key.c revision 125876
1105197Ssam/* $FreeBSD: head/sys/netipsec/key.c 125876 2004-02-16 17:09:53Z guido $ */ 2105197Ssam/* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 3105197Ssam 4105197Ssam/* 5105197Ssam * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6105197Ssam * All rights reserved. 7105197Ssam * 8105197Ssam * Redistribution and use in source and binary forms, with or without 9105197Ssam * modification, are permitted provided that the following conditions 10105197Ssam * are met: 11105197Ssam * 1. Redistributions of source code must retain the above copyright 12105197Ssam * notice, this list of conditions and the following disclaimer. 13105197Ssam * 2. Redistributions in binary form must reproduce the above copyright 14105197Ssam * notice, this list of conditions and the following disclaimer in the 15105197Ssam * documentation and/or other materials provided with the distribution. 16105197Ssam * 3. Neither the name of the project nor the names of its contributors 17105197Ssam * may be used to endorse or promote products derived from this software 18105197Ssam * without specific prior written permission. 19105197Ssam * 20105197Ssam * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21105197Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22105197Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23105197Ssam * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24105197Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25105197Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26105197Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27105197Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28105197Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29105197Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30105197Ssam * SUCH DAMAGE. 31105197Ssam */ 32105197Ssam 33105197Ssam/* 34105197Ssam * This code is referd to RFC 2367 35105197Ssam */ 36105197Ssam 37105197Ssam#include "opt_inet.h" 38105197Ssam#include "opt_inet6.h" 39105197Ssam#include "opt_ipsec.h" 40105197Ssam 41105197Ssam#include <sys/types.h> 42105197Ssam#include <sys/param.h> 43105197Ssam#include <sys/systm.h> 44105197Ssam#include <sys/kernel.h> 45119643Ssam#include <sys/lock.h> 46119643Ssam#include <sys/mutex.h> 47105197Ssam#include <sys/mbuf.h> 48105197Ssam#include <sys/domain.h> 49105197Ssam#include <sys/protosw.h> 50105197Ssam#include <sys/malloc.h> 51105197Ssam#include <sys/socket.h> 52105197Ssam#include <sys/socketvar.h> 53105197Ssam#include <sys/sysctl.h> 54105197Ssam#include <sys/errno.h> 55105197Ssam#include <sys/proc.h> 56105197Ssam#include <sys/queue.h> 57105197Ssam#include <sys/syslog.h> 58105197Ssam 59105197Ssam#include <net/if.h> 60105197Ssam#include <net/route.h> 61105197Ssam#include <net/raw_cb.h> 62105197Ssam 63105197Ssam#include <netinet/in.h> 64105197Ssam#include <netinet/in_systm.h> 65105197Ssam#include <netinet/ip.h> 66105197Ssam#include <netinet/in_var.h> 67105197Ssam 68105197Ssam#ifdef INET6 69105197Ssam#include <netinet/ip6.h> 70105197Ssam#include <netinet6/in6_var.h> 71105197Ssam#include <netinet6/ip6_var.h> 72105197Ssam#endif /* INET6 */ 73105197Ssam 74105197Ssam#ifdef INET 75105197Ssam#include <netinet/in_pcb.h> 76105197Ssam#endif 77105197Ssam#ifdef INET6 78105197Ssam#include <netinet6/in6_pcb.h> 79105197Ssam#endif /* INET6 */ 80105197Ssam 81105197Ssam#include <net/pfkeyv2.h> 82105197Ssam#include <netipsec/keydb.h> 83105197Ssam#include <netipsec/key.h> 84105197Ssam#include <netipsec/keysock.h> 85105197Ssam#include <netipsec/key_debug.h> 86105197Ssam 87105197Ssam#include <netipsec/ipsec.h> 88105197Ssam#ifdef INET6 89105197Ssam#include <netipsec/ipsec6.h> 90105197Ssam#endif 91105197Ssam 92105197Ssam#include <netipsec/xform.h> 93105197Ssam 94105197Ssam#include <machine/stdarg.h> 95105197Ssam 96105197Ssam/* randomness */ 97105197Ssam#include <sys/random.h> 98105197Ssam 99105197Ssam#define FULLMASK 0xff 100105197Ssam#define _BITS(bytes) ((bytes) << 3) 101105197Ssam 102105197Ssam/* 103105197Ssam * Note on SA reference counting: 104105197Ssam * - SAs that are not in DEAD state will have (total external reference + 1) 105105197Ssam * following value in reference count field. they cannot be freed and are 106105197Ssam * referenced from SA header. 107105197Ssam * - SAs that are in DEAD state will have (total external reference) 108105197Ssam * in reference count field. they are ready to be freed. reference from 109105197Ssam * SA header will be removed in key_delsav(), when the reference count 110105197Ssam * field hits 0 (= no external reference other than from SA header. 111105197Ssam */ 112105197Ssam 113105197Ssamu_int32_t key_debug_level = 0; 114105197Ssamstatic u_int key_spi_trycnt = 1000; 115105197Ssamstatic u_int32_t key_spi_minval = 0x100; 116105197Ssamstatic u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 117105197Ssamstatic u_int32_t policy_id = 0; 118105197Ssamstatic u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 119105197Ssamstatic u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 120105197Ssamstatic int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 121105197Ssamstatic int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 122125876Sguidostatic int key_preferred_oldsa = 1; /* preferred old sa rather than new sa.*/ 123105197Ssam 124105197Ssamstatic u_int32_t acq_seq = 0; 125105197Ssam 126105197Ssamstatic LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */ 127119643Ssamstatic struct mtx sptree_lock; 128120585Ssam#define SPTREE_LOCK_INIT() \ 129120585Ssam mtx_init(&sptree_lock, "sptree", \ 130120585Ssam "fast ipsec security policy database", MTX_DEF) 131120585Ssam#define SPTREE_LOCK_DESTROY() mtx_destroy(&sptree_lock) 132120585Ssam#define SPTREE_LOCK() mtx_lock(&sptree_lock) 133120585Ssam#define SPTREE_UNLOCK() mtx_unlock(&sptree_lock) 134120585Ssam#define SPTREE_LOCK_ASSERT() mtx_assert(&sptree_lock, MA_OWNED) 135120585Ssam 136105197Ssamstatic LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */ 137119643Ssamstatic struct mtx sahtree_lock; 138120585Ssam#define SAHTREE_LOCK_INIT() \ 139120585Ssam mtx_init(&sahtree_lock, "sahtree", \ 140120585Ssam "fast ipsec security association database", MTX_DEF) 141120585Ssam#define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock) 142120585Ssam#define SAHTREE_LOCK() mtx_lock(&sahtree_lock) 143120585Ssam#define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock) 144120585Ssam#define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED) 145120585Ssam 146119643Ssam /* registed list */ 147105197Ssamstatic LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1]; 148119643Ssamstatic struct mtx regtree_lock; 149120585Ssam#define REGTREE_LOCK_INIT() \ 150120585Ssam mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF) 151120585Ssam#define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock) 152120585Ssam#define REGTREE_LOCK() mtx_lock(®tree_lock) 153120585Ssam#define REGTREE_UNLOCK() mtx_unlock(®tree_lock) 154120585Ssam#define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED) 155120585Ssam 156105197Ssamstatic LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */ 157119643Ssamstatic struct mtx acq_lock; 158120585Ssam#define ACQ_LOCK_INIT() \ 159120585Ssam mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF) 160120585Ssam#define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock) 161120585Ssam#define ACQ_LOCK() mtx_lock(&acq_lock) 162120585Ssam#define ACQ_UNLOCK() mtx_unlock(&acq_lock) 163120585Ssam#define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED) 164120585Ssam 165105197Ssamstatic LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */ 166119643Ssamstatic struct mtx spacq_lock; 167120585Ssam#define SPACQ_LOCK_INIT() \ 168120585Ssam mtx_init(&spacq_lock, "spacqtree", \ 169120585Ssam "fast ipsec security policy acquire list", MTX_DEF) 170120585Ssam#define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock) 171120585Ssam#define SPACQ_LOCK() mtx_lock(&spacq_lock) 172120585Ssam#define SPACQ_UNLOCK() mtx_unlock(&spacq_lock) 173120585Ssam#define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED) 174105197Ssam 175105197Ssam/* search order for SAs */ 176105197Ssamstatic u_int saorder_state_valid[] = { 177105197Ssam SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 178105197Ssam /* 179108533Sschweikh * This order is important because we must select the oldest SA 180105197Ssam * for outbound processing. For inbound, This is not important. 181105197Ssam */ 182105197Ssam}; 183105197Ssamstatic u_int saorder_state_alive[] = { 184105197Ssam /* except DEAD */ 185105197Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 186105197Ssam}; 187105197Ssamstatic u_int saorder_state_any[] = { 188105197Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 189105197Ssam SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 190105197Ssam}; 191105197Ssam 192105197Ssamstatic const int minsize[] = { 193105197Ssam sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 194105197Ssam sizeof(struct sadb_sa), /* SADB_EXT_SA */ 195105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 196105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 197105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 198105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 199105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 200105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 201105197Ssam sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 202105197Ssam sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 203105197Ssam sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 204105197Ssam sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 205105197Ssam sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 206105197Ssam sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 207105197Ssam sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 208105197Ssam sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 209105197Ssam sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 210105197Ssam 0, /* SADB_X_EXT_KMPRIVATE */ 211105197Ssam sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 212105197Ssam sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 213105197Ssam}; 214105197Ssamstatic const int maxsize[] = { 215105197Ssam sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 216105197Ssam sizeof(struct sadb_sa), /* SADB_EXT_SA */ 217105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 218105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 219105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 220105197Ssam 0, /* SADB_EXT_ADDRESS_SRC */ 221105197Ssam 0, /* SADB_EXT_ADDRESS_DST */ 222105197Ssam 0, /* SADB_EXT_ADDRESS_PROXY */ 223105197Ssam 0, /* SADB_EXT_KEY_AUTH */ 224105197Ssam 0, /* SADB_EXT_KEY_ENCRYPT */ 225105197Ssam 0, /* SADB_EXT_IDENTITY_SRC */ 226105197Ssam 0, /* SADB_EXT_IDENTITY_DST */ 227105197Ssam 0, /* SADB_EXT_SENSITIVITY */ 228105197Ssam 0, /* SADB_EXT_PROPOSAL */ 229105197Ssam 0, /* SADB_EXT_SUPPORTED_AUTH */ 230105197Ssam 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 231105197Ssam sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 232105197Ssam 0, /* SADB_X_EXT_KMPRIVATE */ 233105197Ssam 0, /* SADB_X_EXT_POLICY */ 234105197Ssam sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 235105197Ssam}; 236105197Ssam 237105197Ssamstatic int ipsec_esp_keymin = 256; 238105197Ssamstatic int ipsec_esp_auth = 0; 239105197Ssamstatic int ipsec_ah_keymin = 128; 240105197Ssam 241105197Ssam#ifdef SYSCTL_DECL 242105197SsamSYSCTL_DECL(_net_key); 243105197Ssam#endif 244105197Ssam 245105197SsamSYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 246105197Ssam &key_debug_level, 0, ""); 247105197Ssam 248105197Ssam/* max count of trial for the decision of spi value */ 249105197SsamSYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 250105197Ssam &key_spi_trycnt, 0, ""); 251105197Ssam 252105197Ssam/* minimum spi value to allocate automatically. */ 253105197SsamSYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 254105197Ssam &key_spi_minval, 0, ""); 255105197Ssam 256105197Ssam/* maximun spi value to allocate automatically. */ 257105197SsamSYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 258105197Ssam &key_spi_maxval, 0, ""); 259105197Ssam 260105197Ssam/* interval to initialize randseed */ 261105197SsamSYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 262105197Ssam &key_int_random, 0, ""); 263105197Ssam 264105197Ssam/* lifetime for larval SA */ 265105197SsamSYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 266105197Ssam &key_larval_lifetime, 0, ""); 267105197Ssam 268105197Ssam/* counter for blocking to send SADB_ACQUIRE to IKEd */ 269105197SsamSYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 270105197Ssam &key_blockacq_count, 0, ""); 271105197Ssam 272105197Ssam/* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 273105197SsamSYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 274105197Ssam &key_blockacq_lifetime, 0, ""); 275105197Ssam 276105197Ssam/* ESP auth */ 277105197SsamSYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 278105197Ssam &ipsec_esp_auth, 0, ""); 279105197Ssam 280105197Ssam/* minimum ESP key length */ 281105197SsamSYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 282105197Ssam &ipsec_esp_keymin, 0, ""); 283105197Ssam 284105197Ssam/* minimum AH key length */ 285105197SsamSYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 286105197Ssam &ipsec_ah_keymin, 0, ""); 287105197Ssam 288105197Ssam/* perfered old SA rather than new SA */ 289125876SguidoSYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, preferred_oldsa, CTLFLAG_RW,\ 290125876Sguido &key_preferred_oldsa, 0, ""); 291105197Ssam 292105197Ssam#define __LIST_CHAINED(elm) \ 293105197Ssam (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 294105197Ssam#define LIST_INSERT_TAIL(head, elm, type, field) \ 295105197Ssamdo {\ 296105197Ssam struct type *curelm = LIST_FIRST(head); \ 297105197Ssam if (curelm == NULL) {\ 298105197Ssam LIST_INSERT_HEAD(head, elm, field); \ 299105197Ssam } else { \ 300105197Ssam while (LIST_NEXT(curelm, field)) \ 301105197Ssam curelm = LIST_NEXT(curelm, field);\ 302105197Ssam LIST_INSERT_AFTER(curelm, elm, field);\ 303105197Ssam }\ 304105197Ssam} while (0) 305105197Ssam 306105197Ssam#define KEY_CHKSASTATE(head, sav, name) \ 307105197Ssamdo { \ 308105197Ssam if ((head) != (sav)) { \ 309105197Ssam ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 310105197Ssam (name), (head), (sav))); \ 311105197Ssam continue; \ 312105197Ssam } \ 313105197Ssam} while (0) 314105197Ssam 315105197Ssam#define KEY_CHKSPDIR(head, sp, name) \ 316105197Ssamdo { \ 317105197Ssam if ((head) != (sp)) { \ 318105197Ssam ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 319105197Ssam "anyway continue.\n", \ 320105197Ssam (name), (head), (sp))); \ 321105197Ssam } \ 322105197Ssam} while (0) 323105197Ssam 324119643SsamMALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association"); 325119643SsamMALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head"); 326119643SsamMALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy"); 327119643SsamMALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request"); 328119643SsamMALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous"); 329119643SsamMALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire"); 330119643SsamMALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire"); 331105197Ssam 332105197Ssam/* 333105197Ssam * set parameters into secpolicyindex buffer. 334105197Ssam * Must allocate secpolicyindex buffer passed to this function. 335105197Ssam */ 336105197Ssam#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 337105197Ssamdo { \ 338105197Ssam bzero((idx), sizeof(struct secpolicyindex)); \ 339105197Ssam (idx)->dir = (_dir); \ 340105197Ssam (idx)->prefs = (ps); \ 341105197Ssam (idx)->prefd = (pd); \ 342105197Ssam (idx)->ul_proto = (ulp); \ 343105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 344105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 345105197Ssam} while (0) 346105197Ssam 347105197Ssam/* 348105197Ssam * set parameters into secasindex buffer. 349105197Ssam * Must allocate secasindex buffer before calling this function. 350105197Ssam */ 351105197Ssam#define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 352105197Ssamdo { \ 353105197Ssam bzero((idx), sizeof(struct secasindex)); \ 354105197Ssam (idx)->proto = (p); \ 355105197Ssam (idx)->mode = (m); \ 356105197Ssam (idx)->reqid = (r); \ 357105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 358105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 359105197Ssam} while (0) 360105197Ssam 361105197Ssam/* key statistics */ 362105197Ssamstruct _keystat { 363105197Ssam u_long getspi_count; /* the avarage of count to try to get new SPI */ 364105197Ssam} keystat; 365105197Ssam 366105197Ssamstruct sadb_msghdr { 367105197Ssam struct sadb_msg *msg; 368105197Ssam struct sadb_ext *ext[SADB_EXT_MAX + 1]; 369105197Ssam int extoff[SADB_EXT_MAX + 1]; 370105197Ssam int extlen[SADB_EXT_MAX + 1]; 371105197Ssam}; 372105197Ssam 373105197Ssamstatic struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 374105197Ssamstatic void key_freesp_so __P((struct secpolicy **)); 375105197Ssamstatic struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 376105197Ssamstatic void key_delsp __P((struct secpolicy *)); 377105197Ssamstatic struct secpolicy *key_getsp __P((struct secpolicyindex *)); 378119643Ssamstatic void _key_delsp(struct secpolicy *sp); 379105197Ssamstatic struct secpolicy *key_getspbyid __P((u_int32_t)); 380105197Ssamstatic u_int32_t key_newreqid __P((void)); 381105197Ssamstatic struct mbuf *key_gather_mbuf __P((struct mbuf *, 382105197Ssam const struct sadb_msghdr *, int, int, ...)); 383105197Ssamstatic int key_spdadd __P((struct socket *, struct mbuf *, 384105197Ssam const struct sadb_msghdr *)); 385105197Ssamstatic u_int32_t key_getnewspid __P((void)); 386105197Ssamstatic int key_spddelete __P((struct socket *, struct mbuf *, 387105197Ssam const struct sadb_msghdr *)); 388105197Ssamstatic int key_spddelete2 __P((struct socket *, struct mbuf *, 389105197Ssam const struct sadb_msghdr *)); 390105197Ssamstatic int key_spdget __P((struct socket *, struct mbuf *, 391105197Ssam const struct sadb_msghdr *)); 392105197Ssamstatic int key_spdflush __P((struct socket *, struct mbuf *, 393105197Ssam const struct sadb_msghdr *)); 394105197Ssamstatic int key_spddump __P((struct socket *, struct mbuf *, 395105197Ssam const struct sadb_msghdr *)); 396105197Ssamstatic struct mbuf *key_setdumpsp __P((struct secpolicy *, 397105197Ssam u_int8_t, u_int32_t, u_int32_t)); 398105197Ssamstatic u_int key_getspreqmsglen __P((struct secpolicy *)); 399105197Ssamstatic int key_spdexpire __P((struct secpolicy *)); 400105197Ssamstatic struct secashead *key_newsah __P((struct secasindex *)); 401105197Ssamstatic void key_delsah __P((struct secashead *)); 402105197Ssamstatic struct secasvar *key_newsav __P((struct mbuf *, 403105197Ssam const struct sadb_msghdr *, struct secashead *, int *, 404105197Ssam const char*, int)); 405105197Ssam#define KEY_NEWSAV(m, sadb, sah, e) \ 406105197Ssam key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 407105197Ssamstatic void key_delsav __P((struct secasvar *)); 408105197Ssamstatic struct secashead *key_getsah __P((struct secasindex *)); 409105197Ssamstatic struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 410105197Ssamstatic struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 411105197Ssamstatic int key_setsaval __P((struct secasvar *, struct mbuf *, 412105197Ssam const struct sadb_msghdr *)); 413105197Ssamstatic int key_mature __P((struct secasvar *)); 414105197Ssamstatic struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 415105197Ssam u_int8_t, u_int32_t, u_int32_t)); 416105197Ssamstatic struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 417105197Ssam u_int32_t, pid_t, u_int16_t)); 418105197Ssamstatic struct mbuf *key_setsadbsa __P((struct secasvar *)); 419105197Ssamstatic struct mbuf *key_setsadbaddr __P((u_int16_t, 420105197Ssam const struct sockaddr *, u_int8_t, u_int16_t)); 421105197Ssamstatic struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); 422105197Ssamstatic struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 423105197Ssam u_int32_t)); 424119643Ssamstatic void *key_dup(const void *, u_int, struct malloc_type *); 425105197Ssam#ifdef INET6 426105197Ssamstatic int key_ismyaddr6 __P((struct sockaddr_in6 *)); 427105197Ssam#endif 428105197Ssam 429105197Ssam/* flags for key_cmpsaidx() */ 430105197Ssam#define CMP_HEAD 1 /* protocol, addresses. */ 431105197Ssam#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 432105197Ssam#define CMP_REQID 3 /* additionally HEAD, reaid. */ 433105197Ssam#define CMP_EXACTLY 4 /* all elements. */ 434105197Ssamstatic int key_cmpsaidx 435105197Ssam __P((const struct secasindex *, const struct secasindex *, int)); 436105197Ssam 437105197Ssamstatic int key_cmpspidx_exactly 438105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 439105197Ssamstatic int key_cmpspidx_withmask 440105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 441105197Ssamstatic int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 442105197Ssamstatic int key_bbcmp __P((const void *, const void *, u_int)); 443105197Ssamstatic u_int16_t key_satype2proto __P((u_int8_t)); 444105197Ssamstatic u_int8_t key_proto2satype __P((u_int16_t)); 445105197Ssam 446105197Ssamstatic int key_getspi __P((struct socket *, struct mbuf *, 447105197Ssam const struct sadb_msghdr *)); 448105197Ssamstatic u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 449105197Ssam struct secasindex *)); 450105197Ssamstatic int key_update __P((struct socket *, struct mbuf *, 451105197Ssam const struct sadb_msghdr *)); 452105197Ssam#ifdef IPSEC_DOSEQCHECK 453105197Ssamstatic struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 454105197Ssam#endif 455105197Ssamstatic int key_add __P((struct socket *, struct mbuf *, 456105197Ssam const struct sadb_msghdr *)); 457105197Ssamstatic int key_setident __P((struct secashead *, struct mbuf *, 458105197Ssam const struct sadb_msghdr *)); 459105197Ssamstatic struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 460105197Ssam const struct sadb_msghdr *)); 461105197Ssamstatic int key_delete __P((struct socket *, struct mbuf *, 462105197Ssam const struct sadb_msghdr *)); 463105197Ssamstatic int key_get __P((struct socket *, struct mbuf *, 464105197Ssam const struct sadb_msghdr *)); 465105197Ssam 466105197Ssamstatic void key_getcomb_setlifetime __P((struct sadb_comb *)); 467105197Ssamstatic struct mbuf *key_getcomb_esp __P((void)); 468105197Ssamstatic struct mbuf *key_getcomb_ah __P((void)); 469105197Ssamstatic struct mbuf *key_getcomb_ipcomp __P((void)); 470105197Ssamstatic struct mbuf *key_getprop __P((const struct secasindex *)); 471105197Ssam 472105197Ssamstatic int key_acquire __P((const struct secasindex *, struct secpolicy *)); 473105197Ssamstatic struct secacq *key_newacq __P((const struct secasindex *)); 474105197Ssamstatic struct secacq *key_getacq __P((const struct secasindex *)); 475105197Ssamstatic struct secacq *key_getacqbyseq __P((u_int32_t)); 476105197Ssamstatic struct secspacq *key_newspacq __P((struct secpolicyindex *)); 477105197Ssamstatic struct secspacq *key_getspacq __P((struct secpolicyindex *)); 478105197Ssamstatic int key_acquire2 __P((struct socket *, struct mbuf *, 479105197Ssam const struct sadb_msghdr *)); 480105197Ssamstatic int key_register __P((struct socket *, struct mbuf *, 481105197Ssam const struct sadb_msghdr *)); 482105197Ssamstatic int key_expire __P((struct secasvar *)); 483105197Ssamstatic int key_flush __P((struct socket *, struct mbuf *, 484105197Ssam const struct sadb_msghdr *)); 485105197Ssamstatic int key_dump __P((struct socket *, struct mbuf *, 486105197Ssam const struct sadb_msghdr *)); 487105197Ssamstatic int key_promisc __P((struct socket *, struct mbuf *, 488105197Ssam const struct sadb_msghdr *)); 489105197Ssamstatic int key_senderror __P((struct socket *, struct mbuf *, int)); 490105197Ssamstatic int key_validate_ext __P((const struct sadb_ext *, int)); 491105197Ssamstatic int key_align __P((struct mbuf *, struct sadb_msghdr *)); 492105197Ssam#if 0 493105197Ssamstatic const char *key_getfqdn __P((void)); 494105197Ssamstatic const char *key_getuserfqdn __P((void)); 495105197Ssam#endif 496105197Ssamstatic void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 497105197Ssamstatic struct mbuf *key_alloc_mbuf __P((int)); 498105197Ssam 499105197Ssam#define SA_ADDREF(p) do { \ 500105197Ssam (p)->refcnt++; \ 501120585Ssam IPSEC_ASSERT((p)->refcnt != 0, ("SA refcnt overflow")); \ 502105197Ssam} while (0) 503105197Ssam#define SA_DELREF(p) do { \ 504120585Ssam IPSEC_ASSERT((p)->refcnt > 0, ("SA refcnt underflow")); \ 505105197Ssam (p)->refcnt--; \ 506105197Ssam} while (0) 507105197Ssam 508105197Ssam#define SP_ADDREF(p) do { \ 509105197Ssam (p)->refcnt++; \ 510120585Ssam IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ 511105197Ssam} while (0) 512105197Ssam#define SP_DELREF(p) do { \ 513120585Ssam IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ 514105197Ssam (p)->refcnt--; \ 515105197Ssam} while (0) 516105197Ssam 517105197Ssam/* 518105197Ssam * Return 0 when there are known to be no SP's for the specified 519105197Ssam * direction. Otherwise return 1. This is used by IPsec code 520105197Ssam * to optimize performance. 521105197Ssam */ 522105197Ssamint 523105197Ssamkey_havesp(u_int dir) 524105197Ssam{ 525105197Ssam return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 526105197Ssam LIST_FIRST(&sptree[dir]) != NULL : 1); 527105197Ssam} 528105197Ssam 529105197Ssam/* %%% IPsec policy management */ 530105197Ssam/* 531105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 532105197Ssam * Must call key_freesp() later. 533105197Ssam * OUT: NULL: not found 534105197Ssam * others: found and return the pointer. 535105197Ssam */ 536105197Ssamstruct secpolicy * 537105197Ssamkey_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 538105197Ssam{ 539105197Ssam struct secpolicy *sp; 540105197Ssam 541120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 542120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 543120585Ssam ("invalid direction %u", dir)); 544105197Ssam 545105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 546120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 547105197Ssam 548105197Ssam /* get a SP entry */ 549105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 550105197Ssam printf("*** objects\n"); 551105197Ssam kdebug_secpolicyindex(spidx)); 552105197Ssam 553120585Ssam SPTREE_LOCK(); 554105197Ssam LIST_FOREACH(sp, &sptree[dir], chain) { 555105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 556105197Ssam printf("*** in SPD\n"); 557105197Ssam kdebug_secpolicyindex(&sp->spidx)); 558105197Ssam 559105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 560105197Ssam continue; 561105197Ssam if (key_cmpspidx_withmask(&sp->spidx, spidx)) 562105197Ssam goto found; 563105197Ssam } 564105197Ssam sp = NULL; 565105197Ssamfound: 566105197Ssam if (sp) { 567105197Ssam /* sanity check */ 568120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 569105197Ssam 570105197Ssam /* found a SPD entry */ 571105197Ssam sp->lastused = time_second; 572105197Ssam SP_ADDREF(sp); 573105197Ssam } 574120585Ssam SPTREE_UNLOCK(); 575105197Ssam 576105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 577120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 578105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 579105197Ssam return sp; 580105197Ssam} 581105197Ssam 582105197Ssam/* 583105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 584105197Ssam * Must call key_freesp() later. 585105197Ssam * OUT: NULL: not found 586105197Ssam * others: found and return the pointer. 587105197Ssam */ 588105197Ssamstruct secpolicy * 589105197Ssamkey_allocsp2(u_int32_t spi, 590105197Ssam union sockaddr_union *dst, 591105197Ssam u_int8_t proto, 592105197Ssam u_int dir, 593105197Ssam const char* where, int tag) 594105197Ssam{ 595105197Ssam struct secpolicy *sp; 596105197Ssam 597120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst")); 598120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 599120585Ssam ("invalid direction %u", dir)); 600105197Ssam 601105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 602120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 603105197Ssam 604105197Ssam /* get a SP entry */ 605105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 606105197Ssam printf("*** objects\n"); 607105197Ssam printf("spi %u proto %u dir %u\n", spi, proto, dir); 608105197Ssam kdebug_sockaddr(&dst->sa)); 609105197Ssam 610120585Ssam SPTREE_LOCK(); 611105197Ssam LIST_FOREACH(sp, &sptree[dir], chain) { 612105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 613105197Ssam printf("*** in SPD\n"); 614105197Ssam kdebug_secpolicyindex(&sp->spidx)); 615105197Ssam 616105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 617105197Ssam continue; 618105197Ssam /* compare simple values, then dst address */ 619105197Ssam if (sp->spidx.ul_proto != proto) 620105197Ssam continue; 621105197Ssam /* NB: spi's must exist and match */ 622105197Ssam if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 623105197Ssam continue; 624105197Ssam if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 625105197Ssam goto found; 626105197Ssam } 627105197Ssam sp = NULL; 628105197Ssamfound: 629105197Ssam if (sp) { 630105197Ssam /* sanity check */ 631120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 632105197Ssam 633105197Ssam /* found a SPD entry */ 634105197Ssam sp->lastused = time_second; 635105197Ssam SP_ADDREF(sp); 636105197Ssam } 637120585Ssam SPTREE_UNLOCK(); 638105197Ssam 639105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 640120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 641105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 642105197Ssam return sp; 643105197Ssam} 644105197Ssam 645105197Ssam/* 646105197Ssam * return a policy that matches this particular inbound packet. 647105197Ssam * XXX slow 648105197Ssam */ 649105197Ssamstruct secpolicy * 650105197Ssamkey_gettunnel(const struct sockaddr *osrc, 651105197Ssam const struct sockaddr *odst, 652105197Ssam const struct sockaddr *isrc, 653105197Ssam const struct sockaddr *idst, 654105197Ssam const char* where, int tag) 655105197Ssam{ 656105197Ssam struct secpolicy *sp; 657105197Ssam const int dir = IPSEC_DIR_INBOUND; 658105197Ssam struct ipsecrequest *r1, *r2, *p; 659105197Ssam struct secpolicyindex spidx; 660105197Ssam 661105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 662120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 663105197Ssam 664105197Ssam if (isrc->sa_family != idst->sa_family) { 665120585Ssam ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", 666120585Ssam __func__, isrc->sa_family, idst->sa_family)); 667105197Ssam sp = NULL; 668105197Ssam goto done; 669105197Ssam } 670105197Ssam 671120585Ssam SPTREE_LOCK(); 672105197Ssam LIST_FOREACH(sp, &sptree[dir], chain) { 673105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 674105197Ssam continue; 675105197Ssam 676105197Ssam r1 = r2 = NULL; 677105197Ssam for (p = sp->req; p; p = p->next) { 678105197Ssam if (p->saidx.mode != IPSEC_MODE_TUNNEL) 679105197Ssam continue; 680105197Ssam 681105197Ssam r1 = r2; 682105197Ssam r2 = p; 683105197Ssam 684105197Ssam if (!r1) { 685105197Ssam /* here we look at address matches only */ 686105197Ssam spidx = sp->spidx; 687105197Ssam if (isrc->sa_len > sizeof(spidx.src) || 688105197Ssam idst->sa_len > sizeof(spidx.dst)) 689105197Ssam continue; 690105197Ssam bcopy(isrc, &spidx.src, isrc->sa_len); 691105197Ssam bcopy(idst, &spidx.dst, idst->sa_len); 692105197Ssam if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 693105197Ssam continue; 694105197Ssam } else { 695105197Ssam if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 696105197Ssam key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 697105197Ssam continue; 698105197Ssam } 699105197Ssam 700105197Ssam if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 701105197Ssam key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 702105197Ssam continue; 703105197Ssam 704105197Ssam goto found; 705105197Ssam } 706105197Ssam } 707105197Ssam sp = NULL; 708105197Ssamfound: 709105197Ssam if (sp) { 710105197Ssam sp->lastused = time_second; 711105197Ssam SP_ADDREF(sp); 712105197Ssam } 713120585Ssam SPTREE_UNLOCK(); 714105197Ssamdone: 715105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 716120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 717105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 718105197Ssam return sp; 719105197Ssam} 720105197Ssam 721105197Ssam/* 722105197Ssam * allocating an SA entry for an *OUTBOUND* packet. 723105197Ssam * checking each request entries in SP, and acquire an SA if need. 724105197Ssam * OUT: 0: there are valid requests. 725105197Ssam * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 726105197Ssam */ 727105197Ssamint 728105197Ssamkey_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 729105197Ssam{ 730105197Ssam u_int level; 731105197Ssam int error; 732105197Ssam 733120585Ssam IPSEC_ASSERT(isr != NULL, ("null isr")); 734120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 735120585Ssam IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 736105197Ssam saidx->mode == IPSEC_MODE_TUNNEL, 737120585Ssam ("unexpected policy %u", saidx->mode)); 738105197Ssam 739105197Ssam /* 740105197Ssam * XXX guard against protocol callbacks from the crypto 741105197Ssam * thread as they reference ipsecrequest.sav which we 742105197Ssam * temporarily null out below. Need to rethink how we 743105197Ssam * handle bundled SA's in the callback thread. 