key.c revision 1.253
1 /* $NetBSD: key.c,v 1.253 2018/04/17 04:22:58 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 1.253 2018/04/17 04:22:58 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_ENTRY_INIT(sav) \ 422 PSLIST_ENTRY_INIT((sav), pslist_entry_savlut) 423 #define SAVLUT_READER_FOREACH(sav, dst, proto, hash_key) \ 424 PSLIST_READER_FOREACH((sav), \ 425 &key_sad.savlut[key_savluthash(dst, proto, hash_key, \ 426 key_sad.savlutmask)], \ 427 struct secasvar, pslist_entry_savlut) 428 #define SAVLUT_WRITER_INSERT_HEAD(sav) \ 429 key_savlut_writer_insert_head((sav)) 430 #define SAVLUT_WRITER_REMOVE(sav) \ 431 do { \ 432 if (!(sav)->savlut_added) \ 433 break; \ 434 PSLIST_WRITER_REMOVE((sav), pslist_entry_savlut); \ 435 (sav)->savlut_added = false; \ 436 } while(0) 437 438 /* search order for SAs */ 439 /* 440 * This order is important because we must select the oldest SA 441 * for outbound processing. For inbound, This is not important. 442 */ 443 static const u_int saorder_state_valid_prefer_old[] = { 444 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 445 }; 446 static const u_int saorder_state_valid_prefer_new[] = { 447 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 448 }; 449 450 static const u_int saorder_state_alive[] = { 451 /* except DEAD */ 452 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 453 }; 454 static const u_int saorder_state_any[] = { 455 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 456 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 457 }; 458 459 #define SASTATE_ALIVE_FOREACH(s) \ 460 for (int _i = 0; \ 461 _i < __arraycount(saorder_state_alive) ? \ 462 (s) = saorder_state_alive[_i], true : false; \ 463 _i++) 464 #define SASTATE_ANY_FOREACH(s) \ 465 for (int _i = 0; \ 466 _i < __arraycount(saorder_state_any) ? \ 467 (s) = saorder_state_any[_i], true : false; \ 468 _i++) 469 #define SASTATE_USABLE_FOREACH(s) \ 470 for (int _i = 0; \ 471 _i < __arraycount(saorder_state_valid_prefer_new) ? \ 472 (s) = saorder_state_valid_prefer_new[_i], \ 473 true : false; \ 474 _i++) 475 476 static const int minsize[] = { 477 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 478 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 479 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 480 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 481 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 482 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 483 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 484 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 485 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 486 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 487 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 488 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 489 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 490 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 491 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 492 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 493 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 494 0, /* SADB_X_EXT_KMPRIVATE */ 495 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 496 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 497 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 498 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 499 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 500 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 501 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 502 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 503 }; 504 static const int maxsize[] = { 505 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 506 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 507 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 508 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 509 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 510 0, /* SADB_EXT_ADDRESS_SRC */ 511 0, /* SADB_EXT_ADDRESS_DST */ 512 0, /* SADB_EXT_ADDRESS_PROXY */ 513 0, /* SADB_EXT_KEY_AUTH */ 514 0, /* SADB_EXT_KEY_ENCRYPT */ 515 0, /* SADB_EXT_IDENTITY_SRC */ 516 0, /* SADB_EXT_IDENTITY_DST */ 517 0, /* SADB_EXT_SENSITIVITY */ 518 0, /* SADB_EXT_PROPOSAL */ 519 0, /* SADB_EXT_SUPPORTED_AUTH */ 520 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 521 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 522 0, /* SADB_X_EXT_KMPRIVATE */ 523 0, /* SADB_X_EXT_POLICY */ 524 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 525 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 526 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 527 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 528 0, /* SADB_X_EXT_NAT_T_OAI */ 529 0, /* SADB_X_EXT_NAT_T_OAR */ 530 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 531 }; 532 533 static int ipsec_esp_keymin = 256; 534 static int ipsec_esp_auth = 0; 535 static int ipsec_ah_keymin = 128; 536 537 #ifdef SYSCTL_DECL 538 SYSCTL_DECL(_net_key); 539 #endif 540 541 #ifdef SYSCTL_INT 542 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 543 &key_debug_level, 0, ""); 544 545 /* max count of trial for the decision of spi value */ 546 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 547 &key_spi_trycnt, 0, ""); 548 549 /* minimum spi value to allocate automatically. */ 550 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 551 &key_spi_minval, 0, ""); 552 553 /* maximun spi value to allocate automatically. */ 554 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 555 &key_spi_maxval, 0, ""); 556 557 /* interval to initialize randseed */ 558 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 559 &key_int_random, 0, ""); 560 561 /* lifetime for larval SA */ 562 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 563 &key_larval_lifetime, 0, ""); 564 565 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 566 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 567 &key_blockacq_count, 0, ""); 568 569 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 570 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 571 &key_blockacq_lifetime, 0, ""); 572 573 /* ESP auth */ 574 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 575 &ipsec_esp_auth, 0, ""); 576 577 /* minimum ESP key length */ 578 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 579 &ipsec_esp_keymin, 0, ""); 580 581 /* minimum AH key length */ 582 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 583 &ipsec_ah_keymin, 0, ""); 584 585 /* perfered old SA rather than new SA */ 586 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 587 &key_prefered_oldsa, 0, ""); 588 #endif /* SYSCTL_INT */ 589 590 #define __LIST_CHAINED(elm) \ 591 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 592 #define LIST_INSERT_TAIL(head, elm, type, field) \ 593 do {\ 594 struct type *curelm = LIST_FIRST(head); \ 595 if (curelm == NULL) {\ 596 LIST_INSERT_HEAD(head, elm, field); \ 597 } else { \ 598 while (LIST_NEXT(curelm, field)) \ 599 curelm = LIST_NEXT(curelm, field);\ 600 LIST_INSERT_AFTER(curelm, elm, field);\ 601 }\ 602 } while (0) 603 604 #define KEY_CHKSASTATE(head, sav) \ 605 /* do */ { \ 606 if ((head) != (sav)) { \ 607 IPSECLOG(LOG_DEBUG, \ 608 "state mismatched (TREE=%d SA=%d)\n", \ 609 (head), (sav)); \ 610 continue; \ 611 } \ 612 } /* while (0) */ 613 614 #define KEY_CHKSPDIR(head, sp) \ 615 do { \ 616 if ((head) != (sp)) { \ 617 IPSECLOG(LOG_DEBUG, \ 618 "direction mismatched (TREE=%d SP=%d), anyway continue.\n",\ 619 (head), (sp)); \ 620 } \ 621 } while (0) 622 623 /* 624 * set parameters into secasindex buffer. 625 * Must allocate secasindex buffer before calling this function. 626 */ 627 static int 628 key_setsecasidx(int, int, int, const struct sockaddr *, 629 const struct sockaddr *, struct secasindex *); 630 631 /* key statistics */ 632 struct _keystat { 633 u_long getspi_count; /* the avarage of count to try to get new SPI */ 634 } keystat; 635 636 static void 637 key_init_spidx_bymsghdr(struct secpolicyindex *, const struct sadb_msghdr *); 638 639 static const struct sockaddr * 640 key_msghdr_get_sockaddr(const struct sadb_msghdr *mhp, int idx) 641 { 642 643 return PFKEY_ADDR_SADDR(mhp->ext[idx]); 644 } 645 646 static void 647 key_fill_replymsg(struct mbuf *m, int seq) 648 { 649 struct sadb_msg *msg; 650 651 KASSERT(m->m_len >= sizeof(*msg)); 652 653 msg = mtod(m, struct sadb_msg *); 654 msg->sadb_msg_errno = 0; 655 msg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 656 if (seq != 0) 657 msg->sadb_msg_seq = seq; 658 } 659 660 #if 0 661 static void key_freeso(struct socket *); 662 static void key_freesp_so(struct secpolicy **); 663 #endif 664 static struct secpolicy *key_getsp (const struct secpolicyindex *); 665 static struct secpolicy *key_getspbyid (u_int32_t); 666 static struct secpolicy *key_lookup_and_remove_sp(const struct secpolicyindex *, bool); 