key.c revision 195727
1105197Ssam/* $FreeBSD: head/sys/netipsec/key.c 195727 2009-07-16 21:13:04Z rwatson $ */ 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> 59183550Szec#include <sys/vimage.h> 60105197Ssam 61105197Ssam#include <net/if.h> 62105197Ssam#include <net/route.h> 63105197Ssam#include <net/raw_cb.h> 64195699Srwatson#include <net/vnet.h> 65105197Ssam 66105197Ssam#include <netinet/in.h> 67105197Ssam#include <netinet/in_systm.h> 68105197Ssam#include <netinet/ip.h> 69105197Ssam#include <netinet/in_var.h> 70105197Ssam 71105197Ssam#ifdef INET6 72105197Ssam#include <netinet/ip6.h> 73105197Ssam#include <netinet6/in6_var.h> 74105197Ssam#include <netinet6/ip6_var.h> 75105197Ssam#endif /* INET6 */ 76105197Ssam 77105197Ssam#ifdef INET 78105197Ssam#include <netinet/in_pcb.h> 79105197Ssam#endif 80105197Ssam#ifdef INET6 81105197Ssam#include <netinet6/in6_pcb.h> 82105197Ssam#endif /* INET6 */ 83105197Ssam 84105197Ssam#include <net/pfkeyv2.h> 85105197Ssam#include <netipsec/keydb.h> 86105197Ssam#include <netipsec/key.h> 87105197Ssam#include <netipsec/keysock.h> 88105197Ssam#include <netipsec/key_debug.h> 89105197Ssam 90105197Ssam#include <netipsec/ipsec.h> 91105197Ssam#ifdef INET6 92105197Ssam#include <netipsec/ipsec6.h> 93105197Ssam#endif 94105197Ssam 95105197Ssam#include <netipsec/xform.h> 96105197Ssam 97105197Ssam#include <machine/stdarg.h> 98105197Ssam 99105197Ssam/* randomness */ 100105197Ssam#include <sys/random.h> 101105197Ssam 102105197Ssam#define FULLMASK 0xff 103105197Ssam#define _BITS(bytes) ((bytes) << 3) 104105197Ssam 105105197Ssam/* 106105197Ssam * Note on SA reference counting: 107105197Ssam * - SAs that are not in DEAD state will have (total external reference + 1) 108105197Ssam * following value in reference count field. they cannot be freed and are 109105197Ssam * referenced from SA header. 110105197Ssam * - SAs that are in DEAD state will have (total external reference) 111105197Ssam * in reference count field. they are ready to be freed. reference from 112105197Ssam * SA header will be removed in key_delsav(), when the reference count 113105197Ssam * field hits 0 (= no external reference other than from SA header. 114105197Ssam */ 115105197Ssam 116195699SrwatsonVNET_DEFINE(u_int32_t, key_debug_level) = 0; 117195699Srwatsonstatic VNET_DEFINE(u_int, key_spi_trycnt) = 1000; 118195727Srwatson#define V_key_spi_trycnt VNET(key_spi_trycnt) 119195699Srwatsonstatic VNET_DEFINE(u_int32_t, key_spi_minval) = 0x100; 120195727Srwatson#define V_key_spi_minval VNET(key_spi_minval) 121195699Srwatsonstatic VNET_DEFINE(u_int32_t, key_spi_maxval) = 0x0fffffff; /* XXX */ 122195727Srwatson#define V_key_spi_maxval VNET(key_spi_maxval) 123195699Srwatsonstatic VNET_DEFINE(u_int32_t, policy_id) = 0; 124195727Srwatson#define V_policy_id VNET(policy_id) 125195699Srwatson/*interval to initialize randseed,1(m)*/ 126195699Srwatsonstatic VNET_DEFINE(u_int, key_int_random) = 60; 127195727Srwatson#define V_key_int_random VNET(key_int_random) 128195699Srwatson/* interval to expire acquiring, 30(s)*/ 129195699Srwatsonstatic VNET_DEFINE(u_int, key_larval_lifetime) = 30; 130195727Srwatson#define V_key_larval_lifetime VNET(key_larval_lifetime) 131195699Srwatson/* counter for blocking SADB_ACQUIRE.*/ 132195699Srwatsonstatic VNET_DEFINE(int, key_blockacq_count) = 10; 133195727Srwatson#define V_key_blockacq_count VNET(key_blockacq_count) 134195699Srwatson/* lifetime for blocking SADB_ACQUIRE.*/ 135195699Srwatsonstatic VNET_DEFINE(int, key_blockacq_lifetime) = 20; 136195727Srwatson#define V_key_blockacq_lifetime VNET(key_blockacq_lifetime) 137195699Srwatson/* preferred old sa rather than new sa.*/ 138195699Srwatsonstatic VNET_DEFINE(int, key_preferred_oldsa) = 1; 139195727Srwatson#define V_key_preferred_oldsa VNET(key_preferred_oldsa) 140105197Ssam 141195699Srwatsonstatic VNET_DEFINE(u_int32_t, acq_seq) = 0; 142195727Srwatson#define V_acq_seq VNET(acq_seq) 143105197Ssam 144195699Srwatson /* SPD */ 145195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(_sptree, secpolicy), sptree[IPSEC_DIR_MAX]); 146195727Srwatson#define V_sptree VNET(sptree) 147119643Ssamstatic struct mtx sptree_lock; 148120585Ssam#define SPTREE_LOCK_INIT() \ 149120585Ssam mtx_init(&sptree_lock, "sptree", \ 150120585Ssam "fast ipsec security policy database", MTX_DEF) 151120585Ssam#define SPTREE_LOCK_DESTROY() mtx_destroy(&sptree_lock) 152120585Ssam#define SPTREE_LOCK() mtx_lock(&sptree_lock) 153120585Ssam#define SPTREE_UNLOCK() mtx_unlock(&sptree_lock) 154120585Ssam#define SPTREE_LOCK_ASSERT() mtx_assert(&sptree_lock, MA_OWNED) 155120585Ssam 156195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(_sahtree, secashead), sahtree); /* SAD */ 157195727Srwatson#define V_sahtree VNET(sahtree) 158119643Ssamstatic struct mtx sahtree_lock; 159120585Ssam#define SAHTREE_LOCK_INIT() \ 160120585Ssam mtx_init(&sahtree_lock, "sahtree", \ 161120585Ssam "fast ipsec security association database", MTX_DEF) 162120585Ssam#define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock) 163120585Ssam#define SAHTREE_LOCK() mtx_lock(&sahtree_lock) 164120585Ssam#define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock) 165120585Ssam#define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED) 166120585Ssam 167119643Ssam /* registed list */ 168195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(_regtree, secreg), regtree[SADB_SATYPE_MAX + 1]); 169195727Srwatson#define V_regtree VNET(regtree) 170119643Ssamstatic struct mtx regtree_lock; 171120585Ssam#define REGTREE_LOCK_INIT() \ 172120585Ssam mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF) 173120585Ssam#define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock) 174120585Ssam#define REGTREE_LOCK() mtx_lock(®tree_lock) 175120585Ssam#define REGTREE_UNLOCK() mtx_unlock(®tree_lock) 176120585Ssam#define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED) 177120585Ssam 178195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(_acqtree, secacq), acqtree); /* acquiring list */ 179195727Srwatson#define V_acqtree VNET(acqtree) 180119643Ssamstatic struct mtx acq_lock; 181120585Ssam#define ACQ_LOCK_INIT() \ 182120585Ssam mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF) 183120585Ssam#define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock) 184120585Ssam#define ACQ_LOCK() mtx_lock(&acq_lock) 185120585Ssam#define ACQ_UNLOCK() mtx_unlock(&acq_lock) 186120585Ssam#define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED) 187120585Ssam 188195699Srwatson /* SP acquiring list */ 189195699Srwatsonstatic VNET_DEFINE(LIST_HEAD(_spacqtree, secspacq), spacqtree); 190195727Srwatson#define V_spacqtree VNET(spacqtree) 191119643Ssamstatic struct mtx spacq_lock; 192120585Ssam#define SPACQ_LOCK_INIT() \ 193120585Ssam mtx_init(&spacq_lock, "spacqtree", \ 194120585Ssam "fast ipsec security policy acquire list", MTX_DEF) 195120585Ssam#define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock) 196120585Ssam#define SPACQ_LOCK() mtx_lock(&spacq_lock) 197120585Ssam#define SPACQ_UNLOCK() mtx_unlock(&spacq_lock) 198120585Ssam#define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED) 199105197Ssam 200105197Ssam/* search order for SAs */ 201128856Ssamstatic const u_int saorder_state_valid_prefer_old[] = { 202105197Ssam SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 203105197Ssam}; 204128856Ssamstatic const u_int saorder_state_valid_prefer_new[] = { 205128856Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 206128856Ssam}; 207185348Szecstatic const u_int saorder_state_alive[] = { 208105197Ssam /* except DEAD */ 209105197Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 210105197Ssam}; 211185348Szecstatic const u_int saorder_state_any[] = { 212105197Ssam SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 213105197Ssam SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 214105197Ssam}; 215105197Ssam 216105197Ssamstatic const int minsize[] = { 217105197Ssam sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 218105197Ssam sizeof(struct sadb_sa), /* SADB_EXT_SA */ 219105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 220105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 221105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 222105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 223105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 224105197Ssam sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 225105197Ssam sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 226105197Ssam sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 227105197Ssam sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 228105197Ssam sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 229105197Ssam sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 230105197Ssam sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 231105197Ssam sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 232105197Ssam sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 233105197Ssam sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 234105197Ssam 0, /* SADB_X_EXT_KMPRIVATE */ 235105197Ssam sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 236105197Ssam sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 237194062Svanhu sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */ 238194062Svanhu sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */ 239194062Svanhu sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */ 240194062Svanhu sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 241194062Svanhu sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 242194062Svanhu sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ 243105197Ssam}; 244105197Ssamstatic const int maxsize[] = { 245105197Ssam sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 246105197Ssam sizeof(struct sadb_sa), /* SADB_EXT_SA */ 247105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 248105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 249105197Ssam sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 250105197Ssam 0, /* SADB_EXT_ADDRESS_SRC */ 251105197Ssam 0, /* SADB_EXT_ADDRESS_DST */ 252105197Ssam 0, /* SADB_EXT_ADDRESS_PROXY */ 253105197Ssam 0, /* SADB_EXT_KEY_AUTH */ 254105197Ssam 0, /* SADB_EXT_KEY_ENCRYPT */ 255105197Ssam 0, /* SADB_EXT_IDENTITY_SRC */ 256105197Ssam 0, /* SADB_EXT_IDENTITY_DST */ 257105197Ssam 0, /* SADB_EXT_SENSITIVITY */ 258105197Ssam 0, /* SADB_EXT_PROPOSAL */ 259105197Ssam 0, /* SADB_EXT_SUPPORTED_AUTH */ 260105197Ssam 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 261105197Ssam sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 262105197Ssam 0, /* SADB_X_EXT_KMPRIVATE */ 263105197Ssam 0, /* SADB_X_EXT_POLICY */ 264105197Ssam sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 265194062Svanhu sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */ 266194062Svanhu sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */ 267194062Svanhu sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */ 268194062Svanhu 0, /* SADB_X_EXT_NAT_T_OAI */ 269194062Svanhu 0, /* SADB_X_EXT_NAT_T_OAR */ 270194062Svanhu sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */ 271105197Ssam}; 272105197Ssam 273195699Srwatsonstatic VNET_DEFINE(int, ipsec_esp_keymin) = 256; 274195727Srwatson#define V_ipsec_esp_keymin VNET(ipsec_esp_keymin) 275195699Srwatsonstatic VNET_DEFINE(int, ipsec_esp_auth) = 0; 276195727Srwatson#define V_ipsec_esp_auth VNET(ipsec_esp_auth) 277195699Srwatsonstatic VNET_DEFINE(int, ipsec_ah_keymin) = 128; 278195727Srwatson#define V_ipsec_ah_keymin VNET(ipsec_ah_keymin) 279195699Srwatson 280105197Ssam#ifdef SYSCTL_DECL 281105197SsamSYSCTL_DECL(_net_key); 282105197Ssam#endif 283105197Ssam 284195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, 285195699Srwatson CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, ""); 286105197Ssam 287105197Ssam/* max count of trial for the decision of spi value */ 288195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, 289195699Srwatson CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, ""); 290105197Ssam 291105197Ssam/* minimum spi value to allocate automatically. */ 292195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MIN_VALUE, 293195699Srwatson spi_minval, CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, ""); 294105197Ssam 295105197Ssam/* maximun spi value to allocate automatically. */ 296195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MAX_VALUE, 297195699Srwatson spi_maxval, CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, ""); 298105197Ssam 299105197Ssam/* interval to initialize randseed */ 300195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_RANDOM_INT, 301195699Srwatson int_random, CTLFLAG_RW, &VNET_NAME(key_int_random), 0, ""); 302105197Ssam 303105197Ssam/* lifetime for larval SA */ 304195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_LARVAL_LIFETIME, 305195699Srwatson larval_lifetime, CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, ""); 306105197Ssam 307105197Ssam/* counter for blocking to send SADB_ACQUIRE to IKEd */ 308195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, 309195699Srwatson blockacq_count, CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, ""); 310105197Ssam 311105197Ssam/* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 312195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, 313195699Srwatson blockacq_lifetime, CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, ""); 314105197Ssam 315105197Ssam/* ESP auth */ 316195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, 317195699Srwatson CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, ""); 318105197Ssam 319105197Ssam/* minimum ESP key length */ 320195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_ESP_KEYMIN, 321195699Srwatson esp_keymin, CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, ""); 322105197Ssam 323105197Ssam/* minimum AH key length */ 324195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, 325195699Srwatson CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, ""); 326105197Ssam 327105197Ssam/* perfered old SA rather than new SA */ 328195699SrwatsonSYSCTL_VNET_INT(_net_key, KEYCTL_PREFERED_OLDSA, 329195699Srwatson preferred_oldsa, CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, ""); 330105197Ssam 331105197Ssam#define __LIST_CHAINED(elm) \ 332105197Ssam (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 333105197Ssam#define LIST_INSERT_TAIL(head, elm, type, field) \ 334105197Ssamdo {\ 335105197Ssam struct type *curelm = LIST_FIRST(head); \ 336105197Ssam if (curelm == NULL) {\ 337105197Ssam LIST_INSERT_HEAD(head, elm, field); \ 338105197Ssam } else { \ 339105197Ssam while (LIST_NEXT(curelm, field)) \ 340105197Ssam curelm = LIST_NEXT(curelm, field);\ 341105197Ssam LIST_INSERT_AFTER(curelm, elm, field);\ 342105197Ssam }\ 343105197Ssam} while (0) 344105197Ssam 345105197Ssam#define KEY_CHKSASTATE(head, sav, name) \ 346105197Ssamdo { \ 347105197Ssam if ((head) != (sav)) { \ 348105197Ssam ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \ 349105197Ssam (name), (head), (sav))); \ 350105197Ssam continue; \ 351105197Ssam } \ 352105197Ssam} while (0) 353105197Ssam 354105197Ssam#define KEY_CHKSPDIR(head, sp, name) \ 355105197Ssamdo { \ 356105197Ssam if ((head) != (sp)) { \ 357105197Ssam ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \ 358105197Ssam "anyway continue.\n", \ 359105197Ssam (name), (head), (sp))); \ 360105197Ssam } \ 361105197Ssam} while (0) 362105197Ssam 363119643SsamMALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association"); 364119643SsamMALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head"); 365119643SsamMALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy"); 366119643SsamMALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request"); 367119643SsamMALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous"); 368119643SsamMALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire"); 369119643SsamMALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire"); 370105197Ssam 371105197Ssam/* 372105197Ssam * set parameters into secpolicyindex buffer. 373105197Ssam * Must allocate secpolicyindex buffer passed to this function. 374105197Ssam */ 375105197Ssam#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ 376105197Ssamdo { \ 377105197Ssam bzero((idx), sizeof(struct secpolicyindex)); \ 378105197Ssam (idx)->dir = (_dir); \ 379105197Ssam (idx)->prefs = (ps); \ 380105197Ssam (idx)->prefd = (pd); \ 381105197Ssam (idx)->ul_proto = (ulp); \ 382105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 383105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 384105197Ssam} while (0) 385105197Ssam 386105197Ssam/* 387105197Ssam * set parameters into secasindex buffer. 388105197Ssam * Must allocate secasindex buffer before calling this function. 389105197Ssam */ 390105197Ssam#define KEY_SETSECASIDX(p, m, r, s, d, idx) \ 391105197Ssamdo { \ 392105197Ssam bzero((idx), sizeof(struct secasindex)); \ 393105197Ssam (idx)->proto = (p); \ 394105197Ssam (idx)->mode = (m); \ 395105197Ssam (idx)->reqid = (r); \ 396105197Ssam bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \ 397105197Ssam bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \ 398105197Ssam} while (0) 399105197Ssam 400105197Ssam/* key statistics */ 401105197Ssamstruct _keystat { 402105197Ssam u_long getspi_count; /* the avarage of count to try to get new SPI */ 403105197Ssam} keystat; 404105197Ssam 405105197Ssamstruct sadb_msghdr { 406105197Ssam struct sadb_msg *msg; 407105197Ssam struct sadb_ext *ext[SADB_EXT_MAX + 1]; 408105197Ssam int extoff[SADB_EXT_MAX + 1]; 409105197Ssam int extlen[SADB_EXT_MAX + 1]; 410105197Ssam}; 411105197Ssam 412105197Ssamstatic struct secasvar *key_allocsa_policy __P((const struct secasindex *)); 413105197Ssamstatic void key_freesp_so __P((struct secpolicy **)); 414105197Ssamstatic struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int)); 415105197Ssamstatic void key_delsp __P((struct secpolicy *)); 416105197Ssamstatic struct secpolicy *key_getsp __P((struct secpolicyindex *)); 417119643Ssamstatic void _key_delsp(struct secpolicy *sp); 418105197Ssamstatic struct secpolicy *key_getspbyid __P((u_int32_t)); 419105197Ssamstatic u_int32_t key_newreqid __P((void)); 420105197Ssamstatic struct mbuf *key_gather_mbuf __P((struct mbuf *, 421105197Ssam const struct sadb_msghdr *, int, int, ...)); 422105197Ssamstatic int key_spdadd __P((struct socket *, struct mbuf *, 423105197Ssam const struct sadb_msghdr *)); 424105197Ssamstatic u_int32_t key_getnewspid __P((void)); 425105197Ssamstatic int key_spddelete __P((struct socket *, struct mbuf *, 426105197Ssam const struct sadb_msghdr *)); 427105197Ssamstatic int key_spddelete2 __P((struct socket *, struct mbuf *, 428105197Ssam const struct sadb_msghdr *)); 429105197Ssamstatic int key_spdget __P((struct socket *, struct mbuf *, 430105197Ssam const struct sadb_msghdr *)); 431105197Ssamstatic int key_spdflush __P((struct socket *, struct mbuf *, 432105197Ssam const struct sadb_msghdr *)); 433105197Ssamstatic int key_spddump __P((struct socket *, struct mbuf *, 434105197Ssam const struct sadb_msghdr *)); 435105197Ssamstatic struct mbuf *key_setdumpsp __P((struct secpolicy *, 436105197Ssam u_int8_t, u_int32_t, u_int32_t)); 437105197Ssamstatic u_int key_getspreqmsglen __P((struct secpolicy *)); 438105197Ssamstatic int key_spdexpire __P((struct secpolicy *)); 439105197Ssamstatic struct secashead *key_newsah __P((struct secasindex *)); 440105197Ssamstatic void key_delsah __P((struct secashead *)); 441105197Ssamstatic struct secasvar *key_newsav __P((struct mbuf *, 442105197Ssam const struct sadb_msghdr *, struct secashead *, int *, 443105197Ssam const char*, int)); 444105197Ssam#define KEY_NEWSAV(m, sadb, sah, e) \ 445105197Ssam key_newsav(m, sadb, sah, e, __FILE__, __LINE__) 446105197Ssamstatic void key_delsav __P((struct secasvar *)); 447105197Ssamstatic struct secashead *key_getsah __P((struct secasindex *)); 448105197Ssamstatic struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t)); 449105197Ssamstatic struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t)); 450105197Ssamstatic int key_setsaval __P((struct secasvar *, struct mbuf *, 451105197Ssam const struct sadb_msghdr *)); 452105197Ssamstatic int key_mature __P((struct secasvar *)); 453105197Ssamstatic struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t, 454105197Ssam u_int8_t, u_int32_t, u_int32_t)); 455105197Ssamstatic struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t, 456105197Ssam u_int32_t, pid_t, u_int16_t)); 457105197Ssamstatic struct mbuf *key_setsadbsa __P((struct secasvar *)); 458105197Ssamstatic struct mbuf *key_setsadbaddr __P((u_int16_t, 459105197Ssam const struct sockaddr *, u_int8_t, u_int16_t)); 460194062Svanhu#ifdef IPSEC_NAT_T 461194062Svanhustatic struct mbuf *key_setsadbxport(u_int16_t, u_int16_t); 462194062Svanhustatic struct mbuf *key_setsadbxtype(u_int16_t); 463194062Svanhu#endif 464194062Svanhustatic void key_porttosaddr(struct sockaddr *, u_int16_t); 465194062Svanhu#define KEY_PORTTOSADDR(saddr, port) \ 466194062Svanhu key_porttosaddr((struct sockaddr *)(saddr), (port)) 467105197Ssamstatic struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t)); 468105197Ssamstatic struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t, 469105197Ssam u_int32_t)); 470157123Sgnnstatic struct seckey *key_dup_keymsg(const struct sadb_key *, u_int, 471157123Sgnn struct malloc_type *); 472157123Sgnnstatic struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src, 473157123Sgnn struct malloc_type *type); 474105197Ssam#ifdef INET6 475105197Ssamstatic int key_ismyaddr6 __P((struct sockaddr_in6 *)); 476105197Ssam#endif 477105197Ssam 478105197Ssam/* flags for key_cmpsaidx() */ 479105197Ssam#define CMP_HEAD 1 /* protocol, addresses. */ 480105197Ssam#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 481105197Ssam#define CMP_REQID 3 /* additionally HEAD, reaid. */ 482105197Ssam#define CMP_EXACTLY 4 /* all elements. */ 483105197Ssamstatic int key_cmpsaidx 484105197Ssam __P((const struct secasindex *, const struct secasindex *, int)); 485105197Ssam 486105197Ssamstatic int key_cmpspidx_exactly 487105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 488105197Ssamstatic int key_cmpspidx_withmask 489105197Ssam __P((struct secpolicyindex *, struct secpolicyindex *)); 490105197Ssamstatic int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int)); 491105197Ssamstatic int key_bbcmp __P((const void *, const void *, u_int)); 492105197Ssamstatic u_int16_t key_satype2proto __P((u_int8_t)); 493105197Ssamstatic u_int8_t key_proto2satype __P((u_int16_t)); 494105197Ssam 495105197Ssamstatic int key_getspi __P((struct socket *, struct mbuf *, 496105197Ssam const struct sadb_msghdr *)); 497105197Ssamstatic u_int32_t key_do_getnewspi __P((struct sadb_spirange *, 498105197Ssam struct secasindex *)); 499105197Ssamstatic int key_update __P((struct socket *, struct mbuf *, 500105197Ssam const struct sadb_msghdr *)); 501105197Ssam#ifdef IPSEC_DOSEQCHECK 502105197Ssamstatic struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t)); 503105197Ssam#endif 504105197Ssamstatic int key_add __P((struct socket *, struct mbuf *, 505105197Ssam const struct sadb_msghdr *)); 506105197Ssamstatic int key_setident __P((struct secashead *, struct mbuf *, 507105197Ssam const struct sadb_msghdr *)); 508105197Ssamstatic struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *, 509105197Ssam const struct sadb_msghdr *)); 510105197Ssamstatic int key_delete __P((struct socket *, struct mbuf *, 511105197Ssam const struct sadb_msghdr *)); 512105197Ssamstatic int key_get __P((struct socket *, struct mbuf *, 513105197Ssam const struct sadb_msghdr *)); 514105197Ssam 515105197Ssamstatic void key_getcomb_setlifetime __P((struct sadb_comb *)); 516105197Ssamstatic struct mbuf *key_getcomb_esp __P((void)); 517105197Ssamstatic struct mbuf *key_getcomb_ah __P((void)); 518105197Ssamstatic struct mbuf *key_getcomb_ipcomp __P((void)); 519105197Ssamstatic struct mbuf *key_getprop __P((const struct secasindex *)); 520105197Ssam 521105197Ssamstatic int key_acquire __P((const struct secasindex *, struct secpolicy *)); 522105197Ssamstatic struct secacq *key_newacq __P((const struct secasindex *)); 523105197Ssamstatic struct secacq *key_getacq __P((const struct secasindex *)); 524105197Ssamstatic struct secacq *key_getacqbyseq __P((u_int32_t)); 525105197Ssamstatic struct secspacq *key_newspacq __P((struct secpolicyindex *)); 526105197Ssamstatic struct secspacq *key_getspacq __P((struct secpolicyindex *)); 527105197Ssamstatic int key_acquire2 __P((struct socket *, struct mbuf *, 528105197Ssam const struct sadb_msghdr *)); 529105197Ssamstatic int key_register __P((struct socket *, struct mbuf *, 530105197Ssam const struct sadb_msghdr *)); 531105197Ssamstatic int key_expire __P((struct secasvar *)); 532105197Ssamstatic int key_flush __P((struct socket *, struct mbuf *, 533105197Ssam const struct sadb_msghdr *)); 534105197Ssamstatic int key_dump __P((struct socket *, struct mbuf *, 535105197Ssam const struct sadb_msghdr *)); 536105197Ssamstatic int key_promisc __P((struct socket *, struct mbuf *, 537105197Ssam const struct sadb_msghdr *)); 538105197Ssamstatic int key_senderror __P((struct socket *, struct mbuf *, int)); 539105197Ssamstatic int key_validate_ext __P((const struct sadb_ext *, int)); 540105197Ssamstatic int key_align __P((struct mbuf *, struct sadb_msghdr *)); 541157123Sgnnstatic struct mbuf *key_setlifetime(struct seclifetime *src, 542157123Sgnn u_int16_t exttype); 543157123Sgnnstatic struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype); 544157123Sgnn 545105197Ssam#if 0 546105197Ssamstatic const char *key_getfqdn __P((void)); 547105197Ssamstatic const char *key_getuserfqdn __P((void)); 548105197Ssam#endif 549105197Ssamstatic void key_sa_chgstate __P((struct secasvar *, u_int8_t)); 550105197Ssamstatic struct mbuf *key_alloc_mbuf __P((int)); 551105197Ssam 552158767Spjdstatic __inline void 553158767Spjdsa_initref(struct secasvar *sav) 554158767Spjd{ 555105197Ssam 556158767Spjd refcount_init(&sav->refcnt, 1); 557158767Spjd} 558158767Spjdstatic __inline void 559158767Spjdsa_addref(struct secasvar *sav) 560158767Spjd{ 561158767Spjd 562158767Spjd refcount_acquire(&sav->refcnt); 563158767Spjd IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow")); 564158767Spjd} 565158767Spjdstatic __inline int 566158767Spjdsa_delref(struct secasvar *sav) 567158767Spjd{ 568158767Spjd 569158767Spjd IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow")); 570158767Spjd return (refcount_release(&sav->refcnt)); 571158767Spjd} 572158767Spjd 573105197Ssam#define SP_ADDREF(p) do { \ 574105197Ssam (p)->refcnt++; \ 575120585Ssam IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \ 576105197Ssam} while (0) 577105197Ssam#define SP_DELREF(p) do { \ 578120585Ssam IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \ 579105197Ssam (p)->refcnt--; \ 580105197Ssam} while (0) 581135947Ssam 582105197Ssam 583105197Ssam/* 584135947Ssam * Update the refcnt while holding the SPTREE lock. 585135947Ssam */ 586135947Ssamvoid 587135947Ssamkey_addref(struct secpolicy *sp) 588135947Ssam{ 589135947Ssam SPTREE_LOCK(); 590135947Ssam SP_ADDREF(sp); 591135947Ssam SPTREE_UNLOCK(); 592135947Ssam} 593135947Ssam 594135947Ssam/* 595105197Ssam * Return 0 when there are known to be no SP's for the specified 596105197Ssam * direction. Otherwise return 1. This is used by IPsec code 597105197Ssam * to optimize performance. 598105197Ssam */ 599105197Ssamint 600105197Ssamkey_havesp(u_int dir) 601105197Ssam{ 602183550Szec 603105197Ssam return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 604181803Sbz LIST_FIRST(&V_sptree[dir]) != NULL : 1); 605105197Ssam} 606105197Ssam 607105197Ssam/* %%% IPsec policy management */ 608105197Ssam/* 609105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 610105197Ssam * Must call key_freesp() later. 611105197Ssam * OUT: NULL: not found 612105197Ssam * others: found and return the pointer. 613105197Ssam */ 614105197Ssamstruct secpolicy * 615105197Ssamkey_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag) 616105197Ssam{ 617105197Ssam struct secpolicy *sp; 618105197Ssam 619120585Ssam IPSEC_ASSERT(spidx != NULL, ("null spidx")); 620120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 621120585Ssam ("invalid direction %u", dir)); 622105197Ssam 623105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 624120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 625105197Ssam 626105197Ssam /* get a SP entry */ 627105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 628105197Ssam printf("*** objects\n"); 629105197Ssam kdebug_secpolicyindex(spidx)); 630105197Ssam 631120585Ssam SPTREE_LOCK(); 632181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 633105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 634105197Ssam printf("*** in SPD\n"); 635105197Ssam kdebug_secpolicyindex(&sp->spidx)); 636105197Ssam 637105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 638105197Ssam continue; 639105197Ssam if (key_cmpspidx_withmask(&sp->spidx, spidx)) 640105197Ssam goto found; 641105197Ssam } 642105197Ssam sp = NULL; 643105197Ssamfound: 644105197Ssam if (sp) { 645105197Ssam /* sanity check */ 646120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 647105197Ssam 648105197Ssam /* found a SPD entry */ 649105197Ssam sp->lastused = time_second; 650105197Ssam SP_ADDREF(sp); 651105197Ssam } 652120585Ssam SPTREE_UNLOCK(); 653105197Ssam 654105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 655120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 656105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 657105197Ssam return sp; 658105197Ssam} 659105197Ssam 660105197Ssam/* 661105197Ssam * allocating a SP for OUTBOUND or INBOUND packet. 662105197Ssam * Must call key_freesp() later. 663105197Ssam * OUT: NULL: not found 664105197Ssam * others: found and return the pointer. 665105197Ssam */ 666105197Ssamstruct secpolicy * 667105197Ssamkey_allocsp2(u_int32_t spi, 668105197Ssam union sockaddr_union *dst, 669105197Ssam u_int8_t proto, 670105197Ssam u_int dir, 671105197Ssam const char* where, int tag) 672105197Ssam{ 673105197Ssam struct secpolicy *sp; 674105197Ssam 675120585Ssam IPSEC_ASSERT(dst != NULL, ("null dst")); 676120585Ssam IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 677120585Ssam ("invalid direction %u", dir)); 678105197Ssam 679105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 680120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 681105197Ssam 682105197Ssam /* get a SP entry */ 683105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 684105197Ssam printf("*** objects\n"); 685105197Ssam printf("spi %u proto %u dir %u\n", spi, proto, dir); 686105197Ssam kdebug_sockaddr(&dst->sa)); 687105197Ssam 688120585Ssam SPTREE_LOCK(); 689181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 690105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_DATA, 691105197Ssam printf("*** in SPD\n"); 692105197Ssam kdebug_secpolicyindex(&sp->spidx)); 693105197Ssam 694105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 695105197Ssam continue; 696105197Ssam /* compare simple values, then dst address */ 697105197Ssam if (sp->spidx.ul_proto != proto) 698105197Ssam continue; 699105197Ssam /* NB: spi's must exist and match */ 700105197Ssam if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi) 701105197Ssam continue; 702105197Ssam if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0) 703105197Ssam goto found; 704105197Ssam } 705105197Ssam sp = NULL; 706105197Ssamfound: 707105197Ssam if (sp) { 708105197Ssam /* sanity check */ 709120585Ssam KEY_CHKSPDIR(sp->spidx.dir, dir, __func__); 710105197Ssam 711105197Ssam /* found a SPD entry */ 712105197Ssam sp->lastused = time_second; 713105197Ssam SP_ADDREF(sp); 714105197Ssam } 715120585Ssam SPTREE_UNLOCK(); 716105197Ssam 717105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 718120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 719105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 720105197Ssam return sp; 721105197Ssam} 722105197Ssam 723191599Sbz#if 0 724105197Ssam/* 725105197Ssam * return a policy that matches this particular inbound packet. 726105197Ssam * XXX slow 727105197Ssam */ 728105197Ssamstruct secpolicy * 729105197Ssamkey_gettunnel(const struct sockaddr *osrc, 730105197Ssam const struct sockaddr *odst, 731105197Ssam const struct sockaddr *isrc, 732105197Ssam const struct sockaddr *idst, 733105197Ssam const char* where, int tag) 734105197Ssam{ 735105197Ssam struct secpolicy *sp; 736105197Ssam const int dir = IPSEC_DIR_INBOUND; 737105197Ssam struct ipsecrequest *r1, *r2, *p; 738105197Ssam struct secpolicyindex spidx; 739105197Ssam 740105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 741120585Ssam printf("DP %s from %s:%u\n", __func__, where, tag)); 742105197Ssam 743105197Ssam if (isrc->sa_family != idst->sa_family) { 744120585Ssam ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.", 745120585Ssam __func__, isrc->sa_family, idst->sa_family)); 746105197Ssam sp = NULL; 747105197Ssam goto done; 748105197Ssam } 749105197Ssam 750120585Ssam SPTREE_LOCK(); 751181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 752105197Ssam if (sp->state == IPSEC_SPSTATE_DEAD) 753105197Ssam continue; 754105197Ssam 755105197Ssam r1 = r2 = NULL; 756105197Ssam for (p = sp->req; p; p = p->next) { 757105197Ssam if (p->saidx.mode != IPSEC_MODE_TUNNEL) 758105197Ssam continue; 759105197Ssam 760105197Ssam r1 = r2; 761105197Ssam r2 = p; 762105197Ssam 763105197Ssam if (!r1) { 764105197Ssam /* here we look at address matches only */ 765105197Ssam spidx = sp->spidx; 766105197Ssam if (isrc->sa_len > sizeof(spidx.src) || 767105197Ssam idst->sa_len > sizeof(spidx.dst)) 768105197Ssam continue; 769105197Ssam bcopy(isrc, &spidx.src, isrc->sa_len); 770105197Ssam bcopy(idst, &spidx.dst, idst->sa_len); 771105197Ssam if (!key_cmpspidx_withmask(&sp->spidx, &spidx)) 772105197Ssam continue; 773105197Ssam } else { 774105197Ssam if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) || 775105197Ssam key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0)) 776105197Ssam continue; 777105197Ssam } 778105197Ssam 779105197Ssam if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) || 780105197Ssam key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0)) 781105197Ssam continue; 782105197Ssam 783105197Ssam goto found; 784105197Ssam } 785105197Ssam } 786105197Ssam sp = NULL; 787105197Ssamfound: 788105197Ssam if (sp) { 789105197Ssam sp->lastused = time_second; 790105197Ssam SP_ADDREF(sp); 791105197Ssam } 792120585Ssam SPTREE_UNLOCK(); 793105197Ssamdone: 794105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 795120585Ssam printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__, 796105197Ssam sp, sp ? sp->id : 0, sp ? sp->refcnt : 0)); 797105197Ssam return sp; 798105197Ssam} 799191599Sbz#endif 800105197Ssam 801105197Ssam/* 802105197Ssam * allocating an SA entry for an *OUTBOUND* packet. 