key.c revision 1.252
1 /* $NetBSD: key.c,v 1.252 2018/04/16 08:56:08 yamaguchi Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms Exp $ */ 3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.252 2018/04/16 08:56:08 yamaguchi Exp $"); 36 37 /* 38 * This code is referred to RFC 2367 39 */ 40 41 #if defined(_KERNEL_OPT) 42 #include "opt_inet.h" 43 #include "opt_ipsec.h" 44 #include "opt_gateway.h" 45 #include "opt_net_mpsafe.h" 46 #endif 47 48 #include <sys/types.h> 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/callout.h> 52 #include <sys/kernel.h> 53 #include <sys/mbuf.h> 54 #include <sys/domain.h> 55 #include <sys/socket.h> 56 #include <sys/socketvar.h> 57 #include <sys/sysctl.h> 58 #include <sys/errno.h> 59 #include <sys/proc.h> 60 #include <sys/queue.h> 61 #include <sys/syslog.h> 62 #include <sys/once.h> 63 #include <sys/cprng.h> 64 #include <sys/psref.h> 65 #include <sys/lwp.h> 66 #include <sys/workqueue.h> 67 #include <sys/kmem.h> 68 #include <sys/cpu.h> 69 #include <sys/atomic.h> 70 #include <sys/pslist.h> 71 #include <sys/mutex.h> 72 #include <sys/condvar.h> 73 #include <sys/localcount.h> 74 #include <sys/pserialize.h> 75 #include <sys/hash.h> 76 77 #include <net/if.h> 78 #include <net/route.h> 79 80 #include <netinet/in.h> 81 #include <netinet/in_systm.h> 82 #include <netinet/ip.h> 83 #include <netinet/in_var.h> 84 #ifdef INET 85 #include <netinet/ip_var.h> 86 #endif 87 88 #ifdef INET6 89 #include <netinet/ip6.h> 90 #include <netinet6/in6_var.h> 91 #include <netinet6/ip6_var.h> 92 #endif /* INET6 */ 93 94 #ifdef INET 95 #include <netinet/in_pcb.h> 96 #endif 97 #ifdef INET6 98 #include <netinet6/in6_pcb.h> 99 #endif /* INET6 */ 100 101 #include <net/pfkeyv2.h> 102 #include <netipsec/keydb.h> 103 #include <netipsec/key.h> 104 #include <netipsec/keysock.h> 105 #include <netipsec/key_debug.h> 106 107 #include <netipsec/ipsec.h> 108 #ifdef INET6 109 #include <netipsec/ipsec6.h> 110 #endif 111 #include <netipsec/ipsec_private.h> 112 113 #include <netipsec/xform.h> 114 #include <netipsec/ipcomp.h> 115 116 #define FULLMASK 0xff 117 #define _BITS(bytes) ((bytes) << 3) 118 119 #define PORT_NONE 0 120 #define PORT_LOOSE 1 121 #define PORT_STRICT 2 122 123 #ifndef SAHHASH_NHASH 124 #define SAHHASH_NHASH 128 125 #endif 126 127 #ifndef SAVLUT_NHASH 128 #define SAVLUT_NHASH 128 129 #endif 130 131 percpu_t *pfkeystat_percpu; 132 133 /* 134 * Note on SA reference counting: 135 * - SAs that are not in DEAD state will have (total external reference + 1) 136 * following value in reference count field. they cannot be freed and are 137 * referenced from SA header. 138 * - SAs that are in DEAD state will have (total external reference) 139 * in reference count field. they are ready to be freed. reference from 140 * SA header will be removed in key_delsav(), when the reference count 141 * field hits 0 (= no external reference other than from SA header. 142 */ 143 144 u_int32_t key_debug_level = 0; 145 static u_int key_spi_trycnt = 1000; 146 static u_int32_t key_spi_minval = 0x100; 147 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 148 static u_int32_t policy_id = 0; 149 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 150 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 151 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 152 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 153 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 154 155 static u_int32_t acq_seq = 0; 156 157 /* 158 * Locking order: there is no order for now; it means that any locks aren't 159 * overlapped. 160 */ 161 /* 162 * Locking notes on SPD: 163 * - Modifications to the key_spd.splist must be done with holding key_spd.lock 164 * which is a adaptive mutex 165 * - Read accesses to the key_spd.splist must be in pserialize(9) read sections 166 * - SP's lifetime is managed by localcount(9) 167 * - An SP that has been inserted to the key_spd.splist is initially referenced 168 * by none, i.e., a reference from the key_spd.splist isn't counted 169 * - When an SP is being destroyed, we change its state as DEAD, wait for 170 * references to the SP to be released, and then deallocate the SP 171 * (see key_unlink_sp) 172 * - Getting an SP 173 * - Normally we get an SP from the key_spd.splist (see key_lookup_sp_byspidx) 174 * - Must iterate the list and increment the reference count of a found SP 175 * (by key_sp_ref) in a pserialize read section 176 * - We can gain another reference from a held SP only if we check its state 177 * and take its reference in a pserialize read section 178 * (see esp_output for example) 179 * - We may get an SP from an SP cache. See below 180 * - A gotten SP must be released after use by KEY_SP_UNREF (key_sp_unref) 181 * - Updating member variables of an SP 182 * - Most member variables of an SP are immutable 183 * - Only sp->state and sp->lastused can be changed 184 * - sp->state of an SP is updated only when destroying it under key_spd.lock 185 * - SP caches 186 * - SPs can be cached in PCBs 187 * - The lifetime of the caches is controlled by the global generation counter 188 * (ipsec_spdgen) 189 * - The global counter value is stored when an SP is cached 190 * - If the stored value is different from the global counter then the cache 191 * is considered invalidated 192 * - The counter is incremented when an SP is being destroyed 193 * - So checking the generation and taking a reference to an SP should be 194 * in a pserialize read section 195 * - Note that caching doesn't increment the reference counter of an SP 196 * - SPs in sockets 197 * - Userland programs can set a policy to a socket by 198 * setsockopt(IP_IPSEC_POLICY) 199 * - Such policies (SPs) are set to a socket (PCB) and also inserted to 200 * the key_spd.socksplist list (not the key_spd.splist) 201 * - Such a policy is destroyed when a corresponding socket is destroed, 202 * however, a socket can be destroyed in softint so we cannot destroy 203 * it directly instead we just mark it DEAD and delay the destruction 204 * until GC by the timer 205 * - SP origin 206 * - SPs can be created by both userland programs and kernel components. 207 * The SPs created in kernel must not be removed by userland programs, 208 * although the SPs can be read by userland programs. 209 */ 210 /* 211 * Locking notes on SAD: 212 * - Data structures 213 * - SAs are managed by the list called key_sad.sahlists and sav lists of 214 * sah entries 215 * - An sav is supposed to be an SA from a viewpoint of users 216 * - A sah has sav lists for each SA state 217 * - Multiple saves with the same saidx can exist 218 * - Only one entry has MATURE state and others should be DEAD 219 * - DEAD entries are just ignored from searching 220 * - All sav whose state is MATURE or DYING are registered to the lookup 221 * table called key_sad.savlut in addition to the savlists. 222 * - The table is used to search an sav without use of saidx. 223 * - Modifications to the key_sad.sahlists, sah.savlist and key_sad.savlut 224 * must be done with holding key_sad.lock which is a adaptive mutex 225 * - Read accesses to the key_sad.sahlists, sah.savlist and key_sad.savlut 226 * must be in pserialize(9) read sections 227 * - sah's lifetime is managed by localcount(9) 228 * - Getting an sah entry 229 * - We get an sah from the key_sad.sahlists 230 * - Must iterate the list and increment the reference count of a found sah 231 * (by key_sah_ref) in a pserialize read section 232 * - A gotten sah must be released after use by key_sah_unref 233 * - An sah is destroyed when its state become DEAD and no sav is 234 * listed to the sah 235 * - The destruction is done only in the timer (see key_timehandler_sad) 236 * - sav's lifetime is managed by localcount(9) 237 * - Getting an sav entry 238 * - First get an sah by saidx and get an sav from either of sah's savlists 239 * - Must iterate the list and increment the reference count of a found sav 240 * (by key_sa_ref) in a pserialize read section 241 * - We can gain another reference from a held SA only if we check its state 242 * and take its reference in a pserialize read section 243 * (see esp_output for example) 244 * - A gotten sav must be released after use by key_sa_unref 245 * - An sav is destroyed when its state become DEAD 246 */ 247 /* 248 * Locking notes on misc data: 249 * - All lists of key_misc are protected by key_misc.lock 250 * - key_misc.lock must be held even for read accesses 251 */ 252 253 /* SPD */ 254 static struct { 255 kmutex_t lock; 256 kcondvar_t cv_lc; 257 struct pslist_head splist[IPSEC_DIR_MAX]; 258 /* 259 * The list has SPs that are set to a socket via 260 * setsockopt(IP_IPSEC_POLICY) from userland. See ipsec_set_policy. 261 */ 262 struct pslist_head socksplist; 263 264 pserialize_t psz; 265 kcondvar_t cv_psz; 266 bool psz_performing; 267 } key_spd __cacheline_aligned; 268 269 /* SAD */ 270 static struct { 271 kmutex_t lock; 272 kcondvar_t cv_lc; 273 struct pslist_head *sahlists; 274 u_long sahlistmask; 275 struct pslist_head *savlut; 276 u_long savlutmask; 277 278 pserialize_t psz; 279 kcondvar_t cv_psz; 280 bool psz_performing; 281 } key_sad __cacheline_aligned; 282 283 /* Misc data */ 284 static struct { 285 kmutex_t lock; 286 /* registed list */ 287 LIST_HEAD(_reglist, secreg) reglist[SADB_SATYPE_MAX + 1]; 288 #ifndef IPSEC_NONBLOCK_ACQUIRE 289 /* acquiring list */ 290 LIST_HEAD(_acqlist, secacq) acqlist; 291 #endif 292 #ifdef notyet 293 /* SP acquiring list */ 294 LIST_HEAD(_spacqlist, secspacq) spacqlist; 295 #endif 296 } key_misc __cacheline_aligned; 297 298 /* Macros for key_spd.splist */ 299 #define SPLIST_ENTRY_INIT(sp) \ 300 PSLIST_ENTRY_INIT((sp), pslist_entry) 301 #define SPLIST_ENTRY_DESTROY(sp) \ 302 PSLIST_ENTRY_DESTROY((sp), pslist_entry) 303 #define SPLIST_WRITER_REMOVE(sp) \ 304 PSLIST_WRITER_REMOVE((sp), pslist_entry) 305 #define SPLIST_READER_EMPTY(dir) \ 306 (PSLIST_READER_FIRST(&key_spd.splist[(dir)], struct secpolicy, \ 307 pslist_entry) == NULL) 308 #define SPLIST_READER_FOREACH(sp, dir) \ 309 PSLIST_READER_FOREACH((sp), &key_spd.splist[(dir)], \ 310 struct secpolicy, pslist_entry) 311 #define SPLIST_WRITER_FOREACH(sp, dir) \ 312 PSLIST_WRITER_FOREACH((sp), &key_spd.splist[(dir)], \ 313 struct secpolicy, pslist_entry) 314 #define SPLIST_WRITER_INSERT_AFTER(sp, new) \ 315 PSLIST_WRITER_INSERT_AFTER((sp), (new), pslist_entry) 316 #define SPLIST_WRITER_EMPTY(dir) \ 317 (PSLIST_WRITER_FIRST(&key_spd.splist[(dir)], struct secpolicy, \ 318 pslist_entry) == NULL) 319 #define SPLIST_WRITER_INSERT_HEAD(dir, sp) \ 320 PSLIST_WRITER_INSERT_HEAD(&key_spd.splist[(dir)], (sp), \ 321 pslist_entry) 322 #define SPLIST_WRITER_NEXT(sp) \ 323 PSLIST_WRITER_NEXT((sp), struct secpolicy, pslist_entry) 324 #define SPLIST_WRITER_INSERT_TAIL(dir, new) \ 325 do { \ 326 if (SPLIST_WRITER_EMPTY((dir))) { \ 327 SPLIST_WRITER_INSERT_HEAD((dir), (new)); \ 328 } else { \ 329 struct secpolicy *__sp; \ 330 SPLIST_WRITER_FOREACH(__sp, (dir)) { \ 331 if (SPLIST_WRITER_NEXT(__sp) == NULL) { \ 332 SPLIST_WRITER_INSERT_AFTER(__sp,\ 333 (new)); \ 334 break; \ 335 } \ 336 } \ 337 } \ 338 } while (0) 339 340 /* Macros for key_spd.socksplist */ 341 #define SOCKSPLIST_WRITER_FOREACH(sp) \ 342 PSLIST_WRITER_FOREACH((sp), &key_spd.socksplist, \ 343 struct secpolicy, pslist_entry) 344 #define SOCKSPLIST_READER_EMPTY() \ 345 (PSLIST_READER_FIRST(&key_spd.socksplist, struct secpolicy, \ 346 pslist_entry) == NULL) 347 348 /* Macros for key_sad.sahlist */ 349 #define SAHLIST_ENTRY_INIT(sah) \ 350 PSLIST_ENTRY_INIT((sah), pslist_entry) 351 #define SAHLIST_ENTRY_DESTROY(sah) \ 352 PSLIST_ENTRY_DESTROY((sah), pslist_entry) 353 #define SAHLIST_WRITER_REMOVE(sah) \ 354 PSLIST_WRITER_REMOVE((sah), pslist_entry) 355 #define SAHLIST_READER_FOREACH(sah) \ 356 for(int _i_sah = 0; _i_sah <= key_sad.sahlistmask; _i_sah++) \ 357 PSLIST_READER_FOREACH((sah), &key_sad.sahlists[_i_sah], \ 358 struct secashead, pslist_entry) 359 #define SAHLIST_READER_FOREACH_SAIDX(sah, saidx) \ 360 PSLIST_READER_FOREACH((sah), \ 361 &key_sad.sahlists[key_saidxhash((saidx), \ 362 key_sad.sahlistmask)], \ 363 struct secashead, pslist_entry) 364 #define SAHLIST_WRITER_FOREACH(sah) \ 365 for(int _i_sah = 0; _i_sah <= key_sad.sahlistmask; _i_sah++) \ 366 PSLIST_WRITER_FOREACH((sah), &key_sad.sahlists[_i_sah], \ 367 struct secashead, pslist_entry) 368 #define SAHLIST_WRITER_INSERT_HEAD(sah) \ 369 PSLIST_WRITER_INSERT_HEAD( \ 370 &key_sad.sahlists[key_saidxhash(&(sah)->saidx, \ 371 key_sad.sahlistmask)], \ 372 (sah), pslist_entry) 373 374 /* Macros for key_sad.sahlist#savlist */ 375 #define SAVLIST_ENTRY_INIT(sav) \ 376 PSLIST_ENTRY_INIT((sav), pslist_entry) 377 #define SAVLIST_ENTRY_DESTROY(sav) \ 378 PSLIST_ENTRY_DESTROY((sav), pslist_entry) 379 #define SAVLIST_READER_FIRST(sah, state) \ 380 PSLIST_READER_FIRST(&(sah)->savlist[(state)], struct secasvar, \ 381 pslist_entry) 382 #define SAVLIST_WRITER_REMOVE(sav) \ 383 PSLIST_WRITER_REMOVE((sav), pslist_entry) 384 #define SAVLIST_READER_FOREACH(sav, sah, state) \ 385 PSLIST_READER_FOREACH((sav), &(sah)->savlist[(state)], \ 386 struct secasvar, pslist_entry) 387 #define SAVLIST_WRITER_FOREACH(sav, sah, state) \ 388 PSLIST_WRITER_FOREACH((sav), &(sah)->savlist[(state)], \ 389 struct secasvar, pslist_entry) 390 #define SAVLIST_WRITER_INSERT_BEFORE(sav, new) \ 391 PSLIST_WRITER_INSERT_BEFORE((sav), (new), pslist_entry) 392 #define SAVLIST_WRITER_INSERT_AFTER(sav, new) \ 393 PSLIST_WRITER_INSERT_AFTER((sav), (new), pslist_entry) 394 #define SAVLIST_WRITER_EMPTY(sah, state) \ 395 (PSLIST_WRITER_FIRST(&(sah)->savlist[(state)], struct secasvar, \ 396 pslist_entry) == NULL) 397 #define SAVLIST_WRITER_INSERT_HEAD(sah, state, sav) \ 398 PSLIST_WRITER_INSERT_HEAD(&(sah)->savlist[(state)], (sav), \ 399 pslist_entry) 400 #define SAVLIST_WRITER_NEXT(sav) \ 401 PSLIST_WRITER_NEXT((sav), struct secasvar, pslist_entry) 402 #define SAVLIST_WRITER_INSERT_TAIL(sah, state, new) \ 403 do { \ 404 if (SAVLIST_WRITER_EMPTY((sah), (state))) { \ 405 SAVLIST_WRITER_INSERT_HEAD((sah), (state), (new));\ 406 } else { \ 407 struct secasvar *__sav; \ 408 SAVLIST_WRITER_FOREACH(__sav, (sah), (state)) { \ 409 if (SAVLIST_WRITER_NEXT(__sav) == NULL) {\ 410 SAVLIST_WRITER_INSERT_AFTER(__sav,\ 411 (new)); \ 412 break; \ 413 } \ 414 } \ 415 } \ 416 } while (0) 417 #define SAVLIST_READER_NEXT(sav) \ 418 PSLIST_READER_NEXT((sav), struct secasvar, pslist_entry) 419 420 /* Macros for key_sad.savlut */ 421 #define SAVLUT_READER_FOREACH(sav, dst, proto, hash_key) \ 422 PSLIST_READER_FOREACH((sav), \ 423 &key_sad.savlut[key_savluthash(dst, proto, hash_key, \ 424 key_sad.savlutmask)], \ 425 struct secasvar, pslist_entry_savlut) 426 #define SAVLUT_WRITER_INSERT_HEAD(sav) \ 427 key_savlut_writer_insert_head((sav)) 428 #define SAVLUT_WRITER_REMOVE(sav) \ 429 do { \ 430 if (!(sav)->savlut_added) \ 431 break; \ 432 PSLIST_WRITER_REMOVE((sav), pslist_entry_savlut); \ 433 (sav)->savlut_added = false; \ 434 } while(0) 435 436 /* search order for SAs */ 437 /* 438 * This order is important because we must select the oldest SA 439 * for outbound processing. For inbound, This is not important. 440 */ 441 static const u_int saorder_state_valid_prefer_old[] = { 442 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 443 }; 444 static const u_int saorder_state_valid_prefer_new[] = { 445 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 446 }; 447 448 static const u_int saorder_state_alive[] = { 449 /* except DEAD */ 450 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 451 }; 452 static const u_int saorder_state_any[] = { 453 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 454 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 455 }; 456 457 #define SASTATE_ALIVE_FOREACH(s) \ 458 for (int _i = 0; \ 459 _i < __arraycount(saorder_state_alive) ? \ 460 (s) = saorder_state_alive[_i], true : false; \ 461 _i++) 462 #define SASTATE_ANY_FOREACH(s) \ 463 for (int _i = 0; \ 464 _i < __arraycount(saorder_state_any) ? \ 465 (s) = saorder_state_any[_i], true : false; \ 466 _i++) 467 #define SASTATE_USABLE_FOREACH(s) \ 468 for (int _i = 0; \ 469 _i < __arraycount(saorder_state_valid_prefer_new) ? \ 470 (s) = saorder_state_valid_prefer_new[_i], \ 471 true : false; \ 472 _i++) 473 474 static const int minsize[] = { 475 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 476 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 477 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 478 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 479 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 480 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 481 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 482 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 483 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 484 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 485 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 486 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 487 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 488 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 489 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 490 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 491 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 492 0, /* SADB_X_EXT_KMPRIVATE */ 493 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 494 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 495 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 496 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 497 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 498 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 499 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 500 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 501 }; 502 static const int maxsize[] = { 503 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 504 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 505 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 506 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 507 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 508 0, /* SADB_EXT_ADDRESS_SRC */ 509 0, /* SADB_EXT_ADDRESS_DST */ 510 0, /* SADB_EXT_ADDRESS_PROXY */ 511 0, /* SADB_EXT_KEY_AUTH */ 512 0, /* SADB_EXT_KEY_ENCRYPT */ 513 0, /* SADB_EXT_IDENTITY_SRC */ 514 0, /* SADB_EXT_IDENTITY_DST */ 515 0, /* SADB_EXT_SENSITIVITY */ 516 0, /* SADB_EXT_PROPOSAL */ 517 0, /* SADB_EXT_SUPPORTED_AUTH */ 518 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 519 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 520 0, /* SADB_X_EXT_KMPRIVATE */ 521 0, /* SADB_X_EXT_POLICY */ 522 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 523 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 524 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 525 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 526 0, /* SADB_X_EXT_NAT_T_OAI */ 527 0, /* SADB_X_EXT_NAT_T_OAR */ 528 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 529 }; 530 531 static int ipsec_esp_keymin = 256; 532 static int ipsec_esp_auth = 0; 533 static int ipsec_ah_keymin = 128; 534 535 #ifdef SYSCTL_DECL 536 SYSCTL_DECL(_net_key); 537 #endif 538 539 #ifdef SYSCTL_INT 540 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 541 &key_debug_level, 0, ""); 542 543 /* max count of trial for the decision of spi value */ 544 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 545 &key_spi_trycnt, 0, ""); 546 547 /* minimum spi value to allocate automatically. */ 548 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 549 &key_spi_minval, 0, ""); 550 551 /* maximun spi value to allocate automatically. */ 552 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 553 &key_spi_maxval, 0, ""); 554 555 /* interval to initialize randseed */ 556 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 557 &key_int_random, 0, ""); 558 559 /* lifetime for larval SA */ 560 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 561 &key_larval_lifetime, 0, ""); 562 563 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 564 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 565 &key_blockacq_count, 0, ""); 566 567 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 568 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 569 &key_blockacq_lifetime, 0, ""); 570 571 /* ESP auth */ 572 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 573 &ipsec_esp_auth, 0, ""); 574 575 /* minimum ESP key length */ 576 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 577 &ipsec_esp_keymin, 0, ""); 578 579 /* minimum AH key length */ 580 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 581 &ipsec_ah_keymin, 0, ""); 582 583 /* perfered old SA rather than new SA */ 584 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 585 &key_prefered_oldsa, 0, ""); 586 #endif /* SYSCTL_INT */ 587 588 #define __LIST_CHAINED(elm) \ 589 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 590 #define LIST_INSERT_TAIL(head, elm, type, field) \ 591 do {\ 592 struct type *curelm = LIST_FIRST(head); \ 593 if (curelm == NULL) {\ 594 LIST_INSERT_HEAD(head, elm, field); \ 595 } else { \ 596 while (LIST_NEXT(curelm, field)) \ 597 curelm = LIST_NEXT(curelm, field);\ 598 LIST_INSERT_AFTER(curelm, elm, field);\ 599 }\ 600 } while (0) 601 602 #define KEY_CHKSASTATE(head, sav) \ 603 /* do */ { \ 604 if ((head) != (sav)) { \ 605 IPSECLOG(LOG_DEBUG, \ 606 "state mismatched (TREE=%d SA=%d)\n", \ 607 (head), (sav)); \ 608 continue; \ 609 } \ 610 } /* while (0) */ 611 612 #define KEY_CHKSPDIR(head, sp) \ 613 do { \ 614 if ((head) != (sp)) { \ 615 IPSECLOG(LOG_DEBUG, \ 616 "direction mismatched (TREE=%d SP=%d), anyway continue.\n",\ 617 (head), (sp)); \ 618 } \ 619 } while (0) 620 621 /* 622 * set parameters into secasindex buffer. 623 * Must allocate secasindex buffer before calling this function. 624 */ 625 static int 626 key_setsecasidx(int, int, int, const struct sockaddr *, 627 const struct sockaddr *, struct secasindex *); 628 629 /* key statistics */ 630 struct _keystat { 631 u_long getspi_count; /* the avarage of count to try to get new SPI */ 632 } keystat; 633 634 static void 635 key_init_spidx_bymsghdr(struct secpolicyindex *, const struct sadb_msghdr *); 636 637 static const struct sockaddr * 638 key_msghdr_get_sockaddr(const struct sadb_msghdr *mhp, int idx) 639 { 640 641 return PFKEY_ADDR_SADDR(mhp->ext[idx]); 642 } 643 644 static void 645 key_fill_replymsg(struct mbuf *m, int seq) 646 { 647 struct sadb_msg *msg; 648 649 KASSERT(m->m_len >= sizeof(*msg)); 650 651 msg = mtod(m, struct sadb_msg *); 652 msg->sadb_msg_errno = 0; 653 msg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 654 if (seq != 0) 655 msg->sadb_msg_seq = seq; 656 } 657 658 #if 0 659 static void key_freeso(struct socket *); 660 static void key_freesp_so(struct secpolicy **); 661 #endif 662 static struct secpolicy *key_getsp (const struct secpolicyindex *); 663 static struct secpolicy *key_getspbyid (u_int32_t); 664 static struct secpolicy *key_lookup_and_remove_sp(const struct secpolicyindex *, bool); 665 static struct secpolicy *key_lookupbyid_and_remove_sp(u_int32_t, bool); 666 static void key_destroy_sp(struct secpolicy *); 667 static struct mbuf *key_gather_mbuf (struct mbuf *, 668 const struct sadb_msghdr *, int, int, ...); 669 static int key_api_spdadd(struct socket *, struct mbuf *, 670 const struct sadb_msghdr *); 671 static u_int32_t key_getnewspid (void); 672 static int key_api_spddelete(struct socket *, struct mbuf *, 673 const struct sadb_msghdr *); 674 static int key_api_spddelete2(struct socket *, struct mbuf *, 675 const struct sadb_msghdr *); 676 static int key_api_spdget(struct socket *, struct mbuf *, 677 const struct sadb_msghdr *); 678 static int key_api_spdflush(struct socket *, struct mbuf *, 679 const struct sadb_msghdr *); 680 static int key_api_spddump(struct socket *, struct mbuf *, 681 const struct sadb_msghdr *); 682 static struct mbuf * key_setspddump (int *errorp, pid_t); 683 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 684 static int key_api_nat_map(struct socket *, struct mbuf *, 685 const struct sadb_msghdr *); 686 static struct mbuf *key_setdumpsp (struct secpolicy *, 687 u_int8_t, u_int32_t, pid_t); 688 static u_int key_getspreqmsglen (const struct secpolicy *); 689 static int key_spdexpire (struct secpolicy *); 690 static struct secashead *key_newsah (const struct secasindex *); 691 static void key_unlink_sah(struct secashead *); 692 static void key_destroy_sah(struct secashead *); 693 static bool key_sah_has_sav(struct secashead *); 694 static void key_sah_ref(struct secashead *); 695 static void key_sah_unref(struct secashead *); 696 static void key_init_sav(struct secasvar *); 697 static void key_destroy_sav(struct secasvar *); 698 static void key_destroy_sav_with_ref(struct secasvar *); 699 static struct secasvar *key_newsav(struct mbuf *, 700 const struct sadb_msghdr *, int *, const char*, int); 701 #define KEY_NEWSAV(m, sadb, e) \ 702 key_newsav(m, sadb, e, __func__, __LINE__) 703 static void key_delsav (struct secasvar *); 704 static struct secashead *key_getsah(const struct secasindex *, int); 705 static struct secashead *key_getsah_ref(const struct secasindex *, int); 706 static bool key_checkspidup(const struct secasindex *, u_int32_t); 707 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 708 static int key_setsaval (struct secasvar *, struct mbuf *, 709 const struct sadb_msghdr *); 710 static void key_freesaval(struct secasvar *); 711 static int key_init_xform(struct secasvar *); 712 static void key_clear_xform(struct secasvar *); 713 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 714 u_int8_t, u_int32_t, u_int32_t); 715 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 716 static struct mbuf *key_setsadbxtype (u_int16_t); 717 static struct mbuf *key_setsadbxfrag (u_int16_t); 718 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 719 static int key_checksalen (const union sockaddr_union *); 720 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 721 u_int32_t, pid_t, u_int16_t, int); 722 static struct mbuf *key_setsadbsa (struct secasvar *); 723 static struct mbuf *key_setsadbaddr(u_int16_t, 724 const struct sockaddr *, u_int8_t, u_int16_t, int); 725 #if 0 726 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 727 int, u_int64_t); 728 #endif 729 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 730 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 731 u_int32_t, int); 732 static void *key_newbuf (const void *, u_int); 733 #ifdef INET6 734 static int key_ismyaddr6 (const struct sockaddr_in6 *); 735 #endif 736 737 static void sysctl_net_keyv2_setup(struct sysctllog **); 738 static void sysctl_net_key_compat_setup(struct sysctllog **); 739 740 /* flags for key_saidx_match() */ 741 #define CMP_HEAD 1 /* protocol, addresses. */ 742 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 743 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 744 #define CMP_EXACTLY 4 /* all elements. */ 745 static int key_saidx_match(const struct secasindex *, 746 const struct secasindex *, int); 747 748 static int key_sockaddr_match(const struct sockaddr *, 749 const struct sockaddr *, int); 750 static int key_bb_match_withmask(const void *, const void *, u_int); 751 static u_int16_t key_satype2proto (u_int8_t); 752 static u_int8_t key_proto2satype (u_int16_t); 753 754 static int key_spidx_match_exactly(const struct secpolicyindex *, 755 const struct secpolicyindex *); 756 static int key_spidx_match_withmask(const struct secpolicyindex *, 757 const struct secpolicyindex *); 758 759 static int key_api_getspi(struct socket *, struct mbuf *, 760 const struct sadb_msghdr *); 761 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 762 const struct secasindex *); 763 static int key_handle_natt_info (struct secasvar *, 764 const struct sadb_msghdr *); 765 static int key_set_natt_ports (union sockaddr_union *, 766 union sockaddr_union *, 767 const struct sadb_msghdr *); 768 static int key_api_update(struct socket *, struct mbuf *, 769 const struct sadb_msghdr *); 770 #ifdef IPSEC_DOSEQCHECK 771 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 772 #endif 773 static int key_api_add(struct socket *, struct mbuf *, 774 const struct sadb_msghdr *); 775 static int key_setident (struct secashead *, struct mbuf *, 776 const struct sadb_msghdr *); 777 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 778 const struct sadb_msghdr *); 779 static int key_api_delete(struct socket *, struct mbuf *, 780 const struct sadb_msghdr *); 781 static int key_api_get(struct socket *, struct mbuf *, 782 const struct sadb_msghdr *); 783 784 static void key_getcomb_setlifetime (struct sadb_comb *); 785 static struct mbuf *key_getcomb_esp(int); 786 static struct mbuf *key_getcomb_ah(int); 787 static struct mbuf *key_getcomb_ipcomp(int); 788 static struct mbuf *key_getprop(const struct secasindex *, int); 789 790 static int key_acquire(const struct secasindex *, const struct secpolicy *, 791 int); 792 static int key_acquire_sendup_mbuf_later(struct mbuf *); 793 static void key_acquire_sendup_pending_mbuf(void); 794 #ifndef IPSEC_NONBLOCK_ACQUIRE 795 static struct secacq *key_newacq (const struct secasindex *); 796 static struct secacq *key_getacq (const struct secasindex *); 797 static struct secacq *key_getacqbyseq (u_int32_t); 798 #endif 799 #ifdef notyet 800 static struct secspacq *key_newspacq (const struct secpolicyindex *); 801 static struct secspacq *key_getspacq (const struct secpolicyindex *); 802 #endif 803 static int key_api_acquire(struct socket *, struct mbuf *, 804 const struct sadb_msghdr *); 805 static int key_api_register(struct socket *, struct mbuf *, 806 const struct sadb_msghdr *); 807 static int key_expire (struct secasvar *); 808 static int key_api_flush(struct socket *, struct mbuf *, 809 const struct sadb_msghdr *); 810 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 811 int *lenp, pid_t pid); 812 static int key_api_dump(struct socket *, struct mbuf *, 813 const struct sadb_msghdr *); 814 static int key_api_promisc(struct socket *, struct mbuf *, 815 const struct sadb_msghdr *); 816 static int key_senderror (struct socket *, struct mbuf *, int); 817 static int key_validate_ext (const struct sadb_ext *, int); 818 static int key_align (struct mbuf *, struct sadb_msghdr *); 819 #if 0 820 static const char *key_getfqdn (void); 821 static const char *key_getuserfqdn (void); 822 #endif 823 static void key_sa_chgstate (struct secasvar *, u_int8_t); 824 825 static struct mbuf *key_alloc_mbuf(int, int); 826 static struct mbuf *key_alloc_mbuf_simple(int, int); 827 828 static void key_timehandler(void *); 829 static void key_timehandler_work(struct work *, void *); 830 static struct callout key_timehandler_ch; 831 static struct workqueue *key_timehandler_wq; 832 static struct work key_timehandler_wk; 833 834 static inline void 835 key_savlut_writer_insert_head(struct secasvar *sav); 836 static inline uint32_t 837 key_saidxhash(const struct secasindex *, u_long); 838 static inline uint32_t 839 key_savluthash(const struct sockaddr *, 840 uint32_t, uint32_t, u_long); 841 842 /* 843 * Utilities for percpu counters for sadb_lifetime_allocations and 844 * sadb_lifetime_bytes. 