667 static struct secpolicy *key_lookupbyid_and_remove_sp(u_int32_t, bool); 668 static void key_destroy_sp(struct secpolicy *); 669 static struct mbuf *key_gather_mbuf (struct mbuf *, 670 const struct sadb_msghdr *, int, int, ...); 671 static int key_api_spdadd(struct socket *, struct mbuf *, 672 const struct sadb_msghdr *); 673 static u_int32_t key_getnewspid (void); 674 static int key_api_spddelete(struct socket *, struct mbuf *, 675 const struct sadb_msghdr *); 676 static int key_api_spddelete2(struct socket *, struct mbuf *, 677 const struct sadb_msghdr *); 678 static int key_api_spdget(struct socket *, struct mbuf *, 679 const struct sadb_msghdr *); 680 static int key_api_spdflush(struct socket *, struct mbuf *, 681 const struct sadb_msghdr *); 682 static int key_api_spddump(struct socket *, struct mbuf *, 683 const struct sadb_msghdr *); 684 static struct mbuf * key_setspddump (int *errorp, pid_t); 685 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 686 static int key_api_nat_map(struct socket *, struct mbuf *, 687 const struct sadb_msghdr *); 688 static struct mbuf *key_setdumpsp (struct secpolicy *, 689 u_int8_t, u_int32_t, pid_t); 690 static u_int key_getspreqmsglen (const struct secpolicy *); 691 static int key_spdexpire (struct secpolicy *); 692 static struct secashead *key_newsah (const struct secasindex *); 693 static void key_unlink_sah(struct secashead *); 694 static void key_destroy_sah(struct secashead *); 695 static bool key_sah_has_sav(struct secashead *); 696 static void key_sah_ref(struct secashead *); 697 static void key_sah_unref(struct secashead *); 698 static void key_init_sav(struct secasvar *); 699 static void key_destroy_sav(struct secasvar *); 700 static void key_destroy_sav_with_ref(struct secasvar *); 701 static struct secasvar *key_newsav(struct mbuf *, 702 const struct sadb_msghdr *, int *, const char*, int); 703 #define KEY_NEWSAV(m, sadb, e) \ 704 key_newsav(m, sadb, e, __func__, __LINE__) 705 static void key_delsav (struct secasvar *); 706 static struct secashead *key_getsah(const struct secasindex *, int); 707 static struct secashead *key_getsah_ref(const struct secasindex *, int); 708 static bool key_checkspidup(const struct secasindex *, u_int32_t); 709 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 710 static int key_setsaval (struct secasvar *, struct mbuf *, 711 const struct sadb_msghdr *); 712 static void key_freesaval(struct secasvar *); 713 static int key_init_xform(struct secasvar *); 714 static void key_clear_xform(struct secasvar *); 715 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 716 u_int8_t, u_int32_t, u_int32_t); 717 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 718 static struct mbuf *key_setsadbxtype (u_int16_t); 719 static struct mbuf *key_setsadbxfrag (u_int16_t); 720 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 721 static int key_checksalen (const union sockaddr_union *); 722 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 723 u_int32_t, pid_t, u_int16_t, int); 724 static struct mbuf *key_setsadbsa (struct secasvar *); 725 static struct mbuf *key_setsadbaddr(u_int16_t, 726 const struct sockaddr *, u_int8_t, u_int16_t, int); 727 #if 0 728 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 729 int, u_int64_t); 730 #endif 731 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 732 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 733 u_int32_t, int); 734 static void *key_newbuf (const void *, u_int); 735 #ifdef INET6 736 static int key_ismyaddr6 (const struct sockaddr_in6 *); 737 #endif 738 739 static void sysctl_net_keyv2_setup(struct sysctllog **); 740 static void sysctl_net_key_compat_setup(struct sysctllog **); 741 742 /* flags for key_saidx_match() */ 743 #define CMP_HEAD 1 /* protocol, addresses. */ 744 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 745 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 746 #define CMP_EXACTLY 4 /* all elements. */ 747 static int key_saidx_match(const struct secasindex *, 748 const struct secasindex *, int); 749 750 static int key_sockaddr_match(const struct sockaddr *, 751 const struct sockaddr *, int); 752 static int key_bb_match_withmask(const void *, const void *, u_int); 753 static u_int16_t key_satype2proto (u_int8_t); 754 static u_int8_t key_proto2satype (u_int16_t); 755 756 static int key_spidx_match_exactly(const struct secpolicyindex *, 757 const struct secpolicyindex *); 758 static