key.c revision 207651
1105197Ssam/* $FreeBSD: head/sys/netipsec/key.c 207651 2010-05-05 08:55:26Z vanhu $ */ 2105197Ssam/* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 3105197Ssam 4139823Simp/*- 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> 57158767Spjd#include <sys/refcount.h> 58105197Ssam#include <sys/syslog.h> 59105197Ssam 60105197Ssam#include <net/if.h> 61105197Ssam#include <net/route.h> 62105197Ssam#include <net/raw_cb.h> 63195699Srwatson#include <net/vnet.h> 64105197Ssam 65105197Ssam#include <netinet/in.h> 66105197Ssam#include <netinet/in_systm.h> 67105197Ssam#include <netinet/ip.h> 68105197Ssam#include <netinet/in_var.h> 69105197Ssam 70105197Ssam#ifdef INET6 71105197Ssam#include <netinet/ip6.h> 72105197Ssam#include <netinet6/in6_var.h> 73105197Ssam#include <netinet6/ip6_var.h> 74105197Ssam#endif /* INET6 */ 75105197Ssam 76105197Ssam#ifdef INET 77105197Ssam#include <netinet/in_pcb.h> 78105197Ssam#endif 79105197Ssam#ifdef INET6 80105197Ssam#include <netinet6/in6_pcb.h> 81105197Ssam#endif /* INET6 */ 82105197Ssam 83105197Ssam#include <net/pfkeyv2.h> 84105197Ssam#include <netipsec/keydb.h> 85105197Ssam#include <netipsec/key.h> 86105197Ssam#include <netipsec/keysock.h> 87105197Ssam#include <netipsec/key_debug.h> 88105197Ssam 89105197Ssam#include <netipsec/ipsec.h> 90105197Ssam#ifdef INET6 91105197Ssam#include <netipsec/ipsec6.h> 92105197Ssam#endif 93105197Ssam 94105197Ssam#include <netipsec/xform.h> 95105197Ssam 96105197Ssam#include <machine/stdarg.h> 97105197Ssam 98105197Ssam/* randomness */ 99105197Ssam#include <sys/random.h> 100105197Ssam 101105197Ssam#define FULLMASK 0xff 102105197Ssam#define _BITS(bytes) ((bytes) << 3) 103105197Ssam 104105197Ssam/* 105105197Ssam * Note on SA reference counting: 106105197Ssam * - SAs that are not in DEAD state will have (total external reference + 1) 107105197Ssam * following value in reference count field. they cannot be freed and are 108105197Ssam * referenced from SA header. 109105197Ssam * - SAs that are in DEAD state will have (total external reference) 110105197Ssam * in reference count field. they are ready to be freed. reference from 111105197Ssam * SA header will be removed in key_delsav(), when the reference count 112105197Ssam * field hits 0 (= no external reference other than from SA header. 113105197Ssam */ 114105197Ssam 115195699SrwatsonVNET_DEFINE(u_int32_t, key_debug_level) = 0; 116195699Srwatsonstatic VNET_DEFINE(u_int, key_spi_trycnt) = 1000; 117195699Srwatsonstatic VNET_DEFINE(u_int32_t, key_spi_minval) = 0x100; 118195699Srwatsonstatic VNET_DEFINE(u_int32_t, key_spi_maxval) = 0x0fffffff; /* XXX */ 119195699Srwatsonstatic VNET_DEFINE(u_int32_t, policy_id) = 0; 120195699Srwatson/*interval to initialize randseed,1(m)*/ 121195699Srwatsonstatic VNET_DEFINE(u_int, key_int_random) = 60; 122195699Srwatson/* interval to expire acquiring, 30(s)*/ 123195699Srwatsonstatic VNET_DEFINE(u_int, key_larval_lifetime) = 30; 124195699Srwatson/* counter for blocking SADB_ACQUIRE.*/ 125195699Srwatsonstatic VNET_DEFINE(int, key_blockacq_count) = 10; 126195699Srwatson/* lifetime for blocking SADB_ACQUIRE.*/ 127195699Srwatsonstatic VNET_DEFINE(int, key_blockacq_lifetime) = 20; 128195699Srwatson/* preferred old sa rather than new sa.*/ 129195699Srwatsonstatic VNET_DEFINE(int, key_preferred_oldsa) = 1; 130207369Sbz#define V_key_spi_trycnt VNET(key_spi_trycnt) 131207369Sbz#define V_key_spi_minval VNET(key_spi_minval) 132207369Sbz#define V_key_spi_maxval VNET(key_spi_maxval) 133207369Sbz#define V_policy_id VNET(policy_id) 134207369Sbz#define V_key_int_random VNET(key_int_random) 135207369Sbz#define V_key_larval_lifetime VNET(key_larval_lifetime) 136207369Sbz#define V_key_blockacq_count VNET(key_blockacq_count) 137207369Sbz#define V_key_blockacq_lifetime VNET(key_blockacq_lifetime) 138195727Srwatson#define V_key_preferred_oldsa VNET(key_preferred_oldsa) 139105197Ssam 140195699Srwatsonstatic VNET_DEFINE(u_int32_t, acq_seq) = 0; 141195727Srwatson#define V_acq_seq VNET(acq_seq) 142105197Ssam 143195699Srwatson /* SPD */ 144195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(_sptree, secpolicy), sptree[IPSEC_DIR_MAX]); 145195727Srwatson#define V_sptree VNET(sptree) 146119643Ssamstatic struct mtx sptree_lock; 147120585Ssam#define SPTREE_LOCK_INIT() \ 148120585Ssam mtx_init(&sptree_lock, "sptree", \ 149120585Ssam "fast ipsec security policy database", MTX_DEF) 150120585Ssam#define SPTREE_LOCK_DESTROY() mtx_destroy(&sptree_lock) 151120585Ssam#define SPTREE_LOCK() mtx_lock(&sptree_lock) 152120585Ssam#define SPTREE_UNLOCK() mtx_unlock(&sptree_lock) 153120585Ssam#define SPTREE_LOCK_ASSERT() mtx_assert(&sptree_lock, MA_OWNED) 154120585Ssam 155195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(_sahtree, secashead), sahtree); /* SAD */ 156195727Srwatson#define V_sahtree VNET(sahtree) 157119643Ssamstatic struct mtx sahtree_lock; 158120585Ssam#define SAHTREE_LOCK_INIT() \ 159120585Ssam mtx_init(&sahtree_lock, "sahtree", \ 160120585Ssam "fast ipsec security association database", MTX_DEF) 161120585Ssam#define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock) 162120585Ssam#define SAHTREE_LOCK() mtx_lock(&sahtree_lock) 163120585Ssam#define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock) 164120585Ssam#define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED) 165120585Ssam 166119643Ssam /* registed list */ 167195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(_regtree, secreg), regtree[SADB_SATYPE_MAX + 1]); 168195727Srwatson#define V_regtree VNET(regtree) 169119643Ssamstatic struct mtx regtree_lock; 170120585Ssam#define REGTREE_LOCK_INIT() \ 171120585Ssam mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF) 172120585Ssam#define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock) 173120585Ssam#define REGTREE_LOCK() mtx_lock(®tree_lock) 174120585Ssam#define REGTREE_UNLOCK() mtx_unlock(®tree_lock) 175120585Ssam#define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED) 176120585Ssam 177195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(_acqtree, secacq), acqtree); /* acquiring list */ 178195727Srwatson#define V_acqtree VNET(acqtree) 179119643Ssamstatic struct mtx acq_lock; 180120585Ssam#define ACQ_LOCK_INIT() \ 181120585Ssam mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF) 182120585Ssam#define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock) 183120585Ssam#define ACQ_LOCK() mtx_lock(&acq_lock) 184120585Ssam#define ACQ_UNLOCK() mtx_unlock(&acq_lock) 185120585Ssam#define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED) 186120585Ssam 187195699Srwatson /* SP acquiring list */ 188195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(_spacqtree, secspacq), spacqtree); 189195727Srwatson#define V_spacqtree VNET(spacqtree) 190119643Ssamstatic struct mtx spacq_lock; 191120585Ssam#define SPACQ_LOCK_INIT() \ 192120585Ssam mtx_init(&spacq_lock, "spacqtree", \ 193120585Ssam "fast ipsec security policy acquire list", MTX_DEF) 194120585Ssam#define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock) 195120585Ssam#define SPACQ_LOCK() mtx_lock(&spacq_lock) 196120585Ssam#define SPACQ_UNLOCK() mtx_unlock(&spacq_lock) 197120585Ssam#define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED) 198105197Ssam 199105197Ssam/* search order for SAs */ 200128856Ssamstatic const u_int saorder_state_valid_prefer_old[] = { 201105197Ssam SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 202105197Ssam}; 203128856Ssamstatic const u_int saorder_state_valid_prefer_new[] = { 204128856Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 205128856Ssam}; 206185348Szecstatic const u_int saorder_state_alive[] = { 207105197Ssam /* except DEAD */ 208105197Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 209105197Ssam}; 210185348Szecstatic const u_int saorder_state_any[] = { 211105197Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 212105197Ssam SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 213105197Ssam}; 214105197Ssam 215105197Ssamstatic const int minsize[] = { 216105197Ssam sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 217105197Ssam sizeof(struct sadb_sa), /* SADB_EXT_SA */ 218105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 219105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 220105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 221105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 222105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 223105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 224105197Ssam sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 225105197Ssam sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 226105197Ssam sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 227105197Ssam sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 228105197Ssam sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 229105197Ssam sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 230105197Ssam sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 231105197Ssam sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 232105197Ssam sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 233105197Ssam 0, /* SADB_X_EXT_KMPRIVATE */ 234105197Ssam sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 235105197Ssam sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 236194062Svanhu sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */ 237194062Svanhu sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */ 238194062Svanhu sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */ 239194062Svanhu sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 240194062Svanhu sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 241194062Svanhu sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ 242105197Ssam}; 243105197Ssamstatic const int maxsize[] = { 244105197Ssam sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 245105197Ssam sizeof(struct sadb_sa), /* SADB_EXT_SA */ 246105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 247105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 248105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 249105197Ssam 0, /* SADB_EXT_ADDRESS_SRC */ 250105197Ssam 0, /* SADB_EXT_ADDRESS_DST */ 251105197Ssam 0, /* SADB_EXT_ADDRESS_PROXY */ 252105197Ssam 0, /* SADB_EXT_KEY_AUTH */ 253105197Ssam 0, /* SADB_EXT_KEY_ENCRYPT */ 254105197Ssam 0, /* SADB_EXT_IDENTITY_SRC */ 255105197Ssam 0, /* SADB_EXT_IDENTITY_DST */ 256105197Ssam 0, /* SADB_EXT_SENSITIVITY */ 257105197Ssam 0, /* SADB_EXT_PROPOSAL */ 258105197Ssam 0, /* SADB_EXT_SUPPORTED_AUTH */ 259105197Ssam 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 260105197Ssam sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 261105197Ssam 0, /* SADB_X_EXT_KMPRIVATE */ 262105197Ssam 0, /* SADB_X_EXT_POLICY */ 263105197Ssam sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 264194062Svanhu sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */ 265194062Svanhu sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */ 266194062Svanhu sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */ 267194062Svanhu 0, /* SADB_X_EXT_NAT_T_OAI */ 268194062Svanhu 0, /* SADB_X_EXT_NAT_T_OAR */ 269194062Svanhu sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ 270105197Ssam}; 271105197Ssam 272195699Srwatsonstatic VNET_DEFINE(int, ipsec_esp_keymin) = 256; 273207369Sbzstatic VNET_DEFINE(int, ipsec_esp_auth) = 0; 274207369Sbzstatic VNET_DEFINE(int, ipsec_ah_keymin) = 128; 275207369Sbz 276195727Srwatson#define V_ipsec_esp_keymin VNET(ipsec_esp_keymin) 277195727Srwatson#define V_ipsec_esp_auth VNET(ipsec_esp_auth) 278195727Srwatson#define V_ipsec_ah_keymin VNET(ipsec_ah_keymin) 279195699Srwatson 280105197Ssam#ifdef SYSCTL_DECL 281105197SsamSYSCTL_DECL(_net_key); 282105197Ssam#endif 283105197Ssam 284195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, 285195699Srwatson CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, ""); 286105197Ssam 287105197Ssam/* max count of trial for the decision of spi value */ 288195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, 289195699Srwatson CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, ""); 290105197Ssam 291105197Ssam/* minimum spi value to allocate automatically. */ 292195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MIN_VALUE, 293195699Srwatson spi_minval, CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, ""); 294105197Ssam 295105197Ssam/* maximun spi value to allocate automatically. */ 296195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MAX_VALUE, 297195699Srwatson spi_maxval, CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, ""); 298105197Ssam 299105197Ssam/* interval to initialize randseed */ 300195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_RANDOM_INT, 301195699Srwatson int_random, CTLFLAG_RW, &VNET_NAME(key_int_random), 0, ""); 302105197Ssam 303105197Ssam/* lifetime for larval SA */ 304195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_LARVAL_LIFETIME, 305195699Srwatson larval_lifetime, CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, ""); 306105197Ssam 307105197Ssam/* counter for blocking to send SADB_ACQUIRE to IKEd */ 308195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, 309195699Srwatson blockacq_count, CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, ""); 310105197Ssam 311105197Ssam/* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 312195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, 313195699Srwatson blockacq_lifetime, CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, ""); 314105197Ssam 315105197Ssam/* ESP auth */ 316195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, 317195699Srwatson CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, ""); 318105197Ssam 319105197Ssam/* minimum ESP key length */ 320195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_ESP_KEYMIN, 321195699Srwatson esp_keymin, CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, ""); 322105197Ssam 323105197Ssam/* minimum AH key length */ 324195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, 325195699Srwatson CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, ""); 326105197Ssam 327105197Ssam/* perfered old SA rather than new SA */ 328195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_PREFERED_OLDSA, 329195699Srwatson preferred_oldsa, CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, ""); 330105197Ssam 331105197Ssam#define __LIST_CHAINED(elm) \ 332105197Ssam (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 333105197Ssam#define LIST_INSERT_TAIL(head, elm, type, field) \ 334105197Ssamdo {\ 335105197Ssam struct type *curelm = LIST_FIRST(head); \ 336105197Ssam if (curelm == NULL) {\ 337105197Ssam LIST_INSERT_HEAD(head, elm, field); \ 338105197Ssam } else { \ 339105197Ssam while (LIST_NEXT(curelm, field)) \ 340105197Ssam curelm = LIST_NEXT(curelm, field);\ 341105197Ssam LIST_INSERT_AFTER(curelm, elm, field);\ 342105197Ssam }\ 343105197Ssam} while (0) 344105197Ssam 345105197Ssam#define KEY_CHKSASTATE(head, sav, name) \ 346105197Ssamdo { \ 347105197Ssam if ((head) != (sav)) { \ 348105197Ssam ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 349105197Ssam (name), (head), (sav))); \ 350105197Ssam continue; \ 351105197Ssam } \ 352105197Ssam} while (0) 353105197Ssam 354105197Ssam#define KEY_CHKSPDIR(head, sp, name) \ 355105197Ssamdo { \ 356105197Ssam if ((head) != (sp)) { \ 357105197Ssam ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 358105197Ssam "anyway continue.\n", \ 359105197Ssam (name), (head), (sp))); \ 360105197Ssam } \ 361105197Ssam} while (0) 362105197Ssam 363119643SsamMALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association"); 364119643SsamMALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head"); 365119643SsamMALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy"); 366119643SsamMALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request"); 367119643SsamMALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous"); 368119643SsamMALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire"); 369119643SsamMALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire"); 370105197Ssam 371105197Ssam/* 372105197Ssam * set parameters into secpolicyindex buffer. 373105197Ssam * Must allocate secpolicyindex buffer passed to this function. 374105197Ssam */ 375105197Ssam#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 376105197Ssamdo { \ 377105197Ssam bzero((idx), sizeof(struct secpolicyindex)); \ 378105197Ssam (idx)->dir = (_dir); \ 379105197Ssam (idx)->prefs = (ps); \ 380105197Ssam (idx)->prefd = (pd); \ 381105197Ssam (idx)->ul_proto = (ulp); \ 382105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 383105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 384105197Ssam} while (0) 385105197Ssam 386105197Ssam/* 387105197Ssam * set parameters into secasindex buffer. 388105197Ssam * Must allocate secasindex buffer before calling this function. 389105197Ssam */ 390105197Ssam#define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 391105197Ssamdo { \ 392105197Ssam bzero((idx), sizeof(struct secasindex)); \ 393105197Ssam (idx)->proto = (p); \ 394105197Ssam (idx)->mode = (m); \ 395105197Ssam (idx)->reqid = (r); \ 396105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 397105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 398105197Ssam} while (0) 399105197Ssam 400105197Ssam/* key statistics */ 401105197Ssamstruct _keystat { 402105197Ssam u_long getspi_count; /* the avarage of count to try to get new SPI */ 403105197Ssam} keystat; 404105197Ssam 405105197Ssamstruct sadb_msghdr { 406105197Ssam struct sadb_msg *msg; 407105197Ssam struct sadb_ext *ext[SADB_EXT_MAX + 1]; 408105197Ssam int extoff[SADB_EXT_MAX + 1]; 409105197Ssam int extlen[SADB_EXT_MAX + 1]; 410105197Ssam}; 411105197Ssam 412105197Ssamstatic struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 413105197Ssamstatic void key_freesp_so __P((struct secpolicy **)); 414105197Ssamstatic struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 415105197Ssamstatic void key_delsp __P((struct secpolicy *)); 416105197Ssamstatic struct secpolicy *key_getsp __P((struct secpolicyindex *)); 417119643Ssamstatic void _key_delsp(struct secpolicy *sp); 418105197Ssamstatic struct secpolicy *key_getspbyid __P((u_int32_t)); 419105197Ssamstatic u_int32_t key_newreqid __P((void)); 420105197Ssamstatic struct mbuf *key_gather_mbuf __P((struct mbuf *, 421105197Ssam const struct sadb_msghdr *, int, int, ...)); 422105197Ssamstatic int key_spdadd __P((struct socket *, struct mbuf *, 423105197Ssam const struct sadb_msghdr *)); 424105197Ssamstatic u_int32_t key_getnewspid __P((void)); 425105197Ssamstatic int key_spddelete __P((struct socket *, struct mbuf *, 426105197Ssam const struct sadb_msghdr *)); 427105197Ssamstatic int key_spddelete2 __P((struct socket *, struct mbuf *, 428105197Ssam const struct sadb_msghdr *)); 429105197Ssamstatic int key_spdget __P((struct socket *, struct mbuf *, 430105197Ssam const struct sadb_msghdr *)); 431105197Ssamstatic int key_spdflush __P((struct socket *, struct mbuf *, 432105197Ssam const struct sadb_msghdr *)); 433105197Ssamstatic int key_spddump __P((struct socket *, struct mbuf *, 434105197Ssam const struct sadb_msghdr *)); 435105197Ssamstatic struct mbuf *key_setdumpsp __P((struct secpolicy *, 436105197Ssam u_int8_t, u_int32_t, u_int32_t)); 437105197Ssamstatic u_int key_getspreqmsglen __P((struct secpolicy *)); 438105197Ssamstatic int key_spdexpire __P((struct secpolicy *)); 439105197Ssamstatic struct secashead *key_newsah __P((struct secasindex *)); 440105197Ssamstatic void key_delsah __P((struct secashead *)); 441105197Ssamstatic struct secasvar *key_newsav __P((struct mbuf *, 442105197Ssam const struct sadb_msghdr *, struct secashead *, int *, 443105197Ssam const char*, int)); 444105197Ssam#define KEY_NEWSAV(m, sadb, sah, e) \ 445105197Ssam key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 446105197Ssamstatic void key_delsav __P((struct secasvar *)); 447105197Ssamstatic struct secashead *key_getsah __P((struct secasindex *)); 448105197Ssamstatic struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 449105197Ssamstatic struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 450105197Ssamstatic int key_setsaval __P((struct secasvar *, struct mbuf *, 451105197Ssam const struct sadb_msghdr *)); 452105197Ssamstatic int key_mature __P((struct secasvar *)); 453105197Ssamstatic struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 454105197Ssam u_int8_t, u_int32_t, u_int32_t)); 455105197Ssamstatic struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 456105197Ssam u_int32_t, pid_t, u_int16_t)); 457105197Ssamstatic struct mbuf *key_setsadbsa __P((struct secasvar *)); 458105197Ssamstatic struct mbuf *key_setsadbaddr __P((u_int16_t, 459105197Ssam const struct sockaddr *, u_int8_t, u_int16_t)); 460194062Svanhu#ifdef IPSEC_NAT_T 461194062Svanhustatic struct mbuf *key_setsadbxport(u_int16_t, u_int16_t); 462194062Svanhustatic struct mbuf *key_setsadbxtype(u_int16_t); 463194062Svanhu#endif 464194062Svanhustatic void key_porttosaddr(struct sockaddr *, u_int16_t); 465194062Svanhu#define KEY_PORTTOSADDR(saddr, port) \ 466194062Svanhu key_porttosaddr((struct sockaddr *)(saddr), (port)) 467105197Ssamstatic struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); 468105197Ssamstatic struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 469105197Ssam u_int32_t)); 470157123Sgnnstatic struct seckey *key_dup_keymsg(const struct sadb_key *, u_int, 471157123Sgnn struct malloc_type *); 472157123Sgnnstatic struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src, 473157123Sgnn struct malloc_type *type); 474105197Ssam#ifdef INET6 475105197Ssamstatic int key_ismyaddr6 __P((struct sockaddr_in6 *)); 476105197Ssam#endif 477105197Ssam 478105197Ssam/* flags for key_cmpsaidx() */ 479105197Ssam#define CMP_HEAD 1 /* protocol, addresses. */ 480105197Ssam#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 481105197Ssam#define CMP_REQID 3 /* additionally HEAD, reaid. */ 482105197Ssam#define CMP_EXACTLY 4 /* all elements. */ 483105197Ssamstatic int key_cmpsaidx 484105197Ssam __P((const struct secasindex *, const struct secasindex *, int)); 485105197Ssam 486105197Ssamstatic int key_cmpspidx_exactly 487105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 488105197Ssamstatic int key_cmpspidx_withmask 489105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 490105197Ssamstatic int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 491105197Ssamstatic int key_bbcmp __P((const void *, const void *, u_int)); 492105197Ssamstatic u_int16_t key_satype2proto __P((u_int8_t)); 493105197Ssamstatic u_int8_t key_proto2satype __P((u_int16_t)); 494105197Ssam 495105197Ssamstatic int key_getspi __P((struct socket *, struct mbuf *, 496105197Ssam const struct sadb_msghdr *)); 497105197Ssamstatic u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 498105197Ssam struct secasindex *)); 499105197Ssamstatic int key_update __P((struct socket *, struct mbuf *, 500105197Ssam const struct sadb_msghdr *)); 501105197Ssam#ifdef IPSEC_DOSEQCHECK 502105197Ssamstatic struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 503105197Ssam#endif 504105197Ssamstatic int key_add __P((struct socket *, struct mbuf *, 505105197Ssam const struct sadb_msghdr *)); 506105197Ssamstatic int key_setident __P((struct secashead *, struct mbuf *, 507105197Ssam const struct sadb_msghdr *)); 508105197Ssamstatic struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 509105197Ssam const struct sadb_msghdr *)); 510105197Ssamstatic int key_delete __P((struct socket *, struct mbuf *, 511105197Ssam const struct sadb_msghdr *)); 512105197Ssamstatic int key_get __P((struct socket *, struct mbuf *, 513105197Ssam const struct sadb_msghdr *)); 514105197Ssam 515105197Ssamstatic void key_getcomb_setlifetime __P((struct sadb_comb *)); 516105197Ssamstatic struct mbuf *key_getcomb_esp __P((void)); 517105197Ssamstatic struct mbuf *key_getcomb_ah __P((void)); 518105197Ssamstatic struct mbuf *key_getcomb_ipcomp __P((void)); 519105197Ssamstatic struct mbuf *key_getprop __P((const struct secasindex *)); 520105197Ssam 521105197Ssamstatic int key_acquire __P((const struct secasindex *, struct secpolicy *)); 522105197Ssamstatic struct secacq *key_newacq __P((const struct secasindex *)); 523105197Ssamstatic struct secacq *key_getacq __P((const struct secasindex *)); 524105197Ssamstatic struct secacq *key_getacqbyseq __P((u_int32_t)); 525105197Ssamstatic struct secspacq *key_newspacq __P((struct secpolicyindex *)); 526105197Ssamstatic struct secspacq *key_getspacq __P((struct secpolicyindex *)); 527105197Ssamstatic int key_acquire2 __P((struct socket *, struct mbuf *, 528105197Ssam const struct sadb_msghdr *)); 529105197Ssamstatic int key_register __P((struct socket *, struct mbuf *, 530105197Ssam const struct sadb_msghdr *)); 531105197Ssamstatic int key_expire __P((struct secasvar *)); 532105197Ssamstatic int key_flush __P((struct socket *, struct mbuf *, 533105197Ssam const struct sadb_msghdr *)); 534105197Ssamstatic int key_dump __P((struct socket *, struct mbuf *, 535105197Ssam const struct sadb_msghdr *)); 536105197Ssamstatic int key_promisc __P((struct socket *, struct mbuf *, 537105197Ssam const struct sadb_msghdr *)); 538105197Ssamstatic int key_senderror __P((struct socket *, struct mbuf *, int)); 539105197Ssamstatic int key_validate_ext __P((const struct sadb_ext *, int)); 540105197Ssamstatic int key_align __P((struct mbuf *, struct sadb_msghdr *)); 541157123Sgnnstatic struct mbuf *key_setlifetime(struct seclifetime *src, 542157123Sgnn u_int16_t exttype); 543157123Sgnnstatic struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype); 544157123Sgnn 545105197Ssam#if 0 546105197Ssamstatic const char *key_getfqdn __P((void)); 547105197Ssamstatic const char *key_getuserfqdn __P((void)); 548105197Ssam#endif 549105197Ssamstatic void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 550105197Ssamstatic struct mbuf *key_alloc_mbuf __P((int)); 551105197Ssam 552158767Spjdstatic __inline void 553158767Spjdsa_initref(struct secasvar *sav) 554158767Spjd{ 555105197Ssam 556158767Spjd refcount_init(&sav->refcnt, 1); 557158767Spjd} 558158767Spjdstatic __inline void 559158767Spjdsa_addref(struct secasvar *sav) 560158767Spjd{ 561158767Spjd 562158767Spjd refcount_acquire(&sav->refcnt); 563158767Spjd IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow")); 564158767Spjd} 565158767Spjdstatic __inline int 566158767Spjdsa_delref(struct secasvar *sav) 567158767Spjd{ 568158767Spjd 569158767Spjd IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow")); 570158767Spjd return (refcount_release(&sav->refcnt)); 571158767Spjd} 572158767Spjd 573105197Ssam#define SP_ADDREF(p) do { \ 574105197Ssam (p)->refcnt++; \ 575120585Ssam IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ 576105197Ssam} while (0) 577105197Ssam#define SP_DELREF(p) do { \ 578120585Ssam IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ 579105197Ssam (p)->refcnt--; \ 580105197Ssam} while (0) 581135947Ssam 582105197Ssam 583105197Ssam/* 584135947Ssam * Update the refcnt while holding the SPTREE lock. 585135947Ssam */ 586135947Ssamvoid 587135947Ssamkey_addref(struct secpolicy *sp) 588135947Ssam{ 589135947Ssam SPTREE_LOCK(); 590135947Ssam SP_ADDREF(sp); 591135947Ssam SPTREE_UNLOCK(); 592135947Ssam} 593135947Ssam 594135947Ssam/* 595105197Ssam * Return 0 when there are known to be no SP's for the specified 596105197Ssam * direction. Otherwise return 1. This is used by IPsec code 597105197Ssam * to optimize performance. 598105197Ssam */ 599105197Ssamint 600105197Ssamkey_havesp(u_int dir) 601105197Ssam{ 602183550Szec 603105197Ssam return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 604181803Sbz LIST_FIRST(&V_sptree[dir]) != NULL : 1); 605105197Ssam} 606105197Ssam 607105197Ssam/* %%% IPsec policy management */ 608105197Ssam/* 609105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 610105197Ssam * Must call key_freesp() later. 611105197Ssam * OUT: NULL: not found 612105197Ssam * others: found and return the pointer. 613105197Ssam */ 614105197Ssamstruct secpolicy * 615105197Ssamkey_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 616105197Ssam{ 617105197Ssam struct secpolicy *sp; 618105197Ssam 619120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 620120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 621120585Ssam ("invalid direction %u", dir)); 622105197Ssam 623105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 624120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 625105197Ssam 626105197Ssam /* get a SP entry */ 627105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 628105197Ssam printf("*** objects\n"); 629105197Ssam kdebug_secpolicyindex(spidx)); 630105197Ssam 631120585Ssam SPTREE_LOCK(); 632181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 633105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 634105197Ssam printf("*** in SPD\n"); 635105197Ssam kdebug_secpolicyindex(&sp->spidx)); 636105197Ssam 637105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 638105197Ssam continue; 639105197Ssam if (key_cmpspidx_withmask(&sp->spidx, spidx)) 640105197Ssam goto found; 641105197Ssam } 642105197Ssam sp = NULL; 643105197Ssamfound: 644105197Ssam if (sp) { 645105197Ssam /* sanity check */ 646120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 647105197Ssam 648105197Ssam /* found a SPD entry */ 649105197Ssam sp->lastused = time_second; 650105197Ssam SP_ADDREF(sp); 651105197Ssam } 652120585Ssam SPTREE_UNLOCK(); 653105197Ssam 654105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 655120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 656105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 657105197Ssam return sp; 658105197Ssam} 659105197Ssam 660105197Ssam/* 661105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 662105197Ssam * Must call key_freesp() later. 663105197Ssam * OUT: NULL: not found 664105197Ssam * others: found and return the pointer. 665105197Ssam */ 666105197Ssamstruct secpolicy * 667105197Ssamkey_allocsp2(u_int32_t spi, 668105197Ssam union sockaddr_union *dst, 669105197Ssam u_int8_t proto, 670105197Ssam u_int dir, 671105197Ssam const char* where, int tag) 672105197Ssam{ 673105197Ssam struct secpolicy *sp; 674105197Ssam 675120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst")); 676120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 677120585Ssam ("invalid direction %u", dir)); 678105197Ssam 679105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 680120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 681105197Ssam 682105197Ssam /* get a SP entry */ 683105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 684105197Ssam printf("*** objects\n"); 685105197Ssam printf("spi %u proto %u dir %u\n", spi, proto, dir); 686105197Ssam kdebug_sockaddr(&dst->sa)); 687105197Ssam 688120585Ssam SPTREE_LOCK(); 689181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 690105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 691105197Ssam printf("*** in SPD\n"); 692105197Ssam kdebug_secpolicyindex(&sp->spidx)); 693105197Ssam 694105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 695105197Ssam continue; 696105197Ssam /* compare simple values, then dst address */ 697105197Ssam if (sp->spidx.ul_proto != proto) 698105197Ssam continue; 699105197Ssam /* NB: spi's must exist and match */ 700105197Ssam if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 701105197Ssam continue; 702105197Ssam if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 703105197Ssam goto found; 704105197Ssam } 705105197Ssam sp = NULL; 706105197Ssamfound: 707105197Ssam if (sp) { 708105197Ssam /* sanity check */ 709120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 710105197Ssam 711105197Ssam /* found a SPD entry */ 712105197Ssam sp->lastused = time_second; 713105197Ssam SP_ADDREF(sp); 714105197Ssam } 715120585Ssam SPTREE_UNLOCK(); 716105197Ssam 717105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 718120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 719105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 720105197Ssam return sp; 721105197Ssam} 722105197Ssam 723191599Sbz#if 0 724105197Ssam/* 725105197Ssam * return a policy that matches this particular inbound packet. 726105197Ssam * XXX slow 727105197Ssam */ 728105197Ssamstruct secpolicy * 729105197Ssamkey_gettunnel(const struct sockaddr *osrc, 730105197Ssam const struct sockaddr *odst, 731105197Ssam const struct sockaddr *isrc, 732105197Ssam const struct sockaddr *idst, 733105197Ssam const char* where, int tag) 734105197Ssam{ 735105197Ssam struct secpolicy *sp; 736105197Ssam const int dir = IPSEC_DIR_INBOUND; 737105197Ssam struct ipsecrequest *r1, *r2, *p; 738105197Ssam struct secpolicyindex spidx; 739105197Ssam 740105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 741120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 742105197Ssam 743105197Ssam if (isrc->sa_family != idst->sa_family) { 744120585Ssam ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", 745120585Ssam __func__, isrc->sa_family, idst->sa_family)); 746105197Ssam sp = NULL; 747105197Ssam goto done; 748105197Ssam } 749105197Ssam 750120585Ssam SPTREE_LOCK(); 751181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 752105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 753105197Ssam continue; 754105197Ssam 755105197Ssam r1 = r2 = NULL; 756105197Ssam for (p = sp->req; p; p = p->next) { 757105197Ssam if (p->saidx.mode != IPSEC_MODE_TUNNEL) 758105197Ssam continue; 759105197Ssam 760105197Ssam r1 = r2; 761105197Ssam r2 = p; 762105197Ssam 763105197Ssam if (!r1) { 764105197Ssam /* here we look at address matches only */ 765105197Ssam spidx = sp->spidx; 766105197Ssam if (isrc->sa_len > sizeof(spidx.src) || 767105197Ssam idst->sa_len > sizeof(spidx.dst)) 768105197Ssam continue; 769105197Ssam bcopy(isrc, &spidx.src, isrc->sa_len); 770105197Ssam bcopy(idst, &spidx.dst, idst->sa_len); 771105197Ssam if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 772105197Ssam continue; 773105197Ssam } else { 774105197Ssam if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 775105197Ssam key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 776105197Ssam continue; 777105197Ssam } 778105197Ssam 779105197Ssam if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 780105197Ssam key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 781105197Ssam continue; 782105197Ssam 783105197Ssam goto found; 784105197Ssam } 785105197Ssam } 786105197Ssam sp = NULL; 787105197Ssamfound: 788105197Ssam if (sp) { 789105197Ssam sp->lastused = time_second; 790105197Ssam SP_ADDREF(sp); 791105197Ssam } 792120585Ssam SPTREE_UNLOCK(); 793105197Ssamdone: 794105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 795120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 796105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 797105197Ssam return sp; 798105197Ssam} 799191599Sbz#endif 800105197Ssam 801105197Ssam/* 802105197Ssam * allocating an SA entry for an *OUTBOUND* packet. 803105197Ssam * checking each request entries in SP, and acquire an SA if need. 804105197Ssam * OUT: 0: there are valid requests. 805105197Ssam * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 806105197Ssam */ 807105197Ssamint 808105197Ssamkey_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 809105197Ssam{ 810105197Ssam u_int level; 811105197Ssam int error; 812105197Ssam 813120585Ssam IPSEC_ASSERT(isr != NULL, ("null isr")); 814120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 815120585Ssam IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 816105197Ssam saidx->mode == IPSEC_MODE_TUNNEL, 817120585Ssam ("unexpected policy %u", saidx->mode)); 818105197Ssam 819105197Ssam /* 820105197Ssam * XXX guard against protocol callbacks from the crypto 821105197Ssam * thread as they reference ipsecrequest.sav which we 822105197Ssam * temporarily null out below. Need to rethink how we 823105197Ssam * handle bundled SA's in the callback thread. 824105197Ssam */ 825120585Ssam IPSECREQUEST_LOCK_ASSERT(isr); 826119643Ssam 827119643Ssam /* get current level */ 828119643Ssam level = ipsec_get_reqlevel(isr); 829105197Ssam#if 0 830105197Ssam /* 831105197Ssam * We do allocate new SA only if the state of SA in the holder is 832105197Ssam * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 833105197Ssam */ 834105197Ssam if (isr->sav != NULL) { 835105197Ssam if (isr->sav->sah == NULL) 836120585Ssam panic("%s: sah is null.\n", __func__); 837105197Ssam if (isr->sav == (struct secasvar *)LIST_FIRST( 838105197Ssam &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 839105197Ssam KEY_FREESAV(&isr->sav); 840105197Ssam isr->sav = NULL; 841105197Ssam } 842105197Ssam } 843105197Ssam#else 844105197Ssam /* 845105197Ssam * we free any SA stashed in the IPsec request because a different 846105197Ssam * SA may be involved each time this request is checked, either 847105197Ssam * because new SAs are being configured, or this request is 848105197Ssam * associated with an unconnected datagram socket, or this request 849105197Ssam * is associated with a system default policy. 850105197Ssam * 851105197Ssam * The operation may have negative impact to performance. We may 852105197Ssam * want to check cached SA carefully, rather than picking new SA 853105197Ssam * every time. 854105197Ssam */ 855105197Ssam if (isr->sav != NULL) { 856105197Ssam KEY_FREESAV(&isr->sav); 857105197Ssam isr->sav = NULL; 858105197Ssam } 859105197Ssam#endif 860105197Ssam 861105197Ssam /* 862105197Ssam * new SA allocation if no SA found. 863105197Ssam * key_allocsa_policy should allocate the oldest SA available. 