845 */ 846 #define LIFETIME_COUNTER_ALLOCATIONS 0 847 #define LIFETIME_COUNTER_BYTES 1 848 #define LIFETIME_COUNTER_SIZE 2 849 850 typedef uint64_t lifetime_counters_t[LIFETIME_COUNTER_SIZE]; 851 852 static void 853 key_sum_lifetime_counters(void *p, void *arg, struct cpu_info *ci __unused) 854 { 855 lifetime_counters_t *one = p; 856 lifetime_counters_t *sum = arg; 857 858 (*sum)[LIFETIME_COUNTER_ALLOCATIONS] += (*one)[LIFETIME_COUNTER_ALLOCATIONS]; 859 (*sum)[LIFETIME_COUNTER_BYTES] += (*one)[LIFETIME_COUNTER_BYTES]; 860 } 861 862 u_int 863 key_sp_refcnt(const struct secpolicy *sp) 864 { 865 866 /* FIXME */ 867 return 0; 868 } 869 870 static void 871 key_spd_pserialize_perform(void) 872 { 873 874 KASSERT(mutex_owned(&key_spd.lock)); 875 876 while (key_spd.psz_performing) 877 cv_wait(&key_spd.cv_psz, &key_spd.lock); 878 key_spd.psz_performing = true; 879 mutex_exit(&key_spd.lock); 880 881 pserialize_perform(key_spd.psz); 882 883 mutex_enter(&key_spd.lock); 884 key_spd.psz_performing = false; 885 cv_broadcast(&key_spd.cv_psz); 886 } 887 888 /* 889 * Remove the sp from the key_spd.splist and wait for references to the sp 890 * to be released. key_spd.lock must be held. 891 */ 892 static void 893 key_unlink_sp(struct secpolicy *sp) 894 { 895 896 KASSERT(mutex_owned(&key_spd.lock)); 897 898 sp->state = IPSEC_SPSTATE_DEAD; 899 SPLIST_WRITER_REMOVE(sp); 900 901 /* Invalidate all cached SPD pointers in the PCBs. */ 902 ipsec_invalpcbcacheall(); 903 904 KDASSERT(mutex_ownable(softnet_lock)); 905 key_spd_pserialize_perform(); 906 907 localcount_drain(&sp->localcount, &key_spd.cv_lc, &key_spd.lock); 908 } 909 910 /* 911 * Return 0 when there are known to be no SP's for the specified 912 * direction. Otherwise return 1. This is used by IPsec code 913 * to optimize performance. 914 */ 915 int 916 key_havesp(u_int dir) 917 { 918 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 919 !SPLIST_READER_EMPTY(dir) : 1); 920 } 921 922 /* %%% IPsec policy management */ 923 /* 924 * allocating a SP for OUTBOUND or INBOUND packet. 925 * Must call key_freesp() later. 926 * OUT: NULL: not found 927 * others: found and return the pointer. 928 */ 929 struct secpolicy * 930 key_lookup_sp_byspidx(const struct secpolicyindex *spidx, 931 u_int dir, const char* where, int tag) 932 { 933 struct secpolicy *sp; 934 int s; 935 936 KASSERT(spidx != NULL); 937 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 938 939 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 940 941 /* get a SP entry */ 942 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 943 kdebug_secpolicyindex("objects", spidx); 944 } 945 946 s = pserialize_read_enter(); 947 SPLIST_READER_FOREACH(sp, dir) { 948 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 949 kdebug_secpolicyindex("in SPD", &sp->spidx); 950 } 951 952 if (sp->state == IPSEC_SPSTATE_DEAD) 953 continue; 954 if (key_spidx_match_withmask(&sp->spidx, spidx)) 955 goto found; 956 } 957 sp = NULL; 958 found: 959 if (sp) { 960 /* sanity check */ 961 KEY_CHKSPDIR(sp->spidx.dir, dir); 962 963 /* found a SPD entry */ 964 sp->lastused = time_uptime; 965 key_sp_ref(sp, where, tag); 966 } 967 pserialize_read_exit(s); 968 969 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 970 "DP return SP:%p (ID=%u) refcnt %u\n", 971 sp, sp ? sp->id : 0, key_sp_refcnt(sp)); 972 return sp; 973 } 974 975 /* 976 * return a policy that matches this particular inbound packet. 977 * XXX slow 978 */ 979 struct secpolicy * 980 key_gettunnel(const struct sockaddr *osrc, 981 const struct sockaddr *odst, 982 const struct sockaddr *isrc, 983 const struct sockaddr *idst, 984 const char* where, int tag) 985 { 986 struct secpolicy *sp; 987 const int dir = IPSEC_DIR_INBOUND; 988 int s; 989 struct ipsecrequest *r1, *r2, *p; 990 struct secpolicyindex spidx; 991 992 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 993 994 if (isrc->sa_family != idst->sa_family) { 995 IPSECLOG(LOG_ERR, "protocol family mismatched %d != %d\n.", 996 isrc->sa_family, idst->sa_family); 997 sp = NULL; 998 goto done; 999 } 1000 1001 s = pserialize_read_enter(); 1002 SPLIST_READER_FOREACH(sp, dir) { 1003 if (sp->state == IPSEC_SPSTATE_DEAD) 1004 continue; 1005 1006 r1 = r2 = NULL; 1007 for (p = sp->req; p; p = p->next) { 1008 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 1009 continue; 1010 1011 r1 = r2; 1012 r2 = p; 1013 1014 if (!r1) { 1015 /* here we look at address matches only */ 1016 spidx = sp->spidx; 1017 if (isrc->sa_len > sizeof(spidx.src) || 1018 idst->sa_len > sizeof(spidx.dst)) 1019 continue; 1020 memcpy(&spidx.src, isrc, isrc->sa_len); 1021 memcpy(&spidx.dst, idst, idst->sa_len); 1022 if (!key_spidx_match_withmask(&sp->spidx, &spidx)) 1023 continue; 1024 } else { 1025 if (!key_sockaddr_match(&r1->saidx.src.sa, isrc, PORT_NONE) || 1026 !key_sockaddr_match(&r1->saidx.dst.sa, idst, PORT_NONE)) 1027 continue; 1028 } 1029 1030 if (!key_sockaddr_match(&r2->saidx.src.sa, osrc, PORT_NONE) || 1031 !key_sockaddr_match(&r2->saidx.dst.sa, odst, PORT_NONE)) 1032 continue; 1033 1034 goto found; 1035 } 1036 } 1037 sp = NULL; 1038 found: 1039 if (sp) { 1040 sp->lastused = time_uptime; 1041 key_sp_ref(sp, where, tag); 1042 } 1043 pserialize_read_exit(s); 1044 done: 1045 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1046 "DP return SP:%p (ID=%u) refcnt %u\n", 1047 sp, sp ? sp->id : 0, key_sp_refcnt(sp)); 1048 return sp; 1049 } 1050 1051 /* 1052 * allocating an SA entry for an *OUTBOUND* packet. 1053 * checking each request entries in SP, and acquire an SA if need. 1054 * OUT: 0: there are valid requests. 1055 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 1056 */ 1057 int 1058 key_checkrequest(const struct ipsecrequest *isr, const struct secasindex *saidx, 1059 struct secasvar **ret) 1060 { 1061 u_int level; 1062 int error; 1063 struct secasvar *sav; 1064 1065 KASSERT(isr != NULL); 1066 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 1067 saidx->mode == IPSEC_MODE_TUNNEL, 1068 "unexpected policy %u", saidx->mode); 1069 1070 /* get current level */ 1071 level = ipsec_get_reqlevel(isr); 1072 1073 /* 1074 * XXX guard against protocol callbacks from the crypto 1075 * thread as they reference ipsecrequest.sav which we 1076 * temporarily null out below. Need to rethink how we 1077 * handle bundled SA's in the callback thread. 1078 */ 1079 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 1080 1081 sav = key_lookup_sa_bysaidx(saidx); 1082 if (sav != NULL) { 1083 *ret = sav; 1084 return 0; 1085 } 1086 1087 /* there is no SA */ 1088 error = key_acquire(saidx, isr->sp, M_NOWAIT); 1089 if (error != 0) { 1090 /* XXX What should I do ? */ 1091 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 1092 error); 1093 return error; 1094 } 1095 1096 if (level != IPSEC_LEVEL_REQUIRE) { 1097 /* XXX sigh, the interface to this routine is botched */ 1098 *ret = NULL; 1099 return 0; 1100 } else { 1101 return ENOENT; 1102 } 1103 } 1104 1105 /* 1106 * looking up a SA for policy entry from SAD. 1107 * NOTE: searching SAD of aliving state. 1108 * OUT: NULL: not found. 1109 * others: found and return the pointer. 1110 */ 1111 struct secasvar * 1112 key_lookup_sa_bysaidx(const struct secasindex *saidx) 1113 { 1114 struct secashead *sah; 1115 struct secasvar *sav = NULL; 1116 u_int stateidx, state; 1117 const u_int *saorder_state_valid; 1118 int arraysize; 1119 int s; 1120 1121 s = pserialize_read_enter(); 1122 sah = key_getsah(saidx, CMP_MODE_REQID); 1123 if (sah == NULL) 1124 goto out; 1125 1126 /* 1127 * search a valid state list for outbound packet. 1128 * This search order is important. 1129 */ 1130 if (key_prefered_oldsa) { 1131 saorder_state_valid = saorder_state_valid_prefer_old; 1132 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1133 } else { 1134 saorder_state_valid = saorder_state_valid_prefer_new; 1135 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1136 } 1137 1138 /* search valid state */ 1139 for (stateidx = 0; 1140 stateidx < arraysize; 1141 stateidx++) { 1142 1143 state = saorder_state_valid[stateidx]; 1144 1145 if (key_prefered_oldsa) 1146 sav = SAVLIST_READER_FIRST(sah, state); 1147 else { 1148 /* XXX need O(1) lookup */ 1149 struct secasvar *last = NULL; 1150 1151 SAVLIST_READER_FOREACH(sav, sah, state) 1152 last = sav; 1153 sav = last; 1154 } 1155 if (sav != NULL) { 1156 KEY_SA_REF(sav); 1157 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1158 "DP cause refcnt++:%d SA:%p\n", 1159 key_sa_refcnt(sav), sav); 1160 break; 1161 } 1162 } 1163 out: 1164 pserialize_read_exit(s); 1165 1166 return sav; 1167 } 1168 1169 #if 0 1170 static void 1171 key_sendup_message_delete(struct secasvar *sav) 1172 { 1173 struct mbuf *m, *result = 0; 1174 uint8_t satype; 1175 1176 satype = key_proto2satype(sav->sah->saidx.proto); 1177 if (satype == 0) 1178 goto msgfail; 1179 1180 m = key_setsadbmsg(SADB_DELETE, 0, satype, 0, 0, key_sa_refcnt(sav) - 1); 1181 if (m == NULL) 1182 goto msgfail; 1183 result = m; 1184 1185 /* set sadb_address for saidx's. */ 1186 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 1187 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 1188 if (m == NULL) 1189 goto msgfail; 1190 m_cat(result, m); 1191 1192 /* set sadb_address for saidx's. */ 1193 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.src.sa, 1194 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 1195 if (m == NULL) 1196 goto msgfail; 1197 m_cat(result, m); 1198 1199 /* create SA extension */ 1200 m = key_setsadbsa(sav); 1201 if (m == NULL) 1202 goto msgfail; 1203 m_cat(result, m); 1204 1205 if (result->m_len < sizeof(struct sadb_msg)) { 1206 result = m_pullup(result, sizeof(struct sadb_msg)); 1207 if (result == NULL) 1208 goto msgfail; 1209 } 1210 1211 result->m_pkthdr.len = 0; 1212 for (m = result; m; m = m->m_next) 1213 result->m_pkthdr.len += m->m_len; 1214 mtod(result, struct sadb_msg *)->sadb_msg_len = 1215 PFKEY_UNIT64(result->m_pkthdr.len); 1216 1217 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1218 result = NULL; 1219 msgfail: 1220 if (result) 1221 m_freem(result); 1222 } 1223 #endif 1224 1225 /* 1226 * allocating a usable SA entry for a *INBOUND* packet. 1227 * Must call key_freesav() later. 1228 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1229 * NULL: not found, or error occurred. 1230 * 1231 * In the comparison, no source address is used--for RFC2401 conformance. 1232 * To quote, from section 4.1: 1233 * A security association is uniquely identified by a triple consisting 1234 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1235 * security protocol (AH or ESP) identifier. 1236 * Note that, however, we do need to keep source address in IPsec SA. 1237 * IKE specification and PF_KEY specification do assume that we 1238 * keep source address in IPsec SA. We see a tricky situation here. 1239 * 1240 * sport and dport are used for NAT-T. network order is always used. 1241 */ 1242 struct secasvar * 1243 key_lookup_sa( 1244 const union sockaddr_union *dst, 1245 u_int proto, 1246 u_int32_t spi, 1247 u_int16_t sport, 1248 u_int16_t dport, 1249 const char* where, int tag) 1250 { 1251 struct secasvar *sav; 1252 int chkport; 1253 int s; 1254 1255 int must_check_spi = 1; 1256 int must_check_alg = 0; 1257 u_int16_t cpi = 0; 1258 u_int8_t algo = 0; 1259 uint32_t hash_key = spi; 1260 1261 if ((sport != 0) && (dport != 0)) 1262 chkport = PORT_STRICT; 1263 else 1264 chkport = PORT_NONE; 1265 1266 KASSERT(dst != NULL); 1267 1268 /* 1269 * XXX IPCOMP case 1270 * We use cpi to define spi here. In the case where cpi <= 1271 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1272 * the real spi. In this case, don't check the spi but check the 1273 * algorithm 1274 */ 1275 1276 if (proto == IPPROTO_IPCOMP) { 1277 u_int32_t tmp; 1278 tmp = ntohl(spi); 1279 cpi = (u_int16_t) tmp; 1280 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1281 algo = (u_int8_t) cpi; 1282 hash_key = algo; 1283 must_check_spi = 0; 1284 must_check_alg = 1; 1285 } 1286 } 1287 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1288 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1289 where, tag, must_check_spi, must_check_alg); 1290 1291 1292 /* 1293 * searching SAD. 1294 * XXX: to be checked internal IP header somewhere. Also when 1295 * IPsec tunnel packet is received. But ESP tunnel mode is 1296 * encrypted so we can't check internal IP header. 1297 */ 1298 s = pserialize_read_enter(); 1299 SAVLUT_READER_FOREACH(sav, &dst->sa, proto, hash_key) { 1300 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1301 "try match spi %#x, %#x\n", 1302 ntohl(spi), ntohl(sav->spi)); 1303 1304 /* do not return entries w/ unusable state */ 1305 if (!SADB_SASTATE_USABLE_P(sav)) { 1306 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1307 "bad state %d\n", sav->state); 1308 continue; 1309 } 1310 if (proto != sav->sah->saidx.proto) { 1311 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1312 "proto fail %d != %d\n", 1313 proto, sav->sah->saidx.proto); 1314 continue; 1315 } 1316 if (must_check_spi && spi != sav->spi) { 1317 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1318 "spi fail %#x != %#x\n", 1319 ntohl(spi), ntohl(sav->spi)); 1320 continue; 1321 } 1322 /* XXX only on the ipcomp case */ 1323 if (must_check_alg && algo != sav->alg_comp) { 1324 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1325 "algo fail %d != %d\n", 1326 algo, sav->alg_comp); 1327 continue; 1328 } 1329 1330 #if 0 /* don't check src */ 1331 /* Fix port in src->sa */ 1332 1333 /* check src address */ 1334 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1335 continue; 1336 #endif 1337 /* fix port of dst address XXX*/ 1338 key_porttosaddr(__UNCONST(dst), dport); 1339 /* check dst address */ 1340 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1341 continue; 1342 key_sa_ref(sav, where, tag); 1343 goto done; 1344 } 1345 sav = NULL; 1346 done: 1347 pserialize_read_exit(s); 1348 1349 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1350 "DP return SA:%p; refcnt %u\n", sav, key_sa_refcnt(sav)); 1351 return sav; 1352 } 1353 1354 static void 1355 key_validate_savlist(const struct secashead *sah, const u_int state) 1356 { 1357 #ifdef DEBUG 1358 struct secasvar *sav, *next; 1359 int s; 1360 1361 /* 1362 * The list should be sorted by lft_c->sadb_lifetime_addtime 1363 * in ascending order. 1364 */ 1365 s = pserialize_read_enter(); 1366 SAVLIST_READER_FOREACH(sav, sah, state) { 1367 next = SAVLIST_READER_NEXT(sav); 1368 if (next != NULL && 1369 sav->lft_c != NULL && next->lft_c != NULL) { 1370 KDASSERTMSG(sav->lft_c->sadb_lifetime_addtime <= 1371 next->lft_c->sadb_lifetime_addtime, 1372 "savlist is not sorted: sah=%p, state=%d, " 1373 "sav=%" PRIu64 ", next=%" PRIu64, sah, state, 1374 sav->lft_c->sadb_lifetime_addtime, 1375 next->lft_c->sadb_lifetime_addtime); 1376 } 1377 } 1378 pserialize_read_exit(s); 1379 #endif 1380 } 1381 1382 void 1383 key_init_sp(struct secpolicy *sp) 1384 { 1385 1386 ASSERT_SLEEPABLE(); 1387 1388 sp->state = IPSEC_SPSTATE_ALIVE; 1389 if (sp->policy == IPSEC_POLICY_IPSEC) 1390 KASSERT(sp->req != NULL); 1391 localcount_init(&sp->localcount); 1392 SPLIST_ENTRY_INIT(sp); 1393 } 1394 1395 /* 1396 * Must be called in a pserialize read section. A held SP 1397 * must be released by key_sp_unref after use. 1398 */ 1399 void 1400 key_sp_ref(struct secpolicy *sp, const char* where, int tag) 1401 { 1402 1403 localcount_acquire(&sp->localcount); 1404 1405 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1406 "DP SP:%p (ID=%u) from %s:%u; refcnt++ now %u\n", 1407 sp, sp->id, where, tag, key_sp_refcnt(sp)); 1408 } 1409 1410 /* 1411 * Must be called without holding key_spd.lock because the lock 1412 * would be held in localcount_release. 1413 */ 1414 void 1415 key_sp_unref(struct secpolicy *sp, const char* where, int tag) 1416 { 1417 1418 KDASSERT(mutex_ownable(&key_spd.lock)); 1419 1420 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1421 "DP SP:%p (ID=%u) from %s:%u; refcnt-- now %u\n", 1422 sp, sp->id, where, tag, key_sp_refcnt(sp)); 1423 1424 localcount_release(&sp->localcount, &key_spd.cv_lc, &key_spd.lock); 1425 } 1426 1427 static void 1428 key_init_sav(struct secasvar *sav) 1429 { 1430 1431 ASSERT_SLEEPABLE(); 1432 1433 localcount_init(&sav->localcount); 1434 SAVLIST_ENTRY_INIT(sav); 1435 } 1436 1437 u_int 1438 key_sa_refcnt(const struct secasvar *sav) 1439 { 1440 1441 /* FIXME */ 1442 return 0; 1443 } 1444 1445 void 1446 key_sa_ref(struct secasvar *sav, const char* where, int tag) 1447 { 1448 1449 localcount_acquire(&sav->localcount); 1450 1451 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1452 "DP cause refcnt++: SA:%p from %s:%u\n", 1453 sav, where, tag); 1454 } 1455 1456 void 1457 key_sa_unref(struct secasvar *sav, const char* where, int tag) 1458 { 1459 1460 KDASSERT(mutex_ownable(&key_sad.lock)); 1461 1462 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1463 "DP cause refcnt--: SA:%p from %s:%u\n", 1464 sav, where, tag); 1465 1466 localcount_release(&sav->localcount, &key_sad.cv_lc, &key_sad.lock); 1467 } 1468 1469 #if 0 1470 /* 1471 * Must be called after calling key_lookup_sp*(). 1472 * For the packet with socket. 1473 */ 1474 static void 1475 key_freeso(struct socket *so) 1476 { 1477 /* sanity check */ 1478 KASSERT(so != NULL); 1479 1480 switch (so->so_proto->pr_domain->dom_family) { 1481 #ifdef INET 1482 case PF_INET: 1483 { 1484 struct inpcb *pcb = sotoinpcb(so); 1485 1486 /* Does it have a PCB ? */ 1487 if (pcb == NULL) 1488 return; 1489 1490 struct inpcbpolicy *sp = pcb->inp_sp; 1491 key_freesp_so(&sp->sp_in); 1492 key_freesp_so(&sp->sp_out); 1493 } 1494 break; 1495 #endif 1496 #ifdef INET6 1497 case PF_INET6: 1498 { 1499 #ifdef HAVE_NRL_INPCB 1500 struct inpcb *pcb = sotoinpcb(so); 1501 struct inpcbpolicy *sp = pcb->inp_sp; 1502 1503 /* Does it have a PCB ? */ 1504 if (pcb == NULL) 1505 return; 1506 key_freesp_so(&sp->sp_in); 1507 key_freesp_so(&sp->sp_out); 1508 #else 1509 struct in6pcb *pcb = sotoin6pcb(so); 1510 1511 /* Does it have a PCB ? */ 1512 if (pcb == NULL) 1513 return; 1514 key_freesp_so(&pcb->in6p_sp->sp_in); 1515 key_freesp_so(&pcb->in6p_sp->sp_out); 1516 #endif 1517 } 1518 break; 1519 #endif /* INET6 */ 1520 default: 1521 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1522 so->so_proto->pr_domain->dom_family); 1523 return; 1524 } 1525 } 1526 1527 static void 1528 key_freesp_so(struct secpolicy **sp) 1529 { 1530 1531 KASSERT(sp != NULL); 1532 KASSERT(*sp != NULL); 1533 1534 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1535 (*sp)->policy == IPSEC_POLICY_BYPASS) 1536 return; 1537 1538 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1539 "invalid policy %u", (*sp)->policy); 1540 KEY_SP_UNREF(&sp); 1541 } 1542 #endif 1543 1544 static void 1545 key_sad_pserialize_perform(void) 1546 { 1547 1548 KASSERT(mutex_owned(&key_sad.lock)); 1549 1550 while (key_sad.psz_performing) 1551 cv_wait(&key_sad.cv_psz, &key_sad.lock); 1552 key_sad.psz_performing = true; 1553 mutex_exit(&key_sad.lock); 1554 1555 pserialize_perform(key_sad.psz); 1556 1557 mutex_enter(&key_sad.lock); 1558 key_sad.psz_performing = false; 1559 cv_broadcast(&key_sad.cv_psz); 1560 } 1561 1562 /* 1563 * Remove the sav from the savlist of its sah and wait for references to the sav 1564 * to be released. key_sad.lock must be held. 1565 */ 1566 static void 1567 key_unlink_sav(struct secasvar *sav) 1568 { 1569 1570 KASSERT(mutex_owned(&key_sad.lock)); 1571 1572 SAVLIST_WRITER_REMOVE(sav); 1573 SAVLUT_WRITER_REMOVE(sav); 1574 1575 KDASSERT(mutex_ownable(softnet_lock)); 1576 key_sad_pserialize_perform(); 1577 1578 localcount_drain(&sav->localcount, &key_sad.cv_lc, &key_sad.lock); 1579 } 1580 1581 /* 1582 * Destroy an sav where the sav must be unlinked from an sah 1583 * by say key_unlink_sav. 1584 */ 1585 static void 1586 key_destroy_sav(struct secasvar *sav) 1587 { 1588 1589 ASSERT_SLEEPABLE(); 1590 1591 localcount_fini(&sav->localcount); 1592 SAVLIST_ENTRY_DESTROY(sav); 1593 1594 key_delsav(sav); 1595 } 1596 1597 /* 1598 * Destroy sav with holding its reference. 1599 */ 1600 static void 1601 key_destroy_sav_with_ref(struct secasvar *sav) 1602 { 1603 1604 ASSERT_SLEEPABLE(); 1605 1606 mutex_enter(&key_sad.lock); 1607 sav->state = SADB_SASTATE_DEAD; 1608 SAVLIST_WRITER_REMOVE(sav); 1609 SAVLUT_WRITER_REMOVE(sav); 1610 mutex_exit(&key_sad.lock); 1611 1612 /* We cannot unref with holding key_sad.lock */ 1613 KEY_SA_UNREF(&sav); 1614 1615 mutex_enter(&key_sad.lock); 1616 KDASSERT(mutex_ownable(softnet_lock)); 1617 key_sad_pserialize_perform(); 1618 localcount_drain(&sav->localcount, &key_sad.cv_lc, &key_sad.lock); 1619 mutex_exit(&key_sad.lock); 1620 1621 key_destroy_sav(sav); 1622 } 1623 1624 /* %%% SPD management */ 1625 /* 1626 * free security policy entry. 1627 */ 1628 static void 1629 key_destroy_sp(struct secpolicy *sp) 1630 { 1631 1632 SPLIST_ENTRY_DESTROY(sp); 1633 localcount_fini(&sp->localcount); 1634 1635 key_free_sp(sp); 1636 1637 key_update_used(); 1638 } 1639 1640 void 1641 key_free_sp(struct secpolicy *sp) 1642 { 1643 struct ipsecrequest *isr = sp->req, *nextisr; 1644 1645 while (isr != NULL) { 1646 nextisr = isr->next; 1647 kmem_free(isr, sizeof(*isr)); 1648 isr = nextisr; 1649 } 1650 1651 kmem_free(sp, sizeof(*sp)); 1652 } 1653 1654 void 1655 key_socksplist_add(struct secpolicy *sp) 1656 { 1657 1658 mutex_enter(&key_spd.lock); 1659 PSLIST_WRITER_INSERT_HEAD(&key_spd.socksplist, sp, pslist_entry); 1660 mutex_exit(&key_spd.lock); 1661 1662 key_update_used(); 1663 } 1664 1665 /* 1666 * search SPD 1667 * OUT: NULL : not found 1668 * others : found, pointer to a SP. 1669 */ 1670 static struct secpolicy * 1671 key_getsp(const struct secpolicyindex *spidx) 1672 { 1673 struct secpolicy *sp; 1674 int s; 1675 1676 KASSERT(spidx != NULL); 1677 1678 s = pserialize_read_enter(); 1679 SPLIST_READER_FOREACH(sp, spidx->dir) { 1680 if (sp->state == IPSEC_SPSTATE_DEAD) 1681 continue; 1682 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1683 KEY_SP_REF(sp); 1684 pserialize_read_exit(s); 1685 return sp; 1686 } 1687 } 1688 pserialize_read_exit(s); 1689 1690 return NULL; 1691 } 1692 1693 /* 1694 * search SPD and remove found SP 1695 * OUT: NULL : not found 1696 * others : found, pointer to a SP. 1697 */ 1698 static struct secpolicy * 1699 key_lookup_and_remove_sp(const struct secpolicyindex *spidx, bool from_kernel) 1700 { 1701 struct secpolicy *sp = NULL; 1702 1703 mutex_enter(&key_spd.lock); 1704 SPLIST_WRITER_FOREACH(sp, spidx->dir) { 1705 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1706 /* 1707 * SPs created in kernel(e.g. ipsec(4) I/F) must not be 1708 * removed by userland programs. 1709 */ 1710 if (!from_kernel && sp->origin == IPSEC_SPORIGIN_KERNEL) 1711 continue; 1712 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1713 key_unlink_sp(sp); 1714 goto out; 1715 } 1716 } 1717 sp = NULL; 1718 out: 1719 mutex_exit(&key_spd.lock); 1720 1721 return sp; 1722 } 1723 1724 /* 1725 * get SP by index. 1726 * OUT: NULL : not found 1727 * others : found, pointer to a SP. 1728 */ 1729 static struct secpolicy * 1730 key_getspbyid(u_int32_t id) 1731 { 1732 struct secpolicy *sp; 1733 int s; 1734 1735 s = pserialize_read_enter(); 1736 SPLIST_READER_FOREACH(sp, IPSEC_DIR_INBOUND) { 1737 if (sp->state == IPSEC_SPSTATE_DEAD) 1738 continue; 1739 if (sp->id == id) { 1740 KEY_SP_REF(sp); 1741 goto out; 1742 } 1743 } 1744 1745 SPLIST_READER_FOREACH(sp, IPSEC_DIR_OUTBOUND) { 1746 if (sp->state == IPSEC_SPSTATE_DEAD) 1747 continue; 1748 if (sp->id == id) { 1749 KEY_SP_REF(sp); 1750 goto out; 1751 } 1752 } 1753 out: 1754 pserialize_read_exit(s); 1755 return sp; 1756 } 1757 1758 /* 1759 * get SP by index, remove and return it. 1760 * OUT: NULL : not found 1761 * others : found, pointer to a SP. 1762 */ 1763 static struct secpolicy * 1764 key_lookupbyid_and_remove_sp(u_int32_t id, bool from_kernel) 1765 { 1766 struct secpolicy *sp; 1767 1768 mutex_enter(&key_spd.lock); 1769 SPLIST_READER_FOREACH(sp, IPSEC_DIR_INBOUND) { 1770 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1771 /* 1772 * SPs created in kernel(e.g. ipsec(4) I/F) must not be 1773 * removed by userland programs. 1774 */ 1775 if (!from_kernel && sp->origin == IPSEC_SPORIGIN_KERNEL) 1776 continue; 1777 if (sp->id == id) 1778 goto out; 1779 } 1780 1781 SPLIST_READER_FOREACH(sp, IPSEC_DIR_OUTBOUND) { 1782 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1783 /* 1784 * SPs created in kernel(e.g. ipsec(4) I/F) must not be 1785 * removed by userland programs. 1786 */ 1787 if (!from_kernel && sp->origin == IPSEC_SPORIGIN_KERNEL) 1788 continue; 1789 if (sp->id == id) 1790 goto out; 1791 } 1792 out: 1793 if (sp != NULL) 1794 key_unlink_sp(sp); 1795 mutex_exit(&key_spd.lock); 1796 return sp; 1797 } 1798 1799 struct secpolicy * 1800 key_newsp(const char* where, int tag) 1801 { 1802 struct secpolicy *newsp = NULL; 1803 1804 newsp = kmem_zalloc(sizeof(struct secpolicy), KM_SLEEP); 1805 1806 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1807 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1808 return newsp; 1809 } 1810 1811 /* 1812 * create secpolicy structure from sadb_x_policy structure. 1813 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1814 * so must be set properly later. 1815 */ 1816 static struct secpolicy * 1817 _key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error, 1818 bool from_kernel) 1819 { 1820 struct secpolicy *newsp; 1821 1822 KASSERT(!cpu_softintr_p()); 1823 KASSERT(xpl0 != NULL); 1824 KASSERT(len >= sizeof(*xpl0)); 1825 1826 if (len != PFKEY_EXTLEN(xpl0)) { 1827 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1828 *error = EINVAL; 1829 return NULL; 1830 } 1831 1832 newsp = KEY_NEWSP(); 1833 if (newsp == NULL) { 1834 *error = ENOBUFS; 1835 return NULL; 1836 } 1837 1838 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1839 newsp->policy = xpl0->sadb_x_policy_type; 1840 1841 /* check policy */ 1842 switch (xpl0->sadb_x_policy_type) { 1843 case IPSEC_POLICY_DISCARD: 1844 case IPSEC_POLICY_NONE: 1845 case IPSEC_POLICY_ENTRUST: 1846 case IPSEC_POLICY_BYPASS: 1847 newsp->req = NULL; 1848 *error = 0; 1849 return newsp; 1850 1851 case IPSEC_POLICY_IPSEC: 1852 /* Continued */ 1853 break; 1854 default: 1855 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1856 key_free_sp(newsp); 1857 *error = EINVAL; 1858 return NULL; 1859 } 1860 1861 /* IPSEC_POLICY_IPSEC */ 1862 { 1863 int tlen; 1864 const struct sadb_x_ipsecrequest *xisr; 1865 uint16_t xisr_reqid; 1866 struct ipsecrequest **p_isr = &newsp->req; 1867 1868 /* validity check */ 1869 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1870 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1871 *error = EINVAL; 1872 goto free_exit; 1873 } 1874 1875 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1876 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1877 1878 while (tlen > 0) { 1879 /* length check */ 1880 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1881 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1882 *error = EINVAL; 1883 goto free_exit; 1884 } 1885 1886 /* allocate request buffer */ 1887 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1888 1889 /* set values */ 1890 (*p_isr)->next = NULL; 1891 1892 switch (xisr->sadb_x_ipsecrequest_proto) { 1893 case IPPROTO_ESP: 1894 case IPPROTO_AH: 1895 case IPPROTO_IPCOMP: 1896 break; 1897 default: 1898 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1899 xisr->sadb_x_ipsecrequest_proto); 1900 *error = EPROTONOSUPPORT; 1901 goto free_exit; 1902 } 1903 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1904 1905 switch (xisr->sadb_x_ipsecrequest_mode) { 1906 case IPSEC_MODE_TRANSPORT: 1907 case IPSEC_MODE_TUNNEL: 1908 break; 1909 case IPSEC_MODE_ANY: 1910 default: 1911 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1912 xisr->sadb_x_ipsecrequest_mode); 1913 *error = EINVAL; 1914 goto free_exit; 1915 } 1916 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1917 1918 switch (xisr->sadb_x_ipsecrequest_level) { 1919 case IPSEC_LEVEL_DEFAULT: 1920 case IPSEC_LEVEL_USE: 1921 case IPSEC_LEVEL_REQUIRE: 1922 break; 1923 case IPSEC_LEVEL_UNIQUE: 1924 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1925 /* validity check */ 1926 /* 1927 * case 1) from_kernel == false 1928 * That means the request comes from userland. 1929 * If range violation of reqid, kernel will 1930 * update it, don't refuse it. 1931 * 1932 * case 2) from_kernel == true 1933 * That means the request comes from kernel 1934 * (e.g. ipsec(4) I/F). 1935 * Use thre requested reqid to avoid inconsistency 1936 * between kernel's reqid and the reqid in pf_key 1937 * message sent to userland. The pf_key message is 1938 * built by diverting request mbuf. 1939 */ 1940 if (!from_kernel && 1941 xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1942 IPSECLOG(LOG_DEBUG, 1943 "reqid=%d range " 1944 "violation, updated by kernel.\n", 1945 xisr_reqid); 1946 xisr_reqid = 0; 1947 } 1948 1949 /* allocate new reqid id if reqid is zero. */ 1950 if (xisr_reqid == 0) { 1951 u_int16_t reqid = key_newreqid(); 1952 if (reqid == 0) { 1953 *error = ENOBUFS; 1954 goto free_exit; 1955 } 1956 (*p_isr)->saidx.reqid = reqid; 1957 } else { 1958 /* set it for manual keying. */ 1959 (*p_isr)->saidx.reqid = xisr_reqid; 1960 } 1961 break; 1962 1963 default: 1964 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1965 xisr->sadb_x_ipsecrequest_level); 1966 *error = EINVAL; 1967 goto free_exit; 1968 } 1969 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1970 1971 /* set IP addresses if there */ 1972 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1973 const struct sockaddr *paddr; 1974 1975 paddr = (const struct sockaddr *)(xisr + 1); 1976 1977 /* validity check */ 1978 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1979 IPSECLOG(LOG_DEBUG, "invalid request " 1980 "address length.\n"); 1981 *error = EINVAL; 1982 goto free_exit; 1983 } 1984 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1985 1986 paddr = (const struct sockaddr *)((const char *)paddr 1987 + paddr->sa_len); 1988 1989 /* validity check */ 1990 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1991 IPSECLOG(LOG_DEBUG, "invalid request " 1992 "address length.\n"); 1993 *error = EINVAL; 1994 goto free_exit; 1995 } 1996 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1997 } 1998 1999 (*p_isr)->sp = newsp; 2000 2001 /* initialization for the next. */ 2002 p_isr = &(*p_isr)->next; 2003 tlen -= xisr->sadb_x_ipsecrequest_len; 2004 2005 /* validity check */ 2006 if (tlen < 0) { 2007 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 2008 *error = EINVAL; 2009 goto free_exit; 2010 } 2011 2012 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 2013 xisr->sadb_x_ipsecrequest_len); 2014 } 2015 } 2016 2017 *error = 0; 2018 return newsp; 2019 2020 free_exit: 2021 key_free_sp(newsp); 2022 return NULL; 2023 } 2024 2025 struct secpolicy * 2026 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 2027 { 2028 2029 return _key_msg2sp(xpl0, len, error, false); 2030 } 2031 2032 u_int16_t 2033 key_newreqid(void) 2034 { 2035 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 2036 2037 auto_reqid = (auto_reqid == 0xffff ? 2038 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 2039 2040 /* XXX should be unique check */ 2041 2042 return auto_reqid; 2043 } 2044 2045 /* 2046 * copy secpolicy struct to sadb_x_policy structure indicated. 