int key_spidx_match_withmask(const struct secpolicyindex *, 759 const struct secpolicyindex *); 760 761 static int key_api_getspi(struct socket *, struct mbuf *, 762 const struct sadb_msghdr *); 763 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 764 const struct secasindex *); 765 static int key_handle_natt_info (struct secasvar *, 766 const struct sadb_msghdr *); 767 static int key_set_natt_ports (union sockaddr_union *, 768 union sockaddr_union *, 769 const struct sadb_msghdr *); 770 static int key_api_update(struct socket *, struct mbuf *, 771 const struct sadb_msghdr *); 772 #ifdef IPSEC_DOSEQCHECK 773 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 774 #endif 775 static int key_api_add(struct socket *, struct mbuf *, 776 const struct sadb_msghdr *); 777 static int key_setident (struct secashead *, struct mbuf *, 778 const struct sadb_msghdr *); 779 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 780 const struct sadb_msghdr *); 781 static int key_api_delete(struct socket *, struct mbuf *, 782 const struct sadb_msghdr *); 783 static int key_api_get(struct socket *, struct mbuf *, 784 const struct sadb_msghdr *); 785 786 static void key_getcomb_setlifetime (struct sadb_comb *); 787 static struct mbuf *key_getcomb_esp(int); 788 static struct mbuf *key_getcomb_ah(int); 789 static struct mbuf *key_getcomb_ipcomp(int); 790 static struct mbuf *key_getprop(const struct secasindex *, int); 791 792 static int key_acquire(const struct secasindex *, const struct secpolicy *, 793 int); 794 static int key_acquire_sendup_mbuf_later(struct mbuf *); 795 static void key_acquire_sendup_pending_mbuf(void); 796 #ifndef IPSEC_NONBLOCK_ACQUIRE 797 static struct secacq *key_newacq (const struct secasindex *); 798 static struct secacq *key_getacq (const struct secasindex *); 799 static struct secacq *key_getacqbyseq (u_int32_t); 800 #endif 801 #ifdef notyet 802 static struct secspacq *key_newspacq (const struct secpolicyindex *); 803 static struct secspacq *key_getspacq (const struct secpolicyindex *); 804 #endif 805 static int key_api_acquire(struct socket *, struct mbuf *, 806 const struct sadb_msghdr *); 807 static int key_api_register(struct socket *, struct mbuf *, 808 const struct sadb_msghdr *); 809 static int key_expire (struct secasvar *); 810 static int key_api_flush(struct socket *, struct mbuf *, 811 const struct sadb_msghdr *); 812 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 813 int *lenp, pid_t pid); 814 static int key_api_dump(struct socket *, struct mbuf *, 815 const struct sadb_msghdr *); 816 static int key_api_promisc(struct socket *, struct mbuf *, 817 const struct sadb_msghdr *); 818 static int key_senderror (struct socket *, struct mbuf *, int); 819 static int key_validate_ext (const struct sadb_ext *, int); 820 static int key_align (struct mbuf *, struct sadb_msghdr *); 821 #if 0 822 static const char *key_getfqdn (void); 823 static const char *key_getuserfqdn (void); 824 #endif 825 static void key_sa_chgstate (struct secasvar *, u_int8_t); 826 827 static struct mbuf *key_alloc_mbuf(int, int); 828 static struct mbuf *key_alloc_mbuf_simple(int, int); 829 830 static void key_timehandler(void *); 831 static void key_timehandler_work(struct work *, void *); 832 static struct callout key_timehandler_ch; 833 static struct workqueue *key_timehandler_wq; 834 static struct work key_timehandler_wk; 835 836 static inline void 837 key_savlut_writer_insert_head(struct secasvar *sav); 838 static inline uint32_t 839 key_saidxhash(const struct secasindex *, u_long); 840 static inline uint32_t 841 key_savluthash(const struct sockaddr *, 842 uint32_t, uint32_t, u_long); 843 844 /* 845 * Utilities for percpu counters for sadb_lifetime_allocations and 846 * sadb_lifetime_bytes. 847 */ 848 #define LIFETIME_COUNTER_ALLOCATIONS 0 849 #define LIFETIME_COUNTER_BYTES 1 850 #define LIFETIME_COUNTER_SIZE 2 851 852 typedef uint64_t lifetime_counters_t[LIFETIME_COUNTER_SIZE]; 853 854 static void 855 key_sum_lifetime_counters(void *p, void *arg, struct cpu_info *ci __unused) 856 { 857 lifetime_counters_t *one = p; 858 lifetime_counters_t *sum = arg; 859 860 (*sum)[LIFETIME_COUNTER_ALLOCATIONS] += (*one)[LIFETIME_COUNTER_ALLOCATIONS]; 861 (*sum)[LIFETIME_COUNTER_BYTES] += (*one)[LIFETIME_COUNTER_BYTES]; 862 } 863 864 u_int 865 key_sp_refcnt(const struct secpolicy *sp) 866 { 867 868 /* FIXME */ 869 return 0; 870 } 871 872 static void 873 