key.c revision 206659
1105197Ssam/* $FreeBSD: head/sys/netipsec/key.c 206659 2010-04-15 12:40:33Z 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; 117195727Srwatson#define V_key_spi_trycnt VNET(key_spi_trycnt) 118195699Srwatsonstatic VNET_DEFINE(u_int32_t, key_spi_minval) = 0x100; 119195727Srwatson#define V_key_spi_minval VNET(key_spi_minval) 120195699Srwatsonstatic VNET_DEFINE(u_int32_t, key_spi_maxval) = 0x0fffffff; /* XXX */ 121195727Srwatson#define V_key_spi_maxval VNET(key_spi_maxval) 122195699Srwatsonstatic VNET_DEFINE(u_int32_t, policy_id) = 0; 123195727Srwatson#define V_policy_id VNET(policy_id) 124195699Srwatson/*interval to initialize randseed,1(m)*/ 125195699Srwatsonstatic VNET_DEFINE(u_int, key_int_random) = 60; 126195727Srwatson#define V_key_int_random VNET(key_int_random) 127195699Srwatson/* interval to expire acquiring, 30(s)*/ 128195699Srwatsonstatic VNET_DEFINE(u_int, key_larval_lifetime) = 30; 129195727Srwatson#define V_key_larval_lifetime VNET(key_larval_lifetime) 130195699Srwatson/* counter for blocking SADB_ACQUIRE.*/ 131195699Srwatsonstatic VNET_DEFINE(int, key_blockacq_count) = 10; 132195727Srwatson#define V_key_blockacq_count VNET(key_blockacq_count) 133195699Srwatson/* lifetime for blocking SADB_ACQUIRE.*/ 134195699Srwatsonstatic VNET_DEFINE(int, key_blockacq_lifetime) = 20; 135195727Srwatson#define V_key_blockacq_lifetime VNET(key_blockacq_lifetime) 136195699Srwatson/* preferred old sa rather than new sa.*/ 137195699Srwatsonstatic VNET_DEFINE(int, key_preferred_oldsa) = 1; 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; 273195727Srwatson#define V_ipsec_esp_keymin VNET(ipsec_esp_keymin) 274195699Srwatsonstatic VNET_DEFINE(int, ipsec_esp_auth) = 0; 275195727Srwatson#define V_ipsec_esp_auth VNET(ipsec_esp_auth) 276195699Srwatsonstatic VNET_DEFINE(int, ipsec_ah_keymin) = 128; 277195727Srwatson#define V_ipsec_ah_keymin VNET(ipsec_ah_keymin) 278195699Srwatson 279105197Ssam#ifdef SYSCTL_DECL 280105197SsamSYSCTL_DECL(_net_key); 281105197Ssam#endif 282105197Ssam 283195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, 284195699Srwatson CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, ""); 285105197Ssam 286105197Ssam/* max count of trial for the decision of spi value */ 287195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, 288195699Srwatson CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, ""); 289105197Ssam 290105197Ssam/* minimum spi value to allocate automatically. */ 291195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MIN_VALUE, 292195699Srwatson spi_minval, CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, ""); 293105197Ssam 294105197Ssam/* maximun spi value to allocate automatically. */ 295195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MAX_VALUE, 296195699Srwatson spi_maxval, CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, ""); 297105197Ssam 298105197Ssam/* interval to initialize randseed */ 299195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_RANDOM_INT, 300195699Srwatson int_random, CTLFLAG_RW, &VNET_NAME(key_int_random), 0, ""); 301105197Ssam 302105197Ssam/* lifetime for larval SA */ 303195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_LARVAL_LIFETIME, 304195699Srwatson larval_lifetime, CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, ""); 305105197Ssam 306105197Ssam/* counter for blocking to send SADB_ACQUIRE to IKEd */ 307195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, 308195699Srwatson blockacq_count, CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, ""); 309105197Ssam 310105197Ssam/* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 311195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, 312195699Srwatson blockacq_lifetime, CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, ""); 313105197Ssam 314105197Ssam/* ESP auth */ 315195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, 316195699Srwatson CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, ""); 317105197Ssam 318105197Ssam/* minimum ESP key length */ 319195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_ESP_KEYMIN, 320195699Srwatson esp_keymin, CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, ""); 321105197Ssam 322105197Ssam/* minimum AH key length */ 323195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, 324195699Srwatson CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, ""); 325105197Ssam 326105197Ssam/* perfered old SA rather than new SA */ 327195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_PREFERED_OLDSA, 328195699Srwatson preferred_oldsa, CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, ""); 329105197Ssam 330105197Ssam#define __LIST_CHAINED(elm) \ 331105197Ssam (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 332105197Ssam#define LIST_INSERT_TAIL(head, elm, type, field) \ 333105197Ssamdo {\ 334105197Ssam struct type *curelm = LIST_FIRST(head); \ 335105197Ssam if (curelm == NULL) {\ 336105197Ssam LIST_INSERT_HEAD(head, elm, field); \ 337105197Ssam } else { \ 338105197Ssam while (LIST_NEXT(curelm, field)) \ 339105197Ssam curelm = LIST_NEXT(curelm, field);\ 340105197Ssam LIST_INSERT_AFTER(curelm, elm, field);\ 341105197Ssam }\ 342105197Ssam} while (0) 343105197Ssam 344105197Ssam#define KEY_CHKSASTATE(head, sav, name) \ 345105197Ssamdo { \ 346105197Ssam if ((head) != (sav)) { \ 347105197Ssam ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 348105197Ssam (name), (head), (sav))); \ 349105197Ssam continue; \ 350105197Ssam } \ 351105197Ssam} while (0) 352105197Ssam 353105197Ssam#define KEY_CHKSPDIR(head, sp, name) \ 354105197Ssamdo { \ 355105197Ssam if ((head) != (sp)) { \ 356105197Ssam ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 357105197Ssam "anyway continue.\n", \ 358105197Ssam (name), (head), (sp))); \ 359105197Ssam } \ 360105197Ssam} while (0) 361105197Ssam 362119643SsamMALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association"); 363119643SsamMALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head"); 364119643SsamMALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy"); 365119643SsamMALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request"); 366119643SsamMALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous"); 367119643SsamMALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire"); 368119643SsamMALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire"); 369105197Ssam 370105197Ssam/* 371105197Ssam * set parameters into secpolicyindex buffer. 372105197Ssam * Must allocate secpolicyindex buffer passed to this function. 373105197Ssam */ 374105197Ssam#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 375105197Ssamdo { \ 376105197Ssam bzero((idx), sizeof(struct secpolicyindex)); \ 377105197Ssam (idx)->dir = (_dir); \ 378105197Ssam (idx)->prefs = (ps); \ 379105197Ssam (idx)->prefd = (pd); \ 380105197Ssam (idx)->ul_proto = (ulp); \ 381105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 382105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 383105197Ssam} while (0) 384105197Ssam 385105197Ssam/* 386105197Ssam * set parameters into secasindex buffer. 387105197Ssam * Must allocate secasindex buffer before calling this function. 388105197Ssam */ 389105197Ssam#define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 390105197Ssamdo { \ 391105197Ssam bzero((idx), sizeof(struct secasindex)); \ 392105197Ssam (idx)->proto = (p); \ 393105197Ssam (idx)->mode = (m); \ 394105197Ssam (idx)->reqid = (r); \ 395105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 396105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 397105197Ssam} while (0) 398105197Ssam 399105197Ssam/* key statistics */ 400105197Ssamstruct _keystat { 401105197Ssam u_long getspi_count; /* the avarage of count to try to get new SPI */ 402105197Ssam} keystat; 403105197Ssam 404105197Ssamstruct sadb_msghdr { 405105197Ssam struct sadb_msg *msg; 406105197Ssam struct sadb_ext *ext[SADB_EXT_MAX + 1]; 407105197Ssam int extoff[SADB_EXT_MAX + 1]; 408105197Ssam int extlen[SADB_EXT_MAX + 1]; 409105197Ssam}; 410105197Ssam 411105197Ssamstatic struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 412105197Ssamstatic void key_freesp_so __P((struct secpolicy **)); 413105197Ssamstatic struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 414105197Ssamstatic void key_delsp __P((struct secpolicy *)); 415105197Ssamstatic struct secpolicy *key_getsp __P((struct secpolicyindex *)); 416119643Ssamstatic void _key_delsp(struct secpolicy *sp); 417105197Ssamstatic struct secpolicy *key_getspbyid __P((u_int32_t)); 418105197Ssamstatic u_int32_t key_newreqid __P((void)); 419105197Ssamstatic struct mbuf *key_gather_mbuf __P((struct mbuf *, 420105197Ssam const struct sadb_msghdr *, int, int, ...)); 421105197Ssamstatic int key_spdadd __P((struct socket *, struct mbuf *, 422105197Ssam const struct sadb_msghdr *)); 423105197Ssamstatic u_int32_t key_getnewspid __P((void)); 424105197Ssamstatic int key_spddelete __P((struct socket *, struct mbuf *, 425105197Ssam const struct sadb_msghdr *)); 426105197Ssamstatic int key_spddelete2 __P((struct socket *, struct mbuf *, 427105197Ssam const struct sadb_msghdr *)); 428105197Ssamstatic int key_spdget __P((struct socket *, struct mbuf *, 429105197Ssam const struct sadb_msghdr *)); 430105197Ssamstatic int key_spdflush __P((struct socket *, struct mbuf *, 431105197Ssam const struct sadb_msghdr *)); 432105197Ssamstatic int key_spddump __P((struct socket *, struct mbuf *, 433105197Ssam const struct sadb_msghdr *)); 434105197Ssamstatic struct mbuf *key_setdumpsp __P((struct secpolicy *, 435105197Ssam u_int8_t, u_int32_t, u_int32_t)); 436105197Ssamstatic u_int key_getspreqmsglen __P((struct secpolicy *)); 437105197Ssamstatic int key_spdexpire __P((struct secpolicy *)); 438105197Ssamstatic struct secashead *key_newsah __P((struct secasindex *)); 439105197Ssamstatic void key_delsah __P((struct secashead *)); 440105197Ssamstatic struct secasvar *key_newsav __P((struct mbuf *, 441105197Ssam const struct sadb_msghdr *, struct secashead *, int *, 442105197Ssam const char*, int)); 443105197Ssam#define KEY_NEWSAV(m, sadb, sah, e) \ 444105197Ssam key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 445105197Ssamstatic void key_delsav __P((struct secasvar *)); 446105197Ssamstatic struct secashead *key_getsah __P((struct secasindex *)); 447105197Ssamstatic struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 448105197Ssamstatic struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 449105197Ssamstatic int key_setsaval __P((struct secasvar *, struct mbuf *, 450105197Ssam const struct sadb_msghdr *)); 451105197Ssamstatic int key_mature __P((struct secasvar *)); 452105197Ssamstatic struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 453105197Ssam u_int8_t, u_int32_t, u_int32_t)); 454105197Ssamstatic struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 455105197Ssam u_int32_t, pid_t, u_int16_t)); 456105197Ssamstatic struct mbuf *key_setsadbsa __P((struct secasvar *)); 457105197Ssamstatic struct mbuf *key_setsadbaddr __P((u_int16_t, 458105197Ssam const struct sockaddr *, u_int8_t, u_int16_t)); 459194062Svanhu#ifdef IPSEC_NAT_T 460194062Svanhustatic struct mbuf *key_setsadbxport(u_int16_t, u_int16_t); 461194062Svanhustatic struct mbuf *key_setsadbxtype(u_int16_t); 462194062Svanhu#endif 463194062Svanhustatic void key_porttosaddr(struct sockaddr *, u_int16_t); 464194062Svanhu#define KEY_PORTTOSADDR(saddr, port) \ 465194062Svanhu key_porttosaddr((struct sockaddr *)(saddr), (port)) 466105197Ssamstatic struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); 467105197Ssamstatic struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 468105197Ssam u_int32_t)); 469157123Sgnnstatic struct seckey *key_dup_keymsg(const struct sadb_key *, u_int, 470157123Sgnn struct malloc_type *); 471157123Sgnnstatic struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src, 472157123Sgnn struct malloc_type *type); 473105197Ssam#ifdef INET6 474105197Ssamstatic int key_ismyaddr6 __P((struct sockaddr_in6 *)); 475105197Ssam#endif 476105197Ssam 477105197Ssam/* flags for key_cmpsaidx() */ 478105197Ssam#define CMP_HEAD 1 /* protocol, addresses. */ 479105197Ssam#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 480105197Ssam#define CMP_REQID 3 /* additionally HEAD, reaid. */ 481105197Ssam#define CMP_EXACTLY 4 /* all elements. */ 482105197Ssamstatic int key_cmpsaidx 483105197Ssam __P((const struct secasindex *, const struct secasindex *, int)); 484105197Ssam 485105197Ssamstatic int key_cmpspidx_exactly 486105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 487105197Ssamstatic int key_cmpspidx_withmask 488105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 489105197Ssamstatic int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 490105197Ssamstatic int key_bbcmp __P((const void *, const void *, u_int)); 491105197Ssamstatic u_int16_t key_satype2proto __P((u_int8_t)); 492105197Ssamstatic u_int8_t key_proto2satype __P((u_int16_t)); 493105197Ssam 494105197Ssamstatic int key_getspi __P((struct socket *, struct mbuf *, 495105197Ssam const struct sadb_msghdr *)); 496105197Ssamstatic u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 497105197Ssam struct secasindex *)); 498105197Ssamstatic int key_update __P((struct socket *, struct mbuf *, 499105197Ssam const struct sadb_msghdr *)); 500105197Ssam#ifdef IPSEC_DOSEQCHECK 501105197Ssamstatic struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 502105197Ssam#endif 503105197Ssamstatic int key_add __P((struct socket *, struct mbuf *, 504105197Ssam const struct sadb_msghdr *)); 505105197Ssamstatic int key_setident __P((struct secashead *, struct mbuf *, 506105197Ssam const struct sadb_msghdr *)); 507105197Ssamstatic struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 508105197Ssam const struct sadb_msghdr *)); 509105197Ssamstatic int key_delete __P((struct socket *, struct mbuf *, 510105197Ssam const struct sadb_msghdr *)); 511105197Ssamstatic int key_get __P((struct socket *, struct mbuf *, 512105197Ssam const struct sadb_msghdr *)); 513105197Ssam 514105197Ssamstatic void key_getcomb_setlifetime __P((struct sadb_comb *)); 515105197Ssamstatic struct mbuf *key_getcomb_esp __P((void)); 516105197Ssamstatic struct mbuf *key_getcomb_ah __P((void)); 517105197Ssamstatic struct mbuf *key_getcomb_ipcomp __P((void)); 518105197Ssamstatic struct mbuf *key_getprop __P((const struct secasindex *)); 519105197Ssam 520105197Ssamstatic int key_acquire __P((const struct secasindex *, struct secpolicy *)); 521105197Ssamstatic struct secacq *key_newacq __P((const struct secasindex *)); 522105197Ssamstatic struct secacq *key_getacq __P((const struct secasindex *)); 523105197Ssamstatic struct secacq *key_getacqbyseq __P((u_int32_t)); 524105197Ssamstatic struct secspacq *key_newspacq __P((struct secpolicyindex *)); 525105197Ssamstatic struct secspacq *key_getspacq __P((struct secpolicyindex *)); 526105197Ssamstatic int key_acquire2 __P((struct socket *, struct mbuf *, 527105197Ssam const struct sadb_msghdr *)); 528105197Ssamstatic int key_register __P((struct socket *, struct mbuf *, 529105197Ssam const struct sadb_msghdr *)); 530105197Ssamstatic int key_expire __P((struct secasvar *)); 531105197Ssamstatic int key_flush __P((struct socket *, struct mbuf *, 532105197Ssam const struct sadb_msghdr *)); 533105197Ssamstatic int key_dump __P((struct socket *, struct mbuf *, 534105197Ssam const struct sadb_msghdr *)); 535105197Ssamstatic int key_promisc __P((struct socket *, struct mbuf *, 536105197Ssam const struct sadb_msghdr *)); 537105197Ssamstatic int key_senderror __P((struct socket *, struct mbuf *, int)); 538105197Ssamstatic int key_validate_ext __P((const struct sadb_ext *, int)); 539105197Ssamstatic int key_align __P((struct mbuf *, struct sadb_msghdr *)); 540157123Sgnnstatic struct mbuf *key_setlifetime(struct seclifetime *src, 541157123Sgnn u_int16_t exttype); 542157123Sgnnstatic struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype); 543157123Sgnn 544105197Ssam#if 0 545105197Ssamstatic const char *key_getfqdn __P((void)); 546105197Ssamstatic const char *key_getuserfqdn __P((void)); 547105197Ssam#endif 548105197Ssamstatic void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 549105197Ssamstatic struct mbuf *key_alloc_mbuf __P((int)); 550105197Ssam 551158767Spjdstatic __inline void 552158767Spjdsa_initref(struct secasvar *sav) 553158767Spjd{ 554105197Ssam 555158767Spjd refcount_init(&sav->refcnt, 1); 556158767Spjd} 557158767Spjdstatic __inline void 558158767Spjdsa_addref(struct secasvar *sav) 559158767Spjd{ 560158767Spjd 561158767Spjd refcount_acquire(&sav->refcnt); 562158767Spjd IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow")); 563158767Spjd} 564158767Spjdstatic __inline int 565158767Spjdsa_delref(struct secasvar *sav) 566158767Spjd{ 567158767Spjd 568158767Spjd IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow")); 569158767Spjd return (refcount_release(&sav->refcnt)); 570158767Spjd} 571158767Spjd 572105197Ssam#define SP_ADDREF(p) do { \ 573105197Ssam (p)->refcnt++; \ 574120585Ssam IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ 575105197Ssam} while (0) 576105197Ssam#define SP_DELREF(p) do { \ 577120585Ssam IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ 578105197Ssam (p)->refcnt--; \ 579105197Ssam} while (0) 580135947Ssam 581105197Ssam 582105197Ssam/* 583135947Ssam * Update the refcnt while holding the SPTREE lock. 584135947Ssam */ 585135947Ssamvoid 586135947Ssamkey_addref(struct secpolicy *sp) 587135947Ssam{ 588135947Ssam SPTREE_LOCK(); 589135947Ssam SP_ADDREF(sp); 590135947Ssam SPTREE_UNLOCK(); 591135947Ssam} 592135947Ssam 593135947Ssam/* 594105197Ssam * Return 0 when there are known to be no SP's for the specified 595105197Ssam * direction. Otherwise return 1. This is used by IPsec code 596105197Ssam * to optimize performance. 597105197Ssam */ 598105197Ssamint 599105197Ssamkey_havesp(u_int dir) 600105197Ssam{ 601183550Szec 602105197Ssam return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 603181803Sbz LIST_FIRST(&V_sptree[dir]) != NULL : 1); 604105197Ssam} 605105197Ssam 606105197Ssam/* %%% IPsec policy management */ 607105197Ssam/* 608105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 609105197Ssam * Must call key_freesp() later. 610105197Ssam * OUT: NULL: not found 611105197Ssam * others: found and return the pointer. 612105197Ssam */ 613105197Ssamstruct secpolicy * 614105197Ssamkey_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 615105197Ssam{ 616105197Ssam struct secpolicy *sp; 617105197Ssam 618120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 619120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 620120585Ssam ("invalid direction %u", dir)); 621105197Ssam 622105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 623120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 624105197Ssam 625105197Ssam /* get a SP entry */ 626105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 627105197Ssam printf("*** objects\n"); 628105197Ssam kdebug_secpolicyindex(spidx)); 629105197Ssam 630120585Ssam SPTREE_LOCK(); 631181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 632105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 633105197Ssam printf("*** in SPD\n"); 634105197Ssam kdebug_secpolicyindex(&sp->spidx)); 635105197Ssam 636105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 637105197Ssam continue; 638105197Ssam if (key_cmpspidx_withmask(&sp->spidx, spidx)) 639105197Ssam goto found; 640105197Ssam } 641105197Ssam sp = NULL; 642105197Ssamfound: 643105197Ssam if (sp) { 644105197Ssam /* sanity check */ 645120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 646105197Ssam 647105197Ssam /* found a SPD entry */ 648105197Ssam sp->lastused = time_second; 649105197Ssam SP_ADDREF(sp); 650105197Ssam } 651120585Ssam SPTREE_UNLOCK(); 652105197Ssam 653105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 654120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 655105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 656105197Ssam return sp; 657105197Ssam} 658105197Ssam 659105197Ssam/* 660105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 661105197Ssam * Must call key_freesp() later. 662105197Ssam * OUT: NULL: not found 663105197Ssam * others: found and return the pointer. 664105197Ssam */ 665105197Ssamstruct secpolicy * 666105197Ssamkey_allocsp2(u_int32_t spi, 667105197Ssam union sockaddr_union *dst, 668105197Ssam u_int8_t proto, 669105197Ssam u_int dir, 670105197Ssam const char* where, int tag) 671105197Ssam{ 672105197Ssam struct secpolicy *sp; 673105197Ssam 674120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst")); 675120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 676120585Ssam ("invalid direction %u", dir)); 677105197Ssam 678105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 679120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 680105197Ssam 681105197Ssam /* get a SP entry */ 682105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 683105197Ssam printf("*** objects\n"); 684105197Ssam printf("spi %u proto %u dir %u\n", spi, proto, dir); 685105197Ssam kdebug_sockaddr(&dst->sa)); 686105197Ssam 687120585Ssam SPTREE_LOCK(); 688181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 689105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 690105197Ssam printf("*** in SPD\n"); 691105197Ssam kdebug_secpolicyindex(&sp->spidx)); 692105197Ssam 693105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 694105197Ssam continue; 695105197Ssam /* compare simple values, then dst address */ 696105197Ssam if (sp->spidx.ul_proto != proto) 697105197Ssam continue; 698105197Ssam /* NB: spi's must exist and match */ 699105197Ssam if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 700105197Ssam continue; 701105197Ssam if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 702105197Ssam goto found; 703105197Ssam } 704105197Ssam sp = NULL; 705105197Ssamfound: 706105197Ssam if (sp) { 707105197Ssam /* sanity check */ 708120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 709105197Ssam 710105197Ssam /* found a SPD entry */ 711105197Ssam sp->lastused = time_second; 712105197Ssam SP_ADDREF(sp); 713105197Ssam } 714120585Ssam SPTREE_UNLOCK(); 715105197Ssam 716105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 717120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 718105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 719105197Ssam return sp; 720105197Ssam} 721105197Ssam 722191599Sbz#if 0 723105197Ssam/* 724105197Ssam * return a policy that matches this particular inbound packet. 725105197Ssam * XXX slow 726105197Ssam */ 727105197Ssamstruct secpolicy * 728105197Ssamkey_gettunnel(const struct sockaddr *osrc, 729105197Ssam const struct sockaddr *odst, 730105197Ssam const struct sockaddr *isrc, 731105197Ssam const struct sockaddr *idst, 732105197Ssam const char* where, int tag) 733105197Ssam{ 734105197Ssam struct secpolicy *sp; 735105197Ssam const int dir = IPSEC_DIR_INBOUND; 736105197Ssam struct ipsecrequest *r1, *r2, *p; 737105197Ssam struct secpolicyindex spidx; 738105197Ssam 739105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 740120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 741105197Ssam 742105197Ssam if (isrc->sa_family != idst->sa_family) { 743120585Ssam ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", 744120585Ssam __func__, isrc->sa_family, idst->sa_family)); 745105197Ssam sp = NULL; 746105197Ssam goto done; 747105197Ssam } 748105197Ssam 749120585Ssam SPTREE_LOCK(); 750181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 751105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 752105197Ssam continue; 753105197Ssam 754105197Ssam r1 = r2 = NULL; 755105197Ssam for (p = sp->req; p; p = p->next) { 756105197Ssam if (p->saidx.mode != IPSEC_MODE_TUNNEL) 757105197Ssam continue; 758105197Ssam 759105197Ssam r1 = r2; 760105197Ssam r2 = p; 761105197Ssam 762105197Ssam if (!r1) { 763105197Ssam /* here we look at address matches only */ 764105197Ssam spidx = sp->spidx; 765105197Ssam if (isrc->sa_len > sizeof(spidx.src) || 766105197Ssam idst->sa_len > sizeof(spidx.dst)) 767105197Ssam continue; 768105197Ssam bcopy(isrc, &spidx.src, isrc->sa_len); 769105197Ssam bcopy(idst, &spidx.dst, idst->sa_len); 770105197Ssam if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 771105197Ssam continue; 772105197Ssam } else { 773105197Ssam if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 774105197Ssam key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 775105197Ssam continue; 776105197Ssam } 777105197Ssam 778105197Ssam if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 779105197Ssam key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 780105197Ssam continue; 781105197Ssam 782105197Ssam goto found; 783105197Ssam } 784105197Ssam } 785105197Ssam sp = NULL; 786105197Ssamfound: 787105197Ssam if (sp) { 788105197Ssam sp->lastused = time_second; 789105197Ssam SP_ADDREF(sp); 790105197Ssam } 791120585Ssam SPTREE_UNLOCK(); 792105197Ssamdone: 793105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 794120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 795105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 796105197Ssam return sp; 797105197Ssam} 798191599Sbz#endif 799105197Ssam 800105197Ssam/* 801105197Ssam * allocating an SA entry for an *OUTBOUND* packet. 802105197Ssam * checking each request entries in SP, and acquire an SA if need. 803105197Ssam * OUT: 0: there are valid requests. 804105197Ssam * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 805105197Ssam */ 806105197Ssamint 807105197Ssamkey_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 808105197Ssam{ 809105197Ssam u_int level; 810105197Ssam int error; 811105197Ssam 812120585Ssam IPSEC_ASSERT(isr != NULL, ("null isr")); 813120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 814120585Ssam IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 815105197Ssam saidx->mode == IPSEC_MODE_TUNNEL, 816120585Ssam ("unexpected policy %u", saidx->mode)); 817105197Ssam 818105197Ssam /* 819105197Ssam * XXX guard against protocol callbacks from the crypto 820105197Ssam * thread as they reference ipsecrequest.sav which we 821105197Ssam * temporarily null out below. Need to rethink how we 822105197Ssam * handle bundled SA's in the callback thread. 823105197Ssam */ 824120585Ssam IPSECREQUEST_LOCK_ASSERT(isr); 825119643Ssam 826119643Ssam /* get current level */ 827119643Ssam level = ipsec_get_reqlevel(isr); 828105197Ssam#if 0 829105197Ssam /* 830105197Ssam * We do allocate new SA only if the state of SA in the holder is 831105197Ssam * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 832105197Ssam */ 833105197Ssam if (isr->sav != NULL) { 834105197Ssam if (isr->sav->sah == NULL) 835120585Ssam panic("%s: sah is null.\n", __func__); 836105197Ssam if (isr->sav == (struct secasvar *)LIST_FIRST( 837105197Ssam &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 838105197Ssam KEY_FREESAV(&isr->sav); 839105197Ssam isr->sav = NULL; 840105197Ssam } 841105197Ssam } 842105197Ssam#else 843105197Ssam /* 844105197Ssam * we free any SA stashed in the IPsec request because a different 845105197Ssam * SA may be involved each time this request is checked, either 846105197Ssam * because new SAs are being configured, or this request is 847105197Ssam * associated with an unconnected datagram socket, or this request 848105197Ssam * is associated with a system default policy. 849105197Ssam * 850105197Ssam * The operation may have negative impact to performance. We may 851105197Ssam * want to check cached SA carefully, rather than picking new SA 852105197Ssam * every time. 853105197Ssam */ 854105197Ssam if (isr->sav != NULL) { 855105197Ssam KEY_FREESAV(&isr->sav); 856105197Ssam isr->sav = NULL; 857105197Ssam } 858105197Ssam#endif 859105197Ssam 860105197Ssam /* 861105197Ssam * new SA allocation if no SA found. 862105197Ssam * key_allocsa_policy should allocate the oldest SA available. 863105197Ssam * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 864105197Ssam */ 865105197Ssam if (isr->sav == NULL) 866105197Ssam isr->sav = key_allocsa_policy(saidx); 867105197Ssam 868105197Ssam /* When there is SA. */ 869105197Ssam if (isr->sav != NULL) { 870105197Ssam if (isr->sav->state != SADB_SASTATE_MATURE && 871105197Ssam isr->sav->state != SADB_SASTATE_DYING) 872105197Ssam return EINVAL; 873105197Ssam return 0; 874105197Ssam } 875105197Ssam 876105197Ssam /* there is no SA */ 877105197Ssam error = key_acquire(saidx, isr->sp); 878105197Ssam if (error != 0) { 879105197Ssam /* XXX What should I do ? */ 880120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 881120585Ssam __func__, error)); 882105197Ssam return error; 883105197Ssam } 884105197Ssam 885105197Ssam if (level != IPSEC_LEVEL_REQUIRE) { 886105197Ssam /* XXX sigh, the interface to this routine is botched */ 887120585Ssam IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); 888105197Ssam return 0; 889105197Ssam } else { 890105197Ssam return ENOENT; 891105197Ssam } 892105197Ssam} 893105197Ssam 894105197Ssam/* 895105197Ssam * allocating a SA for policy entry from SAD. 896105197Ssam * NOTE: searching SAD of aliving state. 897105197Ssam * OUT: NULL: not found. 898105197Ssam * others: found and return the pointer. 899105197Ssam */ 900105197Ssamstatic struct secasvar * 901105197Ssamkey_allocsa_policy(const struct secasindex *saidx) 902105197Ssam{ 903128856Ssam#define N(a) _ARRAYLEN(a) 904105197Ssam struct secashead *sah; 905105197Ssam struct secasvar *sav; 906128856Ssam u_int stateidx, arraysize; 907128856Ssam const u_int *state_valid; 908105197Ssam 909196902Spjd state_valid = NULL; /* silence gcc */ 910196902Spjd arraysize = 0; /* silence gcc */ 911196896Spjd 912120585Ssam SAHTREE_LOCK(); 913181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 914105197Ssam if (sah->state == SADB_SASTATE_DEAD) 915105197Ssam continue; 916119643Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { 917181803Sbz if (V_key_preferred_oldsa) { 918128856Ssam state_valid = saorder_state_valid_prefer_old; 919128856Ssam arraysize = N(saorder_state_valid_prefer_old); 920128856Ssam } else { 921128856Ssam state_valid = saorder_state_valid_prefer_new; 922128856Ssam arraysize = N(saorder_state_valid_prefer_new); 923128856Ssam } 924196883Spjd break; 925119643Ssam } 926105197Ssam } 927120585Ssam SAHTREE_UNLOCK(); 928196883Spjd if (sah == NULL) 929196883Spjd return NULL; 930105197Ssam 931105197Ssam /* search valid state */ 932128856Ssam for (stateidx = 0; stateidx < arraysize; stateidx++) { 933128856Ssam sav = key_do_allocsa_policy(sah, state_valid[stateidx]); 934105197Ssam if (sav != NULL) 935105197Ssam return sav; 936105197Ssam } 937105197Ssam 938105197Ssam return NULL; 939128856Ssam#undef N 940105197Ssam} 941105197Ssam 942105197Ssam/* 943105197Ssam * searching SAD with direction, protocol, mode and state. 944105197Ssam * called by key_allocsa_policy(). 945105197Ssam * OUT: 946105197Ssam * NULL : not found 947105197Ssam * others : found, pointer to a SA. 948105197Ssam */ 949105197Ssamstatic struct secasvar * 950105197Ssamkey_do_allocsa_policy(struct secashead *sah, u_int state) 951105197Ssam{ 952105197Ssam struct secasvar *sav, *nextsav, *candidate, *d; 953105197Ssam 954105197Ssam /* initilize */ 955105197Ssam candidate = NULL; 956105197Ssam 957120585Ssam SAHTREE_LOCK(); 958105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 959105197Ssam sav != NULL; 960105197Ssam sav = nextsav) { 961105197Ssam 962105197Ssam nextsav = LIST_NEXT(sav, chain); 963105197Ssam 964105197Ssam /* sanity check */ 965120585Ssam KEY_CHKSASTATE(sav->state, state, __func__); 966105197Ssam 967105197Ssam /* initialize */ 968105197Ssam if (candidate == NULL) { 969105197Ssam candidate = sav; 970105197Ssam continue; 971105197Ssam } 972105197Ssam 973105197Ssam /* Which SA is the better ? */ 974105197Ssam 975120585Ssam IPSEC_ASSERT(candidate->lft_c != NULL, 976120585Ssam ("null candidate lifetime")); 977120585Ssam IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime")); 978105197Ssam 979105197Ssam /* What the best method is to compare ? */ 980181803Sbz if (V_key_preferred_oldsa) { 981157123Sgnn if (candidate->lft_c->addtime > 982157123Sgnn sav->lft_c->addtime) { 983105197Ssam candidate = sav; 984105197Ssam } 985105197Ssam continue; 986105197Ssam /*NOTREACHED*/ 987105197Ssam } 988105197Ssam 989125876Sguido /* preferred new sa rather than old sa */ 990157123Sgnn if (candidate->lft_c->addtime < 991157123Sgnn sav->lft_c->addtime) { 992105197Ssam d = candidate; 993105197Ssam candidate = sav; 994105197Ssam } else 995105197Ssam d = sav; 996105197Ssam 997105197Ssam /* 998105197Ssam * prepared to delete the SA when there is more 999105197Ssam * suitable candidate and the lifetime of the SA is not 1000105197Ssam * permanent. 1001105197Ssam */ 1002177553Sbz if (d->lft_h->addtime != 0) { 1003105197Ssam struct mbuf *m, *result; 1004125508Ssam u_int8_t satype; 1005105197Ssam 1006105197Ssam key_sa_chgstate(d, SADB_SASTATE_DEAD); 1007105197Ssam 1008120585Ssam IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count")); 1009125508Ssam 1010125508Ssam satype = key_proto2satype(d->sah->saidx.proto); 1011125508Ssam if (satype == 0) 1012125508Ssam goto msgfail; 1013125508Ssam 1014105197Ssam m = key_setsadbmsg(SADB_DELETE, 0, 1015125508Ssam satype, 0, 0, d->refcnt - 1); 1016105197Ssam if (!m) 1017105197Ssam goto msgfail; 1018105197Ssam result = m; 1019105197Ssam 1020105197Ssam /* set sadb_address for saidx's. */ 1021105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 1022105197Ssam &d->sah->saidx.src.sa, 1023105197Ssam d->sah->saidx.src.sa.sa_len << 3, 1024105197Ssam IPSEC_ULPROTO_ANY); 1025105197Ssam if (!m) 1026105197Ssam goto msgfail; 1027105197Ssam m_cat(result, m); 1028105197Ssam 1029105197Ssam /* set sadb_address for saidx's. */ 1030105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 1031128860Ssam &d->sah->saidx.dst.sa, 1032128860Ssam d->sah->saidx.dst.sa.sa_len << 3, 1033105197Ssam IPSEC_ULPROTO_ANY); 1034105197Ssam if (!m) 1035105197Ssam goto msgfail; 1036105197Ssam m_cat(result, m); 1037105197Ssam 1038105197Ssam /* create SA extension */ 1039105197Ssam m = key_setsadbsa(d); 1040105197Ssam if (!m) 1041105197Ssam goto msgfail; 1042105197Ssam m_cat(result, m); 1043105197Ssam 1044105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 1045105197Ssam result = m_pullup(result, 1046105197Ssam sizeof(struct sadb_msg)); 1047105197Ssam if (result == NULL) 1048105197Ssam goto msgfail; 1049105197Ssam } 1050105197Ssam 1051105197Ssam result->m_pkthdr.len = 0; 1052105197Ssam for (m = result; m; m = m->m_next) 1053105197Ssam result->m_pkthdr.len += m->m_len; 1054105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 1055105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 1056105197Ssam 1057105197Ssam if (key_sendup_mbuf(NULL, result, 1058105197Ssam KEY_SENDUP_REGISTERED)) 1059105197Ssam goto msgfail; 1060105197Ssam msgfail: 1061105197Ssam KEY_FREESAV(&d); 1062105197Ssam } 1063105197Ssam } 1064105197Ssam if (candidate) { 1065158767Spjd sa_addref(candidate); 1066105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1067120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 1068120585Ssam __func__, candidate->refcnt, candidate)); 1069105197Ssam } 1070120585Ssam SAHTREE_UNLOCK(); 1071119643Ssam 1072105197Ssam return candidate; 1073105197Ssam} 1074105197Ssam 1075105197Ssam/* 1076105197Ssam * allocating a usable SA entry for a *INBOUND* packet. 1077105197Ssam * Must call key_freesav() later. 1078105197Ssam * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1079105197Ssam * NULL: not found, or error occured. 1080105197Ssam * 1081105197Ssam * In the comparison, no source address is used--for RFC2401 conformance. 1082105197Ssam * To quote, from section 4.1: 1083105197Ssam * A security association is uniquely identified by a triple consisting 1084105197Ssam * of a Security Parameter Index (SPI), an IP Destination Address, and a 1085105197Ssam * security protocol (AH or ESP) identifier. 1086105197Ssam * Note that, however, we do need to keep source address in IPsec SA. 1087105197Ssam * IKE specification and PF_KEY specification do assume that we 1088105197Ssam * keep source address in IPsec SA. We see a tricky situation here. 1089105197Ssam */ 1090105197Ssamstruct secasvar * 1091105197Ssamkey_allocsa( 1092105197Ssam union sockaddr_union *dst, 1093105197Ssam u_int proto, 1094105197Ssam u_int32_t spi, 1095105197Ssam const char* where, int tag) 1096105197Ssam{ 1097105197Ssam struct secashead *sah; 1098105197Ssam struct secasvar *sav; 1099128856Ssam u_int stateidx, arraysize, state; 1100128856Ssam const u_int *saorder_state_valid; 1101194062Svanhu int chkport; 1102105197Ssam 1103120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst address")); 1104105197Ssam 1105105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1106120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 1107105197Ssam 1108194062Svanhu#ifdef IPSEC_NAT_T 1109194062Svanhu chkport = (dst->sa.sa_family == AF_INET && 1110194062Svanhu dst->sa.sa_len == sizeof(struct sockaddr_in) && 1111194062Svanhu dst->sin.sin_port != 0); 1112194062Svanhu#else 1113194062Svanhu chkport = 0; 1114194062Svanhu#endif 1115194062Svanhu 1116105197Ssam /* 1117105197Ssam * searching SAD. 1118105197Ssam * XXX: to be checked internal IP header somewhere. Also when 1119105197Ssam * IPsec tunnel packet is received. But ESP tunnel mode is 1120105197Ssam * encrypted so we can't check internal IP header. 