864105197Ssam * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 865105197Ssam */ 866105197Ssam if (isr->sav == NULL) 867105197Ssam isr->sav = key_allocsa_policy(saidx); 868105197Ssam 869105197Ssam /* When there is SA. */ 870105197Ssam if (isr->sav != NULL) { 871105197Ssam if (isr->sav->state != SADB_SASTATE_MATURE && 872105197Ssam isr->sav->state != SADB_SASTATE_DYING) 873105197Ssam return EINVAL; 874105197Ssam return 0; 875105197Ssam } 876105197Ssam 877105197Ssam /* there is no SA */ 878105197Ssam error = key_acquire(saidx, isr->sp); 879105197Ssam if (error != 0) { 880105197Ssam /* XXX What should I do ? */ 881120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 882120585Ssam __func__, error)); 883105197Ssam return error; 884105197Ssam } 885105197Ssam 886105197Ssam if (level != IPSEC_LEVEL_REQUIRE) { 887105197Ssam /* XXX sigh, the interface to this routine is botched */ 888120585Ssam IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); 889105197Ssam return 0; 890105197Ssam } else { 891105197Ssam return ENOENT; 892105197Ssam } 893105197Ssam} 894105197Ssam 895105197Ssam/* 896105197Ssam * allocating a SA for policy entry from SAD. 897105197Ssam * NOTE: searching SAD of aliving state. 898105197Ssam * OUT: NULL: not found. 899105197Ssam * others: found and return the pointer. 900105197Ssam */ 901105197Ssamstatic struct secasvar * 902105197Ssamkey_allocsa_policy(const struct secasindex *saidx) 903105197Ssam{ 904128856Ssam#define N(a) _ARRAYLEN(a) 905105197Ssam struct secashead *sah; 906105197Ssam struct secasvar *sav; 907128856Ssam u_int stateidx, arraysize; 908128856Ssam const u_int *state_valid; 909105197Ssam 910196902Spjd state_valid = NULL; /* silence gcc */ 911196902Spjd arraysize = 0; /* silence gcc */ 912196896Spjd 913120585Ssam SAHTREE_LOCK(); 914181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 915105197Ssam if (sah->state == SADB_SASTATE_DEAD) 916105197Ssam continue; 917119643Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { 918181803Sbz if (V_key_preferred_oldsa) { 919128856Ssam state_valid = saorder_state_valid_prefer_old; 920128856Ssam arraysize = N(saorder_state_valid_prefer_old); 921128856Ssam } else { 922128856Ssam state_valid = saorder_state_valid_prefer_new; 923128856Ssam arraysize = N(saorder_state_valid_prefer_new); 924128856Ssam } 925196883Spjd break; 926119643Ssam } 927105197Ssam } 928120585Ssam SAHTREE_UNLOCK(); 929196883Spjd if (sah == NULL) 930196883Spjd return NULL; 931105197Ssam 932105197Ssam /* search valid state */ 933128856Ssam for (stateidx = 0; stateidx < arraysize; stateidx++) { 934128856Ssam sav = key_do_allocsa_policy(sah, state_valid[stateidx]); 935105197Ssam if (sav != NULL) 936105197Ssam return sav; 937105197Ssam } 938105197Ssam 939105197Ssam return NULL; 940128856Ssam#undef N 941105197Ssam} 942105197Ssam 943105197Ssam/* 944105197Ssam * searching SAD with direction, protocol, mode and state. 945105197Ssam * called by key_allocsa_policy(). 946105197Ssam * OUT: 947105197Ssam * NULL : not found 948105197Ssam * others : found, pointer to a SA. 949105197Ssam */ 950105197Ssamstatic struct secasvar * 951105197Ssamkey_do_allocsa_policy(struct secashead *sah, u_int state) 952105197Ssam{ 953105197Ssam struct secasvar *sav, *nextsav, *candidate, *d; 954105197Ssam 955105197Ssam /* initilize */ 956105197Ssam candidate = NULL; 957105197Ssam 958120585Ssam SAHTREE_LOCK(); 959105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 960105197Ssam sav != NULL; 961105197Ssam sav = nextsav) { 962105197Ssam 963105197Ssam nextsav = LIST_NEXT(sav, chain); 964105197Ssam 965105197Ssam /* sanity check */ 966120585Ssam KEY_CHKSASTATE(sav->state, state, __func__); 967105197Ssam 968105197Ssam /* initialize */ 969105197Ssam if (candidate == NULL) { 970105197Ssam candidate = sav; 971105197Ssam continue; 972105197Ssam } 973105197Ssam 974105197Ssam /* Which SA is the better ? */ 975105197Ssam 976120585Ssam IPSEC_ASSERT(candidate->lft_c != NULL, 977120585Ssam ("null candidate lifetime")); 978120585Ssam IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime")); 979105197Ssam 980105197Ssam /* What the best method is to compare ? */ 981181803Sbz if (V_key_preferred_oldsa) { 982157123Sgnn if (candidate->lft_c->addtime > 983157123Sgnn sav->lft_c->addtime) { 984105197Ssam candidate = sav; 985105197Ssam } 986105197Ssam continue; 987105197Ssam /*NOTREACHED*/ 988105197Ssam } 989105197Ssam 990125876Sguido /* preferred new sa rather than old sa */ 991157123Sgnn if (candidate->lft_c->addtime < 992157123Sgnn sav->lft_c->addtime) { 993105197Ssam d = candidate; 994105197Ssam candidate = sav; 995105197Ssam } else 996105197Ssam d = sav; 997105197Ssam 998105197Ssam /* 999105197Ssam * prepared to delete the SA when there is more 1000105197Ssam * suitable candidate and the lifetime of the SA is not 1001105197Ssam * permanent. 1002105197Ssam */ 1003177553Sbz if (d->lft_h->addtime != 0) { 1004105197Ssam struct mbuf *m, *result; 1005125508Ssam u_int8_t satype; 1006105197Ssam 1007105197Ssam key_sa_chgstate(d, SADB_SASTATE_DEAD); 1008105197Ssam 1009120585Ssam IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count")); 1010125508Ssam 1011125508Ssam satype = key_proto2satype(d->sah->saidx.proto); 1012125508Ssam if (satype == 0) 1013125508Ssam goto msgfail; 1014125508Ssam 1015105197Ssam m = key_setsadbmsg(SADB_DELETE, 0, 1016125508Ssam satype, 0, 0, d->refcnt - 1); 1017105197Ssam if (!m) 1018105197Ssam goto msgfail; 1019105197Ssam result = m; 1020105197Ssam 1021105197Ssam /* set sadb_address for saidx's. */ 1022105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1023105197Ssam &d->sah->saidx.src.sa, 1024105197Ssam d->sah->saidx.src.sa.sa_len << 3, 1025105197Ssam IPSEC_ULPROTO_ANY); 1026105197Ssam if (!m) 1027105197Ssam goto msgfail; 1028105197Ssam m_cat(result, m); 1029105197Ssam 1030105197Ssam /* set sadb_address for saidx's. */ 1031105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1032128860Ssam &d->sah->saidx.dst.sa, 1033128860Ssam d->sah->saidx.dst.sa.sa_len << 3, 1034105197Ssam IPSEC_ULPROTO_ANY); 1035105197Ssam if (!m) 1036105197Ssam goto msgfail; 1037105197Ssam m_cat(result, m); 1038105197Ssam 1039105197Ssam /* create SA extension */ 1040105197Ssam m = key_setsadbsa(d); 1041105197Ssam if (!m) 1042105197Ssam goto msgfail; 1043105197Ssam m_cat(result, m); 1044105197Ssam 1045105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 1046105197Ssam result = m_pullup(result, 1047105197Ssam sizeof(struct sadb_msg)); 1048105197Ssam if (result == NULL) 1049105197Ssam goto msgfail; 1050105197Ssam } 1051105197Ssam 1052105197Ssam result->m_pkthdr.len = 0; 1053105197Ssam for (m = result; m; m = m->m_next) 1054105197Ssam result->m_pkthdr.len += m->m_len; 1055105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 1056105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 1057105197Ssam 1058105197Ssam if (key_sendup_mbuf(NULL, result, 1059105197Ssam KEY_SENDUP_REGISTERED)) 1060105197Ssam goto msgfail; 1061105197Ssam msgfail: 1062105197Ssam KEY_FREESAV(&d); 1063105197Ssam } 1064105197Ssam } 1065105197Ssam if (candidate) { 1066158767Spjd sa_addref(candidate); 1067105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1068120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 1069120585Ssam __func__, candidate->refcnt, candidate)); 1070105197Ssam } 1071120585Ssam SAHTREE_UNLOCK(); 1072119643Ssam 1073105197Ssam return candidate; 1074105197Ssam} 1075105197Ssam 1076105197Ssam/* 1077105197Ssam * allocating a usable SA entry for a *INBOUND* packet. 1078105197Ssam * Must call key_freesav() later. 1079105197Ssam * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1080105197Ssam * NULL: not found, or error occured. 1081105197Ssam * 1082105197Ssam * In the comparison, no source address is used--for RFC2401 conformance. 1083105197Ssam * To quote, from section 4.1: 1084105197Ssam * A security association is uniquely identified by a triple consisting 1085105197Ssam * of a Security Parameter Index (SPI), an IP Destination Address, and a 1086105197Ssam * security protocol (AH or ESP) identifier. 1087105197Ssam * Note that, however, we do need to keep source address in IPsec SA. 1088105197Ssam * IKE specification and PF_KEY specification do assume that we 1089105197Ssam * keep source address in IPsec SA. We see a tricky situation here. 1090105197Ssam */ 1091105197Ssamstruct secasvar * 1092105197Ssamkey_allocsa( 1093105197Ssam union sockaddr_union *dst, 1094105197Ssam u_int proto, 1095105197Ssam u_int32_t spi, 1096105197Ssam const char* where, int tag) 1097105197Ssam{ 1098105197Ssam struct secashead *sah; 1099105197Ssam struct secasvar *sav; 1100128856Ssam u_int stateidx, arraysize, state; 1101128856Ssam const u_int *saorder_state_valid; 1102194062Svanhu int chkport; 1103105197Ssam 1104120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst address")); 1105105197Ssam 1106105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1107120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 1108105197Ssam 1109194062Svanhu#ifdef IPSEC_NAT_T 1110194062Svanhu chkport = (dst->sa.sa_family == AF_INET && 1111194062Svanhu dst->sa.sa_len == sizeof(struct sockaddr_in) && 1112194062Svanhu dst->sin.sin_port != 0); 1113194062Svanhu#else 1114194062Svanhu chkport = 0; 1115194062Svanhu#endif 1116194062Svanhu 1117105197Ssam /* 1118105197Ssam * searching SAD. 1119105197Ssam * XXX: to be checked internal IP header somewhere. Also when 1120105197Ssam * IPsec tunnel packet is received. But ESP tunnel mode is 1121105197Ssam * encrypted so we can't check internal IP header. 1122105197Ssam */ 1123120585Ssam SAHTREE_LOCK(); 1124181803Sbz if (V_key_preferred_oldsa) { 1125128856Ssam saorder_state_valid = saorder_state_valid_prefer_old; 1126128856Ssam arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1127128856Ssam } else { 1128128856Ssam saorder_state_valid = saorder_state_valid_prefer_new; 1129128856Ssam arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1130128856Ssam } 1131181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 1132105197Ssam /* search valid state */ 1133128856Ssam for (stateidx = 0; stateidx < arraysize; stateidx++) { 1134105197Ssam state = saorder_state_valid[stateidx]; 1135105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 1136105197Ssam /* sanity check */ 1137120585Ssam KEY_CHKSASTATE(sav->state, state, __func__); 1138105197Ssam /* do not return entries w/ unusable state */ 1139105197Ssam if (sav->state != SADB_SASTATE_MATURE && 1140105197Ssam sav->state != SADB_SASTATE_DYING) 1141105197Ssam continue; 1142105197Ssam if (proto != sav->sah->saidx.proto) 1143105197Ssam continue; 1144105197Ssam if (spi != sav->spi) 1145105197Ssam continue; 1146105197Ssam#if 0 /* don't check src */ 1147105197Ssam /* check src address */ 1148194062Svanhu if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, chkport) != 0) 1149105197Ssam continue; 1150105197Ssam#endif 1151105197Ssam /* check dst address */ 1152194062Svanhu if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1153105197Ssam continue; 1154158767Spjd sa_addref(sav); 1155105197Ssam goto done; 1156105197Ssam } 1157105197Ssam } 1158105197Ssam } 1159105197Ssam sav = NULL; 1160105197Ssamdone: 1161120585Ssam SAHTREE_UNLOCK(); 1162105197Ssam 1163105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1164120585Ssam printf("DP %s return SA:%p; refcnt %u\n", __func__, 1165105197Ssam sav, sav ? sav->refcnt : 0)); 1166105197Ssam return sav; 1167105197Ssam} 1168105197Ssam 1169105197Ssam/* 1170105197Ssam * Must be called after calling key_allocsp(). 1171105197Ssam * For both the packet without socket and key_freeso(). 1172105197Ssam */ 1173105197Ssamvoid 1174105197Ssam_key_freesp(struct secpolicy **spp, const char* where, int tag) 1175105197Ssam{ 1176105197Ssam struct secpolicy *sp = *spp; 1177105197Ssam 1178120585Ssam IPSEC_ASSERT(sp != NULL, ("null sp")); 1179105197Ssam 1180120585Ssam SPTREE_LOCK(); 1181105197Ssam SP_DELREF(sp); 1182105197Ssam 1183105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1184120585Ssam printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1185120585Ssam __func__, sp, sp->id, where, tag, sp->refcnt)); 1186105197Ssam 1187105197Ssam if (sp->refcnt == 0) { 1188105197Ssam *spp = NULL; 1189105197Ssam key_delsp(sp); 1190105197Ssam } 1191120585Ssam SPTREE_UNLOCK(); 1192105197Ssam} 1193105197Ssam 1194105197Ssam/* 1195105197Ssam * Must be called after calling key_allocsp(). 1196105197Ssam * For the packet with socket. 1197105197Ssam */ 1198105197Ssamvoid 1199105197Ssamkey_freeso(struct socket *so) 1200105197Ssam{ 1201120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 1202105197Ssam 1203105197Ssam switch (so->so_proto->pr_domain->dom_family) { 1204186141Sbz#if defined(INET) || defined(INET6) 1205105197Ssam#ifdef INET 1206105197Ssam case PF_INET: 1207105197Ssam#endif 1208105197Ssam#ifdef INET6 1209105197Ssam case PF_INET6: 1210186141Sbz#endif 1211105197Ssam { 1212186141Sbz struct inpcb *pcb = sotoinpcb(so); 1213105197Ssam 1214105197Ssam /* Does it have a PCB ? */ 1215105197Ssam if (pcb == NULL) 1216105197Ssam return; 1217105197Ssam key_freesp_so(&pcb->inp_sp->sp_in); 1218105197Ssam key_freesp_so(&pcb->inp_sp->sp_out); 1219105197Ssam } 1220105197Ssam break; 1221186141Sbz#endif /* INET || INET6 */ 1222105197Ssam default: 1223120585Ssam ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n", 1224120585Ssam __func__, so->so_proto->pr_domain->dom_family)); 1225105197Ssam return; 1226105197Ssam } 1227105197Ssam} 1228105197Ssam 1229105197Ssamstatic void 1230105197Ssamkey_freesp_so(struct secpolicy **sp) 1231105197Ssam{ 1232120585Ssam IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp")); 1233105197Ssam 1234105197Ssam if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1235105197Ssam (*sp)->policy == IPSEC_POLICY_BYPASS) 1236105197Ssam return; 1237105197Ssam 1238120585Ssam IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1239120585Ssam ("invalid policy %u", (*sp)->policy)); 1240105197Ssam KEY_FREESP(sp); 1241105197Ssam} 1242105197Ssam 1243105197Ssam/* 1244105197Ssam * Must be called after calling key_allocsa(). 1245105197Ssam * This function is called by key_freesp() to free some SA allocated 1246105197Ssam * for a policy. 1247105197Ssam */ 1248105197Ssamvoid 1249105197Ssamkey_freesav(struct secasvar **psav, const char* where, int tag) 1250105197Ssam{ 1251105197Ssam struct secasvar *sav = *psav; 1252105197Ssam 1253120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 1254105197Ssam 1255158767Spjd if (sa_delref(sav)) { 1256158767Spjd KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1257158767Spjd printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1258158767Spjd __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1259105197Ssam *psav = NULL; 1260105197Ssam key_delsav(sav); 1261158767Spjd } else { 1262158767Spjd KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1263158767Spjd printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1264158767Spjd __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1265105197Ssam } 1266105197Ssam} 1267105197Ssam 1268105197Ssam/* %%% SPD management */ 1269105197Ssam/* 1270105197Ssam * free security policy entry. 1271105197Ssam */ 1272105197Ssamstatic void 1273105197Ssamkey_delsp(struct secpolicy *sp) 1274105197Ssam{ 1275119643Ssam struct ipsecrequest *isr, *nextisr; 1276105197Ssam 1277120585Ssam IPSEC_ASSERT(sp != NULL, ("null sp")); 1278120585Ssam SPTREE_LOCK_ASSERT(); 1279105197Ssam 1280105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 1281105197Ssam 1282120585Ssam IPSEC_ASSERT(sp->refcnt == 0, 1283120585Ssam ("SP with references deleted (refcnt %u)", sp->refcnt)); 1284105197Ssam 1285105197Ssam /* remove from SP index */ 1286105197Ssam if (__LIST_CHAINED(sp)) 1287105197Ssam LIST_REMOVE(sp, chain); 1288105197Ssam 1289119643Ssam for (isr = sp->req; isr != NULL; isr = nextisr) { 1290105197Ssam if (isr->sav != NULL) { 1291105197Ssam KEY_FREESAV(&isr->sav); 1292105197Ssam isr->sav = NULL; 1293105197Ssam } 1294105197Ssam 1295105197Ssam nextisr = isr->next; 1296119643Ssam ipsec_delisr(isr); 1297105197Ssam } 1298119643Ssam _key_delsp(sp); 1299105197Ssam} 1300105197Ssam 1301105197Ssam/* 1302105197Ssam * search SPD 1303105197Ssam * OUT: NULL : not found 1304105197Ssam * others : found, pointer to a SP. 1305105197Ssam */ 1306105197Ssamstatic struct secpolicy * 1307105197Ssamkey_getsp(struct secpolicyindex *spidx) 1308105197Ssam{ 1309105197Ssam struct secpolicy *sp; 1310105197Ssam 1311120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 1312105197Ssam 1313120585Ssam SPTREE_LOCK(); 1314181803Sbz LIST_FOREACH(sp, &V_sptree[spidx->dir], chain) { 1315105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1316105197Ssam continue; 1317105197Ssam if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1318105197Ssam SP_ADDREF(sp); 1319119643Ssam break; 1320105197Ssam } 1321105197Ssam } 1322120585Ssam SPTREE_UNLOCK(); 1323105197Ssam 1324119643Ssam return sp; 1325105197Ssam} 1326105197Ssam 1327105197Ssam/* 1328105197Ssam * get SP by index. 1329105197Ssam * OUT: NULL : not found 1330105197Ssam * others : found, pointer to a SP. 1331105197Ssam */ 1332105197Ssamstatic struct secpolicy * 1333105197Ssamkey_getspbyid(u_int32_t id) 1334105197Ssam{ 1335105197Ssam struct secpolicy *sp; 1336105197Ssam 1337120585Ssam SPTREE_LOCK(); 1338181803Sbz LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) { 1339105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1340105197Ssam continue; 1341105197Ssam if (sp->id == id) { 1342105197Ssam SP_ADDREF(sp); 1343119643Ssam goto done; 1344105197Ssam } 1345105197Ssam } 1346105197Ssam 1347181803Sbz LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) { 1348105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1349105197Ssam continue; 1350105197Ssam if (sp->id == id) { 1351105197Ssam SP_ADDREF(sp); 1352119643Ssam goto done; 1353105197Ssam } 1354105197Ssam } 1355119643Ssamdone: 1356120585Ssam SPTREE_UNLOCK(); 1357105197Ssam 1358119643Ssam return sp; 1359105197Ssam} 1360105197Ssam 1361105197Ssamstruct secpolicy * 1362105197Ssamkey_newsp(const char* where, int tag) 1363105197Ssam{ 1364105197Ssam struct secpolicy *newsp = NULL; 1365105197Ssam 1366105197Ssam newsp = (struct secpolicy *) 1367119643Ssam malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO); 1368105197Ssam if (newsp) { 1369120585Ssam SECPOLICY_LOCK_INIT(newsp); 1370105197Ssam newsp->refcnt = 1; 1371105197Ssam newsp->req = NULL; 1372105197Ssam } 1373105197Ssam 1374105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1375120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 1376105197Ssam where, tag, newsp)); 1377105197Ssam return newsp; 1378105197Ssam} 1379105197Ssam 1380119643Ssamstatic void 1381119643Ssam_key_delsp(struct secpolicy *sp) 1382119643Ssam{ 1383120585Ssam SECPOLICY_LOCK_DESTROY(sp); 1384119643Ssam free(sp, M_IPSEC_SP); 1385119643Ssam} 1386119643Ssam 1387105197Ssam/* 1388105197Ssam * create secpolicy structure from sadb_x_policy structure. 1389105197Ssam * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1390105197Ssam * so must be set properly later. 1391105197Ssam */ 1392105197Ssamstruct secpolicy * 1393105197Ssamkey_msg2sp(xpl0, len, error) 1394105197Ssam struct sadb_x_policy *xpl0; 1395105197Ssam size_t len; 1396105197Ssam int *error; 1397105197Ssam{ 1398105197Ssam struct secpolicy *newsp; 1399105197Ssam 1400120585Ssam IPSEC_ASSERT(xpl0 != NULL, ("null xpl0")); 1401127972Spjd IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len)); 1402120585Ssam 1403105197Ssam if (len != PFKEY_EXTLEN(xpl0)) { 1404120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__)); 1405105197Ssam *error = EINVAL; 1406105197Ssam return NULL; 1407105197Ssam } 1408105197Ssam 1409105197Ssam if ((newsp = KEY_NEWSP()) == NULL) { 1410105197Ssam *error = ENOBUFS; 1411105197Ssam return NULL; 1412105197Ssam } 1413105197Ssam 1414105197Ssam newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1415105197Ssam newsp->policy = xpl0->sadb_x_policy_type; 1416105197Ssam 1417105197Ssam /* check policy */ 1418105197Ssam switch (xpl0->sadb_x_policy_type) { 1419105197Ssam case IPSEC_POLICY_DISCARD: 1420105197Ssam case IPSEC_POLICY_NONE: 1421105197Ssam case IPSEC_POLICY_ENTRUST: 1422105197Ssam case IPSEC_POLICY_BYPASS: 1423105197Ssam newsp->req = NULL; 1424105197Ssam break; 1425105197Ssam 1426105197Ssam case IPSEC_POLICY_IPSEC: 1427105197Ssam { 1428105197Ssam int tlen; 1429105197Ssam struct sadb_x_ipsecrequest *xisr; 1430105197Ssam struct ipsecrequest **p_isr = &newsp->req; 1431105197Ssam 1432105197Ssam /* validity check */ 1433105197Ssam if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1434120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", 1435120585Ssam __func__)); 1436105197Ssam KEY_FREESP(&newsp); 1437105197Ssam *error = EINVAL; 1438105197Ssam return NULL; 1439105197Ssam } 1440105197Ssam 1441105197Ssam tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1442105197Ssam xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1443105197Ssam 1444105197Ssam while (tlen > 0) { 1445105197Ssam /* length check */ 1446105197Ssam if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1447120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest " 1448120585Ssam "length.\n", __func__)); 1449105197Ssam KEY_FREESP(&newsp); 1450105197Ssam *error = EINVAL; 1451105197Ssam return NULL; 1452105197Ssam } 1453105197Ssam 1454105197Ssam /* allocate request buffer */ 1455119643Ssam /* NB: data structure is zero'd */ 1456119643Ssam *p_isr = ipsec_newisr(); 1457105197Ssam if ((*p_isr) == NULL) { 1458105197Ssam ipseclog((LOG_DEBUG, 1459120585Ssam "%s: No more memory.\n", __func__)); 1460105197Ssam KEY_FREESP(&newsp); 1461105197Ssam *error = ENOBUFS; 1462105197Ssam return NULL; 1463105197Ssam } 1464105197Ssam 1465105197Ssam /* set values */ 1466105197Ssam switch (xisr->sadb_x_ipsecrequest_proto) { 1467105197Ssam case IPPROTO_ESP: 1468105197Ssam case IPPROTO_AH: 1469105197Ssam case IPPROTO_IPCOMP: 1470105197Ssam break; 1471105197Ssam default: 1472105197Ssam ipseclog((LOG_DEBUG, 1473120585Ssam "%s: invalid proto type=%u\n", __func__, 1474105197Ssam xisr->sadb_x_ipsecrequest_proto)); 1475105197Ssam KEY_FREESP(&newsp); 1476105197Ssam *error = EPROTONOSUPPORT; 1477105197Ssam return NULL; 1478105197Ssam } 1479105197Ssam (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1480105197Ssam 1481105197Ssam switch (xisr->sadb_x_ipsecrequest_mode) { 1482105197Ssam case IPSEC_MODE_TRANSPORT: 1483105197Ssam case IPSEC_MODE_TUNNEL: 1484105197Ssam break; 1485105197Ssam case IPSEC_MODE_ANY: 1486105197Ssam default: 1487105197Ssam ipseclog((LOG_DEBUG, 1488120585Ssam "%s: invalid mode=%u\n", __func__, 1489105197Ssam xisr->sadb_x_ipsecrequest_mode)); 1490105197Ssam KEY_FREESP(&newsp); 1491105197Ssam *error = EINVAL; 1492105197Ssam return NULL; 1493105197Ssam } 1494105197Ssam (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1495105197Ssam 1496105197Ssam switch (xisr->sadb_x_ipsecrequest_level) { 1497105197Ssam case IPSEC_LEVEL_DEFAULT: 1498105197Ssam case IPSEC_LEVEL_USE: 1499105197Ssam case IPSEC_LEVEL_REQUIRE: 1500105197Ssam break; 1501105197Ssam case IPSEC_LEVEL_UNIQUE: 1502105197Ssam /* validity check */ 1503105197Ssam /* 1504105197Ssam * If range violation of reqid, kernel will 1505105197Ssam * update it, don't refuse it. 1506105197Ssam */ 1507105197Ssam if (xisr->sadb_x_ipsecrequest_reqid 1508105197Ssam > IPSEC_MANUAL_REQID_MAX) { 1509105197Ssam ipseclog((LOG_DEBUG, 1510120585Ssam "%s: reqid=%d range " 1511105197Ssam "violation, updated by kernel.\n", 1512120585Ssam __func__, 1513105197Ssam xisr->sadb_x_ipsecrequest_reqid)); 1514105197Ssam xisr->sadb_x_ipsecrequest_reqid = 0; 1515105197Ssam } 1516105197Ssam 1517105197Ssam /* allocate new reqid id if reqid is zero. */ 1518105197Ssam if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1519105197Ssam u_int32_t reqid; 1520105197Ssam if ((reqid = key_newreqid()) == 0) { 1521105197Ssam KEY_FREESP(&newsp); 1522105197Ssam *error = ENOBUFS; 1523105197Ssam return NULL; 1524105197Ssam } 1525105197Ssam (*p_isr)->saidx.reqid = reqid; 1526105197Ssam xisr->sadb_x_ipsecrequest_reqid = reqid; 1527105197Ssam } else { 1528105197Ssam /* set it for manual keying. */ 1529105197Ssam (*p_isr)->saidx.reqid = 1530105197Ssam xisr->sadb_x_ipsecrequest_reqid; 1531105197Ssam } 1532105197Ssam break; 1533105197Ssam 1534105197Ssam default: 1535120585Ssam ipseclog((LOG_DEBUG, "%s: invalid level=%u\n", 1536120585Ssam __func__, 1537105197Ssam xisr->sadb_x_ipsecrequest_level)); 1538105197Ssam KEY_FREESP(&newsp); 1539105197Ssam *error = EINVAL; 1540105197Ssam return NULL; 1541105197Ssam } 1542105197Ssam (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1543105197Ssam 1544105197Ssam /* set IP addresses if there */ 1545105197Ssam if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1546105197Ssam struct sockaddr *paddr; 1547105197Ssam 1548105197Ssam paddr = (struct sockaddr *)(xisr + 1); 1549105197Ssam 1550105197Ssam /* validity check */ 1551105197Ssam if (paddr->sa_len 1552105197Ssam > sizeof((*p_isr)->saidx.src)) { 1553120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 1554120585Ssam "request address length.\n", 1555120585Ssam __func__)); 1556105197Ssam KEY_FREESP(&newsp); 1557105197Ssam *error = EINVAL; 1558105197Ssam return NULL; 1559105197Ssam } 1560105197Ssam bcopy(paddr, &(*p_isr)->saidx.src, 1561105197Ssam paddr->sa_len); 1562105197Ssam 1563105197Ssam paddr = (struct sockaddr *)((caddr_t)paddr 1564105197Ssam + paddr->sa_len); 1565105197Ssam 1566105197Ssam /* validity check */ 1567105197Ssam if (paddr->sa_len 1568105197Ssam > sizeof((*p_isr)->saidx.dst)) { 1569120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 1570120585Ssam "request address length.\n", 1571120585Ssam __func__)); 1572105197Ssam KEY_FREESP(&newsp); 1573105197Ssam *error = EINVAL; 1574105197Ssam return NULL; 1575105197Ssam } 1576105197Ssam bcopy(paddr, &(*p_isr)->saidx.dst, 1577105197Ssam paddr->sa_len); 1578105197Ssam } 1579105197Ssam 1580105197Ssam (*p_isr)->sp = newsp; 1581105197Ssam 1582105197Ssam /* initialization for the next. */ 1583105197Ssam p_isr = &(*p_isr)->next; 1584105197Ssam tlen -= xisr->sadb_x_ipsecrequest_len; 1585105197Ssam 1586105197Ssam /* validity check */ 1587105197Ssam if (tlen < 0) { 1588120585Ssam ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n", 1589120585Ssam __func__)); 1590105197Ssam KEY_FREESP(&newsp); 1591105197Ssam *error = EINVAL; 1592105197Ssam return NULL; 1593105197Ssam } 1594105197Ssam 1595105197Ssam xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr 1596105197Ssam + xisr->sadb_x_ipsecrequest_len); 1597105197Ssam } 1598105197Ssam } 1599105197Ssam break; 1600105197Ssam default: 1601120585Ssam ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); 1602105197Ssam KEY_FREESP(&newsp); 1603105197Ssam *error = EINVAL; 1604105197Ssam return NULL; 1605105197Ssam } 1606105197Ssam 1607105197Ssam *error = 0; 1608105197Ssam return newsp; 1609105197Ssam} 1610105197Ssam 1611105197Ssamstatic u_int32_t 1612105197Ssamkey_newreqid() 1613105197Ssam{ 1614105197Ssam static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1615105197Ssam 1616105197Ssam auto_reqid = (auto_reqid == ~0 1617105197Ssam ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1618105197Ssam 1619105197Ssam /* XXX should be unique check */ 1620105197Ssam 1621105197Ssam return auto_reqid; 1622105197Ssam} 1623105197Ssam 1624105197Ssam/* 1625105197Ssam * copy secpolicy struct to sadb_x_policy structure indicated. 1626105197Ssam */ 1627105197Ssamstruct mbuf * 1628105197Ssamkey_sp2msg(sp) 1629105197Ssam struct secpolicy *sp; 1630105197Ssam{ 1631105197Ssam struct sadb_x_policy *xpl; 1632105197Ssam int tlen; 1633105197Ssam caddr_t p; 1634105197Ssam struct mbuf *m; 1635105197Ssam 1636120585Ssam IPSEC_ASSERT(sp != NULL, ("null policy")); 1637105197Ssam 1638105197Ssam tlen = key_getspreqmsglen(sp); 1639105197Ssam 1640105197Ssam m = key_alloc_mbuf(tlen); 1641105197Ssam if (!m || m->m_next) { /*XXX*/ 1642105197Ssam if (m) 1643105197Ssam m_freem(m); 1644105197Ssam return NULL; 1645105197Ssam } 1646105197Ssam 1647105197Ssam m->m_len = tlen; 1648105197Ssam m->m_next = NULL; 1649105197Ssam xpl = mtod(m, struct sadb_x_policy *); 1650105197Ssam bzero(xpl, tlen); 1651105197Ssam 1652105197Ssam xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1653105197Ssam xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1654105197Ssam xpl->sadb_x_policy_type = sp->policy; 1655105197Ssam xpl->sadb_x_policy_dir = sp->spidx.dir; 1656105197Ssam xpl->sadb_x_policy_id = sp->id; 1657105197Ssam p = (caddr_t)xpl + sizeof(*xpl); 1658105197Ssam 1659105197Ssam /* if is the policy for ipsec ? */ 1660105197Ssam if (sp->policy == IPSEC_POLICY_IPSEC) { 1661105197Ssam struct sadb_x_ipsecrequest *xisr; 1662105197Ssam struct ipsecrequest *isr; 1663105197Ssam 1664105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 1665105197Ssam 1666105197Ssam xisr = (struct sadb_x_ipsecrequest *)p; 1667105197Ssam 1668105197Ssam xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1669105197Ssam xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1670105197Ssam xisr->sadb_x_ipsecrequest_level = isr->level; 1671105197Ssam xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1672105197Ssam 1673105197Ssam p += sizeof(*xisr); 1674105197Ssam bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1675105197Ssam p += isr->saidx.src.sa.sa_len; 1676105197Ssam bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1677105197Ssam p += isr->saidx.src.sa.sa_len; 1678105197Ssam 1679105197Ssam xisr->sadb_x_ipsecrequest_len = 1680105197Ssam PFKEY_ALIGN8(sizeof(*xisr) 1681105197Ssam + isr->saidx.src.sa.sa_len 1682105197Ssam + isr->saidx.dst.sa.sa_len); 1683105197Ssam } 1684105197Ssam } 1685105197Ssam 1686105197Ssam return m; 1687105197Ssam} 1688105197Ssam 1689105197Ssam/* m will not be freed nor modified */ 1690105197Ssamstatic struct mbuf * 1691105197Ssam#ifdef __STDC__ 1692105197Ssamkey_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1693105197Ssam int ndeep, int nitem, ...) 1694105197Ssam#else 1695105197Ssamkey_gather_mbuf(m, mhp, ndeep, nitem, va_alist) 1696105197Ssam struct mbuf *m; 1697105197Ssam const struct sadb_msghdr *mhp; 1698105197Ssam int ndeep; 1699105197Ssam int nitem; 1700105197Ssam va_dcl 1701105197Ssam#endif 1702105197Ssam{ 1703105197Ssam va_list ap; 1704105197Ssam int idx; 1705105197Ssam int i; 1706105197Ssam struct mbuf *result = NULL, *n; 1707105197Ssam int len; 1708105197Ssam 1709120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1710120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1711105197Ssam 1712105197Ssam va_start(ap, nitem); 1713105197Ssam for (i = 0; i < nitem; i++) { 1714105197Ssam idx = va_arg(ap, int); 1715105197Ssam if (idx < 0 || idx > SADB_EXT_MAX) 1716105197Ssam goto fail; 1717105197Ssam /* don't attempt to pull empty extension */ 1718105197Ssam if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1719105197Ssam continue; 1720105197Ssam if (idx != SADB_EXT_RESERVED && 1721105197Ssam (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1722105197Ssam continue; 1723105197Ssam 1724105197Ssam if (idx == SADB_EXT_RESERVED) { 1725105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1726120585Ssam 1727120585Ssam IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len)); 1728120585Ssam 1729111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 1730105197Ssam if (!n) 1731105197Ssam goto fail; 1732105197Ssam n->m_len = len; 1733105197Ssam n->m_next = NULL; 1734105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), 1735105197Ssam mtod(n, caddr_t)); 1736105197Ssam } else if (i < ndeep) { 1737105197Ssam len = mhp->extlen[idx]; 1738105197Ssam n = key_alloc_mbuf(len); 1739105197Ssam if (!n || n->m_next) { /*XXX*/ 1740105197Ssam if (n) 1741105197Ssam m_freem(n); 1742105197Ssam goto fail; 1743105197Ssam } 1744105197Ssam m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1745105197Ssam mtod(n, caddr_t)); 1746105197Ssam } else { 1747105197Ssam n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1748111119Simp M_DONTWAIT); 1749105197Ssam } 1750105197Ssam if (n == NULL) 1751105197Ssam goto fail; 1752105197Ssam 1753105197Ssam if (result) 1754105197Ssam m_cat(result, n); 1755105197Ssam else 1756105197Ssam result = n; 1757105197Ssam } 1758105197Ssam va_end(ap); 1759105197Ssam 1760105197Ssam if ((result->m_flags & M_PKTHDR) != 0) { 1761105197Ssam result->m_pkthdr.len = 0; 1762105197Ssam for (n = result; n; n = n->m_next) 1763105197Ssam result->m_pkthdr.len += n->m_len; 1764105197Ssam } 1765105197Ssam 1766105197Ssam return result; 1767105197Ssam 1768105197Ssamfail: 1769105197Ssam m_freem(result); 1770105197Ssam return NULL; 1771105197Ssam} 1772105197Ssam 1773105197Ssam/* 1774105197Ssam * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1775108533Sschweikh * add an entry to SP database, when received 1776105197Ssam * <base, address(SD), (lifetime(H),) policy> 1777105197Ssam * from the user(?). 1778105197Ssam * Adding to SP database, 1779105197Ssam * and send 1780105197Ssam * <base, address(SD), (lifetime(H),) policy> 1781105197Ssam * to the socket which was send. 1782105197Ssam * 1783105197Ssam * SPDADD set a unique policy entry. 1784105197Ssam * SPDSETIDX like SPDADD without a part of policy requests. 1785105197Ssam * SPDUPDATE replace a unique policy entry. 1786105197Ssam * 1787105197Ssam * m will always be freed. 1788105197Ssam */ 1789105197Ssamstatic int 1790105197Ssamkey_spdadd(so, m, mhp) 1791105197Ssam struct socket *so; 1792105197Ssam struct mbuf *m; 1793105197Ssam const struct sadb_msghdr *mhp; 1794105197Ssam{ 1795105197Ssam struct sadb_address *src0, *dst0; 1796105197Ssam struct sadb_x_policy *xpl0, *xpl; 1797105197Ssam struct sadb_lifetime *lft = NULL; 1798105197Ssam struct secpolicyindex spidx; 1799105197Ssam struct secpolicy *newsp; 1800105197Ssam int error; 1801105197Ssam 1802120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 1803120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1804120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1805120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 1806105197Ssam 1807105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1808105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1809105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1810105197Ssam ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1811105197Ssam return key_senderror(so, m, EINVAL); 1812105197Ssam } 1813105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1814105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1815105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1816120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1817120585Ssam __func__)); 1818105197Ssam return key_senderror(so, m, EINVAL); 1819105197Ssam } 1820105197Ssam if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1821105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1822105197Ssam < sizeof(struct sadb_lifetime)) { 1823120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1824120585Ssam __func__)); 1825105197Ssam return key_senderror(so, m, EINVAL); 1826105197Ssam } 1827105197Ssam lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1828105197Ssam } 1829105197Ssam 1830105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1831105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1832105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1833105197Ssam 1834194062Svanhu /* 1835194062Svanhu * Note: do not parse SADB_X_EXT_NAT_T_* here: 1836194062Svanhu * we are processing traffic endpoints. 1837194062Svanhu */ 1838194062Svanhu 1839105197Ssam /* make secindex */ 1840105197Ssam /* XXX boundary check against sa_len */ 1841105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1842105197Ssam src0 + 1, 1843105197Ssam dst0 + 1, 1844105197Ssam src0->sadb_address_prefixlen, 1845105197Ssam dst0->sadb_address_prefixlen, 1846105197Ssam src0->sadb_address_proto, 1847105197Ssam &spidx); 1848105197Ssam 1849105197Ssam /* checking the direciton. */ 1850105197Ssam switch (xpl0->sadb_x_policy_dir) { 1851105197Ssam case IPSEC_DIR_INBOUND: 1852105197Ssam case IPSEC_DIR_OUTBOUND: 1853105197Ssam break; 1854105197Ssam default: 1855120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 1856105197Ssam mhp->msg->sadb_msg_errno = EINVAL; 1857105197Ssam return 0; 1858105197Ssam } 1859105197Ssam 1860105197Ssam /* check policy */ 1861105197Ssam /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1862105197Ssam if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1863105197Ssam || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1864120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__)); 1865105197Ssam return key_senderror(so, m, EINVAL); 1866105197Ssam } 1867105197Ssam 1868105197Ssam /* policy requests are mandatory when action is ipsec. */ 1869105197Ssam if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1870105197Ssam && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1871105197Ssam && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1872120585Ssam ipseclog((LOG_DEBUG, "%s: some policy requests part required\n", 1873120585Ssam __func__)); 1874105197Ssam return key_senderror(so, m, EINVAL); 1875105197Ssam } 1876105197Ssam 1877105197Ssam /* 1878105197Ssam * checking there is SP already or not. 1879105197Ssam * SPDUPDATE doesn't depend on whether there is a SP or not. 1880105197Ssam * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1881105197Ssam * then error. 