key_spd_pserialize_perform(void) 874 { 875 876 KASSERT(mutex_owned(&key_spd.lock)); 877 878 while (key_spd.psz_performing) 879 cv_wait(&key_spd.cv_psz, &key_spd.lock); 880 key_spd.psz_performing = true; 881 mutex_exit(&key_spd.lock); 882 883 pserialize_perform(key_spd.psz); 884 885 mutex_enter(&key_spd.lock); 886 key_spd.psz_performing = false; 887 cv_broadcast(&key_spd.cv_psz); 888 } 889 890 /* 891 * Remove the sp from the key_spd.splist and wait for references to the sp 892 * to be released. key_spd.lock must be held. 893 */ 894 static void 895 key_unlink_sp(struct secpolicy *sp) 896 { 897 898 KASSERT(mutex_owned(&key_spd.lock)); 899 900 sp->state = IPSEC_SPSTATE_DEAD; 901 SPLIST_WRITER_REMOVE(sp); 902 903 /* Invalidate all cached SPD pointers in the PCBs. */ 904 ipsec_invalpcbcacheall(); 905 906 KDASSERT(mutex_ownable(softnet_lock)); 907 key_spd_pserialize_perform(); 908 909 localcount_drain(&sp->localcount, &key_spd.cv_lc, &key_spd.lock); 910 } 911 912 /* 913 * Return 0 when there are known to be no SP's for the specified 914 * direction. Otherwise return 1. This is used by IPsec code 915 * to optimize performance. 916 */ 917 int 918 key_havesp(u_int dir) 919 { 920 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 921 !SPLIST_READER_EMPTY(dir) : 1); 922 } 923 924 /* %%% IPsec policy management */ 925 /* 926 * allocating a SP for OUTBOUND or INBOUND packet. 927 * Must call key_freesp() later. 928 * OUT: NULL: not found 929 * others: found and return the pointer. 930 */ 931 struct secpolicy * 932 key_lookup_sp_byspidx(const struct secpolicyindex *spidx, 933 u_int dir, const char* where, int tag) 934 { 935 struct secpolicy *sp; 936 int s; 937 938 KASSERT(spidx != NULL); 939 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 940 941 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 942 943 /* get a SP entry */ 944 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 945 kdebug_secpolicyindex("objects", spidx); 946 } 947 948 s = pserialize_read_enter(); 949 SPLIST_READER_FOREACH(sp, dir) { 950 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 951 kdebug_secpolicyindex("in SPD", &sp->spidx); 952 } 953 954 if (sp->state == IPSEC_SPSTATE_DEAD) 955 continue; 956 if (key_spidx_match_withmask(&sp->spidx, spidx)) 957 goto found; 958 } 959 sp = NULL; 960 found: 961 if (sp) { 962 /* sanity check */ 963 KEY_CHKSPDIR(sp->spidx.dir, dir); 964 965 /* found a SPD entry */ 966 sp->lastused = time_uptime; 967 key_sp_ref(sp, where, tag); 968 } 969 pserialize_read_exit(s); 970 971 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 972 "DP return SP:%p (ID=%u) refcnt %u\n", 973 sp, sp ? sp->id : 0, key_sp_refcnt(sp)); 974 return sp; 975 } 976 977 /* 978 * return a policy that matches this particular inbound packet. 979 * XXX slow 980 */ 981 struct secpolicy * 982 key_gettunnel(const struct sockaddr *osrc, 983 const struct sockaddr *odst, 984 const struct sockaddr *isrc, 985 const struct sockaddr *idst, 986 const char* where, int tag) 987 { 988 struct secpolicy *sp; 989 const int dir = IPSEC_DIR_INBOUND; 990 int s; 991 struct ipsecrequest *r1, *r2, *p; 992 struct secpolicyindex spidx; 993 994 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 995 996 if (isrc->sa_family != idst->sa_family) { 997 IPSECLOG(LOG_ERR, "protocol family mismatched %d != %d\n.", 998 isrc->sa_family, idst->sa_family); 999 sp = NULL; 1000 goto done; 1001 } 1002 1003 s = pserialize_read_enter(); 1004 SPLIST_READER_FOREACH(sp, dir) { 1005 if (sp->state == IPSEC_SPSTATE_DEAD) 1006 continue; 1007 1008 r1 = r2 = NULL; 1009 for (p = sp->req; p; p = p->next) { 1010 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 1011 continue; 1012 1013 r1 = r2; 1014 r2 = p; 1015 1016 if (!r1) { 1017 /* here we look at address matches only */ 1018 spidx = sp->spidx; 1019 if (isrc->sa_len > sizeof(spidx.src) || 1020 idst->sa_len > sizeof(spidx.dst)) 1021 continue; 1022 memcpy(&spidx.src, isrc, isrc->sa_len); 1023 memcpy(&spidx.dst, idst, idst->sa_len); 1024 if (!key_spidx_match_withmask(&sp->spidx, &spidx)) 1025 continue; 1026 } else { 1027 if (!key_sockaddr_match(&r1->saidx.src.sa, isrc, PORT_NONE) || 1028 !key_sockaddr_match(&r1->saidx.dst.sa, idst, PORT_NONE)) 1029 continue; 1030 } 1031 1032 if (!key_sockaddr_match(&r2->saidx.src.sa, osrc, PORT_NONE) || 1033 !key_sockaddr_match(&r2->saidx.dst.sa, odst, PORT_NONE)) 1034 continue; 1035 1036 goto found; 1037 } 1038 } 1039 sp = NULL; 1040 found: 1041 if (sp) { 1042 sp->lastused = time_uptime; 1043 key_sp_ref(sp, where, tag); 1044 } 1045 pserialize_read_exit(s); 1046 done: 1047 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1048 "DP return SP:%p (ID=%u) refcnt %u\n", 1049 sp, sp ? sp->id : 0, key_sp_refcnt(sp)); 1050 return sp; 1051 } 1052 1053 /* 1054 * allocating an SA entry for an *OUTBOUND* packet. 