744105197Ssam */ 745120585Ssam IPSECREQUEST_LOCK_ASSERT(isr); 746119643Ssam 747119643Ssam /* get current level */ 748119643Ssam level = ipsec_get_reqlevel(isr); 749105197Ssam#if 0 750105197Ssam /* 751105197Ssam * We do allocate new SA only if the state of SA in the holder is 752105197Ssam * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 753105197Ssam */ 754105197Ssam if (isr->sav != NULL) { 755105197Ssam if (isr->sav->sah == NULL) 756120585Ssam panic("%s: sah is null.\n", __func__); 757105197Ssam if (isr->sav == (struct secasvar *)LIST_FIRST( 758105197Ssam &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 759105197Ssam KEY_FREESAV(&isr->sav); 760105197Ssam isr->sav = NULL; 761105197Ssam } 762105197Ssam } 763105197Ssam#else 764105197Ssam /* 765105197Ssam * we free any SA stashed in the IPsec request because a different 766105197Ssam * SA may be involved each time this request is checked, either 767105197Ssam * because new SAs are being configured, or this request is 768105197Ssam * associated with an unconnected datagram socket, or this request 769105197Ssam * is associated with a system default policy. 770105197Ssam * 771105197Ssam * The operation may have negative impact to performance. We may 772105197Ssam * want to check cached SA carefully, rather than picking new SA 773105197Ssam * every time. 774105197Ssam */ 775105197Ssam if (isr->sav != NULL) { 776105197Ssam KEY_FREESAV(&isr->sav); 777105197Ssam isr->sav = NULL; 778105197Ssam } 779105197Ssam#endif 780105197Ssam 781105197Ssam /* 782105197Ssam * new SA allocation if no SA found. 783105197Ssam * key_allocsa_policy should allocate the oldest SA available. 784105197Ssam * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 785105197Ssam */ 786105197Ssam if (isr->sav == NULL) 787105197Ssam isr->sav = key_allocsa_policy(saidx); 788105197Ssam 789105197Ssam /* When there is SA. */ 790105197Ssam if (isr->sav != NULL) { 791105197Ssam if (isr->sav->state != SADB_SASTATE_MATURE && 792105197Ssam isr->sav->state != SADB_SASTATE_DYING) 793105197Ssam return EINVAL; 794105197Ssam return 0; 795105197Ssam } 796105197Ssam 797105197Ssam /* there is no SA */ 798105197Ssam error = key_acquire(saidx, isr->sp); 799105197Ssam if (error != 0) { 800105197Ssam /* XXX What should I do ? */ 801120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 802120585Ssam __func__, error)); 803105197Ssam return error; 804105197Ssam } 805105197Ssam 806105197Ssam if (level != IPSEC_LEVEL_REQUIRE) { 807105197Ssam /* XXX sigh, the interface to this routine is botched */ 808120585Ssam IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); 809105197Ssam return 0; 810105197Ssam } else { 811105197Ssam return ENOENT; 812105197Ssam } 813105197Ssam} 814105197Ssam 815105197Ssam/* 816105197Ssam * allocating a SA for policy entry from SAD. 817105197Ssam * NOTE: searching SAD of aliving state. 818105197Ssam * OUT: NULL: not found. 819105197Ssam * others: found and return the pointer. 820105197Ssam */ 821105197Ssamstatic struct secasvar * 822105197Ssamkey_allocsa_policy(const struct secasindex *saidx) 823105197Ssam{ 824105197Ssam struct secashead *sah; 825105197Ssam struct secasvar *sav; 826105197Ssam u_int stateidx, state; 827105197Ssam 828120585Ssam SAHTREE_LOCK(); 829105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 830105197Ssam if (sah->state == SADB_SASTATE_DEAD) 831105197Ssam continue; 832119643Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { 833120585Ssam SAHTREE_UNLOCK(); 834105197Ssam goto found; 835119643Ssam } 836105197Ssam } 837120585Ssam SAHTREE_UNLOCK(); 838105197Ssam 839105197Ssam return NULL; 840105197Ssam 841105197Ssam found: 842105197Ssam 843105197Ssam /* search valid state */ 844105197Ssam for (stateidx = 0; 845105197Ssam stateidx < _ARRAYLEN(saorder_state_valid); 846105197Ssam stateidx++) { 847105197Ssam 848105197Ssam state = saorder_state_valid[stateidx]; 849105197Ssam 850105197Ssam sav = key_do_allocsa_policy(sah, state); 851105197Ssam if (sav != NULL) 852105197Ssam return sav; 853105197Ssam } 854105197Ssam 855105197Ssam return NULL; 856105197Ssam} 857105197Ssam 858105197Ssam/* 859105197Ssam * searching SAD with direction, protocol, mode and state. 860105197Ssam * called by key_allocsa_policy(). 861105197Ssam * OUT: 862105197Ssam * NULL : not found 863105197Ssam * others : found, pointer to a SA. 864105197Ssam */ 865105197Ssamstatic struct secasvar * 866105197Ssamkey_do_allocsa_policy(struct secashead *sah, u_int state) 867105197Ssam{ 868105197Ssam struct secasvar *sav, *nextsav, *candidate, *d; 869105197Ssam 870105197Ssam /* initilize */ 871105197Ssam candidate = NULL; 872105197Ssam 873120585Ssam SAHTREE_LOCK(); 874105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 875105197Ssam sav != NULL; 876105197Ssam sav = nextsav) { 877105197Ssam 878105197Ssam nextsav = LIST_NEXT(sav, chain); 879105197Ssam 880105197Ssam /* sanity check */ 881120585Ssam KEY_CHKSASTATE(sav->state, state, __func__); 882105197Ssam 883105197Ssam /* initialize */ 884105197Ssam if (candidate == NULL) { 885105197Ssam candidate = sav; 886105197Ssam continue; 887105197Ssam } 888105197Ssam 889105197Ssam /* Which SA is the better ? */ 890105197Ssam 891120585Ssam IPSEC_ASSERT(candidate->lft_c != NULL, 892120585Ssam ("null candidate lifetime")); 893120585Ssam IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime")); 894105197Ssam 895105197Ssam /* What the best method is to compare ? */ 896125876Sguido if (key_preferred_oldsa) { 897105197Ssam if (candidate->lft_c->sadb_lifetime_addtime > 898105197Ssam sav->lft_c->sadb_lifetime_addtime) { 899105197Ssam candidate = sav; 900105197Ssam } 901105197Ssam continue; 902105197Ssam /*NOTREACHED*/ 903105197Ssam } 904105197Ssam 905125876Sguido /* preferred new sa rather than old sa */ 906105197Ssam if (candidate->lft_c->sadb_lifetime_addtime < 907105197Ssam sav->lft_c->sadb_lifetime_addtime) { 908105197Ssam d = candidate; 909105197Ssam candidate = sav; 910105197Ssam } else 911105197Ssam d = sav; 912105197Ssam 913105197Ssam /* 914105197Ssam * prepared to delete the SA when there is more 915105197Ssam * suitable candidate and the lifetime of the SA is not 916105197Ssam * permanent. 917105197Ssam */ 918105197Ssam if (d->lft_c->sadb_lifetime_addtime != 0) { 919105197Ssam struct mbuf *m, *result; 920125508Ssam u_int8_t satype; 921105197Ssam 922105197Ssam key_sa_chgstate(d, SADB_SASTATE_DEAD); 923105197Ssam 924120585Ssam IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count")); 925125508Ssam 926125508Ssam satype = key_proto2satype(d->sah->saidx.proto); 927125508Ssam if (satype == 0) 928125508Ssam goto msgfail; 929125508Ssam 930105197Ssam m = key_setsadbmsg(SADB_DELETE, 0, 931125508Ssam satype, 0, 0, d->refcnt - 1); 932105197Ssam if (!m) 933105197Ssam goto msgfail; 934105197Ssam result = m; 935105197Ssam 936105197Ssam /* set sadb_address for saidx's. */ 937105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 938105197Ssam &d->sah->saidx.src.sa, 939105197Ssam d->sah->saidx.src.sa.sa_len << 3, 940105197Ssam IPSEC_ULPROTO_ANY); 941105197Ssam if (!m) 942105197Ssam goto msgfail; 943105197Ssam m_cat(result, m); 944105197Ssam 945105197Ssam /* set sadb_address for saidx's. */ 946105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 947105197Ssam &d->sah->saidx.src.sa, 948105197Ssam d->sah->saidx.src.sa.sa_len << 3, 949105197Ssam IPSEC_ULPROTO_ANY); 950105197Ssam if (!m) 951105197Ssam goto msgfail; 952105197Ssam m_cat(result, m); 953105197Ssam 954105197Ssam /* create SA extension */ 955105197Ssam m = key_setsadbsa(d); 956105197Ssam if (!m) 957105197Ssam goto msgfail; 958105197Ssam m_cat(result, m); 959105197Ssam 960105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 961105197Ssam result = m_pullup(result, 962105197Ssam sizeof(struct sadb_msg)); 963105197Ssam if (result == NULL) 964105197Ssam goto msgfail; 965105197Ssam } 966105197Ssam 967105197Ssam result->m_pkthdr.len = 0; 968105197Ssam for (m = result; m; m = m->m_next) 969105197Ssam result->m_pkthdr.len += m->m_len; 970105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 971105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 972105197Ssam 973105197Ssam if (key_sendup_mbuf(NULL, result, 974105197Ssam KEY_SENDUP_REGISTERED)) 975105197Ssam goto msgfail; 976105197Ssam msgfail: 977105197Ssam KEY_FREESAV(&d); 978105197Ssam } 979105197Ssam } 980105197Ssam if (candidate) { 981105197Ssam SA_ADDREF(candidate); 982105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 983120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 984120585Ssam __func__, candidate->refcnt, candidate)); 985105197Ssam } 986120585Ssam SAHTREE_UNLOCK(); 987119643Ssam 988105197Ssam return candidate; 989105197Ssam} 990105197Ssam 991105197Ssam/* 992105197Ssam * allocating a usable SA entry for a *INBOUND* packet. 993105197Ssam * Must call key_freesav() later. 994105197Ssam * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 995105197Ssam * NULL: not found, or error occured. 996105197Ssam * 997105197Ssam * In the comparison, no source address is used--for RFC2401 conformance. 998105197Ssam * To quote, from section 4.1: 999105197Ssam * A security association is uniquely identified by a triple consisting 1000105197Ssam * of a Security Parameter Index (SPI), an IP Destination Address, and a 1001105197Ssam * security protocol (AH or ESP) identifier. 1002105197Ssam * Note that, however, we do need to keep source address in IPsec SA. 1003105197Ssam * IKE specification and PF_KEY specification do assume that we 1004105197Ssam * keep source address in IPsec SA. We see a tricky situation here. 1005105197Ssam */ 1006105197Ssamstruct secasvar * 1007105197Ssamkey_allocsa( 1008105197Ssam union sockaddr_union *dst, 1009105197Ssam u_int proto, 1010105197Ssam u_int32_t spi, 1011105197Ssam const char* where, int tag) 1012105197Ssam{ 1013105197Ssam struct secashead *sah; 1014105197Ssam struct secasvar *sav; 1015105197Ssam u_int stateidx, state; 1016105197Ssam 1017120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst address")); 1018105197Ssam 1019105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1020120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 1021105197Ssam 1022105197Ssam /* 1023105197Ssam * searching SAD. 1024105197Ssam * XXX: to be checked internal IP header somewhere. Also when 1025105197Ssam * IPsec tunnel packet is received. But ESP tunnel mode is 1026105197Ssam * encrypted so we can't check internal IP header. 1027105197Ssam */ 1028120585Ssam SAHTREE_LOCK(); 1029105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 1030105197Ssam /* search valid state */ 1031105197Ssam for (stateidx = 0; 1032105197Ssam stateidx < _ARRAYLEN(saorder_state_valid); 1033105197Ssam stateidx++) { 1034105197Ssam state = saorder_state_valid[stateidx]; 1035105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 1036105197Ssam /* sanity check */ 1037120585Ssam KEY_CHKSASTATE(sav->state, state, __func__); 1038105197Ssam /* do not return entries w/ unusable state */ 1039105197Ssam if (sav->state != SADB_SASTATE_MATURE && 1040105197Ssam sav->state != SADB_SASTATE_DYING) 1041105197Ssam continue; 1042105197Ssam if (proto != sav->sah->saidx.proto) 1043105197Ssam continue; 1044105197Ssam if (spi != sav->spi) 1045105197Ssam continue; 1046105197Ssam#if 0 /* don't check src */ 1047105197Ssam /* check src address */ 1048105197Ssam if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0) 1049105197Ssam continue; 1050105197Ssam#endif 1051105197Ssam /* check dst address */ 1052105197Ssam if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, 0) != 0) 1053105197Ssam continue; 1054105197Ssam SA_ADDREF(sav); 1055105197Ssam goto done; 1056105197Ssam } 1057105197Ssam } 1058105197Ssam } 1059105197Ssam sav = NULL; 1060105197Ssamdone: 1061120585Ssam SAHTREE_UNLOCK(); 1062105197Ssam 1063105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1064120585Ssam printf("DP %s return SA:%p; refcnt %u\n", __func__, 1065105197Ssam sav, sav ? sav->refcnt : 0)); 1066105197Ssam return sav; 1067105197Ssam} 1068105197Ssam 1069105197Ssam/* 1070105197Ssam * Must be called after calling key_allocsp(). 1071105197Ssam * For both the packet without socket and key_freeso(). 1072105197Ssam */ 1073105197Ssamvoid 1074105197Ssam_key_freesp(struct secpolicy **spp, const char* where, int tag) 1075105197Ssam{ 1076105197Ssam struct secpolicy *sp = *spp; 1077105197Ssam 1078120585Ssam IPSEC_ASSERT(sp != NULL, ("null sp")); 1079105197Ssam 1080120585Ssam SPTREE_LOCK(); 1081105197Ssam SP_DELREF(sp); 1082105197Ssam 1083105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1084120585Ssam printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1085120585Ssam __func__, sp, sp->id, where, tag, sp->refcnt)); 1086105197Ssam 1087105197Ssam if (sp->refcnt == 0) { 1088105197Ssam *spp = NULL; 1089105197Ssam key_delsp(sp); 1090105197Ssam } 1091120585Ssam SPTREE_UNLOCK(); 1092105197Ssam} 1093105197Ssam 1094105197Ssam/* 1095105197Ssam * Must be called after calling key_allocsp(). 1096105197Ssam * For the packet with socket. 1097105197Ssam */ 1098105197Ssamvoid 1099105197Ssamkey_freeso(struct socket *so) 1100105197Ssam{ 1101120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 1102105197Ssam 1103105197Ssam switch (so->so_proto->pr_domain->dom_family) { 1104105197Ssam#ifdef INET 1105105197Ssam case PF_INET: 1106105197Ssam { 1107105197Ssam struct inpcb *pcb = sotoinpcb(so); 1108105197Ssam 1109105197Ssam /* Does it have a PCB ? */ 1110105197Ssam if (pcb == NULL) 1111105197Ssam return; 1112105197Ssam key_freesp_so(&pcb->inp_sp->sp_in); 1113105197Ssam key_freesp_so(&pcb->inp_sp->sp_out); 1114105197Ssam } 1115105197Ssam break; 1116105197Ssam#endif 1117105197Ssam#ifdef INET6 1118105197Ssam case PF_INET6: 1119105197Ssam { 1120105197Ssam#ifdef HAVE_NRL_INPCB 1121105197Ssam struct inpcb *pcb = sotoinpcb(so); 1122105197Ssam 1123105197Ssam /* Does it have a PCB ? */ 1124105197Ssam if (pcb == NULL) 1125105197Ssam return; 1126105197Ssam key_freesp_so(&pcb->inp_sp->sp_in); 1127105197Ssam key_freesp_so(&pcb->inp_sp->sp_out); 1128105197Ssam#else 1129105197Ssam struct in6pcb *pcb = sotoin6pcb(so); 1130105197Ssam 1131105197Ssam /* Does it have a PCB ? */ 1132105197Ssam if (pcb == NULL) 1133105197Ssam return; 1134105197Ssam key_freesp_so(&pcb->in6p_sp->sp_in); 1135105197Ssam key_freesp_so(&pcb->in6p_sp->sp_out); 1136105197Ssam#endif 1137105197Ssam } 1138105197Ssam break; 1139105197Ssam#endif /* INET6 */ 1140105197Ssam default: 1141120585Ssam ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n", 1142120585Ssam __func__, so->so_proto->pr_domain->dom_family)); 1143105197Ssam return; 1144105197Ssam } 1145105197Ssam} 1146105197Ssam 1147105197Ssamstatic void 1148105197Ssamkey_freesp_so(struct secpolicy **sp) 1149105197Ssam{ 1150120585Ssam IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp")); 1151105197Ssam 1152105197Ssam if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1153105197Ssam (*sp)->policy == IPSEC_POLICY_BYPASS) 1154105197Ssam return; 1155105197Ssam 1156120585Ssam IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1157120585Ssam ("invalid policy %u", (*sp)->policy)); 1158105197Ssam KEY_FREESP(sp); 1159105197Ssam} 1160105197Ssam 1161105197Ssam/* 1162105197Ssam * Must be called after calling key_allocsa(). 1163105197Ssam * This function is called by key_freesp() to free some SA allocated 1164105197Ssam * for a policy. 1165105197Ssam */ 1166105197Ssamvoid 1167105197Ssamkey_freesav(struct secasvar **psav, const char* where, int tag) 1168105197Ssam{ 1169105197Ssam struct secasvar *sav = *psav; 1170105197Ssam 1171120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 1172105197Ssam 1173120585Ssam /* XXX unguarded? */ 1174105197Ssam SA_DELREF(sav); 1175105197Ssam 1176105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1177120585Ssam printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1178120585Ssam __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1179105197Ssam 1180105197Ssam if (sav->refcnt == 0) { 1181105197Ssam *psav = NULL; 1182105197Ssam key_delsav(sav); 1183105197Ssam } 1184105197Ssam} 1185105197Ssam 1186105197Ssam/* %%% SPD management */ 1187105197Ssam/* 1188105197Ssam * free security policy entry. 1189105197Ssam */ 1190105197Ssamstatic void 1191105197Ssamkey_delsp(struct secpolicy *sp) 1192105197Ssam{ 1193119643Ssam struct ipsecrequest *isr, *nextisr; 1194105197Ssam 1195120585Ssam IPSEC_ASSERT(sp != NULL, ("null sp")); 1196120585Ssam SPTREE_LOCK_ASSERT(); 1197105197Ssam 1198105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 1199105197Ssam 1200120585Ssam IPSEC_ASSERT(sp->refcnt == 0, 1201120585Ssam ("SP with references deleted (refcnt %u)", sp->refcnt)); 1202105197Ssam 1203105197Ssam /* remove from SP index */ 1204105197Ssam if (__LIST_CHAINED(sp)) 1205105197Ssam LIST_REMOVE(sp, chain); 1206105197Ssam 1207119643Ssam for (isr = sp->req; isr != NULL; isr = nextisr) { 1208105197Ssam if (isr->sav != NULL) { 1209105197Ssam KEY_FREESAV(&isr->sav); 1210105197Ssam isr->sav = NULL; 1211105197Ssam } 1212105197Ssam 1213105197Ssam nextisr = isr->next; 1214119643Ssam ipsec_delisr(isr); 1215105197Ssam } 1216119643Ssam _key_delsp(sp); 1217105197Ssam} 1218105197Ssam 1219105197Ssam/* 1220105197Ssam * search SPD 1221105197Ssam * OUT: NULL : not found 1222105197Ssam * others : found, pointer to a SP. 1223105197Ssam */ 1224105197Ssamstatic struct secpolicy * 1225105197Ssamkey_getsp(struct secpolicyindex *spidx) 1226105197Ssam{ 1227105197Ssam struct secpolicy *sp; 1228105197Ssam 1229120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 1230105197Ssam 1231120585Ssam SPTREE_LOCK(); 1232105197Ssam LIST_FOREACH(sp, &sptree[spidx->dir], chain) { 1233105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1234105197Ssam continue; 1235105197Ssam if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1236105197Ssam SP_ADDREF(sp); 1237119643Ssam break; 1238105197Ssam } 1239105197Ssam } 1240120585Ssam SPTREE_UNLOCK(); 1241105197Ssam 1242119643Ssam return sp; 1243105197Ssam} 1244105197Ssam 1245105197Ssam/* 1246105197Ssam * get SP by index. 1247105197Ssam * OUT: NULL : not found 1248105197Ssam * others : found, pointer to a SP. 1249105197Ssam */ 1250105197Ssamstatic struct secpolicy * 1251105197Ssamkey_getspbyid(u_int32_t id) 1252105197Ssam{ 1253105197Ssam struct secpolicy *sp; 1254105197Ssam 1255120585Ssam SPTREE_LOCK(); 1256105197Ssam LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) { 1257105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1258105197Ssam continue; 1259105197Ssam if (sp->id == id) { 1260105197Ssam SP_ADDREF(sp); 1261119643Ssam goto done; 1262105197Ssam } 1263105197Ssam } 1264105197Ssam 1265105197Ssam LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) { 1266105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1267105197Ssam continue; 1268105197Ssam if (sp->id == id) { 1269105197Ssam SP_ADDREF(sp); 1270119643Ssam goto done; 1271105197Ssam } 1272105197Ssam } 1273119643Ssamdone: 1274120585Ssam SPTREE_UNLOCK(); 1275105197Ssam 1276119643Ssam return sp; 1277105197Ssam} 1278105197Ssam 1279105197Ssamstruct secpolicy * 1280105197Ssamkey_newsp(const char* where, int tag) 1281105197Ssam{ 1282105197Ssam struct secpolicy *newsp = NULL; 1283105197Ssam 1284105197Ssam newsp = (struct secpolicy *) 1285119643Ssam malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO); 1286105197Ssam if (newsp) { 1287120585Ssam SECPOLICY_LOCK_INIT(newsp); 1288105197Ssam newsp->refcnt = 1; 1289105197Ssam newsp->req = NULL; 1290105197Ssam } 1291105197Ssam 1292105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1293120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 1294105197Ssam where, tag, newsp)); 1295105197Ssam return newsp; 1296105197Ssam} 1297105197Ssam 1298119643Ssamstatic void 1299119643Ssam_key_delsp(struct secpolicy *sp) 1300119643Ssam{ 1301120585Ssam SECPOLICY_LOCK_DESTROY(sp); 1302119643Ssam free(sp, M_IPSEC_SP); 1303119643Ssam} 1304119643Ssam 1305105197Ssam/* 1306105197Ssam * create secpolicy structure from sadb_x_policy structure. 1307105197Ssam * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1308105197Ssam * so must be set properly later. 1309105197Ssam */ 1310105197Ssamstruct secpolicy * 1311105197Ssamkey_msg2sp(xpl0, len, error) 1312105197Ssam struct sadb_x_policy *xpl0; 1313105197Ssam size_t len; 1314105197Ssam int *error; 1315105197Ssam{ 1316105197Ssam struct secpolicy *newsp; 1317105197Ssam 1318120585Ssam IPSEC_ASSERT(xpl0 != NULL, ("null xpl0")); 1319120585Ssam IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %u", len)); 1320120585Ssam 1321105197Ssam if (len != PFKEY_EXTLEN(xpl0)) { 1322120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__)); 1323105197Ssam *error = EINVAL; 1324105197Ssam return NULL; 1325105197Ssam } 1326105197Ssam 1327105197Ssam if ((newsp = KEY_NEWSP()) == NULL) { 1328105197Ssam *error = ENOBUFS; 1329105197Ssam return NULL; 1330105197Ssam } 1331105197Ssam 1332105197Ssam newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1333105197Ssam newsp->policy = xpl0->sadb_x_policy_type; 1334105197Ssam 1335105197Ssam /* check policy */ 1336105197Ssam switch (xpl0->sadb_x_policy_type) { 1337105197Ssam case IPSEC_POLICY_DISCARD: 1338105197Ssam case IPSEC_POLICY_NONE: 1339105197Ssam case IPSEC_POLICY_ENTRUST: 1340105197Ssam case IPSEC_POLICY_BYPASS: 1341105197Ssam newsp->req = NULL; 1342105197Ssam break; 1343105197Ssam 1344105197Ssam case IPSEC_POLICY_IPSEC: 1345105197Ssam { 1346105197Ssam int tlen; 1347105197Ssam struct sadb_x_ipsecrequest *xisr; 1348105197Ssam struct ipsecrequest **p_isr = &newsp->req; 1349105197Ssam 1350105197Ssam /* validity check */ 1351105197Ssam if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1352120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", 1353120585Ssam __func__)); 1354105197Ssam KEY_FREESP(&newsp); 1355105197Ssam *error = EINVAL; 1356105197Ssam return NULL; 1357105197Ssam } 1358105197Ssam 1359105197Ssam tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1360105197Ssam xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1361105197Ssam 1362105197Ssam while (tlen > 0) { 1363105197Ssam /* length check */ 1364105197Ssam if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1365120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest " 1366120585Ssam "length.\n", __func__)); 1367105197Ssam KEY_FREESP(&newsp); 1368105197Ssam *error = EINVAL; 1369105197Ssam return NULL; 1370105197Ssam } 1371105197Ssam 1372105197Ssam /* allocate request buffer */ 1373119643Ssam /* NB: data structure is zero'd */ 1374119643Ssam *p_isr = ipsec_newisr(); 1375105197Ssam if ((*p_isr) == NULL) { 1376105197Ssam ipseclog((LOG_DEBUG, 1377120585Ssam "%s: No more memory.\n", __func__)); 1378105197Ssam KEY_FREESP(&newsp); 1379105197Ssam *error = ENOBUFS; 1380105197Ssam return NULL; 1381105197Ssam } 1382105197Ssam 1383105197Ssam /* set values */ 1384105197Ssam switch (xisr->sadb_x_ipsecrequest_proto) { 1385105197Ssam case IPPROTO_ESP: 1386105197Ssam case IPPROTO_AH: 1387105197Ssam case IPPROTO_IPCOMP: 1388105197Ssam break; 1389105197Ssam default: 1390105197Ssam ipseclog((LOG_DEBUG, 1391120585Ssam "%s: invalid proto type=%u\n", __func__, 1392105197Ssam xisr->sadb_x_ipsecrequest_proto)); 1393105197Ssam KEY_FREESP(&newsp); 1394105197Ssam *error = EPROTONOSUPPORT; 1395105197Ssam return NULL; 1396105197Ssam } 1397105197Ssam (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1398105197Ssam 1399105197Ssam switch (xisr->sadb_x_ipsecrequest_mode) { 1400105197Ssam case IPSEC_MODE_TRANSPORT: 1401105197Ssam case IPSEC_MODE_TUNNEL: 1402105197Ssam break; 1403105197Ssam case IPSEC_MODE_ANY: 1404105197Ssam default: 1405105197Ssam ipseclog((LOG_DEBUG, 1406120585Ssam "%s: invalid mode=%u\n", __func__, 1407105197Ssam xisr->sadb_x_ipsecrequest_mode)); 1408105197Ssam KEY_FREESP(&newsp); 1409105197Ssam *error = EINVAL; 1410105197Ssam return NULL; 1411105197Ssam } 1412105197Ssam (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1413105197Ssam 1414105197Ssam switch (xisr->sadb_x_ipsecrequest_level) { 1415105197Ssam case IPSEC_LEVEL_DEFAULT: 1416105197Ssam case IPSEC_LEVEL_USE: 1417105197Ssam case IPSEC_LEVEL_REQUIRE: 1418105197Ssam break; 1419105197Ssam case IPSEC_LEVEL_UNIQUE: 1420105197Ssam /* validity check */ 1421105197Ssam /* 1422105197Ssam * If range violation of reqid, kernel will 1423105197Ssam * update it, don't refuse it. 1424105197Ssam */ 1425105197Ssam if (xisr->sadb_x_ipsecrequest_reqid 1426105197Ssam > IPSEC_MANUAL_REQID_MAX) { 1427105197Ssam ipseclog((LOG_DEBUG, 1428120585Ssam "%s: reqid=%d range " 1429105197Ssam "violation, updated by kernel.\n", 1430120585Ssam __func__, 1431105197Ssam xisr->sadb_x_ipsecrequest_reqid)); 1432105197Ssam xisr->sadb_x_ipsecrequest_reqid = 0; 1433105197Ssam } 1434105197Ssam 1435105197Ssam /* allocate new reqid id if reqid is zero. */ 1436105197Ssam if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1437105197Ssam u_int32_t reqid; 1438105197Ssam if ((reqid = key_newreqid()) == 0) { 1439105197Ssam KEY_FREESP(&newsp); 1440105197Ssam *error = ENOBUFS; 1441105197Ssam return NULL; 1442105197Ssam } 1443105197Ssam (*p_isr)->saidx.reqid = reqid; 1444105197Ssam xisr->sadb_x_ipsecrequest_reqid = reqid; 1445105197Ssam } else { 1446105197Ssam /* set it for manual keying. */ 1447105197Ssam (*p_isr)->saidx.reqid = 1448105197Ssam xisr->sadb_x_ipsecrequest_reqid; 1449105197Ssam } 1450105197Ssam break; 1451105197Ssam 1452105197Ssam default: 1453120585Ssam ipseclog((LOG_DEBUG, "%s: invalid level=%u\n", 1454120585Ssam __func__, 1455105197Ssam xisr->sadb_x_ipsecrequest_level)); 1456105197Ssam KEY_FREESP(&newsp); 1457105197Ssam *error = EINVAL; 1458105197Ssam return NULL; 1459105197Ssam } 1460105197Ssam (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1461105197Ssam 1462105197Ssam /* set IP addresses if there */ 1463105197Ssam if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1464105197Ssam struct sockaddr *paddr; 1465105197Ssam 1466105197Ssam paddr = (struct sockaddr *)(xisr + 1); 1467105197Ssam 1468105197Ssam /* validity check */ 1469105197Ssam if (paddr->sa_len 1470105197Ssam > sizeof((*p_isr)->saidx.src)) { 1471120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 1472120585Ssam "request address length.\n", 1473120585Ssam __func__)); 1474105197Ssam KEY_FREESP(&newsp); 1475105197Ssam *error = EINVAL; 1476105197Ssam return NULL; 1477105197Ssam } 1478105197Ssam bcopy(paddr, &(*p_isr)->saidx.src, 1479105197Ssam paddr->sa_len); 1480105197Ssam 1481105197Ssam paddr = (struct sockaddr *)((caddr_t)paddr 1482105197Ssam + paddr->sa_len); 1483105197Ssam 1484105197Ssam /* validity check */ 1485105197Ssam if (paddr->sa_len 1486105197Ssam > sizeof((*p_isr)->saidx.dst)) { 1487120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 1488120585Ssam "request address length.\n", 1489120585Ssam __func__)); 1490105197Ssam KEY_FREESP(&newsp); 1491105197Ssam *error = EINVAL; 1492105197Ssam return NULL; 1493105197Ssam } 1494105197Ssam bcopy(paddr, &(*p_isr)->saidx.dst, 1495105197Ssam paddr->sa_len); 1496105197Ssam } 1497105197Ssam 1498105197Ssam (*p_isr)->sp = newsp; 1499105197Ssam 1500105197Ssam /* initialization for the next. */ 1501105197Ssam p_isr = &(*p_isr)->next; 1502105197Ssam tlen -= xisr->sadb_x_ipsecrequest_len; 1503105197Ssam 1504105197Ssam /* validity check */ 1505105197Ssam if (tlen < 0) { 1506120585Ssam ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n", 1507120585Ssam __func__)); 1508105197Ssam KEY_FREESP(&newsp); 1509105197Ssam *error = EINVAL; 1510105197Ssam return NULL; 1511105197Ssam } 1512105197Ssam 1513105197Ssam xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr 1514105197Ssam + xisr->sadb_x_ipsecrequest_len); 1515105197Ssam } 1516105197Ssam } 1517105197Ssam break; 1518105197Ssam default: 1519120585Ssam ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); 1520105197Ssam KEY_FREESP(&newsp); 1521105197Ssam *error = EINVAL; 1522105197Ssam return NULL; 1523105197Ssam } 1524105197Ssam 1525105197Ssam *error = 0; 1526105197Ssam return newsp; 1527105197Ssam} 1528105197Ssam 1529105197Ssamstatic u_int32_t 1530105197Ssamkey_newreqid() 1531105197Ssam{ 1532105197Ssam static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1533105197Ssam 1534105197Ssam auto_reqid = (auto_reqid == ~0 1535105197Ssam ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1536105197Ssam 1537105197Ssam /* XXX should be unique check */ 1538105197Ssam 1539105197Ssam return auto_reqid; 1540105197Ssam} 1541105197Ssam 1542105197Ssam/* 1543105197Ssam * copy secpolicy struct to sadb_x_policy structure indicated. 1544105197Ssam */ 1545105197Ssamstruct mbuf * 1546105197Ssamkey_sp2msg(sp) 1547105197Ssam struct secpolicy *sp; 1548105197Ssam{ 1549105197Ssam struct sadb_x_policy *xpl; 1550105197Ssam int tlen; 1551105197Ssam caddr_t p; 1552105197Ssam struct mbuf *m; 1553105197Ssam 1554120585Ssam IPSEC_ASSERT(sp != NULL, ("null policy")); 1555105197Ssam 1556105197Ssam tlen = key_getspreqmsglen(sp); 1557105197Ssam 1558105197Ssam m = key_alloc_mbuf(tlen); 1559105197Ssam if (!m || m->m_next) { /*XXX*/ 1560105197Ssam if (m) 1561105197Ssam m_freem(m); 1562105197Ssam return NULL; 1563105197Ssam } 1564105197Ssam 1565105197Ssam m->m_len = tlen; 1566105197Ssam m->m_next = NULL; 1567105197Ssam xpl = mtod(m, struct sadb_x_policy *); 1568105197Ssam bzero(xpl, tlen); 1569105197Ssam 1570105197Ssam xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1571105197Ssam xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1572105197Ssam xpl->sadb_x_policy_type = sp->policy; 1573105197Ssam xpl->sadb_x_policy_dir = sp->spidx.dir; 1574105197Ssam xpl->sadb_x_policy_id = sp->id; 1575105197Ssam p = (caddr_t)xpl + sizeof(*xpl); 1576105197Ssam 1577105197Ssam /* if is the policy for ipsec ? */ 1578105197Ssam if (sp->policy == IPSEC_POLICY_IPSEC) { 1579105197Ssam struct sadb_x_ipsecrequest *xisr; 1580105197Ssam struct ipsecrequest *isr; 1581105197Ssam 1582105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 1583105197Ssam 1584105197Ssam xisr = (struct sadb_x_ipsecrequest *)p; 1585105197Ssam 1586105197Ssam xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1587105197Ssam xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1588105197Ssam xisr->sadb_x_ipsecrequest_level = isr->level; 1589105197Ssam xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1590105197Ssam 1591105197Ssam p += sizeof(*xisr); 1592105197Ssam bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1593105197Ssam p += isr->saidx.src.sa.sa_len; 1594105197Ssam bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1595105197Ssam p += isr->saidx.src.sa.sa_len; 1596105197Ssam 1597105197Ssam xisr->sadb_x_ipsecrequest_len = 1598105197Ssam PFKEY_ALIGN8(sizeof(*xisr) 1599105197Ssam + isr->saidx.src.sa.sa_len 1600105197Ssam + isr->saidx.dst.sa.sa_len); 1601105197Ssam } 1602105197Ssam } 1603105197Ssam 1604105197Ssam return m; 1605105197Ssam} 1606105197Ssam 1607105197Ssam/* m will not be freed nor modified */ 1608105197Ssamstatic struct mbuf * 1609105197Ssam#ifdef __STDC__ 1610105197Ssamkey_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1611105197Ssam int ndeep, int nitem, ...) 1612105197Ssam#else 1613105197Ssamkey_gather_mbuf(m, mhp, ndeep, nitem, va_alist) 1614105197Ssam struct mbuf *m; 1615105197Ssam const struct sadb_msghdr *mhp; 1616105197Ssam int ndeep; 1617105197Ssam int nitem; 1618105197Ssam va_dcl 1619105197Ssam#endif 1620105197Ssam{ 1621105197Ssam va_list ap; 1622105197Ssam int idx; 1623105197Ssam int i; 1624105197Ssam struct mbuf *result = NULL, *n; 1625105197Ssam int len; 1626105197Ssam 1627120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1628120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1629105197Ssam 1630105197Ssam va_start(ap, nitem); 1631105197Ssam for (i = 0; i < nitem; i++) { 1632105197Ssam idx = va_arg(ap, int); 1633105197Ssam if (idx < 0 || idx > SADB_EXT_MAX) 1634105197Ssam goto fail; 1635105197Ssam /* don't attempt to pull empty extension */ 1636105197Ssam if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1637105197Ssam continue; 1638105197Ssam if (idx != SADB_EXT_RESERVED && 1639105197Ssam (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1640105197Ssam continue; 1641105197Ssam 1642105197Ssam if (idx == SADB_EXT_RESERVED) { 1643105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1644120585Ssam 1645120585Ssam IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len)); 1646120585Ssam 1647111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 1648105197Ssam if (!n) 1649105197Ssam goto fail; 1650105197Ssam n->m_len = len; 1651105197Ssam n->m_next = NULL; 1652105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), 1653105197Ssam mtod(n, caddr_t)); 1654105197Ssam } else if (i < ndeep) { 1655105197Ssam len = mhp->extlen[idx]; 1656105197Ssam n = key_alloc_mbuf(len); 1657105197Ssam if (!n || n->m_next) { /*XXX*/ 1658105197Ssam if (n) 1659105197Ssam m_freem(n); 1660105197Ssam goto fail; 1661105197Ssam } 1662105197Ssam m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1663105197Ssam mtod(n, caddr_t)); 1664105197Ssam } else { 1665105197Ssam n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1666111119Simp M_DONTWAIT); 1667105197Ssam } 1668105197Ssam if (n == NULL) 1669105197Ssam goto fail; 1670105197Ssam 1671105197Ssam if (result) 1672105197Ssam m_cat(result, n); 1673105197Ssam else 1674105197Ssam result = n; 1675105197Ssam } 1676105197Ssam va_end(ap); 1677105197Ssam 1678105197Ssam if ((result->m_flags & M_PKTHDR) != 0) { 1679105197Ssam result->m_pkthdr.len = 0; 1680105197Ssam for (n = result; n; n = n->m_next) 1681105197Ssam result->m_pkthdr.len += n->m_len; 1682105197Ssam } 1683105197Ssam 1684105197Ssam return result; 1685105197Ssam 1686105197Ssamfail: 1687105197Ssam m_freem(result); 1688105197Ssam return NULL; 1689105197Ssam} 1690105197Ssam 1691105197Ssam/* 1692105197Ssam * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1693108533Sschweikh * add an entry to SP database, when received 1694105197Ssam * <base, address(SD), (lifetime(H),) policy> 1695105197Ssam * from the user(?). 