1882105197Ssam */ 1883105197Ssam newsp = key_getsp(&spidx); 1884105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1885105197Ssam if (newsp) { 1886206659Svanhu SPTREE_LOCK(); 1887105197Ssam newsp->state = IPSEC_SPSTATE_DEAD; 1888206659Svanhu SPTREE_UNLOCK(); 1889105197Ssam KEY_FREESP(&newsp); 1890105197Ssam } 1891105197Ssam } else { 1892105197Ssam if (newsp != NULL) { 1893105197Ssam KEY_FREESP(&newsp); 1894120585Ssam ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", 1895120585Ssam __func__)); 1896105197Ssam return key_senderror(so, m, EEXIST); 1897105197Ssam } 1898105197Ssam } 1899105197Ssam 1900105197Ssam /* allocation new SP entry */ 1901105197Ssam if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1902105197Ssam return key_senderror(so, m, error); 1903105197Ssam } 1904105197Ssam 1905105197Ssam if ((newsp->id = key_getnewspid()) == 0) { 1906119643Ssam _key_delsp(newsp); 1907105197Ssam return key_senderror(so, m, ENOBUFS); 1908105197Ssam } 1909105197Ssam 1910105197Ssam /* XXX boundary check against sa_len */ 1911105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1912105197Ssam src0 + 1, 1913105197Ssam dst0 + 1, 1914105197Ssam src0->sadb_address_prefixlen, 1915105197Ssam dst0->sadb_address_prefixlen, 1916105197Ssam src0->sadb_address_proto, 1917105197Ssam &newsp->spidx); 1918105197Ssam 1919105197Ssam /* sanity check on addr pair */ 1920105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_family != 1921105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_family) { 1922119643Ssam _key_delsp(newsp); 1923105197Ssam return key_senderror(so, m, EINVAL); 1924105197Ssam } 1925105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 1926105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_len) { 1927119643Ssam _key_delsp(newsp); 1928105197Ssam return key_senderror(so, m, EINVAL); 1929105197Ssam } 1930105197Ssam#if 1 1931197250Svanhu if (newsp->req && newsp->req->saidx.src.sa.sa_family && newsp->req->saidx.dst.sa.sa_family) { 1932197250Svanhu if (newsp->req->saidx.src.sa.sa_family != newsp->req->saidx.dst.sa.sa_family) { 1933119643Ssam _key_delsp(newsp); 1934105197Ssam return key_senderror(so, m, EINVAL); 1935105197Ssam } 1936105197Ssam } 1937105197Ssam#endif 1938105197Ssam 1939105197Ssam newsp->created = time_second; 1940105197Ssam newsp->lastused = newsp->created; 1941105197Ssam newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1942105197Ssam newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1943105197Ssam 1944105197Ssam newsp->refcnt = 1; /* do not reclaim until I say I do */ 1945105197Ssam newsp->state = IPSEC_SPSTATE_ALIVE; 1946181803Sbz LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1947105197Ssam 1948105197Ssam /* delete the entry in spacqtree */ 1949105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1950119643Ssam struct secspacq *spacq = key_getspacq(&spidx); 1951119643Ssam if (spacq != NULL) { 1952105197Ssam /* reset counter in order to deletion by timehandler. */ 1953105197Ssam spacq->created = time_second; 1954105197Ssam spacq->count = 0; 1955120585Ssam SPACQ_UNLOCK(); 1956105197Ssam } 1957105197Ssam } 1958105197Ssam 1959105197Ssam { 1960105197Ssam struct mbuf *n, *mpolicy; 1961105197Ssam struct sadb_msg *newmsg; 1962105197Ssam int off; 1963105197Ssam 1964194062Svanhu /* 1965194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 1966194062Svanhu * we are sending traffic endpoints. 1967194062Svanhu */ 1968194062Svanhu 1969105197Ssam /* create new sadb_msg to reply. */ 1970105197Ssam if (lft) { 1971105197Ssam n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1972105197Ssam SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1973105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1974105197Ssam } else { 1975105197Ssam n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1976105197Ssam SADB_X_EXT_POLICY, 1977105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1978105197Ssam } 1979105197Ssam if (!n) 1980105197Ssam return key_senderror(so, m, ENOBUFS); 1981105197Ssam 1982105197Ssam if (n->m_len < sizeof(*newmsg)) { 1983105197Ssam n = m_pullup(n, sizeof(*newmsg)); 1984105197Ssam if (!n) 1985105197Ssam return key_senderror(so, m, ENOBUFS); 1986105197Ssam } 1987105197Ssam newmsg = mtod(n, struct sadb_msg *); 1988105197Ssam newmsg->sadb_msg_errno = 0; 1989105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1990105197Ssam 1991105197Ssam off = 0; 1992105197Ssam mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1993105197Ssam sizeof(*xpl), &off); 1994105197Ssam if (mpolicy == NULL) { 1995105197Ssam /* n is already freed */ 1996105197Ssam return key_senderror(so, m, ENOBUFS); 1997105197Ssam } 1998105197Ssam xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 1999105197Ssam if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2000105197Ssam m_freem(n); 2001105197Ssam return key_senderror(so, m, EINVAL); 2002105197Ssam } 2003105197Ssam xpl->sadb_x_policy_id = newsp->id; 2004105197Ssam 2005105197Ssam m_freem(m); 2006105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2007105197Ssam } 2008105197Ssam} 2009105197Ssam 2010105197Ssam/* 2011105197Ssam * get new policy id. 2012105197Ssam * OUT: 2013105197Ssam * 0: failure. 2014105197Ssam * others: success. 2015105197Ssam */ 2016105197Ssamstatic u_int32_t 2017105197Ssamkey_getnewspid() 2018105197Ssam{ 2019105197Ssam u_int32_t newid = 0; 2020181803Sbz int count = V_key_spi_trycnt; /* XXX */ 2021105197Ssam struct secpolicy *sp; 2022105197Ssam 2023105197Ssam /* when requesting to allocate spi ranged */ 2024105197Ssam while (count--) { 2025181803Sbz newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1)); 2026105197Ssam 2027105197Ssam if ((sp = key_getspbyid(newid)) == NULL) 2028105197Ssam break; 2029105197Ssam 2030105197Ssam KEY_FREESP(&sp); 2031105197Ssam } 2032105197Ssam 2033105197Ssam if (count == 0 || newid == 0) { 2034120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", 2035120585Ssam __func__)); 2036105197Ssam return 0; 2037105197Ssam } 2038105197Ssam 2039105197Ssam return newid; 2040105197Ssam} 2041105197Ssam 2042105197Ssam/* 2043105197Ssam * SADB_SPDDELETE processing 2044105197Ssam * receive 2045105197Ssam * <base, address(SD), policy(*)> 2046105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2047105197Ssam * and send, 2048105197Ssam * <base, address(SD), policy(*)> 2049105197Ssam * to the ikmpd. 2050105197Ssam * policy(*) including direction of policy. 2051105197Ssam * 2052105197Ssam * m will always be freed. 2053105197Ssam */ 2054105197Ssamstatic int 2055105197Ssamkey_spddelete(so, m, mhp) 2056105197Ssam struct socket *so; 2057105197Ssam struct mbuf *m; 2058105197Ssam const struct sadb_msghdr *mhp; 2059105197Ssam{ 2060105197Ssam struct sadb_address *src0, *dst0; 2061105197Ssam struct sadb_x_policy *xpl0; 2062105197Ssam struct secpolicyindex spidx; 2063105197Ssam struct secpolicy *sp; 2064105197Ssam 2065120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 2066120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2067120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2068120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2069105197Ssam 2070105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2071105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2072105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2073120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2074120585Ssam __func__)); 2075105197Ssam return key_senderror(so, m, EINVAL); 2076105197Ssam } 2077105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2078105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2079105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2080120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2081120585Ssam __func__)); 2082105197Ssam return key_senderror(so, m, EINVAL); 2083105197Ssam } 2084105197Ssam 2085105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2086105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2087105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2088105197Ssam 2089194062Svanhu /* 2090194062Svanhu * Note: do not parse SADB_X_EXT_NAT_T_* here: 2091194062Svanhu * we are processing traffic endpoints. 2092194062Svanhu */ 2093194062Svanhu 2094105197Ssam /* make secindex */ 2095105197Ssam /* XXX boundary check against sa_len */ 2096105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2097105197Ssam src0 + 1, 2098105197Ssam dst0 + 1, 2099105197Ssam src0->sadb_address_prefixlen, 2100105197Ssam dst0->sadb_address_prefixlen, 2101105197Ssam src0->sadb_address_proto, 2102105197Ssam &spidx); 2103105197Ssam 2104105197Ssam /* checking the direciton. */ 2105105197Ssam switch (xpl0->sadb_x_policy_dir) { 2106105197Ssam case IPSEC_DIR_INBOUND: 2107105197Ssam case IPSEC_DIR_OUTBOUND: 2108105197Ssam break; 2109105197Ssam default: 2110120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 2111105197Ssam return key_senderror(so, m, EINVAL); 2112105197Ssam } 2113105197Ssam 2114105197Ssam /* Is there SP in SPD ? */ 2115105197Ssam if ((sp = key_getsp(&spidx)) == NULL) { 2116120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); 2117105197Ssam return key_senderror(so, m, EINVAL); 2118105197Ssam } 2119105197Ssam 2120105197Ssam /* save policy id to buffer to be returned. */ 2121105197Ssam xpl0->sadb_x_policy_id = sp->id; 2122105197Ssam 2123206659Svanhu SPTREE_LOCK(); 2124105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2125206659Svanhu SPTREE_UNLOCK(); 2126105197Ssam KEY_FREESP(&sp); 2127105197Ssam 2128105197Ssam { 2129105197Ssam struct mbuf *n; 2130105197Ssam struct sadb_msg *newmsg; 2131105197Ssam 2132194062Svanhu /* 2133194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 2134194062Svanhu * we are sending traffic endpoints. 2135194062Svanhu */ 2136194062Svanhu 2137105197Ssam /* create new sadb_msg to reply. */ 2138105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2139105197Ssam SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2140105197Ssam if (!n) 2141105197Ssam return key_senderror(so, m, ENOBUFS); 2142105197Ssam 2143105197Ssam newmsg = mtod(n, struct sadb_msg *); 2144105197Ssam newmsg->sadb_msg_errno = 0; 2145105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2146105197Ssam 2147105197Ssam m_freem(m); 2148105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2149105197Ssam } 2150105197Ssam} 2151105197Ssam 2152105197Ssam/* 2153105197Ssam * SADB_SPDDELETE2 processing 2154105197Ssam * receive 2155105197Ssam * <base, policy(*)> 2156105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2157105197Ssam * and send, 2158105197Ssam * <base, policy(*)> 2159105197Ssam * to the ikmpd. 2160105197Ssam * policy(*) including direction of policy. 2161105197Ssam * 2162105197Ssam * m will always be freed. 2163105197Ssam */ 2164105197Ssamstatic int 2165105197Ssamkey_spddelete2(so, m, mhp) 2166105197Ssam struct socket *so; 2167105197Ssam struct mbuf *m; 2168105197Ssam const struct sadb_msghdr *mhp; 2169105197Ssam{ 2170105197Ssam u_int32_t id; 2171105197Ssam struct secpolicy *sp; 2172105197Ssam 2173120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2174120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2175120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2176120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2177105197Ssam 2178105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2179105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2180120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); 2181170803Sbz return key_senderror(so, m, EINVAL); 2182105197Ssam } 2183105197Ssam 2184105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2185105197Ssam 2186105197Ssam /* Is there SP in SPD ? */ 2187105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2188120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2189170803Sbz return key_senderror(so, m, EINVAL); 2190105197Ssam } 2191105197Ssam 2192206659Svanhu SPTREE_LOCK(); 2193105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2194206659Svanhu SPTREE_UNLOCK(); 2195105197Ssam KEY_FREESP(&sp); 2196105197Ssam 2197105197Ssam { 2198105197Ssam struct mbuf *n, *nn; 2199105197Ssam struct sadb_msg *newmsg; 2200105197Ssam int off, len; 2201105197Ssam 2202105197Ssam /* create new sadb_msg to reply. */ 2203105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2204105197Ssam 2205111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 2206105197Ssam if (n && len > MHLEN) { 2207111119Simp MCLGET(n, M_DONTWAIT); 2208105197Ssam if ((n->m_flags & M_EXT) == 0) { 2209105197Ssam m_freem(n); 2210105197Ssam n = NULL; 2211105197Ssam } 2212105197Ssam } 2213105197Ssam if (!n) 2214105197Ssam return key_senderror(so, m, ENOBUFS); 2215105197Ssam 2216105197Ssam n->m_len = len; 2217105197Ssam n->m_next = NULL; 2218105197Ssam off = 0; 2219105197Ssam 2220105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2221105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2222105197Ssam 2223120585Ssam IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)", 2224120585Ssam off, len)); 2225105197Ssam 2226105197Ssam n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2227111119Simp mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2228105197Ssam if (!n->m_next) { 2229105197Ssam m_freem(n); 2230105197Ssam return key_senderror(so, m, ENOBUFS); 2231105197Ssam } 2232105197Ssam 2233105197Ssam n->m_pkthdr.len = 0; 2234105197Ssam for (nn = n; nn; nn = nn->m_next) 2235105197Ssam n->m_pkthdr.len += nn->m_len; 2236105197Ssam 2237105197Ssam newmsg = mtod(n, struct sadb_msg *); 2238105197Ssam newmsg->sadb_msg_errno = 0; 2239105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2240105197Ssam 2241105197Ssam m_freem(m); 2242105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2243105197Ssam } 2244105197Ssam} 2245105197Ssam 2246105197Ssam/* 2247105197Ssam * SADB_X_GET processing 2248105197Ssam * receive 2249105197Ssam * <base, policy(*)> 2250105197Ssam * from the user(?), 2251105197Ssam * and send, 2252105197Ssam * <base, address(SD), policy> 2253105197Ssam * to the ikmpd. 2254105197Ssam * policy(*) including direction of policy. 2255105197Ssam * 2256105197Ssam * m will always be freed. 2257105197Ssam */ 2258105197Ssamstatic int 2259105197Ssamkey_spdget(so, m, mhp) 2260105197Ssam struct socket *so; 2261105197Ssam struct mbuf *m; 2262105197Ssam const struct sadb_msghdr *mhp; 2263105197Ssam{ 2264105197Ssam u_int32_t id; 2265105197Ssam struct secpolicy *sp; 2266105197Ssam struct mbuf *n; 2267105197Ssam 2268120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2269120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2270120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2271120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2272105197Ssam 2273105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2274105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2275120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2276120585Ssam __func__)); 2277105197Ssam return key_senderror(so, m, EINVAL); 2278105197Ssam } 2279105197Ssam 2280105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2281105197Ssam 2282105197Ssam /* Is there SP in SPD ? */ 2283105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2284120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2285105197Ssam return key_senderror(so, m, ENOENT); 2286105197Ssam } 2287105197Ssam 2288105197Ssam n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2289105197Ssam if (n != NULL) { 2290105197Ssam m_freem(m); 2291105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2292105197Ssam } else 2293105197Ssam return key_senderror(so, m, ENOBUFS); 2294105197Ssam} 2295105197Ssam 2296105197Ssam/* 2297105197Ssam * SADB_X_SPDACQUIRE processing. 2298105197Ssam * Acquire policy and SA(s) for a *OUTBOUND* packet. 2299105197Ssam * send 2300105197Ssam * <base, policy(*)> 2301105197Ssam * to KMD, and expect to receive 2302105197Ssam * <base> with SADB_X_SPDACQUIRE if error occured, 2303105197Ssam * or 2304105197Ssam * <base, policy> 2305105197Ssam * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2306105197Ssam * policy(*) is without policy requests. 2307105197Ssam * 2308105197Ssam * 0 : succeed 2309105197Ssam * others: error number 2310105197Ssam */ 2311105197Ssamint 2312105197Ssamkey_spdacquire(sp) 2313105197Ssam struct secpolicy *sp; 2314105197Ssam{ 2315105197Ssam struct mbuf *result = NULL, *m; 2316105197Ssam struct secspacq *newspacq; 2317105197Ssam 2318120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2319120585Ssam IPSEC_ASSERT(sp->req == NULL, ("policy exists")); 2320120585Ssam IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 2321120585Ssam ("policy not IPSEC %u", sp->policy)); 2322105197Ssam 2323108533Sschweikh /* Get an entry to check whether sent message or not. */ 2324119643Ssam newspacq = key_getspacq(&sp->spidx); 2325119643Ssam if (newspacq != NULL) { 2326181803Sbz if (V_key_blockacq_count < newspacq->count) { 2327105197Ssam /* reset counter and do send message. */ 2328105197Ssam newspacq->count = 0; 2329105197Ssam } else { 2330105197Ssam /* increment counter and do nothing. */ 2331105197Ssam newspacq->count++; 2332105197Ssam return 0; 2333105197Ssam } 2334120585Ssam SPACQ_UNLOCK(); 2335105197Ssam } else { 2336105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 2337119643Ssam newspacq = key_newspacq(&sp->spidx); 2338119643Ssam if (newspacq == NULL) 2339105197Ssam return ENOBUFS; 2340105197Ssam } 2341105197Ssam 2342105197Ssam /* create new sadb_msg to reply. */ 2343105197Ssam m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2344170805Sbz if (!m) 2345170805Sbz return ENOBUFS; 2346170805Sbz 2347105197Ssam result = m; 2348105197Ssam 2349105197Ssam result->m_pkthdr.len = 0; 2350105197Ssam for (m = result; m; m = m->m_next) 2351105197Ssam result->m_pkthdr.len += m->m_len; 2352105197Ssam 2353105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2354105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2355105197Ssam 2356105197Ssam return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2357105197Ssam} 2358105197Ssam 2359105197Ssam/* 2360105197Ssam * SADB_SPDFLUSH processing 2361105197Ssam * receive 2362105197Ssam * <base> 2363105197Ssam * from the user, and free all entries in secpctree. 2364105197Ssam * and send, 2365105197Ssam * <base> 2366105197Ssam * to the user. 2367105197Ssam * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2368105197Ssam * 2369105197Ssam * m will always be freed. 2370105197Ssam */ 2371105197Ssamstatic int 2372105197Ssamkey_spdflush(so, m, mhp) 2373105197Ssam struct socket *so; 2374105197Ssam struct mbuf *m; 2375105197Ssam const struct sadb_msghdr *mhp; 2376105197Ssam{ 2377105197Ssam struct sadb_msg *newmsg; 2378105197Ssam struct secpolicy *sp; 2379105197Ssam u_int dir; 2380105197Ssam 2381120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2382120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2383120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2384120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2385105197Ssam 2386105197Ssam if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2387105197Ssam return key_senderror(so, m, EINVAL); 2388105197Ssam 2389105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2390120585Ssam SPTREE_LOCK(); 2391181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) 2392105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2393120585Ssam SPTREE_UNLOCK(); 2394105197Ssam } 2395105197Ssam 2396105197Ssam if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2397120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2398105197Ssam return key_senderror(so, m, ENOBUFS); 2399105197Ssam } 2400105197Ssam 2401105197Ssam if (m->m_next) 2402105197Ssam m_freem(m->m_next); 2403105197Ssam m->m_next = NULL; 2404105197Ssam m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2405105197Ssam newmsg = mtod(m, struct sadb_msg *); 2406105197Ssam newmsg->sadb_msg_errno = 0; 2407105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2408105197Ssam 2409105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2410105197Ssam} 2411105197Ssam 2412105197Ssam/* 2413105197Ssam * SADB_SPDDUMP processing 2414105197Ssam * receive 2415105197Ssam * <base> 2416105197Ssam * from the user, and dump all SP leaves 2417105197Ssam * and send, 2418105197Ssam * <base> ..... 2419105197Ssam * to the ikmpd. 2420105197Ssam * 2421105197Ssam * m will always be freed. 2422105197Ssam */ 2423105197Ssamstatic int 2424105197Ssamkey_spddump(so, m, mhp) 2425105197Ssam struct socket *so; 2426105197Ssam struct mbuf *m; 2427105197Ssam const struct sadb_msghdr *mhp; 2428105197Ssam{ 2429105197Ssam struct secpolicy *sp; 2430105197Ssam int cnt; 2431105197Ssam u_int dir; 2432105197Ssam struct mbuf *n; 2433105197Ssam 2434120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2435120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2436120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2437120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2438105197Ssam 2439105197Ssam /* search SPD entry and get buffer size. */ 2440105197Ssam cnt = 0; 2441192882Svanhu SPTREE_LOCK(); 2442105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2443181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2444105197Ssam cnt++; 2445105197Ssam } 2446105197Ssam } 2447105197Ssam 2448192882Svanhu if (cnt == 0) { 2449192882Svanhu SPTREE_UNLOCK(); 2450105197Ssam return key_senderror(so, m, ENOENT); 2451192882Svanhu } 2452105197Ssam 2453105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2454181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2455105197Ssam --cnt; 2456105197Ssam n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2457105197Ssam mhp->msg->sadb_msg_pid); 2458105197Ssam 2459105197Ssam if (n) 2460105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2461105197Ssam } 2462105197Ssam } 2463105197Ssam 2464192882Svanhu SPTREE_UNLOCK(); 2465105197Ssam m_freem(m); 2466105197Ssam return 0; 2467105197Ssam} 2468105197Ssam 2469105197Ssamstatic struct mbuf * 2470189004Srdivackykey_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) 2471105197Ssam{ 2472105197Ssam struct mbuf *result = NULL, *m; 2473181330Svanhu struct seclifetime lt; 2474105197Ssam 2475105197Ssam m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2476105197Ssam if (!m) 2477105197Ssam goto fail; 2478105197Ssam result = m; 2479105197Ssam 2480194062Svanhu /* 2481194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 2482194062Svanhu * we are sending traffic endpoints. 2483194062Svanhu */ 2484105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2485105197Ssam &sp->spidx.src.sa, sp->spidx.prefs, 2486105197Ssam sp->spidx.ul_proto); 2487105197Ssam if (!m) 2488105197Ssam goto fail; 2489105197Ssam m_cat(result, m); 2490105197Ssam 2491105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2492105197Ssam &sp->spidx.dst.sa, sp->spidx.prefd, 2493105197Ssam sp->spidx.ul_proto); 2494105197Ssam if (!m) 2495105197Ssam goto fail; 2496105197Ssam m_cat(result, m); 2497105197Ssam 2498105197Ssam m = key_sp2msg(sp); 2499105197Ssam if (!m) 2500105197Ssam goto fail; 2501105197Ssam m_cat(result, m); 2502105197Ssam 2503181330Svanhu if(sp->lifetime){ 2504181330Svanhu lt.addtime=sp->created; 2505181330Svanhu lt.usetime= sp->lastused; 2506181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT); 2507181330Svanhu if (!m) 2508181330Svanhu goto fail; 2509181330Svanhu m_cat(result, m); 2510181330Svanhu 2511181330Svanhu lt.addtime=sp->lifetime; 2512181330Svanhu lt.usetime= sp->validtime; 2513181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD); 2514181330Svanhu if (!m) 2515181330Svanhu goto fail; 2516181330Svanhu m_cat(result, m); 2517181330Svanhu } 2518181330Svanhu 2519105197Ssam if ((result->m_flags & M_PKTHDR) == 0) 2520105197Ssam goto fail; 2521105197Ssam 2522105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2523105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2524105197Ssam if (result == NULL) 2525105197Ssam goto fail; 2526105197Ssam } 2527105197Ssam 2528105197Ssam result->m_pkthdr.len = 0; 2529105197Ssam for (m = result; m; m = m->m_next) 2530105197Ssam result->m_pkthdr.len += m->m_len; 2531105197Ssam 2532105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2533105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2534105197Ssam 2535105197Ssam return result; 2536105197Ssam 2537105197Ssamfail: 2538105197Ssam m_freem(result); 2539105197Ssam return NULL; 2540105197Ssam} 2541105197Ssam 2542105197Ssam/* 2543105197Ssam * get PFKEY message length for security policy and request. 2544105197Ssam */ 2545105197Ssamstatic u_int 2546105197Ssamkey_getspreqmsglen(sp) 2547105197Ssam struct secpolicy *sp; 2548105197Ssam{ 2549105197Ssam u_int tlen; 2550105197Ssam 2551105197Ssam tlen = sizeof(struct sadb_x_policy); 2552105197Ssam 2553105197Ssam /* if is the policy for ipsec ? */ 2554105197Ssam if (sp->policy != IPSEC_POLICY_IPSEC) 2555105197Ssam return tlen; 2556105197Ssam 2557105197Ssam /* get length of ipsec requests */ 2558105197Ssam { 2559105197Ssam struct ipsecrequest *isr; 2560105197Ssam int len; 2561105197Ssam 2562105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 2563105197Ssam len = sizeof(struct sadb_x_ipsecrequest) 2564105197Ssam + isr->saidx.src.sa.sa_len 2565105197Ssam + isr->saidx.dst.sa.sa_len; 2566105197Ssam 2567105197Ssam tlen += PFKEY_ALIGN8(len); 2568105197Ssam } 2569105197Ssam } 2570105197Ssam 2571105197Ssam return tlen; 2572105197Ssam} 2573105197Ssam 2574105197Ssam/* 2575105197Ssam * SADB_SPDEXPIRE processing 2576105197Ssam * send 2577105197Ssam * <base, address(SD), lifetime(CH), policy> 2578105197Ssam * to KMD by PF_KEY. 2579105197Ssam * 2580105197Ssam * OUT: 0 : succeed 2581105197Ssam * others : error number 2582105197Ssam */ 2583105197Ssamstatic int 2584105197Ssamkey_spdexpire(sp) 2585105197Ssam struct secpolicy *sp; 2586105197Ssam{ 2587105197Ssam struct mbuf *result = NULL, *m; 2588105197Ssam int len; 2589105197Ssam int error = -1; 2590105197Ssam struct sadb_lifetime *lt; 2591105197Ssam 2592105197Ssam /* XXX: Why do we lock ? */ 2593105197Ssam 2594120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2595105197Ssam 2596105197Ssam /* set msg header */ 2597105197Ssam m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2598105197Ssam if (!m) { 2599105197Ssam error = ENOBUFS; 2600105197Ssam goto fail; 2601105197Ssam } 2602105197Ssam result = m; 2603105197Ssam 2604105197Ssam /* create lifetime extension (current and hard) */ 2605105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2606105197Ssam m = key_alloc_mbuf(len); 2607105197Ssam if (!m || m->m_next) { /*XXX*/ 2608105197Ssam if (m) 2609105197Ssam m_freem(m); 2610105197Ssam error = ENOBUFS; 2611105197Ssam goto fail; 2612105197Ssam } 2613105197Ssam bzero(mtod(m, caddr_t), len); 2614105197Ssam lt = mtod(m, struct sadb_lifetime *); 2615105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2616105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2617105197Ssam lt->sadb_lifetime_allocations = 0; 2618105197Ssam lt->sadb_lifetime_bytes = 0; 2619105197Ssam lt->sadb_lifetime_addtime = sp->created; 2620105197Ssam lt->sadb_lifetime_usetime = sp->lastused; 2621105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2622105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2623105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2624105197Ssam lt->sadb_lifetime_allocations = 0; 2625105197Ssam lt->sadb_lifetime_bytes = 0; 2626105197Ssam lt->sadb_lifetime_addtime = sp->lifetime; 2627105197Ssam lt->sadb_lifetime_usetime = sp->validtime; 2628105197Ssam m_cat(result, m); 2629105197Ssam 2630194062Svanhu /* 2631194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 2632194062Svanhu * we are sending traffic endpoints. 2633194062Svanhu */ 2634194062Svanhu 2635105197Ssam /* set sadb_address for source */ 2636105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2637105197Ssam &sp->spidx.src.sa, 2638105197Ssam sp->spidx.prefs, sp->spidx.ul_proto); 2639105197Ssam if (!m) { 2640105197Ssam error = ENOBUFS; 2641105197Ssam goto fail; 2642105197Ssam } 2643105197Ssam m_cat(result, m); 2644105197Ssam 2645105197Ssam /* set sadb_address for destination */ 2646105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2647105197Ssam &sp->spidx.dst.sa, 2648105197Ssam sp->spidx.prefd, sp->spidx.ul_proto); 2649105197Ssam if (!m) { 2650105197Ssam error = ENOBUFS; 2651105197Ssam goto fail; 2652105197Ssam } 2653105197Ssam m_cat(result, m); 2654105197Ssam 2655105197Ssam /* set secpolicy */ 2656105197Ssam m = key_sp2msg(sp); 2657105197Ssam if (!m) { 2658105197Ssam error = ENOBUFS; 2659105197Ssam goto fail; 2660105197Ssam } 2661105197Ssam m_cat(result, m); 2662105197Ssam 2663105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 2664105197Ssam error = EINVAL; 2665105197Ssam goto fail; 2666105197Ssam } 2667105197Ssam 2668105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2669105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2670105197Ssam if (result == NULL) { 2671105197Ssam error = ENOBUFS; 2672105197Ssam goto fail; 2673105197Ssam } 2674105197Ssam } 2675105197Ssam 2676105197Ssam result->m_pkthdr.len = 0; 2677105197Ssam for (m = result; m; m = m->m_next) 2678105197Ssam result->m_pkthdr.len += m->m_len; 2679105197Ssam 2680105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2681105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2682105197Ssam 2683105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2684105197Ssam 2685105197Ssam fail: 2686105197Ssam if (result) 2687105197Ssam m_freem(result); 2688105197Ssam return error; 2689105197Ssam} 2690105197Ssam 2691105197Ssam/* %%% SAD management */ 2692105197Ssam/* 2693105197Ssam * allocating a memory for new SA head, and copy from the values of mhp. 2694105197Ssam * OUT: NULL : failure due to the lack of memory. 2695105197Ssam * others : pointer to new SA head. 2696105197Ssam */ 2697105197Ssamstatic struct secashead * 2698105197Ssamkey_newsah(saidx) 2699105197Ssam struct secasindex *saidx; 2700105197Ssam{ 2701105197Ssam struct secashead *newsah; 2702105197Ssam 2703120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2704105197Ssam 2705119643Ssam newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2706105197Ssam if (newsah != NULL) { 2707105197Ssam int i; 2708105197Ssam for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2709105197Ssam LIST_INIT(&newsah->savtree[i]); 2710105197Ssam newsah->saidx = *saidx; 2711105197Ssam 2712105197Ssam /* add to saidxtree */ 2713105197Ssam newsah->state = SADB_SASTATE_MATURE; 2714119643Ssam 2715120585Ssam SAHTREE_LOCK(); 2716181803Sbz LIST_INSERT_HEAD(&V_sahtree, newsah, chain); 2717120585Ssam SAHTREE_UNLOCK(); 2718105197Ssam } 2719105197Ssam return(newsah); 2720105197Ssam} 2721105197Ssam 2722105197Ssam/* 2723105197Ssam * delete SA index and all SA registerd. 2724105197Ssam */ 2725105197Ssamstatic void 2726105197Ssamkey_delsah(sah) 2727105197Ssam struct secashead *sah; 2728105197Ssam{ 2729105197Ssam struct secasvar *sav, *nextsav; 2730120585Ssam u_int stateidx; 2731105197Ssam int zombie = 0; 2732105197Ssam 2733120585Ssam IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2734120585Ssam SAHTREE_LOCK_ASSERT(); 2735105197Ssam 2736105197Ssam /* searching all SA registerd in the secindex. */ 2737105197Ssam for (stateidx = 0; 2738185348Szec stateidx < _ARRAYLEN(saorder_state_any); 2739105197Ssam stateidx++) { 2740185348Szec u_int state = saorder_state_any[stateidx]; 2741120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2742105197Ssam if (sav->refcnt == 0) { 2743105197Ssam /* sanity check */ 2744120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 2745190071Svanhu /* 2746190071Svanhu * do NOT call KEY_FREESAV here: 2747190071Svanhu * it will only delete the sav if refcnt == 1, 2748189962Svanhu * where we already know that refcnt == 0 2749189962Svanhu */ 2750189962Svanhu key_delsav(sav); 2751105197Ssam } else { 2752105197Ssam /* give up to delete this sa */ 2753105197Ssam zombie++; 2754105197Ssam } 2755105197Ssam } 2756105197Ssam } 2757120585Ssam if (!zombie) { /* delete only if there are savs */ 2758120585Ssam /* remove from tree of SA index */ 2759120585Ssam if (__LIST_CHAINED(sah)) 2760120585Ssam LIST_REMOVE(sah, chain); 2761120585Ssam if (sah->sa_route.ro_rt) { 2762120585Ssam RTFREE(sah->sa_route.ro_rt); 2763120585Ssam sah->sa_route.ro_rt = (struct rtentry *)NULL; 2764120585Ssam } 2765120585Ssam free(sah, M_IPSEC_SAH); 2766105197Ssam } 2767105197Ssam} 2768105197Ssam 2769105197Ssam/* 2770105197Ssam * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2771105197Ssam * and copy the values of mhp into new buffer. 2772105197Ssam * When SAD message type is GETSPI: 2773105197Ssam * to set sequence number from acq_seq++, 2774105197Ssam * to set zero to SPI. 2775105197Ssam * not to call key_setsava(). 2776105197Ssam * OUT: NULL : fail 2777105197Ssam * others : pointer to new secasvar. 2778105197Ssam * 2779105197Ssam * does not modify mbuf. does not free mbuf on error. 2780105197Ssam */ 2781105197Ssamstatic struct secasvar * 2782105197Ssamkey_newsav(m, mhp, sah, errp, where, tag) 2783105197Ssam struct mbuf *m; 2784105197Ssam const struct sadb_msghdr *mhp; 2785105197Ssam struct secashead *sah; 2786105197Ssam int *errp; 2787105197Ssam const char* where; 2788105197Ssam int tag; 2789105197Ssam{ 2790105197Ssam struct secasvar *newsav; 2791105197Ssam const struct sadb_sa *xsa; 2792105197Ssam 2793120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2794120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2795120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2796120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 2797105197Ssam 2798119643Ssam newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2799105197Ssam if (newsav == NULL) { 2800120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2801105197Ssam *errp = ENOBUFS; 2802105197Ssam goto done; 2803105197Ssam } 2804105197Ssam 2805105197Ssam switch (mhp->msg->sadb_msg_type) { 2806105197Ssam case SADB_GETSPI: 2807105197Ssam newsav->spi = 0; 2808105197Ssam 2809105197Ssam#ifdef IPSEC_DOSEQCHECK 2810105197Ssam /* sync sequence number */ 2811105197Ssam if (mhp->msg->sadb_msg_seq == 0) 2812105197Ssam newsav->seq = 2813181803Sbz (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); 2814105197Ssam else 2815105197Ssam#endif 2816105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2817105197Ssam break; 2818105197Ssam 2819105197Ssam case SADB_ADD: 2820105197Ssam /* sanity check */ 2821105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 2822119643Ssam free(newsav, M_IPSEC_SA); 2823119643Ssam newsav = NULL; 2824120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2825120585Ssam __func__)); 2826105197Ssam *errp = EINVAL; 2827105197Ssam goto done; 2828105197Ssam } 2829105197Ssam xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2830105197Ssam newsav->spi = xsa->sadb_sa_spi; 2831105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2832105197Ssam break; 2833105197Ssam default: 2834119643Ssam free(newsav, M_IPSEC_SA); 2835119643Ssam newsav = NULL; 2836105197Ssam *errp = EINVAL; 2837105197Ssam goto done; 2838105197Ssam } 2839105197Ssam 2840119643Ssam 2841105197Ssam /* copy sav values */ 2842105197Ssam if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2843105197Ssam *errp = key_setsaval(newsav, m, mhp); 2844105197Ssam if (*errp) { 2845119643Ssam free(newsav, M_IPSEC_SA); 2846119643Ssam newsav = NULL; 2847105197Ssam goto done; 2848105197Ssam } 2849105197Ssam } 2850105197Ssam 2851120585Ssam SECASVAR_LOCK_INIT(newsav); 2852119643Ssam 2853105197Ssam /* reset created */ 2854105197Ssam newsav->created = time_second; 2855105197Ssam newsav->pid = mhp->msg->sadb_msg_pid; 2856105197Ssam 2857105197Ssam /* add to satree */ 2858105197Ssam newsav->sah = sah; 2859158767Spjd sa_initref(newsav); 2860105197Ssam newsav->state = SADB_SASTATE_LARVAL; 2861119643Ssam 2862199398Svanhu SAHTREE_LOCK(); 2863105197Ssam LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2864105197Ssam secasvar, chain); 2865199398Svanhu SAHTREE_UNLOCK(); 2866105197Ssamdone: 2867105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2868120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 2869105197Ssam where, tag, newsav)); 2870105197Ssam 2871105197Ssam return newsav; 2872105197Ssam} 2873105197Ssam 2874105197Ssam/* 2875105197Ssam * free() SA variable entry. 2876105197Ssam */ 2877105197Ssamstatic void 2878119643Ssamkey_cleansav(struct secasvar *sav) 2879105197Ssam{ 2880117051Ssam /* 2881117051Ssam * Cleanup xform state. Note that zeroize'ing causes the 2882117051Ssam * keys to be cleared; otherwise we must do it ourself. 2883117051Ssam */ 2884117051Ssam if (sav->tdb_xform != NULL) { 2885117051Ssam sav->tdb_xform->xf_zeroize(sav); 2886117051Ssam sav->tdb_xform = NULL; 2887117051Ssam } else { 2888120585Ssam KASSERT(sav->iv == NULL, ("iv but no xform")); 2889117051Ssam if (sav->key_auth != NULL) 2890157123Sgnn bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); 2891117051Ssam if (sav->key_enc != NULL) 2892157123Sgnn bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc)); 2893117051Ssam } 2894105197Ssam if (sav->key_auth != NULL) { 2895157123Sgnn if (sav->key_auth->key_data != NULL) 2896157123Sgnn free(sav->key_auth->key_data, M_IPSEC_MISC); 2897119643Ssam free(sav->key_auth, M_IPSEC_MISC); 2898105197Ssam sav->key_auth = NULL; 2899105197Ssam } 2900105197Ssam if (sav->key_enc != NULL) { 2901157123Sgnn if (sav->key_enc->key_data != NULL) 2902157123Sgnn free(sav->key_enc->key_data, M_IPSEC_MISC); 2903119643Ssam free(sav->key_enc, M_IPSEC_MISC); 2904105197Ssam sav->key_enc = NULL; 2905105197Ssam } 2906105197Ssam if (sav->sched) { 2907105197Ssam bzero(sav->sched, sav->schedlen); 2908119643Ssam free(sav->sched, M_IPSEC_MISC); 2909105197Ssam sav->sched = NULL; 2910105197Ssam } 2911105197Ssam if (sav->replay != NULL) { 2912119643Ssam free(sav->replay, M_IPSEC_MISC); 2913105197Ssam sav->replay = NULL; 2914105197Ssam } 2915105197Ssam if (sav->lft_c != NULL) { 2916119643Ssam free(sav->lft_c, M_IPSEC_MISC); 2917105197Ssam sav->lft_c = NULL; 2918105197Ssam } 2919105197Ssam if (sav->lft_h != NULL) { 2920119643Ssam free(sav->lft_h, M_IPSEC_MISC); 2921105197Ssam sav->lft_h = NULL; 2922105197Ssam } 2923105197Ssam if (sav->lft_s != NULL) { 2924119643Ssam free(sav->lft_s, M_IPSEC_MISC); 2925105197Ssam sav->lft_s = NULL; 2926105197Ssam } 2927119643Ssam} 2928105197Ssam 2929119643Ssam/* 2930119643Ssam * free() SA variable entry. 