803105197Ssam * checking each request entries in SP, and acquire an SA if need. 804105197Ssam * OUT: 0: there are valid requests. 805105197Ssam * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 806105197Ssam */ 807105197Ssamint 808105197Ssamkey_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx) 809105197Ssam{ 810105197Ssam u_int level; 811105197Ssam int error; 812105197Ssam 813120585Ssam IPSEC_ASSERT(isr != NULL, ("null isr")); 814120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 815120585Ssam IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT || 816105197Ssam saidx->mode == IPSEC_MODE_TUNNEL, 817120585Ssam ("unexpected policy %u", saidx->mode)); 818105197Ssam 819105197Ssam /* 820105197Ssam * XXX guard against protocol callbacks from the crypto 821105197Ssam * thread as they reference ipsecrequest.sav which we 822105197Ssam * temporarily null out below. Need to rethink how we 823105197Ssam * handle bundled SA's in the callback thread. 824105197Ssam */ 825120585Ssam IPSECREQUEST_LOCK_ASSERT(isr); 826119643Ssam 827119643Ssam /* get current level */ 828119643Ssam level = ipsec_get_reqlevel(isr); 829105197Ssam#if 0 830105197Ssam /* 831105197Ssam * We do allocate new SA only if the state of SA in the holder is 832105197Ssam * SADB_SASTATE_DEAD. The SA for outbound must be the oldest. 833105197Ssam */ 834105197Ssam if (isr->sav != NULL) { 835105197Ssam if (isr->sav->sah == NULL) 836120585Ssam panic("%s: sah is null.\n", __func__); 837105197Ssam if (isr->sav == (struct secasvar *)LIST_FIRST( 838105197Ssam &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) { 839105197Ssam KEY_FREESAV(&isr->sav); 840105197Ssam isr->sav = NULL; 841105197Ssam } 842105197Ssam } 843105197Ssam#else 844105197Ssam /* 845105197Ssam * we free any SA stashed in the IPsec request because a different 846105197Ssam * SA may be involved each time this request is checked, either 847105197Ssam * because new SAs are being configured, or this request is 848105197Ssam * associated with an unconnected datagram socket, or this request 849105197Ssam * is associated with a system default policy. 850105197Ssam * 851105197Ssam * The operation may have negative impact to performance. We may 852105197Ssam * want to check cached SA carefully, rather than picking new SA 853105197Ssam * every time. 854105197Ssam */ 855105197Ssam if (isr->sav != NULL) { 856105197Ssam KEY_FREESAV(&isr->sav); 857105197Ssam isr->sav = NULL; 858105197Ssam } 859105197Ssam#endif 860105197Ssam 861105197Ssam /* 862105197Ssam * new SA allocation if no SA found. 863105197Ssam * key_allocsa_policy should allocate the oldest SA available. 864105197Ssam * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt. 865105197Ssam */ 866105197Ssam if (isr->sav == NULL) 867105197Ssam isr->sav = key_allocsa_policy(saidx); 868105197Ssam 869105197Ssam /* When there is SA. */ 870105197Ssam if (isr->sav != NULL) { 871105197Ssam if (isr->sav->state != SADB_SASTATE_MATURE && 872105197Ssam isr->sav->state != SADB_SASTATE_DYING) 873105197Ssam return EINVAL; 874105197Ssam return 0; 875105197Ssam } 876105197Ssam 877105197Ssam /* there is no SA */ 878105197Ssam error = key_acquire(saidx, isr->sp); 879105197Ssam if (error != 0) { 880105197Ssam /* XXX What should I do ? */ 881120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 882120585Ssam __func__, error)); 883105197Ssam return error; 884105197Ssam } 885105197Ssam 886105197Ssam if (level != IPSEC_LEVEL_REQUIRE) { 887105197Ssam /* XXX sigh, the interface to this routine is botched */ 888120585Ssam IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA")); 889105197Ssam return 0; 890105197Ssam } else { 891105197Ssam return ENOENT; 892105197Ssam } 893105197Ssam} 894105197Ssam 895105197Ssam/* 896105197Ssam * allocating a SA for policy entry from SAD. 897105197Ssam * NOTE: searching SAD of aliving state. 898105197Ssam * OUT: NULL: not found. 899105197Ssam * others: found and return the pointer. 900105197Ssam */ 901105197Ssamstatic struct secasvar * 902105197Ssamkey_allocsa_policy(const struct secasindex *saidx) 903105197Ssam{ 904128856Ssam#define N(a) _ARRAYLEN(a) 905105197Ssam struct secashead *sah; 906105197Ssam struct secasvar *sav; 907128856Ssam u_int stateidx, arraysize; 908128856Ssam const u_int *state_valid; 909105197Ssam 910120585Ssam SAHTREE_LOCK(); 911181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 912105197Ssam if (sah->state == SADB_SASTATE_DEAD) 913105197Ssam continue; 914119643Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) { 915181803Sbz if (V_key_preferred_oldsa) { 916128856Ssam state_valid = saorder_state_valid_prefer_old; 917128856Ssam arraysize = N(saorder_state_valid_prefer_old); 918128856Ssam } else { 919128856Ssam state_valid = saorder_state_valid_prefer_new; 920128856Ssam arraysize = N(saorder_state_valid_prefer_new); 921128856Ssam } 922120585Ssam SAHTREE_UNLOCK(); 923105197Ssam goto found; 924119643Ssam } 925105197Ssam } 926120585Ssam SAHTREE_UNLOCK(); 927105197Ssam 928105197Ssam return NULL; 929105197Ssam 930105197Ssam found: 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) { 1885105197Ssam newsp->state = IPSEC_SPSTATE_DEAD; 1886105197Ssam KEY_FREESP(&newsp); 1887105197Ssam } 1888105197Ssam } else { 1889105197Ssam if (newsp != NULL) { 1890105197Ssam KEY_FREESP(&newsp); 1891120585Ssam ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n", 1892120585Ssam __func__)); 1893105197Ssam return key_senderror(so, m, EEXIST); 1894105197Ssam } 1895105197Ssam } 1896105197Ssam 1897105197Ssam /* allocation new SP entry */ 1898105197Ssam if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) { 1899105197Ssam return key_senderror(so, m, error); 1900105197Ssam } 1901105197Ssam 1902105197Ssam if ((newsp->id = key_getnewspid()) == 0) { 1903119643Ssam _key_delsp(newsp); 1904105197Ssam return key_senderror(so, m, ENOBUFS); 1905105197Ssam } 1906105197Ssam 1907105197Ssam /* XXX boundary check against sa_len */ 1908105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 1909105197Ssam src0 + 1, 1910105197Ssam dst0 + 1, 1911105197Ssam src0->sadb_address_prefixlen, 1912105197Ssam dst0->sadb_address_prefixlen, 1913105197Ssam src0->sadb_address_proto, 1914105197Ssam &newsp->spidx); 1915105197Ssam 1916105197Ssam /* sanity check on addr pair */ 1917105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_family != 1918105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_family) { 1919119643Ssam _key_delsp(newsp); 1920105197Ssam return key_senderror(so, m, EINVAL); 1921105197Ssam } 1922105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 1923105197Ssam ((struct sockaddr *)(dst0+ 1))->sa_len) { 1924119643Ssam _key_delsp(newsp); 1925105197Ssam return key_senderror(so, m, EINVAL); 1926105197Ssam } 1927105197Ssam#if 1 1928105197Ssam if (newsp->req && newsp->req->saidx.src.sa.sa_family) { 1929105197Ssam struct sockaddr *sa; 1930105197Ssam sa = (struct sockaddr *)(src0 + 1); 1931105197Ssam if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) { 1932119643Ssam _key_delsp(newsp); 1933105197Ssam return key_senderror(so, m, EINVAL); 1934105197Ssam } 1935105197Ssam } 1936105197Ssam if (newsp->req && newsp->req->saidx.dst.sa.sa_family) { 1937105197Ssam struct sockaddr *sa; 1938105197Ssam sa = (struct sockaddr *)(dst0 + 1); 1939105197Ssam if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) { 1940119643Ssam _key_delsp(newsp); 1941105197Ssam return key_senderror(so, m, EINVAL); 1942105197Ssam } 1943105197Ssam } 1944105197Ssam#endif 1945105197Ssam 1946105197Ssam newsp->created = time_second; 1947105197Ssam newsp->lastused = newsp->created; 1948105197Ssam newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 1949105197Ssam newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 1950105197Ssam 1951105197Ssam newsp->refcnt = 1; /* do not reclaim until I say I do */ 1952105197Ssam newsp->state = IPSEC_SPSTATE_ALIVE; 1953181803Sbz LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain); 1954105197Ssam 1955105197Ssam /* delete the entry in spacqtree */ 1956105197Ssam if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 1957119643Ssam struct secspacq *spacq = key_getspacq(&spidx); 1958119643Ssam if (spacq != NULL) { 1959105197Ssam /* reset counter in order to deletion by timehandler. */ 1960105197Ssam spacq->created = time_second; 1961105197Ssam spacq->count = 0; 1962120585Ssam SPACQ_UNLOCK(); 1963105197Ssam } 1964105197Ssam } 1965105197Ssam 1966105197Ssam { 1967105197Ssam struct mbuf *n, *mpolicy; 1968105197Ssam struct sadb_msg *newmsg; 1969105197Ssam int off; 1970105197Ssam 1971194062Svanhu /* 1972194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 1973194062Svanhu * we are sending traffic endpoints. 1974194062Svanhu */ 1975194062Svanhu 1976105197Ssam /* create new sadb_msg to reply. */ 1977105197Ssam if (lft) { 1978105197Ssam n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 1979105197Ssam SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 1980105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1981105197Ssam } else { 1982105197Ssam n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 1983105197Ssam SADB_X_EXT_POLICY, 1984105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 1985105197Ssam } 1986105197Ssam if (!n) 1987105197Ssam return key_senderror(so, m, ENOBUFS); 1988105197Ssam 1989105197Ssam if (n->m_len < sizeof(*newmsg)) { 1990105197Ssam n = m_pullup(n, sizeof(*newmsg)); 1991105197Ssam if (!n) 1992105197Ssam return key_senderror(so, m, ENOBUFS); 1993105197Ssam } 1994105197Ssam newmsg = mtod(n, struct sadb_msg *); 1995105197Ssam newmsg->sadb_msg_errno = 0; 1996105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 1997105197Ssam 1998105197Ssam off = 0; 1999105197Ssam mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2000105197Ssam sizeof(*xpl), &off); 2001105197Ssam if (mpolicy == NULL) { 2002105197Ssam /* n is already freed */ 2003105197Ssam return key_senderror(so, m, ENOBUFS); 2004105197Ssam } 2005105197Ssam xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off); 2006105197Ssam if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2007105197Ssam m_freem(n); 2008105197Ssam return key_senderror(so, m, EINVAL); 2009105197Ssam } 2010105197Ssam xpl->sadb_x_policy_id = newsp->id; 2011105197Ssam 2012105197Ssam m_freem(m); 2013105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2014105197Ssam } 2015105197Ssam} 2016105197Ssam 2017105197Ssam/* 2018105197Ssam * get new policy id. 2019105197Ssam * OUT: 2020105197Ssam * 0: failure. 2021105197Ssam * others: success. 2022105197Ssam */ 2023105197Ssamstatic u_int32_t 2024105197Ssamkey_getnewspid() 2025105197Ssam{ 2026105197Ssam u_int32_t newid = 0; 2027181803Sbz int count = V_key_spi_trycnt; /* XXX */ 2028105197Ssam struct secpolicy *sp; 2029105197Ssam 2030105197Ssam /* when requesting to allocate spi ranged */ 2031105197Ssam while (count--) { 2032181803Sbz newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1)); 2033105197Ssam 2034105197Ssam if ((sp = key_getspbyid(newid)) == NULL) 2035105197Ssam break; 2036105197Ssam 2037105197Ssam KEY_FREESP(&sp); 2038105197Ssam } 2039105197Ssam 2040105197Ssam if (count == 0 || newid == 0) { 2041120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n", 2042120585Ssam __func__)); 2043105197Ssam return 0; 2044105197Ssam } 2045105197Ssam 2046105197Ssam return newid; 2047105197Ssam} 2048105197Ssam 2049105197Ssam/* 2050105197Ssam * SADB_SPDDELETE processing 2051105197Ssam * receive 2052105197Ssam * <base, address(SD), policy(*)> 2053105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2054105197Ssam * and send, 2055105197Ssam * <base, address(SD), policy(*)> 2056105197Ssam * to the ikmpd. 2057105197Ssam * policy(*) including direction of policy. 2058105197Ssam * 2059105197Ssam * m will always be freed. 2060105197Ssam */ 2061105197Ssamstatic int 2062105197Ssamkey_spddelete(so, m, mhp) 2063105197Ssam struct socket *so; 2064105197Ssam struct mbuf *m; 2065105197Ssam const struct sadb_msghdr *mhp; 2066105197Ssam{ 2067105197Ssam struct sadb_address *src0, *dst0; 2068105197Ssam struct sadb_x_policy *xpl0; 2069105197Ssam struct secpolicyindex spidx; 2070105197Ssam struct secpolicy *sp; 2071105197Ssam 2072120585Ssam IPSEC_ASSERT(so != NULL, ("null so")); 2073120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2074120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2075120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2076105197Ssam 2077105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2078105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2079105197Ssam mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2080120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2081120585Ssam __func__)); 2082105197Ssam return key_senderror(so, m, EINVAL); 2083105197Ssam } 2084105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2085105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2086105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2087120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2088120585Ssam __func__)); 2089105197Ssam return key_senderror(so, m, EINVAL); 2090105197Ssam } 2091105197Ssam 2092105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 2093105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 2094105197Ssam xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2095105197Ssam 2096194062Svanhu /* 2097194062Svanhu * Note: do not parse SADB_X_EXT_NAT_T_* here: 2098194062Svanhu * we are processing traffic endpoints. 2099194062Svanhu */ 2100194062Svanhu 2101105197Ssam /* make secindex */ 2102105197Ssam /* XXX boundary check against sa_len */ 2103105197Ssam KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir, 2104105197Ssam src0 + 1, 2105105197Ssam dst0 + 1, 2106105197Ssam src0->sadb_address_prefixlen, 2107105197Ssam dst0->sadb_address_prefixlen, 2108105197Ssam src0->sadb_address_proto, 2109105197Ssam &spidx); 2110105197Ssam 2111105197Ssam /* checking the direciton. */ 2112105197Ssam switch (xpl0->sadb_x_policy_dir) { 2113105197Ssam case IPSEC_DIR_INBOUND: 2114105197Ssam case IPSEC_DIR_OUTBOUND: 2115105197Ssam break; 2116105197Ssam default: 2117120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__)); 2118105197Ssam return key_senderror(so, m, EINVAL); 2119105197Ssam } 2120105197Ssam 2121105197Ssam /* Is there SP in SPD ? */ 2122105197Ssam if ((sp = key_getsp(&spidx)) == NULL) { 2123120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__)); 2124105197Ssam return key_senderror(so, m, EINVAL); 2125105197Ssam } 2126105197Ssam 2127105197Ssam /* save policy id to buffer to be returned. */ 2128105197Ssam xpl0->sadb_x_policy_id = sp->id; 2129105197Ssam 2130105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2131105197Ssam KEY_FREESP(&sp); 2132105197Ssam 2133105197Ssam { 2134105197Ssam struct mbuf *n; 2135105197Ssam struct sadb_msg *newmsg; 2136105197Ssam 2137194062Svanhu /* 2138194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 2139194062Svanhu * we are sending traffic endpoints. 2140194062Svanhu */ 2141194062Svanhu 2142105197Ssam /* create new sadb_msg to reply. */ 2143105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2144105197Ssam SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2145105197Ssam if (!n) 2146105197Ssam return key_senderror(so, m, ENOBUFS); 2147105197Ssam 2148105197Ssam newmsg = mtod(n, struct sadb_msg *); 2149105197Ssam newmsg->sadb_msg_errno = 0; 2150105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2151105197Ssam 2152105197Ssam m_freem(m); 2153105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2154105197Ssam } 2155105197Ssam} 2156105197Ssam 2157105197Ssam/* 2158105197Ssam * SADB_SPDDELETE2 processing 2159105197Ssam * receive 2160105197Ssam * <base, policy(*)> 2161105197Ssam * from the user(?), and set SADB_SASTATE_DEAD, 2162105197Ssam * and send, 2163105197Ssam * <base, policy(*)> 2164105197Ssam * to the ikmpd. 2165105197Ssam * policy(*) including direction of policy. 2166105197Ssam * 2167105197Ssam * m will always be freed. 2168105197Ssam */ 2169105197Ssamstatic int 2170105197Ssamkey_spddelete2(so, m, mhp) 2171105197Ssam struct socket *so; 2172105197Ssam struct mbuf *m; 2173105197Ssam const struct sadb_msghdr *mhp; 2174105197Ssam{ 2175105197Ssam u_int32_t id; 2176105197Ssam struct secpolicy *sp; 2177105197Ssam 2178120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2179120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2180120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2181120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2182105197Ssam 2183105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2184105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2185120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__)); 2186170803Sbz return key_senderror(so, m, EINVAL); 2187105197Ssam } 2188105197Ssam 2189105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2190105197Ssam 2191105197Ssam /* Is there SP in SPD ? */ 2192105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2193120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2194170803Sbz return key_senderror(so, m, EINVAL); 2195105197Ssam } 2196105197Ssam 2197105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2198105197Ssam KEY_FREESP(&sp); 2199105197Ssam 2200105197Ssam { 2201105197Ssam struct mbuf *n, *nn; 2202105197Ssam struct sadb_msg *newmsg; 2203105197Ssam int off, len; 2204105197Ssam 2205105197Ssam /* create new sadb_msg to reply. */ 2206105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2207105197Ssam 2208111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 2209105197Ssam if (n && len > MHLEN) { 2210111119Simp MCLGET(n, M_DONTWAIT); 2211105197Ssam if ((n->m_flags & M_EXT) == 0) { 2212105197Ssam m_freem(n); 2213105197Ssam n = NULL; 2214105197Ssam } 2215105197Ssam } 2216105197Ssam if (!n) 2217105197Ssam return key_senderror(so, m, ENOBUFS); 2218105197Ssam 2219105197Ssam n->m_len = len; 2220105197Ssam n->m_next = NULL; 2221105197Ssam off = 0; 2222105197Ssam 2223105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 2224105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2225105197Ssam 2226120585Ssam IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)", 2227120585Ssam off, len)); 2228105197Ssam 2229105197Ssam n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2230111119Simp mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2231105197Ssam if (!n->m_next) { 2232105197Ssam m_freem(n); 2233105197Ssam return key_senderror(so, m, ENOBUFS); 2234105197Ssam } 2235105197Ssam 2236105197Ssam n->m_pkthdr.len = 0; 2237105197Ssam for (nn = n; nn; nn = nn->m_next) 2238105197Ssam n->m_pkthdr.len += nn->m_len; 2239105197Ssam 2240105197Ssam newmsg = mtod(n, struct sadb_msg *); 2241105197Ssam newmsg->sadb_msg_errno = 0; 2242105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 2243105197Ssam 2244105197Ssam m_freem(m); 2245105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2246105197Ssam } 2247105197Ssam} 2248105197Ssam 2249105197Ssam/* 2250105197Ssam * SADB_X_GET processing 2251105197Ssam * receive 2252105197Ssam * <base, policy(*)> 2253105197Ssam * from the user(?), 2254105197Ssam * and send, 2255105197Ssam * <base, address(SD), policy> 2256105197Ssam * to the ikmpd. 2257105197Ssam * policy(*) including direction of policy. 2258105197Ssam * 2259105197Ssam * m will always be freed. 2260105197Ssam */ 2261105197Ssamstatic int 2262105197Ssamkey_spdget(so, m, mhp) 2263105197Ssam struct socket *so; 2264105197Ssam struct mbuf *m; 2265105197Ssam const struct sadb_msghdr *mhp; 2266105197Ssam{ 2267105197Ssam u_int32_t id; 2268105197Ssam struct secpolicy *sp; 2269105197Ssam struct mbuf *n; 2270105197Ssam 2271120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2272120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2273120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2274120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2275105197Ssam 2276105197Ssam if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2277105197Ssam mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2278120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2279120585Ssam __func__)); 2280105197Ssam return key_senderror(so, m, EINVAL); 2281105197Ssam } 2282105197Ssam 2283105197Ssam id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2284105197Ssam 2285105197Ssam /* Is there SP in SPD ? */ 2286105197Ssam if ((sp = key_getspbyid(id)) == NULL) { 2287120585Ssam ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id)); 2288105197Ssam return key_senderror(so, m, ENOENT); 2289105197Ssam } 2290105197Ssam 2291105197Ssam n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid); 2292105197Ssam if (n != NULL) { 2293105197Ssam m_freem(m); 2294105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2295105197Ssam } else 2296105197Ssam return key_senderror(so, m, ENOBUFS); 2297105197Ssam} 2298105197Ssam 2299105197Ssam/* 2300105197Ssam * SADB_X_SPDACQUIRE processing. 2301105197Ssam * Acquire policy and SA(s) for a *OUTBOUND* packet. 2302105197Ssam * send 2303105197Ssam * <base, policy(*)> 2304105197Ssam * to KMD, and expect to receive 2305105197Ssam * <base> with SADB_X_SPDACQUIRE if error occured, 2306105197Ssam * or 2307105197Ssam * <base, policy> 2308105197Ssam * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2309105197Ssam * policy(*) is without policy requests. 2310105197Ssam * 2311105197Ssam * 0 : succeed 2312105197Ssam * others: error number 2313105197Ssam */ 2314105197Ssamint 2315105197Ssamkey_spdacquire(sp) 2316105197Ssam struct secpolicy *sp; 2317105197Ssam{ 2318105197Ssam struct mbuf *result = NULL, *m; 2319105197Ssam struct secspacq *newspacq; 2320105197Ssam 2321120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2322120585Ssam IPSEC_ASSERT(sp->req == NULL, ("policy exists")); 2323120585Ssam IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 2324120585Ssam ("policy not IPSEC %u", sp->policy)); 2325105197Ssam 2326108533Sschweikh /* Get an entry to check whether sent message or not. */ 2327119643Ssam newspacq = key_getspacq(&sp->spidx); 2328119643Ssam if (newspacq != NULL) { 2329181803Sbz if (V_key_blockacq_count < newspacq->count) { 2330105197Ssam /* reset counter and do send message. */ 2331105197Ssam newspacq->count = 0; 2332105197Ssam } else { 2333105197Ssam /* increment counter and do nothing. */ 2334105197Ssam newspacq->count++; 2335105197Ssam return 0; 2336105197Ssam } 2337120585Ssam SPACQ_UNLOCK(); 2338105197Ssam } else { 2339105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 2340119643Ssam newspacq = key_newspacq(&sp->spidx); 2341119643Ssam if (newspacq == NULL) 2342105197Ssam return ENOBUFS; 2343105197Ssam } 2344105197Ssam 2345105197Ssam /* create new sadb_msg to reply. */ 2346105197Ssam m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2347170805Sbz if (!m) 2348170805Sbz return ENOBUFS; 2349170805Sbz 2350105197Ssam result = m; 2351105197Ssam 2352105197Ssam result->m_pkthdr.len = 0; 2353105197Ssam for (m = result; m; m = m->m_next) 2354105197Ssam result->m_pkthdr.len += m->m_len; 2355105197Ssam 2356105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2357105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2358105197Ssam 2359105197Ssam return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2360105197Ssam} 2361105197Ssam 2362105197Ssam/* 2363105197Ssam * SADB_SPDFLUSH processing 2364105197Ssam * receive 2365105197Ssam * <base> 2366105197Ssam * from the user, and free all entries in secpctree. 2367105197Ssam * and send, 2368105197Ssam * <base> 2369105197Ssam * to the user. 2370105197Ssam * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2371105197Ssam * 2372105197Ssam * m will always be freed. 2373105197Ssam */ 2374105197Ssamstatic int 2375105197Ssamkey_spdflush(so, m, mhp) 2376105197Ssam struct socket *so; 2377105197Ssam struct mbuf *m; 2378105197Ssam const struct sadb_msghdr *mhp; 2379105197Ssam{ 2380105197Ssam struct sadb_msg *newmsg; 2381105197Ssam struct secpolicy *sp; 2382105197Ssam u_int dir; 2383105197Ssam 2384120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2385120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2386120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2387120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2388105197Ssam 2389105197Ssam if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2390105197Ssam return key_senderror(so, m, EINVAL); 2391105197Ssam 2392105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2393120585Ssam SPTREE_LOCK(); 2394181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) 2395105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 2396120585Ssam SPTREE_UNLOCK(); 2397105197Ssam } 2398105197Ssam 2399105197Ssam if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2400120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2401105197Ssam return key_senderror(so, m, ENOBUFS); 2402105197Ssam } 2403105197Ssam 2404105197Ssam if (m->m_next) 2405105197Ssam m_freem(m->m_next); 2406105197Ssam m->m_next = NULL; 2407105197Ssam m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2408105197Ssam newmsg = mtod(m, struct sadb_msg *); 2409105197Ssam newmsg->sadb_msg_errno = 0; 2410105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2411105197Ssam 2412105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2413105197Ssam} 2414105197Ssam 2415105197Ssam/* 2416105197Ssam * SADB_SPDDUMP processing 2417105197Ssam * receive 2418105197Ssam * <base> 2419105197Ssam * from the user, and dump all SP leaves 2420105197Ssam * and send, 2421105197Ssam * <base> ..... 2422105197Ssam * to the ikmpd. 2423105197Ssam * 2424105197Ssam * m will always be freed. 2425105197Ssam */ 2426105197Ssamstatic int 2427105197Ssamkey_spddump(so, m, mhp) 2428105197Ssam struct socket *so; 2429105197Ssam struct mbuf *m; 2430105197Ssam const struct sadb_msghdr *mhp; 2431105197Ssam{ 2432105197Ssam struct secpolicy *sp; 2433105197Ssam int cnt; 2434105197Ssam u_int dir; 2435105197Ssam struct mbuf *n; 2436105197Ssam 2437120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 2438120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2439120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2440120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2441105197Ssam 2442105197Ssam /* search SPD entry and get buffer size. */ 2443105197Ssam cnt = 0; 2444192882Svanhu SPTREE_LOCK(); 2445105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2446181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2447105197Ssam cnt++; 2448105197Ssam } 2449105197Ssam } 2450105197Ssam 2451192882Svanhu if (cnt == 0) { 2452192882Svanhu SPTREE_UNLOCK(); 2453105197Ssam return key_senderror(so, m, ENOENT); 2454192882Svanhu } 2455105197Ssam 2456105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2457181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 2458105197Ssam --cnt; 2459105197Ssam n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, 2460105197Ssam mhp->msg->sadb_msg_pid); 2461105197Ssam 2462105197Ssam if (n) 2463105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2464105197Ssam } 2465105197Ssam } 2466105197Ssam 2467192882Svanhu SPTREE_UNLOCK(); 2468105197Ssam m_freem(m); 2469105197Ssam return 0; 2470105197Ssam} 2471105197Ssam 2472105197Ssamstatic struct mbuf * 2473189004Srdivackykey_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid) 2474105197Ssam{ 2475105197Ssam struct mbuf *result = NULL, *m; 2476181330Svanhu struct seclifetime lt; 2477105197Ssam 2478105197Ssam m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt); 2479105197Ssam if (!m) 2480105197Ssam goto fail; 2481105197Ssam result = m; 2482105197Ssam 2483194062Svanhu /* 2484194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 2485194062Svanhu * we are sending traffic endpoints. 2486194062Svanhu */ 2487105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2488105197Ssam &sp->spidx.src.sa, sp->spidx.prefs, 2489105197Ssam sp->spidx.ul_proto); 2490105197Ssam if (!m) 2491105197Ssam goto fail; 2492105197Ssam m_cat(result, m); 2493105197Ssam 2494105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2495105197Ssam &sp->spidx.dst.sa, sp->spidx.prefd, 2496105197Ssam sp->spidx.ul_proto); 2497105197Ssam if (!m) 2498105197Ssam goto fail; 2499105197Ssam m_cat(result, m); 2500105197Ssam 2501105197Ssam m = key_sp2msg(sp); 2502105197Ssam if (!m) 2503105197Ssam goto fail; 2504105197Ssam m_cat(result, m); 2505105197Ssam 2506181330Svanhu if(sp->lifetime){ 2507181330Svanhu lt.addtime=sp->created; 2508181330Svanhu lt.usetime= sp->lastused; 2509181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT); 2510181330Svanhu if (!m) 2511181330Svanhu goto fail; 2512181330Svanhu m_cat(result, m); 2513181330Svanhu 2514181330Svanhu lt.addtime=sp->lifetime; 2515181330Svanhu lt.usetime= sp->validtime; 2516181330Svanhu m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD); 2517181330Svanhu if (!m) 2518181330Svanhu goto fail; 2519181330Svanhu m_cat(result, m); 2520181330Svanhu } 2521181330Svanhu 2522105197Ssam if ((result->m_flags & M_PKTHDR) == 0) 2523105197Ssam goto fail; 2524105197Ssam 2525105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2526105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2527105197Ssam if (result == NULL) 2528105197Ssam goto fail; 2529105197Ssam } 2530105197Ssam 2531105197Ssam result->m_pkthdr.len = 0; 2532105197Ssam for (m = result; m; m = m->m_next) 2533105197Ssam result->m_pkthdr.len += m->m_len; 2534105197Ssam 2535105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2536105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2537105197Ssam 2538105197Ssam return result; 2539105197Ssam 2540105197Ssamfail: 2541105197Ssam m_freem(result); 2542105197Ssam return NULL; 2543105197Ssam} 2544105197Ssam 2545105197Ssam/* 2546105197Ssam * get PFKEY message length for security policy and request. 2547105197Ssam */ 2548105197Ssamstatic u_int 2549105197Ssamkey_getspreqmsglen(sp) 2550105197Ssam struct secpolicy *sp; 2551105197Ssam{ 2552105197Ssam u_int tlen; 2553105197Ssam 2554105197Ssam tlen = sizeof(struct sadb_x_policy); 2555105197Ssam 2556105197Ssam /* if is the policy for ipsec ? */ 2557105197Ssam if (sp->policy != IPSEC_POLICY_IPSEC) 2558105197Ssam return tlen; 2559105197Ssam 2560105197Ssam /* get length of ipsec requests */ 2561105197Ssam { 2562105197Ssam struct ipsecrequest *isr; 2563105197Ssam int len; 2564105197Ssam 2565105197Ssam for (isr = sp->req; isr != NULL; isr = isr->next) { 2566105197Ssam len = sizeof(struct sadb_x_ipsecrequest) 2567105197Ssam + isr->saidx.src.sa.sa_len 2568105197Ssam + isr->saidx.dst.sa.sa_len; 2569105197Ssam 2570105197Ssam tlen += PFKEY_ALIGN8(len); 2571105197Ssam } 2572105197Ssam } 2573105197Ssam 2574105197Ssam return tlen; 2575105197Ssam} 2576105197Ssam 2577105197Ssam/* 2578105197Ssam * SADB_SPDEXPIRE processing 2579105197Ssam * send 2580105197Ssam * <base, address(SD), lifetime(CH), policy> 2581105197Ssam * to KMD by PF_KEY. 2582105197Ssam * 2583105197Ssam * OUT: 0 : succeed 2584105197Ssam * others : error number 2585105197Ssam */ 2586105197Ssamstatic int 2587105197Ssamkey_spdexpire(sp) 2588105197Ssam struct secpolicy *sp; 2589105197Ssam{ 2590105197Ssam struct mbuf *result = NULL, *m; 2591105197Ssam int len; 2592105197Ssam int error = -1; 2593105197Ssam struct sadb_lifetime *lt; 2594105197Ssam 2595105197Ssam /* XXX: Why do we lock ? */ 2596105197Ssam 2597120585Ssam IPSEC_ASSERT(sp != NULL, ("null secpolicy")); 2598105197Ssam 2599105197Ssam /* set msg header */ 2600105197Ssam m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2601105197Ssam if (!m) { 2602105197Ssam error = ENOBUFS; 2603105197Ssam goto fail; 2604105197Ssam } 2605105197Ssam result = m; 2606105197Ssam 2607105197Ssam /* create lifetime extension (current and hard) */ 2608105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2609105197Ssam m = key_alloc_mbuf(len); 2610105197Ssam if (!m || m->m_next) { /*XXX*/ 2611105197Ssam if (m) 2612105197Ssam m_freem(m); 2613105197Ssam error = ENOBUFS; 2614105197Ssam goto fail; 2615105197Ssam } 2616105197Ssam bzero(mtod(m, caddr_t), len); 2617105197Ssam lt = mtod(m, struct sadb_lifetime *); 2618105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2619105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2620105197Ssam lt->sadb_lifetime_allocations = 0; 2621105197Ssam lt->sadb_lifetime_bytes = 0; 2622105197Ssam lt->sadb_lifetime_addtime = sp->created; 2623105197Ssam lt->sadb_lifetime_usetime = sp->lastused; 2624105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 2625105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2626105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2627105197Ssam lt->sadb_lifetime_allocations = 0; 2628105197Ssam lt->sadb_lifetime_bytes = 0; 2629105197Ssam lt->sadb_lifetime_addtime = sp->lifetime; 2630105197Ssam lt->sadb_lifetime_usetime = sp->validtime; 2631105197Ssam m_cat(result, m); 2632105197Ssam 2633194062Svanhu /* 2634194062Svanhu * Note: do not send SADB_X_EXT_NAT_T_* here: 2635194062Svanhu * we are sending traffic endpoints. 