1696105197Ssam * Adding to SP database, 1697105197Ssam * and send 1698105197Ssam * <base, address(SD), (lifetime(H),) policy> 1699105197Ssam * to the socket which was send. 1700105197Ssam * 1701105197Ssam * SPDADD set a unique policy entry. 1702105197Ssam * SPDSETIDX like SPDADD without a part of policy requests. 1703105197Ssam * SPDUPDATE replace a unique policy entry. 1704105197Ssam * 1705105197Ssam * m will always be freed. 1706105197Ssam */ 1707105197Ssamstatic int 1708105197Ssamkey_spdadd(so, m, mhp) 1709105197Ssam struct socket *so; 1710105197Ssam struct mbuf *m; 1711105197Ssam const struct sadb_msghdr *mhp; 1712105197Ssam{ 1713105197Ssam struct sadb_address *src0, *dst0; 1714105197Ssam struct sadb_x_policy *xpl0, *xpl; 1715105197Ssam struct sadb_lifetime *lft = NULL; 1716105197Ssam struct secpolicyindex spidx; 1717105197Ssam struct secpolicy *newsp; 1718105197Ssam int error; 1719105197Ssam 1720120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 1721120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1722120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1723120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 1724105197Ssam 1725105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1726105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1727105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1728105197Ssam ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1729105197Ssam return key_senderror(so, m, EINVAL); 1730105197Ssam } 1731105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1732105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1733105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1734120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1735120585Ssam __func__)); 1736105197Ssam return key_senderror(so, m, EINVAL); 1737105197Ssam } 1738105197Ssam if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1739105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1740105197Ssam < sizeof(struct sadb_lifetime)) { 1741120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1742120585Ssam __func__)); 1743105197Ssam return key_senderror(so, m, EINVAL); 1744105197Ssam } 1745105197Ssam lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1746105197Ssam } 1747105197Ssam 1748105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1749105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1750105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1751105197Ssam 1752105197Ssam /* make secindex */ 1753105197Ssam /* XXX boundary check against sa_len */ 1754105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1755105197Ssam src0 + 1, 1756105197Ssam dst0 + 1, 1757105197Ssam src0->sadb_address_prefixlen, 1758105197Ssam dst0->sadb_address_prefixlen, 1759105197Ssam src0->sadb_address_proto, 1760105197Ssam &spidx); 1761105197Ssam 1762105197Ssam /* checking the direciton. */ 1763105197Ssam switch (xpl0->sadb_x_policy_dir) { 1764105197Ssam case IPSEC_DIR_INBOUND: 1765105197Ssam case IPSEC_DIR_OUTBOUND: 1766105197Ssam break; 1767105197Ssam default: 1768120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 1769105197Ssam mhp->msg->sadb_msg_errno = EINVAL; 1770105197Ssam return 0; 1771105197Ssam } 1772105197Ssam 1773105197Ssam /* check policy */ 1774105197Ssam /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1775105197Ssam if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1776105197Ssam || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1777120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__)); 1778105197Ssam return key_senderror(so, m, EINVAL); 1779105197Ssam } 1780105197Ssam 1781105197Ssam /* policy requests are mandatory when action is ipsec. */ 1782105197Ssam if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1783105197Ssam && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1784105197Ssam && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1785120585Ssam ipseclog((LOG_DEBUG, "%s: some policy requests part required\n", 1786120585Ssam __func__)); 1787105197Ssam return key_senderror(so, m, EINVAL); 1788105197Ssam } 1789105197Ssam 1790105197Ssam /* 1791105197Ssam * checking there is SP already or not. 1792105197Ssam * SPDUPDATE doesn't depend on whether there is a SP or not. 1793105197Ssam * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1794105197Ssam * then error. 1795105197Ssam */ 1796105197Ssam newsp = key_getsp(&spidx); 1797105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1798105197Ssam if (newsp) { 1799105197Ssam newsp->state = IPSEC_SPSTATE_DEAD; 1800105197Ssam KEY_FREESP(&newsp); 1801105197Ssam } 1802105197Ssam } else { 1803105197Ssam if (newsp != NULL) { 1804105197Ssam KEY_FREESP(&newsp); 1805120585Ssam ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", 1806120585Ssam __func__)); 1807105197Ssam return key_senderror(so, m, EEXIST); 1808105197Ssam } 1809105197Ssam } 1810105197Ssam 1811105197Ssam /* allocation new SP entry */ 1812105197Ssam if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1813105197Ssam return key_senderror(so, m, error); 1814105197Ssam } 1815105197Ssam 1816105197Ssam if ((newsp->id = key_getnewspid()) == 0) { 1817119643Ssam _key_delsp(newsp); 1818105197Ssam return key_senderror(so, m, ENOBUFS); 1819105197Ssam } 1820105197Ssam 1821105197Ssam /* XXX boundary check against sa_len */ 1822105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1823105197Ssam src0 + 1, 1824105197Ssam dst0 + 1, 1825105197Ssam src0->sadb_address_prefixlen, 1826105197Ssam dst0->sadb_address_prefixlen, 1827105197Ssam src0->sadb_address_proto, 1828105197Ssam &newsp->spidx); 1829105197Ssam 1830105197Ssam /* sanity check on addr pair */ 1831105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_family != 1832105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_family) { 1833119643Ssam _key_delsp(newsp); 1834105197Ssam return key_senderror(so, m, EINVAL); 1835105197Ssam } 1836105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 1837105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_len) { 1838119643Ssam _key_delsp(newsp); 1839105197Ssam return key_senderror(so, m, EINVAL); 1840105197Ssam } 1841105197Ssam#if 1 1842105197Ssam if (newsp->req && newsp->req->saidx.src.sa.sa_family) { 1843105197Ssam struct sockaddr *sa; 1844105197Ssam sa = (struct sockaddr *)(src0 + 1); 1845105197Ssam if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) { 1846119643Ssam _key_delsp(newsp); 1847105197Ssam return key_senderror(so, m, EINVAL); 1848105197Ssam } 1849105197Ssam } 1850105197Ssam if (newsp->req && newsp->req->saidx.dst.sa.sa_family) { 1851105197Ssam struct sockaddr *sa; 1852105197Ssam sa = (struct sockaddr *)(dst0 + 1); 1853105197Ssam if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) { 1854119643Ssam _key_delsp(newsp); 1855105197Ssam return key_senderror(so, m, EINVAL); 1856105197Ssam } 1857105197Ssam } 1858105197Ssam#endif 1859105197Ssam 1860105197Ssam newsp->created = time_second; 1861105197Ssam newsp->lastused = newsp->created; 1862105197Ssam newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1863105197Ssam newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1864105197Ssam 1865105197Ssam newsp->refcnt = 1; /* do not reclaim until I say I do */ 1866105197Ssam newsp->state = IPSEC_SPSTATE_ALIVE; 1867105197Ssam LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1868105197Ssam 1869105197Ssam /* delete the entry in spacqtree */ 1870105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1871119643Ssam struct secspacq *spacq = key_getspacq(&spidx); 1872119643Ssam if (spacq != NULL) { 1873105197Ssam /* reset counter in order to deletion by timehandler. */ 1874105197Ssam spacq->created = time_second; 1875105197Ssam spacq->count = 0; 1876120585Ssam SPACQ_UNLOCK(); 1877105197Ssam } 1878105197Ssam } 1879105197Ssam 1880105197Ssam { 1881105197Ssam struct mbuf *n, *mpolicy; 1882105197Ssam struct sadb_msg *newmsg; 1883105197Ssam int off; 1884105197Ssam 1885105197Ssam /* create new sadb_msg to reply. */ 1886105197Ssam if (lft) { 1887105197Ssam n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1888105197Ssam SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1889105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1890105197Ssam } else { 1891105197Ssam n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1892105197Ssam SADB_X_EXT_POLICY, 1893105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1894105197Ssam } 1895105197Ssam if (!n) 1896105197Ssam return key_senderror(so, m, ENOBUFS); 1897105197Ssam 1898105197Ssam if (n->m_len < sizeof(*newmsg)) { 1899105197Ssam n = m_pullup(n, sizeof(*newmsg)); 1900105197Ssam if (!n) 1901105197Ssam return key_senderror(so, m, ENOBUFS); 1902105197Ssam } 1903105197Ssam newmsg = mtod(n, struct sadb_msg *); 1904105197Ssam newmsg->sadb_msg_errno = 0; 1905105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1906105197Ssam 1907105197Ssam off = 0; 1908105197Ssam mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1909105197Ssam sizeof(*xpl), &off); 1910105197Ssam if (mpolicy == NULL) { 1911105197Ssam /* n is already freed */ 1912105197Ssam return key_senderror(so, m, ENOBUFS); 1913105197Ssam } 1914105197Ssam xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 1915105197Ssam if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 1916105197Ssam m_freem(n); 1917105197Ssam return key_senderror(so, m, EINVAL); 1918105197Ssam } 1919105197Ssam xpl->sadb_x_policy_id = newsp->id; 1920105197Ssam 1921105197Ssam m_freem(m); 1922105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 1923105197Ssam } 1924105197Ssam} 1925105197Ssam 1926105197Ssam/* 1927105197Ssam * get new policy id. 1928105197Ssam * OUT: 1929105197Ssam * 0: failure. 1930105197Ssam * others: success. 1931105197Ssam */ 1932105197Ssamstatic u_int32_t 1933105197Ssamkey_getnewspid() 1934105197Ssam{ 1935105197Ssam u_int32_t newid = 0; 1936105197Ssam int count = key_spi_trycnt; /* XXX */ 1937105197Ssam struct secpolicy *sp; 1938105197Ssam 1939105197Ssam /* when requesting to allocate spi ranged */ 1940105197Ssam while (count--) { 1941105197Ssam newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 1942105197Ssam 1943105197Ssam if ((sp = key_getspbyid(newid)) == NULL) 1944105197Ssam break; 1945105197Ssam 1946105197Ssam KEY_FREESP(&sp); 1947105197Ssam } 1948105197Ssam 1949105197Ssam if (count == 0 || newid == 0) { 1950120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", 1951120585Ssam __func__)); 1952105197Ssam return 0; 1953105197Ssam } 1954105197Ssam 1955105197Ssam return newid; 1956105197Ssam} 1957105197Ssam 1958105197Ssam/* 1959105197Ssam * SADB_SPDDELETE processing 1960105197Ssam * receive 1961105197Ssam * <base, address(SD), policy(*)> 1962105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 1963105197Ssam * and send, 1964105197Ssam * <base, address(SD), policy(*)> 1965105197Ssam * to the ikmpd. 1966105197Ssam * policy(*) including direction of policy. 1967105197Ssam * 1968105197Ssam * m will always be freed. 1969105197Ssam */ 1970105197Ssamstatic int 1971105197Ssamkey_spddelete(so, m, mhp) 1972105197Ssam struct socket *so; 1973105197Ssam struct mbuf *m; 1974105197Ssam const struct sadb_msghdr *mhp; 1975105197Ssam{ 1976105197Ssam struct sadb_address *src0, *dst0; 1977105197Ssam struct sadb_x_policy *xpl0; 1978105197Ssam struct secpolicyindex spidx; 1979105197Ssam struct secpolicy *sp; 1980105197Ssam 1981120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 1982120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1983120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1984120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 1985105197Ssam 1986105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1987105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1988105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1989120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1990120585Ssam __func__)); 1991105197Ssam return key_senderror(so, m, EINVAL); 1992105197Ssam } 1993105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1994105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1995105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1996120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1997120585Ssam __func__)); 1998105197Ssam return key_senderror(so, m, EINVAL); 1999105197Ssam } 2000105197Ssam 2001105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2002105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2003105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2004105197Ssam 2005105197Ssam /* make secindex */ 2006105197Ssam /* XXX boundary check against sa_len */ 2007105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2008105197Ssam src0 + 1, 2009105197Ssam dst0 + 1, 2010105197Ssam src0->sadb_address_prefixlen, 2011105197Ssam dst0->sadb_address_prefixlen, 2012105197Ssam src0->sadb_address_proto, 2013105197Ssam &spidx); 2014105197Ssam 2015105197Ssam /* checking the direciton. */ 2016105197Ssam switch (xpl0->sadb_x_policy_dir) { 2017105197Ssam case IPSEC_DIR_INBOUND: 2018105197Ssam case IPSEC_DIR_OUTBOUND: 2019105197Ssam break; 2020105197Ssam default: 2021120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 2022105197Ssam return key_senderror(so, m, EINVAL); 2023105197Ssam } 2024105197Ssam 2025105197Ssam /* Is there SP in SPD ? */ 2026105197Ssam if ((sp = key_getsp(&spidx)) == NULL) { 2027120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); 2028105197Ssam return key_senderror(so, m, EINVAL); 2029105197Ssam } 2030105197Ssam 2031105197Ssam /* save policy id to buffer to be returned. */ 2032105197Ssam xpl0->sadb_x_policy_id = sp->id; 2033105197Ssam 2034105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2035120585Ssam SECPOLICY_LOCK_DESTROY(sp); 2036105197Ssam KEY_FREESP(&sp); 2037105197Ssam 2038105197Ssam { 2039105197Ssam struct mbuf *n; 2040105197Ssam struct sadb_msg *newmsg; 2041105197Ssam 2042105197Ssam /* create new sadb_msg to reply. */ 2043105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2044105197Ssam SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2045105197Ssam if (!n) 2046105197Ssam return key_senderror(so, m, ENOBUFS); 2047105197Ssam 2048105197Ssam newmsg = mtod(n, struct sadb_msg *); 2049105197Ssam newmsg->sadb_msg_errno = 0; 2050105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2051105197Ssam 2052105197Ssam m_freem(m); 2053105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2054105197Ssam } 2055105197Ssam} 2056105197Ssam 2057105197Ssam/* 2058105197Ssam * SADB_SPDDELETE2 processing 2059105197Ssam * receive 2060105197Ssam * <base, policy(*)> 2061105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2062105197Ssam * and send, 2063105197Ssam * <base, policy(*)> 2064105197Ssam * to the ikmpd. 2065105197Ssam * policy(*) including direction of policy. 2066105197Ssam * 2067105197Ssam * m will always be freed. 2068105197Ssam */ 2069105197Ssamstatic int 2070105197Ssamkey_spddelete2(so, m, mhp) 2071105197Ssam struct socket *so; 2072105197Ssam struct mbuf *m; 2073105197Ssam const struct sadb_msghdr *mhp; 2074105197Ssam{ 2075105197Ssam u_int32_t id; 2076105197Ssam struct secpolicy *sp; 2077105197Ssam 2078120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2079120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2080120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2081120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2082105197Ssam 2083105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2084105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2085120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); 2086105197Ssam key_senderror(so, m, EINVAL); 2087105197Ssam return 0; 2088105197Ssam } 2089105197Ssam 2090105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2091105197Ssam 2092105197Ssam /* Is there SP in SPD ? */ 2093105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2094120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2095105197Ssam key_senderror(so, m, EINVAL); 2096105197Ssam } 2097105197Ssam 2098105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2099120585Ssam SECPOLICY_LOCK_DESTROY(sp); 2100105197Ssam KEY_FREESP(&sp); 2101105197Ssam 2102105197Ssam { 2103105197Ssam struct mbuf *n, *nn; 2104105197Ssam struct sadb_msg *newmsg; 2105105197Ssam int off, len; 2106105197Ssam 2107105197Ssam /* create new sadb_msg to reply. */ 2108105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2109105197Ssam 2110105197Ssam if (len > MCLBYTES) 2111105197Ssam return key_senderror(so, m, ENOBUFS); 2112111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 2113105197Ssam if (n && len > MHLEN) { 2114111119Simp MCLGET(n, M_DONTWAIT); 2115105197Ssam if ((n->m_flags & M_EXT) == 0) { 2116105197Ssam m_freem(n); 2117105197Ssam n = NULL; 2118105197Ssam } 2119105197Ssam } 2120105197Ssam if (!n) 2121105197Ssam return key_senderror(so, m, ENOBUFS); 2122105197Ssam 2123105197Ssam n->m_len = len; 2124105197Ssam n->m_next = NULL; 2125105197Ssam off = 0; 2126105197Ssam 2127105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2128105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2129105197Ssam 2130120585Ssam IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)", 2131120585Ssam off, len)); 2132105197Ssam 2133105197Ssam n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2134111119Simp mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2135105197Ssam if (!n->m_next) { 2136105197Ssam m_freem(n); 2137105197Ssam return key_senderror(so, m, ENOBUFS); 2138105197Ssam } 2139105197Ssam 2140105197Ssam n->m_pkthdr.len = 0; 2141105197Ssam for (nn = n; nn; nn = nn->m_next) 2142105197Ssam n->m_pkthdr.len += nn->m_len; 2143105197Ssam 2144105197Ssam newmsg = mtod(n, struct sadb_msg *); 2145105197Ssam newmsg->sadb_msg_errno = 0; 2146105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2147105197Ssam 2148105197Ssam m_freem(m); 2149105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2150105197Ssam } 2151105197Ssam} 2152105197Ssam 2153105197Ssam/* 2154105197Ssam * SADB_X_GET processing 2155105197Ssam * receive 2156105197Ssam * <base, policy(*)> 2157105197Ssam * from the user(?), 2158105197Ssam * and send, 2159105197Ssam * <base, address(SD), policy> 2160105197Ssam * to the ikmpd. 2161105197Ssam * policy(*) including direction of policy. 2162105197Ssam * 2163105197Ssam * m will always be freed. 2164105197Ssam */ 2165105197Ssamstatic int 2166105197Ssamkey_spdget(so, m, mhp) 2167105197Ssam struct socket *so; 2168105197Ssam struct mbuf *m; 2169105197Ssam const struct sadb_msghdr *mhp; 2170105197Ssam{ 2171105197Ssam u_int32_t id; 2172105197Ssam struct secpolicy *sp; 2173105197Ssam struct mbuf *n; 2174105197Ssam 2175120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2176120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2177120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2178120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2179105197Ssam 2180105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2181105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2182120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2183120585Ssam __func__)); 2184105197Ssam return key_senderror(so, m, EINVAL); 2185105197Ssam } 2186105197Ssam 2187105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2188105197Ssam 2189105197Ssam /* Is there SP in SPD ? */ 2190105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2191120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2192105197Ssam return key_senderror(so, m, ENOENT); 2193105197Ssam } 2194105197Ssam 2195105197Ssam n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2196105197Ssam if (n != NULL) { 2197105197Ssam m_freem(m); 2198105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2199105197Ssam } else 2200105197Ssam return key_senderror(so, m, ENOBUFS); 2201105197Ssam} 2202105197Ssam 2203105197Ssam/* 2204105197Ssam * SADB_X_SPDACQUIRE processing. 2205105197Ssam * Acquire policy and SA(s) for a *OUTBOUND* packet. 2206105197Ssam * send 2207105197Ssam * <base, policy(*)> 2208105197Ssam * to KMD, and expect to receive 2209105197Ssam * <base> with SADB_X_SPDACQUIRE if error occured, 2210105197Ssam * or 2211105197Ssam * <base, policy> 2212105197Ssam * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2213105197Ssam * policy(*) is without policy requests. 2214105197Ssam * 2215105197Ssam * 0 : succeed 2216105197Ssam * others: error number 2217105197Ssam */ 2218105197Ssamint 2219105197Ssamkey_spdacquire(sp) 2220105197Ssam struct secpolicy *sp; 2221105197Ssam{ 2222105197Ssam struct mbuf *result = NULL, *m; 2223105197Ssam struct secspacq *newspacq; 2224105197Ssam int error; 2225105197Ssam 2226120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2227120585Ssam IPSEC_ASSERT(sp->req == NULL, ("policy exists")); 2228120585Ssam IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 2229120585Ssam ("policy not IPSEC %u", sp->policy)); 2230105197Ssam 2231108533Sschweikh /* Get an entry to check whether sent message or not. */ 2232119643Ssam newspacq = key_getspacq(&sp->spidx); 2233119643Ssam if (newspacq != NULL) { 2234105197Ssam if (key_blockacq_count < newspacq->count) { 2235105197Ssam /* reset counter and do send message. */ 2236105197Ssam newspacq->count = 0; 2237105197Ssam } else { 2238105197Ssam /* increment counter and do nothing. */ 2239105197Ssam newspacq->count++; 2240105197Ssam return 0; 2241105197Ssam } 2242120585Ssam SPACQ_UNLOCK(); 2243105197Ssam } else { 2244105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 2245119643Ssam newspacq = key_newspacq(&sp->spidx); 2246119643Ssam if (newspacq == NULL) 2247105197Ssam return ENOBUFS; 2248105197Ssam } 2249105197Ssam 2250105197Ssam /* create new sadb_msg to reply. */ 2251105197Ssam m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2252105197Ssam if (!m) { 2253105197Ssam error = ENOBUFS; 2254105197Ssam goto fail; 2255105197Ssam } 2256105197Ssam result = m; 2257105197Ssam 2258105197Ssam result->m_pkthdr.len = 0; 2259105197Ssam for (m = result; m; m = m->m_next) 2260105197Ssam result->m_pkthdr.len += m->m_len; 2261105197Ssam 2262105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2263105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2264105197Ssam 2265105197Ssam return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2266105197Ssam 2267105197Ssamfail: 2268105197Ssam if (result) 2269105197Ssam m_freem(result); 2270105197Ssam return error; 2271105197Ssam} 2272105197Ssam 2273105197Ssam/* 2274105197Ssam * SADB_SPDFLUSH processing 2275105197Ssam * receive 2276105197Ssam * <base> 2277105197Ssam * from the user, and free all entries in secpctree. 2278105197Ssam * and send, 2279105197Ssam * <base> 2280105197Ssam * to the user. 2281105197Ssam * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2282105197Ssam * 2283105197Ssam * m will always be freed. 2284105197Ssam */ 2285105197Ssamstatic int 2286105197Ssamkey_spdflush(so, m, mhp) 2287105197Ssam struct socket *so; 2288105197Ssam struct mbuf *m; 2289105197Ssam const struct sadb_msghdr *mhp; 2290105197Ssam{ 2291105197Ssam struct sadb_msg *newmsg; 2292105197Ssam struct secpolicy *sp; 2293105197Ssam u_int dir; 2294105197Ssam 2295120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2296120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2297120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2298120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2299105197Ssam 2300105197Ssam if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2301105197Ssam return key_senderror(so, m, EINVAL); 2302105197Ssam 2303105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2304120585Ssam SPTREE_LOCK(); 2305120585Ssam LIST_FOREACH(sp, &sptree[dir], chain) 2306105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2307120585Ssam SPTREE_UNLOCK(); 2308105197Ssam } 2309105197Ssam 2310105197Ssam if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2311120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2312105197Ssam return key_senderror(so, m, ENOBUFS); 2313105197Ssam } 2314105197Ssam 2315105197Ssam if (m->m_next) 2316105197Ssam m_freem(m->m_next); 2317105197Ssam m->m_next = NULL; 2318105197Ssam m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2319105197Ssam newmsg = mtod(m, struct sadb_msg *); 2320105197Ssam newmsg->sadb_msg_errno = 0; 2321105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2322105197Ssam 2323105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2324105197Ssam} 2325105197Ssam 2326105197Ssam/* 2327105197Ssam * SADB_SPDDUMP processing 2328105197Ssam * receive 2329105197Ssam * <base> 2330105197Ssam * from the user, and dump all SP leaves 2331105197Ssam * and send, 2332105197Ssam * <base> ..... 2333105197Ssam * to the ikmpd. 2334105197Ssam * 2335105197Ssam * m will always be freed. 2336105197Ssam */ 2337105197Ssamstatic int 2338105197Ssamkey_spddump(so, m, mhp) 2339105197Ssam struct socket *so; 2340105197Ssam struct mbuf *m; 2341105197Ssam const struct sadb_msghdr *mhp; 2342105197Ssam{ 2343105197Ssam struct secpolicy *sp; 2344105197Ssam int cnt; 2345105197Ssam u_int dir; 2346105197Ssam struct mbuf *n; 2347105197Ssam 2348120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2349120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2350120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2351120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2352105197Ssam 2353105197Ssam /* search SPD entry and get buffer size. */ 2354105197Ssam cnt = 0; 2355105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2356105197Ssam LIST_FOREACH(sp, &sptree[dir], chain) { 2357105197Ssam cnt++; 2358105197Ssam } 2359105197Ssam } 2360105197Ssam 2361105197Ssam if (cnt == 0) 2362105197Ssam return key_senderror(so, m, ENOENT); 2363105197Ssam 2364105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2365105197Ssam LIST_FOREACH(sp, &sptree[dir], chain) { 2366105197Ssam --cnt; 2367105197Ssam n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2368105197Ssam mhp->msg->sadb_msg_pid); 2369105197Ssam 2370105197Ssam if (n) 2371105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2372105197Ssam } 2373105197Ssam } 2374105197Ssam 2375105197Ssam m_freem(m); 2376105197Ssam return 0; 2377105197Ssam} 2378105197Ssam 2379105197Ssamstatic struct mbuf * 2380105197Ssamkey_setdumpsp(sp, type, seq, pid) 2381105197Ssam struct secpolicy *sp; 2382105197Ssam u_int8_t type; 2383105197Ssam u_int32_t seq, pid; 2384105197Ssam{ 2385105197Ssam struct mbuf *result = NULL, *m; 2386105197Ssam 2387105197Ssam m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2388105197Ssam if (!m) 2389105197Ssam goto fail; 2390105197Ssam result = m; 2391105197Ssam 2392105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2393105197Ssam &sp->spidx.src.sa, sp->spidx.prefs, 2394105197Ssam sp->spidx.ul_proto); 2395105197Ssam if (!m) 2396105197Ssam goto fail; 2397105197Ssam m_cat(result, m); 2398105197Ssam 2399105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2400105197Ssam &sp->spidx.dst.sa, sp->spidx.prefd, 2401105197Ssam sp->spidx.ul_proto); 2402105197Ssam if (!m) 2403105197Ssam goto fail; 2404105197Ssam m_cat(result, m); 2405105197Ssam 2406105197Ssam m = key_sp2msg(sp); 2407105197Ssam if (!m) 2408105197Ssam goto fail; 2409105197Ssam m_cat(result, m); 2410105197Ssam 2411105197Ssam if ((result->m_flags & M_PKTHDR) == 0) 2412105197Ssam goto fail; 2413105197Ssam 2414105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2415105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2416105197Ssam if (result == NULL) 2417105197Ssam goto fail; 2418105197Ssam } 2419105197Ssam 2420105197Ssam result->m_pkthdr.len = 0; 2421105197Ssam for (m = result; m; m = m->m_next) 2422105197Ssam result->m_pkthdr.len += m->m_len; 2423105197Ssam 2424105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2425105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2426105197Ssam 2427105197Ssam return result; 2428105197Ssam 2429105197Ssamfail: 2430105197Ssam m_freem(result); 2431105197Ssam return NULL; 2432105197Ssam} 2433105197Ssam 2434105197Ssam/* 2435105197Ssam * get PFKEY message length for security policy and request. 2436105197Ssam */ 2437105197Ssamstatic u_int 2438105197Ssamkey_getspreqmsglen(sp) 2439105197Ssam struct secpolicy *sp; 2440105197Ssam{ 2441105197Ssam u_int tlen; 2442105197Ssam 2443105197Ssam tlen = sizeof(struct sadb_x_policy); 2444105197Ssam 2445105197Ssam /* if is the policy for ipsec ? */ 2446105197Ssam if (sp->policy != IPSEC_POLICY_IPSEC) 2447105197Ssam return tlen; 2448105197Ssam 2449105197Ssam /* get length of ipsec requests */ 2450105197Ssam { 2451105197Ssam struct ipsecrequest *isr; 2452105197Ssam int len; 2453105197Ssam 2454105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 2455105197Ssam len = sizeof(struct sadb_x_ipsecrequest) 2456105197Ssam + isr->saidx.src.sa.sa_len 2457105197Ssam + isr->saidx.dst.sa.sa_len; 2458105197Ssam 2459105197Ssam tlen += PFKEY_ALIGN8(len); 2460105197Ssam } 2461105197Ssam } 2462105197Ssam 2463105197Ssam return tlen; 2464105197Ssam} 2465105197Ssam 2466105197Ssam/* 2467105197Ssam * SADB_SPDEXPIRE processing 2468105197Ssam * send 2469105197Ssam * <base, address(SD), lifetime(CH), policy> 2470105197Ssam * to KMD by PF_KEY. 2471105197Ssam * 2472105197Ssam * OUT: 0 : succeed 2473105197Ssam * others : error number 2474105197Ssam */ 2475105197Ssamstatic int 2476105197Ssamkey_spdexpire(sp) 2477105197Ssam struct secpolicy *sp; 2478105197Ssam{ 2479105197Ssam struct mbuf *result = NULL, *m; 2480105197Ssam int len; 2481105197Ssam int error = -1; 2482105197Ssam struct sadb_lifetime *lt; 2483105197Ssam 2484105197Ssam /* XXX: Why do we lock ? */ 2485105197Ssam 2486120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2487105197Ssam 2488105197Ssam /* set msg header */ 2489105197Ssam m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2490105197Ssam if (!m) { 2491105197Ssam error = ENOBUFS; 2492105197Ssam goto fail; 2493105197Ssam } 2494105197Ssam result = m; 2495105197Ssam 2496105197Ssam /* create lifetime extension (current and hard) */ 2497105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2498105197Ssam m = key_alloc_mbuf(len); 2499105197Ssam if (!m || m->m_next) { /*XXX*/ 2500105197Ssam if (m) 2501105197Ssam m_freem(m); 2502105197Ssam error = ENOBUFS; 2503105197Ssam goto fail; 2504105197Ssam } 2505105197Ssam bzero(mtod(m, caddr_t), len); 2506105197Ssam lt = mtod(m, struct sadb_lifetime *); 2507105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2508105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2509105197Ssam lt->sadb_lifetime_allocations = 0; 2510105197Ssam lt->sadb_lifetime_bytes = 0; 2511105197Ssam lt->sadb_lifetime_addtime = sp->created; 2512105197Ssam lt->sadb_lifetime_usetime = sp->lastused; 2513105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2514105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2515105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2516105197Ssam lt->sadb_lifetime_allocations = 0; 2517105197Ssam lt->sadb_lifetime_bytes = 0; 2518105197Ssam lt->sadb_lifetime_addtime = sp->lifetime; 2519105197Ssam lt->sadb_lifetime_usetime = sp->validtime; 2520105197Ssam m_cat(result, m); 2521105197Ssam 2522105197Ssam /* set sadb_address for source */ 2523105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2524105197Ssam &sp->spidx.src.sa, 2525105197Ssam sp->spidx.prefs, sp->spidx.ul_proto); 2526105197Ssam if (!m) { 2527105197Ssam error = ENOBUFS; 2528105197Ssam goto fail; 2529105197Ssam } 2530105197Ssam m_cat(result, m); 2531105197Ssam 2532105197Ssam /* set sadb_address for destination */ 2533105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2534105197Ssam &sp->spidx.dst.sa, 2535105197Ssam sp->spidx.prefd, sp->spidx.ul_proto); 2536105197Ssam if (!m) { 2537105197Ssam error = ENOBUFS; 2538105197Ssam goto fail; 2539105197Ssam } 2540105197Ssam m_cat(result, m); 2541105197Ssam 2542105197Ssam /* set secpolicy */ 2543105197Ssam m = key_sp2msg(sp); 2544105197Ssam if (!m) { 2545105197Ssam error = ENOBUFS; 2546105197Ssam goto fail; 2547105197Ssam } 2548105197Ssam m_cat(result, m); 2549105197Ssam 2550105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 2551105197Ssam error = EINVAL; 2552105197Ssam goto fail; 2553105197Ssam } 2554105197Ssam 2555105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2556105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2557105197Ssam if (result == NULL) { 2558105197Ssam error = ENOBUFS; 2559105197Ssam goto fail; 2560105197Ssam } 2561105197Ssam } 2562105197Ssam 2563105197Ssam result->m_pkthdr.len = 0; 2564105197Ssam for (m = result; m; m = m->m_next) 2565105197Ssam result->m_pkthdr.len += m->m_len; 2566105197Ssam 2567105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2568105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2569105197Ssam 2570105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2571105197Ssam 2572105197Ssam fail: 2573105197Ssam if (result) 2574105197Ssam m_freem(result); 2575105197Ssam return error; 2576105197Ssam} 2577105197Ssam 2578105197Ssam/* %%% SAD management */ 2579105197Ssam/* 2580105197Ssam * allocating a memory for new SA head, and copy from the values of mhp. 2581105197Ssam * OUT: NULL : failure due to the lack of memory. 