2931119643Ssam */ 2932119643Ssamstatic void 2933119643Ssamkey_delsav(sav) 2934119643Ssam struct secasvar *sav; 2935119643Ssam{ 2936120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 2937120585Ssam IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2938105197Ssam 2939119643Ssam /* remove from SA header */ 2940119643Ssam if (__LIST_CHAINED(sav)) 2941119643Ssam LIST_REMOVE(sav, chain); 2942119643Ssam key_cleansav(sav); 2943120585Ssam SECASVAR_LOCK_DESTROY(sav); 2944119643Ssam free(sav, M_IPSEC_SA); 2945105197Ssam} 2946105197Ssam 2947105197Ssam/* 2948105197Ssam * search SAD. 2949105197Ssam * OUT: 2950105197Ssam * NULL : not found 2951105197Ssam * others : found, pointer to a SA. 2952105197Ssam */ 2953105197Ssamstatic struct secashead * 2954105197Ssamkey_getsah(saidx) 2955105197Ssam struct secasindex *saidx; 2956105197Ssam{ 2957105197Ssam struct secashead *sah; 2958105197Ssam 2959120585Ssam SAHTREE_LOCK(); 2960181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2961105197Ssam if (sah->state == SADB_SASTATE_DEAD) 2962105197Ssam continue; 2963105197Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2964119643Ssam break; 2965105197Ssam } 2966120585Ssam SAHTREE_UNLOCK(); 2967105197Ssam 2968119643Ssam return sah; 2969105197Ssam} 2970105197Ssam 2971105197Ssam/* 2972105197Ssam * check not to be duplicated SPI. 2973105197Ssam * NOTE: this function is too slow due to searching all SAD. 2974105197Ssam * OUT: 2975105197Ssam * NULL : not found 2976105197Ssam * others : found, pointer to a SA. 2977105197Ssam */ 2978105197Ssamstatic struct secasvar * 2979105197Ssamkey_checkspidup(saidx, spi) 2980105197Ssam struct secasindex *saidx; 2981105197Ssam u_int32_t spi; 2982105197Ssam{ 2983105197Ssam struct secashead *sah; 2984105197Ssam struct secasvar *sav; 2985105197Ssam 2986105197Ssam /* check address family */ 2987105197Ssam if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2988120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2989120585Ssam __func__)); 2990105197Ssam return NULL; 2991105197Ssam } 2992105197Ssam 2993119643Ssam sav = NULL; 2994105197Ssam /* check all SAD */ 2995120585Ssam SAHTREE_LOCK(); 2996181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2997105197Ssam if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 2998105197Ssam continue; 2999105197Ssam sav = key_getsavbyspi(sah, spi); 3000105197Ssam if (sav != NULL) 3001119643Ssam break; 3002105197Ssam } 3003120585Ssam SAHTREE_UNLOCK(); 3004105197Ssam 3005119643Ssam return sav; 3006105197Ssam} 3007105197Ssam 3008105197Ssam/* 3009105197Ssam * search SAD litmited alive SA, protocol, SPI. 3010105197Ssam * OUT: 3011105197Ssam * NULL : not found 3012105197Ssam * others : found, pointer to a SA. 3013105197Ssam */ 3014105197Ssamstatic struct secasvar * 3015105197Ssamkey_getsavbyspi(sah, spi) 3016105197Ssam struct secashead *sah; 3017105197Ssam u_int32_t spi; 3018105197Ssam{ 3019105197Ssam struct secasvar *sav; 3020105197Ssam u_int stateidx, state; 3021105197Ssam 3022119643Ssam sav = NULL; 3023120585Ssam SAHTREE_LOCK_ASSERT(); 3024105197Ssam /* search all status */ 3025105197Ssam for (stateidx = 0; 3026185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 3027105197Ssam stateidx++) { 3028105197Ssam 3029185348Szec state = saorder_state_alive[stateidx]; 3030105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 3031105197Ssam 3032105197Ssam /* sanity check */ 3033105197Ssam if (sav->state != state) { 3034120585Ssam ipseclog((LOG_DEBUG, "%s: " 3035105197Ssam "invalid sav->state (queue: %d SA: %d)\n", 3036120585Ssam __func__, state, sav->state)); 3037105197Ssam continue; 3038105197Ssam } 3039105197Ssam 3040105197Ssam if (sav->spi == spi) 3041128859Ssam return sav; 3042105197Ssam } 3043105197Ssam } 3044105197Ssam 3045128859Ssam return NULL; 3046105197Ssam} 3047105197Ssam 3048105197Ssam/* 3049105197Ssam * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3050105197Ssam * You must update these if need. 3051105197Ssam * OUT: 0: success. 3052105197Ssam * !0: failure. 3053105197Ssam * 3054105197Ssam * does not modify mbuf. does not free mbuf on error. 3055105197Ssam */ 3056105197Ssamstatic int 3057105197Ssamkey_setsaval(sav, m, mhp) 3058105197Ssam struct secasvar *sav; 3059105197Ssam struct mbuf *m; 3060105197Ssam const struct sadb_msghdr *mhp; 3061105197Ssam{ 3062105197Ssam int error = 0; 3063105197Ssam 3064120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 3065120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 3066120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 3067105197Ssam 3068105197Ssam /* initialization */ 3069105197Ssam sav->replay = NULL; 3070105197Ssam sav->key_auth = NULL; 3071105197Ssam sav->key_enc = NULL; 3072105197Ssam sav->sched = NULL; 3073105197Ssam sav->schedlen = 0; 3074105197Ssam sav->iv = NULL; 3075105197Ssam sav->lft_c = NULL; 3076105197Ssam sav->lft_h = NULL; 3077105197Ssam sav->lft_s = NULL; 3078105197Ssam sav->tdb_xform = NULL; /* transform */ 3079105197Ssam sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3080105197Ssam sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3081105197Ssam sav->tdb_compalgxform = NULL; /* compression algorithm */ 3082194062Svanhu /* Initialize even if NAT-T not compiled in: */ 3083194062Svanhu sav->natt_type = 0; 3084194062Svanhu sav->natt_esp_frag_len = 0; 3085105197Ssam 3086105197Ssam /* SA */ 3087105197Ssam if (mhp->ext[SADB_EXT_SA] != NULL) { 3088105197Ssam const struct sadb_sa *sa0; 3089105197Ssam 3090105197Ssam sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3091105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3092105197Ssam error = EINVAL; 3093105197Ssam goto fail; 3094105197Ssam } 3095105197Ssam 3096105197Ssam sav->alg_auth = sa0->sadb_sa_auth; 3097105197Ssam sav->alg_enc = sa0->sadb_sa_encrypt; 3098105197Ssam sav->flags = sa0->sadb_sa_flags; 3099105197Ssam 3100105197Ssam /* replay window */ 3101105197Ssam if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3102105197Ssam sav->replay = (struct secreplay *) 3103119643Ssam malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 3104105197Ssam if (sav->replay == NULL) { 3105120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3106120585Ssam __func__)); 3107105197Ssam error = ENOBUFS; 3108105197Ssam goto fail; 3109105197Ssam } 3110105197Ssam if (sa0->sadb_sa_replay != 0) 3111105197Ssam sav->replay->bitmap = (caddr_t)(sav->replay+1); 3112105197Ssam sav->replay->wsize = sa0->sadb_sa_replay; 3113105197Ssam } 3114105197Ssam } 3115105197Ssam 3116105197Ssam /* Authentication keys */ 3117105197Ssam if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3118105197Ssam const struct sadb_key *key0; 3119105197Ssam int len; 3120105197Ssam 3121105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3122105197Ssam len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3123105197Ssam 3124105197Ssam error = 0; 3125105197Ssam if (len < sizeof(*key0)) { 3126105197Ssam error = EINVAL; 3127105197Ssam goto fail; 3128105197Ssam } 3129105197Ssam switch (mhp->msg->sadb_msg_satype) { 3130105197Ssam case SADB_SATYPE_AH: 3131105197Ssam case SADB_SATYPE_ESP: 3132125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3133105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3134105197Ssam sav->alg_auth != SADB_X_AALG_NULL) 3135105197Ssam error = EINVAL; 3136105197Ssam break; 3137105197Ssam case SADB_X_SATYPE_IPCOMP: 3138105197Ssam default: 3139105197Ssam error = EINVAL; 3140105197Ssam break; 3141105197Ssam } 3142105197Ssam if (error) { 3143120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3144120585Ssam __func__)); 3145105197Ssam goto fail; 3146105197Ssam } 3147105197Ssam 3148157123Sgnn sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, 3149157123Sgnn M_IPSEC_MISC); 3150157123Sgnn if (sav->key_auth == NULL ) { 3151157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3152157123Sgnn __func__)); 3153105197Ssam error = ENOBUFS; 3154105197Ssam goto fail; 3155105197Ssam } 3156105197Ssam } 3157105197Ssam 3158105197Ssam /* Encryption key */ 3159105197Ssam if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3160105197Ssam const struct sadb_key *key0; 3161105197Ssam int len; 3162105197Ssam 3163105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3164105197Ssam len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3165105197Ssam 3166105197Ssam error = 0; 3167105197Ssam if (len < sizeof(*key0)) { 3168105197Ssam error = EINVAL; 3169105197Ssam goto fail; 3170105197Ssam } 3171105197Ssam switch (mhp->msg->sadb_msg_satype) { 3172105197Ssam case SADB_SATYPE_ESP: 3173105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3174105197Ssam sav->alg_enc != SADB_EALG_NULL) { 3175105197Ssam error = EINVAL; 3176105197Ssam break; 3177105197Ssam } 3178157123Sgnn sav->key_enc = (struct seckey *)key_dup_keymsg(key0, 3179157123Sgnn len, 3180157123Sgnn M_IPSEC_MISC); 3181105197Ssam if (sav->key_enc == NULL) { 3182120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3183120585Ssam __func__)); 3184105197Ssam error = ENOBUFS; 3185105197Ssam goto fail; 3186105197Ssam } 3187105197Ssam break; 3188105197Ssam case SADB_X_SATYPE_IPCOMP: 3189105197Ssam if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3190105197Ssam error = EINVAL; 3191105197Ssam sav->key_enc = NULL; /*just in case*/ 3192105197Ssam break; 3193105197Ssam case SADB_SATYPE_AH: 3194125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3195105197Ssam default: 3196105197Ssam error = EINVAL; 3197105197Ssam break; 3198105197Ssam } 3199105197Ssam if (error) { 3200120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3201120585Ssam __func__)); 3202105197Ssam goto fail; 3203105197Ssam } 3204105197Ssam } 3205105197Ssam 3206105197Ssam /* set iv */ 3207105197Ssam sav->ivlen = 0; 3208105197Ssam 3209105197Ssam switch (mhp->msg->sadb_msg_satype) { 3210105197Ssam case SADB_SATYPE_AH: 3211105197Ssam error = xform_init(sav, XF_AH); 3212105197Ssam break; 3213105197Ssam case SADB_SATYPE_ESP: 3214105197Ssam error = xform_init(sav, XF_ESP); 3215105197Ssam break; 3216105197Ssam case SADB_X_SATYPE_IPCOMP: 3217105197Ssam error = xform_init(sav, XF_IPCOMP); 3218105197Ssam break; 3219125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3220125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3221125680Sbms break; 3222105197Ssam } 3223105197Ssam if (error) { 3224120585Ssam ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3225120585Ssam __func__, mhp->msg->sadb_msg_satype)); 3226105197Ssam goto fail; 3227105197Ssam } 3228105197Ssam 3229105197Ssam /* reset created */ 3230105197Ssam sav->created = time_second; 3231105197Ssam 3232105197Ssam /* make lifetime for CURRENT */ 3233176743Sbz sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); 3234105197Ssam if (sav->lft_c == NULL) { 3235120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3236105197Ssam error = ENOBUFS; 3237105197Ssam goto fail; 3238105197Ssam } 3239105197Ssam 3240157123Sgnn sav->lft_c->allocations = 0; 3241157123Sgnn sav->lft_c->bytes = 0; 3242157123Sgnn sav->lft_c->addtime = time_second; 3243157123Sgnn sav->lft_c->usetime = 0; 3244105197Ssam 3245105197Ssam /* lifetimes for HARD and SOFT */ 3246105197Ssam { 3247105197Ssam const struct sadb_lifetime *lft0; 3248105197Ssam 3249105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3250105197Ssam if (lft0 != NULL) { 3251105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3252105197Ssam error = EINVAL; 3253105197Ssam goto fail; 3254105197Ssam } 3255157123Sgnn sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3256105197Ssam if (sav->lft_h == NULL) { 3257120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3258105197Ssam error = ENOBUFS; 3259105197Ssam goto fail; 3260105197Ssam } 3261105197Ssam /* to be initialize ? */ 3262105197Ssam } 3263105197Ssam 3264105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3265105197Ssam if (lft0 != NULL) { 3266105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3267105197Ssam error = EINVAL; 3268105197Ssam goto fail; 3269105197Ssam } 3270157123Sgnn sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3271105197Ssam if (sav->lft_s == NULL) { 3272120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3273105197Ssam error = ENOBUFS; 3274105197Ssam goto fail; 3275105197Ssam } 3276105197Ssam /* to be initialize ? */ 3277105197Ssam } 3278105197Ssam } 3279105197Ssam 3280105197Ssam return 0; 3281105197Ssam 3282105197Ssam fail: 3283105197Ssam /* initialization */ 3284119643Ssam key_cleansav(sav); 3285105197Ssam 3286105197Ssam return error; 3287105197Ssam} 3288105197Ssam 3289105197Ssam/* 3290105197Ssam * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3291105197Ssam * OUT: 0: valid 3292105197Ssam * other: errno 3293105197Ssam */ 3294105197Ssamstatic int 3295119643Ssamkey_mature(struct secasvar *sav) 3296105197Ssam{ 3297105197Ssam int error; 3298105197Ssam 3299105197Ssam /* check SPI value */ 3300105197Ssam switch (sav->sah->saidx.proto) { 3301105197Ssam case IPPROTO_ESP: 3302105197Ssam case IPPROTO_AH: 3303170823Sbz /* 3304170823Sbz * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values 3305170823Sbz * 1-255 reserved by IANA for future use, 3306170823Sbz * 0 for implementation specific, local use. 3307170823Sbz */ 3308170823Sbz if (ntohl(sav->spi) <= 255) { 3309120585Ssam ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3310120585Ssam __func__, (u_int32_t)ntohl(sav->spi))); 3311105197Ssam return EINVAL; 3312105197Ssam } 3313105197Ssam break; 3314105197Ssam } 3315105197Ssam 3316105197Ssam /* check satype */ 3317105197Ssam switch (sav->sah->saidx.proto) { 3318105197Ssam case IPPROTO_ESP: 3319105197Ssam /* check flags */ 3320105197Ssam if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3321105197Ssam (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3322120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3323120585Ssam "given to old-esp.\n", __func__)); 3324105197Ssam return EINVAL; 3325105197Ssam } 3326105197Ssam error = xform_init(sav, XF_ESP); 3327105197Ssam break; 3328105197Ssam case IPPROTO_AH: 3329105197Ssam /* check flags */ 3330105197Ssam if (sav->flags & SADB_X_EXT_DERIV) { 3331120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3332120585Ssam "given to AH SA.\n", __func__)); 3333105197Ssam return EINVAL; 3334105197Ssam } 3335105197Ssam if (sav->alg_enc != SADB_EALG_NONE) { 3336120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3337120585Ssam "mismated.\n", __func__)); 3338105197Ssam return(EINVAL); 3339105197Ssam } 3340105197Ssam error = xform_init(sav, XF_AH); 3341105197Ssam break; 3342105197Ssam case IPPROTO_IPCOMP: 3343105197Ssam if (sav->alg_auth != SADB_AALG_NONE) { 3344120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3345120585Ssam "mismated.\n", __func__)); 3346105197Ssam return(EINVAL); 3347105197Ssam } 3348105197Ssam if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3349105197Ssam && ntohl(sav->spi) >= 0x10000) { 3350120585Ssam ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3351120585Ssam __func__)); 3352105197Ssam return(EINVAL); 3353105197Ssam } 3354105197Ssam error = xform_init(sav, XF_IPCOMP); 3355105197Ssam break; 3356125680Sbms case IPPROTO_TCP: 3357125680Sbms if (sav->alg_enc != SADB_EALG_NONE) { 3358125680Sbms ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3359125680Sbms "mismated.\n", __func__)); 3360125680Sbms return(EINVAL); 3361125680Sbms } 3362125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3363125680Sbms break; 3364105197Ssam default: 3365120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3366105197Ssam error = EPROTONOSUPPORT; 3367105197Ssam break; 3368105197Ssam } 3369119643Ssam if (error == 0) { 3370120585Ssam SAHTREE_LOCK(); 3371105197Ssam key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3372120585Ssam SAHTREE_UNLOCK(); 3373119643Ssam } 3374105197Ssam return (error); 3375105197Ssam} 3376105197Ssam 3377105197Ssam/* 3378105197Ssam * subroutine for SADB_GET and SADB_DUMP. 3379105197Ssam */ 3380105197Ssamstatic struct mbuf * 3381189004Srdivackykey_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3382189004Srdivacky u_int32_t seq, u_int32_t pid) 3383105197Ssam{ 3384105197Ssam struct mbuf *result = NULL, *tres = NULL, *m; 3385105197Ssam int i; 3386105197Ssam int dumporder[] = { 3387105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 3388105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3389105197Ssam SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3390105197Ssam SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3391105197Ssam SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3392105197Ssam SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3393194062Svanhu#ifdef IPSEC_NAT_T 3394194062Svanhu SADB_X_EXT_NAT_T_TYPE, 3395194062Svanhu SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3396194062Svanhu SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3397194062Svanhu SADB_X_EXT_NAT_T_FRAG, 3398194062Svanhu#endif 3399105197Ssam }; 3400105197Ssam 3401105197Ssam m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3402105197Ssam if (m == NULL) 3403105197Ssam goto fail; 3404105197Ssam result = m; 3405105197Ssam 3406105197Ssam for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3407105197Ssam m = NULL; 3408105197Ssam switch (dumporder[i]) { 3409105197Ssam case SADB_EXT_SA: 3410105197Ssam m = key_setsadbsa(sav); 3411105197Ssam if (!m) 3412105197Ssam goto fail; 3413105197Ssam break; 3414105197Ssam 3415105197Ssam case SADB_X_EXT_SA2: 3416105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 3417105197Ssam sav->replay ? sav->replay->count : 0, 3418105197Ssam sav->sah->saidx.reqid); 3419105197Ssam if (!m) 3420105197Ssam goto fail; 3421105197Ssam break; 3422105197Ssam 3423105197Ssam case SADB_EXT_ADDRESS_SRC: 3424105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3425105197Ssam &sav->sah->saidx.src.sa, 3426105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3427105197Ssam if (!m) 3428105197Ssam goto fail; 3429105197Ssam break; 3430105197Ssam 3431105197Ssam case SADB_EXT_ADDRESS_DST: 3432105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3433105197Ssam &sav->sah->saidx.dst.sa, 3434105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3435105197Ssam if (!m) 3436105197Ssam goto fail; 3437105197Ssam break; 3438105197Ssam 3439105197Ssam case SADB_EXT_KEY_AUTH: 3440105197Ssam if (!sav->key_auth) 3441105197Ssam continue; 3442157123Sgnn m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH); 3443157123Sgnn if (!m) 3444157123Sgnn goto fail; 3445105197Ssam break; 3446105197Ssam 3447105197Ssam case SADB_EXT_KEY_ENCRYPT: 3448105197Ssam if (!sav->key_enc) 3449105197Ssam continue; 3450157123Sgnn m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT); 3451157123Sgnn if (!m) 3452157123Sgnn goto fail; 3453105197Ssam break; 3454105197Ssam 3455105197Ssam case SADB_EXT_LIFETIME_CURRENT: 3456105197Ssam if (!sav->lft_c) 3457105197Ssam continue; 3458157123Sgnn m = key_setlifetime(sav->lft_c, 3459157123Sgnn SADB_EXT_LIFETIME_CURRENT); 3460157123Sgnn if (!m) 3461157123Sgnn goto fail; 3462105197Ssam break; 3463105197Ssam 3464105197Ssam case SADB_EXT_LIFETIME_HARD: 3465105197Ssam if (!sav->lft_h) 3466105197Ssam continue; 3467157123Sgnn m = key_setlifetime(sav->lft_h, 3468157123Sgnn SADB_EXT_LIFETIME_HARD); 3469157123Sgnn if (!m) 3470157123Sgnn goto fail; 3471105197Ssam break; 3472105197Ssam 3473105197Ssam case SADB_EXT_LIFETIME_SOFT: 3474105197Ssam if (!sav->lft_s) 3475105197Ssam continue; 3476177554Sbz m = key_setlifetime(sav->lft_s, 3477157123Sgnn SADB_EXT_LIFETIME_SOFT); 3478157123Sgnn 3479157123Sgnn if (!m) 3480157123Sgnn goto fail; 3481105197Ssam break; 3482105197Ssam 3483194062Svanhu#ifdef IPSEC_NAT_T 3484194062Svanhu case SADB_X_EXT_NAT_T_TYPE: 3485194062Svanhu m = key_setsadbxtype(sav->natt_type); 3486194062Svanhu if (!m) 3487194062Svanhu goto fail; 3488194062Svanhu break; 3489194062Svanhu 3490194062Svanhu case SADB_X_EXT_NAT_T_DPORT: 3491194062Svanhu m = key_setsadbxport( 3492194062Svanhu KEY_PORTFROMSADDR(&sav->sah->saidx.dst), 3493194062Svanhu SADB_X_EXT_NAT_T_DPORT); 3494194062Svanhu if (!m) 3495194062Svanhu goto fail; 3496194062Svanhu break; 3497194062Svanhu 3498194062Svanhu case SADB_X_EXT_NAT_T_SPORT: 3499194062Svanhu m = key_setsadbxport( 3500194062Svanhu KEY_PORTFROMSADDR(&sav->sah->saidx.src), 3501194062Svanhu SADB_X_EXT_NAT_T_SPORT); 3502194062Svanhu if (!m) 3503194062Svanhu goto fail; 3504194062Svanhu break; 3505194062Svanhu 3506194062Svanhu case SADB_X_EXT_NAT_T_OAI: 3507194062Svanhu case SADB_X_EXT_NAT_T_OAR: 3508194062Svanhu case SADB_X_EXT_NAT_T_FRAG: 3509194062Svanhu /* We do not (yet) support those. */ 3510194062Svanhu continue; 3511194062Svanhu#endif 3512194062Svanhu 3513105197Ssam case SADB_EXT_ADDRESS_PROXY: 3514105197Ssam case SADB_EXT_IDENTITY_SRC: 3515105197Ssam case SADB_EXT_IDENTITY_DST: 3516105197Ssam /* XXX: should we brought from SPD ? */ 3517105197Ssam case SADB_EXT_SENSITIVITY: 3518105197Ssam default: 3519105197Ssam continue; 3520105197Ssam } 3521105197Ssam 3522157123Sgnn if (!m) 3523105197Ssam goto fail; 3524105197Ssam if (tres) 3525105197Ssam m_cat(m, tres); 3526105197Ssam tres = m; 3527157123Sgnn 3528105197Ssam } 3529105197Ssam 3530105197Ssam m_cat(result, tres); 3531105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 3532105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 3533105197Ssam if (result == NULL) 3534105197Ssam goto fail; 3535105197Ssam } 3536105197Ssam 3537105197Ssam result->m_pkthdr.len = 0; 3538105197Ssam for (m = result; m; m = m->m_next) 3539105197Ssam result->m_pkthdr.len += m->m_len; 3540105197Ssam 3541105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 3542105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 3543105197Ssam 3544105197Ssam return result; 3545105197Ssam 3546105197Ssamfail: 3547105197Ssam m_freem(result); 3548105197Ssam m_freem(tres); 3549105197Ssam return NULL; 3550105197Ssam} 3551105197Ssam 3552105197Ssam/* 3553105197Ssam * set data into sadb_msg. 3554105197Ssam */ 3555105197Ssamstatic struct mbuf * 3556189004Srdivackykey_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, 3557189004Srdivacky pid_t pid, u_int16_t reserved) 3558105197Ssam{ 3559105197Ssam struct mbuf *m; 3560105197Ssam struct sadb_msg *p; 3561105197Ssam int len; 3562105197Ssam 3563105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3564105197Ssam if (len > MCLBYTES) 3565105197Ssam return NULL; 3566111119Simp MGETHDR(m, M_DONTWAIT, MT_DATA); 3567105197Ssam if (m && len > MHLEN) { 3568111119Simp MCLGET(m, M_DONTWAIT); 3569105197Ssam if ((m->m_flags & M_EXT) == 0) { 3570105197Ssam m_freem(m); 3571105197Ssam m = NULL; 3572105197Ssam } 3573105197Ssam } 3574105197Ssam if (!m) 3575105197Ssam return NULL; 3576105197Ssam m->m_pkthdr.len = m->m_len = len; 3577105197Ssam m->m_next = NULL; 3578105197Ssam 3579105197Ssam p = mtod(m, struct sadb_msg *); 3580105197Ssam 3581105197Ssam bzero(p, len); 3582105197Ssam p->sadb_msg_version = PF_KEY_V2; 3583105197Ssam p->sadb_msg_type = type; 3584105197Ssam p->sadb_msg_errno = 0; 3585105197Ssam p->sadb_msg_satype = satype; 3586105197Ssam p->sadb_msg_len = PFKEY_UNIT64(tlen); 3587105197Ssam p->sadb_msg_reserved = reserved; 3588105197Ssam p->sadb_msg_seq = seq; 3589105197Ssam p->sadb_msg_pid = (u_int32_t)pid; 3590105197Ssam 3591105197Ssam return m; 3592105197Ssam} 3593105197Ssam 3594105197Ssam/* 3595105197Ssam * copy secasvar data into sadb_address. 3596105197Ssam */ 3597105197Ssamstatic struct mbuf * 3598105197Ssamkey_setsadbsa(sav) 3599105197Ssam struct secasvar *sav; 3600105197Ssam{ 3601105197Ssam struct mbuf *m; 3602105197Ssam struct sadb_sa *p; 3603105197Ssam int len; 3604105197Ssam 3605105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3606105197Ssam m = key_alloc_mbuf(len); 3607105197Ssam if (!m || m->m_next) { /*XXX*/ 3608105197Ssam if (m) 3609105197Ssam m_freem(m); 3610105197Ssam return NULL; 3611105197Ssam } 3612105197Ssam 3613105197Ssam p = mtod(m, struct sadb_sa *); 3614105197Ssam 3615105197Ssam bzero(p, len); 3616105197Ssam p->sadb_sa_len = PFKEY_UNIT64(len); 3617105197Ssam p->sadb_sa_exttype = SADB_EXT_SA; 3618105197Ssam p->sadb_sa_spi = sav->spi; 3619105197Ssam p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3620105197Ssam p->sadb_sa_state = sav->state; 3621105197Ssam p->sadb_sa_auth = sav->alg_auth; 3622105197Ssam p->sadb_sa_encrypt = sav->alg_enc; 3623105197Ssam p->sadb_sa_flags = sav->flags; 3624105197Ssam 3625105197Ssam return m; 3626105197Ssam} 3627105197Ssam 3628105197Ssam/* 3629105197Ssam * set data into sadb_address. 3630105197Ssam */ 3631105197Ssamstatic struct mbuf * 3632189004Srdivackykey_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto) 3633105197Ssam{ 3634105197Ssam struct mbuf *m; 3635105197Ssam struct sadb_address *p; 3636105197Ssam size_t len; 3637105197Ssam 3638105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3639105197Ssam PFKEY_ALIGN8(saddr->sa_len); 3640105197Ssam m = key_alloc_mbuf(len); 3641105197Ssam if (!m || m->m_next) { /*XXX*/ 3642105197Ssam if (m) 3643105197Ssam m_freem(m); 3644105197Ssam return NULL; 3645105197Ssam } 3646105197Ssam 3647105197Ssam p = mtod(m, struct sadb_address *); 3648105197Ssam 3649105197Ssam bzero(p, len); 3650105197Ssam p->sadb_address_len = PFKEY_UNIT64(len); 3651105197Ssam p->sadb_address_exttype = exttype; 3652105197Ssam p->sadb_address_proto = ul_proto; 3653105197Ssam if (prefixlen == FULLMASK) { 3654105197Ssam switch (saddr->sa_family) { 3655105197Ssam case AF_INET: 3656105197Ssam prefixlen = sizeof(struct in_addr) << 3; 3657105197Ssam break; 3658105197Ssam case AF_INET6: 3659105197Ssam prefixlen = sizeof(struct in6_addr) << 3; 3660105197Ssam break; 3661105197Ssam default: 3662105197Ssam ; /*XXX*/ 3663105197Ssam } 3664105197Ssam } 3665105197Ssam p->sadb_address_prefixlen = prefixlen; 3666105197Ssam p->sadb_address_reserved = 0; 3667105197Ssam 3668105197Ssam bcopy(saddr, 3669105197Ssam mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3670105197Ssam saddr->sa_len); 3671105197Ssam 3672105197Ssam return m; 3673105197Ssam} 3674105197Ssam 3675105197Ssam/* 3676105197Ssam * set data into sadb_x_sa2. 3677105197Ssam */ 3678105197Ssamstatic struct mbuf * 3679189004Srdivackykey_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) 3680105197Ssam{ 3681105197Ssam struct mbuf *m; 3682105197Ssam struct sadb_x_sa2 *p; 3683105197Ssam size_t len; 3684105197Ssam 3685105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3686105197Ssam m = key_alloc_mbuf(len); 3687105197Ssam if (!m || m->m_next) { /*XXX*/ 3688105197Ssam if (m) 3689105197Ssam m_freem(m); 3690105197Ssam return NULL; 3691105197Ssam } 3692105197Ssam 3693105197Ssam p = mtod(m, struct sadb_x_sa2 *); 3694105197Ssam 3695105197Ssam bzero(p, len); 3696105197Ssam p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3697105197Ssam p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3698105197Ssam p->sadb_x_sa2_mode = mode; 3699105197Ssam p->sadb_x_sa2_reserved1 = 0; 3700105197Ssam p->sadb_x_sa2_reserved2 = 0; 3701105197Ssam p->sadb_x_sa2_sequence = seq; 3702105197Ssam p->sadb_x_sa2_reqid = reqid; 3703105197Ssam 3704105197Ssam return m; 3705105197Ssam} 3706105197Ssam 3707194062Svanhu#ifdef IPSEC_NAT_T 3708105197Ssam/* 3709194062Svanhu * Set a type in sadb_x_nat_t_type. 3710194062Svanhu */ 3711194062Svanhustatic struct mbuf * 3712194062Svanhukey_setsadbxtype(u_int16_t type) 3713194062Svanhu{ 3714194062Svanhu struct mbuf *m; 3715194062Svanhu size_t len; 3716194062Svanhu struct sadb_x_nat_t_type *p; 3717194062Svanhu 3718194062Svanhu len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3719194062Svanhu 3720194062Svanhu m = key_alloc_mbuf(len); 3721194062Svanhu if (!m || m->m_next) { /*XXX*/ 3722194062Svanhu if (m) 3723194062Svanhu m_freem(m); 3724194062Svanhu return (NULL); 3725194062Svanhu } 3726194062Svanhu 3727194062Svanhu p = mtod(m, struct sadb_x_nat_t_type *); 3728194062Svanhu 3729194062Svanhu bzero(p, len); 3730194062Svanhu p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3731194062Svanhu p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3732194062Svanhu p->sadb_x_nat_t_type_type = type; 3733194062Svanhu 3734194062Svanhu return (m); 3735194062Svanhu} 3736194062Svanhu/* 3737194062Svanhu * Set a port in sadb_x_nat_t_port. 3738194062Svanhu * In contrast to default RFC 2367 behaviour, port is in network byte order. 3739194062Svanhu */ 3740194062Svanhustatic struct mbuf * 3741194062Svanhukey_setsadbxport(u_int16_t port, u_int16_t type) 3742194062Svanhu{ 3743194062Svanhu struct mbuf *m; 3744194062Svanhu size_t len; 3745194062Svanhu struct sadb_x_nat_t_port *p; 3746194062Svanhu 3747194062Svanhu len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3748194062Svanhu 3749194062Svanhu m = key_alloc_mbuf(len); 3750194062Svanhu if (!m || m->m_next) { /*XXX*/ 3751194062Svanhu if (m) 3752194062Svanhu m_freem(m); 3753194062Svanhu return (NULL); 3754194062Svanhu } 3755194062Svanhu 3756194062Svanhu p = mtod(m, struct sadb_x_nat_t_port *); 3757194062Svanhu 3758194062Svanhu bzero(p, len); 3759194062Svanhu p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3760194062Svanhu p->sadb_x_nat_t_port_exttype = type; 3761194062Svanhu p->sadb_x_nat_t_port_port = port; 3762194062Svanhu 3763194062Svanhu return (m); 3764194062Svanhu} 3765194062Svanhu 3766194062Svanhu/* 3767194062Svanhu * Get port from sockaddr. Port is in network byte order. 3768194062Svanhu */ 3769194062Svanhuu_int16_t 3770194062Svanhukey_portfromsaddr(struct sockaddr *sa) 3771194062Svanhu{ 3772194062Svanhu 3773194062Svanhu switch (sa->sa_family) { 3774194062Svanhu#ifdef INET 3775194062Svanhu case AF_INET: 3776194062Svanhu return ((struct sockaddr_in *)sa)->sin_port; 3777194062Svanhu#endif 3778194062Svanhu#ifdef INET6 3779194062Svanhu case AF_INET6: 3780194062Svanhu return ((struct sockaddr_in6 *)sa)->sin6_port; 3781194062Svanhu#endif 3782194062Svanhu } 3783194062Svanhu KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3784194062Svanhu printf("DP %s unexpected address family %d\n", 3785194062Svanhu __func__, sa->sa_family)); 3786194062Svanhu return (0); 3787194062Svanhu} 3788194062Svanhu#endif /* IPSEC_NAT_T */ 3789194062Svanhu 3790194062Svanhu/* 3791194062Svanhu * Set port in struct sockaddr. Port is in network byte order. 3792194062Svanhu */ 3793194062Svanhustatic void 3794194062Svanhukey_porttosaddr(struct sockaddr *sa, u_int16_t port) 3795194062Svanhu{ 3796194062Svanhu 3797194062Svanhu switch (sa->sa_family) { 3798194062Svanhu#ifdef INET 3799194062Svanhu case AF_INET: 3800194062Svanhu ((struct sockaddr_in *)sa)->sin_port = port; 3801194062Svanhu break; 3802194062Svanhu#endif 3803194062Svanhu#ifdef INET6 3804194062Svanhu case AF_INET6: 3805194062Svanhu ((struct sockaddr_in6 *)sa)->sin6_port = port; 3806194062Svanhu break; 3807194062Svanhu#endif 3808194062Svanhu default: 3809194062Svanhu ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n", 3810194062Svanhu __func__, sa->sa_family)); 3811194062Svanhu break; 3812194062Svanhu } 3813194062Svanhu} 3814194062Svanhu 3815194062Svanhu/* 3816105197Ssam * set data into sadb_x_policy 3817105197Ssam */ 3818105197Ssamstatic struct mbuf * 3819189004Srdivackykey_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3820105197Ssam{ 3821105197Ssam struct mbuf *m; 3822105197Ssam struct sadb_x_policy *p; 3823105197Ssam size_t len; 3824105197Ssam 3825105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3826105197Ssam m = key_alloc_mbuf(len); 3827105197Ssam if (!m || m->m_next) { /*XXX*/ 3828105197Ssam if (m) 3829105197Ssam m_freem(m); 3830105197Ssam return NULL; 3831105197Ssam } 3832105197Ssam 3833105197Ssam p = mtod(m, struct sadb_x_policy *); 3834105197Ssam 3835105197Ssam bzero(p, len); 3836105197Ssam p->sadb_x_policy_len = PFKEY_UNIT64(len); 3837105197Ssam p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3838105197Ssam p->sadb_x_policy_type = type; 3839105197Ssam p->sadb_x_policy_dir = dir; 3840105197Ssam p->sadb_x_policy_id = id; 3841105197Ssam 3842105197Ssam return m; 3843105197Ssam} 3844105197Ssam 3845105197Ssam/* %%% utilities */ 3846157123Sgnn/* Take a key message (sadb_key) from the socket and turn it into one 3847157123Sgnn * of the kernel's key structures (seckey). 3848157123Sgnn * 3849157123Sgnn * IN: pointer to the src 3850157123Sgnn * OUT: NULL no more memory 3851105197Ssam */ 3852157123Sgnnstruct seckey * 3853157123Sgnnkey_dup_keymsg(const struct sadb_key *src, u_int len, 3854157123Sgnn struct malloc_type *type) 3855105197Ssam{ 3856157123Sgnn struct seckey *dst; 3857157123Sgnn dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); 3858157123Sgnn if (dst != NULL) { 3859157123Sgnn dst->bits = src->sadb_key_bits; 3860157123Sgnn dst->key_data = (char *)malloc(len, type, M_NOWAIT); 3861157123Sgnn if (dst->key_data != NULL) { 3862157123Sgnn bcopy((const char *)src + sizeof(struct sadb_key), 3863157123Sgnn dst->key_data, len); 3864157123Sgnn } else { 3865157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3866157123Sgnn __func__)); 3867157123Sgnn free(dst, type); 3868157123Sgnn dst = NULL; 3869157123Sgnn } 3870157123Sgnn } else { 3871157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3872157123Sgnn __func__)); 3873105197Ssam 3874157123Sgnn } 3875157123Sgnn return dst; 3876157123Sgnn} 3877157123Sgnn 3878157123Sgnn/* Take a lifetime message (sadb_lifetime) passed in on a socket and 3879157123Sgnn * turn it into one of the kernel's lifetime structures (seclifetime). 3880157123Sgnn * 3881157123Sgnn * IN: pointer to the destination, source and malloc type 3882157123Sgnn * OUT: NULL, no more memory 3883157123Sgnn */ 3884157123Sgnn 3885157123Sgnnstatic struct seclifetime * 3886157123Sgnnkey_dup_lifemsg(const struct sadb_lifetime *src, 3887157123Sgnn struct malloc_type *type) 3888157123Sgnn{ 3889157123Sgnn struct seclifetime *dst = NULL; 3890157123Sgnn 3891157123Sgnn dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), 3892157123Sgnn type, M_NOWAIT); 3893157123Sgnn if (dst == NULL) { 3894119643Ssam /* XXX counter */ 3895120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3896157123Sgnn } else { 3897157123Sgnn dst->allocations = src->sadb_lifetime_allocations; 3898157123Sgnn dst->bytes = src->sadb_lifetime_bytes; 3899157123Sgnn dst->addtime = src->sadb_lifetime_addtime; 3900157123Sgnn dst->usetime = src->sadb_lifetime_usetime; 3901157123Sgnn } 3902157123Sgnn return dst; 3903105197Ssam} 3904105197Ssam 3905105197Ssam/* compare my own address 3906105197Ssam * OUT: 1: true, i.e. my address. 3907105197Ssam * 0: false 3908105197Ssam */ 3909105197Ssamint 3910105197Ssamkey_ismyaddr(sa) 3911105197Ssam struct sockaddr *sa; 3912105197Ssam{ 3913105197Ssam#ifdef INET 3914105197Ssam struct sockaddr_in *sin; 3915105197Ssam struct in_ifaddr *ia; 3916105197Ssam#endif 3917105197Ssam 3918120585Ssam IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3919105197Ssam 3920105197Ssam switch (sa->sa_family) { 3921105197Ssam#ifdef INET 3922105197Ssam case AF_INET: 3923105197Ssam sin = (struct sockaddr_in *)sa; 3924194951Srwatson IN_IFADDR_RLOCK(); 3925181803Sbz for (ia = V_in_ifaddrhead.tqh_first; ia; 3926105197Ssam ia = ia->ia_link.tqe_next) 3927105197Ssam { 3928105197Ssam if (sin->sin_family == ia->ia_addr.sin_family && 3929105197Ssam sin->sin_len == ia->ia_addr.sin_len && 3930105197Ssam sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3931105197Ssam { 3932194951Srwatson IN_IFADDR_RUNLOCK(); 3933105197Ssam return 1; 3934105197Ssam } 3935105197Ssam } 3936194951Srwatson IN_IFADDR_RUNLOCK(); 3937105197Ssam break; 3938105197Ssam#endif 3939105197Ssam#ifdef INET6 3940105197Ssam case AF_INET6: 3941105197Ssam return key_ismyaddr6((struct sockaddr_in6 *)sa); 3942105197Ssam#endif 3943105197Ssam } 3944105197Ssam 3945105197Ssam return 0; 3946105197Ssam} 3947105197Ssam 3948105197Ssam#ifdef INET6 3949105197Ssam/* 3950105197Ssam * compare my own address for IPv6. 3951105197Ssam * 1: ours 3952105197Ssam * 0: other 3953105197Ssam * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3954105197Ssam */ 3955105197Ssam#include <netinet6/in6_var.h> 3956105197Ssam 3957105197Ssamstatic int 3958105197Ssamkey_ismyaddr6(sin6) 3959105197Ssam struct sockaddr_in6 *sin6; 3960105197Ssam{ 3961105197Ssam struct in6_ifaddr *ia; 3962191663Sbms#if 0 3963105197Ssam struct in6_multi *in6m; 3964191663Sbms#endif 3965105197Ssam 3966194971Srwatson IN6_IFADDR_RLOCK(); 3967194907Srwatson TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 3968105197Ssam if (key_sockaddrcmp((struct sockaddr *)&sin6, 3969194971Srwatson (struct sockaddr *)&ia->ia_addr, 0) == 0) { 3970194971Srwatson IN6_IFADDR_RUNLOCK(); 3971105197Ssam return 1; 3972194971Srwatson } 3973105197Ssam 3974191663Sbms#if 0 3975105197Ssam /* 3976105197Ssam * XXX Multicast 3977105197Ssam * XXX why do we care about multlicast here while we don't care 3978105197Ssam * about IPv4 multicast?? 3979105197Ssam * XXX scope 3980105197Ssam */ 3981105197Ssam in6m = NULL; 3982105197Ssam IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3983194971Srwatson if (in6m) { 3984194971Srwatson IN6_IFADDR_RUNLOCK(); 3985105197Ssam return 1; 3986194971Srwatson } 3987191663Sbms#endif 3988105197Ssam } 3989194971Srwatson IN6_IFADDR_RUNLOCK(); 3990105197Ssam 3991105197Ssam /* loopback, just for safety */ 3992105197Ssam if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3993105197Ssam return 1; 3994105197Ssam 3995105197Ssam return 0; 3996105197Ssam} 3997105197Ssam#endif /*INET6*/ 3998105197Ssam 3999105197Ssam/* 4000105197Ssam * compare two secasindex structure. 4001105197Ssam * flag can specify to compare 2 saidxes. 4002105197Ssam * compare two secasindex structure without both mode and reqid. 4003105197Ssam * don't compare port. 4004105197Ssam * IN: 4005105197Ssam * saidx0: source, it can be in SAD. 4006105197Ssam * saidx1: object. 4007105197Ssam * OUT: 4008105197Ssam * 1 : equal 4009105197Ssam * 0 : not equal 4010105197Ssam */ 4011105197Ssamstatic int 4012105197Ssamkey_cmpsaidx( 4013105197Ssam const struct secasindex *saidx0, 4014105197Ssam const struct secasindex *saidx1, 4015105197Ssam int flag) 4016105197Ssam{ 4017194062Svanhu int chkport = 0; 4018194062Svanhu 4019105197Ssam /* sanity */ 4020105197Ssam if (saidx0 == NULL && saidx1 == NULL) 4021105197Ssam return 1; 4022105197Ssam 4023105197Ssam if (saidx0 == NULL || saidx1 == NULL) 4024105197Ssam return 0; 4025105197Ssam 4026105197Ssam if (saidx0->proto != saidx1->proto) 4027105197Ssam return 0; 4028105197Ssam 4029105197Ssam if (flag == CMP_EXACTLY) { 4030105197Ssam if (saidx0->mode != saidx1->mode) 4031105197Ssam return 0; 4032105197Ssam if (saidx0->reqid != saidx1->reqid) 4033105197Ssam return 0; 4034105197Ssam if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4035105197Ssam bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4036105197Ssam return 0; 4037105197Ssam } else { 4038105197Ssam 4039105197Ssam /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4040105197Ssam if (flag == CMP_MODE_REQID 4041105197Ssam ||flag == CMP_REQID) { 4042105197Ssam /* 4043105197Ssam * If reqid of SPD is non-zero, unique SA is required. 