2047 */ 2048 struct mbuf * 2049 key_sp2msg(const struct secpolicy *sp, int mflag) 2050 { 2051 struct sadb_x_policy *xpl; 2052 int tlen; 2053 char *p; 2054 struct mbuf *m; 2055 2056 KASSERT(sp != NULL); 2057 2058 tlen = key_getspreqmsglen(sp); 2059 2060 m = key_alloc_mbuf(tlen, mflag); 2061 if (!m || m->m_next) { /*XXX*/ 2062 if (m) 2063 m_freem(m); 2064 return NULL; 2065 } 2066 2067 m->m_len = tlen; 2068 m->m_next = NULL; 2069 xpl = mtod(m, struct sadb_x_policy *); 2070 memset(xpl, 0, tlen); 2071 2072 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 2073 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 2074 xpl->sadb_x_policy_type = sp->policy; 2075 xpl->sadb_x_policy_dir = sp->spidx.dir; 2076 xpl->sadb_x_policy_id = sp->id; 2077 p = (char *)xpl + sizeof(*xpl); 2078 2079 /* if is the policy for ipsec ? */ 2080 if (sp->policy == IPSEC_POLICY_IPSEC) { 2081 struct sadb_x_ipsecrequest *xisr; 2082 struct ipsecrequest *isr; 2083 2084 for (isr = sp->req; isr != NULL; isr = isr->next) { 2085 2086 xisr = (struct sadb_x_ipsecrequest *)p; 2087 2088 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 2089 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 2090 xisr->sadb_x_ipsecrequest_level = isr->level; 2091 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 2092 2093 p += sizeof(*xisr); 2094 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 2095 p += isr->saidx.src.sa.sa_len; 2096 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 2097 p += isr->saidx.src.sa.sa_len; 2098 2099 xisr->sadb_x_ipsecrequest_len = 2100 PFKEY_ALIGN8(sizeof(*xisr) 2101 + isr->saidx.src.sa.sa_len 2102 + isr->saidx.dst.sa.sa_len); 2103 } 2104 } 2105 2106 return m; 2107 } 2108 2109 /* 2110 * m will not be freed nor modified. It never return NULL. 2111 * If it returns a mbuf of M_PKTHDR, the mbuf ensures to have 2112 * contiguous length at least sizeof(struct sadb_msg). 2113 */ 2114 static struct mbuf * 2115 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 2116 int ndeep, int nitem, ...) 2117 { 2118 va_list ap; 2119 int idx; 2120 int i; 2121 struct mbuf *result = NULL, *n; 2122 int len; 2123 2124 KASSERT(m != NULL); 2125 KASSERT(mhp != NULL); 2126 KASSERT(!cpu_softintr_p()); 2127 2128 va_start(ap, nitem); 2129 for (i = 0; i < nitem; i++) { 2130 idx = va_arg(ap, int); 2131 KASSERT(idx >= 0); 2132 KASSERT(idx <= SADB_EXT_MAX); 2133 /* don't attempt to pull empty extension */ 2134 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 2135 continue; 2136 if (idx != SADB_EXT_RESERVED && 2137 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 2138 continue; 2139 2140 if (idx == SADB_EXT_RESERVED) { 2141 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 2142 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2143 MGETHDR(n, M_WAITOK, MT_DATA); 2144 n->m_len = len; 2145 n->m_next = NULL; 2146 m_copydata(m, 0, sizeof(struct sadb_msg), 2147 mtod(n, void *)); 2148 } else if (i < ndeep) { 2149 len = mhp->extlen[idx]; 2150 n = key_alloc_mbuf(len, M_WAITOK); 2151 KASSERT(n->m_next == NULL); 2152 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 2153 mtod(n, void *)); 2154 } else { 2155 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 2156 M_WAITOK); 2157 } 2158 KASSERT(n != NULL); 2159 2160 if (result) 2161 m_cat(result, n); 2162 else 2163 result = n; 2164 } 2165 va_end(ap); 2166 2167 KASSERT(result != NULL); 2168 if ((result->m_flags & M_PKTHDR) != 0) { 2169 result->m_pkthdr.len = 0; 2170 for (n = result; n; n = n->m_next) 2171 result->m_pkthdr.len += n->m_len; 2172 KASSERT(result->m_len >= sizeof(struct sadb_msg)); 2173 } 2174 2175 return result; 2176 } 2177 2178 /* 2179 * The argument _sp must not overwrite until SP is created and registered 2180 * successfully. 2181 */ 2182 static int 2183 key_spdadd(struct socket *so, struct mbuf *m, 2184 const struct sadb_msghdr *mhp, struct secpolicy **_sp, 2185 bool from_kernel) 2186 { 2187 const struct sockaddr *src, *dst; 2188 const struct sadb_x_policy *xpl0; 2189 struct sadb_x_policy *xpl; 2190 const struct sadb_lifetime *lft = NULL; 2191 struct secpolicyindex spidx; 2192 struct secpolicy *newsp; 2193 int error; 2194 uint32_t sadb_x_policy_id; 2195 2196 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2197 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2198 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2199 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2200 return key_senderror(so, m, EINVAL); 2201 } 2202 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2203 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2204 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2205 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2206 return key_senderror(so, m, EINVAL); 2207 } 2208 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 2209 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 2210 sizeof(struct sadb_lifetime)) { 2211 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2212 return key_senderror(so, m, EINVAL); 2213 } 2214 lft = mhp->ext[SADB_EXT_LIFETIME_HARD]; 2215 } 2216 2217 xpl0 = mhp->ext[SADB_X_EXT_POLICY]; 2218 2219 /* checking the direciton. */ 2220 switch (xpl0->sadb_x_policy_dir) { 2221 case IPSEC_DIR_INBOUND: 2222 case IPSEC_DIR_OUTBOUND: 2223 break; 2224 default: 2225 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2226 return key_senderror(so, m, EINVAL); 2227 } 2228 2229 /* check policy */ 2230 /* key_api_spdadd() accepts DISCARD, NONE and IPSEC. */ 2231 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 2232 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 2233 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 2234 return key_senderror(so, m, EINVAL); 2235 } 2236 2237 /* policy requests are mandatory when action is ipsec. */ 2238 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 2239 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 2240 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 2241 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 2242 return key_senderror(so, m, EINVAL); 2243 } 2244 2245 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 2246 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 2247 2248 /* sanity check on addr pair */ 2249 if (src->sa_family != dst->sa_family) 2250 return key_senderror(so, m, EINVAL); 2251 if (src->sa_len != dst->sa_len) 2252 return key_senderror(so, m, EINVAL); 2253 2254 key_init_spidx_bymsghdr(&spidx, mhp); 2255 2256 /* 2257 * checking there is SP already or not. 2258 * SPDUPDATE doesn't depend on whether there is a SP or not. 2259 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 2260 * then error. 2261 */ 2262 { 2263 struct secpolicy *sp; 2264 2265 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 2266 sp = key_lookup_and_remove_sp(&spidx, from_kernel); 2267 if (sp != NULL) 2268 key_destroy_sp(sp); 2269 } else { 2270 sp = key_getsp(&spidx); 2271 if (sp != NULL) { 2272 KEY_SP_UNREF(&sp); 2273 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 2274 return key_senderror(so, m, EEXIST); 2275 } 2276 } 2277 } 2278 2279 /* allocation new SP entry */ 2280 newsp = _key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error, from_kernel); 2281 if (newsp == NULL) { 2282 return key_senderror(so, m, error); 2283 } 2284 2285 newsp->id = key_getnewspid(); 2286 if (newsp->id == 0) { 2287 kmem_free(newsp, sizeof(*newsp)); 2288 return key_senderror(so, m, ENOBUFS); 2289 } 2290 2291 newsp->spidx = spidx; 2292 newsp->created = time_uptime; 2293 newsp->lastused = newsp->created; 2294 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 2295 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 2296 if (from_kernel) 2297 newsp->origin = IPSEC_SPORIGIN_KERNEL; 2298 else 2299 newsp->origin = IPSEC_SPORIGIN_USER; 2300 2301 key_init_sp(newsp); 2302 if (from_kernel) 2303 KEY_SP_REF(newsp); 2304 2305 sadb_x_policy_id = newsp->id; 2306 2307 if (_sp != NULL) 2308 *_sp = newsp; 2309 2310 mutex_enter(&key_spd.lock); 2311 SPLIST_WRITER_INSERT_TAIL(newsp->spidx.dir, newsp); 2312 mutex_exit(&key_spd.lock); 2313 /* 2314 * We don't have a reference to newsp, so we must not touch newsp from 2315 * now on. If you want to do, you must take a reference beforehand. 2316 */ 2317 newsp = NULL; 2318 2319 #ifdef notyet 2320 /* delete the entry in key_misc.spacqlist */ 2321 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 2322 struct secspacq *spacq = key_getspacq(&spidx); 2323 if (spacq != NULL) { 2324 /* reset counter in order to deletion by timehandler. */ 2325 spacq->created = time_uptime; 2326 spacq->count = 0; 2327 } 2328 } 2329 #endif 2330 2331 /* Invalidate all cached SPD pointers in the PCBs. */ 2332 ipsec_invalpcbcacheall(); 2333 2334 #if defined(GATEWAY) 2335 /* Invalidate the ipflow cache, as well. */ 2336 ipflow_invalidate_all(0); 2337 #ifdef INET6 2338 if (in6_present) 2339 ip6flow_invalidate_all(0); 2340 #endif /* INET6 */ 2341 #endif /* GATEWAY */ 2342 2343 key_update_used(); 2344 2345 { 2346 struct mbuf *n, *mpolicy; 2347 int off; 2348 2349 /* create new sadb_msg to reply. */ 2350 if (lft) { 2351 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2352 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2353 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2354 } else { 2355 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2356 SADB_X_EXT_POLICY, 2357 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2358 } 2359 2360 key_fill_replymsg(n, 0); 2361 off = 0; 2362 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2363 sizeof(*xpl), &off); 2364 if (mpolicy == NULL) { 2365 /* n is already freed */ 2366 /* 2367 * valid sp has been created, so we does not overwrite _sp 2368 * NULL here. let caller decide to use the sp or not. 2369 */ 2370 return key_senderror(so, m, ENOBUFS); 2371 } 2372 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2373 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2374 m_freem(n); 2375 /* ditto */ 2376 return key_senderror(so, m, EINVAL); 2377 } 2378 2379 xpl->sadb_x_policy_id = sadb_x_policy_id; 2380 2381 m_freem(m); 2382 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2383 } 2384 } 2385 2386 /* 2387 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 2388 * add an entry to SP database, when received 2389 * <base, address(SD), (lifetime(H),) policy> 2390 * from the user(?). 2391 * Adding to SP database, 2392 * and send 2393 * <base, address(SD), (lifetime(H),) policy> 2394 * to the socket which was send. 2395 * 2396 * SPDADD set a unique policy entry. 2397 * SPDSETIDX like SPDADD without a part of policy requests. 2398 * SPDUPDATE replace a unique policy entry. 2399 * 2400 * m will always be freed. 2401 */ 2402 static int 2403 key_api_spdadd(struct socket *so, struct mbuf *m, 2404 const struct sadb_msghdr *mhp) 2405 { 2406 2407 return key_spdadd(so, m, mhp, NULL, false); 2408 } 2409 2410 struct secpolicy * 2411 key_kpi_spdadd(struct mbuf *m) 2412 { 2413 struct sadb_msghdr mh; 2414 int error; 2415 struct secpolicy *sp = NULL; 2416 2417 error = key_align(m, &mh); 2418 if (error) 2419 return NULL; 2420 2421 error = key_spdadd(NULL, m, &mh, &sp, true); 2422 if (error) { 2423 /* 2424 * Currently, when key_spdadd() cannot send a PFKEY message 2425 * which means SP has been created, key_spdadd() returns error 2426 * although SP is created successfully. 2427 * Kernel components would not care PFKEY messages, so return 2428 * the "sp" regardless of error code. key_spdadd() overwrites 2429 * the argument only if SP is created successfully. 2430 */ 2431 } 2432 return sp; 2433 } 2434 2435 /* 2436 * get new policy id. 2437 * OUT: 2438 * 0: failure. 2439 * others: success. 2440 */ 2441 static u_int32_t 2442 key_getnewspid(void) 2443 { 2444 u_int32_t newid = 0; 2445 int count = key_spi_trycnt; /* XXX */ 2446 struct secpolicy *sp; 2447 2448 /* when requesting to allocate spi ranged */ 2449 while (count--) { 2450 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2451 2452 sp = key_getspbyid(newid); 2453 if (sp == NULL) 2454 break; 2455 2456 KEY_SP_UNREF(&sp); 2457 } 2458 2459 if (count == 0 || newid == 0) { 2460 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2461 return 0; 2462 } 2463 2464 return newid; 2465 } 2466 2467 /* 2468 * SADB_SPDDELETE processing 2469 * receive 2470 * <base, address(SD), policy(*)> 2471 * from the user(?), and set SADB_SASTATE_DEAD, 2472 * and send, 2473 * <base, address(SD), policy(*)> 2474 * to the ikmpd. 2475 * policy(*) including direction of policy. 2476 * 2477 * m will always be freed. 2478 */ 2479 static int 2480 key_api_spddelete(struct socket *so, struct mbuf *m, 2481 const struct sadb_msghdr *mhp) 2482 { 2483 struct sadb_x_policy *xpl0; 2484 struct secpolicyindex spidx; 2485 struct secpolicy *sp; 2486 2487 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2488 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2489 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2490 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2491 return key_senderror(so, m, EINVAL); 2492 } 2493 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2494 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2495 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2496 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2497 return key_senderror(so, m, EINVAL); 2498 } 2499 2500 xpl0 = mhp->ext[SADB_X_EXT_POLICY]; 2501 2502 /* checking the directon. */ 2503 switch (xpl0->sadb_x_policy_dir) { 2504 case IPSEC_DIR_INBOUND: 2505 case IPSEC_DIR_OUTBOUND: 2506 break; 2507 default: 2508 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2509 return key_senderror(so, m, EINVAL); 2510 } 2511 2512 /* make secindex */ 2513 key_init_spidx_bymsghdr(&spidx, mhp); 2514 2515 /* Is there SP in SPD ? */ 2516 sp = key_lookup_and_remove_sp(&spidx, false); 2517 if (sp == NULL) { 2518 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2519 return key_senderror(so, m, EINVAL); 2520 } 2521 2522 /* save policy id to buffer to be returned. */ 2523 xpl0->sadb_x_policy_id = sp->id; 2524 2525 key_destroy_sp(sp); 2526 2527 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2528 2529 { 2530 struct mbuf *n; 2531 2532 /* create new sadb_msg to reply. */ 2533 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2534 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2535 key_fill_replymsg(n, 0); 2536 m_freem(m); 2537 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2538 } 2539 } 2540 2541 static struct mbuf * 2542 key_alloc_mbuf_simple(int len, int mflag) 2543 { 2544 struct mbuf *n; 2545 2546 KASSERT(mflag == M_NOWAIT || (mflag == M_WAITOK && !cpu_softintr_p())); 2547 2548 MGETHDR(n, mflag, MT_DATA); 2549 if (n && len > MHLEN) { 2550 MCLGET(n, mflag); 2551 if ((n->m_flags & M_EXT) == 0) { 2552 m_freem(n); 2553 n = NULL; 2554 } 2555 } 2556 return n; 2557 } 2558 2559 /* 2560 * SADB_SPDDELETE2 processing 2561 * receive 2562 * <base, policy(*)> 2563 * from the user(?), and set SADB_SASTATE_DEAD, 2564 * and send, 2565 * <base, policy(*)> 2566 * to the ikmpd. 2567 * policy(*) including direction of policy. 2568 * 2569 * m will always be freed. 2570 */ 2571 static int 2572 key_spddelete2(struct socket *so, struct mbuf *m, 2573 const struct sadb_msghdr *mhp, bool from_kernel) 2574 { 2575 u_int32_t id; 2576 struct secpolicy *sp; 2577 const struct sadb_x_policy *xpl; 2578 2579 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2580 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2581 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2582 return key_senderror(so, m, EINVAL); 2583 } 2584 2585 xpl = mhp->ext[SADB_X_EXT_POLICY]; 2586 id = xpl->sadb_x_policy_id; 2587 2588 /* Is there SP in SPD ? */ 2589 sp = key_lookupbyid_and_remove_sp(id, from_kernel); 2590 if (sp == NULL) { 2591 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2592 return key_senderror(so, m, EINVAL); 2593 } 2594 2595 key_destroy_sp(sp); 2596 2597 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2598 2599 { 2600 struct mbuf *n, *nn; 2601 int off, len; 2602 2603 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 2604 2605 /* create new sadb_msg to reply. */ 2606 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2607 2608 n = key_alloc_mbuf_simple(len, M_WAITOK); 2609 n->m_len = len; 2610 n->m_next = NULL; 2611 off = 0; 2612 2613 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2614 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2615 2616 KASSERTMSG(off == len, "length inconsistency"); 2617 2618 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2619 mhp->extlen[SADB_X_EXT_POLICY], M_WAITOK); 2620 2621 n->m_pkthdr.len = 0; 2622 for (nn = n; nn; nn = nn->m_next) 2623 n->m_pkthdr.len += nn->m_len; 2624 2625 key_fill_replymsg(n, 0); 2626 m_freem(m); 2627 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2628 } 2629 } 2630 2631 /* 2632 * SADB_SPDDELETE2 processing 2633 * receive 2634 * <base, policy(*)> 2635 * from the user(?), and set SADB_SASTATE_DEAD, 2636 * and send, 2637 * <base, policy(*)> 2638 * to the ikmpd. 2639 * policy(*) including direction of policy. 2640 * 2641 * m will always be freed. 2642 */ 2643 static int 2644 key_api_spddelete2(struct socket *so, struct mbuf *m, 2645 const struct sadb_msghdr *mhp) 2646 { 2647 2648 return key_spddelete2(so, m, mhp, false); 2649 } 2650 2651 int 2652 key_kpi_spddelete2(struct mbuf *m) 2653 { 2654 struct sadb_msghdr mh; 2655 int error; 2656 2657 error = key_align(m, &mh); 2658 if (error) 2659 return EINVAL; 2660 2661 return key_spddelete2(NULL, m, &mh, true); 2662 } 2663 2664 /* 2665 * SADB_X_GET processing 2666 * receive 2667 * <base, policy(*)> 2668 * from the user(?), 2669 * and send, 2670 * <base, address(SD), policy> 2671 * to the ikmpd. 2672 * policy(*) including direction of policy. 2673 * 2674 * m will always be freed. 2675 */ 2676 static int 2677 key_api_spdget(struct socket *so, struct mbuf *m, 2678 const struct sadb_msghdr *mhp) 2679 { 2680 u_int32_t id; 2681 struct secpolicy *sp; 2682 struct mbuf *n; 2683 const struct sadb_x_policy *xpl; 2684 2685 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2686 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2687 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2688 return key_senderror(so, m, EINVAL); 2689 } 2690 2691 xpl = mhp->ext[SADB_X_EXT_POLICY]; 2692 id = xpl->sadb_x_policy_id; 2693 2694 /* Is there SP in SPD ? */ 2695 sp = key_getspbyid(id); 2696 if (sp == NULL) { 2697 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2698 return key_senderror(so, m, ENOENT); 2699 } 2700 2701 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2702 mhp->msg->sadb_msg_pid); 2703 KEY_SP_UNREF(&sp); /* ref gained by key_getspbyid */ 2704 m_freem(m); 2705 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2706 } 2707 2708 #ifdef notyet 2709 /* 2710 * SADB_X_SPDACQUIRE processing. 2711 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2712 * send 2713 * <base, policy(*)> 2714 * to KMD, and expect to receive 2715 * <base> with SADB_X_SPDACQUIRE if error occurred, 2716 * or 2717 * <base, policy> 2718 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2719 * policy(*) is without policy requests. 2720 * 2721 * 0 : succeed 2722 * others: error number 2723 */ 2724 int 2725 key_spdacquire(const struct secpolicy *sp) 2726 { 2727 struct mbuf *result = NULL, *m; 2728 struct secspacq *newspacq; 2729 int error; 2730 2731 KASSERT(sp != NULL); 2732 KASSERTMSG(sp->req == NULL, "called but there is request"); 2733 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2734 "policy mismathed. IPsec is expected"); 2735 2736 /* Get an entry to check whether sent message or not. */ 2737 newspacq = key_getspacq(&sp->spidx); 2738 if (newspacq != NULL) { 2739 if (key_blockacq_count < newspacq->count) { 2740 /* reset counter and do send message. */ 2741 newspacq->count = 0; 2742 } else { 2743 /* increment counter and do nothing. */ 2744 newspacq->count++; 2745 return 0; 2746 } 2747 } else { 2748 /* make new entry for blocking to send SADB_ACQUIRE. */ 2749 newspacq = key_newspacq(&sp->spidx); 2750 if (newspacq == NULL) 2751 return ENOBUFS; 2752 2753 /* add to key_misc.acqlist */ 2754 LIST_INSERT_HEAD(&key_misc.spacqlist, newspacq, chain); 2755 } 2756 2757 /* create new sadb_msg to reply. */ 2758 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2759 if (!m) { 2760 error = ENOBUFS; 2761 goto fail; 2762 } 2763 result = m; 2764 2765 result->m_pkthdr.len = 0; 2766 for (m = result; m; m = m->m_next) 2767 result->m_pkthdr.len += m->m_len; 2768 2769 mtod(result, struct sadb_msg *)->sadb_msg_len = 2770 PFKEY_UNIT64(result->m_pkthdr.len); 2771 2772 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2773 2774 fail: 2775 if (result) 2776 m_freem(result); 2777 return error; 2778 } 2779 #endif /* notyet */ 2780 2781 /* 2782 * SADB_SPDFLUSH processing 2783 * receive 2784 * <base> 2785 * from the user, and free all entries in secpctree. 2786 * and send, 2787 * <base> 2788 * to the user. 2789 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2790 * 2791 * m will always be freed. 2792 */ 2793 static int 2794 key_api_spdflush(struct socket *so, struct mbuf *m, 2795 const struct sadb_msghdr *mhp) 2796 { 2797 struct sadb_msg *newmsg; 2798 struct secpolicy *sp; 2799 u_int dir; 2800 2801 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2802 return key_senderror(so, m, EINVAL); 2803 2804 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2805 retry: 2806 mutex_enter(&key_spd.lock); 2807 SPLIST_WRITER_FOREACH(sp, dir) { 2808 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 2809 /* 2810 * Userlang programs can remove SPs created by userland 2811 * probrams only, that is, they cannot remove SPs 2812 * created in kernel(e.g. ipsec(4) I/F). 2813 */ 2814 if (sp->origin == IPSEC_SPORIGIN_USER) { 2815 key_unlink_sp(sp); 2816 mutex_exit(&key_spd.lock); 2817 key_destroy_sp(sp); 2818 goto retry; 2819 } 2820 } 2821 mutex_exit(&key_spd.lock); 2822 } 2823 2824 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2825 2826 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2827 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2828 return key_senderror(so, m, ENOBUFS); 2829 } 2830 2831 if (m->m_next) 2832 m_freem(m->m_next); 2833 m->m_next = NULL; 2834 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2835 newmsg = mtod(m, struct sadb_msg *); 2836 newmsg->sadb_msg_errno = 0; 2837 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2838 2839 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2840 } 2841 2842 static struct sockaddr key_src = { 2843 .sa_len = 2, 2844 .sa_family = PF_KEY, 2845 }; 2846 2847 static struct mbuf * 2848 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2849 { 2850 struct secpolicy *sp; 2851 int cnt; 2852 u_int dir; 2853 struct mbuf *m, *n, *prev; 2854 int totlen; 2855 2856 KASSERT(mutex_owned(&key_spd.lock)); 2857 2858 *lenp = 0; 2859 2860 /* search SPD entry and get buffer size. */ 2861 cnt = 0; 2862 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2863 SPLIST_WRITER_FOREACH(sp, dir) { 2864 cnt++; 2865 } 2866 } 2867 2868 if (cnt == 0) { 2869 *errorp = ENOENT; 2870 return (NULL); 2871 } 2872 2873 m = NULL; 2874 prev = m; 2875 totlen = 0; 2876 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2877 SPLIST_WRITER_FOREACH(sp, dir) { 2878 --cnt; 2879 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2880 2881 totlen += n->m_pkthdr.len; 2882 if (!m) { 2883 m = n; 2884 } else { 2885 prev->m_nextpkt = n; 2886 } 2887 prev = n; 2888 } 2889 } 2890 2891 *lenp = totlen; 2892 *errorp = 0; 2893 return (m); 2894 } 2895 2896 /* 2897 * SADB_SPDDUMP processing 2898 * receive 2899 * <base> 2900 * from the user, and dump all SP leaves 2901 * and send, 2902 * <base> ..... 2903 * to the ikmpd. 2904 * 2905 * m will always be freed. 2906 */ 2907 static int 2908 key_api_spddump(struct socket *so, struct mbuf *m0, 2909 const struct sadb_msghdr *mhp) 2910 { 2911 struct mbuf *n; 2912 int error, len; 2913 int ok; 2914 pid_t pid; 2915 2916 pid = mhp->msg->sadb_msg_pid; 2917 /* 2918 * If the requestor has insufficient socket-buffer space 2919 * for the entire chain, nobody gets any response to the DUMP. 2920 * XXX For now, only the requestor ever gets anything. 2921 * Moreover, if the requestor has any space at all, they receive 2922 * the entire chain, otherwise the request is refused with ENOBUFS. 2923 */ 2924 if (sbspace(&so->so_rcv) <= 0) { 2925 return key_senderror(so, m0, ENOBUFS); 2926 } 2927 2928 mutex_enter(&key_spd.lock); 2929 n = key_setspddump_chain(&error, &len, pid); 2930 mutex_exit(&key_spd.lock); 2931 2932 if (n == NULL) { 2933 return key_senderror(so, m0, ENOENT); 2934 } 2935 { 2936 uint64_t *ps = PFKEY_STAT_GETREF(); 2937 ps[PFKEY_STAT_IN_TOTAL]++; 2938 ps[PFKEY_STAT_IN_BYTES] += len; 2939 PFKEY_STAT_PUTREF(); 2940 } 2941 2942 /* 2943 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2944 * The requestor receives either the entire chain, or an 2945 * error message with ENOBUFS. 2946 */ 2947 2948 /* 2949 * sbappendchainwith record takes the chain of entries, one 2950 * packet-record per SPD entry, prepends the key_src sockaddr 2951 * to each packet-record, links the sockaddr mbufs into a new 2952 * list of records, then appends the entire resulting 2953 * list to the requesting socket. 2954 */ 2955 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2956 SB_PRIO_ONESHOT_OVERFLOW); 2957 2958 if (!ok) { 2959 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2960 m_freem(n); 2961 return key_senderror(so, m0, ENOBUFS); 2962 } 2963 2964 m_freem(m0); 2965 return error; 2966 } 2967 2968 /* 2969 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2970 */ 2971 static int 2972 key_api_nat_map(struct socket *so, struct mbuf *m, 2973 const struct sadb_msghdr *mhp) 2974 { 2975 struct sadb_x_nat_t_type *type; 2976 struct sadb_x_nat_t_port *sport; 2977 struct sadb_x_nat_t_port *dport; 2978 struct sadb_address *iaddr, *raddr; 2979 struct sadb_x_nat_t_frag *frag; 2980 2981 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2982 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2983 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2984 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2985 return key_senderror(so, m, EINVAL); 2986 } 2987 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2988 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2989 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2990 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2991 return key_senderror(so, m, EINVAL); 2992 } 2993 2994 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2995 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2996 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2997 return key_senderror(so, m, EINVAL); 2998 } 2999 3000 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 3001 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 3002 IPSECLOG(LOG_DEBUG, "invalid message\n"); 3003 return key_senderror(so, m, EINVAL); 3004 } 3005 3006 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 3007 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 3008 IPSECLOG(LOG_DEBUG, "invalid message\n"); 3009 return key_senderror(so, m, EINVAL); 3010 } 3011 3012 type = mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 3013 sport = mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 3014 dport = mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 3015 iaddr = mhp->ext[SADB_X_EXT_NAT_T_OAI]; 3016 raddr = mhp->ext[SADB_X_EXT_NAT_T_OAR]; 3017 frag = mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 3018 3019 /* 3020 * XXX handle that, it should also contain a SA, or anything 3021 * that enable to update the SA information. 3022 */ 3023 3024 return 0; 3025 } 3026 3027 /* 3028 * Never return NULL. 3029 */ 3030 static struct mbuf * 3031 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 3032 { 3033 struct mbuf *result = NULL, *m; 3034 3035 KASSERT(!cpu_softintr_p()); 3036 3037 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, 3038 key_sp_refcnt(sp), M_WAITOK); 3039 result = m; 3040 3041 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3042 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto, M_WAITOK); 3043 m_cat(result, m); 3044 3045 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3046 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto, M_WAITOK); 3047 m_cat(result, m); 3048 3049 m = key_sp2msg(sp, M_WAITOK); 3050 m_cat(result, m); 3051 3052 KASSERT(result->m_flags & M_PKTHDR); 3053 KASSERT(result->m_len >= sizeof(struct sadb_msg)); 3054 3055 result->m_pkthdr.len = 0; 3056 for (m = result; m; m = m->m_next) 3057 result->m_pkthdr.len += m->m_len; 3058 3059 mtod(result, struct sadb_msg *)->sadb_msg_len = 3060 PFKEY_UNIT64(result->m_pkthdr.len); 3061 3062 return result; 3063 } 3064 3065 /* 3066 * get PFKEY message length for security policy and request. 3067 */ 3068 static u_int 3069 key_getspreqmsglen(const struct secpolicy *sp) 3070 { 3071 u_int tlen; 3072 3073 tlen = sizeof(struct sadb_x_policy); 3074 3075 /* if is the policy for ipsec ? */ 3076 if (sp->policy != IPSEC_POLICY_IPSEC) 3077 return tlen; 3078 3079 /* get length of ipsec requests */ 3080 { 3081 const struct ipsecrequest *isr; 3082 int len; 3083 3084 for (isr = sp->req; isr != NULL; isr = isr->next) { 3085 len = sizeof(struct sadb_x_ipsecrequest) 3086 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 3087 3088 tlen += PFKEY_ALIGN8(len); 3089 } 3090 } 3091 3092 return tlen; 3093 } 3094 3095 /* 3096 * SADB_SPDEXPIRE processing 3097 * send 3098 * <base, address(SD), lifetime(CH), policy> 3099 * to KMD by PF_KEY. 3100 * 3101 * OUT: 0 : succeed 3102 * others : error number 3103 */ 3104 static int 3105 key_spdexpire(struct secpolicy *sp) 3106 { 3107 int s; 3108 struct mbuf *result = NULL, *m; 3109 int len; 3110 int error = -1; 3111 struct sadb_lifetime *lt; 3112 3113 /* XXX: Why do we lock ? */ 3114 s = splsoftnet(); /*called from softclock()*/ 3115 3116 KASSERT(sp != NULL); 3117 3118 /* set msg header */ 3119 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0, M_WAITOK); 3120 result = m; 3121 3122 /* create lifetime extension (current and hard) */ 3123 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 3124 m = key_alloc_mbuf(len, M_WAITOK); 3125 KASSERT(m->m_next == NULL); 3126 3127 memset(mtod(m, void *), 0, len); 3128 lt = mtod(m, struct sadb_lifetime *); 3129 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3130 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3131 lt->sadb_lifetime_allocations = 0; 3132 lt->sadb_lifetime_bytes = 0; 3133 lt->sadb_lifetime_addtime = time_mono_to_wall(sp->created); 3134 lt->sadb_lifetime_usetime = time_mono_to_wall(sp->lastused); 3135 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 3136 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3137 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 3138 lt->sadb_lifetime_allocations = 0; 3139 lt->sadb_lifetime_bytes = 0; 3140 lt->sadb_lifetime_addtime = sp->lifetime; 3141 lt->sadb_lifetime_usetime = sp->validtime; 3142 m_cat(result, m); 3143 3144 /* set sadb_address for source */ 3145 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 3146 sp->spidx.prefs, sp->spidx.ul_proto, M_WAITOK); 3147 m_cat(result, m); 3148 3149 /* set sadb_address for destination */ 3150 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 3151 sp->spidx.prefd, sp->spidx.ul_proto, M_WAITOK); 3152 m_cat(result, m); 3153 3154 /* set secpolicy */ 3155 m = key_sp2msg(sp, M_WAITOK); 3156 m_cat(result, m); 3157 3158 KASSERT(result->m_flags & M_PKTHDR); 3159 KASSERT(result->m_len >= sizeof(struct sadb_msg)); 3160 3161 result->m_pkthdr.len = 0; 3162 for (m = result; m; m = m->m_next) 3163 result->m_pkthdr.len += m->m_len; 3164 3165 mtod(result, struct sadb_msg *)->sadb_msg_len = 3166 PFKEY_UNIT64(result->m_pkthdr.len); 3167 3168 error = key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 3169 splx(s); 3170 return error; 3171 } 3172 3173 /* %%% SAD management */ 3174 /* 3175 * allocating a memory for new SA head, and copy from the values of mhp. 3176 * OUT: NULL : failure due to the lack of memory. 