1121105197Ssam */ 1122120585Ssam SAHTREE_LOCK(); 1123181803Sbz if (V_key_preferred_oldsa) { 1124128856Ssam saorder_state_valid = saorder_state_valid_prefer_old; 1125128856Ssam arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1126128856Ssam } else { 1127128856Ssam saorder_state_valid = saorder_state_valid_prefer_new; 1128128856Ssam arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1129128856Ssam } 1130181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 1131105197Ssam /* search valid state */ 1132128856Ssam for (stateidx = 0; stateidx < arraysize; stateidx++) { 1133105197Ssam state = saorder_state_valid[stateidx]; 1134105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 1135105197Ssam /* sanity check */ 1136120585Ssam KEY_CHKSASTATE(sav->state, state, __func__); 1137105197Ssam /* do not return entries w/ unusable state */ 1138105197Ssam if (sav->state != SADB_SASTATE_MATURE && 1139105197Ssam sav->state != SADB_SASTATE_DYING) 1140105197Ssam continue; 1141105197Ssam if (proto != sav->sah->saidx.proto) 1142105197Ssam continue; 1143105197Ssam if (spi != sav->spi) 1144105197Ssam continue; 1145105197Ssam#if 0 /* don't check src */ 1146105197Ssam /* check src address */ 1147194062Svanhu if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, chkport) != 0) 1148105197Ssam continue; 1149105197Ssam#endif 1150105197Ssam /* check dst address */ 1151194062Svanhu if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0) 1152105197Ssam continue; 1153158767Spjd sa_addref(sav); 1154105197Ssam goto done; 1155105197Ssam } 1156105197Ssam } 1157105197Ssam } 1158105197Ssam sav = NULL; 1159105197Ssamdone: 1160120585Ssam SAHTREE_UNLOCK(); 1161105197Ssam 1162105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1163120585Ssam printf("DP %s return SA:%p; refcnt %u\n", __func__, 1164105197Ssam sav, sav ? sav->refcnt : 0)); 1165105197Ssam return sav; 1166105197Ssam} 1167105197Ssam 1168105197Ssam/* 1169105197Ssam * Must be called after calling key_allocsp(). 1170105197Ssam * For both the packet without socket and key_freeso(). 1171105197Ssam */ 1172105197Ssamvoid 1173105197Ssam_key_freesp(struct secpolicy **spp, const char* where, int tag) 1174105197Ssam{ 1175105197Ssam struct secpolicy *sp = *spp; 1176105197Ssam 1177120585Ssam IPSEC_ASSERT(sp != NULL, ("null sp")); 1178105197Ssam 1179120585Ssam SPTREE_LOCK(); 1180105197Ssam SP_DELREF(sp); 1181105197Ssam 1182105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1183120585Ssam printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n", 1184120585Ssam __func__, sp, sp->id, where, tag, sp->refcnt)); 1185105197Ssam 1186105197Ssam if (sp->refcnt == 0) { 1187105197Ssam *spp = NULL; 1188105197Ssam key_delsp(sp); 1189105197Ssam } 1190120585Ssam SPTREE_UNLOCK(); 1191105197Ssam} 1192105197Ssam 1193105197Ssam/* 1194105197Ssam * Must be called after calling key_allocsp(). 1195105197Ssam * For the packet with socket. 1196105197Ssam */ 1197105197Ssamvoid 1198105197Ssamkey_freeso(struct socket *so) 1199105197Ssam{ 1200120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 1201105197Ssam 1202105197Ssam switch (so->so_proto->pr_domain->dom_family) { 1203186141Sbz#if defined(INET) || defined(INET6) 1204105197Ssam#ifdef INET 1205105197Ssam case PF_INET: 1206105197Ssam#endif 1207105197Ssam#ifdef INET6 1208105197Ssam case PF_INET6: 1209186141Sbz#endif 1210105197Ssam { 1211186141Sbz struct inpcb *pcb = sotoinpcb(so); 1212105197Ssam 1213105197Ssam /* Does it have a PCB ? */ 1214105197Ssam if (pcb == NULL) 1215105197Ssam return; 1216105197Ssam key_freesp_so(&pcb->inp_sp->sp_in); 1217105197Ssam key_freesp_so(&pcb->inp_sp->sp_out); 1218105197Ssam } 1219105197Ssam break; 1220186141Sbz#endif /* INET || INET6 */ 1221105197Ssam default: 1222120585Ssam ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n", 1223120585Ssam __func__, so->so_proto->pr_domain->dom_family)); 1224105197Ssam return; 1225105197Ssam } 1226105197Ssam} 1227105197Ssam 1228105197Ssamstatic void 1229105197Ssamkey_freesp_so(struct secpolicy **sp) 1230105197Ssam{ 1231120585Ssam IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp")); 1232105197Ssam 1233105197Ssam if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1234105197Ssam (*sp)->policy == IPSEC_POLICY_BYPASS) 1235105197Ssam return; 1236105197Ssam 1237120585Ssam IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC, 1238120585Ssam ("invalid policy %u", (*sp)->policy)); 1239105197Ssam KEY_FREESP(sp); 1240105197Ssam} 1241105197Ssam 1242105197Ssam/* 1243105197Ssam * Must be called after calling key_allocsa(). 1244105197Ssam * This function is called by key_freesp() to free some SA allocated 1245105197Ssam * for a policy. 1246105197Ssam */ 1247105197Ssamvoid 1248105197Ssamkey_freesav(struct secasvar **psav, const char* where, int tag) 1249105197Ssam{ 1250105197Ssam struct secasvar *sav = *psav; 1251105197Ssam 1252120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 1253105197Ssam 1254158767Spjd if (sa_delref(sav)) { 1255158767Spjd KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1256158767Spjd printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1257158767Spjd __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1258105197Ssam *psav = NULL; 1259105197Ssam key_delsav(sav); 1260158767Spjd } else { 1261158767Spjd KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1262158767Spjd printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n", 1263158767Spjd __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt)); 1264105197Ssam } 1265105197Ssam} 1266105197Ssam 1267105197Ssam/* %%% SPD management */ 1268105197Ssam/* 1269105197Ssam * free security policy entry. 1270105197Ssam */ 1271105197Ssamstatic void 1272105197Ssamkey_delsp(struct secpolicy *sp) 1273105197Ssam{ 1274119643Ssam struct ipsecrequest *isr, *nextisr; 1275105197Ssam 1276120585Ssam IPSEC_ASSERT(sp != NULL, ("null sp")); 1277120585Ssam SPTREE_LOCK_ASSERT(); 1278105197Ssam 1279105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 1280105197Ssam 1281120585Ssam IPSEC_ASSERT(sp->refcnt == 0, 1282120585Ssam ("SP with references deleted (refcnt %u)", sp->refcnt)); 1283105197Ssam 1284105197Ssam /* remove from SP index */ 1285105197Ssam if (__LIST_CHAINED(sp)) 1286105197Ssam LIST_REMOVE(sp, chain); 1287105197Ssam 1288119643Ssam for (isr = sp->req; isr != NULL; isr = nextisr) { 1289105197Ssam if (isr->sav != NULL) { 1290105197Ssam KEY_FREESAV(&isr->sav); 1291105197Ssam isr->sav = NULL; 1292105197Ssam } 1293105197Ssam 1294105197Ssam nextisr = isr->next; 1295119643Ssam ipsec_delisr(isr); 1296105197Ssam } 1297119643Ssam _key_delsp(sp); 1298105197Ssam} 1299105197Ssam 1300105197Ssam/* 1301105197Ssam * search SPD 1302105197Ssam * OUT: NULL : not found 1303105197Ssam * others : found, pointer to a SP. 1304105197Ssam */ 1305105197Ssamstatic struct secpolicy * 1306105197Ssamkey_getsp(struct secpolicyindex *spidx) 1307105197Ssam{ 1308105197Ssam struct secpolicy *sp; 1309105197Ssam 1310120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 1311105197Ssam 1312120585Ssam SPTREE_LOCK(); 1313181803Sbz LIST_FOREACH(sp, &V_sptree[spidx->dir], chain) { 1314105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1315105197Ssam continue; 1316105197Ssam if (key_cmpspidx_exactly(spidx, &sp->spidx)) { 1317105197Ssam SP_ADDREF(sp); 1318119643Ssam break; 1319105197Ssam } 1320105197Ssam } 1321120585Ssam SPTREE_UNLOCK(); 1322105197Ssam 1323119643Ssam return sp; 1324105197Ssam} 1325105197Ssam 1326105197Ssam/* 1327105197Ssam * get SP by index. 1328105197Ssam * OUT: NULL : not found 1329105197Ssam * others : found, pointer to a SP. 1330105197Ssam */ 1331105197Ssamstatic struct secpolicy * 1332105197Ssamkey_getspbyid(u_int32_t id) 1333105197Ssam{ 1334105197Ssam struct secpolicy *sp; 1335105197Ssam 1336120585Ssam SPTREE_LOCK(); 1337181803Sbz LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) { 1338105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1339105197Ssam continue; 1340105197Ssam if (sp->id == id) { 1341105197Ssam SP_ADDREF(sp); 1342119643Ssam goto done; 1343105197Ssam } 1344105197Ssam } 1345105197Ssam 1346181803Sbz LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) { 1347105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 1348105197Ssam continue; 1349105197Ssam if (sp->id == id) { 1350105197Ssam SP_ADDREF(sp); 1351119643Ssam goto done; 1352105197Ssam } 1353105197Ssam } 1354119643Ssamdone: 1355120585Ssam SPTREE_UNLOCK(); 1356105197Ssam 1357119643Ssam return sp; 1358105197Ssam} 1359105197Ssam 1360105197Ssamstruct secpolicy * 1361105197Ssamkey_newsp(const char* where, int tag) 1362105197Ssam{ 1363105197Ssam struct secpolicy *newsp = NULL; 1364105197Ssam 1365105197Ssam newsp = (struct secpolicy *) 1366119643Ssam malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO); 1367105197Ssam if (newsp) { 1368120585Ssam SECPOLICY_LOCK_INIT(newsp); 1369105197Ssam newsp->refcnt = 1; 1370105197Ssam newsp->req = NULL; 1371105197Ssam } 1372105197Ssam 1373105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 1374120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 1375105197Ssam where, tag, newsp)); 1376105197Ssam return newsp; 1377105197Ssam} 1378105197Ssam 1379119643Ssamstatic void 1380119643Ssam_key_delsp(struct secpolicy *sp) 1381119643Ssam{ 1382120585Ssam SECPOLICY_LOCK_DESTROY(sp); 1383119643Ssam free(sp, M_IPSEC_SP); 1384119643Ssam} 1385119643Ssam 1386105197Ssam/* 1387105197Ssam * create secpolicy structure from sadb_x_policy structure. 1388105197Ssam * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1389105197Ssam * so must be set properly later. 1390105197Ssam */ 1391105197Ssamstruct secpolicy * 1392105197Ssamkey_msg2sp(xpl0, len, error) 1393105197Ssam struct sadb_x_policy *xpl0; 1394105197Ssam size_t len; 1395105197Ssam int *error; 1396105197Ssam{ 1397105197Ssam struct secpolicy *newsp; 1398105197Ssam 1399120585Ssam IPSEC_ASSERT(xpl0 != NULL, ("null xpl0")); 1400127972Spjd IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len)); 1401120585Ssam 1402105197Ssam if (len != PFKEY_EXTLEN(xpl0)) { 1403120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__)); 1404105197Ssam *error = EINVAL; 1405105197Ssam return NULL; 1406105197Ssam } 1407105197Ssam 1408105197Ssam if ((newsp = KEY_NEWSP()) == NULL) { 1409105197Ssam *error = ENOBUFS; 1410105197Ssam return NULL; 1411105197Ssam } 1412105197Ssam 1413105197Ssam newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1414105197Ssam newsp->policy = xpl0->sadb_x_policy_type; 1415105197Ssam 1416105197Ssam /* check policy */ 1417105197Ssam switch (xpl0->sadb_x_policy_type) { 1418105197Ssam case IPSEC_POLICY_DISCARD: 1419105197Ssam case IPSEC_POLICY_NONE: 1420105197Ssam case IPSEC_POLICY_ENTRUST: 1421105197Ssam case IPSEC_POLICY_BYPASS: 1422105197Ssam newsp->req = NULL; 1423105197Ssam break; 1424105197Ssam 1425105197Ssam case IPSEC_POLICY_IPSEC: 1426105197Ssam { 1427105197Ssam int tlen; 1428105197Ssam struct sadb_x_ipsecrequest *xisr; 1429105197Ssam struct ipsecrequest **p_isr = &newsp->req; 1430105197Ssam 1431105197Ssam /* validity check */ 1432105197Ssam if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1433120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", 1434120585Ssam __func__)); 1435105197Ssam KEY_FREESP(&newsp); 1436105197Ssam *error = EINVAL; 1437105197Ssam return NULL; 1438105197Ssam } 1439105197Ssam 1440105197Ssam tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1441105197Ssam xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1); 1442105197Ssam 1443105197Ssam while (tlen > 0) { 1444105197Ssam /* length check */ 1445105197Ssam if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1446120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest " 1447120585Ssam "length.\n", __func__)); 1448105197Ssam KEY_FREESP(&newsp); 1449105197Ssam *error = EINVAL; 1450105197Ssam return NULL; 1451105197Ssam } 1452105197Ssam 1453105197Ssam /* allocate request buffer */ 1454119643Ssam /* NB: data structure is zero'd */ 1455119643Ssam *p_isr = ipsec_newisr(); 1456105197Ssam if ((*p_isr) == NULL) { 1457105197Ssam ipseclog((LOG_DEBUG, 1458120585Ssam "%s: No more memory.\n", __func__)); 1459105197Ssam KEY_FREESP(&newsp); 1460105197Ssam *error = ENOBUFS; 1461105197Ssam return NULL; 1462105197Ssam } 1463105197Ssam 1464105197Ssam /* set values */ 1465105197Ssam switch (xisr->sadb_x_ipsecrequest_proto) { 1466105197Ssam case IPPROTO_ESP: 1467105197Ssam case IPPROTO_AH: 1468105197Ssam case IPPROTO_IPCOMP: 1469105197Ssam break; 1470105197Ssam default: 1471105197Ssam ipseclog((LOG_DEBUG, 1472120585Ssam "%s: invalid proto type=%u\n", __func__, 1473105197Ssam xisr->sadb_x_ipsecrequest_proto)); 1474105197Ssam KEY_FREESP(&newsp); 1475105197Ssam *error = EPROTONOSUPPORT; 1476105197Ssam return NULL; 1477105197Ssam } 1478105197Ssam (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1479105197Ssam 1480105197Ssam switch (xisr->sadb_x_ipsecrequest_mode) { 1481105197Ssam case IPSEC_MODE_TRANSPORT: 1482105197Ssam case IPSEC_MODE_TUNNEL: 1483105197Ssam break; 1484105197Ssam case IPSEC_MODE_ANY: 1485105197Ssam default: 1486105197Ssam ipseclog((LOG_DEBUG, 1487120585Ssam "%s: invalid mode=%u\n", __func__, 1488105197Ssam xisr->sadb_x_ipsecrequest_mode)); 1489105197Ssam KEY_FREESP(&newsp); 1490105197Ssam *error = EINVAL; 1491105197Ssam return NULL; 1492105197Ssam } 1493105197Ssam (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1494105197Ssam 1495105197Ssam switch (xisr->sadb_x_ipsecrequest_level) { 1496105197Ssam case IPSEC_LEVEL_DEFAULT: 1497105197Ssam case IPSEC_LEVEL_USE: 1498105197Ssam case IPSEC_LEVEL_REQUIRE: 1499105197Ssam break; 1500105197Ssam case IPSEC_LEVEL_UNIQUE: 1501105197Ssam /* validity check */ 1502105197Ssam /* 1503105197Ssam * If range violation of reqid, kernel will 1504105197Ssam * update it, don't refuse it. 1505105197Ssam */ 1506105197Ssam if (xisr->sadb_x_ipsecrequest_reqid 1507105197Ssam > IPSEC_MANUAL_REQID_MAX) { 1508105197Ssam ipseclog((LOG_DEBUG, 1509120585Ssam "%s: reqid=%d range " 1510105197Ssam "violation, updated by kernel.\n", 1511120585Ssam __func__, 1512105197Ssam xisr->sadb_x_ipsecrequest_reqid)); 1513105197Ssam xisr->sadb_x_ipsecrequest_reqid = 0; 1514105197Ssam } 1515105197Ssam 1516105197Ssam /* allocate new reqid id if reqid is zero. */ 1517105197Ssam if (xisr->sadb_x_ipsecrequest_reqid == 0) { 1518105197Ssam u_int32_t reqid; 1519105197Ssam if ((reqid = key_newreqid()) == 0) { 1520105197Ssam KEY_FREESP(&newsp); 1521105197Ssam *error = ENOBUFS; 1522105197Ssam return NULL; 1523105197Ssam } 1524105197Ssam (*p_isr)->saidx.reqid = reqid; 1525105197Ssam xisr->sadb_x_ipsecrequest_reqid = reqid; 1526105197Ssam } else { 1527105197Ssam /* set it for manual keying. */ 1528105197Ssam (*p_isr)->saidx.reqid = 1529105197Ssam xisr->sadb_x_ipsecrequest_reqid; 1530105197Ssam } 1531105197Ssam break; 1532105197Ssam 1533105197Ssam default: 1534120585Ssam ipseclog((LOG_DEBUG, "%s: invalid level=%u\n", 1535120585Ssam __func__, 1536105197Ssam xisr->sadb_x_ipsecrequest_level)); 1537105197Ssam KEY_FREESP(&newsp); 1538105197Ssam *error = EINVAL; 1539105197Ssam return NULL; 1540105197Ssam } 1541105197Ssam (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1542105197Ssam 1543105197Ssam /* set IP addresses if there */ 1544105197Ssam if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1545105197Ssam struct sockaddr *paddr; 1546105197Ssam 1547105197Ssam paddr = (struct sockaddr *)(xisr + 1); 1548105197Ssam 1549105197Ssam /* validity check */ 1550105197Ssam if (paddr->sa_len 1551105197Ssam > sizeof((*p_isr)->saidx.src)) { 1552120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 1553120585Ssam "request address length.\n", 1554120585Ssam __func__)); 1555105197Ssam KEY_FREESP(&newsp); 1556105197Ssam *error = EINVAL; 1557105197Ssam return NULL; 1558105197Ssam } 1559105197Ssam bcopy(paddr, &(*p_isr)->saidx.src, 1560105197Ssam paddr->sa_len); 1561105197Ssam 1562105197Ssam paddr = (struct sockaddr *)((caddr_t)paddr 1563105197Ssam + paddr->sa_len); 1564105197Ssam 1565105197Ssam /* validity check */ 1566105197Ssam if (paddr->sa_len 1567105197Ssam > sizeof((*p_isr)->saidx.dst)) { 1568120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 1569120585Ssam "request address length.\n", 1570120585Ssam __func__)); 1571105197Ssam KEY_FREESP(&newsp); 1572105197Ssam *error = EINVAL; 1573105197Ssam return NULL; 1574105197Ssam } 1575105197Ssam bcopy(paddr, &(*p_isr)->saidx.dst, 1576105197Ssam paddr->sa_len); 1577105197Ssam } 1578105197Ssam 1579105197Ssam (*p_isr)->sp = newsp; 1580105197Ssam 1581105197Ssam /* initialization for the next. */ 1582105197Ssam p_isr = &(*p_isr)->next; 1583105197Ssam tlen -= xisr->sadb_x_ipsecrequest_len; 1584105197Ssam 1585105197Ssam /* validity check */ 1586105197Ssam if (tlen < 0) { 1587120585Ssam ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n", 1588120585Ssam __func__)); 1589105197Ssam KEY_FREESP(&newsp); 1590105197Ssam *error = EINVAL; 1591105197Ssam return NULL; 1592105197Ssam } 1593105197Ssam 1594105197Ssam xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr 1595105197Ssam + xisr->sadb_x_ipsecrequest_len); 1596105197Ssam } 1597105197Ssam } 1598105197Ssam break; 1599105197Ssam default: 1600120585Ssam ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__)); 1601105197Ssam KEY_FREESP(&newsp); 1602105197Ssam *error = EINVAL; 1603105197Ssam return NULL; 1604105197Ssam } 1605105197Ssam 1606105197Ssam *error = 0; 1607105197Ssam return newsp; 1608105197Ssam} 1609105197Ssam 1610105197Ssamstatic u_int32_t 1611105197Ssamkey_newreqid() 1612105197Ssam{ 1613105197Ssam static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1614105197Ssam 1615105197Ssam auto_reqid = (auto_reqid == ~0 1616105197Ssam ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1617105197Ssam 1618105197Ssam /* XXX should be unique check */ 1619105197Ssam 1620105197Ssam return auto_reqid; 1621105197Ssam} 1622105197Ssam 1623105197Ssam/* 1624105197Ssam * copy secpolicy struct to sadb_x_policy structure indicated. 1625105197Ssam */ 1626105197Ssamstruct mbuf * 1627105197Ssamkey_sp2msg(sp) 1628105197Ssam struct secpolicy *sp; 1629105197Ssam{ 1630105197Ssam struct sadb_x_policy *xpl; 1631105197Ssam int tlen; 1632105197Ssam caddr_t p; 1633105197Ssam struct mbuf *m; 1634105197Ssam 1635120585Ssam IPSEC_ASSERT(sp != NULL, ("null policy")); 1636105197Ssam 1637105197Ssam tlen = key_getspreqmsglen(sp); 1638105197Ssam 1639105197Ssam m = key_alloc_mbuf(tlen); 1640105197Ssam if (!m || m->m_next) { /*XXX*/ 1641105197Ssam if (m) 1642105197Ssam m_freem(m); 1643105197Ssam return NULL; 1644105197Ssam } 1645105197Ssam 1646105197Ssam m->m_len = tlen; 1647105197Ssam m->m_next = NULL; 1648105197Ssam xpl = mtod(m, struct sadb_x_policy *); 1649105197Ssam bzero(xpl, tlen); 1650105197Ssam 1651105197Ssam xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1652105197Ssam xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1653105197Ssam xpl->sadb_x_policy_type = sp->policy; 1654105197Ssam xpl->sadb_x_policy_dir = sp->spidx.dir; 1655105197Ssam xpl->sadb_x_policy_id = sp->id; 1656105197Ssam p = (caddr_t)xpl + sizeof(*xpl); 1657105197Ssam 1658105197Ssam /* if is the policy for ipsec ? */ 1659105197Ssam if (sp->policy == IPSEC_POLICY_IPSEC) { 1660105197Ssam struct sadb_x_ipsecrequest *xisr; 1661105197Ssam struct ipsecrequest *isr; 1662105197Ssam 1663105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 1664105197Ssam 1665105197Ssam xisr = (struct sadb_x_ipsecrequest *)p; 1666105197Ssam 1667105197Ssam xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1668105197Ssam xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1669105197Ssam xisr->sadb_x_ipsecrequest_level = isr->level; 1670105197Ssam xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1671105197Ssam 1672105197Ssam p += sizeof(*xisr); 1673105197Ssam bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len); 1674105197Ssam p += isr->saidx.src.sa.sa_len; 1675105197Ssam bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len); 1676105197Ssam p += isr->saidx.src.sa.sa_len; 1677105197Ssam 1678105197Ssam xisr->sadb_x_ipsecrequest_len = 1679105197Ssam PFKEY_ALIGN8(sizeof(*xisr) 1680105197Ssam + isr->saidx.src.sa.sa_len 1681105197Ssam + isr->saidx.dst.sa.sa_len); 1682105197Ssam } 1683105197Ssam } 1684105197Ssam 1685105197Ssam return m; 1686105197Ssam} 1687105197Ssam 1688105197Ssam/* m will not be freed nor modified */ 1689105197Ssamstatic struct mbuf * 1690105197Ssam#ifdef __STDC__ 1691105197Ssamkey_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1692105197Ssam int ndeep, int nitem, ...) 1693105197Ssam#else 1694105197Ssamkey_gather_mbuf(m, mhp, ndeep, nitem, va_alist) 1695105197Ssam struct mbuf *m; 1696105197Ssam const struct sadb_msghdr *mhp; 1697105197Ssam int ndeep; 1698105197Ssam int nitem; 1699105197Ssam va_dcl 1700105197Ssam#endif 1701105197Ssam{ 1702105197Ssam va_list ap; 1703105197Ssam int idx; 1704105197Ssam int i; 1705105197Ssam struct mbuf *result = NULL, *n; 1706105197Ssam int len; 1707105197Ssam 1708120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1709120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1710105197Ssam 1711105197Ssam va_start(ap, nitem); 1712105197Ssam for (i = 0; i < nitem; i++) { 1713105197Ssam idx = va_arg(ap, int); 1714105197Ssam if (idx < 0 || idx > SADB_EXT_MAX) 1715105197Ssam goto fail; 1716105197Ssam /* don't attempt to pull empty extension */ 1717105197Ssam if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1718105197Ssam continue; 1719105197Ssam if (idx != SADB_EXT_RESERVED && 1720105197Ssam (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1721105197Ssam continue; 1722105197Ssam 1723105197Ssam if (idx == SADB_EXT_RESERVED) { 1724105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1725120585Ssam 1726120585Ssam IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len)); 1727120585Ssam 1728111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 1729105197Ssam if (!n) 1730105197Ssam goto fail; 1731105197Ssam n->m_len = len; 1732105197Ssam n->m_next = NULL; 1733105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), 1734105197Ssam mtod(n, caddr_t)); 1735105197Ssam } else if (i < ndeep) { 1736105197Ssam len = mhp->extlen[idx]; 1737105197Ssam n = key_alloc_mbuf(len); 1738105197Ssam if (!n || n->m_next) { /*XXX*/ 1739105197Ssam if (n) 1740105197Ssam m_freem(n); 1741105197Ssam goto fail; 1742105197Ssam } 1743105197Ssam m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1744105197Ssam mtod(n, caddr_t)); 1745105197Ssam } else { 1746105197Ssam n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1747111119Simp M_DONTWAIT); 1748105197Ssam } 1749105197Ssam if (n == NULL) 1750105197Ssam goto fail; 1751105197Ssam 1752105197Ssam if (result) 1753105197Ssam m_cat(result, n); 1754105197Ssam else 1755105197Ssam result = n; 1756105197Ssam } 1757105197Ssam va_end(ap); 1758105197Ssam 1759105197Ssam if ((result->m_flags & M_PKTHDR) != 0) { 1760105197Ssam result->m_pkthdr.len = 0; 1761105197Ssam for (n = result; n; n = n->m_next) 1762105197Ssam result->m_pkthdr.len += n->m_len; 1763105197Ssam } 1764105197Ssam 1765105197Ssam return result; 1766105197Ssam 1767105197Ssamfail: 1768105197Ssam m_freem(result); 1769105197Ssam return NULL; 1770105197Ssam} 1771105197Ssam 1772105197Ssam/* 1773105197Ssam * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1774108533Sschweikh * add an entry to SP database, when received 1775105197Ssam * <base, address(SD), (lifetime(H),) policy> 1776105197Ssam * from the user(?). 1777105197Ssam * Adding to SP database, 1778105197Ssam * and send 1779105197Ssam * <base, address(SD), (lifetime(H),) policy> 1780105197Ssam * to the socket which was send. 1781105197Ssam * 1782105197Ssam * SPDADD set a unique policy entry. 1783105197Ssam * SPDSETIDX like SPDADD without a part of policy requests. 1784105197Ssam * SPDUPDATE replace a unique policy entry. 1785105197Ssam * 1786105197Ssam * m will always be freed. 1787105197Ssam */ 1788105197Ssamstatic int 1789105197Ssamkey_spdadd(so, m, mhp) 1790105197Ssam struct socket *so; 1791105197Ssam struct mbuf *m; 1792105197Ssam const struct sadb_msghdr *mhp; 1793105197Ssam{ 1794105197Ssam struct sadb_address *src0, *dst0; 1795105197Ssam struct sadb_x_policy *xpl0, *xpl; 1796105197Ssam struct sadb_lifetime *lft = NULL; 1797105197Ssam struct secpolicyindex spidx; 1798105197Ssam struct secpolicy *newsp; 1799105197Ssam int error; 1800105197Ssam 1801120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 1802120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 1803120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 1804120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 1805105197Ssam 1806105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1807105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1808105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1809105197Ssam ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n")); 1810105197Ssam return key_senderror(so, m, EINVAL); 1811105197Ssam } 1812105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1813105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1814105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1815120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1816120585Ssam __func__)); 1817105197Ssam return key_senderror(so, m, EINVAL); 1818105197Ssam } 1819105197Ssam if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 1820105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] 1821105197Ssam < sizeof(struct sadb_lifetime)) { 1822120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 1823120585Ssam __func__)); 1824105197Ssam return key_senderror(so, m, EINVAL); 1825105197Ssam } 1826105197Ssam lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 1827105197Ssam } 1828105197Ssam 1829105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 1830105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 1831105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 1832105197Ssam 1833194062Svanhu /* 1834194062Svanhu * Note: do not parse SADB_X_EXT_NAT_T_* here: 1835194062Svanhu * we are processing traffic endpoints. 1836194062Svanhu */ 1837194062Svanhu 1838105197Ssam /* make secindex */ 1839105197Ssam /* XXX boundary check against sa_len */ 1840105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1841105197Ssam src0 + 1, 1842105197Ssam dst0 + 1, 1843105197Ssam src0->sadb_address_prefixlen, 1844105197Ssam dst0->sadb_address_prefixlen, 1845105197Ssam src0->sadb_address_proto, 1846105197Ssam &spidx); 1847105197Ssam 1848105197Ssam /* checking the direciton. */ 1849105197Ssam switch (xpl0->sadb_x_policy_dir) { 1850105197Ssam case IPSEC_DIR_INBOUND: 1851105197Ssam case IPSEC_DIR_OUTBOUND: 1852105197Ssam break; 1853105197Ssam default: 1854120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 1855105197Ssam mhp->msg->sadb_msg_errno = EINVAL; 1856105197Ssam return 0; 1857105197Ssam } 1858105197Ssam 1859105197Ssam /* check policy */ 1860105197Ssam /* key_spdadd() accepts DISCARD, NONE and IPSEC. */ 1861105197Ssam if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST 1862105197Ssam || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 1863120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__)); 1864105197Ssam return key_senderror(so, m, EINVAL); 1865105197Ssam } 1866105197Ssam 1867105197Ssam /* policy requests are mandatory when action is ipsec. */ 1868105197Ssam if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX 1869105197Ssam && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC 1870105197Ssam && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 1871120585Ssam ipseclog((LOG_DEBUG, "%s: some policy requests part required\n", 1872120585Ssam __func__)); 1873105197Ssam return key_senderror(so, m, EINVAL); 1874105197Ssam } 1875105197Ssam 1876105197Ssam /* 1877105197Ssam * checking there is SP already or not. 1878105197Ssam * SPDUPDATE doesn't depend on whether there is a SP or not. 1879105197Ssam * If the type is either SPDADD or SPDSETIDX AND a SP is found, 1880105197Ssam * then error. 1881105197Ssam */ 1882105197Ssam newsp = key_getsp(&spidx); 1883105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1884105197Ssam if (newsp) { 1885206659Svanhu SPTREE_LOCK(); 1886105197Ssam newsp->state = IPSEC_SPSTATE_DEAD; 1887206659Svanhu SPTREE_UNLOCK(); 1888105197Ssam KEY_FREESP(&newsp); 1889105197Ssam } 1890105197Ssam } else { 1891105197Ssam if (newsp != NULL) { 1892105197Ssam KEY_FREESP(&newsp); 1893120585Ssam ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", 1894120585Ssam __func__)); 1895105197Ssam return key_senderror(so, m, EEXIST); 1896105197Ssam } 1897105197Ssam } 1898105197Ssam 1899105197Ssam /* allocation new SP entry */ 1900105197Ssam if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1901105197Ssam return key_senderror(so, m, error); 1902105197Ssam } 1903105197Ssam 1904105197Ssam if ((newsp->id = key_getnewspid()) == 0) { 1905119643Ssam _key_delsp(newsp); 1906105197Ssam return key_senderror(so, m, ENOBUFS); 1907105197Ssam } 1908105197Ssam 1909105197Ssam /* XXX boundary check against sa_len */ 1910105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1911105197Ssam src0 + 1, 1912105197Ssam dst0 + 1, 1913105197Ssam src0->sadb_address_prefixlen, 1914105197Ssam dst0->sadb_address_prefixlen, 1915105197Ssam src0->sadb_address_proto, 1916105197Ssam &newsp->spidx); 1917105197Ssam 1918105197Ssam /* sanity check on addr pair */ 1919105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_family != 1920105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_family) { 1921119643Ssam _key_delsp(newsp); 1922105197Ssam return key_senderror(so, m, EINVAL); 1923105197Ssam } 1924105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 1925105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_len) { 1926119643Ssam _key_delsp(newsp); 1927105197Ssam return key_senderror(so, m, EINVAL); 1928105197Ssam } 1929105197Ssam#if 1 1930197250Svanhu if (newsp->req && newsp->req->saidx.src.sa.sa_family && newsp->req->saidx.dst.sa.sa_family) { 1931197250Svanhu if (newsp->req->saidx.src.sa.sa_family != newsp->req->saidx.dst.sa.sa_family) { 1932119643Ssam _key_delsp(newsp); 1933105197Ssam return key_senderror(so, m, EINVAL); 1934105197Ssam } 1935105197Ssam } 1936105197Ssam#endif 1937105197Ssam 1938105197Ssam newsp->created = time_second; 1939105197Ssam newsp->lastused = newsp->created; 1940105197Ssam newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1941105197Ssam newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1942105197Ssam 1943105197Ssam newsp->refcnt = 1; /* do not reclaim until I say I do */ 1944105197Ssam newsp->state = IPSEC_SPSTATE_ALIVE; 1945181803Sbz LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1946105197Ssam 1947105197Ssam /* delete the entry in spacqtree */ 1948105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1949119643Ssam struct secspacq *spacq = key_getspacq(&spidx); 1950119643Ssam if (spacq != NULL) { 1951105197Ssam /* reset counter in order to deletion by timehandler. */ 1952105197Ssam spacq->created = time_second; 1953105197Ssam spacq->count = 0; 1954120585Ssam SPACQ_UNLOCK(); 1955105197Ssam } 1956105197Ssam } 1957105197Ssam 1958105197Ssam { 1959105197Ssam struct mbuf *n, *mpolicy; 1960105197Ssam struct sadb_msg *newmsg; 1961105197Ssam int off; 1962105197Ssam 1963194062Svanhu /* 1964194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 1965194062Svanhu * we are sending traffic endpoints. 1966194062Svanhu */ 1967194062Svanhu 1968105197Ssam /* create new sadb_msg to reply. */ 1969105197Ssam if (lft) { 1970105197Ssam n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1971105197Ssam SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1972105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1973105197Ssam } else { 1974105197Ssam n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1975105197Ssam SADB_X_EXT_POLICY, 1976105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1977105197Ssam } 1978105197Ssam if (!n) 1979105197Ssam return key_senderror(so, m, ENOBUFS); 1980105197Ssam 1981105197Ssam if (n->m_len < sizeof(*newmsg)) { 1982105197Ssam n = m_pullup(n, sizeof(*newmsg)); 1983105197Ssam if (!n) 1984105197Ssam return key_senderror(so, m, ENOBUFS); 1985105197Ssam } 1986105197Ssam newmsg = mtod(n, struct sadb_msg *); 1987105197Ssam newmsg->sadb_msg_errno = 0; 1988105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1989105197Ssam 1990105197Ssam off = 0; 1991105197Ssam mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 1992105197Ssam sizeof(*xpl), &off); 1993105197Ssam if (mpolicy == NULL) { 1994105197Ssam /* n is already freed */ 1995105197Ssam return key_senderror(so, m, ENOBUFS); 1996105197Ssam } 1997105197Ssam xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 1998105197Ssam if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 1999105197Ssam m_freem(n); 2000105197Ssam return key_senderror(so, m, EINVAL); 2001105197Ssam } 2002105197Ssam xpl->sadb_x_policy_id = newsp->id; 2003105197Ssam 2004105197Ssam m_freem(m); 2005105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2006105197Ssam } 2007105197Ssam} 2008105197Ssam 2009105197Ssam/* 2010105197Ssam * get new policy id. 2011105197Ssam * OUT: 2012105197Ssam * 0: failure. 2013105197Ssam * others: success. 2014105197Ssam */ 2015105197Ssamstatic u_int32_t 2016105197Ssamkey_getnewspid() 2017105197Ssam{ 2018105197Ssam u_int32_t newid = 0; 2019181803Sbz int count = V_key_spi_trycnt; /* XXX */ 2020105197Ssam struct secpolicy *sp; 2021105197Ssam 2022105197Ssam /* when requesting to allocate spi ranged */ 2023105197Ssam while (count--) { 2024181803Sbz newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1)); 2025105197Ssam 2026105197Ssam if ((sp = key_getspbyid(newid)) == NULL) 2027105197Ssam break; 2028105197Ssam 2029105197Ssam KEY_FREESP(&sp); 2030105197Ssam } 2031105197Ssam 2032105197Ssam if (count == 0 || newid == 0) { 2033120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", 2034120585Ssam __func__)); 2035105197Ssam return 0; 2036105197Ssam } 2037105197Ssam 2038105197Ssam return newid; 2039105197Ssam} 2040105197Ssam 2041105197Ssam/* 2042105197Ssam * SADB_SPDDELETE processing 2043105197Ssam * receive 2044105197Ssam * <base, address(SD), policy(*)> 2045105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2046105197Ssam * and send, 2047105197Ssam * <base, address(SD), policy(*)> 2048105197Ssam * to the ikmpd. 2049105197Ssam * policy(*) including direction of policy. 2050105197Ssam * 2051105197Ssam * m will always be freed. 2052105197Ssam */ 2053105197Ssamstatic int 2054105197Ssamkey_spddelete(so, m, mhp) 2055105197Ssam struct socket *so; 2056105197Ssam struct mbuf *m; 2057105197Ssam const struct sadb_msghdr *mhp; 2058105197Ssam{ 2059105197Ssam struct sadb_address *src0, *dst0; 2060105197Ssam struct sadb_x_policy *xpl0; 2061105197Ssam struct secpolicyindex spidx; 2062105197Ssam struct secpolicy *sp; 2063105197Ssam 2064120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 2065120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2066120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2067120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2068105197Ssam 2069105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2070105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2071105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2072120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2073120585Ssam __func__)); 2074105197Ssam return key_senderror(so, m, EINVAL); 2075105197Ssam } 2076105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2077105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2078105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2079120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2080120585Ssam __func__)); 2081105197Ssam return key_senderror(so, m, EINVAL); 2082105197Ssam } 2083105197Ssam 2084105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2085105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2086105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2087105197Ssam 2088194062Svanhu /* 2089194062Svanhu * Note: do not parse SADB_X_EXT_NAT_T_* here: 2090194062Svanhu * we are processing traffic endpoints. 