4044105197Ssam * The result must be of same reqid in this case. 4045105197Ssam */ 4046105197Ssam if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4047105197Ssam return 0; 4048105197Ssam } 4049105197Ssam 4050105197Ssam if (flag == CMP_MODE_REQID) { 4051105197Ssam if (saidx0->mode != IPSEC_MODE_ANY 4052105197Ssam && saidx0->mode != saidx1->mode) 4053105197Ssam return 0; 4054105197Ssam } 4055105197Ssam 4056194062Svanhu#ifdef IPSEC_NAT_T 4057194062Svanhu /* 4058194062Svanhu * If NAT-T is enabled, check ports for tunnel mode. 4059194062Svanhu * Do not check ports if they are set to zero in the SPD. 4060194062Svanhu * Also do not do it for transport mode, as there is no 4061194062Svanhu * port information available in the SP. 4062194062Svanhu */ 4063194062Svanhu if (saidx1->mode == IPSEC_MODE_TUNNEL && 4064194062Svanhu saidx1->src.sa.sa_family == AF_INET && 4065194062Svanhu saidx1->dst.sa.sa_family == AF_INET && 4066194062Svanhu ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4067194062Svanhu ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) 4068194062Svanhu chkport = 1; 4069194062Svanhu#endif /* IPSEC_NAT_T */ 4070194062Svanhu 4071194062Svanhu if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4072105197Ssam return 0; 4073105197Ssam } 4074194062Svanhu if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4075105197Ssam return 0; 4076105197Ssam } 4077105197Ssam } 4078105197Ssam 4079105197Ssam return 1; 4080105197Ssam} 4081105197Ssam 4082105197Ssam/* 4083105197Ssam * compare two secindex structure exactly. 4084105197Ssam * IN: 4085105197Ssam * spidx0: source, it is often in SPD. 4086105197Ssam * spidx1: object, it is often from PFKEY message. 4087105197Ssam * OUT: 4088105197Ssam * 1 : equal 4089105197Ssam * 0 : not equal 4090105197Ssam */ 4091105197Ssamstatic int 4092105197Ssamkey_cmpspidx_exactly( 4093105197Ssam struct secpolicyindex *spidx0, 4094105197Ssam struct secpolicyindex *spidx1) 4095105197Ssam{ 4096105197Ssam /* sanity */ 4097105197Ssam if (spidx0 == NULL && spidx1 == NULL) 4098105197Ssam return 1; 4099105197Ssam 4100105197Ssam if (spidx0 == NULL || spidx1 == NULL) 4101105197Ssam return 0; 4102105197Ssam 4103105197Ssam if (spidx0->prefs != spidx1->prefs 4104105197Ssam || spidx0->prefd != spidx1->prefd 4105105197Ssam || spidx0->ul_proto != spidx1->ul_proto) 4106105197Ssam return 0; 4107105197Ssam 4108105197Ssam return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4109105197Ssam key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4110105197Ssam} 4111105197Ssam 4112105197Ssam/* 4113105197Ssam * compare two secindex structure with mask. 4114105197Ssam * IN: 4115105197Ssam * spidx0: source, it is often in SPD. 4116105197Ssam * spidx1: object, it is often from IP header. 4117105197Ssam * OUT: 4118105197Ssam * 1 : equal 4119105197Ssam * 0 : not equal 4120105197Ssam */ 4121105197Ssamstatic int 4122105197Ssamkey_cmpspidx_withmask( 4123105197Ssam struct secpolicyindex *spidx0, 4124105197Ssam struct secpolicyindex *spidx1) 4125105197Ssam{ 4126105197Ssam /* sanity */ 4127105197Ssam if (spidx0 == NULL && spidx1 == NULL) 4128105197Ssam return 1; 4129105197Ssam 4130105197Ssam if (spidx0 == NULL || spidx1 == NULL) 4131105197Ssam return 0; 4132105197Ssam 4133105197Ssam if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4134105197Ssam spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4135105197Ssam spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4136105197Ssam spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4137105197Ssam return 0; 4138105197Ssam 4139105197Ssam /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4140105197Ssam if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4141105197Ssam && spidx0->ul_proto != spidx1->ul_proto) 4142105197Ssam return 0; 4143105197Ssam 4144105197Ssam switch (spidx0->src.sa.sa_family) { 4145105197Ssam case AF_INET: 4146105197Ssam if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4147105197Ssam && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4148105197Ssam return 0; 4149105197Ssam if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4150105197Ssam &spidx1->src.sin.sin_addr, spidx0->prefs)) 4151105197Ssam return 0; 4152105197Ssam break; 4153105197Ssam case AF_INET6: 4154105197Ssam if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4155105197Ssam && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4156105197Ssam return 0; 4157105197Ssam /* 4158105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 4159105197Ssam * as a wildcard scope, which matches any scope zone ID. 4160105197Ssam */ 4161105197Ssam if (spidx0->src.sin6.sin6_scope_id && 4162105197Ssam spidx1->src.sin6.sin6_scope_id && 4163105197Ssam spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4164105197Ssam return 0; 4165105197Ssam if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4166105197Ssam &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4167105197Ssam return 0; 4168105197Ssam break; 4169105197Ssam default: 4170105197Ssam /* XXX */ 4171105197Ssam if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4172105197Ssam return 0; 4173105197Ssam break; 4174105197Ssam } 4175105197Ssam 4176105197Ssam switch (spidx0->dst.sa.sa_family) { 4177105197Ssam case AF_INET: 4178105197Ssam if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4179105197Ssam && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4180105197Ssam return 0; 4181105197Ssam if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4182105197Ssam &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4183105197Ssam return 0; 4184105197Ssam break; 4185105197Ssam case AF_INET6: 4186105197Ssam if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4187105197Ssam && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4188105197Ssam return 0; 4189105197Ssam /* 4190105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 4191105197Ssam * as a wildcard scope, which matches any scope zone ID. 4192105197Ssam */ 4193130928Sbms if (spidx0->dst.sin6.sin6_scope_id && 4194130928Sbms spidx1->dst.sin6.sin6_scope_id && 4195105197Ssam spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4196105197Ssam return 0; 4197105197Ssam if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4198105197Ssam &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4199105197Ssam return 0; 4200105197Ssam break; 4201105197Ssam default: 4202105197Ssam /* XXX */ 4203105197Ssam if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4204105197Ssam return 0; 4205105197Ssam break; 4206105197Ssam } 4207105197Ssam 4208105197Ssam /* XXX Do we check other field ? e.g. flowinfo */ 4209105197Ssam 4210105197Ssam return 1; 4211105197Ssam} 4212105197Ssam 4213105197Ssam/* returns 0 on match */ 4214105197Ssamstatic int 4215105197Ssamkey_sockaddrcmp( 4216105197Ssam const struct sockaddr *sa1, 4217105197Ssam const struct sockaddr *sa2, 4218105197Ssam int port) 4219105197Ssam{ 4220105197Ssam#ifdef satosin 4221105197Ssam#undef satosin 4222105197Ssam#endif 4223105197Ssam#define satosin(s) ((const struct sockaddr_in *)s) 4224105197Ssam#ifdef satosin6 4225105197Ssam#undef satosin6 4226105197Ssam#endif 4227105197Ssam#define satosin6(s) ((const struct sockaddr_in6 *)s) 4228105197Ssam if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4229105197Ssam return 1; 4230105197Ssam 4231105197Ssam switch (sa1->sa_family) { 4232105197Ssam case AF_INET: 4233105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in)) 4234105197Ssam return 1; 4235105197Ssam if (satosin(sa1)->sin_addr.s_addr != 4236105197Ssam satosin(sa2)->sin_addr.s_addr) { 4237105197Ssam return 1; 4238105197Ssam } 4239105197Ssam if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4240105197Ssam return 1; 4241105197Ssam break; 4242105197Ssam case AF_INET6: 4243105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4244105197Ssam return 1; /*EINVAL*/ 4245105197Ssam if (satosin6(sa1)->sin6_scope_id != 4246105197Ssam satosin6(sa2)->sin6_scope_id) { 4247105197Ssam return 1; 4248105197Ssam } 4249105197Ssam if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4250105197Ssam &satosin6(sa2)->sin6_addr)) { 4251105197Ssam return 1; 4252105197Ssam } 4253105197Ssam if (port && 4254105197Ssam satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4255105197Ssam return 1; 4256105197Ssam } 4257170120Sbz break; 4258105197Ssam default: 4259105197Ssam if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4260105197Ssam return 1; 4261105197Ssam break; 4262105197Ssam } 4263105197Ssam 4264105197Ssam return 0; 4265105197Ssam#undef satosin 4266105197Ssam#undef satosin6 4267105197Ssam} 4268105197Ssam 4269105197Ssam/* 4270105197Ssam * compare two buffers with mask. 4271105197Ssam * IN: 4272105197Ssam * addr1: source 4273105197Ssam * addr2: object 4274105197Ssam * bits: Number of bits to compare 4275105197Ssam * OUT: 4276105197Ssam * 1 : equal 4277105197Ssam * 0 : not equal 4278105197Ssam */ 4279105197Ssamstatic int 4280105197Ssamkey_bbcmp(const void *a1, const void *a2, u_int bits) 4281105197Ssam{ 4282105197Ssam const unsigned char *p1 = a1; 4283105197Ssam const unsigned char *p2 = a2; 4284105197Ssam 4285105197Ssam /* XXX: This could be considerably faster if we compare a word 4286105197Ssam * at a time, but it is complicated on LSB Endian machines */ 4287105197Ssam 4288105197Ssam /* Handle null pointers */ 4289105197Ssam if (p1 == NULL || p2 == NULL) 4290105197Ssam return (p1 == p2); 4291105197Ssam 4292105197Ssam while (bits >= 8) { 4293105197Ssam if (*p1++ != *p2++) 4294105197Ssam return 0; 4295105197Ssam bits -= 8; 4296105197Ssam } 4297105197Ssam 4298105197Ssam if (bits > 0) { 4299105197Ssam u_int8_t mask = ~((1<<(8-bits))-1); 4300105197Ssam if ((*p1 & mask) != (*p2 & mask)) 4301105197Ssam return 0; 4302105197Ssam } 4303105197Ssam return 1; /* Match! */ 4304105197Ssam} 4305105197Ssam 4306119643Ssamstatic void 4307119643Ssamkey_flush_spd(time_t now) 4308105197Ssam{ 4309120585Ssam static u_int16_t sptree_scangen = 0; 4310120585Ssam u_int16_t gen = sptree_scangen++; 4311120585Ssam struct secpolicy *sp; 4312105197Ssam u_int dir; 4313105197Ssam 4314105197Ssam /* SPD */ 4315105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4316120585Ssamrestart: 4317120585Ssam SPTREE_LOCK(); 4318181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 4319120585Ssam if (sp->scangen == gen) /* previously handled */ 4320120585Ssam continue; 4321120585Ssam sp->scangen = gen; 4322192880Svanhu if (sp->state == IPSEC_SPSTATE_DEAD && 4323192880Svanhu sp->refcnt == 1) { 4324192880Svanhu /* 4325192880Svanhu * Ensure that we only decrease refcnt once, 4326192880Svanhu * when we're the last consumer. 4327192880Svanhu * Directly call SP_DELREF/key_delsp instead 4328192880Svanhu * of KEY_FREESP to avoid unlocking/relocking 4329192880Svanhu * SPTREE_LOCK before key_delsp: may refcnt 4330192880Svanhu * be increased again during that time ? 4331192880Svanhu * NB: also clean entries created by 4332192880Svanhu * key_spdflush 4333192880Svanhu */ 4334192880Svanhu SP_DELREF(sp); 4335192880Svanhu key_delsp(sp); 4336120585Ssam SPTREE_UNLOCK(); 4337120585Ssam goto restart; 4338105197Ssam } 4339105197Ssam if (sp->lifetime == 0 && sp->validtime == 0) 4340105197Ssam continue; 4341105197Ssam if ((sp->lifetime && now - sp->created > sp->lifetime) 4342105197Ssam || (sp->validtime && now - sp->lastused > sp->validtime)) { 4343105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 4344120585Ssam SPTREE_UNLOCK(); 4345105197Ssam key_spdexpire(sp); 4346120585Ssam goto restart; 4347105197Ssam } 4348105197Ssam } 4349120585Ssam SPTREE_UNLOCK(); 4350105197Ssam } 4351119643Ssam} 4352105197Ssam 4353119643Ssamstatic void 4354119643Ssamkey_flush_sad(time_t now) 4355119643Ssam{ 4356105197Ssam struct secashead *sah, *nextsah; 4357105197Ssam struct secasvar *sav, *nextsav; 4358105197Ssam 4359119643Ssam /* SAD */ 4360120585Ssam SAHTREE_LOCK(); 4361181803Sbz LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { 4362105197Ssam /* if sah has been dead, then delete it and process next sah. */ 4363105197Ssam if (sah->state == SADB_SASTATE_DEAD) { 4364105197Ssam key_delsah(sah); 4365105197Ssam continue; 4366105197Ssam } 4367105197Ssam 4368105197Ssam /* if LARVAL entry doesn't become MATURE, delete it. */ 4369120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4370190071Svanhu /* Need to also check refcnt for a larval SA ??? */ 4371181803Sbz if (now - sav->created > V_key_larval_lifetime) 4372105197Ssam KEY_FREESAV(&sav); 4373105197Ssam } 4374105197Ssam 4375105197Ssam /* 4376105197Ssam * check MATURE entry to start to send expire message 4377105197Ssam * whether or not. 4378105197Ssam */ 4379120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4380105197Ssam /* we don't need to check. */ 4381105197Ssam if (sav->lft_s == NULL) 4382105197Ssam continue; 4383105197Ssam 4384105197Ssam /* sanity check */ 4385105197Ssam if (sav->lft_c == NULL) { 4386120585Ssam ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4387120585Ssam "time, why?\n", __func__)); 4388105197Ssam continue; 4389105197Ssam } 4390105197Ssam 4391105197Ssam /* check SOFT lifetime */ 4392157123Sgnn if (sav->lft_s->addtime != 0 && 4393157123Sgnn now - sav->created > sav->lft_s->addtime) { 4394189406Svanhu key_sa_chgstate(sav, SADB_SASTATE_DYING); 4395190075Svanhu /* 4396190323Svanhu * Actually, only send expire message if 4397190323Svanhu * SA has been used, as it was done before, 4398190323Svanhu * but should we always send such message, 4399190323Svanhu * and let IKE daemon decide if it should be 4400190323Svanhu * renegotiated or not ? 4401190323Svanhu * XXX expire message will actually NOT be 4402190323Svanhu * sent if SA is only used after soft 4403190323Svanhu * lifetime has been reached, see below 4404190323Svanhu * (DYING state) 4405105197Ssam */ 4406189406Svanhu if (sav->lft_c->usetime != 0) 4407105197Ssam key_expire(sav); 4408105197Ssam } 4409105197Ssam /* check SOFT lifetime by bytes */ 4410105197Ssam /* 4411105197Ssam * XXX I don't know the way to delete this SA 4412105197Ssam * when new SA is installed. Caution when it's 4413105197Ssam * installed too big lifetime by time. 4414105197Ssam */ 4415157123Sgnn else if (sav->lft_s->bytes != 0 && 4416157123Sgnn sav->lft_s->bytes < sav->lft_c->bytes) { 4417105197Ssam 4418105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DYING); 4419105197Ssam /* 4420105197Ssam * XXX If we keep to send expire 4421105197Ssam * message in the status of 4422105197Ssam * DYING. Do remove below code. 4423105197Ssam */ 4424105197Ssam key_expire(sav); 4425105197Ssam } 4426105197Ssam } 4427105197Ssam 4428105197Ssam /* check DYING entry to change status to DEAD. */ 4429120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4430105197Ssam /* we don't need to check. */ 4431105197Ssam if (sav->lft_h == NULL) 4432105197Ssam continue; 4433105197Ssam 4434105197Ssam /* sanity check */ 4435105197Ssam if (sav->lft_c == NULL) { 4436120585Ssam ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4437120585Ssam "time, why?\n", __func__)); 4438105197Ssam continue; 4439105197Ssam } 4440105197Ssam 4441157123Sgnn if (sav->lft_h->addtime != 0 && 4442157123Sgnn now - sav->created > sav->lft_h->addtime) { 4443105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4444105197Ssam KEY_FREESAV(&sav); 4445105197Ssam } 4446105197Ssam#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4447105197Ssam else if (sav->lft_s != NULL 4448157123Sgnn && sav->lft_s->addtime != 0 4449157123Sgnn && now - sav->created > sav->lft_s->addtime) { 4450105197Ssam /* 4451105197Ssam * XXX: should be checked to be 4452105197Ssam * installed the valid SA. 4453105197Ssam */ 4454105197Ssam 4455105197Ssam /* 4456105197Ssam * If there is no SA then sending 4457105197Ssam * expire message. 4458105197Ssam */ 4459105197Ssam key_expire(sav); 4460105197Ssam } 4461105197Ssam#endif 4462105197Ssam /* check HARD lifetime by bytes */ 4463157123Sgnn else if (sav->lft_h->bytes != 0 && 4464157123Sgnn sav->lft_h->bytes < sav->lft_c->bytes) { 4465105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4466105197Ssam KEY_FREESAV(&sav); 4467105197Ssam } 4468105197Ssam } 4469105197Ssam 4470105197Ssam /* delete entry in DEAD */ 4471120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4472105197Ssam /* sanity check */ 4473105197Ssam if (sav->state != SADB_SASTATE_DEAD) { 4474120585Ssam ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4475120585Ssam "(queue: %d SA: %d): kill it anyway\n", 4476120585Ssam __func__, 4477105197Ssam SADB_SASTATE_DEAD, sav->state)); 4478105197Ssam } 4479105197Ssam /* 4480105197Ssam * do not call key_freesav() here. 4481105197Ssam * sav should already be freed, and sav->refcnt 4482105197Ssam * shows other references to sav 4483105197Ssam * (such as from SPD). 4484105197Ssam */ 4485105197Ssam } 4486105197Ssam } 4487120585Ssam SAHTREE_UNLOCK(); 4488119643Ssam} 4489105197Ssam 4490119643Ssamstatic void 4491119643Ssamkey_flush_acq(time_t now) 4492119643Ssam{ 4493105197Ssam struct secacq *acq, *nextacq; 4494105197Ssam 4495119643Ssam /* ACQ tree */ 4496120585Ssam ACQ_LOCK(); 4497181803Sbz for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 4498105197Ssam nextacq = LIST_NEXT(acq, chain); 4499181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4500105197Ssam && __LIST_CHAINED(acq)) { 4501105197Ssam LIST_REMOVE(acq, chain); 4502119643Ssam free(acq, M_IPSEC_SAQ); 4503105197Ssam } 4504105197Ssam } 4505120585Ssam ACQ_UNLOCK(); 4506119643Ssam} 4507105197Ssam 4508119643Ssamstatic void 4509119643Ssamkey_flush_spacq(time_t now) 4510119643Ssam{ 4511105197Ssam struct secspacq *acq, *nextacq; 4512105197Ssam 4513119643Ssam /* SP ACQ tree */ 4514120585Ssam SPACQ_LOCK(); 4515181803Sbz for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 4516105197Ssam nextacq = LIST_NEXT(acq, chain); 4517181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4518105197Ssam && __LIST_CHAINED(acq)) { 4519105197Ssam LIST_REMOVE(acq, chain); 4520119643Ssam free(acq, M_IPSEC_SAQ); 4521105197Ssam } 4522105197Ssam } 4523120585Ssam SPACQ_UNLOCK(); 4524119643Ssam} 4525105197Ssam 4526119643Ssam/* 4527119643Ssam * time handler. 4528119643Ssam * scanning SPD and SAD to check status for each entries, 4529119643Ssam * and do to remove or to expire. 4530119643Ssam * XXX: year 2038 problem may remain. 4531119643Ssam */ 4532119643Ssamvoid 4533119643Ssamkey_timehandler(void) 4534119643Ssam{ 4535183550Szec VNET_ITERATOR_DECL(vnet_iter); 4536119643Ssam time_t now = time_second; 4537105197Ssam 4538195760Srwatson VNET_LIST_RLOCK_NOSLEEP(); 4539183550Szec VNET_FOREACH(vnet_iter) { 4540183550Szec CURVNET_SET(vnet_iter); 4541183550Szec key_flush_spd(now); 4542183550Szec key_flush_sad(now); 4543183550Szec key_flush_acq(now); 4544183550Szec key_flush_spacq(now); 4545183550Szec CURVNET_RESTORE(); 4546183550Szec } 4547195760Srwatson VNET_LIST_RUNLOCK_NOSLEEP(); 4548119643Ssam 4549105197Ssam#ifndef IPSEC_DEBUG2 4550105197Ssam /* do exchange to tick time !! */ 4551105197Ssam (void)timeout((void *)key_timehandler, (void *)0, hz); 4552105197Ssam#endif /* IPSEC_DEBUG2 */ 4553105197Ssam} 4554105197Ssam 4555105197Ssamu_long 4556105197Ssamkey_random() 4557105197Ssam{ 4558105197Ssam u_long value; 4559105197Ssam 4560105197Ssam key_randomfill(&value, sizeof(value)); 4561105197Ssam return value; 4562105197Ssam} 4563105197Ssam 4564105197Ssamvoid 4565105197Ssamkey_randomfill(p, l) 4566105197Ssam void *p; 4567105197Ssam size_t l; 4568105197Ssam{ 4569105197Ssam size_t n; 4570105197Ssam u_long v; 4571105197Ssam static int warn = 1; 4572105197Ssam 4573105197Ssam n = 0; 4574105197Ssam n = (size_t)read_random(p, (u_int)l); 4575105197Ssam /* last resort */ 4576105197Ssam while (n < l) { 4577105197Ssam v = random(); 4578105197Ssam bcopy(&v, (u_int8_t *)p + n, 4579105197Ssam l - n < sizeof(v) ? l - n : sizeof(v)); 4580105197Ssam n += sizeof(v); 4581105197Ssam 4582105197Ssam if (warn) { 4583105197Ssam printf("WARNING: pseudo-random number generator " 4584105197Ssam "used for IPsec processing\n"); 4585105197Ssam warn = 0; 4586105197Ssam } 4587105197Ssam } 4588105197Ssam} 4589105197Ssam 4590105197Ssam/* 4591105197Ssam * map SADB_SATYPE_* to IPPROTO_*. 4592105197Ssam * if satype == SADB_SATYPE then satype is mapped to ~0. 4593105197Ssam * OUT: 4594105197Ssam * 0: invalid satype. 4595105197Ssam */ 4596105197Ssamstatic u_int16_t 4597189004Srdivackykey_satype2proto(u_int8_t satype) 4598105197Ssam{ 4599105197Ssam switch (satype) { 4600105197Ssam case SADB_SATYPE_UNSPEC: 4601105197Ssam return IPSEC_PROTO_ANY; 4602105197Ssam case SADB_SATYPE_AH: 4603105197Ssam return IPPROTO_AH; 4604105197Ssam case SADB_SATYPE_ESP: 4605105197Ssam return IPPROTO_ESP; 4606105197Ssam case SADB_X_SATYPE_IPCOMP: 4607105197Ssam return IPPROTO_IPCOMP; 4608125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 4609125680Sbms return IPPROTO_TCP; 4610105197Ssam default: 4611105197Ssam return 0; 4612105197Ssam } 4613105197Ssam /* NOTREACHED */ 4614105197Ssam} 4615105197Ssam 4616105197Ssam/* 4617105197Ssam * map IPPROTO_* to SADB_SATYPE_* 4618105197Ssam * OUT: 4619105197Ssam * 0: invalid protocol type. 4620105197Ssam */ 4621105197Ssamstatic u_int8_t 4622189004Srdivackykey_proto2satype(u_int16_t proto) 4623105197Ssam{ 4624105197Ssam switch (proto) { 4625105197Ssam case IPPROTO_AH: 4626105197Ssam return SADB_SATYPE_AH; 4627105197Ssam case IPPROTO_ESP: 4628105197Ssam return SADB_SATYPE_ESP; 4629105197Ssam case IPPROTO_IPCOMP: 4630105197Ssam return SADB_X_SATYPE_IPCOMP; 4631125680Sbms case IPPROTO_TCP: 4632125680Sbms return SADB_X_SATYPE_TCPSIGNATURE; 4633105197Ssam default: 4634105197Ssam return 0; 4635105197Ssam } 4636105197Ssam /* NOTREACHED */ 4637105197Ssam} 4638105197Ssam 4639105197Ssam/* %%% PF_KEY */ 4640105197Ssam/* 4641105197Ssam * SADB_GETSPI processing is to receive 4642105197Ssam * <base, (SA2), src address, dst address, (SPI range)> 4643105197Ssam * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4644105197Ssam * tree with the status of LARVAL, and send 4645105197Ssam * <base, SA(*), address(SD)> 4646105197Ssam * to the IKMPd. 4647105197Ssam * 4648105197Ssam * IN: mhp: pointer to the pointer to each header. 4649105197Ssam * OUT: NULL if fail. 4650105197Ssam * other if success, return pointer to the message to send. 4651105197Ssam */ 4652105197Ssamstatic int 4653105197Ssamkey_getspi(so, m, mhp) 4654105197Ssam struct socket *so; 4655105197Ssam struct mbuf *m; 4656105197Ssam const struct sadb_msghdr *mhp; 4657105197Ssam{ 4658105197Ssam struct sadb_address *src0, *dst0; 4659105197Ssam struct secasindex saidx; 4660105197Ssam struct secashead *newsah; 4661105197Ssam struct secasvar *newsav; 4662105197Ssam u_int8_t proto; 4663105197Ssam u_int32_t spi; 4664105197Ssam u_int8_t mode; 4665105197Ssam u_int32_t reqid; 4666105197Ssam int error; 4667105197Ssam 4668120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4669120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4670120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4671120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4672105197Ssam 4673105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4674105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4675120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4676120585Ssam __func__)); 4677105197Ssam return key_senderror(so, m, EINVAL); 4678105197Ssam } 4679105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4680105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4681120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4682120585Ssam __func__)); 4683105197Ssam return key_senderror(so, m, EINVAL); 4684105197Ssam } 4685105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4686105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4687105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4688105197Ssam } else { 4689105197Ssam mode = IPSEC_MODE_ANY; 4690105197Ssam reqid = 0; 4691105197Ssam } 4692105197Ssam 4693105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4694105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4695105197Ssam 4696105197Ssam /* map satype to proto */ 4697105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4698120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4699120585Ssam __func__)); 4700105197Ssam return key_senderror(so, m, EINVAL); 4701105197Ssam } 4702105197Ssam 4703194062Svanhu /* 4704194062Svanhu * Make sure the port numbers are zero. 4705194062Svanhu * In case of NAT-T we will update them later if needed. 4706194062Svanhu */ 4707105197Ssam switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4708105197Ssam case AF_INET: 4709105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4710105197Ssam sizeof(struct sockaddr_in)) 4711105197Ssam return key_senderror(so, m, EINVAL); 4712105197Ssam ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4713105197Ssam break; 4714105197Ssam case AF_INET6: 4715105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4716105197Ssam sizeof(struct sockaddr_in6)) 4717105197Ssam return key_senderror(so, m, EINVAL); 4718105197Ssam ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4719105197Ssam break; 4720105197Ssam default: 4721105197Ssam ; /*???*/ 4722105197Ssam } 4723105197Ssam switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4724105197Ssam case AF_INET: 4725105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4726105197Ssam sizeof(struct sockaddr_in)) 4727105197Ssam return key_senderror(so, m, EINVAL); 4728105197Ssam ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4729105197Ssam break; 4730105197Ssam case AF_INET6: 4731105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4732105197Ssam sizeof(struct sockaddr_in6)) 4733105197Ssam return key_senderror(so, m, EINVAL); 4734105197Ssam ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4735105197Ssam break; 4736105197Ssam default: 4737105197Ssam ; /*???*/ 4738105197Ssam } 4739105197Ssam 4740105197Ssam /* XXX boundary check against sa_len */ 4741105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4742105197Ssam 4743194062Svanhu#ifdef IPSEC_NAT_T 4744194062Svanhu /* 4745194062Svanhu * Handle NAT-T info if present. 4746194062Svanhu * We made sure the port numbers are zero above, so we do 4747194062Svanhu * not have to worry in case we do not update them. 4748194062Svanhu */ 4749194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 4750194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAi present\n", __func__)); 4751194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 4752194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAr present\n", __func__)); 4753194062Svanhu 4754194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 4755194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 4756194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 4757194062Svanhu struct sadb_x_nat_t_type *type; 4758194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 4759194062Svanhu 4760194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 4761194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 4762194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 4763194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid nat-t message " 4764194062Svanhu "passed.\n", __func__)); 4765194062Svanhu return key_senderror(so, m, EINVAL); 4766194062Svanhu } 4767194062Svanhu 4768194062Svanhu sport = (struct sadb_x_nat_t_port *) 4769194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 4770194062Svanhu dport = (struct sadb_x_nat_t_port *) 4771194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 4772194062Svanhu 4773194062Svanhu if (sport) 4774194062Svanhu KEY_PORTTOSADDR(&saidx.src, sport->sadb_x_nat_t_port_port); 4775194062Svanhu if (dport) 4776194062Svanhu KEY_PORTTOSADDR(&saidx.dst, dport->sadb_x_nat_t_port_port); 4777194062Svanhu } 4778194062Svanhu#endif 4779194062Svanhu 4780105197Ssam /* SPI allocation */ 4781105197Ssam spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4782105197Ssam &saidx); 4783105197Ssam if (spi == 0) 4784105197Ssam return key_senderror(so, m, EINVAL); 4785105197Ssam 4786105197Ssam /* get a SA index */ 4787105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 4788105197Ssam /* create a new SA index */ 4789105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 4790120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4791105197Ssam return key_senderror(so, m, ENOBUFS); 4792105197Ssam } 4793105197Ssam } 4794105197Ssam 4795105197Ssam /* get a new SA */ 4796105197Ssam /* XXX rewrite */ 4797105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4798105197Ssam if (newsav == NULL) { 4799105197Ssam /* XXX don't free new SA index allocated in above. */ 4800105197Ssam return key_senderror(so, m, error); 4801105197Ssam } 4802105197Ssam 4803105197Ssam /* set spi */ 4804105197Ssam newsav->spi = htonl(spi); 4805105197Ssam 4806105197Ssam /* delete the entry in acqtree */ 4807105197Ssam if (mhp->msg->sadb_msg_seq != 0) { 4808105197Ssam struct secacq *acq; 4809105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4810105197Ssam /* reset counter in order to deletion by timehandler. */ 4811105197Ssam acq->created = time_second; 4812105197Ssam acq->count = 0; 4813105197Ssam } 4814105197Ssam } 4815105197Ssam 4816105197Ssam { 4817105197Ssam struct mbuf *n, *nn; 4818105197Ssam struct sadb_sa *m_sa; 4819105197Ssam struct sadb_msg *newmsg; 4820105197Ssam int off, len; 4821105197Ssam 4822105197Ssam /* create new sadb_msg to reply. */ 4823105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4824105197Ssam PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4825105197Ssam 4826111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 4827105197Ssam if (len > MHLEN) { 4828111119Simp MCLGET(n, M_DONTWAIT); 4829105197Ssam if ((n->m_flags & M_EXT) == 0) { 4830105197Ssam m_freem(n); 4831105197Ssam n = NULL; 4832105197Ssam } 4833105197Ssam } 4834105197Ssam if (!n) 4835105197Ssam return key_senderror(so, m, ENOBUFS); 4836105197Ssam 4837105197Ssam n->m_len = len; 4838105197Ssam n->m_next = NULL; 4839105197Ssam off = 0; 4840105197Ssam 4841105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4842105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4843105197Ssam 4844105197Ssam m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4845105197Ssam m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4846105197Ssam m_sa->sadb_sa_exttype = SADB_EXT_SA; 4847105197Ssam m_sa->sadb_sa_spi = htonl(spi); 4848105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4849105197Ssam 4850120585Ssam IPSEC_ASSERT(off == len, 4851120585Ssam ("length inconsistency (off %u len %u)", off, len)); 4852105197Ssam 4853105197Ssam n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4854105197Ssam SADB_EXT_ADDRESS_DST); 4855105197Ssam if (!n->m_next) { 4856105197Ssam m_freem(n); 4857105197Ssam return key_senderror(so, m, ENOBUFS); 4858105197Ssam } 4859105197Ssam 4860105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 4861105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 4862105197Ssam if (n == NULL) 4863105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4864105197Ssam } 4865105197Ssam 4866105197Ssam n->m_pkthdr.len = 0; 4867105197Ssam for (nn = n; nn; nn = nn->m_next) 4868105197Ssam n->m_pkthdr.len += nn->m_len; 4869105197Ssam 4870105197Ssam newmsg = mtod(n, struct sadb_msg *); 4871105197Ssam newmsg->sadb_msg_seq = newsav->seq; 4872105197Ssam newmsg->sadb_msg_errno = 0; 4873105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4874105197Ssam 4875105197Ssam m_freem(m); 4876105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4877105197Ssam } 4878105197Ssam} 4879105197Ssam 4880105197Ssam/* 4881105197Ssam * allocating new SPI 4882105197Ssam * called by key_getspi(). 4883105197Ssam * OUT: 4884105197Ssam * 0: failure. 4885105197Ssam * others: success. 4886105197Ssam */ 4887105197Ssamstatic u_int32_t 4888105197Ssamkey_do_getnewspi(spirange, saidx) 4889105197Ssam struct sadb_spirange *spirange; 4890105197Ssam struct secasindex *saidx; 4891105197Ssam{ 4892105197Ssam u_int32_t newspi; 4893105197Ssam u_int32_t min, max; 4894181803Sbz int count = V_key_spi_trycnt; 4895105197Ssam 4896105197Ssam /* set spi range to allocate */ 4897105197Ssam if (spirange != NULL) { 4898105197Ssam min = spirange->sadb_spirange_min; 4899105197Ssam max = spirange->sadb_spirange_max; 4900105197Ssam } else { 4901181803Sbz min = V_key_spi_minval; 4902181803Sbz max = V_key_spi_maxval; 4903105197Ssam } 4904105197Ssam /* IPCOMP needs 2-byte SPI */ 4905105197Ssam if (saidx->proto == IPPROTO_IPCOMP) { 4906105197Ssam u_int32_t t; 4907105197Ssam if (min >= 0x10000) 4908105197Ssam min = 0xffff; 4909105197Ssam if (max >= 0x10000) 4910105197Ssam max = 0xffff; 4911105197Ssam if (min > max) { 4912105197Ssam t = min; min = max; max = t; 4913105197Ssam } 4914105197Ssam } 4915105197Ssam 4916105197Ssam if (min == max) { 4917105197Ssam if (key_checkspidup(saidx, min) != NULL) { 4918120585Ssam ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4919120585Ssam __func__, min)); 4920105197Ssam return 0; 4921105197Ssam } 4922105197Ssam 4923105197Ssam count--; /* taking one cost. */ 4924105197Ssam newspi = min; 4925105197Ssam 4926105197Ssam } else { 4927105197Ssam 4928105197Ssam /* init SPI */ 4929105197Ssam newspi = 0; 4930105197Ssam 4931105197Ssam /* when requesting to allocate spi ranged */ 4932105197Ssam while (count--) { 4933105197Ssam /* generate pseudo-random SPI value ranged. */ 4934105197Ssam newspi = min + (key_random() % (max - min + 1)); 4935105197Ssam 4936105197Ssam if (key_checkspidup(saidx, newspi) == NULL) 4937105197Ssam break; 4938105197Ssam } 4939105197Ssam 4940105197Ssam if (count == 0 || newspi == 0) { 4941120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4942120585Ssam __func__)); 4943105197Ssam return 0; 4944105197Ssam } 4945105197Ssam } 4946105197Ssam 4947105197Ssam /* statistics */ 4948105197Ssam keystat.getspi_count = 4949181803Sbz (keystat.getspi_count + V_key_spi_trycnt - count) / 2; 4950105197Ssam 4951105197Ssam return newspi; 4952105197Ssam} 4953105197Ssam 4954105197Ssam/* 4955105197Ssam * SADB_UPDATE processing 4956105197Ssam * receive 4957105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4958105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4959105197Ssam * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4960105197Ssam * and send 4961105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4962105197Ssam * (identity(SD),) (sensitivity)> 4963105197Ssam * to the ikmpd. 4964105197Ssam * 4965105197Ssam * m will always be freed. 4966105197Ssam */ 4967105197Ssamstatic int 4968105197Ssamkey_update(so, m, mhp) 4969105197Ssam struct socket *so; 4970105197Ssam struct mbuf *m; 4971105197Ssam const struct sadb_msghdr *mhp; 4972105197Ssam{ 4973105197Ssam struct sadb_sa *sa0; 4974105197Ssam struct sadb_address *src0, *dst0; 4975194062Svanhu#ifdef IPSEC_NAT_T 4976194062Svanhu struct sadb_x_nat_t_type *type; 4977194513Sbz struct sadb_x_nat_t_port *sport, *dport; 4978194062Svanhu struct sadb_address *iaddr, *raddr; 4979194062Svanhu struct sadb_x_nat_t_frag *frag; 4980194062Svanhu#endif 4981105197Ssam struct secasindex saidx; 4982105197Ssam struct secashead *sah; 4983105197Ssam struct secasvar *sav; 4984105197Ssam u_int16_t proto; 4985105197Ssam u_int8_t mode; 4986105197Ssam u_int32_t reqid; 4987105197Ssam int error; 4988105197Ssam 4989120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4990120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4991120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4992120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4993105197Ssam 4994105197Ssam /* map satype to proto */ 4995105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4996120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4997120585Ssam __func__)); 4998105197Ssam return key_senderror(so, m, EINVAL); 4999105197Ssam } 5000105197Ssam 5001105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5002105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5003105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5004105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5005105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5006105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5007105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5008105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5009105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5010105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5011105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5012120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5013120585Ssam __func__)); 5014105197Ssam return key_senderror(so, m, EINVAL); 5015105197Ssam } 5016105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5017105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5018105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5019120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5020120585Ssam __func__)); 5021105197Ssam return key_senderror(so, m, EINVAL); 5022105197Ssam } 5023105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5024105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5025105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5026105197Ssam } else { 5027105197Ssam mode = IPSEC_MODE_ANY; 5028105197Ssam reqid = 0; 5029105197Ssam } 5030105197Ssam /* XXX boundary checking for other extensions */ 5031105197Ssam 5032105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5033105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5034105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5035105197Ssam 5036105197Ssam /* XXX boundary check against sa_len */ 5037105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5038105197Ssam 5039194062Svanhu /* 5040194062Svanhu * Make sure the port numbers are zero. 5041194062Svanhu * In case of NAT-T we will update them later if needed. 5042194062Svanhu */ 5043194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5044194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5045194062Svanhu 5046194062Svanhu#ifdef IPSEC_NAT_T 5047194062Svanhu /* 5048194062Svanhu * Handle NAT-T info if present. 