2582105197Ssam * others : pointer to new SA head. 2583105197Ssam */ 2584105197Ssamstatic struct secashead * 2585105197Ssamkey_newsah(saidx) 2586105197Ssam struct secasindex *saidx; 2587105197Ssam{ 2588105197Ssam struct secashead *newsah; 2589105197Ssam 2590120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2591105197Ssam 2592119643Ssam newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2593105197Ssam if (newsah != NULL) { 2594105197Ssam int i; 2595105197Ssam for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2596105197Ssam LIST_INIT(&newsah->savtree[i]); 2597105197Ssam newsah->saidx = *saidx; 2598105197Ssam 2599105197Ssam /* add to saidxtree */ 2600105197Ssam newsah->state = SADB_SASTATE_MATURE; 2601119643Ssam 2602120585Ssam SAHTREE_LOCK(); 2603105197Ssam LIST_INSERT_HEAD(&sahtree, newsah, chain); 2604120585Ssam SAHTREE_UNLOCK(); 2605105197Ssam } 2606105197Ssam return(newsah); 2607105197Ssam} 2608105197Ssam 2609105197Ssam/* 2610105197Ssam * delete SA index and all SA registerd. 2611105197Ssam */ 2612105197Ssamstatic void 2613105197Ssamkey_delsah(sah) 2614105197Ssam struct secashead *sah; 2615105197Ssam{ 2616105197Ssam struct secasvar *sav, *nextsav; 2617120585Ssam u_int stateidx; 2618105197Ssam int zombie = 0; 2619105197Ssam 2620120585Ssam IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2621120585Ssam SAHTREE_LOCK_ASSERT(); 2622105197Ssam 2623105197Ssam /* searching all SA registerd in the secindex. */ 2624105197Ssam for (stateidx = 0; 2625105197Ssam stateidx < _ARRAYLEN(saorder_state_any); 2626105197Ssam stateidx++) { 2627120585Ssam u_int state = saorder_state_any[stateidx]; 2628120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2629105197Ssam if (sav->refcnt == 0) { 2630105197Ssam /* sanity check */ 2631120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 2632105197Ssam KEY_FREESAV(&sav); 2633105197Ssam } else { 2634105197Ssam /* give up to delete this sa */ 2635105197Ssam zombie++; 2636105197Ssam } 2637105197Ssam } 2638105197Ssam } 2639120585Ssam if (!zombie) { /* delete only if there are savs */ 2640120585Ssam /* remove from tree of SA index */ 2641120585Ssam if (__LIST_CHAINED(sah)) 2642120585Ssam LIST_REMOVE(sah, chain); 2643120585Ssam if (sah->sa_route.ro_rt) { 2644120585Ssam RTFREE(sah->sa_route.ro_rt); 2645120585Ssam sah->sa_route.ro_rt = (struct rtentry *)NULL; 2646120585Ssam } 2647120585Ssam free(sah, M_IPSEC_SAH); 2648105197Ssam } 2649105197Ssam} 2650105197Ssam 2651105197Ssam/* 2652105197Ssam * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2653105197Ssam * and copy the values of mhp into new buffer. 2654105197Ssam * When SAD message type is GETSPI: 2655105197Ssam * to set sequence number from acq_seq++, 2656105197Ssam * to set zero to SPI. 2657105197Ssam * not to call key_setsava(). 2658105197Ssam * OUT: NULL : fail 2659105197Ssam * others : pointer to new secasvar. 2660105197Ssam * 2661105197Ssam * does not modify mbuf. does not free mbuf on error. 2662105197Ssam */ 2663105197Ssamstatic struct secasvar * 2664105197Ssamkey_newsav(m, mhp, sah, errp, where, tag) 2665105197Ssam struct mbuf *m; 2666105197Ssam const struct sadb_msghdr *mhp; 2667105197Ssam struct secashead *sah; 2668105197Ssam int *errp; 2669105197Ssam const char* where; 2670105197Ssam int tag; 2671105197Ssam{ 2672105197Ssam struct secasvar *newsav; 2673105197Ssam const struct sadb_sa *xsa; 2674105197Ssam 2675120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2676120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2677120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2678120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 2679105197Ssam 2680119643Ssam newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2681105197Ssam if (newsav == NULL) { 2682120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2683105197Ssam *errp = ENOBUFS; 2684105197Ssam goto done; 2685105197Ssam } 2686105197Ssam 2687105197Ssam switch (mhp->msg->sadb_msg_type) { 2688105197Ssam case SADB_GETSPI: 2689105197Ssam newsav->spi = 0; 2690105197Ssam 2691105197Ssam#ifdef IPSEC_DOSEQCHECK 2692105197Ssam /* sync sequence number */ 2693105197Ssam if (mhp->msg->sadb_msg_seq == 0) 2694105197Ssam newsav->seq = 2695105197Ssam (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 2696105197Ssam else 2697105197Ssam#endif 2698105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2699105197Ssam break; 2700105197Ssam 2701105197Ssam case SADB_ADD: 2702105197Ssam /* sanity check */ 2703105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 2704119643Ssam free(newsav, M_IPSEC_SA); 2705119643Ssam newsav = NULL; 2706120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2707120585Ssam __func__)); 2708105197Ssam *errp = EINVAL; 2709105197Ssam goto done; 2710105197Ssam } 2711105197Ssam xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2712105197Ssam newsav->spi = xsa->sadb_sa_spi; 2713105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2714105197Ssam break; 2715105197Ssam default: 2716119643Ssam free(newsav, M_IPSEC_SA); 2717119643Ssam newsav = NULL; 2718105197Ssam *errp = EINVAL; 2719105197Ssam goto done; 2720105197Ssam } 2721105197Ssam 2722119643Ssam 2723105197Ssam /* copy sav values */ 2724105197Ssam if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2725105197Ssam *errp = key_setsaval(newsav, m, mhp); 2726105197Ssam if (*errp) { 2727119643Ssam free(newsav, M_IPSEC_SA); 2728119643Ssam newsav = NULL; 2729105197Ssam goto done; 2730105197Ssam } 2731105197Ssam } 2732105197Ssam 2733120585Ssam SECASVAR_LOCK_INIT(newsav); 2734119643Ssam 2735105197Ssam /* reset created */ 2736105197Ssam newsav->created = time_second; 2737105197Ssam newsav->pid = mhp->msg->sadb_msg_pid; 2738105197Ssam 2739105197Ssam /* add to satree */ 2740105197Ssam newsav->sah = sah; 2741105197Ssam newsav->refcnt = 1; 2742105197Ssam newsav->state = SADB_SASTATE_LARVAL; 2743119643Ssam 2744119643Ssam /* XXX locking??? */ 2745105197Ssam LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2746105197Ssam secasvar, chain); 2747105197Ssamdone: 2748105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2749120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 2750105197Ssam where, tag, newsav)); 2751105197Ssam 2752105197Ssam return newsav; 2753105197Ssam} 2754105197Ssam 2755105197Ssam/* 2756105197Ssam * free() SA variable entry. 2757105197Ssam */ 2758105197Ssamstatic void 2759119643Ssamkey_cleansav(struct secasvar *sav) 2760105197Ssam{ 2761117051Ssam /* 2762117051Ssam * Cleanup xform state. Note that zeroize'ing causes the 2763117051Ssam * keys to be cleared; otherwise we must do it ourself. 2764117051Ssam */ 2765117051Ssam if (sav->tdb_xform != NULL) { 2766117051Ssam sav->tdb_xform->xf_zeroize(sav); 2767117051Ssam sav->tdb_xform = NULL; 2768117051Ssam } else { 2769120585Ssam KASSERT(sav->iv == NULL, ("iv but no xform")); 2770117051Ssam if (sav->key_auth != NULL) 2771117051Ssam bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth)); 2772117051Ssam if (sav->key_enc != NULL) 2773117051Ssam bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc)); 2774117051Ssam } 2775105197Ssam if (sav->key_auth != NULL) { 2776119643Ssam free(sav->key_auth, M_IPSEC_MISC); 2777105197Ssam sav->key_auth = NULL; 2778105197Ssam } 2779105197Ssam if (sav->key_enc != NULL) { 2780119643Ssam free(sav->key_enc, M_IPSEC_MISC); 2781105197Ssam sav->key_enc = NULL; 2782105197Ssam } 2783105197Ssam if (sav->sched) { 2784105197Ssam bzero(sav->sched, sav->schedlen); 2785119643Ssam free(sav->sched, M_IPSEC_MISC); 2786105197Ssam sav->sched = NULL; 2787105197Ssam } 2788105197Ssam if (sav->replay != NULL) { 2789119643Ssam free(sav->replay, M_IPSEC_MISC); 2790105197Ssam sav->replay = NULL; 2791105197Ssam } 2792105197Ssam if (sav->lft_c != NULL) { 2793119643Ssam free(sav->lft_c, M_IPSEC_MISC); 2794105197Ssam sav->lft_c = NULL; 2795105197Ssam } 2796105197Ssam if (sav->lft_h != NULL) { 2797119643Ssam free(sav->lft_h, M_IPSEC_MISC); 2798105197Ssam sav->lft_h = NULL; 2799105197Ssam } 2800105197Ssam if (sav->lft_s != NULL) { 2801119643Ssam free(sav->lft_s, M_IPSEC_MISC); 2802105197Ssam sav->lft_s = NULL; 2803105197Ssam } 2804119643Ssam} 2805105197Ssam 2806119643Ssam/* 2807119643Ssam * free() SA variable entry. 2808119643Ssam */ 2809119643Ssamstatic void 2810119643Ssamkey_delsav(sav) 2811119643Ssam struct secasvar *sav; 2812119643Ssam{ 2813120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 2814120585Ssam IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2815105197Ssam 2816119643Ssam /* remove from SA header */ 2817119643Ssam if (__LIST_CHAINED(sav)) 2818119643Ssam LIST_REMOVE(sav, chain); 2819119643Ssam key_cleansav(sav); 2820120585Ssam SECASVAR_LOCK_DESTROY(sav); 2821119643Ssam free(sav, M_IPSEC_SA); 2822105197Ssam} 2823105197Ssam 2824105197Ssam/* 2825105197Ssam * search SAD. 2826105197Ssam * OUT: 2827105197Ssam * NULL : not found 2828105197Ssam * others : found, pointer to a SA. 2829105197Ssam */ 2830105197Ssamstatic struct secashead * 2831105197Ssamkey_getsah(saidx) 2832105197Ssam struct secasindex *saidx; 2833105197Ssam{ 2834105197Ssam struct secashead *sah; 2835105197Ssam 2836120585Ssam SAHTREE_LOCK(); 2837105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 2838105197Ssam if (sah->state == SADB_SASTATE_DEAD) 2839105197Ssam continue; 2840105197Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2841119643Ssam break; 2842105197Ssam } 2843120585Ssam SAHTREE_UNLOCK(); 2844105197Ssam 2845119643Ssam return sah; 2846105197Ssam} 2847105197Ssam 2848105197Ssam/* 2849105197Ssam * check not to be duplicated SPI. 2850105197Ssam * NOTE: this function is too slow due to searching all SAD. 2851105197Ssam * OUT: 2852105197Ssam * NULL : not found 2853105197Ssam * others : found, pointer to a SA. 2854105197Ssam */ 2855105197Ssamstatic struct secasvar * 2856105197Ssamkey_checkspidup(saidx, spi) 2857105197Ssam struct secasindex *saidx; 2858105197Ssam u_int32_t spi; 2859105197Ssam{ 2860105197Ssam struct secashead *sah; 2861105197Ssam struct secasvar *sav; 2862105197Ssam 2863105197Ssam /* check address family */ 2864105197Ssam if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2865120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2866120585Ssam __func__)); 2867105197Ssam return NULL; 2868105197Ssam } 2869105197Ssam 2870119643Ssam sav = NULL; 2871105197Ssam /* check all SAD */ 2872120585Ssam SAHTREE_LOCK(); 2873105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 2874105197Ssam if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 2875105197Ssam continue; 2876105197Ssam sav = key_getsavbyspi(sah, spi); 2877105197Ssam if (sav != NULL) 2878119643Ssam break; 2879105197Ssam } 2880120585Ssam SAHTREE_UNLOCK(); 2881105197Ssam 2882119643Ssam return sav; 2883105197Ssam} 2884105197Ssam 2885105197Ssam/* 2886105197Ssam * search SAD litmited alive SA, protocol, SPI. 2887105197Ssam * OUT: 2888105197Ssam * NULL : not found 2889105197Ssam * others : found, pointer to a SA. 2890105197Ssam */ 2891105197Ssamstatic struct secasvar * 2892105197Ssamkey_getsavbyspi(sah, spi) 2893105197Ssam struct secashead *sah; 2894105197Ssam u_int32_t spi; 2895105197Ssam{ 2896105197Ssam struct secasvar *sav; 2897105197Ssam u_int stateidx, state; 2898105197Ssam 2899119643Ssam sav = NULL; 2900120585Ssam SAHTREE_LOCK_ASSERT(); 2901105197Ssam /* search all status */ 2902105197Ssam for (stateidx = 0; 2903105197Ssam stateidx < _ARRAYLEN(saorder_state_alive); 2904105197Ssam stateidx++) { 2905105197Ssam 2906105197Ssam state = saorder_state_alive[stateidx]; 2907105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 2908105197Ssam 2909105197Ssam /* sanity check */ 2910105197Ssam if (sav->state != state) { 2911120585Ssam ipseclog((LOG_DEBUG, "%s: " 2912105197Ssam "invalid sav->state (queue: %d SA: %d)\n", 2913120585Ssam __func__, state, sav->state)); 2914105197Ssam continue; 2915105197Ssam } 2916105197Ssam 2917105197Ssam if (sav->spi == spi) 2918119643Ssam break; 2919105197Ssam } 2920105197Ssam } 2921105197Ssam 2922119643Ssam return sav; 2923105197Ssam} 2924105197Ssam 2925105197Ssam/* 2926105197Ssam * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 2927105197Ssam * You must update these if need. 2928105197Ssam * OUT: 0: success. 2929105197Ssam * !0: failure. 2930105197Ssam * 2931105197Ssam * does not modify mbuf. does not free mbuf on error. 2932105197Ssam */ 2933105197Ssamstatic int 2934105197Ssamkey_setsaval(sav, m, mhp) 2935105197Ssam struct secasvar *sav; 2936105197Ssam struct mbuf *m; 2937105197Ssam const struct sadb_msghdr *mhp; 2938105197Ssam{ 2939105197Ssam int error = 0; 2940105197Ssam 2941120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2942120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2943120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2944105197Ssam 2945105197Ssam /* initialization */ 2946105197Ssam sav->replay = NULL; 2947105197Ssam sav->key_auth = NULL; 2948105197Ssam sav->key_enc = NULL; 2949105197Ssam sav->sched = NULL; 2950105197Ssam sav->schedlen = 0; 2951105197Ssam sav->iv = NULL; 2952105197Ssam sav->lft_c = NULL; 2953105197Ssam sav->lft_h = NULL; 2954105197Ssam sav->lft_s = NULL; 2955105197Ssam sav->tdb_xform = NULL; /* transform */ 2956105197Ssam sav->tdb_encalgxform = NULL; /* encoding algorithm */ 2957105197Ssam sav->tdb_authalgxform = NULL; /* authentication algorithm */ 2958105197Ssam sav->tdb_compalgxform = NULL; /* compression algorithm */ 2959105197Ssam 2960105197Ssam /* SA */ 2961105197Ssam if (mhp->ext[SADB_EXT_SA] != NULL) { 2962105197Ssam const struct sadb_sa *sa0; 2963105197Ssam 2964105197Ssam sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2965105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 2966105197Ssam error = EINVAL; 2967105197Ssam goto fail; 2968105197Ssam } 2969105197Ssam 2970105197Ssam sav->alg_auth = sa0->sadb_sa_auth; 2971105197Ssam sav->alg_enc = sa0->sadb_sa_encrypt; 2972105197Ssam sav->flags = sa0->sadb_sa_flags; 2973105197Ssam 2974105197Ssam /* replay window */ 2975105197Ssam if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 2976105197Ssam sav->replay = (struct secreplay *) 2977119643Ssam malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 2978105197Ssam if (sav->replay == NULL) { 2979120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 2980120585Ssam __func__)); 2981105197Ssam error = ENOBUFS; 2982105197Ssam goto fail; 2983105197Ssam } 2984105197Ssam if (sa0->sadb_sa_replay != 0) 2985105197Ssam sav->replay->bitmap = (caddr_t)(sav->replay+1); 2986105197Ssam sav->replay->wsize = sa0->sadb_sa_replay; 2987105197Ssam } 2988105197Ssam } 2989105197Ssam 2990105197Ssam /* Authentication keys */ 2991105197Ssam if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 2992105197Ssam const struct sadb_key *key0; 2993105197Ssam int len; 2994105197Ssam 2995105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 2996105197Ssam len = mhp->extlen[SADB_EXT_KEY_AUTH]; 2997105197Ssam 2998105197Ssam error = 0; 2999105197Ssam if (len < sizeof(*key0)) { 3000105197Ssam error = EINVAL; 3001105197Ssam goto fail; 3002105197Ssam } 3003105197Ssam switch (mhp->msg->sadb_msg_satype) { 3004105197Ssam case SADB_SATYPE_AH: 3005105197Ssam case SADB_SATYPE_ESP: 3006125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3007105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3008105197Ssam sav->alg_auth != SADB_X_AALG_NULL) 3009105197Ssam error = EINVAL; 3010105197Ssam break; 3011105197Ssam case SADB_X_SATYPE_IPCOMP: 3012105197Ssam default: 3013105197Ssam error = EINVAL; 3014105197Ssam break; 3015105197Ssam } 3016105197Ssam if (error) { 3017120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3018120585Ssam __func__)); 3019105197Ssam goto fail; 3020105197Ssam } 3021105197Ssam 3022119643Ssam sav->key_auth = key_dup(key0, len, M_IPSEC_MISC); 3023105197Ssam if (sav->key_auth == NULL) { 3024120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3025105197Ssam error = ENOBUFS; 3026105197Ssam goto fail; 3027105197Ssam } 3028105197Ssam } 3029105197Ssam 3030105197Ssam /* Encryption key */ 3031105197Ssam if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3032105197Ssam const struct sadb_key *key0; 3033105197Ssam int len; 3034105197Ssam 3035105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3036105197Ssam len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3037105197Ssam 3038105197Ssam error = 0; 3039105197Ssam if (len < sizeof(*key0)) { 3040105197Ssam error = EINVAL; 3041105197Ssam goto fail; 3042105197Ssam } 3043105197Ssam switch (mhp->msg->sadb_msg_satype) { 3044105197Ssam case SADB_SATYPE_ESP: 3045105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3046105197Ssam sav->alg_enc != SADB_EALG_NULL) { 3047105197Ssam error = EINVAL; 3048105197Ssam break; 3049105197Ssam } 3050119643Ssam sav->key_enc = key_dup(key0, len, M_IPSEC_MISC); 3051105197Ssam if (sav->key_enc == NULL) { 3052120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3053120585Ssam __func__)); 3054105197Ssam error = ENOBUFS; 3055105197Ssam goto fail; 3056105197Ssam } 3057105197Ssam break; 3058105197Ssam case SADB_X_SATYPE_IPCOMP: 3059105197Ssam if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3060105197Ssam error = EINVAL; 3061105197Ssam sav->key_enc = NULL; /*just in case*/ 3062105197Ssam break; 3063105197Ssam case SADB_SATYPE_AH: 3064125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3065105197Ssam default: 3066105197Ssam error = EINVAL; 3067105197Ssam break; 3068105197Ssam } 3069105197Ssam if (error) { 3070120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3071120585Ssam __func__)); 3072105197Ssam goto fail; 3073105197Ssam } 3074105197Ssam } 3075105197Ssam 3076105197Ssam /* set iv */ 3077105197Ssam sav->ivlen = 0; 3078105197Ssam 3079105197Ssam switch (mhp->msg->sadb_msg_satype) { 3080105197Ssam case SADB_SATYPE_AH: 3081105197Ssam error = xform_init(sav, XF_AH); 3082105197Ssam break; 3083105197Ssam case SADB_SATYPE_ESP: 3084105197Ssam error = xform_init(sav, XF_ESP); 3085105197Ssam break; 3086105197Ssam case SADB_X_SATYPE_IPCOMP: 3087105197Ssam error = xform_init(sav, XF_IPCOMP); 3088105197Ssam break; 3089125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3090125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3091125680Sbms break; 3092105197Ssam } 3093105197Ssam if (error) { 3094120585Ssam ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3095120585Ssam __func__, mhp->msg->sadb_msg_satype)); 3096105197Ssam goto fail; 3097105197Ssam } 3098105197Ssam 3099105197Ssam /* reset created */ 3100105197Ssam sav->created = time_second; 3101105197Ssam 3102105197Ssam /* make lifetime for CURRENT */ 3103119643Ssam sav->lft_c = malloc(sizeof(struct sadb_lifetime), M_IPSEC_MISC, M_NOWAIT); 3104105197Ssam if (sav->lft_c == NULL) { 3105120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3106105197Ssam error = ENOBUFS; 3107105197Ssam goto fail; 3108105197Ssam } 3109105197Ssam 3110105197Ssam sav->lft_c->sadb_lifetime_len = 3111105197Ssam PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3112105197Ssam sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3113105197Ssam sav->lft_c->sadb_lifetime_allocations = 0; 3114105197Ssam sav->lft_c->sadb_lifetime_bytes = 0; 3115105197Ssam sav->lft_c->sadb_lifetime_addtime = time_second; 3116105197Ssam sav->lft_c->sadb_lifetime_usetime = 0; 3117105197Ssam 3118105197Ssam /* lifetimes for HARD and SOFT */ 3119105197Ssam { 3120105197Ssam const struct sadb_lifetime *lft0; 3121105197Ssam 3122105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3123105197Ssam if (lft0 != NULL) { 3124105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3125105197Ssam error = EINVAL; 3126105197Ssam goto fail; 3127105197Ssam } 3128119643Ssam sav->lft_h = key_dup(lft0, sizeof(*lft0), M_IPSEC_MISC); 3129105197Ssam if (sav->lft_h == NULL) { 3130120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3131105197Ssam error = ENOBUFS; 3132105197Ssam goto fail; 3133105197Ssam } 3134105197Ssam /* to be initialize ? */ 3135105197Ssam } 3136105197Ssam 3137105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3138105197Ssam if (lft0 != NULL) { 3139105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3140105197Ssam error = EINVAL; 3141105197Ssam goto fail; 3142105197Ssam } 3143119643Ssam sav->lft_s = key_dup(lft0, sizeof(*lft0), M_IPSEC_MISC); 3144105197Ssam if (sav->lft_s == NULL) { 3145120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3146105197Ssam error = ENOBUFS; 3147105197Ssam goto fail; 3148105197Ssam } 3149105197Ssam /* to be initialize ? */ 3150105197Ssam } 3151105197Ssam } 3152105197Ssam 3153105197Ssam return 0; 3154105197Ssam 3155105197Ssam fail: 3156105197Ssam /* initialization */ 3157119643Ssam key_cleansav(sav); 3158105197Ssam 3159105197Ssam return error; 3160105197Ssam} 3161105197Ssam 3162105197Ssam/* 3163105197Ssam * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3164105197Ssam * OUT: 0: valid 3165105197Ssam * other: errno 3166105197Ssam */ 3167105197Ssamstatic int 3168119643Ssamkey_mature(struct secasvar *sav) 3169105197Ssam{ 3170105197Ssam int error; 3171105197Ssam 3172105197Ssam /* check SPI value */ 3173105197Ssam switch (sav->sah->saidx.proto) { 3174105197Ssam case IPPROTO_ESP: 3175105197Ssam case IPPROTO_AH: 3176105197Ssam if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) { 3177120585Ssam ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3178120585Ssam __func__, (u_int32_t)ntohl(sav->spi))); 3179105197Ssam return EINVAL; 3180105197Ssam } 3181105197Ssam break; 3182105197Ssam } 3183105197Ssam 3184105197Ssam /* check satype */ 3185105197Ssam switch (sav->sah->saidx.proto) { 3186105197Ssam case IPPROTO_ESP: 3187105197Ssam /* check flags */ 3188105197Ssam if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3189105197Ssam (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3190120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3191120585Ssam "given to old-esp.\n", __func__)); 3192105197Ssam return EINVAL; 3193105197Ssam } 3194105197Ssam error = xform_init(sav, XF_ESP); 3195105197Ssam break; 3196105197Ssam case IPPROTO_AH: 3197105197Ssam /* check flags */ 3198105197Ssam if (sav->flags & SADB_X_EXT_DERIV) { 3199120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3200120585Ssam "given to AH SA.\n", __func__)); 3201105197Ssam return EINVAL; 3202105197Ssam } 3203105197Ssam if (sav->alg_enc != SADB_EALG_NONE) { 3204120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3205120585Ssam "mismated.\n", __func__)); 3206105197Ssam return(EINVAL); 3207105197Ssam } 3208105197Ssam error = xform_init(sav, XF_AH); 3209105197Ssam break; 3210105197Ssam case IPPROTO_IPCOMP: 3211105197Ssam if (sav->alg_auth != SADB_AALG_NONE) { 3212120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3213120585Ssam "mismated.\n", __func__)); 3214105197Ssam return(EINVAL); 3215105197Ssam } 3216105197Ssam if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3217105197Ssam && ntohl(sav->spi) >= 0x10000) { 3218120585Ssam ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3219120585Ssam __func__)); 3220105197Ssam return(EINVAL); 3221105197Ssam } 3222105197Ssam error = xform_init(sav, XF_IPCOMP); 3223105197Ssam break; 3224125680Sbms case IPPROTO_TCP: 3225125680Sbms if (sav->alg_enc != SADB_EALG_NONE) { 3226125680Sbms ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3227125680Sbms "mismated.\n", __func__)); 3228125680Sbms return(EINVAL); 3229125680Sbms } 3230125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3231125680Sbms break; 3232105197Ssam default: 3233120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3234105197Ssam error = EPROTONOSUPPORT; 3235105197Ssam break; 3236105197Ssam } 3237119643Ssam if (error == 0) { 3238120585Ssam SAHTREE_LOCK(); 3239105197Ssam key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3240120585Ssam SAHTREE_UNLOCK(); 3241119643Ssam } 3242105197Ssam return (error); 3243105197Ssam} 3244105197Ssam 3245105197Ssam/* 3246105197Ssam * subroutine for SADB_GET and SADB_DUMP. 3247105197Ssam */ 3248105197Ssamstatic struct mbuf * 3249105197Ssamkey_setdumpsa(sav, type, satype, seq, pid) 3250105197Ssam struct secasvar *sav; 3251105197Ssam u_int8_t type, satype; 3252105197Ssam u_int32_t seq, pid; 3253105197Ssam{ 3254105197Ssam struct mbuf *result = NULL, *tres = NULL, *m; 3255105197Ssam int l = 0; 3256105197Ssam int i; 3257105197Ssam void *p; 3258105197Ssam int dumporder[] = { 3259105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 3260105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3261105197Ssam SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3262105197Ssam SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3263105197Ssam SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3264105197Ssam SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3265105197Ssam }; 3266105197Ssam 3267105197Ssam m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3268105197Ssam if (m == NULL) 3269105197Ssam goto fail; 3270105197Ssam result = m; 3271105197Ssam 3272105197Ssam for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3273105197Ssam m = NULL; 3274105197Ssam p = NULL; 3275105197Ssam switch (dumporder[i]) { 3276105197Ssam case SADB_EXT_SA: 3277105197Ssam m = key_setsadbsa(sav); 3278105197Ssam if (!m) 3279105197Ssam goto fail; 3280105197Ssam break; 3281105197Ssam 3282105197Ssam case SADB_X_EXT_SA2: 3283105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 3284105197Ssam sav->replay ? sav->replay->count : 0, 3285105197Ssam sav->sah->saidx.reqid); 3286105197Ssam if (!m) 3287105197Ssam goto fail; 3288105197Ssam break; 3289105197Ssam 3290105197Ssam case SADB_EXT_ADDRESS_SRC: 3291105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3292105197Ssam &sav->sah->saidx.src.sa, 3293105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3294105197Ssam if (!m) 3295105197Ssam goto fail; 3296105197Ssam break; 3297105197Ssam 3298105197Ssam case SADB_EXT_ADDRESS_DST: 3299105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3300105197Ssam &sav->sah->saidx.dst.sa, 3301105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3302105197Ssam if (!m) 3303105197Ssam goto fail; 3304105197Ssam break; 3305105197Ssam 3306105197Ssam case SADB_EXT_KEY_AUTH: 3307105197Ssam if (!sav->key_auth) 3308105197Ssam continue; 3309105197Ssam l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3310105197Ssam p = sav->key_auth; 3311105197Ssam break; 3312105197Ssam 3313105197Ssam case SADB_EXT_KEY_ENCRYPT: 3314105197Ssam if (!sav->key_enc) 3315105197Ssam continue; 3316105197Ssam l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3317105197Ssam p = sav->key_enc; 3318105197Ssam break; 3319105197Ssam 3320105197Ssam case SADB_EXT_LIFETIME_CURRENT: 3321105197Ssam if (!sav->lft_c) 3322105197Ssam continue; 3323105197Ssam l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3324105197Ssam p = sav->lft_c; 3325105197Ssam break; 3326105197Ssam 3327105197Ssam case SADB_EXT_LIFETIME_HARD: 3328105197Ssam if (!sav->lft_h) 3329105197Ssam continue; 3330105197Ssam l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3331105197Ssam p = sav->lft_h; 3332105197Ssam break; 3333105197Ssam 3334105197Ssam case SADB_EXT_LIFETIME_SOFT: 3335105197Ssam if (!sav->lft_s) 3336105197Ssam continue; 3337105197Ssam l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3338105197Ssam p = sav->lft_s; 3339105197Ssam break; 3340105197Ssam 3341105197Ssam case SADB_EXT_ADDRESS_PROXY: 3342105197Ssam case SADB_EXT_IDENTITY_SRC: 3343105197Ssam case SADB_EXT_IDENTITY_DST: 3344105197Ssam /* XXX: should we brought from SPD ? */ 3345105197Ssam case SADB_EXT_SENSITIVITY: 3346105197Ssam default: 3347105197Ssam continue; 3348105197Ssam } 3349105197Ssam 3350105197Ssam if ((!m && !p) || (m && p)) 3351105197Ssam goto fail; 3352105197Ssam if (p && tres) { 3353111119Simp M_PREPEND(tres, l, M_DONTWAIT); 3354105197Ssam if (!tres) 3355105197Ssam goto fail; 3356105197Ssam bcopy(p, mtod(tres, caddr_t), l); 3357105197Ssam continue; 3358105197Ssam } 3359105197Ssam if (p) { 3360105197Ssam m = key_alloc_mbuf(l); 3361105197Ssam if (!m) 3362105197Ssam goto fail; 3363105197Ssam m_copyback(m, 0, l, p); 3364105197Ssam } 3365105197Ssam 3366105197Ssam if (tres) 3367105197Ssam m_cat(m, tres); 3368105197Ssam tres = m; 3369105197Ssam } 3370105197Ssam 3371105197Ssam m_cat(result, tres); 3372105197Ssam 3373105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 3374105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 3375105197Ssam if (result == NULL) 3376105197Ssam goto fail; 3377105197Ssam } 3378105197Ssam 3379105197Ssam result->m_pkthdr.len = 0; 3380105197Ssam for (m = result; m; m = m->m_next) 3381105197Ssam result->m_pkthdr.len += m->m_len; 3382105197Ssam 3383105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 3384105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 3385105197Ssam 3386105197Ssam return result; 3387105197Ssam 3388105197Ssamfail: 3389105197Ssam m_freem(result); 3390105197Ssam m_freem(tres); 3391105197Ssam return NULL; 3392105197Ssam} 3393105197Ssam 3394105197Ssam/* 3395105197Ssam * set data into sadb_msg. 3396105197Ssam */ 3397105197Ssamstatic struct mbuf * 3398105197Ssamkey_setsadbmsg(type, tlen, satype, seq, pid, reserved) 3399105197Ssam u_int8_t type, satype; 3400105197Ssam u_int16_t tlen; 3401105197Ssam u_int32_t seq; 3402105197Ssam pid_t pid; 3403105197Ssam u_int16_t reserved; 3404105197Ssam{ 3405105197Ssam struct mbuf *m; 3406105197Ssam struct sadb_msg *p; 3407105197Ssam int len; 3408105197Ssam 3409105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3410105197Ssam if (len > MCLBYTES) 3411105197Ssam return NULL; 3412111119Simp MGETHDR(m, M_DONTWAIT, MT_DATA); 3413105197Ssam if (m && len > MHLEN) { 3414111119Simp MCLGET(m, M_DONTWAIT); 3415105197Ssam if ((m->m_flags & M_EXT) == 0) { 3416105197Ssam m_freem(m); 3417105197Ssam m = NULL; 3418105197Ssam } 3419105197Ssam } 3420105197Ssam if (!m) 3421105197Ssam return NULL; 3422105197Ssam m->m_pkthdr.len = m->m_len = len; 3423105197Ssam m->m_next = NULL; 3424105197Ssam 3425105197Ssam p = mtod(m, struct sadb_msg *); 3426105197Ssam 3427105197Ssam bzero(p, len); 3428105197Ssam p->sadb_msg_version = PF_KEY_V2; 3429105197Ssam p->sadb_msg_type = type; 3430105197Ssam p->sadb_msg_errno = 0; 3431105197Ssam p->sadb_msg_satype = satype; 3432105197Ssam p->sadb_msg_len = PFKEY_UNIT64(tlen); 3433105197Ssam p->sadb_msg_reserved = reserved; 3434105197Ssam p->sadb_msg_seq = seq; 3435105197Ssam p->sadb_msg_pid = (u_int32_t)pid; 3436105197Ssam 3437105197Ssam return m; 3438105197Ssam} 3439105197Ssam 3440105197Ssam/* 3441105197Ssam * copy secasvar data into sadb_address. 3442105197Ssam */ 3443105197Ssamstatic struct mbuf * 3444105197Ssamkey_setsadbsa(sav) 3445105197Ssam struct secasvar *sav; 3446105197Ssam{ 3447105197Ssam struct mbuf *m; 3448105197Ssam struct sadb_sa *p; 3449105197Ssam int len; 3450105197Ssam 3451105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3452105197Ssam m = key_alloc_mbuf(len); 3453105197Ssam if (!m || m->m_next) { /*XXX*/ 3454105197Ssam if (m) 3455105197Ssam m_freem(m); 3456105197Ssam return NULL; 3457105197Ssam } 3458105197Ssam 3459105197Ssam p = mtod(m, struct sadb_sa *); 3460105197Ssam 3461105197Ssam bzero(p, len); 3462105197Ssam p->sadb_sa_len = PFKEY_UNIT64(len); 3463105197Ssam p->sadb_sa_exttype = SADB_EXT_SA; 3464105197Ssam p->sadb_sa_spi = sav->spi; 3465105197Ssam p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3466105197Ssam p->sadb_sa_state = sav->state; 3467105197Ssam p->sadb_sa_auth = sav->alg_auth; 3468105197Ssam p->sadb_sa_encrypt = sav->alg_enc; 3469105197Ssam p->sadb_sa_flags = sav->flags; 3470105197Ssam 3471105197Ssam return m; 3472105197Ssam} 3473105197Ssam 3474105197Ssam/* 3475105197Ssam * set data into sadb_address. 3476105197Ssam */ 3477105197Ssamstatic struct mbuf * 3478105197Ssamkey_setsadbaddr(exttype, saddr, prefixlen, ul_proto) 3479105197Ssam u_int16_t exttype; 3480105197Ssam const struct sockaddr *saddr; 3481105197Ssam u_int8_t prefixlen; 3482105197Ssam u_int16_t ul_proto; 3483105197Ssam{ 3484105197Ssam struct mbuf *m; 3485105197Ssam struct sadb_address *p; 3486105197Ssam size_t len; 3487105197Ssam 3488105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3489105197Ssam PFKEY_ALIGN8(saddr->sa_len); 3490105197Ssam m = key_alloc_mbuf(len); 3491105197Ssam if (!m || m->m_next) { /*XXX*/ 3492105197Ssam if (m) 3493105197Ssam m_freem(m); 3494105197Ssam return NULL; 3495105197Ssam } 3496105197Ssam 3497105197Ssam p = mtod(m, struct sadb_address *); 3498105197Ssam 3499105197Ssam bzero(p, len); 3500105197Ssam p->sadb_address_len = PFKEY_UNIT64(len); 3501105197Ssam p->sadb_address_exttype = exttype; 3502105197Ssam p->sadb_address_proto = ul_proto; 3503105197Ssam if (prefixlen == FULLMASK) { 3504105197Ssam switch (saddr->sa_family) { 3505105197Ssam case AF_INET: 3506105197Ssam prefixlen = sizeof(struct in_addr) << 3; 3507105197Ssam break; 3508105197Ssam case AF_INET6: 3509105197Ssam prefixlen = sizeof(struct in6_addr) << 3; 3510105197Ssam break; 3511105197Ssam default: 3512105197Ssam ; /*XXX*/ 3513105197Ssam } 3514105197Ssam } 3515105197Ssam p->sadb_address_prefixlen = prefixlen; 3516105197Ssam p->sadb_address_reserved = 0; 3517105197Ssam 3518105197Ssam bcopy(saddr, 3519105197Ssam mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3520105197Ssam saddr->sa_len); 3521105197Ssam 3522105197Ssam return m; 3523105197Ssam} 3524105197Ssam 3525105197Ssam/* 3526105197Ssam * set data into sadb_x_sa2. 