IPSEC_ASSERT(sp != NULL, ("null policy")); 1631 1632 tlen = key_getspreqmsglen(sp); 1633 1634 m = key_alloc_mbuf(tlen); 1635 if (!m || m->m_next) { /*XXX*/ 1636 if (m) 1637 m_freem(m); 1638 return NULL; 1639 } 1640 1641 m->m_len = tlen; 1642 m->m_next = NULL; 1643 xpl = mtod(m, struct sadb_x_policy *); 1644 bzero(xpl, tlen); 1645 1646 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1647 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1648 xpl->sadb_x_policy_type = sp->policy; 1649 xpl->sadb_x_policy_dir = sp->spidx.dir; 1650 xpl->sadb_x_policy_id = sp->id; 1651 p = (caddr_t)xpl + sizeof(*xpl); 1652 1653 /* if is the policy for ipsec ? */ 1654 if (sp->policy == IPSEC_POLICY_IPSEC) { 1655 struct sadb_x_ipsecrequest *xisr; 1656 struct ipsecrequest *isr; 1657 1658 for (isr = sp->req; isr != NULL; isr = isr->next) { 1659 1660 xisr = (struct sadb_x_ipsecrequest *)p; 1661 1662 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1663 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1664 xisr->sadb_x_ipsecrequest_level = isr->level; 1665 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1666 1667 p += sizeof(*xisr); 1668 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1669 p += isr->saidx.src.sa.sa_len; 1670 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1671 p += isr->saidx.src.sa.sa_len; 1672 1673 xisr->sadb_x_ipsecrequest_len = 1674 PFKEY_ALIGN8(sizeof(*xisr) 1675 + isr->saidx.src.sa.sa_len 1676 + isr->saidx.dst.sa.sa_len); 1677 } 1678 } 1679 1680 return m; 1681} 1682 1683/* m will not be freed nor modified */ 1684static struct mbuf * 1685#ifdef __STDC__ 1686key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1687 int ndeep, int nitem, ...) 1688#else 1689key_gather_mbuf(m, mhp, ndeep, nitem, va_alist) 1690 struct mbuf *m; 1691 const struct sadb_msghdr *mhp; 1692 int ndeep; 1693 int nitem; 1694 va_dcl 1695#endif 1696{ 1697 va_list ap; 1698 int idx; 1699 int i; 1700 struct mbuf *result = NULL, *n; 1701 int len; 1702 1703 IPSEC_ASSERT(m != NULL, ("null mbuf")); 1704 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1705 1706 va_start(ap, nitem); 1707 for (i = 0; i < nitem; i++) { 1708 idx = va_arg(ap, int); 1709 if (idx < 0 || idx > SADB_EXT_MAX) 1710 goto fail; 1711 /* don't attempt to pull empty extension */ 1712 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1713 continue; 1714 if (idx != SADB_EXT_RESERVED && 1715 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1716 continue; 1717 1718 if (idx == SADB_EXT_RESERVED) { 1719 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1720 1721 IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len)); 1722 1723 MGETHDR(n, M_DONTWAIT, MT_DATA); 1724 if (!n) 1725 goto fail; 1726 n->m_len = len; 1727 n->m_next = NULL; 1728 m_copydata(m, 0, sizeof(struct sadb_msg), 1729 mtod(n, caddr_t)); 1730 } else if (i < ndeep) { 1731 len = mhp->extlen[idx]; 1732 n = key_alloc_mbuf(len); 1733 if (!n || n->m_next) { /*XXX*/ 1734 if (n) 1735 m_freem(n); 1736 goto fail; 1737 } 1738 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1739 mtod(n, caddr_t)); 1740 } else { 1741 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1742 M_DONTWAIT); 1743 } 1744 if (n == NULL) 1745 goto fail; 1746 1747 if (result) 1748 m_cat(result, n); 1749 else 1750 result = n; 1751 } 1752 va_end(ap); 1753 1754 if ((result->m_flags & M_PKTHDR) != 0) { 1755 result->m_pkthdr.len = 0; 1756 for (n = result; n; n = n->m_next) 1757 result->m_pkthdr.len += n->m_len; 1758 } 1759 1760 return result; 1761 1762fail: 1763 m_freem(result); 1764 return NULL; 1765} 1766 1767/* 1768 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1769 * add an entry to SP database, when received 1770 * <base, address(SD), (lifetime(H),) policy> 1771 * from the user(?). 1772 * Adding to SP database, 1773 * and send 1774 * <base, address(SD), (lifetime(H),) policy> 1775 * to the socket which was send. 1776 * 1777 * SPDADD set a unique policy entry. 1778 * SPDSETIDX like SPDADD without a part of policy requests. 1779 * SPDUPDATE replace a unique policy entry. 1780 * 1781 * m will always be freed. 1782 */ 1783static int 1784key_spdadd(so, m, mhp) 1785 struct socket *so; 1786 struct mbuf *m; 1787 const struct sadb_msghdr *mhp; 1788{ 1789 INIT_VNET_IPSEC(curvnet); 1790 struct sadb_address *src0, *dst0; 1791 struct sadb_x_policy *xpl0, *xpl; 1792 struct sadb_lifetime *lft = NULL; 1793 struct secpolicyindex spidx; 1794 struct secpolicy *newsp; 1795 int error; 1796 1797 IPSEC_ASSERT(so != NULL, ("null socket")); 1798 IPSEC_ASSERT(m != NULL, ("null mbuf")); 1799 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1800 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 1801 1802 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1803 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1804 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1805 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1806 return key_senderror(so, m, EINVAL); 1807 } 1808 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1809 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1810 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1811 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1812 __func__)); 1813 return key_senderror(so, m, EINVAL); 1814 } 1815 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1816 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1817 < sizeof(struct sadb_lifetime)) { 1818 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1819 __func__)); 1820 return key_senderror(so, m, EINVAL); 1821 } 1822 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1823 } 1824 1825 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1826 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1827 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1828 1829 /* 1830 * Note: do not parse SADB_X_EXT_NAT_T_* here: 1831 * we are processing traffic endpoints. 1832 */ 1833 1834 /* make secindex */ 1835 /* XXX boundary check against sa_len */ 1836 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1837 src0 + 1, 1838 dst0 + 1, 1839 src0->sadb_address_prefixlen, 1840 dst0->sadb_address_prefixlen, 1841 src0->sadb_address_proto, 1842 &spidx); 1843 1844 /* checking the direciton. */ 1845 switch (xpl0->sadb_x_policy_dir) { 1846 case IPSEC_DIR_INBOUND: 1847 case IPSEC_DIR_OUTBOUND: 1848 break; 1849 default: 1850 ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 1851 mhp->msg->sadb_msg_errno = EINVAL; 1852 return 0; 1853 } 1854 1855 /* check policy */ 1856 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1857 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1858 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1859 ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__)); 1860 return key_senderror(so, m, EINVAL); 1861 } 1862 1863 /* policy requests are mandatory when action is ipsec. */ 1864 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1865 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1866 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1867 ipseclog((LOG_DEBUG, "%s: some policy requests part required\n", 1868 __func__)); 1869 return key_senderror(so, m, EINVAL); 1870 } 1871 1872 /* 1873 * checking there is SP already or not. 1874 * SPDUPDATE doesn't depend on whether there is a SP or not. 1875 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1876 * then error. 1877 */ 1878 newsp = key_getsp(&spidx); 1879 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1880 if (newsp) { 1881 newsp->state = IPSEC_SPSTATE_DEAD; 1882 KEY_FREESP(&newsp); 1883 } 1884 } else { 1885 if (newsp != NULL) { 1886 KEY_FREESP(&newsp); 1887 ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", 1888 __func__)); 1889 return key_senderror(so, m, EEXIST); 1890 } 1891 } 1892 1893 /* allocation new SP entry */ 1894 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1895 return key_senderror(so, m, error); 1896 } 1897 1898 if ((newsp->id = key_getnewspid()) == 0) { 1899 _key_delsp(newsp); 1900 return key_senderror(so, m, ENOBUFS); 1901 } 1902 1903 /* XXX boundary check against sa_len */ 1904 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1905 src0 + 1, 1906 dst0 + 1, 1907 src0->sadb_address_prefixlen, 1908 dst0->sadb_address_prefixlen, 1909 src0->sadb_address_proto, 1910 &newsp->spidx); 1911 1912 /* sanity check on addr pair */ 1913 if (((struct sockaddr *)(src0 + 1))->sa_family != 1914 ((struct sockaddr *)(dst0+ 1))->sa_family) { 1915 _key_delsp(newsp); 1916 return key_senderror(so, m, EINVAL); 1917 } 1918 if (((struct sockaddr *)(src0 + 1))->sa_len != 1919 ((struct sockaddr *)(dst0+ 1))->sa_len) { 1920 _key_delsp(newsp); 1921 return key_senderror(so, m, EINVAL); 1922 } 1923#if 1 1924 if (newsp->req && newsp->req->saidx.src.sa.sa_family) { 1925 struct sockaddr *sa; 1926 sa = (struct sockaddr *)(src0 + 1); 1927 if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) { 1928 _key_delsp(newsp); 1929 return key_senderror(so, m, EINVAL); 1930 } 1931 } 1932 if (newsp->req && newsp->req->saidx.dst.sa.sa_family) { 1933 struct sockaddr *sa; 1934 sa = (struct sockaddr *)(dst0 + 1); 1935 if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) { 1936 _key_delsp(newsp); 1937 return key_senderror(so, m, EINVAL); 1938 } 1939 } 1940#endif 1941 1942 newsp->created = time_second; 1943 newsp->lastused = newsp->created; 1944 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1945 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1946 1947 newsp->refcnt = 1; /* do not reclaim until I say I do */ 1948 newsp->state = IPSEC_SPSTATE_ALIVE; 1949 LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1950 1951 /* delete the entry in spacqtree */ 1952 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1953 struct secspacq *spacq = key_getspacq(&spidx); 1954 if (spacq != NULL) { 1955 /* reset counter in order to deletion by timehandler. */ 1956 spacq->created = time_second; 1957 spacq->count = 0; 1958 SPACQ_UNLOCK(); 1959 } 1960 } 1961 1962 { 1963 struct mbuf *n, *mpolicy; 1964 struct sadb_msg *newmsg; 1965 int off; 1966 1967 /* 1968 * Note: do not send SADB_X_EXT_NAT_T_* here: 1969 * we are sending traffic endpoints. 1970 */ 1971 1972 /* create new sadb_msg to reply. */ 1973 if (lft) { 1974 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1975 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1976 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1977 } else { 1978 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1979 SADB_X_EXT_POLICY, 1980 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1981 } 1982 if (!n) 1983 return key_senderror(so, m, ENOBUFS); 1984 1985 if (n->m_len < sizeof(*newmsg)) { 1986 n = m_pullup(n, sizeof(*newmsg)); 1987 if (!n) 1988 return key_senderror(so, m, ENOBUFS); 1989 } 1990 newmsg = mtod(n, struct sadb_msg *); 1991 newmsg->sadb_msg_errno = 0; 1992 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1993 1994 off = 0; 1995 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1996 sizeof(*xpl), &off); 1997 if (mpolicy == NULL) { 1998 /* n is already freed */ 1999 return key_senderror(so, m, ENOBUFS); 2000 } 2001 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 2002 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2003 m_freem(n); 2004 return key_senderror(so, m, EINVAL); 2005 } 2006 xpl->sadb_x_policy_id = newsp->id; 2007 2008 m_freem(m); 2009 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2010 } 2011} 2012 2013/* 2014 * get new policy id. 2015 * OUT: 2016 * 0: failure. 2017 * others: success. 2018 */ 2019static u_int32_t 2020key_getnewspid() 2021{ 2022 INIT_VNET_IPSEC(curvnet); 2023 u_int32_t newid = 0; 2024 int count = V_key_spi_trycnt; /* XXX */ 2025 struct secpolicy *sp; 2026 2027 /* when requesting to allocate spi ranged */ 2028 while (count--) { 2029 newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1)); 2030 2031 if ((sp = key_getspbyid(newid)) == NULL) 2032 break; 2033 2034 KEY_FREESP(&sp); 2035 } 2036 2037 if (count == 0 || newid == 0) { 2038 ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", 2039 __func__)); 2040 return 0; 2041 } 2042 2043 return newid; 2044} 2045 2046/* 2047 * SADB_SPDDELETE processing 2048 * receive 2049 * <base, address(SD), policy(*)> 2050 * from the user(?), and set SADB_SASTATE_DEAD, 2051 * and send, 2052 * <base, address(SD), policy(*)> 2053 * to the ikmpd. 2054 * policy(*) including direction of policy. 2055 * 2056 * m will always be freed. 2057 */ 2058static int 2059key_spddelete(so, m, mhp) 2060 struct socket *so; 2061 struct mbuf *m; 2062 const struct sadb_msghdr *mhp; 2063{ 2064 INIT_VNET_IPSEC(curvnet); 2065 struct sadb_address *src0, *dst0; 2066 struct sadb_x_policy *xpl0; 2067 struct secpolicyindex spidx; 2068 struct secpolicy *sp; 2069 2070 IPSEC_ASSERT(so != NULL, ("null so")); 2071 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2072 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2073 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2074 2075 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2076 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2077 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2078 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2079 __func__)); 2080 return key_senderror(so, m, EINVAL); 2081 } 2082 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2083 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2084 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2085 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2086 __func__)); 2087 return key_senderror(so, m, EINVAL); 2088 } 2089 2090 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2091 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2092 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2093 2094 /* 2095 * Note: do not parse SADB_X_EXT_NAT_T_* here: 2096 * we are processing traffic endpoints. 2097 */ 2098 2099 /* make secindex */ 2100 /* XXX boundary check against sa_len */ 2101 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2102 src0 + 1, 2103 dst0 + 1, 2104 src0->sadb_address_prefixlen, 2105 dst0->sadb_address_prefixlen, 2106 src0->sadb_address_proto, 2107 &spidx); 2108 2109 /* checking the direciton. */ 2110 switch (xpl0->sadb_x_policy_dir) { 2111 case IPSEC_DIR_INBOUND: 2112 case IPSEC_DIR_OUTBOUND: 2113 break; 2114 default: 2115 ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 2116 return key_senderror(so, m, EINVAL); 2117 } 2118 2119 /* Is there SP in SPD ? */ 2120 if ((sp = key_getsp(&spidx)) == NULL) { 2121 ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); 2122 return key_senderror(so, m, EINVAL); 2123 } 2124 2125 /* save policy id to buffer to be returned. */ 2126 xpl0->sadb_x_policy_id = sp->id; 2127 2128 sp->state = IPSEC_SPSTATE_DEAD; 2129 KEY_FREESP(&sp); 2130 2131 { 2132 struct mbuf *n; 2133 struct sadb_msg *newmsg; 2134 2135 /* 2136 * Note: do not send SADB_X_EXT_NAT_T_* here: 2137 * we are sending traffic endpoints. 2138 */ 2139 2140 /* create new sadb_msg to reply. */ 2141 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2142 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2143 if (!n) 2144 return key_senderror(so, m, ENOBUFS); 2145 2146 newmsg = mtod(n, struct sadb_msg *); 2147 newmsg->sadb_msg_errno = 0; 2148 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2149 2150 m_freem(m); 2151 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2152 } 2153} 2154 2155/* 2156 * SADB_SPDDELETE2 processing 2157 * receive 2158 * <base, policy(*)> 2159 * from the user(?), and set SADB_SASTATE_DEAD, 2160 * and send, 2161 * <base, policy(*)> 2162 * to the ikmpd. 2163 * policy(*) including direction of policy. 2164 * 2165 * m will always be freed. 2166 */ 2167static int 2168key_spddelete2(so, m, mhp) 2169 struct socket *so; 2170 struct mbuf *m; 2171 const struct sadb_msghdr *mhp; 2172{ 2173 INIT_VNET_IPSEC(curvnet); 2174 u_int32_t id; 2175 struct secpolicy *sp; 2176 2177 IPSEC_ASSERT(so != NULL, ("null socket")); 2178 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2179 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2180 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2181 2182 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2183 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2184 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); 2185 return key_senderror(so, m, EINVAL); 2186 } 2187 2188 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2189 2190 /* Is there SP in SPD ? */ 2191 if ((sp = key_getspbyid(id)) == NULL) { 2192 ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2193 return key_senderror(so, m, EINVAL); 2194 } 2195 2196 sp->state = IPSEC_SPSTATE_DEAD; 2197 KEY_FREESP(&sp); 2198 2199 { 2200 struct mbuf *n, *nn; 2201 struct sadb_msg *newmsg; 2202 int off, len; 2203 2204 /* create new sadb_msg to reply. */ 2205 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2206 2207 MGETHDR(n, M_DONTWAIT, MT_DATA); 2208 if (n && len > MHLEN) { 2209 MCLGET(n, M_DONTWAIT); 2210 if ((n->m_flags & M_EXT) == 0) { 2211 m_freem(n); 2212 n = NULL; 2213 } 2214 } 2215 if (!n) 2216 return key_senderror(so, m, ENOBUFS); 2217 2218 n->m_len = len; 2219 n->m_next = NULL; 2220 off = 0; 2221 2222 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2223 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2224 2225 IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)", 2226 off, len)); 2227 2228 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2229 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2230 if (!n->m_next) { 2231 m_freem(n); 2232 return key_senderror(so, m, ENOBUFS); 2233 } 2234 2235 n->m_pkthdr.len = 0; 2236 for (nn = n; nn; nn = nn->m_next) 2237 n->m_pkthdr.len += nn->m_len; 2238 2239 newmsg = mtod(n, struct sadb_msg *); 2240 newmsg->sadb_msg_errno = 0; 2241 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2242 2243 m_freem(m); 2244 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2245 } 2246} 2247 2248/* 2249 * SADB_X_GET processing 2250 * receive 2251 * <base, policy(*)> 2252 * from the user(?), 2253 * and send, 2254 * <base, address(SD), policy> 2255 * to the ikmpd. 2256 * policy(*) including direction of policy. 2257 * 2258 * m will always be freed. 2259 */ 2260static int 2261key_spdget(so, m, mhp) 2262 struct socket *so; 2263 struct mbuf *m; 2264 const struct sadb_msghdr *mhp; 2265{ 2266 INIT_VNET_IPSEC(curvnet); 2267 u_int32_t id; 2268 struct secpolicy *sp; 2269 struct mbuf *n; 2270 2271 IPSEC_ASSERT(so != NULL, ("null socket")); 2272 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2273 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2274 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2275 2276 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2277 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2278 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2279 __func__)); 2280 return key_senderror(so, m, EINVAL); 2281 } 2282 2283 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2284 2285 /* Is there SP in SPD ? */ 2286 if ((sp = key_getspbyid(id)) == NULL) { 2287 ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2288 return key_senderror(so, m, ENOENT); 2289 } 2290 2291 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2292 if (n != NULL) { 2293 m_freem(m); 2294 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2295 } else 2296 return key_senderror(so, m, ENOBUFS); 2297} 2298 2299/* 2300 * SADB_X_SPDACQUIRE processing. 2301 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2302 * send 2303 * <base, policy(*)> 2304 * to KMD, and expect to receive 2305 * <base> with SADB_X_SPDACQUIRE if error occured, 2306 * or 2307 * <base, policy> 2308 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2309 * policy(*) is without policy requests. 2310 * 2311 * 0 : succeed 2312 * others: error number 2313 */ 2314int 2315key_spdacquire(sp) 2316 struct secpolicy *sp; 2317{ 2318 INIT_VNET_IPSEC(curvnet); 2319 struct mbuf *result = NULL, *m; 2320 struct secspacq *newspacq; 2321 2322 IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2323 IPSEC_ASSERT(sp->req == NULL, ("policy exists")); 2324 IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 2325 ("policy not IPSEC %u", sp->policy)); 2326 2327 /* Get an entry to check whether sent message or not. */ 2328 newspacq = key_getspacq(&sp->spidx); 2329 if (newspacq != NULL) { 2330 if (V_key_blockacq_count < newspacq->count) { 2331 /* reset counter and do send message. */ 2332 newspacq->count = 0; 2333 } else { 2334 /* increment counter and do nothing. */ 2335 newspacq->count++; 2336 return 0; 2337 } 2338 SPACQ_UNLOCK(); 2339 } else { 2340 /* make new entry for blocking to send SADB_ACQUIRE. */ 2341 newspacq = key_newspacq(&sp->spidx); 2342 if (newspacq == NULL) 2343 return ENOBUFS; 2344 } 2345 2346 /* create new sadb_msg to reply. */ 2347 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2348 if (!m) 2349 return ENOBUFS; 2350 2351 result = m; 2352 2353 result->m_pkthdr.len = 0; 2354 for (m = result; m; m = m->m_next) 2355 result->m_pkthdr.len += m->m_len; 2356 2357 mtod(result, struct sadb_msg *)->sadb_msg_len = 2358 PFKEY_UNIT64(result->m_pkthdr.len); 2359 2360 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2361} 2362 2363/* 2364 * SADB_SPDFLUSH processing 2365 * receive 2366 * <base> 2367 * from the user, and free all entries in secpctree. 2368 * and send, 2369 * <base> 2370 * to the user. 2371 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2372 * 2373 * m will always be freed. 2374 */ 2375static int 2376key_spdflush(so, m, mhp) 2377 struct socket *so; 2378 struct mbuf *m; 2379 const struct sadb_msghdr *mhp; 2380{ 2381 INIT_VNET_IPSEC(curvnet); 2382 struct sadb_msg *newmsg; 2383 struct secpolicy *sp; 2384 u_int dir; 2385 2386 IPSEC_ASSERT(so != NULL, ("null socket")); 2387 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2388 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2389 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2390 2391 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2392 return key_senderror(so, m, EINVAL); 2393 2394 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2395 SPTREE_LOCK(); 2396 LIST_FOREACH(sp, &V_sptree[dir], chain) 2397 sp->state = IPSEC_SPSTATE_DEAD; 2398 SPTREE_UNLOCK(); 2399 } 2400 2401 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2402 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2403 return key_senderror(so, m, ENOBUFS); 2404 } 2405 2406 if (m->m_next) 2407 m_freem(m->m_next); 2408 m->m_next = NULL; 2409 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2410 newmsg = mtod(m, struct sadb_msg *); 2411 newmsg->sadb_msg_errno = 0; 2412 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2413 2414 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2415} 2416 2417/* 2418 * SADB_SPDDUMP processing 2419 * receive 2420 * <base> 2421 * from the user, and dump all SP leaves 2422 * and send, 2423 * <base> ..... 