5049194062Svanhu */ 5050194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5051194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5052194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5053194062Svanhu 5054194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5055194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5056194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5057194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5058194062Svanhu __func__)); 5059194062Svanhu return key_senderror(so, m, EINVAL); 5060194062Svanhu } 5061194062Svanhu 5062194062Svanhu type = (struct sadb_x_nat_t_type *) 5063194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5064194062Svanhu sport = (struct sadb_x_nat_t_port *) 5065194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5066194062Svanhu dport = (struct sadb_x_nat_t_port *) 5067194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5068194062Svanhu } else { 5069194062Svanhu type = 0; 5070194513Sbz sport = dport = 0; 5071194062Svanhu } 5072194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5073194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5074194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5075194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5076194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5077194062Svanhu __func__)); 5078194062Svanhu return key_senderror(so, m, EINVAL); 5079194062Svanhu } 5080194062Svanhu iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5081194062Svanhu raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5082194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5083194062Svanhu } else { 5084194062Svanhu iaddr = raddr = NULL; 5085194062Svanhu } 5086194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5087194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5088194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5089194062Svanhu __func__)); 5090194062Svanhu return key_senderror(so, m, EINVAL); 5091194062Svanhu } 5092194062Svanhu frag = (struct sadb_x_nat_t_frag *) 5093194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5094194062Svanhu } else { 5095194062Svanhu frag = 0; 5096194062Svanhu } 5097194062Svanhu#endif 5098194062Svanhu 5099105197Ssam /* get a SA header */ 5100105197Ssam if ((sah = key_getsah(&saidx)) == NULL) { 5101120585Ssam ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 5102105197Ssam return key_senderror(so, m, ENOENT); 5103105197Ssam } 5104105197Ssam 5105105197Ssam /* set spidx if there */ 5106105197Ssam /* XXX rewrite */ 5107105197Ssam error = key_setident(sah, m, mhp); 5108105197Ssam if (error) 5109105197Ssam return key_senderror(so, m, error); 5110105197Ssam 5111105197Ssam /* find a SA with sequence number. */ 5112105197Ssam#ifdef IPSEC_DOSEQCHECK 5113105197Ssam if (mhp->msg->sadb_msg_seq != 0 5114105197Ssam && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5115120585Ssam ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 5116120585Ssam "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 5117105197Ssam return key_senderror(so, m, ENOENT); 5118105197Ssam } 5119105197Ssam#else 5120120585Ssam SAHTREE_LOCK(); 5121120585Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5122120585Ssam SAHTREE_UNLOCK(); 5123120585Ssam if (sav == NULL) { 5124120585Ssam ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 5125120585Ssam __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5126105197Ssam return key_senderror(so, m, EINVAL); 5127105197Ssam } 5128105197Ssam#endif 5129105197Ssam 5130105197Ssam /* validity check */ 5131105197Ssam if (sav->sah->saidx.proto != proto) { 5132120585Ssam ipseclog((LOG_DEBUG, "%s: protocol mismatched " 5133120585Ssam "(DB=%u param=%u)\n", __func__, 5134120585Ssam sav->sah->saidx.proto, proto)); 5135105197Ssam return key_senderror(so, m, EINVAL); 5136105197Ssam } 5137105197Ssam#ifdef IPSEC_DOSEQCHECK 5138105197Ssam if (sav->spi != sa0->sadb_sa_spi) { 5139120585Ssam ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 5140120585Ssam __func__, 5141105197Ssam (u_int32_t)ntohl(sav->spi), 5142105197Ssam (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5143105197Ssam return key_senderror(so, m, EINVAL); 5144105197Ssam } 5145105197Ssam#endif 5146105197Ssam if (sav->pid != mhp->msg->sadb_msg_pid) { 5147120585Ssam ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 5148120585Ssam __func__, sav->pid, mhp->msg->sadb_msg_pid)); 5149105197Ssam return key_senderror(so, m, EINVAL); 5150105197Ssam } 5151105197Ssam 5152105197Ssam /* copy sav values */ 5153105197Ssam error = key_setsaval(sav, m, mhp); 5154105197Ssam if (error) { 5155105197Ssam KEY_FREESAV(&sav); 5156105197Ssam return key_senderror(so, m, error); 5157105197Ssam } 5158105197Ssam 5159194062Svanhu#ifdef IPSEC_NAT_T 5160194062Svanhu /* 5161194062Svanhu * Handle more NAT-T info if present, 5162194062Svanhu * now that we have a sav to fill. 5163194062Svanhu */ 5164194062Svanhu if (type) 5165194062Svanhu sav->natt_type = type->sadb_x_nat_t_type_type; 5166194062Svanhu 5167194513Sbz if (sport) 5168194513Sbz KEY_PORTTOSADDR(&sav->sah->saidx.src, 5169194513Sbz sport->sadb_x_nat_t_port_port); 5170194513Sbz if (dport) 5171194513Sbz KEY_PORTTOSADDR(&sav->sah->saidx.dst, 5172194513Sbz dport->sadb_x_nat_t_port_port); 5173194513Sbz 5174194062Svanhu#if 0 5175194062Svanhu /* 5176194062Svanhu * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5177194062Svanhu * We should actually check for a minimum MTU here, if we 5178194062Svanhu * want to support it in ip_output. 5179194062Svanhu */ 5180194062Svanhu if (frag) 5181194062Svanhu sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5182194062Svanhu#endif 5183194062Svanhu#endif 5184194062Svanhu 5185207651Svanhu /* check SA values to be mature. */ 5186207651Svanhu if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5187207651Svanhu KEY_FREESAV(&sav); 5188207651Svanhu return key_senderror(so, m, 0); 5189207651Svanhu } 5190207651Svanhu 5191105197Ssam { 5192105197Ssam struct mbuf *n; 5193105197Ssam 5194105197Ssam /* set msg buf from mhp */ 5195105197Ssam n = key_getmsgbuf_x1(m, mhp); 5196105197Ssam if (n == NULL) { 5197120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5198105197Ssam return key_senderror(so, m, ENOBUFS); 5199105197Ssam } 5200105197Ssam 5201105197Ssam m_freem(m); 5202105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5203105197Ssam } 5204105197Ssam} 5205105197Ssam 5206105197Ssam/* 5207105197Ssam * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5208105197Ssam * only called by key_update(). 5209105197Ssam * OUT: 5210105197Ssam * NULL : not found 5211105197Ssam * others : found, pointer to a SA. 5212105197Ssam */ 5213105197Ssam#ifdef IPSEC_DOSEQCHECK 5214105197Ssamstatic struct secasvar * 5215105197Ssamkey_getsavbyseq(sah, seq) 5216105197Ssam struct secashead *sah; 5217105197Ssam u_int32_t seq; 5218105197Ssam{ 5219105197Ssam struct secasvar *sav; 5220105197Ssam u_int state; 5221105197Ssam 5222105197Ssam state = SADB_SASTATE_LARVAL; 5223105197Ssam 5224105197Ssam /* search SAD with sequence number ? */ 5225105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 5226105197Ssam 5227120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 5228105197Ssam 5229105197Ssam if (sav->seq == seq) { 5230158767Spjd sa_addref(sav); 5231105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5232120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 5233120585Ssam __func__, sav->refcnt, sav)); 5234105197Ssam return sav; 5235105197Ssam } 5236105197Ssam } 5237105197Ssam 5238105197Ssam return NULL; 5239105197Ssam} 5240105197Ssam#endif 5241105197Ssam 5242105197Ssam/* 5243105197Ssam * SADB_ADD processing 5244108533Sschweikh * add an entry to SA database, when received 5245105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5246105197Ssam * key(AE), (identity(SD),) (sensitivity)> 5247105197Ssam * from the ikmpd, 5248105197Ssam * and send 5249105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5250105197Ssam * (identity(SD),) (sensitivity)> 5251105197Ssam * to the ikmpd. 5252105197Ssam * 5253105197Ssam * IGNORE identity and sensitivity messages. 5254105197Ssam * 5255105197Ssam * m will always be freed. 5256105197Ssam */ 5257105197Ssamstatic int 5258105197Ssamkey_add(so, m, mhp) 5259105197Ssam struct socket *so; 5260105197Ssam struct mbuf *m; 5261105197Ssam const struct sadb_msghdr *mhp; 5262105197Ssam{ 5263105197Ssam struct sadb_sa *sa0; 5264105197Ssam struct sadb_address *src0, *dst0; 5265194062Svanhu#ifdef IPSEC_NAT_T 5266194062Svanhu struct sadb_x_nat_t_type *type; 5267194062Svanhu struct sadb_address *iaddr, *raddr; 5268194062Svanhu struct sadb_x_nat_t_frag *frag; 5269194062Svanhu#endif 5270105197Ssam struct secasindex saidx; 5271105197Ssam struct secashead *newsah; 5272105197Ssam struct secasvar *newsav; 5273105197Ssam u_int16_t proto; 5274105197Ssam u_int8_t mode; 5275105197Ssam u_int32_t reqid; 5276105197Ssam int error; 5277105197Ssam 5278120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5279120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5280120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5281120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5282105197Ssam 5283105197Ssam /* map satype to proto */ 5284105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5285120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5286120585Ssam __func__)); 5287105197Ssam return key_senderror(so, m, EINVAL); 5288105197Ssam } 5289105197Ssam 5290105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5291105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5292105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5293105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5294105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5295105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5296105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5297105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5298105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5299105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5300105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5301120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5302120585Ssam __func__)); 5303105197Ssam return key_senderror(so, m, EINVAL); 5304105197Ssam } 5305105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5306105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5307105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5308105197Ssam /* XXX need more */ 5309120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5310120585Ssam __func__)); 5311105197Ssam return key_senderror(so, m, EINVAL); 5312105197Ssam } 5313105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5314105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5315105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5316105197Ssam } else { 5317105197Ssam mode = IPSEC_MODE_ANY; 5318105197Ssam reqid = 0; 5319105197Ssam } 5320105197Ssam 5321105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5322105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5323105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5324105197Ssam 5325105197Ssam /* XXX boundary check against sa_len */ 5326105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5327105197Ssam 5328194062Svanhu /* 5329194062Svanhu * Make sure the port numbers are zero. 5330194062Svanhu * In case of NAT-T we will update them later if needed. 5331194062Svanhu */ 5332194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5333194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5334194062Svanhu 5335194062Svanhu#ifdef IPSEC_NAT_T 5336194062Svanhu /* 5337194062Svanhu * Handle NAT-T info if present. 5338194062Svanhu */ 5339194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5340194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5341194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5342194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5343194062Svanhu 5344194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5345194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5346194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5347194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5348194062Svanhu __func__)); 5349194062Svanhu return key_senderror(so, m, EINVAL); 5350194062Svanhu } 5351194062Svanhu 5352194062Svanhu type = (struct sadb_x_nat_t_type *) 5353194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5354194062Svanhu sport = (struct sadb_x_nat_t_port *) 5355194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5356194062Svanhu dport = (struct sadb_x_nat_t_port *) 5357194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5358194062Svanhu 5359194062Svanhu if (sport) 5360194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5361194062Svanhu sport->sadb_x_nat_t_port_port); 5362194062Svanhu if (dport) 5363194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5364194062Svanhu dport->sadb_x_nat_t_port_port); 5365194062Svanhu } else { 5366194062Svanhu type = 0; 5367194062Svanhu } 5368194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5369194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5370194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5371194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5372194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5373194062Svanhu __func__)); 5374194062Svanhu return key_senderror(so, m, EINVAL); 5375194062Svanhu } 5376194062Svanhu iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5377194062Svanhu raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5378194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5379194062Svanhu } else { 5380194062Svanhu iaddr = raddr = NULL; 5381194062Svanhu } 5382194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5383194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5384194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5385194062Svanhu __func__)); 5386194062Svanhu return key_senderror(so, m, EINVAL); 5387194062Svanhu } 5388194062Svanhu frag = (struct sadb_x_nat_t_frag *) 5389194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5390194062Svanhu } else { 5391194062Svanhu frag = 0; 5392194062Svanhu } 5393194062Svanhu#endif 5394194062Svanhu 5395105197Ssam /* get a SA header */ 5396105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 5397105197Ssam /* create a new SA header */ 5398105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 5399120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 5400105197Ssam return key_senderror(so, m, ENOBUFS); 5401105197Ssam } 5402105197Ssam } 5403105197Ssam 5404105197Ssam /* set spidx if there */ 5405105197Ssam /* XXX rewrite */ 5406105197Ssam error = key_setident(newsah, m, mhp); 5407105197Ssam if (error) { 5408105197Ssam return key_senderror(so, m, error); 5409105197Ssam } 5410105197Ssam 5411105197Ssam /* create new SA entry. */ 5412105197Ssam /* We can create new SA only if SPI is differenct. */ 5413120585Ssam SAHTREE_LOCK(); 5414120585Ssam newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5415120585Ssam SAHTREE_UNLOCK(); 5416120585Ssam if (newsav != NULL) { 5417120585Ssam ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 5418105197Ssam return key_senderror(so, m, EEXIST); 5419105197Ssam } 5420105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5421105197Ssam if (newsav == NULL) { 5422105197Ssam return key_senderror(so, m, error); 5423105197Ssam } 5424105197Ssam 5425105197Ssam /* check SA values to be mature. */ 5426105197Ssam if ((error = key_mature(newsav)) != 0) { 5427105197Ssam KEY_FREESAV(&newsav); 5428105197Ssam return key_senderror(so, m, error); 5429105197Ssam } 5430105197Ssam 5431194062Svanhu#ifdef IPSEC_NAT_T 5432105197Ssam /* 5433194062Svanhu * Handle more NAT-T info if present, 5434194062Svanhu * now that we have a sav to fill. 5435194062Svanhu */ 5436194062Svanhu if (type) 5437194062Svanhu newsav->natt_type = type->sadb_x_nat_t_type_type; 5438194062Svanhu 5439194062Svanhu#if 0 5440194062Svanhu /* 5441194062Svanhu * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5442194062Svanhu * We should actually check for a minimum MTU here, if we 5443194062Svanhu * want to support it in ip_output. 5444194062Svanhu */ 5445194062Svanhu if (frag) 5446194062Svanhu newsav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5447194062Svanhu#endif 5448194062Svanhu#endif 5449194062Svanhu 5450194062Svanhu /* 5451105197Ssam * don't call key_freesav() here, as we would like to keep the SA 5452105197Ssam * in the database on success. 5453105197Ssam */ 5454105197Ssam 5455105197Ssam { 5456105197Ssam struct mbuf *n; 5457105197Ssam 5458105197Ssam /* set msg buf from mhp */ 5459105197Ssam n = key_getmsgbuf_x1(m, mhp); 5460105197Ssam if (n == NULL) { 5461120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5462105197Ssam return key_senderror(so, m, ENOBUFS); 5463105197Ssam } 5464105197Ssam 5465105197Ssam m_freem(m); 5466105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5467105197Ssam } 5468105197Ssam} 5469105197Ssam 5470105197Ssam/* m is retained */ 5471105197Ssamstatic int 5472105197Ssamkey_setident(sah, m, mhp) 5473105197Ssam struct secashead *sah; 5474105197Ssam struct mbuf *m; 5475105197Ssam const struct sadb_msghdr *mhp; 5476105197Ssam{ 5477105197Ssam const struct sadb_ident *idsrc, *iddst; 5478105197Ssam int idsrclen, iddstlen; 5479105197Ssam 5480120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 5481120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5482120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5483120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5484105197Ssam 5485105197Ssam /* don't make buffer if not there */ 5486105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5487105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5488105197Ssam sah->idents = NULL; 5489105197Ssam sah->identd = NULL; 5490105197Ssam return 0; 5491105197Ssam } 5492105197Ssam 5493105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5494105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5495120585Ssam ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 5496105197Ssam return EINVAL; 5497105197Ssam } 5498105197Ssam 5499105197Ssam idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5500105197Ssam iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5501105197Ssam idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5502105197Ssam iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5503105197Ssam 5504105197Ssam /* validity check */ 5505105197Ssam if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5506120585Ssam ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 5507105197Ssam return EINVAL; 5508105197Ssam } 5509105197Ssam 5510105197Ssam switch (idsrc->sadb_ident_type) { 5511105197Ssam case SADB_IDENTTYPE_PREFIX: 5512105197Ssam case SADB_IDENTTYPE_FQDN: 5513105197Ssam case SADB_IDENTTYPE_USERFQDN: 5514105197Ssam default: 5515105197Ssam /* XXX do nothing */ 5516105197Ssam sah->idents = NULL; 5517105197Ssam sah->identd = NULL; 5518105197Ssam return 0; 5519105197Ssam } 5520105197Ssam 5521105197Ssam /* make structure */ 5522157123Sgnn sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5523105197Ssam if (sah->idents == NULL) { 5524120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5525105197Ssam return ENOBUFS; 5526105197Ssam } 5527157123Sgnn sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5528105197Ssam if (sah->identd == NULL) { 5529119643Ssam free(sah->idents, M_IPSEC_MISC); 5530105197Ssam sah->idents = NULL; 5531120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5532105197Ssam return ENOBUFS; 5533105197Ssam } 5534157123Sgnn sah->idents->type = idsrc->sadb_ident_type; 5535157123Sgnn sah->idents->id = idsrc->sadb_ident_id; 5536105197Ssam 5537157123Sgnn sah->identd->type = iddst->sadb_ident_type; 5538157123Sgnn sah->identd->id = iddst->sadb_ident_id; 5539157123Sgnn 5540105197Ssam return 0; 5541105197Ssam} 5542105197Ssam 5543105197Ssam/* 5544105197Ssam * m will not be freed on return. 5545105197Ssam * it is caller's responsibility to free the result. 5546105197Ssam */ 5547105197Ssamstatic struct mbuf * 5548105197Ssamkey_getmsgbuf_x1(m, mhp) 5549105197Ssam struct mbuf *m; 5550105197Ssam const struct sadb_msghdr *mhp; 5551105197Ssam{ 5552105197Ssam struct mbuf *n; 5553105197Ssam 5554120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5555120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5556120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5557105197Ssam 5558105197Ssam /* create new sadb_msg to reply. */ 5559105197Ssam n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5560105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 5561105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5562105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5563105197Ssam SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5564105197Ssam if (!n) 5565105197Ssam return NULL; 5566105197Ssam 5567105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5568105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5569105197Ssam if (n == NULL) 5570105197Ssam return NULL; 5571105197Ssam } 5572105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5573105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_len = 5574105197Ssam PFKEY_UNIT64(n->m_pkthdr.len); 5575105197Ssam 5576105197Ssam return n; 5577105197Ssam} 5578105197Ssam 5579105197Ssamstatic int key_delete_all __P((struct socket *, struct mbuf *, 5580105197Ssam const struct sadb_msghdr *, u_int16_t)); 5581105197Ssam 5582105197Ssam/* 5583105197Ssam * SADB_DELETE processing 5584105197Ssam * receive 5585105197Ssam * <base, SA(*), address(SD)> 5586105197Ssam * from the ikmpd, and set SADB_SASTATE_DEAD, 5587105197Ssam * and send, 5588105197Ssam * <base, SA(*), address(SD)> 5589105197Ssam * to the ikmpd. 5590105197Ssam * 5591105197Ssam * m will always be freed. 5592105197Ssam */ 5593105197Ssamstatic int 5594105197Ssamkey_delete(so, m, mhp) 5595105197Ssam struct socket *so; 5596105197Ssam struct mbuf *m; 5597105197Ssam const struct sadb_msghdr *mhp; 5598105197Ssam{ 5599105197Ssam struct sadb_sa *sa0; 5600105197Ssam struct sadb_address *src0, *dst0; 5601105197Ssam struct secasindex saidx; 5602105197Ssam struct secashead *sah; 5603105197Ssam struct secasvar *sav = NULL; 5604105197Ssam u_int16_t proto; 5605105197Ssam 5606120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5607120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5608120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5609120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5610105197Ssam 5611105197Ssam /* map satype to proto */ 5612105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5613120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5614120585Ssam __func__)); 5615105197Ssam return key_senderror(so, m, EINVAL); 5616105197Ssam } 5617105197Ssam 5618105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5619105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5620120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5621120585Ssam __func__)); 5622105197Ssam return key_senderror(so, m, EINVAL); 5623105197Ssam } 5624105197Ssam 5625105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5626105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5627120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5628120585Ssam __func__)); 5629105197Ssam return key_senderror(so, m, EINVAL); 5630105197Ssam } 5631105197Ssam 5632105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 5633105197Ssam /* 5634105197Ssam * Caller wants us to delete all non-LARVAL SAs 5635105197Ssam * that match the src/dst. This is used during 5636105197Ssam * IKE INITIAL-CONTACT. 5637105197Ssam */ 5638120585Ssam ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5639105197Ssam return key_delete_all(so, m, mhp, proto); 5640105197Ssam } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5641120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5642120585Ssam __func__)); 5643105197Ssam return key_senderror(so, m, EINVAL); 5644105197Ssam } 5645105197Ssam 5646105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5647105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5648105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5649105197Ssam 5650105197Ssam /* XXX boundary check against sa_len */ 5651105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5652105197Ssam 5653194062Svanhu /* 5654194062Svanhu * Make sure the port numbers are zero. 5655194062Svanhu * In case of NAT-T we will update them later if needed. 5656194062Svanhu */ 5657194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5658194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5659194062Svanhu 5660194062Svanhu#ifdef IPSEC_NAT_T 5661194062Svanhu /* 5662194062Svanhu * Handle NAT-T info if present. 5663194062Svanhu */ 5664194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5665194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5666194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5667194062Svanhu 5668194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5669194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5670194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5671194062Svanhu __func__)); 5672194062Svanhu return key_senderror(so, m, EINVAL); 5673194062Svanhu } 5674194062Svanhu 5675194062Svanhu sport = (struct sadb_x_nat_t_port *) 5676194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5677194062Svanhu dport = (struct sadb_x_nat_t_port *) 5678194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5679194062Svanhu 5680194062Svanhu if (sport) 5681194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5682194062Svanhu sport->sadb_x_nat_t_port_port); 5683194062Svanhu if (dport) 5684194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5685194062Svanhu dport->sadb_x_nat_t_port_port); 5686194062Svanhu } 5687194062Svanhu#endif 5688194062Svanhu 5689105197Ssam /* get a SA header */ 5690120585Ssam SAHTREE_LOCK(); 5691181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5692105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5693105197Ssam continue; 5694105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5695105197Ssam continue; 5696105197Ssam 5697105197Ssam /* get a SA with SPI. */ 5698105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5699105197Ssam if (sav) 5700105197Ssam break; 5701105197Ssam } 5702105197Ssam if (sah == NULL) { 5703120585Ssam SAHTREE_UNLOCK(); 5704120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5705105197Ssam return key_senderror(so, m, ENOENT); 5706105197Ssam } 5707105197Ssam 5708105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5709199398Svanhu KEY_FREESAV(&sav); 5710120585Ssam SAHTREE_UNLOCK(); 5711105197Ssam 5712105197Ssam { 5713105197Ssam struct mbuf *n; 5714105197Ssam struct sadb_msg *newmsg; 5715105197Ssam 5716105197Ssam /* create new sadb_msg to reply. */ 5717194062Svanhu /* XXX-BZ NAT-T extensions? */ 5718105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5719105197Ssam SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5720105197Ssam if (!n) 5721105197Ssam return key_senderror(so, m, ENOBUFS); 5722105197Ssam 5723105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5724105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5725105197Ssam if (n == NULL) 5726105197Ssam return key_senderror(so, m, ENOBUFS); 5727105197Ssam } 5728105197Ssam newmsg = mtod(n, struct sadb_msg *); 5729105197Ssam newmsg->sadb_msg_errno = 0; 5730105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5731105197Ssam 5732105197Ssam m_freem(m); 5733105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5734105197Ssam } 5735105197Ssam} 5736105197Ssam 5737105197Ssam/* 5738105197Ssam * delete all SAs for src/dst. Called from key_delete(). 5739105197Ssam */ 5740105197Ssamstatic int 5741189004Srdivackykey_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, 5742189004Srdivacky u_int16_t proto) 5743105197Ssam{ 5744105197Ssam struct sadb_address *src0, *dst0; 5745105197Ssam struct secasindex saidx; 5746105197Ssam struct secashead *sah; 5747105197Ssam struct secasvar *sav, *nextsav; 5748105197Ssam u_int stateidx, state; 5749105197Ssam 5750105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5751105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5752105197Ssam 5753105197Ssam /* XXX boundary check against sa_len */ 5754105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5755105197Ssam 5756194062Svanhu /* 5757194062Svanhu * Make sure the port numbers are zero. 5758194062Svanhu * In case of NAT-T we will update them later if needed. 5759194062Svanhu */ 5760194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5761194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5762194062Svanhu 5763194062Svanhu#ifdef IPSEC_NAT_T 5764194062Svanhu /* 5765194062Svanhu * Handle NAT-T info if present. 5766194062Svanhu */ 5767194062Svanhu 5768194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5769194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5770194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5771194062Svanhu 5772194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5773194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5774194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5775194062Svanhu __func__)); 5776194062Svanhu return key_senderror(so, m, EINVAL); 5777194062Svanhu } 5778194062Svanhu 5779194062Svanhu sport = (struct sadb_x_nat_t_port *) 5780194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5781194062Svanhu dport = (struct sadb_x_nat_t_port *) 5782194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5783194062Svanhu 5784194062Svanhu if (sport) 5785194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5786194062Svanhu sport->sadb_x_nat_t_port_port); 5787194062Svanhu if (dport) 5788194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5789194062Svanhu dport->sadb_x_nat_t_port_port); 5790194062Svanhu } 5791194062Svanhu#endif 5792194062Svanhu 5793120585Ssam SAHTREE_LOCK(); 5794181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5795105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5796105197Ssam continue; 5797105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5798105197Ssam continue; 5799105197Ssam 5800105197Ssam /* Delete all non-LARVAL SAs. */ 5801105197Ssam for (stateidx = 0; 5802185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 5803105197Ssam stateidx++) { 5804185348Szec state = saorder_state_alive[stateidx]; 5805105197Ssam if (state == SADB_SASTATE_LARVAL) 5806105197Ssam continue; 5807105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 5808105197Ssam sav != NULL; sav = nextsav) { 5809105197Ssam nextsav = LIST_NEXT(sav, chain); 5810105197Ssam /* sanity check */ 5811105197Ssam if (sav->state != state) { 5812120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 5813120585Ssam "sav->state (queue %d SA %d)\n", 5814120585Ssam __func__, state, sav->state)); 5815105197Ssam continue; 5816105197Ssam } 5817105197Ssam 5818105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5819105197Ssam KEY_FREESAV(&sav); 5820105197Ssam } 5821105197Ssam } 5822105197Ssam } 5823120585Ssam SAHTREE_UNLOCK(); 5824105197Ssam { 5825105197Ssam struct mbuf *n; 5826105197Ssam struct sadb_msg *newmsg; 5827105197Ssam 5828105197Ssam /* create new sadb_msg to reply. */ 5829194062Svanhu /* XXX-BZ NAT-T extensions? */ 5830105197Ssam n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5831105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5832105197Ssam if (!n) 5833105197Ssam return key_senderror(so, m, ENOBUFS); 5834105197Ssam 5835105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5836105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5837105197Ssam if (n == NULL) 5838105197Ssam return key_senderror(so, m, ENOBUFS); 5839105197Ssam } 5840105197Ssam newmsg = mtod(n, struct sadb_msg *); 5841105197Ssam newmsg->sadb_msg_errno = 0; 5842105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5843105197Ssam 5844105197Ssam m_freem(m); 5845105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5846105197Ssam } 5847105197Ssam} 5848105197Ssam 5849105197Ssam/* 5850105197Ssam * SADB_GET processing 5851105197Ssam * receive 5852105197Ssam * <base, SA(*), address(SD)> 5853105197Ssam * from the ikmpd, and get a SP and a SA to respond, 5854105197Ssam * and send, 5855105197Ssam * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5856105197Ssam * (identity(SD),) (sensitivity)> 5857105197Ssam * to the ikmpd. 5858105197Ssam * 5859105197Ssam * m will always be freed. 5860105197Ssam */ 5861105197Ssamstatic int 5862105197Ssamkey_get(so, m, mhp) 5863105197Ssam struct socket *so; 5864105197Ssam struct mbuf *m; 5865105197Ssam const struct sadb_msghdr *mhp; 5866105197Ssam{ 5867105197Ssam struct sadb_sa *sa0; 5868105197Ssam struct sadb_address *src0, *dst0; 5869105197Ssam struct secasindex saidx; 5870105197Ssam struct secashead *sah; 5871105197Ssam struct secasvar *sav = NULL; 5872105197Ssam u_int16_t proto; 5873105197Ssam 5874120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5875120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5876120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5877120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5878105197Ssam 5879105197Ssam /* map satype to proto */ 5880105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5881120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5882120585Ssam __func__)); 5883105197Ssam return key_senderror(so, m, EINVAL); 5884105197Ssam } 5885105197Ssam 5886105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5887105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5888105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5889120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5890120585Ssam __func__)); 5891105197Ssam return key_senderror(so, m, EINVAL); 5892105197Ssam } 5893105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5894105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5895105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5896120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5897120585Ssam __func__)); 5898105197Ssam return key_senderror(so, m, EINVAL); 5899105197Ssam } 5900105197Ssam 5901105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5902105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5903105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5904105197Ssam 5905105197Ssam /* XXX boundary check against sa_len */ 5906105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5907105197Ssam 5908194062Svanhu /* 5909194062Svanhu * Make sure the port numbers are zero. 5910194062Svanhu * In case of NAT-T we will update them later if needed. 5911194062Svanhu */ 5912194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5913194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5914194062Svanhu 5915194062Svanhu#ifdef IPSEC_NAT_T 5916194062Svanhu /* 5917194062Svanhu * Handle NAT-T info if present. 