3177 * others : pointer to new SA head. 3178 */ 3179 static struct secashead * 3180 key_newsah(const struct secasindex *saidx) 3181 { 3182 struct secashead *newsah; 3183 int i; 3184 3185 KASSERT(saidx != NULL); 3186 3187 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 3188 for (i = 0; i < __arraycount(newsah->savlist); i++) 3189 PSLIST_INIT(&newsah->savlist[i]); 3190 newsah->saidx = *saidx; 3191 3192 localcount_init(&newsah->localcount); 3193 /* Take a reference for the caller */ 3194 localcount_acquire(&newsah->localcount); 3195 3196 /* Add to the sah list */ 3197 SAHLIST_ENTRY_INIT(newsah); 3198 newsah->state = SADB_SASTATE_MATURE; 3199 mutex_enter(&key_sad.lock); 3200 SAHLIST_WRITER_INSERT_HEAD(newsah); 3201 mutex_exit(&key_sad.lock); 3202 3203 return newsah; 3204 } 3205 3206 static bool 3207 key_sah_has_sav(struct secashead *sah) 3208 { 3209 u_int state; 3210 3211 KASSERT(mutex_owned(&key_sad.lock)); 3212 3213 SASTATE_ANY_FOREACH(state) { 3214 if (!SAVLIST_WRITER_EMPTY(sah, state)) 3215 return true; 3216 } 3217 3218 return false; 3219 } 3220 3221 static void 3222 key_unlink_sah(struct secashead *sah) 3223 { 3224 3225 KASSERT(!cpu_softintr_p()); 3226 KASSERT(mutex_owned(&key_sad.lock)); 3227 KASSERT(sah->state == SADB_SASTATE_DEAD); 3228 3229 /* Remove from the sah list */ 3230 SAHLIST_WRITER_REMOVE(sah); 3231 3232 KDASSERT(mutex_ownable(softnet_lock)); 3233 key_sad_pserialize_perform(); 3234 3235 localcount_drain(&sah->localcount, &key_sad.cv_lc, &key_sad.lock); 3236 } 3237 3238 static void 3239 key_destroy_sah(struct secashead *sah) 3240 { 3241 3242 rtcache_free(&sah->sa_route); 3243 3244 SAHLIST_ENTRY_DESTROY(sah); 3245 localcount_fini(&sah->localcount); 3246 3247 if (sah->idents != NULL) 3248 kmem_free(sah->idents, sah->idents_len); 3249 if (sah->identd != NULL) 3250 kmem_free(sah->identd, sah->identd_len); 3251 3252 kmem_free(sah, sizeof(*sah)); 3253 } 3254 3255 /* 3256 * allocating a new SA with LARVAL state. 3257 * key_api_add() and key_api_getspi() call, 3258 * and copy the values of mhp into new buffer. 3259 * When SAD message type is GETSPI: 3260 * to set sequence number from acq_seq++, 3261 * to set zero to SPI. 3262 * not to call key_setsava(). 3263 * OUT: NULL : fail 3264 * others : pointer to new secasvar. 3265 * 3266 * does not modify mbuf. does not free mbuf on error. 3267 */ 3268 static struct secasvar * 3269 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 3270 int *errp, const char* where, int tag) 3271 { 3272 struct secasvar *newsav; 3273 const struct sadb_sa *xsa; 3274 3275 KASSERT(!cpu_softintr_p()); 3276 KASSERT(m != NULL); 3277 KASSERT(mhp != NULL); 3278 KASSERT(mhp->msg != NULL); 3279 3280 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 3281 3282 switch (mhp->msg->sadb_msg_type) { 3283 case SADB_GETSPI: 3284 newsav->spi = 0; 3285 3286 #ifdef IPSEC_DOSEQCHECK 3287 /* sync sequence number */ 3288 if (mhp->msg->sadb_msg_seq == 0) 3289 newsav->seq = 3290 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 3291 else 3292 #endif 3293 newsav->seq = mhp->msg->sadb_msg_seq; 3294 break; 3295 3296 case SADB_ADD: 3297 /* sanity check */ 3298 if (mhp->ext[SADB_EXT_SA] == NULL) { 3299 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 3300 *errp = EINVAL; 3301 goto error; 3302 } 3303 xsa = mhp->ext[SADB_EXT_SA]; 3304 newsav->spi = xsa->sadb_sa_spi; 3305 newsav->seq = mhp->msg->sadb_msg_seq; 3306 break; 3307 default: 3308 *errp = EINVAL; 3309 goto error; 3310 } 3311 3312 /* copy sav values */ 3313 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 3314 *errp = key_setsaval(newsav, m, mhp); 3315 if (*errp) 3316 goto error; 3317 } else { 3318 /* We don't allow lft_c to be NULL */ 3319 newsav->lft_c = kmem_zalloc(sizeof(struct sadb_lifetime), 3320 KM_SLEEP); 3321 newsav->lft_c_counters_percpu = 3322 percpu_alloc(sizeof(lifetime_counters_t)); 3323 } 3324 3325 /* reset created */ 3326 newsav->created = time_uptime; 3327 newsav->pid = mhp->msg->sadb_msg_pid; 3328 3329 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3330 "DP from %s:%u return SA:%p\n", where, tag, newsav); 3331 return newsav; 3332 3333 error: 3334 KASSERT(*errp != 0); 3335 kmem_free(newsav, sizeof(*newsav)); 3336 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3337 "DP from %s:%u return SA:NULL\n", where, tag); 3338 return NULL; 3339 } 3340 3341 3342 static void 3343 key_clear_xform(struct secasvar *sav) 3344 { 3345 3346 /* 3347 * Cleanup xform state. Note that zeroize'ing causes the 3348 * keys to be cleared; otherwise we must do it ourself. 3349 */ 3350 if (sav->tdb_xform != NULL) { 3351 sav->tdb_xform->xf_zeroize(sav); 3352 sav->tdb_xform = NULL; 3353 } else { 3354 if (sav->key_auth != NULL) 3355 explicit_memset(_KEYBUF(sav->key_auth), 0, 3356 _KEYLEN(sav->key_auth)); 3357 if (sav->key_enc != NULL) 3358 explicit_memset(_KEYBUF(sav->key_enc), 0, 3359 _KEYLEN(sav->key_enc)); 3360 } 3361 } 3362 3363 /* 3364 * free() SA variable entry. 3365 */ 3366 static void 3367 key_delsav(struct secasvar *sav) 3368 { 3369 3370 key_clear_xform(sav); 3371 key_freesaval(sav); 3372 kmem_free(sav, sizeof(*sav)); 3373 } 3374 3375 /* 3376 * Must be called in a pserialize read section. A held sah 3377 * must be released by key_sah_unref after use. 3378 */ 3379 static void 3380 key_sah_ref(struct secashead *sah) 3381 { 3382 3383 localcount_acquire(&sah->localcount); 3384 } 3385 3386 /* 3387 * Must be called without holding key_sad.lock because the lock 3388 * would be held in localcount_release. 3389 */ 3390 static void 3391 key_sah_unref(struct secashead *sah) 3392 { 3393 3394 KDASSERT(mutex_ownable(&key_sad.lock)); 3395 3396 localcount_release(&sah->localcount, &key_sad.cv_lc, &key_sad.lock); 3397 } 3398 3399 /* 3400 * Search SAD and return sah. Must be called in a pserialize 3401 * read section. 3402 * OUT: 3403 * NULL : not found 3404 * others : found, pointer to a SA. 3405 */ 3406 static struct secashead * 3407 key_getsah(const struct secasindex *saidx, int flag) 3408 { 3409 struct secashead *sah; 3410 3411 SAHLIST_READER_FOREACH_SAIDX(sah, saidx) { 3412 if (sah->state == SADB_SASTATE_DEAD) 3413 continue; 3414 if (key_saidx_match(&sah->saidx, saidx, flag)) 3415 return sah; 3416 } 3417 3418 return NULL; 3419 } 3420 3421 /* 3422 * Search SAD and return sah. If sah is returned, the caller must call 3423 * key_sah_unref to releaset a reference. 3424 * OUT: 3425 * NULL : not found 3426 * others : found, pointer to a SA. 3427 */ 3428 static struct secashead * 3429 key_getsah_ref(const struct secasindex *saidx, int flag) 3430 { 3431 struct secashead *sah; 3432 int s; 3433 3434 s = pserialize_read_enter(); 3435 sah = key_getsah(saidx, flag); 3436 if (sah != NULL) 3437 key_sah_ref(sah); 3438 pserialize_read_exit(s); 3439 3440 return sah; 3441 } 3442 3443 /* 3444 * check not to be duplicated SPI. 3445 * NOTE: this function is too slow due to searching all SAD. 3446 * OUT: 3447 * NULL : not found 3448 * others : found, pointer to a SA. 3449 */ 3450 static bool 3451 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3452 { 3453 struct secashead *sah; 3454 struct secasvar *sav; 3455 int s; 3456 3457 /* check address family */ 3458 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3459 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3460 return false; 3461 } 3462 3463 /* check all SAD */ 3464 s = pserialize_read_enter(); 3465 SAHLIST_READER_FOREACH(sah) { 3466 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3467 continue; 3468 sav = key_getsavbyspi(sah, spi); 3469 if (sav != NULL) { 3470 pserialize_read_exit(s); 3471 KEY_SA_UNREF(&sav); 3472 return true; 3473 } 3474 } 3475 pserialize_read_exit(s); 3476 3477 return false; 3478 } 3479 3480 /* 3481 * search SAD litmited alive SA, protocol, SPI. 3482 * OUT: 3483 * NULL : not found 3484 * others : found, pointer to a SA. 3485 */ 3486 static struct secasvar * 3487 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3488 { 3489 struct secasvar *sav = NULL; 3490 u_int state; 3491 int s; 3492 3493 /* search all status */ 3494 s = pserialize_read_enter(); 3495 SASTATE_ALIVE_FOREACH(state) { 3496 SAVLIST_READER_FOREACH(sav, sah, state) { 3497 /* sanity check */ 3498 if (sav->state != state) { 3499 IPSECLOG(LOG_DEBUG, 3500 "invalid sav->state (queue: %d SA: %d)\n", 3501 state, sav->state); 3502 continue; 3503 } 3504 3505 if (sav->spi == spi) { 3506 KEY_SA_REF(sav); 3507 goto out; 3508 } 3509 } 3510 } 3511 out: 3512 pserialize_read_exit(s); 3513 3514 return sav; 3515 } 3516 3517 /* 3518 * Free allocated data to member variables of sav: 3519 * sav->replay, sav->key_* and sav->lft_*. 3520 */ 3521 static void 3522 key_freesaval(struct secasvar *sav) 3523 { 3524 3525 KASSERT(key_sa_refcnt(sav) == 0); 3526 3527 if (sav->replay != NULL) 3528 kmem_intr_free(sav->replay, sav->replay_len); 3529 if (sav->key_auth != NULL) 3530 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3531 if (sav->key_enc != NULL) 3532 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3533 if (sav->lft_c_counters_percpu != NULL) { 3534 percpu_free(sav->lft_c_counters_percpu, 3535 sizeof(lifetime_counters_t)); 3536 } 3537 if (sav->lft_c != NULL) 3538 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3539 if (sav->lft_h != NULL) 3540 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3541 if (sav->lft_s != NULL) 3542 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3543 } 3544 3545 /* 3546 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3547 * You must update these if need. 3548 * OUT: 0: success. 3549 * !0: failure. 3550 * 3551 * does not modify mbuf. does not free mbuf on error. 3552 */ 3553 static int 3554 key_setsaval(struct secasvar *sav, struct mbuf *m, 3555 const struct sadb_msghdr *mhp) 3556 { 3557 int error = 0; 3558 3559 KASSERT(!cpu_softintr_p()); 3560 KASSERT(m != NULL); 3561 KASSERT(mhp != NULL); 3562 KASSERT(mhp->msg != NULL); 3563 3564 /* We shouldn't initialize sav variables while someone uses it. */ 3565 KASSERT(key_sa_refcnt(sav) == 0); 3566 3567 /* SA */ 3568 if (mhp->ext[SADB_EXT_SA] != NULL) { 3569 const struct sadb_sa *sa0; 3570 3571 sa0 = mhp->ext[SADB_EXT_SA]; 3572 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3573 error = EINVAL; 3574 goto fail; 3575 } 3576 3577 sav->alg_auth = sa0->sadb_sa_auth; 3578 sav->alg_enc = sa0->sadb_sa_encrypt; 3579 sav->flags = sa0->sadb_sa_flags; 3580 3581 /* replay window */ 3582 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3583 size_t len = sizeof(struct secreplay) + 3584 sa0->sadb_sa_replay; 3585 sav->replay = kmem_zalloc(len, KM_SLEEP); 3586 sav->replay_len = len; 3587 if (sa0->sadb_sa_replay != 0) 3588 sav->replay->bitmap = (char*)(sav->replay+1); 3589 sav->replay->wsize = sa0->sadb_sa_replay; 3590 } 3591 } 3592 3593 /* Authentication keys */ 3594 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3595 const struct sadb_key *key0; 3596 int len; 3597 3598 key0 = mhp->ext[SADB_EXT_KEY_AUTH]; 3599 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3600 3601 error = 0; 3602 if (len < sizeof(*key0)) { 3603 error = EINVAL; 3604 goto fail; 3605 } 3606 switch (mhp->msg->sadb_msg_satype) { 3607 case SADB_SATYPE_AH: 3608 case SADB_SATYPE_ESP: 3609 case SADB_X_SATYPE_TCPSIGNATURE: 3610 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3611 sav->alg_auth != SADB_X_AALG_NULL) 3612 error = EINVAL; 3613 break; 3614 case SADB_X_SATYPE_IPCOMP: 3615 default: 3616 error = EINVAL; 3617 break; 3618 } 3619 if (error) { 3620 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3621 goto fail; 3622 } 3623 3624 sav->key_auth = key_newbuf(key0, len); 3625 sav->key_auth_len = len; 3626 } 3627 3628 /* Encryption key */ 3629 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3630 const struct sadb_key *key0; 3631 int len; 3632 3633 key0 = mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3634 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3635 3636 error = 0; 3637 if (len < sizeof(*key0)) { 3638 error = EINVAL; 3639 goto fail; 3640 } 3641 switch (mhp->msg->sadb_msg_satype) { 3642 case SADB_SATYPE_ESP: 3643 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3644 sav->alg_enc != SADB_EALG_NULL) { 3645 error = EINVAL; 3646 break; 3647 } 3648 sav->key_enc = key_newbuf(key0, len); 3649 sav->key_enc_len = len; 3650 break; 3651 case SADB_X_SATYPE_IPCOMP: 3652 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3653 error = EINVAL; 3654 sav->key_enc = NULL; /*just in case*/ 3655 break; 3656 case SADB_SATYPE_AH: 3657 case SADB_X_SATYPE_TCPSIGNATURE: 3658 default: 3659 error = EINVAL; 3660 break; 3661 } 3662 if (error) { 3663 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3664 goto fail; 3665 } 3666 } 3667 3668 /* set iv */ 3669 sav->ivlen = 0; 3670 3671 switch (mhp->msg->sadb_msg_satype) { 3672 case SADB_SATYPE_AH: 3673 error = xform_init(sav, XF_AH); 3674 break; 3675 case SADB_SATYPE_ESP: 3676 error = xform_init(sav, XF_ESP); 3677 break; 3678 case SADB_X_SATYPE_IPCOMP: 3679 error = xform_init(sav, XF_IPCOMP); 3680 break; 3681 case SADB_X_SATYPE_TCPSIGNATURE: 3682 error = xform_init(sav, XF_TCPSIGNATURE); 3683 break; 3684 } 3685 if (error) { 3686 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3687 mhp->msg->sadb_msg_satype); 3688 goto fail; 3689 } 3690 3691 /* reset created */ 3692 sav->created = time_uptime; 3693 3694 /* make lifetime for CURRENT */ 3695 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3696 3697 sav->lft_c->sadb_lifetime_len = 3698 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3699 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3700 sav->lft_c->sadb_lifetime_allocations = 0; 3701 sav->lft_c->sadb_lifetime_bytes = 0; 3702 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3703 sav->lft_c->sadb_lifetime_usetime = 0; 3704 3705 sav->lft_c_counters_percpu = percpu_alloc(sizeof(lifetime_counters_t)); 3706 3707 /* lifetimes for HARD and SOFT */ 3708 { 3709 const struct sadb_lifetime *lft0; 3710 3711 lft0 = mhp->ext[SADB_EXT_LIFETIME_HARD]; 3712 if (lft0 != NULL) { 3713 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3714 error = EINVAL; 3715 goto fail; 3716 } 3717 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3718 } 3719 3720 lft0 = mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3721 if (lft0 != NULL) { 3722 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3723 error = EINVAL; 3724 goto fail; 3725 } 3726 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3727 /* to be initialize ? */ 3728 } 3729 } 3730 3731 return 0; 3732 3733 fail: 3734 key_clear_xform(sav); 3735 key_freesaval(sav); 3736 3737 return error; 3738 } 3739 3740 /* 3741 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3742 * OUT: 0: valid 3743 * other: errno 3744 */ 3745 static int 3746 key_init_xform(struct secasvar *sav) 3747 { 3748 int error; 3749 3750 /* We shouldn't initialize sav variables while someone uses it. */ 3751 KASSERT(key_sa_refcnt(sav) == 0); 3752 3753 /* check SPI value */ 3754 switch (sav->sah->saidx.proto) { 3755 case IPPROTO_ESP: 3756 case IPPROTO_AH: 3757 if (ntohl(sav->spi) <= 255) { 3758 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3759 (u_int32_t)ntohl(sav->spi)); 3760 return EINVAL; 3761 } 3762 break; 3763 } 3764 3765 /* check satype */ 3766 switch (sav->sah->saidx.proto) { 3767 case IPPROTO_ESP: 3768 /* check flags */ 3769 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3770 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3771 IPSECLOG(LOG_DEBUG, 3772 "invalid flag (derived) given to old-esp.\n"); 3773 return EINVAL; 3774 } 3775 error = xform_init(sav, XF_ESP); 3776 break; 3777 case IPPROTO_AH: 3778 /* check flags */ 3779 if (sav->flags & SADB_X_EXT_DERIV) { 3780 IPSECLOG(LOG_DEBUG, 3781 "invalid flag (derived) given to AH SA.\n"); 3782 return EINVAL; 3783 } 3784 if (sav->alg_enc != SADB_EALG_NONE) { 3785 IPSECLOG(LOG_DEBUG, 3786 "protocol and algorithm mismated.\n"); 3787 return(EINVAL); 3788 } 3789 error = xform_init(sav, XF_AH); 3790 break; 3791 case IPPROTO_IPCOMP: 3792 if (sav->alg_auth != SADB_AALG_NONE) { 3793 IPSECLOG(LOG_DEBUG, 3794 "protocol and algorithm mismated.\n"); 3795 return(EINVAL); 3796 } 3797 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3798 && ntohl(sav->spi) >= 0x10000) { 3799 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3800 return(EINVAL); 3801 } 3802 error = xform_init(sav, XF_IPCOMP); 3803 break; 3804 case IPPROTO_TCP: 3805 if (sav->alg_enc != SADB_EALG_NONE) { 3806 IPSECLOG(LOG_DEBUG, 3807 "protocol and algorithm mismated.\n"); 3808 return(EINVAL); 3809 } 3810 error = xform_init(sav, XF_TCPSIGNATURE); 3811 break; 3812 default: 3813 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3814 error = EPROTONOSUPPORT; 3815 break; 3816 } 3817 3818 return error; 3819 } 3820 3821 /* 3822 * subroutine for SADB_GET and SADB_DUMP. It never return NULL. 3823 */ 3824 static struct mbuf * 3825 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3826 u_int32_t seq, u_int32_t pid) 3827 { 3828 struct mbuf *result = NULL, *tres = NULL, *m; 3829 int l = 0; 3830 int i; 3831 void *p; 3832 struct sadb_lifetime lt; 3833 int dumporder[] = { 3834 SADB_EXT_SA, SADB_X_EXT_SA2, 3835 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3836 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3837 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3838 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3839 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3840 SADB_X_EXT_NAT_T_TYPE, 3841 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3842 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3843 SADB_X_EXT_NAT_T_FRAG, 3844 3845 }; 3846 3847 m = key_setsadbmsg(type, 0, satype, seq, pid, key_sa_refcnt(sav), M_WAITOK); 3848 result = m; 3849 3850 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3851 m = NULL; 3852 p = NULL; 3853 switch (dumporder[i]) { 3854 case SADB_EXT_SA: 3855 m = key_setsadbsa(sav); 3856 break; 3857 3858 case SADB_X_EXT_SA2: 3859 m = key_setsadbxsa2(sav->sah->saidx.mode, 3860 sav->replay ? sav->replay->count : 0, 3861 sav->sah->saidx.reqid); 3862 break; 3863 3864 case SADB_EXT_ADDRESS_SRC: 3865 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3866 &sav->sah->saidx.src.sa, 3867 FULLMASK, IPSEC_ULPROTO_ANY, M_WAITOK); 3868 break; 3869 3870 case SADB_EXT_ADDRESS_DST: 3871 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3872 &sav->sah->saidx.dst.sa, 3873 FULLMASK, IPSEC_ULPROTO_ANY, M_WAITOK); 3874 break; 3875 3876 case SADB_EXT_KEY_AUTH: 3877 if (!sav->key_auth) 3878 continue; 3879 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3880 p = sav->key_auth; 3881 break; 3882 3883 case SADB_EXT_KEY_ENCRYPT: 3884 if (!sav->key_enc) 3885 continue; 3886 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3887 p = sav->key_enc; 3888 break; 3889 3890 case SADB_EXT_LIFETIME_CURRENT: { 3891 lifetime_counters_t sum = {0}; 3892 3893 KASSERT(sav->lft_c != NULL); 3894 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3895 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3896 lt.sadb_lifetime_addtime = 3897 time_mono_to_wall(lt.sadb_lifetime_addtime); 3898 lt.sadb_lifetime_usetime = 3899 time_mono_to_wall(lt.sadb_lifetime_usetime); 3900 percpu_foreach(sav->lft_c_counters_percpu, 3901 key_sum_lifetime_counters, sum); 3902 lt.sadb_lifetime_allocations = 3903 sum[LIFETIME_COUNTER_ALLOCATIONS]; 3904 lt.sadb_lifetime_bytes = 3905 sum[LIFETIME_COUNTER_BYTES]; 3906 p = < 3907 break; 3908 } 3909 3910 case SADB_EXT_LIFETIME_HARD: 3911 if (!sav->lft_h) 3912 continue; 3913 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3914 p = sav->lft_h; 3915 break; 3916 3917 case SADB_EXT_LIFETIME_SOFT: 3918 if (!sav->lft_s) 3919 continue; 3920 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3921 p = sav->lft_s; 3922 break; 3923 3924 case SADB_X_EXT_NAT_T_TYPE: 3925 m = key_setsadbxtype(sav->natt_type); 3926 break; 3927 3928 case SADB_X_EXT_NAT_T_DPORT: 3929 if (sav->natt_type == 0) 3930 continue; 3931 m = key_setsadbxport( 3932 key_portfromsaddr(&sav->sah->saidx.dst), 3933 SADB_X_EXT_NAT_T_DPORT); 3934 break; 3935 3936 case SADB_X_EXT_NAT_T_SPORT: 3937 if (sav->natt_type == 0) 3938 continue; 3939 m = key_setsadbxport( 3940 key_portfromsaddr(&sav->sah->saidx.src), 3941 SADB_X_EXT_NAT_T_SPORT); 3942 break; 3943 3944 case SADB_X_EXT_NAT_T_FRAG: 3945 /* don't send frag info if not set */ 3946 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3947 continue; 3948 m = key_setsadbxfrag(sav->esp_frag); 3949 break; 3950 3951 case SADB_X_EXT_NAT_T_OAI: 3952 case SADB_X_EXT_NAT_T_OAR: 3953 continue; 3954 3955 case SADB_EXT_ADDRESS_PROXY: 3956 case SADB_EXT_IDENTITY_SRC: 3957 case SADB_EXT_IDENTITY_DST: 3958 /* XXX: should we brought from SPD ? */ 3959 case SADB_EXT_SENSITIVITY: 3960 default: 3961 continue; 3962 } 3963 3964 KASSERT(!(m && p)); 3965 KASSERT(m != NULL || p != NULL); 3966 if (p && tres) { 3967 M_PREPEND(tres, l, M_WAITOK); 3968 memcpy(mtod(tres, void *), p, l); 3969 continue; 3970 } 3971 if (p) { 3972 m = key_alloc_mbuf(l, M_WAITOK); 3973 m_copyback(m, 0, l, p); 3974 } 3975 3976 if (tres) 3977 m_cat(m, tres); 3978 tres = m; 3979 } 3980 3981 m_cat(result, tres); 3982 tres = NULL; /* avoid free on error below */ 3983 3984 KASSERT(result->m_len >= sizeof(struct sadb_msg)); 3985 3986 result->m_pkthdr.len = 0; 3987 for (m = result; m; m = m->m_next) 3988 result->m_pkthdr.len += m->m_len; 3989 3990 mtod(result, struct sadb_msg *)->sadb_msg_len = 3991 PFKEY_UNIT64(result->m_pkthdr.len); 3992 3993 return result; 3994 } 3995 3996 3997 /* 3998 * set a type in sadb_x_nat_t_type 3999 */ 4000 static struct mbuf * 4001 key_setsadbxtype(u_int16_t type) 4002 { 4003 struct mbuf *m; 4004 size_t len; 4005 struct sadb_x_nat_t_type *p; 4006 4007 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 4008 4009 m = key_alloc_mbuf(len, M_WAITOK); 4010 KASSERT(m->m_next == NULL); 4011 4012 p = mtod(m, struct sadb_x_nat_t_type *); 4013 4014 memset(p, 0, len); 4015 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 4016 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 4017 p->sadb_x_nat_t_type_type = type; 4018 4019 return m; 4020 } 4021 /* 4022 * set a port in sadb_x_nat_t_port. port is in network order 4023 */ 4024 static struct mbuf * 4025 key_setsadbxport(u_int16_t port, u_int16_t type) 4026 { 4027 struct mbuf *m; 4028 size_t len; 4029 struct sadb_x_nat_t_port *p; 4030 4031 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 4032 4033 m = key_alloc_mbuf(len, M_WAITOK); 4034 KASSERT(m->m_next == NULL); 4035 4036 p = mtod(m, struct sadb_x_nat_t_port *); 4037 4038 memset(p, 0, len); 4039 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 4040 p->sadb_x_nat_t_port_exttype = type; 4041 p->sadb_x_nat_t_port_port = port; 4042 4043 return m; 4044 } 4045 4046 /* 4047 * set fragmentation info in sadb_x_nat_t_frag 4048 */ 4049 static struct mbuf * 4050 key_setsadbxfrag(u_int16_t flen) 4051 { 4052 struct mbuf *m; 4053 size_t len; 4054 struct sadb_x_nat_t_frag *p; 4055 4056 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 4057 4058 m = key_alloc_mbuf(len, M_WAITOK); 4059 KASSERT(m->m_next == NULL); 4060 4061 p = mtod(m, struct sadb_x_nat_t_frag *); 4062 4063 memset(p, 0, len); 4064 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 4065 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 4066 p->sadb_x_nat_t_frag_fraglen = flen; 4067 4068 return m; 4069 } 4070 4071 /* 4072 * Get port from sockaddr, port is in network order 4073 */ 4074 u_int16_t 4075 key_portfromsaddr(const union sockaddr_union *saddr) 4076 { 4077 u_int16_t port; 4078 4079 switch (saddr->sa.sa_family) { 4080 case AF_INET: { 4081 port = saddr->sin.sin_port; 4082 break; 4083 } 4084 #ifdef INET6 4085 case AF_INET6: { 4086 port = saddr->sin6.sin6_port; 4087 break; 4088 } 4089 #endif 4090 default: 4091 printf("%s: unexpected address family\n", __func__); 4092 port = 0; 4093 break; 4094 } 4095 4096 return port; 4097 } 4098 4099 4100 /* 4101 * Set port is struct sockaddr. port is in network order 4102 */ 4103 static void 4104 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 4105 { 4106 switch (saddr->sa.sa_family) { 4107 case AF_INET: { 4108 saddr->sin.sin_port = port; 4109 break; 4110 } 4111 #ifdef INET6 4112 case AF_INET6: { 4113 saddr->sin6.sin6_port = port; 4114 break; 4115 } 4116 #endif 4117 default: 4118 printf("%s: unexpected address family %d\n", __func__, 4119 saddr->sa.sa_family); 4120 break; 4121 } 4122 4123 return; 4124 } 4125 4126 /* 4127 * Safety check sa_len 4128 */ 4129 static int 4130 key_checksalen(const union sockaddr_union *saddr) 4131 { 4132 switch (saddr->sa.sa_family) { 4133 case AF_INET: 4134 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 4135 return -1; 4136 break; 4137 #ifdef INET6 4138 case AF_INET6: 4139 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 4140 return -1; 4141 break; 4142 #endif 4143 default: 4144 printf("%s: unexpected sa_family %d\n", __func__, 4145 saddr->sa.sa_family); 4146 return -1; 4147 break; 4148 } 4149 return 0; 4150 } 4151 4152 4153 /* 4154 * set data into sadb_msg. 4155 */ 4156 static struct mbuf * 4157 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 4158 u_int32_t seq, pid_t pid, u_int16_t reserved, int mflag) 4159 { 4160 struct mbuf *m; 4161 struct sadb_msg *p; 4162 int len; 4163 4164 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 4165 4166 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4167 4168 m = key_alloc_mbuf_simple(len, mflag); 4169 if (!m) 4170 return NULL; 4171 m->m_pkthdr.len = m->m_len = len; 4172 m->m_next = NULL; 4173 4174 p = mtod(m, struct sadb_msg *); 4175 4176 memset(p, 0, len); 4177 p->sadb_msg_version = PF_KEY_V2; 4178 p->sadb_msg_type = type; 4179 p->sadb_msg_errno = 0; 4180 p->sadb_msg_satype = satype; 4181 p->sadb_msg_len = PFKEY_UNIT64(tlen); 4182 p->sadb_msg_reserved = reserved; 4183 p->sadb_msg_seq = seq; 4184 p->sadb_msg_pid = (u_int32_t)pid; 4185 4186 return m; 4187 } 4188 4189 /* 4190 * copy secasvar data into sadb_address. 4191 */ 4192 static struct mbuf * 4193 key_setsadbsa(struct secasvar *sav) 4194 { 4195 struct mbuf *m; 4196 struct sadb_sa *p; 4197 int len; 4198 4199 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4200 m = key_alloc_mbuf(len, M_WAITOK); 4201 KASSERT(m->m_next == NULL); 4202 4203 p = mtod(m, struct sadb_sa *); 4204 4205 memset(p, 0, len); 4206 p->sadb_sa_len = PFKEY_UNIT64(len); 4207 p->sadb_sa_exttype = SADB_EXT_SA; 4208 p->sadb_sa_spi = sav->spi; 4209 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 4210 p->sadb_sa_state = sav->state; 4211 p->sadb_sa_auth = sav->alg_auth; 4212 p->sadb_sa_encrypt = sav->alg_enc; 4213 p->sadb_sa_flags = sav->flags; 4214 4215 return m; 4216 } 4217 4218 /* 4219 * set data into sadb_address. 4220 */ 4221 static struct mbuf * 4222 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 4223 u_int8_t prefixlen, u_int16_t ul_proto, int mflag) 4224 { 4225 struct mbuf *m; 4226 struct sadb_address *p; 4227 size_t len; 4228 4229 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 4230 PFKEY_ALIGN8(saddr->sa_len); 4231 m = key_alloc_mbuf(len, mflag); 4232 if (!m || m->m_next) { /*XXX*/ 4233 if (m) 4234 m_freem(m); 4235 return NULL; 4236 } 4237 4238 p = mtod(m, struct sadb_address *); 4239 4240 memset(p, 0, len); 4241 p->sadb_address_len = PFKEY_UNIT64(len); 4242 p->sadb_address_exttype = exttype; 4243 p->sadb_address_proto = ul_proto; 4244 if (prefixlen == FULLMASK) { 4245 switch (saddr->sa_family) { 4246 case AF_INET: 4247 prefixlen = sizeof(struct in_addr) << 3; 4248 break; 4249 case AF_INET6: 4250 prefixlen = sizeof(struct in6_addr) << 3; 4251 break; 4252 default: 4253 ; /*XXX*/ 4254 } 4255 } 4256 p->sadb_address_prefixlen = prefixlen; 4257 p->sadb_address_reserved = 0; 4258 4259 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 4260 saddr, saddr->sa_len); 4261 4262 return m; 4263 } 4264 4265 #if 0 4266 /* 4267 * set data into sadb_ident. 4268 */ 4269 static struct mbuf * 4270 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 4271 void *string, int stringlen, u_int64_t id) 4272 { 4273 struct mbuf *m; 4274 struct sadb_ident *p; 4275 size_t len; 4276 4277 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 4278 m = key_alloc_mbuf(len); 4279 if (!m || m->m_next) { /*XXX*/ 4280 if (m) 4281 m_freem(m); 4282 return NULL; 4283 } 4284 4285 p = mtod(m, struct sadb_ident *); 4286 4287 memset(p, 0, len); 4288 p->sadb_ident_len = PFKEY_UNIT64(len); 4289 p->sadb_ident_exttype = exttype; 4290 p->sadb_ident_type = idtype; 4291 p->sadb_ident_reserved = 0; 4292 p->sadb_ident_id = id; 4293 4294 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 4295 string, stringlen); 4296 4297 return m; 4298 } 4299 #endif 4300 4301 /* 4302 * set data into sadb_x_sa2. 4303 */ 4304 static struct mbuf * 4305 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4306 { 4307 struct mbuf *m; 4308 struct sadb_x_sa2 *p; 4309 size_t len; 4310 4311 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4312 m = key_alloc_mbuf(len, M_WAITOK); 4313 KASSERT(m->m_next == NULL); 4314 4315 p = mtod(m, struct sadb_x_sa2 *); 4316 4317 memset(p, 0, len); 4318 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4319 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4320 p->sadb_x_sa2_mode = mode; 4321 p->sadb_x_sa2_reserved1 = 0; 4322 p->sadb_x_sa2_reserved2 = 0; 4323 p->sadb_x_sa2_sequence = seq; 4324 p->sadb_x_sa2_reqid = reqid; 4325 4326 return m; 4327 } 4328 4329 /* 4330 * set data into sadb_x_policy 4331 */ 4332 static struct mbuf * 4333 key_setsadbxpolicy(const u_int16_t type, const u_int8_t dir, const u_int32_t id, 4334 int mflag) 4335 { 4336 struct mbuf *m; 4337 struct sadb_x_policy *p; 4338 size_t len; 4339 4340 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4341 m = key_alloc_mbuf(len, mflag); 4342 if (!m || m->m_next) { /*XXX*/ 4343 if (m) 4344 m_freem(m); 4345 return NULL; 4346 } 4347 4348 p = mtod(m, struct sadb_x_policy *); 4349 4350 memset(p, 0, len); 4351 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4352 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4353 p->sadb_x_policy_type = type; 4354 p->sadb_x_policy_dir = dir; 4355 p->sadb_x_policy_id = id; 4356 4357 return m; 4358 } 4359 4360 /* %%% utilities */ 4361 /* 4362 * copy a buffer into the new buffer allocated. 4363 */ 4364 static void * 4365 key_newbuf(const void *src, u_int len) 4366 { 4367 void *new; 4368 4369 new = kmem_alloc(len, KM_SLEEP); 4370 memcpy(new, src, len); 4371 4372 return new; 4373 } 4374 4375 /* compare my own address 4376 * OUT: 1: true, i.e. my address. 