3527105197Ssam */ 3528105197Ssamstatic struct mbuf * 3529105197Ssamkey_setsadbxsa2(mode, seq, reqid) 3530105197Ssam u_int8_t mode; 3531105197Ssam u_int32_t seq, reqid; 3532105197Ssam{ 3533105197Ssam struct mbuf *m; 3534105197Ssam struct sadb_x_sa2 *p; 3535105197Ssam size_t len; 3536105197Ssam 3537105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3538105197Ssam m = key_alloc_mbuf(len); 3539105197Ssam if (!m || m->m_next) { /*XXX*/ 3540105197Ssam if (m) 3541105197Ssam m_freem(m); 3542105197Ssam return NULL; 3543105197Ssam } 3544105197Ssam 3545105197Ssam p = mtod(m, struct sadb_x_sa2 *); 3546105197Ssam 3547105197Ssam bzero(p, len); 3548105197Ssam p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3549105197Ssam p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3550105197Ssam p->sadb_x_sa2_mode = mode; 3551105197Ssam p->sadb_x_sa2_reserved1 = 0; 3552105197Ssam p->sadb_x_sa2_reserved2 = 0; 3553105197Ssam p->sadb_x_sa2_sequence = seq; 3554105197Ssam p->sadb_x_sa2_reqid = reqid; 3555105197Ssam 3556105197Ssam return m; 3557105197Ssam} 3558105197Ssam 3559105197Ssam/* 3560105197Ssam * set data into sadb_x_policy 3561105197Ssam */ 3562105197Ssamstatic struct mbuf * 3563105197Ssamkey_setsadbxpolicy(type, dir, id) 3564105197Ssam u_int16_t type; 3565105197Ssam u_int8_t dir; 3566105197Ssam u_int32_t id; 3567105197Ssam{ 3568105197Ssam struct mbuf *m; 3569105197Ssam struct sadb_x_policy *p; 3570105197Ssam size_t len; 3571105197Ssam 3572105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3573105197Ssam m = key_alloc_mbuf(len); 3574105197Ssam if (!m || m->m_next) { /*XXX*/ 3575105197Ssam if (m) 3576105197Ssam m_freem(m); 3577105197Ssam return NULL; 3578105197Ssam } 3579105197Ssam 3580105197Ssam p = mtod(m, struct sadb_x_policy *); 3581105197Ssam 3582105197Ssam bzero(p, len); 3583105197Ssam p->sadb_x_policy_len = PFKEY_UNIT64(len); 3584105197Ssam p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3585105197Ssam p->sadb_x_policy_type = type; 3586105197Ssam p->sadb_x_policy_dir = dir; 3587105197Ssam p->sadb_x_policy_id = id; 3588105197Ssam 3589105197Ssam return m; 3590105197Ssam} 3591105197Ssam 3592105197Ssam/* %%% utilities */ 3593105197Ssam/* 3594105197Ssam * copy a buffer into the new buffer allocated. 3595105197Ssam */ 3596105197Ssamstatic void * 3597119643Ssamkey_dup(const void *src, u_int len, struct malloc_type *type) 3598105197Ssam{ 3599119643Ssam void *copy; 3600105197Ssam 3601119643Ssam copy = malloc(len, type, M_NOWAIT); 3602119643Ssam if (copy == NULL) { 3603119643Ssam /* XXX counter */ 3604120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3605119643Ssam } else 3606119643Ssam bcopy(src, copy, len); 3607119643Ssam return copy; 3608105197Ssam} 3609105197Ssam 3610105197Ssam/* compare my own address 3611105197Ssam * OUT: 1: true, i.e. my address. 3612105197Ssam * 0: false 3613105197Ssam */ 3614105197Ssamint 3615105197Ssamkey_ismyaddr(sa) 3616105197Ssam struct sockaddr *sa; 3617105197Ssam{ 3618105197Ssam#ifdef INET 3619105197Ssam struct sockaddr_in *sin; 3620105197Ssam struct in_ifaddr *ia; 3621105197Ssam#endif 3622105197Ssam 3623120585Ssam IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3624105197Ssam 3625105197Ssam switch (sa->sa_family) { 3626105197Ssam#ifdef INET 3627105197Ssam case AF_INET: 3628105197Ssam sin = (struct sockaddr_in *)sa; 3629105197Ssam for (ia = in_ifaddrhead.tqh_first; ia; 3630105197Ssam ia = ia->ia_link.tqe_next) 3631105197Ssam { 3632105197Ssam if (sin->sin_family == ia->ia_addr.sin_family && 3633105197Ssam sin->sin_len == ia->ia_addr.sin_len && 3634105197Ssam sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3635105197Ssam { 3636105197Ssam return 1; 3637105197Ssam } 3638105197Ssam } 3639105197Ssam break; 3640105197Ssam#endif 3641105197Ssam#ifdef INET6 3642105197Ssam case AF_INET6: 3643105197Ssam return key_ismyaddr6((struct sockaddr_in6 *)sa); 3644105197Ssam#endif 3645105197Ssam } 3646105197Ssam 3647105197Ssam return 0; 3648105197Ssam} 3649105197Ssam 3650105197Ssam#ifdef INET6 3651105197Ssam/* 3652105197Ssam * compare my own address for IPv6. 3653105197Ssam * 1: ours 3654105197Ssam * 0: other 3655105197Ssam * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3656105197Ssam */ 3657105197Ssam#include <netinet6/in6_var.h> 3658105197Ssam 3659105197Ssamstatic int 3660105197Ssamkey_ismyaddr6(sin6) 3661105197Ssam struct sockaddr_in6 *sin6; 3662105197Ssam{ 3663105197Ssam struct in6_ifaddr *ia; 3664105197Ssam struct in6_multi *in6m; 3665105197Ssam 3666105197Ssam for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 3667105197Ssam if (key_sockaddrcmp((struct sockaddr *)&sin6, 3668105197Ssam (struct sockaddr *)&ia->ia_addr, 0) == 0) 3669105197Ssam return 1; 3670105197Ssam 3671105197Ssam /* 3672105197Ssam * XXX Multicast 3673105197Ssam * XXX why do we care about multlicast here while we don't care 3674105197Ssam * about IPv4 multicast?? 3675105197Ssam * XXX scope 3676105197Ssam */ 3677105197Ssam in6m = NULL; 3678105197Ssam IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3679105197Ssam if (in6m) 3680105197Ssam return 1; 3681105197Ssam } 3682105197Ssam 3683105197Ssam /* loopback, just for safety */ 3684105197Ssam if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3685105197Ssam return 1; 3686105197Ssam 3687105197Ssam return 0; 3688105197Ssam} 3689105197Ssam#endif /*INET6*/ 3690105197Ssam 3691105197Ssam/* 3692105197Ssam * compare two secasindex structure. 3693105197Ssam * flag can specify to compare 2 saidxes. 3694105197Ssam * compare two secasindex structure without both mode and reqid. 3695105197Ssam * don't compare port. 3696105197Ssam * IN: 3697105197Ssam * saidx0: source, it can be in SAD. 3698105197Ssam * saidx1: object. 3699105197Ssam * OUT: 3700105197Ssam * 1 : equal 3701105197Ssam * 0 : not equal 3702105197Ssam */ 3703105197Ssamstatic int 3704105197Ssamkey_cmpsaidx( 3705105197Ssam const struct secasindex *saidx0, 3706105197Ssam const struct secasindex *saidx1, 3707105197Ssam int flag) 3708105197Ssam{ 3709105197Ssam /* sanity */ 3710105197Ssam if (saidx0 == NULL && saidx1 == NULL) 3711105197Ssam return 1; 3712105197Ssam 3713105197Ssam if (saidx0 == NULL || saidx1 == NULL) 3714105197Ssam return 0; 3715105197Ssam 3716105197Ssam if (saidx0->proto != saidx1->proto) 3717105197Ssam return 0; 3718105197Ssam 3719105197Ssam if (flag == CMP_EXACTLY) { 3720105197Ssam if (saidx0->mode != saidx1->mode) 3721105197Ssam return 0; 3722105197Ssam if (saidx0->reqid != saidx1->reqid) 3723105197Ssam return 0; 3724105197Ssam if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 3725105197Ssam bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 3726105197Ssam return 0; 3727105197Ssam } else { 3728105197Ssam 3729105197Ssam /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 3730105197Ssam if (flag == CMP_MODE_REQID 3731105197Ssam ||flag == CMP_REQID) { 3732105197Ssam /* 3733105197Ssam * If reqid of SPD is non-zero, unique SA is required. 3734105197Ssam * The result must be of same reqid in this case. 3735105197Ssam */ 3736105197Ssam if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 3737105197Ssam return 0; 3738105197Ssam } 3739105197Ssam 3740105197Ssam if (flag == CMP_MODE_REQID) { 3741105197Ssam if (saidx0->mode != IPSEC_MODE_ANY 3742105197Ssam && saidx0->mode != saidx1->mode) 3743105197Ssam return 0; 3744105197Ssam } 3745105197Ssam 3746105197Ssam if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) { 3747105197Ssam return 0; 3748105197Ssam } 3749105197Ssam if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) { 3750105197Ssam return 0; 3751105197Ssam } 3752105197Ssam } 3753105197Ssam 3754105197Ssam return 1; 3755105197Ssam} 3756105197Ssam 3757105197Ssam/* 3758105197Ssam * compare two secindex structure exactly. 3759105197Ssam * IN: 3760105197Ssam * spidx0: source, it is often in SPD. 3761105197Ssam * spidx1: object, it is often from PFKEY message. 3762105197Ssam * OUT: 3763105197Ssam * 1 : equal 3764105197Ssam * 0 : not equal 3765105197Ssam */ 3766105197Ssamstatic int 3767105197Ssamkey_cmpspidx_exactly( 3768105197Ssam struct secpolicyindex *spidx0, 3769105197Ssam struct secpolicyindex *spidx1) 3770105197Ssam{ 3771105197Ssam /* sanity */ 3772105197Ssam if (spidx0 == NULL && spidx1 == NULL) 3773105197Ssam return 1; 3774105197Ssam 3775105197Ssam if (spidx0 == NULL || spidx1 == NULL) 3776105197Ssam return 0; 3777105197Ssam 3778105197Ssam if (spidx0->prefs != spidx1->prefs 3779105197Ssam || spidx0->prefd != spidx1->prefd 3780105197Ssam || spidx0->ul_proto != spidx1->ul_proto) 3781105197Ssam return 0; 3782105197Ssam 3783105197Ssam return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 3784105197Ssam key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 3785105197Ssam} 3786105197Ssam 3787105197Ssam/* 3788105197Ssam * compare two secindex structure with mask. 3789105197Ssam * IN: 3790105197Ssam * spidx0: source, it is often in SPD. 3791105197Ssam * spidx1: object, it is often from IP header. 3792105197Ssam * OUT: 3793105197Ssam * 1 : equal 3794105197Ssam * 0 : not equal 3795105197Ssam */ 3796105197Ssamstatic int 3797105197Ssamkey_cmpspidx_withmask( 3798105197Ssam struct secpolicyindex *spidx0, 3799105197Ssam struct secpolicyindex *spidx1) 3800105197Ssam{ 3801105197Ssam /* sanity */ 3802105197Ssam if (spidx0 == NULL && spidx1 == NULL) 3803105197Ssam return 1; 3804105197Ssam 3805105197Ssam if (spidx0 == NULL || spidx1 == NULL) 3806105197Ssam return 0; 3807105197Ssam 3808105197Ssam if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 3809105197Ssam spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 3810105197Ssam spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 3811105197Ssam spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 3812105197Ssam return 0; 3813105197Ssam 3814105197Ssam /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 3815105197Ssam if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 3816105197Ssam && spidx0->ul_proto != spidx1->ul_proto) 3817105197Ssam return 0; 3818105197Ssam 3819105197Ssam switch (spidx0->src.sa.sa_family) { 3820105197Ssam case AF_INET: 3821105197Ssam if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 3822105197Ssam && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 3823105197Ssam return 0; 3824105197Ssam if (!key_bbcmp(&spidx0->src.sin.sin_addr, 3825105197Ssam &spidx1->src.sin.sin_addr, spidx0->prefs)) 3826105197Ssam return 0; 3827105197Ssam break; 3828105197Ssam case AF_INET6: 3829105197Ssam if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 3830105197Ssam && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 3831105197Ssam return 0; 3832105197Ssam /* 3833105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 3834105197Ssam * as a wildcard scope, which matches any scope zone ID. 3835105197Ssam */ 3836105197Ssam if (spidx0->src.sin6.sin6_scope_id && 3837105197Ssam spidx1->src.sin6.sin6_scope_id && 3838105197Ssam spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 3839105197Ssam return 0; 3840105197Ssam if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 3841105197Ssam &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 3842105197Ssam return 0; 3843105197Ssam break; 3844105197Ssam default: 3845105197Ssam /* XXX */ 3846105197Ssam if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 3847105197Ssam return 0; 3848105197Ssam break; 3849105197Ssam } 3850105197Ssam 3851105197Ssam switch (spidx0->dst.sa.sa_family) { 3852105197Ssam case AF_INET: 3853105197Ssam if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 3854105197Ssam && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 3855105197Ssam return 0; 3856105197Ssam if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 3857105197Ssam &spidx1->dst.sin.sin_addr, spidx0->prefd)) 3858105197Ssam return 0; 3859105197Ssam break; 3860105197Ssam case AF_INET6: 3861105197Ssam if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 3862105197Ssam && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 3863105197Ssam return 0; 3864105197Ssam /* 3865105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 3866105197Ssam * as a wildcard scope, which matches any scope zone ID. 3867105197Ssam */ 3868105197Ssam if (spidx0->src.sin6.sin6_scope_id && 3869105197Ssam spidx1->src.sin6.sin6_scope_id && 3870105197Ssam spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 3871105197Ssam return 0; 3872105197Ssam if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 3873105197Ssam &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 3874105197Ssam return 0; 3875105197Ssam break; 3876105197Ssam default: 3877105197Ssam /* XXX */ 3878105197Ssam if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 3879105197Ssam return 0; 3880105197Ssam break; 3881105197Ssam } 3882105197Ssam 3883105197Ssam /* XXX Do we check other field ? e.g. flowinfo */ 3884105197Ssam 3885105197Ssam return 1; 3886105197Ssam} 3887105197Ssam 3888105197Ssam/* returns 0 on match */ 3889105197Ssamstatic int 3890105197Ssamkey_sockaddrcmp( 3891105197Ssam const struct sockaddr *sa1, 3892105197Ssam const struct sockaddr *sa2, 3893105197Ssam int port) 3894105197Ssam{ 3895105197Ssam#ifdef satosin 3896105197Ssam#undef satosin 3897105197Ssam#endif 3898105197Ssam#define satosin(s) ((const struct sockaddr_in *)s) 3899105197Ssam#ifdef satosin6 3900105197Ssam#undef satosin6 3901105197Ssam#endif 3902105197Ssam#define satosin6(s) ((const struct sockaddr_in6 *)s) 3903105197Ssam if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 3904105197Ssam return 1; 3905105197Ssam 3906105197Ssam switch (sa1->sa_family) { 3907105197Ssam case AF_INET: 3908105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in)) 3909105197Ssam return 1; 3910105197Ssam if (satosin(sa1)->sin_addr.s_addr != 3911105197Ssam satosin(sa2)->sin_addr.s_addr) { 3912105197Ssam return 1; 3913105197Ssam } 3914105197Ssam if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 3915105197Ssam return 1; 3916105197Ssam break; 3917105197Ssam case AF_INET6: 3918105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in6)) 3919105197Ssam return 1; /*EINVAL*/ 3920105197Ssam if (satosin6(sa1)->sin6_scope_id != 3921105197Ssam satosin6(sa2)->sin6_scope_id) { 3922105197Ssam return 1; 3923105197Ssam } 3924105197Ssam if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 3925105197Ssam &satosin6(sa2)->sin6_addr)) { 3926105197Ssam return 1; 3927105197Ssam } 3928105197Ssam if (port && 3929105197Ssam satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 3930105197Ssam return 1; 3931105197Ssam } 3932105197Ssam default: 3933105197Ssam if (bcmp(sa1, sa2, sa1->sa_len) != 0) 3934105197Ssam return 1; 3935105197Ssam break; 3936105197Ssam } 3937105197Ssam 3938105197Ssam return 0; 3939105197Ssam#undef satosin 3940105197Ssam#undef satosin6 3941105197Ssam} 3942105197Ssam 3943105197Ssam/* 3944105197Ssam * compare two buffers with mask. 3945105197Ssam * IN: 3946105197Ssam * addr1: source 3947105197Ssam * addr2: object 3948105197Ssam * bits: Number of bits to compare 3949105197Ssam * OUT: 3950105197Ssam * 1 : equal 3951105197Ssam * 0 : not equal 3952105197Ssam */ 3953105197Ssamstatic int 3954105197Ssamkey_bbcmp(const void *a1, const void *a2, u_int bits) 3955105197Ssam{ 3956105197Ssam const unsigned char *p1 = a1; 3957105197Ssam const unsigned char *p2 = a2; 3958105197Ssam 3959105197Ssam /* XXX: This could be considerably faster if we compare a word 3960105197Ssam * at a time, but it is complicated on LSB Endian machines */ 3961105197Ssam 3962105197Ssam /* Handle null pointers */ 3963105197Ssam if (p1 == NULL || p2 == NULL) 3964105197Ssam return (p1 == p2); 3965105197Ssam 3966105197Ssam while (bits >= 8) { 3967105197Ssam if (*p1++ != *p2++) 3968105197Ssam return 0; 3969105197Ssam bits -= 8; 3970105197Ssam } 3971105197Ssam 3972105197Ssam if (bits > 0) { 3973105197Ssam u_int8_t mask = ~((1<<(8-bits))-1); 3974105197Ssam if ((*p1 & mask) != (*p2 & mask)) 3975105197Ssam return 0; 3976105197Ssam } 3977105197Ssam return 1; /* Match! */ 3978105197Ssam} 3979105197Ssam 3980119643Ssamstatic void 3981119643Ssamkey_flush_spd(time_t now) 3982105197Ssam{ 3983120585Ssam static u_int16_t sptree_scangen = 0; 3984120585Ssam u_int16_t gen = sptree_scangen++; 3985120585Ssam struct secpolicy *sp; 3986105197Ssam u_int dir; 3987105197Ssam 3988105197Ssam /* SPD */ 3989105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 3990120585Ssamrestart: 3991120585Ssam SPTREE_LOCK(); 3992120585Ssam LIST_FOREACH(sp, &sptree[dir], chain) { 3993120585Ssam if (sp->scangen == gen) /* previously handled */ 3994120585Ssam continue; 3995120585Ssam sp->scangen = gen; 3996105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) { 3997120585Ssam /* NB: clean entries created by key_spdflush */ 3998120585Ssam SPTREE_UNLOCK(); 3999105197Ssam KEY_FREESP(&sp); 4000120585Ssam goto restart; 4001105197Ssam } 4002105197Ssam if (sp->lifetime == 0 && sp->validtime == 0) 4003105197Ssam continue; 4004105197Ssam if ((sp->lifetime && now - sp->created > sp->lifetime) 4005105197Ssam || (sp->validtime && now - sp->lastused > sp->validtime)) { 4006105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 4007120585Ssam SPTREE_UNLOCK(); 4008105197Ssam key_spdexpire(sp); 4009120585Ssam KEY_FREESP(&sp); 4010120585Ssam goto restart; 4011105197Ssam } 4012105197Ssam } 4013120585Ssam SPTREE_UNLOCK(); 4014105197Ssam } 4015119643Ssam} 4016105197Ssam 4017119643Ssamstatic void 4018119643Ssamkey_flush_sad(time_t now) 4019119643Ssam{ 4020105197Ssam struct secashead *sah, *nextsah; 4021105197Ssam struct secasvar *sav, *nextsav; 4022105197Ssam 4023119643Ssam /* SAD */ 4024120585Ssam SAHTREE_LOCK(); 4025120585Ssam LIST_FOREACH_SAFE(sah, &sahtree, chain, nextsah) { 4026105197Ssam /* if sah has been dead, then delete it and process next sah. */ 4027105197Ssam if (sah->state == SADB_SASTATE_DEAD) { 4028105197Ssam key_delsah(sah); 4029105197Ssam continue; 4030105197Ssam } 4031105197Ssam 4032105197Ssam /* if LARVAL entry doesn't become MATURE, delete it. */ 4033120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4034120585Ssam if (now - sav->created > key_larval_lifetime) 4035105197Ssam KEY_FREESAV(&sav); 4036105197Ssam } 4037105197Ssam 4038105197Ssam /* 4039105197Ssam * check MATURE entry to start to send expire message 4040105197Ssam * whether or not. 4041105197Ssam */ 4042120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4043105197Ssam /* we don't need to check. */ 4044105197Ssam if (sav->lft_s == NULL) 4045105197Ssam continue; 4046105197Ssam 4047105197Ssam /* sanity check */ 4048105197Ssam if (sav->lft_c == NULL) { 4049120585Ssam ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4050120585Ssam "time, why?\n", __func__)); 4051105197Ssam continue; 4052105197Ssam } 4053105197Ssam 4054105197Ssam /* check SOFT lifetime */ 4055120585Ssam if (sav->lft_s->sadb_lifetime_addtime != 0 && 4056120585Ssam now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4057105197Ssam /* 4058105197Ssam * check SA to be used whether or not. 4059105197Ssam * when SA hasn't been used, delete it. 4060105197Ssam */ 4061105197Ssam if (sav->lft_c->sadb_lifetime_usetime == 0) { 4062105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4063105197Ssam KEY_FREESAV(&sav); 4064105197Ssam } else { 4065105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DYING); 4066105197Ssam /* 4067105197Ssam * XXX If we keep to send expire 4068105197Ssam * message in the status of 4069105197Ssam * DYING. Do remove below code. 4070105197Ssam */ 4071105197Ssam key_expire(sav); 4072105197Ssam } 4073105197Ssam } 4074105197Ssam /* check SOFT lifetime by bytes */ 4075105197Ssam /* 4076105197Ssam * XXX I don't know the way to delete this SA 4077105197Ssam * when new SA is installed. Caution when it's 4078105197Ssam * installed too big lifetime by time. 4079105197Ssam */ 4080120585Ssam else if (sav->lft_s->sadb_lifetime_bytes != 0 && 4081120585Ssam sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4082105197Ssam 4083105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DYING); 4084105197Ssam /* 4085105197Ssam * XXX If we keep to send expire 4086105197Ssam * message in the status of 4087105197Ssam * DYING. Do remove below code. 4088105197Ssam */ 4089105197Ssam key_expire(sav); 4090105197Ssam } 4091105197Ssam } 4092105197Ssam 4093105197Ssam /* check DYING entry to change status to DEAD. */ 4094120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4095105197Ssam /* we don't need to check. */ 4096105197Ssam if (sav->lft_h == NULL) 4097105197Ssam continue; 4098105197Ssam 4099105197Ssam /* sanity check */ 4100105197Ssam if (sav->lft_c == NULL) { 4101120585Ssam ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4102120585Ssam "time, why?\n", __func__)); 4103105197Ssam continue; 4104105197Ssam } 4105105197Ssam 4106120585Ssam if (sav->lft_h->sadb_lifetime_addtime != 0 && 4107120585Ssam now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4108105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4109105197Ssam KEY_FREESAV(&sav); 4110105197Ssam } 4111105197Ssam#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4112105197Ssam else if (sav->lft_s != NULL 4113105197Ssam && sav->lft_s->sadb_lifetime_addtime != 0 4114105197Ssam && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4115105197Ssam /* 4116105197Ssam * XXX: should be checked to be 4117105197Ssam * installed the valid SA. 4118105197Ssam */ 4119105197Ssam 4120105197Ssam /* 4121105197Ssam * If there is no SA then sending 4122105197Ssam * expire message. 4123105197Ssam */ 4124105197Ssam key_expire(sav); 4125105197Ssam } 4126105197Ssam#endif 4127105197Ssam /* check HARD lifetime by bytes */ 4128120585Ssam else if (sav->lft_h->sadb_lifetime_bytes != 0 && 4129120585Ssam sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) { 4130105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4131105197Ssam KEY_FREESAV(&sav); 4132105197Ssam } 4133105197Ssam } 4134105197Ssam 4135105197Ssam /* delete entry in DEAD */ 4136120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4137105197Ssam /* sanity check */ 4138105197Ssam if (sav->state != SADB_SASTATE_DEAD) { 4139120585Ssam ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4140120585Ssam "(queue: %d SA: %d): kill it anyway\n", 4141120585Ssam __func__, 4142105197Ssam SADB_SASTATE_DEAD, sav->state)); 4143105197Ssam } 4144105197Ssam /* 4145105197Ssam * do not call key_freesav() here. 4146105197Ssam * sav should already be freed, and sav->refcnt 4147105197Ssam * shows other references to sav 4148105197Ssam * (such as from SPD). 4149105197Ssam */ 4150105197Ssam } 4151105197Ssam } 4152120585Ssam SAHTREE_UNLOCK(); 4153119643Ssam} 4154105197Ssam 4155119643Ssamstatic void 4156119643Ssamkey_flush_acq(time_t now) 4157119643Ssam{ 4158105197Ssam struct secacq *acq, *nextacq; 4159105197Ssam 4160119643Ssam /* ACQ tree */ 4161120585Ssam ACQ_LOCK(); 4162119643Ssam for (acq = LIST_FIRST(&acqtree); acq != NULL; acq = nextacq) { 4163105197Ssam nextacq = LIST_NEXT(acq, chain); 4164105197Ssam if (now - acq->created > key_blockacq_lifetime 4165105197Ssam && __LIST_CHAINED(acq)) { 4166105197Ssam LIST_REMOVE(acq, chain); 4167119643Ssam free(acq, M_IPSEC_SAQ); 4168105197Ssam } 4169105197Ssam } 4170120585Ssam ACQ_UNLOCK(); 4171119643Ssam} 4172105197Ssam 4173119643Ssamstatic void 4174119643Ssamkey_flush_spacq(time_t now) 4175119643Ssam{ 4176105197Ssam struct secspacq *acq, *nextacq; 4177105197Ssam 4178119643Ssam /* SP ACQ tree */ 4179120585Ssam SPACQ_LOCK(); 4180119643Ssam for (acq = LIST_FIRST(&spacqtree); acq != NULL; acq = nextacq) { 4181105197Ssam nextacq = LIST_NEXT(acq, chain); 4182105197Ssam if (now - acq->created > key_blockacq_lifetime 4183105197Ssam && __LIST_CHAINED(acq)) { 4184105197Ssam LIST_REMOVE(acq, chain); 4185119643Ssam free(acq, M_IPSEC_SAQ); 4186105197Ssam } 4187105197Ssam } 4188120585Ssam SPACQ_UNLOCK(); 4189119643Ssam} 4190105197Ssam 4191119643Ssam/* 4192119643Ssam * time handler. 4193119643Ssam * scanning SPD and SAD to check status for each entries, 4194119643Ssam * and do to remove or to expire. 4195119643Ssam * XXX: year 2038 problem may remain. 4196119643Ssam */ 4197119643Ssamvoid 4198119643Ssamkey_timehandler(void) 4199119643Ssam{ 4200119643Ssam time_t now = time_second; 4201105197Ssam 4202119643Ssam key_flush_spd(now); 4203119643Ssam key_flush_sad(now); 4204119643Ssam key_flush_acq(now); 4205119643Ssam key_flush_spacq(now); 4206119643Ssam 4207105197Ssam#ifndef IPSEC_DEBUG2 4208105197Ssam /* do exchange to tick time !! */ 4209105197Ssam (void)timeout((void *)key_timehandler, (void *)0, hz); 4210105197Ssam#endif /* IPSEC_DEBUG2 */ 4211105197Ssam} 4212105197Ssam 4213105197Ssamu_long 4214105197Ssamkey_random() 4215105197Ssam{ 4216105197Ssam u_long value; 4217105197Ssam 4218105197Ssam key_randomfill(&value, sizeof(value)); 4219105197Ssam return value; 4220105197Ssam} 4221105197Ssam 4222105197Ssamvoid 4223105197Ssamkey_randomfill(p, l) 4224105197Ssam void *p; 4225105197Ssam size_t l; 4226105197Ssam{ 4227105197Ssam size_t n; 4228105197Ssam u_long v; 4229105197Ssam static int warn = 1; 4230105197Ssam 4231105197Ssam n = 0; 4232105197Ssam n = (size_t)read_random(p, (u_int)l); 4233105197Ssam /* last resort */ 4234105197Ssam while (n < l) { 4235105197Ssam v = random(); 4236105197Ssam bcopy(&v, (u_int8_t *)p + n, 4237105197Ssam l - n < sizeof(v) ? l - n : sizeof(v)); 4238105197Ssam n += sizeof(v); 4239105197Ssam 4240105197Ssam if (warn) { 4241105197Ssam printf("WARNING: pseudo-random number generator " 4242105197Ssam "used for IPsec processing\n"); 4243105197Ssam warn = 0; 4244105197Ssam } 4245105197Ssam } 4246105197Ssam} 4247105197Ssam 4248105197Ssam/* 4249105197Ssam * map SADB_SATYPE_* to IPPROTO_*. 4250105197Ssam * if satype == SADB_SATYPE then satype is mapped to ~0. 4251105197Ssam * OUT: 4252105197Ssam * 0: invalid satype. 4253105197Ssam */ 4254105197Ssamstatic u_int16_t 4255105197Ssamkey_satype2proto(satype) 4256105197Ssam u_int8_t satype; 4257105197Ssam{ 4258105197Ssam switch (satype) { 4259105197Ssam case SADB_SATYPE_UNSPEC: 4260105197Ssam return IPSEC_PROTO_ANY; 4261105197Ssam case SADB_SATYPE_AH: 4262105197Ssam return IPPROTO_AH; 4263105197Ssam case SADB_SATYPE_ESP: 4264105197Ssam return IPPROTO_ESP; 4265105197Ssam case SADB_X_SATYPE_IPCOMP: 4266105197Ssam return IPPROTO_IPCOMP; 4267125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 4268125680Sbms return IPPROTO_TCP; 4269105197Ssam default: 4270105197Ssam return 0; 4271105197Ssam } 4272105197Ssam /* NOTREACHED */ 4273105197Ssam} 4274105197Ssam 4275105197Ssam/* 4276105197Ssam * map IPPROTO_* to SADB_SATYPE_* 4277105197Ssam * OUT: 4278105197Ssam * 0: invalid protocol type. 4279105197Ssam */ 4280105197Ssamstatic u_int8_t 4281105197Ssamkey_proto2satype(proto) 4282105197Ssam u_int16_t proto; 4283105197Ssam{ 4284105197Ssam switch (proto) { 4285105197Ssam case IPPROTO_AH: 4286105197Ssam return SADB_SATYPE_AH; 4287105197Ssam case IPPROTO_ESP: 4288105197Ssam return SADB_SATYPE_ESP; 4289105197Ssam case IPPROTO_IPCOMP: 4290105197Ssam return SADB_X_SATYPE_IPCOMP; 4291125680Sbms case IPPROTO_TCP: 4292125680Sbms return SADB_X_SATYPE_TCPSIGNATURE; 4293105197Ssam default: 4294105197Ssam return 0; 4295105197Ssam } 4296105197Ssam /* NOTREACHED */ 4297105197Ssam} 4298105197Ssam 4299105197Ssam/* %%% PF_KEY */ 4300105197Ssam/* 4301105197Ssam * SADB_GETSPI processing is to receive 4302105197Ssam * <base, (SA2), src address, dst address, (SPI range)> 4303105197Ssam * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4304105197Ssam * tree with the status of LARVAL, and send 4305105197Ssam * <base, SA(*), address(SD)> 4306105197Ssam * to the IKMPd. 4307105197Ssam * 4308105197Ssam * IN: mhp: pointer to the pointer to each header. 4309105197Ssam * OUT: NULL if fail. 4310105197Ssam * other if success, return pointer to the message to send. 4311105197Ssam */ 4312105197Ssamstatic int 4313105197Ssamkey_getspi(so, m, mhp) 4314105197Ssam struct socket *so; 4315105197Ssam struct mbuf *m; 4316105197Ssam const struct sadb_msghdr *mhp; 4317105197Ssam{ 4318105197Ssam struct sadb_address *src0, *dst0; 4319105197Ssam struct secasindex saidx; 4320105197Ssam struct secashead *newsah; 4321105197Ssam struct secasvar *newsav; 4322105197Ssam u_int8_t proto; 4323105197Ssam u_int32_t spi; 4324105197Ssam u_int8_t mode; 4325105197Ssam u_int32_t reqid; 4326105197Ssam int error; 4327105197Ssam 4328120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4329120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4330120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4331120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4332105197Ssam 4333105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4334105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4335120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4336120585Ssam __func__)); 4337105197Ssam return key_senderror(so, m, EINVAL); 4338105197Ssam } 4339105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4340105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4341120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4342120585Ssam __func__)); 4343105197Ssam return key_senderror(so, m, EINVAL); 4344105197Ssam } 4345105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4346105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4347105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4348105197Ssam } else { 4349105197Ssam mode = IPSEC_MODE_ANY; 4350105197Ssam reqid = 0; 4351105197Ssam } 4352105197Ssam 4353105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4354105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4355105197Ssam 4356105197Ssam /* map satype to proto */ 4357105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4358120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4359120585Ssam __func__)); 4360105197Ssam return key_senderror(so, m, EINVAL); 4361105197Ssam } 4362105197Ssam 4363105197Ssam /* make sure if port number is zero. */ 4364105197Ssam switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4365105197Ssam case AF_INET: 4366105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4367105197Ssam sizeof(struct sockaddr_in)) 4368105197Ssam return key_senderror(so, m, EINVAL); 4369105197Ssam ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4370105197Ssam break; 4371105197Ssam case AF_INET6: 4372105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4373105197Ssam sizeof(struct sockaddr_in6)) 4374105197Ssam return key_senderror(so, m, EINVAL); 4375105197Ssam ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4376105197Ssam break; 4377105197Ssam default: 4378105197Ssam ; /*???*/ 4379105197Ssam } 4380105197Ssam switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4381105197Ssam case AF_INET: 4382105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4383105197Ssam sizeof(struct sockaddr_in)) 4384105197Ssam return key_senderror(so, m, EINVAL); 4385105197Ssam ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4386105197Ssam break; 4387105197Ssam case AF_INET6: 4388105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4389105197Ssam sizeof(struct sockaddr_in6)) 4390105197Ssam return key_senderror(so, m, EINVAL); 4391105197Ssam ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4392105197Ssam break; 4393105197Ssam default: 4394105197Ssam ; /*???*/ 4395105197Ssam } 4396105197Ssam 4397105197Ssam /* XXX boundary check against sa_len */ 4398105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4399105197Ssam 4400105197Ssam /* SPI allocation */ 4401105197Ssam spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4402105197Ssam &saidx); 4403105197Ssam if (spi == 0) 4404105197Ssam return key_senderror(so, m, EINVAL); 4405105197Ssam 4406105197Ssam /* get a SA index */ 4407105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 4408105197Ssam /* create a new SA index */ 4409105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 4410120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4411105197Ssam return key_senderror(so, m, ENOBUFS); 4412105197Ssam } 4413105197Ssam } 4414105197Ssam 4415105197Ssam /* get a new SA */ 4416105197Ssam /* XXX rewrite */ 4417105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4418105197Ssam if (newsav == NULL) { 4419105197Ssam /* XXX don't free new SA index allocated in above. */ 4420105197Ssam return key_senderror(so, m, error); 4421105197Ssam } 4422105197Ssam 4423105197Ssam /* set spi */ 4424105197Ssam newsav->spi = htonl(spi); 4425105197Ssam 4426105197Ssam /* delete the entry in acqtree */ 4427105197Ssam if (mhp->msg->sadb_msg_seq != 0) { 4428105197Ssam struct secacq *acq; 4429105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4430105197Ssam /* reset counter in order to deletion by timehandler. */ 4431105197Ssam acq->created = time_second; 4432105197Ssam acq->count = 0; 4433105197Ssam } 4434105197Ssam } 4435105197Ssam 4436105197Ssam { 4437105197Ssam struct mbuf *n, *nn; 4438105197Ssam struct sadb_sa *m_sa; 4439105197Ssam struct sadb_msg *newmsg; 4440105197Ssam int off, len; 4441105197Ssam 4442105197Ssam /* create new sadb_msg to reply. */ 4443105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4444105197Ssam PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4445105197Ssam if (len > MCLBYTES) 4446105197Ssam return key_senderror(so, m, ENOBUFS); 4447105197Ssam 4448111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 4449105197Ssam if (len > MHLEN) { 4450111119Simp MCLGET(n, M_DONTWAIT); 4451105197Ssam if ((n->m_flags & M_EXT) == 0) { 4452105197Ssam m_freem(n); 4453105197Ssam n = NULL; 4454105197Ssam } 4455105197Ssam } 4456105197Ssam if (!n) 4457105197Ssam return key_senderror(so, m, ENOBUFS); 4458105197Ssam 4459105197Ssam n->m_len = len; 4460105197Ssam n->m_next = NULL; 4461105197Ssam off = 0; 4462105197Ssam 4463105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4464105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4465105197Ssam 4466105197Ssam m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4467105197Ssam m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4468105197Ssam m_sa->sadb_sa_exttype = SADB_EXT_SA; 4469105197Ssam m_sa->sadb_sa_spi = htonl(spi); 4470105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4471105197Ssam 4472120585Ssam IPSEC_ASSERT(off == len, 4473120585Ssam ("length inconsistency (off %u len %u)", off, len)); 4474105197Ssam 4475105197Ssam n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4476105197Ssam SADB_EXT_ADDRESS_DST); 4477105197Ssam if (!n->m_next) { 4478105197Ssam m_freem(n); 4479105197Ssam return key_senderror(so, m, ENOBUFS); 4480105197Ssam } 4481105197Ssam 4482105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 4483105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 4484105197Ssam if (n == NULL) 4485105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4486105197Ssam } 4487105197Ssam 4488105197Ssam n->m_pkthdr.len = 0; 4489105197Ssam for (nn = n; nn; nn = nn->m_next) 4490105197Ssam n->m_pkthdr.len += nn->m_len; 4491105197Ssam 4492105197Ssam newmsg = mtod(n, struct sadb_msg *); 4493105197Ssam newmsg->sadb_msg_seq = newsav->seq; 4494105197Ssam newmsg->sadb_msg_errno = 0; 4495105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4496105197Ssam 4497105197Ssam m_freem(m); 4498105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4499105197Ssam } 4500105197Ssam} 4501105197Ssam 4502105197Ssam/* 4503105197Ssam * allocating new SPI 4504105197Ssam * called by key_getspi(). 