5918194062Svanhu */ 5919194062Svanhu 5920194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5921194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5922194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5923194062Svanhu 5924194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5925194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5926194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5927194062Svanhu __func__)); 5928194062Svanhu return key_senderror(so, m, EINVAL); 5929194062Svanhu } 5930194062Svanhu 5931194062Svanhu sport = (struct sadb_x_nat_t_port *) 5932194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5933194062Svanhu dport = (struct sadb_x_nat_t_port *) 5934194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5935194062Svanhu 5936194062Svanhu if (sport) 5937194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5938194062Svanhu sport->sadb_x_nat_t_port_port); 5939194062Svanhu if (dport) 5940194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5941194062Svanhu dport->sadb_x_nat_t_port_port); 5942194062Svanhu } 5943194062Svanhu#endif 5944194062Svanhu 5945105197Ssam /* get a SA header */ 5946120585Ssam SAHTREE_LOCK(); 5947181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5948105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5949105197Ssam continue; 5950105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5951105197Ssam continue; 5952105197Ssam 5953105197Ssam /* get a SA with SPI. */ 5954105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5955105197Ssam if (sav) 5956105197Ssam break; 5957105197Ssam } 5958120585Ssam SAHTREE_UNLOCK(); 5959105197Ssam if (sah == NULL) { 5960120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5961105197Ssam return key_senderror(so, m, ENOENT); 5962105197Ssam } 5963105197Ssam 5964105197Ssam { 5965105197Ssam struct mbuf *n; 5966105197Ssam u_int8_t satype; 5967105197Ssam 5968105197Ssam /* map proto to satype */ 5969105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5970120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5971120585Ssam __func__)); 5972105197Ssam return key_senderror(so, m, EINVAL); 5973105197Ssam } 5974105197Ssam 5975105197Ssam /* create new sadb_msg to reply. */ 5976105197Ssam n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5977105197Ssam mhp->msg->sadb_msg_pid); 5978105197Ssam if (!n) 5979105197Ssam return key_senderror(so, m, ENOBUFS); 5980105197Ssam 5981105197Ssam m_freem(m); 5982105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5983105197Ssam } 5984105197Ssam} 5985105197Ssam 5986105197Ssam/* XXX make it sysctl-configurable? */ 5987105197Ssamstatic void 5988105197Ssamkey_getcomb_setlifetime(comb) 5989105197Ssam struct sadb_comb *comb; 5990105197Ssam{ 5991105197Ssam 5992105197Ssam comb->sadb_comb_soft_allocations = 1; 5993105197Ssam comb->sadb_comb_hard_allocations = 1; 5994105197Ssam comb->sadb_comb_soft_bytes = 0; 5995105197Ssam comb->sadb_comb_hard_bytes = 0; 5996105197Ssam comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5997105197Ssam comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5998105197Ssam comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5999105197Ssam comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 6000105197Ssam} 6001105197Ssam 6002105197Ssam/* 6003105197Ssam * XXX reorder combinations by preference 6004105197Ssam * XXX no idea if the user wants ESP authentication or not 6005105197Ssam */ 6006105197Ssamstatic struct mbuf * 6007105197Ssamkey_getcomb_esp() 6008105197Ssam{ 6009105197Ssam struct sadb_comb *comb; 6010105197Ssam struct enc_xform *algo; 6011105197Ssam struct mbuf *result = NULL, *m, *n; 6012105197Ssam int encmin; 6013105197Ssam int i, off, o; 6014105197Ssam int totlen; 6015105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6016105197Ssam 6017105197Ssam m = NULL; 6018105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6019105197Ssam algo = esp_algorithm_lookup(i); 6020105197Ssam if (algo == NULL) 6021105197Ssam continue; 6022105197Ssam 6023105197Ssam /* discard algorithms with key size smaller than system min */ 6024181803Sbz if (_BITS(algo->maxkey) < V_ipsec_esp_keymin) 6025105197Ssam continue; 6026181803Sbz if (_BITS(algo->minkey) < V_ipsec_esp_keymin) 6027181803Sbz encmin = V_ipsec_esp_keymin; 6028105197Ssam else 6029105197Ssam encmin = _BITS(algo->minkey); 6030105197Ssam 6031181803Sbz if (V_ipsec_esp_auth) 6032105197Ssam m = key_getcomb_ah(); 6033105197Ssam else { 6034120585Ssam IPSEC_ASSERT(l <= MLEN, 6035120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6036111119Simp MGET(m, M_DONTWAIT, MT_DATA); 6037105197Ssam if (m) { 6038105197Ssam M_ALIGN(m, l); 6039105197Ssam m->m_len = l; 6040105197Ssam m->m_next = NULL; 6041105197Ssam bzero(mtod(m, caddr_t), m->m_len); 6042105197Ssam } 6043105197Ssam } 6044105197Ssam if (!m) 6045105197Ssam goto fail; 6046105197Ssam 6047105197Ssam totlen = 0; 6048105197Ssam for (n = m; n; n = n->m_next) 6049105197Ssam totlen += n->m_len; 6050120585Ssam IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 6051105197Ssam 6052105197Ssam for (off = 0; off < totlen; off += l) { 6053105197Ssam n = m_pulldown(m, off, l, &o); 6054105197Ssam if (!n) { 6055105197Ssam /* m is already freed */ 6056105197Ssam goto fail; 6057105197Ssam } 6058105197Ssam comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 6059105197Ssam bzero(comb, sizeof(*comb)); 6060105197Ssam key_getcomb_setlifetime(comb); 6061105197Ssam comb->sadb_comb_encrypt = i; 6062105197Ssam comb->sadb_comb_encrypt_minbits = encmin; 6063105197Ssam comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6064105197Ssam } 6065105197Ssam 6066105197Ssam if (!result) 6067105197Ssam result = m; 6068105197Ssam else 6069105197Ssam m_cat(result, m); 6070105197Ssam } 6071105197Ssam 6072105197Ssam return result; 6073105197Ssam 6074105197Ssam fail: 6075105197Ssam if (result) 6076105197Ssam m_freem(result); 6077105197Ssam return NULL; 6078105197Ssam} 6079105197Ssam 6080105197Ssamstatic void 6081105197Ssamkey_getsizes_ah( 6082105197Ssam const struct auth_hash *ah, 6083105197Ssam int alg, 6084105197Ssam u_int16_t* min, 6085105197Ssam u_int16_t* max) 6086105197Ssam{ 6087183550Szec 6088105197Ssam *min = *max = ah->keysize; 6089105197Ssam if (ah->keysize == 0) { 6090105197Ssam /* 6091105197Ssam * Transform takes arbitrary key size but algorithm 6092105197Ssam * key size is restricted. Enforce this here. 6093105197Ssam */ 6094105197Ssam switch (alg) { 6095105197Ssam case SADB_X_AALG_MD5: *min = *max = 16; break; 6096105197Ssam case SADB_X_AALG_SHA: *min = *max = 20; break; 6097105197Ssam case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 6098105197Ssam default: 6099120585Ssam DPRINTF(("%s: unknown AH algorithm %u\n", 6100120585Ssam __func__, alg)); 6101105197Ssam break; 6102105197Ssam } 6103105197Ssam } 6104105197Ssam} 6105105197Ssam 6106105197Ssam/* 6107105197Ssam * XXX reorder combinations by preference 6108105197Ssam */ 6109105197Ssamstatic struct mbuf * 6110105197Ssamkey_getcomb_ah() 6111105197Ssam{ 6112105197Ssam struct sadb_comb *comb; 6113105197Ssam struct auth_hash *algo; 6114105197Ssam struct mbuf *m; 6115105197Ssam u_int16_t minkeysize, maxkeysize; 6116105197Ssam int i; 6117105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6118105197Ssam 6119105197Ssam m = NULL; 6120105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6121105197Ssam#if 1 6122105197Ssam /* we prefer HMAC algorithms, not old algorithms */ 6123105197Ssam if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 6124105197Ssam continue; 6125105197Ssam#endif 6126105197Ssam algo = ah_algorithm_lookup(i); 6127105197Ssam if (!algo) 6128105197Ssam continue; 6129105197Ssam key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6130105197Ssam /* discard algorithms with key size smaller than system min */ 6131181803Sbz if (_BITS(minkeysize) < V_ipsec_ah_keymin) 6132105197Ssam continue; 6133105197Ssam 6134105197Ssam if (!m) { 6135120585Ssam IPSEC_ASSERT(l <= MLEN, 6136120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6137111119Simp MGET(m, M_DONTWAIT, MT_DATA); 6138105197Ssam if (m) { 6139105197Ssam M_ALIGN(m, l); 6140105197Ssam m->m_len = l; 6141105197Ssam m->m_next = NULL; 6142105197Ssam } 6143105197Ssam } else 6144111119Simp M_PREPEND(m, l, M_DONTWAIT); 6145105197Ssam if (!m) 6146105197Ssam return NULL; 6147105197Ssam 6148105197Ssam comb = mtod(m, struct sadb_comb *); 6149105197Ssam bzero(comb, sizeof(*comb)); 6150105197Ssam key_getcomb_setlifetime(comb); 6151105197Ssam comb->sadb_comb_auth = i; 6152105197Ssam comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6153105197Ssam comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6154105197Ssam } 6155105197Ssam 6156105197Ssam return m; 6157105197Ssam} 6158105197Ssam 6159105197Ssam/* 6160105197Ssam * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 6161105197Ssam * XXX reorder combinations by preference 6162105197Ssam */ 6163105197Ssamstatic struct mbuf * 6164105197Ssamkey_getcomb_ipcomp() 6165105197Ssam{ 6166105197Ssam struct sadb_comb *comb; 6167105197Ssam struct comp_algo *algo; 6168105197Ssam struct mbuf *m; 6169105197Ssam int i; 6170105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6171105197Ssam 6172105197Ssam m = NULL; 6173105197Ssam for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6174105197Ssam algo = ipcomp_algorithm_lookup(i); 6175105197Ssam if (!algo) 6176105197Ssam continue; 6177105197Ssam 6178105197Ssam if (!m) { 6179120585Ssam IPSEC_ASSERT(l <= MLEN, 6180120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6181111119Simp MGET(m, M_DONTWAIT, MT_DATA); 6182105197Ssam if (m) { 6183105197Ssam M_ALIGN(m, l); 6184105197Ssam m->m_len = l; 6185105197Ssam m->m_next = NULL; 6186105197Ssam } 6187105197Ssam } else 6188111119Simp M_PREPEND(m, l, M_DONTWAIT); 6189105197Ssam if (!m) 6190105197Ssam return NULL; 6191105197Ssam 6192105197Ssam comb = mtod(m, struct sadb_comb *); 6193105197Ssam bzero(comb, sizeof(*comb)); 6194105197Ssam key_getcomb_setlifetime(comb); 6195105197Ssam comb->sadb_comb_encrypt = i; 6196105197Ssam /* what should we set into sadb_comb_*_{min,max}bits? */ 6197105197Ssam } 6198105197Ssam 6199105197Ssam return m; 6200105197Ssam} 6201105197Ssam 6202105197Ssam/* 6203105197Ssam * XXX no way to pass mode (transport/tunnel) to userland 6204105197Ssam * XXX replay checking? 6205105197Ssam * XXX sysctl interface to ipsec_{ah,esp}_keymin 6206105197Ssam */ 6207105197Ssamstatic struct mbuf * 6208105197Ssamkey_getprop(saidx) 6209105197Ssam const struct secasindex *saidx; 6210105197Ssam{ 6211105197Ssam struct sadb_prop *prop; 6212105197Ssam struct mbuf *m, *n; 6213105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6214105197Ssam int totlen; 6215105197Ssam 6216105197Ssam switch (saidx->proto) { 6217105197Ssam case IPPROTO_ESP: 6218105197Ssam m = key_getcomb_esp(); 6219105197Ssam break; 6220105197Ssam case IPPROTO_AH: 6221105197Ssam m = key_getcomb_ah(); 6222105197Ssam break; 6223105197Ssam case IPPROTO_IPCOMP: 6224105197Ssam m = key_getcomb_ipcomp(); 6225105197Ssam break; 6226105197Ssam default: 6227105197Ssam return NULL; 6228105197Ssam } 6229105197Ssam 6230105197Ssam if (!m) 6231105197Ssam return NULL; 6232111119Simp M_PREPEND(m, l, M_DONTWAIT); 6233105197Ssam if (!m) 6234105197Ssam return NULL; 6235105197Ssam 6236105197Ssam totlen = 0; 6237105197Ssam for (n = m; n; n = n->m_next) 6238105197Ssam totlen += n->m_len; 6239105197Ssam 6240105197Ssam prop = mtod(m, struct sadb_prop *); 6241105197Ssam bzero(prop, sizeof(*prop)); 6242105197Ssam prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6243105197Ssam prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6244105197Ssam prop->sadb_prop_replay = 32; /* XXX */ 6245105197Ssam 6246105197Ssam return m; 6247105197Ssam} 6248105197Ssam 6249105197Ssam/* 6250105197Ssam * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6251105197Ssam * send 6252105197Ssam * <base, SA, address(SD), (address(P)), x_policy, 6253105197Ssam * (identity(SD),) (sensitivity,) proposal> 6254105197Ssam * to KMD, and expect to receive 6255105197Ssam * <base> with SADB_ACQUIRE if error occured, 6256105197Ssam * or 6257105197Ssam * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6258105197Ssam * from KMD by PF_KEY. 6259105197Ssam * 6260105197Ssam * XXX x_policy is outside of RFC2367 (KAME extension). 6261105197Ssam * XXX sensitivity is not supported. 6262105197Ssam * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6263105197Ssam * see comment for key_getcomb_ipcomp(). 6264105197Ssam * 6265105197Ssam * OUT: 6266105197Ssam * 0 : succeed 6267105197Ssam * others: error number 6268105197Ssam */ 6269105197Ssamstatic int 6270105197Ssamkey_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6271105197Ssam{ 6272105197Ssam struct mbuf *result = NULL, *m; 6273105197Ssam struct secacq *newacq; 6274105197Ssam u_int8_t satype; 6275105197Ssam int error = -1; 6276105197Ssam u_int32_t seq; 6277105197Ssam 6278120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 6279105197Ssam satype = key_proto2satype(saidx->proto); 6280120585Ssam IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 6281105197Ssam 6282105197Ssam /* 6283105197Ssam * We never do anything about acquirng SA. There is anather 6284105197Ssam * solution that kernel blocks to send SADB_ACQUIRE message until 6285105197Ssam * getting something message from IKEd. In later case, to be 6286105197Ssam * managed with ACQUIRING list. 6287105197Ssam */ 6288108533Sschweikh /* Get an entry to check whether sending message or not. */ 6289105197Ssam if ((newacq = key_getacq(saidx)) != NULL) { 6290181803Sbz if (V_key_blockacq_count < newacq->count) { 6291105197Ssam /* reset counter and do send message. */ 6292105197Ssam newacq->count = 0; 6293105197Ssam } else { 6294105197Ssam /* increment counter and do nothing. */ 6295105197Ssam newacq->count++; 6296105197Ssam return 0; 6297105197Ssam } 6298105197Ssam } else { 6299105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 6300105197Ssam if ((newacq = key_newacq(saidx)) == NULL) 6301105197Ssam return ENOBUFS; 6302105197Ssam } 6303105197Ssam 6304105197Ssam 6305105197Ssam seq = newacq->seq; 6306105197Ssam m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6307105197Ssam if (!m) { 6308105197Ssam error = ENOBUFS; 6309105197Ssam goto fail; 6310105197Ssam } 6311105197Ssam result = m; 6312105197Ssam 6313194062Svanhu /* 6314194062Svanhu * No SADB_X_EXT_NAT_T_* here: we do not know 6315194062Svanhu * anything related to NAT-T at this time. 6316194062Svanhu */ 6317194062Svanhu 6318105197Ssam /* set sadb_address for saidx's. */ 6319105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6320105197Ssam &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6321105197Ssam if (!m) { 6322105197Ssam error = ENOBUFS; 6323105197Ssam goto fail; 6324105197Ssam } 6325105197Ssam m_cat(result, m); 6326105197Ssam 6327105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6328105197Ssam &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6329105197Ssam if (!m) { 6330105197Ssam error = ENOBUFS; 6331105197Ssam goto fail; 6332105197Ssam } 6333105197Ssam m_cat(result, m); 6334105197Ssam 6335105197Ssam /* XXX proxy address (optional) */ 6336105197Ssam 6337105197Ssam /* set sadb_x_policy */ 6338105197Ssam if (sp) { 6339105197Ssam m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6340105197Ssam if (!m) { 6341105197Ssam error = ENOBUFS; 6342105197Ssam goto fail; 6343105197Ssam } 6344105197Ssam m_cat(result, m); 6345105197Ssam } 6346105197Ssam 6347105197Ssam /* XXX identity (optional) */ 6348105197Ssam#if 0 6349105197Ssam if (idexttype && fqdn) { 6350105197Ssam /* create identity extension (FQDN) */ 6351105197Ssam struct sadb_ident *id; 6352105197Ssam int fqdnlen; 6353105197Ssam 6354105197Ssam fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6355105197Ssam id = (struct sadb_ident *)p; 6356105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6357105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6358105197Ssam id->sadb_ident_exttype = idexttype; 6359105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6360105197Ssam bcopy(fqdn, id + 1, fqdnlen); 6361105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6362105197Ssam } 6363105197Ssam 6364105197Ssam if (idexttype) { 6365105197Ssam /* create identity extension (USERFQDN) */ 6366105197Ssam struct sadb_ident *id; 6367105197Ssam int userfqdnlen; 6368105197Ssam 6369105197Ssam if (userfqdn) { 6370105197Ssam /* +1 for terminating-NUL */ 6371105197Ssam userfqdnlen = strlen(userfqdn) + 1; 6372105197Ssam } else 6373105197Ssam userfqdnlen = 0; 6374105197Ssam id = (struct sadb_ident *)p; 6375105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6376105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6377105197Ssam id->sadb_ident_exttype = idexttype; 6378105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6379105197Ssam /* XXX is it correct? */ 6380105197Ssam if (curproc && curproc->p_cred) 6381105197Ssam id->sadb_ident_id = curproc->p_cred->p_ruid; 6382105197Ssam if (userfqdn && userfqdnlen) 6383105197Ssam bcopy(userfqdn, id + 1, userfqdnlen); 6384105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6385105197Ssam } 6386105197Ssam#endif 6387105197Ssam 6388105197Ssam /* XXX sensitivity (optional) */ 6389105197Ssam 6390105197Ssam /* create proposal/combination extension */ 6391105197Ssam m = key_getprop(saidx); 6392105197Ssam#if 0 6393105197Ssam /* 6394105197Ssam * spec conformant: always attach proposal/combination extension, 6395105197Ssam * the problem is that we have no way to attach it for ipcomp, 6396105197Ssam * due to the way sadb_comb is declared in RFC2367. 6397105197Ssam */ 6398105197Ssam if (!m) { 6399105197Ssam error = ENOBUFS; 6400105197Ssam goto fail; 6401105197Ssam } 6402105197Ssam m_cat(result, m); 6403105197Ssam#else 6404105197Ssam /* 6405105197Ssam * outside of spec; make proposal/combination extension optional. 6406105197Ssam */ 6407105197Ssam if (m) 6408105197Ssam m_cat(result, m); 6409105197Ssam#endif 6410105197Ssam 6411105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 6412105197Ssam error = EINVAL; 6413105197Ssam goto fail; 6414105197Ssam } 6415105197Ssam 6416105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 6417105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 6418105197Ssam if (result == NULL) { 6419105197Ssam error = ENOBUFS; 6420105197Ssam goto fail; 6421105197Ssam } 6422105197Ssam } 6423105197Ssam 6424105197Ssam result->m_pkthdr.len = 0; 6425105197Ssam for (m = result; m; m = m->m_next) 6426105197Ssam result->m_pkthdr.len += m->m_len; 6427105197Ssam 6428105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 6429105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 6430105197Ssam 6431105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6432105197Ssam 6433105197Ssam fail: 6434105197Ssam if (result) 6435105197Ssam m_freem(result); 6436105197Ssam return error; 6437105197Ssam} 6438105197Ssam 6439105197Ssamstatic struct secacq * 6440105197Ssamkey_newacq(const struct secasindex *saidx) 6441105197Ssam{ 6442105197Ssam struct secacq *newacq; 6443105197Ssam 6444105197Ssam /* get new entry */ 6445119643Ssam newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6446105197Ssam if (newacq == NULL) { 6447120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6448105197Ssam return NULL; 6449105197Ssam } 6450105197Ssam 6451105197Ssam /* copy secindex */ 6452105197Ssam bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6453181803Sbz newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); 6454105197Ssam newacq->created = time_second; 6455105197Ssam newacq->count = 0; 6456105197Ssam 6457119643Ssam /* add to acqtree */ 6458120585Ssam ACQ_LOCK(); 6459181803Sbz LIST_INSERT_HEAD(&V_acqtree, newacq, chain); 6460120585Ssam ACQ_UNLOCK(); 6461119643Ssam 6462105197Ssam return newacq; 6463105197Ssam} 6464105197Ssam 6465105197Ssamstatic struct secacq * 6466105197Ssamkey_getacq(const struct secasindex *saidx) 6467105197Ssam{ 6468105197Ssam struct secacq *acq; 6469105197Ssam 6470120585Ssam ACQ_LOCK(); 6471181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 6472105197Ssam if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6473119643Ssam break; 6474105197Ssam } 6475120585Ssam ACQ_UNLOCK(); 6476105197Ssam 6477119643Ssam return acq; 6478105197Ssam} 6479105197Ssam 6480105197Ssamstatic struct secacq * 6481105197Ssamkey_getacqbyseq(seq) 6482105197Ssam u_int32_t seq; 6483105197Ssam{ 6484105197Ssam struct secacq *acq; 6485105197Ssam 6486120585Ssam ACQ_LOCK(); 6487181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 6488105197Ssam if (acq->seq == seq) 6489119643Ssam break; 6490105197Ssam } 6491120585Ssam ACQ_UNLOCK(); 6492105197Ssam 6493119643Ssam return acq; 6494105197Ssam} 6495105197Ssam 6496105197Ssamstatic struct secspacq * 6497105197Ssamkey_newspacq(spidx) 6498105197Ssam struct secpolicyindex *spidx; 6499105197Ssam{ 6500105197Ssam struct secspacq *acq; 6501105197Ssam 6502105197Ssam /* get new entry */ 6503119643Ssam acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6504105197Ssam if (acq == NULL) { 6505120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6506105197Ssam return NULL; 6507105197Ssam } 6508105197Ssam 6509105197Ssam /* copy secindex */ 6510105197Ssam bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6511105197Ssam acq->created = time_second; 6512105197Ssam acq->count = 0; 6513105197Ssam 6514119643Ssam /* add to spacqtree */ 6515120585Ssam SPACQ_LOCK(); 6516181803Sbz LIST_INSERT_HEAD(&V_spacqtree, acq, chain); 6517120585Ssam SPACQ_UNLOCK(); 6518119643Ssam 6519105197Ssam return acq; 6520105197Ssam} 6521105197Ssam 6522105197Ssamstatic struct secspacq * 6523105197Ssamkey_getspacq(spidx) 6524105197Ssam struct secpolicyindex *spidx; 6525105197Ssam{ 6526105197Ssam struct secspacq *acq; 6527105197Ssam 6528120585Ssam SPACQ_LOCK(); 6529181803Sbz LIST_FOREACH(acq, &V_spacqtree, chain) { 6530119643Ssam if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 6531119643Ssam /* NB: return holding spacq_lock */ 6532105197Ssam return acq; 6533119643Ssam } 6534105197Ssam } 6535120585Ssam SPACQ_UNLOCK(); 6536105197Ssam 6537105197Ssam return NULL; 6538105197Ssam} 6539105197Ssam 6540105197Ssam/* 6541105197Ssam * SADB_ACQUIRE processing, 6542105197Ssam * in first situation, is receiving 6543105197Ssam * <base> 6544105197Ssam * from the ikmpd, and clear sequence of its secasvar entry. 6545105197Ssam * 6546105197Ssam * In second situation, is receiving 6547105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6548105197Ssam * from a user land process, and return 6549105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6550105197Ssam * to the socket. 6551105197Ssam * 6552105197Ssam * m will always be freed. 6553105197Ssam */ 6554105197Ssamstatic int 6555105197Ssamkey_acquire2(so, m, mhp) 6556105197Ssam struct socket *so; 6557105197Ssam struct mbuf *m; 6558105197Ssam const struct sadb_msghdr *mhp; 6559105197Ssam{ 6560105197Ssam const struct sadb_address *src0, *dst0; 6561105197Ssam struct secasindex saidx; 6562105197Ssam struct secashead *sah; 6563105197Ssam u_int16_t proto; 6564105197Ssam int error; 6565105197Ssam 6566120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6567120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6568120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6569120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6570105197Ssam 6571105197Ssam /* 6572105197Ssam * Error message from KMd. 6573105197Ssam * We assume that if error was occured in IKEd, the length of PFKEY 6574105197Ssam * message is equal to the size of sadb_msg structure. 6575105197Ssam * We do not raise error even if error occured in this function. 6576105197Ssam */ 6577105197Ssam if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6578105197Ssam struct secacq *acq; 6579105197Ssam 6580105197Ssam /* check sequence number */ 6581105197Ssam if (mhp->msg->sadb_msg_seq == 0) { 6582120585Ssam ipseclog((LOG_DEBUG, "%s: must specify sequence " 6583120585Ssam "number.\n", __func__)); 6584105197Ssam m_freem(m); 6585105197Ssam return 0; 6586105197Ssam } 6587105197Ssam 6588105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6589105197Ssam /* 6590105197Ssam * the specified larval SA is already gone, or we got 6591105197Ssam * a bogus sequence number. we can silently ignore it. 6592105197Ssam */ 6593105197Ssam m_freem(m); 6594105197Ssam return 0; 6595105197Ssam } 6596105197Ssam 6597105197Ssam /* reset acq counter in order to deletion by timehander. */ 6598105197Ssam acq->created = time_second; 6599105197Ssam acq->count = 0; 6600105197Ssam m_freem(m); 6601105197Ssam return 0; 6602105197Ssam } 6603105197Ssam 6604105197Ssam /* 6605105197Ssam * This message is from user land. 6606105197Ssam */ 6607105197Ssam 6608105197Ssam /* map satype to proto */ 6609105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6610120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6611120585Ssam __func__)); 6612105197Ssam return key_senderror(so, m, EINVAL); 6613105197Ssam } 6614105197Ssam 6615105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6616105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6617105197Ssam mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6618105197Ssam /* error */ 6619120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6620120585Ssam __func__)); 6621105197Ssam return key_senderror(so, m, EINVAL); 6622105197Ssam } 6623105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6624105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6625105197Ssam mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6626105197Ssam /* error */ 6627120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6628120585Ssam __func__)); 6629105197Ssam return key_senderror(so, m, EINVAL); 6630105197Ssam } 6631105197Ssam 6632105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6633105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6634105197Ssam 6635105197Ssam /* XXX boundary check against sa_len */ 6636105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6637105197Ssam 6638194062Svanhu /* 6639194062Svanhu * Make sure the port numbers are zero. 6640194062Svanhu * In case of NAT-T we will update them later if needed. 6641194062Svanhu */ 6642194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 6643194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 6644194062Svanhu 6645194062Svanhu#ifndef IPSEC_NAT_T 6646194062Svanhu /* 6647194062Svanhu * Handle NAT-T info if present. 6648194062Svanhu */ 6649194062Svanhu 6650194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 6651194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 6652194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 6653194062Svanhu 6654194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 6655194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 6656194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 6657194062Svanhu __func__)); 6658194062Svanhu return key_senderror(so, m, EINVAL); 6659194062Svanhu } 6660194062Svanhu 6661194062Svanhu sport = (struct sadb_x_nat_t_port *) 6662194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 6663194062Svanhu dport = (struct sadb_x_nat_t_port *) 6664194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 6665194062Svanhu 6666194062Svanhu if (sport) 6667194062Svanhu KEY_PORTTOSADDR(&saidx.src, 6668194062Svanhu sport->sadb_x_nat_t_port_port); 6669194062Svanhu if (dport) 6670194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 6671194062Svanhu dport->sadb_x_nat_t_port_port); 6672194062Svanhu } 6673194062Svanhu#endif 6674194062Svanhu 6675105197Ssam /* get a SA index */ 6676120585Ssam SAHTREE_LOCK(); 6677181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6678105197Ssam if (sah->state == SADB_SASTATE_DEAD) 6679105197Ssam continue; 6680105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6681105197Ssam break; 6682105197Ssam } 6683120585Ssam SAHTREE_UNLOCK(); 6684105197Ssam if (sah != NULL) { 6685120585Ssam ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 6686105197Ssam return key_senderror(so, m, EEXIST); 6687105197Ssam } 6688105197Ssam 6689105197Ssam error = key_acquire(&saidx, NULL); 6690105197Ssam if (error != 0) { 6691120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 6692120585Ssam __func__, mhp->msg->sadb_msg_errno)); 6693105197Ssam return key_senderror(so, m, error); 6694105197Ssam } 6695105197Ssam 6696105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6697105197Ssam} 6698105197Ssam 6699105197Ssam/* 6700105197Ssam * SADB_REGISTER processing. 6701105197Ssam * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6702105197Ssam * receive 6703105197Ssam * <base> 6704105197Ssam * from the ikmpd, and register a socket to send PF_KEY messages, 6705105197Ssam * and send 6706105197Ssam * <base, supported> 6707105197Ssam * to KMD by PF_KEY. 6708105197Ssam * If socket is detached, must free from regnode. 6709105197Ssam * 6710105197Ssam * m will always be freed. 6711105197Ssam */ 6712105197Ssamstatic int 6713105197Ssamkey_register(so, m, mhp) 6714105197Ssam struct socket *so; 6715105197Ssam struct mbuf *m; 6716105197Ssam const struct sadb_msghdr *mhp; 6717105197Ssam{ 6718105197Ssam struct secreg *reg, *newreg = 0; 6719105197Ssam 6720120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6721120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6722120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6723120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6724105197Ssam 6725105197Ssam /* check for invalid register message */ 6726181803Sbz if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0])) 6727105197Ssam return key_senderror(so, m, EINVAL); 6728105197Ssam 6729105197Ssam /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6730105197Ssam if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6731105197Ssam goto setmsg; 6732105197Ssam 6733105197Ssam /* check whether existing or not */ 6734120585Ssam REGTREE_LOCK(); 6735181803Sbz LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) { 6736105197Ssam if (reg->so == so) { 6737120585Ssam REGTREE_UNLOCK(); 6738120585Ssam ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6739120585Ssam __func__)); 6740105197Ssam return key_senderror(so, m, EEXIST); 6741105197Ssam } 6742105197Ssam } 6743105197Ssam 6744105197Ssam /* create regnode */ 6745119643Ssam newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6746105197Ssam if (newreg == NULL) { 6747120585Ssam REGTREE_UNLOCK(); 6748120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6749105197Ssam return key_senderror(so, m, ENOBUFS); 6750105197Ssam } 6751105197Ssam 6752105197Ssam newreg->so = so; 6753105197Ssam ((struct keycb *)sotorawcb(so))->kp_registered++; 6754105197Ssam 6755105197Ssam /* add regnode to regtree. */ 6756181803Sbz LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain); 6757120585Ssam REGTREE_UNLOCK(); 6758105197Ssam 6759105197Ssam setmsg: 6760105197Ssam { 6761105197Ssam struct mbuf *n; 6762105197Ssam struct sadb_msg *newmsg; 6763105197Ssam struct sadb_supported *sup; 6764105197Ssam u_int len, alen, elen; 6765105197Ssam int off; 6766105197Ssam int i; 6767105197Ssam struct sadb_alg *alg; 6768105197Ssam 6769105197Ssam /* create new sadb_msg to reply. */ 6770105197Ssam alen = 0; 6771105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6772105197Ssam if (ah_algorithm_lookup(i)) 6773105197Ssam alen += sizeof(struct sadb_alg); 6774105197Ssam } 6775105197Ssam if (alen) 6776105197Ssam alen += sizeof(struct sadb_supported); 6777105197Ssam elen = 0; 6778105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6779105197Ssam if (esp_algorithm_lookup(i)) 6780105197Ssam elen += sizeof(struct sadb_alg); 6781105197Ssam } 6782105197Ssam if (elen) 6783105197Ssam elen += sizeof(struct sadb_supported); 6784105197Ssam 6785105197Ssam len = sizeof(struct sadb_msg) + alen + elen; 6786105197Ssam 6787105197Ssam if (len > MCLBYTES) 6788105197Ssam return key_senderror(so, m, ENOBUFS); 6789105197Ssam 6790111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6791105197Ssam if (len > MHLEN) { 6792111119Simp MCLGET(n, M_DONTWAIT); 6793105197Ssam if ((n->m_flags & M_EXT) == 0) { 6794105197Ssam m_freem(n); 6795105197Ssam n = NULL; 6796105197Ssam } 6797105197Ssam } 6798105197Ssam if (!n) 6799105197Ssam return key_senderror(so, m, ENOBUFS); 6800105197Ssam 6801105197Ssam n->m_pkthdr.len = n->m_len = len; 6802105197Ssam n->m_next = NULL; 6803105197Ssam off = 0; 6804105197Ssam 6805105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6806105197Ssam newmsg = mtod(n, struct sadb_msg *); 6807105197Ssam newmsg->sadb_msg_errno = 0; 6808105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6809105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6810105197Ssam 6811105197Ssam /* for authentication algorithm */ 6812105197Ssam if (alen) { 6813105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6814105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(alen); 6815105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6816105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6817105197Ssam 6818105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6819105197Ssam struct auth_hash *aalgo; 6820105197Ssam u_int16_t minkeysize, maxkeysize; 6821105197Ssam 6822105197Ssam aalgo = ah_algorithm_lookup(i); 6823105197Ssam if (!aalgo) 6824105197Ssam continue; 6825105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6826105197Ssam alg->sadb_alg_id = i; 6827105197Ssam alg->sadb_alg_ivlen = 0; 6828105197Ssam key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6829105197Ssam alg->sadb_alg_minbits = _BITS(minkeysize); 6830105197Ssam alg->sadb_alg_maxbits = _BITS(maxkeysize); 6831105197Ssam off += PFKEY_ALIGN8(sizeof(*alg)); 6832105197Ssam } 6833105197Ssam } 6834105197Ssam 6835105197Ssam /* for encryption algorithm */ 6836105197Ssam if (elen) { 6837105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6838105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(elen); 6839105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6840105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6841105197Ssam 6842105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6843105197Ssam struct enc_xform *ealgo; 6844105197Ssam 6845105197Ssam ealgo = esp_algorithm_lookup(i); 6846105197Ssam if (!ealgo) 6847105197Ssam continue; 6848105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6849105197Ssam alg->sadb_alg_id = i; 6850105197Ssam alg->sadb_alg_ivlen = ealgo->blocksize; 6851105197Ssam alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6852105197Ssam alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6853105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6854105197Ssam } 6855105197Ssam } 6856105197Ssam 6857120585Ssam IPSEC_ASSERT(off == len, 6858120585Ssam ("length assumption failed (off %u len %u)", off, len)); 6859105197Ssam 6860105197Ssam m_freem(m); 6861105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6862105197Ssam } 6863105197Ssam} 6864105197Ssam 6865105197Ssam/* 6866105197Ssam * free secreg entry registered. 6867105197Ssam * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6868105197Ssam */ 6869105197Ssamvoid 6870119643Ssamkey_freereg(struct socket *so) 6871105197Ssam{ 6872105197Ssam struct secreg *reg; 6873105197Ssam int i; 6874105197Ssam 6875120585Ssam IPSEC_ASSERT(so != NULL, ("NULL so")); 6876105197Ssam 6877105197Ssam /* 6878105197Ssam * check whether existing or not. 6879105197Ssam * check all type of SA, because there is a potential that 6880105197Ssam * one socket is registered to multiple type of SA. 6881105197Ssam */ 6882120585Ssam REGTREE_LOCK(); 6883105197Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6884181803Sbz LIST_FOREACH(reg, &V_regtree[i], chain) { 6885119643Ssam if (reg->so == so && __LIST_CHAINED(reg)) { 6886105197Ssam LIST_REMOVE(reg, chain); 6887119643Ssam free(reg, M_IPSEC_SAR); 6888105197Ssam break; 6889105197Ssam } 6890105197Ssam } 6891105197Ssam } 6892120585Ssam REGTREE_UNLOCK(); 6893105197Ssam} 6894105197Ssam 6895105197Ssam/* 6896105197Ssam * SADB_EXPIRE processing 6897105197Ssam * send 6898105197Ssam * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6899105197Ssam * to KMD by PF_KEY. 6900105197Ssam * NOTE: We send only soft lifetime extension. 6901105197Ssam * 6902105197Ssam * OUT: 0 : succeed 6903105197Ssam * others : error number 6904105197Ssam */ 6905105197Ssamstatic int 6906119643Ssamkey_expire(struct secasvar *sav) 6907105197Ssam{ 6908105197Ssam int s; 6909105197Ssam int satype; 6910105197Ssam struct mbuf *result = NULL, *m; 6911105197Ssam int len; 6912105197Ssam int error = -1; 6913105197Ssam struct sadb_lifetime *lt; 6914105197Ssam 6915105197Ssam /* XXX: Why do we lock ? */ 6916105197Ssam s = splnet(); /*called from softclock()*/ 6917105197Ssam 6918120585Ssam IPSEC_ASSERT (sav != NULL, ("null sav")); 6919120585Ssam IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6920105197Ssam 6921105197Ssam /* set msg header */ 6922120585Ssam satype = key_proto2satype(sav->sah->saidx.proto); 6923120585Ssam IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6924105197Ssam m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6925105197Ssam if (!m) { 6926105197Ssam error = ENOBUFS; 6927105197Ssam goto fail; 6928105197Ssam } 6929105197Ssam result = m; 6930105197Ssam 6931105197Ssam /* create SA extension */ 6932105197Ssam m = key_setsadbsa(sav); 6933105197Ssam if (!m) { 6934105197Ssam error = ENOBUFS; 6935105197Ssam goto fail; 6936105197Ssam } 6937105197Ssam m_cat(result, m); 6938105197Ssam 6939105197Ssam /* create SA extension */ 6940105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 6941105197Ssam sav->replay ? sav->replay->count : 0, 6942105197Ssam sav->sah->saidx.reqid); 6943105197Ssam if (!m) { 6944105197Ssam error = ENOBUFS; 6945105197Ssam goto fail; 6946105197Ssam } 6947105197Ssam m_cat(result, m); 6948105197Ssam 6949105197Ssam /* create lifetime extension (current and soft) */ 6950105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6951105197Ssam m = key_alloc_mbuf(len); 6952105197Ssam if (!m || m->m_next) { /*XXX*/ 6953105197Ssam if (m) 6954105197Ssam m_freem(m); 6955105197Ssam error = ENOBUFS; 6956105197Ssam goto fail; 6957105197Ssam } 6958105197Ssam bzero(mtod(m, caddr_t), len); 6959105197Ssam lt = mtod(m, struct sadb_lifetime *); 6960105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6961105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6962157123Sgnn lt->sadb_lifetime_allocations = sav->lft_c->allocations; 6963157123Sgnn lt->sadb_lifetime_bytes = sav->lft_c->bytes; 6964157123Sgnn lt->sadb_lifetime_addtime = sav->lft_c->addtime; 6965157123Sgnn lt->sadb_lifetime_usetime = sav->lft_c->usetime; 6966105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6967176743Sbz lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6968176743Sbz lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 6969176743Sbz lt->sadb_lifetime_allocations = sav->lft_s->allocations; 6970176743Sbz lt->sadb_lifetime_bytes = sav->lft_s->bytes; 6971176743Sbz lt->sadb_lifetime_addtime = sav->lft_s->addtime; 6972176743Sbz lt->sadb_lifetime_usetime = sav->lft_s->usetime; 6973105197Ssam m_cat(result, m); 6974105197Ssam 6975105197Ssam /* set sadb_address for source */ 6976105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6977105197Ssam &sav->sah->saidx.src.sa, 6978105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6979105197Ssam if (!m) { 6980105197Ssam error = ENOBUFS; 6981105197Ssam goto fail; 6982105197Ssam } 6983105197Ssam m_cat(result, m); 6984105197Ssam 6985105197Ssam /* set sadb_address for destination */ 6986105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6987105197Ssam &sav->sah->saidx.dst.sa, 6988105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6989105197Ssam if (!m) { 6990105197Ssam error = ENOBUFS; 6991105197Ssam goto fail; 6992105197Ssam } 6993105197Ssam m_cat(result, m); 6994105197Ssam 6995194062Svanhu /* 6996194062Svanhu * XXX-BZ Handle NAT-T extensions here. 6997194062Svanhu */ 6998194062Svanhu 6999105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 7000105197Ssam error = EINVAL; 7001105197Ssam goto fail; 7002105197Ssam } 7003105197Ssam 7004105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 7005105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 7006105197Ssam if (result == NULL) { 7007105197Ssam error = ENOBUFS; 7008105197Ssam goto fail; 7009105197Ssam } 7010105197Ssam } 7011105197Ssam 7012105197Ssam result->m_pkthdr.len = 0; 7013105197Ssam for (m = result; m; m = m->m_next) 7014105197Ssam result->m_pkthdr.len += m->m_len; 7015105197Ssam 7016105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 7017105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 7018105197Ssam 7019105197Ssam splx(s); 7020105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7021105197Ssam 7022105197Ssam fail: 7023105197Ssam if (result) 7024105197Ssam m_freem(result); 7025105197Ssam splx(s); 7026105197Ssam return error; 7027105197Ssam} 7028105197Ssam 7029105197Ssam/* 7030105197Ssam * SADB_FLUSH processing 7031105197Ssam * receive 7032105197Ssam * <base> 7033105197Ssam * from the ikmpd, and free all entries in secastree. 