2091194062Svanhu */ 2092194062Svanhu 2093105197Ssam /* make secindex */ 2094105197Ssam /* XXX boundary check against sa_len */ 2095105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2096105197Ssam src0 + 1, 2097105197Ssam dst0 + 1, 2098105197Ssam src0->sadb_address_prefixlen, 2099105197Ssam dst0->sadb_address_prefixlen, 2100105197Ssam src0->sadb_address_proto, 2101105197Ssam &spidx); 2102105197Ssam 2103105197Ssam /* checking the direciton. */ 2104105197Ssam switch (xpl0->sadb_x_policy_dir) { 2105105197Ssam case IPSEC_DIR_INBOUND: 2106105197Ssam case IPSEC_DIR_OUTBOUND: 2107105197Ssam break; 2108105197Ssam default: 2109120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 2110105197Ssam return key_senderror(so, m, EINVAL); 2111105197Ssam } 2112105197Ssam 2113105197Ssam /* Is there SP in SPD ? */ 2114105197Ssam if ((sp = key_getsp(&spidx)) == NULL) { 2115120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); 2116105197Ssam return key_senderror(so, m, EINVAL); 2117105197Ssam } 2118105197Ssam 2119105197Ssam /* save policy id to buffer to be returned. */ 2120105197Ssam xpl0->sadb_x_policy_id = sp->id; 2121105197Ssam 2122206659Svanhu SPTREE_LOCK(); 2123105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2124206659Svanhu SPTREE_UNLOCK(); 2125105197Ssam KEY_FREESP(&sp); 2126105197Ssam 2127105197Ssam { 2128105197Ssam struct mbuf *n; 2129105197Ssam struct sadb_msg *newmsg; 2130105197Ssam 2131194062Svanhu /* 2132194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 2133194062Svanhu * we are sending traffic endpoints. 2134194062Svanhu */ 2135194062Svanhu 2136105197Ssam /* create new sadb_msg to reply. */ 2137105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2138105197Ssam SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2139105197Ssam if (!n) 2140105197Ssam return key_senderror(so, m, ENOBUFS); 2141105197Ssam 2142105197Ssam newmsg = mtod(n, struct sadb_msg *); 2143105197Ssam newmsg->sadb_msg_errno = 0; 2144105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2145105197Ssam 2146105197Ssam m_freem(m); 2147105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2148105197Ssam } 2149105197Ssam} 2150105197Ssam 2151105197Ssam/* 2152105197Ssam * SADB_SPDDELETE2 processing 2153105197Ssam * receive 2154105197Ssam * <base, policy(*)> 2155105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2156105197Ssam * and send, 2157105197Ssam * <base, policy(*)> 2158105197Ssam * to the ikmpd. 2159105197Ssam * policy(*) including direction of policy. 2160105197Ssam * 2161105197Ssam * m will always be freed. 2162105197Ssam */ 2163105197Ssamstatic int 2164105197Ssamkey_spddelete2(so, m, mhp) 2165105197Ssam struct socket *so; 2166105197Ssam struct mbuf *m; 2167105197Ssam const struct sadb_msghdr *mhp; 2168105197Ssam{ 2169105197Ssam u_int32_t id; 2170105197Ssam struct secpolicy *sp; 2171105197Ssam 2172120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2173120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2174120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2175120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2176105197Ssam 2177105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2178105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2179120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); 2180170803Sbz return key_senderror(so, m, EINVAL); 2181105197Ssam } 2182105197Ssam 2183105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2184105197Ssam 2185105197Ssam /* Is there SP in SPD ? */ 2186105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2187120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2188170803Sbz return key_senderror(so, m, EINVAL); 2189105197Ssam } 2190105197Ssam 2191206659Svanhu SPTREE_LOCK(); 2192105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2193206659Svanhu SPTREE_UNLOCK(); 2194105197Ssam KEY_FREESP(&sp); 2195105197Ssam 2196105197Ssam { 2197105197Ssam struct mbuf *n, *nn; 2198105197Ssam struct sadb_msg *newmsg; 2199105197Ssam int off, len; 2200105197Ssam 2201105197Ssam /* create new sadb_msg to reply. */ 2202105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2203105197Ssam 2204111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 2205105197Ssam if (n && len > MHLEN) { 2206111119Simp MCLGET(n, M_DONTWAIT); 2207105197Ssam if ((n->m_flags & M_EXT) == 0) { 2208105197Ssam m_freem(n); 2209105197Ssam n = NULL; 2210105197Ssam } 2211105197Ssam } 2212105197Ssam if (!n) 2213105197Ssam return key_senderror(so, m, ENOBUFS); 2214105197Ssam 2215105197Ssam n->m_len = len; 2216105197Ssam n->m_next = NULL; 2217105197Ssam off = 0; 2218105197Ssam 2219105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2220105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2221105197Ssam 2222120585Ssam IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)", 2223120585Ssam off, len)); 2224105197Ssam 2225105197Ssam n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2226111119Simp mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2227105197Ssam if (!n->m_next) { 2228105197Ssam m_freem(n); 2229105197Ssam return key_senderror(so, m, ENOBUFS); 2230105197Ssam } 2231105197Ssam 2232105197Ssam n->m_pkthdr.len = 0; 2233105197Ssam for (nn = n; nn; nn = nn->m_next) 2234105197Ssam n->m_pkthdr.len += nn->m_len; 2235105197Ssam 2236105197Ssam newmsg = mtod(n, struct sadb_msg *); 2237105197Ssam newmsg->sadb_msg_errno = 0; 2238105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2239105197Ssam 2240105197Ssam m_freem(m); 2241105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2242105197Ssam } 2243105197Ssam} 2244105197Ssam 2245105197Ssam/* 2246105197Ssam * SADB_X_GET processing 2247105197Ssam * receive 2248105197Ssam * <base, policy(*)> 2249105197Ssam * from the user(?), 2250105197Ssam * and send, 2251105197Ssam * <base, address(SD), policy> 2252105197Ssam * to the ikmpd. 2253105197Ssam * policy(*) including direction of policy. 2254105197Ssam * 2255105197Ssam * m will always be freed. 2256105197Ssam */ 2257105197Ssamstatic int 2258105197Ssamkey_spdget(so, m, mhp) 2259105197Ssam struct socket *so; 2260105197Ssam struct mbuf *m; 2261105197Ssam const struct sadb_msghdr *mhp; 2262105197Ssam{ 2263105197Ssam u_int32_t id; 2264105197Ssam struct secpolicy *sp; 2265105197Ssam struct mbuf *n; 2266105197Ssam 2267120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2268120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2269120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2270120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2271105197Ssam 2272105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2273105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2274120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2275120585Ssam __func__)); 2276105197Ssam return key_senderror(so, m, EINVAL); 2277105197Ssam } 2278105197Ssam 2279105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2280105197Ssam 2281105197Ssam /* Is there SP in SPD ? */ 2282105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2283120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2284105197Ssam return key_senderror(so, m, ENOENT); 2285105197Ssam } 2286105197Ssam 2287105197Ssam n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2288105197Ssam if (n != NULL) { 2289105197Ssam m_freem(m); 2290105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2291105197Ssam } else 2292105197Ssam return key_senderror(so, m, ENOBUFS); 2293105197Ssam} 2294105197Ssam 2295105197Ssam/* 2296105197Ssam * SADB_X_SPDACQUIRE processing. 2297105197Ssam * Acquire policy and SA(s) for a *OUTBOUND* packet. 2298105197Ssam * send 2299105197Ssam * <base, policy(*)> 2300105197Ssam * to KMD, and expect to receive 2301105197Ssam * <base> with SADB_X_SPDACQUIRE if error occured, 2302105197Ssam * or 2303105197Ssam * <base, policy> 2304105197Ssam * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2305105197Ssam * policy(*) is without policy requests. 2306105197Ssam * 2307105197Ssam * 0 : succeed 2308105197Ssam * others: error number 2309105197Ssam */ 2310105197Ssamint 2311105197Ssamkey_spdacquire(sp) 2312105197Ssam struct secpolicy *sp; 2313105197Ssam{ 2314105197Ssam struct mbuf *result = NULL, *m; 2315105197Ssam struct secspacq *newspacq; 2316105197Ssam 2317120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2318120585Ssam IPSEC_ASSERT(sp->req == NULL, ("policy exists")); 2319120585Ssam IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 2320120585Ssam ("policy not IPSEC %u", sp->policy)); 2321105197Ssam 2322108533Sschweikh /* Get an entry to check whether sent message or not. */ 2323119643Ssam newspacq = key_getspacq(&sp->spidx); 2324119643Ssam if (newspacq != NULL) { 2325181803Sbz if (V_key_blockacq_count < newspacq->count) { 2326105197Ssam /* reset counter and do send message. */ 2327105197Ssam newspacq->count = 0; 2328105197Ssam } else { 2329105197Ssam /* increment counter and do nothing. */ 2330105197Ssam newspacq->count++; 2331105197Ssam return 0; 2332105197Ssam } 2333120585Ssam SPACQ_UNLOCK(); 2334105197Ssam } else { 2335105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 2336119643Ssam newspacq = key_newspacq(&sp->spidx); 2337119643Ssam if (newspacq == NULL) 2338105197Ssam return ENOBUFS; 2339105197Ssam } 2340105197Ssam 2341105197Ssam /* create new sadb_msg to reply. */ 2342105197Ssam m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2343170805Sbz if (!m) 2344170805Sbz return ENOBUFS; 2345170805Sbz 2346105197Ssam result = m; 2347105197Ssam 2348105197Ssam result->m_pkthdr.len = 0; 2349105197Ssam for (m = result; m; m = m->m_next) 2350105197Ssam result->m_pkthdr.len += m->m_len; 2351105197Ssam 2352105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2353105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2354105197Ssam 2355105197Ssam return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2356105197Ssam} 2357105197Ssam 2358105197Ssam/* 2359105197Ssam * SADB_SPDFLUSH processing 2360105197Ssam * receive 2361105197Ssam * <base> 2362105197Ssam * from the user, and free all entries in secpctree. 2363105197Ssam * and send, 2364105197Ssam * <base> 2365105197Ssam * to the user. 2366105197Ssam * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2367105197Ssam * 2368105197Ssam * m will always be freed. 2369105197Ssam */ 2370105197Ssamstatic int 2371105197Ssamkey_spdflush(so, m, mhp) 2372105197Ssam struct socket *so; 2373105197Ssam struct mbuf *m; 2374105197Ssam const struct sadb_msghdr *mhp; 2375105197Ssam{ 2376105197Ssam struct sadb_msg *newmsg; 2377105197Ssam struct secpolicy *sp; 2378105197Ssam u_int dir; 2379105197Ssam 2380120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2381120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2382120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2383120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2384105197Ssam 2385105197Ssam if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2386105197Ssam return key_senderror(so, m, EINVAL); 2387105197Ssam 2388105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2389120585Ssam SPTREE_LOCK(); 2390181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) 2391105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2392120585Ssam SPTREE_UNLOCK(); 2393105197Ssam } 2394105197Ssam 2395105197Ssam if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2396120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2397105197Ssam return key_senderror(so, m, ENOBUFS); 2398105197Ssam } 2399105197Ssam 2400105197Ssam if (m->m_next) 2401105197Ssam m_freem(m->m_next); 2402105197Ssam m->m_next = NULL; 2403105197Ssam m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2404105197Ssam newmsg = mtod(m, struct sadb_msg *); 2405105197Ssam newmsg->sadb_msg_errno = 0; 2406105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2407105197Ssam 2408105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2409105197Ssam} 2410105197Ssam 2411105197Ssam/* 2412105197Ssam * SADB_SPDDUMP processing 2413105197Ssam * receive 2414105197Ssam * <base> 2415105197Ssam * from the user, and dump all SP leaves 2416105197Ssam * and send, 2417105197Ssam * <base> ..... 2418105197Ssam * to the ikmpd. 2419105197Ssam * 2420105197Ssam * m will always be freed. 2421105197Ssam */ 2422105197Ssamstatic int 2423105197Ssamkey_spddump(so, m, mhp) 2424105197Ssam struct socket *so; 2425105197Ssam struct mbuf *m; 2426105197Ssam const struct sadb_msghdr *mhp; 2427105197Ssam{ 2428105197Ssam struct secpolicy *sp; 2429105197Ssam int cnt; 2430105197Ssam u_int dir; 2431105197Ssam struct mbuf *n; 2432105197Ssam 2433120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2434120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2435120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2436120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2437105197Ssam 2438105197Ssam /* search SPD entry and get buffer size. */ 2439105197Ssam cnt = 0; 2440192882Svanhu SPTREE_LOCK(); 2441105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2442181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2443105197Ssam cnt++; 2444105197Ssam } 2445105197Ssam } 2446105197Ssam 2447192882Svanhu if (cnt == 0) { 2448192882Svanhu SPTREE_UNLOCK(); 2449105197Ssam return key_senderror(so, m, ENOENT); 2450192882Svanhu } 2451105197Ssam 2452105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2453181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2454105197Ssam --cnt; 2455105197Ssam n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2456105197Ssam mhp->msg->sadb_msg_pid); 2457105197Ssam 2458105197Ssam if (n) 2459105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2460105197Ssam } 2461105197Ssam } 2462105197Ssam 2463192882Svanhu SPTREE_UNLOCK(); 2464105197Ssam m_freem(m); 2465105197Ssam return 0; 2466105197Ssam} 2467105197Ssam 2468105197Ssamstatic struct mbuf * 2469189004Srdivackykey_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) 2470105197Ssam{ 2471105197Ssam struct mbuf *result = NULL, *m; 2472181330Svanhu struct seclifetime lt; 2473105197Ssam 2474105197Ssam m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2475105197Ssam if (!m) 2476105197Ssam goto fail; 2477105197Ssam result = m; 2478105197Ssam 2479194062Svanhu /* 2480194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 2481194062Svanhu * we are sending traffic endpoints. 2482194062Svanhu */ 2483105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2484105197Ssam &sp->spidx.src.sa, sp->spidx.prefs, 2485105197Ssam sp->spidx.ul_proto); 2486105197Ssam if (!m) 2487105197Ssam goto fail; 2488105197Ssam m_cat(result, m); 2489105197Ssam 2490105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2491105197Ssam &sp->spidx.dst.sa, sp->spidx.prefd, 2492105197Ssam sp->spidx.ul_proto); 2493105197Ssam if (!m) 2494105197Ssam goto fail; 2495105197Ssam m_cat(result, m); 2496105197Ssam 2497105197Ssam m = key_sp2msg(sp); 2498105197Ssam if (!m) 2499105197Ssam goto fail; 2500105197Ssam m_cat(result, m); 2501105197Ssam 2502181330Svanhu if(sp->lifetime){ 2503181330Svanhu lt.addtime=sp->created; 2504181330Svanhu lt.usetime= sp->lastused; 2505181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT); 2506181330Svanhu if (!m) 2507181330Svanhu goto fail; 2508181330Svanhu m_cat(result, m); 2509181330Svanhu 2510181330Svanhu lt.addtime=sp->lifetime; 2511181330Svanhu lt.usetime= sp->validtime; 2512181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD); 2513181330Svanhu if (!m) 2514181330Svanhu goto fail; 2515181330Svanhu m_cat(result, m); 2516181330Svanhu } 2517181330Svanhu 2518105197Ssam if ((result->m_flags & M_PKTHDR) == 0) 2519105197Ssam goto fail; 2520105197Ssam 2521105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2522105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2523105197Ssam if (result == NULL) 2524105197Ssam goto fail; 2525105197Ssam } 2526105197Ssam 2527105197Ssam result->m_pkthdr.len = 0; 2528105197Ssam for (m = result; m; m = m->m_next) 2529105197Ssam result->m_pkthdr.len += m->m_len; 2530105197Ssam 2531105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2532105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2533105197Ssam 2534105197Ssam return result; 2535105197Ssam 2536105197Ssamfail: 2537105197Ssam m_freem(result); 2538105197Ssam return NULL; 2539105197Ssam} 2540105197Ssam 2541105197Ssam/* 2542105197Ssam * get PFKEY message length for security policy and request. 2543105197Ssam */ 2544105197Ssamstatic u_int 2545105197Ssamkey_getspreqmsglen(sp) 2546105197Ssam struct secpolicy *sp; 2547105197Ssam{ 2548105197Ssam u_int tlen; 2549105197Ssam 2550105197Ssam tlen = sizeof(struct sadb_x_policy); 2551105197Ssam 2552105197Ssam /* if is the policy for ipsec ? */ 2553105197Ssam if (sp->policy != IPSEC_POLICY_IPSEC) 2554105197Ssam return tlen; 2555105197Ssam 2556105197Ssam /* get length of ipsec requests */ 2557105197Ssam { 2558105197Ssam struct ipsecrequest *isr; 2559105197Ssam int len; 2560105197Ssam 2561105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 2562105197Ssam len = sizeof(struct sadb_x_ipsecrequest) 2563105197Ssam + isr->saidx.src.sa.sa_len 2564105197Ssam + isr->saidx.dst.sa.sa_len; 2565105197Ssam 2566105197Ssam tlen += PFKEY_ALIGN8(len); 2567105197Ssam } 2568105197Ssam } 2569105197Ssam 2570105197Ssam return tlen; 2571105197Ssam} 2572105197Ssam 2573105197Ssam/* 2574105197Ssam * SADB_SPDEXPIRE processing 2575105197Ssam * send 2576105197Ssam * <base, address(SD), lifetime(CH), policy> 2577105197Ssam * to KMD by PF_KEY. 2578105197Ssam * 2579105197Ssam * OUT: 0 : succeed 2580105197Ssam * others : error number 2581105197Ssam */ 2582105197Ssamstatic int 2583105197Ssamkey_spdexpire(sp) 2584105197Ssam struct secpolicy *sp; 2585105197Ssam{ 2586105197Ssam struct mbuf *result = NULL, *m; 2587105197Ssam int len; 2588105197Ssam int error = -1; 2589105197Ssam struct sadb_lifetime *lt; 2590105197Ssam 2591105197Ssam /* XXX: Why do we lock ? */ 2592105197Ssam 2593120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2594105197Ssam 2595105197Ssam /* set msg header */ 2596105197Ssam m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2597105197Ssam if (!m) { 2598105197Ssam error = ENOBUFS; 2599105197Ssam goto fail; 2600105197Ssam } 2601105197Ssam result = m; 2602105197Ssam 2603105197Ssam /* create lifetime extension (current and hard) */ 2604105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2605105197Ssam m = key_alloc_mbuf(len); 2606105197Ssam if (!m || m->m_next) { /*XXX*/ 2607105197Ssam if (m) 2608105197Ssam m_freem(m); 2609105197Ssam error = ENOBUFS; 2610105197Ssam goto fail; 2611105197Ssam } 2612105197Ssam bzero(mtod(m, caddr_t), len); 2613105197Ssam lt = mtod(m, struct sadb_lifetime *); 2614105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2615105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2616105197Ssam lt->sadb_lifetime_allocations = 0; 2617105197Ssam lt->sadb_lifetime_bytes = 0; 2618105197Ssam lt->sadb_lifetime_addtime = sp->created; 2619105197Ssam lt->sadb_lifetime_usetime = sp->lastused; 2620105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2621105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2622105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2623105197Ssam lt->sadb_lifetime_allocations = 0; 2624105197Ssam lt->sadb_lifetime_bytes = 0; 2625105197Ssam lt->sadb_lifetime_addtime = sp->lifetime; 2626105197Ssam lt->sadb_lifetime_usetime = sp->validtime; 2627105197Ssam m_cat(result, m); 2628105197Ssam 2629194062Svanhu /* 2630194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 2631194062Svanhu * we are sending traffic endpoints. 2632194062Svanhu */ 2633194062Svanhu 2634105197Ssam /* set sadb_address for source */ 2635105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2636105197Ssam &sp->spidx.src.sa, 2637105197Ssam sp->spidx.prefs, sp->spidx.ul_proto); 2638105197Ssam if (!m) { 2639105197Ssam error = ENOBUFS; 2640105197Ssam goto fail; 2641105197Ssam } 2642105197Ssam m_cat(result, m); 2643105197Ssam 2644105197Ssam /* set sadb_address for destination */ 2645105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2646105197Ssam &sp->spidx.dst.sa, 2647105197Ssam sp->spidx.prefd, sp->spidx.ul_proto); 2648105197Ssam if (!m) { 2649105197Ssam error = ENOBUFS; 2650105197Ssam goto fail; 2651105197Ssam } 2652105197Ssam m_cat(result, m); 2653105197Ssam 2654105197Ssam /* set secpolicy */ 2655105197Ssam m = key_sp2msg(sp); 2656105197Ssam if (!m) { 2657105197Ssam error = ENOBUFS; 2658105197Ssam goto fail; 2659105197Ssam } 2660105197Ssam m_cat(result, m); 2661105197Ssam 2662105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 2663105197Ssam error = EINVAL; 2664105197Ssam goto fail; 2665105197Ssam } 2666105197Ssam 2667105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2668105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2669105197Ssam if (result == NULL) { 2670105197Ssam error = ENOBUFS; 2671105197Ssam goto fail; 2672105197Ssam } 2673105197Ssam } 2674105197Ssam 2675105197Ssam result->m_pkthdr.len = 0; 2676105197Ssam for (m = result; m; m = m->m_next) 2677105197Ssam result->m_pkthdr.len += m->m_len; 2678105197Ssam 2679105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2680105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2681105197Ssam 2682105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2683105197Ssam 2684105197Ssam fail: 2685105197Ssam if (result) 2686105197Ssam m_freem(result); 2687105197Ssam return error; 2688105197Ssam} 2689105197Ssam 2690105197Ssam/* %%% SAD management */ 2691105197Ssam/* 2692105197Ssam * allocating a memory for new SA head, and copy from the values of mhp. 2693105197Ssam * OUT: NULL : failure due to the lack of memory. 2694105197Ssam * others : pointer to new SA head. 2695105197Ssam */ 2696105197Ssamstatic struct secashead * 2697105197Ssamkey_newsah(saidx) 2698105197Ssam struct secasindex *saidx; 2699105197Ssam{ 2700105197Ssam struct secashead *newsah; 2701105197Ssam 2702120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2703105197Ssam 2704119643Ssam newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2705105197Ssam if (newsah != NULL) { 2706105197Ssam int i; 2707105197Ssam for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2708105197Ssam LIST_INIT(&newsah->savtree[i]); 2709105197Ssam newsah->saidx = *saidx; 2710105197Ssam 2711105197Ssam /* add to saidxtree */ 2712105197Ssam newsah->state = SADB_SASTATE_MATURE; 2713119643Ssam 2714120585Ssam SAHTREE_LOCK(); 2715181803Sbz LIST_INSERT_HEAD(&V_sahtree, newsah, chain); 2716120585Ssam SAHTREE_UNLOCK(); 2717105197Ssam } 2718105197Ssam return(newsah); 2719105197Ssam} 2720105197Ssam 2721105197Ssam/* 2722105197Ssam * delete SA index and all SA registerd. 2723105197Ssam */ 2724105197Ssamstatic void 2725105197Ssamkey_delsah(sah) 2726105197Ssam struct secashead *sah; 2727105197Ssam{ 2728105197Ssam struct secasvar *sav, *nextsav; 2729120585Ssam u_int stateidx; 2730105197Ssam int zombie = 0; 2731105197Ssam 2732120585Ssam IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2733120585Ssam SAHTREE_LOCK_ASSERT(); 2734105197Ssam 2735105197Ssam /* searching all SA registerd in the secindex. */ 2736105197Ssam for (stateidx = 0; 2737185348Szec stateidx < _ARRAYLEN(saorder_state_any); 2738105197Ssam stateidx++) { 2739185348Szec u_int state = saorder_state_any[stateidx]; 2740120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2741105197Ssam if (sav->refcnt == 0) { 2742105197Ssam /* sanity check */ 2743120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 2744190071Svanhu /* 2745190071Svanhu * do NOT call KEY_FREESAV here: 2746190071Svanhu * it will only delete the sav if refcnt == 1, 2747189962Svanhu * where we already know that refcnt == 0 2748189962Svanhu */ 2749189962Svanhu key_delsav(sav); 2750105197Ssam } else { 2751105197Ssam /* give up to delete this sa */ 2752105197Ssam zombie++; 2753105197Ssam } 2754105197Ssam } 2755105197Ssam } 2756120585Ssam if (!zombie) { /* delete only if there are savs */ 2757120585Ssam /* remove from tree of SA index */ 2758120585Ssam if (__LIST_CHAINED(sah)) 2759120585Ssam LIST_REMOVE(sah, chain); 2760120585Ssam if (sah->sa_route.ro_rt) { 2761120585Ssam RTFREE(sah->sa_route.ro_rt); 2762120585Ssam sah->sa_route.ro_rt = (struct rtentry *)NULL; 2763120585Ssam } 2764120585Ssam free(sah, M_IPSEC_SAH); 2765105197Ssam } 2766105197Ssam} 2767105197Ssam 2768105197Ssam/* 2769105197Ssam * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2770105197Ssam * and copy the values of mhp into new buffer. 2771105197Ssam * When SAD message type is GETSPI: 2772105197Ssam * to set sequence number from acq_seq++, 2773105197Ssam * to set zero to SPI. 2774105197Ssam * not to call key_setsava(). 2775105197Ssam * OUT: NULL : fail 2776105197Ssam * others : pointer to new secasvar. 2777105197Ssam * 2778105197Ssam * does not modify mbuf. does not free mbuf on error. 2779105197Ssam */ 2780105197Ssamstatic struct secasvar * 2781105197Ssamkey_newsav(m, mhp, sah, errp, where, tag) 2782105197Ssam struct mbuf *m; 2783105197Ssam const struct sadb_msghdr *mhp; 2784105197Ssam struct secashead *sah; 2785105197Ssam int *errp; 2786105197Ssam const char* where; 2787105197Ssam int tag; 2788105197Ssam{ 2789105197Ssam struct secasvar *newsav; 2790105197Ssam const struct sadb_sa *xsa; 2791105197Ssam 2792120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2793120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2794120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2795120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 2796105197Ssam 2797119643Ssam newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2798105197Ssam if (newsav == NULL) { 2799120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2800105197Ssam *errp = ENOBUFS; 2801105197Ssam goto done; 2802105197Ssam } 2803105197Ssam 2804105197Ssam switch (mhp->msg->sadb_msg_type) { 2805105197Ssam case SADB_GETSPI: 2806105197Ssam newsav->spi = 0; 2807105197Ssam 2808105197Ssam#ifdef IPSEC_DOSEQCHECK 2809105197Ssam /* sync sequence number */ 2810105197Ssam if (mhp->msg->sadb_msg_seq == 0) 2811105197Ssam newsav->seq = 2812181803Sbz (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); 2813105197Ssam else 2814105197Ssam#endif 2815105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2816105197Ssam break; 2817105197Ssam 2818105197Ssam case SADB_ADD: 2819105197Ssam /* sanity check */ 2820105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 2821119643Ssam free(newsav, M_IPSEC_SA); 2822119643Ssam newsav = NULL; 2823120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2824120585Ssam __func__)); 2825105197Ssam *errp = EINVAL; 2826105197Ssam goto done; 2827105197Ssam } 2828105197Ssam xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2829105197Ssam newsav->spi = xsa->sadb_sa_spi; 2830105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2831105197Ssam break; 2832105197Ssam default: 2833119643Ssam free(newsav, M_IPSEC_SA); 2834119643Ssam newsav = NULL; 2835105197Ssam *errp = EINVAL; 2836105197Ssam goto done; 2837105197Ssam } 2838105197Ssam 2839119643Ssam 2840105197Ssam /* copy sav values */ 2841105197Ssam if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2842105197Ssam *errp = key_setsaval(newsav, m, mhp); 2843105197Ssam if (*errp) { 2844119643Ssam free(newsav, M_IPSEC_SA); 2845119643Ssam newsav = NULL; 2846105197Ssam goto done; 2847105197Ssam } 2848105197Ssam } 2849105197Ssam 2850120585Ssam SECASVAR_LOCK_INIT(newsav); 2851119643Ssam 2852105197Ssam /* reset created */ 2853105197Ssam newsav->created = time_second; 2854105197Ssam newsav->pid = mhp->msg->sadb_msg_pid; 2855105197Ssam 2856105197Ssam /* add to satree */ 2857105197Ssam newsav->sah = sah; 2858158767Spjd sa_initref(newsav); 2859105197Ssam newsav->state = SADB_SASTATE_LARVAL; 2860119643Ssam 2861199398Svanhu SAHTREE_LOCK(); 2862105197Ssam LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2863105197Ssam secasvar, chain); 2864199398Svanhu SAHTREE_UNLOCK(); 2865105197Ssamdone: 2866105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2867120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 2868105197Ssam where, tag, newsav)); 2869105197Ssam 2870105197Ssam return newsav; 2871105197Ssam} 2872105197Ssam 2873105197Ssam/* 2874105197Ssam * free() SA variable entry. 2875105197Ssam */ 2876105197Ssamstatic void 2877119643Ssamkey_cleansav(struct secasvar *sav) 2878105197Ssam{ 2879117051Ssam /* 2880117051Ssam * Cleanup xform state. Note that zeroize'ing causes the 2881117051Ssam * keys to be cleared; otherwise we must do it ourself. 2882117051Ssam */ 2883117051Ssam if (sav->tdb_xform != NULL) { 2884117051Ssam sav->tdb_xform->xf_zeroize(sav); 2885117051Ssam sav->tdb_xform = NULL; 2886117051Ssam } else { 2887120585Ssam KASSERT(sav->iv == NULL, ("iv but no xform")); 2888117051Ssam if (sav->key_auth != NULL) 2889157123Sgnn bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); 2890117051Ssam if (sav->key_enc != NULL) 2891157123Sgnn bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc)); 2892117051Ssam } 2893105197Ssam if (sav->key_auth != NULL) { 2894157123Sgnn if (sav->key_auth->key_data != NULL) 2895157123Sgnn free(sav->key_auth->key_data, M_IPSEC_MISC); 2896119643Ssam free(sav->key_auth, M_IPSEC_MISC); 2897105197Ssam sav->key_auth = NULL; 2898105197Ssam } 2899105197Ssam if (sav->key_enc != NULL) { 2900157123Sgnn if (sav->key_enc->key_data != NULL) 2901157123Sgnn free(sav->key_enc->key_data, M_IPSEC_MISC); 2902119643Ssam free(sav->key_enc, M_IPSEC_MISC); 2903105197Ssam sav->key_enc = NULL; 2904105197Ssam } 2905105197Ssam if (sav->sched) { 2906105197Ssam bzero(sav->sched, sav->schedlen); 2907119643Ssam free(sav->sched, M_IPSEC_MISC); 2908105197Ssam sav->sched = NULL; 2909105197Ssam } 2910105197Ssam if (sav->replay != NULL) { 2911119643Ssam free(sav->replay, M_IPSEC_MISC); 2912105197Ssam sav->replay = NULL; 2913105197Ssam } 2914105197Ssam if (sav->lft_c != NULL) { 2915119643Ssam free(sav->lft_c, M_IPSEC_MISC); 2916105197Ssam sav->lft_c = NULL; 2917105197Ssam } 2918105197Ssam if (sav->lft_h != NULL) { 2919119643Ssam free(sav->lft_h, M_IPSEC_MISC); 2920105197Ssam sav->lft_h = NULL; 2921105197Ssam } 2922105197Ssam if (sav->lft_s != NULL) { 2923119643Ssam free(sav->lft_s, M_IPSEC_MISC); 2924105197Ssam sav->lft_s = NULL; 2925105197Ssam } 2926119643Ssam} 2927105197Ssam 2928119643Ssam/* 2929119643Ssam * free() SA variable entry. 2930119643Ssam */ 2931119643Ssamstatic void 2932119643Ssamkey_delsav(sav) 2933119643Ssam struct secasvar *sav; 2934119643Ssam{ 2935120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 2936120585Ssam IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2937105197Ssam 2938119643Ssam /* remove from SA header */ 2939119643Ssam if (__LIST_CHAINED(sav)) 2940119643Ssam LIST_REMOVE(sav, chain); 2941119643Ssam key_cleansav(sav); 2942120585Ssam SECASVAR_LOCK_DESTROY(sav); 2943119643Ssam free(sav, M_IPSEC_SA); 2944105197Ssam} 2945105197Ssam 2946105197Ssam/* 2947105197Ssam * search SAD. 2948105197Ssam * OUT: 2949105197Ssam * NULL : not found 2950105197Ssam * others : found, pointer to a SA. 2951105197Ssam */ 2952105197Ssamstatic struct secashead * 2953105197Ssamkey_getsah(saidx) 2954105197Ssam struct secasindex *saidx; 2955105197Ssam{ 2956105197Ssam struct secashead *sah; 2957105197Ssam 2958120585Ssam SAHTREE_LOCK(); 2959181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2960105197Ssam if (sah->state == SADB_SASTATE_DEAD) 2961105197Ssam continue; 2962105197Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2963119643Ssam break; 2964105197Ssam } 2965120585Ssam SAHTREE_UNLOCK(); 2966105197Ssam 2967119643Ssam return sah; 2968105197Ssam} 2969105197Ssam 2970105197Ssam/* 2971105197Ssam * check not to be duplicated SPI. 2972105197Ssam * NOTE: this function is too slow due to searching all SAD. 2973105197Ssam * OUT: 2974105197Ssam * NULL : not found 2975105197Ssam * others : found, pointer to a SA. 2976105197Ssam */ 2977105197Ssamstatic struct secasvar * 2978105197Ssamkey_checkspidup(saidx, spi) 2979105197Ssam struct secasindex *saidx; 2980105197Ssam u_int32_t spi; 2981105197Ssam{ 2982105197Ssam struct secashead *sah; 2983105197Ssam struct secasvar *sav; 2984105197Ssam 2985105197Ssam /* check address family */ 2986105197Ssam if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2987120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2988120585Ssam __func__)); 2989105197Ssam return NULL; 2990105197Ssam } 2991105197Ssam 2992119643Ssam sav = NULL; 2993105197Ssam /* check all SAD */ 2994120585Ssam SAHTREE_LOCK(); 2995181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2996105197Ssam if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 2997105197Ssam continue; 2998105197Ssam sav = key_getsavbyspi(sah, spi); 2999105197Ssam if (sav != NULL) 3000119643Ssam break; 3001105197Ssam } 3002120585Ssam SAHTREE_UNLOCK(); 3003105197Ssam 3004119643Ssam return sav; 3005105197Ssam} 3006105197Ssam 3007105197Ssam/* 3008105197Ssam * search SAD litmited alive SA, protocol, SPI. 3009105197Ssam * OUT: 3010105197Ssam * NULL : not found 3011105197Ssam * others : found, pointer to a SA. 3012105197Ssam */ 3013105197Ssamstatic struct secasvar * 3014105197Ssamkey_getsavbyspi(sah, spi) 3015105197Ssam struct secashead *sah; 3016105197Ssam u_int32_t spi; 3017105197Ssam{ 3018105197Ssam struct secasvar *sav; 3019105197Ssam u_int stateidx, state; 3020105197Ssam 3021119643Ssam sav = NULL; 3022120585Ssam SAHTREE_LOCK_ASSERT(); 3023105197Ssam /* search all status */ 3024105197Ssam for (stateidx = 0; 3025185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 3026105197Ssam stateidx++) { 3027105197Ssam 3028185348Szec state = saorder_state_alive[stateidx]; 3029105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 3030105197Ssam 3031105197Ssam /* sanity check */ 3032105197Ssam if (sav->state != state) { 3033120585Ssam ipseclog((LOG_DEBUG, "%s: " 3034105197Ssam "invalid sav->state (queue: %d SA: %d)\n", 3035120585Ssam __func__, state, sav->state)); 3036105197Ssam continue; 3037105197Ssam } 3038105197Ssam 3039105197Ssam if (sav->spi == spi) 3040128859Ssam return sav; 3041105197Ssam } 3042105197Ssam } 3043105197Ssam 3044128859Ssam return NULL; 3045105197Ssam} 3046105197Ssam 3047105197Ssam/* 3048105197Ssam * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3049105197Ssam * You must update these if need. 3050105197Ssam * OUT: 0: success. 3051105197Ssam * !0: failure. 3052105197Ssam * 3053105197Ssam * does not modify mbuf. does not free mbuf on error. 