2636194062Svanhu */ 2637194062Svanhu 2638105197Ssam /* set sadb_address for source */ 2639105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2640105197Ssam &sp->spidx.src.sa, 2641105197Ssam sp->spidx.prefs, sp->spidx.ul_proto); 2642105197Ssam if (!m) { 2643105197Ssam error = ENOBUFS; 2644105197Ssam goto fail; 2645105197Ssam } 2646105197Ssam m_cat(result, m); 2647105197Ssam 2648105197Ssam /* set sadb_address for destination */ 2649105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2650105197Ssam &sp->spidx.dst.sa, 2651105197Ssam sp->spidx.prefd, sp->spidx.ul_proto); 2652105197Ssam if (!m) { 2653105197Ssam error = ENOBUFS; 2654105197Ssam goto fail; 2655105197Ssam } 2656105197Ssam m_cat(result, m); 2657105197Ssam 2658105197Ssam /* set secpolicy */ 2659105197Ssam m = key_sp2msg(sp); 2660105197Ssam if (!m) { 2661105197Ssam error = ENOBUFS; 2662105197Ssam goto fail; 2663105197Ssam } 2664105197Ssam m_cat(result, m); 2665105197Ssam 2666105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 2667105197Ssam error = EINVAL; 2668105197Ssam goto fail; 2669105197Ssam } 2670105197Ssam 2671105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 2672105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 2673105197Ssam if (result == NULL) { 2674105197Ssam error = ENOBUFS; 2675105197Ssam goto fail; 2676105197Ssam } 2677105197Ssam } 2678105197Ssam 2679105197Ssam result->m_pkthdr.len = 0; 2680105197Ssam for (m = result; m; m = m->m_next) 2681105197Ssam result->m_pkthdr.len += m->m_len; 2682105197Ssam 2683105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 2684105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 2685105197Ssam 2686105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2687105197Ssam 2688105197Ssam fail: 2689105197Ssam if (result) 2690105197Ssam m_freem(result); 2691105197Ssam return error; 2692105197Ssam} 2693105197Ssam 2694105197Ssam/* %%% SAD management */ 2695105197Ssam/* 2696105197Ssam * allocating a memory for new SA head, and copy from the values of mhp. 2697105197Ssam * OUT: NULL : failure due to the lack of memory. 2698105197Ssam * others : pointer to new SA head. 2699105197Ssam */ 2700105197Ssamstatic struct secashead * 2701105197Ssamkey_newsah(saidx) 2702105197Ssam struct secasindex *saidx; 2703105197Ssam{ 2704105197Ssam struct secashead *newsah; 2705105197Ssam 2706120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 2707105197Ssam 2708119643Ssam newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO); 2709105197Ssam if (newsah != NULL) { 2710105197Ssam int i; 2711105197Ssam for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++) 2712105197Ssam LIST_INIT(&newsah->savtree[i]); 2713105197Ssam newsah->saidx = *saidx; 2714105197Ssam 2715105197Ssam /* add to saidxtree */ 2716105197Ssam newsah->state = SADB_SASTATE_MATURE; 2717119643Ssam 2718120585Ssam SAHTREE_LOCK(); 2719181803Sbz LIST_INSERT_HEAD(&V_sahtree, newsah, chain); 2720120585Ssam SAHTREE_UNLOCK(); 2721105197Ssam } 2722105197Ssam return(newsah); 2723105197Ssam} 2724105197Ssam 2725105197Ssam/* 2726105197Ssam * delete SA index and all SA registerd. 2727105197Ssam */ 2728105197Ssamstatic void 2729105197Ssamkey_delsah(sah) 2730105197Ssam struct secashead *sah; 2731105197Ssam{ 2732105197Ssam struct secasvar *sav, *nextsav; 2733120585Ssam u_int stateidx; 2734105197Ssam int zombie = 0; 2735105197Ssam 2736120585Ssam IPSEC_ASSERT(sah != NULL, ("NULL sah")); 2737120585Ssam SAHTREE_LOCK_ASSERT(); 2738105197Ssam 2739105197Ssam /* searching all SA registerd in the secindex. */ 2740105197Ssam for (stateidx = 0; 2741185348Szec stateidx < _ARRAYLEN(saorder_state_any); 2742105197Ssam stateidx++) { 2743185348Szec u_int state = saorder_state_any[stateidx]; 2744120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) { 2745105197Ssam if (sav->refcnt == 0) { 2746105197Ssam /* sanity check */ 2747120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 2748190071Svanhu /* 2749190071Svanhu * do NOT call KEY_FREESAV here: 2750190071Svanhu * it will only delete the sav if refcnt == 1, 2751189962Svanhu * where we already know that refcnt == 0 2752189962Svanhu */ 2753189962Svanhu key_delsav(sav); 2754105197Ssam } else { 2755105197Ssam /* give up to delete this sa */ 2756105197Ssam zombie++; 2757105197Ssam } 2758105197Ssam } 2759105197Ssam } 2760120585Ssam if (!zombie) { /* delete only if there are savs */ 2761120585Ssam /* remove from tree of SA index */ 2762120585Ssam if (__LIST_CHAINED(sah)) 2763120585Ssam LIST_REMOVE(sah, chain); 2764120585Ssam if (sah->sa_route.ro_rt) { 2765120585Ssam RTFREE(sah->sa_route.ro_rt); 2766120585Ssam sah->sa_route.ro_rt = (struct rtentry *)NULL; 2767120585Ssam } 2768120585Ssam free(sah, M_IPSEC_SAH); 2769105197Ssam } 2770105197Ssam} 2771105197Ssam 2772105197Ssam/* 2773105197Ssam * allocating a new SA with LARVAL state. key_add() and key_getspi() call, 2774105197Ssam * and copy the values of mhp into new buffer. 2775105197Ssam * When SAD message type is GETSPI: 2776105197Ssam * to set sequence number from acq_seq++, 2777105197Ssam * to set zero to SPI. 2778105197Ssam * not to call key_setsava(). 2779105197Ssam * OUT: NULL : fail 2780105197Ssam * others : pointer to new secasvar. 2781105197Ssam * 2782105197Ssam * does not modify mbuf. does not free mbuf on error. 2783105197Ssam */ 2784105197Ssamstatic struct secasvar * 2785105197Ssamkey_newsav(m, mhp, sah, errp, where, tag) 2786105197Ssam struct mbuf *m; 2787105197Ssam const struct sadb_msghdr *mhp; 2788105197Ssam struct secashead *sah; 2789105197Ssam int *errp; 2790105197Ssam const char* where; 2791105197Ssam int tag; 2792105197Ssam{ 2793105197Ssam struct secasvar *newsav; 2794105197Ssam const struct sadb_sa *xsa; 2795105197Ssam 2796120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 2797120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 2798120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 2799120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 2800105197Ssam 2801119643Ssam newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO); 2802105197Ssam if (newsav == NULL) { 2803120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 2804105197Ssam *errp = ENOBUFS; 2805105197Ssam goto done; 2806105197Ssam } 2807105197Ssam 2808105197Ssam switch (mhp->msg->sadb_msg_type) { 2809105197Ssam case SADB_GETSPI: 2810105197Ssam newsav->spi = 0; 2811105197Ssam 2812105197Ssam#ifdef IPSEC_DOSEQCHECK 2813105197Ssam /* sync sequence number */ 2814105197Ssam if (mhp->msg->sadb_msg_seq == 0) 2815105197Ssam newsav->seq = 2816181803Sbz (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq)); 2817105197Ssam else 2818105197Ssam#endif 2819105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2820105197Ssam break; 2821105197Ssam 2822105197Ssam case SADB_ADD: 2823105197Ssam /* sanity check */ 2824105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 2825119643Ssam free(newsav, M_IPSEC_SA); 2826119643Ssam newsav = NULL; 2827120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 2828120585Ssam __func__)); 2829105197Ssam *errp = EINVAL; 2830105197Ssam goto done; 2831105197Ssam } 2832105197Ssam xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 2833105197Ssam newsav->spi = xsa->sadb_sa_spi; 2834105197Ssam newsav->seq = mhp->msg->sadb_msg_seq; 2835105197Ssam break; 2836105197Ssam default: 2837119643Ssam free(newsav, M_IPSEC_SA); 2838119643Ssam newsav = NULL; 2839105197Ssam *errp = EINVAL; 2840105197Ssam goto done; 2841105197Ssam } 2842105197Ssam 2843119643Ssam 2844105197Ssam /* copy sav values */ 2845105197Ssam if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 2846105197Ssam *errp = key_setsaval(newsav, m, mhp); 2847105197Ssam if (*errp) { 2848119643Ssam free(newsav, M_IPSEC_SA); 2849119643Ssam newsav = NULL; 2850105197Ssam goto done; 2851105197Ssam } 2852105197Ssam } 2853105197Ssam 2854120585Ssam SECASVAR_LOCK_INIT(newsav); 2855119643Ssam 2856105197Ssam /* reset created */ 2857105197Ssam newsav->created = time_second; 2858105197Ssam newsav->pid = mhp->msg->sadb_msg_pid; 2859105197Ssam 2860105197Ssam /* add to satree */ 2861105197Ssam newsav->sah = sah; 2862158767Spjd sa_initref(newsav); 2863105197Ssam newsav->state = SADB_SASTATE_LARVAL; 2864119643Ssam 2865119643Ssam /* XXX locking??? */ 2866105197Ssam LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav, 2867105197Ssam secasvar, chain); 2868105197Ssamdone: 2869105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 2870120585Ssam printf("DP %s from %s:%u return SP:%p\n", __func__, 2871105197Ssam where, tag, newsav)); 2872105197Ssam 2873105197Ssam return newsav; 2874105197Ssam} 2875105197Ssam 2876105197Ssam/* 2877105197Ssam * free() SA variable entry. 2878105197Ssam */ 2879105197Ssamstatic void 2880119643Ssamkey_cleansav(struct secasvar *sav) 2881105197Ssam{ 2882117051Ssam /* 2883117051Ssam * Cleanup xform state. Note that zeroize'ing causes the 2884117051Ssam * keys to be cleared; otherwise we must do it ourself. 2885117051Ssam */ 2886117051Ssam if (sav->tdb_xform != NULL) { 2887117051Ssam sav->tdb_xform->xf_zeroize(sav); 2888117051Ssam sav->tdb_xform = NULL; 2889117051Ssam } else { 2890120585Ssam KASSERT(sav->iv == NULL, ("iv but no xform")); 2891117051Ssam if (sav->key_auth != NULL) 2892157123Sgnn bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth)); 2893117051Ssam if (sav->key_enc != NULL) 2894157123Sgnn bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc)); 2895117051Ssam } 2896105197Ssam if (sav->key_auth != NULL) { 2897157123Sgnn if (sav->key_auth->key_data != NULL) 2898157123Sgnn free(sav->key_auth->key_data, M_IPSEC_MISC); 2899119643Ssam free(sav->key_auth, M_IPSEC_MISC); 2900105197Ssam sav->key_auth = NULL; 2901105197Ssam } 2902105197Ssam if (sav->key_enc != NULL) { 2903157123Sgnn if (sav->key_enc->key_data != NULL) 2904157123Sgnn free(sav->key_enc->key_data, M_IPSEC_MISC); 2905119643Ssam free(sav->key_enc, M_IPSEC_MISC); 2906105197Ssam sav->key_enc = NULL; 2907105197Ssam } 2908105197Ssam if (sav->sched) { 2909105197Ssam bzero(sav->sched, sav->schedlen); 2910119643Ssam free(sav->sched, M_IPSEC_MISC); 2911105197Ssam sav->sched = NULL; 2912105197Ssam } 2913105197Ssam if (sav->replay != NULL) { 2914119643Ssam free(sav->replay, M_IPSEC_MISC); 2915105197Ssam sav->replay = NULL; 2916105197Ssam } 2917105197Ssam if (sav->lft_c != NULL) { 2918119643Ssam free(sav->lft_c, M_IPSEC_MISC); 2919105197Ssam sav->lft_c = NULL; 2920105197Ssam } 2921105197Ssam if (sav->lft_h != NULL) { 2922119643Ssam free(sav->lft_h, M_IPSEC_MISC); 2923105197Ssam sav->lft_h = NULL; 2924105197Ssam } 2925105197Ssam if (sav->lft_s != NULL) { 2926119643Ssam free(sav->lft_s, M_IPSEC_MISC); 2927105197Ssam sav->lft_s = NULL; 2928105197Ssam } 2929119643Ssam} 2930105197Ssam 2931119643Ssam/* 2932119643Ssam * free() SA variable entry. 2933119643Ssam */ 2934119643Ssamstatic void 2935119643Ssamkey_delsav(sav) 2936119643Ssam struct secasvar *sav; 2937119643Ssam{ 2938120585Ssam IPSEC_ASSERT(sav != NULL, ("null sav")); 2939120585Ssam IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt)); 2940105197Ssam 2941119643Ssam /* remove from SA header */ 2942119643Ssam if (__LIST_CHAINED(sav)) 2943119643Ssam LIST_REMOVE(sav, chain); 2944119643Ssam key_cleansav(sav); 2945120585Ssam SECASVAR_LOCK_DESTROY(sav); 2946119643Ssam free(sav, M_IPSEC_SA); 2947105197Ssam} 2948105197Ssam 2949105197Ssam/* 2950105197Ssam * search SAD. 2951105197Ssam * OUT: 2952105197Ssam * NULL : not found 2953105197Ssam * others : found, pointer to a SA. 2954105197Ssam */ 2955105197Ssamstatic struct secashead * 2956105197Ssamkey_getsah(saidx) 2957105197Ssam struct secasindex *saidx; 2958105197Ssam{ 2959105197Ssam struct secashead *sah; 2960105197Ssam 2961120585Ssam SAHTREE_LOCK(); 2962181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2963105197Ssam if (sah->state == SADB_SASTATE_DEAD) 2964105197Ssam continue; 2965105197Ssam if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID)) 2966119643Ssam break; 2967105197Ssam } 2968120585Ssam SAHTREE_UNLOCK(); 2969105197Ssam 2970119643Ssam return sah; 2971105197Ssam} 2972105197Ssam 2973105197Ssam/* 2974105197Ssam * check not to be duplicated SPI. 2975105197Ssam * NOTE: this function is too slow due to searching all SAD. 2976105197Ssam * OUT: 2977105197Ssam * NULL : not found 2978105197Ssam * others : found, pointer to a SA. 2979105197Ssam */ 2980105197Ssamstatic struct secasvar * 2981105197Ssamkey_checkspidup(saidx, spi) 2982105197Ssam struct secasindex *saidx; 2983105197Ssam u_int32_t spi; 2984105197Ssam{ 2985105197Ssam struct secashead *sah; 2986105197Ssam struct secasvar *sav; 2987105197Ssam 2988105197Ssam /* check address family */ 2989105197Ssam if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 2990120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 2991120585Ssam __func__)); 2992105197Ssam return NULL; 2993105197Ssam } 2994105197Ssam 2995119643Ssam sav = NULL; 2996105197Ssam /* check all SAD */ 2997120585Ssam SAHTREE_LOCK(); 2998181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 2999105197Ssam if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3000105197Ssam continue; 3001105197Ssam sav = key_getsavbyspi(sah, spi); 3002105197Ssam if (sav != NULL) 3003119643Ssam break; 3004105197Ssam } 3005120585Ssam SAHTREE_UNLOCK(); 3006105197Ssam 3007119643Ssam return sav; 3008105197Ssam} 3009105197Ssam 3010105197Ssam/* 3011105197Ssam * search SAD litmited alive SA, protocol, SPI. 3012105197Ssam * OUT: 3013105197Ssam * NULL : not found 3014105197Ssam * others : found, pointer to a SA. 3015105197Ssam */ 3016105197Ssamstatic struct secasvar * 3017105197Ssamkey_getsavbyspi(sah, spi) 3018105197Ssam struct secashead *sah; 3019105197Ssam u_int32_t spi; 3020105197Ssam{ 3021105197Ssam struct secasvar *sav; 3022105197Ssam u_int stateidx, state; 3023105197Ssam 3024119643Ssam sav = NULL; 3025120585Ssam SAHTREE_LOCK_ASSERT(); 3026105197Ssam /* search all status */ 3027105197Ssam for (stateidx = 0; 3028185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 3029105197Ssam stateidx++) { 3030105197Ssam 3031185348Szec state = saorder_state_alive[stateidx]; 3032105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 3033105197Ssam 3034105197Ssam /* sanity check */ 3035105197Ssam if (sav->state != state) { 3036120585Ssam ipseclog((LOG_DEBUG, "%s: " 3037105197Ssam "invalid sav->state (queue: %d SA: %d)\n", 3038120585Ssam __func__, state, sav->state)); 3039105197Ssam continue; 3040105197Ssam } 3041105197Ssam 3042105197Ssam if (sav->spi == spi) 3043128859Ssam return sav; 3044105197Ssam } 3045105197Ssam } 3046105197Ssam 3047128859Ssam return NULL; 3048105197Ssam} 3049105197Ssam 3050105197Ssam/* 3051105197Ssam * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3052105197Ssam * You must update these if need. 3053105197Ssam * OUT: 0: success. 3054105197Ssam * !0: failure. 3055105197Ssam * 3056105197Ssam * does not modify mbuf. does not free mbuf on error. 3057105197Ssam */ 3058105197Ssamstatic int 3059105197Ssamkey_setsaval(sav, m, mhp) 3060105197Ssam struct secasvar *sav; 3061105197Ssam struct mbuf *m; 3062105197Ssam const struct sadb_msghdr *mhp; 3063105197Ssam{ 3064105197Ssam int error = 0; 3065105197Ssam 3066120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 3067120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 3068120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 3069105197Ssam 3070105197Ssam /* initialization */ 3071105197Ssam sav->replay = NULL; 3072105197Ssam sav->key_auth = NULL; 3073105197Ssam sav->key_enc = NULL; 3074105197Ssam sav->sched = NULL; 3075105197Ssam sav->schedlen = 0; 3076105197Ssam sav->iv = NULL; 3077105197Ssam sav->lft_c = NULL; 3078105197Ssam sav->lft_h = NULL; 3079105197Ssam sav->lft_s = NULL; 3080105197Ssam sav->tdb_xform = NULL; /* transform */ 3081105197Ssam sav->tdb_encalgxform = NULL; /* encoding algorithm */ 3082105197Ssam sav->tdb_authalgxform = NULL; /* authentication algorithm */ 3083105197Ssam sav->tdb_compalgxform = NULL; /* compression algorithm */ 3084194062Svanhu /* Initialize even if NAT-T not compiled in: */ 3085194062Svanhu sav->natt_type = 0; 3086194062Svanhu sav->natt_esp_frag_len = 0; 3087105197Ssam 3088105197Ssam /* SA */ 3089105197Ssam if (mhp->ext[SADB_EXT_SA] != NULL) { 3090105197Ssam const struct sadb_sa *sa0; 3091105197Ssam 3092105197Ssam sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3093105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3094105197Ssam error = EINVAL; 3095105197Ssam goto fail; 3096105197Ssam } 3097105197Ssam 3098105197Ssam sav->alg_auth = sa0->sadb_sa_auth; 3099105197Ssam sav->alg_enc = sa0->sadb_sa_encrypt; 3100105197Ssam sav->flags = sa0->sadb_sa_flags; 3101105197Ssam 3102105197Ssam /* replay window */ 3103105197Ssam if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3104105197Ssam sav->replay = (struct secreplay *) 3105119643Ssam malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO); 3106105197Ssam if (sav->replay == NULL) { 3107120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3108120585Ssam __func__)); 3109105197Ssam error = ENOBUFS; 3110105197Ssam goto fail; 3111105197Ssam } 3112105197Ssam if (sa0->sadb_sa_replay != 0) 3113105197Ssam sav->replay->bitmap = (caddr_t)(sav->replay+1); 3114105197Ssam sav->replay->wsize = sa0->sadb_sa_replay; 3115105197Ssam } 3116105197Ssam } 3117105197Ssam 3118105197Ssam /* Authentication keys */ 3119105197Ssam if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3120105197Ssam const struct sadb_key *key0; 3121105197Ssam int len; 3122105197Ssam 3123105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3124105197Ssam len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3125105197Ssam 3126105197Ssam error = 0; 3127105197Ssam if (len < sizeof(*key0)) { 3128105197Ssam error = EINVAL; 3129105197Ssam goto fail; 3130105197Ssam } 3131105197Ssam switch (mhp->msg->sadb_msg_satype) { 3132105197Ssam case SADB_SATYPE_AH: 3133105197Ssam case SADB_SATYPE_ESP: 3134125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3135105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3136105197Ssam sav->alg_auth != SADB_X_AALG_NULL) 3137105197Ssam error = EINVAL; 3138105197Ssam break; 3139105197Ssam case SADB_X_SATYPE_IPCOMP: 3140105197Ssam default: 3141105197Ssam error = EINVAL; 3142105197Ssam break; 3143105197Ssam } 3144105197Ssam if (error) { 3145120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n", 3146120585Ssam __func__)); 3147105197Ssam goto fail; 3148105197Ssam } 3149105197Ssam 3150157123Sgnn sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len, 3151157123Sgnn M_IPSEC_MISC); 3152157123Sgnn if (sav->key_auth == NULL ) { 3153157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3154157123Sgnn __func__)); 3155105197Ssam error = ENOBUFS; 3156105197Ssam goto fail; 3157105197Ssam } 3158105197Ssam } 3159105197Ssam 3160105197Ssam /* Encryption key */ 3161105197Ssam if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3162105197Ssam const struct sadb_key *key0; 3163105197Ssam int len; 3164105197Ssam 3165105197Ssam key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3166105197Ssam len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3167105197Ssam 3168105197Ssam error = 0; 3169105197Ssam if (len < sizeof(*key0)) { 3170105197Ssam error = EINVAL; 3171105197Ssam goto fail; 3172105197Ssam } 3173105197Ssam switch (mhp->msg->sadb_msg_satype) { 3174105197Ssam case SADB_SATYPE_ESP: 3175105197Ssam if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3176105197Ssam sav->alg_enc != SADB_EALG_NULL) { 3177105197Ssam error = EINVAL; 3178105197Ssam break; 3179105197Ssam } 3180157123Sgnn sav->key_enc = (struct seckey *)key_dup_keymsg(key0, 3181157123Sgnn len, 3182157123Sgnn M_IPSEC_MISC); 3183105197Ssam if (sav->key_enc == NULL) { 3184120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3185120585Ssam __func__)); 3186105197Ssam error = ENOBUFS; 3187105197Ssam goto fail; 3188105197Ssam } 3189105197Ssam break; 3190105197Ssam case SADB_X_SATYPE_IPCOMP: 3191105197Ssam if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3192105197Ssam error = EINVAL; 3193105197Ssam sav->key_enc = NULL; /*just in case*/ 3194105197Ssam break; 3195105197Ssam case SADB_SATYPE_AH: 3196125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3197105197Ssam default: 3198105197Ssam error = EINVAL; 3199105197Ssam break; 3200105197Ssam } 3201105197Ssam if (error) { 3202120585Ssam ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n", 3203120585Ssam __func__)); 3204105197Ssam goto fail; 3205105197Ssam } 3206105197Ssam } 3207105197Ssam 3208105197Ssam /* set iv */ 3209105197Ssam sav->ivlen = 0; 3210105197Ssam 3211105197Ssam switch (mhp->msg->sadb_msg_satype) { 3212105197Ssam case SADB_SATYPE_AH: 3213105197Ssam error = xform_init(sav, XF_AH); 3214105197Ssam break; 3215105197Ssam case SADB_SATYPE_ESP: 3216105197Ssam error = xform_init(sav, XF_ESP); 3217105197Ssam break; 3218105197Ssam case SADB_X_SATYPE_IPCOMP: 3219105197Ssam error = xform_init(sav, XF_IPCOMP); 3220105197Ssam break; 3221125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 3222125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3223125680Sbms break; 3224105197Ssam } 3225105197Ssam if (error) { 3226120585Ssam ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n", 3227120585Ssam __func__, mhp->msg->sadb_msg_satype)); 3228105197Ssam goto fail; 3229105197Ssam } 3230105197Ssam 3231105197Ssam /* reset created */ 3232105197Ssam sav->created = time_second; 3233105197Ssam 3234105197Ssam /* make lifetime for CURRENT */ 3235176743Sbz sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT); 3236105197Ssam if (sav->lft_c == NULL) { 3237120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3238105197Ssam error = ENOBUFS; 3239105197Ssam goto fail; 3240105197Ssam } 3241105197Ssam 3242157123Sgnn sav->lft_c->allocations = 0; 3243157123Sgnn sav->lft_c->bytes = 0; 3244157123Sgnn sav->lft_c->addtime = time_second; 3245157123Sgnn sav->lft_c->usetime = 0; 3246105197Ssam 3247105197Ssam /* lifetimes for HARD and SOFT */ 3248105197Ssam { 3249105197Ssam const struct sadb_lifetime *lft0; 3250105197Ssam 3251105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3252105197Ssam if (lft0 != NULL) { 3253105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3254105197Ssam error = EINVAL; 3255105197Ssam goto fail; 3256105197Ssam } 3257157123Sgnn sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3258105197Ssam if (sav->lft_h == NULL) { 3259120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3260105197Ssam error = ENOBUFS; 3261105197Ssam goto fail; 3262105197Ssam } 3263105197Ssam /* to be initialize ? */ 3264105197Ssam } 3265105197Ssam 3266105197Ssam lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3267105197Ssam if (lft0 != NULL) { 3268105197Ssam if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3269105197Ssam error = EINVAL; 3270105197Ssam goto fail; 3271105197Ssam } 3272157123Sgnn sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC); 3273105197Ssam if (sav->lft_s == NULL) { 3274120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 3275105197Ssam error = ENOBUFS; 3276105197Ssam goto fail; 3277105197Ssam } 3278105197Ssam /* to be initialize ? */ 3279105197Ssam } 3280105197Ssam } 3281105197Ssam 3282105197Ssam return 0; 3283105197Ssam 3284105197Ssam fail: 3285105197Ssam /* initialization */ 3286119643Ssam key_cleansav(sav); 3287105197Ssam 3288105197Ssam return error; 3289105197Ssam} 3290105197Ssam 3291105197Ssam/* 3292105197Ssam * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3293105197Ssam * OUT: 0: valid 3294105197Ssam * other: errno 3295105197Ssam */ 3296105197Ssamstatic int 3297119643Ssamkey_mature(struct secasvar *sav) 3298105197Ssam{ 3299105197Ssam int error; 3300105197Ssam 3301105197Ssam /* check SPI value */ 3302105197Ssam switch (sav->sah->saidx.proto) { 3303105197Ssam case IPPROTO_ESP: 3304105197Ssam case IPPROTO_AH: 3305170823Sbz /* 3306170823Sbz * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values 3307170823Sbz * 1-255 reserved by IANA for future use, 3308170823Sbz * 0 for implementation specific, local use. 3309170823Sbz */ 3310170823Sbz if (ntohl(sav->spi) <= 255) { 3311120585Ssam ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n", 3312120585Ssam __func__, (u_int32_t)ntohl(sav->spi))); 3313105197Ssam return EINVAL; 3314105197Ssam } 3315105197Ssam break; 3316105197Ssam } 3317105197Ssam 3318105197Ssam /* check satype */ 3319105197Ssam switch (sav->sah->saidx.proto) { 3320105197Ssam case IPPROTO_ESP: 3321105197Ssam /* check flags */ 3322105197Ssam if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3323105197Ssam (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3324120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3325120585Ssam "given to old-esp.\n", __func__)); 3326105197Ssam return EINVAL; 3327105197Ssam } 3328105197Ssam error = xform_init(sav, XF_ESP); 3329105197Ssam break; 3330105197Ssam case IPPROTO_AH: 3331105197Ssam /* check flags */ 3332105197Ssam if (sav->flags & SADB_X_EXT_DERIV) { 3333120585Ssam ipseclog((LOG_DEBUG, "%s: invalid flag (derived) " 3334120585Ssam "given to AH SA.\n", __func__)); 3335105197Ssam return EINVAL; 3336105197Ssam } 3337105197Ssam if (sav->alg_enc != SADB_EALG_NONE) { 3338120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3339120585Ssam "mismated.\n", __func__)); 3340105197Ssam return(EINVAL); 3341105197Ssam } 3342105197Ssam error = xform_init(sav, XF_AH); 3343105197Ssam break; 3344105197Ssam case IPPROTO_IPCOMP: 3345105197Ssam if (sav->alg_auth != SADB_AALG_NONE) { 3346120585Ssam ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3347120585Ssam "mismated.\n", __func__)); 3348105197Ssam return(EINVAL); 3349105197Ssam } 3350105197Ssam if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3351105197Ssam && ntohl(sav->spi) >= 0x10000) { 3352120585Ssam ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n", 3353120585Ssam __func__)); 3354105197Ssam return(EINVAL); 3355105197Ssam } 3356105197Ssam error = xform_init(sav, XF_IPCOMP); 3357105197Ssam break; 3358125680Sbms case IPPROTO_TCP: 3359125680Sbms if (sav->alg_enc != SADB_EALG_NONE) { 3360125680Sbms ipseclog((LOG_DEBUG, "%s: protocol and algorithm " 3361125680Sbms "mismated.\n", __func__)); 3362125680Sbms return(EINVAL); 3363125680Sbms } 3364125680Sbms error = xform_init(sav, XF_TCPSIGNATURE); 3365125680Sbms break; 3366105197Ssam default: 3367120585Ssam ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__)); 3368105197Ssam error = EPROTONOSUPPORT; 3369105197Ssam break; 3370105197Ssam } 3371119643Ssam if (error == 0) { 3372120585Ssam SAHTREE_LOCK(); 3373105197Ssam key_sa_chgstate(sav, SADB_SASTATE_MATURE); 3374120585Ssam SAHTREE_UNLOCK(); 3375119643Ssam } 3376105197Ssam return (error); 3377105197Ssam} 3378105197Ssam 3379105197Ssam/* 3380105197Ssam * subroutine for SADB_GET and SADB_DUMP. 3381105197Ssam */ 3382105197Ssamstatic struct mbuf * 3383189004Srdivackykey_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3384189004Srdivacky u_int32_t seq, u_int32_t pid) 3385105197Ssam{ 3386105197Ssam struct mbuf *result = NULL, *tres = NULL, *m; 3387105197Ssam int i; 3388105197Ssam int dumporder[] = { 3389105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 3390105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3391105197Ssam SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3392105197Ssam SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3393105197Ssam SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3394105197Ssam SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3395194062Svanhu#ifdef IPSEC_NAT_T 3396194062Svanhu SADB_X_EXT_NAT_T_TYPE, 3397194062Svanhu SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3398194062Svanhu SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3399194062Svanhu SADB_X_EXT_NAT_T_FRAG, 3400194062Svanhu#endif 3401105197Ssam }; 3402105197Ssam 3403105197Ssam m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3404105197Ssam if (m == NULL) 3405105197Ssam goto fail; 3406105197Ssam result = m; 3407105197Ssam 3408105197Ssam for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) { 3409105197Ssam m = NULL; 3410105197Ssam switch (dumporder[i]) { 3411105197Ssam case SADB_EXT_SA: 3412105197Ssam m = key_setsadbsa(sav); 3413105197Ssam if (!m) 3414105197Ssam goto fail; 3415105197Ssam break; 3416105197Ssam 3417105197Ssam case SADB_X_EXT_SA2: 3418105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 3419105197Ssam sav->replay ? sav->replay->count : 0, 3420105197Ssam sav->sah->saidx.reqid); 3421105197Ssam if (!m) 3422105197Ssam goto fail; 3423105197Ssam break; 3424105197Ssam 3425105197Ssam case SADB_EXT_ADDRESS_SRC: 3426105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3427105197Ssam &sav->sah->saidx.src.sa, 3428105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3429105197Ssam if (!m) 3430105197Ssam goto fail; 3431105197Ssam break; 3432105197Ssam 3433105197Ssam case SADB_EXT_ADDRESS_DST: 3434105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3435105197Ssam &sav->sah->saidx.dst.sa, 3436105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 3437105197Ssam if (!m) 3438105197Ssam goto fail; 3439105197Ssam break; 3440105197Ssam 3441105197Ssam case SADB_EXT_KEY_AUTH: 3442105197Ssam if (!sav->key_auth) 3443105197Ssam continue; 3444157123Sgnn m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH); 3445157123Sgnn if (!m) 3446157123Sgnn goto fail; 3447105197Ssam break; 3448105197Ssam 3449105197Ssam case SADB_EXT_KEY_ENCRYPT: 3450105197Ssam if (!sav->key_enc) 3451105197Ssam continue; 3452157123Sgnn m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT); 3453157123Sgnn if (!m) 3454157123Sgnn goto fail; 3455105197Ssam break; 3456105197Ssam 3457105197Ssam case SADB_EXT_LIFETIME_CURRENT: 3458105197Ssam if (!sav->lft_c) 3459105197Ssam continue; 3460157123Sgnn m = key_setlifetime(sav->lft_c, 3461157123Sgnn SADB_EXT_LIFETIME_CURRENT); 3462157123Sgnn if (!m) 3463157123Sgnn goto fail; 3464105197Ssam break; 3465105197Ssam 3466105197Ssam case SADB_EXT_LIFETIME_HARD: 3467105197Ssam if (!sav->lft_h) 3468105197Ssam continue; 3469157123Sgnn m = key_setlifetime(sav->lft_h, 3470157123Sgnn SADB_EXT_LIFETIME_HARD); 3471157123Sgnn if (!m) 3472157123Sgnn goto fail; 3473105197Ssam break; 3474105197Ssam 3475105197Ssam case SADB_EXT_LIFETIME_SOFT: 3476105197Ssam if (!sav->lft_s) 3477105197Ssam continue; 3478177554Sbz m = key_setlifetime(sav->lft_s, 3479157123Sgnn SADB_EXT_LIFETIME_SOFT); 3480157123Sgnn 3481157123Sgnn if (!m) 3482157123Sgnn goto fail; 3483105197Ssam break; 3484105197Ssam 3485194062Svanhu#ifdef IPSEC_NAT_T 3486194062Svanhu case SADB_X_EXT_NAT_T_TYPE: 3487194062Svanhu m = key_setsadbxtype(sav->natt_type); 3488194062Svanhu if (!m) 3489194062Svanhu goto fail; 3490194062Svanhu break; 3491194062Svanhu 3492194062Svanhu case SADB_X_EXT_NAT_T_DPORT: 3493194062Svanhu m = key_setsadbxport( 3494194062Svanhu KEY_PORTFROMSADDR(&sav->sah->saidx.dst), 3495194062Svanhu SADB_X_EXT_NAT_T_DPORT); 3496194062Svanhu if (!m) 3497194062Svanhu goto fail; 3498194062Svanhu break; 3499194062Svanhu 3500194062Svanhu case SADB_X_EXT_NAT_T_SPORT: 3501194062Svanhu m = key_setsadbxport( 3502194062Svanhu KEY_PORTFROMSADDR(&sav->sah->saidx.src), 3503194062Svanhu SADB_X_EXT_NAT_T_SPORT); 3504194062Svanhu if (!m) 3505194062Svanhu goto fail; 3506194062Svanhu break; 3507194062Svanhu 3508194062Svanhu case SADB_X_EXT_NAT_T_OAI: 3509194062Svanhu case SADB_X_EXT_NAT_T_OAR: 3510194062Svanhu case SADB_X_EXT_NAT_T_FRAG: 3511194062Svanhu /* We do not (yet) support those. */ 3512194062Svanhu continue; 3513194062Svanhu#endif 3514194062Svanhu 3515105197Ssam case SADB_EXT_ADDRESS_PROXY: 3516105197Ssam case SADB_EXT_IDENTITY_SRC: 3517105197Ssam case SADB_EXT_IDENTITY_DST: 3518105197Ssam /* XXX: should we brought from SPD ? */ 3519105197Ssam case SADB_EXT_SENSITIVITY: 3520105197Ssam default: 3521105197Ssam continue; 3522105197Ssam } 3523105197Ssam 3524157123Sgnn if (!m) 3525105197Ssam goto fail; 3526105197Ssam if (tres) 3527105197Ssam m_cat(m, tres); 3528105197Ssam tres = m; 3529157123Sgnn 3530105197Ssam } 3531105197Ssam 3532105197Ssam m_cat(result, tres); 3533105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 3534105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 3535105197Ssam if (result == NULL) 3536105197Ssam goto fail; 3537105197Ssam } 3538105197Ssam 3539105197Ssam result->m_pkthdr.len = 0; 3540105197Ssam for (m = result; m; m = m->m_next) 3541105197Ssam result->m_pkthdr.len += m->m_len; 3542105197Ssam 3543105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 3544105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 3545105197Ssam 3546105197Ssam return result; 3547105197Ssam 3548105197Ssamfail: 3549105197Ssam m_freem(result); 3550105197Ssam m_freem(tres); 3551105197Ssam return NULL; 3552105197Ssam} 3553105197Ssam 3554105197Ssam/* 3555105197Ssam * set data into sadb_msg. 3556105197Ssam */ 3557105197Ssamstatic struct mbuf * 3558189004Srdivackykey_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq, 3559189004Srdivacky pid_t pid, u_int16_t reserved) 3560105197Ssam{ 3561105197Ssam struct mbuf *m; 3562105197Ssam struct sadb_msg *p; 3563105197Ssam int len; 3564105197Ssam 3565105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3566105197Ssam if (len > MCLBYTES) 3567105197Ssam return NULL; 3568111119Simp MGETHDR(m, M_DONTWAIT, MT_DATA); 3569105197Ssam if (m && len > MHLEN) { 3570111119Simp MCLGET(m, M_DONTWAIT); 3571105197Ssam if ((m->m_flags & M_EXT) == 0) { 3572105197Ssam m_freem(m); 3573105197Ssam m = NULL; 3574105197Ssam } 3575105197Ssam } 3576105197Ssam if (!m) 3577105197Ssam return NULL; 3578105197Ssam m->m_pkthdr.len = m->m_len = len; 3579105197Ssam m->m_next = NULL; 3580105197Ssam 3581105197Ssam p = mtod(m, struct sadb_msg *); 3582105197Ssam 3583105197Ssam bzero(p, len); 3584105197Ssam p->sadb_msg_version = PF_KEY_V2; 3585105197Ssam p->sadb_msg_type = type; 3586105197Ssam p->sadb_msg_errno = 0; 3587105197Ssam p->sadb_msg_satype = satype; 3588105197Ssam p->sadb_msg_len = PFKEY_UNIT64(tlen); 3589105197Ssam p->sadb_msg_reserved = reserved; 3590105197Ssam p->sadb_msg_seq = seq; 3591105197Ssam p->sadb_msg_pid = (u_int32_t)pid; 3592105197Ssam 3593105197Ssam return m; 3594105197Ssam} 3595105197Ssam 3596105197Ssam/* 3597105197Ssam * copy secasvar data into sadb_address. 