7034105197Ssam * and send, 7035105197Ssam * <base> 7036105197Ssam * to the ikmpd. 7037105197Ssam * NOTE: to do is only marking SADB_SASTATE_DEAD. 7038105197Ssam * 7039105197Ssam * m will always be freed. 7040105197Ssam */ 7041105197Ssamstatic int 7042105197Ssamkey_flush(so, m, mhp) 7043105197Ssam struct socket *so; 7044105197Ssam struct mbuf *m; 7045105197Ssam const struct sadb_msghdr *mhp; 7046105197Ssam{ 7047105197Ssam struct sadb_msg *newmsg; 7048105197Ssam struct secashead *sah, *nextsah; 7049105197Ssam struct secasvar *sav, *nextsav; 7050105197Ssam u_int16_t proto; 7051105197Ssam u_int8_t state; 7052105197Ssam u_int stateidx; 7053105197Ssam 7054120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7055120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7056120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7057105197Ssam 7058105197Ssam /* map satype to proto */ 7059105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7060120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7061120585Ssam __func__)); 7062105197Ssam return key_senderror(so, m, EINVAL); 7063105197Ssam } 7064105197Ssam 7065105197Ssam /* no SATYPE specified, i.e. flushing all SA. */ 7066120585Ssam SAHTREE_LOCK(); 7067181803Sbz for (sah = LIST_FIRST(&V_sahtree); 7068105197Ssam sah != NULL; 7069105197Ssam sah = nextsah) { 7070105197Ssam nextsah = LIST_NEXT(sah, chain); 7071105197Ssam 7072105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7073105197Ssam && proto != sah->saidx.proto) 7074105197Ssam continue; 7075105197Ssam 7076105197Ssam for (stateidx = 0; 7077185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 7078105197Ssam stateidx++) { 7079185348Szec state = saorder_state_any[stateidx]; 7080105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 7081105197Ssam sav != NULL; 7082105197Ssam sav = nextsav) { 7083105197Ssam 7084105197Ssam nextsav = LIST_NEXT(sav, chain); 7085105197Ssam 7086105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7087105197Ssam KEY_FREESAV(&sav); 7088105197Ssam } 7089105197Ssam } 7090105197Ssam 7091105197Ssam sah->state = SADB_SASTATE_DEAD; 7092105197Ssam } 7093120585Ssam SAHTREE_UNLOCK(); 7094105197Ssam 7095105197Ssam if (m->m_len < sizeof(struct sadb_msg) || 7096105197Ssam sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7097120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 7098105197Ssam return key_senderror(so, m, ENOBUFS); 7099105197Ssam } 7100105197Ssam 7101105197Ssam if (m->m_next) 7102105197Ssam m_freem(m->m_next); 7103105197Ssam m->m_next = NULL; 7104105197Ssam m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7105105197Ssam newmsg = mtod(m, struct sadb_msg *); 7106105197Ssam newmsg->sadb_msg_errno = 0; 7107105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7108105197Ssam 7109105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7110105197Ssam} 7111105197Ssam 7112105197Ssam/* 7113105197Ssam * SADB_DUMP processing 7114105197Ssam * dump all entries including status of DEAD in SAD. 7115105197Ssam * receive 7116105197Ssam * <base> 7117105197Ssam * from the ikmpd, and dump all secasvar leaves 7118105197Ssam * and send, 7119105197Ssam * <base> ..... 7120105197Ssam * to the ikmpd. 7121105197Ssam * 7122105197Ssam * m will always be freed. 7123105197Ssam */ 7124105197Ssamstatic int 7125105197Ssamkey_dump(so, m, mhp) 7126105197Ssam struct socket *so; 7127105197Ssam struct mbuf *m; 7128105197Ssam const struct sadb_msghdr *mhp; 7129105197Ssam{ 7130105197Ssam struct secashead *sah; 7131105197Ssam struct secasvar *sav; 7132105197Ssam u_int16_t proto; 7133105197Ssam u_int stateidx; 7134105197Ssam u_int8_t satype; 7135105197Ssam u_int8_t state; 7136105197Ssam int cnt; 7137105197Ssam struct sadb_msg *newmsg; 7138105197Ssam struct mbuf *n; 7139105197Ssam 7140120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7141120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7142120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7143120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7144105197Ssam 7145105197Ssam /* map satype to proto */ 7146105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7147120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7148120585Ssam __func__)); 7149105197Ssam return key_senderror(so, m, EINVAL); 7150105197Ssam } 7151105197Ssam 7152105197Ssam /* count sav entries to be sent to the userland. */ 7153105197Ssam cnt = 0; 7154120585Ssam SAHTREE_LOCK(); 7155181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7156105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7157105197Ssam && proto != sah->saidx.proto) 7158105197Ssam continue; 7159105197Ssam 7160105197Ssam for (stateidx = 0; 7161185348Szec stateidx < _ARRAYLEN(saorder_state_any); 7162105197Ssam stateidx++) { 7163185348Szec state = saorder_state_any[stateidx]; 7164105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 7165105197Ssam cnt++; 7166105197Ssam } 7167105197Ssam } 7168105197Ssam } 7169105197Ssam 7170119643Ssam if (cnt == 0) { 7171120585Ssam SAHTREE_UNLOCK(); 7172105197Ssam return key_senderror(so, m, ENOENT); 7173119643Ssam } 7174105197Ssam 7175105197Ssam /* send this to the userland, one at a time. */ 7176105197Ssam newmsg = NULL; 7177181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7178105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7179105197Ssam && proto != sah->saidx.proto) 7180105197Ssam continue; 7181105197Ssam 7182105197Ssam /* map proto to satype */ 7183105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7184120585Ssam SAHTREE_UNLOCK(); 7185120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 7186120585Ssam "SAD.\n", __func__)); 7187105197Ssam return key_senderror(so, m, EINVAL); 7188105197Ssam } 7189105197Ssam 7190105197Ssam for (stateidx = 0; 7191185348Szec stateidx < _ARRAYLEN(saorder_state_any); 7192105197Ssam stateidx++) { 7193185348Szec state = saorder_state_any[stateidx]; 7194105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 7195105197Ssam n = key_setdumpsa(sav, SADB_DUMP, satype, 7196105197Ssam --cnt, mhp->msg->sadb_msg_pid); 7197119643Ssam if (!n) { 7198120585Ssam SAHTREE_UNLOCK(); 7199105197Ssam return key_senderror(so, m, ENOBUFS); 7200119643Ssam } 7201105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 7202105197Ssam } 7203105197Ssam } 7204105197Ssam } 7205120585Ssam SAHTREE_UNLOCK(); 7206105197Ssam 7207105197Ssam m_freem(m); 7208105197Ssam return 0; 7209105197Ssam} 7210105197Ssam 7211105197Ssam/* 7212105197Ssam * SADB_X_PROMISC processing 7213105197Ssam * 7214105197Ssam * m will always be freed. 7215105197Ssam */ 7216105197Ssamstatic int 7217105197Ssamkey_promisc(so, m, mhp) 7218105197Ssam struct socket *so; 7219105197Ssam struct mbuf *m; 7220105197Ssam const struct sadb_msghdr *mhp; 7221105197Ssam{ 7222105197Ssam int olen; 7223105197Ssam 7224120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7225120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7226120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7227120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7228105197Ssam 7229105197Ssam olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7230105197Ssam 7231105197Ssam if (olen < sizeof(struct sadb_msg)) { 7232105197Ssam#if 1 7233105197Ssam return key_senderror(so, m, EINVAL); 7234105197Ssam#else 7235105197Ssam m_freem(m); 7236105197Ssam return 0; 7237105197Ssam#endif 7238105197Ssam } else if (olen == sizeof(struct sadb_msg)) { 7239105197Ssam /* enable/disable promisc mode */ 7240105197Ssam struct keycb *kp; 7241105197Ssam 7242105197Ssam if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7243105197Ssam return key_senderror(so, m, EINVAL); 7244105197Ssam mhp->msg->sadb_msg_errno = 0; 7245105197Ssam switch (mhp->msg->sadb_msg_satype) { 7246105197Ssam case 0: 7247105197Ssam case 1: 7248105197Ssam kp->kp_promisc = mhp->msg->sadb_msg_satype; 7249105197Ssam break; 7250105197Ssam default: 7251105197Ssam return key_senderror(so, m, EINVAL); 7252105197Ssam } 7253105197Ssam 7254105197Ssam /* send the original message back to everyone */ 7255105197Ssam mhp->msg->sadb_msg_errno = 0; 7256105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7257105197Ssam } else { 7258105197Ssam /* send packet as is */ 7259105197Ssam 7260105197Ssam m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7261105197Ssam 7262105197Ssam /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7263105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7264105197Ssam } 7265105197Ssam} 7266105197Ssam 7267105197Ssamstatic int (*key_typesw[]) __P((struct socket *, struct mbuf *, 7268105197Ssam const struct sadb_msghdr *)) = { 7269105197Ssam NULL, /* SADB_RESERVED */ 7270105197Ssam key_getspi, /* SADB_GETSPI */ 7271105197Ssam key_update, /* SADB_UPDATE */ 7272105197Ssam key_add, /* SADB_ADD */ 7273105197Ssam key_delete, /* SADB_DELETE */ 7274105197Ssam key_get, /* SADB_GET */ 7275105197Ssam key_acquire2, /* SADB_ACQUIRE */ 7276105197Ssam key_register, /* SADB_REGISTER */ 7277105197Ssam NULL, /* SADB_EXPIRE */ 7278105197Ssam key_flush, /* SADB_FLUSH */ 7279105197Ssam key_dump, /* SADB_DUMP */ 7280105197Ssam key_promisc, /* SADB_X_PROMISC */ 7281105197Ssam NULL, /* SADB_X_PCHANGE */ 7282105197Ssam key_spdadd, /* SADB_X_SPDUPDATE */ 7283105197Ssam key_spdadd, /* SADB_X_SPDADD */ 7284105197Ssam key_spddelete, /* SADB_X_SPDDELETE */ 7285105197Ssam key_spdget, /* SADB_X_SPDGET */ 7286105197Ssam NULL, /* SADB_X_SPDACQUIRE */ 7287105197Ssam key_spddump, /* SADB_X_SPDDUMP */ 7288105197Ssam key_spdflush, /* SADB_X_SPDFLUSH */ 7289105197Ssam key_spdadd, /* SADB_X_SPDSETIDX */ 7290105197Ssam NULL, /* SADB_X_SPDEXPIRE */ 7291105197Ssam key_spddelete2, /* SADB_X_SPDDELETE2 */ 7292105197Ssam}; 7293105197Ssam 7294105197Ssam/* 7295105197Ssam * parse sadb_msg buffer to process PFKEYv2, 7296105197Ssam * and create a data to response if needed. 7297105197Ssam * I think to be dealed with mbuf directly. 7298105197Ssam * IN: 7299105197Ssam * msgp : pointer to pointer to a received buffer pulluped. 7300105197Ssam * This is rewrited to response. 7301105197Ssam * so : pointer to socket. 7302105197Ssam * OUT: 7303105197Ssam * length for buffer to send to user process. 7304105197Ssam */ 7305105197Ssamint 7306105197Ssamkey_parse(m, so) 7307105197Ssam struct mbuf *m; 7308105197Ssam struct socket *so; 7309105197Ssam{ 7310105197Ssam struct sadb_msg *msg; 7311105197Ssam struct sadb_msghdr mh; 7312105197Ssam u_int orglen; 7313105197Ssam int error; 7314105197Ssam int target; 7315105197Ssam 7316120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7317120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7318105197Ssam 7319105197Ssam#if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7320105197Ssam KEYDEBUG(KEYDEBUG_KEY_DUMP, 7321120585Ssam ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 7322105197Ssam kdebug_sadb(msg)); 7323105197Ssam#endif 7324105197Ssam 7325105197Ssam if (m->m_len < sizeof(struct sadb_msg)) { 7326105197Ssam m = m_pullup(m, sizeof(struct sadb_msg)); 7327105197Ssam if (!m) 7328105197Ssam return ENOBUFS; 7329105197Ssam } 7330105197Ssam msg = mtod(m, struct sadb_msg *); 7331105197Ssam orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7332105197Ssam target = KEY_SENDUP_ONE; 7333105197Ssam 7334105197Ssam if ((m->m_flags & M_PKTHDR) == 0 || 7335105197Ssam m->m_pkthdr.len != m->m_pkthdr.len) { 7336120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 7337181803Sbz V_pfkeystat.out_invlen++; 7338105197Ssam error = EINVAL; 7339105197Ssam goto senderror; 7340105197Ssam } 7341105197Ssam 7342105197Ssam if (msg->sadb_msg_version != PF_KEY_V2) { 7343120585Ssam ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 7344120585Ssam __func__, msg->sadb_msg_version)); 7345181803Sbz V_pfkeystat.out_invver++; 7346105197Ssam error = EINVAL; 7347105197Ssam goto senderror; 7348105197Ssam } 7349105197Ssam 7350105197Ssam if (msg->sadb_msg_type > SADB_MAX) { 7351120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7352120585Ssam __func__, msg->sadb_msg_type)); 7353181803Sbz V_pfkeystat.out_invmsgtype++; 7354105197Ssam error = EINVAL; 7355105197Ssam goto senderror; 7356105197Ssam } 7357105197Ssam 7358105197Ssam /* for old-fashioned code - should be nuked */ 7359105197Ssam if (m->m_pkthdr.len > MCLBYTES) { 7360105197Ssam m_freem(m); 7361105197Ssam return ENOBUFS; 7362105197Ssam } 7363105197Ssam if (m->m_next) { 7364105197Ssam struct mbuf *n; 7365105197Ssam 7366111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 7367105197Ssam if (n && m->m_pkthdr.len > MHLEN) { 7368111119Simp MCLGET(n, M_DONTWAIT); 7369105197Ssam if ((n->m_flags & M_EXT) == 0) { 7370105197Ssam m_free(n); 7371105197Ssam n = NULL; 7372105197Ssam } 7373105197Ssam } 7374105197Ssam if (!n) { 7375105197Ssam m_freem(m); 7376105197Ssam return ENOBUFS; 7377105197Ssam } 7378105197Ssam m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 7379105197Ssam n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7380105197Ssam n->m_next = NULL; 7381105197Ssam m_freem(m); 7382105197Ssam m = n; 7383105197Ssam } 7384105197Ssam 7385105197Ssam /* align the mbuf chain so that extensions are in contiguous region. */ 7386105197Ssam error = key_align(m, &mh); 7387105197Ssam if (error) 7388105197Ssam return error; 7389105197Ssam 7390105197Ssam msg = mh.msg; 7391105197Ssam 7392105197Ssam /* check SA type */ 7393105197Ssam switch (msg->sadb_msg_satype) { 7394105197Ssam case SADB_SATYPE_UNSPEC: 7395105197Ssam switch (msg->sadb_msg_type) { 7396105197Ssam case SADB_GETSPI: 7397105197Ssam case SADB_UPDATE: 7398105197Ssam case SADB_ADD: 7399105197Ssam case SADB_DELETE: 7400105197Ssam case SADB_GET: 7401105197Ssam case SADB_ACQUIRE: 7402105197Ssam case SADB_EXPIRE: 7403120585Ssam ipseclog((LOG_DEBUG, "%s: must specify satype " 7404120585Ssam "when msg type=%u.\n", __func__, 7405120585Ssam msg->sadb_msg_type)); 7406181803Sbz V_pfkeystat.out_invsatype++; 7407105197Ssam error = EINVAL; 7408105197Ssam goto senderror; 7409105197Ssam } 7410105197Ssam break; 7411105197Ssam case SADB_SATYPE_AH: 7412105197Ssam case SADB_SATYPE_ESP: 7413105197Ssam case SADB_X_SATYPE_IPCOMP: 7414125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 7415105197Ssam switch (msg->sadb_msg_type) { 7416105197Ssam case SADB_X_SPDADD: 7417105197Ssam case SADB_X_SPDDELETE: 7418105197Ssam case SADB_X_SPDGET: 7419105197Ssam case SADB_X_SPDDUMP: 7420105197Ssam case SADB_X_SPDFLUSH: 7421105197Ssam case SADB_X_SPDSETIDX: 7422105197Ssam case SADB_X_SPDUPDATE: 7423105197Ssam case SADB_X_SPDDELETE2: 7424120585Ssam ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 7425120585Ssam __func__, msg->sadb_msg_type)); 7426181803Sbz V_pfkeystat.out_invsatype++; 7427105197Ssam error = EINVAL; 7428105197Ssam goto senderror; 7429105197Ssam } 7430105197Ssam break; 7431105197Ssam case SADB_SATYPE_RSVP: 7432105197Ssam case SADB_SATYPE_OSPFV2: 7433105197Ssam case SADB_SATYPE_RIPV2: 7434105197Ssam case SADB_SATYPE_MIP: 7435120585Ssam ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 7436120585Ssam __func__, msg->sadb_msg_satype)); 7437181803Sbz V_pfkeystat.out_invsatype++; 7438105197Ssam error = EOPNOTSUPP; 7439105197Ssam goto senderror; 7440105197Ssam case 1: /* XXX: What does it do? */ 7441105197Ssam if (msg->sadb_msg_type == SADB_X_PROMISC) 7442105197Ssam break; 7443105197Ssam /*FALLTHROUGH*/ 7444105197Ssam default: 7445120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7446120585Ssam __func__, msg->sadb_msg_satype)); 7447181803Sbz V_pfkeystat.out_invsatype++; 7448105197Ssam error = EINVAL; 7449105197Ssam goto senderror; 7450105197Ssam } 7451105197Ssam 7452105197Ssam /* check field of upper layer protocol and address family */ 7453105197Ssam if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7454105197Ssam && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7455105197Ssam struct sadb_address *src0, *dst0; 7456105197Ssam u_int plen; 7457105197Ssam 7458105197Ssam src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7459105197Ssam dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7460105197Ssam 7461105197Ssam /* check upper layer protocol */ 7462105197Ssam if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7463120585Ssam ipseclog((LOG_DEBUG, "%s: upper layer protocol " 7464120585Ssam "mismatched.\n", __func__)); 7465181803Sbz V_pfkeystat.out_invaddr++; 7466105197Ssam error = EINVAL; 7467105197Ssam goto senderror; 7468105197Ssam } 7469105197Ssam 7470105197Ssam /* check family */ 7471105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_family != 7472105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_family) { 7473120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 7474120585Ssam __func__)); 7475181803Sbz V_pfkeystat.out_invaddr++; 7476105197Ssam error = EINVAL; 7477105197Ssam goto senderror; 7478105197Ssam } 7479105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 7480105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_len) { 7481120585Ssam ipseclog((LOG_DEBUG, "%s: address struct size " 7482120585Ssam "mismatched.\n", __func__)); 7483181803Sbz V_pfkeystat.out_invaddr++; 7484105197Ssam error = EINVAL; 7485105197Ssam goto senderror; 7486105197Ssam } 7487105197Ssam 7488105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7489105197Ssam case AF_INET: 7490105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 7491105197Ssam sizeof(struct sockaddr_in)) { 7492181803Sbz V_pfkeystat.out_invaddr++; 7493105197Ssam error = EINVAL; 7494105197Ssam goto senderror; 7495105197Ssam } 7496105197Ssam break; 7497105197Ssam case AF_INET6: 7498105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 7499105197Ssam sizeof(struct sockaddr_in6)) { 7500181803Sbz V_pfkeystat.out_invaddr++; 7501105197Ssam error = EINVAL; 7502105197Ssam goto senderror; 7503105197Ssam } 7504105197Ssam break; 7505105197Ssam default: 7506120585Ssam ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 7507120585Ssam __func__)); 7508181803Sbz V_pfkeystat.out_invaddr++; 7509105197Ssam error = EAFNOSUPPORT; 7510105197Ssam goto senderror; 7511105197Ssam } 7512105197Ssam 7513105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7514105197Ssam case AF_INET: 7515105197Ssam plen = sizeof(struct in_addr) << 3; 7516105197Ssam break; 7517105197Ssam case AF_INET6: 7518105197Ssam plen = sizeof(struct in6_addr) << 3; 7519105197Ssam break; 7520105197Ssam default: 7521105197Ssam plen = 0; /*fool gcc*/ 7522105197Ssam break; 7523105197Ssam } 7524105197Ssam 7525105197Ssam /* check max prefix length */ 7526105197Ssam if (src0->sadb_address_prefixlen > plen || 7527105197Ssam dst0->sadb_address_prefixlen > plen) { 7528120585Ssam ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n", 7529120585Ssam __func__)); 7530181803Sbz V_pfkeystat.out_invaddr++; 7531105197Ssam error = EINVAL; 7532105197Ssam goto senderror; 7533105197Ssam } 7534105197Ssam 7535105197Ssam /* 7536105197Ssam * prefixlen == 0 is valid because there can be a case when 7537105197Ssam * all addresses are matched. 7538105197Ssam */ 7539105197Ssam } 7540105197Ssam 7541105197Ssam if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7542105197Ssam key_typesw[msg->sadb_msg_type] == NULL) { 7543181803Sbz V_pfkeystat.out_invmsgtype++; 7544105197Ssam error = EINVAL; 7545105197Ssam goto senderror; 7546105197Ssam } 7547105197Ssam 7548105197Ssam return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7549105197Ssam 7550105197Ssamsenderror: 7551105197Ssam msg->sadb_msg_errno = error; 7552105197Ssam return key_sendup_mbuf(so, m, target); 7553105197Ssam} 7554105197Ssam 7555105197Ssamstatic int 7556105197Ssamkey_senderror(so, m, code) 7557105197Ssam struct socket *so; 7558105197Ssam struct mbuf *m; 7559105197Ssam int code; 7560105197Ssam{ 7561105197Ssam struct sadb_msg *msg; 7562105197Ssam 7563120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7564120585Ssam ("mbuf too small, len %u", m->m_len)); 7565105197Ssam 7566105197Ssam msg = mtod(m, struct sadb_msg *); 7567105197Ssam msg->sadb_msg_errno = code; 7568105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7569105197Ssam} 7570105197Ssam 7571105197Ssam/* 7572105197Ssam * set the pointer to each header into message buffer. 7573105197Ssam * m will be freed on error. 7574105197Ssam * XXX larger-than-MCLBYTES extension? 7575105197Ssam */ 7576105197Ssamstatic int 7577105197Ssamkey_align(m, mhp) 7578105197Ssam struct mbuf *m; 7579105197Ssam struct sadb_msghdr *mhp; 7580105197Ssam{ 7581105197Ssam struct mbuf *n; 7582105197Ssam struct sadb_ext *ext; 7583105197Ssam size_t off, end; 7584105197Ssam int extlen; 7585105197Ssam int toff; 7586105197Ssam 7587120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7588120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7589120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7590120585Ssam ("mbuf too small, len %u", m->m_len)); 7591105197Ssam 7592105197Ssam /* initialize */ 7593105197Ssam bzero(mhp, sizeof(*mhp)); 7594105197Ssam 7595105197Ssam mhp->msg = mtod(m, struct sadb_msg *); 7596105197Ssam mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7597105197Ssam 7598105197Ssam end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7599105197Ssam extlen = end; /*just in case extlen is not updated*/ 7600105197Ssam for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7601105197Ssam n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7602105197Ssam if (!n) { 7603105197Ssam /* m is already freed */ 7604105197Ssam return ENOBUFS; 7605105197Ssam } 7606105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7607105197Ssam 7608105197Ssam /* set pointer */ 7609105197Ssam switch (ext->sadb_ext_type) { 7610105197Ssam case SADB_EXT_SA: 7611105197Ssam case SADB_EXT_ADDRESS_SRC: 7612105197Ssam case SADB_EXT_ADDRESS_DST: 7613105197Ssam case SADB_EXT_ADDRESS_PROXY: 7614105197Ssam case SADB_EXT_LIFETIME_CURRENT: 7615105197Ssam case SADB_EXT_LIFETIME_HARD: 7616105197Ssam case SADB_EXT_LIFETIME_SOFT: 7617105197Ssam case SADB_EXT_KEY_AUTH: 7618105197Ssam case SADB_EXT_KEY_ENCRYPT: 7619105197Ssam case SADB_EXT_IDENTITY_SRC: 7620105197Ssam case SADB_EXT_IDENTITY_DST: 7621105197Ssam case SADB_EXT_SENSITIVITY: 7622105197Ssam case SADB_EXT_PROPOSAL: 7623105197Ssam case SADB_EXT_SUPPORTED_AUTH: 7624105197Ssam case SADB_EXT_SUPPORTED_ENCRYPT: 7625105197Ssam case SADB_EXT_SPIRANGE: 7626105197Ssam case SADB_X_EXT_POLICY: 7627105197Ssam case SADB_X_EXT_SA2: 7628194062Svanhu#ifdef IPSEC_NAT_T 7629194062Svanhu case SADB_X_EXT_NAT_T_TYPE: 7630194062Svanhu case SADB_X_EXT_NAT_T_SPORT: 7631194062Svanhu case SADB_X_EXT_NAT_T_DPORT: 7632194062Svanhu case SADB_X_EXT_NAT_T_OAI: 7633194062Svanhu case SADB_X_EXT_NAT_T_OAR: 7634194062Svanhu case SADB_X_EXT_NAT_T_FRAG: 7635194062Svanhu#endif 7636105197Ssam /* duplicate check */ 7637105197Ssam /* 7638105197Ssam * XXX Are there duplication payloads of either 7639105197Ssam * KEY_AUTH or KEY_ENCRYPT ? 7640105197Ssam */ 7641105197Ssam if (mhp->ext[ext->sadb_ext_type] != NULL) { 7642120585Ssam ipseclog((LOG_DEBUG, "%s: duplicate ext_type " 7643120585Ssam "%u\n", __func__, ext->sadb_ext_type)); 7644105197Ssam m_freem(m); 7645181803Sbz V_pfkeystat.out_dupext++; 7646105197Ssam return EINVAL; 7647105197Ssam } 7648105197Ssam break; 7649105197Ssam default: 7650120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 7651120585Ssam __func__, ext->sadb_ext_type)); 7652105197Ssam m_freem(m); 7653181803Sbz V_pfkeystat.out_invexttype++; 7654105197Ssam return EINVAL; 7655105197Ssam } 7656105197Ssam 7657105197Ssam extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7658105197Ssam 7659105197Ssam if (key_validate_ext(ext, extlen)) { 7660105197Ssam m_freem(m); 7661181803Sbz V_pfkeystat.out_invlen++; 7662105197Ssam return EINVAL; 7663105197Ssam } 7664105197Ssam 7665105197Ssam n = m_pulldown(m, off, extlen, &toff); 7666105197Ssam if (!n) { 7667105197Ssam /* m is already freed */ 7668105197Ssam return ENOBUFS; 7669105197Ssam } 7670105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7671105197Ssam 7672105197Ssam mhp->ext[ext->sadb_ext_type] = ext; 7673105197Ssam mhp->extoff[ext->sadb_ext_type] = off; 7674105197Ssam mhp->extlen[ext->sadb_ext_type] = extlen; 7675105197Ssam } 7676105197Ssam 7677105197Ssam if (off != end) { 7678105197Ssam m_freem(m); 7679181803Sbz V_pfkeystat.out_invlen++; 7680105197Ssam return EINVAL; 7681105197Ssam } 7682105197Ssam 7683105197Ssam return 0; 7684105197Ssam} 7685105197Ssam 7686105197Ssamstatic int 7687105197Ssamkey_validate_ext(ext, len) 7688105197Ssam const struct sadb_ext *ext; 7689105197Ssam int len; 7690105197Ssam{ 7691105197Ssam const struct sockaddr *sa; 7692105197Ssam enum { NONE, ADDR } checktype = NONE; 7693105197Ssam int baselen = 0; 7694105197Ssam const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7695105197Ssam 7696105197Ssam if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7697105197Ssam return EINVAL; 7698105197Ssam 7699105197Ssam /* if it does not match minimum/maximum length, bail */ 7700105197Ssam if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7701105197Ssam ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7702105197Ssam return EINVAL; 7703105197Ssam if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7704105197Ssam return EINVAL; 7705105197Ssam if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7706105197Ssam return EINVAL; 7707105197Ssam 7708105197Ssam /* more checks based on sadb_ext_type XXX need more */ 7709105197Ssam switch (ext->sadb_ext_type) { 7710105197Ssam case SADB_EXT_ADDRESS_SRC: 7711105197Ssam case SADB_EXT_ADDRESS_DST: 7712105197Ssam case SADB_EXT_ADDRESS_PROXY: 7713105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7714105197Ssam checktype = ADDR; 7715105197Ssam break; 7716105197Ssam case SADB_EXT_IDENTITY_SRC: 7717105197Ssam case SADB_EXT_IDENTITY_DST: 7718105197Ssam if (((const struct sadb_ident *)ext)->sadb_ident_type == 7719105197Ssam SADB_X_IDENTTYPE_ADDR) { 7720105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7721105197Ssam checktype = ADDR; 7722105197Ssam } else 7723105197Ssam checktype = NONE; 7724105197Ssam break; 7725105197Ssam default: 7726105197Ssam checktype = NONE; 7727105197Ssam break; 7728105197Ssam } 7729105197Ssam 7730105197Ssam switch (checktype) { 7731105197Ssam case NONE: 7732105197Ssam break; 7733105197Ssam case ADDR: 7734105197Ssam sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7735105197Ssam if (len < baselen + sal) 7736105197Ssam return EINVAL; 7737105197Ssam if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7738105197Ssam return EINVAL; 7739105197Ssam break; 7740105197Ssam } 7741105197Ssam 7742105197Ssam return 0; 7743105197Ssam} 7744105197Ssam 7745105197Ssamvoid 7746180086Sjuliankey_init(void) 7747105197Ssam{ 7748105197Ssam int i; 7749105197Ssam 7750119643Ssam for (i = 0; i < IPSEC_DIR_MAX; i++) 7751181803Sbz LIST_INIT(&V_sptree[i]); 7752105197Ssam 7753181803Sbz LIST_INIT(&V_sahtree); 7754105197Ssam 7755119643Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) 7756181803Sbz LIST_INIT(&V_regtree[i]); 7757105197Ssam 7758181803Sbz LIST_INIT(&V_acqtree); 7759181803Sbz LIST_INIT(&V_spacqtree); 7760105197Ssam 7761105197Ssam /* system default */ 7762181803Sbz V_ip4_def_policy.policy = IPSEC_POLICY_NONE; 7763181803Sbz V_ip4_def_policy.refcnt++; /*never reclaim this*/ 7764105197Ssam 7765190787Szec if (!IS_DEFAULT_VNET(curvnet)) 7766190787Szec return; 7767190787Szec 7768190787Szec SPTREE_LOCK_INIT(); 7769190787Szec REGTREE_LOCK_INIT(); 7770190787Szec SAHTREE_LOCK_INIT(); 7771190787Szec ACQ_LOCK_INIT(); 7772190787Szec SPACQ_LOCK_INIT(); 7773190787Szec 7774105197Ssam#ifndef IPSEC_DEBUG2 7775105197Ssam timeout((void *)key_timehandler, (void *)0, hz); 7776105197Ssam#endif /*IPSEC_DEBUG2*/ 7777105197Ssam 7778105197Ssam /* initialize key statistics */ 7779105197Ssam keystat.getspi_count = 1; 7780105197Ssam 7781177173Sbz printf("IPsec: Initialized Security Association Processing.\n"); 7782193731Szec} 7783105197Ssam 7784193731Szec#ifdef VIMAGE 7785193731Szecvoid 7786193731Szeckey_destroy(void) 7787193731Szec{ 7788193731Szec struct secpolicy *sp, *nextsp; 7789205789Sbz struct secacq *acq, *nextacq; 7790205789Sbz struct secspacq *spacq, *nextspacq; 7791193731Szec struct secashead *sah, *nextsah; 7792193731Szec struct secreg *reg; 7793193731Szec int i; 7794193731Szec 7795193731Szec SPTREE_LOCK(); 7796193731Szec for (i = 0; i < IPSEC_DIR_MAX; i++) { 7797193731Szec for (sp = LIST_FIRST(&V_sptree[i]); 7798193731Szec sp != NULL; sp = nextsp) { 7799193731Szec nextsp = LIST_NEXT(sp, chain); 7800193731Szec if (__LIST_CHAINED(sp)) { 7801193731Szec LIST_REMOVE(sp, chain); 7802193731Szec free(sp, M_IPSEC_SP); 7803193731Szec } 7804193731Szec } 7805193731Szec } 7806193731Szec SPTREE_UNLOCK(); 7807193731Szec 7808193731Szec SAHTREE_LOCK(); 7809193731Szec for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) { 7810193731Szec nextsah = LIST_NEXT(sah, chain); 7811193731Szec if (__LIST_CHAINED(sah)) { 7812193731Szec LIST_REMOVE(sah, chain); 7813193731Szec free(sah, M_IPSEC_SAH); 7814193731Szec } 7815193731Szec } 7816193731Szec SAHTREE_UNLOCK(); 7817193731Szec 7818193731Szec REGTREE_LOCK(); 7819193731Szec for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7820193731Szec LIST_FOREACH(reg, &V_regtree[i], chain) { 7821193731Szec if (__LIST_CHAINED(reg)) { 7822193731Szec LIST_REMOVE(reg, chain); 7823193731Szec free(reg, M_IPSEC_SAR); 7824193731Szec break; 7825193731Szec } 7826193731Szec } 7827193731Szec } 7828193731Szec REGTREE_UNLOCK(); 7829193731Szec 7830193731Szec ACQ_LOCK(); 7831205789Sbz for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 7832193731Szec nextacq = LIST_NEXT(acq, chain); 7833193731Szec if (__LIST_CHAINED(acq)) { 7834193731Szec LIST_REMOVE(acq, chain); 7835193731Szec free(acq, M_IPSEC_SAQ); 7836193731Szec } 7837193731Szec } 7838193731Szec ACQ_UNLOCK(); 7839193731Szec 7840193731Szec SPACQ_LOCK(); 7841205789Sbz for (spacq = LIST_FIRST(&V_spacqtree); spacq != NULL; 7842205789Sbz spacq = nextspacq) { 7843205789Sbz nextspacq = LIST_NEXT(spacq, chain); 7844205789Sbz if (__LIST_CHAINED(spacq)) { 7845205789Sbz LIST_REMOVE(spacq, chain); 7846205789Sbz free(spacq, M_IPSEC_SAQ); 7847193731Szec } 7848193731Szec } 7849193731Szec SPACQ_UNLOCK(); 7850105197Ssam} 7851193731Szec#endif 7852105197Ssam 7853105197Ssam/* 7854105197Ssam * XXX: maybe This function is called after INBOUND IPsec processing. 7855105197Ssam * 7856105197Ssam * Special check for tunnel-mode packets. 7857105197Ssam * We must make some checks for consistency between inner and outer IP header. 7858105197Ssam * 7859105197Ssam * xxx more checks to be provided 7860105197Ssam */ 7861105197Ssamint 7862105197Ssamkey_checktunnelsanity(sav, family, src, dst) 7863105197Ssam struct secasvar *sav; 7864105197Ssam u_int family; 7865105197Ssam caddr_t src; 7866105197Ssam caddr_t dst; 7867105197Ssam{ 7868120585Ssam IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7869105197Ssam 7870105197Ssam /* XXX: check inner IP header */ 7871105197Ssam 7872105197Ssam return 1; 7873105197Ssam} 7874105197Ssam 7875105197Ssam/* record data transfer on SA, and update timestamps */ 7876105197Ssamvoid 7877105197Ssamkey_sa_recordxfer(sav, m) 7878105197Ssam struct secasvar *sav; 7879105197Ssam struct mbuf *m; 7880105197Ssam{ 7881120585Ssam IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7882120585Ssam IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7883105197Ssam if (!sav->lft_c) 7884105197Ssam return; 7885105197Ssam 7886105197Ssam /* 7887105197Ssam * XXX Currently, there is a difference of bytes size 7888105197Ssam * between inbound and outbound processing. 7889105197Ssam */ 7890157123Sgnn sav->lft_c->bytes += m->m_pkthdr.len; 7891105197Ssam /* to check bytes lifetime is done in key_timehandler(). */ 7892105197Ssam 7893105197Ssam /* 7894105197Ssam * We use the number of packets as the unit of 7895157123Sgnn * allocations. We increment the variable 7896105197Ssam * whenever {esp,ah}_{in,out}put is called. 7897105197Ssam */ 7898157123Sgnn sav->lft_c->allocations++; 7899105197Ssam /* XXX check for expires? */ 7900105197Ssam 7901105197Ssam /* 7902157123Sgnn * NOTE: We record CURRENT usetime by using wall clock, 7903105197Ssam * in seconds. HARD and SOFT lifetime are measured by the time 7904157123Sgnn * difference (again in seconds) from usetime. 7905105197Ssam * 7906105197Ssam * usetime 7907105197Ssam * v expire expire 7908105197Ssam * -----+-----+--------+---> t 7909105197Ssam * <--------------> HARD 7910105197Ssam * <-----> SOFT 7911105197Ssam */ 7912157123Sgnn sav->lft_c->usetime = time_second; 7913105197Ssam /* XXX check for expires? */ 7914105197Ssam 7915105197Ssam return; 7916105197Ssam} 7917105197Ssam 7918105197Ssam/* dumb version */ 7919105197Ssamvoid 7920105197Ssamkey_sa_routechange(dst) 7921105197Ssam struct sockaddr *dst; 7922105197Ssam{ 7923105197Ssam struct secashead *sah; 7924105197Ssam struct route *ro; 7925105197Ssam 7926120585Ssam SAHTREE_LOCK(); 7927181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7928105197Ssam ro = &sah->sa_route; 7929105197Ssam if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7930105197Ssam && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7931105197Ssam RTFREE(ro->ro_rt); 7932105197Ssam ro->ro_rt = (struct rtentry *)NULL; 7933105197Ssam } 7934105197Ssam } 7935120585Ssam SAHTREE_UNLOCK(); 7936105197Ssam} 7937105197Ssam 7938105197Ssamstatic void 7939189004Srdivackykey_sa_chgstate(struct secasvar *sav, u_int8_t state) 7940105197Ssam{ 7941120585Ssam IPSEC_ASSERT(sav != NULL, ("NULL sav")); 7942120585Ssam SAHTREE_LOCK_ASSERT(); 7943105197Ssam 7944119643Ssam if (sav->state != state) { 7945119643Ssam if (__LIST_CHAINED(sav)) 7946119643Ssam LIST_REMOVE(sav, chain); 7947119643Ssam sav->state = state; 7948119643Ssam LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7949119643Ssam } 7950105197Ssam} 7951105197Ssam 7952105197Ssamvoid 7953105197Ssamkey_sa_stir_iv(sav) 7954105197Ssam struct secasvar *sav; 7955105197Ssam{ 7956105197Ssam 7957120585Ssam IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 7958105197Ssam key_randomfill(sav->iv, sav->ivlen); 7959105197Ssam} 7960105197Ssam 7961105197Ssam/* XXX too much? */ 7962105197Ssamstatic struct mbuf * 7963105197Ssamkey_alloc_mbuf(l) 7964105197Ssam int l; 7965105197Ssam{ 7966105197Ssam struct mbuf *m = NULL, *n; 7967105197Ssam int len, t; 7968105197Ssam 7969105197Ssam len = l; 7970105197Ssam while (len > 0) { 7971111119Simp MGET(n, M_DONTWAIT, MT_DATA); 7972105197Ssam if (n && len > MLEN) 7973111119Simp MCLGET(n, M_DONTWAIT); 7974105197Ssam if (!n) { 7975105197Ssam m_freem(m); 7976105197Ssam return NULL; 7977105197Ssam } 7978105197Ssam 7979105197Ssam n->m_next = NULL; 7980105197Ssam n->m_len = 0; 7981105197Ssam n->m_len = M_TRAILINGSPACE(n); 7982105197Ssam /* use the bottom of mbuf, hoping we can prepend afterwards */ 7983105197Ssam if (n->m_len > len) { 7984105197Ssam t = (n->m_len - len) & ~(sizeof(long) - 1); 7985105197Ssam n->m_data += t; 7986105197Ssam n->m_len = len; 7987105197Ssam } 7988105197Ssam 7989105197Ssam len -= n->m_len; 7990105197Ssam 7991105197Ssam if (m) 7992105197Ssam m_cat(m, n); 7993105197Ssam else 7994105197Ssam m = n; 7995105197Ssam } 7996105197Ssam 7997105197Ssam return m; 7998105197Ssam} 7999157123Sgnn 8000157123Sgnn/* 8001157123Sgnn * Take one of the kernel's security keys and convert it into a PF_KEY 8002157123Sgnn * structure within an mbuf, suitable for sending up to a waiting 8003157123Sgnn * application in user land. 8004157123Sgnn * 8005157123Sgnn * IN: 8006157123Sgnn * src: A pointer to a kernel security key. 8007157123Sgnn * exttype: Which type of key this is. Refer to the PF_KEY data structures. 8008157123Sgnn * OUT: 8009157123Sgnn * a valid mbuf or NULL indicating an error 8010157123Sgnn * 8011157123Sgnn */ 8012157123Sgnn 8013157123Sgnnstatic struct mbuf * 8014157123Sgnnkey_setkey(struct seckey *src, u_int16_t exttype) 8015157123Sgnn{ 8016157123Sgnn struct mbuf *m; 8017157123Sgnn struct sadb_key *p; 8018170799Sbz int len; 8019157123Sgnn 8020157123Sgnn if (src == NULL) 8021157123Sgnn return NULL; 8022157123Sgnn 8023170799Sbz len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); 8024157123Sgnn m = key_alloc_mbuf(len); 8025157123Sgnn if (m == NULL) 8026157123Sgnn return NULL; 8027157123Sgnn p = mtod(m, struct sadb_key *); 8028157123Sgnn bzero(p, len); 8029157123Sgnn p->sadb_key_len = PFKEY_UNIT64(len); 8030157123Sgnn p->sadb_key_exttype = exttype; 8031157123Sgnn p->sadb_key_bits = src->bits; 8032157123Sgnn bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src)); 8033157123Sgnn 8034157123Sgnn return m; 8035157123Sgnn} 8036157123Sgnn 8037157123Sgnn/* 8038157123Sgnn * Take one of the kernel's lifetime data structures and convert it 8039157123Sgnn * into a PF_KEY structure within an mbuf, suitable for sending up to 8040157123Sgnn * a waiting application in user land. 8041157123Sgnn * 8042157123Sgnn * IN: 8043157123Sgnn * src: A pointer to a kernel lifetime structure. 8044157123Sgnn * exttype: Which type of lifetime this is. Refer to the PF_KEY 8045157123Sgnn * data structures for more information. 8046157123Sgnn * OUT: 8047157123Sgnn * a valid mbuf or NULL indicating an error 8048157123Sgnn * 8049157123Sgnn */ 8050157123Sgnn 8051157123Sgnnstatic struct mbuf * 8052157123Sgnnkey_setlifetime(struct seclifetime *src, u_int16_t exttype) 8053157123Sgnn{ 8054157123Sgnn struct mbuf *m = NULL; 8055157123Sgnn struct sadb_lifetime *p; 8056157123Sgnn int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime)); 8057157123Sgnn 8058157123Sgnn if (src == NULL) 8059157123Sgnn return NULL; 8060157123Sgnn 8061157123Sgnn m = key_alloc_mbuf(len); 8062157123Sgnn if (m == NULL) 8063157123Sgnn return m; 8064157123Sgnn p = mtod(m, struct sadb_lifetime *); 8065157123Sgnn 8066157123Sgnn bzero(p, len); 8067157123Sgnn p->sadb_lifetime_len = PFKEY_UNIT64(len); 8068157123Sgnn p->sadb_lifetime_exttype = exttype; 8069157123Sgnn p->sadb_lifetime_allocations = src->allocations; 8070157123Sgnn p->sadb_lifetime_bytes = src->bytes; 8071157123Sgnn p->sadb_lifetime_addtime = src->addtime; 8072157123Sgnn p->sadb_lifetime_usetime = src->usetime; 8073157123Sgnn 8074157123Sgnn return m; 8075157123Sgnn 8076157123Sgnn} 8077