1055 * checking each request entries in SP, and acquire an SA if need. 1056 * OUT: 0: there are valid requests. 1057 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 1058 */ 1059 int 1060 key_checkrequest(const struct ipsecrequest *isr, const struct secasindex *saidx, 1061 struct secasvar **ret) 1062 { 1063 u_int level; 1064 int error; 1065 struct secasvar *sav; 1066 1067 KASSERT(isr != NULL); 1068 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 1069 saidx->mode == IPSEC_MODE_TUNNEL, 1070 "unexpected policy %u", saidx->mode); 1071 1072 /* get current level */ 1073 level = ipsec_get_reqlevel(isr); 1074 1075 /* 1076 * XXX guard against protocol callbacks from the crypto 1077 * thread as they reference ipsecrequest.sav which we 1078 * temporarily null out below. Need to rethink how we 1079 * handle bundled SA's in the callback thread. 1080 */ 1081 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 1082 1083 sav = key_lookup_sa_bysaidx(saidx); 1084 if (sav != NULL) { 1085 *ret = sav; 1086 return 0; 1087 } 1088 1089 /* there is no SA */ 1090 error = key_acquire(saidx, isr->sp, M_NOWAIT); 1091 if (error != 0) { 1092 /* XXX What should I do ? */ 1093 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 1094 error); 1095 return error; 1096 } 1097 1098 if (level != IPSEC_LEVEL_REQUIRE) { 1099 /* XXX sigh, the interface to this routine is botched */ 1100 *ret = NULL; 1101 return 0; 1102 } else { 1103 return ENOENT; 1104 } 1105 } 1106 1107 /* 1108 * looking up a SA for policy entry from SAD. 1109 * NOTE: searching SAD of aliving state. 1110 * OUT: NULL: not found. 1111 * others: found and return the pointer. 1112 */ 1113 struct secasvar * 1114 key_lookup_sa_bysaidx(const struct secasindex *saidx) 1115 { 1116 struct secashead *sah; 1117 struct secasvar *sav = NULL; 1118 u_int stateidx, state; 1119 const u_int *saorder_state_valid; 1120 int arraysize; 1121 int s; 1122 1123 s = pserialize_read_enter(); 1124 sah = key_getsah(saidx, CMP_MODE_REQID); 1125 if (sah == NULL) 1126 goto out; 1127 1128 /* 1129 * search a valid state list for outbound packet. 1130 * This search order is important. 1131 */ 1132 if (key_prefered_oldsa) { 1133 saorder_state_valid = saorder_state_valid_prefer_old; 1134 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1135 } else { 1136 saorder_state_valid = saorder_state_valid_prefer_new; 1137 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1138 } 1139 1140 /* search valid state */ 1141 for (stateidx = 0; 1142 stateidx < arraysize; 1143 stateidx++) { 1144 1145 state = saorder_state_valid[stateidx]; 1146 1147 if (key_prefered_oldsa) 1148 sav = SAVLIST_READER_FIRST(sah, state); 1149 else { 1150 /* XXX need O(1) lookup */ 1151 struct secasvar *last = NULL; 1152 1153 SAVLIST_READER_FOREACH(sav, sah, state) 1154 last = sav; 1155 sav = last; 1156 } 1157 if (sav != NULL) { 1158 KEY_SA_REF(sav); 1159 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1160 "DP cause refcnt++:%d SA:%p\n", 1161 key_sa_refcnt(sav), sav); 1162 break; 1163 } 1164 } 1165 out: 1166 pserialize_read_exit(s); 1167 1168 return sav; 1169 } 1170 1171 #if 0 1172 static void 1173 key_sendup_message_delete(struct secasvar *sav) 1174 { 1175 struct mbuf *m, *result = 0; 1176 uint8_t satype; 1177 1178 satype = key_proto2satype(sav->sah->saidx.proto); 1179 if (satype == 0) 1180 goto msgfail; 1181 1182 m = key_setsadbmsg(SADB_DELETE, 0, satype, 0, 0, key_sa_refcnt(sav) - 1); 1183 if (m == NULL) 1184 goto msgfail; 1185 result = m; 1186 1187 /* set sadb_address for saidx's. */ 1188 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 1189 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 1190 if (m == NULL) 1191 goto msgfail; 1192 m_cat(result, m); 1193 1194 /* set sadb_address for saidx's. */ 1195 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.src.sa, 1196 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 1197 if (m == NULL) 1198 goto msgfail; 1199 m_cat(result, m); 1200 1201 /* create SA extension */ 1202 m = key_setsadbsa(sav); 1203 if (m == NULL) 1204 goto msgfail; 1205 m_cat(result, m); 1206 1207 if (result->m_len < sizeof(struct sadb_msg)) { 1208 result = m_pullup(result, sizeof(struct sadb_msg)); 1209 if (result == NULL) 1210 goto msgfail; 1211 } 1212 1213 result->m_pkthdr.len = 0; 1214 for (m = result; m; m = m->m_next) 1215 result->m_pkthdr.len += m->m_len; 1216 mtod(result, struct sadb_msg *)->sadb_msg_len = 1217 PFKEY_UNIT64(result->m_pkthdr.len); 1218 1219 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1220 result = NULL; 1221 msgfail: 1222 if (result) 1223 m_freem(result); 1224 } 1225 #endif 1226 1227 /* 1228 * allocating a usable SA entry for a *INBOUND* packet. 