3598105197Ssam */ 3599105197Ssamstatic struct mbuf * 3600105197Ssamkey_setsadbsa(sav) 3601105197Ssam struct secasvar *sav; 3602105197Ssam{ 3603105197Ssam struct mbuf *m; 3604105197Ssam struct sadb_sa *p; 3605105197Ssam int len; 3606105197Ssam 3607105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3608105197Ssam m = key_alloc_mbuf(len); 3609105197Ssam if (!m || m->m_next) { /*XXX*/ 3610105197Ssam if (m) 3611105197Ssam m_freem(m); 3612105197Ssam return NULL; 3613105197Ssam } 3614105197Ssam 3615105197Ssam p = mtod(m, struct sadb_sa *); 3616105197Ssam 3617105197Ssam bzero(p, len); 3618105197Ssam p->sadb_sa_len = PFKEY_UNIT64(len); 3619105197Ssam p->sadb_sa_exttype = SADB_EXT_SA; 3620105197Ssam p->sadb_sa_spi = sav->spi; 3621105197Ssam p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3622105197Ssam p->sadb_sa_state = sav->state; 3623105197Ssam p->sadb_sa_auth = sav->alg_auth; 3624105197Ssam p->sadb_sa_encrypt = sav->alg_enc; 3625105197Ssam p->sadb_sa_flags = sav->flags; 3626105197Ssam 3627105197Ssam return m; 3628105197Ssam} 3629105197Ssam 3630105197Ssam/* 3631105197Ssam * set data into sadb_address. 3632105197Ssam */ 3633105197Ssamstatic struct mbuf * 3634189004Srdivackykey_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto) 3635105197Ssam{ 3636105197Ssam struct mbuf *m; 3637105197Ssam struct sadb_address *p; 3638105197Ssam size_t len; 3639105197Ssam 3640105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3641105197Ssam PFKEY_ALIGN8(saddr->sa_len); 3642105197Ssam m = key_alloc_mbuf(len); 3643105197Ssam if (!m || m->m_next) { /*XXX*/ 3644105197Ssam if (m) 3645105197Ssam m_freem(m); 3646105197Ssam return NULL; 3647105197Ssam } 3648105197Ssam 3649105197Ssam p = mtod(m, struct sadb_address *); 3650105197Ssam 3651105197Ssam bzero(p, len); 3652105197Ssam p->sadb_address_len = PFKEY_UNIT64(len); 3653105197Ssam p->sadb_address_exttype = exttype; 3654105197Ssam p->sadb_address_proto = ul_proto; 3655105197Ssam if (prefixlen == FULLMASK) { 3656105197Ssam switch (saddr->sa_family) { 3657105197Ssam case AF_INET: 3658105197Ssam prefixlen = sizeof(struct in_addr) << 3; 3659105197Ssam break; 3660105197Ssam case AF_INET6: 3661105197Ssam prefixlen = sizeof(struct in6_addr) << 3; 3662105197Ssam break; 3663105197Ssam default: 3664105197Ssam ; /*XXX*/ 3665105197Ssam } 3666105197Ssam } 3667105197Ssam p->sadb_address_prefixlen = prefixlen; 3668105197Ssam p->sadb_address_reserved = 0; 3669105197Ssam 3670105197Ssam bcopy(saddr, 3671105197Ssam mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3672105197Ssam saddr->sa_len); 3673105197Ssam 3674105197Ssam return m; 3675105197Ssam} 3676105197Ssam 3677105197Ssam/* 3678105197Ssam * set data into sadb_x_sa2. 3679105197Ssam */ 3680105197Ssamstatic struct mbuf * 3681189004Srdivackykey_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid) 3682105197Ssam{ 3683105197Ssam struct mbuf *m; 3684105197Ssam struct sadb_x_sa2 *p; 3685105197Ssam size_t len; 3686105197Ssam 3687105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 3688105197Ssam m = key_alloc_mbuf(len); 3689105197Ssam if (!m || m->m_next) { /*XXX*/ 3690105197Ssam if (m) 3691105197Ssam m_freem(m); 3692105197Ssam return NULL; 3693105197Ssam } 3694105197Ssam 3695105197Ssam p = mtod(m, struct sadb_x_sa2 *); 3696105197Ssam 3697105197Ssam bzero(p, len); 3698105197Ssam p->sadb_x_sa2_len = PFKEY_UNIT64(len); 3699105197Ssam p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 3700105197Ssam p->sadb_x_sa2_mode = mode; 3701105197Ssam p->sadb_x_sa2_reserved1 = 0; 3702105197Ssam p->sadb_x_sa2_reserved2 = 0; 3703105197Ssam p->sadb_x_sa2_sequence = seq; 3704105197Ssam p->sadb_x_sa2_reqid = reqid; 3705105197Ssam 3706105197Ssam return m; 3707105197Ssam} 3708105197Ssam 3709194062Svanhu#ifdef IPSEC_NAT_T 3710105197Ssam/* 3711194062Svanhu * Set a type in sadb_x_nat_t_type. 3712194062Svanhu */ 3713194062Svanhustatic struct mbuf * 3714194062Svanhukey_setsadbxtype(u_int16_t type) 3715194062Svanhu{ 3716194062Svanhu struct mbuf *m; 3717194062Svanhu size_t len; 3718194062Svanhu struct sadb_x_nat_t_type *p; 3719194062Svanhu 3720194062Svanhu len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3721194062Svanhu 3722194062Svanhu m = key_alloc_mbuf(len); 3723194062Svanhu if (!m || m->m_next) { /*XXX*/ 3724194062Svanhu if (m) 3725194062Svanhu m_freem(m); 3726194062Svanhu return (NULL); 3727194062Svanhu } 3728194062Svanhu 3729194062Svanhu p = mtod(m, struct sadb_x_nat_t_type *); 3730194062Svanhu 3731194062Svanhu bzero(p, len); 3732194062Svanhu p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3733194062Svanhu p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3734194062Svanhu p->sadb_x_nat_t_type_type = type; 3735194062Svanhu 3736194062Svanhu return (m); 3737194062Svanhu} 3738194062Svanhu/* 3739194062Svanhu * Set a port in sadb_x_nat_t_port. 3740194062Svanhu * In contrast to default RFC 2367 behaviour, port is in network byte order. 3741194062Svanhu */ 3742194062Svanhustatic struct mbuf * 3743194062Svanhukey_setsadbxport(u_int16_t port, u_int16_t type) 3744194062Svanhu{ 3745194062Svanhu struct mbuf *m; 3746194062Svanhu size_t len; 3747194062Svanhu struct sadb_x_nat_t_port *p; 3748194062Svanhu 3749194062Svanhu len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3750194062Svanhu 3751194062Svanhu m = key_alloc_mbuf(len); 3752194062Svanhu if (!m || m->m_next) { /*XXX*/ 3753194062Svanhu if (m) 3754194062Svanhu m_freem(m); 3755194062Svanhu return (NULL); 3756194062Svanhu } 3757194062Svanhu 3758194062Svanhu p = mtod(m, struct sadb_x_nat_t_port *); 3759194062Svanhu 3760194062Svanhu bzero(p, len); 3761194062Svanhu p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3762194062Svanhu p->sadb_x_nat_t_port_exttype = type; 3763194062Svanhu p->sadb_x_nat_t_port_port = port; 3764194062Svanhu 3765194062Svanhu return (m); 3766194062Svanhu} 3767194062Svanhu 3768194062Svanhu/* 3769194062Svanhu * Get port from sockaddr. Port is in network byte order. 3770194062Svanhu */ 3771194062Svanhuu_int16_t 3772194062Svanhukey_portfromsaddr(struct sockaddr *sa) 3773194062Svanhu{ 3774194062Svanhu 3775194062Svanhu switch (sa->sa_family) { 3776194062Svanhu#ifdef INET 3777194062Svanhu case AF_INET: 3778194062Svanhu return ((struct sockaddr_in *)sa)->sin_port; 3779194062Svanhu#endif 3780194062Svanhu#ifdef INET6 3781194062Svanhu case AF_INET6: 3782194062Svanhu return ((struct sockaddr_in6 *)sa)->sin6_port; 3783194062Svanhu#endif 3784194062Svanhu } 3785194062Svanhu KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 3786194062Svanhu printf("DP %s unexpected address family %d\n", 3787194062Svanhu __func__, sa->sa_family)); 3788194062Svanhu return (0); 3789194062Svanhu} 3790194062Svanhu#endif /* IPSEC_NAT_T */ 3791194062Svanhu 3792194062Svanhu/* 3793194062Svanhu * Set port in struct sockaddr. Port is in network byte order. 3794194062Svanhu */ 3795194062Svanhustatic void 3796194062Svanhukey_porttosaddr(struct sockaddr *sa, u_int16_t port) 3797194062Svanhu{ 3798194062Svanhu 3799194062Svanhu switch (sa->sa_family) { 3800194062Svanhu#ifdef INET 3801194062Svanhu case AF_INET: 3802194062Svanhu ((struct sockaddr_in *)sa)->sin_port = port; 3803194062Svanhu break; 3804194062Svanhu#endif 3805194062Svanhu#ifdef INET6 3806194062Svanhu case AF_INET6: 3807194062Svanhu ((struct sockaddr_in6 *)sa)->sin6_port = port; 3808194062Svanhu break; 3809194062Svanhu#endif 3810194062Svanhu default: 3811194062Svanhu ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n", 3812194062Svanhu __func__, sa->sa_family)); 3813194062Svanhu break; 3814194062Svanhu } 3815194062Svanhu} 3816194062Svanhu 3817194062Svanhu/* 3818105197Ssam * set data into sadb_x_policy 3819105197Ssam */ 3820105197Ssamstatic struct mbuf * 3821189004Srdivackykey_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 3822105197Ssam{ 3823105197Ssam struct mbuf *m; 3824105197Ssam struct sadb_x_policy *p; 3825105197Ssam size_t len; 3826105197Ssam 3827105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 3828105197Ssam m = key_alloc_mbuf(len); 3829105197Ssam if (!m || m->m_next) { /*XXX*/ 3830105197Ssam if (m) 3831105197Ssam m_freem(m); 3832105197Ssam return NULL; 3833105197Ssam } 3834105197Ssam 3835105197Ssam p = mtod(m, struct sadb_x_policy *); 3836105197Ssam 3837105197Ssam bzero(p, len); 3838105197Ssam p->sadb_x_policy_len = PFKEY_UNIT64(len); 3839105197Ssam p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 3840105197Ssam p->sadb_x_policy_type = type; 3841105197Ssam p->sadb_x_policy_dir = dir; 3842105197Ssam p->sadb_x_policy_id = id; 3843105197Ssam 3844105197Ssam return m; 3845105197Ssam} 3846105197Ssam 3847105197Ssam/* %%% utilities */ 3848157123Sgnn/* Take a key message (sadb_key) from the socket and turn it into one 3849157123Sgnn * of the kernel's key structures (seckey). 3850157123Sgnn * 3851157123Sgnn * IN: pointer to the src 3852157123Sgnn * OUT: NULL no more memory 3853105197Ssam */ 3854157123Sgnnstruct seckey * 3855157123Sgnnkey_dup_keymsg(const struct sadb_key *src, u_int len, 3856157123Sgnn struct malloc_type *type) 3857105197Ssam{ 3858157123Sgnn struct seckey *dst; 3859157123Sgnn dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT); 3860157123Sgnn if (dst != NULL) { 3861157123Sgnn dst->bits = src->sadb_key_bits; 3862157123Sgnn dst->key_data = (char *)malloc(len, type, M_NOWAIT); 3863157123Sgnn if (dst->key_data != NULL) { 3864157123Sgnn bcopy((const char *)src + sizeof(struct sadb_key), 3865157123Sgnn dst->key_data, len); 3866157123Sgnn } else { 3867157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3868157123Sgnn __func__)); 3869157123Sgnn free(dst, type); 3870157123Sgnn dst = NULL; 3871157123Sgnn } 3872157123Sgnn } else { 3873157123Sgnn ipseclog((LOG_DEBUG, "%s: No more memory.\n", 3874157123Sgnn __func__)); 3875105197Ssam 3876157123Sgnn } 3877157123Sgnn return dst; 3878157123Sgnn} 3879157123Sgnn 3880157123Sgnn/* Take a lifetime message (sadb_lifetime) passed in on a socket and 3881157123Sgnn * turn it into one of the kernel's lifetime structures (seclifetime). 3882157123Sgnn * 3883157123Sgnn * IN: pointer to the destination, source and malloc type 3884157123Sgnn * OUT: NULL, no more memory 3885157123Sgnn */ 3886157123Sgnn 3887157123Sgnnstatic struct seclifetime * 3888157123Sgnnkey_dup_lifemsg(const struct sadb_lifetime *src, 3889157123Sgnn struct malloc_type *type) 3890157123Sgnn{ 3891157123Sgnn struct seclifetime *dst = NULL; 3892157123Sgnn 3893157123Sgnn dst = (struct seclifetime *)malloc(sizeof(struct seclifetime), 3894157123Sgnn type, M_NOWAIT); 3895157123Sgnn if (dst == NULL) { 3896119643Ssam /* XXX counter */ 3897120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 3898157123Sgnn } else { 3899157123Sgnn dst->allocations = src->sadb_lifetime_allocations; 3900157123Sgnn dst->bytes = src->sadb_lifetime_bytes; 3901157123Sgnn dst->addtime = src->sadb_lifetime_addtime; 3902157123Sgnn dst->usetime = src->sadb_lifetime_usetime; 3903157123Sgnn } 3904157123Sgnn return dst; 3905105197Ssam} 3906105197Ssam 3907105197Ssam/* compare my own address 3908105197Ssam * OUT: 1: true, i.e. my address. 3909105197Ssam * 0: false 3910105197Ssam */ 3911105197Ssamint 3912105197Ssamkey_ismyaddr(sa) 3913105197Ssam struct sockaddr *sa; 3914105197Ssam{ 3915105197Ssam#ifdef INET 3916105197Ssam struct sockaddr_in *sin; 3917105197Ssam struct in_ifaddr *ia; 3918105197Ssam#endif 3919105197Ssam 3920120585Ssam IPSEC_ASSERT(sa != NULL, ("null sockaddr")); 3921105197Ssam 3922105197Ssam switch (sa->sa_family) { 3923105197Ssam#ifdef INET 3924105197Ssam case AF_INET: 3925105197Ssam sin = (struct sockaddr_in *)sa; 3926194951Srwatson IN_IFADDR_RLOCK(); 3927181803Sbz for (ia = V_in_ifaddrhead.tqh_first; ia; 3928105197Ssam ia = ia->ia_link.tqe_next) 3929105197Ssam { 3930105197Ssam if (sin->sin_family == ia->ia_addr.sin_family && 3931105197Ssam sin->sin_len == ia->ia_addr.sin_len && 3932105197Ssam sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 3933105197Ssam { 3934194951Srwatson IN_IFADDR_RUNLOCK(); 3935105197Ssam return 1; 3936105197Ssam } 3937105197Ssam } 3938194951Srwatson IN_IFADDR_RUNLOCK(); 3939105197Ssam break; 3940105197Ssam#endif 3941105197Ssam#ifdef INET6 3942105197Ssam case AF_INET6: 3943105197Ssam return key_ismyaddr6((struct sockaddr_in6 *)sa); 3944105197Ssam#endif 3945105197Ssam } 3946105197Ssam 3947105197Ssam return 0; 3948105197Ssam} 3949105197Ssam 3950105197Ssam#ifdef INET6 3951105197Ssam/* 3952105197Ssam * compare my own address for IPv6. 3953105197Ssam * 1: ours 3954105197Ssam * 0: other 3955105197Ssam * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 3956105197Ssam */ 3957105197Ssam#include <netinet6/in6_var.h> 3958105197Ssam 3959105197Ssamstatic int 3960105197Ssamkey_ismyaddr6(sin6) 3961105197Ssam struct sockaddr_in6 *sin6; 3962105197Ssam{ 3963105197Ssam struct in6_ifaddr *ia; 3964191663Sbms#if 0 3965105197Ssam struct in6_multi *in6m; 3966191663Sbms#endif 3967105197Ssam 3968194971Srwatson IN6_IFADDR_RLOCK(); 3969194907Srwatson TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 3970105197Ssam if (key_sockaddrcmp((struct sockaddr *)&sin6, 3971194971Srwatson (struct sockaddr *)&ia->ia_addr, 0) == 0) { 3972194971Srwatson IN6_IFADDR_RUNLOCK(); 3973105197Ssam return 1; 3974194971Srwatson } 3975105197Ssam 3976191663Sbms#if 0 3977105197Ssam /* 3978105197Ssam * XXX Multicast 3979105197Ssam * XXX why do we care about multlicast here while we don't care 3980105197Ssam * about IPv4 multicast?? 3981105197Ssam * XXX scope 3982105197Ssam */ 3983105197Ssam in6m = NULL; 3984105197Ssam IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m); 3985194971Srwatson if (in6m) { 3986194971Srwatson IN6_IFADDR_RUNLOCK(); 3987105197Ssam return 1; 3988194971Srwatson } 3989191663Sbms#endif 3990105197Ssam } 3991194971Srwatson IN6_IFADDR_RUNLOCK(); 3992105197Ssam 3993105197Ssam /* loopback, just for safety */ 3994105197Ssam if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 3995105197Ssam return 1; 3996105197Ssam 3997105197Ssam return 0; 3998105197Ssam} 3999105197Ssam#endif /*INET6*/ 4000105197Ssam 4001105197Ssam/* 4002105197Ssam * compare two secasindex structure. 4003105197Ssam * flag can specify to compare 2 saidxes. 4004105197Ssam * compare two secasindex structure without both mode and reqid. 4005105197Ssam * don't compare port. 4006105197Ssam * IN: 4007105197Ssam * saidx0: source, it can be in SAD. 4008105197Ssam * saidx1: object. 4009105197Ssam * OUT: 4010105197Ssam * 1 : equal 4011105197Ssam * 0 : not equal 4012105197Ssam */ 4013105197Ssamstatic int 4014105197Ssamkey_cmpsaidx( 4015105197Ssam const struct secasindex *saidx0, 4016105197Ssam const struct secasindex *saidx1, 4017105197Ssam int flag) 4018105197Ssam{ 4019194062Svanhu int chkport = 0; 4020194062Svanhu 4021105197Ssam /* sanity */ 4022105197Ssam if (saidx0 == NULL && saidx1 == NULL) 4023105197Ssam return 1; 4024105197Ssam 4025105197Ssam if (saidx0 == NULL || saidx1 == NULL) 4026105197Ssam return 0; 4027105197Ssam 4028105197Ssam if (saidx0->proto != saidx1->proto) 4029105197Ssam return 0; 4030105197Ssam 4031105197Ssam if (flag == CMP_EXACTLY) { 4032105197Ssam if (saidx0->mode != saidx1->mode) 4033105197Ssam return 0; 4034105197Ssam if (saidx0->reqid != saidx1->reqid) 4035105197Ssam return 0; 4036105197Ssam if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4037105197Ssam bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4038105197Ssam return 0; 4039105197Ssam } else { 4040105197Ssam 4041105197Ssam /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4042105197Ssam if (flag == CMP_MODE_REQID 4043105197Ssam ||flag == CMP_REQID) { 4044105197Ssam /* 4045105197Ssam * If reqid of SPD is non-zero, unique SA is required. 4046105197Ssam * The result must be of same reqid in this case. 4047105197Ssam */ 4048105197Ssam if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4049105197Ssam return 0; 4050105197Ssam } 4051105197Ssam 4052105197Ssam if (flag == CMP_MODE_REQID) { 4053105197Ssam if (saidx0->mode != IPSEC_MODE_ANY 4054105197Ssam && saidx0->mode != saidx1->mode) 4055105197Ssam return 0; 4056105197Ssam } 4057105197Ssam 4058194062Svanhu#ifdef IPSEC_NAT_T 4059194062Svanhu /* 4060194062Svanhu * If NAT-T is enabled, check ports for tunnel mode. 4061194062Svanhu * Do not check ports if they are set to zero in the SPD. 4062194062Svanhu * Also do not do it for transport mode, as there is no 4063194062Svanhu * port information available in the SP. 4064194062Svanhu */ 4065194062Svanhu if (saidx1->mode == IPSEC_MODE_TUNNEL && 4066194062Svanhu saidx1->src.sa.sa_family == AF_INET && 4067194062Svanhu saidx1->dst.sa.sa_family == AF_INET && 4068194062Svanhu ((const struct sockaddr_in *)(&saidx1->src))->sin_port && 4069194062Svanhu ((const struct sockaddr_in *)(&saidx1->dst))->sin_port) 4070194062Svanhu chkport = 1; 4071194062Svanhu#endif /* IPSEC_NAT_T */ 4072194062Svanhu 4073194062Svanhu if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) { 4074105197Ssam return 0; 4075105197Ssam } 4076194062Svanhu if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) { 4077105197Ssam return 0; 4078105197Ssam } 4079105197Ssam } 4080105197Ssam 4081105197Ssam return 1; 4082105197Ssam} 4083105197Ssam 4084105197Ssam/* 4085105197Ssam * compare two secindex structure exactly. 4086105197Ssam * IN: 4087105197Ssam * spidx0: source, it is often in SPD. 4088105197Ssam * spidx1: object, it is often from PFKEY message. 4089105197Ssam * OUT: 4090105197Ssam * 1 : equal 4091105197Ssam * 0 : not equal 4092105197Ssam */ 4093105197Ssamstatic int 4094105197Ssamkey_cmpspidx_exactly( 4095105197Ssam struct secpolicyindex *spidx0, 4096105197Ssam struct secpolicyindex *spidx1) 4097105197Ssam{ 4098105197Ssam /* sanity */ 4099105197Ssam if (spidx0 == NULL && spidx1 == NULL) 4100105197Ssam return 1; 4101105197Ssam 4102105197Ssam if (spidx0 == NULL || spidx1 == NULL) 4103105197Ssam return 0; 4104105197Ssam 4105105197Ssam if (spidx0->prefs != spidx1->prefs 4106105197Ssam || spidx0->prefd != spidx1->prefd 4107105197Ssam || spidx0->ul_proto != spidx1->ul_proto) 4108105197Ssam return 0; 4109105197Ssam 4110105197Ssam return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 && 4111105197Ssam key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0; 4112105197Ssam} 4113105197Ssam 4114105197Ssam/* 4115105197Ssam * compare two secindex structure with mask. 4116105197Ssam * IN: 4117105197Ssam * spidx0: source, it is often in SPD. 4118105197Ssam * spidx1: object, it is often from IP header. 4119105197Ssam * OUT: 4120105197Ssam * 1 : equal 4121105197Ssam * 0 : not equal 4122105197Ssam */ 4123105197Ssamstatic int 4124105197Ssamkey_cmpspidx_withmask( 4125105197Ssam struct secpolicyindex *spidx0, 4126105197Ssam struct secpolicyindex *spidx1) 4127105197Ssam{ 4128105197Ssam /* sanity */ 4129105197Ssam if (spidx0 == NULL && spidx1 == NULL) 4130105197Ssam return 1; 4131105197Ssam 4132105197Ssam if (spidx0 == NULL || spidx1 == NULL) 4133105197Ssam return 0; 4134105197Ssam 4135105197Ssam if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4136105197Ssam spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4137105197Ssam spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4138105197Ssam spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4139105197Ssam return 0; 4140105197Ssam 4141105197Ssam /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4142105197Ssam if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY 4143105197Ssam && spidx0->ul_proto != spidx1->ul_proto) 4144105197Ssam return 0; 4145105197Ssam 4146105197Ssam switch (spidx0->src.sa.sa_family) { 4147105197Ssam case AF_INET: 4148105197Ssam if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY 4149105197Ssam && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4150105197Ssam return 0; 4151105197Ssam if (!key_bbcmp(&spidx0->src.sin.sin_addr, 4152105197Ssam &spidx1->src.sin.sin_addr, spidx0->prefs)) 4153105197Ssam return 0; 4154105197Ssam break; 4155105197Ssam case AF_INET6: 4156105197Ssam if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY 4157105197Ssam && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4158105197Ssam return 0; 4159105197Ssam /* 4160105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 4161105197Ssam * as a wildcard scope, which matches any scope zone ID. 4162105197Ssam */ 4163105197Ssam if (spidx0->src.sin6.sin6_scope_id && 4164105197Ssam spidx1->src.sin6.sin6_scope_id && 4165105197Ssam spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4166105197Ssam return 0; 4167105197Ssam if (!key_bbcmp(&spidx0->src.sin6.sin6_addr, 4168105197Ssam &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4169105197Ssam return 0; 4170105197Ssam break; 4171105197Ssam default: 4172105197Ssam /* XXX */ 4173105197Ssam if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4174105197Ssam return 0; 4175105197Ssam break; 4176105197Ssam } 4177105197Ssam 4178105197Ssam switch (spidx0->dst.sa.sa_family) { 4179105197Ssam case AF_INET: 4180105197Ssam if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY 4181105197Ssam && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4182105197Ssam return 0; 4183105197Ssam if (!key_bbcmp(&spidx0->dst.sin.sin_addr, 4184105197Ssam &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4185105197Ssam return 0; 4186105197Ssam break; 4187105197Ssam case AF_INET6: 4188105197Ssam if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY 4189105197Ssam && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4190105197Ssam return 0; 4191105197Ssam /* 4192105197Ssam * scope_id check. if sin6_scope_id is 0, we regard it 4193105197Ssam * as a wildcard scope, which matches any scope zone ID. 4194105197Ssam */ 4195130928Sbms if (spidx0->dst.sin6.sin6_scope_id && 4196130928Sbms spidx1->dst.sin6.sin6_scope_id && 4197105197Ssam spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4198105197Ssam return 0; 4199105197Ssam if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr, 4200105197Ssam &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4201105197Ssam return 0; 4202105197Ssam break; 4203105197Ssam default: 4204105197Ssam /* XXX */ 4205105197Ssam if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4206105197Ssam return 0; 4207105197Ssam break; 4208105197Ssam } 4209105197Ssam 4210105197Ssam /* XXX Do we check other field ? e.g. flowinfo */ 4211105197Ssam 4212105197Ssam return 1; 4213105197Ssam} 4214105197Ssam 4215105197Ssam/* returns 0 on match */ 4216105197Ssamstatic int 4217105197Ssamkey_sockaddrcmp( 4218105197Ssam const struct sockaddr *sa1, 4219105197Ssam const struct sockaddr *sa2, 4220105197Ssam int port) 4221105197Ssam{ 4222105197Ssam#ifdef satosin 4223105197Ssam#undef satosin 4224105197Ssam#endif 4225105197Ssam#define satosin(s) ((const struct sockaddr_in *)s) 4226105197Ssam#ifdef satosin6 4227105197Ssam#undef satosin6 4228105197Ssam#endif 4229105197Ssam#define satosin6(s) ((const struct sockaddr_in6 *)s) 4230105197Ssam if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) 4231105197Ssam return 1; 4232105197Ssam 4233105197Ssam switch (sa1->sa_family) { 4234105197Ssam case AF_INET: 4235105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in)) 4236105197Ssam return 1; 4237105197Ssam if (satosin(sa1)->sin_addr.s_addr != 4238105197Ssam satosin(sa2)->sin_addr.s_addr) { 4239105197Ssam return 1; 4240105197Ssam } 4241105197Ssam if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port) 4242105197Ssam return 1; 4243105197Ssam break; 4244105197Ssam case AF_INET6: 4245105197Ssam if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4246105197Ssam return 1; /*EINVAL*/ 4247105197Ssam if (satosin6(sa1)->sin6_scope_id != 4248105197Ssam satosin6(sa2)->sin6_scope_id) { 4249105197Ssam return 1; 4250105197Ssam } 4251105197Ssam if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr, 4252105197Ssam &satosin6(sa2)->sin6_addr)) { 4253105197Ssam return 1; 4254105197Ssam } 4255105197Ssam if (port && 4256105197Ssam satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) { 4257105197Ssam return 1; 4258105197Ssam } 4259170120Sbz break; 4260105197Ssam default: 4261105197Ssam if (bcmp(sa1, sa2, sa1->sa_len) != 0) 4262105197Ssam return 1; 4263105197Ssam break; 4264105197Ssam } 4265105197Ssam 4266105197Ssam return 0; 4267105197Ssam#undef satosin 4268105197Ssam#undef satosin6 4269105197Ssam} 4270105197Ssam 4271105197Ssam/* 4272105197Ssam * compare two buffers with mask. 4273105197Ssam * IN: 4274105197Ssam * addr1: source 4275105197Ssam * addr2: object 4276105197Ssam * bits: Number of bits to compare 4277105197Ssam * OUT: 4278105197Ssam * 1 : equal 4279105197Ssam * 0 : not equal 4280105197Ssam */ 4281105197Ssamstatic int 4282105197Ssamkey_bbcmp(const void *a1, const void *a2, u_int bits) 4283105197Ssam{ 4284105197Ssam const unsigned char *p1 = a1; 4285105197Ssam const unsigned char *p2 = a2; 4286105197Ssam 4287105197Ssam /* XXX: This could be considerably faster if we compare a word 4288105197Ssam * at a time, but it is complicated on LSB Endian machines */ 4289105197Ssam 4290105197Ssam /* Handle null pointers */ 4291105197Ssam if (p1 == NULL || p2 == NULL) 4292105197Ssam return (p1 == p2); 4293105197Ssam 4294105197Ssam while (bits >= 8) { 4295105197Ssam if (*p1++ != *p2++) 4296105197Ssam return 0; 4297105197Ssam bits -= 8; 4298105197Ssam } 4299105197Ssam 4300105197Ssam if (bits > 0) { 4301105197Ssam u_int8_t mask = ~((1<<(8-bits))-1); 4302105197Ssam if ((*p1 & mask) != (*p2 & mask)) 4303105197Ssam return 0; 4304105197Ssam } 4305105197Ssam return 1; /* Match! */ 4306105197Ssam} 4307105197Ssam 4308119643Ssamstatic void 4309119643Ssamkey_flush_spd(time_t now) 4310105197Ssam{ 4311120585Ssam static u_int16_t sptree_scangen = 0; 4312120585Ssam u_int16_t gen = sptree_scangen++; 4313120585Ssam struct secpolicy *sp; 4314105197Ssam u_int dir; 4315105197Ssam 4316105197Ssam /* SPD */ 4317105197Ssam for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4318120585Ssamrestart: 4319120585Ssam SPTREE_LOCK(); 4320181803Sbz LIST_FOREACH(sp, &V_sptree[dir], chain) { 4321120585Ssam if (sp->scangen == gen) /* previously handled */ 4322120585Ssam continue; 4323120585Ssam sp->scangen = gen; 4324192880Svanhu if (sp->state == IPSEC_SPSTATE_DEAD && 4325192880Svanhu sp->refcnt == 1) { 4326192880Svanhu /* 4327192880Svanhu * Ensure that we only decrease refcnt once, 4328192880Svanhu * when we're the last consumer. 4329192880Svanhu * Directly call SP_DELREF/key_delsp instead 4330192880Svanhu * of KEY_FREESP to avoid unlocking/relocking 4331192880Svanhu * SPTREE_LOCK before key_delsp: may refcnt 4332192880Svanhu * be increased again during that time ? 4333192880Svanhu * NB: also clean entries created by 4334192880Svanhu * key_spdflush 4335192880Svanhu */ 4336192880Svanhu SP_DELREF(sp); 4337192880Svanhu key_delsp(sp); 4338120585Ssam SPTREE_UNLOCK(); 4339120585Ssam goto restart; 4340105197Ssam } 4341105197Ssam if (sp->lifetime == 0 && sp->validtime == 0) 4342105197Ssam continue; 4343105197Ssam if ((sp->lifetime && now - sp->created > sp->lifetime) 4344105197Ssam || (sp->validtime && now - sp->lastused > sp->validtime)) { 4345105197Ssam sp->state = IPSEC_SPSTATE_DEAD; 4346120585Ssam SPTREE_UNLOCK(); 4347105197Ssam key_spdexpire(sp); 4348120585Ssam goto restart; 4349105197Ssam } 4350105197Ssam } 4351120585Ssam SPTREE_UNLOCK(); 4352105197Ssam } 4353119643Ssam} 4354105197Ssam 4355119643Ssamstatic void 4356119643Ssamkey_flush_sad(time_t now) 4357119643Ssam{ 4358105197Ssam struct secashead *sah, *nextsah; 4359105197Ssam struct secasvar *sav, *nextsav; 4360105197Ssam 4361119643Ssam /* SAD */ 4362120585Ssam SAHTREE_LOCK(); 4363181803Sbz LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) { 4364105197Ssam /* if sah has been dead, then delete it and process next sah. */ 4365105197Ssam if (sah->state == SADB_SASTATE_DEAD) { 4366105197Ssam key_delsah(sah); 4367105197Ssam continue; 4368105197Ssam } 4369105197Ssam 4370105197Ssam /* if LARVAL entry doesn't become MATURE, delete it. */ 4371120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) { 4372190071Svanhu /* Need to also check refcnt for a larval SA ??? */ 4373181803Sbz if (now - sav->created > V_key_larval_lifetime) 4374105197Ssam KEY_FREESAV(&sav); 4375105197Ssam } 4376105197Ssam 4377105197Ssam /* 4378105197Ssam * check MATURE entry to start to send expire message 4379105197Ssam * whether or not. 4380105197Ssam */ 4381120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) { 4382105197Ssam /* we don't need to check. */ 4383105197Ssam if (sav->lft_s == NULL) 4384105197Ssam continue; 4385105197Ssam 4386105197Ssam /* sanity check */ 4387105197Ssam if (sav->lft_c == NULL) { 4388120585Ssam ipseclog((LOG_DEBUG,"%s: there is no CURRENT " 4389120585Ssam "time, why?\n", __func__)); 4390105197Ssam continue; 4391105197Ssam } 4392105197Ssam 4393105197Ssam /* check SOFT lifetime */ 4394157123Sgnn if (sav->lft_s->addtime != 0 && 4395157123Sgnn now - sav->created > sav->lft_s->addtime) { 4396189406Svanhu key_sa_chgstate(sav, SADB_SASTATE_DYING); 4397190075Svanhu /* 4398190323Svanhu * Actually, only send expire message if 4399190323Svanhu * SA has been used, as it was done before, 4400190323Svanhu * but should we always send such message, 4401190323Svanhu * and let IKE daemon decide if it should be 4402190323Svanhu * renegotiated or not ? 4403190323Svanhu * XXX expire message will actually NOT be 4404190323Svanhu * sent if SA is only used after soft 4405190323Svanhu * lifetime has been reached, see below 4406190323Svanhu * (DYING state) 4407105197Ssam */ 4408189406Svanhu if (sav->lft_c->usetime != 0) 4409105197Ssam key_expire(sav); 4410105197Ssam } 4411105197Ssam /* check SOFT lifetime by bytes */ 4412105197Ssam /* 4413105197Ssam * XXX I don't know the way to delete this SA 4414105197Ssam * when new SA is installed. Caution when it's 4415105197Ssam * installed too big lifetime by time. 4416105197Ssam */ 4417157123Sgnn else if (sav->lft_s->bytes != 0 && 4418157123Sgnn sav->lft_s->bytes < sav->lft_c->bytes) { 4419105197Ssam 4420105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DYING); 4421105197Ssam /* 4422105197Ssam * XXX If we keep to send expire 4423105197Ssam * message in the status of 4424105197Ssam * DYING. Do remove below code. 4425105197Ssam */ 4426105197Ssam key_expire(sav); 4427105197Ssam } 4428105197Ssam } 4429105197Ssam 4430105197Ssam /* check DYING entry to change status to DEAD. */ 4431120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) { 4432105197Ssam /* we don't need to check. */ 4433105197Ssam if (sav->lft_h == NULL) 4434105197Ssam continue; 4435105197Ssam 4436105197Ssam /* sanity check */ 4437105197Ssam if (sav->lft_c == NULL) { 4438120585Ssam ipseclog((LOG_DEBUG, "%s: there is no CURRENT " 4439120585Ssam "time, why?\n", __func__)); 4440105197Ssam continue; 4441105197Ssam } 4442105197Ssam 4443157123Sgnn if (sav->lft_h->addtime != 0 && 4444157123Sgnn now - sav->created > sav->lft_h->addtime) { 4445105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4446105197Ssam KEY_FREESAV(&sav); 4447105197Ssam } 4448105197Ssam#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4449105197Ssam else if (sav->lft_s != NULL 4450157123Sgnn && sav->lft_s->addtime != 0 4451157123Sgnn && now - sav->created > sav->lft_s->addtime) { 4452105197Ssam /* 4453105197Ssam * XXX: should be checked to be 4454105197Ssam * installed the valid SA. 4455105197Ssam */ 4456105197Ssam 4457105197Ssam /* 4458105197Ssam * If there is no SA then sending 4459105197Ssam * expire message. 4460105197Ssam */ 4461105197Ssam key_expire(sav); 4462105197Ssam } 4463105197Ssam#endif 4464105197Ssam /* check HARD lifetime by bytes */ 4465157123Sgnn else if (sav->lft_h->bytes != 0 && 4466157123Sgnn sav->lft_h->bytes < sav->lft_c->bytes) { 4467105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4468105197Ssam KEY_FREESAV(&sav); 4469105197Ssam } 4470105197Ssam } 4471105197Ssam 4472105197Ssam /* delete entry in DEAD */ 4473120585Ssam LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) { 4474105197Ssam /* sanity check */ 4475105197Ssam if (sav->state != SADB_SASTATE_DEAD) { 4476120585Ssam ipseclog((LOG_DEBUG, "%s: invalid sav->state " 4477120585Ssam "(queue: %d SA: %d): kill it anyway\n", 4478120585Ssam __func__, 4479105197Ssam SADB_SASTATE_DEAD, sav->state)); 4480105197Ssam } 4481105197Ssam /* 4482105197Ssam * do not call key_freesav() here. 4483105197Ssam * sav should already be freed, and sav->refcnt 4484105197Ssam * shows other references to sav 4485105197Ssam * (such as from SPD). 4486105197Ssam */ 4487105197Ssam } 4488105197Ssam } 4489120585Ssam SAHTREE_UNLOCK(); 4490119643Ssam} 4491105197Ssam 4492119643Ssamstatic void 4493119643Ssamkey_flush_acq(time_t now) 4494119643Ssam{ 4495105197Ssam struct secacq *acq, *nextacq; 4496105197Ssam 4497119643Ssam /* ACQ tree */ 4498120585Ssam ACQ_LOCK(); 4499181803Sbz for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) { 4500105197Ssam nextacq = LIST_NEXT(acq, chain); 4501181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4502105197Ssam && __LIST_CHAINED(acq)) { 4503105197Ssam LIST_REMOVE(acq, chain); 4504119643Ssam free(acq, M_IPSEC_SAQ); 4505105197Ssam } 4506105197Ssam } 4507120585Ssam ACQ_UNLOCK(); 4508119643Ssam} 4509105197Ssam 4510119643Ssamstatic void 4511119643Ssamkey_flush_spacq(time_t now) 4512119643Ssam{ 4513105197Ssam struct secspacq *acq, *nextacq; 4514105197Ssam 4515119643Ssam /* SP ACQ tree */ 4516120585Ssam SPACQ_LOCK(); 4517181803Sbz for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 4518105197Ssam nextacq = LIST_NEXT(acq, chain); 4519181803Sbz if (now - acq->created > V_key_blockacq_lifetime 4520105197Ssam && __LIST_CHAINED(acq)) { 4521105197Ssam LIST_REMOVE(acq, chain); 4522119643Ssam free(acq, M_IPSEC_SAQ); 4523105197Ssam } 4524105197Ssam } 4525120585Ssam SPACQ_UNLOCK(); 4526119643Ssam} 4527105197Ssam 4528119643Ssam/* 4529119643Ssam * time handler. 