2424 * to the ikmpd. 2425 * 2426 * m will always be freed. 2427 */ 2428static int 2429key_spddump(so, m, mhp) 2430 struct socket *so; 2431 struct mbuf *m; 2432 const struct sadb_msghdr *mhp; 2433{ 2434 INIT_VNET_IPSEC(curvnet); 2435 struct secpolicy *sp; 2436 int cnt; 2437 u_int dir; 2438 struct mbuf *n; 2439 2440 IPSEC_ASSERT(so != NULL, ("null socket")); 2441 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2442 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2443 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2444 2445 /* search SPD entry and get buffer size. */ 2446 cnt = 0; 2447 SPTREE_LOCK(); 2448 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2449 LIST_FOREACH(sp, &V_sptree[dir], chain) { 2450 cnt++; 2451 } 2452 } 2453 2454 if (cnt == 0) { 2455 SPTREE_UNLOCK(); 2456 return key_senderror(so, m, ENOENT); 2457 } 2458 2459 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2460 LIST_FOREACH(sp, &V_sptree[dir], chain) { 2461 --cnt; 2462 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2463 mhp->msg->sadb_msg_pid); 2464 2465 if (n) 2466 key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2467 } 2468 } 2469 2470 SPTREE_UNLOCK(); 2471 m_freem(m); 2472 return 0; 2473} 2474 2475static struct mbuf * 2476key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) 2477{ 2478 struct mbuf *result = NULL, *m; 2479 struct seclifetime lt; 2480 2481 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2482 if (!m) 2483 goto fail; 2484 result = m; 2485 2486 /* 2487 * Note: do not send SADB_X_EXT_NAT_T_* here: 2488 * we are sending traffic endpoints. 2489 */ 2490 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2491 &sp->spidx.src.sa, sp->spidx.prefs, 2492 sp->spidx.ul_proto); 2493 if (!m) 2494 goto fail; 2495 m_cat(result, m); 2496 2497 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2498 &sp->spidx.dst.sa, sp->spidx.prefd, 2499 sp->spidx.ul_proto); 2500 if (!m) 2501 goto fail; 2502 m_cat(result, m); 2503 2504 m = key_sp2msg(sp); 2505 if (!m) 2506 goto fail; 2507 m_cat(result, m); 2508 2509 if(sp->lifetime){ 2510 lt.addtime=sp->created; 2511 lt.usetime= sp->lastused; 2512 m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT); 2513 if (!m) 2514 goto fail; 2515 m_cat(result, m); 2516 2517 lt.addtime=sp->lifetime; 2518 lt.usetime= sp->validtime; 2519 m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD); 2520 if (!m) 2521 goto fail; 2522 m_cat(result, m); 2523 } 2524 2525 if ((result->m_flags & M_PKTHDR) == 0) 2526 goto fail; 2527 2528 if (result->m_len < sizeof(struct sadb_msg)) { 2529 result = m_pullup(result, sizeof(struct sadb_msg)); 2530 if (result == NULL) 2531 goto fail; 2532 } 2533 2534 result->m_pkthdr.len = 0; 2535 for (m = result; m; m = m->m_next) 2536 result->m_pkthdr.len += m->m_len; 2537 2538 mtod(result, struct sadb_msg *)->sadb_msg_len = 2539 PFKEY_UNIT64(result->m_pkthdr.len); 2540 2541 return result; 2542 2543fail: 2544 m_freem(result); 2545 return NULL; 2546} 2547 2548/* 2549 * get PFKEY message length for security policy and request. 2550 */ 2551static u_int 2552key_getspreqmsglen(sp) 2553 struct secpolicy *sp; 2554{ 2555 u_int tlen; 2556 2557 tlen = sizeof(struct sadb_x_policy); 2558 2559 /* if is the policy for ipsec ? */ 2560 if (sp->policy != IPSEC_POLICY_IPSEC) 2561 return tlen; 2562 2563 /* get length of ipsec requests */ 2564 { 2565 struct ipsecrequest *isr; 2566 int len; 2567 2568 for (isr = sp->req; isr != NULL; isr = isr->next) { 2569 len = sizeof(struct sadb_x_ipsecrequest) 2570 + isr->saidx.src.sa.sa_len 2571 + isr->saidx.dst.sa.sa_len; 2572 2573 tlen += PFKEY_ALIGN8(len); 2574 } 2575 } 2576 2577 return tlen; 2578} 2579 2580/* 2581 * SADB_SPDEXPIRE processing 2582 * send 2583 * <base, address(SD), lifetime(CH), policy> 2584 * to KMD by PF_KEY. 2585 * 2586 * OUT: 0 : succeed 2587 * others : error number 2588 */ 2589static int 2590key_spdexpire(sp) 2591 struct secpolicy *sp; 2592{ 2593 struct mbuf *result = NULL, *m; 2594 int len; 2595 int error = -1; 2596 struct sadb_lifetime *lt; 2597 2598 /* XXX: Why do we lock ? */ 2599 2600 IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2601 2602 /* set msg header */ 2603 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2604 if (!m) { 2605 error = ENOBUFS; 2606 goto fail; 2607 } 2608 result = m; 2609 2610 /* create lifetime extension (current and hard) */ 2611 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2612 m = key_alloc_mbuf(len); 2613 if (!m || m->m_next) { /*XXX*/ 2614 if (m) 2615 m_freem(m); 2616 error = ENOBUFS; 2617 goto fail; 2618 } 2619 bzero(mtod(m, caddr_t), len); 2620 lt = mtod(m, struct sadb_lifetime *); 2621 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2622 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2623 lt->sadb_lifetime_allocations = 0; 2624 lt->sadb_lifetime_bytes = 0; 2625 lt->sadb_lifetime_addtime = sp->created; 2626 lt->sadb_lifetime_usetime = sp->lastused; 2627 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2628 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2629 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2630 lt->sadb_lifetime_allocations = 0; 2631 lt->sadb_lifetime_bytes = 0; 2632 lt->sadb_lifetime_addtime = sp->lifetime; 2633 lt->sadb_lifetime_usetime = sp->validtime; 2634 m_cat(result, m); 2635 2636 /* 2637 * Note: do not send SADB_X_EXT_NAT_T_* here: 2638 * we are sending traffic endpoints. 2639 */ 2640 2641 /* set sadb_address for source */ 2642 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2643 &sp->spidx.src.sa, 2644 sp->spidx.prefs, sp->spidx.ul_proto); 2645 if (!m) { 2646 error = ENOBUFS; 2647 goto fail; 2648 } 2649 m_cat(result, m); 2650 2651 /* set sadb_address for destination */ 2652 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2653 &sp->spidx.dst.sa, 2654 sp->spidx.prefd, sp->spidx.ul_proto); 2655 if (!m) { 2656 error = ENOBUFS; 2657 goto fail; 2658 } 2659 m_cat(result, m); 2660 2661 /* set secpolicy */ 2662 m = key_sp2msg(sp); 2663 if (!m) { 2664 error = ENOBUFS; 2665 goto fail; 2666 } 2667 m_cat(result, m); 2668 2669 if ((result->m_flags & M_PKTHDR) == 0) { 2670 error = EINVAL; 2671 goto fail; 2672 } 2673 2674 if (result->m_len < sizeof(struct sadb_msg)) { 2675 result = m_pullup(result, sizeof(struct sadb_msg)); 2676 if (result == NULL) { 2677 error = ENOBUFS; 2678 goto fail; 2679 } 2680 } 2681 2682 result->m_pkthdr.len = 0; 2683 for (m = result; m; m = m->m_next) 2684 result->m_pkthdr.len += m->m_len; 2685 2686 mtod(result, struct sadb_msg *)->sadb_msg_len = 2687 PFKEY_UNIT64(result->m_pkthdr.len); 2688 2689 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2690 2691 fail: 2692 if (result) 2693 m_freem(result); 2694 return error; 2695} 2696 2697/* %%% SAD management */ 2698/* 2699 * allocating a memory for new SA head, and copy from the values of mhp. 2700 * OUT: NULL : failure due to the lack of memory. 2701 * others : pointer to new SA head. 2702 */ 2703static struct secashead * 2704key_newsah(saidx) 2705 struct secasindex *saidx; 2706{ 2707 INIT_VNET_IPSEC(curvnet); 2708 struct secashead *newsah; 2709 2710 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2711 2712 newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2713 if (newsah != NULL) { 2714 int i; 2715 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2716 LIST_INIT(&newsah->savtree[i]); 2717 newsah->saidx = *saidx; 2718 2719 /* add to saidxtree */ 2720 newsah->state = SADB_SASTATE_MATURE; 2721 2722 SAHTREE_LOCK(); 2723 LIST_INSERT_HEAD(&V_sahtree, newsah, chain); 2724 SAHTREE_UNLOCK(); 2725 } 2726 return(newsah); 2727} 2728 2729/* 2730 * delete SA index and all SA registerd. 2731 */ 2732static void 2733key_delsah(sah) 2734 struct secashead *sah; 2735{ 2736 INIT_VNET_IPSEC(curvnet); 2737 struct secasvar *sav, *nextsav; 2738 u_int stateidx; 2739 int zombie = 0; 2740 2741 IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2742 SAHTREE_LOCK_ASSERT(); 2743 2744 /* searching all SA registerd in the secindex. */ 2745 for (stateidx = 0; 2746 stateidx < _ARRAYLEN(saorder_state_any); 2747 stateidx++) { 2748 u_int state = saorder_state_any[stateidx]; 2749 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2750 if (sav->refcnt == 0) { 2751 /* sanity check */ 2752 KEY_CHKSASTATE(state, sav->state, __func__); 2753 /* 2754 * do NOT call KEY_FREESAV here: 2755 * it will only delete the sav if refcnt == 1, 2756 * where we already know that refcnt == 0 2757 */ 2758 key_delsav(sav); 2759 } else { 2760 /* give up to delete this sa */ 2761 zombie++; 2762 } 2763 } 2764 } 2765 if (!zombie) { /* delete only if there are savs */ 2766 /* remove from tree of SA index */ 2767 if (__LIST_CHAINED(sah)) 2768 LIST_REMOVE(sah, chain); 2769 if (sah->sa_route.ro_rt) { 2770 RTFREE(sah->sa_route.ro_rt); 2771 sah->sa_route.ro_rt = (struct rtentry *)NULL; 2772 } 2773 free(sah, M_IPSEC_SAH); 2774 } 2775} 2776 2777/* 2778 * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2779 * and copy the values of mhp into new buffer. 2780 * When SAD message type is GETSPI: 2781 * to set sequence number from acq_seq++, 2782 * to set zero to SPI. 2783 * not to call key_setsava(). 2784 * OUT: NULL : fail 2785 * others : pointer to new secasvar. 2786 * 2787 * does not modify mbuf. does not free mbuf on error. 2788 */ 2789static struct secasvar * 2790key_newsav(m, mhp, sah, errp, where, tag) 2791 struct mbuf *m; 2792 const struct sadb_msghdr *mhp; 2793 struct secashead *sah; 2794 int *errp; 2795 const char* where; 2796 int tag; 2797{ 2798 INIT_VNET_IPSEC(curvnet); 2799 struct secasvar *newsav; 2800 const struct sadb_sa *xsa; 2801 2802 IPSEC_ASSERT(m != NULL, ("null mbuf")); 2803 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2804 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2805 IPSEC_ASSERT(sah != NULL, ("null secashead")); 2806 2807 newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2808 if (newsav == NULL) { 2809 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2810 *errp = ENOBUFS; 2811 goto done; 2812 } 2813 2814 switch (mhp->msg->sadb_msg_type) { 2815 case SADB_GETSPI: 2816 newsav->spi = 0; 2817 2818#ifdef IPSEC_DOSEQCHECK 2819 /* sync sequence number */ 2820 if (mhp->msg->sadb_msg_seq == 0) 2821 newsav->seq = 2822 (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); 2823 else 2824#endif 2825 newsav->seq = mhp->msg->sadb_msg_seq; 2826 break; 2827 2828 case SADB_ADD: 2829 /* sanity check */ 2830 if (mhp->ext[SADB_EXT_SA] == NULL) { 2831 free(newsav, M_IPSEC_SA); 2832 newsav = NULL; 2833 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2834 __func__)); 2835 *errp = EINVAL; 2836 goto done; 2837 } 2838 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2839 newsav->spi = xsa->sadb_sa_spi; 2840 newsav->seq = mhp->msg->sadb_msg_seq; 2841 break; 2842 default: 2843 free(newsav, M_IPSEC_SA); 2844 newsav = NULL; 2845 *errp = EINVAL; 2846 goto done; 2847 } 2848 2849 2850 /* copy sav values */ 2851 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2852 *errp = key_setsaval(newsav, m, mhp); 2853 if (*errp) { 2854 free(newsav, M_IPSEC_SA); 2855 newsav = NULL; 2856 goto done; 2857 } 2858 } 2859 2860 SECASVAR_LOCK_INIT(newsav); 2861 2862 /* reset created */ 2863 newsav->created = time_second; 2864 newsav->pid = mhp->msg->sadb_msg_pid; 2865 2866 /* add to satree */ 2867 newsav->sah = sah; 2868 sa_initref(newsav); 2869 newsav->state = SADB_SASTATE_LARVAL; 2870 2871 /* XXX locking??? */ 2872 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2873 secasvar, chain); 2874done: 2875 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2876 printf("DP %s from %s:%u return SP:%p\n", __func__, 2877 where, tag, newsav)); 2878 2879 return newsav; 2880} 2881 2882/* 2883 * free() SA variable entry. 2884 */ 2885static void 2886key_cleansav(struct secasvar *sav) 2887{ 2888 /* 2889 * Cleanup xform state. Note that zeroize'ing causes the 2890 * keys to be cleared; otherwise we must do it ourself. 2891 */ 2892 if (sav->tdb_xform != NULL) { 2893 sav->tdb_xform->xf_zeroize(sav); 2894 sav->tdb_xform = NULL; 2895 } else { 2896 KASSERT(sav->iv == NULL, ("iv but no xform")); 2897 if (sav->key_auth != NULL) 2898 bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); 2899 if (sav->key_enc != NULL) 2900 bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc)); 2901 } 2902 if (sav->key_auth != NULL) { 2903 if (sav->key_auth->key_data != NULL) 2904 free(sav->key_auth->key_data, M_IPSEC_MISC); 2905 free(sav->key_auth, M_IPSEC_MISC); 2906 sav->key_auth = NULL; 2907 } 2908 if (sav->key_enc != NULL) { 2909 if (sav->key_enc->key_data != NULL) 2910 free(sav->key_enc->key_data, M_IPSEC_MISC); 2911 free(sav->key_enc, M_IPSEC_MISC); 2912 sav->key_enc = NULL; 2913 } 2914 if (sav->sched) { 2915 bzero(sav->sched, sav->schedlen); 2916 free(sav->sched, M_IPSEC_MISC); 2917 sav->sched = NULL; 2918 } 2919 if (sav->replay != NULL) { 2920 free(sav->replay, M_IPSEC_MISC); 2921 sav->replay = NULL; 2922 } 2923 if (sav->lft_c != NULL) { 2924 free(sav->lft_c, M_IPSEC_MISC); 2925 sav->lft_c = NULL; 2926 } 2927 if (sav->lft_h != NULL) { 2928 free(sav->lft_h, M_IPSEC_MISC); 2929 sav->lft_h = NULL; 2930 } 2931 if (sav->lft_s != NULL) { 2932 free(sav->lft_s, M_IPSEC_MISC); 2933 sav->lft_s = NULL; 2934 } 2935} 2936 2937/* 2938 * free() SA variable entry. 2939 */ 2940static void 2941key_delsav(sav) 2942 struct secasvar *sav; 2943{ 2944 IPSEC_ASSERT(sav != NULL, ("null sav")); 2945 IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2946 2947 /* remove from SA header */ 2948 if (__LIST_CHAINED(sav)) 2949 LIST_REMOVE(sav, chain); 2950 key_cleansav(sav); 2951 SECASVAR_LOCK_DESTROY(sav); 2952 free(sav, M_IPSEC_SA); 2953} 2954 2955/* 2956 * search SAD. 2957 * OUT: 2958 * NULL : not found 2959 * others : found, pointer to a SA. 2960 */ 2961static struct secashead * 2962key_getsah(saidx) 2963 struct secasindex *saidx; 2964{ 2965 INIT_VNET_IPSEC(curvnet); 2966 struct secashead *sah; 2967 2968 SAHTREE_LOCK(); 2969 LIST_FOREACH(sah, &V_sahtree, chain) { 2970 if (sah->state == SADB_SASTATE_DEAD) 2971 continue; 2972 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2973 break; 2974 } 2975 SAHTREE_UNLOCK(); 2976 2977 return sah; 2978} 2979 2980/* 2981 * check not to be duplicated SPI. 2982 * NOTE: this function is too slow due to searching all SAD. 2983 * OUT: 2984 * NULL : not found 2985 * others : found, pointer to a SA. 2986 */ 2987static struct secasvar * 2988key_checkspidup(saidx, spi) 2989 struct secasindex *saidx; 2990 u_int32_t spi; 2991{ 2992 INIT_VNET_IPSEC(curvnet); 2993 struct secashead *sah; 2994 struct secasvar *sav; 2995 2996 /* check address family */ 2997 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2998 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2999 __func__)); 3000 return NULL; 3001 } 3002 3003 sav = NULL; 3004 /* check all SAD */ 3005 SAHTREE_LOCK(); 3006 LIST_FOREACH(sah, &V_sahtree, chain) { 3007 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3008 continue; 3009 sav = key_getsavbyspi(sah, spi); 3010 if (sav != NULL) 3011 break; 3012 } 3013 SAHTREE_UNLOCK(); 3014 3015 return sav; 3016} 3017 3018/* 3019 * search SAD litmited alive SA, protocol, SPI. 3020 * OUT: 3021 * NULL : not found 3022 * others : found, pointer to a SA. 3023 */ 3024static struct secasvar * 3025key_getsavbyspi(sah, spi) 3026 struct secashead *sah; 3027 u_int32_t spi; 3028{ 3029 INIT_VNET_IPSEC(curvnet); 3030 struct secasvar *sav; 3031 u_int stateidx, state; 3032 3033 sav = NULL; 3034 SAHTREE_LOCK_ASSERT(); 3035 /* search all status */ 3036 for (stateidx = 0; 3037 stateidx < _ARRAYLEN(saorder_state_alive); 3038 stateidx++) { 3039 3040 state = saorder_state_alive[stateidx]; 3041 LIST_FOREACH(sav, &sah->savtree[state], chain) { 3042 3043 /* sanity check */ 3044 if (sav->state != state) { 3045 ipseclog((LOG_DEBUG, "%s: " 3046 "invalid sav->state (queue: %d SA: %d)\n", 3047 __func__, state, sav->state)); 3048 continue; 3049 } 3050 3051 if (sav->spi == spi) 3052 return sav; 3053 } 3054 } 3055 3056 return NULL; 3057} 3058 3059/* 3060 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3061 * You must update these if need. 3062 * OUT: 0: success. 3063 * !0: failure. 3064 * 3065 * does not modify mbuf. does not free mbuf on error. 3066 */ 3067static int 3068key_setsaval(sav, m, mhp) 3069 struct secasvar *sav; 3070 struct mbuf *m; 3071 const struct sadb_msghdr *mhp; 3072{ 3073 INIT_VNET_IPSEC(curvnet); 3074 int error = 0; 3075 3076 IPSEC_ASSERT(m != NULL, ("null mbuf")); 3077 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 3078 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 3079 3080 /* initialization */ 3081 sav->replay = NULL; 3082 sav->key_auth = NULL; 3083 sav->key_enc = NULL; 3084 sav->sched = NULL; 3085 sav->schedlen = 0; 3086 sav->iv = NULL; 3087 sav->lft_c = NULL; 3088 sav->lft_h = NULL; 3089 sav->lft_s = NULL; 3090 sav->tdb_xform = NULL; /* transform */ 3091 sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3092 sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3093 sav->tdb_compalgxform = NULL; /* compression algorithm */ 3094 /* Initialize even if NAT-T not compiled in: */ 3095 sav->natt_type = 0; 3096 sav->natt_esp_frag_len = 0; 3097 3098 /* SA */ 3099 if (mhp->ext[SADB_EXT_SA] != NULL) { 3100 const struct sadb_sa *sa0; 3101 3102 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3103 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3104 error = EINVAL; 3105 goto fail; 3106 } 3107 3108 sav->alg_auth = sa0->sadb_sa_auth; 3109 sav->alg_enc = sa0->sadb_sa_encrypt; 3110 sav->flags = sa0->sadb_sa_flags; 3111 3112 /* replay window */ 3113 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3114 sav->replay = (struct secreplay *) 3115 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 3116 if (sav->replay == NULL) { 3117 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3118 __func__)); 3119 error = ENOBUFS; 3120 goto fail; 3121 } 3122 if (sa0->sadb_sa_replay != 0) 3123 sav->replay->bitmap = (caddr_t)(sav->replay+1); 3124 sav->replay->wsize = sa0->sadb_sa_replay; 3125 } 3126 } 3127 3128 /* Authentication keys */ 3129 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3130 const struct sadb_key *key0; 3131 int len; 3132 3133 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3134 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3135 3136 error = 0; 3137 if (len < sizeof(*key0)) { 3138 error = EINVAL; 3139 goto fail; 3140 } 3141 switch (mhp->msg->sadb_msg_satype) { 3142 case SADB_SATYPE_AH: 3143 case SADB_SATYPE_ESP: 3144 case SADB_X_SATYPE_TCPSIGNATURE: 3145 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3146 sav->alg_auth != SADB_X_AALG_NULL) 3147 error = EINVAL; 3148 break; 3149 case SADB_X_SATYPE_IPCOMP: 3150 default: 3151 error = EINVAL; 3152 break; 3153 } 3154 if (error) { 3155 ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3156 __func__)); 3157 goto fail; 3158 } 3159 3160 sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, 3161 M_IPSEC_MISC); 3162 if (sav->key_auth == NULL ) { 3163 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3164 __func__)); 3165 error = ENOBUFS; 3166 goto fail; 3167 } 3168 } 3169 3170 /* Encryption key */ 3171 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3172 const struct sadb_key *key0; 3173 int len; 3174 3175 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3176 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3177 3178 error = 0; 3179 if (len < sizeof(*key0)) { 3180 error = EINVAL; 3181 goto fail; 3182 } 3183 switch (mhp->msg->sadb_msg_satype) { 3184 case SADB_SATYPE_ESP: 3185 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3186 sav->alg_enc != SADB_EALG_NULL) { 3187 error = EINVAL; 3188 break; 3189 } 3190 sav->key_enc = (struct seckey *)key_dup_keymsg(key0, 3191 len, 3192 M_IPSEC_MISC); 3193 if (sav->key_enc == NULL) { 3194 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3195 __func__)); 3196 error = ENOBUFS; 3197 goto fail; 3198 } 3199 break; 3200 case SADB_X_SATYPE_IPCOMP: 3201 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3202 error = EINVAL; 3203 sav->key_enc = NULL; /*just in case*/ 3204 break; 3205 case SADB_SATYPE_AH: 3206 case SADB_X_SATYPE_TCPSIGNATURE: 3207 default: 3208 error = EINVAL; 3209 break; 3210 } 3211 if (error) { 3212 ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3213 __func__)); 3214 goto fail; 3215 } 3216 } 3217 3218 /* set iv */ 3219 sav->ivlen = 0; 3220 3221 switch (mhp->msg->sadb_msg_satype) { 3222 case SADB_SATYPE_AH: 3223 error = xform_init(sav, XF_AH); 3224 break; 3225 case SADB_SATYPE_ESP: 3226 error = xform_init(sav, XF_ESP); 3227 break; 3228 case SADB_X_SATYPE_IPCOMP: 3229 error = xform_init(sav, XF_IPCOMP); 3230 break; 3231 case SADB_X_SATYPE_TCPSIGNATURE: 3232 error = xform_init(sav, XF_TCPSIGNATURE); 3233 break; 3234 } 3235 if (error) { 3236 ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3237 __func__, mhp->msg->sadb_msg_satype)); 3238 goto fail; 3239 } 3240 3241 /* reset created */ 3242 sav->created = time_second; 3243 3244 /* make lifetime for CURRENT */ 3245 sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); 3246 if (sav->lft_c == NULL) { 3247 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3248 error = ENOBUFS; 3249 goto fail; 3250 } 3251 3252 sav->lft_c->allocations = 0; 3253 sav->lft_c->bytes = 0; 3254 sav->lft_c->addtime = time_second; 3255 sav->lft_c->usetime = 0; 3256 3257 /* lifetimes for HARD and SOFT */ 3258 { 3259 const struct sadb_lifetime *lft0; 3260 3261 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3262 if (lft0 != NULL) { 3263 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3264 error = EINVAL; 3265 goto fail; 3266 } 3267 sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3268 if (sav->lft_h == 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 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3277 if (lft0 != NULL) { 3278 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3279 error = EINVAL; 3280 goto fail; 3281 } 3282 sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3283 if (sav->lft_s == NULL) { 3284 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3285 error = ENOBUFS; 3286 goto fail; 3287 } 3288 /* to be initialize ? */ 3289 } 3290 } 3291 3292 return 0; 3293 3294 fail: 3295 /* initialization */ 3296 key_cleansav(sav); 3297 3298 return error; 3299} 3300 3301/* 3302 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3303 * OUT: 0: valid 3304 * other: errno 3305 */ 3306static int 3307key_mature(struct secasvar *sav) 3308{ 3309 INIT_VNET_IPSEC(curvnet); 3310 int error; 3311 3312 /* check SPI value */ 3313 switch (sav->sah->saidx.proto) { 3314 case IPPROTO_ESP: 3315 case IPPROTO_AH: 3316 /* 3317 * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values 3318 * 1-255 reserved by IANA for future use, 3319 * 0 for implementation specific, local use. 3320 */ 3321 if (ntohl(sav->spi) <= 255) { 3322 ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3323 __func__, (u_int32_t)ntohl(sav->spi))); 3324 return EINVAL; 3325 } 3326 break; 3327 } 3328 3329 /* check satype */ 3330 switch (sav->sah->saidx.proto) { 3331 case IPPROTO_ESP: 3332 /* check flags */ 3333 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3334 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3335 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3336 "given to old-esp.