3054105197Ssam */ 3055105197Ssamstatic int 3056105197Ssamkey_setsaval(sav, m, mhp) 3057105197Ssam struct secasvar *sav; 3058105197Ssam struct mbuf *m; 3059105197Ssam const struct sadb_msghdr *mhp; 3060105197Ssam{ 3061105197Ssam int error = 0; 3062105197Ssam 3063120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 3064120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 3065120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 3066105197Ssam 3067105197Ssam /* initialization */ 3068105197Ssam sav->replay = NULL; 3069105197Ssam sav->key_auth = NULL; 3070105197Ssam sav->key_enc = NULL; 3071105197Ssam sav->sched = NULL; 3072105197Ssam sav->schedlen = 0; 3073105197Ssam sav->iv = NULL; 3074105197Ssam sav->lft_c = NULL; 3075105197Ssam sav->lft_h = NULL; 3076105197Ssam sav->lft_s = NULL; 3077105197Ssam sav->tdb_xform = NULL; /* transform */ 3078105197Ssam sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3079105197Ssam sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3080105197Ssam sav->tdb_compalgxform = NULL; /* compression algorithm */ 3081194062Svanhu /* Initialize even if NAT-T not compiled in: */ 3082194062Svanhu sav->natt_type = 0; 3083194062Svanhu sav->natt_esp_frag_len = 0; 3084105197Ssam 3085105197Ssam /* SA */ 3086105197Ssam if (mhp->ext[SADB_EXT_SA] != NULL) { 3087105197Ssam const struct sadb_sa *sa0; 3088105197Ssam 3089105197Ssam sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3090105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3091105197Ssam error = EINVAL; 3092105197Ssam goto fail; 3093105197Ssam } 3094105197Ssam 3095105197Ssam sav->alg_auth = sa0->sadb_sa_auth; 3096105197Ssam sav->alg_enc = sa0->sadb_sa_encrypt; 3097105197Ssam sav->flags = sa0->sadb_sa_flags; 3098105197Ssam 3099105197Ssam /* replay window */ 3100105197Ssam if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3101105197Ssam sav->replay = (struct secreplay *) 3102119643Ssam malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 3103105197Ssam if (sav->replay == NULL) { 3104120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3105120585Ssam __func__)); 3106105197Ssam error = ENOBUFS; 3107105197Ssam goto fail; 3108105197Ssam } 3109105197Ssam if (sa0->sadb_sa_replay != 0) 3110105197Ssam sav->replay->bitmap = (caddr_t)(sav->replay+1); 3111105197Ssam sav->replay->wsize = sa0->sadb_sa_replay; 3112105197Ssam } 3113105197Ssam } 3114105197Ssam 3115105197Ssam /* Authentication keys */ 3116105197Ssam if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3117105197Ssam const struct sadb_key *key0; 3118105197Ssam int len; 3119105197Ssam 3120105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3121105197Ssam len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3122105197Ssam 3123105197Ssam error = 0; 3124105197Ssam if (len < sizeof(*key0)) { 3125105197Ssam error = EINVAL; 3126105197Ssam goto fail; 3127105197Ssam } 3128105197Ssam switch (mhp->msg->sadb_msg_satype) { 3129105197Ssam case SADB_SATYPE_AH: 3130105197Ssam case SADB_SATYPE_ESP: 3131125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3132105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3133105197Ssam sav->alg_auth != SADB_X_AALG_NULL) 3134105197Ssam error = EINVAL; 3135105197Ssam break; 3136105197Ssam case SADB_X_SATYPE_IPCOMP: 3137105197Ssam default: 3138105197Ssam error = EINVAL; 3139105197Ssam break; 3140105197Ssam } 3141105197Ssam if (error) { 3142120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3143120585Ssam __func__)); 3144105197Ssam goto fail; 3145105197Ssam } 3146105197Ssam 3147157123Sgnn sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, 3148157123Sgnn M_IPSEC_MISC); 3149157123Sgnn if (sav->key_auth == NULL ) { 3150157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3151157123Sgnn __func__)); 3152105197Ssam error = ENOBUFS; 3153105197Ssam goto fail; 3154105197Ssam } 3155105197Ssam } 3156105197Ssam 3157105197Ssam /* Encryption key */ 3158105197Ssam if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3159105197Ssam const struct sadb_key *key0; 3160105197Ssam int len; 3161105197Ssam 3162105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3163105197Ssam len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3164105197Ssam 3165105197Ssam error = 0; 3166105197Ssam if (len < sizeof(*key0)) { 3167105197Ssam error = EINVAL; 3168105197Ssam goto fail; 3169105197Ssam } 3170105197Ssam switch (mhp->msg->sadb_msg_satype) { 3171105197Ssam case SADB_SATYPE_ESP: 3172105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3173105197Ssam sav->alg_enc != SADB_EALG_NULL) { 3174105197Ssam error = EINVAL; 3175105197Ssam break; 3176105197Ssam } 3177157123Sgnn sav->key_enc = (struct seckey *)key_dup_keymsg(key0, 3178157123Sgnn len, 3179157123Sgnn M_IPSEC_MISC); 3180105197Ssam if (sav->key_enc == NULL) { 3181120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3182120585Ssam __func__)); 3183105197Ssam error = ENOBUFS; 3184105197Ssam goto fail; 3185105197Ssam } 3186105197Ssam break; 3187105197Ssam case SADB_X_SATYPE_IPCOMP: 3188105197Ssam if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3189105197Ssam error = EINVAL; 3190105197Ssam sav->key_enc = NULL; /*just in case*/ 3191105197Ssam break; 3192105197Ssam case SADB_SATYPE_AH: 3193125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3194105197Ssam default: 3195105197Ssam error = EINVAL; 3196105197Ssam break; 3197105197Ssam } 3198105197Ssam if (error) { 3199120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3200120585Ssam __func__)); 3201105197Ssam goto fail; 3202105197Ssam } 3203105197Ssam } 3204105197Ssam 3205105197Ssam /* set iv */ 3206105197Ssam sav->ivlen = 0; 3207105197Ssam 3208105197Ssam switch (mhp->msg->sadb_msg_satype) { 3209105197Ssam case SADB_SATYPE_AH: 3210105197Ssam error = xform_init(sav, XF_AH); 3211105197Ssam break; 3212105197Ssam case SADB_SATYPE_ESP: 3213105197Ssam error = xform_init(sav, XF_ESP); 3214105197Ssam break; 3215105197Ssam case SADB_X_SATYPE_IPCOMP: 3216105197Ssam error = xform_init(sav, XF_IPCOMP); 3217105197Ssam break; 3218125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3219125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3220125680Sbms break; 3221105197Ssam } 3222105197Ssam if (error) { 3223120585Ssam ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3224120585Ssam __func__, mhp->msg->sadb_msg_satype)); 3225105197Ssam goto fail; 3226105197Ssam } 3227105197Ssam 3228105197Ssam /* reset created */ 3229105197Ssam sav->created = time_second; 3230105197Ssam 3231105197Ssam /* make lifetime for CURRENT */ 3232176743Sbz sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); 3233105197Ssam if (sav->lft_c == NULL) { 3234120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3235105197Ssam error = ENOBUFS; 3236105197Ssam goto fail; 3237105197Ssam } 3238105197Ssam 3239157123Sgnn sav->lft_c->allocations = 0; 3240157123Sgnn sav->lft_c->bytes = 0; 3241157123Sgnn sav->lft_c->addtime = time_second; 3242157123Sgnn sav->lft_c->usetime = 0; 3243105197Ssam 3244105197Ssam /* lifetimes for HARD and SOFT */ 3245105197Ssam { 3246105197Ssam const struct sadb_lifetime *lft0; 3247105197Ssam 3248105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3249105197Ssam if (lft0 != NULL) { 3250105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3251105197Ssam error = EINVAL; 3252105197Ssam goto fail; 3253105197Ssam } 3254157123Sgnn sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3255105197Ssam if (sav->lft_h == NULL) { 3256120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3257105197Ssam error = ENOBUFS; 3258105197Ssam goto fail; 3259105197Ssam } 3260105197Ssam /* to be initialize ? */ 3261105197Ssam } 3262105197Ssam 3263105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3264105197Ssam if (lft0 != NULL) { 3265105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3266105197Ssam error = EINVAL; 3267105197Ssam goto fail; 3268105197Ssam } 3269157123Sgnn sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3270105197Ssam if (sav->lft_s == NULL) { 3271120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3272105197Ssam error = ENOBUFS; 3273105197Ssam goto fail; 3274105197Ssam } 3275105197Ssam /* to be initialize ? */ 3276105197Ssam } 3277105197Ssam } 3278105197Ssam 3279105197Ssam return 0; 3280105197Ssam 3281105197Ssam fail: 3282105197Ssam /* initialization */ 3283119643Ssam key_cleansav(sav); 3284105197Ssam 3285105197Ssam return error; 3286105197Ssam} 3287105197Ssam 3288105197Ssam/* 3289105197Ssam * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3290105197Ssam * OUT: 0: valid 3291105197Ssam * other: errno 3292105197Ssam */ 3293105197Ssamstatic int 3294119643Ssamkey_mature(struct secasvar *sav) 3295105197Ssam{ 3296105197Ssam int error; 3297105197Ssam 3298105197Ssam /* check SPI value */ 3299105197Ssam switch (sav->sah->saidx.proto) { 3300105197Ssam case IPPROTO_ESP: 3301105197Ssam case IPPROTO_AH: 3302170823Sbz /* 3303170823Sbz * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values 3304170823Sbz * 1-255 reserved by IANA for future use, 3305170823Sbz * 0 for implementation specific, local use. 3306170823Sbz */ 3307170823Sbz if (ntohl(sav->spi) <= 255) { 3308120585Ssam ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3309120585Ssam __func__, (u_int32_t)ntohl(sav->spi))); 3310105197Ssam return EINVAL; 3311105197Ssam } 3312105197Ssam break; 3313105197Ssam } 3314105197Ssam 3315105197Ssam /* check satype */ 3316105197Ssam switch (sav->sah->saidx.proto) { 3317105197Ssam case IPPROTO_ESP: 3318105197Ssam /* check flags */ 3319105197Ssam if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3320105197Ssam (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3321120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3322120585Ssam "given to old-esp.\n", __func__)); 3323105197Ssam return EINVAL; 3324105197Ssam } 3325105197Ssam error = xform_init(sav, XF_ESP); 3326105197Ssam break; 3327105197Ssam case IPPROTO_AH: 3328105197Ssam /* check flags */ 3329105197Ssam if (sav->flags & SADB_X_EXT_DERIV) { 3330120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3331120585Ssam "given to AH SA.\n", __func__)); 3332105197Ssam return EINVAL; 3333105197Ssam } 3334105197Ssam if (sav->alg_enc != SADB_EALG_NONE) { 3335120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3336120585Ssam "mismated.\n", __func__)); 3337105197Ssam return(EINVAL); 3338105197Ssam } 3339105197Ssam error = xform_init(sav, XF_AH); 3340105197Ssam break; 3341105197Ssam case IPPROTO_IPCOMP: 3342105197Ssam if (sav->alg_auth != SADB_AALG_NONE) { 3343120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3344120585Ssam "mismated.\n", __func__)); 3345105197Ssam return(EINVAL); 3346105197Ssam } 3347105197Ssam if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3348105197Ssam && ntohl(sav->spi) >= 0x10000) { 3349120585Ssam ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3350120585Ssam __func__)); 3351105197Ssam return(EINVAL); 3352105197Ssam } 3353105197Ssam error = xform_init(sav, XF_IPCOMP); 3354105197Ssam break; 3355125680Sbms case IPPROTO_TCP: 3356125680Sbms if (sav->alg_enc != SADB_EALG_NONE) { 3357125680Sbms ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3358125680Sbms "mismated.\n", __func__)); 3359125680Sbms return(EINVAL); 3360125680Sbms } 3361125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3362125680Sbms break; 3363105197Ssam default: 3364120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3365105197Ssam error = EPROTONOSUPPORT; 3366105197Ssam break; 3367105197Ssam } 3368119643Ssam if (error == 0) { 3369120585Ssam SAHTREE_LOCK(); 3370105197Ssam key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3371120585Ssam SAHTREE_UNLOCK(); 3372119643Ssam } 3373105197Ssam return (error); 3374105197Ssam} 3375105197Ssam 3376105197Ssam/* 3377105197Ssam * subroutine for SADB_GET and SADB_DUMP. 3378105197Ssam */ 3379105197Ssamstatic struct mbuf * 3380189004Srdivackykey_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3381189004Srdivacky u_int32_t seq, u_int32_t pid) 3382105197Ssam{ 3383105197Ssam struct mbuf *result = NULL, *tres = NULL, *m; 3384105197Ssam int i; 3385105197Ssam int dumporder[] = { 3386105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 3387105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3388105197Ssam SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3389105197Ssam SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3390105197Ssam SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3391105197Ssam SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3392194062Svanhu#ifdef IPSEC_NAT_T 3393194062Svanhu SADB_X_EXT_NAT_T_TYPE, 3394194062Svanhu SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3395194062Svanhu SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3396194062Svanhu SADB_X_EXT_NAT_T_FRAG, 3397194062Svanhu#endif 3398105197Ssam }; 3399105197Ssam 3400105197Ssam m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3401105197Ssam if (m == NULL) 3402105197Ssam goto fail; 3403105197Ssam result = m; 3404105197Ssam 3405105197Ssam for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3406105197Ssam m = NULL; 3407105197Ssam switch (dumporder[i]) { 3408105197Ssam case SADB_EXT_SA: 3409105197Ssam m = key_setsadbsa(sav); 3410105197Ssam if (!m) 3411105197Ssam goto fail; 3412105197Ssam break; 3413105197Ssam 3414105197Ssam case SADB_X_EXT_SA2: 3415105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 3416105197Ssam sav->replay ? sav->replay->count : 0, 3417105197Ssam sav->sah->saidx.reqid); 3418105197Ssam if (!m) 3419105197Ssam goto fail; 3420105197Ssam break; 3421105197Ssam 3422105197Ssam case SADB_EXT_ADDRESS_SRC: 3423105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3424105197Ssam &sav->sah->saidx.src.sa, 3425105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3426105197Ssam if (!m) 3427105197Ssam goto fail; 3428105197Ssam break; 3429105197Ssam 3430105197Ssam case SADB_EXT_ADDRESS_DST: 3431105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3432105197Ssam &sav->sah->saidx.dst.sa, 3433105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3434105197Ssam if (!m) 3435105197Ssam goto fail; 3436105197Ssam break; 3437105197Ssam 3438105197Ssam case SADB_EXT_KEY_AUTH: 3439105197Ssam if (!sav->key_auth) 3440105197Ssam continue; 3441157123Sgnn m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH); 3442157123Sgnn if (!m) 3443157123Sgnn goto fail; 3444105197Ssam break; 3445105197Ssam 3446105197Ssam case SADB_EXT_KEY_ENCRYPT: 3447105197Ssam if (!sav->key_enc) 3448105197Ssam continue; 3449157123Sgnn m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT); 3450157123Sgnn if (!m) 3451157123Sgnn goto fail; 3452105197Ssam break; 3453105197Ssam 3454105197Ssam case SADB_EXT_LIFETIME_CURRENT: 3455105197Ssam if (!sav->lft_c) 3456105197Ssam continue; 3457157123Sgnn m = key_setlifetime(sav->lft_c, 3458157123Sgnn SADB_EXT_LIFETIME_CURRENT); 3459157123Sgnn if (!m) 3460157123Sgnn goto fail; 3461105197Ssam break; 3462105197Ssam 3463105197Ssam case SADB_EXT_LIFETIME_HARD: 3464105197Ssam if (!sav->lft_h) 3465105197Ssam continue; 3466157123Sgnn m = key_setlifetime(sav->lft_h, 3467157123Sgnn SADB_EXT_LIFETIME_HARD); 3468157123Sgnn if (!m) 3469157123Sgnn goto fail; 3470105197Ssam break; 3471105197Ssam 3472105197Ssam case SADB_EXT_LIFETIME_SOFT: 3473105197Ssam if (!sav->lft_s) 3474105197Ssam continue; 3475177554Sbz m = key_setlifetime(sav->lft_s, 3476157123Sgnn SADB_EXT_LIFETIME_SOFT); 3477157123Sgnn 3478157123Sgnn if (!m) 3479157123Sgnn goto fail; 3480105197Ssam break; 3481105197Ssam 3482194062Svanhu#ifdef IPSEC_NAT_T 3483194062Svanhu case SADB_X_EXT_NAT_T_TYPE: 3484194062Svanhu m = key_setsadbxtype(sav->natt_type); 3485194062Svanhu if (!m) 3486194062Svanhu goto fail; 3487194062Svanhu break; 3488194062Svanhu 3489194062Svanhu case SADB_X_EXT_NAT_T_DPORT: 3490194062Svanhu m = key_setsadbxport( 3491194062Svanhu KEY_PORTFROMSADDR(&sav->sah->saidx.dst), 3492194062Svanhu SADB_X_EXT_NAT_T_DPORT); 3493194062Svanhu if (!m) 3494194062Svanhu goto fail; 3495194062Svanhu break; 3496194062Svanhu 3497194062Svanhu case SADB_X_EXT_NAT_T_SPORT: 3498194062Svanhu m = key_setsadbxport( 3499194062Svanhu KEY_PORTFROMSADDR(&sav->sah->saidx.src), 3500194062Svanhu SADB_X_EXT_NAT_T_SPORT); 3501194062Svanhu if (!m) 3502194062Svanhu goto fail; 3503194062Svanhu break; 3504194062Svanhu 3505194062Svanhu case SADB_X_EXT_NAT_T_OAI: 3506194062Svanhu case SADB_X_EXT_NAT_T_OAR: 3507194062Svanhu case SADB_X_EXT_NAT_T_FRAG: 3508194062Svanhu /* We do not (yet) support those. */ 3509194062Svanhu continue; 3510194062Svanhu#endif 3511194062Svanhu 3512105197Ssam case SADB_EXT_ADDRESS_PROXY: 3513105197Ssam case SADB_EXT_IDENTITY_SRC: 3514105197Ssam case SADB_EXT_IDENTITY_DST: 3515105197Ssam /* XXX: should we brought from SPD ? */ 3516105197Ssam case SADB_EXT_SENSITIVITY: 3517105197Ssam default: 3518105197Ssam continue; 3519105197Ssam } 3520105197Ssam 3521157123Sgnn if (!m) 3522105197Ssam goto fail; 3523105197Ssam if (tres) 3524105197Ssam m_cat(m, tres); 3525105197Ssam tres = m; 3526157123Sgnn 3527105197Ssam } 3528105197Ssam 3529105197Ssam m_cat(result, tres); 3530105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 3531105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 3532105197Ssam if (result == NULL) 3533105197Ssam goto fail; 3534105197Ssam } 3535105197Ssam 3536105197Ssam result->m_pkthdr.len = 0; 3537105197Ssam for (m = result; m; m = m->m_next) 3538105197Ssam result->m_pkthdr.len += m->m_len; 3539105197Ssam 3540105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 3541105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 3542105197Ssam 3543105197Ssam return result; 3544105197Ssam 3545105197Ssamfail: 3546105197Ssam m_freem(result); 3547105197Ssam m_freem(tres); 3548105197Ssam return NULL; 3549105197Ssam} 3550105197Ssam 3551105197Ssam/* 3552105197Ssam * set data into sadb_msg. 3553105197Ssam */ 3554105197Ssamstatic struct mbuf * 3555189004Srdivackykey_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, 3556189004Srdivacky pid_t pid, u_int16_t reserved) 3557105197Ssam{ 3558105197Ssam struct mbuf *m; 3559105197Ssam struct sadb_msg *p; 3560105197Ssam int len; 3561105197Ssam 3562105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3563105197Ssam if (len > MCLBYTES) 3564105197Ssam return NULL; 3565111119Simp MGETHDR(m, M_DONTWAIT, MT_DATA); 3566105197Ssam if (m && len > MHLEN) { 3567111119Simp MCLGET(m, M_DONTWAIT); 3568105197Ssam if ((m->m_flags & M_EXT) == 0) { 3569105197Ssam m_freem(m); 3570105197Ssam m = NULL; 3571105197Ssam } 3572105197Ssam } 3573105197Ssam if (!m) 3574105197Ssam return NULL; 3575105197Ssam m->m_pkthdr.len = m->m_len = len; 3576105197Ssam m->m_next = NULL; 3577105197Ssam 3578105197Ssam p = mtod(m, struct sadb_msg *); 3579105197Ssam 3580105197Ssam bzero(p, len); 3581105197Ssam p->sadb_msg_version = PF_KEY_V2; 3582105197Ssam p->sadb_msg_type = type; 3583105197Ssam p->sadb_msg_errno = 0; 3584105197Ssam p->sadb_msg_satype = satype; 3585105197Ssam p->sadb_msg_len = PFKEY_UNIT64(tlen); 3586105197Ssam p->sadb_msg_reserved = reserved; 3587105197Ssam p->sadb_msg_seq = seq; 3588105197Ssam p->sadb_msg_pid = (u_int32_t)pid; 3589105197Ssam 3590105197Ssam return m; 3591105197Ssam} 3592105197Ssam 3593105197Ssam/* 3594105197Ssam * copy secasvar data into sadb_address. 3595105197Ssam */ 3596105197Ssamstatic struct mbuf * 3597105197Ssamkey_setsadbsa(sav) 3598105197Ssam struct secasvar *sav; 3599105197Ssam{ 3600105197Ssam struct mbuf *m; 3601105197Ssam struct sadb_sa *p; 3602105197Ssam int len; 3603105197Ssam 3604105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3605105197Ssam m = key_alloc_mbuf(len); 3606105197Ssam if (!m || m->m_next) { /*XXX*/ 3607105197Ssam if (m) 3608105197Ssam m_freem(m); 3609105197Ssam return NULL; 3610105197Ssam } 3611105197Ssam 3612105197Ssam p = mtod(m, struct sadb_sa *); 3613105197Ssam 3614105197Ssam bzero(p, len); 3615105197Ssam p->sadb_sa_len = PFKEY_UNIT64(len); 3616105197Ssam p->sadb_sa_exttype = SADB_EXT_SA; 3617105197Ssam p->sadb_sa_spi = sav->spi; 3618105197Ssam p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3619105197Ssam p->sadb_sa_state = sav->state; 3620105197Ssam p->sadb_sa_auth = sav->alg_auth; 3621105197Ssam p->sadb_sa_encrypt = sav->alg_enc; 3622105197Ssam p->sadb_sa_flags = sav->flags; 3623105197Ssam 3624105197Ssam return m; 3625105197Ssam} 3626105197Ssam 3627105197Ssam/* 3628105197Ssam * set data into sadb_address. 3629105197Ssam */ 3630105197Ssamstatic struct mbuf * 3631189004Srdivackykey_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto) 3632105197Ssam{ 3633105197Ssam struct mbuf *m; 3634105197Ssam struct sadb_address *p; 3635105197Ssam size_t len; 3636105197Ssam 3637105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3638105197Ssam PFKEY_ALIGN8(saddr->sa_len); 3639105197Ssam m = key_alloc_mbuf(len); 3640105197Ssam if (!m || m->m_next) { /*XXX*/ 3641105197Ssam if (m) 3642105197Ssam m_freem(m); 3643105197Ssam return NULL; 3644105197Ssam } 3645105197Ssam 3646105197Ssam p = mtod(m, struct sadb_address *); 3647105197Ssam 3648105197Ssam bzero(p, len); 3649105197Ssam p->sadb_address_len = PFKEY_UNIT64(len); 3650105197Ssam p->sadb_address_exttype = exttype; 3651105197Ssam p->sadb_address_proto = ul_proto; 3652105197Ssam if (prefixlen == FULLMASK) { 3653105197Ssam switch (saddr->sa_family) { 3654105197Ssam case AF_INET: 3655105197Ssam prefixlen = sizeof(struct in_addr) << 3; 3656105197Ssam break; 3657105197Ssam case AF_INET6: 3658105197Ssam prefixlen = sizeof(struct in6_addr) << 3; 3659105197Ssam break; 3660105197Ssam default: 3661105197Ssam ; /*XXX*/ 3662105197Ssam } 3663105197Ssam } 3664105197Ssam p->sadb_address_prefixlen = prefixlen; 3665105197Ssam p->sadb_address_reserved = 0; 3666105197Ssam 3667105197Ssam bcopy(saddr, 3668105197Ssam mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3669105197Ssam saddr->sa_len); 3670105197Ssam 3671105197Ssam return m; 3672105197Ssam} 3673105197Ssam 3674105197Ssam/* 3675105197Ssam * set data into sadb_x_sa2. 3676105197Ssam */ 3677105197Ssamstatic struct mbuf * 3678189004Srdivackykey_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) 3679105197Ssam{ 3680105197Ssam struct mbuf *m; 3681105197Ssam struct sadb_x_sa2 *p; 3682105197Ssam size_t len; 3683105197Ssam 3684105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3685105197Ssam m = key_alloc_mbuf(len); 3686105197Ssam if (!m || m->m_next) { /*XXX*/ 3687105197Ssam if (m) 3688105197Ssam m_freem(m); 3689105197Ssam return NULL; 3690105197Ssam } 3691105197Ssam 3692105197Ssam p = mtod(m, struct sadb_x_sa2 *); 3693105197Ssam 3694105197Ssam bzero(p, len); 3695105197Ssam p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3696105197Ssam p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3697105197Ssam p->sadb_x_sa2_mode = mode; 3698105197Ssam p->sadb_x_sa2_reserved1 = 0; 3699105197Ssam p->sadb_x_sa2_reserved2 = 0; 3700105197Ssam p->sadb_x_sa2_sequence = seq; 3701105197Ssam p->sadb_x_sa2_reqid = reqid; 3702105197Ssam 3703105197Ssam return m; 3704105197Ssam} 3705105197Ssam 3706194062Svanhu#ifdef IPSEC_NAT_T 3707105197Ssam/* 3708194062Svanhu * Set a type in sadb_x_nat_t_type. 3709194062Svanhu */ 3710194062Svanhustatic struct mbuf * 3711194062Svanhukey_setsadbxtype(u_int16_t type) 3712194062Svanhu{ 3713194062Svanhu struct mbuf *m; 3714194062Svanhu size_t len; 3715194062Svanhu struct sadb_x_nat_t_type *p; 3716194062Svanhu 3717194062Svanhu len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3718194062Svanhu 3719194062Svanhu m = key_alloc_mbuf(len); 3720194062Svanhu if (!m || m->m_next) { /*XXX*/ 3721194062Svanhu if (m) 3722194062Svanhu m_freem(m); 3723194062Svanhu return (NULL); 3724194062Svanhu } 3725194062Svanhu 3726194062Svanhu p = mtod(m, struct sadb_x_nat_t_type *); 3727194062Svanhu 3728194062Svanhu bzero(p, len); 3729194062Svanhu p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3730194062Svanhu p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3731194062Svanhu p->sadb_x_nat_t_type_type = type; 3732194062Svanhu 3733194062Svanhu return (m); 3734194062Svanhu} 3735194062Svanhu/* 3736194062Svanhu * Set a port in sadb_x_nat_t_port. 3737194062Svanhu * In contrast to default RFC 2367 behaviour, port is in network byte order. 3738194062Svanhu */ 3739194062Svanhustatic struct mbuf * 3740194062Svanhukey_setsadbxport(u_int16_t port, u_int16_t type) 3741194062Svanhu{ 3742194062Svanhu struct mbuf *m; 3743194062Svanhu size_t len; 3744194062Svanhu struct sadb_x_nat_t_port *p; 3745194062Svanhu 3746194062Svanhu len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3747194062Svanhu 3748194062Svanhu m = key_alloc_mbuf(len); 3749194062Svanhu if (!m || m->m_next) { /*XXX*/ 3750194062Svanhu if (m) 3751194062Svanhu m_freem(m); 3752194062Svanhu return (NULL); 3753194062Svanhu } 3754194062Svanhu 3755194062Svanhu p = mtod(m, struct sadb_x_nat_t_port *); 3756194062Svanhu 3757194062Svanhu bzero(p, len); 3758194062Svanhu p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3759194062Svanhu p->sadb_x_nat_t_port_exttype = type; 3760194062Svanhu p->sadb_x_nat_t_port_port = port; 3761194062Svanhu 3762194062Svanhu return (m); 3763194062Svanhu} 3764194062Svanhu 3765194062Svanhu/* 3766194062Svanhu * Get port from sockaddr. Port is in network byte order. 3767194062Svanhu */ 3768194062Svanhuu_int16_t 3769194062Svanhukey_portfromsaddr(struct sockaddr *sa) 3770194062Svanhu{ 3771194062Svanhu 3772194062Svanhu switch (sa->sa_family) { 3773194062Svanhu#ifdef INET 3774194062Svanhu case AF_INET: 3775194062Svanhu return ((struct sockaddr_in *)sa)->sin_port; 3776194062Svanhu#endif 3777194062Svanhu#ifdef INET6 3778194062Svanhu case AF_INET6: 3779194062Svanhu return ((struct sockaddr_in6 *)sa)->sin6_port; 3780194062Svanhu#endif 3781194062Svanhu } 3782194062Svanhu KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3783194062Svanhu printf("DP %s unexpected address family %d\n", 3784194062Svanhu __func__, sa->sa_family)); 3785194062Svanhu return (0); 3786194062Svanhu} 3787194062Svanhu#endif /* IPSEC_NAT_T */ 3788194062Svanhu 3789194062Svanhu/* 3790194062Svanhu * Set port in struct sockaddr. Port is in network byte order. 3791194062Svanhu */ 3792194062Svanhustatic void 3793194062Svanhukey_porttosaddr(struct sockaddr *sa, u_int16_t port) 3794194062Svanhu{ 3795194062Svanhu 3796194062Svanhu switch (sa->sa_family) { 3797194062Svanhu#ifdef INET 3798194062Svanhu case AF_INET: 3799194062Svanhu ((struct sockaddr_in *)sa)->sin_port = port; 3800194062Svanhu break; 3801194062Svanhu#endif 3802194062Svanhu#ifdef INET6 3803194062Svanhu case AF_INET6: 3804194062Svanhu ((struct sockaddr_in6 *)sa)->sin6_port = port; 3805194062Svanhu break; 3806194062Svanhu#endif 3807194062Svanhu default: 3808194062Svanhu ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n", 3809194062Svanhu __func__, sa->sa_family)); 3810194062Svanhu break; 3811194062Svanhu } 3812194062Svanhu} 3813194062Svanhu 3814194062Svanhu/* 3815105197Ssam * set data into sadb_x_policy 3816105197Ssam */ 3817105197Ssamstatic struct mbuf * 3818189004Srdivackykey_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3819105197Ssam{ 3820105197Ssam struct mbuf *m; 3821105197Ssam struct sadb_x_policy *p; 3822105197Ssam size_t len; 3823105197Ssam 3824105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3825105197Ssam m = key_alloc_mbuf(len); 3826105197Ssam if (!m || m->m_next) { /*XXX*/ 3827105197Ssam if (m) 3828105197Ssam m_freem(m); 3829105197Ssam return NULL; 3830105197Ssam } 3831105197Ssam 3832105197Ssam p = mtod(m, struct sadb_x_policy *); 3833105197Ssam 3834105197Ssam bzero(p, len); 3835105197Ssam p->sadb_x_policy_len = PFKEY_UNIT64(len); 3836105197Ssam p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3837105197Ssam p->sadb_x_policy_type = type; 3838105197Ssam p->sadb_x_policy_dir = dir; 3839105197Ssam p->sadb_x_policy_id = id; 3840105197Ssam 3841105197Ssam return m; 3842105197Ssam} 3843105197Ssam 3844105197Ssam/* %%% utilities */ 3845157123Sgnn/* Take a key message (sadb_key) from the socket and turn it into one 3846157123Sgnn * of the kernel's key structures (seckey). 3847157123Sgnn * 3848157123Sgnn * IN: pointer to the src 3849157123Sgnn * OUT: NULL no more memory 3850105197Ssam */ 3851157123Sgnnstruct seckey * 3852157123Sgnnkey_dup_keymsg(const struct sadb_key *src, u_int len, 3853157123Sgnn struct malloc_type *type) 3854105197Ssam{ 3855157123Sgnn struct seckey *dst; 3856157123Sgnn dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); 3857157123Sgnn if (dst != NULL) { 3858157123Sgnn dst->bits = src->sadb_key_bits; 3859157123Sgnn dst->key_data = (char *)malloc(len, type, M_NOWAIT); 3860157123Sgnn if (dst->key_data != NULL) { 3861157123Sgnn bcopy((const char *)src + sizeof(struct sadb_key), 3862157123Sgnn dst->key_data, len); 3863157123Sgnn } else { 3864157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3865157123Sgnn __func__)); 3866157123Sgnn free(dst, type); 3867157123Sgnn dst = NULL; 3868157123Sgnn } 3869157123Sgnn } else { 3870157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3871157123Sgnn __func__)); 3872105197Ssam 3873157123Sgnn } 3874157123Sgnn return dst; 3875157123Sgnn} 3876157123Sgnn 3877157123Sgnn/* Take a lifetime message (sadb_lifetime) passed in on a socket and 3878157123Sgnn * turn it into one of the kernel's lifetime structures (seclifetime). 3879157123Sgnn * 3880157123Sgnn * IN: pointer to the destination, source and malloc type 3881157123Sgnn * OUT: NULL, no more memory 3882157123Sgnn */ 3883157123Sgnn 3884157123Sgnnstatic struct seclifetime * 3885157123Sgnnkey_dup_lifemsg(const struct sadb_lifetime *src, 3886157123Sgnn struct malloc_type *type) 3887157123Sgnn{ 3888157123Sgnn struct seclifetime *dst = NULL; 3889157123Sgnn 3890157123Sgnn dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), 3891157123Sgnn type, M_NOWAIT); 3892157123Sgnn if (dst == NULL) { 3893119643Ssam /* XXX counter */ 3894120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3895157123Sgnn } else { 3896157123Sgnn dst->allocations = src->sadb_lifetime_allocations; 3897157123Sgnn dst->bytes = src->sadb_lifetime_bytes; 3898157123Sgnn dst->addtime = src->sadb_lifetime_addtime; 3899157123Sgnn dst->usetime = src->sadb_lifetime_usetime; 3900157123Sgnn } 3901157123Sgnn return dst; 3902105197Ssam} 3903105197Ssam 3904105197Ssam/* compare my own address 3905105197Ssam * OUT: 1: true, i.e. my address. 3906105197Ssam * 0: false 3907105197Ssam */ 3908105197Ssamint 3909105197Ssamkey_ismyaddr(sa) 3910105197Ssam struct sockaddr *sa; 3911105197Ssam{ 3912105197Ssam#ifdef INET 3913105197Ssam struct sockaddr_in *sin; 3914105197Ssam struct in_ifaddr *ia; 3915105197Ssam#endif 3916105197Ssam 3917120585Ssam IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3918105197Ssam 3919105197Ssam switch (sa->sa_family) { 3920105197Ssam#ifdef INET 3921105197Ssam case AF_INET: 3922105197Ssam sin = (struct sockaddr_in *)sa; 3923194951Srwatson IN_IFADDR_RLOCK(); 3924181803Sbz for (ia = V_in_ifaddrhead.tqh_first; ia; 3925105197Ssam ia = ia->ia_link.tqe_next) 3926105197Ssam { 3927105197Ssam if (sin->sin_family == ia->ia_addr.sin_family && 3928105197Ssam sin->sin_len == ia->ia_addr.sin_len && 3929105197Ssam sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3930105197Ssam { 3931194951Srwatson IN_IFADDR_RUNLOCK(); 3932105197Ssam return 1; 3933105197Ssam } 3934105197Ssam } 3935194951Srwatson IN_IFADDR_RUNLOCK(); 3936105197Ssam break; 3937105197Ssam#endif 3938105197Ssam#ifdef INET6 3939105197Ssam case AF_INET6: 3940105197Ssam return key_ismyaddr6((struct sockaddr_in6 *)sa); 3941105197Ssam#endif 3942105197Ssam } 3943105197Ssam 3944105197Ssam return 0; 3945105197Ssam} 3946105197Ssam 3947105197Ssam#ifdef INET6 3948105197Ssam/* 3949105197Ssam * compare my own address for IPv6. 3950105197Ssam * 1: ours 3951105197Ssam * 0: other 3952105197Ssam * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3953105197Ssam */ 3954105197Ssam#include <netinet6/in6_var.h> 3955105197Ssam 3956105197Ssamstatic int 3957105197Ssamkey_ismyaddr6(sin6) 3958105197Ssam struct sockaddr_in6 *sin6; 3959105197Ssam{ 3960105197Ssam struct in6_ifaddr *ia; 3961191663Sbms#if 0 3962105197Ssam struct in6_multi *in6m; 3963191663Sbms#endif 3964105197Ssam 3965194971Srwatson IN6_IFADDR_RLOCK(); 3966194907Srwatson TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 3967105197Ssam if (key_sockaddrcmp((struct sockaddr *)&sin6, 3968194971Srwatson (struct sockaddr *)&ia->ia_addr, 0) == 0) { 3969194971Srwatson IN6_IFADDR_RUNLOCK(); 3970105197Ssam return 1; 3971194971Srwatson } 3972105197Ssam 3973191663Sbms#if 0 3974105197Ssam /* 3975105197Ssam * XXX Multicast 3976105197Ssam * XXX why do we care about multlicast here while we don't care 3977105197Ssam * about IPv4 multicast?? 3978105197Ssam * XXX scope 3979105197Ssam */ 3980105197Ssam in6m = NULL; 3981105197Ssam IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3982194971Srwatson if (in6m) { 3983194971Srwatson IN6_IFADDR_RUNLOCK(); 3984105197Ssam return 1; 3985194971Srwatson } 3986191663Sbms#endif 3987105197Ssam } 3988194971Srwatson IN6_IFADDR_RUNLOCK(); 3989105197Ssam 3990105197Ssam /* loopback, just for safety */ 3991105197Ssam if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3992105197Ssam return 1; 3993105197Ssam 3994105197Ssam return 0; 3995105197Ssam} 3996105197Ssam#endif /*INET6*/ 3997105197Ssam 3998105197Ssam/* 3999105197Ssam * compare two secasindex structure. 4000105197Ssam * flag can specify to compare 2 saidxes. 4001105197Ssam * compare two secasindex structure without both mode and reqid. 4002105197Ssam * don't compare port. 4003105197Ssam * IN: 4004105197Ssam * saidx0: source, it can be in SAD. 4005105197Ssam * saidx1: object. 4006105197Ssam * OUT: 4007105197Ssam * 1 : equal 4008105197Ssam * 0 : not equal 4009105197Ssam */ 4010105197Ssamstatic int 4011105197Ssamkey_cmpsaidx( 4012105197Ssam const struct secasindex *saidx0, 4013105197Ssam const struct secasindex *saidx1, 4014105197Ssam int flag) 4015105197Ssam{ 4016194062Svanhu int chkport = 0; 4017194062Svanhu 4018105197Ssam /* sanity */ 4019105197Ssam if (saidx0 == NULL && saidx1 == NULL) 4020105197Ssam return 1; 4021105197Ssam 4022105197Ssam if (saidx0 == NULL || saidx1 == NULL) 4023105197Ssam return 0; 4024105197Ssam 4025105197Ssam if (saidx0->proto != saidx1->proto) 4026105197Ssam return 0; 4027105197Ssam 4028105197Ssam if (flag == CMP_EXACTLY) { 4029105197Ssam if (saidx0->mode != saidx1->mode) 4030105197Ssam return 0; 4031105197Ssam if (saidx0->reqid != saidx1->reqid) 4032105197Ssam return 0; 4033105197Ssam if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4034105197Ssam bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4035105197Ssam return 0; 4036105197Ssam } else { 4037105197Ssam 4038105197Ssam /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4039105197Ssam if (flag == CMP_MODE_REQID 4040105197Ssam ||flag == CMP_REQID) { 4041105197Ssam /* 4042105197Ssam * If reqid of SPD is non-zero, unique SA is required. 4043105197Ssam * The result must be of same reqid in this case. 4044105197Ssam */ 4045105197Ssam if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4046105197Ssam return 0; 4047105197Ssam } 4048105197Ssam 4049105197Ssam if (flag == CMP_MODE_REQID) { 4050105197Ssam if (saidx0->mode != IPSEC_MODE_ANY 4051105197Ssam && saidx0->mode != saidx1->mode) 4052105197Ssam return 0; 4053105197Ssam } 4054105197Ssam 4055194062Svanhu#ifdef IPSEC_NAT_T 4056194062Svanhu /* 4057194062Svanhu * If NAT-T is enabled, check ports for tunnel mode. 4058194062Svanhu * Do not check ports if they are set to zero in the SPD. 4059194062Svanhu * Also do not do it for transport mode, as there is no 4060194062Svanhu * port information available in the SP. 4061194062Svanhu */ 4062194062Svanhu if (saidx1->mode == IPSEC_MODE_TUNNEL && 4063194062Svanhu saidx1->src.sa.sa_family == AF_INET && 4064194062Svanhu saidx1->dst.sa.sa_family == AF_INET && 4065194062Svanhu ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4066194062Svanhu ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) 4067194062Svanhu chkport = 1; 4068194062Svanhu#endif /* IPSEC_NAT_T */ 4069194062Svanhu 4070194062Svanhu if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4071105197Ssam return 0; 4072105197Ssam } 4073194062Svanhu if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4074105197Ssam return 0; 4075105197Ssam } 4076105197Ssam } 4077105197Ssam 4078105197Ssam return 1; 4079105197Ssam} 4080105197Ssam 4081105197Ssam/* 4082105197Ssam * compare two secindex structure exactly. 4083105197Ssam * IN: 4084105197Ssam * spidx0: source, it is often in SPD. 4085105197Ssam * spidx1: object, it is often from PFKEY message. 4086105197Ssam * OUT: 4087105197Ssam * 1 : equal 4088105197Ssam * 0 : not equal 4089105197Ssam */ 4090105197Ssamstatic int 4091105197Ssamkey_cmpspidx_exactly( 4092105197Ssam struct secpolicyindex *spidx0, 4093105197Ssam struct secpolicyindex *spidx1) 4094105197Ssam{ 4095105197Ssam /* sanity */ 4096105197Ssam if (spidx0 == NULL && spidx1 == NULL) 4097105197Ssam return 1; 4098105197Ssam 4099105197Ssam if (spidx0 == NULL || spidx1 == NULL) 4100105197Ssam return 0; 4101105197Ssam 4102105197Ssam if (spidx0->prefs != spidx1->prefs 4103105197Ssam || spidx0->prefd != spidx1->prefd 4104105197Ssam || spidx0->ul_proto != spidx1->ul_proto) 4105105197Ssam return 0; 4106105197Ssam 4107105197Ssam return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4108105197Ssam key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4109105197Ssam} 4110105197Ssam 4111105197Ssam/* 4112105197Ssam * compare two secindex structure with mask. 4113105197Ssam * IN: 4114105197Ssam * spidx0: source, it is often in SPD. 4115105197Ssam * spidx1: object, it is often from IP header. 