4505105197Ssam * OUT: 4506105197Ssam * 0: failure. 4507105197Ssam * others: success. 4508105197Ssam */ 4509105197Ssamstatic u_int32_t 4510105197Ssamkey_do_getnewspi(spirange, saidx) 4511105197Ssam struct sadb_spirange *spirange; 4512105197Ssam struct secasindex *saidx; 4513105197Ssam{ 4514105197Ssam u_int32_t newspi; 4515105197Ssam u_int32_t min, max; 4516105197Ssam int count = key_spi_trycnt; 4517105197Ssam 4518105197Ssam /* set spi range to allocate */ 4519105197Ssam if (spirange != NULL) { 4520105197Ssam min = spirange->sadb_spirange_min; 4521105197Ssam max = spirange->sadb_spirange_max; 4522105197Ssam } else { 4523105197Ssam min = key_spi_minval; 4524105197Ssam max = key_spi_maxval; 4525105197Ssam } 4526105197Ssam /* IPCOMP needs 2-byte SPI */ 4527105197Ssam if (saidx->proto == IPPROTO_IPCOMP) { 4528105197Ssam u_int32_t t; 4529105197Ssam if (min >= 0x10000) 4530105197Ssam min = 0xffff; 4531105197Ssam if (max >= 0x10000) 4532105197Ssam max = 0xffff; 4533105197Ssam if (min > max) { 4534105197Ssam t = min; min = max; max = t; 4535105197Ssam } 4536105197Ssam } 4537105197Ssam 4538105197Ssam if (min == max) { 4539105197Ssam if (key_checkspidup(saidx, min) != NULL) { 4540120585Ssam ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4541120585Ssam __func__, min)); 4542105197Ssam return 0; 4543105197Ssam } 4544105197Ssam 4545105197Ssam count--; /* taking one cost. */ 4546105197Ssam newspi = min; 4547105197Ssam 4548105197Ssam } else { 4549105197Ssam 4550105197Ssam /* init SPI */ 4551105197Ssam newspi = 0; 4552105197Ssam 4553105197Ssam /* when requesting to allocate spi ranged */ 4554105197Ssam while (count--) { 4555105197Ssam /* generate pseudo-random SPI value ranged. */ 4556105197Ssam newspi = min + (key_random() % (max - min + 1)); 4557105197Ssam 4558105197Ssam if (key_checkspidup(saidx, newspi) == NULL) 4559105197Ssam break; 4560105197Ssam } 4561105197Ssam 4562105197Ssam if (count == 0 || newspi == 0) { 4563120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4564120585Ssam __func__)); 4565105197Ssam return 0; 4566105197Ssam } 4567105197Ssam } 4568105197Ssam 4569105197Ssam /* statistics */ 4570105197Ssam keystat.getspi_count = 4571105197Ssam (keystat.getspi_count + key_spi_trycnt - count) / 2; 4572105197Ssam 4573105197Ssam return newspi; 4574105197Ssam} 4575105197Ssam 4576105197Ssam/* 4577105197Ssam * SADB_UPDATE processing 4578105197Ssam * receive 4579105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4580105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4581105197Ssam * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4582105197Ssam * and send 4583105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4584105197Ssam * (identity(SD),) (sensitivity)> 4585105197Ssam * to the ikmpd. 4586105197Ssam * 4587105197Ssam * m will always be freed. 4588105197Ssam */ 4589105197Ssamstatic int 4590105197Ssamkey_update(so, m, mhp) 4591105197Ssam struct socket *so; 4592105197Ssam struct mbuf *m; 4593105197Ssam const struct sadb_msghdr *mhp; 4594105197Ssam{ 4595105197Ssam struct sadb_sa *sa0; 4596105197Ssam struct sadb_address *src0, *dst0; 4597105197Ssam struct secasindex saidx; 4598105197Ssam struct secashead *sah; 4599105197Ssam struct secasvar *sav; 4600105197Ssam u_int16_t proto; 4601105197Ssam u_int8_t mode; 4602105197Ssam u_int32_t reqid; 4603105197Ssam int error; 4604105197Ssam 4605120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4606120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4607120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4608120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4609105197Ssam 4610105197Ssam /* map satype to proto */ 4611105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4612120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4613120585Ssam __func__)); 4614105197Ssam return key_senderror(so, m, EINVAL); 4615105197Ssam } 4616105197Ssam 4617105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 4618105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4619105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4620105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4621105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4622105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4623105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4624105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4625105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4626105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4627105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4628120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4629120585Ssam __func__)); 4630105197Ssam return key_senderror(so, m, EINVAL); 4631105197Ssam } 4632105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4633105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4634105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4635120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4636120585Ssam __func__)); 4637105197Ssam return key_senderror(so, m, EINVAL); 4638105197Ssam } 4639105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4640105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4641105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4642105197Ssam } else { 4643105197Ssam mode = IPSEC_MODE_ANY; 4644105197Ssam reqid = 0; 4645105197Ssam } 4646105197Ssam /* XXX boundary checking for other extensions */ 4647105197Ssam 4648105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4649105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4650105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4651105197Ssam 4652105197Ssam /* XXX boundary check against sa_len */ 4653105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4654105197Ssam 4655105197Ssam /* get a SA header */ 4656105197Ssam if ((sah = key_getsah(&saidx)) == NULL) { 4657120585Ssam ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 4658105197Ssam return key_senderror(so, m, ENOENT); 4659105197Ssam } 4660105197Ssam 4661105197Ssam /* set spidx if there */ 4662105197Ssam /* XXX rewrite */ 4663105197Ssam error = key_setident(sah, m, mhp); 4664105197Ssam if (error) 4665105197Ssam return key_senderror(so, m, error); 4666105197Ssam 4667105197Ssam /* find a SA with sequence number. */ 4668105197Ssam#ifdef IPSEC_DOSEQCHECK 4669105197Ssam if (mhp->msg->sadb_msg_seq != 0 4670105197Ssam && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 4671120585Ssam ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 4672120585Ssam "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 4673105197Ssam return key_senderror(so, m, ENOENT); 4674105197Ssam } 4675105197Ssam#else 4676120585Ssam SAHTREE_LOCK(); 4677120585Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 4678120585Ssam SAHTREE_UNLOCK(); 4679120585Ssam if (sav == NULL) { 4680120585Ssam ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 4681120585Ssam __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4682105197Ssam return key_senderror(so, m, EINVAL); 4683105197Ssam } 4684105197Ssam#endif 4685105197Ssam 4686105197Ssam /* validity check */ 4687105197Ssam if (sav->sah->saidx.proto != proto) { 4688120585Ssam ipseclog((LOG_DEBUG, "%s: protocol mismatched " 4689120585Ssam "(DB=%u param=%u)\n", __func__, 4690120585Ssam sav->sah->saidx.proto, proto)); 4691105197Ssam return key_senderror(so, m, EINVAL); 4692105197Ssam } 4693105197Ssam#ifdef IPSEC_DOSEQCHECK 4694105197Ssam if (sav->spi != sa0->sadb_sa_spi) { 4695120585Ssam ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 4696120585Ssam __func__, 4697105197Ssam (u_int32_t)ntohl(sav->spi), 4698105197Ssam (u_int32_t)ntohl(sa0->sadb_sa_spi))); 4699105197Ssam return key_senderror(so, m, EINVAL); 4700105197Ssam } 4701105197Ssam#endif 4702105197Ssam if (sav->pid != mhp->msg->sadb_msg_pid) { 4703120585Ssam ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 4704120585Ssam __func__, sav->pid, mhp->msg->sadb_msg_pid)); 4705105197Ssam return key_senderror(so, m, EINVAL); 4706105197Ssam } 4707105197Ssam 4708105197Ssam /* copy sav values */ 4709105197Ssam error = key_setsaval(sav, m, mhp); 4710105197Ssam if (error) { 4711105197Ssam KEY_FREESAV(&sav); 4712105197Ssam return key_senderror(so, m, error); 4713105197Ssam } 4714105197Ssam 4715105197Ssam /* check SA values to be mature. */ 4716105197Ssam if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 4717105197Ssam KEY_FREESAV(&sav); 4718105197Ssam return key_senderror(so, m, 0); 4719105197Ssam } 4720105197Ssam 4721105197Ssam { 4722105197Ssam struct mbuf *n; 4723105197Ssam 4724105197Ssam /* set msg buf from mhp */ 4725105197Ssam n = key_getmsgbuf_x1(m, mhp); 4726105197Ssam if (n == NULL) { 4727120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 4728105197Ssam return key_senderror(so, m, ENOBUFS); 4729105197Ssam } 4730105197Ssam 4731105197Ssam m_freem(m); 4732105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 4733105197Ssam } 4734105197Ssam} 4735105197Ssam 4736105197Ssam/* 4737105197Ssam * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 4738105197Ssam * only called by key_update(). 4739105197Ssam * OUT: 4740105197Ssam * NULL : not found 4741105197Ssam * others : found, pointer to a SA. 4742105197Ssam */ 4743105197Ssam#ifdef IPSEC_DOSEQCHECK 4744105197Ssamstatic struct secasvar * 4745105197Ssamkey_getsavbyseq(sah, seq) 4746105197Ssam struct secashead *sah; 4747105197Ssam u_int32_t seq; 4748105197Ssam{ 4749105197Ssam struct secasvar *sav; 4750105197Ssam u_int state; 4751105197Ssam 4752105197Ssam state = SADB_SASTATE_LARVAL; 4753105197Ssam 4754105197Ssam /* search SAD with sequence number ? */ 4755105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 4756105197Ssam 4757120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 4758105197Ssam 4759105197Ssam if (sav->seq == seq) { 4760105197Ssam SA_ADDREF(sav); 4761105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 4762120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 4763120585Ssam __func__, sav->refcnt, sav)); 4764105197Ssam return sav; 4765105197Ssam } 4766105197Ssam } 4767105197Ssam 4768105197Ssam return NULL; 4769105197Ssam} 4770105197Ssam#endif 4771105197Ssam 4772105197Ssam/* 4773105197Ssam * SADB_ADD processing 4774108533Sschweikh * add an entry to SA database, when received 4775105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4776105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4777105197Ssam * from the ikmpd, 4778105197Ssam * and send 4779105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4780105197Ssam * (identity(SD),) (sensitivity)> 4781105197Ssam * to the ikmpd. 4782105197Ssam * 4783105197Ssam * IGNORE identity and sensitivity messages. 4784105197Ssam * 4785105197Ssam * m will always be freed. 4786105197Ssam */ 4787105197Ssamstatic int 4788105197Ssamkey_add(so, m, mhp) 4789105197Ssam struct socket *so; 4790105197Ssam struct mbuf *m; 4791105197Ssam const struct sadb_msghdr *mhp; 4792105197Ssam{ 4793105197Ssam struct sadb_sa *sa0; 4794105197Ssam struct sadb_address *src0, *dst0; 4795105197Ssam struct secasindex saidx; 4796105197Ssam struct secashead *newsah; 4797105197Ssam struct secasvar *newsav; 4798105197Ssam u_int16_t proto; 4799105197Ssam u_int8_t mode; 4800105197Ssam u_int32_t reqid; 4801105197Ssam int error; 4802105197Ssam 4803120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4804120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4805120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4806120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4807105197Ssam 4808105197Ssam /* map satype to proto */ 4809105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4810120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4811120585Ssam __func__)); 4812105197Ssam return key_senderror(so, m, EINVAL); 4813105197Ssam } 4814105197Ssam 4815105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 4816105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4817105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 4818105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 4819105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 4820105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 4821105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 4822105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 4823105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 4824105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 4825105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 4826120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4827120585Ssam __func__)); 4828105197Ssam return key_senderror(so, m, EINVAL); 4829105197Ssam } 4830105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 4831105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4832105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4833105197Ssam /* XXX need more */ 4834120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4835120585Ssam __func__)); 4836105197Ssam return key_senderror(so, m, EINVAL); 4837105197Ssam } 4838105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4839105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4840105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4841105197Ssam } else { 4842105197Ssam mode = IPSEC_MODE_ANY; 4843105197Ssam reqid = 0; 4844105197Ssam } 4845105197Ssam 4846105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 4847105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4848105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4849105197Ssam 4850105197Ssam /* XXX boundary check against sa_len */ 4851105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4852105197Ssam 4853105197Ssam /* get a SA header */ 4854105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 4855105197Ssam /* create a new SA header */ 4856105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 4857120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4858105197Ssam return key_senderror(so, m, ENOBUFS); 4859105197Ssam } 4860105197Ssam } 4861105197Ssam 4862105197Ssam /* set spidx if there */ 4863105197Ssam /* XXX rewrite */ 4864105197Ssam error = key_setident(newsah, m, mhp); 4865105197Ssam if (error) { 4866105197Ssam return key_senderror(so, m, error); 4867105197Ssam } 4868105197Ssam 4869105197Ssam /* create new SA entry. */ 4870105197Ssam /* We can create new SA only if SPI is differenct. */ 4871120585Ssam SAHTREE_LOCK(); 4872120585Ssam newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 4873120585Ssam SAHTREE_UNLOCK(); 4874120585Ssam if (newsav != NULL) { 4875120585Ssam ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 4876105197Ssam return key_senderror(so, m, EEXIST); 4877105197Ssam } 4878105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4879105197Ssam if (newsav == NULL) { 4880105197Ssam return key_senderror(so, m, error); 4881105197Ssam } 4882105197Ssam 4883105197Ssam /* check SA values to be mature. */ 4884105197Ssam if ((error = key_mature(newsav)) != 0) { 4885105197Ssam KEY_FREESAV(&newsav); 4886105197Ssam return key_senderror(so, m, error); 4887105197Ssam } 4888105197Ssam 4889105197Ssam /* 4890105197Ssam * don't call key_freesav() here, as we would like to keep the SA 4891105197Ssam * in the database on success. 4892105197Ssam */ 4893105197Ssam 4894105197Ssam { 4895105197Ssam struct mbuf *n; 4896105197Ssam 4897105197Ssam /* set msg buf from mhp */ 4898105197Ssam n = key_getmsgbuf_x1(m, mhp); 4899105197Ssam if (n == NULL) { 4900120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 4901105197Ssam return key_senderror(so, m, ENOBUFS); 4902105197Ssam } 4903105197Ssam 4904105197Ssam m_freem(m); 4905105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 4906105197Ssam } 4907105197Ssam} 4908105197Ssam 4909105197Ssam/* m is retained */ 4910105197Ssamstatic int 4911105197Ssamkey_setident(sah, m, mhp) 4912105197Ssam struct secashead *sah; 4913105197Ssam struct mbuf *m; 4914105197Ssam const struct sadb_msghdr *mhp; 4915105197Ssam{ 4916105197Ssam const struct sadb_ident *idsrc, *iddst; 4917105197Ssam int idsrclen, iddstlen; 4918105197Ssam 4919120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 4920120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4921120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4922120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4923105197Ssam 4924105197Ssam /* don't make buffer if not there */ 4925105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 4926105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 4927105197Ssam sah->idents = NULL; 4928105197Ssam sah->identd = NULL; 4929105197Ssam return 0; 4930105197Ssam } 4931105197Ssam 4932105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 4933105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 4934120585Ssam ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 4935105197Ssam return EINVAL; 4936105197Ssam } 4937105197Ssam 4938105197Ssam idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 4939105197Ssam iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 4940105197Ssam idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 4941105197Ssam iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 4942105197Ssam 4943105197Ssam /* validity check */ 4944105197Ssam if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 4945120585Ssam ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 4946105197Ssam return EINVAL; 4947105197Ssam } 4948105197Ssam 4949105197Ssam switch (idsrc->sadb_ident_type) { 4950105197Ssam case SADB_IDENTTYPE_PREFIX: 4951105197Ssam case SADB_IDENTTYPE_FQDN: 4952105197Ssam case SADB_IDENTTYPE_USERFQDN: 4953105197Ssam default: 4954105197Ssam /* XXX do nothing */ 4955105197Ssam sah->idents = NULL; 4956105197Ssam sah->identd = NULL; 4957105197Ssam return 0; 4958105197Ssam } 4959105197Ssam 4960105197Ssam /* make structure */ 4961119643Ssam sah->idents = malloc(idsrclen, M_IPSEC_MISC, M_NOWAIT); 4962105197Ssam if (sah->idents == NULL) { 4963120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 4964105197Ssam return ENOBUFS; 4965105197Ssam } 4966119643Ssam sah->identd = malloc(iddstlen, M_IPSEC_MISC, M_NOWAIT); 4967105197Ssam if (sah->identd == NULL) { 4968119643Ssam free(sah->idents, M_IPSEC_MISC); 4969105197Ssam sah->idents = NULL; 4970120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 4971105197Ssam return ENOBUFS; 4972105197Ssam } 4973105197Ssam bcopy(idsrc, sah->idents, idsrclen); 4974105197Ssam bcopy(iddst, sah->identd, iddstlen); 4975105197Ssam 4976105197Ssam return 0; 4977105197Ssam} 4978105197Ssam 4979105197Ssam/* 4980105197Ssam * m will not be freed on return. 4981105197Ssam * it is caller's responsibility to free the result. 4982105197Ssam */ 4983105197Ssamstatic struct mbuf * 4984105197Ssamkey_getmsgbuf_x1(m, mhp) 4985105197Ssam struct mbuf *m; 4986105197Ssam const struct sadb_msghdr *mhp; 4987105197Ssam{ 4988105197Ssam struct mbuf *n; 4989105197Ssam 4990120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4991120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4992120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4993105197Ssam 4994105197Ssam /* create new sadb_msg to reply. */ 4995105197Ssam n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 4996105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 4997105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 4998105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 4999105197Ssam SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5000105197Ssam if (!n) 5001105197Ssam return NULL; 5002105197Ssam 5003105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5004105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5005105197Ssam if (n == NULL) 5006105197Ssam return NULL; 5007105197Ssam } 5008105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5009105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_len = 5010105197Ssam PFKEY_UNIT64(n->m_pkthdr.len); 5011105197Ssam 5012105197Ssam return n; 5013105197Ssam} 5014105197Ssam 5015105197Ssamstatic int key_delete_all __P((struct socket *, struct mbuf *, 5016105197Ssam const struct sadb_msghdr *, u_int16_t)); 5017105197Ssam 5018105197Ssam/* 5019105197Ssam * SADB_DELETE processing 5020105197Ssam * receive 5021105197Ssam * <base, SA(*), address(SD)> 5022105197Ssam * from the ikmpd, and set SADB_SASTATE_DEAD, 5023105197Ssam * and send, 5024105197Ssam * <base, SA(*), address(SD)> 5025105197Ssam * to the ikmpd. 5026105197Ssam * 5027105197Ssam * m will always be freed. 5028105197Ssam */ 5029105197Ssamstatic int 5030105197Ssamkey_delete(so, m, mhp) 5031105197Ssam struct socket *so; 5032105197Ssam struct mbuf *m; 5033105197Ssam const struct sadb_msghdr *mhp; 5034105197Ssam{ 5035105197Ssam struct sadb_sa *sa0; 5036105197Ssam struct sadb_address *src0, *dst0; 5037105197Ssam struct secasindex saidx; 5038105197Ssam struct secashead *sah; 5039105197Ssam struct secasvar *sav = NULL; 5040105197Ssam u_int16_t proto; 5041105197Ssam 5042120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5043120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5044120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5045120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5046105197Ssam 5047105197Ssam /* map satype to proto */ 5048105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5049120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5050120585Ssam __func__)); 5051105197Ssam return key_senderror(so, m, EINVAL); 5052105197Ssam } 5053105197Ssam 5054105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5055105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5056120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5057120585Ssam __func__)); 5058105197Ssam return key_senderror(so, m, EINVAL); 5059105197Ssam } 5060105197Ssam 5061105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5062105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5063120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5064120585Ssam __func__)); 5065105197Ssam return key_senderror(so, m, EINVAL); 5066105197Ssam } 5067105197Ssam 5068105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 5069105197Ssam /* 5070105197Ssam * Caller wants us to delete all non-LARVAL SAs 5071105197Ssam * that match the src/dst. This is used during 5072105197Ssam * IKE INITIAL-CONTACT. 5073105197Ssam */ 5074120585Ssam ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5075105197Ssam return key_delete_all(so, m, mhp, proto); 5076105197Ssam } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5077120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5078120585Ssam __func__)); 5079105197Ssam return key_senderror(so, m, EINVAL); 5080105197Ssam } 5081105197Ssam 5082105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5083105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5084105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5085105197Ssam 5086105197Ssam /* XXX boundary check against sa_len */ 5087105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5088105197Ssam 5089105197Ssam /* get a SA header */ 5090120585Ssam SAHTREE_LOCK(); 5091105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 5092105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5093105197Ssam continue; 5094105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5095105197Ssam continue; 5096105197Ssam 5097105197Ssam /* get a SA with SPI. */ 5098105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5099105197Ssam if (sav) 5100105197Ssam break; 5101105197Ssam } 5102105197Ssam if (sah == NULL) { 5103120585Ssam SAHTREE_UNLOCK(); 5104120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5105105197Ssam return key_senderror(so, m, ENOENT); 5106105197Ssam } 5107105197Ssam 5108105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5109120585Ssam SAHTREE_UNLOCK(); 5110105197Ssam KEY_FREESAV(&sav); 5111105197Ssam 5112105197Ssam { 5113105197Ssam struct mbuf *n; 5114105197Ssam struct sadb_msg *newmsg; 5115105197Ssam 5116105197Ssam /* create new sadb_msg to reply. */ 5117105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5118105197Ssam SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5119105197Ssam if (!n) 5120105197Ssam return key_senderror(so, m, ENOBUFS); 5121105197Ssam 5122105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5123105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5124105197Ssam if (n == NULL) 5125105197Ssam return key_senderror(so, m, ENOBUFS); 5126105197Ssam } 5127105197Ssam newmsg = mtod(n, struct sadb_msg *); 5128105197Ssam newmsg->sadb_msg_errno = 0; 5129105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5130105197Ssam 5131105197Ssam m_freem(m); 5132105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5133105197Ssam } 5134105197Ssam} 5135105197Ssam 5136105197Ssam/* 5137105197Ssam * delete all SAs for src/dst. Called from key_delete(). 5138105197Ssam */ 5139105197Ssamstatic int 5140105197Ssamkey_delete_all(so, m, mhp, proto) 5141105197Ssam struct socket *so; 5142105197Ssam struct mbuf *m; 5143105197Ssam const struct sadb_msghdr *mhp; 5144105197Ssam u_int16_t proto; 5145105197Ssam{ 5146105197Ssam struct sadb_address *src0, *dst0; 5147105197Ssam struct secasindex saidx; 5148105197Ssam struct secashead *sah; 5149105197Ssam struct secasvar *sav, *nextsav; 5150105197Ssam u_int stateidx, state; 5151105197Ssam 5152105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5153105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5154105197Ssam 5155105197Ssam /* XXX boundary check against sa_len */ 5156105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5157105197Ssam 5158120585Ssam SAHTREE_LOCK(); 5159105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 5160105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5161105197Ssam continue; 5162105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5163105197Ssam continue; 5164105197Ssam 5165105197Ssam /* Delete all non-LARVAL SAs. */ 5166105197Ssam for (stateidx = 0; 5167105197Ssam stateidx < _ARRAYLEN(saorder_state_alive); 5168105197Ssam stateidx++) { 5169105197Ssam state = saorder_state_alive[stateidx]; 5170105197Ssam if (state == SADB_SASTATE_LARVAL) 5171105197Ssam continue; 5172105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 5173105197Ssam sav != NULL; sav = nextsav) { 5174105197Ssam nextsav = LIST_NEXT(sav, chain); 5175105197Ssam /* sanity check */ 5176105197Ssam if (sav->state != state) { 5177120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 5178120585Ssam "sav->state (queue %d SA %d)\n", 5179120585Ssam __func__, state, sav->state)); 5180105197Ssam continue; 5181105197Ssam } 5182105197Ssam 5183105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5184105197Ssam KEY_FREESAV(&sav); 5185105197Ssam } 5186105197Ssam } 5187105197Ssam } 5188120585Ssam SAHTREE_UNLOCK(); 5189105197Ssam { 5190105197Ssam struct mbuf *n; 5191105197Ssam struct sadb_msg *newmsg; 5192105197Ssam 5193105197Ssam /* create new sadb_msg to reply. */ 5194105197Ssam n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5195105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5196105197Ssam if (!n) 5197105197Ssam return key_senderror(so, m, ENOBUFS); 5198105197Ssam 5199105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5200105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5201105197Ssam if (n == NULL) 5202105197Ssam return key_senderror(so, m, ENOBUFS); 5203105197Ssam } 5204105197Ssam newmsg = mtod(n, struct sadb_msg *); 5205105197Ssam newmsg->sadb_msg_errno = 0; 5206105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5207105197Ssam 5208105197Ssam m_freem(m); 5209105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5210105197Ssam } 5211105197Ssam} 5212105197Ssam 5213105197Ssam/* 5214105197Ssam * SADB_GET processing 5215105197Ssam * receive 5216105197Ssam * <base, SA(*), address(SD)> 5217105197Ssam * from the ikmpd, and get a SP and a SA to respond, 5218105197Ssam * and send, 5219105197Ssam * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5220105197Ssam * (identity(SD),) (sensitivity)> 5221105197Ssam * to the ikmpd. 5222105197Ssam * 5223105197Ssam * m will always be freed. 