\n", __func__)); 3337 return EINVAL; 3338 } 3339 error = xform_init(sav, XF_ESP); 3340 break; 3341 case IPPROTO_AH: 3342 /* check flags */ 3343 if (sav->flags & SADB_X_EXT_DERIV) { 3344 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3345 "given to AH SA.\n", __func__)); 3346 return EINVAL; 3347 } 3348 if (sav->alg_enc != SADB_EALG_NONE) { 3349 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3350 "mismated.\n", __func__)); 3351 return(EINVAL); 3352 } 3353 error = xform_init(sav, XF_AH); 3354 break; 3355 case IPPROTO_IPCOMP: 3356 if (sav->alg_auth != SADB_AALG_NONE) { 3357 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3358 "mismated.\n", __func__)); 3359 return(EINVAL); 3360 } 3361 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3362 && ntohl(sav->spi) >= 0x10000) { 3363 ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3364 __func__)); 3365 return(EINVAL); 3366 } 3367 error = xform_init(sav, XF_IPCOMP); 3368 break; 3369 case IPPROTO_TCP: 3370 if (sav->alg_enc != SADB_EALG_NONE) { 3371 ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3372 "mismated.\n", __func__)); 3373 return(EINVAL); 3374 } 3375 error = xform_init(sav, XF_TCPSIGNATURE); 3376 break; 3377 default: 3378 ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3379 error = EPROTONOSUPPORT; 3380 break; 3381 } 3382 if (error == 0) { 3383 SAHTREE_LOCK(); 3384 key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3385 SAHTREE_UNLOCK(); 3386 } 3387 return (error); 3388} 3389 3390/* 3391 * subroutine for SADB_GET and SADB_DUMP. 3392 */ 3393static struct mbuf * 3394key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3395 u_int32_t seq, u_int32_t pid) 3396{ 3397 struct mbuf *result = NULL, *tres = NULL, *m; 3398 int i; 3399 int dumporder[] = { 3400 SADB_EXT_SA, SADB_X_EXT_SA2, 3401 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3402 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3403 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3404 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3405 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3406#ifdef IPSEC_NAT_T 3407 SADB_X_EXT_NAT_T_TYPE, 3408 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3409 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3410 SADB_X_EXT_NAT_T_FRAG, 3411#endif 3412 }; 3413 3414 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3415 if (m == NULL) 3416 goto fail; 3417 result = m; 3418 3419 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3420 m = NULL; 3421 switch (dumporder[i]) { 3422 case SADB_EXT_SA: 3423 m = key_setsadbsa(sav); 3424 if (!m) 3425 goto fail; 3426 break; 3427 3428 case SADB_X_EXT_SA2: 3429 m = key_setsadbxsa2(sav->sah->saidx.mode, 3430 sav->replay ? sav->replay->count : 0, 3431 sav->sah->saidx.reqid); 3432 if (!m) 3433 goto fail; 3434 break; 3435 3436 case SADB_EXT_ADDRESS_SRC: 3437 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3438 &sav->sah->saidx.src.sa, 3439 FULLMASK, IPSEC_ULPROTO_ANY); 3440 if (!m) 3441 goto fail; 3442 break; 3443 3444 case SADB_EXT_ADDRESS_DST: 3445 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3446 &sav->sah->saidx.dst.sa, 3447 FULLMASK, IPSEC_ULPROTO_ANY); 3448 if (!m) 3449 goto fail; 3450 break; 3451 3452 case SADB_EXT_KEY_AUTH: 3453 if (!sav->key_auth) 3454 continue; 3455 m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH); 3456 if (!m) 3457 goto fail; 3458 break; 3459 3460 case SADB_EXT_KEY_ENCRYPT: 3461 if (!sav->key_enc) 3462 continue; 3463 m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT); 3464 if (!m) 3465 goto fail; 3466 break; 3467 3468 case SADB_EXT_LIFETIME_CURRENT: 3469 if (!sav->lft_c) 3470 continue; 3471 m = key_setlifetime(sav->lft_c, 3472 SADB_EXT_LIFETIME_CURRENT); 3473 if (!m) 3474 goto fail; 3475 break; 3476 3477 case SADB_EXT_LIFETIME_HARD: 3478 if (!sav->lft_h) 3479 continue; 3480 m = key_setlifetime(sav->lft_h, 3481 SADB_EXT_LIFETIME_HARD); 3482 if (!m) 3483 goto fail; 3484 break; 3485 3486 case SADB_EXT_LIFETIME_SOFT: 3487 if (!sav->lft_s) 3488 continue; 3489 m = key_setlifetime(sav->lft_s, 3490 SADB_EXT_LIFETIME_SOFT); 3491 3492 if (!m) 3493 goto fail; 3494 break; 3495 3496#ifdef IPSEC_NAT_T 3497 case SADB_X_EXT_NAT_T_TYPE: 3498 m = key_setsadbxtype(sav->natt_type); 3499 if (!m) 3500 goto fail; 3501 break; 3502 3503 case SADB_X_EXT_NAT_T_DPORT: 3504 m = key_setsadbxport( 3505 KEY_PORTFROMSADDR(&sav->sah->saidx.dst), 3506 SADB_X_EXT_NAT_T_DPORT); 3507 if (!m) 3508 goto fail; 3509 break; 3510 3511 case SADB_X_EXT_NAT_T_SPORT: 3512 m = key_setsadbxport( 3513 KEY_PORTFROMSADDR(&sav->sah->saidx.src), 3514 SADB_X_EXT_NAT_T_SPORT); 3515 if (!m) 3516 goto fail; 3517 break; 3518 3519 case SADB_X_EXT_NAT_T_OAI: 3520 case SADB_X_EXT_NAT_T_OAR: 3521 case SADB_X_EXT_NAT_T_FRAG: 3522 /* We do not (yet) support those. */ 3523 continue; 3524#endif 3525 3526 case SADB_EXT_ADDRESS_PROXY: 3527 case SADB_EXT_IDENTITY_SRC: 3528 case SADB_EXT_IDENTITY_DST: 3529 /* XXX: should we brought from SPD ? */ 3530 case SADB_EXT_SENSITIVITY: 3531 default: 3532 continue; 3533 } 3534 3535 if (!m) 3536 goto fail; 3537 if (tres) 3538 m_cat(m, tres); 3539 tres = m; 3540 3541 } 3542 3543 m_cat(result, tres); 3544 if (result->m_len < sizeof(struct sadb_msg)) { 3545 result = m_pullup(result, sizeof(struct sadb_msg)); 3546 if (result == NULL) 3547 goto fail; 3548 } 3549 3550 result->m_pkthdr.len = 0; 3551 for (m = result; m; m = m->m_next) 3552 result->m_pkthdr.len += m->m_len; 3553 3554 mtod(result, struct sadb_msg *)->sadb_msg_len = 3555 PFKEY_UNIT64(result->m_pkthdr.len); 3556 3557 return result; 3558 3559fail: 3560 m_freem(result); 3561 m_freem(tres); 3562 return NULL; 3563} 3564 3565/* 3566 * set data into sadb_msg. 3567 */ 3568static struct mbuf * 3569key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, 3570 pid_t pid, u_int16_t reserved) 3571{ 3572 struct mbuf *m; 3573 struct sadb_msg *p; 3574 int len; 3575 3576 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3577 if (len > MCLBYTES) 3578 return NULL; 3579 MGETHDR(m, M_DONTWAIT, MT_DATA); 3580 if (m && len > MHLEN) { 3581 MCLGET(m, M_DONTWAIT); 3582 if ((m->m_flags & M_EXT) == 0) { 3583 m_freem(m); 3584 m = NULL; 3585 } 3586 } 3587 if (!m) 3588 return NULL; 3589 m->m_pkthdr.len = m->m_len = len; 3590 m->m_next = NULL; 3591 3592 p = mtod(m, struct sadb_msg *); 3593 3594 bzero(p, len); 3595 p->sadb_msg_version = PF_KEY_V2; 3596 p->sadb_msg_type = type; 3597 p->sadb_msg_errno = 0; 3598 p->sadb_msg_satype = satype; 3599 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3600 p->sadb_msg_reserved = reserved; 3601 p->sadb_msg_seq = seq; 3602 p->sadb_msg_pid = (u_int32_t)pid; 3603 3604 return m; 3605} 3606 3607/* 3608 * copy secasvar data into sadb_address. 3609 */ 3610static struct mbuf * 3611key_setsadbsa(sav) 3612 struct secasvar *sav; 3613{ 3614 struct mbuf *m; 3615 struct sadb_sa *p; 3616 int len; 3617 3618 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3619 m = key_alloc_mbuf(len); 3620 if (!m || m->m_next) { /*XXX*/ 3621 if (m) 3622 m_freem(m); 3623 return NULL; 3624 } 3625 3626 p = mtod(m, struct sadb_sa *); 3627 3628 bzero(p, len); 3629 p->sadb_sa_len = PFKEY_UNIT64(len); 3630 p->sadb_sa_exttype = SADB_EXT_SA; 3631 p->sadb_sa_spi = sav->spi; 3632 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3633 p->sadb_sa_state = sav->state; 3634 p->sadb_sa_auth = sav->alg_auth; 3635 p->sadb_sa_encrypt = sav->alg_enc; 3636 p->sadb_sa_flags = sav->flags; 3637 3638 return m; 3639} 3640 3641/* 3642 * set data into sadb_address. 3643 */ 3644static struct mbuf * 3645key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto) 3646{ 3647 struct mbuf *m; 3648 struct sadb_address *p; 3649 size_t len; 3650 3651 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3652 PFKEY_ALIGN8(saddr->sa_len); 3653 m = key_alloc_mbuf(len); 3654 if (!m || m->m_next) { /*XXX*/ 3655 if (m) 3656 m_freem(m); 3657 return NULL; 3658 } 3659 3660 p = mtod(m, struct sadb_address *); 3661 3662 bzero(p, len); 3663 p->sadb_address_len = PFKEY_UNIT64(len); 3664 p->sadb_address_exttype = exttype; 3665 p->sadb_address_proto = ul_proto; 3666 if (prefixlen == FULLMASK) { 3667 switch (saddr->sa_family) { 3668 case AF_INET: 3669 prefixlen = sizeof(struct in_addr) << 3; 3670 break; 3671 case AF_INET6: 3672 prefixlen = sizeof(struct in6_addr) << 3; 3673 break; 3674 default: 3675 ; /*XXX*/ 3676 } 3677 } 3678 p->sadb_address_prefixlen = prefixlen; 3679 p->sadb_address_reserved = 0; 3680 3681 bcopy(saddr, 3682 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3683 saddr->sa_len); 3684 3685 return m; 3686} 3687 3688/* 3689 * set data into sadb_x_sa2. 3690 */ 3691static struct mbuf * 3692key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) 3693{ 3694 struct mbuf *m; 3695 struct sadb_x_sa2 *p; 3696 size_t len; 3697 3698 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3699 m = key_alloc_mbuf(len); 3700 if (!m || m->m_next) { /*XXX*/ 3701 if (m) 3702 m_freem(m); 3703 return NULL; 3704 } 3705 3706 p = mtod(m, struct sadb_x_sa2 *); 3707 3708 bzero(p, len); 3709 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3710 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3711 p->sadb_x_sa2_mode = mode; 3712 p->sadb_x_sa2_reserved1 = 0; 3713 p->sadb_x_sa2_reserved2 = 0; 3714 p->sadb_x_sa2_sequence = seq; 3715 p->sadb_x_sa2_reqid = reqid; 3716 3717 return m; 3718} 3719 3720#ifdef IPSEC_NAT_T 3721/* 3722 * Set a type in sadb_x_nat_t_type. 3723 */ 3724static struct mbuf * 3725key_setsadbxtype(u_int16_t type) 3726{ 3727 struct mbuf *m; 3728 size_t len; 3729 struct sadb_x_nat_t_type *p; 3730 3731 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3732 3733 m = key_alloc_mbuf(len); 3734 if (!m || m->m_next) { /*XXX*/ 3735 if (m) 3736 m_freem(m); 3737 return (NULL); 3738 } 3739 3740 p = mtod(m, struct sadb_x_nat_t_type *); 3741 3742 bzero(p, len); 3743 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3744 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3745 p->sadb_x_nat_t_type_type = type; 3746 3747 return (m); 3748} 3749/* 3750 * Set a port in sadb_x_nat_t_port. 3751 * In contrast to default RFC 2367 behaviour, port is in network byte order. 3752 */ 3753static struct mbuf * 3754key_setsadbxport(u_int16_t port, u_int16_t type) 3755{ 3756 struct mbuf *m; 3757 size_t len; 3758 struct sadb_x_nat_t_port *p; 3759 3760 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3761 3762 m = key_alloc_mbuf(len); 3763 if (!m || m->m_next) { /*XXX*/ 3764 if (m) 3765 m_freem(m); 3766 return (NULL); 3767 } 3768 3769 p = mtod(m, struct sadb_x_nat_t_port *); 3770 3771 bzero(p, len); 3772 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3773 p->sadb_x_nat_t_port_exttype = type; 3774 p->sadb_x_nat_t_port_port = port; 3775 3776 return (m); 3777} 3778 3779/* 3780 * Get port from sockaddr. Port is in network byte order. 3781 */ 3782u_int16_t 3783key_portfromsaddr(struct sockaddr *sa) 3784{ 3785 INIT_VNET_IPSEC(curvnet); 3786 3787 switch (sa->sa_family) { 3788#ifdef INET 3789 case AF_INET: 3790 return ((struct sockaddr_in *)sa)->sin_port; 3791#endif 3792#ifdef INET6 3793 case AF_INET6: 3794 return ((struct sockaddr_in6 *)sa)->sin6_port; 3795#endif 3796 } 3797 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3798 printf("DP %s unexpected address family %d\n", 3799 __func__, sa->sa_family)); 3800 return (0); 3801} 3802#endif /* IPSEC_NAT_T */ 3803 3804/* 3805 * Set port in struct sockaddr. Port is in network byte order. 3806 */ 3807static void 3808key_porttosaddr(struct sockaddr *sa, u_int16_t port) 3809{ 3810 INIT_VNET_IPSEC(curvnet); 3811 3812 switch (sa->sa_family) { 3813#ifdef INET 3814 case AF_INET: 3815 ((struct sockaddr_in *)sa)->sin_port = port; 3816 break; 3817#endif 3818#ifdef INET6 3819 case AF_INET6: 3820 ((struct sockaddr_in6 *)sa)->sin6_port = port; 3821 break; 3822#endif 3823 default: 3824 ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n", 3825 __func__, sa->sa_family)); 3826 break; 3827 } 3828} 3829 3830/* 3831 * set data into sadb_x_policy 3832 */ 3833static struct mbuf * 3834key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3835{ 3836 struct mbuf *m; 3837 struct sadb_x_policy *p; 3838 size_t len; 3839 3840 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3841 m = key_alloc_mbuf(len); 3842 if (!m || m->m_next) { /*XXX*/ 3843 if (m) 3844 m_freem(m); 3845 return NULL; 3846 } 3847 3848 p = mtod(m, struct sadb_x_policy *); 3849 3850 bzero(p, len); 3851 p->sadb_x_policy_len = PFKEY_UNIT64(len); 3852 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3853 p->sadb_x_policy_type = type; 3854 p->sadb_x_policy_dir = dir; 3855 p->sadb_x_policy_id = id; 3856 3857 return m; 3858} 3859 3860/* %%% utilities */ 3861/* Take a key message (sadb_key) from the socket and turn it into one 3862 * of the kernel's key structures (seckey). 3863 * 3864 * IN: pointer to the src 3865 * OUT: NULL no more memory 3866 */ 3867struct seckey * 3868key_dup_keymsg(const struct sadb_key *src, u_int len, 3869 struct malloc_type *type) 3870{ 3871 INIT_VNET_IPSEC(curvnet); 3872 struct seckey *dst; 3873 dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); 3874 if (dst != NULL) { 3875 dst->bits = src->sadb_key_bits; 3876 dst->key_data = (char *)malloc(len, type, M_NOWAIT); 3877 if (dst->key_data != NULL) { 3878 bcopy((const char *)src + sizeof(struct sadb_key), 3879 dst->key_data, len); 3880 } else { 3881 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3882 __func__)); 3883 free(dst, type); 3884 dst = NULL; 3885 } 3886 } else { 3887 ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3888 __func__)); 3889 3890 } 3891 return dst; 3892} 3893 3894/* Take a lifetime message (sadb_lifetime) passed in on a socket and 3895 * turn it into one of the kernel's lifetime structures (seclifetime). 3896 * 3897 * IN: pointer to the destination, source and malloc type 3898 * OUT: NULL, no more memory 3899 */ 3900 3901static struct seclifetime * 3902key_dup_lifemsg(const struct sadb_lifetime *src, 3903 struct malloc_type *type) 3904{ 3905 INIT_VNET_IPSEC(curvnet); 3906 struct seclifetime *dst = NULL; 3907 3908 dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), 3909 type, M_NOWAIT); 3910 if (dst == NULL) { 3911 /* XXX counter */ 3912 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3913 } else { 3914 dst->allocations = src->sadb_lifetime_allocations; 3915 dst->bytes = src->sadb_lifetime_bytes; 3916 dst->addtime = src->sadb_lifetime_addtime; 3917 dst->usetime = src->sadb_lifetime_usetime; 3918 } 3919 return dst; 3920} 3921 3922/* compare my own address 3923 * OUT: 1: true, i.e. my address. 3924 * 0: false 3925 */ 3926int 3927key_ismyaddr(sa) 3928 struct sockaddr *sa; 3929{ 3930#ifdef INET 3931 INIT_VNET_INET(curvnet); 3932 struct sockaddr_in *sin; 3933 struct in_ifaddr *ia; 3934#endif 3935 3936 IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3937 3938 switch (sa->sa_family) { 3939#ifdef INET 3940 case AF_INET: 3941 sin = (struct sockaddr_in *)sa; 3942 IN_IFADDR_RLOCK(); 3943 for (ia = V_in_ifaddrhead.tqh_first; ia; 3944 ia = ia->ia_link.tqe_next) 3945 { 3946 if (sin->sin_family == ia->ia_addr.sin_family && 3947 sin->sin_len == ia->ia_addr.sin_len && 3948 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3949 { 3950 IN_IFADDR_RUNLOCK(); 3951 return 1; 3952 } 3953 } 3954 IN_IFADDR_RUNLOCK(); 3955 break; 3956#endif 3957#ifdef INET6 3958 case AF_INET6: 3959 return key_ismyaddr6((struct sockaddr_in6 *)sa); 3960#endif 3961 } 3962 3963 return 0; 3964} 3965 3966#ifdef INET6 3967/* 3968 * compare my own address for IPv6. 3969 * 1: ours 3970 * 0: other 3971 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3972 */ 3973#include <netinet6/in6_var.h> 3974 3975static int 3976key_ismyaddr6(sin6) 3977 struct sockaddr_in6 *sin6; 3978{ 3979 INIT_VNET_INET6(curvnet); 3980 struct in6_ifaddr *ia; 3981#if 0 3982 struct in6_multi *in6m; 3983#endif 3984 3985 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 3986 if (key_sockaddrcmp((struct sockaddr *)&sin6, 3987 (struct sockaddr *)&ia->ia_addr, 0) == 0) 3988 return 1; 3989 3990#if 0 3991 /* 3992 * XXX Multicast 3993 * XXX why do we care about multlicast here while we don't care 3994 * about IPv4 multicast?? 3995 * XXX scope 3996 */ 3997 in6m = NULL; 3998 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3999 if (in6m) 4000 return 1; 4001#endif 4002 } 4003 4004 /* loopback, just for safety */ 4005 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4006 return 1; 4007 4008 return 0; 4009} 4010#endif /*INET6*/ 4011 4012/* 4013 * compare two secasindex structure. 4014 * flag can specify to compare 2 saidxes. 4015 * compare two secasindex structure without both mode and reqid. 4016 * don't compare port. 4017 * IN: 4018 * saidx0: source, it can be in SAD. 4019 * saidx1: object. 4020 * OUT: 4021 * 1 : equal 4022 * 0 : not equal 4023 */ 4024static int 4025key_cmpsaidx( 4026 const struct secasindex *saidx0, 4027 const struct secasindex *saidx1, 4028 int flag) 4029{ 4030 int chkport = 0; 4031 4032 /* sanity */ 4033 if (saidx0 == NULL && saidx1 == NULL) 4034 return 1; 4035 4036 if (saidx0 == NULL || saidx1 == NULL) 4037 return 0; 4038 4039 if (saidx0->proto != saidx1->proto) 4040 return 0; 4041 4042 if (flag == CMP_EXACTLY) { 4043 if (saidx0->mode != saidx1->mode) 4044 return 0; 4045 if (saidx0->reqid != saidx1->reqid) 4046 return 0; 4047 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4048 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4049 return 0; 4050 } else { 4051 4052 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4053 if (flag == CMP_MODE_REQID 4054 ||flag == CMP_REQID) { 4055 /* 4056 * If reqid of SPD is non-zero, unique SA is required. 4057 * The result must be of same reqid in this case. 4058 */ 4059 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4060 return 0; 4061 } 4062 4063 if (flag == CMP_MODE_REQID) { 4064 if (saidx0->mode != IPSEC_MODE_ANY 4065 && saidx0->mode != saidx1->mode) 4066 return 0; 4067 } 4068 4069#ifdef IPSEC_NAT_T 4070 /* 4071 * If NAT-T is enabled, check ports for tunnel mode. 4072 * Do not check ports if they are set to zero in the SPD. 4073 * Also do not do it for transport mode, as there is no 4074 * port information available in the SP. 4075 */ 4076 if (saidx1->mode == IPSEC_MODE_TUNNEL && 4077 saidx1->src.sa.sa_family == AF_INET && 4078 saidx1->dst.sa.sa_family == AF_INET && 4079 ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4080 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) 4081 chkport = 1; 4082#endif /* IPSEC_NAT_T */ 4083 4084 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4085 return 0; 4086 } 4087 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4088 return 0; 4089 } 4090 } 4091 4092 return 1; 4093} 4094 4095/* 4096 * compare two secindex structure exactly. 4097 * IN: 4098 * spidx0: source, it is often in SPD. 4099 * spidx1: object, it is often from PFKEY message. 4100 * OUT: 4101 * 1 : equal 4102 * 0 : not equal 4103 */ 4104static int 4105key_cmpspidx_exactly( 4106 struct secpolicyindex *spidx0, 4107 struct secpolicyindex *spidx1) 4108{ 4109 /* sanity */ 4110 if (spidx0 == NULL && spidx1 == NULL) 4111 return 1; 4112 4113 if (spidx0 == NULL || spidx1 == NULL) 4114 return 0; 4115 4116 if (spidx0->prefs != spidx1->prefs 4117 || spidx0->prefd != spidx1->prefd 4118 || spidx0->ul_proto != spidx1->ul_proto) 4119 return 0; 4120 4121 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4122 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4123} 4124 4125/* 4126 * compare two secindex structure with mask. 4127 * IN: 4128 * spidx0: source, it is often in SPD. 4129 * spidx1: object, it is often from IP header. 