4116105197Ssam * OUT: 4117105197Ssam * 1 : equal 4118105197Ssam * 0 : not equal 4119105197Ssam */ 4120105197Ssamstatic int 4121105197Ssamkey_cmpspidx_withmask( 4122105197Ssam struct secpolicyindex *spidx0, 4123105197Ssam struct secpolicyindex *spidx1) 4124105197Ssam{ 4125105197Ssam /* sanity */ 4126105197Ssam if (spidx0 == NULL && spidx1 == NULL) 4127105197Ssam return 1; 4128105197Ssam 4129105197Ssam if (spidx0 == NULL || spidx1 == NULL) 4130105197Ssam return 0; 4131105197Ssam 4132105197Ssam if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4133105197Ssam spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4134105197Ssam spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4135105197Ssam spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4136105197Ssam return 0; 4137105197Ssam 4138105197Ssam /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4139105197Ssam if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4140105197Ssam && spidx0->ul_proto != spidx1->ul_proto) 4141105197Ssam return 0; 4142105197Ssam 4143105197Ssam switch (spidx0->src.sa.sa_family) { 4144105197Ssam case AF_INET: 4145105197Ssam if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4146105197Ssam && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4147105197Ssam return 0; 4148105197Ssam if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4149105197Ssam &spidx1->src.sin.sin_addr, spidx0->prefs)) 4150105197Ssam return 0; 4151105197Ssam break; 4152105197Ssam case AF_INET6: 4153105197Ssam if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4154105197Ssam && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4155105197Ssam return 0; 4156105197Ssam /* 4157105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 4158105197Ssam * as a wildcard scope, which matches any scope zone ID. 4159105197Ssam */ 4160105197Ssam if (spidx0->src.sin6.sin6_scope_id && 4161105197Ssam spidx1->src.sin6.sin6_scope_id && 4162105197Ssam spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4163105197Ssam return 0; 4164105197Ssam if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4165105197Ssam &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4166105197Ssam return 0; 4167105197Ssam break; 4168105197Ssam default: 4169105197Ssam /* XXX */ 4170105197Ssam if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4171105197Ssam return 0; 4172105197Ssam break; 4173105197Ssam } 4174105197Ssam 4175105197Ssam switch (spidx0->dst.sa.sa_family) { 4176105197Ssam case AF_INET: 4177105197Ssam if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4178105197Ssam && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4179105197Ssam return 0; 4180105197Ssam if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4181105197Ssam &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4182105197Ssam return 0; 4183105197Ssam break; 4184105197Ssam case AF_INET6: 4185105197Ssam if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4186105197Ssam && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4187105197Ssam return 0; 4188105197Ssam /* 4189105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 4190105197Ssam * as a wildcard scope, which matches any scope zone ID. 4191105197Ssam */ 4192130928Sbms if (spidx0->dst.sin6.sin6_scope_id && 4193130928Sbms spidx1->dst.sin6.sin6_scope_id && 4194105197Ssam spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4195105197Ssam return 0; 4196105197Ssam if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4197105197Ssam &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4198105197Ssam return 0; 4199105197Ssam break; 4200105197Ssam default: 4201105197Ssam /* XXX */ 4202105197Ssam if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4203105197Ssam return 0; 4204105197Ssam break; 4205105197Ssam } 4206105197Ssam 4207105197Ssam /* XXX Do we check other field ? e.g. flowinfo */ 4208105197Ssam 4209105197Ssam return 1; 4210105197Ssam} 4211105197Ssam 4212105197Ssam/* returns 0 on match */ 4213105197Ssamstatic int 4214105197Ssamkey_sockaddrcmp( 4215105197Ssam const struct sockaddr *sa1, 4216105197Ssam const struct sockaddr *sa2, 4217105197Ssam int port) 4218105197Ssam{ 4219105197Ssam#ifdef satosin 4220105197Ssam#undef satosin 4221105197Ssam#endif 4222105197Ssam#define satosin(s) ((const struct sockaddr_in *)s) 4223105197Ssam#ifdef satosin6 4224105197Ssam#undef satosin6 4225105197Ssam#endif 4226105197Ssam#define satosin6(s) ((const struct sockaddr_in6 *)s) 4227105197Ssam if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4228105197Ssam return 1; 4229105197Ssam 4230105197Ssam switch (sa1->sa_family) { 4231105197Ssam case AF_INET: 4232105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in)) 4233105197Ssam return 1; 4234105197Ssam if (satosin(sa1)->sin_addr.s_addr != 4235105197Ssam satosin(sa2)->sin_addr.s_addr) { 4236105197Ssam return 1; 4237105197Ssam } 4238105197Ssam if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4239105197Ssam return 1; 4240105197Ssam break; 4241105197Ssam case AF_INET6: 4242105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4243105197Ssam return 1; /*EINVAL*/ 4244105197Ssam if (satosin6(sa1)->sin6_scope_id != 4245105197Ssam satosin6(sa2)->sin6_scope_id) { 4246105197Ssam return 1; 4247105197Ssam } 4248105197Ssam if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4249105197Ssam &satosin6(sa2)->sin6_addr)) { 4250105197Ssam return 1; 4251105197Ssam } 4252105197Ssam if (port && 4253105197Ssam satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4254105197Ssam return 1; 4255105197Ssam } 4256170120Sbz break; 4257105197Ssam default: 4258105197Ssam if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4259105197Ssam return 1; 4260105197Ssam break; 4261105197Ssam } 4262105197Ssam 4263105197Ssam return 0; 4264105197Ssam#undef satosin 4265105197Ssam#undef satosin6 4266105197Ssam} 4267105197Ssam 4268105197Ssam/* 4269105197Ssam * compare two buffers with mask. 4270105197Ssam * IN: 4271105197Ssam * addr1: source 4272105197Ssam * addr2: object 4273105197Ssam * bits: Number of bits to compare 4274105197Ssam * OUT: 4275105197Ssam * 1 : equal 4276105197Ssam * 0 : not equal 4277105197Ssam */ 4278105197Ssamstatic int 4279105197Ssamkey_bbcmp(const void *a1, const void *a2, u_int bits) 4280105197Ssam{ 4281105197Ssam const unsigned char *p1 = a1; 4282105197Ssam const unsigned char *p2 = a2; 4283105197Ssam 4284105197Ssam /* XXX: This could be considerably faster if we compare a word 4285105197Ssam * at a time, but it is complicated on LSB Endian machines */ 4286105197Ssam 4287105197Ssam /* Handle null pointers */ 4288105197Ssam if (p1 == NULL || p2 == NULL) 4289105197Ssam return (p1 == p2); 4290105197Ssam 4291105197Ssam while (bits >= 8) { 4292105197Ssam if (*p1++ != *p2++) 4293105197Ssam return 0; 4294105197Ssam bits -= 8; 4295105197Ssam } 4296105197Ssam 4297105197Ssam if (bits > 0) { 4298105197Ssam u_int8_t mask = ~((1<<(8-bits))-1); 4299105197Ssam if ((*p1 & mask) != (*p2 & mask)) 4300105197Ssam return 0; 4301105197Ssam } 4302105197Ssam return 1; /* Match! */ 4303105197Ssam} 4304105197Ssam 4305119643Ssamstatic void 4306119643Ssamkey_flush_spd(time_t now) 4307105197Ssam{ 4308120585Ssam static u_int16_t sptree_scangen = 0; 4309120585Ssam u_int16_t gen = sptree_scangen++; 4310120585Ssam struct secpolicy *sp; 4311105197Ssam u_int dir; 4312105197Ssam 4313105197Ssam /* SPD */ 4314105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4315120585Ssamrestart: 4316120585Ssam SPTREE_LOCK(); 4317181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 4318120585Ssam if (sp->scangen == gen) /* previously handled */ 4319120585Ssam continue; 4320120585Ssam sp->scangen = gen; 4321192880Svanhu if (sp->state == IPSEC_SPSTATE_DEAD && 4322192880Svanhu sp->refcnt == 1) { 4323192880Svanhu /* 4324192880Svanhu * Ensure that we only decrease refcnt once, 4325192880Svanhu * when we're the last consumer. 4326192880Svanhu * Directly call SP_DELREF/key_delsp instead 4327192880Svanhu * of KEY_FREESP to avoid unlocking/relocking 4328192880Svanhu * SPTREE_LOCK before key_delsp: may refcnt 4329192880Svanhu * be increased again during that time ? 4330192880Svanhu * NB: also clean entries created by 4331192880Svanhu * key_spdflush 4332192880Svanhu */ 4333192880Svanhu SP_DELREF(sp); 4334192880Svanhu key_delsp(sp); 4335120585Ssam SPTREE_UNLOCK(); 4336120585Ssam goto restart; 4337105197Ssam } 4338105197Ssam if (sp->lifetime == 0 && sp->validtime == 0) 4339105197Ssam continue; 4340105197Ssam if ((sp->lifetime && now - sp->created > sp->lifetime) 4341105197Ssam || (sp->validtime && now - sp->lastused > sp->validtime)) { 4342105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 4343120585Ssam SPTREE_UNLOCK(); 4344105197Ssam key_spdexpire(sp); 4345120585Ssam goto restart; 4346105197Ssam } 4347105197Ssam } 4348120585Ssam SPTREE_UNLOCK(); 4349105197Ssam } 4350119643Ssam} 4351105197Ssam 4352119643Ssamstatic void 4353119643Ssamkey_flush_sad(time_t now) 4354119643Ssam{ 4355105197Ssam struct secashead *sah, *nextsah; 4356105197Ssam struct secasvar *sav, *nextsav; 4357105197Ssam 4358119643Ssam /* SAD */ 4359120585Ssam SAHTREE_LOCK(); 4360181803Sbz LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { 4361105197Ssam /* if sah has been dead, then delete it and process next sah. */ 4362105197Ssam if (sah->state == SADB_SASTATE_DEAD) { 4363105197Ssam key_delsah(sah); 4364105197Ssam continue; 4365105197Ssam } 4366105197Ssam 4367105197Ssam /* if LARVAL entry doesn't become MATURE, delete it. */ 4368120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4369190071Svanhu /* Need to also check refcnt for a larval SA ??? */ 4370181803Sbz if (now - sav->created > V_key_larval_lifetime) 4371105197Ssam KEY_FREESAV(&sav); 4372105197Ssam } 4373105197Ssam 4374105197Ssam /* 4375105197Ssam * check MATURE entry to start to send expire message 4376105197Ssam * whether or not. 4377105197Ssam */ 4378120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4379105197Ssam /* we don't need to check. */ 4380105197Ssam if (sav->lft_s == NULL) 4381105197Ssam continue; 4382105197Ssam 4383105197Ssam /* sanity check */ 4384105197Ssam if (sav->lft_c == NULL) { 4385120585Ssam ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4386120585Ssam "time, why?\n", __func__)); 4387105197Ssam continue; 4388105197Ssam } 4389105197Ssam 4390105197Ssam /* check SOFT lifetime */ 4391157123Sgnn if (sav->lft_s->addtime != 0 && 4392157123Sgnn now - sav->created > sav->lft_s->addtime) { 4393189406Svanhu key_sa_chgstate(sav, SADB_SASTATE_DYING); 4394190075Svanhu /* 4395190323Svanhu * Actually, only send expire message if 4396190323Svanhu * SA has been used, as it was done before, 4397190323Svanhu * but should we always send such message, 4398190323Svanhu * and let IKE daemon decide if it should be 4399190323Svanhu * renegotiated or not ? 4400190323Svanhu * XXX expire message will actually NOT be 4401190323Svanhu * sent if SA is only used after soft 4402190323Svanhu * lifetime has been reached, see below 4403190323Svanhu * (DYING state) 4404105197Ssam */ 4405189406Svanhu if (sav->lft_c->usetime != 0) 4406105197Ssam key_expire(sav); 4407105197Ssam } 4408105197Ssam /* check SOFT lifetime by bytes */ 4409105197Ssam /* 4410105197Ssam * XXX I don't know the way to delete this SA 4411105197Ssam * when new SA is installed. Caution when it's 4412105197Ssam * installed too big lifetime by time. 4413105197Ssam */ 4414157123Sgnn else if (sav->lft_s->bytes != 0 && 4415157123Sgnn sav->lft_s->bytes < sav->lft_c->bytes) { 4416105197Ssam 4417105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DYING); 4418105197Ssam /* 4419105197Ssam * XXX If we keep to send expire 4420105197Ssam * message in the status of 4421105197Ssam * DYING. Do remove below code. 4422105197Ssam */ 4423105197Ssam key_expire(sav); 4424105197Ssam } 4425105197Ssam } 4426105197Ssam 4427105197Ssam /* check DYING entry to change status to DEAD. */ 4428120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4429105197Ssam /* we don't need to check. */ 4430105197Ssam if (sav->lft_h == NULL) 4431105197Ssam continue; 4432105197Ssam 4433105197Ssam /* sanity check */ 4434105197Ssam if (sav->lft_c == NULL) { 4435120585Ssam ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4436120585Ssam "time, why?\n", __func__)); 4437105197Ssam continue; 4438105197Ssam } 4439105197Ssam 4440157123Sgnn if (sav->lft_h->addtime != 0 && 4441157123Sgnn now - sav->created > sav->lft_h->addtime) { 4442105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4443105197Ssam KEY_FREESAV(&sav); 4444105197Ssam } 4445105197Ssam#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4446105197Ssam else if (sav->lft_s != NULL 4447157123Sgnn && sav->lft_s->addtime != 0 4448157123Sgnn && now - sav->created > sav->lft_s->addtime) { 4449105197Ssam /* 4450105197Ssam * XXX: should be checked to be 4451105197Ssam * installed the valid SA. 4452105197Ssam */ 4453105197Ssam 4454105197Ssam /* 4455105197Ssam * If there is no SA then sending 4456105197Ssam * expire message. 4457105197Ssam */ 4458105197Ssam key_expire(sav); 4459105197Ssam } 4460105197Ssam#endif 4461105197Ssam /* check HARD lifetime by bytes */ 4462157123Sgnn else if (sav->lft_h->bytes != 0 && 4463157123Sgnn sav->lft_h->bytes < sav->lft_c->bytes) { 4464105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4465105197Ssam KEY_FREESAV(&sav); 4466105197Ssam } 4467105197Ssam } 4468105197Ssam 4469105197Ssam /* delete entry in DEAD */ 4470120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4471105197Ssam /* sanity check */ 4472105197Ssam if (sav->state != SADB_SASTATE_DEAD) { 4473120585Ssam ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4474120585Ssam "(queue: %d SA: %d): kill it anyway\n", 4475120585Ssam __func__, 4476105197Ssam SADB_SASTATE_DEAD, sav->state)); 4477105197Ssam } 4478105197Ssam /* 4479105197Ssam * do not call key_freesav() here. 4480105197Ssam * sav should already be freed, and sav->refcnt 4481105197Ssam * shows other references to sav 4482105197Ssam * (such as from SPD). 4483105197Ssam */ 4484105197Ssam } 4485105197Ssam } 4486120585Ssam SAHTREE_UNLOCK(); 4487119643Ssam} 4488105197Ssam 4489119643Ssamstatic void 4490119643Ssamkey_flush_acq(time_t now) 4491119643Ssam{ 4492105197Ssam struct secacq *acq, *nextacq; 4493105197Ssam 4494119643Ssam /* ACQ tree */ 4495120585Ssam ACQ_LOCK(); 4496181803Sbz for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 4497105197Ssam nextacq = LIST_NEXT(acq, chain); 4498181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4499105197Ssam && __LIST_CHAINED(acq)) { 4500105197Ssam LIST_REMOVE(acq, chain); 4501119643Ssam free(acq, M_IPSEC_SAQ); 4502105197Ssam } 4503105197Ssam } 4504120585Ssam ACQ_UNLOCK(); 4505119643Ssam} 4506105197Ssam 4507119643Ssamstatic void 4508119643Ssamkey_flush_spacq(time_t now) 4509119643Ssam{ 4510105197Ssam struct secspacq *acq, *nextacq; 4511105197Ssam 4512119643Ssam /* SP ACQ tree */ 4513120585Ssam SPACQ_LOCK(); 4514181803Sbz for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 4515105197Ssam nextacq = LIST_NEXT(acq, chain); 4516181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4517105197Ssam && __LIST_CHAINED(acq)) { 4518105197Ssam LIST_REMOVE(acq, chain); 4519119643Ssam free(acq, M_IPSEC_SAQ); 4520105197Ssam } 4521105197Ssam } 4522120585Ssam SPACQ_UNLOCK(); 4523119643Ssam} 4524105197Ssam 4525119643Ssam/* 4526119643Ssam * time handler. 4527119643Ssam * scanning SPD and SAD to check status for each entries, 4528119643Ssam * and do to remove or to expire. 4529119643Ssam * XXX: year 2038 problem may remain. 4530119643Ssam */ 4531119643Ssamvoid 4532119643Ssamkey_timehandler(void) 4533119643Ssam{ 4534183550Szec VNET_ITERATOR_DECL(vnet_iter); 4535119643Ssam time_t now = time_second; 4536105197Ssam 4537195760Srwatson VNET_LIST_RLOCK_NOSLEEP(); 4538183550Szec VNET_FOREACH(vnet_iter) { 4539183550Szec CURVNET_SET(vnet_iter); 4540183550Szec key_flush_spd(now); 4541183550Szec key_flush_sad(now); 4542183550Szec key_flush_acq(now); 4543183550Szec key_flush_spacq(now); 4544183550Szec CURVNET_RESTORE(); 4545183550Szec } 4546195760Srwatson VNET_LIST_RUNLOCK_NOSLEEP(); 4547119643Ssam 4548105197Ssam#ifndef IPSEC_DEBUG2 4549105197Ssam /* do exchange to tick time !! */ 4550105197Ssam (void)timeout((void *)key_timehandler, (void *)0, hz); 4551105197Ssam#endif /* IPSEC_DEBUG2 */ 4552105197Ssam} 4553105197Ssam 4554105197Ssamu_long 4555105197Ssamkey_random() 4556105197Ssam{ 4557105197Ssam u_long value; 4558105197Ssam 4559105197Ssam key_randomfill(&value, sizeof(value)); 4560105197Ssam return value; 4561105197Ssam} 4562105197Ssam 4563105197Ssamvoid 4564105197Ssamkey_randomfill(p, l) 4565105197Ssam void *p; 4566105197Ssam size_t l; 4567105197Ssam{ 4568105197Ssam size_t n; 4569105197Ssam u_long v; 4570105197Ssam static int warn = 1; 4571105197Ssam 4572105197Ssam n = 0; 4573105197Ssam n = (size_t)read_random(p, (u_int)l); 4574105197Ssam /* last resort */ 4575105197Ssam while (n < l) { 4576105197Ssam v = random(); 4577105197Ssam bcopy(&v, (u_int8_t *)p + n, 4578105197Ssam l - n < sizeof(v) ? l - n : sizeof(v)); 4579105197Ssam n += sizeof(v); 4580105197Ssam 4581105197Ssam if (warn) { 4582105197Ssam printf("WARNING: pseudo-random number generator " 4583105197Ssam "used for IPsec processing\n"); 4584105197Ssam warn = 0; 4585105197Ssam } 4586105197Ssam } 4587105197Ssam} 4588105197Ssam 4589105197Ssam/* 4590105197Ssam * map SADB_SATYPE_* to IPPROTO_*. 4591105197Ssam * if satype == SADB_SATYPE then satype is mapped to ~0. 4592105197Ssam * OUT: 4593105197Ssam * 0: invalid satype. 4594105197Ssam */ 4595105197Ssamstatic u_int16_t 4596189004Srdivackykey_satype2proto(u_int8_t satype) 4597105197Ssam{ 4598105197Ssam switch (satype) { 4599105197Ssam case SADB_SATYPE_UNSPEC: 4600105197Ssam return IPSEC_PROTO_ANY; 4601105197Ssam case SADB_SATYPE_AH: 4602105197Ssam return IPPROTO_AH; 4603105197Ssam case SADB_SATYPE_ESP: 4604105197Ssam return IPPROTO_ESP; 4605105197Ssam case SADB_X_SATYPE_IPCOMP: 4606105197Ssam return IPPROTO_IPCOMP; 4607125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 4608125680Sbms return IPPROTO_TCP; 4609105197Ssam default: 4610105197Ssam return 0; 4611105197Ssam } 4612105197Ssam /* NOTREACHED */ 4613105197Ssam} 4614105197Ssam 4615105197Ssam/* 4616105197Ssam * map IPPROTO_* to SADB_SATYPE_* 4617105197Ssam * OUT: 4618105197Ssam * 0: invalid protocol type. 4619105197Ssam */ 4620105197Ssamstatic u_int8_t 4621189004Srdivackykey_proto2satype(u_int16_t proto) 4622105197Ssam{ 4623105197Ssam switch (proto) { 4624105197Ssam case IPPROTO_AH: 4625105197Ssam return SADB_SATYPE_AH; 4626105197Ssam case IPPROTO_ESP: 4627105197Ssam return SADB_SATYPE_ESP; 4628105197Ssam case IPPROTO_IPCOMP: 4629105197Ssam return SADB_X_SATYPE_IPCOMP; 4630125680Sbms case IPPROTO_TCP: 4631125680Sbms return SADB_X_SATYPE_TCPSIGNATURE; 4632105197Ssam default: 4633105197Ssam return 0; 4634105197Ssam } 4635105197Ssam /* NOTREACHED */ 4636105197Ssam} 4637105197Ssam 4638105197Ssam/* %%% PF_KEY */ 4639105197Ssam/* 4640105197Ssam * SADB_GETSPI processing is to receive 4641105197Ssam * <base, (SA2), src address, dst address, (SPI range)> 4642105197Ssam * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4643105197Ssam * tree with the status of LARVAL, and send 4644105197Ssam * <base, SA(*), address(SD)> 4645105197Ssam * to the IKMPd. 4646105197Ssam * 4647105197Ssam * IN: mhp: pointer to the pointer to each header. 4648105197Ssam * OUT: NULL if fail. 4649105197Ssam * other if success, return pointer to the message to send. 4650105197Ssam */ 4651105197Ssamstatic int 4652105197Ssamkey_getspi(so, m, mhp) 4653105197Ssam struct socket *so; 4654105197Ssam struct mbuf *m; 4655105197Ssam const struct sadb_msghdr *mhp; 4656105197Ssam{ 4657105197Ssam struct sadb_address *src0, *dst0; 4658105197Ssam struct secasindex saidx; 4659105197Ssam struct secashead *newsah; 4660105197Ssam struct secasvar *newsav; 4661105197Ssam u_int8_t proto; 4662105197Ssam u_int32_t spi; 4663105197Ssam u_int8_t mode; 4664105197Ssam u_int32_t reqid; 4665105197Ssam int error; 4666105197Ssam 4667120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4668120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4669120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4670120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4671105197Ssam 4672105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4673105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4674120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4675120585Ssam __func__)); 4676105197Ssam return key_senderror(so, m, EINVAL); 4677105197Ssam } 4678105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4679105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4680120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4681120585Ssam __func__)); 4682105197Ssam return key_senderror(so, m, EINVAL); 4683105197Ssam } 4684105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4685105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4686105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4687105197Ssam } else { 4688105197Ssam mode = IPSEC_MODE_ANY; 4689105197Ssam reqid = 0; 4690105197Ssam } 4691105197Ssam 4692105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4693105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4694105197Ssam 4695105197Ssam /* map satype to proto */ 4696105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4697120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4698120585Ssam __func__)); 4699105197Ssam return key_senderror(so, m, EINVAL); 4700105197Ssam } 4701105197Ssam 4702194062Svanhu /* 4703194062Svanhu * Make sure the port numbers are zero. 4704194062Svanhu * In case of NAT-T we will update them later if needed. 4705194062Svanhu */ 4706105197Ssam switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4707105197Ssam case AF_INET: 4708105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4709105197Ssam sizeof(struct sockaddr_in)) 4710105197Ssam return key_senderror(so, m, EINVAL); 4711105197Ssam ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4712105197Ssam break; 4713105197Ssam case AF_INET6: 4714105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4715105197Ssam sizeof(struct sockaddr_in6)) 4716105197Ssam return key_senderror(so, m, EINVAL); 4717105197Ssam ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4718105197Ssam break; 4719105197Ssam default: 4720105197Ssam ; /*???*/ 4721105197Ssam } 4722105197Ssam switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4723105197Ssam case AF_INET: 4724105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4725105197Ssam sizeof(struct sockaddr_in)) 4726105197Ssam return key_senderror(so, m, EINVAL); 4727105197Ssam ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4728105197Ssam break; 4729105197Ssam case AF_INET6: 4730105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4731105197Ssam sizeof(struct sockaddr_in6)) 4732105197Ssam return key_senderror(so, m, EINVAL); 4733105197Ssam ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4734105197Ssam break; 4735105197Ssam default: 4736105197Ssam ; /*???*/ 4737105197Ssam } 4738105197Ssam 4739105197Ssam /* XXX boundary check against sa_len */ 4740105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4741105197Ssam 4742194062Svanhu#ifdef IPSEC_NAT_T 4743194062Svanhu /* 4744194062Svanhu * Handle NAT-T info if present. 4745194062Svanhu * We made sure the port numbers are zero above, so we do 4746194062Svanhu * not have to worry in case we do not update them. 4747194062Svanhu */ 4748194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 4749194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAi present\n", __func__)); 4750194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 4751194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAr present\n", __func__)); 4752194062Svanhu 4753194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 4754194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 4755194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 4756194062Svanhu struct sadb_x_nat_t_type *type; 4757194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 4758194062Svanhu 4759194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 4760194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 4761194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 4762194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid nat-t message " 4763194062Svanhu "passed.\n", __func__)); 4764194062Svanhu return key_senderror(so, m, EINVAL); 4765194062Svanhu } 4766194062Svanhu 4767194062Svanhu sport = (struct sadb_x_nat_t_port *) 4768194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 4769194062Svanhu dport = (struct sadb_x_nat_t_port *) 4770194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 4771194062Svanhu 4772194062Svanhu if (sport) 4773194062Svanhu KEY_PORTTOSADDR(&saidx.src, sport->sadb_x_nat_t_port_port); 4774194062Svanhu if (dport) 4775194062Svanhu KEY_PORTTOSADDR(&saidx.dst, dport->sadb_x_nat_t_port_port); 4776194062Svanhu } 4777194062Svanhu#endif 4778194062Svanhu 4779105197Ssam /* SPI allocation */ 4780105197Ssam spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4781105197Ssam &saidx); 4782105197Ssam if (spi == 0) 4783105197Ssam return key_senderror(so, m, EINVAL); 4784105197Ssam 4785105197Ssam /* get a SA index */ 4786105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 4787105197Ssam /* create a new SA index */ 4788105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 4789120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4790105197Ssam return key_senderror(so, m, ENOBUFS); 4791105197Ssam } 4792105197Ssam } 4793105197Ssam 4794105197Ssam /* get a new SA */ 4795105197Ssam /* XXX rewrite */ 4796105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4797105197Ssam if (newsav == NULL) { 4798105197Ssam /* XXX don't free new SA index allocated in above. */ 4799105197Ssam return key_senderror(so, m, error); 4800105197Ssam } 4801105197Ssam 4802105197Ssam /* set spi */ 4803105197Ssam newsav->spi = htonl(spi); 4804105197Ssam 4805105197Ssam /* delete the entry in acqtree */ 4806105197Ssam if (mhp->msg->sadb_msg_seq != 0) { 4807105197Ssam struct secacq *acq; 4808105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4809105197Ssam /* reset counter in order to deletion by timehandler. */ 4810105197Ssam acq->created = time_second; 4811105197Ssam acq->count = 0; 4812105197Ssam } 4813105197Ssam } 4814105197Ssam 4815105197Ssam { 4816105197Ssam struct mbuf *n, *nn; 4817105197Ssam struct sadb_sa *m_sa; 4818105197Ssam struct sadb_msg *newmsg; 4819105197Ssam int off, len; 4820105197Ssam 4821105197Ssam /* create new sadb_msg to reply. */ 4822105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4823105197Ssam PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4824105197Ssam 4825111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 4826105197Ssam if (len > MHLEN) { 4827111119Simp MCLGET(n, M_DONTWAIT); 4828105197Ssam if ((n->m_flags & M_EXT) == 0) { 4829105197Ssam m_freem(n); 4830105197Ssam n = NULL; 4831105197Ssam } 4832105197Ssam } 4833105197Ssam if (!n) 4834105197Ssam return key_senderror(so, m, ENOBUFS); 4835105197Ssam 4836105197Ssam n->m_len = len; 4837105197Ssam n->m_next = NULL; 4838105197Ssam off = 0; 4839105197Ssam 4840105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4841105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4842105197Ssam 4843105197Ssam m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4844105197Ssam m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4845105197Ssam m_sa->sadb_sa_exttype = SADB_EXT_SA; 4846105197Ssam m_sa->sadb_sa_spi = htonl(spi); 4847105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4848105197Ssam 4849120585Ssam IPSEC_ASSERT(off == len, 4850120585Ssam ("length inconsistency (off %u len %u)", off, len)); 4851105197Ssam 4852105197Ssam n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4853105197Ssam SADB_EXT_ADDRESS_DST); 4854105197Ssam if (!n->m_next) { 4855105197Ssam m_freem(n); 4856105197Ssam return key_senderror(so, m, ENOBUFS); 4857105197Ssam } 4858105197Ssam 4859105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 4860105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 4861105197Ssam if (n == NULL) 4862105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4863105197Ssam } 4864105197Ssam 4865105197Ssam n->m_pkthdr.len = 0; 4866105197Ssam for (nn = n; nn; nn = nn->m_next) 4867105197Ssam n->m_pkthdr.len += nn->m_len; 4868105197Ssam 4869105197Ssam newmsg = mtod(n, struct sadb_msg *); 4870105197Ssam newmsg->sadb_msg_seq = newsav->seq; 4871105197Ssam newmsg->sadb_msg_errno = 0; 4872105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4873105197Ssam 4874105197Ssam m_freem(m); 4875105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4876105197Ssam } 4877105197Ssam} 4878105197Ssam 4879105197Ssam/* 4880105197Ssam * allocating new SPI 4881105197Ssam * called by key_getspi(). 4882105197Ssam * OUT: 4883105197Ssam * 0: failure. 4884105197Ssam * others: success. 4885105197Ssam */ 4886105197Ssamstatic u_int32_t 4887105197Ssamkey_do_getnewspi(spirange, saidx) 4888105197Ssam struct sadb_spirange *spirange; 4889105197Ssam struct secasindex *saidx; 4890105197Ssam{ 4891105197Ssam u_int32_t newspi; 4892105197Ssam u_int32_t min, max; 4893181803Sbz int count = V_key_spi_trycnt; 4894105197Ssam 4895105197Ssam /* set spi range to allocate */ 4896105197Ssam if (spirange != NULL) { 4897105197Ssam min = spirange->sadb_spirange_min; 4898105197Ssam max = spirange->sadb_spirange_max; 4899105197Ssam } else { 4900181803Sbz min = V_key_spi_minval; 4901181803Sbz max = V_key_spi_maxval; 4902105197Ssam } 4903105197Ssam /* IPCOMP needs 2-byte SPI */ 4904105197Ssam if (saidx->proto == IPPROTO_IPCOMP) { 4905105197Ssam u_int32_t t; 4906105197Ssam if (min >= 0x10000) 4907105197Ssam min = 0xffff; 4908105197Ssam if (max >= 0x10000) 4909105197Ssam max = 0xffff; 4910105197Ssam if (min > max) { 4911105197Ssam t = min; min = max; max = t; 4912105197Ssam } 4913105197Ssam } 4914105197Ssam 4915105197Ssam if (min == max) { 4916105197Ssam if (key_checkspidup(saidx, min) != NULL) { 4917120585Ssam ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4918120585Ssam __func__, min)); 4919105197Ssam return 0; 4920105197Ssam } 4921105197Ssam 4922105197Ssam count--; /* taking one cost. */ 4923105197Ssam newspi = min; 4924105197Ssam 4925105197Ssam } else { 4926105197Ssam 4927105197Ssam /* init SPI */ 4928105197Ssam newspi = 0; 4929105197Ssam 4930105197Ssam /* when requesting to allocate spi ranged */ 4931105197Ssam while (count--) { 4932105197Ssam /* generate pseudo-random SPI value ranged. */ 4933105197Ssam newspi = min + (key_random() % (max - min + 1)); 4934105197Ssam 4935105197Ssam if (key_checkspidup(saidx, newspi) == NULL) 4936105197Ssam break; 4937105197Ssam } 4938105197Ssam 4939105197Ssam if (count == 0 || newspi == 0) { 4940120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4941120585Ssam __func__)); 4942105197Ssam return 0; 4943105197Ssam } 4944105197Ssam } 4945105197Ssam 4946105197Ssam /* statistics */ 4947105197Ssam keystat.getspi_count = 4948181803Sbz (keystat.getspi_count + V_key_spi_trycnt - count) / 2; 4949105197Ssam 4950105197Ssam return newspi; 4951105197Ssam} 4952105197Ssam 4953105197Ssam/* 4954105197Ssam * SADB_UPDATE processing 4955105197Ssam * receive 4956105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4957105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4958105197Ssam * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4959105197Ssam * and send 4960105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4961105197Ssam * (identity(SD),) (sensitivity)> 4962105197Ssam * to the ikmpd. 4963105197Ssam * 4964105197Ssam * m will always be freed. 4965105197Ssam */ 4966105197Ssamstatic int 4967105197Ssamkey_update(so, m, mhp) 4968105197Ssam struct socket *so; 4969105197Ssam struct mbuf *m; 4970105197Ssam const struct sadb_msghdr *mhp; 4971105197Ssam{ 4972105197Ssam struct sadb_sa *sa0; 4973105197Ssam struct sadb_address *src0, *dst0; 4974194062Svanhu#ifdef IPSEC_NAT_T 4975194062Svanhu struct sadb_x_nat_t_type *type; 4976194513Sbz struct sadb_x_nat_t_port *sport, *dport; 4977194062Svanhu struct sadb_address *iaddr, *raddr; 4978194062Svanhu struct sadb_x_nat_t_frag *frag; 4979194062Svanhu#endif 4980105197Ssam struct secasindex saidx; 4981105197Ssam struct secashead *sah; 4982105197Ssam struct secasvar *sav; 4983105197Ssam u_int16_t proto; 4984105197Ssam u_int8_t mode; 4985105197Ssam u_int32_t reqid; 4986105197Ssam int error; 4987105197Ssam 4988120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4989120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4990120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4991120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4992105197Ssam 4993105197Ssam /* map satype to proto */ 4994105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4995120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4996120585Ssam __func__)); 4997105197Ssam return key_senderror(so, m, EINVAL); 4998105197Ssam } 4999105197Ssam 5000105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5001105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5002105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5003105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5004105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5005105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5006105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5007105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5008105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5009105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5010105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5011120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5012120585Ssam __func__)); 5013105197Ssam return key_senderror(so, m, EINVAL); 5014105197Ssam } 5015105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5016105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5017105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5018120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5019120585Ssam __func__)); 5020105197Ssam return key_senderror(so, m, EINVAL); 5021105197Ssam } 5022105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5023105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5024105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5025105197Ssam } else { 5026105197Ssam mode = IPSEC_MODE_ANY; 5027105197Ssam reqid = 0; 5028105197Ssam } 5029105197Ssam /* XXX boundary checking for other extensions */ 5030105197Ssam 5031105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5032105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5033105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5034105197Ssam 5035105197Ssam /* XXX boundary check against sa_len */ 5036105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5037105197Ssam 5038194062Svanhu /* 5039194062Svanhu * Make sure the port numbers are zero. 5040194062Svanhu * In case of NAT-T we will update them later if needed. 5041194062Svanhu */ 5042194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5043194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5044194062Svanhu 5045194062Svanhu#ifdef IPSEC_NAT_T 5046194062Svanhu /* 5047194062Svanhu * Handle NAT-T info if present. 5048194062Svanhu */ 5049194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5050194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5051194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5052194062Svanhu 5053194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5054194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5055194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5056194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5057194062Svanhu __func__)); 5058194062Svanhu return key_senderror(so, m, EINVAL); 5059194062Svanhu } 5060194062Svanhu 5061194062Svanhu type = (struct sadb_x_nat_t_type *) 5062194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5063194062Svanhu sport = (struct sadb_x_nat_t_port *) 5064194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5065194062Svanhu dport = (struct sadb_x_nat_t_port *) 5066194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5067194062Svanhu } else { 5068194062Svanhu type = 0; 5069194513Sbz sport = dport = 0; 5070194062Svanhu } 5071194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5072194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5073194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5074194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5075194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5076194062Svanhu __func__)); 5077194062Svanhu return key_senderror(so, m, EINVAL); 5078194062Svanhu } 5079194062Svanhu iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5080194062Svanhu raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5081194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5082194062Svanhu } else { 5083194062Svanhu iaddr = raddr = NULL; 5084194062Svanhu } 5085194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5086194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5087194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5088194062Svanhu __func__)); 5089194062Svanhu return key_senderror(so, m, EINVAL); 5090194062Svanhu } 5091194062Svanhu frag = (struct sadb_x_nat_t_frag *) 5092194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5093194062Svanhu } else { 5094194062Svanhu frag = 0; 5095194062Svanhu } 5096194062Svanhu#endif 5097194062Svanhu 5098105197Ssam /* get a SA header */ 5099105197Ssam if ((sah = key_getsah(&saidx)) == NULL) { 5100120585Ssam ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 5101105197Ssam return key_senderror(so, m, ENOENT); 5102105197Ssam } 5103105197Ssam 5104105197Ssam /* set spidx if there */ 5105105197Ssam /* XXX rewrite */ 5106105197Ssam error = key_setident(sah, m, mhp); 5107105197Ssam if (error) 5108105197Ssam return key_senderror(so, m, error); 5109105197Ssam 5110105197Ssam /* find a SA with sequence number. */ 5111105197Ssam#ifdef IPSEC_DOSEQCHECK 5112105197Ssam if (mhp->msg->sadb_msg_seq != 0 5113105197Ssam && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5114120585Ssam ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 5115120585Ssam "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 5116105197Ssam return key_senderror(so, m, ENOENT); 5117105197Ssam } 5118105197Ssam#else 5119120585Ssam SAHTREE_LOCK(); 5120120585Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5121120585Ssam SAHTREE_UNLOCK(); 5122120585Ssam if (sav == NULL) { 5123120585Ssam ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 5124120585Ssam __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5125105197Ssam return key_senderror(so, m, EINVAL); 5126105197Ssam } 5127105197Ssam#endif 5128105197Ssam 5129105197Ssam /* validity check */ 5130105197Ssam if (sav->sah->saidx.proto != proto) { 5131120585Ssam ipseclog((LOG_DEBUG, "%s: protocol mismatched " 5132120585Ssam "(DB=%u param=%u)\n", __func__, 5133120585Ssam sav->sah->saidx.proto, proto)); 5134105197Ssam return key_senderror(so, m, EINVAL); 5135105197Ssam } 5136105197Ssam#ifdef IPSEC_DOSEQCHECK 5137105197Ssam if (sav->spi != sa0->sadb_sa_spi) { 5138120585Ssam ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 5139120585Ssam __func__, 5140105197Ssam (u_int32_t)ntohl(sav->spi), 5141105197Ssam (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5142105197Ssam return key_senderror(so, m, EINVAL); 5143105197Ssam } 5144105197Ssam#endif 5145105197Ssam if (sav->pid != mhp->msg->sadb_msg_pid) { 5146120585Ssam ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 5147120585Ssam __func__, sav->pid, mhp->msg->sadb_msg_pid)); 5148105197Ssam return key_senderror(so, m, EINVAL); 5149105197Ssam } 5150105197Ssam 5151105197Ssam /* copy sav values */ 5152105197Ssam error = key_setsaval(sav, m, mhp); 5153105197Ssam if (error) { 5154105197Ssam KEY_FREESAV(&sav); 5155105197Ssam return key_senderror(so, m, error); 5156105197Ssam } 5157105197Ssam 5158105197Ssam /* check SA values to be mature. */ 5159105197Ssam if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5160105197Ssam KEY_FREESAV(&sav); 5161105197Ssam return key_senderror(so, m, 0); 5162105197Ssam } 5163105197Ssam 5164194062Svanhu#ifdef IPSEC_NAT_T 5165194062Svanhu /* 5166194062Svanhu * Handle more NAT-T info if present, 5167194062Svanhu * now that we have a sav to fill. 5168194062Svanhu */ 5169194062Svanhu if (type) 5170194062Svanhu sav->natt_type = type->sadb_x_nat_t_type_type; 5171194062Svanhu 5172194513Sbz if (sport) 5173194513Sbz KEY_PORTTOSADDR(&sav->sah->saidx.src, 5174194513Sbz sport->sadb_x_nat_t_port_port); 5175194513Sbz if (dport) 5176194513Sbz KEY_PORTTOSADDR(&sav->sah->saidx.dst, 5177194513Sbz dport->sadb_x_nat_t_port_port); 5178194513Sbz 5179194062Svanhu#if 0 5180194062Svanhu /* 5181194062Svanhu * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5182194062Svanhu * We should actually check for a minimum MTU here, if we 5183194062Svanhu * want to support it in ip_output. 