1229 * Must call key_freesav() later. 1230 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1231 * NULL: not found, or error occurred. 1232 * 1233 * In the comparison, no source address is used--for RFC2401 conformance. 1234 * To quote, from section 4.1: 1235 * A security association is uniquely identified by a triple consisting 1236 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1237 * security protocol (AH or ESP) identifier. 1238 * Note that, however, we do need to keep source address in IPsec SA. 1239 * IKE specification and PF_KEY specification do assume that we 1240 * keep source address in IPsec SA. We see a tricky situation here. 1241 * 1242 * sport and dport are used for NAT-T. network order is always used. 1243 */ 1244 struct secasvar * 1245 key_lookup_sa( 1246 const union sockaddr_union *dst, 1247 u_int proto, 1248 u_int32_t spi, 1249 u_int16_t sport, 1250 u_int16_t dport, 1251 const char* where, int tag) 1252 { 1253 struct secasvar *sav; 1254 int chkport; 1255 int s; 1256 1257 int must_check_spi = 1; 1258 int must_check_alg = 0; 1259 u_int16_t cpi = 0; 1260 u_int8_t algo = 0; 1261 uint32_t hash_key = spi; 1262 1263 if ((sport != 0) && (dport != 0)) 1264 chkport = PORT_STRICT; 1265 else 1266 chkport = PORT_NONE; 1267 1268 KASSERT(dst != NULL); 1269 1270 /* 1271 * XXX IPCOMP case 1272 * We use cpi to define spi here. In the case where cpi <= 1273 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1274 * the real spi. In this case, don't check the spi but check the 1275 * algorithm 1276 */ 1277 1278 if (proto == IPPROTO_IPCOMP) { 1279 u_int32_t tmp; 1280 tmp = ntohl(spi); 1281 cpi = (u_int16_t) tmp; 1282 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1283 algo = (u_int8_t) cpi; 1284 hash_key = algo; 1285 must_check_spi = 0; 1286 must_check_alg = 1; 1287 } 1288 } 1289 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1290 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1291 where, tag, must_check_spi, must_check_alg); 1292 1293 1294 /* 1295 * searching SAD. 1296 * XXX: to be checked internal IP header somewhere. Also when 1297 * IPsec tunnel packet is received. But ESP tunnel mode is 1298 * encrypted so we can't check internal IP header. 1299 */ 1300 s = pserialize_read_enter(); 1301 SAVLUT_READER_FOREACH(sav, &dst->sa, proto, hash_key) { 1302 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1303 "try match spi %#x, %#x\n", 1304 ntohl(spi), ntohl(sav->spi)); 1305 1306 /* do not return entries w/ unusable state */ 1307 if (!SADB_SASTATE_USABLE_P(sav)) { 1308 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1309 "bad state %d\n", sav->state); 1310 continue; 1311 } 1312 if (proto != sav->sah->saidx.proto) { 1313 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1314 "proto fail %d != %d\n", 1315 proto, sav->sah->saidx.proto); 1316 continue; 1317 } 1318 if (must_check_spi && spi != sav->spi) { 1319 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1320 "spi fail %#x != %#x\n", 1321 ntohl(spi), ntohl(sav->spi)); 1322 continue; 1323 } 1324 /* XXX only on the ipcomp case */ 1325 if (must_check_alg && algo != sav->alg_comp) { 1326 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1327 "algo fail %d != %d\n", 1328 algo, sav->alg_comp); 1329 continue; 1330 } 1331 1332 #if 0 /* don't check src */ 1333 /* Fix port in src->sa */ 1334 1335 /* check src address */ 1336 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1337 continue; 1338 #endif 1339 /* fix port of dst address XXX*/ 1340 key_porttosaddr(__UNCONST(dst), dport); 1341 /* check dst address */ 1342 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1343 continue; 1344 key_sa_ref(sav, where, tag); 1345 goto done; 1346 } 1347 sav = NULL; 1348 done: 1349 pserialize_read_exit(s); 1350 1351 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1352 "DP return SA:%p; refcnt %u\n", sav, key_sa_refcnt(sav)); 1353 return sav; 1354 } 1355 1356 static void 1357 key_validate_savlist(const struct secashead *sah, const u_int state) 1358 { 1359 #ifdef DEBUG 1360 struct secasvar *sav, *next; 1361 int s; 1362 1363 /* 1364 * The list should be sorted by lft_c->sadb_lifetime_addtime 1365 * in ascending order. 