5224105197Ssam */ 5225105197Ssamstatic int 5226105197Ssamkey_get(so, m, mhp) 5227105197Ssam struct socket *so; 5228105197Ssam struct mbuf *m; 5229105197Ssam const struct sadb_msghdr *mhp; 5230105197Ssam{ 5231105197Ssam struct sadb_sa *sa0; 5232105197Ssam struct sadb_address *src0, *dst0; 5233105197Ssam struct secasindex saidx; 5234105197Ssam struct secashead *sah; 5235105197Ssam struct secasvar *sav = NULL; 5236105197Ssam u_int16_t proto; 5237105197Ssam 5238120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5239120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5240120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5241120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5242105197Ssam 5243105197Ssam /* map satype to proto */ 5244105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5245120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5246120585Ssam __func__)); 5247105197Ssam return key_senderror(so, m, EINVAL); 5248105197Ssam } 5249105197Ssam 5250105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5251105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5252105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5253120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5254120585Ssam __func__)); 5255105197Ssam return key_senderror(so, m, EINVAL); 5256105197Ssam } 5257105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5258105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5259105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5260120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5261120585Ssam __func__)); 5262105197Ssam return key_senderror(so, m, EINVAL); 5263105197Ssam } 5264105197Ssam 5265105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5266105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5267105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5268105197Ssam 5269105197Ssam /* XXX boundary check against sa_len */ 5270105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5271105197Ssam 5272105197Ssam /* get a SA header */ 5273120585Ssam SAHTREE_LOCK(); 5274105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 5275105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5276105197Ssam continue; 5277105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5278105197Ssam continue; 5279105197Ssam 5280105197Ssam /* get a SA with SPI. */ 5281105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5282105197Ssam if (sav) 5283105197Ssam break; 5284105197Ssam } 5285120585Ssam SAHTREE_UNLOCK(); 5286105197Ssam if (sah == NULL) { 5287120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5288105197Ssam return key_senderror(so, m, ENOENT); 5289105197Ssam } 5290105197Ssam 5291105197Ssam { 5292105197Ssam struct mbuf *n; 5293105197Ssam u_int8_t satype; 5294105197Ssam 5295105197Ssam /* map proto to satype */ 5296105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5297120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5298120585Ssam __func__)); 5299105197Ssam return key_senderror(so, m, EINVAL); 5300105197Ssam } 5301105197Ssam 5302105197Ssam /* create new sadb_msg to reply. */ 5303105197Ssam n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5304105197Ssam mhp->msg->sadb_msg_pid); 5305105197Ssam if (!n) 5306105197Ssam return key_senderror(so, m, ENOBUFS); 5307105197Ssam 5308105197Ssam m_freem(m); 5309105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5310105197Ssam } 5311105197Ssam} 5312105197Ssam 5313105197Ssam/* XXX make it sysctl-configurable? */ 5314105197Ssamstatic void 5315105197Ssamkey_getcomb_setlifetime(comb) 5316105197Ssam struct sadb_comb *comb; 5317105197Ssam{ 5318105197Ssam 5319105197Ssam comb->sadb_comb_soft_allocations = 1; 5320105197Ssam comb->sadb_comb_hard_allocations = 1; 5321105197Ssam comb->sadb_comb_soft_bytes = 0; 5322105197Ssam comb->sadb_comb_hard_bytes = 0; 5323105197Ssam comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5324105197Ssam comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5325105197Ssam comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5326105197Ssam comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5327105197Ssam} 5328105197Ssam 5329105197Ssam/* 5330105197Ssam * XXX reorder combinations by preference 5331105197Ssam * XXX no idea if the user wants ESP authentication or not 5332105197Ssam */ 5333105197Ssamstatic struct mbuf * 5334105197Ssamkey_getcomb_esp() 5335105197Ssam{ 5336105197Ssam struct sadb_comb *comb; 5337105197Ssam struct enc_xform *algo; 5338105197Ssam struct mbuf *result = NULL, *m, *n; 5339105197Ssam int encmin; 5340105197Ssam int i, off, o; 5341105197Ssam int totlen; 5342105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5343105197Ssam 5344105197Ssam m = NULL; 5345105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 5346105197Ssam algo = esp_algorithm_lookup(i); 5347105197Ssam if (algo == NULL) 5348105197Ssam continue; 5349105197Ssam 5350105197Ssam /* discard algorithms with key size smaller than system min */ 5351105197Ssam if (_BITS(algo->maxkey) < ipsec_esp_keymin) 5352105197Ssam continue; 5353105197Ssam if (_BITS(algo->minkey) < ipsec_esp_keymin) 5354105197Ssam encmin = ipsec_esp_keymin; 5355105197Ssam else 5356105197Ssam encmin = _BITS(algo->minkey); 5357105197Ssam 5358105197Ssam if (ipsec_esp_auth) 5359105197Ssam m = key_getcomb_ah(); 5360105197Ssam else { 5361120585Ssam IPSEC_ASSERT(l <= MLEN, 5362120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5363111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5364105197Ssam if (m) { 5365105197Ssam M_ALIGN(m, l); 5366105197Ssam m->m_len = l; 5367105197Ssam m->m_next = NULL; 5368105197Ssam bzero(mtod(m, caddr_t), m->m_len); 5369105197Ssam } 5370105197Ssam } 5371105197Ssam if (!m) 5372105197Ssam goto fail; 5373105197Ssam 5374105197Ssam totlen = 0; 5375105197Ssam for (n = m; n; n = n->m_next) 5376105197Ssam totlen += n->m_len; 5377120585Ssam IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 5378105197Ssam 5379105197Ssam for (off = 0; off < totlen; off += l) { 5380105197Ssam n = m_pulldown(m, off, l, &o); 5381105197Ssam if (!n) { 5382105197Ssam /* m is already freed */ 5383105197Ssam goto fail; 5384105197Ssam } 5385105197Ssam comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 5386105197Ssam bzero(comb, sizeof(*comb)); 5387105197Ssam key_getcomb_setlifetime(comb); 5388105197Ssam comb->sadb_comb_encrypt = i; 5389105197Ssam comb->sadb_comb_encrypt_minbits = encmin; 5390105197Ssam comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 5391105197Ssam } 5392105197Ssam 5393105197Ssam if (!result) 5394105197Ssam result = m; 5395105197Ssam else 5396105197Ssam m_cat(result, m); 5397105197Ssam } 5398105197Ssam 5399105197Ssam return result; 5400105197Ssam 5401105197Ssam fail: 5402105197Ssam if (result) 5403105197Ssam m_freem(result); 5404105197Ssam return NULL; 5405105197Ssam} 5406105197Ssam 5407105197Ssamstatic void 5408105197Ssamkey_getsizes_ah( 5409105197Ssam const struct auth_hash *ah, 5410105197Ssam int alg, 5411105197Ssam u_int16_t* min, 5412105197Ssam u_int16_t* max) 5413105197Ssam{ 5414105197Ssam *min = *max = ah->keysize; 5415105197Ssam if (ah->keysize == 0) { 5416105197Ssam /* 5417105197Ssam * Transform takes arbitrary key size but algorithm 5418105197Ssam * key size is restricted. Enforce this here. 5419105197Ssam */ 5420105197Ssam switch (alg) { 5421105197Ssam case SADB_X_AALG_MD5: *min = *max = 16; break; 5422105197Ssam case SADB_X_AALG_SHA: *min = *max = 20; break; 5423105197Ssam case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 5424105197Ssam default: 5425120585Ssam DPRINTF(("%s: unknown AH algorithm %u\n", 5426120585Ssam __func__, alg)); 5427105197Ssam break; 5428105197Ssam } 5429105197Ssam } 5430105197Ssam} 5431105197Ssam 5432105197Ssam/* 5433105197Ssam * XXX reorder combinations by preference 5434105197Ssam */ 5435105197Ssamstatic struct mbuf * 5436105197Ssamkey_getcomb_ah() 5437105197Ssam{ 5438105197Ssam struct sadb_comb *comb; 5439105197Ssam struct auth_hash *algo; 5440105197Ssam struct mbuf *m; 5441105197Ssam u_int16_t minkeysize, maxkeysize; 5442105197Ssam int i; 5443105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5444105197Ssam 5445105197Ssam m = NULL; 5446105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 5447105197Ssam#if 1 5448105197Ssam /* we prefer HMAC algorithms, not old algorithms */ 5449105197Ssam if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 5450105197Ssam continue; 5451105197Ssam#endif 5452105197Ssam algo = ah_algorithm_lookup(i); 5453105197Ssam if (!algo) 5454105197Ssam continue; 5455105197Ssam key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 5456105197Ssam /* discard algorithms with key size smaller than system min */ 5457105197Ssam if (_BITS(minkeysize) < ipsec_ah_keymin) 5458105197Ssam continue; 5459105197Ssam 5460105197Ssam if (!m) { 5461120585Ssam IPSEC_ASSERT(l <= MLEN, 5462120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5463111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5464105197Ssam if (m) { 5465105197Ssam M_ALIGN(m, l); 5466105197Ssam m->m_len = l; 5467105197Ssam m->m_next = NULL; 5468105197Ssam } 5469105197Ssam } else 5470111119Simp M_PREPEND(m, l, M_DONTWAIT); 5471105197Ssam if (!m) 5472105197Ssam return NULL; 5473105197Ssam 5474105197Ssam comb = mtod(m, struct sadb_comb *); 5475105197Ssam bzero(comb, sizeof(*comb)); 5476105197Ssam key_getcomb_setlifetime(comb); 5477105197Ssam comb->sadb_comb_auth = i; 5478105197Ssam comb->sadb_comb_auth_minbits = _BITS(minkeysize); 5479105197Ssam comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 5480105197Ssam } 5481105197Ssam 5482105197Ssam return m; 5483105197Ssam} 5484105197Ssam 5485105197Ssam/* 5486105197Ssam * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 5487105197Ssam * XXX reorder combinations by preference 5488105197Ssam */ 5489105197Ssamstatic struct mbuf * 5490105197Ssamkey_getcomb_ipcomp() 5491105197Ssam{ 5492105197Ssam struct sadb_comb *comb; 5493105197Ssam struct comp_algo *algo; 5494105197Ssam struct mbuf *m; 5495105197Ssam int i; 5496105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 5497105197Ssam 5498105197Ssam m = NULL; 5499105197Ssam for (i = 1; i <= SADB_X_CALG_MAX; i++) { 5500105197Ssam algo = ipcomp_algorithm_lookup(i); 5501105197Ssam if (!algo) 5502105197Ssam continue; 5503105197Ssam 5504105197Ssam if (!m) { 5505120585Ssam IPSEC_ASSERT(l <= MLEN, 5506120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 5507111119Simp MGET(m, M_DONTWAIT, MT_DATA); 5508105197Ssam if (m) { 5509105197Ssam M_ALIGN(m, l); 5510105197Ssam m->m_len = l; 5511105197Ssam m->m_next = NULL; 5512105197Ssam } 5513105197Ssam } else 5514111119Simp M_PREPEND(m, l, M_DONTWAIT); 5515105197Ssam if (!m) 5516105197Ssam return NULL; 5517105197Ssam 5518105197Ssam comb = mtod(m, struct sadb_comb *); 5519105197Ssam bzero(comb, sizeof(*comb)); 5520105197Ssam key_getcomb_setlifetime(comb); 5521105197Ssam comb->sadb_comb_encrypt = i; 5522105197Ssam /* what should we set into sadb_comb_*_{min,max}bits? */ 5523105197Ssam } 5524105197Ssam 5525105197Ssam return m; 5526105197Ssam} 5527105197Ssam 5528105197Ssam/* 5529105197Ssam * XXX no way to pass mode (transport/tunnel) to userland 5530105197Ssam * XXX replay checking? 5531105197Ssam * XXX sysctl interface to ipsec_{ah,esp}_keymin 5532105197Ssam */ 5533105197Ssamstatic struct mbuf * 5534105197Ssamkey_getprop(saidx) 5535105197Ssam const struct secasindex *saidx; 5536105197Ssam{ 5537105197Ssam struct sadb_prop *prop; 5538105197Ssam struct mbuf *m, *n; 5539105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 5540105197Ssam int totlen; 5541105197Ssam 5542105197Ssam switch (saidx->proto) { 5543105197Ssam case IPPROTO_ESP: 5544105197Ssam m = key_getcomb_esp(); 5545105197Ssam break; 5546105197Ssam case IPPROTO_AH: 5547105197Ssam m = key_getcomb_ah(); 5548105197Ssam break; 5549105197Ssam case IPPROTO_IPCOMP: 5550105197Ssam m = key_getcomb_ipcomp(); 5551105197Ssam break; 5552105197Ssam default: 5553105197Ssam return NULL; 5554105197Ssam } 5555105197Ssam 5556105197Ssam if (!m) 5557105197Ssam return NULL; 5558111119Simp M_PREPEND(m, l, M_DONTWAIT); 5559105197Ssam if (!m) 5560105197Ssam return NULL; 5561105197Ssam 5562105197Ssam totlen = 0; 5563105197Ssam for (n = m; n; n = n->m_next) 5564105197Ssam totlen += n->m_len; 5565105197Ssam 5566105197Ssam prop = mtod(m, struct sadb_prop *); 5567105197Ssam bzero(prop, sizeof(*prop)); 5568105197Ssam prop->sadb_prop_len = PFKEY_UNIT64(totlen); 5569105197Ssam prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 5570105197Ssam prop->sadb_prop_replay = 32; /* XXX */ 5571105197Ssam 5572105197Ssam return m; 5573105197Ssam} 5574105197Ssam 5575105197Ssam/* 5576105197Ssam * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 5577105197Ssam * send 5578105197Ssam * <base, SA, address(SD), (address(P)), x_policy, 5579105197Ssam * (identity(SD),) (sensitivity,) proposal> 5580105197Ssam * to KMD, and expect to receive 5581105197Ssam * <base> with SADB_ACQUIRE if error occured, 5582105197Ssam * or 5583105197Ssam * <base, src address, dst address, (SPI range)> with SADB_GETSPI 5584105197Ssam * from KMD by PF_KEY. 5585105197Ssam * 5586105197Ssam * XXX x_policy is outside of RFC2367 (KAME extension). 5587105197Ssam * XXX sensitivity is not supported. 5588105197Ssam * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 5589105197Ssam * see comment for key_getcomb_ipcomp(). 5590105197Ssam * 5591105197Ssam * OUT: 5592105197Ssam * 0 : succeed 5593105197Ssam * others: error number 5594105197Ssam */ 5595105197Ssamstatic int 5596105197Ssamkey_acquire(const struct secasindex *saidx, struct secpolicy *sp) 5597105197Ssam{ 5598105197Ssam struct mbuf *result = NULL, *m; 5599105197Ssam struct secacq *newacq; 5600105197Ssam u_int8_t satype; 5601105197Ssam int error = -1; 5602105197Ssam u_int32_t seq; 5603105197Ssam 5604120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 5605105197Ssam satype = key_proto2satype(saidx->proto); 5606120585Ssam IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 5607105197Ssam 5608105197Ssam /* 5609105197Ssam * We never do anything about acquirng SA. There is anather 5610105197Ssam * solution that kernel blocks to send SADB_ACQUIRE message until 5611105197Ssam * getting something message from IKEd. In later case, to be 5612105197Ssam * managed with ACQUIRING list. 5613105197Ssam */ 5614108533Sschweikh /* Get an entry to check whether sending message or not. */ 5615105197Ssam if ((newacq = key_getacq(saidx)) != NULL) { 5616105197Ssam if (key_blockacq_count < newacq->count) { 5617105197Ssam /* reset counter and do send message. */ 5618105197Ssam newacq->count = 0; 5619105197Ssam } else { 5620105197Ssam /* increment counter and do nothing. */ 5621105197Ssam newacq->count++; 5622105197Ssam return 0; 5623105197Ssam } 5624105197Ssam } else { 5625105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 5626105197Ssam if ((newacq = key_newacq(saidx)) == NULL) 5627105197Ssam return ENOBUFS; 5628105197Ssam } 5629105197Ssam 5630105197Ssam 5631105197Ssam seq = newacq->seq; 5632105197Ssam m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 5633105197Ssam if (!m) { 5634105197Ssam error = ENOBUFS; 5635105197Ssam goto fail; 5636105197Ssam } 5637105197Ssam result = m; 5638105197Ssam 5639105197Ssam /* set sadb_address for saidx's. */ 5640105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 5641105197Ssam &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5642105197Ssam if (!m) { 5643105197Ssam error = ENOBUFS; 5644105197Ssam goto fail; 5645105197Ssam } 5646105197Ssam m_cat(result, m); 5647105197Ssam 5648105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 5649105197Ssam &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 5650105197Ssam if (!m) { 5651105197Ssam error = ENOBUFS; 5652105197Ssam goto fail; 5653105197Ssam } 5654105197Ssam m_cat(result, m); 5655105197Ssam 5656105197Ssam /* XXX proxy address (optional) */ 5657105197Ssam 5658105197Ssam /* set sadb_x_policy */ 5659105197Ssam if (sp) { 5660105197Ssam m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 5661105197Ssam if (!m) { 5662105197Ssam error = ENOBUFS; 5663105197Ssam goto fail; 5664105197Ssam } 5665105197Ssam m_cat(result, m); 5666105197Ssam } 5667105197Ssam 5668105197Ssam /* XXX identity (optional) */ 5669105197Ssam#if 0 5670105197Ssam if (idexttype && fqdn) { 5671105197Ssam /* create identity extension (FQDN) */ 5672105197Ssam struct sadb_ident *id; 5673105197Ssam int fqdnlen; 5674105197Ssam 5675105197Ssam fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 5676105197Ssam id = (struct sadb_ident *)p; 5677105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5678105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 5679105197Ssam id->sadb_ident_exttype = idexttype; 5680105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 5681105197Ssam bcopy(fqdn, id + 1, fqdnlen); 5682105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 5683105197Ssam } 5684105197Ssam 5685105197Ssam if (idexttype) { 5686105197Ssam /* create identity extension (USERFQDN) */ 5687105197Ssam struct sadb_ident *id; 5688105197Ssam int userfqdnlen; 5689105197Ssam 5690105197Ssam if (userfqdn) { 5691105197Ssam /* +1 for terminating-NUL */ 5692105197Ssam userfqdnlen = strlen(userfqdn) + 1; 5693105197Ssam } else 5694105197Ssam userfqdnlen = 0; 5695105197Ssam id = (struct sadb_ident *)p; 5696105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5697105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 5698105197Ssam id->sadb_ident_exttype = idexttype; 5699105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 5700105197Ssam /* XXX is it correct? */ 5701105197Ssam if (curproc && curproc->p_cred) 5702105197Ssam id->sadb_ident_id = curproc->p_cred->p_ruid; 5703105197Ssam if (userfqdn && userfqdnlen) 5704105197Ssam bcopy(userfqdn, id + 1, userfqdnlen); 5705105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 5706105197Ssam } 5707105197Ssam#endif 5708105197Ssam 5709105197Ssam /* XXX sensitivity (optional) */ 5710105197Ssam 5711105197Ssam /* create proposal/combination extension */ 5712105197Ssam m = key_getprop(saidx); 5713105197Ssam#if 0 5714105197Ssam /* 5715105197Ssam * spec conformant: always attach proposal/combination extension, 5716105197Ssam * the problem is that we have no way to attach it for ipcomp, 5717105197Ssam * due to the way sadb_comb is declared in RFC2367. 5718105197Ssam */ 5719105197Ssam if (!m) { 5720105197Ssam error = ENOBUFS; 5721105197Ssam goto fail; 5722105197Ssam } 5723105197Ssam m_cat(result, m); 5724105197Ssam#else 5725105197Ssam /* 5726105197Ssam * outside of spec; make proposal/combination extension optional. 5727105197Ssam */ 5728105197Ssam if (m) 5729105197Ssam m_cat(result, m); 5730105197Ssam#endif 5731105197Ssam 5732105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 5733105197Ssam error = EINVAL; 5734105197Ssam goto fail; 5735105197Ssam } 5736105197Ssam 5737105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 5738105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 5739105197Ssam if (result == NULL) { 5740105197Ssam error = ENOBUFS; 5741105197Ssam goto fail; 5742105197Ssam } 5743105197Ssam } 5744105197Ssam 5745105197Ssam result->m_pkthdr.len = 0; 5746105197Ssam for (m = result; m; m = m->m_next) 5747105197Ssam result->m_pkthdr.len += m->m_len; 5748105197Ssam 5749105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 5750105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 5751105197Ssam 5752105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 5753105197Ssam 5754105197Ssam fail: 5755105197Ssam if (result) 5756105197Ssam m_freem(result); 5757105197Ssam return error; 5758105197Ssam} 5759105197Ssam 5760105197Ssamstatic struct secacq * 5761105197Ssamkey_newacq(const struct secasindex *saidx) 5762105197Ssam{ 5763105197Ssam struct secacq *newacq; 5764105197Ssam 5765105197Ssam /* get new entry */ 5766119643Ssam newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 5767105197Ssam if (newacq == NULL) { 5768120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5769105197Ssam return NULL; 5770105197Ssam } 5771105197Ssam 5772105197Ssam /* copy secindex */ 5773105197Ssam bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 5774105197Ssam newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 5775105197Ssam newacq->created = time_second; 5776105197Ssam newacq->count = 0; 5777105197Ssam 5778119643Ssam /* add to acqtree */ 5779120585Ssam ACQ_LOCK(); 5780119643Ssam LIST_INSERT_HEAD(&acqtree, newacq, chain); 5781120585Ssam ACQ_UNLOCK(); 5782119643Ssam 5783105197Ssam return newacq; 5784105197Ssam} 5785105197Ssam 5786105197Ssamstatic struct secacq * 5787105197Ssamkey_getacq(const struct secasindex *saidx) 5788105197Ssam{ 5789105197Ssam struct secacq *acq; 5790105197Ssam 5791120585Ssam ACQ_LOCK(); 5792105197Ssam LIST_FOREACH(acq, &acqtree, chain) { 5793105197Ssam if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 5794119643Ssam break; 5795105197Ssam } 5796120585Ssam ACQ_UNLOCK(); 5797105197Ssam 5798119643Ssam return acq; 5799105197Ssam} 5800105197Ssam 5801105197Ssamstatic struct secacq * 5802105197Ssamkey_getacqbyseq(seq) 5803105197Ssam u_int32_t seq; 5804105197Ssam{ 5805105197Ssam struct secacq *acq; 5806105197Ssam 5807120585Ssam ACQ_LOCK(); 5808105197Ssam LIST_FOREACH(acq, &acqtree, chain) { 5809105197Ssam if (acq->seq == seq) 5810119643Ssam break; 5811105197Ssam } 5812120585Ssam ACQ_UNLOCK(); 5813105197Ssam 5814119643Ssam return acq; 5815105197Ssam} 5816105197Ssam 5817105197Ssamstatic struct secspacq * 5818105197Ssamkey_newspacq(spidx) 5819105197Ssam struct secpolicyindex *spidx; 5820105197Ssam{ 5821105197Ssam struct secspacq *acq; 5822105197Ssam 5823105197Ssam /* get new entry */ 5824119643Ssam acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 5825105197Ssam if (acq == NULL) { 5826120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5827105197Ssam return NULL; 5828105197Ssam } 5829105197Ssam 5830105197Ssam /* copy secindex */ 5831105197Ssam bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 5832105197Ssam acq->created = time_second; 5833105197Ssam acq->count = 0; 5834105197Ssam 5835119643Ssam /* add to spacqtree */ 5836120585Ssam SPACQ_LOCK(); 5837119643Ssam LIST_INSERT_HEAD(&spacqtree, acq, chain); 5838120585Ssam SPACQ_UNLOCK(); 5839119643Ssam 5840105197Ssam return acq; 5841105197Ssam} 5842105197Ssam 5843105197Ssamstatic struct secspacq * 5844105197Ssamkey_getspacq(spidx) 5845105197Ssam struct secpolicyindex *spidx; 5846105197Ssam{ 5847105197Ssam struct secspacq *acq; 5848105197Ssam 5849120585Ssam SPACQ_LOCK(); 5850105197Ssam LIST_FOREACH(acq, &spacqtree, chain) { 5851119643Ssam if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 5852119643Ssam /* NB: return holding spacq_lock */ 5853105197Ssam return acq; 5854119643Ssam } 5855105197Ssam } 5856120585Ssam SPACQ_UNLOCK(); 5857105197Ssam 5858105197Ssam return NULL; 5859105197Ssam} 5860105197Ssam 5861105197Ssam/* 5862105197Ssam * SADB_ACQUIRE processing, 5863105197Ssam * in first situation, is receiving 5864105197Ssam * <base> 5865105197Ssam * from the ikmpd, and clear sequence of its secasvar entry. 5866105197Ssam * 5867105197Ssam * In second situation, is receiving 5868105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 5869105197Ssam * from a user land process, and return 5870105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 5871105197Ssam * to the socket. 5872105197Ssam * 5873105197Ssam * m will always be freed. 5874105197Ssam */ 5875105197Ssamstatic int 5876105197Ssamkey_acquire2(so, m, mhp) 5877105197Ssam struct socket *so; 5878105197Ssam struct mbuf *m; 5879105197Ssam const struct sadb_msghdr *mhp; 5880105197Ssam{ 5881105197Ssam const struct sadb_address *src0, *dst0; 5882105197Ssam struct secasindex saidx; 5883105197Ssam struct secashead *sah; 5884105197Ssam u_int16_t proto; 5885105197Ssam int error; 5886105197Ssam 5887120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5888120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5889120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5890120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5891105197Ssam 5892105197Ssam /* 5893105197Ssam * Error message from KMd. 5894105197Ssam * We assume that if error was occured in IKEd, the length of PFKEY 5895105197Ssam * message is equal to the size of sadb_msg structure. 5896105197Ssam * We do not raise error even if error occured in this function. 5897105197Ssam */ 5898105197Ssam if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 5899105197Ssam struct secacq *acq; 5900105197Ssam 5901105197Ssam /* check sequence number */ 5902105197Ssam if (mhp->msg->sadb_msg_seq == 0) { 5903120585Ssam ipseclog((LOG_DEBUG, "%s: must specify sequence " 5904120585Ssam "number.\n", __func__)); 5905105197Ssam m_freem(m); 5906105197Ssam return 0; 5907105197Ssam } 5908105197Ssam 5909105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 5910105197Ssam /* 5911105197Ssam * the specified larval SA is already gone, or we got 5912105197Ssam * a bogus sequence number. we can silently ignore it. 5913105197Ssam */ 5914105197Ssam m_freem(m); 5915105197Ssam return 0; 5916105197Ssam } 5917105197Ssam 5918105197Ssam /* reset acq counter in order to deletion by timehander. */ 5919105197Ssam acq->created = time_second; 5920105197Ssam acq->count = 0; 5921105197Ssam m_freem(m); 5922105197Ssam return 0; 5923105197Ssam } 5924105197Ssam 5925105197Ssam /* 5926105197Ssam * This message is from user land. 5927105197Ssam */ 5928105197Ssam 5929105197Ssam /* map satype to proto */ 5930105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5931120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5932120585Ssam __func__)); 5933105197Ssam return key_senderror(so, m, EINVAL); 5934105197Ssam } 5935105197Ssam 5936105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5937105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5938105197Ssam mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 5939105197Ssam /* error */ 5940120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5941120585Ssam __func__)); 5942105197Ssam return key_senderror(so, m, EINVAL); 5943105197Ssam } 5944105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5945105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 5946105197Ssam mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 5947105197Ssam /* error */ 5948120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5949120585Ssam __func__)); 5950105197Ssam return key_senderror(so, m, EINVAL); 5951105197Ssam } 5952105197Ssam 5953105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5954105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5955105197Ssam 5956105197Ssam /* XXX boundary check against sa_len */ 5957105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5958105197Ssam 5959105197Ssam /* get a SA index */ 5960120585Ssam SAHTREE_LOCK(); 5961105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 5962105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5963105197Ssam continue; 5964105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 5965105197Ssam break; 5966105197Ssam } 5967120585Ssam SAHTREE_UNLOCK(); 5968105197Ssam if (sah != NULL) { 5969120585Ssam ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 5970105197Ssam return key_senderror(so, m, EEXIST); 5971105197Ssam } 5972105197Ssam 5973105197Ssam error = key_acquire(&saidx, NULL); 5974105197Ssam if (error != 0) { 5975120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 5976120585Ssam __func__, mhp->msg->sadb_msg_errno)); 5977105197Ssam return key_senderror(so, m, error); 5978105197Ssam } 5979105197Ssam 5980105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 5981105197Ssam} 5982105197Ssam 5983105197Ssam/* 5984105197Ssam * SADB_REGISTER processing. 5985105197Ssam * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 5986105197Ssam * receive 5987105197Ssam * <base> 5988105197Ssam * from the ikmpd, and register a socket to send PF_KEY messages, 5989105197Ssam * and send 5990105197Ssam * <base, supported> 5991105197Ssam * to KMD by PF_KEY. 5992105197Ssam * If socket is detached, must free from regnode. 5993105197Ssam * 5994105197Ssam * m will always be freed. 5995105197Ssam */ 5996105197Ssamstatic int 5997105197Ssamkey_register(so, m, mhp) 5998105197Ssam struct socket *so; 5999105197Ssam struct mbuf *m; 6000105197Ssam const struct sadb_msghdr *mhp; 6001105197Ssam{ 6002105197Ssam struct secreg *reg, *newreg = 0; 6003105197Ssam 6004120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6005120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6006120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6007120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6008105197Ssam 6009105197Ssam /* check for invalid register message */ 6010105197Ssam if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0])) 6011105197Ssam return key_senderror(so, m, EINVAL); 6012105197Ssam 6013105197Ssam /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6014105197Ssam if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6015105197Ssam goto setmsg; 6016105197Ssam 6017105197Ssam /* check whether existing or not */ 6018120585Ssam REGTREE_LOCK(); 6019105197Ssam LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) { 6020105197Ssam if (reg->so == so) { 6021120585Ssam REGTREE_UNLOCK(); 6022120585Ssam ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6023120585Ssam __func__)); 6024105197Ssam return key_senderror(so, m, EEXIST); 6025105197Ssam } 6026105197Ssam } 6027105197Ssam 6028105197Ssam /* create regnode */ 6029119643Ssam newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6030105197Ssam if (newreg == NULL) { 6031120585Ssam REGTREE_UNLOCK(); 6032120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6033105197Ssam return key_senderror(so, m, ENOBUFS); 6034105197Ssam } 6035105197Ssam 6036105197Ssam newreg->so = so; 6037105197Ssam ((struct keycb *)sotorawcb(so))->kp_registered++; 6038105197Ssam 6039105197Ssam /* add regnode to regtree. */ 6040105197Ssam LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain); 6041120585Ssam REGTREE_UNLOCK(); 6042105197Ssam 6043105197Ssam setmsg: 6044105197Ssam { 6045105197Ssam struct mbuf *n; 6046105197Ssam struct sadb_msg *newmsg; 6047105197Ssam struct sadb_supported *sup; 6048105197Ssam u_int len, alen, elen; 6049105197Ssam int off; 6050105197Ssam int i; 6051105197Ssam struct sadb_alg *alg; 6052105197Ssam 6053105197Ssam /* create new sadb_msg to reply. */ 6054105197Ssam alen = 0; 6055105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6056105197Ssam if (ah_algorithm_lookup(i)) 6057105197Ssam alen += sizeof(struct sadb_alg); 6058105197Ssam } 6059105197Ssam if (alen) 6060105197Ssam alen += sizeof(struct sadb_supported); 6061105197Ssam elen = 0; 6062105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6063105197Ssam if (esp_algorithm_lookup(i)) 6064105197Ssam elen += sizeof(struct sadb_alg); 6065105197Ssam } 6066105197Ssam if (elen) 6067105197Ssam elen += sizeof(struct sadb_supported); 6068105197Ssam 6069105197Ssam len = sizeof(struct sadb_msg) + alen + elen; 6070105197Ssam 6071105197Ssam if (len > MCLBYTES) 6072105197Ssam return key_senderror(so, m, ENOBUFS); 6073105197Ssam 6074111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6075105197Ssam if (len > MHLEN) { 6076111119Simp MCLGET(n, M_DONTWAIT); 6077105197Ssam if ((n->m_flags & M_EXT) == 0) { 6078105197Ssam m_freem(n); 6079105197Ssam n = NULL; 6080105197Ssam } 6081105197Ssam } 6082105197Ssam if (!n) 6083105197Ssam return key_senderror(so, m, ENOBUFS); 6084105197Ssam 6085105197Ssam n->m_pkthdr.len = n->m_len = len; 6086105197Ssam n->m_next = NULL; 6087105197Ssam off = 0; 6088105197Ssam 6089105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6090105197Ssam newmsg = mtod(n, struct sadb_msg *); 6091105197Ssam newmsg->sadb_msg_errno = 0; 6092105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6093105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6094105197Ssam 6095105197Ssam /* for authentication algorithm */ 6096105197Ssam if (alen) { 6097105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6098105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(alen); 6099105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6100105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6101105197Ssam 6102105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6103105197Ssam struct auth_hash *aalgo; 6104105197Ssam u_int16_t minkeysize, maxkeysize; 6105105197Ssam 6106105197Ssam aalgo = ah_algorithm_lookup(i); 6107105197Ssam if (!aalgo) 6108105197Ssam continue; 6109105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6110105197Ssam alg->sadb_alg_id = i; 6111105197Ssam alg->sadb_alg_ivlen = 0; 6112105197Ssam key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6113105197Ssam alg->sadb_alg_minbits = _BITS(minkeysize); 6114105197Ssam alg->sadb_alg_maxbits = _BITS(maxkeysize); 6115105197Ssam off += PFKEY_ALIGN8(sizeof(*alg)); 6116105197Ssam } 6117105197Ssam } 6118105197Ssam 6119105197Ssam /* for encryption algorithm */ 6120105197Ssam if (elen) { 6121105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6122105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(elen); 6123105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6124105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6125105197Ssam 6126105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6127105197Ssam struct enc_xform *ealgo; 6128105197Ssam 6129105197Ssam ealgo = esp_algorithm_lookup(i); 6130105197Ssam if (!ealgo) 6131105197Ssam continue; 6132105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6133105197Ssam alg->sadb_alg_id = i; 6134105197Ssam alg->sadb_alg_ivlen = ealgo->blocksize; 6135105197Ssam alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6136105197Ssam alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6137105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6138105197Ssam } 6139105197Ssam } 6140105197Ssam 6141120585Ssam IPSEC_ASSERT(off == len, 6142120585Ssam ("length assumption failed (off %u len %u)", off, len)); 6143105197Ssam 6144105197Ssam m_freem(m); 6145105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6146105197Ssam } 6147105197Ssam} 6148105197Ssam 6149105197Ssam/* 6150105197Ssam * free secreg entry registered. 6151105197Ssam * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6152105197Ssam */ 6153105197Ssamvoid 6154119643Ssamkey_freereg(struct socket *so) 6155105197Ssam{ 6156105197Ssam struct secreg *reg; 6157105197Ssam int i; 6158105197Ssam 6159120585Ssam IPSEC_ASSERT(so != NULL, ("NULL so")); 6160105197Ssam 6161105197Ssam /* 6162105197Ssam * check whether existing or not. 6163105197Ssam * check all type of SA, because there is a potential that 6164105197Ssam * one socket is registered to multiple type of SA. 6165105197Ssam */ 6166120585Ssam REGTREE_LOCK(); 6167105197Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6168105197Ssam LIST_FOREACH(reg, ®tree[i], chain) { 6169119643Ssam if (reg->so == so && __LIST_CHAINED(reg)) { 6170105197Ssam LIST_REMOVE(reg, chain); 6171119643Ssam free(reg, M_IPSEC_SAR); 6172105197Ssam break; 6173105197Ssam } 6174105197Ssam } 6175105197Ssam } 6176120585Ssam REGTREE_UNLOCK(); 6177105197Ssam} 6178105197Ssam 6179105197Ssam/* 6180105197Ssam * SADB_EXPIRE processing 6181105197Ssam * send 6182105197Ssam * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6183105197Ssam * to KMD by PF_KEY. 6184105197Ssam * NOTE: We send only soft lifetime extension. 6185105197Ssam * 6186105197Ssam * OUT: 0 : succeed 6187105197Ssam * others : error number 6188105197Ssam */ 6189105197Ssamstatic int 6190119643Ssamkey_expire(struct secasvar *sav) 6191105197Ssam{ 6192105197Ssam int s; 6193105197Ssam int satype; 6194105197Ssam struct mbuf *result = NULL, *m; 6195105197Ssam int len; 6196105197Ssam int error = -1; 6197105197Ssam struct sadb_lifetime *lt; 6198105197Ssam 6199105197Ssam /* XXX: Why do we lock ? */ 6200105197Ssam s = splnet(); /*called from softclock()*/ 6201105197Ssam 6202120585Ssam IPSEC_ASSERT (sav != NULL, ("null sav")); 6203120585Ssam IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6204105197Ssam 6205105197Ssam /* set msg header */ 6206120585Ssam satype = key_proto2satype(sav->sah->saidx.proto); 6207120585Ssam IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6208105197Ssam m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6209105197Ssam if (!m) { 6210105197Ssam error = ENOBUFS; 6211105197Ssam goto fail; 6212105197Ssam } 6213105197Ssam result = m; 6214105197Ssam 6215105197Ssam /* create SA extension */ 6216105197Ssam m = key_setsadbsa(sav); 6217105197Ssam if (!m) { 6218105197Ssam error = ENOBUFS; 6219105197Ssam goto fail; 6220105197Ssam } 6221105197Ssam m_cat(result, m); 6222105197Ssam 6223105197Ssam /* create SA extension */ 6224105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 6225105197Ssam sav->replay ? sav->replay->count : 0, 6226105197Ssam sav->sah->saidx.reqid); 6227105197Ssam if (!m) { 6228105197Ssam error = ENOBUFS; 6229105197Ssam goto fail; 6230105197Ssam } 6231105197Ssam m_cat(result, m); 6232105197Ssam 6233105197Ssam /* create lifetime extension (current and soft) */ 6234105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6235105197Ssam m = key_alloc_mbuf(len); 6236105197Ssam if (!m || m->m_next) { /*XXX*/ 6237105197Ssam if (m) 6238105197Ssam m_freem(m); 6239105197Ssam error = ENOBUFS; 6240105197Ssam goto fail; 6241105197Ssam } 6242105197Ssam bzero(mtod(m, caddr_t), len); 6243105197Ssam lt = mtod(m, struct sadb_lifetime *); 6244105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6245105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6246105197Ssam lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6247105197Ssam lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6248105197Ssam lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime; 6249105197Ssam lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime; 6250105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6251105197Ssam bcopy(sav->lft_s, lt, sizeof(*lt)); 6252105197Ssam m_cat(result, m); 6253105197Ssam 6254105197Ssam /* set sadb_address for source */ 6255105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6256105197Ssam &sav->sah->saidx.src.sa, 6257105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6258105197Ssam if (!m) { 6259105197Ssam error = ENOBUFS; 6260105197Ssam goto fail; 6261105197Ssam } 6262105197Ssam m_cat(result, m); 6263105197Ssam 6264105197Ssam /* set sadb_address for destination */ 6265105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6266105197Ssam &sav->sah->saidx.dst.sa, 6267105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6268105197Ssam if (!m) { 6269105197Ssam error = ENOBUFS; 6270105197Ssam goto fail; 6271105197Ssam } 6272105197Ssam m_cat(result, m); 6273105197Ssam 6274105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 6275105197Ssam error = EINVAL; 6276105197Ssam goto fail; 6277105197Ssam } 6278105197Ssam 6279105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 6280105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 6281105197Ssam if (result == NULL) { 6282105197Ssam error = ENOBUFS; 6283105197Ssam goto fail; 6284105197Ssam } 6285105197Ssam } 6286105197Ssam 6287105197Ssam result->m_pkthdr.len = 0; 6288105197Ssam for (m = result; m; m = m->m_next) 6289105197Ssam result->m_pkthdr.len += m->m_len; 6290105197Ssam 6291105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 6292105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 6293105197Ssam 6294105197Ssam splx(s); 6295105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6296105197Ssam 6297105197Ssam fail: 6298105197Ssam if (result) 6299105197Ssam m_freem(result); 6300105197Ssam splx(s); 6301105197Ssam return error; 6302105197Ssam} 6303105197Ssam 6304105197Ssam/* 6305105197Ssam * SADB_FLUSH processing 6306105197Ssam * receive 6307105197Ssam * <base> 6308105197Ssam * from the ikmpd, and free all entries in secastree. 