4530119643Ssam * scanning SPD and SAD to check status for each entries, 4531119643Ssam * and do to remove or to expire. 4532119643Ssam * XXX: year 2038 problem may remain. 4533119643Ssam */ 4534119643Ssamvoid 4535119643Ssamkey_timehandler(void) 4536119643Ssam{ 4537183550Szec VNET_ITERATOR_DECL(vnet_iter); 4538119643Ssam time_t now = time_second; 4539105197Ssam 4540185348Szec VNET_LIST_RLOCK(); 4541183550Szec VNET_FOREACH(vnet_iter) { 4542183550Szec CURVNET_SET(vnet_iter); 4543183550Szec key_flush_spd(now); 4544183550Szec key_flush_sad(now); 4545183550Szec key_flush_acq(now); 4546183550Szec key_flush_spacq(now); 4547183550Szec CURVNET_RESTORE(); 4548183550Szec } 4549185348Szec VNET_LIST_RUNLOCK(); 4550119643Ssam 4551105197Ssam#ifndef IPSEC_DEBUG2 4552105197Ssam /* do exchange to tick time !! */ 4553105197Ssam (void)timeout((void *)key_timehandler, (void *)0, hz); 4554105197Ssam#endif /* IPSEC_DEBUG2 */ 4555105197Ssam} 4556105197Ssam 4557105197Ssamu_long 4558105197Ssamkey_random() 4559105197Ssam{ 4560105197Ssam u_long value; 4561105197Ssam 4562105197Ssam key_randomfill(&value, sizeof(value)); 4563105197Ssam return value; 4564105197Ssam} 4565105197Ssam 4566105197Ssamvoid 4567105197Ssamkey_randomfill(p, l) 4568105197Ssam void *p; 4569105197Ssam size_t l; 4570105197Ssam{ 4571105197Ssam size_t n; 4572105197Ssam u_long v; 4573105197Ssam static int warn = 1; 4574105197Ssam 4575105197Ssam n = 0; 4576105197Ssam n = (size_t)read_random(p, (u_int)l); 4577105197Ssam /* last resort */ 4578105197Ssam while (n < l) { 4579105197Ssam v = random(); 4580105197Ssam bcopy(&v, (u_int8_t *)p + n, 4581105197Ssam l - n < sizeof(v) ? l - n : sizeof(v)); 4582105197Ssam n += sizeof(v); 4583105197Ssam 4584105197Ssam if (warn) { 4585105197Ssam printf("WARNING: pseudo-random number generator " 4586105197Ssam "used for IPsec processing\n"); 4587105197Ssam warn = 0; 4588105197Ssam } 4589105197Ssam } 4590105197Ssam} 4591105197Ssam 4592105197Ssam/* 4593105197Ssam * map SADB_SATYPE_* to IPPROTO_*. 4594105197Ssam * if satype == SADB_SATYPE then satype is mapped to ~0. 4595105197Ssam * OUT: 4596105197Ssam * 0: invalid satype. 4597105197Ssam */ 4598105197Ssamstatic u_int16_t 4599189004Srdivackykey_satype2proto(u_int8_t satype) 4600105197Ssam{ 4601105197Ssam switch (satype) { 4602105197Ssam case SADB_SATYPE_UNSPEC: 4603105197Ssam return IPSEC_PROTO_ANY; 4604105197Ssam case SADB_SATYPE_AH: 4605105197Ssam return IPPROTO_AH; 4606105197Ssam case SADB_SATYPE_ESP: 4607105197Ssam return IPPROTO_ESP; 4608105197Ssam case SADB_X_SATYPE_IPCOMP: 4609105197Ssam return IPPROTO_IPCOMP; 4610125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 4611125680Sbms return IPPROTO_TCP; 4612105197Ssam default: 4613105197Ssam return 0; 4614105197Ssam } 4615105197Ssam /* NOTREACHED */ 4616105197Ssam} 4617105197Ssam 4618105197Ssam/* 4619105197Ssam * map IPPROTO_* to SADB_SATYPE_* 4620105197Ssam * OUT: 4621105197Ssam * 0: invalid protocol type. 4622105197Ssam */ 4623105197Ssamstatic u_int8_t 4624189004Srdivackykey_proto2satype(u_int16_t proto) 4625105197Ssam{ 4626105197Ssam switch (proto) { 4627105197Ssam case IPPROTO_AH: 4628105197Ssam return SADB_SATYPE_AH; 4629105197Ssam case IPPROTO_ESP: 4630105197Ssam return SADB_SATYPE_ESP; 4631105197Ssam case IPPROTO_IPCOMP: 4632105197Ssam return SADB_X_SATYPE_IPCOMP; 4633125680Sbms case IPPROTO_TCP: 4634125680Sbms return SADB_X_SATYPE_TCPSIGNATURE; 4635105197Ssam default: 4636105197Ssam return 0; 4637105197Ssam } 4638105197Ssam /* NOTREACHED */ 4639105197Ssam} 4640105197Ssam 4641105197Ssam/* %%% PF_KEY */ 4642105197Ssam/* 4643105197Ssam * SADB_GETSPI processing is to receive 4644105197Ssam * <base, (SA2), src address, dst address, (SPI range)> 4645105197Ssam * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4646105197Ssam * tree with the status of LARVAL, and send 4647105197Ssam * <base, SA(*), address(SD)> 4648105197Ssam * to the IKMPd. 4649105197Ssam * 4650105197Ssam * IN: mhp: pointer to the pointer to each header. 4651105197Ssam * OUT: NULL if fail. 4652105197Ssam * other if success, return pointer to the message to send. 4653105197Ssam */ 4654105197Ssamstatic int 4655105197Ssamkey_getspi(so, m, mhp) 4656105197Ssam struct socket *so; 4657105197Ssam struct mbuf *m; 4658105197Ssam const struct sadb_msghdr *mhp; 4659105197Ssam{ 4660105197Ssam struct sadb_address *src0, *dst0; 4661105197Ssam struct secasindex saidx; 4662105197Ssam struct secashead *newsah; 4663105197Ssam struct secasvar *newsav; 4664105197Ssam u_int8_t proto; 4665105197Ssam u_int32_t spi; 4666105197Ssam u_int8_t mode; 4667105197Ssam u_int32_t reqid; 4668105197Ssam int error; 4669105197Ssam 4670120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4671120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4672120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4673120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4674105197Ssam 4675105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4676105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4677120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4678120585Ssam __func__)); 4679105197Ssam return key_senderror(so, m, EINVAL); 4680105197Ssam } 4681105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4682105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4683120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 4684120585Ssam __func__)); 4685105197Ssam return key_senderror(so, m, EINVAL); 4686105197Ssam } 4687105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4688105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4689105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4690105197Ssam } else { 4691105197Ssam mode = IPSEC_MODE_ANY; 4692105197Ssam reqid = 0; 4693105197Ssam } 4694105197Ssam 4695105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 4696105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 4697105197Ssam 4698105197Ssam /* map satype to proto */ 4699105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4700120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4701120585Ssam __func__)); 4702105197Ssam return key_senderror(so, m, EINVAL); 4703105197Ssam } 4704105197Ssam 4705194062Svanhu /* 4706194062Svanhu * Make sure the port numbers are zero. 4707194062Svanhu * In case of NAT-T we will update them later if needed. 4708194062Svanhu */ 4709105197Ssam switch (((struct sockaddr *)(src0 + 1))->sa_family) { 4710105197Ssam case AF_INET: 4711105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4712105197Ssam sizeof(struct sockaddr_in)) 4713105197Ssam return key_senderror(so, m, EINVAL); 4714105197Ssam ((struct sockaddr_in *)(src0 + 1))->sin_port = 0; 4715105197Ssam break; 4716105197Ssam case AF_INET6: 4717105197Ssam if (((struct sockaddr *)(src0 + 1))->sa_len != 4718105197Ssam sizeof(struct sockaddr_in6)) 4719105197Ssam return key_senderror(so, m, EINVAL); 4720105197Ssam ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0; 4721105197Ssam break; 4722105197Ssam default: 4723105197Ssam ; /*???*/ 4724105197Ssam } 4725105197Ssam switch (((struct sockaddr *)(dst0 + 1))->sa_family) { 4726105197Ssam case AF_INET: 4727105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4728105197Ssam sizeof(struct sockaddr_in)) 4729105197Ssam return key_senderror(so, m, EINVAL); 4730105197Ssam ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0; 4731105197Ssam break; 4732105197Ssam case AF_INET6: 4733105197Ssam if (((struct sockaddr *)(dst0 + 1))->sa_len != 4734105197Ssam sizeof(struct sockaddr_in6)) 4735105197Ssam return key_senderror(so, m, EINVAL); 4736105197Ssam ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0; 4737105197Ssam break; 4738105197Ssam default: 4739105197Ssam ; /*???*/ 4740105197Ssam } 4741105197Ssam 4742105197Ssam /* XXX boundary check against sa_len */ 4743105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 4744105197Ssam 4745194062Svanhu#ifdef IPSEC_NAT_T 4746194062Svanhu /* 4747194062Svanhu * Handle NAT-T info if present. 4748194062Svanhu * We made sure the port numbers are zero above, so we do 4749194062Svanhu * not have to worry in case we do not update them. 4750194062Svanhu */ 4751194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 4752194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAi present\n", __func__)); 4753194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 4754194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAr present\n", __func__)); 4755194062Svanhu 4756194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 4757194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 4758194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 4759194062Svanhu struct sadb_x_nat_t_type *type; 4760194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 4761194062Svanhu 4762194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 4763194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 4764194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 4765194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid nat-t message " 4766194062Svanhu "passed.\n", __func__)); 4767194062Svanhu return key_senderror(so, m, EINVAL); 4768194062Svanhu } 4769194062Svanhu 4770194062Svanhu sport = (struct sadb_x_nat_t_port *) 4771194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 4772194062Svanhu dport = (struct sadb_x_nat_t_port *) 4773194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 4774194062Svanhu 4775194062Svanhu if (sport) 4776194062Svanhu KEY_PORTTOSADDR(&saidx.src, sport->sadb_x_nat_t_port_port); 4777194062Svanhu if (dport) 4778194062Svanhu KEY_PORTTOSADDR(&saidx.dst, dport->sadb_x_nat_t_port_port); 4779194062Svanhu } 4780194062Svanhu#endif 4781194062Svanhu 4782105197Ssam /* SPI allocation */ 4783105197Ssam spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4784105197Ssam &saidx); 4785105197Ssam if (spi == 0) 4786105197Ssam return key_senderror(so, m, EINVAL); 4787105197Ssam 4788105197Ssam /* get a SA index */ 4789105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 4790105197Ssam /* create a new SA index */ 4791105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 4792120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 4793105197Ssam return key_senderror(so, m, ENOBUFS); 4794105197Ssam } 4795105197Ssam } 4796105197Ssam 4797105197Ssam /* get a new SA */ 4798105197Ssam /* XXX rewrite */ 4799105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 4800105197Ssam if (newsav == NULL) { 4801105197Ssam /* XXX don't free new SA index allocated in above. */ 4802105197Ssam return key_senderror(so, m, error); 4803105197Ssam } 4804105197Ssam 4805105197Ssam /* set spi */ 4806105197Ssam newsav->spi = htonl(spi); 4807105197Ssam 4808105197Ssam /* delete the entry in acqtree */ 4809105197Ssam if (mhp->msg->sadb_msg_seq != 0) { 4810105197Ssam struct secacq *acq; 4811105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) { 4812105197Ssam /* reset counter in order to deletion by timehandler. */ 4813105197Ssam acq->created = time_second; 4814105197Ssam acq->count = 0; 4815105197Ssam } 4816105197Ssam } 4817105197Ssam 4818105197Ssam { 4819105197Ssam struct mbuf *n, *nn; 4820105197Ssam struct sadb_sa *m_sa; 4821105197Ssam struct sadb_msg *newmsg; 4822105197Ssam int off, len; 4823105197Ssam 4824105197Ssam /* create new sadb_msg to reply. */ 4825105197Ssam len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 4826105197Ssam PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4827105197Ssam 4828111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 4829105197Ssam if (len > MHLEN) { 4830111119Simp MCLGET(n, M_DONTWAIT); 4831105197Ssam if ((n->m_flags & M_EXT) == 0) { 4832105197Ssam m_freem(n); 4833105197Ssam n = NULL; 4834105197Ssam } 4835105197Ssam } 4836105197Ssam if (!n) 4837105197Ssam return key_senderror(so, m, ENOBUFS); 4838105197Ssam 4839105197Ssam n->m_len = len; 4840105197Ssam n->m_next = NULL; 4841105197Ssam off = 0; 4842105197Ssam 4843105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 4844105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4845105197Ssam 4846105197Ssam m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off); 4847105197Ssam m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 4848105197Ssam m_sa->sadb_sa_exttype = SADB_EXT_SA; 4849105197Ssam m_sa->sadb_sa_spi = htonl(spi); 4850105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4851105197Ssam 4852120585Ssam IPSEC_ASSERT(off == len, 4853120585Ssam ("length inconsistency (off %u len %u)", off, len)); 4854105197Ssam 4855105197Ssam n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 4856105197Ssam SADB_EXT_ADDRESS_DST); 4857105197Ssam if (!n->m_next) { 4858105197Ssam m_freem(n); 4859105197Ssam return key_senderror(so, m, ENOBUFS); 4860105197Ssam } 4861105197Ssam 4862105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 4863105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 4864105197Ssam if (n == NULL) 4865105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 4866105197Ssam } 4867105197Ssam 4868105197Ssam n->m_pkthdr.len = 0; 4869105197Ssam for (nn = n; nn; nn = nn->m_next) 4870105197Ssam n->m_pkthdr.len += nn->m_len; 4871105197Ssam 4872105197Ssam newmsg = mtod(n, struct sadb_msg *); 4873105197Ssam newmsg->sadb_msg_seq = newsav->seq; 4874105197Ssam newmsg->sadb_msg_errno = 0; 4875105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 4876105197Ssam 4877105197Ssam m_freem(m); 4878105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 4879105197Ssam } 4880105197Ssam} 4881105197Ssam 4882105197Ssam/* 4883105197Ssam * allocating new SPI 4884105197Ssam * called by key_getspi(). 4885105197Ssam * OUT: 4886105197Ssam * 0: failure. 4887105197Ssam * others: success. 4888105197Ssam */ 4889105197Ssamstatic u_int32_t 4890105197Ssamkey_do_getnewspi(spirange, saidx) 4891105197Ssam struct sadb_spirange *spirange; 4892105197Ssam struct secasindex *saidx; 4893105197Ssam{ 4894105197Ssam u_int32_t newspi; 4895105197Ssam u_int32_t min, max; 4896181803Sbz int count = V_key_spi_trycnt; 4897105197Ssam 4898105197Ssam /* set spi range to allocate */ 4899105197Ssam if (spirange != NULL) { 4900105197Ssam min = spirange->sadb_spirange_min; 4901105197Ssam max = spirange->sadb_spirange_max; 4902105197Ssam } else { 4903181803Sbz min = V_key_spi_minval; 4904181803Sbz max = V_key_spi_maxval; 4905105197Ssam } 4906105197Ssam /* IPCOMP needs 2-byte SPI */ 4907105197Ssam if (saidx->proto == IPPROTO_IPCOMP) { 4908105197Ssam u_int32_t t; 4909105197Ssam if (min >= 0x10000) 4910105197Ssam min = 0xffff; 4911105197Ssam if (max >= 0x10000) 4912105197Ssam max = 0xffff; 4913105197Ssam if (min > max) { 4914105197Ssam t = min; min = max; max = t; 4915105197Ssam } 4916105197Ssam } 4917105197Ssam 4918105197Ssam if (min == max) { 4919105197Ssam if (key_checkspidup(saidx, min) != NULL) { 4920120585Ssam ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n", 4921120585Ssam __func__, min)); 4922105197Ssam return 0; 4923105197Ssam } 4924105197Ssam 4925105197Ssam count--; /* taking one cost. */ 4926105197Ssam newspi = min; 4927105197Ssam 4928105197Ssam } else { 4929105197Ssam 4930105197Ssam /* init SPI */ 4931105197Ssam newspi = 0; 4932105197Ssam 4933105197Ssam /* when requesting to allocate spi ranged */ 4934105197Ssam while (count--) { 4935105197Ssam /* generate pseudo-random SPI value ranged. */ 4936105197Ssam newspi = min + (key_random() % (max - min + 1)); 4937105197Ssam 4938105197Ssam if (key_checkspidup(saidx, newspi) == NULL) 4939105197Ssam break; 4940105197Ssam } 4941105197Ssam 4942105197Ssam if (count == 0 || newspi == 0) { 4943120585Ssam ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n", 4944120585Ssam __func__)); 4945105197Ssam return 0; 4946105197Ssam } 4947105197Ssam } 4948105197Ssam 4949105197Ssam /* statistics */ 4950105197Ssam keystat.getspi_count = 4951181803Sbz (keystat.getspi_count + V_key_spi_trycnt - count) / 2; 4952105197Ssam 4953105197Ssam return newspi; 4954105197Ssam} 4955105197Ssam 4956105197Ssam/* 4957105197Ssam * SADB_UPDATE processing 4958105197Ssam * receive 4959105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4960105197Ssam * key(AE), (identity(SD),) (sensitivity)> 4961105197Ssam * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 4962105197Ssam * and send 4963105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 4964105197Ssam * (identity(SD),) (sensitivity)> 4965105197Ssam * to the ikmpd. 4966105197Ssam * 4967105197Ssam * m will always be freed. 4968105197Ssam */ 4969105197Ssamstatic int 4970105197Ssamkey_update(so, m, mhp) 4971105197Ssam struct socket *so; 4972105197Ssam struct mbuf *m; 4973105197Ssam const struct sadb_msghdr *mhp; 4974105197Ssam{ 4975105197Ssam struct sadb_sa *sa0; 4976105197Ssam struct sadb_address *src0, *dst0; 4977194062Svanhu#ifdef IPSEC_NAT_T 4978194062Svanhu struct sadb_x_nat_t_type *type; 4979194513Sbz struct sadb_x_nat_t_port *sport, *dport; 4980194062Svanhu struct sadb_address *iaddr, *raddr; 4981194062Svanhu struct sadb_x_nat_t_frag *frag; 4982194062Svanhu#endif 4983105197Ssam struct secasindex saidx; 4984105197Ssam struct secashead *sah; 4985105197Ssam struct secasvar *sav; 4986105197Ssam u_int16_t proto; 4987105197Ssam u_int8_t mode; 4988105197Ssam u_int32_t reqid; 4989105197Ssam int error; 4990105197Ssam 4991120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 4992120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 4993120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 4994120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 4995105197Ssam 4996105197Ssam /* map satype to proto */ 4997105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 4998120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 4999120585Ssam __func__)); 5000105197Ssam return key_senderror(so, m, EINVAL); 5001105197Ssam } 5002105197Ssam 5003105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5004105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5005105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5006105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5007105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5008105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5009105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5010105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5011105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5012105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5013105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5014120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5015120585Ssam __func__)); 5016105197Ssam return key_senderror(so, m, EINVAL); 5017105197Ssam } 5018105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5019105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5020105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5021120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5022120585Ssam __func__)); 5023105197Ssam return key_senderror(so, m, EINVAL); 5024105197Ssam } 5025105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5026105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5027105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5028105197Ssam } else { 5029105197Ssam mode = IPSEC_MODE_ANY; 5030105197Ssam reqid = 0; 5031105197Ssam } 5032105197Ssam /* XXX boundary checking for other extensions */ 5033105197Ssam 5034105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5035105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5036105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5037105197Ssam 5038105197Ssam /* XXX boundary check against sa_len */ 5039105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5040105197Ssam 5041194062Svanhu /* 5042194062Svanhu * Make sure the port numbers are zero. 5043194062Svanhu * In case of NAT-T we will update them later if needed. 5044194062Svanhu */ 5045194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5046194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5047194062Svanhu 5048194062Svanhu#ifdef IPSEC_NAT_T 5049194062Svanhu /* 5050194062Svanhu * Handle NAT-T info if present. 5051194062Svanhu */ 5052194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5053194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5054194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5055194062Svanhu 5056194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5057194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5058194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5059194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5060194062Svanhu __func__)); 5061194062Svanhu return key_senderror(so, m, EINVAL); 5062194062Svanhu } 5063194062Svanhu 5064194062Svanhu type = (struct sadb_x_nat_t_type *) 5065194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5066194062Svanhu sport = (struct sadb_x_nat_t_port *) 5067194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5068194062Svanhu dport = (struct sadb_x_nat_t_port *) 5069194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5070194062Svanhu } else { 5071194062Svanhu type = 0; 5072194513Sbz sport = dport = 0; 5073194062Svanhu } 5074194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5075194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5076194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5077194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5078194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5079194062Svanhu __func__)); 5080194062Svanhu return key_senderror(so, m, EINVAL); 5081194062Svanhu } 5082194062Svanhu iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5083194062Svanhu raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5084194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5085194062Svanhu } else { 5086194062Svanhu iaddr = raddr = NULL; 5087194062Svanhu } 5088194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5089194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5090194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5091194062Svanhu __func__)); 5092194062Svanhu return key_senderror(so, m, EINVAL); 5093194062Svanhu } 5094194062Svanhu frag = (struct sadb_x_nat_t_frag *) 5095194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5096194062Svanhu } else { 5097194062Svanhu frag = 0; 5098194062Svanhu } 5099194062Svanhu#endif 5100194062Svanhu 5101105197Ssam /* get a SA header */ 5102105197Ssam if ((sah = key_getsah(&saidx)) == NULL) { 5103120585Ssam ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__)); 5104105197Ssam return key_senderror(so, m, ENOENT); 5105105197Ssam } 5106105197Ssam 5107105197Ssam /* set spidx if there */ 5108105197Ssam /* XXX rewrite */ 5109105197Ssam error = key_setident(sah, m, mhp); 5110105197Ssam if (error) 5111105197Ssam return key_senderror(so, m, error); 5112105197Ssam 5113105197Ssam /* find a SA with sequence number. */ 5114105197Ssam#ifdef IPSEC_DOSEQCHECK 5115105197Ssam if (mhp->msg->sadb_msg_seq != 0 5116105197Ssam && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) { 5117120585Ssam ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u " 5118120585Ssam "exists.\n", __func__, mhp->msg->sadb_msg_seq)); 5119105197Ssam return key_senderror(so, m, ENOENT); 5120105197Ssam } 5121105197Ssam#else 5122120585Ssam SAHTREE_LOCK(); 5123120585Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5124120585Ssam SAHTREE_UNLOCK(); 5125120585Ssam if (sav == NULL) { 5126120585Ssam ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n", 5127120585Ssam __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5128105197Ssam return key_senderror(so, m, EINVAL); 5129105197Ssam } 5130105197Ssam#endif 5131105197Ssam 5132105197Ssam /* validity check */ 5133105197Ssam if (sav->sah->saidx.proto != proto) { 5134120585Ssam ipseclog((LOG_DEBUG, "%s: protocol mismatched " 5135120585Ssam "(DB=%u param=%u)\n", __func__, 5136120585Ssam sav->sah->saidx.proto, proto)); 5137105197Ssam return key_senderror(so, m, EINVAL); 5138105197Ssam } 5139105197Ssam#ifdef IPSEC_DOSEQCHECK 5140105197Ssam if (sav->spi != sa0->sadb_sa_spi) { 5141120585Ssam ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n", 5142120585Ssam __func__, 5143105197Ssam (u_int32_t)ntohl(sav->spi), 5144105197Ssam (u_int32_t)ntohl(sa0->sadb_sa_spi))); 5145105197Ssam return key_senderror(so, m, EINVAL); 5146105197Ssam } 5147105197Ssam#endif 5148105197Ssam if (sav->pid != mhp->msg->sadb_msg_pid) { 5149120585Ssam ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n", 5150120585Ssam __func__, sav->pid, mhp->msg->sadb_msg_pid)); 5151105197Ssam return key_senderror(so, m, EINVAL); 5152105197Ssam } 5153105197Ssam 5154105197Ssam /* copy sav values */ 5155105197Ssam error = key_setsaval(sav, m, mhp); 5156105197Ssam if (error) { 5157105197Ssam KEY_FREESAV(&sav); 5158105197Ssam return key_senderror(so, m, error); 5159105197Ssam } 5160105197Ssam 5161105197Ssam /* check SA values to be mature. */ 5162105197Ssam if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) { 5163105197Ssam KEY_FREESAV(&sav); 5164105197Ssam return key_senderror(so, m, 0); 5165105197Ssam } 5166105197Ssam 5167194062Svanhu#ifdef IPSEC_NAT_T 5168194062Svanhu /* 5169194062Svanhu * Handle more NAT-T info if present, 5170194062Svanhu * now that we have a sav to fill. 5171194062Svanhu */ 5172194062Svanhu if (type) 5173194062Svanhu sav->natt_type = type->sadb_x_nat_t_type_type; 5174194062Svanhu 5175194513Sbz if (sport) 5176194513Sbz KEY_PORTTOSADDR(&sav->sah->saidx.src, 5177194513Sbz sport->sadb_x_nat_t_port_port); 5178194513Sbz if (dport) 5179194513Sbz KEY_PORTTOSADDR(&sav->sah->saidx.dst, 5180194513Sbz dport->sadb_x_nat_t_port_port); 5181194513Sbz 5182194062Svanhu#if 0 5183194062Svanhu /* 5184194062Svanhu * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5185194062Svanhu * We should actually check for a minimum MTU here, if we 5186194062Svanhu * want to support it in ip_output. 5187194062Svanhu */ 5188194062Svanhu if (frag) 5189194062Svanhu sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5190194062Svanhu#endif 5191194062Svanhu#endif 5192194062Svanhu 5193105197Ssam { 5194105197Ssam struct mbuf *n; 5195105197Ssam 5196105197Ssam /* set msg buf from mhp */ 5197105197Ssam n = key_getmsgbuf_x1(m, mhp); 5198105197Ssam if (n == NULL) { 5199120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5200105197Ssam return key_senderror(so, m, ENOBUFS); 5201105197Ssam } 5202105197Ssam 5203105197Ssam m_freem(m); 5204105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5205105197Ssam } 5206105197Ssam} 5207105197Ssam 5208105197Ssam/* 5209105197Ssam * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5210105197Ssam * only called by key_update(). 5211105197Ssam * OUT: 5212105197Ssam * NULL : not found 5213105197Ssam * others : found, pointer to a SA. 5214105197Ssam */ 5215105197Ssam#ifdef IPSEC_DOSEQCHECK 5216105197Ssamstatic struct secasvar * 5217105197Ssamkey_getsavbyseq(sah, seq) 5218105197Ssam struct secashead *sah; 5219105197Ssam u_int32_t seq; 5220105197Ssam{ 5221105197Ssam struct secasvar *sav; 5222105197Ssam u_int state; 5223105197Ssam 5224105197Ssam state = SADB_SASTATE_LARVAL; 5225105197Ssam 5226105197Ssam /* search SAD with sequence number ? */ 5227105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 5228105197Ssam 5229120585Ssam KEY_CHKSASTATE(state, sav->state, __func__); 5230105197Ssam 5231105197Ssam if (sav->seq == seq) { 5232158767Spjd sa_addref(sav); 5233105197Ssam KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 5234120585Ssam printf("DP %s cause refcnt++:%d SA:%p\n", 5235120585Ssam __func__, sav->refcnt, sav)); 5236105197Ssam return sav; 5237105197Ssam } 5238105197Ssam } 5239105197Ssam 5240105197Ssam return NULL; 5241105197Ssam} 5242105197Ssam#endif 5243105197Ssam 5244105197Ssam/* 5245105197Ssam * SADB_ADD processing 5246108533Sschweikh * add an entry to SA database, when received 5247105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5248105197Ssam * key(AE), (identity(SD),) (sensitivity)> 5249105197Ssam * from the ikmpd, 5250105197Ssam * and send 5251105197Ssam * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5252105197Ssam * (identity(SD),) (sensitivity)> 5253105197Ssam * to the ikmpd. 5254105197Ssam * 5255105197Ssam * IGNORE identity and sensitivity messages. 5256105197Ssam * 5257105197Ssam * m will always be freed. 5258105197Ssam */ 5259105197Ssamstatic int 5260105197Ssamkey_add(so, m, mhp) 5261105197Ssam struct socket *so; 5262105197Ssam struct mbuf *m; 5263105197Ssam const struct sadb_msghdr *mhp; 5264105197Ssam{ 5265105197Ssam struct sadb_sa *sa0; 5266105197Ssam struct sadb_address *src0, *dst0; 5267194062Svanhu#ifdef IPSEC_NAT_T 5268194062Svanhu struct sadb_x_nat_t_type *type; 5269194062Svanhu struct sadb_address *iaddr, *raddr; 5270194062Svanhu struct sadb_x_nat_t_frag *frag; 5271194062Svanhu#endif 5272105197Ssam struct secasindex saidx; 5273105197Ssam struct secashead *newsah; 5274105197Ssam struct secasvar *newsav; 5275105197Ssam u_int16_t proto; 5276105197Ssam u_int8_t mode; 5277105197Ssam u_int32_t reqid; 5278105197Ssam int error; 5279105197Ssam 5280120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5281120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5282120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5283120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5284105197Ssam 5285105197Ssam /* map satype to proto */ 5286105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5287120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5288120585Ssam __func__)); 5289105197Ssam return key_senderror(so, m, EINVAL); 5290105197Ssam } 5291105197Ssam 5292105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5293105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5294105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5295105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5296105197Ssam mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5297105197Ssam (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5298105197Ssam mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5299105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5300105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5301105197Ssam (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5302105197Ssam mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5303120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5304120585Ssam __func__)); 5305105197Ssam return key_senderror(so, m, EINVAL); 5306105197Ssam } 5307105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5308105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5309105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5310105197Ssam /* XXX need more */ 5311120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5312120585Ssam __func__)); 5313105197Ssam return key_senderror(so, m, EINVAL); 5314105197Ssam } 5315105197Ssam if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5316105197Ssam mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5317105197Ssam reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5318105197Ssam } else { 5319105197Ssam mode = IPSEC_MODE_ANY; 5320105197Ssam reqid = 0; 5321105197Ssam } 5322105197Ssam 5323105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5324105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5325105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5326105197Ssam 5327105197Ssam /* XXX boundary check against sa_len */ 5328105197Ssam KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx); 5329105197Ssam 5330194062Svanhu /* 5331194062Svanhu * Make sure the port numbers are zero. 5332194062Svanhu * In case of NAT-T we will update them later if needed. 5333194062Svanhu */ 5334194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5335194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5336194062Svanhu 5337194062Svanhu#ifdef IPSEC_NAT_T 5338194062Svanhu /* 5339194062Svanhu * Handle NAT-T info if present. 