4130 * OUT: 4131 * 1 : equal 4132 * 0 : not equal 4133 */ 4134static int 4135key_cmpspidx_withmask( 4136 struct secpolicyindex *spidx0, 4137 struct secpolicyindex *spidx1) 4138{ 4139 /* sanity */ 4140 if (spidx0 == NULL && spidx1 == NULL) 4141 return 1; 4142 4143 if (spidx0 == NULL || spidx1 == NULL) 4144 return 0; 4145 4146 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4147 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4148 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4149 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4150 return 0; 4151 4152 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4153 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4154 && spidx0->ul_proto != spidx1->ul_proto) 4155 return 0; 4156 4157 switch (spidx0->src.sa.sa_family) { 4158 case AF_INET: 4159 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4160 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4161 return 0; 4162 if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4163 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4164 return 0; 4165 break; 4166 case AF_INET6: 4167 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4168 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4169 return 0; 4170 /* 4171 * scope_id check. if sin6_scope_id is 0, we regard it 4172 * as a wildcard scope, which matches any scope zone ID. 4173 */ 4174 if (spidx0->src.sin6.sin6_scope_id && 4175 spidx1->src.sin6.sin6_scope_id && 4176 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4177 return 0; 4178 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4179 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4180 return 0; 4181 break; 4182 default: 4183 /* XXX */ 4184 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4185 return 0; 4186 break; 4187 } 4188 4189 switch (spidx0->dst.sa.sa_family) { 4190 case AF_INET: 4191 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4192 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4193 return 0; 4194 if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4195 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4196 return 0; 4197 break; 4198 case AF_INET6: 4199 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4200 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4201 return 0; 4202 /* 4203 * scope_id check. if sin6_scope_id is 0, we regard it 4204 * as a wildcard scope, which matches any scope zone ID. 4205 */ 4206 if (spidx0->dst.sin6.sin6_scope_id && 4207 spidx1->dst.sin6.sin6_scope_id && 4208 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4209 return 0; 4210 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4211 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4212 return 0; 4213 break; 4214 default: 4215 /* XXX */ 4216 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4217 return 0; 4218 break; 4219 } 4220 4221 /* XXX Do we check other field ? e.g. flowinfo */ 4222 4223 return 1; 4224} 4225 4226/* returns 0 on match */ 4227static int 4228key_sockaddrcmp( 4229 const struct sockaddr *sa1, 4230 const struct sockaddr *sa2, 4231 int port) 4232{ 4233#ifdef satosin 4234#undef satosin 4235#endif 4236#define satosin(s) ((const struct sockaddr_in *)s) 4237#ifdef satosin6 4238#undef satosin6 4239#endif 4240#define satosin6(s) ((const struct sockaddr_in6 *)s) 4241 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4242 return 1; 4243 4244 switch (sa1->sa_family) { 4245 case AF_INET: 4246 if (sa1->sa_len != sizeof(struct sockaddr_in)) 4247 return 1; 4248 if (satosin(sa1)->sin_addr.s_addr != 4249 satosin(sa2)->sin_addr.s_addr) { 4250 return 1; 4251 } 4252 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4253 return 1; 4254 break; 4255 case AF_INET6: 4256 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4257 return 1; /*EINVAL*/ 4258 if (satosin6(sa1)->sin6_scope_id != 4259 satosin6(sa2)->sin6_scope_id) { 4260 return 1; 4261 } 4262 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4263 &satosin6(sa2)->sin6_addr)) { 4264 return 1; 4265 } 4266 if (port && 4267 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4268 return 1; 4269 } 4270 break; 4271 default: 4272 if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4273 return 1; 4274 break; 4275 } 4276 4277 return 0; 4278#undef satosin 4279#undef satosin6 4280} 4281 4282/* 4283 * compare two buffers with mask. 4284 * IN: 4285 * addr1: source 4286 * addr2: object 4287 * bits: Number of bits to compare 4288 * OUT: 4289 * 1 : equal 4290 * 0 : not equal 4291 */ 4292static int 4293key_bbcmp(const void *a1, const void *a2, u_int bits) 4294{ 4295 const unsigned char *p1 = a1; 4296 const unsigned char *p2 = a2; 4297 4298 /* XXX: This could be considerably faster if we compare a word 4299 * at a time, but it is complicated on LSB Endian machines */ 4300 4301 /* Handle null pointers */ 4302 if (p1 == NULL || p2 == NULL) 4303 return (p1 == p2); 4304 4305 while (bits >= 8) { 4306 if (*p1++ != *p2++) 4307 return 0; 4308 bits -= 8; 4309 } 4310 4311 if (bits > 0) { 4312 u_int8_t mask = ~((1<<(8-bits))-1); 4313 if ((*p1 & mask) != (*p2 & mask)) 4314 return 0; 4315 } 4316 return 1; /* Match! */ 4317} 4318 4319static void 4320key_flush_spd(time_t now) 4321{ 4322 INIT_VNET_IPSEC(curvnet); 4323 static u_int16_t sptree_scangen = 0; 4324 u_int16_t gen = sptree_scangen++; 4325 struct secpolicy *sp; 4326 u_int dir; 4327 4328 /* SPD */ 4329 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4330restart: 4331 SPTREE_LOCK(); 4332 LIST_FOREACH(sp, &V_sptree[dir], chain) { 4333 if (sp->scangen == gen) /* previously handled */ 4334 continue; 4335 sp->scangen = gen; 4336 if (sp->state == IPSEC_SPSTATE_DEAD && 4337 sp->refcnt == 1) { 4338 /* 4339 * Ensure that we only decrease refcnt once, 4340 * when we're the last consumer. 4341 * Directly call SP_DELREF/key_delsp instead 4342 * of KEY_FREESP to avoid unlocking/relocking 4343 * SPTREE_LOCK before key_delsp: may refcnt 4344 * be increased again during that time ? 4345 * NB: also clean entries created by 4346 * key_spdflush 4347 */ 4348 SP_DELREF(sp); 4349 key_delsp(sp); 4350 SPTREE_UNLOCK(); 4351 goto restart; 4352 } 4353 if (sp->lifetime == 0 && sp->validtime == 0) 4354 continue; 4355 if ((sp->lifetime && now - sp->created > sp->lifetime) 4356 || (sp->validtime && now - sp->lastused > sp->validtime)) { 4357 sp->state = IPSEC_SPSTATE_DEAD; 4358 SPTREE_UNLOCK(); 4359 key_spdexpire(sp); 4360 goto restart; 4361 } 4362 } 4363 SPTREE_UNLOCK(); 4364 } 4365} 4366 4367static void 4368key_flush_sad(time_t now) 4369{ 4370 INIT_VNET_IPSEC(curvnet); 4371 struct secashead *sah, *nextsah; 4372 struct secasvar *sav, *nextsav; 4373 4374 /* SAD */ 4375 SAHTREE_LOCK(); 4376 LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { 4377 /* if sah has been dead, then delete it and process next sah. */ 4378 if (sah->state == SADB_SASTATE_DEAD) { 4379 key_delsah(sah); 4380 continue; 4381 } 4382 4383 /* if LARVAL entry doesn't become MATURE, delete it. */ 4384 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4385 /* Need to also check refcnt for a larval SA ??? */ 4386 if (now - sav->created > V_key_larval_lifetime) 4387 KEY_FREESAV(&sav); 4388 } 4389 4390 /* 4391 * check MATURE entry to start to send expire message 4392 * whether or not. 4393 */ 4394 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4395 /* we don't need to check. */ 4396 if (sav->lft_s == NULL) 4397 continue; 4398 4399 /* sanity check */ 4400 if (sav->lft_c == NULL) { 4401 ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4402 "time, why?\n", __func__)); 4403 continue; 4404 } 4405 4406 /* check SOFT lifetime */ 4407 if (sav->lft_s->addtime != 0 && 4408 now - sav->created > sav->lft_s->addtime) { 4409 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4410 /* 4411 * Actually, only send expire message if 4412 * SA has been used, as it was done before, 4413 * but should we always send such message, 4414 * and let IKE daemon decide if it should be 4415 * renegotiated or not ? 4416 * XXX expire message will actually NOT be 4417 * sent if SA is only used after soft 4418 * lifetime has been reached, see below 4419 * (DYING state) 4420 */ 4421 if (sav->lft_c->usetime != 0) 4422 key_expire(sav); 4423 } 4424 /* check SOFT lifetime by bytes */ 4425 /* 4426 * XXX I don't know the way to delete this SA 4427 * when new SA is installed. Caution when it's 4428 * installed too big lifetime by time. 4429 */ 4430 else if (sav->lft_s->bytes != 0 && 4431 sav->lft_s->bytes < sav->lft_c->bytes) { 4432 4433 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4434 /* 4435 * XXX If we keep to send expire 4436 * message in the status of 4437 * DYING. Do remove below code. 4438 */ 4439 key_expire(sav); 4440 } 4441 } 4442 4443 /* check DYING entry to change status to DEAD. */ 4444 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4445 /* we don't need to check. */ 4446 if (sav->lft_h == NULL) 4447 continue; 4448 4449 /* sanity check */ 4450 if (sav->lft_c == NULL) { 4451 ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4452 "time, why?\n", __func__)); 4453 continue; 4454 } 4455 4456 if (sav->lft_h->addtime != 0 && 4457 now - sav->created > sav->lft_h->addtime) { 4458 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4459 KEY_FREESAV(&sav); 4460 } 4461#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4462 else if (sav->lft_s != NULL 4463 && sav->lft_s->addtime != 0 4464 && now - sav->created > sav->lft_s->addtime) { 4465 /* 4466 * XXX: should be checked to be 4467 * installed the valid SA. 4468 */ 4469 4470 /* 4471 * If there is no SA then sending 4472 * expire message. 4473 */ 4474 key_expire(sav); 4475 } 4476#endif 4477 /* check HARD lifetime by bytes */ 4478 else if (sav->lft_h->bytes != 0 && 4479 sav->lft_h->bytes < sav->lft_c->bytes) { 4480 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4481 KEY_FREESAV(&sav); 4482 } 4483 } 4484 4485 /* delete entry in DEAD */ 4486 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4487 /* sanity check */ 4488 if (sav->state != SADB_SASTATE_DEAD) { 4489 ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4490 "(queue: %d SA: %d): kill it anyway\n", 4491 __func__, 4492 SADB_SASTATE_DEAD, sav->state)); 4493 } 4494 /* 4495 * do not call key_freesav() here. 4496 * sav should already be freed, and sav->refcnt 4497 * shows other references to sav 4498 * (such as from SPD). 4499 */ 4500 } 4501 } 4502 SAHTREE_UNLOCK(); 4503} 4504 4505static void 4506key_flush_acq(time_t now) 4507{ 4508 INIT_VNET_IPSEC(curvnet); 4509 struct secacq *acq, *nextacq; 4510 4511 /* ACQ tree */ 4512 ACQ_LOCK(); 4513 for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 4514 nextacq = LIST_NEXT(acq, chain); 4515 if (now - acq->created > V_key_blockacq_lifetime 4516 && __LIST_CHAINED(acq)) { 4517 LIST_REMOVE(acq, chain); 4518 free(acq, M_IPSEC_SAQ); 4519 } 4520 } 4521 ACQ_UNLOCK(); 4522} 4523 4524static void 4525key_flush_spacq(time_t now) 4526{ 4527 INIT_VNET_IPSEC(curvnet); 4528 struct secspacq *acq, *nextacq; 4529 4530 /* SP ACQ tree */ 4531 SPACQ_LOCK(); 4532 for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 4533 nextacq = LIST_NEXT(acq, chain); 4534 if (now - acq->created > V_key_blockacq_lifetime 4535 && __LIST_CHAINED(acq)) { 4536 LIST_REMOVE(acq, chain); 4537 free(acq, M_IPSEC_SAQ); 4538 } 4539 } 4540 SPACQ_UNLOCK(); 4541} 4542 4543/* 4544 * time handler. 4545 * scanning SPD and SAD to check status for each entries, 4546 * and do to remove or to expire. 4547 * XXX: year 2038 problem may remain. 4548 */ 4549void 4550key_timehandler(void) 4551{ 4552 VNET_ITERATOR_DECL(vnet_iter); 4553 time_t now = time_second; 4554 4555 VNET_LIST_RLOCK(); 4556 VNET_FOREACH(vnet_iter) { 4557 CURVNET_SET(vnet_iter); 4558 key_flush_spd(now); 4559 key_flush_sad(now); 4560 key_flush_acq(now); 4561 key_flush_spacq(now); 4562 CURVNET_RESTORE(); 4563 } 4564 VNET_LIST_RUNLOCK(); 4565 4566#ifndef IPSEC_DEBUG2 4567 /* do exchange to tick time !! */ 4568 (void)timeout((void *)key_timehandler, (void *)0, hz); 4569#endif /* IPSEC_DEBUG2 */ 4570} 4571 4572u_long 4573key_random() 4574{ 4575 u_long value; 4576 4577 key_randomfill(&value, sizeof(value)); 4578 return value; 4579} 4580 4581void 4582key_randomfill(p, l) 4583 void *p; 4584 size_t l; 4585{ 4586 size_t n; 4587 u_long v; 4588 static int warn = 1; 4589 4590 n = 0; 4591 n = (size_t)read_random(p, (u_int)l); 4592 /* last resort */ 4593 while (n < l) { 4594 v = random(); 4595 bcopy(&v, (u_int8_t *)p + n, 4596 l - n < sizeof(v) ? l - n : sizeof(v)); 4597 n += sizeof(v); 4598 4599 if (warn) { 4600 printf("WARNING: pseudo-random number generator " 4601 "used for IPsec processing\n"); 4602 warn = 0; 4603 } 4604 } 4605} 4606 4607/* 4608 * map SADB_SATYPE_* to IPPROTO_*. 4609 * if satype == SADB_SATYPE then satype is mapped to ~0. 4610 * OUT: 4611 * 0: invalid satype. 4612 */ 4613static u_int16_t 4614key_satype2proto(u_int8_t satype) 4615{ 4616 switch (satype) { 4617 case SADB_SATYPE_UNSPEC: 4618 return IPSEC_PROTO_ANY; 4619 case SADB_SATYPE_AH: 4620 return IPPROTO_AH; 4621 case SADB_SATYPE_ESP: 4622 return IPPROTO_ESP; 4623 case SADB_X_SATYPE_IPCOMP: 4624 return IPPROTO_IPCOMP; 4625 case SADB_X_SATYPE_TCPSIGNATURE: 4626 return IPPROTO_TCP; 4627 default: 4628 return 0; 4629 } 4630 /* NOTREACHED */ 4631} 4632 4633/* 4634 * map IPPROTO_* to SADB_SATYPE_* 4635 * OUT: 4636 * 0: invalid protocol type. 4637 */ 4638static u_int8_t 4639key_proto2satype(u_int16_t proto) 4640{ 4641 switch (proto) { 4642 case IPPROTO_AH: 4643 return SADB_SATYPE_AH; 4644 case IPPROTO_ESP: 4645 return SADB_SATYPE_ESP; 4646 case IPPROTO_IPCOMP: 4647 return SADB_X_SATYPE_IPCOMP; 4648 case IPPROTO_TCP: 4649 return SADB_X_SATYPE_TCPSIGNATURE; 4650 default: 4651 return 0; 4652 } 4653 /* NOTREACHED */ 4654} 4655 4656/* %%% PF_KEY */ 4657/* 4658 * SADB_GETSPI processing is to receive 4659 * <base, (SA2), src address, dst address, (SPI range)> 4660 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4661 * tree with the status of LARVAL, and send 4662 * <base, SA(*), address(SD)> 4663 * to the IKMPd. 4664 * 4665 * IN: mhp: pointer to the pointer to each header. 4666 * OUT: NULL if fail. 4667 * other if success, return pointer to the message to send. 4668 */ 4669static int 4670key_getspi(so, m, mhp) 4671 struct socket *so; 4672 struct mbuf *m; 4673 const struct sadb_msghdr *mhp; 4674{ 4675 INIT_VNET_IPSEC(curvnet); 4676 struct sadb_address *src0, *dst0; 4677 struct secasindex saidx; 4678 struct secashead *newsah; 4679 struct secasvar *newsav; 4680 u_int8_t proto; 4681 u_int32_t spi; 4682 u_int8_t mode; 4683 u_int32_t reqid; 4684 int error; 4685 4686 IPSEC_ASSERT(so != NULL, ("null socket")); 4687 IPSEC_ASSERT(m != NULL, ("null mbuf")); 4688 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4689 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4690 4691 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4692 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4693 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4694 __func__)); 4695 return key_senderror(so, m, EINVAL); 4696 } 4697 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4698 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4699 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4700 __func__)); 4701 return key_senderror(so, m, EINVAL); 4702 } 4703 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4704 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4705 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4706 } else { 4707 mode = IPSEC_MODE_ANY; 4708 reqid = 0; 4709 } 4710 4711 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4712 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4713 4714 /* map satype to proto */ 4715 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4716 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4717 __func__)); 4718 return key_senderror(so, m, EINVAL); 4719 } 4720 4721 /* 4722 * Make sure the port numbers are zero. 4723 * In case of NAT-T we will update them later if needed. 4724 */ 4725 switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4726 case AF_INET: 4727 if (((struct sockaddr *)(src0 + 1))->sa_len != 4728 sizeof(struct sockaddr_in)) 4729 return key_senderror(so, m, EINVAL); 4730 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4731 break; 4732 case AF_INET6: 4733 if (((struct sockaddr *)(src0 + 1))->sa_len != 4734 sizeof(struct sockaddr_in6)) 4735 return key_senderror(so, m, EINVAL); 4736 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4737 break; 4738 default: 4739 ; /*???*/ 4740 } 4741 switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4742 case AF_INET: 4743 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4744 sizeof(struct sockaddr_in)) 4745 return key_senderror(so, m, EINVAL); 4746 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4747 break; 4748 case AF_INET6: 4749 if (((struct sockaddr *)(dst0 + 1))->sa_len != 4750 sizeof(struct sockaddr_in6)) 4751 return key_senderror(so, m, EINVAL); 4752 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4753 break; 4754 default: 4755 ; /*???*/ 4756 } 4757 4758 /* XXX boundary check against sa_len */ 4759 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4760 4761#ifdef IPSEC_NAT_T 4762 /* 4763 * Handle NAT-T info if present. 4764 * We made sure the port numbers are zero above, so we do 4765 * not have to worry in case we do not update them. 4766 */ 4767 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 4768 ipseclog((LOG_DEBUG, "%s: NAT-T OAi present\n", __func__)); 4769 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 4770 ipseclog((LOG_DEBUG, "%s: NAT-T OAr present\n", __func__)); 4771 4772 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 4773 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 4774 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 4775 struct sadb_x_nat_t_type *type; 4776 struct sadb_x_nat_t_port *sport, *dport; 4777 4778 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 4779 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 4780 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 4781 ipseclog((LOG_DEBUG, "%s: invalid nat-t message " 4782 "passed.\n", __func__)); 4783 return key_senderror(so, m, EINVAL); 4784 } 4785 4786 sport = (struct sadb_x_nat_t_port *) 4787 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 4788 dport = (struct sadb_x_nat_t_port *) 4789 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 4790 4791 if (sport) 4792 KEY_PORTTOSADDR(&saidx.src, sport->sadb_x_nat_t_port_port); 4793 if (dport) 4794 KEY_PORTTOSADDR(&saidx.dst, dport->sadb_x_nat_t_port_port); 4795 } 4796#endif 4797 4798 /* SPI allocation */ 4799 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4800 &saidx); 4801 if (spi == 0) 4802 return key_senderror(so, m, EINVAL); 4803 4804 /* get a SA index */ 4805 if ((newsah = key_getsah(&saidx)) == NULL) { 4806 /* create a new SA index */ 4807 if ((newsah = key_newsah(&saidx)) == NULL) { 4808 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4809 return key_senderror(so, m, ENOBUFS); 4810 } 4811 } 4812 4813 /* get a new SA */ 4814 /* XXX rewrite */ 4815 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4816 if (newsav == NULL) { 4817 /* XXX don't free new SA index allocated in above. */ 4818 return key_senderror(so, m, error); 4819 } 4820 4821 /* set spi */ 4822 newsav->spi = htonl(spi); 4823 4824 /* delete the entry in acqtree */ 4825 if (mhp->msg->sadb_msg_seq != 0) { 4826 struct secacq *acq; 4827 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4828 /* reset counter in order to deletion by timehandler. */ 4829 acq->created = time_second; 4830 acq->count = 0; 4831 } 4832 } 4833 4834 { 4835 struct mbuf *n, *nn; 4836 struct sadb_sa *m_sa; 4837 struct sadb_msg *newmsg; 4838 int off, len; 4839 4840 /* create new sadb_msg to reply. */ 4841 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4842 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4843 4844 MGETHDR(n, M_DONTWAIT, MT_DATA); 4845 if (len > MHLEN) { 4846 MCLGET(n, M_DONTWAIT); 4847 if ((n->m_flags & M_EXT) == 0) { 4848 m_freem(n); 4849 n = NULL; 4850 } 4851 } 4852 if (!n) 4853 return key_senderror(so, m, ENOBUFS); 4854 4855 n->m_len = len; 4856 n->m_next = NULL; 4857 off = 0; 4858 4859 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4860 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4861 4862 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4863 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4864 m_sa->sadb_sa_exttype = SADB_EXT_SA; 4865 m_sa->sadb_sa_spi = htonl(spi); 4866 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4867 4868 IPSEC_ASSERT(off == len, 4869 ("length inconsistency (off %u len %u)", off, len)); 4870 4871 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4872 SADB_EXT_ADDRESS_DST); 4873 if (!n->m_next) { 4874 m_freem(n); 4875 return key_senderror(so, m, ENOBUFS); 4876 } 4877 4878 if (n->m_len < sizeof(struct sadb_msg)) { 4879 n = m_pullup(n, sizeof(struct sadb_msg)); 4880 if (n == NULL) 4881 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4882 } 4883 4884 n->m_pkthdr.len = 0; 4885 for (nn = n; nn; nn = nn->m_next) 4886 n->m_pkthdr.len += nn->m_len; 4887 4888 newmsg = mtod(n, struct sadb_msg *); 4889 newmsg->sadb_msg_seq = newsav->seq; 4890 newmsg->sadb_msg_errno = 0; 4891 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4892 4893 m_freem(m); 4894 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4895 } 4896} 4897 4898/* 4899 * allocating new SPI 4900 * called by key_getspi(). 4901 * OUT: 4902 * 0: failure. 4903 * others: success. 4904 */ 4905static u_int32_t 4906key_do_getnewspi(spirange, saidx) 4907 struct sadb_spirange *spirange; 4908 struct secasindex *saidx; 4909{ 4910 INIT_VNET_IPSEC(curvnet); 4911 u_int32_t newspi; 4912 u_int32_t min, max; 4913 int count = V_key_spi_trycnt; 4914 4915 /* set spi range to allocate */ 4916 if (spirange != NULL) { 4917 min = spirange->sadb_spirange_min; 4918 max = spirange->sadb_spirange_max; 4919 } else { 4920 min = V_key_spi_minval; 4921 max = V_key_spi_maxval; 4922 } 4923 /* IPCOMP needs 2-byte SPI */ 4924 if (saidx->proto == IPPROTO_IPCOMP) { 4925 u_int32_t t; 4926 if (min >= 0x10000) 4927 min = 0xffff; 4928 if (max >= 0x10000) 4929 max = 0xffff; 4930 if (min > max) { 4931 t = min; min = max; max = t; 4932 } 4933 } 4934 4935 if (min == max) { 4936 if (key_checkspidup(saidx, min) != NULL) { 4937 ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4938 __func__, min)); 4939 return 0; 4940 } 4941 4942 count--; /* taking one cost. */ 4943 newspi = min; 4944 4945 } else { 4946 4947 /* init SPI */ 4948 newspi = 0; 4949 4950 /* when requesting to allocate spi ranged */ 4951 while (count--) { 4952 /* generate pseudo-random SPI value ranged. */ 4953 newspi = min + (key_random() % (max - min + 1)); 4954 4955 if (key_checkspidup(saidx, newspi) == NULL) 4956 break; 4957 } 4958 4959 if (count == 0 || newspi == 0) { 4960 ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4961 __func__)); 4962 return 0; 4963 } 4964 } 4965 4966 /* statistics */ 4967 keystat.getspi_count = 4968 (keystat.getspi_count + V_key_spi_trycnt - count) / 2; 4969 4970 return newspi; 4971} 4972 4973/* 4974 * SADB_UPDATE processing 4975 * receive 4976 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4977 * key(AE), (identity(SD),) (sensitivity)> 4978 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4979 * and send 4980 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4981 * (identity(SD),) (sensitivity)> 4982 * to the ikmpd. 