4377 * 0: false 4378 */ 4379 int 4380 key_ismyaddr(const struct sockaddr *sa) 4381 { 4382 #ifdef INET 4383 const struct sockaddr_in *sin; 4384 const struct in_ifaddr *ia; 4385 int s; 4386 #endif 4387 4388 KASSERT(sa != NULL); 4389 4390 switch (sa->sa_family) { 4391 #ifdef INET 4392 case AF_INET: 4393 sin = (const struct sockaddr_in *)sa; 4394 s = pserialize_read_enter(); 4395 IN_ADDRLIST_READER_FOREACH(ia) { 4396 if (sin->sin_family == ia->ia_addr.sin_family && 4397 sin->sin_len == ia->ia_addr.sin_len && 4398 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4399 { 4400 pserialize_read_exit(s); 4401 return 1; 4402 } 4403 } 4404 pserialize_read_exit(s); 4405 break; 4406 #endif 4407 #ifdef INET6 4408 case AF_INET6: 4409 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4410 #endif 4411 } 4412 4413 return 0; 4414 } 4415 4416 #ifdef INET6 4417 /* 4418 * compare my own address for IPv6. 4419 * 1: ours 4420 * 0: other 4421 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4422 */ 4423 #include <netinet6/in6_var.h> 4424 4425 static int 4426 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4427 { 4428 struct in6_ifaddr *ia; 4429 int s; 4430 struct psref psref; 4431 int bound; 4432 int ours = 1; 4433 4434 bound = curlwp_bind(); 4435 s = pserialize_read_enter(); 4436 IN6_ADDRLIST_READER_FOREACH(ia) { 4437 bool ingroup; 4438 4439 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4440 (const struct sockaddr *)&ia->ia_addr, 0)) { 4441 pserialize_read_exit(s); 4442 goto ours; 4443 } 4444 ia6_acquire(ia, &psref); 4445 pserialize_read_exit(s); 4446 4447 /* 4448 * XXX Multicast 4449 * XXX why do we care about multlicast here while we don't care 4450 * about IPv4 multicast?? 4451 * XXX scope 4452 */ 4453 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4454 if (ingroup) { 4455 ia6_release(ia, &psref); 4456 goto ours; 4457 } 4458 4459 s = pserialize_read_enter(); 4460 ia6_release(ia, &psref); 4461 } 4462 pserialize_read_exit(s); 4463 4464 /* loopback, just for safety */ 4465 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4466 goto ours; 4467 4468 ours = 0; 4469 ours: 4470 curlwp_bindx(bound); 4471 4472 return ours; 4473 } 4474 #endif /*INET6*/ 4475 4476 /* 4477 * compare two secasindex structure. 4478 * flag can specify to compare 2 saidxes. 4479 * compare two secasindex structure without both mode and reqid. 4480 * don't compare port. 4481 * IN: 4482 * saidx0: source, it can be in SAD. 4483 * saidx1: object. 4484 * OUT: 4485 * 1 : equal 4486 * 0 : not equal 4487 */ 4488 static int 4489 key_saidx_match( 4490 const struct secasindex *saidx0, 4491 const struct secasindex *saidx1, 4492 int flag) 4493 { 4494 int chkport; 4495 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4496 4497 KASSERT(saidx0 != NULL); 4498 KASSERT(saidx1 != NULL); 4499 4500 /* sanity */ 4501 if (saidx0->proto != saidx1->proto) 4502 return 0; 4503 4504 if (flag == CMP_EXACTLY) { 4505 if (saidx0->mode != saidx1->mode) 4506 return 0; 4507 if (saidx0->reqid != saidx1->reqid) 4508 return 0; 4509 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4510 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4511 return 0; 4512 } else { 4513 4514 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4515 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4516 /* 4517 * If reqid of SPD is non-zero, unique SA is required. 4518 * The result must be of same reqid in this case. 4519 */ 4520 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4521 return 0; 4522 } 4523 4524 if (flag == CMP_MODE_REQID) { 4525 if (saidx0->mode != IPSEC_MODE_ANY && 4526 saidx0->mode != saidx1->mode) 4527 return 0; 4528 } 4529 4530 4531 sa0src = &saidx0->src.sa; 4532 sa0dst = &saidx0->dst.sa; 4533 sa1src = &saidx1->src.sa; 4534 sa1dst = &saidx1->dst.sa; 4535 /* 4536 * If NAT-T is enabled, check ports for tunnel mode. 4537 * Don't do it for transport mode, as there is no 4538 * port information available in the SP. 4539 * Also don't check ports if they are set to zero 4540 * in the SPD: This means we have a non-generated 4541 * SPD which can't know UDP ports. 4542 */ 4543 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4544 chkport = PORT_LOOSE; 4545 else 4546 chkport = PORT_NONE; 4547 4548 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4549 return 0; 4550 } 4551 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4552 return 0; 4553 } 4554 } 4555 4556 return 1; 4557 } 4558 4559 /* 4560 * compare two secindex structure exactly. 4561 * IN: 4562 * spidx0: source, it is often in SPD. 4563 * spidx1: object, it is often from PFKEY message. 4564 * OUT: 4565 * 1 : equal 4566 * 0 : not equal 4567 */ 4568 static int 4569 key_spidx_match_exactly( 4570 const struct secpolicyindex *spidx0, 4571 const struct secpolicyindex *spidx1) 4572 { 4573 4574 KASSERT(spidx0 != NULL); 4575 KASSERT(spidx1 != NULL); 4576 4577 /* sanity */ 4578 if (spidx0->prefs != spidx1->prefs || 4579 spidx0->prefd != spidx1->prefd || 4580 spidx0->ul_proto != spidx1->ul_proto) 4581 return 0; 4582 4583 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4584 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4585 } 4586 4587 /* 4588 * compare two secindex structure with mask. 4589 * IN: 4590 * spidx0: source, it is often in SPD. 4591 * spidx1: object, it is often from IP header. 4592 * OUT: 4593 * 1 : equal 4594 * 0 : not equal 4595 */ 4596 static int 4597 key_spidx_match_withmask( 4598 const struct secpolicyindex *spidx0, 4599 const struct secpolicyindex *spidx1) 4600 { 4601 4602 KASSERT(spidx0 != NULL); 4603 KASSERT(spidx1 != NULL); 4604 4605 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4606 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4607 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4608 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4609 return 0; 4610 4611 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4612 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4613 spidx0->ul_proto != spidx1->ul_proto) 4614 return 0; 4615 4616 switch (spidx0->src.sa.sa_family) { 4617 case AF_INET: 4618 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4619 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4620 return 0; 4621 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4622 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4623 return 0; 4624 break; 4625 case AF_INET6: 4626 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4627 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4628 return 0; 4629 /* 4630 * scope_id check. if sin6_scope_id is 0, we regard it 4631 * as a wildcard scope, which matches any scope zone ID. 4632 */ 4633 if (spidx0->src.sin6.sin6_scope_id && 4634 spidx1->src.sin6.sin6_scope_id && 4635 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4636 return 0; 4637 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4638 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4639 return 0; 4640 break; 4641 default: 4642 /* XXX */ 4643 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4644 return 0; 4645 break; 4646 } 4647 4648 switch (spidx0->dst.sa.sa_family) { 4649 case AF_INET: 4650 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4651 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4652 return 0; 4653 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4654 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4655 return 0; 4656 break; 4657 case AF_INET6: 4658 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4659 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4660 return 0; 4661 /* 4662 * scope_id check. if sin6_scope_id is 0, we regard it 4663 * as a wildcard scope, which matches any scope zone ID. 4664 */ 4665 if (spidx0->src.sin6.sin6_scope_id && 4666 spidx1->src.sin6.sin6_scope_id && 4667 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4668 return 0; 4669 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4670 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4671 return 0; 4672 break; 4673 default: 4674 /* XXX */ 4675 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4676 return 0; 4677 break; 4678 } 4679 4680 /* XXX Do we check other field ? e.g. flowinfo */ 4681 4682 return 1; 4683 } 4684 4685 /* returns 0 on match */ 4686 static int 4687 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4688 { 4689 switch (howport) { 4690 case PORT_NONE: 4691 return 0; 4692 case PORT_LOOSE: 4693 if (port1 == 0 || port2 == 0) 4694 return 0; 4695 /*FALLTHROUGH*/ 4696 case PORT_STRICT: 4697 if (port1 != port2) { 4698 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4699 "port fail %d != %d\n", port1, port2); 4700 return 1; 4701 } 4702 return 0; 4703 default: 4704 KASSERT(0); 4705 return 1; 4706 } 4707 } 4708 4709 /* returns 1 on match */ 4710 static int 4711 key_sockaddr_match( 4712 const struct sockaddr *sa1, 4713 const struct sockaddr *sa2, 4714 int howport) 4715 { 4716 const struct sockaddr_in *sin1, *sin2; 4717 const struct sockaddr_in6 *sin61, *sin62; 4718 char s1[IPSEC_ADDRSTRLEN], s2[IPSEC_ADDRSTRLEN]; 4719 4720 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4721 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4722 "fam/len fail %d != %d || %d != %d\n", 4723 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4724 sa2->sa_len); 4725 return 0; 4726 } 4727 4728 switch (sa1->sa_family) { 4729 case AF_INET: 4730 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4731 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4732 "len fail %d != %zu\n", 4733 sa1->sa_len, sizeof(struct sockaddr_in)); 4734 return 0; 4735 } 4736 sin1 = (const struct sockaddr_in *)sa1; 4737 sin2 = (const struct sockaddr_in *)sa2; 4738 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4739 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4740 "addr fail %s != %s\n", 4741 (in_print(s1, sizeof(s1), &sin1->sin_addr), s1), 4742 (in_print(s2, sizeof(s2), &sin2->sin_addr), s2)); 4743 return 0; 4744 } 4745 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4746 return 0; 4747 } 4748 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4749 "addr success %s[%d] == %s[%d]\n", 4750 (in_print(s1, sizeof(s1), &sin1->sin_addr), s1), 4751 sin1->sin_port, 4752 (in_print(s2, sizeof(s2), &sin2->sin_addr), s2), 4753 sin2->sin_port); 4754 break; 4755 case AF_INET6: 4756 sin61 = (const struct sockaddr_in6 *)sa1; 4757 sin62 = (const struct sockaddr_in6 *)sa2; 4758 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4759 return 0; /*EINVAL*/ 4760 4761 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4762 return 0; 4763 } 4764 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4765 return 0; 4766 } 4767 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4768 return 0; 4769 } 4770 break; 4771 default: 4772 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4773 return 0; 4774 break; 4775 } 4776 4777 return 1; 4778 } 4779 4780 /* 4781 * compare two buffers with mask. 4782 * IN: 4783 * addr1: source 4784 * addr2: object 4785 * bits: Number of bits to compare 4786 * OUT: 4787 * 1 : equal 4788 * 0 : not equal 4789 */ 4790 static int 4791 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4792 { 4793 const unsigned char *p1 = a1; 4794 const unsigned char *p2 = a2; 4795 4796 /* XXX: This could be considerably faster if we compare a word 4797 * at a time, but it is complicated on LSB Endian machines */ 4798 4799 /* Handle null pointers */ 4800 if (p1 == NULL || p2 == NULL) 4801 return (p1 == p2); 4802 4803 while (bits >= 8) { 4804 if (*p1++ != *p2++) 4805 return 0; 4806 bits -= 8; 4807 } 4808 4809 if (bits > 0) { 4810 u_int8_t mask = ~((1<<(8-bits))-1); 4811 if ((*p1 & mask) != (*p2 & mask)) 4812 return 0; 4813 } 4814 return 1; /* Match! */ 4815 } 4816 4817 static void 4818 key_timehandler_spd(time_t now) 4819 { 4820 u_int dir; 4821 struct secpolicy *sp; 4822 4823 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4824 retry: 4825 mutex_enter(&key_spd.lock); 4826 SPLIST_WRITER_FOREACH(sp, dir) { 4827 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 4828 4829 if (sp->lifetime == 0 && sp->validtime == 0) 4830 continue; 4831 4832 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4833 (sp->validtime && now - sp->lastused > sp->validtime)) { 4834 key_unlink_sp(sp); 4835 mutex_exit(&key_spd.lock); 4836 key_spdexpire(sp); 4837 key_destroy_sp(sp); 4838 goto retry; 4839 } 4840 } 4841 mutex_exit(&key_spd.lock); 4842 } 4843 4844 retry_socksplist: 4845 mutex_enter(&key_spd.lock); 4846 SOCKSPLIST_WRITER_FOREACH(sp) { 4847 if (sp->state != IPSEC_SPSTATE_DEAD) 4848 continue; 4849 4850 key_unlink_sp(sp); 4851 mutex_exit(&key_spd.lock); 4852 key_destroy_sp(sp); 4853 goto retry_socksplist; 4854 } 4855 mutex_exit(&key_spd.lock); 4856 } 4857 4858 static void 4859 key_timehandler_sad(time_t now) 4860 { 4861 struct secashead *sah; 4862 int s; 4863 4864 restart: 4865 mutex_enter(&key_sad.lock); 4866 SAHLIST_WRITER_FOREACH(sah) { 4867 /* If sah has been dead and has no sav, then delete it */ 4868 if (sah->state == SADB_SASTATE_DEAD && 4869 !key_sah_has_sav(sah)) { 4870 key_unlink_sah(sah); 4871 mutex_exit(&key_sad.lock); 4872 key_destroy_sah(sah); 4873 goto restart; 4874 } 4875 } 4876 mutex_exit(&key_sad.lock); 4877 4878 s = pserialize_read_enter(); 4879 SAHLIST_READER_FOREACH(sah) { 4880 struct secasvar *sav; 4881 4882 key_sah_ref(sah); 4883 pserialize_read_exit(s); 4884 4885 /* if LARVAL entry doesn't become MATURE, delete it. */ 4886 mutex_enter(&key_sad.lock); 4887 restart_sav_LARVAL: 4888 SAVLIST_WRITER_FOREACH(sav, sah, SADB_SASTATE_LARVAL) { 4889 if (now - sav->created > key_larval_lifetime) { 4890 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4891 goto restart_sav_LARVAL; 4892 } 4893 } 4894 mutex_exit(&key_sad.lock); 4895 4896 /* 4897 * check MATURE entry to start to send expire message 4898 * whether or not. 4899 */ 4900 restart_sav_MATURE: 4901 mutex_enter(&key_sad.lock); 4902 SAVLIST_WRITER_FOREACH(sav, sah, SADB_SASTATE_MATURE) { 4903 /* we don't need to check. */ 4904 if (sav->lft_s == NULL) 4905 continue; 4906 4907 /* sanity check */ 4908 KASSERT(sav->lft_c != NULL); 4909 4910 /* check SOFT lifetime */ 4911 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4912 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4913 /* 4914 * check SA to be used whether or not. 4915 * when SA hasn't been used, delete it. 4916 */ 4917 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4918 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4919 mutex_exit(&key_sad.lock); 4920 } else { 4921 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4922 mutex_exit(&key_sad.lock); 4923 /* 4924 * XXX If we keep to send expire 4925 * message in the status of 4926 * DYING. Do remove below code. 4927 */ 4928 key_expire(sav); 4929 } 4930 goto restart_sav_MATURE; 4931 } 4932 /* check SOFT lifetime by bytes */ 4933 /* 4934 * XXX I don't know the way to delete this SA 4935 * when new SA is installed. Caution when it's 4936 * installed too big lifetime by time. 4937 */ 4938 else { 4939 uint64_t lft_c_bytes = 0; 4940 lifetime_counters_t sum = {0}; 4941 4942 percpu_foreach(sav->lft_c_counters_percpu, 4943 key_sum_lifetime_counters, sum); 4944 lft_c_bytes = sum[LIFETIME_COUNTER_BYTES]; 4945 4946 if (sav->lft_s->sadb_lifetime_bytes == 0 || 4947 sav->lft_s->sadb_lifetime_bytes >= lft_c_bytes) 4948 continue; 4949 4950 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4951 mutex_exit(&key_sad.lock); 4952 /* 4953 * XXX If we keep to send expire 4954 * message in the status of 4955 * DYING. Do remove below code. 4956 */ 4957 key_expire(sav); 4958 goto restart_sav_MATURE; 4959 } 4960 } 4961 mutex_exit(&key_sad.lock); 4962 4963 /* check DYING entry to change status to DEAD. */ 4964 mutex_enter(&key_sad.lock); 4965 restart_sav_DYING: 4966 SAVLIST_WRITER_FOREACH(sav, sah, SADB_SASTATE_DYING) { 4967 /* we don't need to check. */ 4968 if (sav->lft_h == NULL) 4969 continue; 4970 4971 /* sanity check */ 4972 KASSERT(sav->lft_c != NULL); 4973 4974 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4975 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4976 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4977 goto restart_sav_DYING; 4978 } 4979 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4980 else if (sav->lft_s != NULL 4981 && sav->lft_s->sadb_lifetime_addtime != 0 4982 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4983 /* 4984 * XXX: should be checked to be 4985 * installed the valid SA. 4986 */ 4987 4988 /* 4989 * If there is no SA then sending 4990 * expire message. 4991 */ 4992 key_expire(sav); 4993 } 4994 #endif 4995 /* check HARD lifetime by bytes */ 4996 else { 4997 uint64_t lft_c_bytes = 0; 4998 lifetime_counters_t sum = {0}; 4999 5000 percpu_foreach(sav->lft_c_counters_percpu, 5001 key_sum_lifetime_counters, sum); 5002 lft_c_bytes = sum[LIFETIME_COUNTER_BYTES]; 5003 5004 if (sav->lft_h->sadb_lifetime_bytes == 0 || 5005 sav->lft_h->sadb_lifetime_bytes >= lft_c_bytes) 5006 continue; 5007 5008 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5009 goto restart_sav_DYING; 5010 } 5011 } 5012 mutex_exit(&key_sad.lock); 5013 5014 /* delete entry in DEAD */ 5015 restart_sav_DEAD: 5016 mutex_enter(&key_sad.lock); 5017 SAVLIST_WRITER_FOREACH(sav, sah, SADB_SASTATE_DEAD) { 5018 key_unlink_sav(sav); 5019 mutex_exit(&key_sad.lock); 5020 key_destroy_sav(sav); 5021 goto restart_sav_DEAD; 5022 } 5023 mutex_exit(&key_sad.lock); 5024 5025 s = pserialize_read_enter(); 5026 key_sah_unref(sah); 5027 } 5028 pserialize_read_exit(s); 5029 } 5030 5031 static void 5032 key_timehandler_acq(time_t now) 5033 { 5034 #ifndef IPSEC_NONBLOCK_ACQUIRE 5035 struct secacq *acq, *nextacq; 5036 5037 restart: 5038 mutex_enter(&key_misc.lock); 5039 LIST_FOREACH_SAFE(acq, &key_misc.acqlist, chain, nextacq) { 5040 if (now - acq->created > key_blockacq_lifetime) { 5041 LIST_REMOVE(acq, chain); 5042 mutex_exit(&key_misc.lock); 5043 kmem_free(acq, sizeof(*acq)); 5044 goto restart; 5045 } 5046 } 5047 mutex_exit(&key_misc.lock); 5048 #endif 5049 } 5050 5051 static void 5052 key_timehandler_spacq(time_t now) 5053 { 5054 #ifdef notyet 5055 struct secspacq *acq, *nextacq; 5056 5057 LIST_FOREACH_SAFE(acq, &key_misc.spacqlist, chain, nextacq) { 5058 if (now - acq->created > key_blockacq_lifetime) { 5059 KASSERT(__LIST_CHAINED(acq)); 5060 LIST_REMOVE(acq, chain); 5061 kmem_free(acq, sizeof(*acq)); 5062 } 5063 } 5064 #endif 5065 } 5066 5067 static unsigned int key_timehandler_work_enqueued = 0; 5068 5069 /* 5070 * time handler. 5071 * scanning SPD and SAD to check status for each entries, 5072 * and do to remove or to expire. 5073 */ 5074 static void 5075 key_timehandler_work(struct work *wk, void *arg) 5076 { 5077 time_t now = time_uptime; 5078 5079 /* We can allow enqueuing another work at this point */ 5080 atomic_swap_uint(&key_timehandler_work_enqueued, 0); 5081 5082 key_timehandler_spd(now); 5083 key_timehandler_sad(now); 5084 key_timehandler_acq(now); 5085 key_timehandler_spacq(now); 5086 5087 key_acquire_sendup_pending_mbuf(); 5088 5089 /* do exchange to tick time !! */ 5090 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 5091 5092 return; 5093 } 5094 5095 static void 5096 key_timehandler(void *arg) 5097 { 5098 5099 /* Avoid enqueuing another work when one is already enqueued */ 5100 if (atomic_swap_uint(&key_timehandler_work_enqueued, 1) == 1) 5101 return; 5102 5103 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 5104 } 5105 5106 u_long 5107 key_random(void) 5108 { 5109 u_long value; 5110 5111 key_randomfill(&value, sizeof(value)); 5112 return value; 5113 } 5114 5115 void 5116 key_randomfill(void *p, size_t l) 5117 { 5118 5119 cprng_fast(p, l); 5120 } 5121 5122 /* 5123 * map SADB_SATYPE_* to IPPROTO_*. 5124 * if satype == SADB_SATYPE then satype is mapped to ~0. 5125 * OUT: 5126 * 0: invalid satype. 5127 */ 5128 static u_int16_t 5129 key_satype2proto(u_int8_t satype) 5130 { 5131 switch (satype) { 5132 case SADB_SATYPE_UNSPEC: 5133 return IPSEC_PROTO_ANY; 5134 case SADB_SATYPE_AH: 5135 return IPPROTO_AH; 5136 case SADB_SATYPE_ESP: 5137 return IPPROTO_ESP; 5138 case SADB_X_SATYPE_IPCOMP: 5139 return IPPROTO_IPCOMP; 5140 case SADB_X_SATYPE_TCPSIGNATURE: 5141 return IPPROTO_TCP; 5142 default: 5143 return 0; 5144 } 5145 /* NOTREACHED */ 5146 } 5147 5148 /* 5149 * map IPPROTO_* to SADB_SATYPE_* 5150 * OUT: 5151 * 0: invalid protocol type. 5152 */ 5153 static u_int8_t 5154 key_proto2satype(u_int16_t proto) 5155 { 5156 switch (proto) { 5157 case IPPROTO_AH: 5158 return SADB_SATYPE_AH; 5159 case IPPROTO_ESP: 5160 return SADB_SATYPE_ESP; 5161 case IPPROTO_IPCOMP: 5162 return SADB_X_SATYPE_IPCOMP; 5163 case IPPROTO_TCP: 5164 return SADB_X_SATYPE_TCPSIGNATURE; 5165 default: 5166 return 0; 5167 } 5168 /* NOTREACHED */ 5169 } 5170 5171 static int 5172 key_setsecasidx(int proto, int mode, int reqid, 5173 const struct sockaddr *src, const struct sockaddr *dst, 5174 struct secasindex * saidx) 5175 { 5176 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 5177 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 5178 5179 /* sa len safety check */ 5180 if (key_checksalen(src_u) != 0) 5181 return -1; 5182 if (key_checksalen(dst_u) != 0) 5183 return -1; 5184 5185 memset(saidx, 0, sizeof(*saidx)); 5186 saidx->proto = proto; 5187 saidx->mode = mode; 5188 saidx->reqid = reqid; 5189 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 5190 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 5191 5192 key_porttosaddr(&((saidx)->src), 0); 5193 key_porttosaddr(&((saidx)->dst), 0); 5194 return 0; 5195 } 5196 5197 static void 5198 key_init_spidx_bymsghdr(struct secpolicyindex *spidx, 5199 const struct sadb_msghdr *mhp) 5200 { 5201 const struct sadb_address *src0, *dst0; 5202 const struct sockaddr *src, *dst; 5203 const struct sadb_x_policy *xpl0; 5204 5205 src0 = mhp->ext[SADB_EXT_ADDRESS_SRC]; 5206 dst0 = mhp->ext[SADB_EXT_ADDRESS_DST]; 5207 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5208 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5209 xpl0 = mhp->ext[SADB_X_EXT_POLICY]; 5210 5211 memset(spidx, 0, sizeof(*spidx)); 5212 spidx->dir = xpl0->sadb_x_policy_dir; 5213 spidx->prefs = src0->sadb_address_prefixlen; 5214 spidx->prefd = dst0->sadb_address_prefixlen; 5215 spidx->ul_proto = src0->sadb_address_proto; 5216 /* XXX boundary check against sa_len */ 5217 memcpy(&spidx->src, src, src->sa_len); 5218 memcpy(&spidx->dst, dst, dst->sa_len); 5219 } 5220 5221 /* %%% PF_KEY */ 5222 /* 5223 * SADB_GETSPI processing is to receive 5224 * <base, (SA2), src address, dst address, (SPI range)> 5225 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 5226 * tree with the status of LARVAL, and send 5227 * <base, SA(*), address(SD)> 5228 * to the IKMPd. 5229 * 5230 * IN: mhp: pointer to the pointer to each header. 5231 * OUT: NULL if fail. 5232 * other if success, return pointer to the message to send. 5233 */ 5234 static int 5235 key_api_getspi(struct socket *so, struct mbuf *m, 5236 const struct sadb_msghdr *mhp) 5237 { 5238 const struct sockaddr *src, *dst; 5239 struct secasindex saidx; 5240 struct secashead *sah; 5241 struct secasvar *newsav; 5242 u_int8_t proto; 5243 u_int32_t spi; 5244 u_int8_t mode; 5245 u_int16_t reqid; 5246 int error; 5247 5248 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5249 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5250 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5251 return key_senderror(so, m, EINVAL); 5252 } 5253 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5254 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5255 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5256 return key_senderror(so, m, EINVAL); 5257 } 5258 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5259 const struct sadb_x_sa2 *sa2 = mhp->ext[SADB_X_EXT_SA2]; 5260 mode = sa2->sadb_x_sa2_mode; 5261 reqid = sa2->sadb_x_sa2_reqid; 5262 } else { 5263 mode = IPSEC_MODE_ANY; 5264 reqid = 0; 5265 } 5266 5267 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5268 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5269 5270 /* map satype to proto */ 5271 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5272 if (proto == 0) { 5273 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5274 return key_senderror(so, m, EINVAL); 5275 } 5276 5277 5278 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5279 if (error != 0) 5280 return key_senderror(so, m, EINVAL); 5281 5282 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5283 if (error != 0) 5284 return key_senderror(so, m, EINVAL); 5285 5286 /* SPI allocation */ 5287 spi = key_do_getnewspi(mhp->ext[SADB_EXT_SPIRANGE], &saidx); 5288 if (spi == 0) 5289 return key_senderror(so, m, EINVAL); 5290 5291 /* get a SA index */ 5292 sah = key_getsah_ref(&saidx, CMP_REQID); 5293 if (sah == NULL) { 5294 /* create a new SA index */ 5295 sah = key_newsah(&saidx); 5296 if (sah == NULL) { 5297 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5298 return key_senderror(so, m, ENOBUFS); 5299 } 5300 } 5301 5302 /* get a new SA */ 5303 /* XXX rewrite */ 5304 newsav = KEY_NEWSAV(m, mhp, &error); 5305 if (newsav == NULL) { 5306 key_sah_unref(sah); 5307 /* XXX don't free new SA index allocated in above. */ 5308 return key_senderror(so, m, error); 5309 } 5310 5311 /* set spi */ 5312 newsav->spi = htonl(spi); 5313 5314 /* Add to sah#savlist */ 5315 key_init_sav(newsav); 5316 newsav->sah = sah; 5317 newsav->state = SADB_SASTATE_LARVAL; 5318 mutex_enter(&key_sad.lock); 5319 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_LARVAL, newsav); 5320 mutex_exit(&key_sad.lock); 5321 key_validate_savlist(sah, SADB_SASTATE_LARVAL); 5322 5323 key_sah_unref(sah); 5324 5325 #ifndef IPSEC_NONBLOCK_ACQUIRE 5326 /* delete the entry in key_misc.acqlist */ 5327 if (mhp->msg->sadb_msg_seq != 0) { 5328 struct secacq *acq; 5329 mutex_enter(&key_misc.lock); 5330 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 5331 if (acq != NULL) { 5332 /* reset counter in order to deletion by timehandler. */ 5333 acq->created = time_uptime; 5334 acq->count = 0; 5335 } 5336 mutex_exit(&key_misc.lock); 5337 } 5338 #endif 5339 5340 { 5341 struct mbuf *n, *nn; 5342 struct sadb_sa *m_sa; 5343 int off, len; 5344 5345 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5346 PFKEY_ALIGN8(sizeof(struct sadb_sa)) <= MCLBYTES); 5347 5348 /* create new sadb_msg to reply. */ 5349 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5350 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5351 5352 n = key_alloc_mbuf_simple(len, M_WAITOK); 5353 n->m_len = len; 5354 n->m_next = NULL; 5355 off = 0; 5356 5357 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 5358 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 5359 5360 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 5361 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 5362 m_sa->sadb_sa_exttype = SADB_EXT_SA; 5363 m_sa->sadb_sa_spi = htonl(spi); 5364 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5365 5366 KASSERTMSG(off == len, "length inconsistency"); 5367 5368 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5369 SADB_EXT_ADDRESS_DST); 5370 5371 KASSERT(n->m_len >= sizeof(struct sadb_msg)); 5372 5373 n->m_pkthdr.len = 0; 5374 for (nn = n; nn; nn = nn->m_next) 5375 n->m_pkthdr.len += nn->m_len; 5376 5377 key_fill_replymsg(n, newsav->seq); 5378 m_freem(m); 5379 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5380 } 5381 } 5382 5383 /* 5384 * allocating new SPI 5385 * called by key_api_getspi(). 5386 * OUT: 5387 * 0: failure. 5388 * others: success. 5389 */ 5390 static u_int32_t 5391 key_do_getnewspi(const struct sadb_spirange *spirange, 5392 const struct secasindex *saidx) 5393 { 5394 u_int32_t newspi; 5395 u_int32_t spmin, spmax; 5396 int count = key_spi_trycnt; 5397 5398 /* set spi range to allocate */ 5399 if (spirange != NULL) { 5400 spmin = spirange->sadb_spirange_min; 5401 spmax = spirange->sadb_spirange_max; 5402 } else { 5403 spmin = key_spi_minval; 5404 spmax = key_spi_maxval; 5405 } 5406 /* IPCOMP needs 2-byte SPI */ 5407 if (saidx->proto == IPPROTO_IPCOMP) { 5408 u_int32_t t; 5409 if (spmin >= 0x10000) 5410 spmin = 0xffff; 5411 if (spmax >= 0x10000) 5412 spmax = 0xffff; 5413 if (spmin > spmax) { 5414 t = spmin; spmin = spmax; spmax = t; 5415 } 5416 } 5417 5418 if (spmin == spmax) { 5419 if (key_checkspidup(saidx, htonl(spmin))) { 5420 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 5421 return 0; 5422 } 5423 5424 count--; /* taking one cost. */ 5425 newspi = spmin; 5426 5427 } else { 5428 5429 /* init SPI */ 5430 newspi = 0; 5431 5432 /* when requesting to allocate spi ranged */ 5433 while (count--) { 5434 /* generate pseudo-random SPI value ranged. */ 5435 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5436 5437 if (!key_checkspidup(saidx, htonl(newspi))) 5438 break; 5439 } 5440 5441 if (count == 0 || newspi == 0) { 5442 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5443 return 0; 5444 } 5445 } 5446 5447 /* statistics */ 5448 keystat.getspi_count = 5449 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5450 5451 return newspi; 5452 } 5453 5454 static int 5455 key_handle_natt_info(struct secasvar *sav, 5456 const struct sadb_msghdr *mhp) 5457 { 5458 const char *msg = "?" ; 5459 struct sadb_x_nat_t_type *type; 5460 struct sadb_x_nat_t_port *sport, *dport; 5461 struct sadb_address *iaddr, *raddr; 5462 struct sadb_x_nat_t_frag *frag; 5463 5464 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5465 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5466 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5467 return 0; 5468 5469 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5470 msg = "TYPE"; 5471 goto bad; 5472 } 5473 5474 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5475 msg = "SPORT"; 5476 goto bad; 5477 } 5478 5479 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5480 msg = "DPORT"; 5481 goto bad; 5482 } 5483 5484 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5485 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5486 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5487 msg = "OAI"; 5488 goto bad; 5489 } 5490 } 5491 5492 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5493 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5494 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5495 msg = "OAR"; 5496 goto bad; 5497 } 5498 } 5499 5500 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5501 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5502 msg = "FRAG"; 5503 goto bad; 5504 } 5505 } 5506 5507 type = mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5508 sport = mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5509 dport = mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5510 iaddr = mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5511 raddr = mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5512 frag = mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5513 5514 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5515 type->sadb_x_nat_t_type_type, 5516 ntohs(sport->sadb_x_nat_t_port_port), 5517 ntohs(dport->sadb_x_nat_t_port_port)); 5518 5519 sav->natt_type = type->sadb_x_nat_t_type_type; 5520 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5521 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5522 if (frag) 5523 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5524 else 5525 sav->esp_frag = IP_MAXPACKET; 5526 5527 return 0; 5528 bad: 5529 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5530 __USE(msg); 5531 return -1; 5532 } 5533 5534 /* Just update the IPSEC_NAT_T ports if present */ 5535 static int 5536 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5537 const struct sadb_msghdr *mhp) 5538 { 5539 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5540 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5541 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5542 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5543 5544 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5545 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5546 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5547 struct sadb_x_nat_t_type *type; 5548 struct sadb_x_nat_t_port *sport; 5549 struct sadb_x_nat_t_port *dport; 5550 5551 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5552 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5553 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5554 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5555 return -1; 5556 } 5557 5558 type = mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5559 sport = mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5560 dport = mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5561 5562 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5563 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5564 5565 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5566 type->sadb_x_nat_t_type_type, 5567 ntohs(sport->sadb_x_nat_t_port_port), 5568 ntohs(dport->sadb_x_nat_t_port_port)); 5569 } 5570 5571 return 0; 5572 } 5573 5574 5575 /* 5576 * SADB_UPDATE processing 5577 * receive 5578 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5579 * key(AE), (identity(SD),) (sensitivity)> 5580 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5581 * and send 5582 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5583 * (identity(SD),) (sensitivity)> 5584 * to the ikmpd. 