5184194062Svanhu */ 5185194062Svanhu if (frag) 5186194062Svanhu sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5187194062Svanhu#endif 5188194062Svanhu#endif 5189194062Svanhu 5190105197Ssam { 5191105197Ssam struct mbuf *n; 5192105197Ssam 5193105197Ssam /* set msg buf from mhp */ 5194105197Ssam n = key_getmsgbuf_x1(m, mhp); 5195105197Ssam if (n == NULL) { 5196120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5197105197Ssam return key_senderror(so, m, ENOBUFS); 5198105197Ssam } 5199105197Ssam 5200105197Ssam m_freem(m); 5201105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5202105197Ssam } 5203105197Ssam} 5204105197Ssam 5205105197Ssam/* 5206105197Ssam * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5207105197Ssam * only called by key_update(). 5208105197Ssam * OUT: 5209105197Ssam * NULL : not found 5210105197Ssam * others : found, pointer to a SA. 5211105197Ssam */ 5212105197Ssam#ifdef IPSEC_DOSEQCHECK 5213105197Ssamstatic struct secasvar * 5214105197Ssamkey_getsavbyseq(sah, seq) 5215105197Ssam struct secashead *sah; 5216105197Ssam u_int32_t seq; 5217105197Ssam{ 5218105197Ssam struct secasvar *sav; 5219105197Ssam u_int state; 5220105197Ssam 5221105197Ssam state = SADB_SASTATE_LARVAL; 5222105197Ssam 5223105197Ssam /* search SAD with sequence number ? */ 5224105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 5225105197Ssam 5226120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 5227105197Ssam 5228105197Ssam if (sav->seq == seq) { 5229158767Spjd sa_addref(sav); 5230105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5231120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 5232120585Ssam __func__, sav->refcnt, sav)); 5233105197Ssam return sav; 5234105197Ssam } 5235105197Ssam } 5236105197Ssam 5237105197Ssam return NULL; 5238105197Ssam} 5239105197Ssam#endif 5240105197Ssam 5241105197Ssam/* 5242105197Ssam * SADB_ADD processing 5243108533Sschweikh * add an entry to SA database, when received 5244105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5245105197Ssam * key(AE), (identity(SD),) (sensitivity)> 5246105197Ssam * from the ikmpd, 5247105197Ssam * and send 5248105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5249105197Ssam * (identity(SD),) (sensitivity)> 5250105197Ssam * to the ikmpd. 5251105197Ssam * 5252105197Ssam * IGNORE identity and sensitivity messages. 5253105197Ssam * 5254105197Ssam * m will always be freed. 5255105197Ssam */ 5256105197Ssamstatic int 5257105197Ssamkey_add(so, m, mhp) 5258105197Ssam struct socket *so; 5259105197Ssam struct mbuf *m; 5260105197Ssam const struct sadb_msghdr *mhp; 5261105197Ssam{ 5262105197Ssam struct sadb_sa *sa0; 5263105197Ssam struct sadb_address *src0, *dst0; 5264194062Svanhu#ifdef IPSEC_NAT_T 5265194062Svanhu struct sadb_x_nat_t_type *type; 5266194062Svanhu struct sadb_address *iaddr, *raddr; 5267194062Svanhu struct sadb_x_nat_t_frag *frag; 5268194062Svanhu#endif 5269105197Ssam struct secasindex saidx; 5270105197Ssam struct secashead *newsah; 5271105197Ssam struct secasvar *newsav; 5272105197Ssam u_int16_t proto; 5273105197Ssam u_int8_t mode; 5274105197Ssam u_int32_t reqid; 5275105197Ssam int error; 5276105197Ssam 5277120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5278120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5279120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5280120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5281105197Ssam 5282105197Ssam /* map satype to proto */ 5283105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5284120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5285120585Ssam __func__)); 5286105197Ssam return key_senderror(so, m, EINVAL); 5287105197Ssam } 5288105197Ssam 5289105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5290105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5291105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5292105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5293105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5294105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5295105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5296105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5297105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5298105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5299105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5300120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5301120585Ssam __func__)); 5302105197Ssam return key_senderror(so, m, EINVAL); 5303105197Ssam } 5304105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5305105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5306105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5307105197Ssam /* XXX need more */ 5308120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5309120585Ssam __func__)); 5310105197Ssam return key_senderror(so, m, EINVAL); 5311105197Ssam } 5312105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5313105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5314105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5315105197Ssam } else { 5316105197Ssam mode = IPSEC_MODE_ANY; 5317105197Ssam reqid = 0; 5318105197Ssam } 5319105197Ssam 5320105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5321105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5322105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5323105197Ssam 5324105197Ssam /* XXX boundary check against sa_len */ 5325105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5326105197Ssam 5327194062Svanhu /* 5328194062Svanhu * Make sure the port numbers are zero. 5329194062Svanhu * In case of NAT-T we will update them later if needed. 5330194062Svanhu */ 5331194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5332194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5333194062Svanhu 5334194062Svanhu#ifdef IPSEC_NAT_T 5335194062Svanhu /* 5336194062Svanhu * Handle NAT-T info if present. 5337194062Svanhu */ 5338194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5339194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5340194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5341194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5342194062Svanhu 5343194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5344194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5345194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5346194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5347194062Svanhu __func__)); 5348194062Svanhu return key_senderror(so, m, EINVAL); 5349194062Svanhu } 5350194062Svanhu 5351194062Svanhu type = (struct sadb_x_nat_t_type *) 5352194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5353194062Svanhu sport = (struct sadb_x_nat_t_port *) 5354194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5355194062Svanhu dport = (struct sadb_x_nat_t_port *) 5356194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5357194062Svanhu 5358194062Svanhu if (sport) 5359194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5360194062Svanhu sport->sadb_x_nat_t_port_port); 5361194062Svanhu if (dport) 5362194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5363194062Svanhu dport->sadb_x_nat_t_port_port); 5364194062Svanhu } else { 5365194062Svanhu type = 0; 5366194062Svanhu } 5367194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5368194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5369194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5370194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5371194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5372194062Svanhu __func__)); 5373194062Svanhu return key_senderror(so, m, EINVAL); 5374194062Svanhu } 5375194062Svanhu iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5376194062Svanhu raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5377194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5378194062Svanhu } else { 5379194062Svanhu iaddr = raddr = NULL; 5380194062Svanhu } 5381194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5382194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5383194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5384194062Svanhu __func__)); 5385194062Svanhu return key_senderror(so, m, EINVAL); 5386194062Svanhu } 5387194062Svanhu frag = (struct sadb_x_nat_t_frag *) 5388194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5389194062Svanhu } else { 5390194062Svanhu frag = 0; 5391194062Svanhu } 5392194062Svanhu#endif 5393194062Svanhu 5394105197Ssam /* get a SA header */ 5395105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 5396105197Ssam /* create a new SA header */ 5397105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 5398120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 5399105197Ssam return key_senderror(so, m, ENOBUFS); 5400105197Ssam } 5401105197Ssam } 5402105197Ssam 5403105197Ssam /* set spidx if there */ 5404105197Ssam /* XXX rewrite */ 5405105197Ssam error = key_setident(newsah, m, mhp); 5406105197Ssam if (error) { 5407105197Ssam return key_senderror(so, m, error); 5408105197Ssam } 5409105197Ssam 5410105197Ssam /* create new SA entry. */ 5411105197Ssam /* We can create new SA only if SPI is differenct. */ 5412120585Ssam SAHTREE_LOCK(); 5413120585Ssam newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5414120585Ssam SAHTREE_UNLOCK(); 5415120585Ssam if (newsav != NULL) { 5416120585Ssam ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 5417105197Ssam return key_senderror(so, m, EEXIST); 5418105197Ssam } 5419105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5420105197Ssam if (newsav == NULL) { 5421105197Ssam return key_senderror(so, m, error); 5422105197Ssam } 5423105197Ssam 5424105197Ssam /* check SA values to be mature. */ 5425105197Ssam if ((error = key_mature(newsav)) != 0) { 5426105197Ssam KEY_FREESAV(&newsav); 5427105197Ssam return key_senderror(so, m, error); 5428105197Ssam } 5429105197Ssam 5430194062Svanhu#ifdef IPSEC_NAT_T 5431105197Ssam /* 5432194062Svanhu * Handle more NAT-T info if present, 5433194062Svanhu * now that we have a sav to fill. 5434194062Svanhu */ 5435194062Svanhu if (type) 5436194062Svanhu newsav->natt_type = type->sadb_x_nat_t_type_type; 5437194062Svanhu 5438194062Svanhu#if 0 5439194062Svanhu /* 5440194062Svanhu * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5441194062Svanhu * We should actually check for a minimum MTU here, if we 5442194062Svanhu * want to support it in ip_output. 5443194062Svanhu */ 5444194062Svanhu if (frag) 5445194062Svanhu newsav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5446194062Svanhu#endif 5447194062Svanhu#endif 5448194062Svanhu 5449194062Svanhu /* 5450105197Ssam * don't call key_freesav() here, as we would like to keep the SA 5451105197Ssam * in the database on success. 5452105197Ssam */ 5453105197Ssam 5454105197Ssam { 5455105197Ssam struct mbuf *n; 5456105197Ssam 5457105197Ssam /* set msg buf from mhp */ 5458105197Ssam n = key_getmsgbuf_x1(m, mhp); 5459105197Ssam if (n == NULL) { 5460120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5461105197Ssam return key_senderror(so, m, ENOBUFS); 5462105197Ssam } 5463105197Ssam 5464105197Ssam m_freem(m); 5465105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5466105197Ssam } 5467105197Ssam} 5468105197Ssam 5469105197Ssam/* m is retained */ 5470105197Ssamstatic int 5471105197Ssamkey_setident(sah, m, mhp) 5472105197Ssam struct secashead *sah; 5473105197Ssam struct mbuf *m; 5474105197Ssam const struct sadb_msghdr *mhp; 5475105197Ssam{ 5476105197Ssam const struct sadb_ident *idsrc, *iddst; 5477105197Ssam int idsrclen, iddstlen; 5478105197Ssam 5479120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 5480120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5481120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5482120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5483105197Ssam 5484105197Ssam /* don't make buffer if not there */ 5485105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5486105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5487105197Ssam sah->idents = NULL; 5488105197Ssam sah->identd = NULL; 5489105197Ssam return 0; 5490105197Ssam } 5491105197Ssam 5492105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5493105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5494120585Ssam ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 5495105197Ssam return EINVAL; 5496105197Ssam } 5497105197Ssam 5498105197Ssam idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5499105197Ssam iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5500105197Ssam idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5501105197Ssam iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5502105197Ssam 5503105197Ssam /* validity check */ 5504105197Ssam if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5505120585Ssam ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 5506105197Ssam return EINVAL; 5507105197Ssam } 5508105197Ssam 5509105197Ssam switch (idsrc->sadb_ident_type) { 5510105197Ssam case SADB_IDENTTYPE_PREFIX: 5511105197Ssam case SADB_IDENTTYPE_FQDN: 5512105197Ssam case SADB_IDENTTYPE_USERFQDN: 5513105197Ssam default: 5514105197Ssam /* XXX do nothing */ 5515105197Ssam sah->idents = NULL; 5516105197Ssam sah->identd = NULL; 5517105197Ssam return 0; 5518105197Ssam } 5519105197Ssam 5520105197Ssam /* make structure */ 5521157123Sgnn sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5522105197Ssam if (sah->idents == NULL) { 5523120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5524105197Ssam return ENOBUFS; 5525105197Ssam } 5526157123Sgnn sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5527105197Ssam if (sah->identd == NULL) { 5528119643Ssam free(sah->idents, M_IPSEC_MISC); 5529105197Ssam sah->idents = NULL; 5530120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5531105197Ssam return ENOBUFS; 5532105197Ssam } 5533157123Sgnn sah->idents->type = idsrc->sadb_ident_type; 5534157123Sgnn sah->idents->id = idsrc->sadb_ident_id; 5535105197Ssam 5536157123Sgnn sah->identd->type = iddst->sadb_ident_type; 5537157123Sgnn sah->identd->id = iddst->sadb_ident_id; 5538157123Sgnn 5539105197Ssam return 0; 5540105197Ssam} 5541105197Ssam 5542105197Ssam/* 5543105197Ssam * m will not be freed on return. 5544105197Ssam * it is caller's responsibility to free the result. 5545105197Ssam */ 5546105197Ssamstatic struct mbuf * 5547105197Ssamkey_getmsgbuf_x1(m, mhp) 5548105197Ssam struct mbuf *m; 5549105197Ssam const struct sadb_msghdr *mhp; 5550105197Ssam{ 5551105197Ssam struct mbuf *n; 5552105197Ssam 5553120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5554120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5555120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5556105197Ssam 5557105197Ssam /* create new sadb_msg to reply. */ 5558105197Ssam n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5559105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 5560105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5561105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5562105197Ssam SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5563105197Ssam if (!n) 5564105197Ssam return NULL; 5565105197Ssam 5566105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5567105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5568105197Ssam if (n == NULL) 5569105197Ssam return NULL; 5570105197Ssam } 5571105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5572105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_len = 5573105197Ssam PFKEY_UNIT64(n->m_pkthdr.len); 5574105197Ssam 5575105197Ssam return n; 5576105197Ssam} 5577105197Ssam 5578105197Ssamstatic int key_delete_all __P((struct socket *, struct mbuf *, 5579105197Ssam const struct sadb_msghdr *, u_int16_t)); 5580105197Ssam 5581105197Ssam/* 5582105197Ssam * SADB_DELETE processing 5583105197Ssam * receive 5584105197Ssam * <base, SA(*), address(SD)> 5585105197Ssam * from the ikmpd, and set SADB_SASTATE_DEAD, 5586105197Ssam * and send, 5587105197Ssam * <base, SA(*), address(SD)> 5588105197Ssam * to the ikmpd. 5589105197Ssam * 5590105197Ssam * m will always be freed. 5591105197Ssam */ 5592105197Ssamstatic int 5593105197Ssamkey_delete(so, m, mhp) 5594105197Ssam struct socket *so; 5595105197Ssam struct mbuf *m; 5596105197Ssam const struct sadb_msghdr *mhp; 5597105197Ssam{ 5598105197Ssam struct sadb_sa *sa0; 5599105197Ssam struct sadb_address *src0, *dst0; 5600105197Ssam struct secasindex saidx; 5601105197Ssam struct secashead *sah; 5602105197Ssam struct secasvar *sav = NULL; 5603105197Ssam u_int16_t proto; 5604105197Ssam 5605120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5606120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5607120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5608120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5609105197Ssam 5610105197Ssam /* map satype to proto */ 5611105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5612120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5613120585Ssam __func__)); 5614105197Ssam return key_senderror(so, m, EINVAL); 5615105197Ssam } 5616105197Ssam 5617105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5618105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5619120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5620120585Ssam __func__)); 5621105197Ssam return key_senderror(so, m, EINVAL); 5622105197Ssam } 5623105197Ssam 5624105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5625105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5626120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5627120585Ssam __func__)); 5628105197Ssam return key_senderror(so, m, EINVAL); 5629105197Ssam } 5630105197Ssam 5631105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 5632105197Ssam /* 5633105197Ssam * Caller wants us to delete all non-LARVAL SAs 5634105197Ssam * that match the src/dst. This is used during 5635105197Ssam * IKE INITIAL-CONTACT. 5636105197Ssam */ 5637120585Ssam ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5638105197Ssam return key_delete_all(so, m, mhp, proto); 5639105197Ssam } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5640120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5641120585Ssam __func__)); 5642105197Ssam return key_senderror(so, m, EINVAL); 5643105197Ssam } 5644105197Ssam 5645105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5646105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5647105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5648105197Ssam 5649105197Ssam /* XXX boundary check against sa_len */ 5650105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5651105197Ssam 5652194062Svanhu /* 5653194062Svanhu * Make sure the port numbers are zero. 5654194062Svanhu * In case of NAT-T we will update them later if needed. 5655194062Svanhu */ 5656194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5657194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5658194062Svanhu 5659194062Svanhu#ifdef IPSEC_NAT_T 5660194062Svanhu /* 5661194062Svanhu * Handle NAT-T info if present. 5662194062Svanhu */ 5663194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5664194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5665194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5666194062Svanhu 5667194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5668194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5669194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5670194062Svanhu __func__)); 5671194062Svanhu return key_senderror(so, m, EINVAL); 5672194062Svanhu } 5673194062Svanhu 5674194062Svanhu sport = (struct sadb_x_nat_t_port *) 5675194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5676194062Svanhu dport = (struct sadb_x_nat_t_port *) 5677194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5678194062Svanhu 5679194062Svanhu if (sport) 5680194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5681194062Svanhu sport->sadb_x_nat_t_port_port); 5682194062Svanhu if (dport) 5683194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5684194062Svanhu dport->sadb_x_nat_t_port_port); 5685194062Svanhu } 5686194062Svanhu#endif 5687194062Svanhu 5688105197Ssam /* get a SA header */ 5689120585Ssam SAHTREE_LOCK(); 5690181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5691105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5692105197Ssam continue; 5693105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5694105197Ssam continue; 5695105197Ssam 5696105197Ssam /* get a SA with SPI. */ 5697105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5698105197Ssam if (sav) 5699105197Ssam break; 5700105197Ssam } 5701105197Ssam if (sah == NULL) { 5702120585Ssam SAHTREE_UNLOCK(); 5703120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5704105197Ssam return key_senderror(so, m, ENOENT); 5705105197Ssam } 5706105197Ssam 5707105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5708199398Svanhu KEY_FREESAV(&sav); 5709120585Ssam SAHTREE_UNLOCK(); 5710105197Ssam 5711105197Ssam { 5712105197Ssam struct mbuf *n; 5713105197Ssam struct sadb_msg *newmsg; 5714105197Ssam 5715105197Ssam /* create new sadb_msg to reply. */ 5716194062Svanhu /* XXX-BZ NAT-T extensions? */ 5717105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5718105197Ssam SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5719105197Ssam if (!n) 5720105197Ssam return key_senderror(so, m, ENOBUFS); 5721105197Ssam 5722105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5723105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5724105197Ssam if (n == NULL) 5725105197Ssam return key_senderror(so, m, ENOBUFS); 5726105197Ssam } 5727105197Ssam newmsg = mtod(n, struct sadb_msg *); 5728105197Ssam newmsg->sadb_msg_errno = 0; 5729105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5730105197Ssam 5731105197Ssam m_freem(m); 5732105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5733105197Ssam } 5734105197Ssam} 5735105197Ssam 5736105197Ssam/* 5737105197Ssam * delete all SAs for src/dst. Called from key_delete(). 5738105197Ssam */ 5739105197Ssamstatic int 5740189004Srdivackykey_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, 5741189004Srdivacky u_int16_t proto) 5742105197Ssam{ 5743105197Ssam struct sadb_address *src0, *dst0; 5744105197Ssam struct secasindex saidx; 5745105197Ssam struct secashead *sah; 5746105197Ssam struct secasvar *sav, *nextsav; 5747105197Ssam u_int stateidx, state; 5748105197Ssam 5749105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5750105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5751105197Ssam 5752105197Ssam /* XXX boundary check against sa_len */ 5753105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5754105197Ssam 5755194062Svanhu /* 5756194062Svanhu * Make sure the port numbers are zero. 5757194062Svanhu * In case of NAT-T we will update them later if needed. 5758194062Svanhu */ 5759194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5760194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5761194062Svanhu 5762194062Svanhu#ifdef IPSEC_NAT_T 5763194062Svanhu /* 5764194062Svanhu * Handle NAT-T info if present. 5765194062Svanhu */ 5766194062Svanhu 5767194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5768194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5769194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5770194062Svanhu 5771194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5772194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5773194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5774194062Svanhu __func__)); 5775194062Svanhu return key_senderror(so, m, EINVAL); 5776194062Svanhu } 5777194062Svanhu 5778194062Svanhu sport = (struct sadb_x_nat_t_port *) 5779194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5780194062Svanhu dport = (struct sadb_x_nat_t_port *) 5781194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5782194062Svanhu 5783194062Svanhu if (sport) 5784194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5785194062Svanhu sport->sadb_x_nat_t_port_port); 5786194062Svanhu if (dport) 5787194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5788194062Svanhu dport->sadb_x_nat_t_port_port); 5789194062Svanhu } 5790194062Svanhu#endif 5791194062Svanhu 5792120585Ssam SAHTREE_LOCK(); 5793181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5794105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5795105197Ssam continue; 5796105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5797105197Ssam continue; 5798105197Ssam 5799105197Ssam /* Delete all non-LARVAL SAs. */ 5800105197Ssam for (stateidx = 0; 5801185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 5802105197Ssam stateidx++) { 5803185348Szec state = saorder_state_alive[stateidx]; 5804105197Ssam if (state == SADB_SASTATE_LARVAL) 5805105197Ssam continue; 5806105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 5807105197Ssam sav != NULL; sav = nextsav) { 5808105197Ssam nextsav = LIST_NEXT(sav, chain); 5809105197Ssam /* sanity check */ 5810105197Ssam if (sav->state != state) { 5811120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 5812120585Ssam "sav->state (queue %d SA %d)\n", 5813120585Ssam __func__, state, sav->state)); 5814105197Ssam continue; 5815105197Ssam } 5816105197Ssam 5817105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5818105197Ssam KEY_FREESAV(&sav); 5819105197Ssam } 5820105197Ssam } 5821105197Ssam } 5822120585Ssam SAHTREE_UNLOCK(); 5823105197Ssam { 5824105197Ssam struct mbuf *n; 5825105197Ssam struct sadb_msg *newmsg; 5826105197Ssam 5827105197Ssam /* create new sadb_msg to reply. */ 5828194062Svanhu /* XXX-BZ NAT-T extensions? */ 5829105197Ssam n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5830105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5831105197Ssam if (!n) 5832105197Ssam return key_senderror(so, m, ENOBUFS); 5833105197Ssam 5834105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5835105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5836105197Ssam if (n == NULL) 5837105197Ssam return key_senderror(so, m, ENOBUFS); 5838105197Ssam } 5839105197Ssam newmsg = mtod(n, struct sadb_msg *); 5840105197Ssam newmsg->sadb_msg_errno = 0; 5841105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5842105197Ssam 5843105197Ssam m_freem(m); 5844105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5845105197Ssam } 5846105197Ssam} 5847105197Ssam 5848105197Ssam/* 5849105197Ssam * SADB_GET processing 5850105197Ssam * receive 5851105197Ssam * <base, SA(*), address(SD)> 5852105197Ssam * from the ikmpd, and get a SP and a SA to respond, 5853105197Ssam * and send, 5854105197Ssam * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5855105197Ssam * (identity(SD),) (sensitivity)> 5856105197Ssam * to the ikmpd. 5857105197Ssam * 5858105197Ssam * m will always be freed. 5859105197Ssam */ 5860105197Ssamstatic int 5861105197Ssamkey_get(so, m, mhp) 5862105197Ssam struct socket *so; 5863105197Ssam struct mbuf *m; 5864105197Ssam const struct sadb_msghdr *mhp; 5865105197Ssam{ 5866105197Ssam struct sadb_sa *sa0; 5867105197Ssam struct sadb_address *src0, *dst0; 5868105197Ssam struct secasindex saidx; 5869105197Ssam struct secashead *sah; 5870105197Ssam struct secasvar *sav = NULL; 5871105197Ssam u_int16_t proto; 5872105197Ssam 5873120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5874120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5875120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5876120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5877105197Ssam 5878105197Ssam /* map satype to proto */ 5879105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5880120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5881120585Ssam __func__)); 5882105197Ssam return key_senderror(so, m, EINVAL); 5883105197Ssam } 5884105197Ssam 5885105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5886105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5887105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5888120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5889120585Ssam __func__)); 5890105197Ssam return key_senderror(so, m, EINVAL); 5891105197Ssam } 5892105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5893105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5894105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5895120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5896120585Ssam __func__)); 5897105197Ssam return key_senderror(so, m, EINVAL); 5898105197Ssam } 5899105197Ssam 5900105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5901105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5902105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5903105197Ssam 5904105197Ssam /* XXX boundary check against sa_len */ 5905105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5906105197Ssam 5907194062Svanhu /* 5908194062Svanhu * Make sure the port numbers are zero. 5909194062Svanhu * In case of NAT-T we will update them later if needed. 5910194062Svanhu */ 5911194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5912194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5913194062Svanhu 5914194062Svanhu#ifdef IPSEC_NAT_T 5915194062Svanhu /* 5916194062Svanhu * Handle NAT-T info if present. 5917194062Svanhu */ 5918194062Svanhu 5919194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5920194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5921194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5922194062Svanhu 5923194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5924194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5925194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5926194062Svanhu __func__)); 5927194062Svanhu return key_senderror(so, m, EINVAL); 5928194062Svanhu } 5929194062Svanhu 5930194062Svanhu sport = (struct sadb_x_nat_t_port *) 5931194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5932194062Svanhu dport = (struct sadb_x_nat_t_port *) 5933194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5934194062Svanhu 5935194062Svanhu if (sport) 5936194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5937194062Svanhu sport->sadb_x_nat_t_port_port); 5938194062Svanhu if (dport) 5939194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5940194062Svanhu dport->sadb_x_nat_t_port_port); 5941194062Svanhu } 5942194062Svanhu#endif 5943194062Svanhu 5944105197Ssam /* get a SA header */ 5945120585Ssam SAHTREE_LOCK(); 5946181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5947105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5948105197Ssam continue; 5949105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5950105197Ssam continue; 5951105197Ssam 5952105197Ssam /* get a SA with SPI. */ 5953105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5954105197Ssam if (sav) 5955105197Ssam break; 5956105197Ssam } 5957120585Ssam SAHTREE_UNLOCK(); 5958105197Ssam if (sah == NULL) { 5959120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5960105197Ssam return key_senderror(so, m, ENOENT); 5961105197Ssam } 5962105197Ssam 5963105197Ssam { 5964105197Ssam struct mbuf *n; 5965105197Ssam u_int8_t satype; 5966105197Ssam 5967105197Ssam /* map proto to satype */ 5968105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5969120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5970120585Ssam __func__)); 5971105197Ssam return key_senderror(so, m, EINVAL); 5972105197Ssam } 5973105197Ssam 5974105197Ssam /* create new sadb_msg to reply. */ 5975105197Ssam n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5976105197Ssam mhp->msg->sadb_msg_pid); 5977105197Ssam if (!n) 5978105197Ssam return key_senderror(so, m, ENOBUFS); 5979105197Ssam 5980105197Ssam m_freem(m); 5981105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5982105197Ssam } 5983105197Ssam} 5984105197Ssam 5985105197Ssam/* XXX make it sysctl-configurable? */ 5986105197Ssamstatic void 5987105197Ssamkey_getcomb_setlifetime(comb) 5988105197Ssam struct sadb_comb *comb; 5989105197Ssam{ 5990105197Ssam 5991105197Ssam comb->sadb_comb_soft_allocations = 1; 5992105197Ssam comb->sadb_comb_hard_allocations = 1; 5993105197Ssam comb->sadb_comb_soft_bytes = 0; 5994105197Ssam comb->sadb_comb_hard_bytes = 0; 5995105197Ssam comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5996105197Ssam comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 5997105197Ssam comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 5998105197Ssam comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 5999105197Ssam} 6000105197Ssam 6001105197Ssam/* 6002105197Ssam * XXX reorder combinations by preference 6003105197Ssam * XXX no idea if the user wants ESP authentication or not 6004105197Ssam */ 6005105197Ssamstatic struct mbuf * 6006105197Ssamkey_getcomb_esp() 6007105197Ssam{ 6008105197Ssam struct sadb_comb *comb; 6009105197Ssam struct enc_xform *algo; 6010105197Ssam struct mbuf *result = NULL, *m, *n; 6011105197Ssam int encmin; 6012105197Ssam int i, off, o; 6013105197Ssam int totlen; 6014105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6015105197Ssam 6016105197Ssam m = NULL; 6017105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6018105197Ssam algo = esp_algorithm_lookup(i); 6019105197Ssam if (algo == NULL) 6020105197Ssam continue; 6021105197Ssam 6022105197Ssam /* discard algorithms with key size smaller than system min */ 6023181803Sbz if (_BITS(algo->maxkey) < V_ipsec_esp_keymin) 6024105197Ssam continue; 6025181803Sbz if (_BITS(algo->minkey) < V_ipsec_esp_keymin) 6026181803Sbz encmin = V_ipsec_esp_keymin; 6027105197Ssam else 6028105197Ssam encmin = _BITS(algo->minkey); 6029105197Ssam 6030181803Sbz if (V_ipsec_esp_auth) 6031105197Ssam m = key_getcomb_ah(); 6032105197Ssam else { 6033120585Ssam IPSEC_ASSERT(l <= MLEN, 6034120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6035111119Simp MGET(m, M_DONTWAIT, MT_DATA); 6036105197Ssam if (m) { 6037105197Ssam M_ALIGN(m, l); 6038105197Ssam m->m_len = l; 6039105197Ssam m->m_next = NULL; 6040105197Ssam bzero(mtod(m, caddr_t), m->m_len); 6041105197Ssam } 6042105197Ssam } 6043105197Ssam if (!m) 6044105197Ssam goto fail; 6045105197Ssam 6046105197Ssam totlen = 0; 6047105197Ssam for (n = m; n; n = n->m_next) 6048105197Ssam totlen += n->m_len; 6049120585Ssam IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 6050105197Ssam 6051105197Ssam for (off = 0; off < totlen; off += l) { 6052105197Ssam n = m_pulldown(m, off, l, &o); 6053105197Ssam if (!n) { 6054105197Ssam /* m is already freed */ 6055105197Ssam goto fail; 6056105197Ssam } 6057105197Ssam comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 6058105197Ssam bzero(comb, sizeof(*comb)); 6059105197Ssam key_getcomb_setlifetime(comb); 6060105197Ssam comb->sadb_comb_encrypt = i; 6061105197Ssam comb->sadb_comb_encrypt_minbits = encmin; 6062105197Ssam comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6063105197Ssam } 6064105197Ssam 6065105197Ssam if (!result) 6066105197Ssam result = m; 6067105197Ssam else 6068105197Ssam m_cat(result, m); 6069105197Ssam } 6070105197Ssam 6071105197Ssam return result; 6072105197Ssam 6073105197Ssam fail: 6074105197Ssam if (result) 6075105197Ssam m_freem(result); 6076105197Ssam return NULL; 6077105197Ssam} 6078105197Ssam 6079105197Ssamstatic void 6080105197Ssamkey_getsizes_ah( 6081105197Ssam const struct auth_hash *ah, 6082105197Ssam int alg, 6083105197Ssam u_int16_t* min, 6084105197Ssam u_int16_t* max) 6085105197Ssam{ 6086183550Szec 6087105197Ssam *min = *max = ah->keysize; 6088105197Ssam if (ah->keysize == 0) { 6089105197Ssam /* 6090105197Ssam * Transform takes arbitrary key size but algorithm 6091105197Ssam * key size is restricted. Enforce this here. 6092105197Ssam */ 6093105197Ssam switch (alg) { 6094105197Ssam case SADB_X_AALG_MD5: *min = *max = 16; break; 6095105197Ssam case SADB_X_AALG_SHA: *min = *max = 20; break; 6096105197Ssam case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 6097105197Ssam default: 6098120585Ssam DPRINTF(("%s: unknown AH algorithm %u\n", 6099120585Ssam __func__, alg)); 6100105197Ssam break; 6101105197Ssam } 6102105197Ssam } 6103105197Ssam} 6104105197Ssam 6105105197Ssam/* 6106105197Ssam * XXX reorder combinations by preference 6107105197Ssam */ 6108105197Ssamstatic struct mbuf * 6109105197Ssamkey_getcomb_ah() 6110105197Ssam{ 6111105197Ssam struct sadb_comb *comb; 6112105197Ssam struct auth_hash *algo; 6113105197Ssam struct mbuf *m; 6114105197Ssam u_int16_t minkeysize, maxkeysize; 6115105197Ssam int i; 6116105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6117105197Ssam 6118105197Ssam m = NULL; 6119105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6120105197Ssam#if 1 6121105197Ssam /* we prefer HMAC algorithms, not old algorithms */ 6122105197Ssam if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 6123105197Ssam continue; 6124105197Ssam#endif 6125105197Ssam algo = ah_algorithm_lookup(i); 6126105197Ssam if (!algo) 6127105197Ssam continue; 6128105197Ssam key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6129105197Ssam /* discard algorithms with key size smaller than system min */ 6130181803Sbz if (_BITS(minkeysize) < V_ipsec_ah_keymin) 6131105197Ssam continue; 6132105197Ssam 6133105197Ssam if (!m) { 6134120585Ssam IPSEC_ASSERT(l <= MLEN, 6135120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6136111119Simp MGET(m, M_DONTWAIT, MT_DATA); 6137105197Ssam if (m) { 6138105197Ssam M_ALIGN(m, l); 6139105197Ssam m->m_len = l; 6140105197Ssam m->m_next = NULL; 6141105197Ssam } 6142105197Ssam } else 6143111119Simp M_PREPEND(m, l, M_DONTWAIT); 6144105197Ssam if (!m) 6145105197Ssam return NULL; 6146105197Ssam 6147105197Ssam comb = mtod(m, struct sadb_comb *); 6148105197Ssam bzero(comb, sizeof(*comb)); 6149105197Ssam key_getcomb_setlifetime(comb); 6150105197Ssam comb->sadb_comb_auth = i; 6151105197Ssam comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6152105197Ssam comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6153105197Ssam } 6154105197Ssam 6155105197Ssam return m; 6156105197Ssam} 6157105197Ssam 6158105197Ssam/* 6159105197Ssam * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 6160105197Ssam * XXX reorder combinations by preference 6161105197Ssam */ 6162105197Ssamstatic struct mbuf * 6163105197Ssamkey_getcomb_ipcomp() 6164105197Ssam{ 6165105197Ssam struct sadb_comb *comb; 6166105197Ssam struct comp_algo *algo; 6167105197Ssam struct mbuf *m; 6168105197Ssam int i; 6169105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6170105197Ssam 6171105197Ssam m = NULL; 6172105197Ssam for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6173105197Ssam algo = ipcomp_algorithm_lookup(i); 6174105197Ssam if (!algo) 6175105197Ssam continue; 6176105197Ssam 6177105197Ssam if (!m) { 6178120585Ssam IPSEC_ASSERT(l <= MLEN, 6179120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6180111119Simp MGET(m, M_DONTWAIT, MT_DATA); 6181105197Ssam if (m) { 6182105197Ssam M_ALIGN(m, l); 6183105197Ssam m->m_len = l; 6184105197Ssam m->m_next = NULL; 6185105197Ssam } 6186105197Ssam } else 6187111119Simp M_PREPEND(m, l, M_DONTWAIT); 6188105197Ssam if (!m) 6189105197Ssam return NULL; 6190105197Ssam 6191105197Ssam comb = mtod(m, struct sadb_comb *); 6192105197Ssam bzero(comb, sizeof(*comb)); 6193105197Ssam key_getcomb_setlifetime(comb); 6194105197Ssam comb->sadb_comb_encrypt = i; 6195105197Ssam /* what should we set into sadb_comb_*_{min,max}bits? */ 6196105197Ssam } 6197105197Ssam 6198105197Ssam return m; 6199105197Ssam} 6200105197Ssam 6201105197Ssam/* 6202105197Ssam * XXX no way to pass mode (transport/tunnel) to userland 6203105197Ssam * XXX replay checking? 