4983 * 4984 * m will always be freed. 4985 */ 4986static int 4987key_update(so, m, mhp) 4988 struct socket *so; 4989 struct mbuf *m; 4990 const struct sadb_msghdr *mhp; 4991{ 4992 INIT_VNET_IPSEC(curvnet); 4993 struct sadb_sa *sa0; 4994 struct sadb_address *src0, *dst0; 4995#ifdef IPSEC_NAT_T 4996 struct sadb_x_nat_t_type *type; 4997 struct sadb_x_nat_t_port *sport, *dport; 4998 struct sadb_address *iaddr, *raddr; 4999 struct sadb_x_nat_t_frag *frag; 5000#endif 5001 struct secasindex saidx; 5002 struct secashead *sah; 5003 struct secasvar *sav; 5004 u_int16_t proto; 5005 u_int8_t mode; 5006 u_int32_t reqid; 5007 int error; 5008 5009 IPSEC_ASSERT(so != NULL, ("null socket")); 5010 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5011 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5012 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5013 5014 /* map satype to proto */ 5015 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5016 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5017 __func__)); 5018 return key_senderror(so, m, EINVAL); 5019 } 5020 5021 if (mhp->ext[SADB_EXT_SA] == NULL || 5022 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5023 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5024 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5025 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5026 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5027 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5028 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5029 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5030 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5031 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5032 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5033 __func__)); 5034 return key_senderror(so, m, EINVAL); 5035 } 5036 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5037 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5038 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5039 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5040 __func__)); 5041 return key_senderror(so, m, EINVAL); 5042 } 5043 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5044 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5045 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5046 } else { 5047 mode = IPSEC_MODE_ANY; 5048 reqid = 0; 5049 } 5050 /* XXX boundary checking for other extensions */ 5051 5052 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5053 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5054 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5055 5056 /* XXX boundary check against sa_len */ 5057 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5058 5059 /* 5060 * Make sure the port numbers are zero. 5061 * In case of NAT-T we will update them later if needed. 5062 */ 5063 KEY_PORTTOSADDR(&saidx.src, 0); 5064 KEY_PORTTOSADDR(&saidx.dst, 0); 5065 5066#ifdef IPSEC_NAT_T 5067 /* 5068 * Handle NAT-T info if present. 5069 */ 5070 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5071 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5072 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5073 5074 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5075 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5076 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5077 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5078 __func__)); 5079 return key_senderror(so, m, EINVAL); 5080 } 5081 5082 type = (struct sadb_x_nat_t_type *) 5083 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5084 sport = (struct sadb_x_nat_t_port *) 5085 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5086 dport = (struct sadb_x_nat_t_port *) 5087 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5088 } else { 5089 type = 0; 5090 sport = dport = 0; 5091 } 5092 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5093 mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5094 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5095 mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5096 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5097 __func__)); 5098 return key_senderror(so, m, EINVAL); 5099 } 5100 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5101 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5102 ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5103 } else { 5104 iaddr = raddr = NULL; 5105 } 5106 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5107 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5108 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5109 __func__)); 5110 return key_senderror(so, m, EINVAL); 5111 } 5112 frag = (struct sadb_x_nat_t_frag *) 5113 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5114 } else { 5115 frag = 0; 5116 } 5117#endif 5118 5119 /* get a SA header */ 5120 if ((sah = key_getsah(&saidx)) == NULL) { 5121 ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 5122 return key_senderror(so, m, ENOENT); 5123 } 5124 5125 /* set spidx if there */ 5126 /* XXX rewrite */ 5127 error = key_setident(sah, m, mhp); 5128 if (error) 5129 return key_senderror(so, m, error); 5130 5131 /* find a SA with sequence number. */ 5132#ifdef IPSEC_DOSEQCHECK 5133 if (mhp->msg->sadb_msg_seq != 0 5134 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5135 ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 5136 "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 5137 return key_senderror(so, m, ENOENT); 5138 } 5139#else 5140 SAHTREE_LOCK(); 5141 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5142 SAHTREE_UNLOCK(); 5143 if (sav == NULL) { 5144 ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 5145 __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5146 return key_senderror(so, m, EINVAL); 5147 } 5148#endif 5149 5150 /* validity check */ 5151 if (sav->sah->saidx.proto != proto) { 5152 ipseclog((LOG_DEBUG, "%s: protocol mismatched " 5153 "(DB=%u param=%u)\n", __func__, 5154 sav->sah->saidx.proto, proto)); 5155 return key_senderror(so, m, EINVAL); 5156 } 5157#ifdef IPSEC_DOSEQCHECK 5158 if (sav->spi != sa0->sadb_sa_spi) { 5159 ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 5160 __func__, 5161 (u_int32_t)ntohl(sav->spi), 5162 (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5163 return key_senderror(so, m, EINVAL); 5164 } 5165#endif 5166 if (sav->pid != mhp->msg->sadb_msg_pid) { 5167 ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 5168 __func__, sav->pid, mhp->msg->sadb_msg_pid)); 5169 return key_senderror(so, m, EINVAL); 5170 } 5171 5172 /* copy sav values */ 5173 error = key_setsaval(sav, m, mhp); 5174 if (error) { 5175 KEY_FREESAV(&sav); 5176 return key_senderror(so, m, error); 5177 } 5178 5179 /* check SA values to be mature. */ 5180 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5181 KEY_FREESAV(&sav); 5182 return key_senderror(so, m, 0); 5183 } 5184 5185#ifdef IPSEC_NAT_T 5186 /* 5187 * Handle more NAT-T info if present, 5188 * now that we have a sav to fill. 5189 */ 5190 if (type) 5191 sav->natt_type = type->sadb_x_nat_t_type_type; 5192 5193 if (sport) 5194 KEY_PORTTOSADDR(&sav->sah->saidx.src, 5195 sport->sadb_x_nat_t_port_port); 5196 if (dport) 5197 KEY_PORTTOSADDR(&sav->sah->saidx.dst, 5198 dport->sadb_x_nat_t_port_port); 5199 5200#if 0 5201 /* 5202 * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5203 * We should actually check for a minimum MTU here, if we 5204 * want to support it in ip_output. 5205 */ 5206 if (frag) 5207 sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5208#endif 5209#endif 5210 5211 { 5212 struct mbuf *n; 5213 5214 /* set msg buf from mhp */ 5215 n = key_getmsgbuf_x1(m, mhp); 5216 if (n == NULL) { 5217 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5218 return key_senderror(so, m, ENOBUFS); 5219 } 5220 5221 m_freem(m); 5222 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5223 } 5224} 5225 5226/* 5227 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5228 * only called by key_update(). 5229 * OUT: 5230 * NULL : not found 5231 * others : found, pointer to a SA. 5232 */ 5233#ifdef IPSEC_DOSEQCHECK 5234static struct secasvar * 5235key_getsavbyseq(sah, seq) 5236 struct secashead *sah; 5237 u_int32_t seq; 5238{ 5239 struct secasvar *sav; 5240 u_int state; 5241 5242 state = SADB_SASTATE_LARVAL; 5243 5244 /* search SAD with sequence number ? */ 5245 LIST_FOREACH(sav, &sah->savtree[state], chain) { 5246 5247 KEY_CHKSASTATE(state, sav->state, __func__); 5248 5249 if (sav->seq == seq) { 5250 sa_addref(sav); 5251 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5252 printf("DP %s cause refcnt++:%d SA:%p\n", 5253 __func__, sav->refcnt, sav)); 5254 return sav; 5255 } 5256 } 5257 5258 return NULL; 5259} 5260#endif 5261 5262/* 5263 * SADB_ADD processing 5264 * add an entry to SA database, when received 5265 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5266 * key(AE), (identity(SD),) (sensitivity)> 5267 * from the ikmpd, 5268 * and send 5269 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5270 * (identity(SD),) (sensitivity)> 5271 * to the ikmpd. 5272 * 5273 * IGNORE identity and sensitivity messages. 5274 * 5275 * m will always be freed. 5276 */ 5277static int 5278key_add(so, m, mhp) 5279 struct socket *so; 5280 struct mbuf *m; 5281 const struct sadb_msghdr *mhp; 5282{ 5283 INIT_VNET_IPSEC(curvnet); 5284 struct sadb_sa *sa0; 5285 struct sadb_address *src0, *dst0; 5286#ifdef IPSEC_NAT_T 5287 struct sadb_x_nat_t_type *type; 5288 struct sadb_address *iaddr, *raddr; 5289 struct sadb_x_nat_t_frag *frag; 5290#endif 5291 struct secasindex saidx; 5292 struct secashead *newsah; 5293 struct secasvar *newsav; 5294 u_int16_t proto; 5295 u_int8_t mode; 5296 u_int32_t reqid; 5297 int error; 5298 5299 IPSEC_ASSERT(so != NULL, ("null socket")); 5300 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5301 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5302 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5303 5304 /* map satype to proto */ 5305 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5306 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5307 __func__)); 5308 return key_senderror(so, m, EINVAL); 5309 } 5310 5311 if (mhp->ext[SADB_EXT_SA] == NULL || 5312 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5313 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5314 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5315 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5316 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5317 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5318 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5319 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5320 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5321 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5322 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5323 __func__)); 5324 return key_senderror(so, m, EINVAL); 5325 } 5326 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5327 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5328 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5329 /* XXX need more */ 5330 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5331 __func__)); 5332 return key_senderror(so, m, EINVAL); 5333 } 5334 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5335 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5336 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5337 } else { 5338 mode = IPSEC_MODE_ANY; 5339 reqid = 0; 5340 } 5341 5342 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5343 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5344 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5345 5346 /* XXX boundary check against sa_len */ 5347 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5348 5349 /* 5350 * Make sure the port numbers are zero. 5351 * In case of NAT-T we will update them later if needed. 5352 */ 5353 KEY_PORTTOSADDR(&saidx.src, 0); 5354 KEY_PORTTOSADDR(&saidx.dst, 0); 5355 5356#ifdef IPSEC_NAT_T 5357 /* 5358 * Handle NAT-T info if present. 5359 */ 5360 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5361 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5362 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5363 struct sadb_x_nat_t_port *sport, *dport; 5364 5365 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5366 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5367 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5368 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5369 __func__)); 5370 return key_senderror(so, m, EINVAL); 5371 } 5372 5373 type = (struct sadb_x_nat_t_type *) 5374 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5375 sport = (struct sadb_x_nat_t_port *) 5376 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5377 dport = (struct sadb_x_nat_t_port *) 5378 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5379 5380 if (sport) 5381 KEY_PORTTOSADDR(&saidx.src, 5382 sport->sadb_x_nat_t_port_port); 5383 if (dport) 5384 KEY_PORTTOSADDR(&saidx.dst, 5385 dport->sadb_x_nat_t_port_port); 5386 } else { 5387 type = 0; 5388 } 5389 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5390 mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5391 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5392 mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5393 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5394 __func__)); 5395 return key_senderror(so, m, EINVAL); 5396 } 5397 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5398 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5399 ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5400 } else { 5401 iaddr = raddr = NULL; 5402 } 5403 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5404 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5405 ipseclog((LOG_DEBUG, "%s: invalid message\n", 5406 __func__)); 5407 return key_senderror(so, m, EINVAL); 5408 } 5409 frag = (struct sadb_x_nat_t_frag *) 5410 mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5411 } else { 5412 frag = 0; 5413 } 5414#endif 5415 5416 /* get a SA header */ 5417 if ((newsah = key_getsah(&saidx)) == NULL) { 5418 /* create a new SA header */ 5419 if ((newsah = key_newsah(&saidx)) == NULL) { 5420 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 5421 return key_senderror(so, m, ENOBUFS); 5422 } 5423 } 5424 5425 /* set spidx if there */ 5426 /* XXX rewrite */ 5427 error = key_setident(newsah, m, mhp); 5428 if (error) { 5429 return key_senderror(so, m, error); 5430 } 5431 5432 /* create new SA entry. */ 5433 /* We can create new SA only if SPI is differenct. */ 5434 SAHTREE_LOCK(); 5435 newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5436 SAHTREE_UNLOCK(); 5437 if (newsav != NULL) { 5438 ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 5439 return key_senderror(so, m, EEXIST); 5440 } 5441 newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5442 if (newsav == NULL) { 5443 return key_senderror(so, m, error); 5444 } 5445 5446 /* check SA values to be mature. */ 5447 if ((error = key_mature(newsav)) != 0) { 5448 KEY_FREESAV(&newsav); 5449 return key_senderror(so, m, error); 5450 } 5451 5452#ifdef IPSEC_NAT_T 5453 /* 5454 * Handle more NAT-T info if present, 5455 * now that we have a sav to fill. 5456 */ 5457 if (type) 5458 newsav->natt_type = type->sadb_x_nat_t_type_type; 5459 5460#if 0 5461 /* 5462 * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5463 * We should actually check for a minimum MTU here, if we 5464 * want to support it in ip_output. 5465 */ 5466 if (frag) 5467 newsav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5468#endif 5469#endif 5470 5471 /* 5472 * don't call key_freesav() here, as we would like to keep the SA 5473 * in the database on success. 5474 */ 5475 5476 { 5477 struct mbuf *n; 5478 5479 /* set msg buf from mhp */ 5480 n = key_getmsgbuf_x1(m, mhp); 5481 if (n == NULL) { 5482 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5483 return key_senderror(so, m, ENOBUFS); 5484 } 5485 5486 m_freem(m); 5487 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5488 } 5489} 5490 5491/* m is retained */ 5492static int 5493key_setident(sah, m, mhp) 5494 struct secashead *sah; 5495 struct mbuf *m; 5496 const struct sadb_msghdr *mhp; 5497{ 5498 INIT_VNET_IPSEC(curvnet); 5499 const struct sadb_ident *idsrc, *iddst; 5500 int idsrclen, iddstlen; 5501 5502 IPSEC_ASSERT(sah != NULL, ("null secashead")); 5503 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5504 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5505 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5506 5507 /* don't make buffer if not there */ 5508 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5509 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5510 sah->idents = NULL; 5511 sah->identd = NULL; 5512 return 0; 5513 } 5514 5515 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5516 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5517 ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 5518 return EINVAL; 5519 } 5520 5521 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5522 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5523 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5524 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5525 5526 /* validity check */ 5527 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5528 ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 5529 return EINVAL; 5530 } 5531 5532 switch (idsrc->sadb_ident_type) { 5533 case SADB_IDENTTYPE_PREFIX: 5534 case SADB_IDENTTYPE_FQDN: 5535 case SADB_IDENTTYPE_USERFQDN: 5536 default: 5537 /* XXX do nothing */ 5538 sah->idents = NULL; 5539 sah->identd = NULL; 5540 return 0; 5541 } 5542 5543 /* make structure */ 5544 sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5545 if (sah->idents == NULL) { 5546 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5547 return ENOBUFS; 5548 } 5549 sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5550 if (sah->identd == NULL) { 5551 free(sah->idents, M_IPSEC_MISC); 5552 sah->idents = NULL; 5553 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5554 return ENOBUFS; 5555 } 5556 sah->idents->type = idsrc->sadb_ident_type; 5557 sah->idents->id = idsrc->sadb_ident_id; 5558 5559 sah->identd->type = iddst->sadb_ident_type; 5560 sah->identd->id = iddst->sadb_ident_id; 5561 5562 return 0; 5563} 5564 5565/* 5566 * m will not be freed on return. 5567 * it is caller's responsibility to free the result. 5568 */ 5569static struct mbuf * 5570key_getmsgbuf_x1(m, mhp) 5571 struct mbuf *m; 5572 const struct sadb_msghdr *mhp; 5573{ 5574 struct mbuf *n; 5575 5576 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5577 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5578 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5579 5580 /* create new sadb_msg to reply. */ 5581 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5582 SADB_EXT_SA, SADB_X_EXT_SA2, 5583 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5584 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5585 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5586 if (!n) 5587 return NULL; 5588 5589 if (n->m_len < sizeof(struct sadb_msg)) { 5590 n = m_pullup(n, sizeof(struct sadb_msg)); 5591 if (n == NULL) 5592 return NULL; 5593 } 5594 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5595 mtod(n, struct sadb_msg *)->sadb_msg_len = 5596 PFKEY_UNIT64(n->m_pkthdr.len); 5597 5598 return n; 5599} 5600 5601static int key_delete_all __P((struct socket *, struct mbuf *, 5602 const struct sadb_msghdr *, u_int16_t)); 5603 5604/* 5605 * SADB_DELETE processing 5606 * receive 5607 * <base, SA(*), address(SD)> 5608 * from the ikmpd, and set SADB_SASTATE_DEAD, 5609 * and send, 5610 * <base, SA(*), address(SD)> 5611 * to the ikmpd. 5612 * 5613 * m will always be freed. 5614 */ 5615static int 5616key_delete(so, m, mhp) 5617 struct socket *so; 5618 struct mbuf *m; 5619 const struct sadb_msghdr *mhp; 5620{ 5621 INIT_VNET_IPSEC(curvnet); 5622 struct sadb_sa *sa0; 5623 struct sadb_address *src0, *dst0; 5624 struct secasindex saidx; 5625 struct secashead *sah; 5626 struct secasvar *sav = NULL; 5627 u_int16_t proto; 5628 5629 IPSEC_ASSERT(so != NULL, ("null socket")); 5630 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5631 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5632 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5633 5634 /* map satype to proto */ 5635 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5636 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5637 __func__)); 5638 return key_senderror(so, m, EINVAL); 5639 } 5640 5641 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5642 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5643 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5644 __func__)); 5645 return key_senderror(so, m, EINVAL); 5646 } 5647 5648 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5649 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5650 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5651 __func__)); 5652 return key_senderror(so, m, EINVAL); 5653 } 5654 5655 if (mhp->ext[SADB_EXT_SA] == NULL) { 5656 /* 5657 * Caller wants us to delete all non-LARVAL SAs 5658 * that match the src/dst. This is used during 5659 * IKE INITIAL-CONTACT. 5660 */ 5661 ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5662 return key_delete_all(so, m, mhp, proto); 5663 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5664 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5665 __func__)); 5666 return key_senderror(so, m, EINVAL); 5667 } 5668 5669 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5670 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5671 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5672 5673 /* XXX boundary check against sa_len */ 5674 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5675 5676 /* 5677 * Make sure the port numbers are zero. 5678 * In case of NAT-T we will update them later if needed. 5679 */ 5680 KEY_PORTTOSADDR(&saidx.src, 0); 5681 KEY_PORTTOSADDR(&saidx.dst, 0); 5682 5683#ifdef IPSEC_NAT_T 5684 /* 5685 * Handle NAT-T info if present. 