5585 * 5586 * m will always be freed. 5587 */ 5588 static int 5589 key_api_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5590 { 5591 struct sadb_sa *sa0; 5592 const struct sockaddr *src, *dst; 5593 struct secasindex saidx; 5594 struct secashead *sah; 5595 struct secasvar *sav, *newsav; 5596 u_int16_t proto; 5597 u_int8_t mode; 5598 u_int16_t reqid; 5599 int error; 5600 5601 /* map satype to proto */ 5602 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5603 if (proto == 0) { 5604 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5605 return key_senderror(so, m, EINVAL); 5606 } 5607 5608 if (mhp->ext[SADB_EXT_SA] == NULL || 5609 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5610 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5611 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5612 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5613 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5614 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5615 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5616 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5617 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5618 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5619 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5620 return key_senderror(so, m, EINVAL); 5621 } 5622 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5623 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5624 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5625 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5626 return key_senderror(so, m, EINVAL); 5627 } 5628 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5629 const struct sadb_x_sa2 *sa2 = mhp->ext[SADB_X_EXT_SA2]; 5630 mode = sa2->sadb_x_sa2_mode; 5631 reqid = sa2->sadb_x_sa2_reqid; 5632 } else { 5633 mode = IPSEC_MODE_ANY; 5634 reqid = 0; 5635 } 5636 /* XXX boundary checking for other extensions */ 5637 5638 sa0 = mhp->ext[SADB_EXT_SA]; 5639 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5640 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5641 5642 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5643 if (error != 0) 5644 return key_senderror(so, m, EINVAL); 5645 5646 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5647 if (error != 0) 5648 return key_senderror(so, m, EINVAL); 5649 5650 /* get a SA header */ 5651 sah = key_getsah_ref(&saidx, CMP_REQID); 5652 if (sah == NULL) { 5653 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5654 return key_senderror(so, m, ENOENT); 5655 } 5656 5657 /* set spidx if there */ 5658 /* XXX rewrite */ 5659 error = key_setident(sah, m, mhp); 5660 if (error) 5661 goto error_sah; 5662 5663 /* find a SA with sequence number. */ 5664 #ifdef IPSEC_DOSEQCHECK 5665 if (mhp->msg->sadb_msg_seq != 0) { 5666 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5667 if (sav == NULL) { 5668 IPSECLOG(LOG_DEBUG, 5669 "no larval SA with sequence %u exists.\n", 5670 mhp->msg->sadb_msg_seq); 5671 error = ENOENT; 5672 goto error_sah; 5673 } 5674 } 5675 #else 5676 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5677 if (sav == NULL) { 5678 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5679 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5680 error = EINVAL; 5681 goto error_sah; 5682 } 5683 #endif 5684 5685 /* validity check */ 5686 if (sav->sah->saidx.proto != proto) { 5687 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5688 sav->sah->saidx.proto, proto); 5689 error = EINVAL; 5690 goto error; 5691 } 5692 #ifdef IPSEC_DOSEQCHECK 5693 if (sav->spi != sa0->sadb_sa_spi) { 5694 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5695 (u_int32_t)ntohl(sav->spi), 5696 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5697 error = EINVAL; 5698 goto error; 5699 } 5700 #endif 5701 if (sav->pid != mhp->msg->sadb_msg_pid) { 5702 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5703 sav->pid, mhp->msg->sadb_msg_pid); 5704 error = EINVAL; 5705 goto error; 5706 } 5707 5708 /* 5709 * Allocate a new SA instead of modifying the existing SA directly 5710 * to avoid race conditions. 5711 */ 5712 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 5713 5714 /* copy sav values */ 5715 newsav->spi = sav->spi; 5716 newsav->seq = sav->seq; 5717 newsav->created = sav->created; 5718 newsav->pid = sav->pid; 5719 newsav->sah = sav->sah; 5720 5721 error = key_setsaval(newsav, m, mhp); 5722 if (error) { 5723 key_delsav(newsav); 5724 goto error; 5725 } 5726 5727 error = key_handle_natt_info(newsav, mhp); 5728 if (error != 0) { 5729 key_delsav(newsav); 5730 goto error; 5731 } 5732 5733 error = key_init_xform(newsav); 5734 if (error != 0) { 5735 key_delsav(newsav); 5736 goto error; 5737 } 5738 5739 /* Add to sah#savlist */ 5740 key_init_sav(newsav); 5741 newsav->state = SADB_SASTATE_MATURE; 5742 mutex_enter(&key_sad.lock); 5743 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_MATURE, newsav); 5744 SAVLUT_WRITER_INSERT_HEAD(newsav); 5745 mutex_exit(&key_sad.lock); 5746 key_validate_savlist(sah, SADB_SASTATE_MATURE); 5747 5748 key_sah_unref(sah); 5749 sah = NULL; 5750 5751 key_destroy_sav_with_ref(sav); 5752 sav = NULL; 5753 5754 { 5755 struct mbuf *n; 5756 5757 /* set msg buf from mhp */ 5758 n = key_getmsgbuf_x1(m, mhp); 5759 if (n == NULL) { 5760 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5761 return key_senderror(so, m, ENOBUFS); 5762 } 5763 5764 m_freem(m); 5765 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5766 } 5767 error: 5768 KEY_SA_UNREF(&sav); 5769 error_sah: 5770 key_sah_unref(sah); 5771 return key_senderror(so, m, error); 5772 } 5773 5774 /* 5775 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5776 * only called by key_api_update(). 5777 * OUT: 5778 * NULL : not found 5779 * others : found, pointer to a SA. 5780 */ 5781 #ifdef IPSEC_DOSEQCHECK 5782 static struct secasvar * 5783 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5784 { 5785 struct secasvar *sav; 5786 u_int state; 5787 int s; 5788 5789 state = SADB_SASTATE_LARVAL; 5790 5791 /* search SAD with sequence number ? */ 5792 s = pserialize_read_enter(); 5793 SAVLIST_READER_FOREACH(sav, sah, state) { 5794 KEY_CHKSASTATE(state, sav->state); 5795 5796 if (sav->seq == seq) { 5797 SA_ADDREF(sav); 5798 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5799 "DP cause refcnt++:%d SA:%p\n", 5800 key_sa_refcnt(sav), sav); 5801 break; 5802 } 5803 } 5804 pserialize_read_exit(s); 5805 5806 return sav; 5807 } 5808 #endif 5809 5810 /* 5811 * SADB_ADD processing 5812 * add an entry to SA database, when received 5813 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5814 * key(AE), (identity(SD),) (sensitivity)> 5815 * from the ikmpd, 5816 * and send 5817 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5818 * (identity(SD),) (sensitivity)> 5819 * to the ikmpd. 5820 * 5821 * IGNORE identity and sensitivity messages. 5822 * 5823 * m will always be freed. 5824 */ 5825 static int 5826 key_api_add(struct socket *so, struct mbuf *m, 5827 const struct sadb_msghdr *mhp) 5828 { 5829 struct sadb_sa *sa0; 5830 const struct sockaddr *src, *dst; 5831 struct secasindex saidx; 5832 struct secashead *sah; 5833 struct secasvar *newsav; 5834 u_int16_t proto; 5835 u_int8_t mode; 5836 u_int16_t reqid; 5837 int error; 5838 5839 /* map satype to proto */ 5840 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5841 if (proto == 0) { 5842 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5843 return key_senderror(so, m, EINVAL); 5844 } 5845 5846 if (mhp->ext[SADB_EXT_SA] == NULL || 5847 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5848 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5849 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5850 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5851 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5852 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5853 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5854 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5855 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5856 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5857 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5858 return key_senderror(so, m, EINVAL); 5859 } 5860 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5861 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5862 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5863 /* XXX need more */ 5864 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5865 return key_senderror(so, m, EINVAL); 5866 } 5867 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5868 const struct sadb_x_sa2 *sa2 = mhp->ext[SADB_X_EXT_SA2]; 5869 mode = sa2->sadb_x_sa2_mode; 5870 reqid = sa2->sadb_x_sa2_reqid; 5871 } else { 5872 mode = IPSEC_MODE_ANY; 5873 reqid = 0; 5874 } 5875 5876 sa0 = mhp->ext[SADB_EXT_SA]; 5877 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5878 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5879 5880 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5881 if (error != 0) 5882 return key_senderror(so, m, EINVAL); 5883 5884 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5885 if (error != 0) 5886 return key_senderror(so, m, EINVAL); 5887 5888 /* get a SA header */ 5889 sah = key_getsah_ref(&saidx, CMP_REQID); 5890 if (sah == NULL) { 5891 /* create a new SA header */ 5892 sah = key_newsah(&saidx); 5893 if (sah == NULL) { 5894 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5895 return key_senderror(so, m, ENOBUFS); 5896 } 5897 } 5898 5899 /* set spidx if there */ 5900 /* XXX rewrite */ 5901 error = key_setident(sah, m, mhp); 5902 if (error) 5903 goto error; 5904 5905 { 5906 struct secasvar *sav; 5907 5908 /* We can create new SA only if SPI is differenct. */ 5909 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5910 if (sav != NULL) { 5911 KEY_SA_UNREF(&sav); 5912 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5913 error = EEXIST; 5914 goto error; 5915 } 5916 } 5917 5918 /* create new SA entry. */ 5919 newsav = KEY_NEWSAV(m, mhp, &error); 5920 if (newsav == NULL) 5921 goto error; 5922 newsav->sah = sah; 5923 5924 error = key_handle_natt_info(newsav, mhp); 5925 if (error != 0) { 5926 key_delsav(newsav); 5927 error = EINVAL; 5928 goto error; 5929 } 5930 5931 error = key_init_xform(newsav); 5932 if (error != 0) { 5933 key_delsav(newsav); 5934 goto error; 5935 } 5936 5937 /* Add to sah#savlist */ 5938 key_init_sav(newsav); 5939 newsav->state = SADB_SASTATE_MATURE; 5940 mutex_enter(&key_sad.lock); 5941 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_MATURE, newsav); 5942 SAVLUT_WRITER_INSERT_HEAD(newsav); 5943 mutex_exit(&key_sad.lock); 5944 key_validate_savlist(sah, SADB_SASTATE_MATURE); 5945 5946 key_sah_unref(sah); 5947 sah = NULL; 5948 5949 /* 5950 * don't call key_freesav() here, as we would like to keep the SA 5951 * in the database on success. 5952 */ 5953 5954 { 5955 struct mbuf *n; 5956 5957 /* set msg buf from mhp */ 5958 n = key_getmsgbuf_x1(m, mhp); 5959 if (n == NULL) { 5960 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5961 return key_senderror(so, m, ENOBUFS); 5962 } 5963 5964 m_freem(m); 5965 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5966 } 5967 error: 5968 key_sah_unref(sah); 5969 return key_senderror(so, m, error); 5970 } 5971 5972 /* m is retained */ 5973 static int 5974 key_setident(struct secashead *sah, struct mbuf *m, 5975 const struct sadb_msghdr *mhp) 5976 { 5977 const struct sadb_ident *idsrc, *iddst; 5978 int idsrclen, iddstlen; 5979 5980 KASSERT(!cpu_softintr_p()); 5981 KASSERT(sah != NULL); 5982 KASSERT(m != NULL); 5983 KASSERT(mhp != NULL); 5984 KASSERT(mhp->msg != NULL); 5985 5986 /* 5987 * Can be called with an existing sah from key_api_update(). 5988 */ 5989 if (sah->idents != NULL) { 5990 kmem_free(sah->idents, sah->idents_len); 5991 sah->idents = NULL; 5992 sah->idents_len = 0; 5993 } 5994 if (sah->identd != NULL) { 5995 kmem_free(sah->identd, sah->identd_len); 5996 sah->identd = NULL; 5997 sah->identd_len = 0; 5998 } 5999 6000 /* don't make buffer if not there */ 6001 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 6002 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 6003 sah->idents = NULL; 6004 sah->identd = NULL; 6005 return 0; 6006 } 6007 6008 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 6009 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 6010 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 6011 return EINVAL; 6012 } 6013 6014 idsrc = mhp->ext[SADB_EXT_IDENTITY_SRC]; 6015 iddst = mhp->ext[SADB_EXT_IDENTITY_DST]; 6016 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 6017 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 6018 6019 /* validity check */ 6020 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 6021 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 6022 return EINVAL; 6023 } 6024 6025 switch (idsrc->sadb_ident_type) { 6026 case SADB_IDENTTYPE_PREFIX: 6027 case SADB_IDENTTYPE_FQDN: 6028 case SADB_IDENTTYPE_USERFQDN: 6029 default: 6030 /* XXX do nothing */ 6031 sah->idents = NULL; 6032 sah->identd = NULL; 6033 return 0; 6034 } 6035 6036 /* make structure */ 6037 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 6038 sah->idents_len = idsrclen; 6039 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 6040 sah->identd_len = iddstlen; 6041 memcpy(sah->idents, idsrc, idsrclen); 6042 memcpy(sah->identd, iddst, iddstlen); 6043 6044 return 0; 6045 } 6046 6047 /* 6048 * m will not be freed on return. It never return NULL. 6049 * it is caller's responsibility to free the result. 6050 */ 6051 static struct mbuf * 6052 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 6053 { 6054 struct mbuf *n; 6055 6056 KASSERT(m != NULL); 6057 KASSERT(mhp != NULL); 6058 KASSERT(mhp->msg != NULL); 6059 6060 /* create new sadb_msg to reply. */ 6061 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 6062 SADB_EXT_SA, SADB_X_EXT_SA2, 6063 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 6064 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 6065 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 6066 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 6067 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 6068 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 6069 6070 KASSERT(n->m_len >= sizeof(struct sadb_msg)); 6071 6072 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 6073 mtod(n, struct sadb_msg *)->sadb_msg_len = 6074 PFKEY_UNIT64(n->m_pkthdr.len); 6075 6076 return n; 6077 } 6078 6079 static int key_delete_all (struct socket *, struct mbuf *, 6080 const struct sadb_msghdr *, u_int16_t); 6081 6082 /* 6083 * SADB_DELETE processing 6084 * receive 6085 * <base, SA(*), address(SD)> 6086 * from the ikmpd, and set SADB_SASTATE_DEAD, 6087 * and send, 6088 * <base, SA(*), address(SD)> 6089 * to the ikmpd. 6090 * 6091 * m will always be freed. 6092 */ 6093 static int 6094 key_api_delete(struct socket *so, struct mbuf *m, 6095 const struct sadb_msghdr *mhp) 6096 { 6097 struct sadb_sa *sa0; 6098 const struct sockaddr *src, *dst; 6099 struct secasindex saidx; 6100 struct secashead *sah; 6101 struct secasvar *sav = NULL; 6102 u_int16_t proto; 6103 int error; 6104 6105 /* map satype to proto */ 6106 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6107 if (proto == 0) { 6108 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6109 return key_senderror(so, m, EINVAL); 6110 } 6111 6112 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6113 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 6114 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6115 return key_senderror(so, m, EINVAL); 6116 } 6117 6118 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6119 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 6120 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6121 return key_senderror(so, m, EINVAL); 6122 } 6123 6124 if (mhp->ext[SADB_EXT_SA] == NULL) { 6125 /* 6126 * Caller wants us to delete all non-LARVAL SAs 6127 * that match the src/dst. This is used during 6128 * IKE INITIAL-CONTACT. 6129 */ 6130 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 6131 return key_delete_all(so, m, mhp, proto); 6132 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 6133 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6134 return key_senderror(so, m, EINVAL); 6135 } 6136 6137 sa0 = mhp->ext[SADB_EXT_SA]; 6138 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6139 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6140 6141 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6142 if (error != 0) 6143 return key_senderror(so, m, EINVAL); 6144 6145 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6146 if (error != 0) 6147 return key_senderror(so, m, EINVAL); 6148 6149 /* get a SA header */ 6150 sah = key_getsah_ref(&saidx, CMP_HEAD); 6151 if (sah != NULL) { 6152 /* get a SA with SPI. */ 6153 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 6154 key_sah_unref(sah); 6155 } 6156 6157 if (sav == NULL) { 6158 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 6159 return key_senderror(so, m, ENOENT); 6160 } 6161 6162 key_destroy_sav_with_ref(sav); 6163 sav = NULL; 6164 6165 { 6166 struct mbuf *n; 6167 6168 /* create new sadb_msg to reply. */ 6169 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 6170 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 6171 6172 key_fill_replymsg(n, 0); 6173 m_freem(m); 6174 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 6175 } 6176 } 6177 6178 /* 6179 * delete all SAs for src/dst. Called from key_api_delete(). 6180 */ 6181 static int 6182 key_delete_all(struct socket *so, struct mbuf *m, 6183 const struct sadb_msghdr *mhp, u_int16_t proto) 6184 { 6185 const struct sockaddr *src, *dst; 6186 struct secasindex saidx; 6187 struct secashead *sah; 6188 struct secasvar *sav; 6189 u_int state; 6190 int error; 6191 6192 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6193 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6194 6195 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6196 if (error != 0) 6197 return key_senderror(so, m, EINVAL); 6198 6199 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6200 if (error != 0) 6201 return key_senderror(so, m, EINVAL); 6202 6203 sah = key_getsah_ref(&saidx, CMP_HEAD); 6204 if (sah != NULL) { 6205 /* Delete all non-LARVAL SAs. */ 6206 SASTATE_ALIVE_FOREACH(state) { 6207 if (state == SADB_SASTATE_LARVAL) 6208 continue; 6209 restart: 6210 mutex_enter(&key_sad.lock); 6211 SAVLIST_WRITER_FOREACH(sav, sah, state) { 6212 sav->state = SADB_SASTATE_DEAD; 6213 key_unlink_sav(sav); 6214 mutex_exit(&key_sad.lock); 6215 key_destroy_sav(sav); 6216 goto restart; 6217 } 6218 mutex_exit(&key_sad.lock); 6219 } 6220 key_sah_unref(sah); 6221 } 6222 { 6223 struct mbuf *n; 6224 6225 /* create new sadb_msg to reply. */ 6226 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 6227 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 6228 6229 key_fill_replymsg(n, 0); 6230 m_freem(m); 6231 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 6232 } 6233 } 6234 6235 /* 6236 * SADB_GET processing 6237 * receive 6238 * <base, SA(*), address(SD)> 6239 * from the ikmpd, and get a SP and a SA to respond, 6240 * and send, 6241 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 6242 * (identity(SD),) (sensitivity)> 6243 * to the ikmpd. 6244 * 6245 * m will always be freed. 6246 */ 6247 static int 6248 key_api_get(struct socket *so, struct mbuf *m, 6249 const struct sadb_msghdr *mhp) 6250 { 6251 struct sadb_sa *sa0; 6252 const struct sockaddr *src, *dst; 6253 struct secasindex saidx; 6254 struct secasvar *sav = NULL; 6255 u_int16_t proto; 6256 int error; 6257 6258 /* map satype to proto */ 6259 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6260 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6261 return key_senderror(so, m, EINVAL); 6262 } 6263 6264 if (mhp->ext[SADB_EXT_SA] == NULL || 6265 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6266 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 6267 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6268 return key_senderror(so, m, EINVAL); 6269 } 6270 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 6271 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6272 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 6273 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6274 return key_senderror(so, m, EINVAL); 6275 } 6276 6277 sa0 = mhp->ext[SADB_EXT_SA]; 6278 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6279 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6280 6281 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6282 if (error != 0) 6283 return key_senderror(so, m, EINVAL); 6284 6285 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6286 if (error != 0) 6287 return key_senderror(so, m, EINVAL); 6288 6289 /* get a SA header */ 6290 { 6291 struct secashead *sah; 6292 int s = pserialize_read_enter(); 6293 6294 sah = key_getsah(&saidx, CMP_HEAD); 6295 if (sah != NULL) { 6296 /* get a SA with SPI. */ 6297 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 6298 } 6299 pserialize_read_exit(s); 6300 } 6301 if (sav == NULL) { 6302 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 6303 return key_senderror(so, m, ENOENT); 6304 } 6305 6306 { 6307 struct mbuf *n; 6308 u_int8_t satype; 6309 6310 /* map proto to satype */ 6311 satype = key_proto2satype(sav->sah->saidx.proto); 6312 if (satype == 0) { 6313 KEY_SA_UNREF(&sav); 6314 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 6315 return key_senderror(so, m, EINVAL); 6316 } 6317 6318 /* create new sadb_msg to reply. */ 6319 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 6320 mhp->msg->sadb_msg_pid); 6321 KEY_SA_UNREF(&sav); 6322 m_freem(m); 6323 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 6324 } 6325 } 6326 6327 /* XXX make it sysctl-configurable? */ 6328 static void 6329 key_getcomb_setlifetime(struct sadb_comb *comb) 6330 { 6331 6332 comb->sadb_comb_soft_allocations = 1; 6333 comb->sadb_comb_hard_allocations = 1; 6334 comb->sadb_comb_soft_bytes = 0; 6335 comb->sadb_comb_hard_bytes = 0; 6336 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 6337 comb->sadb_comb_soft_addtime = comb->sadb_comb_hard_addtime * 80 / 100; 6338 comb->sadb_comb_hard_usetime = 28800; /* 8 hours */ 6339 comb->sadb_comb_soft_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 6340 } 6341 6342 /* 6343 * XXX reorder combinations by preference 6344 * XXX no idea if the user wants ESP authentication or not 6345 */ 6346 static struct mbuf * 6347 key_getcomb_esp(int mflag) 6348 { 6349 struct sadb_comb *comb; 6350 const struct enc_xform *algo; 6351 struct mbuf *result = NULL, *m, *n; 6352 int encmin; 6353 int i, off, o; 6354 int totlen; 6355 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6356 6357 m = NULL; 6358 for (i = 1; i <= SADB_EALG_MAX; i++) { 6359 algo = esp_algorithm_lookup(i); 6360 if (algo == NULL) 6361 continue; 6362 6363 /* discard algorithms with key size smaller than system min */ 6364 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 6365 continue; 6366 if (_BITS(algo->minkey) < ipsec_esp_keymin) 6367 encmin = ipsec_esp_keymin; 6368 else 6369 encmin = _BITS(algo->minkey); 6370 6371 if (ipsec_esp_auth) 6372 m = key_getcomb_ah(mflag); 6373 else { 6374 KASSERTMSG(l <= MLEN, 6375 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6376 MGET(m, mflag, MT_DATA); 6377 if (m) { 6378 M_ALIGN(m, l); 6379 m->m_len = l; 6380 m->m_next = NULL; 6381 memset(mtod(m, void *), 0, m->m_len); 6382 } 6383 } 6384 if (!m) 6385 goto fail; 6386 6387 totlen = 0; 6388 for (n = m; n; n = n->m_next) 6389 totlen += n->m_len; 6390 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 6391 6392 for (off = 0; off < totlen; off += l) { 6393 n = m_pulldown(m, off, l, &o); 6394 if (!n) { 6395 /* m is already freed */ 6396 goto fail; 6397 } 6398 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6399 memset(comb, 0, sizeof(*comb)); 6400 key_getcomb_setlifetime(comb); 6401 comb->sadb_comb_encrypt = i; 6402 comb->sadb_comb_encrypt_minbits = encmin; 6403 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6404 } 6405 6406 if (!result) 6407 result = m; 6408 else 6409 m_cat(result, m); 6410 } 6411 6412 return result; 6413 6414 fail: 6415 if (result) 6416 m_freem(result); 6417 return NULL; 6418 } 6419 6420 static void 6421 key_getsizes_ah(const struct auth_hash *ah, int alg, 6422 u_int16_t* ksmin, u_int16_t* ksmax) 6423 { 6424 *ksmin = *ksmax = ah->keysize; 6425 if (ah->keysize == 0) { 6426 /* 6427 * Transform takes arbitrary key size but algorithm 6428 * key size is restricted. Enforce this here. 6429 */ 6430 switch (alg) { 6431 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6432 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6433 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6434 default: 6435 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 6436 break; 6437 } 6438 } 6439 } 6440 6441 /* 6442 * XXX reorder combinations by preference 6443 */ 6444 static struct mbuf * 6445 key_getcomb_ah(int mflag) 6446 { 6447 struct sadb_comb *comb; 6448 const struct auth_hash *algo; 6449 struct mbuf *m; 6450 u_int16_t minkeysize, maxkeysize; 6451 int i; 6452 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6453 6454 m = NULL; 6455 for (i = 1; i <= SADB_AALG_MAX; i++) { 6456 #if 1 6457 /* we prefer HMAC algorithms, not old algorithms */ 6458 if (i != SADB_AALG_SHA1HMAC && 6459 i != SADB_AALG_MD5HMAC && 6460 i != SADB_X_AALG_SHA2_256 && 6461 i != SADB_X_AALG_SHA2_384 && 6462 i != SADB_X_AALG_SHA2_512) 6463 continue; 6464 #endif 6465 algo = ah_algorithm_lookup(i); 6466 if (!algo) 6467 continue; 6468 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6469 /* discard algorithms with key size smaller than system min */ 6470 if (_BITS(minkeysize) < ipsec_ah_keymin) 6471 continue; 6472 6473 if (!m) { 6474 KASSERTMSG(l <= MLEN, 6475 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6476 MGET(m, mflag, MT_DATA); 6477 if (m) { 6478 M_ALIGN(m, l); 6479 m->m_len = l; 6480 m->m_next = NULL; 6481 } 6482 } else 6483 M_PREPEND(m, l, mflag); 6484 if (!m) 6485 return NULL; 6486 6487 if (m->m_len < sizeof(struct sadb_comb)) { 6488 m = m_pullup(m, sizeof(struct sadb_comb)); 6489 if (m == NULL) 6490 return NULL; 6491 } 6492 6493 comb = mtod(m, struct sadb_comb *); 6494 memset(comb, 0, sizeof(*comb)); 6495 key_getcomb_setlifetime(comb); 6496 comb->sadb_comb_auth = i; 6497 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6498 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6499 } 6500 6501 return m; 6502 } 6503 6504 /* 6505 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6506 * XXX reorder combinations by preference 6507 */ 6508 static struct mbuf * 6509 key_getcomb_ipcomp(int mflag) 6510 { 6511 struct sadb_comb *comb; 6512 const struct comp_algo *algo; 6513 struct mbuf *m; 6514 int i; 6515 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6516 6517 m = NULL; 6518 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6519 algo = ipcomp_algorithm_lookup(i); 6520 if (!algo) 6521 continue; 6522 6523 if (!m) { 6524 KASSERTMSG(l <= MLEN, 6525 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6526 MGET(m, mflag, MT_DATA); 6527 if (m) { 6528 M_ALIGN(m, l); 6529 m->m_len = l; 6530 m->m_next = NULL; 6531 } 6532 } else 6533 M_PREPEND(m, l, mflag); 6534 if (!m) 6535 return NULL; 6536 6537 if (m->m_len < sizeof(struct sadb_comb)) { 6538 m = m_pullup(m, sizeof(struct sadb_comb)); 6539 if (m == NULL) 6540 return NULL; 6541 } 6542 6543 comb = mtod(m, struct sadb_comb *); 6544 memset(comb, 0, sizeof(*comb)); 6545 key_getcomb_setlifetime(comb); 6546 comb->sadb_comb_encrypt = i; 6547 /* what should we set into sadb_comb_*_{min,max}bits? */ 6548 } 6549 6550 return m; 6551 } 6552 6553 /* 6554 * XXX no way to pass mode (transport/tunnel) to userland 6555 * XXX replay checking? 6556 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6557 */ 6558 static struct mbuf * 6559 key_getprop(const struct secasindex *saidx, int mflag) 6560 { 6561 struct sadb_prop *prop; 6562 struct mbuf *m, *n; 6563 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6564 int totlen; 6565 6566 switch (saidx->proto) { 6567 case IPPROTO_ESP: 6568 m = key_getcomb_esp(mflag); 6569 break; 6570 case IPPROTO_AH: 6571 m = key_getcomb_ah(mflag); 6572 break; 6573 case IPPROTO_IPCOMP: 6574 m = key_getcomb_ipcomp(mflag); 6575 break; 6576 default: 6577 return NULL; 6578 } 6579 6580 if (!m) 6581 return NULL; 6582 M_PREPEND(m, l, mflag); 6583 if (!m) 6584 return NULL; 6585 6586 totlen = 0; 6587 for (n = m; n; n = n->m_next) 6588 totlen += n->m_len; 6589 6590 prop = mtod(m, struct sadb_prop *); 6591 memset(prop, 0, sizeof(*prop)); 6592 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6593 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6594 prop->sadb_prop_replay = 32; /* XXX */ 6595 6596 return m; 6597 } 6598 6599 /* 6600 * SADB_ACQUIRE processing called by key_checkrequest() and key_api_acquire(). 6601 * send 6602 * <base, SA, address(SD), (address(P)), x_policy, 6603 * (identity(SD),) (sensitivity,) proposal> 6604 * to KMD, and expect to receive 6605 * <base> with SADB_ACQUIRE if error occurred, 6606 * or 6607 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6608 * from KMD by PF_KEY. 6609 * 6610 * XXX x_policy is outside of RFC2367 (KAME extension). 