5340194062Svanhu */ 5341194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL && 5342194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5343194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5344194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5345194062Svanhu 5346194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) || 5347194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5348194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5349194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5350194062Svanhu __func__)); 5351194062Svanhu return key_senderror(so, m, EINVAL); 5352194062Svanhu } 5353194062Svanhu 5354194062Svanhu type = (struct sadb_x_nat_t_type *) 5355194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5356194062Svanhu sport = (struct sadb_x_nat_t_port *) 5357194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5358194062Svanhu dport = (struct sadb_x_nat_t_port *) 5359194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5360194062Svanhu 5361194062Svanhu if (sport) 5362194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5363194062Svanhu sport->sadb_x_nat_t_port_port); 5364194062Svanhu if (dport) 5365194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5366194062Svanhu dport->sadb_x_nat_t_port_port); 5367194062Svanhu } else { 5368194062Svanhu type = 0; 5369194062Svanhu } 5370194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL && 5371194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5372194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) || 5373194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5374194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5375194062Svanhu __func__)); 5376194062Svanhu return key_senderror(so, m, EINVAL); 5377194062Svanhu } 5378194062Svanhu iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5379194062Svanhu raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5380194062Svanhu ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__)); 5381194062Svanhu } else { 5382194062Svanhu iaddr = raddr = NULL; 5383194062Svanhu } 5384194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5385194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5386194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message\n", 5387194062Svanhu __func__)); 5388194062Svanhu return key_senderror(so, m, EINVAL); 5389194062Svanhu } 5390194062Svanhu frag = (struct sadb_x_nat_t_frag *) 5391194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5392194062Svanhu } else { 5393194062Svanhu frag = 0; 5394194062Svanhu } 5395194062Svanhu#endif 5396194062Svanhu 5397105197Ssam /* get a SA header */ 5398105197Ssam if ((newsah = key_getsah(&saidx)) == NULL) { 5399105197Ssam /* create a new SA header */ 5400105197Ssam if ((newsah = key_newsah(&saidx)) == NULL) { 5401120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__)); 5402105197Ssam return key_senderror(so, m, ENOBUFS); 5403105197Ssam } 5404105197Ssam } 5405105197Ssam 5406105197Ssam /* set spidx if there */ 5407105197Ssam /* XXX rewrite */ 5408105197Ssam error = key_setident(newsah, m, mhp); 5409105197Ssam if (error) { 5410105197Ssam return key_senderror(so, m, error); 5411105197Ssam } 5412105197Ssam 5413105197Ssam /* create new SA entry. */ 5414105197Ssam /* We can create new SA only if SPI is differenct. */ 5415120585Ssam SAHTREE_LOCK(); 5416120585Ssam newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi); 5417120585Ssam SAHTREE_UNLOCK(); 5418120585Ssam if (newsav != NULL) { 5419120585Ssam ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__)); 5420105197Ssam return key_senderror(so, m, EEXIST); 5421105197Ssam } 5422105197Ssam newsav = KEY_NEWSAV(m, mhp, newsah, &error); 5423105197Ssam if (newsav == NULL) { 5424105197Ssam return key_senderror(so, m, error); 5425105197Ssam } 5426105197Ssam 5427105197Ssam /* check SA values to be mature. */ 5428105197Ssam if ((error = key_mature(newsav)) != 0) { 5429105197Ssam KEY_FREESAV(&newsav); 5430105197Ssam return key_senderror(so, m, error); 5431105197Ssam } 5432105197Ssam 5433194062Svanhu#ifdef IPSEC_NAT_T 5434105197Ssam /* 5435194062Svanhu * Handle more NAT-T info if present, 5436194062Svanhu * now that we have a sav to fill. 5437194062Svanhu */ 5438194062Svanhu if (type) 5439194062Svanhu newsav->natt_type = type->sadb_x_nat_t_type_type; 5440194062Svanhu 5441194062Svanhu#if 0 5442194062Svanhu /* 5443194062Svanhu * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0. 5444194062Svanhu * We should actually check for a minimum MTU here, if we 5445194062Svanhu * want to support it in ip_output. 5446194062Svanhu */ 5447194062Svanhu if (frag) 5448194062Svanhu newsav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen; 5449194062Svanhu#endif 5450194062Svanhu#endif 5451194062Svanhu 5452194062Svanhu /* 5453105197Ssam * don't call key_freesav() here, as we would like to keep the SA 5454105197Ssam * in the database on success. 5455105197Ssam */ 5456105197Ssam 5457105197Ssam { 5458105197Ssam struct mbuf *n; 5459105197Ssam 5460105197Ssam /* set msg buf from mhp */ 5461105197Ssam n = key_getmsgbuf_x1(m, mhp); 5462105197Ssam if (n == NULL) { 5463120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5464105197Ssam return key_senderror(so, m, ENOBUFS); 5465105197Ssam } 5466105197Ssam 5467105197Ssam m_freem(m); 5468105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5469105197Ssam } 5470105197Ssam} 5471105197Ssam 5472105197Ssam/* m is retained */ 5473105197Ssamstatic int 5474105197Ssamkey_setident(sah, m, mhp) 5475105197Ssam struct secashead *sah; 5476105197Ssam struct mbuf *m; 5477105197Ssam const struct sadb_msghdr *mhp; 5478105197Ssam{ 5479105197Ssam const struct sadb_ident *idsrc, *iddst; 5480105197Ssam int idsrclen, iddstlen; 5481105197Ssam 5482120585Ssam IPSEC_ASSERT(sah != NULL, ("null secashead")); 5483120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5484120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5485120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5486105197Ssam 5487105197Ssam /* don't make buffer if not there */ 5488105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5489105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5490105197Ssam sah->idents = NULL; 5491105197Ssam sah->identd = NULL; 5492105197Ssam return 0; 5493105197Ssam } 5494105197Ssam 5495105197Ssam if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5496105197Ssam mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5497120585Ssam ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__)); 5498105197Ssam return EINVAL; 5499105197Ssam } 5500105197Ssam 5501105197Ssam idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5502105197Ssam iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5503105197Ssam idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5504105197Ssam iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5505105197Ssam 5506105197Ssam /* validity check */ 5507105197Ssam if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5508120585Ssam ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__)); 5509105197Ssam return EINVAL; 5510105197Ssam } 5511105197Ssam 5512105197Ssam switch (idsrc->sadb_ident_type) { 5513105197Ssam case SADB_IDENTTYPE_PREFIX: 5514105197Ssam case SADB_IDENTTYPE_FQDN: 5515105197Ssam case SADB_IDENTTYPE_USERFQDN: 5516105197Ssam default: 5517105197Ssam /* XXX do nothing */ 5518105197Ssam sah->idents = NULL; 5519105197Ssam sah->identd = NULL; 5520105197Ssam return 0; 5521105197Ssam } 5522105197Ssam 5523105197Ssam /* make structure */ 5524157123Sgnn sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5525105197Ssam if (sah->idents == NULL) { 5526120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5527105197Ssam return ENOBUFS; 5528105197Ssam } 5529157123Sgnn sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT); 5530105197Ssam if (sah->identd == NULL) { 5531119643Ssam free(sah->idents, M_IPSEC_MISC); 5532105197Ssam sah->idents = NULL; 5533120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 5534105197Ssam return ENOBUFS; 5535105197Ssam } 5536157123Sgnn sah->idents->type = idsrc->sadb_ident_type; 5537157123Sgnn sah->idents->id = idsrc->sadb_ident_id; 5538105197Ssam 5539157123Sgnn sah->identd->type = iddst->sadb_ident_type; 5540157123Sgnn sah->identd->id = iddst->sadb_ident_id; 5541157123Sgnn 5542105197Ssam return 0; 5543105197Ssam} 5544105197Ssam 5545105197Ssam/* 5546105197Ssam * m will not be freed on return. 5547105197Ssam * it is caller's responsibility to free the result. 5548105197Ssam */ 5549105197Ssamstatic struct mbuf * 5550105197Ssamkey_getmsgbuf_x1(m, mhp) 5551105197Ssam struct mbuf *m; 5552105197Ssam const struct sadb_msghdr *mhp; 5553105197Ssam{ 5554105197Ssam struct mbuf *n; 5555105197Ssam 5556120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5557120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5558120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5559105197Ssam 5560105197Ssam /* create new sadb_msg to reply. */ 5561105197Ssam n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED, 5562105197Ssam SADB_EXT_SA, SADB_X_EXT_SA2, 5563105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5564105197Ssam SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5565105197Ssam SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST); 5566105197Ssam if (!n) 5567105197Ssam return NULL; 5568105197Ssam 5569105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5570105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5571105197Ssam if (n == NULL) 5572105197Ssam return NULL; 5573105197Ssam } 5574105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5575105197Ssam mtod(n, struct sadb_msg *)->sadb_msg_len = 5576105197Ssam PFKEY_UNIT64(n->m_pkthdr.len); 5577105197Ssam 5578105197Ssam return n; 5579105197Ssam} 5580105197Ssam 5581105197Ssamstatic int key_delete_all __P((struct socket *, struct mbuf *, 5582105197Ssam const struct sadb_msghdr *, u_int16_t)); 5583105197Ssam 5584105197Ssam/* 5585105197Ssam * SADB_DELETE processing 5586105197Ssam * receive 5587105197Ssam * <base, SA(*), address(SD)> 5588105197Ssam * from the ikmpd, and set SADB_SASTATE_DEAD, 5589105197Ssam * and send, 5590105197Ssam * <base, SA(*), address(SD)> 5591105197Ssam * to the ikmpd. 5592105197Ssam * 5593105197Ssam * m will always be freed. 5594105197Ssam */ 5595105197Ssamstatic int 5596105197Ssamkey_delete(so, m, mhp) 5597105197Ssam struct socket *so; 5598105197Ssam struct mbuf *m; 5599105197Ssam const struct sadb_msghdr *mhp; 5600105197Ssam{ 5601105197Ssam struct sadb_sa *sa0; 5602105197Ssam struct sadb_address *src0, *dst0; 5603105197Ssam struct secasindex saidx; 5604105197Ssam struct secashead *sah; 5605105197Ssam struct secasvar *sav = NULL; 5606105197Ssam u_int16_t proto; 5607105197Ssam 5608120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5609120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5610120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5611120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5612105197Ssam 5613105197Ssam /* map satype to proto */ 5614105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5615120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5616120585Ssam __func__)); 5617105197Ssam return key_senderror(so, m, EINVAL); 5618105197Ssam } 5619105197Ssam 5620105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5621105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5622120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5623120585Ssam __func__)); 5624105197Ssam return key_senderror(so, m, EINVAL); 5625105197Ssam } 5626105197Ssam 5627105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5628105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5629120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5630120585Ssam __func__)); 5631105197Ssam return key_senderror(so, m, EINVAL); 5632105197Ssam } 5633105197Ssam 5634105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL) { 5635105197Ssam /* 5636105197Ssam * Caller wants us to delete all non-LARVAL SAs 5637105197Ssam * that match the src/dst. This is used during 5638105197Ssam * IKE INITIAL-CONTACT. 5639105197Ssam */ 5640120585Ssam ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__)); 5641105197Ssam return key_delete_all(so, m, mhp, proto); 5642105197Ssam } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5643120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5644120585Ssam __func__)); 5645105197Ssam return key_senderror(so, m, EINVAL); 5646105197Ssam } 5647105197Ssam 5648105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5649105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5650105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5651105197Ssam 5652105197Ssam /* XXX boundary check against sa_len */ 5653105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5654105197Ssam 5655194062Svanhu /* 5656194062Svanhu * Make sure the port numbers are zero. 5657194062Svanhu * In case of NAT-T we will update them later if needed. 5658194062Svanhu */ 5659194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5660194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5661194062Svanhu 5662194062Svanhu#ifdef IPSEC_NAT_T 5663194062Svanhu /* 5664194062Svanhu * Handle NAT-T info if present. 5665194062Svanhu */ 5666194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5667194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5668194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5669194062Svanhu 5670194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5671194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5672194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5673194062Svanhu __func__)); 5674194062Svanhu return key_senderror(so, m, EINVAL); 5675194062Svanhu } 5676194062Svanhu 5677194062Svanhu sport = (struct sadb_x_nat_t_port *) 5678194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5679194062Svanhu dport = (struct sadb_x_nat_t_port *) 5680194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5681194062Svanhu 5682194062Svanhu if (sport) 5683194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5684194062Svanhu sport->sadb_x_nat_t_port_port); 5685194062Svanhu if (dport) 5686194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5687194062Svanhu dport->sadb_x_nat_t_port_port); 5688194062Svanhu } 5689194062Svanhu#endif 5690194062Svanhu 5691105197Ssam /* get a SA header */ 5692120585Ssam SAHTREE_LOCK(); 5693181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5694105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5695105197Ssam continue; 5696105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5697105197Ssam continue; 5698105197Ssam 5699105197Ssam /* get a SA with SPI. */ 5700105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5701105197Ssam if (sav) 5702105197Ssam break; 5703105197Ssam } 5704105197Ssam if (sah == NULL) { 5705120585Ssam SAHTREE_UNLOCK(); 5706120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5707105197Ssam return key_senderror(so, m, ENOENT); 5708105197Ssam } 5709105197Ssam 5710105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5711120585Ssam SAHTREE_UNLOCK(); 5712105197Ssam KEY_FREESAV(&sav); 5713105197Ssam 5714105197Ssam { 5715105197Ssam struct mbuf *n; 5716105197Ssam struct sadb_msg *newmsg; 5717105197Ssam 5718105197Ssam /* create new sadb_msg to reply. */ 5719194062Svanhu /* XXX-BZ NAT-T extensions? */ 5720105197Ssam n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5721105197Ssam SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5722105197Ssam if (!n) 5723105197Ssam return key_senderror(so, m, ENOBUFS); 5724105197Ssam 5725105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5726105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5727105197Ssam if (n == NULL) 5728105197Ssam return key_senderror(so, m, ENOBUFS); 5729105197Ssam } 5730105197Ssam newmsg = mtod(n, struct sadb_msg *); 5731105197Ssam newmsg->sadb_msg_errno = 0; 5732105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5733105197Ssam 5734105197Ssam m_freem(m); 5735105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5736105197Ssam } 5737105197Ssam} 5738105197Ssam 5739105197Ssam/* 5740105197Ssam * delete all SAs for src/dst. Called from key_delete(). 5741105197Ssam */ 5742105197Ssamstatic int 5743189004Srdivackykey_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp, 5744189004Srdivacky u_int16_t proto) 5745105197Ssam{ 5746105197Ssam struct sadb_address *src0, *dst0; 5747105197Ssam struct secasindex saidx; 5748105197Ssam struct secashead *sah; 5749105197Ssam struct secasvar *sav, *nextsav; 5750105197Ssam u_int stateidx, state; 5751105197Ssam 5752105197Ssam src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]); 5753105197Ssam dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]); 5754105197Ssam 5755105197Ssam /* XXX boundary check against sa_len */ 5756105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5757105197Ssam 5758194062Svanhu /* 5759194062Svanhu * Make sure the port numbers are zero. 5760194062Svanhu * In case of NAT-T we will update them later if needed. 5761194062Svanhu */ 5762194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5763194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5764194062Svanhu 5765194062Svanhu#ifdef IPSEC_NAT_T 5766194062Svanhu /* 5767194062Svanhu * Handle NAT-T info if present. 5768194062Svanhu */ 5769194062Svanhu 5770194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5771194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5772194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5773194062Svanhu 5774194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5775194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5776194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5777194062Svanhu __func__)); 5778194062Svanhu return key_senderror(so, m, EINVAL); 5779194062Svanhu } 5780194062Svanhu 5781194062Svanhu sport = (struct sadb_x_nat_t_port *) 5782194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5783194062Svanhu dport = (struct sadb_x_nat_t_port *) 5784194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5785194062Svanhu 5786194062Svanhu if (sport) 5787194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5788194062Svanhu sport->sadb_x_nat_t_port_port); 5789194062Svanhu if (dport) 5790194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5791194062Svanhu dport->sadb_x_nat_t_port_port); 5792194062Svanhu } 5793194062Svanhu#endif 5794194062Svanhu 5795120585Ssam SAHTREE_LOCK(); 5796181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5797105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5798105197Ssam continue; 5799105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5800105197Ssam continue; 5801105197Ssam 5802105197Ssam /* Delete all non-LARVAL SAs. */ 5803105197Ssam for (stateidx = 0; 5804185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 5805105197Ssam stateidx++) { 5806185348Szec state = saorder_state_alive[stateidx]; 5807105197Ssam if (state == SADB_SASTATE_LARVAL) 5808105197Ssam continue; 5809105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 5810105197Ssam sav != NULL; sav = nextsav) { 5811105197Ssam nextsav = LIST_NEXT(sav, chain); 5812105197Ssam /* sanity check */ 5813105197Ssam if (sav->state != state) { 5814120585Ssam ipseclog((LOG_DEBUG, "%s: invalid " 5815120585Ssam "sav->state (queue %d SA %d)\n", 5816120585Ssam __func__, state, sav->state)); 5817105197Ssam continue; 5818105197Ssam } 5819105197Ssam 5820105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5821105197Ssam KEY_FREESAV(&sav); 5822105197Ssam } 5823105197Ssam } 5824105197Ssam } 5825120585Ssam SAHTREE_UNLOCK(); 5826105197Ssam { 5827105197Ssam struct mbuf *n; 5828105197Ssam struct sadb_msg *newmsg; 5829105197Ssam 5830105197Ssam /* create new sadb_msg to reply. */ 5831194062Svanhu /* XXX-BZ NAT-T extensions? */ 5832105197Ssam n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5833105197Ssam SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5834105197Ssam if (!n) 5835105197Ssam return key_senderror(so, m, ENOBUFS); 5836105197Ssam 5837105197Ssam if (n->m_len < sizeof(struct sadb_msg)) { 5838105197Ssam n = m_pullup(n, sizeof(struct sadb_msg)); 5839105197Ssam if (n == NULL) 5840105197Ssam return key_senderror(so, m, ENOBUFS); 5841105197Ssam } 5842105197Ssam newmsg = mtod(n, struct sadb_msg *); 5843105197Ssam newmsg->sadb_msg_errno = 0; 5844105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len); 5845105197Ssam 5846105197Ssam m_freem(m); 5847105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5848105197Ssam } 5849105197Ssam} 5850105197Ssam 5851105197Ssam/* 5852105197Ssam * SADB_GET processing 5853105197Ssam * receive 5854105197Ssam * <base, SA(*), address(SD)> 5855105197Ssam * from the ikmpd, and get a SP and a SA to respond, 5856105197Ssam * and send, 5857105197Ssam * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5858105197Ssam * (identity(SD),) (sensitivity)> 5859105197Ssam * to the ikmpd. 5860105197Ssam * 5861105197Ssam * m will always be freed. 5862105197Ssam */ 5863105197Ssamstatic int 5864105197Ssamkey_get(so, m, mhp) 5865105197Ssam struct socket *so; 5866105197Ssam struct mbuf *m; 5867105197Ssam const struct sadb_msghdr *mhp; 5868105197Ssam{ 5869105197Ssam struct sadb_sa *sa0; 5870105197Ssam struct sadb_address *src0, *dst0; 5871105197Ssam struct secasindex saidx; 5872105197Ssam struct secashead *sah; 5873105197Ssam struct secasvar *sav = NULL; 5874105197Ssam u_int16_t proto; 5875105197Ssam 5876120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 5877120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 5878120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 5879120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 5880105197Ssam 5881105197Ssam /* map satype to proto */ 5882105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5883120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 5884120585Ssam __func__)); 5885105197Ssam return key_senderror(so, m, EINVAL); 5886105197Ssam } 5887105197Ssam 5888105197Ssam if (mhp->ext[SADB_EXT_SA] == NULL || 5889105197Ssam mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5890105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5891120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5892120585Ssam __func__)); 5893105197Ssam return key_senderror(so, m, EINVAL); 5894105197Ssam } 5895105197Ssam if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5896105197Ssam mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5897105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5898120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 5899120585Ssam __func__)); 5900105197Ssam return key_senderror(so, m, EINVAL); 5901105197Ssam } 5902105197Ssam 5903105197Ssam sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5904105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 5905105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 5906105197Ssam 5907105197Ssam /* XXX boundary check against sa_len */ 5908105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 5909105197Ssam 5910194062Svanhu /* 5911194062Svanhu * Make sure the port numbers are zero. 5912194062Svanhu * In case of NAT-T we will update them later if needed. 5913194062Svanhu */ 5914194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 5915194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 5916194062Svanhu 5917194062Svanhu#ifdef IPSEC_NAT_T 5918194062Svanhu /* 5919194062Svanhu * Handle NAT-T info if present. 5920194062Svanhu */ 5921194062Svanhu 5922194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 5923194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 5924194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 5925194062Svanhu 5926194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 5927194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5928194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 5929194062Svanhu __func__)); 5930194062Svanhu return key_senderror(so, m, EINVAL); 5931194062Svanhu } 5932194062Svanhu 5933194062Svanhu sport = (struct sadb_x_nat_t_port *) 5934194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5935194062Svanhu dport = (struct sadb_x_nat_t_port *) 5936194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5937194062Svanhu 5938194062Svanhu if (sport) 5939194062Svanhu KEY_PORTTOSADDR(&saidx.src, 5940194062Svanhu sport->sadb_x_nat_t_port_port); 5941194062Svanhu if (dport) 5942194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 5943194062Svanhu dport->sadb_x_nat_t_port_port); 5944194062Svanhu } 5945194062Svanhu#endif 5946194062Svanhu 5947105197Ssam /* get a SA header */ 5948120585Ssam SAHTREE_LOCK(); 5949181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 5950105197Ssam if (sah->state == SADB_SASTATE_DEAD) 5951105197Ssam continue; 5952105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0) 5953105197Ssam continue; 5954105197Ssam 5955105197Ssam /* get a SA with SPI. */ 5956105197Ssam sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5957105197Ssam if (sav) 5958105197Ssam break; 5959105197Ssam } 5960120585Ssam SAHTREE_UNLOCK(); 5961105197Ssam if (sah == NULL) { 5962120585Ssam ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__)); 5963105197Ssam return key_senderror(so, m, ENOENT); 5964105197Ssam } 5965105197Ssam 5966105197Ssam { 5967105197Ssam struct mbuf *n; 5968105197Ssam u_int8_t satype; 5969105197Ssam 5970105197Ssam /* map proto to satype */ 5971105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 5972120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n", 5973120585Ssam __func__)); 5974105197Ssam return key_senderror(so, m, EINVAL); 5975105197Ssam } 5976105197Ssam 5977105197Ssam /* create new sadb_msg to reply. */ 5978105197Ssam n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 5979105197Ssam mhp->msg->sadb_msg_pid); 5980105197Ssam if (!n) 5981105197Ssam return key_senderror(so, m, ENOBUFS); 5982105197Ssam 5983105197Ssam m_freem(m); 5984105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5985105197Ssam } 5986105197Ssam} 5987105197Ssam 5988105197Ssam/* XXX make it sysctl-configurable? */ 5989105197Ssamstatic void 5990105197Ssamkey_getcomb_setlifetime(comb) 5991105197Ssam struct sadb_comb *comb; 5992105197Ssam{ 5993105197Ssam 5994105197Ssam comb->sadb_comb_soft_allocations = 1; 5995105197Ssam comb->sadb_comb_hard_allocations = 1; 5996105197Ssam comb->sadb_comb_soft_bytes = 0; 5997105197Ssam comb->sadb_comb_hard_bytes = 0; 5998105197Ssam comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 5999105197Ssam comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100; 6000105197Ssam comb->sadb_comb_soft_usetime = 28800; /* 8 hours */ 6001105197Ssam comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 6002105197Ssam} 6003105197Ssam 6004105197Ssam/* 6005105197Ssam * XXX reorder combinations by preference 6006105197Ssam * XXX no idea if the user wants ESP authentication or not 6007105197Ssam */ 6008105197Ssamstatic struct mbuf * 6009105197Ssamkey_getcomb_esp() 6010105197Ssam{ 6011105197Ssam struct sadb_comb *comb; 6012105197Ssam struct enc_xform *algo; 6013105197Ssam struct mbuf *result = NULL, *m, *n; 6014105197Ssam int encmin; 6015105197Ssam int i, off, o; 6016105197Ssam int totlen; 6017105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6018105197Ssam 6019105197Ssam m = NULL; 6020105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6021105197Ssam algo = esp_algorithm_lookup(i); 6022105197Ssam if (algo == NULL) 6023105197Ssam continue; 6024105197Ssam 6025105197Ssam /* discard algorithms with key size smaller than system min */ 6026181803Sbz if (_BITS(algo->maxkey) < V_ipsec_esp_keymin) 6027105197Ssam continue; 6028181803Sbz if (_BITS(algo->minkey) < V_ipsec_esp_keymin) 6029181803Sbz encmin = V_ipsec_esp_keymin; 6030105197Ssam else 6031105197Ssam encmin = _BITS(algo->minkey); 6032105197Ssam 6033181803Sbz if (V_ipsec_esp_auth) 6034105197Ssam m = key_getcomb_ah(); 6035105197Ssam else { 6036120585Ssam IPSEC_ASSERT(l <= MLEN, 6037120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6038111119Simp MGET(m, M_DONTWAIT, MT_DATA); 6039105197Ssam if (m) { 6040105197Ssam M_ALIGN(m, l); 6041105197Ssam m->m_len = l; 6042105197Ssam m->m_next = NULL; 6043105197Ssam bzero(mtod(m, caddr_t), m->m_len); 6044105197Ssam } 6045105197Ssam } 6046105197Ssam if (!m) 6047105197Ssam goto fail; 6048105197Ssam 6049105197Ssam totlen = 0; 6050105197Ssam for (n = m; n; n = n->m_next) 6051105197Ssam totlen += n->m_len; 6052120585Ssam IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l)); 6053105197Ssam 6054105197Ssam for (off = 0; off < totlen; off += l) { 6055105197Ssam n = m_pulldown(m, off, l, &o); 6056105197Ssam if (!n) { 6057105197Ssam /* m is already freed */ 6058105197Ssam goto fail; 6059105197Ssam } 6060105197Ssam comb = (struct sadb_comb *)(mtod(n, caddr_t) + o); 6061105197Ssam bzero(comb, sizeof(*comb)); 6062105197Ssam key_getcomb_setlifetime(comb); 6063105197Ssam comb->sadb_comb_encrypt = i; 6064105197Ssam comb->sadb_comb_encrypt_minbits = encmin; 6065105197Ssam comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6066105197Ssam } 6067105197Ssam 6068105197Ssam if (!result) 6069105197Ssam result = m; 6070105197Ssam else 6071105197Ssam m_cat(result, m); 6072105197Ssam } 6073105197Ssam 6074105197Ssam return result; 6075105197Ssam 6076105197Ssam fail: 6077105197Ssam if (result) 6078105197Ssam m_freem(result); 6079105197Ssam return NULL; 6080105197Ssam} 6081105197Ssam 6082105197Ssamstatic void 6083105197Ssamkey_getsizes_ah( 6084105197Ssam const struct auth_hash *ah, 6085105197Ssam int alg, 6086105197Ssam u_int16_t* min, 6087105197Ssam u_int16_t* max) 6088105197Ssam{ 6089183550Szec 6090105197Ssam *min = *max = ah->keysize; 6091105197Ssam if (ah->keysize == 0) { 6092105197Ssam /* 6093105197Ssam * Transform takes arbitrary key size but algorithm 6094105197Ssam * key size is restricted. Enforce this here. 6095105197Ssam */ 6096105197Ssam switch (alg) { 6097105197Ssam case SADB_X_AALG_MD5: *min = *max = 16; break; 6098105197Ssam case SADB_X_AALG_SHA: *min = *max = 20; break; 6099105197Ssam case SADB_X_AALG_NULL: *min = 1; *max = 256; break; 6100105197Ssam default: 6101120585Ssam DPRINTF(("%s: unknown AH algorithm %u\n", 6102120585Ssam __func__, alg)); 6103105197Ssam break; 6104105197Ssam } 6105105197Ssam } 6106105197Ssam} 6107105197Ssam 6108105197Ssam/* 6109105197Ssam * XXX reorder combinations by preference 6110105197Ssam */ 6111105197Ssamstatic struct mbuf * 6112105197Ssamkey_getcomb_ah() 6113105197Ssam{ 6114105197Ssam struct sadb_comb *comb; 6115105197Ssam struct auth_hash *algo; 6116105197Ssam struct mbuf *m; 6117105197Ssam u_int16_t minkeysize, maxkeysize; 6118105197Ssam int i; 6119105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6120105197Ssam 6121105197Ssam m = NULL; 6122105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6123105197Ssam#if 1 6124105197Ssam /* we prefer HMAC algorithms, not old algorithms */ 6125105197Ssam if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC) 6126105197Ssam continue; 6127105197Ssam#endif 6128105197Ssam algo = ah_algorithm_lookup(i); 6129105197Ssam if (!algo) 6130105197Ssam continue; 6131105197Ssam key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6132105197Ssam /* discard algorithms with key size smaller than system min */ 6133181803Sbz if (_BITS(minkeysize) < V_ipsec_ah_keymin) 6134105197Ssam continue; 6135105197Ssam 6136105197Ssam if (!m) { 6137120585Ssam IPSEC_ASSERT(l <= MLEN, 6138120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6139111119Simp MGET(m, M_DONTWAIT, MT_DATA); 6140105197Ssam if (m) { 6141105197Ssam M_ALIGN(m, l); 6142105197Ssam m->m_len = l; 6143105197Ssam m->m_next = NULL; 6144105197Ssam } 6145105197Ssam } else 6146111119Simp M_PREPEND(m, l, M_DONTWAIT); 6147105197Ssam if (!m) 6148105197Ssam return NULL; 6149105197Ssam 6150105197Ssam comb = mtod(m, struct sadb_comb *); 6151105197Ssam bzero(comb, sizeof(*comb)); 6152105197Ssam key_getcomb_setlifetime(comb); 6153105197Ssam comb->sadb_comb_auth = i; 6154105197Ssam comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6155105197Ssam comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6156105197Ssam } 6157105197Ssam 6158105197Ssam return m; 6159105197Ssam} 6160105197Ssam 6161105197Ssam/* 6162105197Ssam * not really an official behavior. discussed in pf_key@inner.net in Sep2000. 6163105197Ssam * XXX reorder combinations by preference 6164105197Ssam */ 6165105197Ssamstatic struct mbuf * 6166105197Ssamkey_getcomb_ipcomp() 6167105197Ssam{ 6168105197Ssam struct sadb_comb *comb; 6169105197Ssam struct comp_algo *algo; 6170105197Ssam struct mbuf *m; 6171105197Ssam int i; 6172105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6173105197Ssam 6174105197Ssam m = NULL; 6175105197Ssam for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6176105197Ssam algo = ipcomp_algorithm_lookup(i); 6177105197Ssam if (!algo) 6178105197Ssam continue; 6179105197Ssam 6180105197Ssam if (!m) { 6181120585Ssam IPSEC_ASSERT(l <= MLEN, 6182120585Ssam ("l=%u > MLEN=%lu", l, (u_long) MLEN)); 6183111119Simp MGET(m, M_DONTWAIT, MT_DATA); 6184105197Ssam if (m) { 6185105197Ssam M_ALIGN(m, l); 6186105197Ssam m->m_len = l; 6187105197Ssam m->m_next = NULL; 6188105197Ssam } 6189105197Ssam } else 6190111119Simp M_PREPEND(m, l, M_DONTWAIT); 6191105197Ssam if (!m) 6192105197Ssam return NULL; 6193105197Ssam 6194105197Ssam comb = mtod(m, struct sadb_comb *); 6195105197Ssam bzero(comb, sizeof(*comb)); 6196105197Ssam key_getcomb_setlifetime(comb); 6197105197Ssam comb->sadb_comb_encrypt = i; 6198105197Ssam /* what should we set into sadb_comb_*_{min,max}bits? */ 6199105197Ssam } 6200105197Ssam 6201105197Ssam return m; 6202105197Ssam} 6203105197Ssam 6204105197Ssam/* 6205105197Ssam * XXX no way to pass mode (transport/tunnel) to userland 6206105197Ssam * XXX replay checking? 6207105197Ssam * XXX sysctl interface to ipsec_{ah,esp}_keymin 6208105197Ssam */ 6209105197Ssamstatic struct mbuf * 6210105197Ssamkey_getprop(saidx) 6211105197Ssam const struct secasindex *saidx; 6212105197Ssam{ 6213105197Ssam struct sadb_prop *prop; 6214105197Ssam struct mbuf *m, *n; 6215105197Ssam const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6216105197Ssam int totlen; 6217105197Ssam 6218105197Ssam switch (saidx->proto) { 6219105197Ssam case IPPROTO_ESP: 6220105197Ssam m = key_getcomb_esp(); 6221105197Ssam break; 6222105197Ssam case IPPROTO_AH: 6223105197Ssam m = key_getcomb_ah(); 6224105197Ssam break; 6225105197Ssam case IPPROTO_IPCOMP: 6226105197Ssam m = key_getcomb_ipcomp(); 6227105197Ssam break; 6228105197Ssam default: 6229105197Ssam return NULL; 6230105197Ssam } 6231105197Ssam 6232105197Ssam if (!m) 6233105197Ssam return NULL; 6234111119Simp M_PREPEND(m, l, M_DONTWAIT); 6235105197Ssam if (!m) 6236105197Ssam return NULL; 6237105197Ssam 6238105197Ssam totlen = 0; 6239105197Ssam for (n = m; n; n = n->m_next) 6240105197Ssam totlen += n->m_len; 6241105197Ssam 6242105197Ssam prop = mtod(m, struct sadb_prop *); 6243105197Ssam bzero(prop, sizeof(*prop)); 6244105197Ssam prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6245105197Ssam prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6246105197Ssam prop->sadb_prop_replay = 32; /* XXX */ 6247105197Ssam 6248105197Ssam return m; 6249105197Ssam} 6250105197Ssam 6251105197Ssam/* 6252105197Ssam * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2(). 