5686 */ 5687 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5688 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5689 struct sadb_x_nat_t_port *sport, *dport; 5690 5691 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5692 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5693 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5694 __func__)); 5695 return key_senderror(so, m, EINVAL); 5696 } 5697 5698 sport = (struct sadb_x_nat_t_port *) 5699 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5700 dport = (struct sadb_x_nat_t_port *) 5701 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5702 5703 if (sport) 5704 KEY_PORTTOSADDR(&saidx.src, 5705 sport->sadb_x_nat_t_port_port); 5706 if (dport) 5707 KEY_PORTTOSADDR(&saidx.dst, 5708 dport->sadb_x_nat_t_port_port); 5709 } 5710#endif 5711 5712 /* get a SA header */ 5713 SAHTREE_LOCK(); 5714 LIST_FOREACH(sah, &V_sahtree, chain) { 5715 if (sah->state == SADB_SASTATE_DEAD) 5716 continue; 5717 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5718 continue; 5719 5720 /* get a SA with SPI. */ 5721 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5722 if (sav) 5723 break; 5724 } 5725 if (sah == NULL) { 5726 SAHTREE_UNLOCK(); 5727 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5728 return key_senderror(so, m, ENOENT); 5729 } 5730 5731 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5732 SAHTREE_UNLOCK(); 5733 KEY_FREESAV(&sav); 5734 5735 { 5736 struct mbuf *n; 5737 struct sadb_msg *newmsg; 5738 5739 /* create new sadb_msg to reply. */ 5740 /* XXX-BZ NAT-T extensions? */ 5741 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5742 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5743 if (!n) 5744 return key_senderror(so, m, ENOBUFS); 5745 5746 if (n->m_len < sizeof(struct sadb_msg)) { 5747 n = m_pullup(n, sizeof(struct sadb_msg)); 5748 if (n == NULL) 5749 return key_senderror(so, m, ENOBUFS); 5750 } 5751 newmsg = mtod(n, struct sadb_msg *); 5752 newmsg->sadb_msg_errno = 0; 5753 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5754 5755 m_freem(m); 5756 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5757 } 5758} 5759 5760/* 5761 * delete all SAs for src/dst. Called from key_delete(). 5762 */ 5763static int 5764key_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, 5765 u_int16_t proto) 5766{ 5767 INIT_VNET_IPSEC(curvnet); 5768 struct sadb_address *src0, *dst0; 5769 struct secasindex saidx; 5770 struct secashead *sah; 5771 struct secasvar *sav, *nextsav; 5772 u_int stateidx, state; 5773 5774 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5775 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5776 5777 /* XXX boundary check against sa_len */ 5778 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5779 5780 /* 5781 * Make sure the port numbers are zero. 5782 * In case of NAT-T we will update them later if needed. 5783 */ 5784 KEY_PORTTOSADDR(&saidx.src, 0); 5785 KEY_PORTTOSADDR(&saidx.dst, 0); 5786 5787#ifdef IPSEC_NAT_T 5788 /* 5789 * Handle NAT-T info if present. 5790 */ 5791 5792 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5793 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5794 struct sadb_x_nat_t_port *sport, *dport; 5795 5796 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5797 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5798 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5799 __func__)); 5800 return key_senderror(so, m, EINVAL); 5801 } 5802 5803 sport = (struct sadb_x_nat_t_port *) 5804 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5805 dport = (struct sadb_x_nat_t_port *) 5806 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5807 5808 if (sport) 5809 KEY_PORTTOSADDR(&saidx.src, 5810 sport->sadb_x_nat_t_port_port); 5811 if (dport) 5812 KEY_PORTTOSADDR(&saidx.dst, 5813 dport->sadb_x_nat_t_port_port); 5814 } 5815#endif 5816 5817 SAHTREE_LOCK(); 5818 LIST_FOREACH(sah, &V_sahtree, chain) { 5819 if (sah->state == SADB_SASTATE_DEAD) 5820 continue; 5821 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5822 continue; 5823 5824 /* Delete all non-LARVAL SAs. */ 5825 for (stateidx = 0; 5826 stateidx < _ARRAYLEN(saorder_state_alive); 5827 stateidx++) { 5828 state = saorder_state_alive[stateidx]; 5829 if (state == SADB_SASTATE_LARVAL) 5830 continue; 5831 for (sav = LIST_FIRST(&sah->savtree[state]); 5832 sav != NULL; sav = nextsav) { 5833 nextsav = LIST_NEXT(sav, chain); 5834 /* sanity check */ 5835 if (sav->state != state) { 5836 ipseclog((LOG_DEBUG, "%s: invalid " 5837 "sav->state (queue %d SA %d)\n", 5838 __func__, state, sav->state)); 5839 continue; 5840 } 5841 5842 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5843 KEY_FREESAV(&sav); 5844 } 5845 } 5846 } 5847 SAHTREE_UNLOCK(); 5848 { 5849 struct mbuf *n; 5850 struct sadb_msg *newmsg; 5851 5852 /* create new sadb_msg to reply. */ 5853 /* XXX-BZ NAT-T extensions? */ 5854 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5855 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5856 if (!n) 5857 return key_senderror(so, m, ENOBUFS); 5858 5859 if (n->m_len < sizeof(struct sadb_msg)) { 5860 n = m_pullup(n, sizeof(struct sadb_msg)); 5861 if (n == NULL) 5862 return key_senderror(so, m, ENOBUFS); 5863 } 5864 newmsg = mtod(n, struct sadb_msg *); 5865 newmsg->sadb_msg_errno = 0; 5866 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5867 5868 m_freem(m); 5869 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5870 } 5871} 5872 5873/* 5874 * SADB_GET processing 5875 * receive 5876 * <base, SA(*), address(SD)> 5877 * from the ikmpd, and get a SP and a SA to respond, 5878 * and send, 5879 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5880 * (identity(SD),) (sensitivity)> 5881 * to the ikmpd. 5882 * 5883 * m will always be freed. 5884 */ 5885static int 5886key_get(so, m, mhp) 5887 struct socket *so; 5888 struct mbuf *m; 5889 const struct sadb_msghdr *mhp; 5890{ 5891 INIT_VNET_IPSEC(curvnet); 5892 struct sadb_sa *sa0; 5893 struct sadb_address *src0, *dst0; 5894 struct secasindex saidx; 5895 struct secashead *sah; 5896 struct secasvar *sav = NULL; 5897 u_int16_t proto; 5898 5899 IPSEC_ASSERT(so != NULL, ("null socket")); 5900 IPSEC_ASSERT(m != NULL, ("null mbuf")); 5901 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5902 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5903 5904 /* map satype to proto */ 5905 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5906 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5907 __func__)); 5908 return key_senderror(so, m, EINVAL); 5909 } 5910 5911 if (mhp->ext[SADB_EXT_SA] == NULL || 5912 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5913 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5914 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5915 __func__)); 5916 return key_senderror(so, m, EINVAL); 5917 } 5918 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5919 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5920 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5921 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5922 __func__)); 5923 return key_senderror(so, m, EINVAL); 5924 } 5925 5926 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5927 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5928 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5929 5930 /* XXX boundary check against sa_len */ 5931 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5932 5933 /* 5934 * Make sure the port numbers are zero. 5935 * In case of NAT-T we will update them later if needed. 5936 */ 5937 KEY_PORTTOSADDR(&saidx.src, 0); 5938 KEY_PORTTOSADDR(&saidx.dst, 0); 5939 5940#ifdef IPSEC_NAT_T 5941 /* 5942 * Handle NAT-T info if present. 5943 */ 5944 5945 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5946 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5947 struct sadb_x_nat_t_port *sport, *dport; 5948 5949 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5950 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5951 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5952 __func__)); 5953 return key_senderror(so, m, EINVAL); 5954 } 5955 5956 sport = (struct sadb_x_nat_t_port *) 5957 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5958 dport = (struct sadb_x_nat_t_port *) 5959 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5960 5961 if (sport) 5962 KEY_PORTTOSADDR(&saidx.src, 5963 sport->sadb_x_nat_t_port_port); 5964 if (dport) 5965 KEY_PORTTOSADDR(&saidx.dst, 5966 dport->sadb_x_nat_t_port_port); 5967 } 5968#endif 5969 5970 /* get a SA header */ 5971 SAHTREE_LOCK(); 5972 LIST_FOREACH(sah, &V_sahtree, chain) { 5973 if (sah->state == SADB_SASTATE_DEAD) 5974 continue; 5975 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5976 continue; 5977 5978 /* get a SA with SPI. */ 5979 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5980 if (sav) 5981 break; 5982 } 5983 SAHTREE_UNLOCK(); 5984 if (sah == NULL) { 5985 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5986 return key_senderror(so, m, ENOENT); 5987 } 5988 5989 { 5990 struct mbuf *n; 5991 u_int8_t satype; 5992 5993 /* map proto to satype */ 5994 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5995 ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5996 __func__)); 5997 return key_senderror(so, m, EINVAL); 5998 } 5999 6000 /* create new sadb_msg to reply. */ 6001 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 6002 mhp->msg->sadb_msg_pid); 6003 if (!n) 6004 return key_senderror(so, m, ENOBUFS); 6005 6006 m_freem(m); 6007 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 6008 } 6009} 6010 6011/* XXX make it sysctl-configurable? */ 6012static void 6013key_getcomb_setlifetime(comb) 6014 struct sadb_comb *comb; 6015{ 6016 6017 comb->sadb_comb_soft_allocations = 1; 6018 comb->sadb_comb_hard_allocations = 1; 6019 comb->sadb_comb_soft_bytes = 0; 6020 comb->sadb_comb_hard_bytes = 0; 6021 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 6022 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 6023 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 6024 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 6025} 6026 6027/* 6028 * XXX reorder combinations by preference 6029 * XXX no idea if the user wants ESP authentication or not 6030 */ 6031static struct mbuf * 6032key_getcomb_esp() 6033{ 6034 INIT_VNET_IPSEC(curvnet); 6035 struct sadb_comb *comb; 6036 struct enc_xform *algo; 6037 struct mbuf *result = NULL, *m, *n; 6038 int encmin; 6039 int i, off, o; 6040 int totlen; 6041 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6042 6043 m = NULL; 6044 for (i = 1; i <= SADB_EALG_MAX; i++) { 6045 algo = esp_algorithm_lookup(i); 6046 if (algo == NULL) 6047 continue; 6048 6049 /* discard algorithms with key size smaller than system min */ 6050 if (_BITS(algo->maxkey) < V_ipsec_esp_keymin) 6051 continue; 6052 if (_BITS(algo->minkey) < V_ipsec_esp_keymin) 6053 encmin = V_ipsec_esp_keymin; 6054 else 6055 encmin = _BITS(algo->minkey); 6056 6057 if (V_ipsec_esp_auth) 6058 m = key_getcomb_ah(); 6059 else { 6060 IPSEC_ASSERT(l <= MLEN, 6061 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6062 MGET(m, M_DONTWAIT, MT_DATA); 6063 if (m) { 6064 M_ALIGN(m, l); 6065 m->m_len = l; 6066 m->m_next = NULL; 6067 bzero(mtod(m, caddr_t), m->m_len); 6068 } 6069 } 6070 if (!m) 6071 goto fail; 6072 6073 totlen = 0; 6074 for (n = m; n; n = n->m_next) 6075 totlen += n->m_len; 6076 IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 6077 6078 for (off = 0; off < totlen; off += l) { 6079 n = m_pulldown(m, off, l, &o); 6080 if (!n) { 6081 /* m is already freed */ 6082 goto fail; 6083 } 6084 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 6085 bzero(comb, sizeof(*comb)); 6086 key_getcomb_setlifetime(comb); 6087 comb->sadb_comb_encrypt = i; 6088 comb->sadb_comb_encrypt_minbits = encmin; 6089 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6090 } 6091 6092 if (!result) 6093 result = m; 6094 else 6095 m_cat(result, m); 6096 } 6097 6098 return result; 6099 6100 fail: 6101 if (result) 6102 m_freem(result); 6103 return NULL; 6104} 6105 6106static void 6107key_getsizes_ah( 6108 const struct auth_hash *ah, 6109 int alg, 6110 u_int16_t* min, 6111 u_int16_t* max) 6112{ 6113 INIT_VNET_IPSEC(curvnet); 6114 6115 *min = *max = ah->keysize; 6116 if (ah->keysize == 0) { 6117 /* 6118 * Transform takes arbitrary key size but algorithm 6119 * key size is restricted. Enforce this here. 6120 */ 6121 switch (alg) { 6122 case SADB_X_AALG_MD5: *min = *max = 16; break; 6123 case SADB_X_AALG_SHA: *min = *max = 20; break; 6124 case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 6125 default: 6126 DPRINTF(("%s: unknown AH algorithm %u\n", 6127 __func__, alg)); 6128 break; 6129 } 6130 } 6131} 6132 6133/* 6134 * XXX reorder combinations by preference 6135 */ 6136static struct mbuf * 6137key_getcomb_ah() 6138{ 6139 INIT_VNET_IPSEC(curvnet); 6140 struct sadb_comb *comb; 6141 struct auth_hash *algo; 6142 struct mbuf *m; 6143 u_int16_t minkeysize, maxkeysize; 6144 int i; 6145 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6146 6147 m = NULL; 6148 for (i = 1; i <= SADB_AALG_MAX; i++) { 6149#if 1 6150 /* we prefer HMAC algorithms, not old algorithms */ 6151 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 6152 continue; 6153#endif 6154 algo = ah_algorithm_lookup(i); 6155 if (!algo) 6156 continue; 6157 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6158 /* discard algorithms with key size smaller than system min */ 6159 if (_BITS(minkeysize) < V_ipsec_ah_keymin) 6160 continue; 6161 6162 if (!m) { 6163 IPSEC_ASSERT(l <= MLEN, 6164 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6165 MGET(m, M_DONTWAIT, MT_DATA); 6166 if (m) { 6167 M_ALIGN(m, l); 6168 m->m_len = l; 6169 m->m_next = NULL; 6170 } 6171 } else 6172 M_PREPEND(m, l, M_DONTWAIT); 6173 if (!m) 6174 return NULL; 6175 6176 comb = mtod(m, struct sadb_comb *); 6177 bzero(comb, sizeof(*comb)); 6178 key_getcomb_setlifetime(comb); 6179 comb->sadb_comb_auth = i; 6180 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6181 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6182 } 6183 6184 return m; 6185} 6186 6187/* 6188 * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 6189 * XXX reorder combinations by preference 6190 */ 6191static struct mbuf * 6192key_getcomb_ipcomp() 6193{ 6194 struct sadb_comb *comb; 6195 struct comp_algo *algo; 6196 struct mbuf *m; 6197 int i; 6198 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6199 6200 m = NULL; 6201 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6202 algo = ipcomp_algorithm_lookup(i); 6203 if (!algo) 6204 continue; 6205 6206 if (!m) { 6207 IPSEC_ASSERT(l <= MLEN, 6208 ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6209 MGET(m, M_DONTWAIT, MT_DATA); 6210 if (m) { 6211 M_ALIGN(m, l); 6212 m->m_len = l; 6213 m->m_next = NULL; 6214 } 6215 } else 6216 M_PREPEND(m, l, M_DONTWAIT); 6217 if (!m) 6218 return NULL; 6219 6220 comb = mtod(m, struct sadb_comb *); 6221 bzero(comb, sizeof(*comb)); 6222 key_getcomb_setlifetime(comb); 6223 comb->sadb_comb_encrypt = i; 6224 /* what should we set into sadb_comb_*_{min,max}bits? */ 6225 } 6226 6227 return m; 6228} 6229 6230/* 6231 * XXX no way to pass mode (transport/tunnel) to userland 6232 * XXX replay checking? 6233 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6234 */ 6235static struct mbuf * 6236key_getprop(saidx) 6237 const struct secasindex *saidx; 6238{ 6239 struct sadb_prop *prop; 6240 struct mbuf *m, *n; 6241 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6242 int totlen; 6243 6244 switch (saidx->proto) { 6245 case IPPROTO_ESP: 6246 m = key_getcomb_esp(); 6247 break; 6248 case IPPROTO_AH: 6249 m = key_getcomb_ah(); 6250 break; 6251 case IPPROTO_IPCOMP: 6252 m = key_getcomb_ipcomp(); 6253 break; 6254 default: 6255 return NULL; 6256 } 6257 6258 if (!m) 6259 return NULL; 6260 M_PREPEND(m, l, M_DONTWAIT); 6261 if (!m) 6262 return NULL; 6263 6264 totlen = 0; 6265 for (n = m; n; n = n->m_next) 6266 totlen += n->m_len; 6267 6268 prop = mtod(m, struct sadb_prop *); 6269 bzero(prop, sizeof(*prop)); 6270 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6271 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6272 prop->sadb_prop_replay = 32; /* XXX */ 6273 6274 return m; 6275} 6276 6277/* 6278 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6279 * send 6280 * <base, SA, address(SD), (address(P)), x_policy, 6281 * (identity(SD),) (sensitivity,) proposal> 6282 * to KMD, and expect to receive 6283 * <base> with SADB_ACQUIRE if error occured, 6284 * or 6285 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6286 * from KMD by PF_KEY. 6287 * 6288 * XXX x_policy is outside of RFC2367 (KAME extension). 6289 * XXX sensitivity is not supported. 6290 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6291 * see comment for key_getcomb_ipcomp(). 6292 * 6293 * OUT: 6294 * 0 : succeed 6295 * others: error number 6296 */ 6297static int 6298key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6299{ 6300 INIT_VNET_IPSEC(curvnet); 6301 struct mbuf *result = NULL, *m; 6302 struct secacq *newacq; 6303 u_int8_t satype; 6304 int error = -1; 6305 u_int32_t seq; 6306 6307 IPSEC_ASSERT(saidx != NULL, ("null saidx")); 6308 satype = key_proto2satype(saidx->proto); 6309 IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 6310 6311 /* 6312 * We never do anything about acquirng SA. There is anather 6313 * solution that kernel blocks to send SADB_ACQUIRE message until 6314 * getting something message from IKEd. In later case, to be 6315 * managed with ACQUIRING list. 6316 */ 6317 /* Get an entry to check whether sending message or not. */ 6318 if ((newacq = key_getacq(saidx)) != NULL) { 6319 if (V_key_blockacq_count < newacq->count) { 6320 /* reset counter and do send message. */ 6321 newacq->count = 0; 6322 } else { 6323 /* increment counter and do nothing. */ 6324 newacq->count++; 6325 return 0; 6326 } 6327 } else { 6328 /* make new entry for blocking to send SADB_ACQUIRE. */ 6329 if ((newacq = key_newacq(saidx)) == NULL) 6330 return ENOBUFS; 6331 } 6332 6333 6334 seq = newacq->seq; 6335 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6336 if (!m) { 6337 error = ENOBUFS; 6338 goto fail; 6339 } 6340 result = m; 6341 6342 /* 6343 * No SADB_X_EXT_NAT_T_* here: we do not know 6344 * anything related to NAT-T at this time. 6345 */ 6346 6347 /* set sadb_address for saidx's. */ 6348 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6349 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6350 if (!m) { 6351 error = ENOBUFS; 6352 goto fail; 6353 } 6354 m_cat(result, m); 6355 6356 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6357 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6358 if (!m) { 6359 error = ENOBUFS; 6360 goto fail; 6361 } 6362 m_cat(result, m); 6363 6364 /* XXX proxy address (optional) */ 6365 6366 /* set sadb_x_policy */ 6367 if (sp) { 6368 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6369 if (!m) { 6370 error = ENOBUFS; 6371 goto fail; 6372 } 6373 m_cat(result, m); 6374 } 6375 6376 /* XXX identity (optional) */ 6377#if 0 6378 if (idexttype && fqdn) { 6379 /* create identity extension (FQDN) */ 6380 struct sadb_ident *id; 6381 int fqdnlen; 6382 6383 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6384 id = (struct sadb_ident *)p; 6385 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6386 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6387 id->sadb_ident_exttype = idexttype; 6388 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6389 bcopy(fqdn, id + 1, fqdnlen); 6390 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6391 } 6392 6393 if (idexttype) { 6394 /* create identity extension (USERFQDN) */ 6395 struct sadb_ident *id; 6396 int userfqdnlen; 6397 6398 if (userfqdn) { 6399 /* +1 for terminating-NUL */ 6400 userfqdnlen = strlen(userfqdn) + 1; 6401 } else 6402 userfqdnlen = 0; 6403 id = (struct sadb_ident *)p; 6404 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6405 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6406 id->sadb_ident_exttype = idexttype; 6407 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6408 /* XXX is it correct? */ 6409 if (curproc && curproc->p_cred) 6410 id->sadb_ident_id = curproc->p_cred->p_ruid; 6411 if (userfqdn && userfqdnlen) 6412 bcopy(userfqdn, id + 1, userfqdnlen); 6413 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6414 } 6415#endif 6416 6417 /* XXX sensitivity (optional) */ 6418 6419 /* create proposal/combination extension */ 6420 m = key_getprop(saidx); 6421#if 0 6422 /* 6423 * spec conformant: always attach proposal/combination extension, 6424 * the problem is that we have no way to attach it for ipcomp, 6425 * due to the way sadb_comb is declared in RFC2367. 6426 */ 6427 if (!m) { 6428 error = ENOBUFS; 6429 goto fail; 6430 } 6431 m_cat(result, m); 6432#else 6433 /* 6434 * outside of spec; make proposal/combination extension optional. 