6309105197Ssam * and send, 6310105197Ssam * <base> 6311105197Ssam * to the ikmpd. 6312105197Ssam * NOTE: to do is only marking SADB_SASTATE_DEAD. 6313105197Ssam * 6314105197Ssam * m will always be freed. 6315105197Ssam */ 6316105197Ssamstatic int 6317105197Ssamkey_flush(so, m, mhp) 6318105197Ssam struct socket *so; 6319105197Ssam struct mbuf *m; 6320105197Ssam const struct sadb_msghdr *mhp; 6321105197Ssam{ 6322105197Ssam struct sadb_msg *newmsg; 6323105197Ssam struct secashead *sah, *nextsah; 6324105197Ssam struct secasvar *sav, *nextsav; 6325105197Ssam u_int16_t proto; 6326105197Ssam u_int8_t state; 6327105197Ssam u_int stateidx; 6328105197Ssam 6329120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6330120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6331120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6332105197Ssam 6333105197Ssam /* map satype to proto */ 6334105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6335120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6336120585Ssam __func__)); 6337105197Ssam return key_senderror(so, m, EINVAL); 6338105197Ssam } 6339105197Ssam 6340105197Ssam /* no SATYPE specified, i.e. flushing all SA. */ 6341120585Ssam SAHTREE_LOCK(); 6342105197Ssam for (sah = LIST_FIRST(&sahtree); 6343105197Ssam sah != NULL; 6344105197Ssam sah = nextsah) { 6345105197Ssam nextsah = LIST_NEXT(sah, chain); 6346105197Ssam 6347105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6348105197Ssam && proto != sah->saidx.proto) 6349105197Ssam continue; 6350105197Ssam 6351105197Ssam for (stateidx = 0; 6352105197Ssam stateidx < _ARRAYLEN(saorder_state_alive); 6353105197Ssam stateidx++) { 6354105197Ssam state = saorder_state_any[stateidx]; 6355105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 6356105197Ssam sav != NULL; 6357105197Ssam sav = nextsav) { 6358105197Ssam 6359105197Ssam nextsav = LIST_NEXT(sav, chain); 6360105197Ssam 6361105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 6362105197Ssam KEY_FREESAV(&sav); 6363105197Ssam } 6364105197Ssam } 6365105197Ssam 6366105197Ssam sah->state = SADB_SASTATE_DEAD; 6367105197Ssam } 6368120585Ssam SAHTREE_UNLOCK(); 6369105197Ssam 6370105197Ssam if (m->m_len < sizeof(struct sadb_msg) || 6371105197Ssam sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 6372120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6373105197Ssam return key_senderror(so, m, ENOBUFS); 6374105197Ssam } 6375105197Ssam 6376105197Ssam if (m->m_next) 6377105197Ssam m_freem(m->m_next); 6378105197Ssam m->m_next = NULL; 6379105197Ssam m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 6380105197Ssam newmsg = mtod(m, struct sadb_msg *); 6381105197Ssam newmsg->sadb_msg_errno = 0; 6382105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 6383105197Ssam 6384105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6385105197Ssam} 6386105197Ssam 6387105197Ssam/* 6388105197Ssam * SADB_DUMP processing 6389105197Ssam * dump all entries including status of DEAD in SAD. 6390105197Ssam * receive 6391105197Ssam * <base> 6392105197Ssam * from the ikmpd, and dump all secasvar leaves 6393105197Ssam * and send, 6394105197Ssam * <base> ..... 6395105197Ssam * to the ikmpd. 6396105197Ssam * 6397105197Ssam * m will always be freed. 6398105197Ssam */ 6399105197Ssamstatic int 6400105197Ssamkey_dump(so, m, mhp) 6401105197Ssam struct socket *so; 6402105197Ssam struct mbuf *m; 6403105197Ssam const struct sadb_msghdr *mhp; 6404105197Ssam{ 6405105197Ssam struct secashead *sah; 6406105197Ssam struct secasvar *sav; 6407105197Ssam u_int16_t proto; 6408105197Ssam u_int stateidx; 6409105197Ssam u_int8_t satype; 6410105197Ssam u_int8_t state; 6411105197Ssam int cnt; 6412105197Ssam struct sadb_msg *newmsg; 6413105197Ssam struct mbuf *n; 6414105197Ssam 6415120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6416120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6417120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6418120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6419105197Ssam 6420105197Ssam /* map satype to proto */ 6421105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6422120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6423120585Ssam __func__)); 6424105197Ssam return key_senderror(so, m, EINVAL); 6425105197Ssam } 6426105197Ssam 6427105197Ssam /* count sav entries to be sent to the userland. */ 6428105197Ssam cnt = 0; 6429120585Ssam SAHTREE_LOCK(); 6430105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 6431105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6432105197Ssam && proto != sah->saidx.proto) 6433105197Ssam continue; 6434105197Ssam 6435105197Ssam for (stateidx = 0; 6436105197Ssam stateidx < _ARRAYLEN(saorder_state_any); 6437105197Ssam stateidx++) { 6438105197Ssam state = saorder_state_any[stateidx]; 6439105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 6440105197Ssam cnt++; 6441105197Ssam } 6442105197Ssam } 6443105197Ssam } 6444105197Ssam 6445119643Ssam if (cnt == 0) { 6446120585Ssam SAHTREE_UNLOCK(); 6447105197Ssam return key_senderror(so, m, ENOENT); 6448119643Ssam } 6449105197Ssam 6450105197Ssam /* send this to the userland, one at a time. */ 6451105197Ssam newmsg = NULL; 6452105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 6453105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 6454105197Ssam && proto != sah->saidx.proto) 6455105197Ssam continue; 6456105197Ssam 6457105197Ssam /* map proto to satype */ 6458105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 6459120585Ssam SAHTREE_UNLOCK(); 6460120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 6461120585Ssam "SAD.\n", __func__)); 6462105197Ssam return key_senderror(so, m, EINVAL); 6463105197Ssam } 6464105197Ssam 6465105197Ssam for (stateidx = 0; 6466105197Ssam stateidx < _ARRAYLEN(saorder_state_any); 6467105197Ssam stateidx++) { 6468105197Ssam state = saorder_state_any[stateidx]; 6469105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 6470105197Ssam n = key_setdumpsa(sav, SADB_DUMP, satype, 6471105197Ssam --cnt, mhp->msg->sadb_msg_pid); 6472119643Ssam if (!n) { 6473120585Ssam SAHTREE_UNLOCK(); 6474105197Ssam return key_senderror(so, m, ENOBUFS); 6475119643Ssam } 6476105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 6477105197Ssam } 6478105197Ssam } 6479105197Ssam } 6480120585Ssam SAHTREE_UNLOCK(); 6481105197Ssam 6482105197Ssam m_freem(m); 6483105197Ssam return 0; 6484105197Ssam} 6485105197Ssam 6486105197Ssam/* 6487105197Ssam * SADB_X_PROMISC processing 6488105197Ssam * 6489105197Ssam * m will always be freed. 6490105197Ssam */ 6491105197Ssamstatic int 6492105197Ssamkey_promisc(so, m, mhp) 6493105197Ssam struct socket *so; 6494105197Ssam struct mbuf *m; 6495105197Ssam const struct sadb_msghdr *mhp; 6496105197Ssam{ 6497105197Ssam int olen; 6498105197Ssam 6499120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6500120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6501120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6502120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6503105197Ssam 6504105197Ssam olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6505105197Ssam 6506105197Ssam if (olen < sizeof(struct sadb_msg)) { 6507105197Ssam#if 1 6508105197Ssam return key_senderror(so, m, EINVAL); 6509105197Ssam#else 6510105197Ssam m_freem(m); 6511105197Ssam return 0; 6512105197Ssam#endif 6513105197Ssam } else if (olen == sizeof(struct sadb_msg)) { 6514105197Ssam /* enable/disable promisc mode */ 6515105197Ssam struct keycb *kp; 6516105197Ssam 6517105197Ssam if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 6518105197Ssam return key_senderror(so, m, EINVAL); 6519105197Ssam mhp->msg->sadb_msg_errno = 0; 6520105197Ssam switch (mhp->msg->sadb_msg_satype) { 6521105197Ssam case 0: 6522105197Ssam case 1: 6523105197Ssam kp->kp_promisc = mhp->msg->sadb_msg_satype; 6524105197Ssam break; 6525105197Ssam default: 6526105197Ssam return key_senderror(so, m, EINVAL); 6527105197Ssam } 6528105197Ssam 6529105197Ssam /* send the original message back to everyone */ 6530105197Ssam mhp->msg->sadb_msg_errno = 0; 6531105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6532105197Ssam } else { 6533105197Ssam /* send packet as is */ 6534105197Ssam 6535105197Ssam m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 6536105197Ssam 6537105197Ssam /* TODO: if sadb_msg_seq is specified, send to specific pid */ 6538105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 6539105197Ssam } 6540105197Ssam} 6541105197Ssam 6542105197Ssamstatic int (*key_typesw[]) __P((struct socket *, struct mbuf *, 6543105197Ssam const struct sadb_msghdr *)) = { 6544105197Ssam NULL, /* SADB_RESERVED */ 6545105197Ssam key_getspi, /* SADB_GETSPI */ 6546105197Ssam key_update, /* SADB_UPDATE */ 6547105197Ssam key_add, /* SADB_ADD */ 6548105197Ssam key_delete, /* SADB_DELETE */ 6549105197Ssam key_get, /* SADB_GET */ 6550105197Ssam key_acquire2, /* SADB_ACQUIRE */ 6551105197Ssam key_register, /* SADB_REGISTER */ 6552105197Ssam NULL, /* SADB_EXPIRE */ 6553105197Ssam key_flush, /* SADB_FLUSH */ 6554105197Ssam key_dump, /* SADB_DUMP */ 6555105197Ssam key_promisc, /* SADB_X_PROMISC */ 6556105197Ssam NULL, /* SADB_X_PCHANGE */ 6557105197Ssam key_spdadd, /* SADB_X_SPDUPDATE */ 6558105197Ssam key_spdadd, /* SADB_X_SPDADD */ 6559105197Ssam key_spddelete, /* SADB_X_SPDDELETE */ 6560105197Ssam key_spdget, /* SADB_X_SPDGET */ 6561105197Ssam NULL, /* SADB_X_SPDACQUIRE */ 6562105197Ssam key_spddump, /* SADB_X_SPDDUMP */ 6563105197Ssam key_spdflush, /* SADB_X_SPDFLUSH */ 6564105197Ssam key_spdadd, /* SADB_X_SPDSETIDX */ 6565105197Ssam NULL, /* SADB_X_SPDEXPIRE */ 6566105197Ssam key_spddelete2, /* SADB_X_SPDDELETE2 */ 6567105197Ssam}; 6568105197Ssam 6569105197Ssam/* 6570105197Ssam * parse sadb_msg buffer to process PFKEYv2, 6571105197Ssam * and create a data to response if needed. 6572105197Ssam * I think to be dealed with mbuf directly. 6573105197Ssam * IN: 6574105197Ssam * msgp : pointer to pointer to a received buffer pulluped. 6575105197Ssam * This is rewrited to response. 6576105197Ssam * so : pointer to socket. 6577105197Ssam * OUT: 6578105197Ssam * length for buffer to send to user process. 6579105197Ssam */ 6580105197Ssamint 6581105197Ssamkey_parse(m, so) 6582105197Ssam struct mbuf *m; 6583105197Ssam struct socket *so; 6584105197Ssam{ 6585105197Ssam struct sadb_msg *msg; 6586105197Ssam struct sadb_msghdr mh; 6587105197Ssam u_int orglen; 6588105197Ssam int error; 6589105197Ssam int target; 6590105197Ssam 6591120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6592120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6593105197Ssam 6594105197Ssam#if 0 /*kdebug_sadb assumes msg in linear buffer*/ 6595105197Ssam KEYDEBUG(KEYDEBUG_KEY_DUMP, 6596120585Ssam ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 6597105197Ssam kdebug_sadb(msg)); 6598105197Ssam#endif 6599105197Ssam 6600105197Ssam if (m->m_len < sizeof(struct sadb_msg)) { 6601105197Ssam m = m_pullup(m, sizeof(struct sadb_msg)); 6602105197Ssam if (!m) 6603105197Ssam return ENOBUFS; 6604105197Ssam } 6605105197Ssam msg = mtod(m, struct sadb_msg *); 6606105197Ssam orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 6607105197Ssam target = KEY_SENDUP_ONE; 6608105197Ssam 6609105197Ssam if ((m->m_flags & M_PKTHDR) == 0 || 6610105197Ssam m->m_pkthdr.len != m->m_pkthdr.len) { 6611120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 6612105197Ssam pfkeystat.out_invlen++; 6613105197Ssam error = EINVAL; 6614105197Ssam goto senderror; 6615105197Ssam } 6616105197Ssam 6617105197Ssam if (msg->sadb_msg_version != PF_KEY_V2) { 6618120585Ssam ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 6619120585Ssam __func__, msg->sadb_msg_version)); 6620105197Ssam pfkeystat.out_invver++; 6621105197Ssam error = EINVAL; 6622105197Ssam goto senderror; 6623105197Ssam } 6624105197Ssam 6625105197Ssam if (msg->sadb_msg_type > SADB_MAX) { 6626120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 6627120585Ssam __func__, msg->sadb_msg_type)); 6628105197Ssam pfkeystat.out_invmsgtype++; 6629105197Ssam error = EINVAL; 6630105197Ssam goto senderror; 6631105197Ssam } 6632105197Ssam 6633105197Ssam /* for old-fashioned code - should be nuked */ 6634105197Ssam if (m->m_pkthdr.len > MCLBYTES) { 6635105197Ssam m_freem(m); 6636105197Ssam return ENOBUFS; 6637105197Ssam } 6638105197Ssam if (m->m_next) { 6639105197Ssam struct mbuf *n; 6640105197Ssam 6641111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6642105197Ssam if (n && m->m_pkthdr.len > MHLEN) { 6643111119Simp MCLGET(n, M_DONTWAIT); 6644105197Ssam if ((n->m_flags & M_EXT) == 0) { 6645105197Ssam m_free(n); 6646105197Ssam n = NULL; 6647105197Ssam } 6648105197Ssam } 6649105197Ssam if (!n) { 6650105197Ssam m_freem(m); 6651105197Ssam return ENOBUFS; 6652105197Ssam } 6653105197Ssam m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 6654105197Ssam n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 6655105197Ssam n->m_next = NULL; 6656105197Ssam m_freem(m); 6657105197Ssam m = n; 6658105197Ssam } 6659105197Ssam 6660105197Ssam /* align the mbuf chain so that extensions are in contiguous region. */ 6661105197Ssam error = key_align(m, &mh); 6662105197Ssam if (error) 6663105197Ssam return error; 6664105197Ssam 6665105197Ssam if (m->m_next) { /*XXX*/ 6666105197Ssam m_freem(m); 6667105197Ssam return ENOBUFS; 6668105197Ssam } 6669105197Ssam 6670105197Ssam msg = mh.msg; 6671105197Ssam 6672105197Ssam /* check SA type */ 6673105197Ssam switch (msg->sadb_msg_satype) { 6674105197Ssam case SADB_SATYPE_UNSPEC: 6675105197Ssam switch (msg->sadb_msg_type) { 6676105197Ssam case SADB_GETSPI: 6677105197Ssam case SADB_UPDATE: 6678105197Ssam case SADB_ADD: 6679105197Ssam case SADB_DELETE: 6680105197Ssam case SADB_GET: 6681105197Ssam case SADB_ACQUIRE: 6682105197Ssam case SADB_EXPIRE: 6683120585Ssam ipseclog((LOG_DEBUG, "%s: must specify satype " 6684120585Ssam "when msg type=%u.\n", __func__, 6685120585Ssam msg->sadb_msg_type)); 6686105197Ssam pfkeystat.out_invsatype++; 6687105197Ssam error = EINVAL; 6688105197Ssam goto senderror; 6689105197Ssam } 6690105197Ssam break; 6691105197Ssam case SADB_SATYPE_AH: 6692105197Ssam case SADB_SATYPE_ESP: 6693105197Ssam case SADB_X_SATYPE_IPCOMP: 6694125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 6695105197Ssam switch (msg->sadb_msg_type) { 6696105197Ssam case SADB_X_SPDADD: 6697105197Ssam case SADB_X_SPDDELETE: 6698105197Ssam case SADB_X_SPDGET: 6699105197Ssam case SADB_X_SPDDUMP: 6700105197Ssam case SADB_X_SPDFLUSH: 6701105197Ssam case SADB_X_SPDSETIDX: 6702105197Ssam case SADB_X_SPDUPDATE: 6703105197Ssam case SADB_X_SPDDELETE2: 6704120585Ssam ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 6705120585Ssam __func__, msg->sadb_msg_type)); 6706105197Ssam pfkeystat.out_invsatype++; 6707105197Ssam error = EINVAL; 6708105197Ssam goto senderror; 6709105197Ssam } 6710105197Ssam break; 6711105197Ssam case SADB_SATYPE_RSVP: 6712105197Ssam case SADB_SATYPE_OSPFV2: 6713105197Ssam case SADB_SATYPE_RIPV2: 6714105197Ssam case SADB_SATYPE_MIP: 6715120585Ssam ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 6716120585Ssam __func__, msg->sadb_msg_satype)); 6717105197Ssam pfkeystat.out_invsatype++; 6718105197Ssam error = EOPNOTSUPP; 6719105197Ssam goto senderror; 6720105197Ssam case 1: /* XXX: What does it do? */ 6721105197Ssam if (msg->sadb_msg_type == SADB_X_PROMISC) 6722105197Ssam break; 6723105197Ssam /*FALLTHROUGH*/ 6724105197Ssam default: 6725120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 6726120585Ssam __func__, msg->sadb_msg_satype)); 6727105197Ssam pfkeystat.out_invsatype++; 6728105197Ssam error = EINVAL; 6729105197Ssam goto senderror; 6730105197Ssam } 6731105197Ssam 6732105197Ssam /* check field of upper layer protocol and address family */ 6733105197Ssam if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 6734105197Ssam && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 6735105197Ssam struct sadb_address *src0, *dst0; 6736105197Ssam u_int plen; 6737105197Ssam 6738105197Ssam src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 6739105197Ssam dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 6740105197Ssam 6741105197Ssam /* check upper layer protocol */ 6742105197Ssam if (src0->sadb_address_proto != dst0->sadb_address_proto) { 6743120585Ssam ipseclog((LOG_DEBUG, "%s: upper layer protocol " 6744120585Ssam "mismatched.\n", __func__)); 6745105197Ssam pfkeystat.out_invaddr++; 6746105197Ssam error = EINVAL; 6747105197Ssam goto senderror; 6748105197Ssam } 6749105197Ssam 6750105197Ssam /* check family */ 6751105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_family != 6752105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_family) { 6753120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 6754120585Ssam __func__)); 6755105197Ssam pfkeystat.out_invaddr++; 6756105197Ssam error = EINVAL; 6757105197Ssam goto senderror; 6758105197Ssam } 6759105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6760105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_len) { 6761120585Ssam ipseclog((LOG_DEBUG, "%s: address struct size " 6762120585Ssam "mismatched.\n", __func__)); 6763105197Ssam pfkeystat.out_invaddr++; 6764105197Ssam error = EINVAL; 6765105197Ssam goto senderror; 6766105197Ssam } 6767105197Ssam 6768105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 6769105197Ssam case AF_INET: 6770105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6771105197Ssam sizeof(struct sockaddr_in)) { 6772105197Ssam pfkeystat.out_invaddr++; 6773105197Ssam error = EINVAL; 6774105197Ssam goto senderror; 6775105197Ssam } 6776105197Ssam break; 6777105197Ssam case AF_INET6: 6778105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 6779105197Ssam sizeof(struct sockaddr_in6)) { 6780105197Ssam pfkeystat.out_invaddr++; 6781105197Ssam error = EINVAL; 6782105197Ssam goto senderror; 6783105197Ssam } 6784105197Ssam break; 6785105197Ssam default: 6786120585Ssam ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 6787120585Ssam __func__)); 6788105197Ssam pfkeystat.out_invaddr++; 6789105197Ssam error = EAFNOSUPPORT; 6790105197Ssam goto senderror; 6791105197Ssam } 6792105197Ssam 6793105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 6794105197Ssam case AF_INET: 6795105197Ssam plen = sizeof(struct in_addr) << 3; 6796105197Ssam break; 6797105197Ssam case AF_INET6: 6798105197Ssam plen = sizeof(struct in6_addr) << 3; 6799105197Ssam break; 6800105197Ssam default: 6801105197Ssam plen = 0; /*fool gcc*/ 6802105197Ssam break; 6803105197Ssam } 6804105197Ssam 6805105197Ssam /* check max prefix length */ 6806105197Ssam if (src0->sadb_address_prefixlen > plen || 6807105197Ssam dst0->sadb_address_prefixlen > plen) { 6808120585Ssam ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n", 6809120585Ssam __func__)); 6810105197Ssam pfkeystat.out_invaddr++; 6811105197Ssam error = EINVAL; 6812105197Ssam goto senderror; 6813105197Ssam } 6814105197Ssam 6815105197Ssam /* 6816105197Ssam * prefixlen == 0 is valid because there can be a case when 6817105197Ssam * all addresses are matched. 6818105197Ssam */ 6819105197Ssam } 6820105197Ssam 6821105197Ssam if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 6822105197Ssam key_typesw[msg->sadb_msg_type] == NULL) { 6823105197Ssam pfkeystat.out_invmsgtype++; 6824105197Ssam error = EINVAL; 6825105197Ssam goto senderror; 6826105197Ssam } 6827105197Ssam 6828105197Ssam return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 6829105197Ssam 6830105197Ssamsenderror: 6831105197Ssam msg->sadb_msg_errno = error; 6832105197Ssam return key_sendup_mbuf(so, m, target); 6833105197Ssam} 6834105197Ssam 6835105197Ssamstatic int 6836105197Ssamkey_senderror(so, m, code) 6837105197Ssam struct socket *so; 6838105197Ssam struct mbuf *m; 6839105197Ssam int code; 6840105197Ssam{ 6841105197Ssam struct sadb_msg *msg; 6842105197Ssam 6843120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 6844120585Ssam ("mbuf too small, len %u", m->m_len)); 6845105197Ssam 6846105197Ssam msg = mtod(m, struct sadb_msg *); 6847105197Ssam msg->sadb_msg_errno = code; 6848105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 6849105197Ssam} 6850105197Ssam 6851105197Ssam/* 6852105197Ssam * set the pointer to each header into message buffer. 6853105197Ssam * m will be freed on error. 6854105197Ssam * XXX larger-than-MCLBYTES extension? 6855105197Ssam */ 6856105197Ssamstatic int 6857105197Ssamkey_align(m, mhp) 6858105197Ssam struct mbuf *m; 6859105197Ssam struct sadb_msghdr *mhp; 6860105197Ssam{ 6861105197Ssam struct mbuf *n; 6862105197Ssam struct sadb_ext *ext; 6863105197Ssam size_t off, end; 6864105197Ssam int extlen; 6865105197Ssam int toff; 6866105197Ssam 6867120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6868120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6869120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 6870120585Ssam ("mbuf too small, len %u", m->m_len)); 6871105197Ssam 6872105197Ssam /* initialize */ 6873105197Ssam bzero(mhp, sizeof(*mhp)); 6874105197Ssam 6875105197Ssam mhp->msg = mtod(m, struct sadb_msg *); 6876105197Ssam mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 6877105197Ssam 6878105197Ssam end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 6879105197Ssam extlen = end; /*just in case extlen is not updated*/ 6880105197Ssam for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 6881105197Ssam n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 6882105197Ssam if (!n) { 6883105197Ssam /* m is already freed */ 6884105197Ssam return ENOBUFS; 6885105197Ssam } 6886105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 6887105197Ssam 6888105197Ssam /* set pointer */ 6889105197Ssam switch (ext->sadb_ext_type) { 6890105197Ssam case SADB_EXT_SA: 6891105197Ssam case SADB_EXT_ADDRESS_SRC: 6892105197Ssam case SADB_EXT_ADDRESS_DST: 6893105197Ssam case SADB_EXT_ADDRESS_PROXY: 6894105197Ssam case SADB_EXT_LIFETIME_CURRENT: 6895105197Ssam case SADB_EXT_LIFETIME_HARD: 6896105197Ssam case SADB_EXT_LIFETIME_SOFT: 6897105197Ssam case SADB_EXT_KEY_AUTH: 6898105197Ssam case SADB_EXT_KEY_ENCRYPT: 6899105197Ssam case SADB_EXT_IDENTITY_SRC: 6900105197Ssam case SADB_EXT_IDENTITY_DST: 6901105197Ssam case SADB_EXT_SENSITIVITY: 6902105197Ssam case SADB_EXT_PROPOSAL: 6903105197Ssam case SADB_EXT_SUPPORTED_AUTH: 6904105197Ssam case SADB_EXT_SUPPORTED_ENCRYPT: 6905105197Ssam case SADB_EXT_SPIRANGE: 6906105197Ssam case SADB_X_EXT_POLICY: 6907105197Ssam case SADB_X_EXT_SA2: 6908105197Ssam /* duplicate check */ 6909105197Ssam /* 6910105197Ssam * XXX Are there duplication payloads of either 6911105197Ssam * KEY_AUTH or KEY_ENCRYPT ? 6912105197Ssam */ 6913105197Ssam if (mhp->ext[ext->sadb_ext_type] != NULL) { 6914120585Ssam ipseclog((LOG_DEBUG, "%s: duplicate ext_type " 6915120585Ssam "%u\n", __func__, ext->sadb_ext_type)); 6916105197Ssam m_freem(m); 6917105197Ssam pfkeystat.out_dupext++; 6918105197Ssam return EINVAL; 6919105197Ssam } 6920105197Ssam break; 6921105197Ssam default: 6922120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 6923120585Ssam __func__, ext->sadb_ext_type)); 6924105197Ssam m_freem(m); 6925105197Ssam pfkeystat.out_invexttype++; 6926105197Ssam return EINVAL; 6927105197Ssam } 6928105197Ssam 6929105197Ssam extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 6930105197Ssam 6931105197Ssam if (key_validate_ext(ext, extlen)) { 6932105197Ssam m_freem(m); 6933105197Ssam pfkeystat.out_invlen++; 6934105197Ssam return EINVAL; 6935105197Ssam } 6936105197Ssam 6937105197Ssam n = m_pulldown(m, off, extlen, &toff); 6938105197Ssam if (!n) { 6939105197Ssam /* m is already freed */ 6940105197Ssam return ENOBUFS; 6941105197Ssam } 6942105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 6943105197Ssam 6944105197Ssam mhp->ext[ext->sadb_ext_type] = ext; 6945105197Ssam mhp->extoff[ext->sadb_ext_type] = off; 6946105197Ssam mhp->extlen[ext->sadb_ext_type] = extlen; 6947105197Ssam } 6948105197Ssam 6949105197Ssam if (off != end) { 6950105197Ssam m_freem(m); 6951105197Ssam pfkeystat.out_invlen++; 6952105197Ssam return EINVAL; 6953105197Ssam } 6954105197Ssam 6955105197Ssam return 0; 6956105197Ssam} 6957105197Ssam 6958105197Ssamstatic int 6959105197Ssamkey_validate_ext(ext, len) 6960105197Ssam const struct sadb_ext *ext; 6961105197Ssam int len; 6962105197Ssam{ 6963105197Ssam const struct sockaddr *sa; 6964105197Ssam enum { NONE, ADDR } checktype = NONE; 6965105197Ssam int baselen = 0; 6966105197Ssam const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 6967105197Ssam 6968105197Ssam if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 6969105197Ssam return EINVAL; 6970105197Ssam 6971105197Ssam /* if it does not match minimum/maximum length, bail */ 6972105197Ssam if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 6973105197Ssam ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 6974105197Ssam return EINVAL; 6975105197Ssam if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 6976105197Ssam return EINVAL; 6977105197Ssam if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 6978105197Ssam return EINVAL; 6979105197Ssam 6980105197Ssam /* more checks based on sadb_ext_type XXX need more */ 6981105197Ssam switch (ext->sadb_ext_type) { 6982105197Ssam case SADB_EXT_ADDRESS_SRC: 6983105197Ssam case SADB_EXT_ADDRESS_DST: 6984105197Ssam case SADB_EXT_ADDRESS_PROXY: 6985105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 6986105197Ssam checktype = ADDR; 6987105197Ssam break; 6988105197Ssam case SADB_EXT_IDENTITY_SRC: 6989105197Ssam case SADB_EXT_IDENTITY_DST: 6990105197Ssam if (((const struct sadb_ident *)ext)->sadb_ident_type == 6991105197Ssam SADB_X_IDENTTYPE_ADDR) { 6992105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 6993105197Ssam checktype = ADDR; 6994105197Ssam } else 6995105197Ssam checktype = NONE; 6996105197Ssam break; 6997105197Ssam default: 6998105197Ssam checktype = NONE; 6999105197Ssam break; 7000105197Ssam } 7001105197Ssam 7002105197Ssam switch (checktype) { 7003105197Ssam case NONE: 7004105197Ssam break; 7005105197Ssam case ADDR: 7006105197Ssam sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7007105197Ssam if (len < baselen + sal) 7008105197Ssam return EINVAL; 7009105197Ssam if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7010105197Ssam return EINVAL; 7011105197Ssam break; 7012105197Ssam } 7013105197Ssam 7014105197Ssam return 0; 7015105197Ssam} 7016105197Ssam 7017105197Ssamvoid 7018105197Ssamkey_init() 7019105197Ssam{ 7020105197Ssam int i; 7021105197Ssam 7022120585Ssam SPTREE_LOCK_INIT(); 7023120585Ssam REGTREE_LOCK_INIT(); 7024120585Ssam SAHTREE_LOCK_INIT(); 7025120585Ssam ACQ_LOCK_INIT(); 7026120585Ssam SPACQ_LOCK_INIT(); 7027119643Ssam 7028119643Ssam for (i = 0; i < IPSEC_DIR_MAX; i++) 7029105197Ssam LIST_INIT(&sptree[i]); 7030105197Ssam 7031105197Ssam LIST_INIT(&sahtree); 7032105197Ssam 7033119643Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) 7034105197Ssam LIST_INIT(®tree[i]); 7035105197Ssam 7036105197Ssam LIST_INIT(&acqtree); 7037105197Ssam LIST_INIT(&spacqtree); 7038105197Ssam 7039105197Ssam /* system default */ 7040105197Ssam ip4_def_policy.policy = IPSEC_POLICY_NONE; 7041105197Ssam ip4_def_policy.refcnt++; /*never reclaim this*/ 7042105197Ssam 7043105197Ssam#ifndef IPSEC_DEBUG2 7044105197Ssam timeout((void *)key_timehandler, (void *)0, hz); 7045105197Ssam#endif /*IPSEC_DEBUG2*/ 7046105197Ssam 7047105197Ssam /* initialize key statistics */ 7048105197Ssam keystat.getspi_count = 1; 7049105197Ssam 7050120585Ssam printf("Fast IPsec: Initialized Security Association Processing.\n"); 7051105197Ssam 7052105197Ssam return; 7053105197Ssam} 7054105197Ssam 7055105197Ssam/* 7056105197Ssam * XXX: maybe This function is called after INBOUND IPsec processing. 7057105197Ssam * 7058105197Ssam * Special check for tunnel-mode packets. 7059105197Ssam * We must make some checks for consistency between inner and outer IP header. 7060105197Ssam * 7061105197Ssam * xxx more checks to be provided 7062105197Ssam */ 7063105197Ssamint 7064105197Ssamkey_checktunnelsanity(sav, family, src, dst) 7065105197Ssam struct secasvar *sav; 7066105197Ssam u_int family; 7067105197Ssam caddr_t src; 7068105197Ssam caddr_t dst; 7069105197Ssam{ 7070120585Ssam IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7071105197Ssam 7072105197Ssam /* XXX: check inner IP header */ 7073105197Ssam 7074105197Ssam return 1; 7075105197Ssam} 7076105197Ssam 7077105197Ssam/* record data transfer on SA, and update timestamps */ 7078105197Ssamvoid 7079105197Ssamkey_sa_recordxfer(sav, m) 7080105197Ssam struct secasvar *sav; 7081105197Ssam struct mbuf *m; 7082105197Ssam{ 7083120585Ssam IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7084120585Ssam IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7085105197Ssam if (!sav->lft_c) 7086105197Ssam return; 7087105197Ssam 7088105197Ssam /* 7089105197Ssam * XXX Currently, there is a difference of bytes size 7090105197Ssam * between inbound and outbound processing. 7091105197Ssam */ 7092105197Ssam sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7093105197Ssam /* to check bytes lifetime is done in key_timehandler(). */ 7094105197Ssam 7095105197Ssam /* 7096105197Ssam * We use the number of packets as the unit of 7097105197Ssam * sadb_lifetime_allocations. We increment the variable 7098105197Ssam * whenever {esp,ah}_{in,out}put is called. 7099105197Ssam */ 7100105197Ssam sav->lft_c->sadb_lifetime_allocations++; 7101105197Ssam /* XXX check for expires? */ 7102105197Ssam 7103105197Ssam /* 7104105197Ssam * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7105105197Ssam * in seconds. HARD and SOFT lifetime are measured by the time 7106105197Ssam * difference (again in seconds) from sadb_lifetime_usetime. 7107105197Ssam * 7108105197Ssam * usetime 7109105197Ssam * v expire expire 7110105197Ssam * -----+-----+--------+---> t 7111105197Ssam * <--------------> HARD 7112105197Ssam * <-----> SOFT 7113105197Ssam */ 7114105197Ssam sav->lft_c->sadb_lifetime_usetime = time_second; 7115105197Ssam /* XXX check for expires? */ 7116105197Ssam 7117105197Ssam return; 7118105197Ssam} 7119105197Ssam 7120105197Ssam/* dumb version */ 7121105197Ssamvoid 7122105197Ssamkey_sa_routechange(dst) 7123105197Ssam struct sockaddr *dst; 7124105197Ssam{ 7125105197Ssam struct secashead *sah; 7126105197Ssam struct route *ro; 7127105197Ssam 7128120585Ssam SAHTREE_LOCK(); 7129105197Ssam LIST_FOREACH(sah, &sahtree, chain) { 7130105197Ssam ro = &sah->sa_route; 7131105197Ssam if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7132105197Ssam && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7133105197Ssam RTFREE(ro->ro_rt); 7134105197Ssam ro->ro_rt = (struct rtentry *)NULL; 7135105197Ssam } 7136105197Ssam } 7137120585Ssam SAHTREE_UNLOCK(); 7138105197Ssam} 7139105197Ssam 7140105197Ssamstatic void 7141105197Ssamkey_sa_chgstate(sav, state) 7142105197Ssam struct secasvar *sav; 7143105197Ssam u_int8_t state; 7144105197Ssam{ 7145120585Ssam IPSEC_ASSERT(sav != NULL, ("NULL sav")); 7146120585Ssam SAHTREE_LOCK_ASSERT(); 7147105197Ssam 7148119643Ssam if (sav->state != state) { 7149119643Ssam if (__LIST_CHAINED(sav)) 7150119643Ssam LIST_REMOVE(sav, chain); 7151119643Ssam sav->state = state; 7152119643Ssam LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7153119643Ssam } 7154105197Ssam} 7155105197Ssam 7156105197Ssamvoid 7157105197Ssamkey_sa_stir_iv(sav) 7158105197Ssam struct secasvar *sav; 7159105197Ssam{ 7160105197Ssam 7161120585Ssam IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 7162105197Ssam key_randomfill(sav->iv, sav->ivlen); 7163105197Ssam} 7164105197Ssam 7165105197Ssam/* XXX too much? */ 7166105197Ssamstatic struct mbuf * 7167105197Ssamkey_alloc_mbuf(l) 7168105197Ssam int l; 7169105197Ssam{ 7170105197Ssam struct mbuf *m = NULL, *n; 7171105197Ssam int len, t; 7172105197Ssam 7173105197Ssam len = l; 7174105197Ssam while (len > 0) { 7175111119Simp MGET(n, M_DONTWAIT, MT_DATA); 7176105197Ssam if (n && len > MLEN) 7177111119Simp MCLGET(n, M_DONTWAIT); 7178105197Ssam if (!n) { 7179105197Ssam m_freem(m); 7180105197Ssam return NULL; 7181105197Ssam } 7182105197Ssam 7183105197Ssam n->m_next = NULL; 7184105197Ssam n->m_len = 0; 7185105197Ssam n->m_len = M_TRAILINGSPACE(n); 7186105197Ssam /* use the bottom of mbuf, hoping we can prepend afterwards */ 7187105197Ssam if (n->m_len > len) { 7188105197Ssam t = (n->m_len - len) & ~(sizeof(long) - 1); 7189105197Ssam n->m_data += t; 7190105197Ssam n->m_len = len; 7191105197Ssam } 7192105197Ssam 7193105197Ssam len -= n->m_len; 7194105197Ssam 7195105197Ssam if (m) 7196105197Ssam m_cat(m, n); 7197105197Ssam else 7198105197Ssam m = n; 7199105197Ssam } 7200105197Ssam 7201105197Ssam return m; 7202105197Ssam} 7203