6204105197Ssam * XXX sysctl interface to ipsec_{ah,esp}_keymin 6205105197Ssam */ 6206105197Ssamstatic struct mbuf * 6207105197Ssamkey_getprop(saidx) 6208105197Ssam const struct secasindex *saidx; 6209105197Ssam{ 6210105197Ssam struct sadb_prop *prop; 6211105197Ssam struct mbuf *m, *n; 6212105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6213105197Ssam int totlen; 6214105197Ssam 6215105197Ssam switch (saidx->proto) { 6216105197Ssam case IPPROTO_ESP: 6217105197Ssam m = key_getcomb_esp(); 6218105197Ssam break; 6219105197Ssam case IPPROTO_AH: 6220105197Ssam m = key_getcomb_ah(); 6221105197Ssam break; 6222105197Ssam case IPPROTO_IPCOMP: 6223105197Ssam m = key_getcomb_ipcomp(); 6224105197Ssam break; 6225105197Ssam default: 6226105197Ssam return NULL; 6227105197Ssam } 6228105197Ssam 6229105197Ssam if (!m) 6230105197Ssam return NULL; 6231111119Simp M_PREPEND(m, l, M_DONTWAIT); 6232105197Ssam if (!m) 6233105197Ssam return NULL; 6234105197Ssam 6235105197Ssam totlen = 0; 6236105197Ssam for (n = m; n; n = n->m_next) 6237105197Ssam totlen += n->m_len; 6238105197Ssam 6239105197Ssam prop = mtod(m, struct sadb_prop *); 6240105197Ssam bzero(prop, sizeof(*prop)); 6241105197Ssam prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6242105197Ssam prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6243105197Ssam prop->sadb_prop_replay = 32; /* XXX */ 6244105197Ssam 6245105197Ssam return m; 6246105197Ssam} 6247105197Ssam 6248105197Ssam/* 6249105197Ssam * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6250105197Ssam * send 6251105197Ssam * <base, SA, address(SD), (address(P)), x_policy, 6252105197Ssam * (identity(SD),) (sensitivity,) proposal> 6253105197Ssam * to KMD, and expect to receive 6254105197Ssam * <base> with SADB_ACQUIRE if error occured, 6255105197Ssam * or 6256105197Ssam * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6257105197Ssam * from KMD by PF_KEY. 6258105197Ssam * 6259105197Ssam * XXX x_policy is outside of RFC2367 (KAME extension). 6260105197Ssam * XXX sensitivity is not supported. 6261105197Ssam * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6262105197Ssam * see comment for key_getcomb_ipcomp(). 6263105197Ssam * 6264105197Ssam * OUT: 6265105197Ssam * 0 : succeed 6266105197Ssam * others: error number 6267105197Ssam */ 6268105197Ssamstatic int 6269105197Ssamkey_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6270105197Ssam{ 6271105197Ssam struct mbuf *result = NULL, *m; 6272105197Ssam struct secacq *newacq; 6273105197Ssam u_int8_t satype; 6274105197Ssam int error = -1; 6275105197Ssam u_int32_t seq; 6276105197Ssam 6277120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 6278105197Ssam satype = key_proto2satype(saidx->proto); 6279120585Ssam IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 6280105197Ssam 6281105197Ssam /* 6282105197Ssam * We never do anything about acquirng SA. There is anather 6283105197Ssam * solution that kernel blocks to send SADB_ACQUIRE message until 6284105197Ssam * getting something message from IKEd. In later case, to be 6285105197Ssam * managed with ACQUIRING list. 6286105197Ssam */ 6287108533Sschweikh /* Get an entry to check whether sending message or not. */ 6288105197Ssam if ((newacq = key_getacq(saidx)) != NULL) { 6289181803Sbz if (V_key_blockacq_count < newacq->count) { 6290105197Ssam /* reset counter and do send message. */ 6291105197Ssam newacq->count = 0; 6292105197Ssam } else { 6293105197Ssam /* increment counter and do nothing. */ 6294105197Ssam newacq->count++; 6295105197Ssam return 0; 6296105197Ssam } 6297105197Ssam } else { 6298105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 6299105197Ssam if ((newacq = key_newacq(saidx)) == NULL) 6300105197Ssam return ENOBUFS; 6301105197Ssam } 6302105197Ssam 6303105197Ssam 6304105197Ssam seq = newacq->seq; 6305105197Ssam m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6306105197Ssam if (!m) { 6307105197Ssam error = ENOBUFS; 6308105197Ssam goto fail; 6309105197Ssam } 6310105197Ssam result = m; 6311105197Ssam 6312194062Svanhu /* 6313194062Svanhu * No SADB_X_EXT_NAT_T_* here: we do not know 6314194062Svanhu * anything related to NAT-T at this time. 6315194062Svanhu */ 6316194062Svanhu 6317105197Ssam /* set sadb_address for saidx's. */ 6318105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6319105197Ssam &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6320105197Ssam if (!m) { 6321105197Ssam error = ENOBUFS; 6322105197Ssam goto fail; 6323105197Ssam } 6324105197Ssam m_cat(result, m); 6325105197Ssam 6326105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6327105197Ssam &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6328105197Ssam if (!m) { 6329105197Ssam error = ENOBUFS; 6330105197Ssam goto fail; 6331105197Ssam } 6332105197Ssam m_cat(result, m); 6333105197Ssam 6334105197Ssam /* XXX proxy address (optional) */ 6335105197Ssam 6336105197Ssam /* set sadb_x_policy */ 6337105197Ssam if (sp) { 6338105197Ssam m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6339105197Ssam if (!m) { 6340105197Ssam error = ENOBUFS; 6341105197Ssam goto fail; 6342105197Ssam } 6343105197Ssam m_cat(result, m); 6344105197Ssam } 6345105197Ssam 6346105197Ssam /* XXX identity (optional) */ 6347105197Ssam#if 0 6348105197Ssam if (idexttype && fqdn) { 6349105197Ssam /* create identity extension (FQDN) */ 6350105197Ssam struct sadb_ident *id; 6351105197Ssam int fqdnlen; 6352105197Ssam 6353105197Ssam fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6354105197Ssam id = (struct sadb_ident *)p; 6355105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6356105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6357105197Ssam id->sadb_ident_exttype = idexttype; 6358105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6359105197Ssam bcopy(fqdn, id + 1, fqdnlen); 6360105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6361105197Ssam } 6362105197Ssam 6363105197Ssam if (idexttype) { 6364105197Ssam /* create identity extension (USERFQDN) */ 6365105197Ssam struct sadb_ident *id; 6366105197Ssam int userfqdnlen; 6367105197Ssam 6368105197Ssam if (userfqdn) { 6369105197Ssam /* +1 for terminating-NUL */ 6370105197Ssam userfqdnlen = strlen(userfqdn) + 1; 6371105197Ssam } else 6372105197Ssam userfqdnlen = 0; 6373105197Ssam id = (struct sadb_ident *)p; 6374105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6375105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6376105197Ssam id->sadb_ident_exttype = idexttype; 6377105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6378105197Ssam /* XXX is it correct? */ 6379105197Ssam if (curproc && curproc->p_cred) 6380105197Ssam id->sadb_ident_id = curproc->p_cred->p_ruid; 6381105197Ssam if (userfqdn && userfqdnlen) 6382105197Ssam bcopy(userfqdn, id + 1, userfqdnlen); 6383105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6384105197Ssam } 6385105197Ssam#endif 6386105197Ssam 6387105197Ssam /* XXX sensitivity (optional) */ 6388105197Ssam 6389105197Ssam /* create proposal/combination extension */ 6390105197Ssam m = key_getprop(saidx); 6391105197Ssam#if 0 6392105197Ssam /* 6393105197Ssam * spec conformant: always attach proposal/combination extension, 6394105197Ssam * the problem is that we have no way to attach it for ipcomp, 6395105197Ssam * due to the way sadb_comb is declared in RFC2367. 6396105197Ssam */ 6397105197Ssam if (!m) { 6398105197Ssam error = ENOBUFS; 6399105197Ssam goto fail; 6400105197Ssam } 6401105197Ssam m_cat(result, m); 6402105197Ssam#else 6403105197Ssam /* 6404105197Ssam * outside of spec; make proposal/combination extension optional. 6405105197Ssam */ 6406105197Ssam if (m) 6407105197Ssam m_cat(result, m); 6408105197Ssam#endif 6409105197Ssam 6410105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 6411105197Ssam error = EINVAL; 6412105197Ssam goto fail; 6413105197Ssam } 6414105197Ssam 6415105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 6416105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 6417105197Ssam if (result == NULL) { 6418105197Ssam error = ENOBUFS; 6419105197Ssam goto fail; 6420105197Ssam } 6421105197Ssam } 6422105197Ssam 6423105197Ssam result->m_pkthdr.len = 0; 6424105197Ssam for (m = result; m; m = m->m_next) 6425105197Ssam result->m_pkthdr.len += m->m_len; 6426105197Ssam 6427105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 6428105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 6429105197Ssam 6430105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6431105197Ssam 6432105197Ssam fail: 6433105197Ssam if (result) 6434105197Ssam m_freem(result); 6435105197Ssam return error; 6436105197Ssam} 6437105197Ssam 6438105197Ssamstatic struct secacq * 6439105197Ssamkey_newacq(const struct secasindex *saidx) 6440105197Ssam{ 6441105197Ssam struct secacq *newacq; 6442105197Ssam 6443105197Ssam /* get new entry */ 6444119643Ssam newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6445105197Ssam if (newacq == NULL) { 6446120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6447105197Ssam return NULL; 6448105197Ssam } 6449105197Ssam 6450105197Ssam /* copy secindex */ 6451105197Ssam bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6452181803Sbz newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); 6453105197Ssam newacq->created = time_second; 6454105197Ssam newacq->count = 0; 6455105197Ssam 6456119643Ssam /* add to acqtree */ 6457120585Ssam ACQ_LOCK(); 6458181803Sbz LIST_INSERT_HEAD(&V_acqtree, newacq, chain); 6459120585Ssam ACQ_UNLOCK(); 6460119643Ssam 6461105197Ssam return newacq; 6462105197Ssam} 6463105197Ssam 6464105197Ssamstatic struct secacq * 6465105197Ssamkey_getacq(const struct secasindex *saidx) 6466105197Ssam{ 6467105197Ssam struct secacq *acq; 6468105197Ssam 6469120585Ssam ACQ_LOCK(); 6470181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 6471105197Ssam if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6472119643Ssam break; 6473105197Ssam } 6474120585Ssam ACQ_UNLOCK(); 6475105197Ssam 6476119643Ssam return acq; 6477105197Ssam} 6478105197Ssam 6479105197Ssamstatic struct secacq * 6480105197Ssamkey_getacqbyseq(seq) 6481105197Ssam u_int32_t seq; 6482105197Ssam{ 6483105197Ssam struct secacq *acq; 6484105197Ssam 6485120585Ssam ACQ_LOCK(); 6486181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 6487105197Ssam if (acq->seq == seq) 6488119643Ssam break; 6489105197Ssam } 6490120585Ssam ACQ_UNLOCK(); 6491105197Ssam 6492119643Ssam return acq; 6493105197Ssam} 6494105197Ssam 6495105197Ssamstatic struct secspacq * 6496105197Ssamkey_newspacq(spidx) 6497105197Ssam struct secpolicyindex *spidx; 6498105197Ssam{ 6499105197Ssam struct secspacq *acq; 6500105197Ssam 6501105197Ssam /* get new entry */ 6502119643Ssam acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6503105197Ssam if (acq == NULL) { 6504120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6505105197Ssam return NULL; 6506105197Ssam } 6507105197Ssam 6508105197Ssam /* copy secindex */ 6509105197Ssam bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6510105197Ssam acq->created = time_second; 6511105197Ssam acq->count = 0; 6512105197Ssam 6513119643Ssam /* add to spacqtree */ 6514120585Ssam SPACQ_LOCK(); 6515181803Sbz LIST_INSERT_HEAD(&V_spacqtree, acq, chain); 6516120585Ssam SPACQ_UNLOCK(); 6517119643Ssam 6518105197Ssam return acq; 6519105197Ssam} 6520105197Ssam 6521105197Ssamstatic struct secspacq * 6522105197Ssamkey_getspacq(spidx) 6523105197Ssam struct secpolicyindex *spidx; 6524105197Ssam{ 6525105197Ssam struct secspacq *acq; 6526105197Ssam 6527120585Ssam SPACQ_LOCK(); 6528181803Sbz LIST_FOREACH(acq, &V_spacqtree, chain) { 6529119643Ssam if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 6530119643Ssam /* NB: return holding spacq_lock */ 6531105197Ssam return acq; 6532119643Ssam } 6533105197Ssam } 6534120585Ssam SPACQ_UNLOCK(); 6535105197Ssam 6536105197Ssam return NULL; 6537105197Ssam} 6538105197Ssam 6539105197Ssam/* 6540105197Ssam * SADB_ACQUIRE processing, 6541105197Ssam * in first situation, is receiving 6542105197Ssam * <base> 6543105197Ssam * from the ikmpd, and clear sequence of its secasvar entry. 6544105197Ssam * 6545105197Ssam * In second situation, is receiving 6546105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6547105197Ssam * from a user land process, and return 6548105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6549105197Ssam * to the socket. 6550105197Ssam * 6551105197Ssam * m will always be freed. 6552105197Ssam */ 6553105197Ssamstatic int 6554105197Ssamkey_acquire2(so, m, mhp) 6555105197Ssam struct socket *so; 6556105197Ssam struct mbuf *m; 6557105197Ssam const struct sadb_msghdr *mhp; 6558105197Ssam{ 6559105197Ssam const struct sadb_address *src0, *dst0; 6560105197Ssam struct secasindex saidx; 6561105197Ssam struct secashead *sah; 6562105197Ssam u_int16_t proto; 6563105197Ssam int error; 6564105197Ssam 6565120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6566120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6567120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6568120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6569105197Ssam 6570105197Ssam /* 6571105197Ssam * Error message from KMd. 6572105197Ssam * We assume that if error was occured in IKEd, the length of PFKEY 6573105197Ssam * message is equal to the size of sadb_msg structure. 6574105197Ssam * We do not raise error even if error occured in this function. 6575105197Ssam */ 6576105197Ssam if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6577105197Ssam struct secacq *acq; 6578105197Ssam 6579105197Ssam /* check sequence number */ 6580105197Ssam if (mhp->msg->sadb_msg_seq == 0) { 6581120585Ssam ipseclog((LOG_DEBUG, "%s: must specify sequence " 6582120585Ssam "number.\n", __func__)); 6583105197Ssam m_freem(m); 6584105197Ssam return 0; 6585105197Ssam } 6586105197Ssam 6587105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6588105197Ssam /* 6589105197Ssam * the specified larval SA is already gone, or we got 6590105197Ssam * a bogus sequence number. we can silently ignore it. 6591105197Ssam */ 6592105197Ssam m_freem(m); 6593105197Ssam return 0; 6594105197Ssam } 6595105197Ssam 6596105197Ssam /* reset acq counter in order to deletion by timehander. */ 6597105197Ssam acq->created = time_second; 6598105197Ssam acq->count = 0; 6599105197Ssam m_freem(m); 6600105197Ssam return 0; 6601105197Ssam } 6602105197Ssam 6603105197Ssam /* 6604105197Ssam * This message is from user land. 6605105197Ssam */ 6606105197Ssam 6607105197Ssam /* map satype to proto */ 6608105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6609120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6610120585Ssam __func__)); 6611105197Ssam return key_senderror(so, m, EINVAL); 6612105197Ssam } 6613105197Ssam 6614105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6615105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6616105197Ssam mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6617105197Ssam /* error */ 6618120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6619120585Ssam __func__)); 6620105197Ssam return key_senderror(so, m, EINVAL); 6621105197Ssam } 6622105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6623105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6624105197Ssam mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6625105197Ssam /* error */ 6626120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6627120585Ssam __func__)); 6628105197Ssam return key_senderror(so, m, EINVAL); 6629105197Ssam } 6630105197Ssam 6631105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6632105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6633105197Ssam 6634105197Ssam /* XXX boundary check against sa_len */ 6635105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6636105197Ssam 6637194062Svanhu /* 6638194062Svanhu * Make sure the port numbers are zero. 6639194062Svanhu * In case of NAT-T we will update them later if needed. 6640194062Svanhu */ 6641194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 6642194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 6643194062Svanhu 6644194062Svanhu#ifndef IPSEC_NAT_T 6645194062Svanhu /* 6646194062Svanhu * Handle NAT-T info if present. 6647194062Svanhu */ 6648194062Svanhu 6649194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 6650194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 6651194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 6652194062Svanhu 6653194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 6654194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 6655194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 6656194062Svanhu __func__)); 6657194062Svanhu return key_senderror(so, m, EINVAL); 6658194062Svanhu } 6659194062Svanhu 6660194062Svanhu sport = (struct sadb_x_nat_t_port *) 6661194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 6662194062Svanhu dport = (struct sadb_x_nat_t_port *) 6663194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 6664194062Svanhu 6665194062Svanhu if (sport) 6666194062Svanhu KEY_PORTTOSADDR(&saidx.src, 6667194062Svanhu sport->sadb_x_nat_t_port_port); 6668194062Svanhu if (dport) 6669194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 6670194062Svanhu dport->sadb_x_nat_t_port_port); 6671194062Svanhu } 6672194062Svanhu#endif 6673194062Svanhu 6674105197Ssam /* get a SA index */ 6675120585Ssam SAHTREE_LOCK(); 6676181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6677105197Ssam if (sah->state == SADB_SASTATE_DEAD) 6678105197Ssam continue; 6679105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6680105197Ssam break; 6681105197Ssam } 6682120585Ssam SAHTREE_UNLOCK(); 6683105197Ssam if (sah != NULL) { 6684120585Ssam ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 6685105197Ssam return key_senderror(so, m, EEXIST); 6686105197Ssam } 6687105197Ssam 6688105197Ssam error = key_acquire(&saidx, NULL); 6689105197Ssam if (error != 0) { 6690120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 6691120585Ssam __func__, mhp->msg->sadb_msg_errno)); 6692105197Ssam return key_senderror(so, m, error); 6693105197Ssam } 6694105197Ssam 6695105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6696105197Ssam} 6697105197Ssam 6698105197Ssam/* 6699105197Ssam * SADB_REGISTER processing. 6700105197Ssam * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6701105197Ssam * receive 6702105197Ssam * <base> 6703105197Ssam * from the ikmpd, and register a socket to send PF_KEY messages, 6704105197Ssam * and send 6705105197Ssam * <base, supported> 6706105197Ssam * to KMD by PF_KEY. 6707105197Ssam * If socket is detached, must free from regnode. 6708105197Ssam * 6709105197Ssam * m will always be freed. 6710105197Ssam */ 6711105197Ssamstatic int 6712105197Ssamkey_register(so, m, mhp) 6713105197Ssam struct socket *so; 6714105197Ssam struct mbuf *m; 6715105197Ssam const struct sadb_msghdr *mhp; 6716105197Ssam{ 6717105197Ssam struct secreg *reg, *newreg = 0; 6718105197Ssam 6719120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6720120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6721120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6722120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6723105197Ssam 6724105197Ssam /* check for invalid register message */ 6725181803Sbz if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0])) 6726105197Ssam return key_senderror(so, m, EINVAL); 6727105197Ssam 6728105197Ssam /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6729105197Ssam if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6730105197Ssam goto setmsg; 6731105197Ssam 6732105197Ssam /* check whether existing or not */ 6733120585Ssam REGTREE_LOCK(); 6734181803Sbz LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) { 6735105197Ssam if (reg->so == so) { 6736120585Ssam REGTREE_UNLOCK(); 6737120585Ssam ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6738120585Ssam __func__)); 6739105197Ssam return key_senderror(so, m, EEXIST); 6740105197Ssam } 6741105197Ssam } 6742105197Ssam 6743105197Ssam /* create regnode */ 6744119643Ssam newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6745105197Ssam if (newreg == NULL) { 6746120585Ssam REGTREE_UNLOCK(); 6747120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6748105197Ssam return key_senderror(so, m, ENOBUFS); 6749105197Ssam } 6750105197Ssam 6751105197Ssam newreg->so = so; 6752105197Ssam ((struct keycb *)sotorawcb(so))->kp_registered++; 6753105197Ssam 6754105197Ssam /* add regnode to regtree. */ 6755181803Sbz LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain); 6756120585Ssam REGTREE_UNLOCK(); 6757105197Ssam 6758105197Ssam setmsg: 6759105197Ssam { 6760105197Ssam struct mbuf *n; 6761105197Ssam struct sadb_msg *newmsg; 6762105197Ssam struct sadb_supported *sup; 6763105197Ssam u_int len, alen, elen; 6764105197Ssam int off; 6765105197Ssam int i; 6766105197Ssam struct sadb_alg *alg; 6767105197Ssam 6768105197Ssam /* create new sadb_msg to reply. */ 6769105197Ssam alen = 0; 6770105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6771105197Ssam if (ah_algorithm_lookup(i)) 6772105197Ssam alen += sizeof(struct sadb_alg); 6773105197Ssam } 6774105197Ssam if (alen) 6775105197Ssam alen += sizeof(struct sadb_supported); 6776105197Ssam elen = 0; 6777105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6778105197Ssam if (esp_algorithm_lookup(i)) 6779105197Ssam elen += sizeof(struct sadb_alg); 6780105197Ssam } 6781105197Ssam if (elen) 6782105197Ssam elen += sizeof(struct sadb_supported); 6783105197Ssam 6784105197Ssam len = sizeof(struct sadb_msg) + alen + elen; 6785105197Ssam 6786105197Ssam if (len > MCLBYTES) 6787105197Ssam return key_senderror(so, m, ENOBUFS); 6788105197Ssam 6789111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6790105197Ssam if (len > MHLEN) { 6791111119Simp MCLGET(n, M_DONTWAIT); 6792105197Ssam if ((n->m_flags & M_EXT) == 0) { 6793105197Ssam m_freem(n); 6794105197Ssam n = NULL; 6795105197Ssam } 6796105197Ssam } 6797105197Ssam if (!n) 6798105197Ssam return key_senderror(so, m, ENOBUFS); 6799105197Ssam 6800105197Ssam n->m_pkthdr.len = n->m_len = len; 6801105197Ssam n->m_next = NULL; 6802105197Ssam off = 0; 6803105197Ssam 6804105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6805105197Ssam newmsg = mtod(n, struct sadb_msg *); 6806105197Ssam newmsg->sadb_msg_errno = 0; 6807105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6808105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6809105197Ssam 6810105197Ssam /* for authentication algorithm */ 6811105197Ssam if (alen) { 6812105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6813105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(alen); 6814105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6815105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6816105197Ssam 6817105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6818105197Ssam struct auth_hash *aalgo; 6819105197Ssam u_int16_t minkeysize, maxkeysize; 6820105197Ssam 6821105197Ssam aalgo = ah_algorithm_lookup(i); 6822105197Ssam if (!aalgo) 6823105197Ssam continue; 6824105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6825105197Ssam alg->sadb_alg_id = i; 6826105197Ssam alg->sadb_alg_ivlen = 0; 6827105197Ssam key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6828105197Ssam alg->sadb_alg_minbits = _BITS(minkeysize); 6829105197Ssam alg->sadb_alg_maxbits = _BITS(maxkeysize); 6830105197Ssam off += PFKEY_ALIGN8(sizeof(*alg)); 6831105197Ssam } 6832105197Ssam } 6833105197Ssam 6834105197Ssam /* for encryption algorithm */ 6835105197Ssam if (elen) { 6836105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6837105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(elen); 6838105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6839105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6840105197Ssam 6841105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6842105197Ssam struct enc_xform *ealgo; 6843105197Ssam 6844105197Ssam ealgo = esp_algorithm_lookup(i); 6845105197Ssam if (!ealgo) 6846105197Ssam continue; 6847105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6848105197Ssam alg->sadb_alg_id = i; 6849105197Ssam alg->sadb_alg_ivlen = ealgo->blocksize; 6850105197Ssam alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6851105197Ssam alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6852105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6853105197Ssam } 6854105197Ssam } 6855105197Ssam 6856120585Ssam IPSEC_ASSERT(off == len, 6857120585Ssam ("length assumption failed (off %u len %u)", off, len)); 6858105197Ssam 6859105197Ssam m_freem(m); 6860105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6861105197Ssam } 6862105197Ssam} 6863105197Ssam 6864105197Ssam/* 6865105197Ssam * free secreg entry registered. 6866105197Ssam * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6867105197Ssam */ 6868105197Ssamvoid 6869119643Ssamkey_freereg(struct socket *so) 6870105197Ssam{ 6871105197Ssam struct secreg *reg; 6872105197Ssam int i; 6873105197Ssam 6874120585Ssam IPSEC_ASSERT(so != NULL, ("NULL so")); 6875105197Ssam 6876105197Ssam /* 6877105197Ssam * check whether existing or not. 6878105197Ssam * check all type of SA, because there is a potential that 6879105197Ssam * one socket is registered to multiple type of SA. 6880105197Ssam */ 6881120585Ssam REGTREE_LOCK(); 6882105197Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6883181803Sbz LIST_FOREACH(reg, &V_regtree[i], chain) { 6884119643Ssam if (reg->so == so && __LIST_CHAINED(reg)) { 6885105197Ssam LIST_REMOVE(reg, chain); 6886119643Ssam free(reg, M_IPSEC_SAR); 6887105197Ssam break; 6888105197Ssam } 6889105197Ssam } 6890105197Ssam } 6891120585Ssam REGTREE_UNLOCK(); 6892105197Ssam} 6893105197Ssam 6894105197Ssam/* 6895105197Ssam * SADB_EXPIRE processing 6896105197Ssam * send 6897105197Ssam * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6898105197Ssam * to KMD by PF_KEY. 6899105197Ssam * NOTE: We send only soft lifetime extension. 6900105197Ssam * 6901105197Ssam * OUT: 0 : succeed 6902105197Ssam * others : error number 6903105197Ssam */ 6904105197Ssamstatic int 6905119643Ssamkey_expire(struct secasvar *sav) 6906105197Ssam{ 6907105197Ssam int s; 6908105197Ssam int satype; 6909105197Ssam struct mbuf *result = NULL, *m; 6910105197Ssam int len; 6911105197Ssam int error = -1; 6912105197Ssam struct sadb_lifetime *lt; 6913105197Ssam 6914105197Ssam /* XXX: Why do we lock ? */ 6915105197Ssam s = splnet(); /*called from softclock()*/ 6916105197Ssam 6917120585Ssam IPSEC_ASSERT (sav != NULL, ("null sav")); 6918120585Ssam IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6919105197Ssam 6920105197Ssam /* set msg header */ 6921120585Ssam satype = key_proto2satype(sav->sah->saidx.proto); 6922120585Ssam IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6923105197Ssam m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6924105197Ssam if (!m) { 6925105197Ssam error = ENOBUFS; 6926105197Ssam goto fail; 6927105197Ssam } 6928105197Ssam result = m; 6929105197Ssam 6930105197Ssam /* create SA extension */ 6931105197Ssam m = key_setsadbsa(sav); 6932105197Ssam if (!m) { 6933105197Ssam error = ENOBUFS; 6934105197Ssam goto fail; 6935105197Ssam } 6936105197Ssam m_cat(result, m); 6937105197Ssam 6938105197Ssam /* create SA extension */ 6939105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 6940105197Ssam sav->replay ? sav->replay->count : 0, 6941105197Ssam sav->sah->saidx.reqid); 6942105197Ssam if (!m) { 6943105197Ssam error = ENOBUFS; 6944105197Ssam goto fail; 6945105197Ssam } 6946105197Ssam m_cat(result, m); 6947105197Ssam 6948105197Ssam /* create lifetime extension (current and soft) */ 6949105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6950105197Ssam m = key_alloc_mbuf(len); 6951105197Ssam if (!m || m->m_next) { /*XXX*/ 6952105197Ssam if (m) 6953105197Ssam m_freem(m); 6954105197Ssam error = ENOBUFS; 6955105197Ssam goto fail; 6956105197Ssam } 6957105197Ssam bzero(mtod(m, caddr_t), len); 6958105197Ssam lt = mtod(m, struct sadb_lifetime *); 6959105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6960105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6961157123Sgnn lt->sadb_lifetime_allocations = sav->lft_c->allocations; 6962157123Sgnn lt->sadb_lifetime_bytes = sav->lft_c->bytes; 6963157123Sgnn lt->sadb_lifetime_addtime = sav->lft_c->addtime; 6964157123Sgnn lt->sadb_lifetime_usetime = sav->lft_c->usetime; 6965105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6966176743Sbz lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6967176743Sbz lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 6968176743Sbz lt->sadb_lifetime_allocations = sav->lft_s->allocations; 6969176743Sbz lt->sadb_lifetime_bytes = sav->lft_s->bytes; 6970176743Sbz lt->sadb_lifetime_addtime = sav->lft_s->addtime; 6971176743Sbz lt->sadb_lifetime_usetime = sav->lft_s->usetime; 6972105197Ssam m_cat(result, m); 6973105197Ssam 6974105197Ssam /* set sadb_address for source */ 6975105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6976105197Ssam &sav->sah->saidx.src.sa, 6977105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6978105197Ssam if (!m) { 6979105197Ssam error = ENOBUFS; 6980105197Ssam goto fail; 6981105197Ssam } 6982105197Ssam m_cat(result, m); 6983105197Ssam 6984105197Ssam /* set sadb_address for destination */ 6985105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6986105197Ssam &sav->sah->saidx.dst.sa, 6987105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6988105197Ssam if (!m) { 6989105197Ssam error = ENOBUFS; 6990105197Ssam goto fail; 6991105197Ssam } 6992105197Ssam m_cat(result, m); 6993105197Ssam 6994194062Svanhu /* 6995194062Svanhu * XXX-BZ Handle NAT-T extensions here. 6996194062Svanhu */ 6997194062Svanhu 6998105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 6999105197Ssam error = EINVAL; 7000105197Ssam goto fail; 7001105197Ssam } 7002105197Ssam 7003105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 7004105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 7005105197Ssam if (result == NULL) { 7006105197Ssam error = ENOBUFS; 7007105197Ssam goto fail; 7008105197Ssam } 7009105197Ssam } 7010105197Ssam 7011105197Ssam result->m_pkthdr.len = 0; 7012105197Ssam for (m = result; m; m = m->m_next) 7013105197Ssam result->m_pkthdr.len += m->m_len; 7014105197Ssam 7015105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 7016105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 7017105197Ssam 7018105197Ssam splx(s); 7019105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7020105197Ssam 7021105197Ssam fail: 7022105197Ssam if (result) 7023105197Ssam m_freem(result); 7024105197Ssam splx(s); 7025105197Ssam return error; 7026105197Ssam} 7027105197Ssam 7028105197Ssam/* 7029105197Ssam * SADB_FLUSH processing 7030105197Ssam * receive 7031105197Ssam * <base> 7032105197Ssam * from the ikmpd, and free all entries in secastree. 7033105197Ssam * and send, 7034105197Ssam * <base> 7035105197Ssam * to the ikmpd. 7036105197Ssam * NOTE: to do is only marking SADB_SASTATE_DEAD. 7037105197Ssam * 7038105197Ssam * m will always be freed. 