6435 */ 6436 if (m) 6437 m_cat(result, m); 6438#endif 6439 6440 if ((result->m_flags & M_PKTHDR) == 0) { 6441 error = EINVAL; 6442 goto fail; 6443 } 6444 6445 if (result->m_len < sizeof(struct sadb_msg)) { 6446 result = m_pullup(result, sizeof(struct sadb_msg)); 6447 if (result == NULL) { 6448 error = ENOBUFS; 6449 goto fail; 6450 } 6451 } 6452 6453 result->m_pkthdr.len = 0; 6454 for (m = result; m; m = m->m_next) 6455 result->m_pkthdr.len += m->m_len; 6456 6457 mtod(result, struct sadb_msg *)->sadb_msg_len = 6458 PFKEY_UNIT64(result->m_pkthdr.len); 6459 6460 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6461 6462 fail: 6463 if (result) 6464 m_freem(result); 6465 return error; 6466} 6467 6468static struct secacq * 6469key_newacq(const struct secasindex *saidx) 6470{ 6471 INIT_VNET_IPSEC(curvnet); 6472 struct secacq *newacq; 6473 6474 /* get new entry */ 6475 newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6476 if (newacq == NULL) { 6477 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6478 return NULL; 6479 } 6480 6481 /* copy secindex */ 6482 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6483 newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); 6484 newacq->created = time_second; 6485 newacq->count = 0; 6486 6487 /* add to acqtree */ 6488 ACQ_LOCK(); 6489 LIST_INSERT_HEAD(&V_acqtree, newacq, chain); 6490 ACQ_UNLOCK(); 6491 6492 return newacq; 6493} 6494 6495static struct secacq * 6496key_getacq(const struct secasindex *saidx) 6497{ 6498 INIT_VNET_IPSEC(curvnet); 6499 struct secacq *acq; 6500 6501 ACQ_LOCK(); 6502 LIST_FOREACH(acq, &V_acqtree, chain) { 6503 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6504 break; 6505 } 6506 ACQ_UNLOCK(); 6507 6508 return acq; 6509} 6510 6511static struct secacq * 6512key_getacqbyseq(seq) 6513 u_int32_t seq; 6514{ 6515 INIT_VNET_IPSEC(curvnet); 6516 struct secacq *acq; 6517 6518 ACQ_LOCK(); 6519 LIST_FOREACH(acq, &V_acqtree, chain) { 6520 if (acq->seq == seq) 6521 break; 6522 } 6523 ACQ_UNLOCK(); 6524 6525 return acq; 6526} 6527 6528static struct secspacq * 6529key_newspacq(spidx) 6530 struct secpolicyindex *spidx; 6531{ 6532 INIT_VNET_IPSEC(curvnet); 6533 struct secspacq *acq; 6534 6535 /* get new entry */ 6536 acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6537 if (acq == NULL) { 6538 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6539 return NULL; 6540 } 6541 6542 /* copy secindex */ 6543 bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6544 acq->created = time_second; 6545 acq->count = 0; 6546 6547 /* add to spacqtree */ 6548 SPACQ_LOCK(); 6549 LIST_INSERT_HEAD(&V_spacqtree, acq, chain); 6550 SPACQ_UNLOCK(); 6551 6552 return acq; 6553} 6554 6555static struct secspacq * 6556key_getspacq(spidx) 6557 struct secpolicyindex *spidx; 6558{ 6559 INIT_VNET_IPSEC(curvnet); 6560 struct secspacq *acq; 6561 6562 SPACQ_LOCK(); 6563 LIST_FOREACH(acq, &V_spacqtree, chain) { 6564 if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 6565 /* NB: return holding spacq_lock */ 6566 return acq; 6567 } 6568 } 6569 SPACQ_UNLOCK(); 6570 6571 return NULL; 6572} 6573 6574/* 6575 * SADB_ACQUIRE processing, 6576 * in first situation, is receiving 6577 * <base> 6578 * from the ikmpd, and clear sequence of its secasvar entry. 6579 * 6580 * In second situation, is receiving 6581 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6582 * from a user land process, and return 6583 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6584 * to the socket. 6585 * 6586 * m will always be freed. 6587 */ 6588static int 6589key_acquire2(so, m, mhp) 6590 struct socket *so; 6591 struct mbuf *m; 6592 const struct sadb_msghdr *mhp; 6593{ 6594 INIT_VNET_IPSEC(curvnet); 6595 const struct sadb_address *src0, *dst0; 6596 struct secasindex saidx; 6597 struct secashead *sah; 6598 u_int16_t proto; 6599 int error; 6600 6601 IPSEC_ASSERT(so != NULL, ("null socket")); 6602 IPSEC_ASSERT(m != NULL, ("null mbuf")); 6603 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6604 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6605 6606 /* 6607 * Error message from KMd. 6608 * We assume that if error was occured in IKEd, the length of PFKEY 6609 * message is equal to the size of sadb_msg structure. 6610 * We do not raise error even if error occured in this function. 6611 */ 6612 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6613 struct secacq *acq; 6614 6615 /* check sequence number */ 6616 if (mhp->msg->sadb_msg_seq == 0) { 6617 ipseclog((LOG_DEBUG, "%s: must specify sequence " 6618 "number.\n", __func__)); 6619 m_freem(m); 6620 return 0; 6621 } 6622 6623 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6624 /* 6625 * the specified larval SA is already gone, or we got 6626 * a bogus sequence number. we can silently ignore it. 6627 */ 6628 m_freem(m); 6629 return 0; 6630 } 6631 6632 /* reset acq counter in order to deletion by timehander. */ 6633 acq->created = time_second; 6634 acq->count = 0; 6635 m_freem(m); 6636 return 0; 6637 } 6638 6639 /* 6640 * This message is from user land. 6641 */ 6642 6643 /* map satype to proto */ 6644 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6645 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6646 __func__)); 6647 return key_senderror(so, m, EINVAL); 6648 } 6649 6650 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6651 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6652 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6653 /* error */ 6654 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6655 __func__)); 6656 return key_senderror(so, m, EINVAL); 6657 } 6658 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6659 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6660 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6661 /* error */ 6662 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6663 __func__)); 6664 return key_senderror(so, m, EINVAL); 6665 } 6666 6667 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6668 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6669 6670 /* XXX boundary check against sa_len */ 6671 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6672 6673 /* 6674 * Make sure the port numbers are zero. 6675 * In case of NAT-T we will update them later if needed. 6676 */ 6677 KEY_PORTTOSADDR(&saidx.src, 0); 6678 KEY_PORTTOSADDR(&saidx.dst, 0); 6679 6680#ifndef IPSEC_NAT_T 6681 /* 6682 * Handle NAT-T info if present. 6683 */ 6684 6685 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 6686 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 6687 struct sadb_x_nat_t_port *sport, *dport; 6688 6689 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 6690 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 6691 ipseclog((LOG_DEBUG, "%s: invalid message.\n", 6692 __func__)); 6693 return key_senderror(so, m, EINVAL); 6694 } 6695 6696 sport = (struct sadb_x_nat_t_port *) 6697 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 6698 dport = (struct sadb_x_nat_t_port *) 6699 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 6700 6701 if (sport) 6702 KEY_PORTTOSADDR(&saidx.src, 6703 sport->sadb_x_nat_t_port_port); 6704 if (dport) 6705 KEY_PORTTOSADDR(&saidx.dst, 6706 dport->sadb_x_nat_t_port_port); 6707 } 6708#endif 6709 6710 /* get a SA index */ 6711 SAHTREE_LOCK(); 6712 LIST_FOREACH(sah, &V_sahtree, chain) { 6713 if (sah->state == SADB_SASTATE_DEAD) 6714 continue; 6715 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6716 break; 6717 } 6718 SAHTREE_UNLOCK(); 6719 if (sah != NULL) { 6720 ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 6721 return key_senderror(so, m, EEXIST); 6722 } 6723 6724 error = key_acquire(&saidx, NULL); 6725 if (error != 0) { 6726 ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 6727 __func__, mhp->msg->sadb_msg_errno)); 6728 return key_senderror(so, m, error); 6729 } 6730 6731 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6732} 6733 6734/* 6735 * SADB_REGISTER processing. 6736 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6737 * receive 6738 * <base> 6739 * from the ikmpd, and register a socket to send PF_KEY messages, 6740 * and send 6741 * <base, supported> 6742 * to KMD by PF_KEY. 6743 * If socket is detached, must free from regnode. 6744 * 6745 * m will always be freed. 6746 */ 6747static int 6748key_register(so, m, mhp) 6749 struct socket *so; 6750 struct mbuf *m; 6751 const struct sadb_msghdr *mhp; 6752{ 6753 INIT_VNET_IPSEC(curvnet); 6754 struct secreg *reg, *newreg = 0; 6755 6756 IPSEC_ASSERT(so != NULL, ("null socket")); 6757 IPSEC_ASSERT(m != NULL, ("null mbuf")); 6758 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6759 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6760 6761 /* check for invalid register message */ 6762 if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0])) 6763 return key_senderror(so, m, EINVAL); 6764 6765 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6766 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6767 goto setmsg; 6768 6769 /* check whether existing or not */ 6770 REGTREE_LOCK(); 6771 LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) { 6772 if (reg->so == so) { 6773 REGTREE_UNLOCK(); 6774 ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6775 __func__)); 6776 return key_senderror(so, m, EEXIST); 6777 } 6778 } 6779 6780 /* create regnode */ 6781 newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6782 if (newreg == NULL) { 6783 REGTREE_UNLOCK(); 6784 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6785 return key_senderror(so, m, ENOBUFS); 6786 } 6787 6788 newreg->so = so; 6789 ((struct keycb *)sotorawcb(so))->kp_registered++; 6790 6791 /* add regnode to regtree. */ 6792 LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain); 6793 REGTREE_UNLOCK(); 6794 6795 setmsg: 6796 { 6797 struct mbuf *n; 6798 struct sadb_msg *newmsg; 6799 struct sadb_supported *sup; 6800 u_int len, alen, elen; 6801 int off; 6802 int i; 6803 struct sadb_alg *alg; 6804 6805 /* create new sadb_msg to reply. */ 6806 alen = 0; 6807 for (i = 1; i <= SADB_AALG_MAX; i++) { 6808 if (ah_algorithm_lookup(i)) 6809 alen += sizeof(struct sadb_alg); 6810 } 6811 if (alen) 6812 alen += sizeof(struct sadb_supported); 6813 elen = 0; 6814 for (i = 1; i <= SADB_EALG_MAX; i++) { 6815 if (esp_algorithm_lookup(i)) 6816 elen += sizeof(struct sadb_alg); 6817 } 6818 if (elen) 6819 elen += sizeof(struct sadb_supported); 6820 6821 len = sizeof(struct sadb_msg) + alen + elen; 6822 6823 if (len > MCLBYTES) 6824 return key_senderror(so, m, ENOBUFS); 6825 6826 MGETHDR(n, M_DONTWAIT, MT_DATA); 6827 if (len > MHLEN) { 6828 MCLGET(n, M_DONTWAIT); 6829 if ((n->m_flags & M_EXT) == 0) { 6830 m_freem(n); 6831 n = NULL; 6832 } 6833 } 6834 if (!n) 6835 return key_senderror(so, m, ENOBUFS); 6836 6837 n->m_pkthdr.len = n->m_len = len; 6838 n->m_next = NULL; 6839 off = 0; 6840 6841 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6842 newmsg = mtod(n, struct sadb_msg *); 6843 newmsg->sadb_msg_errno = 0; 6844 newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6845 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6846 6847 /* for authentication algorithm */ 6848 if (alen) { 6849 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6850 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6851 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6852 off += PFKEY_ALIGN8(sizeof(*sup)); 6853 6854 for (i = 1; i <= SADB_AALG_MAX; i++) { 6855 struct auth_hash *aalgo; 6856 u_int16_t minkeysize, maxkeysize; 6857 6858 aalgo = ah_algorithm_lookup(i); 6859 if (!aalgo) 6860 continue; 6861 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6862 alg->sadb_alg_id = i; 6863 alg->sadb_alg_ivlen = 0; 6864 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6865 alg->sadb_alg_minbits = _BITS(minkeysize); 6866 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6867 off += PFKEY_ALIGN8(sizeof(*alg)); 6868 } 6869 } 6870 6871 /* for encryption algorithm */ 6872 if (elen) { 6873 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6874 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6875 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6876 off += PFKEY_ALIGN8(sizeof(*sup)); 6877 6878 for (i = 1; i <= SADB_EALG_MAX; i++) { 6879 struct enc_xform *ealgo; 6880 6881 ealgo = esp_algorithm_lookup(i); 6882 if (!ealgo) 6883 continue; 6884 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6885 alg->sadb_alg_id = i; 6886 alg->sadb_alg_ivlen = ealgo->blocksize; 6887 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6888 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6889 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6890 } 6891 } 6892 6893 IPSEC_ASSERT(off == len, 6894 ("length assumption failed (off %u len %u)", off, len)); 6895 6896 m_freem(m); 6897 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6898 } 6899} 6900 6901/* 6902 * free secreg entry registered. 6903 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6904 */ 6905void 6906key_freereg(struct socket *so) 6907{ 6908 INIT_VNET_IPSEC(curvnet); 6909 struct secreg *reg; 6910 int i; 6911 6912 IPSEC_ASSERT(so != NULL, ("NULL so")); 6913 6914 /* 6915 * check whether existing or not. 6916 * check all type of SA, because there is a potential that 6917 * one socket is registered to multiple type of SA. 6918 */ 6919 REGTREE_LOCK(); 6920 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6921 LIST_FOREACH(reg, &V_regtree[i], chain) { 6922 if (reg->so == so && __LIST_CHAINED(reg)) { 6923 LIST_REMOVE(reg, chain); 6924 free(reg, M_IPSEC_SAR); 6925 break; 6926 } 6927 } 6928 } 6929 REGTREE_UNLOCK(); 6930} 6931 6932/* 6933 * SADB_EXPIRE processing 6934 * send 6935 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6936 * to KMD by PF_KEY. 6937 * NOTE: We send only soft lifetime extension. 6938 * 6939 * OUT: 0 : succeed 6940 * others : error number 6941 */ 6942static int 6943key_expire(struct secasvar *sav) 6944{ 6945 int s; 6946 int satype; 6947 struct mbuf *result = NULL, *m; 6948 int len; 6949 int error = -1; 6950 struct sadb_lifetime *lt; 6951 6952 /* XXX: Why do we lock ? */ 6953 s = splnet(); /*called from softclock()*/ 6954 6955 IPSEC_ASSERT (sav != NULL, ("null sav")); 6956 IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6957 6958 /* set msg header */ 6959 satype = key_proto2satype(sav->sah->saidx.proto); 6960 IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6961 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6962 if (!m) { 6963 error = ENOBUFS; 6964 goto fail; 6965 } 6966 result = m; 6967 6968 /* create SA extension */ 6969 m = key_setsadbsa(sav); 6970 if (!m) { 6971 error = ENOBUFS; 6972 goto fail; 6973 } 6974 m_cat(result, m); 6975 6976 /* create SA extension */ 6977 m = key_setsadbxsa2(sav->sah->saidx.mode, 6978 sav->replay ? sav->replay->count : 0, 6979 sav->sah->saidx.reqid); 6980 if (!m) { 6981 error = ENOBUFS; 6982 goto fail; 6983 } 6984 m_cat(result, m); 6985 6986 /* create lifetime extension (current and soft) */ 6987 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6988 m = key_alloc_mbuf(len); 6989 if (!m || m->m_next) { /*XXX*/ 6990 if (m) 6991 m_freem(m); 6992 error = ENOBUFS; 6993 goto fail; 6994 } 6995 bzero(mtod(m, caddr_t), len); 6996 lt = mtod(m, struct sadb_lifetime *); 6997 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6998 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6999 lt->sadb_lifetime_allocations = sav->lft_c->allocations; 7000 lt->sadb_lifetime_bytes = sav->lft_c->bytes; 7001 lt->sadb_lifetime_addtime = sav->lft_c->addtime; 7002 lt->sadb_lifetime_usetime = sav->lft_c->usetime; 7003 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 7004 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 7005 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 7006 lt->sadb_lifetime_allocations = sav->lft_s->allocations; 7007 lt->sadb_lifetime_bytes = sav->lft_s->bytes; 7008 lt->sadb_lifetime_addtime = sav->lft_s->addtime; 7009 lt->sadb_lifetime_usetime = sav->lft_s->usetime; 7010 m_cat(result, m); 7011 7012 /* set sadb_address for source */ 7013 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 7014 &sav->sah->saidx.src.sa, 7015 FULLMASK, IPSEC_ULPROTO_ANY); 7016 if (!m) { 7017 error = ENOBUFS; 7018 goto fail; 7019 } 7020 m_cat(result, m); 7021 7022 /* set sadb_address for destination */ 7023 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 7024 &sav->sah->saidx.dst.sa, 7025 FULLMASK, IPSEC_ULPROTO_ANY); 7026 if (!m) { 7027 error = ENOBUFS; 7028 goto fail; 7029 } 7030 m_cat(result, m); 7031 7032 /* 7033 * XXX-BZ Handle NAT-T extensions here. 7034 */ 7035 7036 if ((result->m_flags & M_PKTHDR) == 0) { 7037 error = EINVAL; 7038 goto fail; 7039 } 7040 7041 if (result->m_len < sizeof(struct sadb_msg)) { 7042 result = m_pullup(result, sizeof(struct sadb_msg)); 7043 if (result == NULL) { 7044 error = ENOBUFS; 7045 goto fail; 7046 } 7047 } 7048 7049 result->m_pkthdr.len = 0; 7050 for (m = result; m; m = m->m_next) 7051 result->m_pkthdr.len += m->m_len; 7052 7053 mtod(result, struct sadb_msg *)->sadb_msg_len = 7054 PFKEY_UNIT64(result->m_pkthdr.len); 7055 7056 splx(s); 7057 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7058 7059 fail: 7060 if (result) 7061 m_freem(result); 7062 splx(s); 7063 return error; 7064} 7065 7066/* 7067 * SADB_FLUSH processing 7068 * receive 7069 * <base> 7070 * from the ikmpd, and free all entries in secastree. 7071 * and send, 7072 * <base> 7073 * to the ikmpd. 7074 * NOTE: to do is only marking SADB_SASTATE_DEAD. 7075 * 7076 * m will always be freed. 7077 */ 7078static int 7079key_flush(so, m, mhp) 7080 struct socket *so; 7081 struct mbuf *m; 7082 const struct sadb_msghdr *mhp; 7083{ 7084 INIT_VNET_IPSEC(curvnet); 7085 struct sadb_msg *newmsg; 7086 struct secashead *sah, *nextsah; 7087 struct secasvar *sav, *nextsav; 7088 u_int16_t proto; 7089 u_int8_t state; 7090 u_int stateidx; 7091 7092 IPSEC_ASSERT(so != NULL, ("null socket")); 7093 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7094 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7095 7096 /* map satype to proto */ 7097 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7098 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7099 __func__)); 7100 return key_senderror(so, m, EINVAL); 7101 } 7102 7103 /* no SATYPE specified, i.e. flushing all SA. */ 7104 SAHTREE_LOCK(); 7105 for (sah = LIST_FIRST(&V_sahtree); 7106 sah != NULL; 7107 sah = nextsah) { 7108 nextsah = LIST_NEXT(sah, chain); 7109 7110 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7111 && proto != sah->saidx.proto) 7112 continue; 7113 7114 for (stateidx = 0; 7115 stateidx < _ARRAYLEN(saorder_state_alive); 7116 stateidx++) { 7117 state = saorder_state_any[stateidx]; 7118 for (sav = LIST_FIRST(&sah->savtree[state]); 7119 sav != NULL; 7120 sav = nextsav) { 7121 7122 nextsav = LIST_NEXT(sav, chain); 7123 7124 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7125 KEY_FREESAV(&sav); 7126 } 7127 } 7128 7129 sah->state = SADB_SASTATE_DEAD; 7130 } 7131 SAHTREE_UNLOCK(); 7132 7133 if (m->m_len < sizeof(struct sadb_msg) || 7134 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7135 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 7136 return key_senderror(so, m, ENOBUFS); 7137 } 7138 7139 if (m->m_next) 7140 m_freem(m->m_next); 7141 m->m_next = NULL; 7142 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7143 newmsg = mtod(m, struct sadb_msg *); 7144 newmsg->sadb_msg_errno = 0; 7145 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7146 7147 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7148} 7149 7150/* 7151 * SADB_DUMP processing 7152 * dump all entries including status of DEAD in SAD. 7153 * receive 7154 * <base> 7155 * from the ikmpd, and dump all secasvar leaves 7156 * and send, 7157 * <base> ..... 7158 * to the ikmpd. 7159 * 7160 * m will always be freed. 7161 */ 7162static int 7163key_dump(so, m, mhp) 7164 struct socket *so; 7165 struct mbuf *m; 7166 const struct sadb_msghdr *mhp; 7167{ 7168 INIT_VNET_IPSEC(curvnet); 7169 struct secashead *sah; 7170 struct secasvar *sav; 7171 u_int16_t proto; 7172 u_int stateidx; 7173 u_int8_t satype; 7174 u_int8_t state; 7175 int cnt; 7176 struct sadb_msg *newmsg; 7177 struct mbuf *n; 7178 7179 IPSEC_ASSERT(so != NULL, ("null socket")); 7180 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7181 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7182 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7183 7184 /* map satype to proto */ 7185 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7186 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7187 __func__)); 7188 return key_senderror(so, m, EINVAL); 7189 } 7190 7191 /* count sav entries to be sent to the userland. */ 7192 cnt = 0; 7193 SAHTREE_LOCK(); 7194 LIST_FOREACH(sah, &V_sahtree, chain) { 7195 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7196 && proto != sah->saidx.proto) 7197 continue; 7198 7199 for (stateidx = 0; 7200 stateidx < _ARRAYLEN(saorder_state_any); 7201 stateidx++) { 7202 state = saorder_state_any[stateidx]; 7203 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7204 cnt++; 7205 } 7206 } 7207 } 7208 7209 if (cnt == 0) { 7210 SAHTREE_UNLOCK(); 7211 return key_senderror(so, m, ENOENT); 7212 } 7213 7214 /* send this to the userland, one at a time. */ 7215 newmsg = NULL; 7216 LIST_FOREACH(sah, &V_sahtree, chain) { 7217 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7218 && proto != sah->saidx.proto) 7219 continue; 7220 7221 /* map proto to satype */ 7222 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7223 SAHTREE_UNLOCK(); 7224 ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 7225 "SAD.\n", __func__)); 7226 return key_senderror(so, m, EINVAL); 7227 } 7228 7229 for (stateidx = 0; 7230 stateidx < _ARRAYLEN(saorder_state_any); 7231 stateidx++) { 7232 state = saorder_state_any[stateidx]; 7233 LIST_FOREACH(sav, &sah->savtree[state], chain) { 7234 n = key_setdumpsa(sav, SADB_DUMP, satype, 7235 --cnt, mhp->msg->sadb_msg_pid); 7236 if (!n) { 7237 SAHTREE_UNLOCK(); 7238 return key_senderror(so, m, ENOBUFS); 7239 } 7240 key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 7241 } 7242 } 7243 } 7244 SAHTREE_UNLOCK(); 7245 7246 m_freem(m); 7247 return 0; 7248} 7249 7250/* 7251 * SADB_X_PROMISC processing 7252 * 7253 * m will always be freed. 7254 */ 7255static int 7256key_promisc(so, m, mhp) 7257 struct socket *so; 7258 struct mbuf *m; 7259 const struct sadb_msghdr *mhp; 7260{ 7261 int olen; 7262 7263 IPSEC_ASSERT(so != NULL, ("null socket")); 7264 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7265 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7266 IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7267 7268 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7269 7270 if (olen < sizeof(struct sadb_msg)) { 7271#if 1 7272 return key_senderror(so, m, EINVAL); 7273#else 7274 m_freem(m); 7275 return 0; 7276#endif 7277 } else if (olen == sizeof(struct sadb_msg)) { 7278 /* enable/disable promisc mode */ 7279 struct keycb *kp; 7280 7281 if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7282 return key_senderror(so, m, EINVAL); 7283 mhp->msg->sadb_msg_errno = 0; 7284 switch (mhp->msg->sadb_msg_satype) { 7285 case 0: 7286 case 1: 7287 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7288 break; 7289 default: 7290 return key_senderror(so, m, EINVAL); 7291 } 7292 7293 /* send the original message back to everyone */ 7294 mhp->msg->sadb_msg_errno = 0; 7295 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7296 } else { 7297 /* send packet as is */ 7298 7299 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7300 7301 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7302 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7303 } 7304} 7305 7306static int (*key_typesw[]) __P((struct socket *, struct mbuf *, 7307 const struct sadb_msghdr *)) = { 7308 NULL, /* SADB_RESERVED */ 7309 key_getspi, /* SADB_GETSPI */ 7310 key_update, /* SADB_UPDATE */ 7311 key_add, /* SADB_ADD */ 7312 key_delete, /* SADB_DELETE */ 7313 key_get, /* SADB_GET */ 7314 key_acquire2, /* SADB_ACQUIRE */ 7315 key_register, /* SADB_REGISTER */ 7316 NULL, /* SADB_EXPIRE */ 7317 key_flush, /* SADB_FLUSH */ 7318 key_dump, /* SADB_DUMP */ 7319 key_promisc, /* SADB_X_PROMISC */ 7320 NULL, /* SADB_X_PCHANGE */ 7321 key_spdadd, /* SADB_X_SPDUPDATE */ 7322 key_spdadd, /* SADB_X_SPDADD */ 7323 key_spddelete, /* SADB_X_SPDDELETE */ 7324 key_spdget, /* SADB_X_SPDGET */ 7325 NULL, /* SADB_X_SPDACQUIRE */ 7326 key_spddump, /* SADB_X_SPDDUMP */ 7327 key_spdflush, /* SADB_X_SPDFLUSH */ 7328 key_spdadd, /* SADB_X_SPDSETIDX */ 7329 NULL, /* SADB_X_SPDEXPIRE */ 7330 key_spddelete2, /* SADB_X_SPDDELETE2 */ 7331}; 7332 7333/* 7334 * parse sadb_msg buffer to process PFKEYv2, 7335 * and create a data to response if needed. 