6253105197Ssam * send 6254105197Ssam * <base, SA, address(SD), (address(P)), x_policy, 6255105197Ssam * (identity(SD),) (sensitivity,) proposal> 6256105197Ssam * to KMD, and expect to receive 6257105197Ssam * <base> with SADB_ACQUIRE if error occured, 6258105197Ssam * or 6259105197Ssam * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6260105197Ssam * from KMD by PF_KEY. 6261105197Ssam * 6262105197Ssam * XXX x_policy is outside of RFC2367 (KAME extension). 6263105197Ssam * XXX sensitivity is not supported. 6264105197Ssam * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6265105197Ssam * see comment for key_getcomb_ipcomp(). 6266105197Ssam * 6267105197Ssam * OUT: 6268105197Ssam * 0 : succeed 6269105197Ssam * others: error number 6270105197Ssam */ 6271105197Ssamstatic int 6272105197Ssamkey_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6273105197Ssam{ 6274105197Ssam struct mbuf *result = NULL, *m; 6275105197Ssam struct secacq *newacq; 6276105197Ssam u_int8_t satype; 6277105197Ssam int error = -1; 6278105197Ssam u_int32_t seq; 6279105197Ssam 6280120585Ssam IPSEC_ASSERT(saidx != NULL, ("null saidx")); 6281105197Ssam satype = key_proto2satype(saidx->proto); 6282120585Ssam IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto)); 6283105197Ssam 6284105197Ssam /* 6285105197Ssam * We never do anything about acquirng SA. There is anather 6286105197Ssam * solution that kernel blocks to send SADB_ACQUIRE message until 6287105197Ssam * getting something message from IKEd. In later case, to be 6288105197Ssam * managed with ACQUIRING list. 6289105197Ssam */ 6290108533Sschweikh /* Get an entry to check whether sending message or not. */ 6291105197Ssam if ((newacq = key_getacq(saidx)) != NULL) { 6292181803Sbz if (V_key_blockacq_count < newacq->count) { 6293105197Ssam /* reset counter and do send message. */ 6294105197Ssam newacq->count = 0; 6295105197Ssam } else { 6296105197Ssam /* increment counter and do nothing. */ 6297105197Ssam newacq->count++; 6298105197Ssam return 0; 6299105197Ssam } 6300105197Ssam } else { 6301105197Ssam /* make new entry for blocking to send SADB_ACQUIRE. */ 6302105197Ssam if ((newacq = key_newacq(saidx)) == NULL) 6303105197Ssam return ENOBUFS; 6304105197Ssam } 6305105197Ssam 6306105197Ssam 6307105197Ssam seq = newacq->seq; 6308105197Ssam m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6309105197Ssam if (!m) { 6310105197Ssam error = ENOBUFS; 6311105197Ssam goto fail; 6312105197Ssam } 6313105197Ssam result = m; 6314105197Ssam 6315194062Svanhu /* 6316194062Svanhu * No SADB_X_EXT_NAT_T_* here: we do not know 6317194062Svanhu * anything related to NAT-T at this time. 6318194062Svanhu */ 6319194062Svanhu 6320105197Ssam /* set sadb_address for saidx's. */ 6321105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6322105197Ssam &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6323105197Ssam if (!m) { 6324105197Ssam error = ENOBUFS; 6325105197Ssam goto fail; 6326105197Ssam } 6327105197Ssam m_cat(result, m); 6328105197Ssam 6329105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6330105197Ssam &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY); 6331105197Ssam if (!m) { 6332105197Ssam error = ENOBUFS; 6333105197Ssam goto fail; 6334105197Ssam } 6335105197Ssam m_cat(result, m); 6336105197Ssam 6337105197Ssam /* XXX proxy address (optional) */ 6338105197Ssam 6339105197Ssam /* set sadb_x_policy */ 6340105197Ssam if (sp) { 6341105197Ssam m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6342105197Ssam if (!m) { 6343105197Ssam error = ENOBUFS; 6344105197Ssam goto fail; 6345105197Ssam } 6346105197Ssam m_cat(result, m); 6347105197Ssam } 6348105197Ssam 6349105197Ssam /* XXX identity (optional) */ 6350105197Ssam#if 0 6351105197Ssam if (idexttype && fqdn) { 6352105197Ssam /* create identity extension (FQDN) */ 6353105197Ssam struct sadb_ident *id; 6354105197Ssam int fqdnlen; 6355105197Ssam 6356105197Ssam fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6357105197Ssam id = (struct sadb_ident *)p; 6358105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6359105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6360105197Ssam id->sadb_ident_exttype = idexttype; 6361105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6362105197Ssam bcopy(fqdn, id + 1, fqdnlen); 6363105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6364105197Ssam } 6365105197Ssam 6366105197Ssam if (idexttype) { 6367105197Ssam /* create identity extension (USERFQDN) */ 6368105197Ssam struct sadb_ident *id; 6369105197Ssam int userfqdnlen; 6370105197Ssam 6371105197Ssam if (userfqdn) { 6372105197Ssam /* +1 for terminating-NUL */ 6373105197Ssam userfqdnlen = strlen(userfqdn) + 1; 6374105197Ssam } else 6375105197Ssam userfqdnlen = 0; 6376105197Ssam id = (struct sadb_ident *)p; 6377105197Ssam bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6378105197Ssam id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6379105197Ssam id->sadb_ident_exttype = idexttype; 6380105197Ssam id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6381105197Ssam /* XXX is it correct? */ 6382105197Ssam if (curproc && curproc->p_cred) 6383105197Ssam id->sadb_ident_id = curproc->p_cred->p_ruid; 6384105197Ssam if (userfqdn && userfqdnlen) 6385105197Ssam bcopy(userfqdn, id + 1, userfqdnlen); 6386105197Ssam p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6387105197Ssam } 6388105197Ssam#endif 6389105197Ssam 6390105197Ssam /* XXX sensitivity (optional) */ 6391105197Ssam 6392105197Ssam /* create proposal/combination extension */ 6393105197Ssam m = key_getprop(saidx); 6394105197Ssam#if 0 6395105197Ssam /* 6396105197Ssam * spec conformant: always attach proposal/combination extension, 6397105197Ssam * the problem is that we have no way to attach it for ipcomp, 6398105197Ssam * due to the way sadb_comb is declared in RFC2367. 6399105197Ssam */ 6400105197Ssam if (!m) { 6401105197Ssam error = ENOBUFS; 6402105197Ssam goto fail; 6403105197Ssam } 6404105197Ssam m_cat(result, m); 6405105197Ssam#else 6406105197Ssam /* 6407105197Ssam * outside of spec; make proposal/combination extension optional. 6408105197Ssam */ 6409105197Ssam if (m) 6410105197Ssam m_cat(result, m); 6411105197Ssam#endif 6412105197Ssam 6413105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 6414105197Ssam error = EINVAL; 6415105197Ssam goto fail; 6416105197Ssam } 6417105197Ssam 6418105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 6419105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 6420105197Ssam if (result == NULL) { 6421105197Ssam error = ENOBUFS; 6422105197Ssam goto fail; 6423105197Ssam } 6424105197Ssam } 6425105197Ssam 6426105197Ssam result->m_pkthdr.len = 0; 6427105197Ssam for (m = result; m; m = m->m_next) 6428105197Ssam result->m_pkthdr.len += m->m_len; 6429105197Ssam 6430105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 6431105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 6432105197Ssam 6433105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6434105197Ssam 6435105197Ssam fail: 6436105197Ssam if (result) 6437105197Ssam m_freem(result); 6438105197Ssam return error; 6439105197Ssam} 6440105197Ssam 6441105197Ssamstatic struct secacq * 6442105197Ssamkey_newacq(const struct secasindex *saidx) 6443105197Ssam{ 6444105197Ssam struct secacq *newacq; 6445105197Ssam 6446105197Ssam /* get new entry */ 6447119643Ssam newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6448105197Ssam if (newacq == NULL) { 6449120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6450105197Ssam return NULL; 6451105197Ssam } 6452105197Ssam 6453105197Ssam /* copy secindex */ 6454105197Ssam bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx)); 6455181803Sbz newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq); 6456105197Ssam newacq->created = time_second; 6457105197Ssam newacq->count = 0; 6458105197Ssam 6459119643Ssam /* add to acqtree */ 6460120585Ssam ACQ_LOCK(); 6461181803Sbz LIST_INSERT_HEAD(&V_acqtree, newacq, chain); 6462120585Ssam ACQ_UNLOCK(); 6463119643Ssam 6464105197Ssam return newacq; 6465105197Ssam} 6466105197Ssam 6467105197Ssamstatic struct secacq * 6468105197Ssamkey_getacq(const struct secasindex *saidx) 6469105197Ssam{ 6470105197Ssam struct secacq *acq; 6471105197Ssam 6472120585Ssam ACQ_LOCK(); 6473181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 6474105197Ssam if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY)) 6475119643Ssam break; 6476105197Ssam } 6477120585Ssam ACQ_UNLOCK(); 6478105197Ssam 6479119643Ssam return acq; 6480105197Ssam} 6481105197Ssam 6482105197Ssamstatic struct secacq * 6483105197Ssamkey_getacqbyseq(seq) 6484105197Ssam u_int32_t seq; 6485105197Ssam{ 6486105197Ssam struct secacq *acq; 6487105197Ssam 6488120585Ssam ACQ_LOCK(); 6489181803Sbz LIST_FOREACH(acq, &V_acqtree, chain) { 6490105197Ssam if (acq->seq == seq) 6491119643Ssam break; 6492105197Ssam } 6493120585Ssam ACQ_UNLOCK(); 6494105197Ssam 6495119643Ssam return acq; 6496105197Ssam} 6497105197Ssam 6498105197Ssamstatic struct secspacq * 6499105197Ssamkey_newspacq(spidx) 6500105197Ssam struct secpolicyindex *spidx; 6501105197Ssam{ 6502105197Ssam struct secspacq *acq; 6503105197Ssam 6504105197Ssam /* get new entry */ 6505119643Ssam acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO); 6506105197Ssam if (acq == NULL) { 6507120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6508105197Ssam return NULL; 6509105197Ssam } 6510105197Ssam 6511105197Ssam /* copy secindex */ 6512105197Ssam bcopy(spidx, &acq->spidx, sizeof(acq->spidx)); 6513105197Ssam acq->created = time_second; 6514105197Ssam acq->count = 0; 6515105197Ssam 6516119643Ssam /* add to spacqtree */ 6517120585Ssam SPACQ_LOCK(); 6518181803Sbz LIST_INSERT_HEAD(&V_spacqtree, acq, chain); 6519120585Ssam SPACQ_UNLOCK(); 6520119643Ssam 6521105197Ssam return acq; 6522105197Ssam} 6523105197Ssam 6524105197Ssamstatic struct secspacq * 6525105197Ssamkey_getspacq(spidx) 6526105197Ssam struct secpolicyindex *spidx; 6527105197Ssam{ 6528105197Ssam struct secspacq *acq; 6529105197Ssam 6530120585Ssam SPACQ_LOCK(); 6531181803Sbz LIST_FOREACH(acq, &V_spacqtree, chain) { 6532119643Ssam if (key_cmpspidx_exactly(spidx, &acq->spidx)) { 6533119643Ssam /* NB: return holding spacq_lock */ 6534105197Ssam return acq; 6535119643Ssam } 6536105197Ssam } 6537120585Ssam SPACQ_UNLOCK(); 6538105197Ssam 6539105197Ssam return NULL; 6540105197Ssam} 6541105197Ssam 6542105197Ssam/* 6543105197Ssam * SADB_ACQUIRE processing, 6544105197Ssam * in first situation, is receiving 6545105197Ssam * <base> 6546105197Ssam * from the ikmpd, and clear sequence of its secasvar entry. 6547105197Ssam * 6548105197Ssam * In second situation, is receiving 6549105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6550105197Ssam * from a user land process, and return 6551105197Ssam * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6552105197Ssam * to the socket. 6553105197Ssam * 6554105197Ssam * m will always be freed. 6555105197Ssam */ 6556105197Ssamstatic int 6557105197Ssamkey_acquire2(so, m, mhp) 6558105197Ssam struct socket *so; 6559105197Ssam struct mbuf *m; 6560105197Ssam const struct sadb_msghdr *mhp; 6561105197Ssam{ 6562105197Ssam const struct sadb_address *src0, *dst0; 6563105197Ssam struct secasindex saidx; 6564105197Ssam struct secashead *sah; 6565105197Ssam u_int16_t proto; 6566105197Ssam int error; 6567105197Ssam 6568120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6569120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6570120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6571120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6572105197Ssam 6573105197Ssam /* 6574105197Ssam * Error message from KMd. 6575105197Ssam * We assume that if error was occured in IKEd, the length of PFKEY 6576105197Ssam * message is equal to the size of sadb_msg structure. 6577105197Ssam * We do not raise error even if error occured in this function. 6578105197Ssam */ 6579105197Ssam if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6580105197Ssam struct secacq *acq; 6581105197Ssam 6582105197Ssam /* check sequence number */ 6583105197Ssam if (mhp->msg->sadb_msg_seq == 0) { 6584120585Ssam ipseclog((LOG_DEBUG, "%s: must specify sequence " 6585120585Ssam "number.\n", __func__)); 6586105197Ssam m_freem(m); 6587105197Ssam return 0; 6588105197Ssam } 6589105197Ssam 6590105197Ssam if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) { 6591105197Ssam /* 6592105197Ssam * the specified larval SA is already gone, or we got 6593105197Ssam * a bogus sequence number. we can silently ignore it. 6594105197Ssam */ 6595105197Ssam m_freem(m); 6596105197Ssam return 0; 6597105197Ssam } 6598105197Ssam 6599105197Ssam /* reset acq counter in order to deletion by timehander. */ 6600105197Ssam acq->created = time_second; 6601105197Ssam acq->count = 0; 6602105197Ssam m_freem(m); 6603105197Ssam return 0; 6604105197Ssam } 6605105197Ssam 6606105197Ssam /* 6607105197Ssam * This message is from user land. 6608105197Ssam */ 6609105197Ssam 6610105197Ssam /* map satype to proto */ 6611105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6612120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 6613120585Ssam __func__)); 6614105197Ssam return key_senderror(so, m, EINVAL); 6615105197Ssam } 6616105197Ssam 6617105197Ssam if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6618105197Ssam mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6619105197Ssam mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6620105197Ssam /* error */ 6621120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6622120585Ssam __func__)); 6623105197Ssam return key_senderror(so, m, EINVAL); 6624105197Ssam } 6625105197Ssam if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6626105197Ssam mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6627105197Ssam mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6628105197Ssam /* error */ 6629120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", 6630120585Ssam __func__)); 6631105197Ssam return key_senderror(so, m, EINVAL); 6632105197Ssam } 6633105197Ssam 6634105197Ssam src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 6635105197Ssam dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 6636105197Ssam 6637105197Ssam /* XXX boundary check against sa_len */ 6638105197Ssam KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx); 6639105197Ssam 6640194062Svanhu /* 6641194062Svanhu * Make sure the port numbers are zero. 6642194062Svanhu * In case of NAT-T we will update them later if needed. 6643194062Svanhu */ 6644194062Svanhu KEY_PORTTOSADDR(&saidx.src, 0); 6645194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 0); 6646194062Svanhu 6647194062Svanhu#ifndef IPSEC_NAT_T 6648194062Svanhu /* 6649194062Svanhu * Handle NAT-T info if present. 6650194062Svanhu */ 6651194062Svanhu 6652194062Svanhu if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL && 6653194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) { 6654194062Svanhu struct sadb_x_nat_t_port *sport, *dport; 6655194062Svanhu 6656194062Svanhu if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) || 6657194062Svanhu mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 6658194062Svanhu ipseclog((LOG_DEBUG, "%s: invalid message.\n", 6659194062Svanhu __func__)); 6660194062Svanhu return key_senderror(so, m, EINVAL); 6661194062Svanhu } 6662194062Svanhu 6663194062Svanhu sport = (struct sadb_x_nat_t_port *) 6664194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 6665194062Svanhu dport = (struct sadb_x_nat_t_port *) 6666194062Svanhu mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 6667194062Svanhu 6668194062Svanhu if (sport) 6669194062Svanhu KEY_PORTTOSADDR(&saidx.src, 6670194062Svanhu sport->sadb_x_nat_t_port_port); 6671194062Svanhu if (dport) 6672194062Svanhu KEY_PORTTOSADDR(&saidx.dst, 6673194062Svanhu dport->sadb_x_nat_t_port_port); 6674194062Svanhu } 6675194062Svanhu#endif 6676194062Svanhu 6677105197Ssam /* get a SA index */ 6678120585Ssam SAHTREE_LOCK(); 6679181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 6680105197Ssam if (sah->state == SADB_SASTATE_DEAD) 6681105197Ssam continue; 6682105197Ssam if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID)) 6683105197Ssam break; 6684105197Ssam } 6685120585Ssam SAHTREE_UNLOCK(); 6686105197Ssam if (sah != NULL) { 6687120585Ssam ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__)); 6688105197Ssam return key_senderror(so, m, EEXIST); 6689105197Ssam } 6690105197Ssam 6691105197Ssam error = key_acquire(&saidx, NULL); 6692105197Ssam if (error != 0) { 6693120585Ssam ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n", 6694120585Ssam __func__, mhp->msg->sadb_msg_errno)); 6695105197Ssam return key_senderror(so, m, error); 6696105197Ssam } 6697105197Ssam 6698105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6699105197Ssam} 6700105197Ssam 6701105197Ssam/* 6702105197Ssam * SADB_REGISTER processing. 6703105197Ssam * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6704105197Ssam * receive 6705105197Ssam * <base> 6706105197Ssam * from the ikmpd, and register a socket to send PF_KEY messages, 6707105197Ssam * and send 6708105197Ssam * <base, supported> 6709105197Ssam * to KMD by PF_KEY. 6710105197Ssam * If socket is detached, must free from regnode. 6711105197Ssam * 6712105197Ssam * m will always be freed. 6713105197Ssam */ 6714105197Ssamstatic int 6715105197Ssamkey_register(so, m, mhp) 6716105197Ssam struct socket *so; 6717105197Ssam struct mbuf *m; 6718105197Ssam const struct sadb_msghdr *mhp; 6719105197Ssam{ 6720105197Ssam struct secreg *reg, *newreg = 0; 6721105197Ssam 6722120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 6723120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 6724120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 6725120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 6726105197Ssam 6727105197Ssam /* check for invalid register message */ 6728181803Sbz if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0])) 6729105197Ssam return key_senderror(so, m, EINVAL); 6730105197Ssam 6731105197Ssam /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6732105197Ssam if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6733105197Ssam goto setmsg; 6734105197Ssam 6735105197Ssam /* check whether existing or not */ 6736120585Ssam REGTREE_LOCK(); 6737181803Sbz LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) { 6738105197Ssam if (reg->so == so) { 6739120585Ssam REGTREE_UNLOCK(); 6740120585Ssam ipseclog((LOG_DEBUG, "%s: socket exists already.\n", 6741120585Ssam __func__)); 6742105197Ssam return key_senderror(so, m, EEXIST); 6743105197Ssam } 6744105197Ssam } 6745105197Ssam 6746105197Ssam /* create regnode */ 6747119643Ssam newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO); 6748105197Ssam if (newreg == NULL) { 6749120585Ssam REGTREE_UNLOCK(); 6750120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 6751105197Ssam return key_senderror(so, m, ENOBUFS); 6752105197Ssam } 6753105197Ssam 6754105197Ssam newreg->so = so; 6755105197Ssam ((struct keycb *)sotorawcb(so))->kp_registered++; 6756105197Ssam 6757105197Ssam /* add regnode to regtree. */ 6758181803Sbz LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain); 6759120585Ssam REGTREE_UNLOCK(); 6760105197Ssam 6761105197Ssam setmsg: 6762105197Ssam { 6763105197Ssam struct mbuf *n; 6764105197Ssam struct sadb_msg *newmsg; 6765105197Ssam struct sadb_supported *sup; 6766105197Ssam u_int len, alen, elen; 6767105197Ssam int off; 6768105197Ssam int i; 6769105197Ssam struct sadb_alg *alg; 6770105197Ssam 6771105197Ssam /* create new sadb_msg to reply. */ 6772105197Ssam alen = 0; 6773105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6774105197Ssam if (ah_algorithm_lookup(i)) 6775105197Ssam alen += sizeof(struct sadb_alg); 6776105197Ssam } 6777105197Ssam if (alen) 6778105197Ssam alen += sizeof(struct sadb_supported); 6779105197Ssam elen = 0; 6780105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6781105197Ssam if (esp_algorithm_lookup(i)) 6782105197Ssam elen += sizeof(struct sadb_alg); 6783105197Ssam } 6784105197Ssam if (elen) 6785105197Ssam elen += sizeof(struct sadb_supported); 6786105197Ssam 6787105197Ssam len = sizeof(struct sadb_msg) + alen + elen; 6788105197Ssam 6789105197Ssam if (len > MCLBYTES) 6790105197Ssam return key_senderror(so, m, ENOBUFS); 6791105197Ssam 6792111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 6793105197Ssam if (len > MHLEN) { 6794111119Simp MCLGET(n, M_DONTWAIT); 6795105197Ssam if ((n->m_flags & M_EXT) == 0) { 6796105197Ssam m_freem(n); 6797105197Ssam n = NULL; 6798105197Ssam } 6799105197Ssam } 6800105197Ssam if (!n) 6801105197Ssam return key_senderror(so, m, ENOBUFS); 6802105197Ssam 6803105197Ssam n->m_pkthdr.len = n->m_len = len; 6804105197Ssam n->m_next = NULL; 6805105197Ssam off = 0; 6806105197Ssam 6807105197Ssam m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off); 6808105197Ssam newmsg = mtod(n, struct sadb_msg *); 6809105197Ssam newmsg->sadb_msg_errno = 0; 6810105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(len); 6811105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6812105197Ssam 6813105197Ssam /* for authentication algorithm */ 6814105197Ssam if (alen) { 6815105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6816105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(alen); 6817105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6818105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6819105197Ssam 6820105197Ssam for (i = 1; i <= SADB_AALG_MAX; i++) { 6821105197Ssam struct auth_hash *aalgo; 6822105197Ssam u_int16_t minkeysize, maxkeysize; 6823105197Ssam 6824105197Ssam aalgo = ah_algorithm_lookup(i); 6825105197Ssam if (!aalgo) 6826105197Ssam continue; 6827105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6828105197Ssam alg->sadb_alg_id = i; 6829105197Ssam alg->sadb_alg_ivlen = 0; 6830105197Ssam key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6831105197Ssam alg->sadb_alg_minbits = _BITS(minkeysize); 6832105197Ssam alg->sadb_alg_maxbits = _BITS(maxkeysize); 6833105197Ssam off += PFKEY_ALIGN8(sizeof(*alg)); 6834105197Ssam } 6835105197Ssam } 6836105197Ssam 6837105197Ssam /* for encryption algorithm */ 6838105197Ssam if (elen) { 6839105197Ssam sup = (struct sadb_supported *)(mtod(n, caddr_t) + off); 6840105197Ssam sup->sadb_supported_len = PFKEY_UNIT64(elen); 6841105197Ssam sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6842105197Ssam off += PFKEY_ALIGN8(sizeof(*sup)); 6843105197Ssam 6844105197Ssam for (i = 1; i <= SADB_EALG_MAX; i++) { 6845105197Ssam struct enc_xform *ealgo; 6846105197Ssam 6847105197Ssam ealgo = esp_algorithm_lookup(i); 6848105197Ssam if (!ealgo) 6849105197Ssam continue; 6850105197Ssam alg = (struct sadb_alg *)(mtod(n, caddr_t) + off); 6851105197Ssam alg->sadb_alg_id = i; 6852105197Ssam alg->sadb_alg_ivlen = ealgo->blocksize; 6853105197Ssam alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6854105197Ssam alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6855105197Ssam off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6856105197Ssam } 6857105197Ssam } 6858105197Ssam 6859120585Ssam IPSEC_ASSERT(off == len, 6860120585Ssam ("length assumption failed (off %u len %u)", off, len)); 6861105197Ssam 6862105197Ssam m_freem(m); 6863105197Ssam return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6864105197Ssam } 6865105197Ssam} 6866105197Ssam 6867105197Ssam/* 6868105197Ssam * free secreg entry registered. 6869105197Ssam * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6870105197Ssam */ 6871105197Ssamvoid 6872119643Ssamkey_freereg(struct socket *so) 6873105197Ssam{ 6874105197Ssam struct secreg *reg; 6875105197Ssam int i; 6876105197Ssam 6877120585Ssam IPSEC_ASSERT(so != NULL, ("NULL so")); 6878105197Ssam 6879105197Ssam /* 6880105197Ssam * check whether existing or not. 6881105197Ssam * check all type of SA, because there is a potential that 6882105197Ssam * one socket is registered to multiple type of SA. 6883105197Ssam */ 6884120585Ssam REGTREE_LOCK(); 6885105197Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6886181803Sbz LIST_FOREACH(reg, &V_regtree[i], chain) { 6887119643Ssam if (reg->so == so && __LIST_CHAINED(reg)) { 6888105197Ssam LIST_REMOVE(reg, chain); 6889119643Ssam free(reg, M_IPSEC_SAR); 6890105197Ssam break; 6891105197Ssam } 6892105197Ssam } 6893105197Ssam } 6894120585Ssam REGTREE_UNLOCK(); 6895105197Ssam} 6896105197Ssam 6897105197Ssam/* 6898105197Ssam * SADB_EXPIRE processing 6899105197Ssam * send 6900105197Ssam * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6901105197Ssam * to KMD by PF_KEY. 6902105197Ssam * NOTE: We send only soft lifetime extension. 6903105197Ssam * 6904105197Ssam * OUT: 0 : succeed 6905105197Ssam * others : error number 6906105197Ssam */ 6907105197Ssamstatic int 6908119643Ssamkey_expire(struct secasvar *sav) 6909105197Ssam{ 6910105197Ssam int s; 6911105197Ssam int satype; 6912105197Ssam struct mbuf *result = NULL, *m; 6913105197Ssam int len; 6914105197Ssam int error = -1; 6915105197Ssam struct sadb_lifetime *lt; 6916105197Ssam 6917105197Ssam /* XXX: Why do we lock ? */ 6918105197Ssam s = splnet(); /*called from softclock()*/ 6919105197Ssam 6920120585Ssam IPSEC_ASSERT (sav != NULL, ("null sav")); 6921120585Ssam IPSEC_ASSERT (sav->sah != NULL, ("null sa header")); 6922105197Ssam 6923105197Ssam /* set msg header */ 6924120585Ssam satype = key_proto2satype(sav->sah->saidx.proto); 6925120585Ssam IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype)); 6926105197Ssam m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6927105197Ssam if (!m) { 6928105197Ssam error = ENOBUFS; 6929105197Ssam goto fail; 6930105197Ssam } 6931105197Ssam result = m; 6932105197Ssam 6933105197Ssam /* create SA extension */ 6934105197Ssam m = key_setsadbsa(sav); 6935105197Ssam if (!m) { 6936105197Ssam error = ENOBUFS; 6937105197Ssam goto fail; 6938105197Ssam } 6939105197Ssam m_cat(result, m); 6940105197Ssam 6941105197Ssam /* create SA extension */ 6942105197Ssam m = key_setsadbxsa2(sav->sah->saidx.mode, 6943105197Ssam sav->replay ? sav->replay->count : 0, 6944105197Ssam sav->sah->saidx.reqid); 6945105197Ssam if (!m) { 6946105197Ssam error = ENOBUFS; 6947105197Ssam goto fail; 6948105197Ssam } 6949105197Ssam m_cat(result, m); 6950105197Ssam 6951105197Ssam /* create lifetime extension (current and soft) */ 6952105197Ssam len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6953105197Ssam m = key_alloc_mbuf(len); 6954105197Ssam if (!m || m->m_next) { /*XXX*/ 6955105197Ssam if (m) 6956105197Ssam m_freem(m); 6957105197Ssam error = ENOBUFS; 6958105197Ssam goto fail; 6959105197Ssam } 6960105197Ssam bzero(mtod(m, caddr_t), len); 6961105197Ssam lt = mtod(m, struct sadb_lifetime *); 6962105197Ssam lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6963105197Ssam lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6964157123Sgnn lt->sadb_lifetime_allocations = sav->lft_c->allocations; 6965157123Sgnn lt->sadb_lifetime_bytes = sav->lft_c->bytes; 6966157123Sgnn lt->sadb_lifetime_addtime = sav->lft_c->addtime; 6967157123Sgnn lt->sadb_lifetime_usetime = sav->lft_c->usetime; 6968105197Ssam lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2); 6969176743Sbz lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6970176743Sbz lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT; 6971176743Sbz lt->sadb_lifetime_allocations = sav->lft_s->allocations; 6972176743Sbz lt->sadb_lifetime_bytes = sav->lft_s->bytes; 6973176743Sbz lt->sadb_lifetime_addtime = sav->lft_s->addtime; 6974176743Sbz lt->sadb_lifetime_usetime = sav->lft_s->usetime; 6975105197Ssam m_cat(result, m); 6976105197Ssam 6977105197Ssam /* set sadb_address for source */ 6978105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 6979105197Ssam &sav->sah->saidx.src.sa, 6980105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6981105197Ssam if (!m) { 6982105197Ssam error = ENOBUFS; 6983105197Ssam goto fail; 6984105197Ssam } 6985105197Ssam m_cat(result, m); 6986105197Ssam 6987105197Ssam /* set sadb_address for destination */ 6988105197Ssam m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 6989105197Ssam &sav->sah->saidx.dst.sa, 6990105197Ssam FULLMASK, IPSEC_ULPROTO_ANY); 6991105197Ssam if (!m) { 6992105197Ssam error = ENOBUFS; 6993105197Ssam goto fail; 6994105197Ssam } 6995105197Ssam m_cat(result, m); 6996105197Ssam 6997194062Svanhu /* 6998194062Svanhu * XXX-BZ Handle NAT-T extensions here. 6999194062Svanhu */ 7000194062Svanhu 7001105197Ssam if ((result->m_flags & M_PKTHDR) == 0) { 7002105197Ssam error = EINVAL; 7003105197Ssam goto fail; 7004105197Ssam } 7005105197Ssam 7006105197Ssam if (result->m_len < sizeof(struct sadb_msg)) { 7007105197Ssam result = m_pullup(result, sizeof(struct sadb_msg)); 7008105197Ssam if (result == NULL) { 7009105197Ssam error = ENOBUFS; 7010105197Ssam goto fail; 7011105197Ssam } 7012105197Ssam } 7013105197Ssam 7014105197Ssam result->m_pkthdr.len = 0; 7015105197Ssam for (m = result; m; m = m->m_next) 7016105197Ssam result->m_pkthdr.len += m->m_len; 7017105197Ssam 7018105197Ssam mtod(result, struct sadb_msg *)->sadb_msg_len = 7019105197Ssam PFKEY_UNIT64(result->m_pkthdr.len); 7020105197Ssam 7021105197Ssam splx(s); 7022105197Ssam return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7023105197Ssam 7024105197Ssam fail: 7025105197Ssam if (result) 7026105197Ssam m_freem(result); 7027105197Ssam splx(s); 7028105197Ssam return error; 7029105197Ssam} 7030105197Ssam 7031105197Ssam/* 7032105197Ssam * SADB_FLUSH processing 7033105197Ssam * receive 7034105197Ssam * <base> 7035105197Ssam * from the ikmpd, and free all entries in secastree. 7036105197Ssam * and send, 7037105197Ssam * <base> 7038105197Ssam * to the ikmpd. 7039105197Ssam * NOTE: to do is only marking SADB_SASTATE_DEAD. 7040105197Ssam * 7041105197Ssam * m will always be freed. 7042105197Ssam */ 7043105197Ssamstatic int 7044105197Ssamkey_flush(so, m, mhp) 7045105197Ssam struct socket *so; 7046105197Ssam struct mbuf *m; 7047105197Ssam const struct sadb_msghdr *mhp; 7048105197Ssam{ 7049105197Ssam struct sadb_msg *newmsg; 7050105197Ssam struct secashead *sah, *nextsah; 7051105197Ssam struct secasvar *sav, *nextsav; 7052105197Ssam u_int16_t proto; 7053105197Ssam u_int8_t state; 7054105197Ssam u_int stateidx; 7055105197Ssam 7056120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7057120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7058120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7059105197Ssam 7060105197Ssam /* map satype to proto */ 7061105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7062120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7063120585Ssam __func__)); 7064105197Ssam return key_senderror(so, m, EINVAL); 7065105197Ssam } 7066105197Ssam 7067105197Ssam /* no SATYPE specified, i.e. flushing all SA. */ 7068120585Ssam SAHTREE_LOCK(); 7069181803Sbz for (sah = LIST_FIRST(&V_sahtree); 7070105197Ssam sah != NULL; 7071105197Ssam sah = nextsah) { 7072105197Ssam nextsah = LIST_NEXT(sah, chain); 7073105197Ssam 7074105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7075105197Ssam && proto != sah->saidx.proto) 7076105197Ssam continue; 7077105197Ssam 7078105197Ssam for (stateidx = 0; 7079185348Szec stateidx < _ARRAYLEN(saorder_state_alive); 7080105197Ssam stateidx++) { 7081185348Szec state = saorder_state_any[stateidx]; 7082105197Ssam for (sav = LIST_FIRST(&sah->savtree[state]); 7083105197Ssam sav != NULL; 7084105197Ssam sav = nextsav) { 7085105197Ssam 7086105197Ssam nextsav = LIST_NEXT(sav, chain); 7087105197Ssam 7088105197Ssam key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7089105197Ssam KEY_FREESAV(&sav); 7090105197Ssam } 7091105197Ssam } 7092105197Ssam 7093105197Ssam sah->state = SADB_SASTATE_DEAD; 7094105197Ssam } 7095120585Ssam SAHTREE_UNLOCK(); 7096105197Ssam 7097105197Ssam if (m->m_len < sizeof(struct sadb_msg) || 7098105197Ssam sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7099120585Ssam ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__)); 7100105197Ssam return key_senderror(so, m, ENOBUFS); 7101105197Ssam } 7102105197Ssam 7103105197Ssam if (m->m_next) 7104105197Ssam m_freem(m->m_next); 7105105197Ssam m->m_next = NULL; 7106105197Ssam m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7107105197Ssam newmsg = mtod(m, struct sadb_msg *); 7108105197Ssam newmsg->sadb_msg_errno = 0; 7109105197Ssam newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7110105197Ssam 7111105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7112105197Ssam} 7113105197Ssam 7114105197Ssam/* 7115105197Ssam * SADB_DUMP processing 7116105197Ssam * dump all entries including status of DEAD in SAD. 7117105197Ssam * receive 7118105197Ssam * <base> 7119105197Ssam * from the ikmpd, and dump all secasvar leaves 7120105197Ssam * and send, 7121105197Ssam * <base> ..... 7122105197Ssam * to the ikmpd. 7123105197Ssam * 7124105197Ssam * m will always be freed. 