7039105197Ssam */ 7040105197Ssamstatic int 7041105197Ssamkey_flush(so, m, mhp) 7042105197Ssam struct socket *so; 7043105197Ssam struct mbuf *m; 7044105197Ssam const struct sadb_msghdr *mhp; 7045105197Ssam{ 7046105197Ssam struct sadb_msg *newmsg; 7047105197Ssam struct secashead *sah, *nextsah; 7048105197Ssam struct secasvar *sav, *nextsav; 7049105197Ssam u_int16_t proto; 7050105197Ssam u_int8_t state; 7051105197Ssam u_int stateidx; 7052105197Ssam 7053120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7054120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7055120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7056105197Ssam 7057105197Ssam /* map satype to proto */ 7058105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7059120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7060120585Ssam __func__)); 7061105197Ssam return key_senderror(so, m, EINVAL); 7062105197Ssam } 7063105197Ssam 7064105197Ssam /* no SATYPE specified, i.e. flushing all SA. */ 7065120585Ssam SAHTREE_LOCK(); 7066181803Sbz for (sah = LIST_FIRST(&V_sahtree); 7067105197Ssam sah != NULL; 7068105197Ssam sah = nextsah) { 7069105197Ssam nextsah = LIST_NEXT(sah, chain); 7070105197Ssam 7071105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7072105197Ssam && proto != sah->saidx.proto) 7073105197Ssam continue; 7074105197Ssam 7075105197Ssam for (stateidx = 0; 7076185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 7077105197Ssam stateidx++) { 7078185348Szec state = saorder_state_any[stateidx]; 7079105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 7080105197Ssam sav != NULL; 7081105197Ssam sav = nextsav) { 7082105197Ssam 7083105197Ssam nextsav = LIST_NEXT(sav, chain); 7084105197Ssam 7085105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7086105197Ssam KEY_FREESAV(&sav); 7087105197Ssam } 7088105197Ssam } 7089105197Ssam 7090105197Ssam sah->state = SADB_SASTATE_DEAD; 7091105197Ssam } 7092120585Ssam SAHTREE_UNLOCK(); 7093105197Ssam 7094105197Ssam if (m->m_len < sizeof(struct sadb_msg) || 7095105197Ssam sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7096120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 7097105197Ssam return key_senderror(so, m, ENOBUFS); 7098105197Ssam } 7099105197Ssam 7100105197Ssam if (m->m_next) 7101105197Ssam m_freem(m->m_next); 7102105197Ssam m->m_next = NULL; 7103105197Ssam m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7104105197Ssam newmsg = mtod(m, struct sadb_msg *); 7105105197Ssam newmsg->sadb_msg_errno = 0; 7106105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7107105197Ssam 7108105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7109105197Ssam} 7110105197Ssam 7111105197Ssam/* 7112105197Ssam * SADB_DUMP processing 7113105197Ssam * dump all entries including status of DEAD in SAD. 7114105197Ssam * receive 7115105197Ssam * <base> 7116105197Ssam * from the ikmpd, and dump all secasvar leaves 7117105197Ssam * and send, 7118105197Ssam * <base> ..... 7119105197Ssam * to the ikmpd. 7120105197Ssam * 7121105197Ssam * m will always be freed. 7122105197Ssam */ 7123105197Ssamstatic int 7124105197Ssamkey_dump(so, m, mhp) 7125105197Ssam struct socket *so; 7126105197Ssam struct mbuf *m; 7127105197Ssam const struct sadb_msghdr *mhp; 7128105197Ssam{ 7129105197Ssam struct secashead *sah; 7130105197Ssam struct secasvar *sav; 7131105197Ssam u_int16_t proto; 7132105197Ssam u_int stateidx; 7133105197Ssam u_int8_t satype; 7134105197Ssam u_int8_t state; 7135105197Ssam int cnt; 7136105197Ssam struct sadb_msg *newmsg; 7137105197Ssam struct mbuf *n; 7138105197Ssam 7139120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7140120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7141120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7142120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7143105197Ssam 7144105197Ssam /* map satype to proto */ 7145105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7146120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7147120585Ssam __func__)); 7148105197Ssam return key_senderror(so, m, EINVAL); 7149105197Ssam } 7150105197Ssam 7151105197Ssam /* count sav entries to be sent to the userland. */ 7152105197Ssam cnt = 0; 7153120585Ssam SAHTREE_LOCK(); 7154181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7155105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7156105197Ssam && proto != sah->saidx.proto) 7157105197Ssam continue; 7158105197Ssam 7159105197Ssam for (stateidx = 0; 7160185348Szec stateidx < _ARRAYLEN(saorder_state_any); 7161105197Ssam stateidx++) { 7162185348Szec state = saorder_state_any[stateidx]; 7163105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 7164105197Ssam cnt++; 7165105197Ssam } 7166105197Ssam } 7167105197Ssam } 7168105197Ssam 7169119643Ssam if (cnt == 0) { 7170120585Ssam SAHTREE_UNLOCK(); 7171105197Ssam return key_senderror(so, m, ENOENT); 7172119643Ssam } 7173105197Ssam 7174105197Ssam /* send this to the userland, one at a time. */ 7175105197Ssam newmsg = NULL; 7176181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7177105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7178105197Ssam && proto != sah->saidx.proto) 7179105197Ssam continue; 7180105197Ssam 7181105197Ssam /* map proto to satype */ 7182105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7183120585Ssam SAHTREE_UNLOCK(); 7184120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 7185120585Ssam "SAD.\n", __func__)); 7186105197Ssam return key_senderror(so, m, EINVAL); 7187105197Ssam } 7188105197Ssam 7189105197Ssam for (stateidx = 0; 7190185348Szec stateidx < _ARRAYLEN(saorder_state_any); 7191105197Ssam stateidx++) { 7192185348Szec state = saorder_state_any[stateidx]; 7193105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 7194105197Ssam n = key_setdumpsa(sav, SADB_DUMP, satype, 7195105197Ssam --cnt, mhp->msg->sadb_msg_pid); 7196119643Ssam if (!n) { 7197120585Ssam SAHTREE_UNLOCK(); 7198105197Ssam return key_senderror(so, m, ENOBUFS); 7199119643Ssam } 7200105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 7201105197Ssam } 7202105197Ssam } 7203105197Ssam } 7204120585Ssam SAHTREE_UNLOCK(); 7205105197Ssam 7206105197Ssam m_freem(m); 7207105197Ssam return 0; 7208105197Ssam} 7209105197Ssam 7210105197Ssam/* 7211105197Ssam * SADB_X_PROMISC processing 7212105197Ssam * 7213105197Ssam * m will always be freed. 7214105197Ssam */ 7215105197Ssamstatic int 7216105197Ssamkey_promisc(so, m, mhp) 7217105197Ssam struct socket *so; 7218105197Ssam struct mbuf *m; 7219105197Ssam const struct sadb_msghdr *mhp; 7220105197Ssam{ 7221105197Ssam int olen; 7222105197Ssam 7223120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7224120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7225120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7226120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7227105197Ssam 7228105197Ssam olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7229105197Ssam 7230105197Ssam if (olen < sizeof(struct sadb_msg)) { 7231105197Ssam#if 1 7232105197Ssam return key_senderror(so, m, EINVAL); 7233105197Ssam#else 7234105197Ssam m_freem(m); 7235105197Ssam return 0; 7236105197Ssam#endif 7237105197Ssam } else if (olen == sizeof(struct sadb_msg)) { 7238105197Ssam /* enable/disable promisc mode */ 7239105197Ssam struct keycb *kp; 7240105197Ssam 7241105197Ssam if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7242105197Ssam return key_senderror(so, m, EINVAL); 7243105197Ssam mhp->msg->sadb_msg_errno = 0; 7244105197Ssam switch (mhp->msg->sadb_msg_satype) { 7245105197Ssam case 0: 7246105197Ssam case 1: 7247105197Ssam kp->kp_promisc = mhp->msg->sadb_msg_satype; 7248105197Ssam break; 7249105197Ssam default: 7250105197Ssam return key_senderror(so, m, EINVAL); 7251105197Ssam } 7252105197Ssam 7253105197Ssam /* send the original message back to everyone */ 7254105197Ssam mhp->msg->sadb_msg_errno = 0; 7255105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7256105197Ssam } else { 7257105197Ssam /* send packet as is */ 7258105197Ssam 7259105197Ssam m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7260105197Ssam 7261105197Ssam /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7262105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7263105197Ssam } 7264105197Ssam} 7265105197Ssam 7266105197Ssamstatic int (*key_typesw[]) __P((struct socket *, struct mbuf *, 7267105197Ssam const struct sadb_msghdr *)) = { 7268105197Ssam NULL, /* SADB_RESERVED */ 7269105197Ssam key_getspi, /* SADB_GETSPI */ 7270105197Ssam key_update, /* SADB_UPDATE */ 7271105197Ssam key_add, /* SADB_ADD */ 7272105197Ssam key_delete, /* SADB_DELETE */ 7273105197Ssam key_get, /* SADB_GET */ 7274105197Ssam key_acquire2, /* SADB_ACQUIRE */ 7275105197Ssam key_register, /* SADB_REGISTER */ 7276105197Ssam NULL, /* SADB_EXPIRE */ 7277105197Ssam key_flush, /* SADB_FLUSH */ 7278105197Ssam key_dump, /* SADB_DUMP */ 7279105197Ssam key_promisc, /* SADB_X_PROMISC */ 7280105197Ssam NULL, /* SADB_X_PCHANGE */ 7281105197Ssam key_spdadd, /* SADB_X_SPDUPDATE */ 7282105197Ssam key_spdadd, /* SADB_X_SPDADD */ 7283105197Ssam key_spddelete, /* SADB_X_SPDDELETE */ 7284105197Ssam key_spdget, /* SADB_X_SPDGET */ 7285105197Ssam NULL, /* SADB_X_SPDACQUIRE */ 7286105197Ssam key_spddump, /* SADB_X_SPDDUMP */ 7287105197Ssam key_spdflush, /* SADB_X_SPDFLUSH */ 7288105197Ssam key_spdadd, /* SADB_X_SPDSETIDX */ 7289105197Ssam NULL, /* SADB_X_SPDEXPIRE */ 7290105197Ssam key_spddelete2, /* SADB_X_SPDDELETE2 */ 7291105197Ssam}; 7292105197Ssam 7293105197Ssam/* 7294105197Ssam * parse sadb_msg buffer to process PFKEYv2, 7295105197Ssam * and create a data to response if needed. 7296105197Ssam * I think to be dealed with mbuf directly. 7297105197Ssam * IN: 7298105197Ssam * msgp : pointer to pointer to a received buffer pulluped. 7299105197Ssam * This is rewrited to response. 7300105197Ssam * so : pointer to socket. 7301105197Ssam * OUT: 7302105197Ssam * length for buffer to send to user process. 7303105197Ssam */ 7304105197Ssamint 7305105197Ssamkey_parse(m, so) 7306105197Ssam struct mbuf *m; 7307105197Ssam struct socket *so; 7308105197Ssam{ 7309105197Ssam struct sadb_msg *msg; 7310105197Ssam struct sadb_msghdr mh; 7311105197Ssam u_int orglen; 7312105197Ssam int error; 7313105197Ssam int target; 7314105197Ssam 7315120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7316120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7317105197Ssam 7318105197Ssam#if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7319105197Ssam KEYDEBUG(KEYDEBUG_KEY_DUMP, 7320120585Ssam ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 7321105197Ssam kdebug_sadb(msg)); 7322105197Ssam#endif 7323105197Ssam 7324105197Ssam if (m->m_len < sizeof(struct sadb_msg)) { 7325105197Ssam m = m_pullup(m, sizeof(struct sadb_msg)); 7326105197Ssam if (!m) 7327105197Ssam return ENOBUFS; 7328105197Ssam } 7329105197Ssam msg = mtod(m, struct sadb_msg *); 7330105197Ssam orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7331105197Ssam target = KEY_SENDUP_ONE; 7332105197Ssam 7333105197Ssam if ((m->m_flags & M_PKTHDR) == 0 || 7334105197Ssam m->m_pkthdr.len != m->m_pkthdr.len) { 7335120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 7336181803Sbz V_pfkeystat.out_invlen++; 7337105197Ssam error = EINVAL; 7338105197Ssam goto senderror; 7339105197Ssam } 7340105197Ssam 7341105197Ssam if (msg->sadb_msg_version != PF_KEY_V2) { 7342120585Ssam ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 7343120585Ssam __func__, msg->sadb_msg_version)); 7344181803Sbz V_pfkeystat.out_invver++; 7345105197Ssam error = EINVAL; 7346105197Ssam goto senderror; 7347105197Ssam } 7348105197Ssam 7349105197Ssam if (msg->sadb_msg_type > SADB_MAX) { 7350120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7351120585Ssam __func__, msg->sadb_msg_type)); 7352181803Sbz V_pfkeystat.out_invmsgtype++; 7353105197Ssam error = EINVAL; 7354105197Ssam goto senderror; 7355105197Ssam } 7356105197Ssam 7357105197Ssam /* for old-fashioned code - should be nuked */ 7358105197Ssam if (m->m_pkthdr.len > MCLBYTES) { 7359105197Ssam m_freem(m); 7360105197Ssam return ENOBUFS; 7361105197Ssam } 7362105197Ssam if (m->m_next) { 7363105197Ssam struct mbuf *n; 7364105197Ssam 7365111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 7366105197Ssam if (n && m->m_pkthdr.len > MHLEN) { 7367111119Simp MCLGET(n, M_DONTWAIT); 7368105197Ssam if ((n->m_flags & M_EXT) == 0) { 7369105197Ssam m_free(n); 7370105197Ssam n = NULL; 7371105197Ssam } 7372105197Ssam } 7373105197Ssam if (!n) { 7374105197Ssam m_freem(m); 7375105197Ssam return ENOBUFS; 7376105197Ssam } 7377105197Ssam m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 7378105197Ssam n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7379105197Ssam n->m_next = NULL; 7380105197Ssam m_freem(m); 7381105197Ssam m = n; 7382105197Ssam } 7383105197Ssam 7384105197Ssam /* align the mbuf chain so that extensions are in contiguous region. */ 7385105197Ssam error = key_align(m, &mh); 7386105197Ssam if (error) 7387105197Ssam return error; 7388105197Ssam 7389105197Ssam msg = mh.msg; 7390105197Ssam 7391105197Ssam /* check SA type */ 7392105197Ssam switch (msg->sadb_msg_satype) { 7393105197Ssam case SADB_SATYPE_UNSPEC: 7394105197Ssam switch (msg->sadb_msg_type) { 7395105197Ssam case SADB_GETSPI: 7396105197Ssam case SADB_UPDATE: 7397105197Ssam case SADB_ADD: 7398105197Ssam case SADB_DELETE: 7399105197Ssam case SADB_GET: 7400105197Ssam case SADB_ACQUIRE: 7401105197Ssam case SADB_EXPIRE: 7402120585Ssam ipseclog((LOG_DEBUG, "%s: must specify satype " 7403120585Ssam "when msg type=%u.\n", __func__, 7404120585Ssam msg->sadb_msg_type)); 7405181803Sbz V_pfkeystat.out_invsatype++; 7406105197Ssam error = EINVAL; 7407105197Ssam goto senderror; 7408105197Ssam } 7409105197Ssam break; 7410105197Ssam case SADB_SATYPE_AH: 7411105197Ssam case SADB_SATYPE_ESP: 7412105197Ssam case SADB_X_SATYPE_IPCOMP: 7413125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 7414105197Ssam switch (msg->sadb_msg_type) { 7415105197Ssam case SADB_X_SPDADD: 7416105197Ssam case SADB_X_SPDDELETE: 7417105197Ssam case SADB_X_SPDGET: 7418105197Ssam case SADB_X_SPDDUMP: 7419105197Ssam case SADB_X_SPDFLUSH: 7420105197Ssam case SADB_X_SPDSETIDX: 7421105197Ssam case SADB_X_SPDUPDATE: 7422105197Ssam case SADB_X_SPDDELETE2: 7423120585Ssam ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 7424120585Ssam __func__, msg->sadb_msg_type)); 7425181803Sbz V_pfkeystat.out_invsatype++; 7426105197Ssam error = EINVAL; 7427105197Ssam goto senderror; 7428105197Ssam } 7429105197Ssam break; 7430105197Ssam case SADB_SATYPE_RSVP: 7431105197Ssam case SADB_SATYPE_OSPFV2: 7432105197Ssam case SADB_SATYPE_RIPV2: 7433105197Ssam case SADB_SATYPE_MIP: 7434120585Ssam ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 7435120585Ssam __func__, msg->sadb_msg_satype)); 7436181803Sbz V_pfkeystat.out_invsatype++; 7437105197Ssam error = EOPNOTSUPP; 7438105197Ssam goto senderror; 7439105197Ssam case 1: /* XXX: What does it do? */ 7440105197Ssam if (msg->sadb_msg_type == SADB_X_PROMISC) 7441105197Ssam break; 7442105197Ssam /*FALLTHROUGH*/ 7443105197Ssam default: 7444120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7445120585Ssam __func__, msg->sadb_msg_satype)); 7446181803Sbz V_pfkeystat.out_invsatype++; 7447105197Ssam error = EINVAL; 7448105197Ssam goto senderror; 7449105197Ssam } 7450105197Ssam 7451105197Ssam /* check field of upper layer protocol and address family */ 7452105197Ssam if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7453105197Ssam && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7454105197Ssam struct sadb_address *src0, *dst0; 7455105197Ssam u_int plen; 7456105197Ssam 7457105197Ssam src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7458105197Ssam dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7459105197Ssam 7460105197Ssam /* check upper layer protocol */ 7461105197Ssam if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7462120585Ssam ipseclog((LOG_DEBUG, "%s: upper layer protocol " 7463120585Ssam "mismatched.\n", __func__)); 7464181803Sbz V_pfkeystat.out_invaddr++; 7465105197Ssam error = EINVAL; 7466105197Ssam goto senderror; 7467105197Ssam } 7468105197Ssam 7469105197Ssam /* check family */ 7470105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_family != 7471105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_family) { 7472120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 7473120585Ssam __func__)); 7474181803Sbz V_pfkeystat.out_invaddr++; 7475105197Ssam error = EINVAL; 7476105197Ssam goto senderror; 7477105197Ssam } 7478105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 7479105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_len) { 7480120585Ssam ipseclog((LOG_DEBUG, "%s: address struct size " 7481120585Ssam "mismatched.\n", __func__)); 7482181803Sbz V_pfkeystat.out_invaddr++; 7483105197Ssam error = EINVAL; 7484105197Ssam goto senderror; 7485105197Ssam } 7486105197Ssam 7487105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7488105197Ssam case AF_INET: 7489105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 7490105197Ssam sizeof(struct sockaddr_in)) { 7491181803Sbz V_pfkeystat.out_invaddr++; 7492105197Ssam error = EINVAL; 7493105197Ssam goto senderror; 7494105197Ssam } 7495105197Ssam break; 7496105197Ssam case AF_INET6: 7497105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 7498105197Ssam sizeof(struct sockaddr_in6)) { 7499181803Sbz V_pfkeystat.out_invaddr++; 7500105197Ssam error = EINVAL; 7501105197Ssam goto senderror; 7502105197Ssam } 7503105197Ssam break; 7504105197Ssam default: 7505120585Ssam ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 7506120585Ssam __func__)); 7507181803Sbz V_pfkeystat.out_invaddr++; 7508105197Ssam error = EAFNOSUPPORT; 7509105197Ssam goto senderror; 7510105197Ssam } 7511105197Ssam 7512105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7513105197Ssam case AF_INET: 7514105197Ssam plen = sizeof(struct in_addr) << 3; 7515105197Ssam break; 7516105197Ssam case AF_INET6: 7517105197Ssam plen = sizeof(struct in6_addr) << 3; 7518105197Ssam break; 7519105197Ssam default: 7520105197Ssam plen = 0; /*fool gcc*/ 7521105197Ssam break; 7522105197Ssam } 7523105197Ssam 7524105197Ssam /* check max prefix length */ 7525105197Ssam if (src0->sadb_address_prefixlen > plen || 7526105197Ssam dst0->sadb_address_prefixlen > plen) { 7527120585Ssam ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n", 7528120585Ssam __func__)); 7529181803Sbz V_pfkeystat.out_invaddr++; 7530105197Ssam error = EINVAL; 7531105197Ssam goto senderror; 7532105197Ssam } 7533105197Ssam 7534105197Ssam /* 7535105197Ssam * prefixlen == 0 is valid because there can be a case when 7536105197Ssam * all addresses are matched. 7537105197Ssam */ 7538105197Ssam } 7539105197Ssam 7540105197Ssam if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7541105197Ssam key_typesw[msg->sadb_msg_type] == NULL) { 7542181803Sbz V_pfkeystat.out_invmsgtype++; 7543105197Ssam error = EINVAL; 7544105197Ssam goto senderror; 7545105197Ssam } 7546105197Ssam 7547105197Ssam return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7548105197Ssam 7549105197Ssamsenderror: 7550105197Ssam msg->sadb_msg_errno = error; 7551105197Ssam return key_sendup_mbuf(so, m, target); 7552105197Ssam} 7553105197Ssam 7554105197Ssamstatic int 7555105197Ssamkey_senderror(so, m, code) 7556105197Ssam struct socket *so; 7557105197Ssam struct mbuf *m; 7558105197Ssam int code; 7559105197Ssam{ 7560105197Ssam struct sadb_msg *msg; 7561105197Ssam 7562120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7563120585Ssam ("mbuf too small, len %u", m->m_len)); 7564105197Ssam 7565105197Ssam msg = mtod(m, struct sadb_msg *); 7566105197Ssam msg->sadb_msg_errno = code; 7567105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7568105197Ssam} 7569105197Ssam 7570105197Ssam/* 7571105197Ssam * set the pointer to each header into message buffer. 7572105197Ssam * m will be freed on error. 7573105197Ssam * XXX larger-than-MCLBYTES extension? 7574105197Ssam */ 7575105197Ssamstatic int 7576105197Ssamkey_align(m, mhp) 7577105197Ssam struct mbuf *m; 7578105197Ssam struct sadb_msghdr *mhp; 7579105197Ssam{ 7580105197Ssam struct mbuf *n; 7581105197Ssam struct sadb_ext *ext; 7582105197Ssam size_t off, end; 7583105197Ssam int extlen; 7584105197Ssam int toff; 7585105197Ssam 7586120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7587120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7588120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7589120585Ssam ("mbuf too small, len %u", m->m_len)); 7590105197Ssam 7591105197Ssam /* initialize */ 7592105197Ssam bzero(mhp, sizeof(*mhp)); 7593105197Ssam 7594105197Ssam mhp->msg = mtod(m, struct sadb_msg *); 7595105197Ssam mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7596105197Ssam 7597105197Ssam end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7598105197Ssam extlen = end; /*just in case extlen is not updated*/ 7599105197Ssam for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7600105197Ssam n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7601105197Ssam if (!n) { 7602105197Ssam /* m is already freed */ 7603105197Ssam return ENOBUFS; 7604105197Ssam } 7605105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7606105197Ssam 7607105197Ssam /* set pointer */ 7608105197Ssam switch (ext->sadb_ext_type) { 7609105197Ssam case SADB_EXT_SA: 7610105197Ssam case SADB_EXT_ADDRESS_SRC: 7611105197Ssam case SADB_EXT_ADDRESS_DST: 7612105197Ssam case SADB_EXT_ADDRESS_PROXY: 7613105197Ssam case SADB_EXT_LIFETIME_CURRENT: 7614105197Ssam case SADB_EXT_LIFETIME_HARD: 7615105197Ssam case SADB_EXT_LIFETIME_SOFT: 7616105197Ssam case SADB_EXT_KEY_AUTH: 7617105197Ssam case SADB_EXT_KEY_ENCRYPT: 7618105197Ssam case SADB_EXT_IDENTITY_SRC: 7619105197Ssam case SADB_EXT_IDENTITY_DST: 7620105197Ssam case SADB_EXT_SENSITIVITY: 7621105197Ssam case SADB_EXT_PROPOSAL: 7622105197Ssam case SADB_EXT_SUPPORTED_AUTH: 7623105197Ssam case SADB_EXT_SUPPORTED_ENCRYPT: 7624105197Ssam case SADB_EXT_SPIRANGE: 7625105197Ssam case SADB_X_EXT_POLICY: 7626105197Ssam case SADB_X_EXT_SA2: 7627194062Svanhu#ifdef IPSEC_NAT_T 7628194062Svanhu case SADB_X_EXT_NAT_T_TYPE: 7629194062Svanhu case SADB_X_EXT_NAT_T_SPORT: 7630194062Svanhu case SADB_X_EXT_NAT_T_DPORT: 7631194062Svanhu case SADB_X_EXT_NAT_T_OAI: 7632194062Svanhu case SADB_X_EXT_NAT_T_OAR: 7633194062Svanhu case SADB_X_EXT_NAT_T_FRAG: 7634194062Svanhu#endif 7635105197Ssam /* duplicate check */ 7636105197Ssam /* 7637105197Ssam * XXX Are there duplication payloads of either 7638105197Ssam * KEY_AUTH or KEY_ENCRYPT ? 7639105197Ssam */ 7640105197Ssam if (mhp->ext[ext->sadb_ext_type] != NULL) { 7641120585Ssam ipseclog((LOG_DEBUG, "%s: duplicate ext_type " 7642120585Ssam "%u\n", __func__, ext->sadb_ext_type)); 7643105197Ssam m_freem(m); 7644181803Sbz V_pfkeystat.out_dupext++; 7645105197Ssam return EINVAL; 7646105197Ssam } 7647105197Ssam break; 7648105197Ssam default: 7649120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 7650120585Ssam __func__, ext->sadb_ext_type)); 7651105197Ssam m_freem(m); 7652181803Sbz V_pfkeystat.out_invexttype++; 7653105197Ssam return EINVAL; 7654105197Ssam } 7655105197Ssam 7656105197Ssam extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7657105197Ssam 7658105197Ssam if (key_validate_ext(ext, extlen)) { 7659105197Ssam m_freem(m); 7660181803Sbz V_pfkeystat.out_invlen++; 7661105197Ssam return EINVAL; 7662105197Ssam } 7663105197Ssam 7664105197Ssam n = m_pulldown(m, off, extlen, &toff); 7665105197Ssam if (!n) { 7666105197Ssam /* m is already freed */ 7667105197Ssam return ENOBUFS; 7668105197Ssam } 7669105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7670105197Ssam 7671105197Ssam mhp->ext[ext->sadb_ext_type] = ext; 7672105197Ssam mhp->extoff[ext->sadb_ext_type] = off; 7673105197Ssam mhp->extlen[ext->sadb_ext_type] = extlen; 7674105197Ssam } 7675105197Ssam 7676105197Ssam if (off != end) { 7677105197Ssam m_freem(m); 7678181803Sbz V_pfkeystat.out_invlen++; 7679105197Ssam return EINVAL; 7680105197Ssam } 7681105197Ssam 7682105197Ssam return 0; 7683105197Ssam} 7684105197Ssam 7685105197Ssamstatic int 7686105197Ssamkey_validate_ext(ext, len) 7687105197Ssam const struct sadb_ext *ext; 7688105197Ssam int len; 7689105197Ssam{ 7690105197Ssam const struct sockaddr *sa; 7691105197Ssam enum { NONE, ADDR } checktype = NONE; 7692105197Ssam int baselen = 0; 7693105197Ssam const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7694105197Ssam 7695105197Ssam if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7696105197Ssam return EINVAL; 7697105197Ssam 7698105197Ssam /* if it does not match minimum/maximum length, bail */ 7699105197Ssam if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7700105197Ssam ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7701105197Ssam return EINVAL; 7702105197Ssam if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7703105197Ssam return EINVAL; 7704105197Ssam if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7705105197Ssam return EINVAL; 7706105197Ssam 7707105197Ssam /* more checks based on sadb_ext_type XXX need more */ 7708105197Ssam switch (ext->sadb_ext_type) { 7709105197Ssam case SADB_EXT_ADDRESS_SRC: 7710105197Ssam case SADB_EXT_ADDRESS_DST: 7711105197Ssam case SADB_EXT_ADDRESS_PROXY: 7712105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7713105197Ssam checktype = ADDR; 7714105197Ssam break; 7715105197Ssam case SADB_EXT_IDENTITY_SRC: 7716105197Ssam case SADB_EXT_IDENTITY_DST: 7717105197Ssam if (((const struct sadb_ident *)ext)->sadb_ident_type == 7718105197Ssam SADB_X_IDENTTYPE_ADDR) { 7719105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7720105197Ssam checktype = ADDR; 7721105197Ssam } else 7722105197Ssam checktype = NONE; 7723105197Ssam break; 7724105197Ssam default: 7725105197Ssam checktype = NONE; 7726105197Ssam break; 7727105197Ssam } 7728105197Ssam 7729105197Ssam switch (checktype) { 7730105197Ssam case NONE: 7731105197Ssam break; 7732105197Ssam case ADDR: 7733105197Ssam sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7734105197Ssam if (len < baselen + sal) 7735105197Ssam return EINVAL; 7736105197Ssam if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7737105197Ssam return EINVAL; 7738105197Ssam break; 7739105197Ssam } 7740105197Ssam 7741105197Ssam return 0; 7742105197Ssam} 7743105197Ssam 7744105197Ssamvoid 7745180086Sjuliankey_init(void) 7746105197Ssam{ 7747105197Ssam int i; 7748105197Ssam 7749119643Ssam for (i = 0; i < IPSEC_DIR_MAX; i++) 7750181803Sbz LIST_INIT(&V_sptree[i]); 7751105197Ssam 7752181803Sbz LIST_INIT(&V_sahtree); 7753105197Ssam 7754119643Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) 7755181803Sbz LIST_INIT(&V_regtree[i]); 7756105197Ssam 7757181803Sbz LIST_INIT(&V_acqtree); 7758181803Sbz LIST_INIT(&V_spacqtree); 7759105197Ssam 7760105197Ssam /* system default */ 7761181803Sbz V_ip4_def_policy.policy = IPSEC_POLICY_NONE; 7762181803Sbz V_ip4_def_policy.refcnt++; /*never reclaim this*/ 7763105197Ssam 7764190787Szec if (!IS_DEFAULT_VNET(curvnet)) 7765190787Szec return; 7766190787Szec 7767190787Szec SPTREE_LOCK_INIT(); 7768190787Szec REGTREE_LOCK_INIT(); 7769190787Szec SAHTREE_LOCK_INIT(); 7770190787Szec ACQ_LOCK_INIT(); 7771190787Szec SPACQ_LOCK_INIT(); 7772190787Szec 7773105197Ssam#ifndef IPSEC_DEBUG2 7774105197Ssam timeout((void *)key_timehandler, (void *)0, hz); 7775105197Ssam#endif /*IPSEC_DEBUG2*/ 7776105197Ssam 7777105197Ssam /* initialize key statistics */ 7778105197Ssam keystat.getspi_count = 1; 7779105197Ssam 7780177173Sbz printf("IPsec: Initialized Security Association Processing.\n"); 7781193731Szec} 7782105197Ssam 7783193731Szec#ifdef VIMAGE 7784193731Szecvoid 7785193731Szeckey_destroy(void) 7786193731Szec{ 7787193731Szec struct secpolicy *sp, *nextsp; 7788205789Sbz struct secacq *acq, *nextacq; 7789205789Sbz struct secspacq *spacq, *nextspacq; 7790193731Szec struct secashead *sah, *nextsah; 7791193731Szec struct secreg *reg; 7792193731Szec int i; 7793193731Szec 7794193731Szec SPTREE_LOCK(); 7795193731Szec for (i = 0; i < IPSEC_DIR_MAX; i++) { 7796193731Szec for (sp = LIST_FIRST(&V_sptree[i]); 7797193731Szec sp != NULL; sp = nextsp) { 7798193731Szec nextsp = LIST_NEXT(sp, chain); 7799193731Szec if (__LIST_CHAINED(sp)) { 7800193731Szec LIST_REMOVE(sp, chain); 7801193731Szec free(sp, M_IPSEC_SP); 7802193731Szec } 7803193731Szec } 7804193731Szec } 7805193731Szec SPTREE_UNLOCK(); 7806193731Szec 7807193731Szec SAHTREE_LOCK(); 7808193731Szec for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) { 7809193731Szec nextsah = LIST_NEXT(sah, chain); 7810193731Szec if (__LIST_CHAINED(sah)) { 7811193731Szec LIST_REMOVE(sah, chain); 7812193731Szec free(sah, M_IPSEC_SAH); 7813193731Szec } 7814193731Szec } 7815193731Szec SAHTREE_UNLOCK(); 7816193731Szec 7817193731Szec REGTREE_LOCK(); 7818193731Szec for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7819193731Szec LIST_FOREACH(reg, &V_regtree[i], chain) { 7820193731Szec if (__LIST_CHAINED(reg)) { 7821193731Szec LIST_REMOVE(reg, chain); 7822193731Szec free(reg, M_IPSEC_SAR); 7823193731Szec break; 7824193731Szec } 7825193731Szec } 7826193731Szec } 7827193731Szec REGTREE_UNLOCK(); 7828193731Szec 7829193731Szec ACQ_LOCK(); 7830205789Sbz for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 7831193731Szec nextacq = LIST_NEXT(acq, chain); 7832193731Szec if (__LIST_CHAINED(acq)) { 7833193731Szec LIST_REMOVE(acq, chain); 7834193731Szec free(acq, M_IPSEC_SAQ); 7835193731Szec } 7836193731Szec } 7837193731Szec ACQ_UNLOCK(); 7838193731Szec 7839193731Szec SPACQ_LOCK(); 7840205789Sbz for (spacq = LIST_FIRST(&V_spacqtree); spacq != NULL; 7841205789Sbz spacq = nextspacq) { 7842205789Sbz nextspacq = LIST_NEXT(spacq, chain); 7843205789Sbz if (__LIST_CHAINED(spacq)) { 7844205789Sbz LIST_REMOVE(spacq, chain); 7845205789Sbz free(spacq, M_IPSEC_SAQ); 7846193731Szec } 7847193731Szec } 7848193731Szec SPACQ_UNLOCK(); 7849105197Ssam} 7850193731Szec#endif 7851105197Ssam 7852105197Ssam/* 7853105197Ssam * XXX: maybe This function is called after INBOUND IPsec processing. 7854105197Ssam * 7855105197Ssam * Special check for tunnel-mode packets. 7856105197Ssam * We must make some checks for consistency between inner and outer IP header. 7857105197Ssam * 7858105197Ssam * xxx more checks to be provided 7859105197Ssam */ 7860105197Ssamint 7861105197Ssamkey_checktunnelsanity(sav, family, src, dst) 7862105197Ssam struct secasvar *sav; 7863105197Ssam u_int family; 7864105197Ssam caddr_t src; 7865105197Ssam caddr_t dst; 7866105197Ssam{ 7867120585Ssam IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7868105197Ssam 7869105197Ssam /* XXX: check inner IP header */ 7870105197Ssam 7871105197Ssam return 1; 7872105197Ssam} 7873105197Ssam 7874105197Ssam/* record data transfer on SA, and update timestamps */ 7875105197Ssamvoid 7876105197Ssamkey_sa_recordxfer(sav, m) 7877105197Ssam struct secasvar *sav; 7878105197Ssam struct mbuf *m; 7879105197Ssam{ 7880120585Ssam IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7881120585Ssam IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7882105197Ssam if (!sav->lft_c) 7883105197Ssam return; 7884105197Ssam 7885105197Ssam /* 7886105197Ssam * XXX Currently, there is a difference of bytes size 7887105197Ssam * between inbound and outbound processing. 7888105197Ssam */ 7889157123Sgnn sav->lft_c->bytes += m->m_pkthdr.len; 7890105197Ssam /* to check bytes lifetime is done in key_timehandler(). */ 7891105197Ssam 7892105197Ssam /* 7893105197Ssam * We use the number of packets as the unit of 7894157123Sgnn * allocations. We increment the variable 7895105197Ssam * whenever {esp,ah}_{in,out}put is called. 7896105197Ssam */ 7897157123Sgnn sav->lft_c->allocations++; 7898105197Ssam /* XXX check for expires? */ 7899105197Ssam 7900105197Ssam /* 7901157123Sgnn * NOTE: We record CURRENT usetime by using wall clock, 7902105197Ssam * in seconds. HARD and SOFT lifetime are measured by the time 7903157123Sgnn * difference (again in seconds) from usetime. 7904105197Ssam * 7905105197Ssam * usetime 7906105197Ssam * v expire expire 7907105197Ssam * -----+-----+--------+---> t 7908105197Ssam * <--------------> HARD 7909105197Ssam * <-----> SOFT 7910105197Ssam */ 7911157123Sgnn sav->lft_c->usetime = time_second; 7912105197Ssam /* XXX check for expires? */ 7913105197Ssam 7914105197Ssam return; 7915105197Ssam} 7916105197Ssam 7917105197Ssam/* dumb version */ 7918105197Ssamvoid 7919105197Ssamkey_sa_routechange(dst) 7920105197Ssam struct sockaddr *dst; 7921105197Ssam{ 7922105197Ssam struct secashead *sah; 7923105197Ssam struct route *ro; 7924105197Ssam 7925120585Ssam SAHTREE_LOCK(); 7926181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7927105197Ssam ro = &sah->sa_route; 7928105197Ssam if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7929105197Ssam && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7930105197Ssam RTFREE(ro->ro_rt); 7931105197Ssam ro->ro_rt = (struct rtentry *)NULL; 7932105197Ssam } 7933105197Ssam } 7934120585Ssam SAHTREE_UNLOCK(); 7935105197Ssam} 7936105197Ssam 7937105197Ssamstatic void 7938189004Srdivackykey_sa_chgstate(struct secasvar *sav, u_int8_t state) 7939105197Ssam{ 7940120585Ssam IPSEC_ASSERT(sav != NULL, ("NULL sav")); 7941120585Ssam SAHTREE_LOCK_ASSERT(); 7942105197Ssam 7943119643Ssam if (sav->state != state) { 7944119643Ssam if (__LIST_CHAINED(sav)) 7945119643Ssam LIST_REMOVE(sav, chain); 7946119643Ssam sav->state = state; 7947119643Ssam LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7948119643Ssam } 7949105197Ssam} 7950105197Ssam 7951105197Ssamvoid 7952105197Ssamkey_sa_stir_iv(sav) 7953105197Ssam struct secasvar *sav; 7954105197Ssam{ 7955105197Ssam 7956120585Ssam IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 7957105197Ssam key_randomfill(sav->iv, sav->ivlen); 7958105197Ssam} 7959105197Ssam 7960105197Ssam/* XXX too much? */ 7961105197Ssamstatic struct mbuf * 7962105197Ssamkey_alloc_mbuf(l) 7963105197Ssam int l; 7964105197Ssam{ 7965105197Ssam struct mbuf *m = NULL, *n; 7966105197Ssam int len, t; 7967105197Ssam 7968105197Ssam len = l; 7969105197Ssam while (len > 0) { 7970111119Simp MGET(n, M_DONTWAIT, MT_DATA); 7971105197Ssam if (n && len > MLEN) 7972111119Simp MCLGET(n, M_DONTWAIT); 7973105197Ssam if (!n) { 7974105197Ssam m_freem(m); 7975105197Ssam return NULL; 7976105197Ssam } 7977105197Ssam 7978105197Ssam n->m_next = NULL; 7979105197Ssam n->m_len = 0; 7980105197Ssam n->m_len = M_TRAILINGSPACE(n); 7981105197Ssam /* use the bottom of mbuf, hoping we can prepend afterwards */ 7982105197Ssam if (n->m_len > len) { 7983105197Ssam t = (n->m_len - len) & ~(sizeof(long) - 1); 7984105197Ssam n->m_data += t; 7985105197Ssam n->m_len = len; 7986105197Ssam } 7987105197Ssam 7988105197Ssam len -= n->m_len; 7989105197Ssam 7990105197Ssam if (m) 7991105197Ssam m_cat(m, n); 7992105197Ssam else 7993105197Ssam m = n; 7994105197Ssam } 7995105197Ssam 7996105197Ssam return m; 7997105197Ssam} 7998157123Sgnn 7999157123Sgnn/* 8000157123Sgnn * Take one of the kernel's security keys and convert it into a PF_KEY 8001157123Sgnn * structure within an mbuf, suitable for sending up to a waiting 8002157123Sgnn * application in user land. 8003157123Sgnn * 8004157123Sgnn * IN: 8005157123Sgnn * src: A pointer to a kernel security key. 8006157123Sgnn * exttype: Which type of key this is. Refer to the PF_KEY data structures. 8007157123Sgnn * OUT: 8008157123Sgnn * a valid mbuf or NULL indicating an error 8009157123Sgnn * 8010157123Sgnn */ 8011157123Sgnn 8012157123Sgnnstatic struct mbuf * 8013157123Sgnnkey_setkey(struct seckey *src, u_int16_t exttype) 8014157123Sgnn{ 8015157123Sgnn struct mbuf *m; 8016157123Sgnn struct sadb_key *p; 8017170799Sbz int len; 8018157123Sgnn 8019157123Sgnn if (src == NULL) 8020157123Sgnn return NULL; 8021157123Sgnn 8022170799Sbz len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); 8023157123Sgnn m = key_alloc_mbuf(len); 8024157123Sgnn if (m == NULL) 8025157123Sgnn return NULL; 8026157123Sgnn p = mtod(m, struct sadb_key *); 8027157123Sgnn bzero(p, len); 8028157123Sgnn p->sadb_key_len = PFKEY_UNIT64(len); 8029157123Sgnn p->sadb_key_exttype = exttype; 8030157123Sgnn p->sadb_key_bits = src->bits; 8031157123Sgnn bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src)); 8032157123Sgnn 8033157123Sgnn return m; 8034157123Sgnn} 8035157123Sgnn 8036157123Sgnn/* 8037157123Sgnn * Take one of the kernel's lifetime data structures and convert it 8038157123Sgnn * into a PF_KEY structure within an mbuf, suitable for sending up to 8039157123Sgnn * a waiting application in user land. 8040157123Sgnn * 8041157123Sgnn * IN: 8042157123Sgnn * src: A pointer to a kernel lifetime structure. 8043157123Sgnn * exttype: Which type of lifetime this is. Refer to the PF_KEY 8044157123Sgnn * data structures for more information. 8045157123Sgnn * OUT: 8046157123Sgnn * a valid mbuf or NULL indicating an error 8047157123Sgnn * 8048157123Sgnn */ 8049157123Sgnn 8050157123Sgnnstatic struct mbuf * 8051157123Sgnnkey_setlifetime(struct seclifetime *src, u_int16_t exttype) 8052157123Sgnn{ 8053157123Sgnn struct mbuf *m = NULL; 8054157123Sgnn struct sadb_lifetime *p; 8055157123Sgnn int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime)); 8056157123Sgnn 8057157123Sgnn if (src == NULL) 8058157123Sgnn return NULL; 8059157123Sgnn 8060157123Sgnn m = key_alloc_mbuf(len); 8061157123Sgnn if (m == NULL) 8062157123Sgnn return m; 8063157123Sgnn p = mtod(m, struct sadb_lifetime *); 8064157123Sgnn 8065157123Sgnn bzero(p, len); 8066157123Sgnn p->sadb_lifetime_len = PFKEY_UNIT64(len); 8067157123Sgnn p->sadb_lifetime_exttype = exttype; 8068157123Sgnn p->sadb_lifetime_allocations = src->allocations; 8069157123Sgnn p->sadb_lifetime_bytes = src->bytes; 8070157123Sgnn p->sadb_lifetime_addtime = src->addtime; 8071157123Sgnn p->sadb_lifetime_usetime = src->usetime; 8072157123Sgnn 8073157123Sgnn return m; 8074157123Sgnn 8075157123Sgnn} 8076