7336 * I think to be dealed with mbuf directly. 7337 * IN: 7338 * msgp : pointer to pointer to a received buffer pulluped. 7339 * This is rewrited to response. 7340 * so : pointer to socket. 7341 * OUT: 7342 * length for buffer to send to user process. 7343 */ 7344int 7345key_parse(m, so) 7346 struct mbuf *m; 7347 struct socket *so; 7348{ 7349 INIT_VNET_IPSEC(curvnet); 7350 struct sadb_msg *msg; 7351 struct sadb_msghdr mh; 7352 u_int orglen; 7353 int error; 7354 int target; 7355 7356 IPSEC_ASSERT(so != NULL, ("null socket")); 7357 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7358 7359#if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7360 KEYDEBUG(KEYDEBUG_KEY_DUMP, 7361 ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 7362 kdebug_sadb(msg)); 7363#endif 7364 7365 if (m->m_len < sizeof(struct sadb_msg)) { 7366 m = m_pullup(m, sizeof(struct sadb_msg)); 7367 if (!m) 7368 return ENOBUFS; 7369 } 7370 msg = mtod(m, struct sadb_msg *); 7371 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7372 target = KEY_SENDUP_ONE; 7373 7374 if ((m->m_flags & M_PKTHDR) == 0 || 7375 m->m_pkthdr.len != m->m_pkthdr.len) { 7376 ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 7377 V_pfkeystat.out_invlen++; 7378 error = EINVAL; 7379 goto senderror; 7380 } 7381 7382 if (msg->sadb_msg_version != PF_KEY_V2) { 7383 ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 7384 __func__, msg->sadb_msg_version)); 7385 V_pfkeystat.out_invver++; 7386 error = EINVAL; 7387 goto senderror; 7388 } 7389 7390 if (msg->sadb_msg_type > SADB_MAX) { 7391 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7392 __func__, msg->sadb_msg_type)); 7393 V_pfkeystat.out_invmsgtype++; 7394 error = EINVAL; 7395 goto senderror; 7396 } 7397 7398 /* for old-fashioned code - should be nuked */ 7399 if (m->m_pkthdr.len > MCLBYTES) { 7400 m_freem(m); 7401 return ENOBUFS; 7402 } 7403 if (m->m_next) { 7404 struct mbuf *n; 7405 7406 MGETHDR(n, M_DONTWAIT, MT_DATA); 7407 if (n && m->m_pkthdr.len > MHLEN) { 7408 MCLGET(n, M_DONTWAIT); 7409 if ((n->m_flags & M_EXT) == 0) { 7410 m_free(n); 7411 n = NULL; 7412 } 7413 } 7414 if (!n) { 7415 m_freem(m); 7416 return ENOBUFS; 7417 } 7418 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 7419 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7420 n->m_next = NULL; 7421 m_freem(m); 7422 m = n; 7423 } 7424 7425 /* align the mbuf chain so that extensions are in contiguous region. */ 7426 error = key_align(m, &mh); 7427 if (error) 7428 return error; 7429 7430 msg = mh.msg; 7431 7432 /* check SA type */ 7433 switch (msg->sadb_msg_satype) { 7434 case SADB_SATYPE_UNSPEC: 7435 switch (msg->sadb_msg_type) { 7436 case SADB_GETSPI: 7437 case SADB_UPDATE: 7438 case SADB_ADD: 7439 case SADB_DELETE: 7440 case SADB_GET: 7441 case SADB_ACQUIRE: 7442 case SADB_EXPIRE: 7443 ipseclog((LOG_DEBUG, "%s: must specify satype " 7444 "when msg type=%u.\n", __func__, 7445 msg->sadb_msg_type)); 7446 V_pfkeystat.out_invsatype++; 7447 error = EINVAL; 7448 goto senderror; 7449 } 7450 break; 7451 case SADB_SATYPE_AH: 7452 case SADB_SATYPE_ESP: 7453 case SADB_X_SATYPE_IPCOMP: 7454 case SADB_X_SATYPE_TCPSIGNATURE: 7455 switch (msg->sadb_msg_type) { 7456 case SADB_X_SPDADD: 7457 case SADB_X_SPDDELETE: 7458 case SADB_X_SPDGET: 7459 case SADB_X_SPDDUMP: 7460 case SADB_X_SPDFLUSH: 7461 case SADB_X_SPDSETIDX: 7462 case SADB_X_SPDUPDATE: 7463 case SADB_X_SPDDELETE2: 7464 ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 7465 __func__, msg->sadb_msg_type)); 7466 V_pfkeystat.out_invsatype++; 7467 error = EINVAL; 7468 goto senderror; 7469 } 7470 break; 7471 case SADB_SATYPE_RSVP: 7472 case SADB_SATYPE_OSPFV2: 7473 case SADB_SATYPE_RIPV2: 7474 case SADB_SATYPE_MIP: 7475 ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 7476 __func__, msg->sadb_msg_satype)); 7477 V_pfkeystat.out_invsatype++; 7478 error = EOPNOTSUPP; 7479 goto senderror; 7480 case 1: /* XXX: What does it do? */ 7481 if (msg->sadb_msg_type == SADB_X_PROMISC) 7482 break; 7483 /*FALLTHROUGH*/ 7484 default: 7485 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7486 __func__, msg->sadb_msg_satype)); 7487 V_pfkeystat.out_invsatype++; 7488 error = EINVAL; 7489 goto senderror; 7490 } 7491 7492 /* check field of upper layer protocol and address family */ 7493 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7494 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7495 struct sadb_address *src0, *dst0; 7496 u_int plen; 7497 7498 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7499 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7500 7501 /* check upper layer protocol */ 7502 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7503 ipseclog((LOG_DEBUG, "%s: upper layer protocol " 7504 "mismatched.\n", __func__)); 7505 V_pfkeystat.out_invaddr++; 7506 error = EINVAL; 7507 goto senderror; 7508 } 7509 7510 /* check family */ 7511 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7512 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7513 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 7514 __func__)); 7515 V_pfkeystat.out_invaddr++; 7516 error = EINVAL; 7517 goto senderror; 7518 } 7519 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7520 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7521 ipseclog((LOG_DEBUG, "%s: address struct size " 7522 "mismatched.\n", __func__)); 7523 V_pfkeystat.out_invaddr++; 7524 error = EINVAL; 7525 goto senderror; 7526 } 7527 7528 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7529 case AF_INET: 7530 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7531 sizeof(struct sockaddr_in)) { 7532 V_pfkeystat.out_invaddr++; 7533 error = EINVAL; 7534 goto senderror; 7535 } 7536 break; 7537 case AF_INET6: 7538 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7539 sizeof(struct sockaddr_in6)) { 7540 V_pfkeystat.out_invaddr++; 7541 error = EINVAL; 7542 goto senderror; 7543 } 7544 break; 7545 default: 7546 ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 7547 __func__)); 7548 V_pfkeystat.out_invaddr++; 7549 error = EAFNOSUPPORT; 7550 goto senderror; 7551 } 7552 7553 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7554 case AF_INET: 7555 plen = sizeof(struct in_addr) << 3; 7556 break; 7557 case AF_INET6: 7558 plen = sizeof(struct in6_addr) << 3; 7559 break; 7560 default: 7561 plen = 0; /*fool gcc*/ 7562 break; 7563 } 7564 7565 /* check max prefix length */ 7566 if (src0->sadb_address_prefixlen > plen || 7567 dst0->sadb_address_prefixlen > plen) { 7568 ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n", 7569 __func__)); 7570 V_pfkeystat.out_invaddr++; 7571 error = EINVAL; 7572 goto senderror; 7573 } 7574 7575 /* 7576 * prefixlen == 0 is valid because there can be a case when 7577 * all addresses are matched. 7578 */ 7579 } 7580 7581 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7582 key_typesw[msg->sadb_msg_type] == NULL) { 7583 V_pfkeystat.out_invmsgtype++; 7584 error = EINVAL; 7585 goto senderror; 7586 } 7587 7588 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7589 7590senderror: 7591 msg->sadb_msg_errno = error; 7592 return key_sendup_mbuf(so, m, target); 7593} 7594 7595static int 7596key_senderror(so, m, code) 7597 struct socket *so; 7598 struct mbuf *m; 7599 int code; 7600{ 7601 struct sadb_msg *msg; 7602 7603 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7604 ("mbuf too small, len %u", m->m_len)); 7605 7606 msg = mtod(m, struct sadb_msg *); 7607 msg->sadb_msg_errno = code; 7608 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7609} 7610 7611/* 7612 * set the pointer to each header into message buffer. 7613 * m will be freed on error. 7614 * XXX larger-than-MCLBYTES extension? 7615 */ 7616static int 7617key_align(m, mhp) 7618 struct mbuf *m; 7619 struct sadb_msghdr *mhp; 7620{ 7621 INIT_VNET_IPSEC(curvnet); 7622 struct mbuf *n; 7623 struct sadb_ext *ext; 7624 size_t off, end; 7625 int extlen; 7626 int toff; 7627 7628 IPSEC_ASSERT(m != NULL, ("null mbuf")); 7629 IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7630 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7631 ("mbuf too small, len %u", m->m_len)); 7632 7633 /* initialize */ 7634 bzero(mhp, sizeof(*mhp)); 7635 7636 mhp->msg = mtod(m, struct sadb_msg *); 7637 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7638 7639 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7640 extlen = end; /*just in case extlen is not updated*/ 7641 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7642 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7643 if (!n) { 7644 /* m is already freed */ 7645 return ENOBUFS; 7646 } 7647 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7648 7649 /* set pointer */ 7650 switch (ext->sadb_ext_type) { 7651 case SADB_EXT_SA: 7652 case SADB_EXT_ADDRESS_SRC: 7653 case SADB_EXT_ADDRESS_DST: 7654 case SADB_EXT_ADDRESS_PROXY: 7655 case SADB_EXT_LIFETIME_CURRENT: 7656 case SADB_EXT_LIFETIME_HARD: 7657 case SADB_EXT_LIFETIME_SOFT: 7658 case SADB_EXT_KEY_AUTH: 7659 case SADB_EXT_KEY_ENCRYPT: 7660 case SADB_EXT_IDENTITY_SRC: 7661 case SADB_EXT_IDENTITY_DST: 7662 case SADB_EXT_SENSITIVITY: 7663 case SADB_EXT_PROPOSAL: 7664 case SADB_EXT_SUPPORTED_AUTH: 7665 case SADB_EXT_SUPPORTED_ENCRYPT: 7666 case SADB_EXT_SPIRANGE: 7667 case SADB_X_EXT_POLICY: 7668 case SADB_X_EXT_SA2: 7669#ifdef IPSEC_NAT_T 7670 case SADB_X_EXT_NAT_T_TYPE: 7671 case SADB_X_EXT_NAT_T_SPORT: 7672 case SADB_X_EXT_NAT_T_DPORT: 7673 case SADB_X_EXT_NAT_T_OAI: 7674 case SADB_X_EXT_NAT_T_OAR: 7675 case SADB_X_EXT_NAT_T_FRAG: 7676#endif 7677 /* duplicate check */ 7678 /* 7679 * XXX Are there duplication payloads of either 7680 * KEY_AUTH or KEY_ENCRYPT ? 7681 */ 7682 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7683 ipseclog((LOG_DEBUG, "%s: duplicate ext_type " 7684 "%u\n", __func__, ext->sadb_ext_type)); 7685 m_freem(m); 7686 V_pfkeystat.out_dupext++; 7687 return EINVAL; 7688 } 7689 break; 7690 default: 7691 ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 7692 __func__, ext->sadb_ext_type)); 7693 m_freem(m); 7694 V_pfkeystat.out_invexttype++; 7695 return EINVAL; 7696 } 7697 7698 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7699 7700 if (key_validate_ext(ext, extlen)) { 7701 m_freem(m); 7702 V_pfkeystat.out_invlen++; 7703 return EINVAL; 7704 } 7705 7706 n = m_pulldown(m, off, extlen, &toff); 7707 if (!n) { 7708 /* m is already freed */ 7709 return ENOBUFS; 7710 } 7711 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7712 7713 mhp->ext[ext->sadb_ext_type] = ext; 7714 mhp->extoff[ext->sadb_ext_type] = off; 7715 mhp->extlen[ext->sadb_ext_type] = extlen; 7716 } 7717 7718 if (off != end) { 7719 m_freem(m); 7720 V_pfkeystat.out_invlen++; 7721 return EINVAL; 7722 } 7723 7724 return 0; 7725} 7726 7727static int 7728key_validate_ext(ext, len) 7729 const struct sadb_ext *ext; 7730 int len; 7731{ 7732 const struct sockaddr *sa; 7733 enum { NONE, ADDR } checktype = NONE; 7734 int baselen = 0; 7735 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7736 7737 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7738 return EINVAL; 7739 7740 /* if it does not match minimum/maximum length, bail */ 7741 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7742 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7743 return EINVAL; 7744 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7745 return EINVAL; 7746 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7747 return EINVAL; 7748 7749 /* more checks based on sadb_ext_type XXX need more */ 7750 switch (ext->sadb_ext_type) { 7751 case SADB_EXT_ADDRESS_SRC: 7752 case SADB_EXT_ADDRESS_DST: 7753 case SADB_EXT_ADDRESS_PROXY: 7754 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7755 checktype = ADDR; 7756 break; 7757 case SADB_EXT_IDENTITY_SRC: 7758 case SADB_EXT_IDENTITY_DST: 7759 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7760 SADB_X_IDENTTYPE_ADDR) { 7761 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7762 checktype = ADDR; 7763 } else 7764 checktype = NONE; 7765 break; 7766 default: 7767 checktype = NONE; 7768 break; 7769 } 7770 7771 switch (checktype) { 7772 case NONE: 7773 break; 7774 case ADDR: 7775 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7776 if (len < baselen + sal) 7777 return EINVAL; 7778 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7779 return EINVAL; 7780 break; 7781 } 7782 7783 return 0; 7784} 7785 7786void 7787key_init(void) 7788{ 7789 INIT_VNET_IPSEC(curvnet); 7790 int i; 7791 7792 V_key_debug_level = 0; 7793 V_key_spi_trycnt = 1000; 7794 V_key_spi_minval = 0x100; 7795 V_key_spi_maxval = 0x0fffffff; /* XXX */ 7796 V_policy_id = 0; 7797 V_key_int_random = 60; /*interval to initialize randseed,1(m)*/ 7798 V_key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 7799 V_key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 7800 V_key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 7801 V_key_preferred_oldsa = 1; /* preferred old sa rather than new sa*/ 7802 7803 V_acq_seq = 0; 7804 7805 V_ipsec_esp_keymin = 256; 7806 V_ipsec_esp_auth = 0; 7807 V_ipsec_ah_keymin = 128; 7808 7809 for (i = 0; i < IPSEC_DIR_MAX; i++) 7810 LIST_INIT(&V_sptree[i]); 7811 7812 LIST_INIT(&V_sahtree); 7813 7814 for (i = 0; i <= SADB_SATYPE_MAX; i++) 7815 LIST_INIT(&V_regtree[i]); 7816 7817 LIST_INIT(&V_acqtree); 7818 LIST_INIT(&V_spacqtree); 7819 7820 /* system default */ 7821 V_ip4_def_policy.policy = IPSEC_POLICY_NONE; 7822 V_ip4_def_policy.refcnt++; /*never reclaim this*/ 7823 7824 if (!IS_DEFAULT_VNET(curvnet)) 7825 return; 7826 7827 SPTREE_LOCK_INIT(); 7828 REGTREE_LOCK_INIT(); 7829 SAHTREE_LOCK_INIT(); 7830 ACQ_LOCK_INIT(); 7831 SPACQ_LOCK_INIT(); 7832 7833#ifndef IPSEC_DEBUG2 7834 timeout((void *)key_timehandler, (void *)0, hz); 7835#endif /*IPSEC_DEBUG2*/ 7836 7837 /* initialize key statistics */ 7838 keystat.getspi_count = 1; 7839 7840 printf("IPsec: Initialized Security Association Processing.\n"); 7841} 7842 7843#ifdef VIMAGE 7844void 7845key_destroy(void) 7846{ 7847 INIT_VNET_IPSEC(curvnet); 7848 struct secpolicy *sp, *nextsp; 7849 struct secspacq *acq, *nextacq; 7850 struct secashead *sah, *nextsah; 7851 struct secreg *reg; 7852 int i; 7853 7854 SPTREE_LOCK(); 7855 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7856 for (sp = LIST_FIRST(&V_sptree[i]); 7857 sp != NULL; sp = nextsp) { 7858 nextsp = LIST_NEXT(sp, chain); 7859 if (__LIST_CHAINED(sp)) { 7860 LIST_REMOVE(sp, chain); 7861 free(sp, M_IPSEC_SP); 7862 } 7863 } 7864 } 7865 SPTREE_UNLOCK(); 7866 7867 SAHTREE_LOCK(); 7868 for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) { 7869 nextsah = LIST_NEXT(sah, chain); 7870 if (__LIST_CHAINED(sah)) { 7871 LIST_REMOVE(sah, chain); 7872 free(sah, M_IPSEC_SAH); 7873 } 7874 } 7875 SAHTREE_UNLOCK(); 7876 7877 REGTREE_LOCK(); 7878 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7879 LIST_FOREACH(reg, &V_regtree[i], chain) { 7880 if (__LIST_CHAINED(reg)) { 7881 LIST_REMOVE(reg, chain); 7882 free(reg, M_IPSEC_SAR); 7883 break; 7884 } 7885 } 7886 } 7887 REGTREE_UNLOCK(); 7888 7889 ACQ_LOCK(); 7890 for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 7891 nextacq = LIST_NEXT(acq, chain); 7892 if (__LIST_CHAINED(acq)) { 7893 LIST_REMOVE(acq, chain); 7894 free(acq, M_IPSEC_SAQ); 7895 } 7896 } 7897 ACQ_UNLOCK(); 7898 7899 SPACQ_LOCK(); 7900 for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 7901 nextacq = LIST_NEXT(acq, chain); 7902 if (__LIST_CHAINED(acq)) { 7903 LIST_REMOVE(acq, chain); 7904 free(acq, M_IPSEC_SAQ); 7905 } 7906 } 7907 SPACQ_UNLOCK(); 7908} 7909#endif 7910 7911/* 7912 * XXX: maybe This function is called after INBOUND IPsec processing. 7913 * 7914 * Special check for tunnel-mode packets. 7915 * We must make some checks for consistency between inner and outer IP header. 7916 * 7917 * xxx more checks to be provided 7918 */ 7919int 7920key_checktunnelsanity(sav, family, src, dst) 7921 struct secasvar *sav; 7922 u_int family; 7923 caddr_t src; 7924 caddr_t dst; 7925{ 7926 IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7927 7928 /* XXX: check inner IP header */ 7929 7930 return 1; 7931} 7932 7933/* record data transfer on SA, and update timestamps */ 7934void 7935key_sa_recordxfer(sav, m) 7936 struct secasvar *sav; 7937 struct mbuf *m; 7938{ 7939 IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7940 IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7941 if (!sav->lft_c) 7942 return; 7943 7944 /* 7945 * XXX Currently, there is a difference of bytes size 7946 * between inbound and outbound processing. 7947 */ 7948 sav->lft_c->bytes += m->m_pkthdr.len; 7949 /* to check bytes lifetime is done in key_timehandler(). */ 7950 7951 /* 7952 * We use the number of packets as the unit of 7953 * allocations. We increment the variable 7954 * whenever {esp,ah}_{in,out}put is called. 7955 */ 7956 sav->lft_c->allocations++; 7957 /* XXX check for expires? */ 7958 7959 /* 7960 * NOTE: We record CURRENT usetime by using wall clock, 7961 * in seconds. HARD and SOFT lifetime are measured by the time 7962 * difference (again in seconds) from usetime. 7963 * 7964 * usetime 7965 * v expire expire 7966 * -----+-----+--------+---> t 7967 * <--------------> HARD 7968 * <-----> SOFT 7969 */ 7970 sav->lft_c->usetime = time_second; 7971 /* XXX check for expires? */ 7972 7973 return; 7974} 7975 7976/* dumb version */ 7977void 7978key_sa_routechange(dst) 7979 struct sockaddr *dst; 7980{ 7981 INIT_VNET_IPSEC(curvnet); 7982 struct secashead *sah; 7983 struct route *ro; 7984 7985 SAHTREE_LOCK(); 7986 LIST_FOREACH(sah, &V_sahtree, chain) { 7987 ro = &sah->sa_route; 7988 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7989 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7990 RTFREE(ro->ro_rt); 7991 ro->ro_rt = (struct rtentry *)NULL; 7992 } 7993 } 7994 SAHTREE_UNLOCK(); 7995} 7996 7997static void 7998key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7999{ 8000 IPSEC_ASSERT(sav != NULL, ("NULL sav")); 8001 SAHTREE_LOCK_ASSERT(); 8002 8003 if (sav->state != state) { 8004 if (__LIST_CHAINED(sav)) 8005 LIST_REMOVE(sav, chain); 8006 sav->state = state; 8007 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 8008 } 8009} 8010 8011void 8012key_sa_stir_iv(sav) 8013 struct secasvar *sav; 8014{ 8015 8016 IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 8017 key_randomfill(sav->iv, sav->ivlen); 8018} 8019 8020/* XXX too much? */ 8021static struct mbuf * 8022key_alloc_mbuf(l) 8023 int l; 8024{ 8025 struct mbuf *m = NULL, *n; 8026 int len, t; 8027 8028 len = l; 8029 while (len > 0) { 8030 MGET(n, M_DONTWAIT, MT_DATA); 8031 if (n && len > MLEN) 8032 MCLGET(n, M_DONTWAIT); 8033 if (!n) { 8034 m_freem(m); 8035 return NULL; 8036 } 8037 8038 n->m_next = NULL; 8039 n->m_len = 0; 8040 n->m_len = M_TRAILINGSPACE(n); 8041 /* use the bottom of mbuf, hoping we can prepend afterwards */ 8042 if (n->m_len > len) { 8043 t = (n->m_len - len) & ~(sizeof(long) - 1); 8044 n->m_data += t; 8045 n->m_len = len; 8046 } 8047 8048 len -= n->m_len; 8049 8050 if (m) 8051 m_cat(m, n); 8052 else 8053 m = n; 8054 } 8055 8056 return m; 8057} 8058 8059/* 8060 * Take one of the kernel's security keys and convert it into a PF_KEY 8061 * structure within an mbuf, suitable for sending up to a waiting 8062 * application in user land. 8063 * 8064 * IN: 8065 * src: A pointer to a kernel security key. 8066 * exttype: Which type of key this is. Refer to the PF_KEY data structures. 8067 * OUT: 8068 * a valid mbuf or NULL indicating an error 8069 * 8070 */ 8071 8072static struct mbuf * 8073key_setkey(struct seckey *src, u_int16_t exttype) 8074{ 8075 struct mbuf *m; 8076 struct sadb_key *p; 8077 int len; 8078 8079 if (src == NULL) 8080 return NULL; 8081 8082 len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); 8083 m = key_alloc_mbuf(len); 8084 if (m == NULL) 8085 return NULL; 8086 p = mtod(m, struct sadb_key *); 8087 bzero(p, len); 8088 p->sadb_key_len = PFKEY_UNIT64(len); 8089 p->sadb_key_exttype = exttype; 8090 p->sadb_key_bits = src->bits; 8091 bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src)); 8092 8093 return m; 8094} 8095 8096/* 8097 * Take one of the kernel's lifetime data structures and convert it 8098 * into a PF_KEY structure within an mbuf, suitable for sending up to 8099 * a waiting application in user land. 8100 * 8101 * IN: 8102 * src: A pointer to a kernel lifetime structure. 8103 * exttype: Which type of lifetime this is. Refer to the PF_KEY 8104 * data structures for more information. 8105 * OUT: 8106 * a valid mbuf or NULL indicating an error 8107 * 8108 */ 8109 8110static struct mbuf * 8111key_setlifetime(struct seclifetime *src, u_int16_t exttype) 8112{ 8113 struct mbuf *m = NULL; 8114 struct sadb_lifetime *p; 8115 int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime)); 8116 8117 if (src == NULL) 8118 return NULL; 8119 8120 m = key_alloc_mbuf(len); 8121 if (m == NULL) 8122 return m; 8123 p = mtod(m, struct sadb_lifetime *); 8124 8125 bzero(p, len); 8126 p->sadb_lifetime_len = PFKEY_UNIT64(len); 8127 p->sadb_lifetime_exttype = exttype; 8128 p->sadb_lifetime_allocations = src->allocations; 8129 p->sadb_lifetime_bytes = src->bytes; 8130 p->sadb_lifetime_addtime = src->addtime; 8131 p->sadb_lifetime_usetime = src->usetime; 8132 8133 return m; 8134 8135} 8136