7125105197Ssam */ 7126105197Ssamstatic int 7127105197Ssamkey_dump(so, m, mhp) 7128105197Ssam struct socket *so; 7129105197Ssam struct mbuf *m; 7130105197Ssam const struct sadb_msghdr *mhp; 7131105197Ssam{ 7132105197Ssam struct secashead *sah; 7133105197Ssam struct secasvar *sav; 7134105197Ssam u_int16_t proto; 7135105197Ssam u_int stateidx; 7136105197Ssam u_int8_t satype; 7137105197Ssam u_int8_t state; 7138105197Ssam int cnt; 7139105197Ssam struct sadb_msg *newmsg; 7140105197Ssam struct mbuf *n; 7141105197Ssam 7142120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7143120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7144120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7145120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7146105197Ssam 7147105197Ssam /* map satype to proto */ 7148105197Ssam if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 7149120585Ssam ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n", 7150120585Ssam __func__)); 7151105197Ssam return key_senderror(so, m, EINVAL); 7152105197Ssam } 7153105197Ssam 7154105197Ssam /* count sav entries to be sent to the userland. */ 7155105197Ssam cnt = 0; 7156120585Ssam SAHTREE_LOCK(); 7157181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7158105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7159105197Ssam && proto != sah->saidx.proto) 7160105197Ssam continue; 7161105197Ssam 7162105197Ssam for (stateidx = 0; 7163185348Szec stateidx < _ARRAYLEN(saorder_state_any); 7164105197Ssam stateidx++) { 7165185348Szec state = saorder_state_any[stateidx]; 7166105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 7167105197Ssam cnt++; 7168105197Ssam } 7169105197Ssam } 7170105197Ssam } 7171105197Ssam 7172119643Ssam if (cnt == 0) { 7173120585Ssam SAHTREE_UNLOCK(); 7174105197Ssam return key_senderror(so, m, ENOENT); 7175119643Ssam } 7176105197Ssam 7177105197Ssam /* send this to the userland, one at a time. */ 7178105197Ssam newmsg = NULL; 7179181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7180105197Ssam if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC 7181105197Ssam && proto != sah->saidx.proto) 7182105197Ssam continue; 7183105197Ssam 7184105197Ssam /* map proto to satype */ 7185105197Ssam if ((satype = key_proto2satype(sah->saidx.proto)) == 0) { 7186120585Ssam SAHTREE_UNLOCK(); 7187120585Ssam ipseclog((LOG_DEBUG, "%s: there was invalid proto in " 7188120585Ssam "SAD.\n", __func__)); 7189105197Ssam return key_senderror(so, m, EINVAL); 7190105197Ssam } 7191105197Ssam 7192105197Ssam for (stateidx = 0; 7193185348Szec stateidx < _ARRAYLEN(saorder_state_any); 7194105197Ssam stateidx++) { 7195185348Szec state = saorder_state_any[stateidx]; 7196105197Ssam LIST_FOREACH(sav, &sah->savtree[state], chain) { 7197105197Ssam n = key_setdumpsa(sav, SADB_DUMP, satype, 7198105197Ssam --cnt, mhp->msg->sadb_msg_pid); 7199119643Ssam if (!n) { 7200120585Ssam SAHTREE_UNLOCK(); 7201105197Ssam return key_senderror(so, m, ENOBUFS); 7202119643Ssam } 7203105197Ssam key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 7204105197Ssam } 7205105197Ssam } 7206105197Ssam } 7207120585Ssam SAHTREE_UNLOCK(); 7208105197Ssam 7209105197Ssam m_freem(m); 7210105197Ssam return 0; 7211105197Ssam} 7212105197Ssam 7213105197Ssam/* 7214105197Ssam * SADB_X_PROMISC processing 7215105197Ssam * 7216105197Ssam * m will always be freed. 7217105197Ssam */ 7218105197Ssamstatic int 7219105197Ssamkey_promisc(so, m, mhp) 7220105197Ssam struct socket *so; 7221105197Ssam struct mbuf *m; 7222105197Ssam const struct sadb_msghdr *mhp; 7223105197Ssam{ 7224105197Ssam int olen; 7225105197Ssam 7226120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7227120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7228120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7229120585Ssam IPSEC_ASSERT(mhp->msg != NULL, ("null msg")); 7230105197Ssam 7231105197Ssam olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7232105197Ssam 7233105197Ssam if (olen < sizeof(struct sadb_msg)) { 7234105197Ssam#if 1 7235105197Ssam return key_senderror(so, m, EINVAL); 7236105197Ssam#else 7237105197Ssam m_freem(m); 7238105197Ssam return 0; 7239105197Ssam#endif 7240105197Ssam } else if (olen == sizeof(struct sadb_msg)) { 7241105197Ssam /* enable/disable promisc mode */ 7242105197Ssam struct keycb *kp; 7243105197Ssam 7244105197Ssam if ((kp = (struct keycb *)sotorawcb(so)) == NULL) 7245105197Ssam return key_senderror(so, m, EINVAL); 7246105197Ssam mhp->msg->sadb_msg_errno = 0; 7247105197Ssam switch (mhp->msg->sadb_msg_satype) { 7248105197Ssam case 0: 7249105197Ssam case 1: 7250105197Ssam kp->kp_promisc = mhp->msg->sadb_msg_satype; 7251105197Ssam break; 7252105197Ssam default: 7253105197Ssam return key_senderror(so, m, EINVAL); 7254105197Ssam } 7255105197Ssam 7256105197Ssam /* send the original message back to everyone */ 7257105197Ssam mhp->msg->sadb_msg_errno = 0; 7258105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7259105197Ssam } else { 7260105197Ssam /* send packet as is */ 7261105197Ssam 7262105197Ssam m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7263105197Ssam 7264105197Ssam /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7265105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7266105197Ssam } 7267105197Ssam} 7268105197Ssam 7269105197Ssamstatic int (*key_typesw[]) __P((struct socket *, struct mbuf *, 7270105197Ssam const struct sadb_msghdr *)) = { 7271105197Ssam NULL, /* SADB_RESERVED */ 7272105197Ssam key_getspi, /* SADB_GETSPI */ 7273105197Ssam key_update, /* SADB_UPDATE */ 7274105197Ssam key_add, /* SADB_ADD */ 7275105197Ssam key_delete, /* SADB_DELETE */ 7276105197Ssam key_get, /* SADB_GET */ 7277105197Ssam key_acquire2, /* SADB_ACQUIRE */ 7278105197Ssam key_register, /* SADB_REGISTER */ 7279105197Ssam NULL, /* SADB_EXPIRE */ 7280105197Ssam key_flush, /* SADB_FLUSH */ 7281105197Ssam key_dump, /* SADB_DUMP */ 7282105197Ssam key_promisc, /* SADB_X_PROMISC */ 7283105197Ssam NULL, /* SADB_X_PCHANGE */ 7284105197Ssam key_spdadd, /* SADB_X_SPDUPDATE */ 7285105197Ssam key_spdadd, /* SADB_X_SPDADD */ 7286105197Ssam key_spddelete, /* SADB_X_SPDDELETE */ 7287105197Ssam key_spdget, /* SADB_X_SPDGET */ 7288105197Ssam NULL, /* SADB_X_SPDACQUIRE */ 7289105197Ssam key_spddump, /* SADB_X_SPDDUMP */ 7290105197Ssam key_spdflush, /* SADB_X_SPDFLUSH */ 7291105197Ssam key_spdadd, /* SADB_X_SPDSETIDX */ 7292105197Ssam NULL, /* SADB_X_SPDEXPIRE */ 7293105197Ssam key_spddelete2, /* SADB_X_SPDDELETE2 */ 7294105197Ssam}; 7295105197Ssam 7296105197Ssam/* 7297105197Ssam * parse sadb_msg buffer to process PFKEYv2, 7298105197Ssam * and create a data to response if needed. 7299105197Ssam * I think to be dealed with mbuf directly. 7300105197Ssam * IN: 7301105197Ssam * msgp : pointer to pointer to a received buffer pulluped. 7302105197Ssam * This is rewrited to response. 7303105197Ssam * so : pointer to socket. 7304105197Ssam * OUT: 7305105197Ssam * length for buffer to send to user process. 7306105197Ssam */ 7307105197Ssamint 7308105197Ssamkey_parse(m, so) 7309105197Ssam struct mbuf *m; 7310105197Ssam struct socket *so; 7311105197Ssam{ 7312105197Ssam struct sadb_msg *msg; 7313105197Ssam struct sadb_msghdr mh; 7314105197Ssam u_int orglen; 7315105197Ssam int error; 7316105197Ssam int target; 7317105197Ssam 7318120585Ssam IPSEC_ASSERT(so != NULL, ("null socket")); 7319120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7320105197Ssam 7321105197Ssam#if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7322105197Ssam KEYDEBUG(KEYDEBUG_KEY_DUMP, 7323120585Ssam ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__)); 7324105197Ssam kdebug_sadb(msg)); 7325105197Ssam#endif 7326105197Ssam 7327105197Ssam if (m->m_len < sizeof(struct sadb_msg)) { 7328105197Ssam m = m_pullup(m, sizeof(struct sadb_msg)); 7329105197Ssam if (!m) 7330105197Ssam return ENOBUFS; 7331105197Ssam } 7332105197Ssam msg = mtod(m, struct sadb_msg *); 7333105197Ssam orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7334105197Ssam target = KEY_SENDUP_ONE; 7335105197Ssam 7336105197Ssam if ((m->m_flags & M_PKTHDR) == 0 || 7337105197Ssam m->m_pkthdr.len != m->m_pkthdr.len) { 7338120585Ssam ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__)); 7339181803Sbz V_pfkeystat.out_invlen++; 7340105197Ssam error = EINVAL; 7341105197Ssam goto senderror; 7342105197Ssam } 7343105197Ssam 7344105197Ssam if (msg->sadb_msg_version != PF_KEY_V2) { 7345120585Ssam ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n", 7346120585Ssam __func__, msg->sadb_msg_version)); 7347181803Sbz V_pfkeystat.out_invver++; 7348105197Ssam error = EINVAL; 7349105197Ssam goto senderror; 7350105197Ssam } 7351105197Ssam 7352105197Ssam if (msg->sadb_msg_type > SADB_MAX) { 7353120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7354120585Ssam __func__, msg->sadb_msg_type)); 7355181803Sbz V_pfkeystat.out_invmsgtype++; 7356105197Ssam error = EINVAL; 7357105197Ssam goto senderror; 7358105197Ssam } 7359105197Ssam 7360105197Ssam /* for old-fashioned code - should be nuked */ 7361105197Ssam if (m->m_pkthdr.len > MCLBYTES) { 7362105197Ssam m_freem(m); 7363105197Ssam return ENOBUFS; 7364105197Ssam } 7365105197Ssam if (m->m_next) { 7366105197Ssam struct mbuf *n; 7367105197Ssam 7368111119Simp MGETHDR(n, M_DONTWAIT, MT_DATA); 7369105197Ssam if (n && m->m_pkthdr.len > MHLEN) { 7370111119Simp MCLGET(n, M_DONTWAIT); 7371105197Ssam if ((n->m_flags & M_EXT) == 0) { 7372105197Ssam m_free(n); 7373105197Ssam n = NULL; 7374105197Ssam } 7375105197Ssam } 7376105197Ssam if (!n) { 7377105197Ssam m_freem(m); 7378105197Ssam return ENOBUFS; 7379105197Ssam } 7380105197Ssam m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t)); 7381105197Ssam n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7382105197Ssam n->m_next = NULL; 7383105197Ssam m_freem(m); 7384105197Ssam m = n; 7385105197Ssam } 7386105197Ssam 7387105197Ssam /* align the mbuf chain so that extensions are in contiguous region. */ 7388105197Ssam error = key_align(m, &mh); 7389105197Ssam if (error) 7390105197Ssam return error; 7391105197Ssam 7392105197Ssam msg = mh.msg; 7393105197Ssam 7394105197Ssam /* check SA type */ 7395105197Ssam switch (msg->sadb_msg_satype) { 7396105197Ssam case SADB_SATYPE_UNSPEC: 7397105197Ssam switch (msg->sadb_msg_type) { 7398105197Ssam case SADB_GETSPI: 7399105197Ssam case SADB_UPDATE: 7400105197Ssam case SADB_ADD: 7401105197Ssam case SADB_DELETE: 7402105197Ssam case SADB_GET: 7403105197Ssam case SADB_ACQUIRE: 7404105197Ssam case SADB_EXPIRE: 7405120585Ssam ipseclog((LOG_DEBUG, "%s: must specify satype " 7406120585Ssam "when msg type=%u.\n", __func__, 7407120585Ssam msg->sadb_msg_type)); 7408181803Sbz V_pfkeystat.out_invsatype++; 7409105197Ssam error = EINVAL; 7410105197Ssam goto senderror; 7411105197Ssam } 7412105197Ssam break; 7413105197Ssam case SADB_SATYPE_AH: 7414105197Ssam case SADB_SATYPE_ESP: 7415105197Ssam case SADB_X_SATYPE_IPCOMP: 7416125680Sbms case SADB_X_SATYPE_TCPSIGNATURE: 7417105197Ssam switch (msg->sadb_msg_type) { 7418105197Ssam case SADB_X_SPDADD: 7419105197Ssam case SADB_X_SPDDELETE: 7420105197Ssam case SADB_X_SPDGET: 7421105197Ssam case SADB_X_SPDDUMP: 7422105197Ssam case SADB_X_SPDFLUSH: 7423105197Ssam case SADB_X_SPDSETIDX: 7424105197Ssam case SADB_X_SPDUPDATE: 7425105197Ssam case SADB_X_SPDDELETE2: 7426120585Ssam ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n", 7427120585Ssam __func__, msg->sadb_msg_type)); 7428181803Sbz V_pfkeystat.out_invsatype++; 7429105197Ssam error = EINVAL; 7430105197Ssam goto senderror; 7431105197Ssam } 7432105197Ssam break; 7433105197Ssam case SADB_SATYPE_RSVP: 7434105197Ssam case SADB_SATYPE_OSPFV2: 7435105197Ssam case SADB_SATYPE_RIPV2: 7436105197Ssam case SADB_SATYPE_MIP: 7437120585Ssam ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n", 7438120585Ssam __func__, msg->sadb_msg_satype)); 7439181803Sbz V_pfkeystat.out_invsatype++; 7440105197Ssam error = EOPNOTSUPP; 7441105197Ssam goto senderror; 7442105197Ssam case 1: /* XXX: What does it do? */ 7443105197Ssam if (msg->sadb_msg_type == SADB_X_PROMISC) 7444105197Ssam break; 7445105197Ssam /*FALLTHROUGH*/ 7446105197Ssam default: 7447120585Ssam ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n", 7448120585Ssam __func__, msg->sadb_msg_satype)); 7449181803Sbz V_pfkeystat.out_invsatype++; 7450105197Ssam error = EINVAL; 7451105197Ssam goto senderror; 7452105197Ssam } 7453105197Ssam 7454105197Ssam /* check field of upper layer protocol and address family */ 7455105197Ssam if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL 7456105197Ssam && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7457105197Ssam struct sadb_address *src0, *dst0; 7458105197Ssam u_int plen; 7459105197Ssam 7460105197Ssam src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7461105197Ssam dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7462105197Ssam 7463105197Ssam /* check upper layer protocol */ 7464105197Ssam if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7465120585Ssam ipseclog((LOG_DEBUG, "%s: upper layer protocol " 7466120585Ssam "mismatched.\n", __func__)); 7467181803Sbz V_pfkeystat.out_invaddr++; 7468105197Ssam error = EINVAL; 7469105197Ssam goto senderror; 7470105197Ssam } 7471105197Ssam 7472105197Ssam /* check family */ 7473105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_family != 7474105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_family) { 7475120585Ssam ipseclog((LOG_DEBUG, "%s: address family mismatched.\n", 7476120585Ssam __func__)); 7477181803Sbz V_pfkeystat.out_invaddr++; 7478105197Ssam error = EINVAL; 7479105197Ssam goto senderror; 7480105197Ssam } 7481105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 7482105197Ssam PFKEY_ADDR_SADDR(dst0)->sa_len) { 7483120585Ssam ipseclog((LOG_DEBUG, "%s: address struct size " 7484120585Ssam "mismatched.\n", __func__)); 7485181803Sbz V_pfkeystat.out_invaddr++; 7486105197Ssam error = EINVAL; 7487105197Ssam goto senderror; 7488105197Ssam } 7489105197Ssam 7490105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7491105197Ssam case AF_INET: 7492105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 7493105197Ssam sizeof(struct sockaddr_in)) { 7494181803Sbz V_pfkeystat.out_invaddr++; 7495105197Ssam error = EINVAL; 7496105197Ssam goto senderror; 7497105197Ssam } 7498105197Ssam break; 7499105197Ssam case AF_INET6: 7500105197Ssam if (PFKEY_ADDR_SADDR(src0)->sa_len != 7501105197Ssam sizeof(struct sockaddr_in6)) { 7502181803Sbz V_pfkeystat.out_invaddr++; 7503105197Ssam error = EINVAL; 7504105197Ssam goto senderror; 7505105197Ssam } 7506105197Ssam break; 7507105197Ssam default: 7508120585Ssam ipseclog((LOG_DEBUG, "%s: unsupported address family\n", 7509120585Ssam __func__)); 7510181803Sbz V_pfkeystat.out_invaddr++; 7511105197Ssam error = EAFNOSUPPORT; 7512105197Ssam goto senderror; 7513105197Ssam } 7514105197Ssam 7515105197Ssam switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7516105197Ssam case AF_INET: 7517105197Ssam plen = sizeof(struct in_addr) << 3; 7518105197Ssam break; 7519105197Ssam case AF_INET6: 7520105197Ssam plen = sizeof(struct in6_addr) << 3; 7521105197Ssam break; 7522105197Ssam default: 7523105197Ssam plen = 0; /*fool gcc*/ 7524105197Ssam break; 7525105197Ssam } 7526105197Ssam 7527105197Ssam /* check max prefix length */ 7528105197Ssam if (src0->sadb_address_prefixlen > plen || 7529105197Ssam dst0->sadb_address_prefixlen > plen) { 7530120585Ssam ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n", 7531120585Ssam __func__)); 7532181803Sbz V_pfkeystat.out_invaddr++; 7533105197Ssam error = EINVAL; 7534105197Ssam goto senderror; 7535105197Ssam } 7536105197Ssam 7537105197Ssam /* 7538105197Ssam * prefixlen == 0 is valid because there can be a case when 7539105197Ssam * all addresses are matched. 7540105197Ssam */ 7541105197Ssam } 7542105197Ssam 7543105197Ssam if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) || 7544105197Ssam key_typesw[msg->sadb_msg_type] == NULL) { 7545181803Sbz V_pfkeystat.out_invmsgtype++; 7546105197Ssam error = EINVAL; 7547105197Ssam goto senderror; 7548105197Ssam } 7549105197Ssam 7550105197Ssam return (*key_typesw[msg->sadb_msg_type])(so, m, &mh); 7551105197Ssam 7552105197Ssamsenderror: 7553105197Ssam msg->sadb_msg_errno = error; 7554105197Ssam return key_sendup_mbuf(so, m, target); 7555105197Ssam} 7556105197Ssam 7557105197Ssamstatic int 7558105197Ssamkey_senderror(so, m, code) 7559105197Ssam struct socket *so; 7560105197Ssam struct mbuf *m; 7561105197Ssam int code; 7562105197Ssam{ 7563105197Ssam struct sadb_msg *msg; 7564105197Ssam 7565120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7566120585Ssam ("mbuf too small, len %u", m->m_len)); 7567105197Ssam 7568105197Ssam msg = mtod(m, struct sadb_msg *); 7569105197Ssam msg->sadb_msg_errno = code; 7570105197Ssam return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7571105197Ssam} 7572105197Ssam 7573105197Ssam/* 7574105197Ssam * set the pointer to each header into message buffer. 7575105197Ssam * m will be freed on error. 7576105197Ssam * XXX larger-than-MCLBYTES extension? 7577105197Ssam */ 7578105197Ssamstatic int 7579105197Ssamkey_align(m, mhp) 7580105197Ssam struct mbuf *m; 7581105197Ssam struct sadb_msghdr *mhp; 7582105197Ssam{ 7583105197Ssam struct mbuf *n; 7584105197Ssam struct sadb_ext *ext; 7585105197Ssam size_t off, end; 7586105197Ssam int extlen; 7587105197Ssam int toff; 7588105197Ssam 7589120585Ssam IPSEC_ASSERT(m != NULL, ("null mbuf")); 7590120585Ssam IPSEC_ASSERT(mhp != NULL, ("null msghdr")); 7591120585Ssam IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg), 7592120585Ssam ("mbuf too small, len %u", m->m_len)); 7593105197Ssam 7594105197Ssam /* initialize */ 7595105197Ssam bzero(mhp, sizeof(*mhp)); 7596105197Ssam 7597105197Ssam mhp->msg = mtod(m, struct sadb_msg *); 7598105197Ssam mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7599105197Ssam 7600105197Ssam end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7601105197Ssam extlen = end; /*just in case extlen is not updated*/ 7602105197Ssam for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7603105197Ssam n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7604105197Ssam if (!n) { 7605105197Ssam /* m is already freed */ 7606105197Ssam return ENOBUFS; 7607105197Ssam } 7608105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7609105197Ssam 7610105197Ssam /* set pointer */ 7611105197Ssam switch (ext->sadb_ext_type) { 7612105197Ssam case SADB_EXT_SA: 7613105197Ssam case SADB_EXT_ADDRESS_SRC: 7614105197Ssam case SADB_EXT_ADDRESS_DST: 7615105197Ssam case SADB_EXT_ADDRESS_PROXY: 7616105197Ssam case SADB_EXT_LIFETIME_CURRENT: 7617105197Ssam case SADB_EXT_LIFETIME_HARD: 7618105197Ssam case SADB_EXT_LIFETIME_SOFT: 7619105197Ssam case SADB_EXT_KEY_AUTH: 7620105197Ssam case SADB_EXT_KEY_ENCRYPT: 7621105197Ssam case SADB_EXT_IDENTITY_SRC: 7622105197Ssam case SADB_EXT_IDENTITY_DST: 7623105197Ssam case SADB_EXT_SENSITIVITY: 7624105197Ssam case SADB_EXT_PROPOSAL: 7625105197Ssam case SADB_EXT_SUPPORTED_AUTH: 7626105197Ssam case SADB_EXT_SUPPORTED_ENCRYPT: 7627105197Ssam case SADB_EXT_SPIRANGE: 7628105197Ssam case SADB_X_EXT_POLICY: 7629105197Ssam case SADB_X_EXT_SA2: 7630194062Svanhu#ifdef IPSEC_NAT_T 7631194062Svanhu case SADB_X_EXT_NAT_T_TYPE: 7632194062Svanhu case SADB_X_EXT_NAT_T_SPORT: 7633194062Svanhu case SADB_X_EXT_NAT_T_DPORT: 7634194062Svanhu case SADB_X_EXT_NAT_T_OAI: 7635194062Svanhu case SADB_X_EXT_NAT_T_OAR: 7636194062Svanhu case SADB_X_EXT_NAT_T_FRAG: 7637194062Svanhu#endif 7638105197Ssam /* duplicate check */ 7639105197Ssam /* 7640105197Ssam * XXX Are there duplication payloads of either 7641105197Ssam * KEY_AUTH or KEY_ENCRYPT ? 7642105197Ssam */ 7643105197Ssam if (mhp->ext[ext->sadb_ext_type] != NULL) { 7644120585Ssam ipseclog((LOG_DEBUG, "%s: duplicate ext_type " 7645120585Ssam "%u\n", __func__, ext->sadb_ext_type)); 7646105197Ssam m_freem(m); 7647181803Sbz V_pfkeystat.out_dupext++; 7648105197Ssam return EINVAL; 7649105197Ssam } 7650105197Ssam break; 7651105197Ssam default: 7652120585Ssam ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n", 7653120585Ssam __func__, ext->sadb_ext_type)); 7654105197Ssam m_freem(m); 7655181803Sbz V_pfkeystat.out_invexttype++; 7656105197Ssam return EINVAL; 7657105197Ssam } 7658105197Ssam 7659105197Ssam extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7660105197Ssam 7661105197Ssam if (key_validate_ext(ext, extlen)) { 7662105197Ssam m_freem(m); 7663181803Sbz V_pfkeystat.out_invlen++; 7664105197Ssam return EINVAL; 7665105197Ssam } 7666105197Ssam 7667105197Ssam n = m_pulldown(m, off, extlen, &toff); 7668105197Ssam if (!n) { 7669105197Ssam /* m is already freed */ 7670105197Ssam return ENOBUFS; 7671105197Ssam } 7672105197Ssam ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff); 7673105197Ssam 7674105197Ssam mhp->ext[ext->sadb_ext_type] = ext; 7675105197Ssam mhp->extoff[ext->sadb_ext_type] = off; 7676105197Ssam mhp->extlen[ext->sadb_ext_type] = extlen; 7677105197Ssam } 7678105197Ssam 7679105197Ssam if (off != end) { 7680105197Ssam m_freem(m); 7681181803Sbz V_pfkeystat.out_invlen++; 7682105197Ssam return EINVAL; 7683105197Ssam } 7684105197Ssam 7685105197Ssam return 0; 7686105197Ssam} 7687105197Ssam 7688105197Ssamstatic int 7689105197Ssamkey_validate_ext(ext, len) 7690105197Ssam const struct sadb_ext *ext; 7691105197Ssam int len; 7692105197Ssam{ 7693105197Ssam const struct sockaddr *sa; 7694105197Ssam enum { NONE, ADDR } checktype = NONE; 7695105197Ssam int baselen = 0; 7696105197Ssam const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7697105197Ssam 7698105197Ssam if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7699105197Ssam return EINVAL; 7700105197Ssam 7701105197Ssam /* if it does not match minimum/maximum length, bail */ 7702105197Ssam if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) || 7703105197Ssam ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0])) 7704105197Ssam return EINVAL; 7705105197Ssam if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7706105197Ssam return EINVAL; 7707105197Ssam if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7708105197Ssam return EINVAL; 7709105197Ssam 7710105197Ssam /* more checks based on sadb_ext_type XXX need more */ 7711105197Ssam switch (ext->sadb_ext_type) { 7712105197Ssam case SADB_EXT_ADDRESS_SRC: 7713105197Ssam case SADB_EXT_ADDRESS_DST: 7714105197Ssam case SADB_EXT_ADDRESS_PROXY: 7715105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7716105197Ssam checktype = ADDR; 7717105197Ssam break; 7718105197Ssam case SADB_EXT_IDENTITY_SRC: 7719105197Ssam case SADB_EXT_IDENTITY_DST: 7720105197Ssam if (((const struct sadb_ident *)ext)->sadb_ident_type == 7721105197Ssam SADB_X_IDENTTYPE_ADDR) { 7722105197Ssam baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7723105197Ssam checktype = ADDR; 7724105197Ssam } else 7725105197Ssam checktype = NONE; 7726105197Ssam break; 7727105197Ssam default: 7728105197Ssam checktype = NONE; 7729105197Ssam break; 7730105197Ssam } 7731105197Ssam 7732105197Ssam switch (checktype) { 7733105197Ssam case NONE: 7734105197Ssam break; 7735105197Ssam case ADDR: 7736105197Ssam sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7737105197Ssam if (len < baselen + sal) 7738105197Ssam return EINVAL; 7739105197Ssam if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7740105197Ssam return EINVAL; 7741105197Ssam break; 7742105197Ssam } 7743105197Ssam 7744105197Ssam return 0; 7745105197Ssam} 7746105197Ssam 7747105197Ssamvoid 7748180086Sjuliankey_init(void) 7749105197Ssam{ 7750105197Ssam int i; 7751105197Ssam 7752119643Ssam for (i = 0; i < IPSEC_DIR_MAX; i++) 7753181803Sbz LIST_INIT(&V_sptree[i]); 7754105197Ssam 7755181803Sbz LIST_INIT(&V_sahtree); 7756105197Ssam 7757119643Ssam for (i = 0; i <= SADB_SATYPE_MAX; i++) 7758181803Sbz LIST_INIT(&V_regtree[i]); 7759105197Ssam 7760181803Sbz LIST_INIT(&V_acqtree); 7761181803Sbz LIST_INIT(&V_spacqtree); 7762105197Ssam 7763105197Ssam /* system default */ 7764181803Sbz V_ip4_def_policy.policy = IPSEC_POLICY_NONE; 7765181803Sbz V_ip4_def_policy.refcnt++; /*never reclaim this*/ 7766105197Ssam 7767190787Szec if (!IS_DEFAULT_VNET(curvnet)) 7768190787Szec return; 7769190787Szec 7770190787Szec SPTREE_LOCK_INIT(); 7771190787Szec REGTREE_LOCK_INIT(); 7772190787Szec SAHTREE_LOCK_INIT(); 7773190787Szec ACQ_LOCK_INIT(); 7774190787Szec SPACQ_LOCK_INIT(); 7775190787Szec 7776105197Ssam#ifndef IPSEC_DEBUG2 7777105197Ssam timeout((void *)key_timehandler, (void *)0, hz); 7778105197Ssam#endif /*IPSEC_DEBUG2*/ 7779105197Ssam 7780105197Ssam /* initialize key statistics */ 7781105197Ssam keystat.getspi_count = 1; 7782105197Ssam 7783177173Sbz printf("IPsec: Initialized Security Association Processing.\n"); 7784193731Szec} 7785105197Ssam 7786193731Szec#ifdef VIMAGE 7787193731Szecvoid 7788193731Szeckey_destroy(void) 7789193731Szec{ 7790193731Szec struct secpolicy *sp, *nextsp; 7791193731Szec struct secspacq *acq, *nextacq; 7792193731Szec struct secashead *sah, *nextsah; 7793193731Szec struct secreg *reg; 7794193731Szec int i; 7795193731Szec 7796193731Szec SPTREE_LOCK(); 7797193731Szec for (i = 0; i < IPSEC_DIR_MAX; i++) { 7798193731Szec for (sp = LIST_FIRST(&V_sptree[i]); 7799193731Szec sp != NULL; sp = nextsp) { 7800193731Szec nextsp = LIST_NEXT(sp, chain); 7801193731Szec if (__LIST_CHAINED(sp)) { 7802193731Szec LIST_REMOVE(sp, chain); 7803193731Szec free(sp, M_IPSEC_SP); 7804193731Szec } 7805193731Szec } 7806193731Szec } 7807193731Szec SPTREE_UNLOCK(); 7808193731Szec 7809193731Szec SAHTREE_LOCK(); 7810193731Szec for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) { 7811193731Szec nextsah = LIST_NEXT(sah, chain); 7812193731Szec if (__LIST_CHAINED(sah)) { 7813193731Szec LIST_REMOVE(sah, chain); 7814193731Szec free(sah, M_IPSEC_SAH); 7815193731Szec } 7816193731Szec } 7817193731Szec SAHTREE_UNLOCK(); 7818193731Szec 7819193731Szec REGTREE_LOCK(); 7820193731Szec for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7821193731Szec LIST_FOREACH(reg, &V_regtree[i], chain) { 7822193731Szec if (__LIST_CHAINED(reg)) { 7823193731Szec LIST_REMOVE(reg, chain); 7824193731Szec free(reg, M_IPSEC_SAR); 7825193731Szec break; 7826193731Szec } 7827193731Szec } 7828193731Szec } 7829193731Szec REGTREE_UNLOCK(); 7830193731Szec 7831193731Szec ACQ_LOCK(); 7832193731Szec for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 7833193731Szec nextacq = LIST_NEXT(acq, chain); 7834193731Szec if (__LIST_CHAINED(acq)) { 7835193731Szec LIST_REMOVE(acq, chain); 7836193731Szec free(acq, M_IPSEC_SAQ); 7837193731Szec } 7838193731Szec } 7839193731Szec ACQ_UNLOCK(); 7840193731Szec 7841193731Szec SPACQ_LOCK(); 7842193731Szec for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) { 7843193731Szec nextacq = LIST_NEXT(acq, chain); 7844193731Szec if (__LIST_CHAINED(acq)) { 7845193731Szec LIST_REMOVE(acq, chain); 7846193731Szec free(acq, M_IPSEC_SAQ); 7847193731Szec } 7848193731Szec } 7849193731Szec SPACQ_UNLOCK(); 7850105197Ssam} 7851193731Szec#endif 7852105197Ssam 7853105197Ssam/* 7854105197Ssam * XXX: maybe This function is called after INBOUND IPsec processing. 7855105197Ssam * 7856105197Ssam * Special check for tunnel-mode packets. 7857105197Ssam * We must make some checks for consistency between inner and outer IP header. 7858105197Ssam * 7859105197Ssam * xxx more checks to be provided 7860105197Ssam */ 7861105197Ssamint 7862105197Ssamkey_checktunnelsanity(sav, family, src, dst) 7863105197Ssam struct secasvar *sav; 7864105197Ssam u_int family; 7865105197Ssam caddr_t src; 7866105197Ssam caddr_t dst; 7867105197Ssam{ 7868120585Ssam IPSEC_ASSERT(sav->sah != NULL, ("null SA header")); 7869105197Ssam 7870105197Ssam /* XXX: check inner IP header */ 7871105197Ssam 7872105197Ssam return 1; 7873105197Ssam} 7874105197Ssam 7875105197Ssam/* record data transfer on SA, and update timestamps */ 7876105197Ssamvoid 7877105197Ssamkey_sa_recordxfer(sav, m) 7878105197Ssam struct secasvar *sav; 7879105197Ssam struct mbuf *m; 7880105197Ssam{ 7881120585Ssam IPSEC_ASSERT(sav != NULL, ("Null secasvar")); 7882120585Ssam IPSEC_ASSERT(m != NULL, ("Null mbuf")); 7883105197Ssam if (!sav->lft_c) 7884105197Ssam return; 7885105197Ssam 7886105197Ssam /* 7887105197Ssam * XXX Currently, there is a difference of bytes size 7888105197Ssam * between inbound and outbound processing. 7889105197Ssam */ 7890157123Sgnn sav->lft_c->bytes += m->m_pkthdr.len; 7891105197Ssam /* to check bytes lifetime is done in key_timehandler(). */ 7892105197Ssam 7893105197Ssam /* 7894105197Ssam * We use the number of packets as the unit of 7895157123Sgnn * allocations. We increment the variable 7896105197Ssam * whenever {esp,ah}_{in,out}put is called. 7897105197Ssam */ 7898157123Sgnn sav->lft_c->allocations++; 7899105197Ssam /* XXX check for expires? */ 7900105197Ssam 7901105197Ssam /* 7902157123Sgnn * NOTE: We record CURRENT usetime by using wall clock, 7903105197Ssam * in seconds. HARD and SOFT lifetime are measured by the time 7904157123Sgnn * difference (again in seconds) from usetime. 7905105197Ssam * 7906105197Ssam * usetime 7907105197Ssam * v expire expire 7908105197Ssam * -----+-----+--------+---> t 7909105197Ssam * <--------------> HARD 7910105197Ssam * <-----> SOFT 7911105197Ssam */ 7912157123Sgnn sav->lft_c->usetime = time_second; 7913105197Ssam /* XXX check for expires? */ 7914105197Ssam 7915105197Ssam return; 7916105197Ssam} 7917105197Ssam 7918105197Ssam/* dumb version */ 7919105197Ssamvoid 7920105197Ssamkey_sa_routechange(dst) 7921105197Ssam struct sockaddr *dst; 7922105197Ssam{ 7923105197Ssam struct secashead *sah; 7924105197Ssam struct route *ro; 7925105197Ssam 7926120585Ssam SAHTREE_LOCK(); 7927181803Sbz LIST_FOREACH(sah, &V_sahtree, chain) { 7928105197Ssam ro = &sah->sa_route; 7929105197Ssam if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len 7930105197Ssam && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) { 7931105197Ssam RTFREE(ro->ro_rt); 7932105197Ssam ro->ro_rt = (struct rtentry *)NULL; 7933105197Ssam } 7934105197Ssam } 7935120585Ssam SAHTREE_UNLOCK(); 7936105197Ssam} 7937105197Ssam 7938105197Ssamstatic void 7939189004Srdivackykey_sa_chgstate(struct secasvar *sav, u_int8_t state) 7940105197Ssam{ 7941120585Ssam IPSEC_ASSERT(sav != NULL, ("NULL sav")); 7942120585Ssam SAHTREE_LOCK_ASSERT(); 7943105197Ssam 7944119643Ssam if (sav->state != state) { 7945119643Ssam if (__LIST_CHAINED(sav)) 7946119643Ssam LIST_REMOVE(sav, chain); 7947119643Ssam sav->state = state; 7948119643Ssam LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain); 7949119643Ssam } 7950105197Ssam} 7951105197Ssam 7952105197Ssamvoid 7953105197Ssamkey_sa_stir_iv(sav) 7954105197Ssam struct secasvar *sav; 7955105197Ssam{ 7956105197Ssam 7957120585Ssam IPSEC_ASSERT(sav->iv != NULL, ("null IV")); 7958105197Ssam key_randomfill(sav->iv, sav->ivlen); 7959105197Ssam} 7960105197Ssam 7961105197Ssam/* XXX too much? */ 7962105197Ssamstatic struct mbuf * 7963105197Ssamkey_alloc_mbuf(l) 7964105197Ssam int l; 7965105197Ssam{ 7966105197Ssam struct mbuf *m = NULL, *n; 7967105197Ssam int len, t; 7968105197Ssam 7969105197Ssam len = l; 7970105197Ssam while (len > 0) { 7971111119Simp MGET(n, M_DONTWAIT, MT_DATA); 7972105197Ssam if (n && len > MLEN) 7973111119Simp MCLGET(n, M_DONTWAIT); 7974105197Ssam if (!n) { 7975105197Ssam m_freem(m); 7976105197Ssam return NULL; 7977105197Ssam } 7978105197Ssam 7979105197Ssam n->m_next = NULL; 7980105197Ssam n->m_len = 0; 7981105197Ssam n->m_len = M_TRAILINGSPACE(n); 7982105197Ssam /* use the bottom of mbuf, hoping we can prepend afterwards */ 7983105197Ssam if (n->m_len > len) { 7984105197Ssam t = (n->m_len - len) & ~(sizeof(long) - 1); 7985105197Ssam n->m_data += t; 7986105197Ssam n->m_len = len; 7987105197Ssam } 7988105197Ssam 7989105197Ssam len -= n->m_len; 7990105197Ssam 7991105197Ssam if (m) 7992105197Ssam m_cat(m, n); 7993105197Ssam else 7994105197Ssam m = n; 7995105197Ssam } 7996105197Ssam 7997105197Ssam return m; 7998105197Ssam} 7999157123Sgnn 8000157123Sgnn/* 8001157123Sgnn * Take one of the kernel's security keys and convert it into a PF_KEY 8002157123Sgnn * structure within an mbuf, suitable for sending up to a waiting 8003157123Sgnn * application in user land. 8004157123Sgnn * 8005157123Sgnn * IN: 8006157123Sgnn * src: A pointer to a kernel security key. 8007157123Sgnn * exttype: Which type of key this is. Refer to the PF_KEY data structures. 8008157123Sgnn * OUT: 8009157123Sgnn * a valid mbuf or NULL indicating an error 8010157123Sgnn * 8011157123Sgnn */ 8012157123Sgnn 8013157123Sgnnstatic struct mbuf * 8014157123Sgnnkey_setkey(struct seckey *src, u_int16_t exttype) 8015157123Sgnn{ 8016157123Sgnn struct mbuf *m; 8017157123Sgnn struct sadb_key *p; 8018170799Sbz int len; 8019157123Sgnn 8020157123Sgnn if (src == NULL) 8021157123Sgnn return NULL; 8022157123Sgnn 8023170799Sbz len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src)); 8024157123Sgnn m = key_alloc_mbuf(len); 8025157123Sgnn if (m == NULL) 8026157123Sgnn return NULL; 8027157123Sgnn p = mtod(m, struct sadb_key *); 8028157123Sgnn bzero(p, len); 8029157123Sgnn p->sadb_key_len = PFKEY_UNIT64(len); 8030157123Sgnn p->sadb_key_exttype = exttype; 8031157123Sgnn p->sadb_key_bits = src->bits; 8032157123Sgnn bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src)); 8033157123Sgnn 8034157123Sgnn return m; 8035157123Sgnn} 8036157123Sgnn 8037157123Sgnn/* 8038157123Sgnn * Take one of the kernel's lifetime data structures and convert it 8039157123Sgnn * into a PF_KEY structure within an mbuf, suitable for sending up to 8040157123Sgnn * a waiting application in user land. 8041157123Sgnn * 8042157123Sgnn * IN: 8043157123Sgnn * src: A pointer to a kernel lifetime structure. 8044157123Sgnn * exttype: Which type of lifetime this is. Refer to the PF_KEY 8045157123Sgnn * data structures for more information. 8046157123Sgnn * OUT: 8047157123Sgnn * a valid mbuf or NULL indicating an error 8048157123Sgnn * 8049157123Sgnn */ 8050157123Sgnn 8051157123Sgnnstatic struct mbuf * 8052157123Sgnnkey_setlifetime(struct seclifetime *src, u_int16_t exttype) 8053157123Sgnn{ 8054157123Sgnn struct mbuf *m = NULL; 8055157123Sgnn struct sadb_lifetime *p; 8056157123Sgnn int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime)); 8057157123Sgnn 8058157123Sgnn if (src == NULL) 8059157123Sgnn return NULL; 8060157123Sgnn 8061157123Sgnn m = key_alloc_mbuf(len); 8062157123Sgnn if (m == NULL) 8063157123Sgnn return m; 8064157123Sgnn p = mtod(m, struct sadb_lifetime *); 8065157123Sgnn 8066157123Sgnn bzero(p, len); 8067157123Sgnn p->sadb_lifetime_len = PFKEY_UNIT64(len); 8068157123Sgnn p->sadb_lifetime_exttype = exttype; 8069157123Sgnn p->sadb_lifetime_allocations = src->allocations; 8070157123Sgnn p->sadb_lifetime_bytes = src->bytes; 8071157123Sgnn p->sadb_lifetime_addtime = src->addtime; 8072157123Sgnn p->sadb_lifetime_usetime = src->usetime; 8073157123Sgnn 8074157123Sgnn return m; 8075157123Sgnn 8076157123Sgnn} 8077