6611 * XXX sensitivity is not supported. 6612 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6613 * see comment for key_getcomb_ipcomp(). 6614 * 6615 * OUT: 6616 * 0 : succeed 6617 * others: error number 6618 */ 6619 static int 6620 key_acquire(const struct secasindex *saidx, const struct secpolicy *sp, int mflag) 6621 { 6622 struct mbuf *result = NULL, *m; 6623 #ifndef IPSEC_NONBLOCK_ACQUIRE 6624 struct secacq *newacq; 6625 #endif 6626 u_int8_t satype; 6627 int error = -1; 6628 u_int32_t seq; 6629 6630 /* sanity check */ 6631 KASSERT(saidx != NULL); 6632 satype = key_proto2satype(saidx->proto); 6633 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6634 6635 #ifndef IPSEC_NONBLOCK_ACQUIRE 6636 /* 6637 * We never do anything about acquirng SA. There is anather 6638 * solution that kernel blocks to send SADB_ACQUIRE message until 6639 * getting something message from IKEd. In later case, to be 6640 * managed with ACQUIRING list. 6641 */ 6642 /* Get an entry to check whether sending message or not. */ 6643 mutex_enter(&key_misc.lock); 6644 newacq = key_getacq(saidx); 6645 if (newacq != NULL) { 6646 if (key_blockacq_count < newacq->count) { 6647 /* reset counter and do send message. */ 6648 newacq->count = 0; 6649 } else { 6650 /* increment counter and do nothing. */ 6651 newacq->count++; 6652 mutex_exit(&key_misc.lock); 6653 return 0; 6654 } 6655 } else { 6656 /* make new entry for blocking to send SADB_ACQUIRE. */ 6657 newacq = key_newacq(saidx); 6658 if (newacq == NULL) { 6659 mutex_exit(&key_misc.lock); 6660 return ENOBUFS; 6661 } 6662 6663 /* add to key_misc.acqlist */ 6664 LIST_INSERT_HEAD(&key_misc.acqlist, newacq, chain); 6665 } 6666 6667 seq = newacq->seq; 6668 mutex_exit(&key_misc.lock); 6669 #else 6670 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6671 #endif 6672 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0, mflag); 6673 if (!m) { 6674 error = ENOBUFS; 6675 goto fail; 6676 } 6677 result = m; 6678 6679 /* set sadb_address for saidx's. */ 6680 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6681 IPSEC_ULPROTO_ANY, mflag); 6682 if (!m) { 6683 error = ENOBUFS; 6684 goto fail; 6685 } 6686 m_cat(result, m); 6687 6688 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6689 IPSEC_ULPROTO_ANY, mflag); 6690 if (!m) { 6691 error = ENOBUFS; 6692 goto fail; 6693 } 6694 m_cat(result, m); 6695 6696 /* XXX proxy address (optional) */ 6697 6698 /* set sadb_x_policy */ 6699 if (sp) { 6700 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id, 6701 mflag); 6702 if (!m) { 6703 error = ENOBUFS; 6704 goto fail; 6705 } 6706 m_cat(result, m); 6707 } 6708 6709 /* XXX identity (optional) */ 6710 #if 0 6711 if (idexttype && fqdn) { 6712 /* create identity extension (FQDN) */ 6713 struct sadb_ident *id; 6714 int fqdnlen; 6715 6716 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6717 id = (struct sadb_ident *)p; 6718 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6719 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6720 id->sadb_ident_exttype = idexttype; 6721 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6722 memcpy(id + 1, fqdn, fqdnlen); 6723 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6724 } 6725 6726 if (idexttype) { 6727 /* create identity extension (USERFQDN) */ 6728 struct sadb_ident *id; 6729 int userfqdnlen; 6730 6731 if (userfqdn) { 6732 /* +1 for terminating-NUL */ 6733 userfqdnlen = strlen(userfqdn) + 1; 6734 } else 6735 userfqdnlen = 0; 6736 id = (struct sadb_ident *)p; 6737 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6738 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6739 id->sadb_ident_exttype = idexttype; 6740 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6741 /* XXX is it correct? */ 6742 if (curlwp) 6743 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6744 if (userfqdn && userfqdnlen) 6745 memcpy(id + 1, userfqdn, userfqdnlen); 6746 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6747 } 6748 #endif 6749 6750 /* XXX sensitivity (optional) */ 6751 6752 /* create proposal/combination extension */ 6753 m = key_getprop(saidx, mflag); 6754 #if 0 6755 /* 6756 * spec conformant: always attach proposal/combination extension, 6757 * the problem is that we have no way to attach it for ipcomp, 6758 * due to the way sadb_comb is declared in RFC2367. 6759 */ 6760 if (!m) { 6761 error = ENOBUFS; 6762 goto fail; 6763 } 6764 m_cat(result, m); 6765 #else 6766 /* 6767 * outside of spec; make proposal/combination extension optional. 6768 */ 6769 if (m) 6770 m_cat(result, m); 6771 #endif 6772 6773 KASSERT(result->m_flags & M_PKTHDR); 6774 KASSERT(result->m_len >= sizeof(struct sadb_msg)); 6775 6776 result->m_pkthdr.len = 0; 6777 for (m = result; m; m = m->m_next) 6778 result->m_pkthdr.len += m->m_len; 6779 6780 mtod(result, struct sadb_msg *)->sadb_msg_len = 6781 PFKEY_UNIT64(result->m_pkthdr.len); 6782 6783 /* 6784 * Called from key_api_acquire that must come from userland, so 6785 * we can call key_sendup_mbuf immediately. 6786 */ 6787 if (mflag == M_WAITOK) 6788 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6789 /* 6790 * XXX we cannot call key_sendup_mbuf directly here because 6791 * it can cause a deadlock: 6792 * - We have a reference to an SP (and an SA) here 6793 * - key_sendup_mbuf will try to take key_so_mtx 6794 * - Some other thread may try to localcount_drain to the SP with 6795 * holding key_so_mtx in say key_api_spdflush 6796 * - In this case localcount_drain never return because key_sendup_mbuf 6797 * that has stuck on key_so_mtx never release a reference to the SP 6798 * 6799 * So defer key_sendup_mbuf to the timer. 6800 */ 6801 return key_acquire_sendup_mbuf_later(result); 6802 6803 fail: 6804 if (result) 6805 m_freem(result); 6806 return error; 6807 } 6808 6809 static struct mbuf *key_acquire_mbuf_head = NULL; 6810 static unsigned key_acquire_mbuf_count = 0; 6811 #define KEY_ACQUIRE_MBUF_MAX 10 6812 6813 static void 6814 key_acquire_sendup_pending_mbuf(void) 6815 { 6816 struct mbuf *m, *prev; 6817 int error; 6818 6819 again: 6820 prev = NULL; 6821 mutex_enter(&key_misc.lock); 6822 m = key_acquire_mbuf_head; 6823 /* Get an earliest mbuf (one at the tail of the list) */ 6824 while (m != NULL) { 6825 if (m->m_nextpkt == NULL) { 6826 if (prev != NULL) 6827 prev->m_nextpkt = NULL; 6828 if (m == key_acquire_mbuf_head) 6829 key_acquire_mbuf_head = NULL; 6830 key_acquire_mbuf_count--; 6831 break; 6832 } 6833 prev = m; 6834 m = m->m_nextpkt; 6835 } 6836 mutex_exit(&key_misc.lock); 6837 6838 if (m == NULL) 6839 return; 6840 6841 m->m_nextpkt = NULL; 6842 error = key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 6843 if (error != 0) 6844 IPSECLOG(LOG_WARNING, "key_sendup_mbuf failed (error=%d)\n", 6845 error); 6846 6847 if (prev != NULL) 6848 goto again; 6849 } 6850 6851 static int 6852 key_acquire_sendup_mbuf_later(struct mbuf *m) 6853 { 6854 6855 mutex_enter(&key_misc.lock); 6856 /* Avoid queuing too much mbufs */ 6857 if (key_acquire_mbuf_count >= KEY_ACQUIRE_MBUF_MAX) { 6858 mutex_exit(&key_misc.lock); 6859 m_freem(m); 6860 return ENOBUFS; /* XXX */ 6861 } 6862 /* Enqueue mbuf at the head of the list */ 6863 m->m_nextpkt = key_acquire_mbuf_head; 6864 key_acquire_mbuf_head = m; 6865 key_acquire_mbuf_count++; 6866 mutex_exit(&key_misc.lock); 6867 6868 /* Kick the timer */ 6869 key_timehandler(NULL); 6870 6871 return 0; 6872 } 6873 6874 #ifndef IPSEC_NONBLOCK_ACQUIRE 6875 static struct secacq * 6876 key_newacq(const struct secasindex *saidx) 6877 { 6878 struct secacq *newacq; 6879 6880 /* get new entry */ 6881 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6882 if (newacq == NULL) { 6883 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6884 return NULL; 6885 } 6886 6887 /* copy secindex */ 6888 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6889 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6890 newacq->created = time_uptime; 6891 newacq->count = 0; 6892 6893 return newacq; 6894 } 6895 6896 static struct secacq * 6897 key_getacq(const struct secasindex *saidx) 6898 { 6899 struct secacq *acq; 6900 6901 KASSERT(mutex_owned(&key_misc.lock)); 6902 6903 LIST_FOREACH(acq, &key_misc.acqlist, chain) { 6904 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6905 return acq; 6906 } 6907 6908 return NULL; 6909 } 6910 6911 static struct secacq * 6912 key_getacqbyseq(u_int32_t seq) 6913 { 6914 struct secacq *acq; 6915 6916 KASSERT(mutex_owned(&key_misc.lock)); 6917 6918 LIST_FOREACH(acq, &key_misc.acqlist, chain) { 6919 if (acq->seq == seq) 6920 return acq; 6921 } 6922 6923 return NULL; 6924 } 6925 #endif 6926 6927 #ifdef notyet 6928 static struct secspacq * 6929 key_newspacq(const struct secpolicyindex *spidx) 6930 { 6931 struct secspacq *acq; 6932 6933 /* get new entry */ 6934 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6935 if (acq == NULL) { 6936 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6937 return NULL; 6938 } 6939 6940 /* copy secindex */ 6941 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6942 acq->created = time_uptime; 6943 acq->count = 0; 6944 6945 return acq; 6946 } 6947 6948 static struct secspacq * 6949 key_getspacq(const struct secpolicyindex *spidx) 6950 { 6951 struct secspacq *acq; 6952 6953 LIST_FOREACH(acq, &key_misc.spacqlist, chain) { 6954 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6955 return acq; 6956 } 6957 6958 return NULL; 6959 } 6960 #endif /* notyet */ 6961 6962 /* 6963 * SADB_ACQUIRE processing, 6964 * in first situation, is receiving 6965 * <base> 6966 * from the ikmpd, and clear sequence of its secasvar entry. 6967 * 6968 * In second situation, is receiving 6969 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6970 * from a user land process, and return 6971 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6972 * to the socket. 6973 * 6974 * m will always be freed. 6975 */ 6976 static int 6977 key_api_acquire(struct socket *so, struct mbuf *m, 6978 const struct sadb_msghdr *mhp) 6979 { 6980 const struct sockaddr *src, *dst; 6981 struct secasindex saidx; 6982 u_int16_t proto; 6983 int error; 6984 6985 /* 6986 * Error message from KMd. 6987 * We assume that if error was occurred in IKEd, the length of PFKEY 6988 * message is equal to the size of sadb_msg structure. 6989 * We do not raise error even if error occurred in this function. 6990 */ 6991 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6992 #ifndef IPSEC_NONBLOCK_ACQUIRE 6993 struct secacq *acq; 6994 6995 /* check sequence number */ 6996 if (mhp->msg->sadb_msg_seq == 0) { 6997 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 6998 m_freem(m); 6999 return 0; 7000 } 7001 7002 mutex_enter(&key_misc.lock); 7003 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 7004 if (acq == NULL) { 7005 mutex_exit(&key_misc.lock); 7006 /* 7007 * the specified larval SA is already gone, or we got 7008 * a bogus sequence number. we can silently ignore it. 7009 */ 7010 m_freem(m); 7011 return 0; 7012 } 7013 7014 /* reset acq counter in order to deletion by timehander. */ 7015 acq->created = time_uptime; 7016 acq->count = 0; 7017 mutex_exit(&key_misc.lock); 7018 #endif 7019 m_freem(m); 7020 return 0; 7021 } 7022 7023 /* 7024 * This message is from user land. 7025 */ 7026 7027 /* map satype to proto */ 7028 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 7029 if (proto == 0) { 7030 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7031 return key_senderror(so, m, EINVAL); 7032 } 7033 7034 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 7035 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 7036 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 7037 /* error */ 7038 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 7039 return key_senderror(so, m, EINVAL); 7040 } 7041 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 7042 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 7043 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 7044 /* error */ 7045 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 7046 return key_senderror(so, m, EINVAL); 7047 } 7048 7049 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 7050 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 7051 7052 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 7053 if (error != 0) 7054 return key_senderror(so, m, EINVAL); 7055 7056 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 7057 if (error != 0) 7058 return key_senderror(so, m, EINVAL); 7059 7060 /* get a SA index */ 7061 { 7062 struct secashead *sah; 7063 int s = pserialize_read_enter(); 7064 7065 sah = key_getsah(&saidx, CMP_MODE_REQID); 7066 if (sah != NULL) { 7067 pserialize_read_exit(s); 7068 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 7069 return key_senderror(so, m, EEXIST); 7070 } 7071 pserialize_read_exit(s); 7072 } 7073 7074 error = key_acquire(&saidx, NULL, M_WAITOK); 7075 if (error != 0) { 7076 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 7077 error); 7078 return key_senderror(so, m, error); 7079 } 7080 7081 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 7082 } 7083 7084 /* 7085 * SADB_REGISTER processing. 7086 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 7087 * receive 7088 * <base> 7089 * from the ikmpd, and register a socket to send PF_KEY messages, 7090 * and send 7091 * <base, supported> 7092 * to KMD by PF_KEY. 7093 * If socket is detached, must free from regnode. 7094 * 7095 * m will always be freed. 7096 */ 7097 static int 7098 key_api_register(struct socket *so, struct mbuf *m, 7099 const struct sadb_msghdr *mhp) 7100 { 7101 struct secreg *reg, *newreg = 0; 7102 7103 /* check for invalid register message */ 7104 if (mhp->msg->sadb_msg_satype >= __arraycount(key_misc.reglist)) 7105 return key_senderror(so, m, EINVAL); 7106 7107 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 7108 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 7109 goto setmsg; 7110 7111 /* Allocate regnode in advance, out of mutex */ 7112 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 7113 7114 /* check whether existing or not */ 7115 mutex_enter(&key_misc.lock); 7116 LIST_FOREACH(reg, &key_misc.reglist[mhp->msg->sadb_msg_satype], chain) { 7117 if (reg->so == so) { 7118 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 7119 mutex_exit(&key_misc.lock); 7120 kmem_free(newreg, sizeof(*newreg)); 7121 return key_senderror(so, m, EEXIST); 7122 } 7123 } 7124 7125 newreg->so = so; 7126 ((struct keycb *)sotorawcb(so))->kp_registered++; 7127 7128 /* add regnode to key_misc.reglist. */ 7129 LIST_INSERT_HEAD(&key_misc.reglist[mhp->msg->sadb_msg_satype], newreg, chain); 7130 mutex_exit(&key_misc.lock); 7131 7132 setmsg: 7133 { 7134 struct mbuf *n; 7135 struct sadb_supported *sup; 7136 u_int len, alen, elen; 7137 int off; 7138 int i; 7139 struct sadb_alg *alg; 7140 7141 /* create new sadb_msg to reply. */ 7142 alen = 0; 7143 for (i = 1; i <= SADB_AALG_MAX; i++) { 7144 if (ah_algorithm_lookup(i)) 7145 alen += sizeof(struct sadb_alg); 7146 } 7147 if (alen) 7148 alen += sizeof(struct sadb_supported); 7149 elen = 0; 7150 for (i = 1; i <= SADB_EALG_MAX; i++) { 7151 if (esp_algorithm_lookup(i)) 7152 elen += sizeof(struct sadb_alg); 7153 } 7154 if (elen) 7155 elen += sizeof(struct sadb_supported); 7156 7157 len = sizeof(struct sadb_msg) + alen + elen; 7158 7159 if (len > MCLBYTES) 7160 return key_senderror(so, m, ENOBUFS); 7161 7162 n = key_alloc_mbuf_simple(len, M_WAITOK); 7163 n->m_pkthdr.len = n->m_len = len; 7164 n->m_next = NULL; 7165 off = 0; 7166 7167 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 7168 key_fill_replymsg(n, 0); 7169 7170 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 7171 7172 /* for authentication algorithm */ 7173 if (alen) { 7174 sup = (struct sadb_supported *)(mtod(n, char *) + off); 7175 sup->sadb_supported_len = PFKEY_UNIT64(alen); 7176 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 7177 off += PFKEY_ALIGN8(sizeof(*sup)); 7178 7179 for (i = 1; i <= SADB_AALG_MAX; i++) { 7180 const struct auth_hash *aalgo; 7181 u_int16_t minkeysize, maxkeysize; 7182 7183 aalgo = ah_algorithm_lookup(i); 7184 if (!aalgo) 7185 continue; 7186 alg = (struct sadb_alg *)(mtod(n, char *) + off); 7187 alg->sadb_alg_id = i; 7188 alg->sadb_alg_ivlen = 0; 7189 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 7190 alg->sadb_alg_minbits = _BITS(minkeysize); 7191 alg->sadb_alg_maxbits = _BITS(maxkeysize); 7192 off += PFKEY_ALIGN8(sizeof(*alg)); 7193 } 7194 } 7195 7196 /* for encryption algorithm */ 7197 if (elen) { 7198 sup = (struct sadb_supported *)(mtod(n, char *) + off); 7199 sup->sadb_supported_len = PFKEY_UNIT64(elen); 7200 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 7201 off += PFKEY_ALIGN8(sizeof(*sup)); 7202 7203 for (i = 1; i <= SADB_EALG_MAX; i++) { 7204 const struct enc_xform *ealgo; 7205 7206 ealgo = esp_algorithm_lookup(i); 7207 if (!ealgo) 7208 continue; 7209 alg = (struct sadb_alg *)(mtod(n, char *) + off); 7210 alg->sadb_alg_id = i; 7211 alg->sadb_alg_ivlen = ealgo->blocksize; 7212 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 7213 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 7214 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 7215 } 7216 } 7217 7218 KASSERTMSG(off == len, "length inconsistency"); 7219 7220 m_freem(m); 7221 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 7222 } 7223 } 7224 7225 /* 7226 * free secreg entry registered. 7227 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 7228 */ 7229 void 7230 key_freereg(struct socket *so) 7231 { 7232 struct secreg *reg; 7233 int i; 7234 7235 KASSERT(!cpu_softintr_p()); 7236 KASSERT(so != NULL); 7237 7238 /* 7239 * check whether existing or not. 7240 * check all type of SA, because there is a potential that 7241 * one socket is registered to multiple type of SA. 7242 */ 7243 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7244 mutex_enter(&key_misc.lock); 7245 LIST_FOREACH(reg, &key_misc.reglist[i], chain) { 7246 if (reg->so == so) { 7247 LIST_REMOVE(reg, chain); 7248 break; 7249 } 7250 } 7251 mutex_exit(&key_misc.lock); 7252 if (reg != NULL) 7253 kmem_free(reg, sizeof(*reg)); 7254 } 7255 7256 return; 7257 } 7258 7259 /* 7260 * SADB_EXPIRE processing 7261 * send 7262 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 7263 * to KMD by PF_KEY. 7264 * NOTE: We send only soft lifetime extension. 7265 * 7266 * OUT: 0 : succeed 7267 * others : error number 7268 */ 7269 static int 7270 key_expire(struct secasvar *sav) 7271 { 7272 int s; 7273 int satype; 7274 struct mbuf *result = NULL, *m; 7275 int len; 7276 int error = -1; 7277 struct sadb_lifetime *lt; 7278 lifetime_counters_t sum = {0}; 7279 7280 /* XXX: Why do we lock ? */ 7281 s = splsoftnet(); /*called from softclock()*/ 7282 7283 KASSERT(sav != NULL); 7284 7285 satype = key_proto2satype(sav->sah->saidx.proto); 7286 KASSERTMSG(satype != 0, "invalid proto is passed"); 7287 7288 /* set msg header */ 7289 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, key_sa_refcnt(sav), 7290 M_WAITOK); 7291 result = m; 7292 7293 /* create SA extension */ 7294 m = key_setsadbsa(sav); 7295 m_cat(result, m); 7296 7297 /* create SA extension */ 7298 m = key_setsadbxsa2(sav->sah->saidx.mode, 7299 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 7300 m_cat(result, m); 7301 7302 /* create lifetime extension (current and soft) */ 7303 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 7304 m = key_alloc_mbuf(len, M_WAITOK); 7305 KASSERT(m->m_next == NULL); 7306 7307 memset(mtod(m, void *), 0, len); 7308 lt = mtod(m, struct sadb_lifetime *); 7309 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 7310 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 7311 percpu_foreach(sav->lft_c_counters_percpu, 7312 key_sum_lifetime_counters, sum); 7313 lt->sadb_lifetime_allocations = sum[LIFETIME_COUNTER_ALLOCATIONS]; 7314 lt->sadb_lifetime_bytes = sum[LIFETIME_COUNTER_BYTES]; 7315 lt->sadb_lifetime_addtime = 7316 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 7317 lt->sadb_lifetime_usetime = 7318 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 7319 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 7320 memcpy(lt, sav->lft_s, sizeof(*lt)); 7321 m_cat(result, m); 7322 7323 /* set sadb_address for source */ 7324 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 7325 FULLMASK, IPSEC_ULPROTO_ANY, M_WAITOK); 7326 m_cat(result, m); 7327 7328 /* set sadb_address for destination */ 7329 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 7330 FULLMASK, IPSEC_ULPROTO_ANY, M_WAITOK); 7331 m_cat(result, m); 7332 7333 if ((result->m_flags & M_PKTHDR) == 0) { 7334 error = EINVAL; 7335 goto fail; 7336 } 7337 7338 if (result->m_len < sizeof(struct sadb_msg)) { 7339 result = m_pullup(result, sizeof(struct sadb_msg)); 7340 if (result == NULL) { 7341 error = ENOBUFS; 7342 goto fail; 7343 } 7344 } 7345 7346 result->m_pkthdr.len = 0; 7347 for (m = result; m; m = m->m_next) 7348 result->m_pkthdr.len += m->m_len; 7349 7350 mtod(result, struct sadb_msg *)->sadb_msg_len = 7351 PFKEY_UNIT64(result->m_pkthdr.len); 7352 7353 splx(s); 7354 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7355 7356 fail: 7357 if (result) 7358 m_freem(result); 7359 splx(s); 7360 return error; 7361 } 7362 7363 /* 7364 * SADB_FLUSH processing 7365 * receive 7366 * <base> 7367 * from the ikmpd, and free all entries in secastree. 7368 * and send, 7369 * <base> 7370 * to the ikmpd. 7371 * NOTE: to do is only marking SADB_SASTATE_DEAD. 7372 * 7373 * m will always be freed. 7374 */ 7375 static int 7376 key_api_flush(struct socket *so, struct mbuf *m, 7377 const struct sadb_msghdr *mhp) 7378 { 7379 struct sadb_msg *newmsg; 7380 struct secashead *sah; 7381 struct secasvar *sav; 7382 u_int16_t proto; 7383 u_int8_t state; 7384 int s; 7385 7386 /* map satype to proto */ 7387 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 7388 if (proto == 0) { 7389 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7390 return key_senderror(so, m, EINVAL); 7391 } 7392 7393 /* no SATYPE specified, i.e. flushing all SA. */ 7394 s = pserialize_read_enter(); 7395 SAHLIST_READER_FOREACH(sah) { 7396 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 7397 proto != sah->saidx.proto) 7398 continue; 7399 7400 key_sah_ref(sah); 7401 pserialize_read_exit(s); 7402 7403 SASTATE_ALIVE_FOREACH(state) { 7404 restart: 7405 mutex_enter(&key_sad.lock); 7406 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7407 sav->state = SADB_SASTATE_DEAD; 7408 key_unlink_sav(sav); 7409 mutex_exit(&key_sad.lock); 7410 key_destroy_sav(sav); 7411 goto restart; 7412 } 7413 mutex_exit(&key_sad.lock); 7414 } 7415 7416 s = pserialize_read_enter(); 7417 sah->state = SADB_SASTATE_DEAD; 7418 key_sah_unref(sah); 7419 } 7420 pserialize_read_exit(s); 7421 7422 if (m->m_len < sizeof(struct sadb_msg) || 7423 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7424 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 7425 return key_senderror(so, m, ENOBUFS); 7426 } 7427 7428 if (m->m_next) 7429 m_freem(m->m_next); 7430 m->m_next = NULL; 7431 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7432 newmsg = mtod(m, struct sadb_msg *); 7433 newmsg->sadb_msg_errno = 0; 7434 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7435 7436 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7437 } 7438 7439 7440 static struct mbuf * 7441 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7442 { 7443 struct secashead *sah; 7444 struct secasvar *sav; 7445 u_int16_t proto; 7446 u_int8_t satype; 7447 u_int8_t state; 7448 int cnt; 7449 struct mbuf *m, *n, *prev; 7450 7451 KASSERT(mutex_owned(&key_sad.lock)); 7452 7453 *lenp = 0; 7454 7455 /* map satype to proto */ 7456 proto = key_satype2proto(req_satype); 7457 if (proto == 0) { 7458 *errorp = EINVAL; 7459 return (NULL); 7460 } 7461 7462 /* count sav entries to be sent to userland. */ 7463 cnt = 0; 7464 SAHLIST_WRITER_FOREACH(sah) { 7465 if (req_satype != SADB_SATYPE_UNSPEC && 7466 proto != sah->saidx.proto) 7467 continue; 7468 7469 SASTATE_ANY_FOREACH(state) { 7470 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7471 cnt++; 7472 } 7473 } 7474 } 7475 7476 if (cnt == 0) { 7477 *errorp = ENOENT; 7478 return (NULL); 7479 } 7480 7481 /* send this to the userland, one at a time. */ 7482 m = NULL; 7483 prev = m; 7484 SAHLIST_WRITER_FOREACH(sah) { 7485 if (req_satype != SADB_SATYPE_UNSPEC && 7486 proto != sah->saidx.proto) 7487 continue; 7488 7489 /* map proto to satype */ 7490 satype = key_proto2satype(sah->saidx.proto); 7491 if (satype == 0) { 7492 m_freem(m); 7493 *errorp = EINVAL; 7494 return (NULL); 7495 } 7496 7497 SASTATE_ANY_FOREACH(state) { 7498 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7499 n = key_setdumpsa(sav, SADB_DUMP, satype, 7500 --cnt, pid); 7501 if (!m) 7502 m = n; 7503 else 7504 prev->m_nextpkt = n; 7505 prev = n; 7506 } 7507 } 7508 } 7509 7510 if (!m) { 7511 *errorp = EINVAL; 7512 return (NULL); 7513 } 7514 7515 if ((m->m_flags & M_PKTHDR) != 0) { 7516 m->m_pkthdr.len = 0; 7517 for (n = m; n; n = n->m_next) 7518 m->m_pkthdr.len += n->m_len; 7519 } 7520 7521 *errorp = 0; 7522 return (m); 7523 } 7524 7525 /* 7526 * SADB_DUMP processing 7527 * dump all entries including status of DEAD in SAD. 7528 * receive 7529 * <base> 7530 * from the ikmpd, and dump all secasvar leaves 7531 * and send, 7532 * <base> ..... 7533 * to the ikmpd. 7534 * 7535 * m will always be freed. 7536 */ 7537 static int 7538 key_api_dump(struct socket *so, struct mbuf *m0, 7539 const struct sadb_msghdr *mhp) 7540 { 7541 u_int16_t proto; 7542 u_int8_t satype; 7543 struct mbuf *n; 7544 int error, len, ok; 7545 7546 /* map satype to proto */ 7547 satype = mhp->msg->sadb_msg_satype; 7548 proto = key_satype2proto(satype); 7549 if (proto == 0) { 7550 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7551 return key_senderror(so, m0, EINVAL); 7552 } 7553 7554 /* 7555 * If the requestor has insufficient socket-buffer space 7556 * for the entire chain, nobody gets any response to the DUMP. 7557 * XXX For now, only the requestor ever gets anything. 7558 * Moreover, if the requestor has any space at all, they receive 7559 * the entire chain, otherwise the request is refused with ENOBUFS. 7560 */ 7561 if (sbspace(&so->so_rcv) <= 0) { 7562 return key_senderror(so, m0, ENOBUFS); 7563 } 7564 7565 mutex_enter(&key_sad.lock); 7566 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7567 mutex_exit(&key_sad.lock); 7568 7569 if (n == NULL) { 7570 return key_senderror(so, m0, ENOENT); 7571 } 7572 { 7573 uint64_t *ps = PFKEY_STAT_GETREF(); 7574 ps[PFKEY_STAT_IN_TOTAL]++; 7575 ps[PFKEY_STAT_IN_BYTES] += len; 7576 PFKEY_STAT_PUTREF(); 7577 } 7578 7579 /* 7580 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7581 * The requestor receives either the entire chain, or an 7582 * error message with ENOBUFS. 7583 * 7584 * sbappendaddrchain() takes the chain of entries, one 7585 * packet-record per SPD entry, prepends the key_src sockaddr 7586 * to each packet-record, links the sockaddr mbufs into a new 7587 * list of records, then appends the entire resulting 7588 * list to the requesting socket. 7589 */ 7590 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7591 SB_PRIO_ONESHOT_OVERFLOW); 7592 7593 if (!ok) { 7594 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7595 m_freem(n); 7596 return key_senderror(so, m0, ENOBUFS); 7597 } 7598 7599 m_freem(m0); 7600 return 0; 7601 } 7602 7603 /* 7604 * SADB_X_PROMISC processing 7605 * 7606 * m will always be freed. 7607 */ 7608 static int 7609 key_api_promisc(struct socket *so, struct mbuf *m, 7610 const struct sadb_msghdr *mhp) 7611 { 7612 int olen; 7613 7614 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7615 7616 if (olen < sizeof(struct sadb_msg)) { 7617 #if 1 7618 return key_senderror(so, m, EINVAL); 7619 #else 7620 m_freem(m); 7621 return 0; 7622 #endif 7623 } else if (olen == sizeof(struct sadb_msg)) { 7624 /* enable/disable promisc mode */ 7625 struct keycb *kp = (struct keycb *)sotorawcb(so); 7626 if (kp == NULL) 7627 return key_senderror(so, m, EINVAL); 7628 mhp->msg->sadb_msg_errno = 0; 7629 switch (mhp->msg->sadb_msg_satype) { 7630 case 0: 7631 case 1: 7632 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7633 break; 7634 default: 7635 return key_senderror(so, m, EINVAL); 7636 } 7637 7638 /* send the original message back to everyone */ 7639 mhp->msg->sadb_msg_errno = 0; 7640 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7641 } else { 7642 /* send packet as is */ 7643 7644 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7645 7646 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7647 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7648 } 7649 } 7650 7651 static int (*key_api_typesw[]) (struct socket *, struct mbuf *, 7652 const struct sadb_msghdr *) = { 7653 NULL, /* SADB_RESERVED */ 7654 key_api_getspi, /* SADB_GETSPI */ 7655 key_api_update, /* SADB_UPDATE */ 7656 key_api_add, /* SADB_ADD */ 7657 key_api_delete, /* SADB_DELETE */ 7658 key_api_get, /* SADB_GET */ 7659 key_api_acquire, /* SADB_ACQUIRE */ 7660 key_api_register, /* SADB_REGISTER */ 7661 NULL, /* SADB_EXPIRE */ 7662 key_api_flush, /* SADB_FLUSH */ 7663 key_api_dump, /* SADB_DUMP */ 7664 key_api_promisc, /* SADB_X_PROMISC */ 7665 NULL, /* SADB_X_PCHANGE */ 7666 key_api_spdadd, /* SADB_X_SPDUPDATE */ 7667 key_api_spdadd, /* SADB_X_SPDADD */ 7668 key_api_spddelete, /* SADB_X_SPDDELETE */ 7669 key_api_spdget, /* SADB_X_SPDGET */ 7670 NULL, /* SADB_X_SPDACQUIRE */ 7671 key_api_spddump, /* SADB_X_SPDDUMP */ 7672 key_api_spdflush, /* SADB_X_SPDFLUSH */ 7673 key_api_spdadd, /* SADB_X_SPDSETIDX */ 7674 NULL, /* SADB_X_SPDEXPIRE */ 7675 key_api_spddelete2, /* SADB_X_SPDDELETE2 */ 7676 key_api_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7677 }; 7678 7679 /* 7680 * parse sadb_msg buffer to process PFKEYv2, 7681 * and create a data to response if needed. 7682 * I think to be dealed with mbuf directly. 7683 * IN: 7684 * msgp : pointer to pointer to a received buffer pulluped. 7685 * This is rewrited to response. 7686 * so : pointer to socket. 7687 * OUT: 7688 * length for buffer to send to user process. 7689 */ 7690 int 7691 key_parse(struct mbuf *m, struct socket *so) 7692 { 7693 struct sadb_msg *msg; 7694 struct sadb_msghdr mh; 7695 u_int orglen; 7696 int error; 7697 7698 KASSERT(m != NULL); 7699 KASSERT(so != NULL); 7700 7701 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7702 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7703 kdebug_sadb("passed sadb_msg", msg); 7704 } 7705 #endif 7706 7707 if (m->m_len < sizeof(struct sadb_msg)) { 7708 m = m_pullup(m, sizeof(struct sadb_msg)); 7709 if (!m) 7710 return ENOBUFS; 7711 } 7712 msg = mtod(m, struct sadb_msg *); 7713 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7714 7715 if ((m->m_flags & M_PKTHDR) == 0 || 7716 m->m_pkthdr.len != orglen) { 7717 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7718 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7719 error = EINVAL; 7720 goto senderror; 7721 } 7722 7723 if (msg->sadb_msg_version != PF_KEY_V2) { 7724 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7725 msg->sadb_msg_version); 7726 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7727 error = EINVAL; 7728 goto senderror; 7729 } 7730 7731 if (msg->sadb_msg_type > SADB_MAX) { 7732 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7733 msg->sadb_msg_type); 7734 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7735 error = EINVAL; 7736 goto senderror; 7737 } 7738 7739 /* for old-fashioned code - should be nuked */ 7740 if (m->m_pkthdr.len > MCLBYTES) { 7741 m_freem(m); 7742 return ENOBUFS; 7743 } 7744 if (m->m_next) { 7745 struct mbuf *n; 7746 7747 n = key_alloc_mbuf_simple(m->m_pkthdr.len, M_WAITOK); 7748 7749 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7750 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7751 n->m_next = NULL; 7752 m_freem(m); 7753 m = n; 7754 } 7755 7756 /* align the mbuf chain so that extensions are in contiguous region. */ 7757 error = key_align(m, &mh); 7758 if (error) 7759 return error; 7760 7761 if (m->m_next) { /*XXX*/ 7762 m_freem(m); 7763 return ENOBUFS; 7764 } 7765 7766 msg = mh.msg; 7767 7768 /* check SA type */ 7769 switch (msg->sadb_msg_satype) { 7770 case SADB_SATYPE_UNSPEC: 7771 switch (msg->sadb_msg_type) { 7772 case SADB_GETSPI: 7773 case SADB_UPDATE: 7774 case SADB_ADD: 7775 case SADB_DELETE: 7776 case SADB_GET: 7777 case SADB_ACQUIRE: 7778 case SADB_EXPIRE: 7779 IPSECLOG(LOG_DEBUG, 7780 "must specify satype when msg type=%u.\n", 7781 msg->sadb_msg_type); 7782 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7783 error = EINVAL; 7784 goto senderror; 7785 } 7786 break; 7787 case SADB_SATYPE_AH: 7788 case SADB_SATYPE_ESP: 7789 case SADB_X_SATYPE_IPCOMP: 7790 case SADB_X_SATYPE_TCPSIGNATURE: 7791 switch (msg->sadb_msg_type) { 7792 case SADB_X_SPDADD: 7793 case SADB_X_SPDDELETE: 7794 case SADB_X_SPDGET: 7795 case SADB_X_SPDDUMP: 7796 case SADB_X_SPDFLUSH: 7797 case SADB_X_SPDSETIDX: 7798 case SADB_X_SPDUPDATE: 7799 case SADB_X_SPDDELETE2: 7800 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7801 msg->sadb_msg_type); 7802 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7803 error = EINVAL; 7804 goto senderror; 7805 } 7806 break; 7807 case SADB_SATYPE_RSVP: 7808 case SADB_SATYPE_OSPFV2: 7809 case SADB_SATYPE_RIPV2: 7810 case SADB_SATYPE_MIP: 7811 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7812 msg->sadb_msg_satype); 7813 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7814 error = EOPNOTSUPP; 7815 goto senderror; 7816 case 1: /* XXX: What does it do? */ 7817 if (msg->sadb_msg_type == SADB_X_PROMISC) 7818 break; 7819 /*FALLTHROUGH*/ 7820 default: 7821 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7822 msg->sadb_msg_satype); 7823 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7824 error = EINVAL; 7825 goto senderror; 7826 } 7827 7828 /* check field of upper layer protocol and address family */ 7829 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7830 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7831 const struct sadb_address *src0, *dst0; 7832 const struct sockaddr *sa0, *da0; 7833 u_int plen; 7834 7835 src0 = mh.ext[SADB_EXT_ADDRESS_SRC]; 7836 dst0 = mh.ext[SADB_EXT_ADDRESS_DST]; 7837 sa0 = key_msghdr_get_sockaddr(&mh, SADB_EXT_ADDRESS_SRC); 7838 da0 = key_msghdr_get_sockaddr(&mh, SADB_EXT_ADDRESS_DST); 7839 7840 /* check upper layer protocol */ 7841 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7842 IPSECLOG(LOG_DEBUG, 7843 "upper layer protocol mismatched.\n"); 7844 goto invaddr; 7845 } 7846 7847 /* check family */ 7848 if (sa0->sa_family != da0->sa_family) { 7849 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7850 goto invaddr; 7851 } 7852 if (sa0->sa_len != da0->sa_len) { 7853 IPSECLOG(LOG_DEBUG, 7854 "address struct size mismatched.\n"); 7855 goto invaddr; 7856 } 7857 7858 switch (sa0->sa_family) { 7859 case AF_INET: 7860 if (sa0->sa_len != sizeof(struct sockaddr_in)) 7861 goto invaddr; 7862 break; 7863 case AF_INET6: 7864 if (sa0->sa_len != sizeof(struct sockaddr_in6)) 7865 goto invaddr; 7866 break; 7867 default: 7868 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7869 error = EAFNOSUPPORT; 7870 goto senderror; 7871 } 7872 7873 switch (sa0->sa_family) { 7874 case AF_INET: 7875 plen = sizeof(struct in_addr) << 3; 7876 break; 7877 case AF_INET6: 7878 plen = sizeof(struct in6_addr) << 3; 7879 break; 7880 default: 7881 plen = 0; /*fool gcc*/ 7882 break; 7883 } 7884 7885 /* check max prefix length */ 7886 if (src0->sadb_address_prefixlen > plen || 7887 dst0->sadb_address_prefixlen > plen) { 7888 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7889 goto invaddr; 7890 } 7891 7892 /* 7893 * prefixlen == 0 is valid because there can be a case when 7894 * all addresses are matched. 7895 */ 7896 } 7897 7898 if (msg->sadb_msg_type >= __arraycount(key_api_typesw) || 7899 key_api_typesw[msg->sadb_msg_type] == NULL) { 7900 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7901 error = EINVAL; 7902 goto senderror; 7903 } 7904 7905 return (*key_api_typesw[msg->sadb_msg_type])(so, m, &mh); 7906 7907 invaddr: 7908 error = EINVAL; 7909 senderror: 7910 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7911 return key_senderror(so, m, error); 7912 } 7913 7914 static int 7915 key_senderror(struct socket *so, struct mbuf *m, int code) 7916 { 7917 struct sadb_msg *msg; 7918 7919 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7920 7921 if (so == NULL) { 7922 /* 7923 * This means the request comes from kernel. 7924 * As the request comes from kernel, it is unnecessary to 7925 * send message to userland. Just return errcode directly. 7926 */ 7927 m_freem(m); 7928 return code; 7929 } 7930 7931 msg = mtod(m, struct sadb_msg *); 7932 msg->sadb_msg_errno = code; 7933 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7934 } 7935 7936 /* 7937 * set the pointer to each header into message buffer. 7938 * m will be freed on error. 7939 * XXX larger-than-MCLBYTES extension? 7940 */ 7941 static int 7942 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7943 { 7944 struct mbuf *n; 7945 struct sadb_ext *ext; 7946 size_t off, end; 7947 int extlen; 7948 int toff; 7949 7950 KASSERT(m != NULL); 7951 KASSERT(mhp != NULL); 7952 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7953 7954 /* initialize */ 7955 memset(mhp, 0, sizeof(*mhp)); 7956 7957 mhp->msg = mtod(m, struct sadb_msg *); 7958 mhp->ext[0] = mhp->msg; /*XXX backward compat */ 7959 7960 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7961 extlen = end; /*just in case extlen is not updated*/ 7962 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7963 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7964 if (!n) { 7965 /* m is already freed */ 7966 return ENOBUFS; 7967 } 7968 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7969 7970 /* set pointer */ 7971 switch (ext->sadb_ext_type) { 7972 case SADB_EXT_SA: 7973 case SADB_EXT_ADDRESS_SRC: 7974 case SADB_EXT_ADDRESS_DST: 7975 case SADB_EXT_ADDRESS_PROXY: 7976 case SADB_EXT_LIFETIME_CURRENT: 7977 case SADB_EXT_LIFETIME_HARD: 7978 case SADB_EXT_LIFETIME_SOFT: 7979 case SADB_EXT_KEY_AUTH: 7980 case SADB_EXT_KEY_ENCRYPT: 7981 case SADB_EXT_IDENTITY_SRC: 7982 case SADB_EXT_IDENTITY_DST: 7983 case SADB_EXT_SENSITIVITY: 7984 case SADB_EXT_PROPOSAL: 7985 case SADB_EXT_SUPPORTED_AUTH: 7986 case SADB_EXT_SUPPORTED_ENCRYPT: 7987 case SADB_EXT_SPIRANGE: 7988 case SADB_X_EXT_POLICY: 7989 case SADB_X_EXT_SA2: 7990 case SADB_X_EXT_NAT_T_TYPE: 7991 case SADB_X_EXT_NAT_T_SPORT: 7992 case SADB_X_EXT_NAT_T_DPORT: 7993 case SADB_X_EXT_NAT_T_OAI: 7994 case SADB_X_EXT_NAT_T_OAR: 7995 case SADB_X_EXT_NAT_T_FRAG: 7996 /* duplicate check */ 7997 /* 7998 * XXX Are there duplication payloads of either 7999 * KEY_AUTH or KEY_ENCRYPT ? 8000 */ 8001 if (mhp->ext[ext->sadb_ext_type] != NULL) { 8002 IPSECLOG(LOG_DEBUG, 8003 "duplicate ext_type %u is passed.\n", 8004 ext->sadb_ext_type); 8005 m_freem(m); 8006 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 8007 return EINVAL; 8008 } 8009 break; 8010 default: 8011 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 8012 ext->sadb_ext_type); 8013 m_freem(m); 8014 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 8015 return EINVAL; 8016 } 8017 8018 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 8019 8020 if (key_validate_ext(ext, extlen)) { 8021 m_freem(m); 8022 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 8023 return EINVAL; 8024 } 8025 8026 n = m_pulldown(m, off, extlen, &toff); 8027 if (!n) { 8028 /* m is already freed */ 8029 return ENOBUFS; 8030 } 8031 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 8032 8033 mhp->ext[ext->sadb_ext_type] = ext; 8034 mhp->extoff[ext->sadb_ext_type] = off; 8035 mhp->extlen[ext->sadb_ext_type] = extlen; 8036 } 8037 8038 if (off != end) { 8039 m_freem(m); 8040 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 8041 return EINVAL; 8042 } 8043 8044 return 0; 8045 } 8046 8047 static int 8048 key_validate_ext(const struct sadb_ext *ext, int len) 8049 { 8050 const struct sockaddr *sa; 8051 enum { NONE, ADDR } checktype = NONE; 8052 int baselen = 0; 8053 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 8054 8055 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 8056 return EINVAL; 8057 8058 /* if it does not match minimum/maximum length, bail */ 8059 if (ext->sadb_ext_type >= __arraycount(minsize) || 8060 ext->sadb_ext_type >= __arraycount(maxsize)) 8061 return EINVAL; 8062 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 8063 return EINVAL; 8064 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 8065 return EINVAL; 8066 8067 /* more checks based on sadb_ext_type XXX need more */ 8068 switch (ext->sadb_ext_type) { 8069 case SADB_EXT_ADDRESS_SRC: 8070 case SADB_EXT_ADDRESS_DST: 8071 case SADB_EXT_ADDRESS_PROXY: 8072 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 8073 checktype = ADDR; 8074 break; 8075 case SADB_EXT_IDENTITY_SRC: 8076 case SADB_EXT_IDENTITY_DST: 8077 if (((const struct sadb_ident *)ext)->sadb_ident_type == 8078 SADB_X_IDENTTYPE_ADDR) { 8079 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 8080 checktype = ADDR; 8081 } else 8082 checktype = NONE; 8083 break; 8084 default: 8085 checktype = NONE; 8086 break; 8087 } 8088 8089 switch (checktype) { 8090 case NONE: 8091 break; 8092 case ADDR: 8093 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 8094 if (len < baselen + sal) 8095 return EINVAL; 8096 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 8097 return EINVAL; 8098 break; 8099 } 8100 8101 return 0; 8102 } 8103 8104 static int 8105 key_do_init(void) 8106 { 8107 int i, error; 8108 8109 mutex_init(&key_misc.lock, MUTEX_DEFAULT, IPL_NONE); 8110 8111 mutex_init(&key_spd.lock, MUTEX_DEFAULT, IPL_NONE); 8112 cv_init(&key_spd.cv_lc, "key_sp_lc"); 8113 key_spd.psz = pserialize_create(); 8114 cv_init(&key_spd.cv_psz, "key_sp_psz"); 8115 key_spd.psz_performing = false; 8116 8117 mutex_init(&key_sad.lock, MUTEX_DEFAULT, IPL_NONE); 8118 cv_init(&key_sad.cv_lc, "key_sa_lc"); 8119 key_sad.psz = pserialize_create(); 8120 cv_init(&key_sad.cv_psz, "key_sa_psz"); 8121 key_sad.psz_performing = false; 8122 8123 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 8124 8125 callout_init(&key_timehandler_ch, CALLOUT_MPSAFE); 8126 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 8127 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 8128 if (error != 0) 8129 panic("%s: workqueue_create failed (%d)\n", __func__, error); 8130 8131 for (i = 0; i < IPSEC_DIR_MAX; i++) { 8132 PSLIST_INIT(&key_spd.splist[i]); 8133 } 8134 8135 PSLIST_INIT(&key_spd.socksplist); 8136 8137 key_sad.sahlists = hashinit(SAHHASH_NHASH, HASH_PSLIST, true, 8138 &key_sad.sahlistmask); 8139 key_sad.savlut = hashinit(SAVLUT_NHASH, HASH_PSLIST, true, 8140 &key_sad.savlutmask); 8141 8142 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 8143 LIST_INIT(&key_misc.reglist[i]); 8144 } 8145 8146 #ifndef IPSEC_NONBLOCK_ACQUIRE 8147 LIST_INIT(&key_misc.acqlist); 8148 #endif 8149 #ifdef notyet 8150 LIST_INIT(&key_misc.spacqlist); 8151 #endif 8152 8153 /* system default */ 8154 ip4_def_policy.policy = IPSEC_POLICY_NONE; 8155 ip4_def_policy.state = IPSEC_SPSTATE_ALIVE; 8156 localcount_init(&ip4_def_policy.localcount); 8157 8158 #ifdef INET6 8159 ip6_def_policy.policy = IPSEC_POLICY_NONE; 8160 ip6_def_policy.state = IPSEC_SPSTATE_ALIVE; 8161 localcount_init(&ip6_def_policy.localcount); 8162 #endif 8163 8164 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 8165 8166 /* initialize key statistics */ 8167 keystat.getspi_count = 1; 8168 8169 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 8170 8171 return (0); 8172 } 8173 8174 void 8175 key_init(void) 8176 { 8177 static ONCE_DECL(key_init_once); 8178 8179 sysctl_net_keyv2_setup(NULL); 8180 sysctl_net_key_compat_setup(NULL); 8181 8182 RUN_ONCE(&key_init_once, key_do_init); 8183 8184 key_init_so(); 8185 } 8186 8187 /* 8188 * XXX: maybe This function is called after INBOUND IPsec processing. 8189 * 8190 * Special check for tunnel-mode packets. 8191 * We must make some checks for consistency between inner and outer IP header. 8192 * 8193 * xxx more checks to be provided 8194 */ 8195 int 8196 key_checktunnelsanity( 8197 struct secasvar *sav, 8198 u_int family, 8199 void *src, 8200 void *dst 8201 ) 8202 { 8203 8204 /* XXX: check inner IP header */ 8205 8206 return 1; 8207 } 8208 8209 #if 0 8210 #define hostnamelen strlen(hostname) 8211 8212 /* 8213 * Get FQDN for the host. 8214 * If the administrator configured hostname (by hostname(1)) without 8215 * domain name, returns nothing. 8216 */ 8217 static const char * 8218 key_getfqdn(void) 8219 { 8220 int i; 8221 int hasdot; 8222 static char fqdn[MAXHOSTNAMELEN + 1]; 8223 8224 if (!hostnamelen) 8225 return NULL; 8226 8227 /* check if it comes with domain name. */ 8228 hasdot = 0; 8229 for (i = 0; i < hostnamelen; i++) { 8230 if (hostname[i] == '.') 8231 hasdot++; 8232 } 8233 if (!hasdot) 8234 return NULL; 8235 8236 /* NOTE: hostname may not be NUL-terminated. */ 8237 memset(fqdn, 0, sizeof(fqdn)); 8238 memcpy(fqdn, hostname, hostnamelen); 8239 fqdn[hostnamelen] = '\0'; 8240 return fqdn; 8241 } 8242 8243 /* 8244 * get username@FQDN for the host/user. 8245 */ 8246 static const char * 8247 key_getuserfqdn(void) 8248 { 8249 const char *host; 8250 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 8251 struct proc *p = curproc; 8252 char *q; 8253 8254 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 8255 return NULL; 8256 if (!(host = key_getfqdn())) 8257 return NULL; 8258 8259 /* NOTE: s_login may not be-NUL terminated. */ 8260 memset(userfqdn, 0, sizeof(userfqdn)); 8261 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 8262 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 8263 q = userfqdn + strlen(userfqdn); 8264 *q++ = '@'; 8265 memcpy(q, host, strlen(host)); 8266 q += strlen(host); 8267 *q++ = '\0'; 8268 8269 return userfqdn; 8270 } 8271 #endif 8272 8273 /* record data transfer on SA, and update timestamps */ 8274 void 8275 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 8276 { 8277 lifetime_counters_t *counters; 8278 8279 KASSERT(sav != NULL); 8280 KASSERT(sav->lft_c != NULL); 8281 KASSERT(m != NULL); 8282 8283 counters = percpu_getref(sav->lft_c_counters_percpu); 8284 8285 /* 8286 * XXX Currently, there is a difference of bytes size 8287 * between inbound and outbound processing. 8288 */ 8289 (*counters)[LIFETIME_COUNTER_BYTES] += m->m_pkthdr.len; 8290 /* to check bytes lifetime is done in key_timehandler(). */ 8291 8292 /* 8293 * We use the number of packets as the unit of 8294 * sadb_lifetime_allocations. We increment the variable 8295 * whenever {esp,ah}_{in,out}put is called. 8296 */ 8297 (*counters)[LIFETIME_COUNTER_ALLOCATIONS]++; 8298 /* XXX check for expires? */ 8299 8300 percpu_putref(sav->lft_c_counters_percpu); 8301 8302 /* 8303 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 8304 * in seconds. HARD and SOFT lifetime are measured by the time 8305 * difference (again in seconds) from sadb_lifetime_usetime. 8306 * 8307 * usetime 8308 * v expire expire 8309 * -----+-----+--------+---> t 8310 * <--------------> HARD 8311 * <-----> SOFT 8312 */ 8313 sav->lft_c->sadb_lifetime_usetime = time_uptime; 8314 /* XXX check for expires? */ 8315 8316 return; 8317 } 8318 8319 /* dumb version */ 8320 void 8321 key_sa_routechange(struct sockaddr *dst) 8322 { 8323 struct secashead *sah; 8324 int s; 8325 8326 s = pserialize_read_enter(); 8327 SAHLIST_READER_FOREACH(sah) { 8328 struct route *ro; 8329 const struct sockaddr *sa; 8330 8331 key_sah_ref(sah); 8332 pserialize_read_exit(s); 8333 8334 ro = &sah->sa_route; 8335 sa = rtcache_getdst(ro); 8336 if (sa != NULL && dst->sa_len == sa->sa_len && 8337 memcmp(dst, sa, dst->sa_len) == 0) 8338 rtcache_free(ro); 8339 8340 s = pserialize_read_enter(); 8341 key_sah_unref(sah); 8342 } 8343 pserialize_read_exit(s); 8344 8345 return; 8346 } 8347 8348 static void 8349 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 8350 { 8351 struct secasvar *_sav; 8352 8353 ASSERT_SLEEPABLE(); 8354 KASSERT(mutex_owned(&key_sad.lock)); 8355 8356 if (sav->state == state) 8357 return; 8358 8359 key_unlink_sav(sav); 8360 localcount_fini(&sav->localcount); 8361 SAVLIST_ENTRY_DESTROY(sav); 8362 key_init_sav(sav); 8363 8364 sav->state = state; 8365 if (!SADB_SASTATE_USABLE_P(sav)) { 8366 /* We don't need to care about the order */ 8367 SAVLIST_WRITER_INSERT_HEAD(sav->sah, state, sav); 8368 return; 8369 } 8370 /* 8371 * Sort the list by lft_c->sadb_lifetime_addtime 8372 * in ascending order. 8373 */ 8374 SAVLIST_WRITER_FOREACH(_sav, sav->sah, state) { 8375 if (_sav->lft_c->sadb_lifetime_addtime > 8376 sav->lft_c->sadb_lifetime_addtime) { 8377 SAVLIST_WRITER_INSERT_BEFORE(_sav, sav); 8378 break; 8379 } 8380 } 8381 if (_sav == NULL) { 8382 SAVLIST_WRITER_INSERT_TAIL(sav->sah, state, sav); 8383 } 8384 8385 SAVLUT_WRITER_INSERT_HEAD(sav); 8386 8387 key_validate_savlist(sav->sah, state); 8388 } 8389 8390 /* XXX too much? */ 8391 static struct mbuf * 8392 key_alloc_mbuf(int l, int mflag) 8393 { 8394 struct mbuf *m = NULL, *n; 8395 int len, t; 8396 8397 KASSERT(mflag == M_NOWAIT || (mflag == M_WAITOK && !cpu_softintr_p())); 8398 8399 len = l; 8400 while (len > 0) { 8401 MGET(n, mflag, MT_DATA); 8402 if (n && len > MLEN) { 8403 MCLGET(n, mflag); 8404 if ((n->m_flags & M_EXT) == 0) { 8405 m_freem(n); 8406 n = NULL; 8407 } 8408 } 8409 if (!n) { 8410 m_freem(m); 8411 return NULL; 8412 } 8413 8414 n->m_next = NULL; 8415 n->m_len = 0; 8416 n->m_len = M_TRAILINGSPACE(n); 8417 /* use the bottom of mbuf, hoping we can prepend afterwards */ 8418 if (n->m_len > len) { 8419 t = (n->m_len - len) & ~(sizeof(long) - 1); 8420 n->m_data += t; 8421 n->m_len = len; 8422 } 8423 8424 len -= n->m_len; 8425 8426 if (m) 8427 m_cat(m, n); 8428 else 8429 m = n; 8430 } 8431 8432 return m; 8433 } 8434 8435 static struct mbuf * 8436 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 8437 { 8438 struct secashead *sah; 8439 struct secasvar *sav; 8440 u_int16_t proto; 8441 u_int8_t satype; 8442 u_int8_t state; 8443 int cnt; 8444 struct mbuf *m, *n; 8445 8446 KASSERT(mutex_owned(&key_sad.lock)); 8447 8448 /* map satype to proto */ 8449 proto = key_satype2proto(req_satype); 8450 if (proto == 0) { 8451 *errorp = EINVAL; 8452 return (NULL); 8453 } 8454 8455 /* count sav entries to be sent to the userland. */ 8456 cnt = 0; 8457 SAHLIST_WRITER_FOREACH(sah) { 8458 if (req_satype != SADB_SATYPE_UNSPEC && 8459 proto != sah->saidx.proto) 8460 continue; 8461 8462 SASTATE_ANY_FOREACH(state) { 8463 SAVLIST_WRITER_FOREACH(sav, sah, state) { 8464 cnt++; 8465 } 8466 } 8467 } 8468 8469 if (cnt == 0) { 8470 *errorp = ENOENT; 8471 return (NULL); 8472 } 8473 8474 /* send this to the userland, one at a time. */ 8475 m = NULL; 8476 SAHLIST_WRITER_FOREACH(sah) { 8477 if (req_satype != SADB_SATYPE_UNSPEC && 8478 proto != sah->saidx.proto) 8479 continue; 8480 8481 /* map proto to satype */ 8482 satype = key_proto2satype(sah->saidx.proto); 8483 if (satype == 0) { 8484 m_freem(m); 8485 *errorp = EINVAL; 8486 return (NULL); 8487 } 8488 8489 SASTATE_ANY_FOREACH(state) { 8490 SAVLIST_WRITER_FOREACH(sav, sah, state) { 8491 n = key_setdumpsa(sav, SADB_DUMP, satype, 8492 --cnt, pid); 8493 if (!m) 8494 m = n; 8495 else 8496 m_cat(m, n); 8497 } 8498 } 8499 } 8500 8501 if (!m) { 8502 *errorp = EINVAL; 8503 return (NULL); 8504 } 8505 8506 if ((m->m_flags & M_PKTHDR) != 0) { 8507 m->m_pkthdr.len = 0; 8508 for (n = m; n; n = n->m_next) 8509 m->m_pkthdr.len += n->m_len; 8510 } 8511 8512 *errorp = 0; 8513 return (m); 8514 } 8515 8516 static struct mbuf * 8517 key_setspddump(int *errorp, pid_t pid) 8518 { 8519 struct secpolicy *sp; 8520 int cnt; 8521 u_int dir; 8522 struct mbuf *m, *n; 8523 8524 KASSERT(mutex_owned(&key_spd.lock)); 8525 8526 /* search SPD entry and get buffer size. */ 8527 cnt = 0; 8528 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8529 SPLIST_WRITER_FOREACH(sp, dir) { 8530 cnt++; 8531 } 8532 } 8533 8534 if (cnt == 0) { 8535 *errorp = ENOENT; 8536 return (NULL); 8537 } 8538 8539 m = NULL; 8540 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8541 SPLIST_WRITER_FOREACH(sp, dir) { 8542 --cnt; 8543 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8544 8545 if (!m) 8546 m = n; 8547 else { 8548 m->m_pkthdr.len += n->m_pkthdr.len; 8549 m_cat(m, n); 8550 } 8551 } 8552 } 8553 8554 *errorp = 0; 8555 return (m); 8556 } 8557 8558 int 8559 key_get_used(void) { 8560 return !SPLIST_READER_EMPTY(IPSEC_DIR_INBOUND) || 8561 !SPLIST_READER_EMPTY(IPSEC_DIR_OUTBOUND) || 8562 !SOCKSPLIST_READER_EMPTY(); 8563 } 8564 8565 void 8566 key_update_used(void) 8567 { 8568 switch (ipsec_enabled) { 8569 default: 8570 case 0: 8571 #ifdef notyet 8572 /* XXX: racy */ 8573 ipsec_used = 0; 8574 #endif 8575 break; 8576 case 1: 8577 #ifndef notyet 8578 /* XXX: racy */ 8579 if (!ipsec_used) 8580 #endif 8581 ipsec_used = key_get_used(); 8582 break; 8583 case 2: 8584 ipsec_used = 1; 8585 break; 8586 } 8587 } 8588 8589 static inline void 8590 key_savlut_writer_insert_head(struct secasvar *sav) 8591 { 8592 uint32_t hash_key; 8593 uint32_t hash; 8594 8595 KASSERT(mutex_owned(&key_sad.lock)); 8596 KASSERT(!sav->savlut_added); 8597 8598 if (sav->sah->saidx.proto == IPPROTO_IPCOMP) 8599 hash_key = sav->alg_comp; 8600 else 8601 hash_key = sav->spi; 8602 8603 hash = key_savluthash(&sav->sah->saidx.dst.sa, 8604 sav->sah->saidx.proto, hash_key, key_sad.savlutmask); 8605 8606 PSLIST_WRITER_INSERT_HEAD(&key_sad.savlut[hash], sav, 8607 pslist_entry_savlut); 8608 sav->savlut_added = true; 8609 } 8610 8611 /* 8612 * Calculate hash using protocol, source address, 8613 * and destination address included in saidx. 8614 */ 8615 static inline uint32_t 8616 key_saidxhash(const struct secasindex *saidx, u_long mask) 8617 { 8618 uint32_t hash32; 8619 const struct sockaddr_in *sin; 8620 const struct sockaddr_in6 *sin6; 8621 8622 hash32 = saidx->proto; 8623 8624 switch (saidx->src.sa.sa_family) { 8625 case AF_INET: 8626 sin = &saidx->src.sin; 8627 hash32 = hash32_buf(&sin->sin_addr, 8628 sizeof(sin->sin_addr), hash32); 8629 sin = &saidx->dst.sin; 8630 hash32 = hash32_buf(&sin->sin_addr, 8631 sizeof(sin->sin_addr), hash32 << 1); 8632 break; 8633 case AF_INET6: 8634 sin6 = &saidx->src.sin6; 8635 hash32 = hash32_buf(&sin6->sin6_addr, 8636 sizeof(sin6->sin6_addr), hash32); 8637 sin6 = &saidx->dst.sin6; 8638 hash32 = hash32_buf(&sin6->sin6_addr, 8639 sizeof(sin6->sin6_addr), hash32 << 1); 8640 break; 8641 default: 8642 hash32 = 0; 8643 break; 8644 } 8645 8646 return hash32 & mask; 8647 } 8648 8649 /* 8650 * Calculate hash using destination address, protocol, 8651 * and spi. Those parameter depend on the search of 8652 * key_lookup_sa(). 8653 */ 8654 static uint32_t 8655 key_savluthash(const struct sockaddr *dst, uint32_t proto, 8656 uint32_t spi, u_long mask) 8657 { 8658 uint32_t hash32; 8659 const struct sockaddr_in *sin; 8660 const struct sockaddr_in6 *sin6; 8661 8662 hash32 = hash32_buf(&proto, sizeof(proto), spi); 8663 8664 switch(dst->sa_family) { 8665 case AF_INET: 8666 sin = satocsin(dst); 8667 hash32 = hash32_buf(&sin->sin_addr, 8668 sizeof(sin->sin_addr), hash32); 8669 break; 8670 case AF_INET6: 8671 sin6 = satocsin6(dst); 8672 hash32 = hash32_buf(&sin6->sin6_addr, 8673 sizeof(sin6->sin6_addr), hash32); 8674 break; 8675 default: 8676 hash32 = 0; 8677 } 8678 8679 return hash32 & mask; 8680 } 8681 8682 static int 8683 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8684 { 8685 struct mbuf *m, *n; 8686 int err2 = 0; 8687 char *p, *ep; 8688 size_t len; 8689 int error; 8690 8691 if (newp) 8692 return (EPERM); 8693 if (namelen != 1) 8694 return (EINVAL); 8695 8696 mutex_enter(&key_sad.lock); 8697 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8698 mutex_exit(&key_sad.lock); 8699 if (!m) 8700 return (error); 8701 if (!oldp) 8702 *oldlenp = m->m_pkthdr.len; 8703 else { 8704 p = oldp; 8705 if (*oldlenp < m->m_pkthdr.len) { 8706 err2 = ENOMEM; 8707 ep = p + *oldlenp; 8708 } else { 8709 *oldlenp = m->m_pkthdr.len; 8710 ep = p + m->m_pkthdr.len; 8711 } 8712 for (n = m; n; n = n->m_next) { 8713 len = (ep - p < n->m_len) ? 8714 ep - p : n->m_len; 8715 error = copyout(mtod(n, const void *), p, len); 8716 p += len; 8717 if (error) 8718 break; 8719 } 8720 if (error == 0) 8721 error = err2; 8722 } 8723 m_freem(m); 8724 8725 return (error); 8726 } 8727 8728 static int 8729 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8730 { 8731 struct mbuf *m, *n; 8732 int err2 = 0; 8733 char *p, *ep; 8734 size_t len; 8735 int error; 8736 8737 if (newp) 8738 return (EPERM); 8739 if (namelen != 0) 8740 return (EINVAL); 8741 8742 mutex_enter(&key_spd.lock); 8743 m = key_setspddump(&error, l->l_proc->p_pid); 8744 mutex_exit(&key_spd.lock); 8745 if (!m) 8746 return (error); 8747 if (!oldp) 8748 *oldlenp = m->m_pkthdr.len; 8749 else { 8750 p = oldp; 8751 if (*oldlenp < m->m_pkthdr.len) { 8752 err2 = ENOMEM; 8753 ep = p + *oldlenp; 8754 } else { 8755 *oldlenp = m->m_pkthdr.len; 8756 ep = p + m->m_pkthdr.len; 8757 } 8758 for (n = m; n; n = n->m_next) { 8759 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8760 error = copyout(mtod(n, const void *), p, len); 8761 p += len; 8762 if (error) 8763 break; 8764 } 8765 if (error == 0) 8766 error = err2; 8767 } 8768 m_freem(m); 8769 8770 return (error); 8771 } 8772 8773 /* 8774 * Create sysctl tree for native IPSEC key knobs, originally 8775 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8776 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8777 * and in any case the part of our sysctl namespace used for dumping the 8778 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8779 * namespace, for API reasons. 8780 * 8781 * Pending a consensus on the right way to fix this, add a level of 8782 * indirection in how we number the `native' IPSEC key nodes; 8783 * and (as requested by Andrew Brown) move registration of the 8784 * KAME-compatible names to a separate function. 8785 */ 8786 #if 0 8787 # define IPSEC_PFKEY PF_KEY_V2 8788 # define IPSEC_PFKEY_NAME "keyv2" 8789 #else 8790 # define IPSEC_PFKEY PF_KEY 8791 # define IPSEC_PFKEY_NAME "key" 8792 #endif 8793 8794 static int 8795 sysctl_net_key_stats(SYSCTLFN_ARGS) 8796 { 8797 8798 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8799 } 8800 8801 static void 8802 sysctl_net_keyv2_setup(struct sysctllog **clog) 8803 { 8804 8805 sysctl_createv(clog, 0, NULL, NULL, 8806 CTLFLAG_PERMANENT, 8807 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8808 NULL, 0, NULL, 0, 8809 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8810 8811 sysctl_createv(clog, 0, NULL, NULL, 8812 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8813 CTLTYPE_INT, "debug", NULL, 8814 NULL, 0, &key_debug_level, 0, 8815 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8816 sysctl_createv(clog, 0, NULL, NULL, 8817 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8818 CTLTYPE_INT, "spi_try", NULL, 8819 NULL, 0, &key_spi_trycnt, 0, 8820 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8821 sysctl_createv(clog, 0, NULL, NULL, 8822 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8823 CTLTYPE_INT, "spi_min_value", NULL, 8824 NULL, 0, &key_spi_minval, 0, 8825 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8826 sysctl_createv(clog, 0, NULL, NULL, 8827 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8828 CTLTYPE_INT, "spi_max_value", NULL, 8829 NULL, 0, &key_spi_maxval, 0, 8830 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8831 sysctl_createv(clog, 0, NULL, NULL, 8832 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8833 CTLTYPE_INT, "random_int", NULL, 8834 NULL, 0, &key_int_random, 0, 8835 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8836 sysctl_createv(clog, 0, NULL, NULL, 8837 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8838 CTLTYPE_INT, "larval_lifetime", NULL, 8839 NULL, 0, &key_larval_lifetime, 0, 8840 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8841 sysctl_createv(clog, 0, NULL, NULL, 8842 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8843 CTLTYPE_INT, "blockacq_count", NULL, 8844 NULL, 0, &key_blockacq_count, 0, 8845 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8846 sysctl_createv(clog, 0, NULL, NULL, 8847 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8848 CTLTYPE_INT, "blockacq_lifetime", NULL, 8849 NULL, 0, &key_blockacq_lifetime, 0, 8850 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8851 sysctl_createv(clog, 0, NULL, NULL, 8852 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8853 CTLTYPE_INT, "esp_keymin", NULL, 8854 NULL, 0, &ipsec_esp_keymin, 0, 8855 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8856 sysctl_createv(clog, 0, NULL, NULL, 8857 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8858 CTLTYPE_INT, "prefered_oldsa", NULL, 8859 NULL, 0, &key_prefered_oldsa, 0, 8860 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8861 sysctl_createv(clog, 0, NULL, NULL, 8862 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8863 CTLTYPE_INT, "esp_auth", NULL, 8864 NULL, 0, &ipsec_esp_auth, 0, 8865 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8866 sysctl_createv(clog, 0, NULL, NULL, 8867 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8868 CTLTYPE_INT, "ah_keymin", NULL, 8869 NULL, 0, &ipsec_ah_keymin, 0, 8870 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8871 sysctl_createv(clog, 0, NULL, NULL, 8872 CTLFLAG_PERMANENT, 8873 CTLTYPE_STRUCT, "stats", 8874 SYSCTL_DESCR("PF_KEY statistics"), 8875 sysctl_net_key_stats, 0, NULL, 0, 8876 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8877 } 8878 8879 /* 8880 * Register sysctl names used by setkey(8). For historical reasons, 8881 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8882 * for both IPSEC and KAME IPSEC. 8883 */ 8884 static void 8885 sysctl_net_key_compat_setup(struct sysctllog **clog) 8886 { 8887 8888 sysctl_createv(clog, 0, NULL, NULL, 8889 CTLFLAG_PERMANENT, 8890 CTLTYPE_NODE, "key", NULL, 8891 NULL, 0, NULL, 0, 8892 CTL_NET, PF_KEY, CTL_EOL); 8893 8894 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8895 sysctl_createv(clog, 0, NULL, NULL, 8896 CTLFLAG_PERMANENT, 8897 CTLTYPE_STRUCT, "dumpsa", NULL, 8898 sysctl_net_key_dumpsa, 0, NULL, 0, 8899 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8900 sysctl_createv(clog, 0, NULL, NULL, 8901 CTLFLAG_PERMANENT, 8902 CTLTYPE_STRUCT, "dumpsp", NULL, 8903 sysctl_net_key_dumpsp, 0, NULL, 0, 8904 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8905 } 8906
Indexes created Mon Sep 22 13:09:51 GMT 2025