1366 */ 1367 s = pserialize_read_enter(); 1368 SAVLIST_READER_FOREACH(sav, sah, state) { 1369 next = SAVLIST_READER_NEXT(sav); 1370 if (next != NULL && 1371 sav->lft_c != NULL && next->lft_c != NULL) { 1372 KDASSERTMSG(sav->lft_c->sadb_lifetime_addtime <= 1373 next->lft_c->sadb_lifetime_addtime, 1374 "savlist is not sorted: sah=%p, state=%d, " 1375 "sav=%" PRIu64 ", next=%" PRIu64, sah, state, 1376 sav->lft_c->sadb_lifetime_addtime, 1377 next->lft_c->sadb_lifetime_addtime); 1378 } 1379 } 1380 pserialize_read_exit(s); 1381 #endif 1382 } 1383 1384 void 1385 key_init_sp(struct secpolicy *sp) 1386 { 1387 1388 ASSERT_SLEEPABLE(); 1389 1390 sp->state = IPSEC_SPSTATE_ALIVE; 1391 if (sp->policy == IPSEC_POLICY_IPSEC) 1392 KASSERT(sp->req != NULL); 1393 localcount_init(&sp->localcount); 1394 SPLIST_ENTRY_INIT(sp); 1395 } 1396 1397 /* 1398 * Must be called in a pserialize read section. A held SP 1399 * must be released by key_sp_unref after use. 1400 */ 1401 void 1402 key_sp_ref(struct secpolicy *sp, const char* where, int tag) 1403 { 1404 1405 localcount_acquire(&sp->localcount); 1406 1407 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1408 "DP SP:%p (ID=%u) from %s:%u; refcnt++ now %u\n", 1409 sp, sp->id, where, tag, key_sp_refcnt(sp)); 1410 } 1411 1412 /* 1413 * Must be called without holding key_spd.lock because the lock 1414 * would be held in localcount_release. 1415 */ 1416 void 1417 key_sp_unref(struct secpolicy *sp, const char* where, int tag) 1418 { 1419 1420 KDASSERT(mutex_ownable(&key_spd.lock)); 1421 1422 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1423 "DP SP:%p (ID=%u) from %s:%u; refcnt-- now %u\n", 1424 sp, sp->id, where, tag, key_sp_refcnt(sp)); 1425 1426 localcount_release(&sp->localcount, &key_spd.cv_lc, &key_spd.lock); 1427 } 1428 1429 static void 1430 key_init_sav(struct secasvar *sav) 1431 { 1432 1433 ASSERT_SLEEPABLE(); 1434 1435 localcount_init(&sav->localcount); 1436 SAVLIST_ENTRY_INIT(sav); 1437 SAVLUT_ENTRY_INIT(sav); 1438 } 1439 1440 u_int 1441 key_sa_refcnt(const struct secasvar *sav) 1442 { 1443 1444 /* FIXME */ 1445 return 0; 1446 } 1447 1448 void 1449 key_sa_ref(struct secasvar *sav, const char* where, int tag) 1450 { 1451 1452 localcount_acquire(&sav->localcount); 1453 1454 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1455 "DP cause refcnt++: SA:%p from %s:%u\n", 1456 sav, where, tag); 1457 } 1458 1459 void 1460 key_sa_unref(struct secasvar *sav, const char* where, int tag) 1461 { 1462 1463 KDASSERT(mutex_ownable(&key_sad.lock)); 1464 1465 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1466 "DP cause refcnt--: SA:%p from %s:%u\n", 1467 sav, where, tag); 1468 1469 localcount_release(&sav->localcount, &key_sad.cv_lc, &key_sad.lock); 1470 } 1471 1472 #if 0 1473 /* 1474 * Must be called after calling key_lookup_sp*(). 1475 * For the packet with socket. 1476 */ 1477 static void 1478 key_freeso(struct socket *so) 1479 { 1480 /* sanity check */ 1481 KASSERT(so != NULL); 1482 1483 switch (so->so_proto->pr_domain->dom_family) { 1484 #ifdef INET 1485 case PF_INET: 1486 { 1487 struct inpcb *pcb = sotoinpcb(so); 1488 1489 /* Does it have a PCB ? */ 1490 if (pcb == NULL) 1491 return; 1492 1493 struct inpcbpolicy *sp = pcb->inp_sp; 1494 key_freesp_so(&sp->sp_in); 1495 key_freesp_so(&sp->sp_out); 1496 } 1497 break; 1498 #endif 1499 #ifdef INET6 1500 case PF_INET6: 1501 { 1502 #ifdef HAVE_NRL_INPCB 1503 struct inpcb *pcb = sotoinpcb(so); 1504 struct inpcbpolicy *sp = pcb->inp_sp; 1505 1506 /* Does it have a PCB ? */ 1507 if (pcb == NULL) 1508 return; 1509 key_freesp_so(&sp->sp_in); 1510 key_freesp_so(&sp->sp_out); 1511 #else 1512 struct in6pcb *pcb = sotoin6pcb(so); 1513 1514 /* Does it have a PCB ? */ 1515 if (pcb == NULL) 1516 return; 1517 key_freesp_so(&pcb->in6p_sp->sp_in); 1518 key_freesp_so(&pcb->in6p_sp->sp_out); 1519 #endif 1520 } 1521 break; 1522 #endif /* INET6 */ 1523 default: 1524 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1525 so->so_proto->pr_domain->dom_family); 1526 return; 1527 } 1528 } 1529 1530 static void 1531 key_freesp_so(struct secpolicy **sp) 1532 { 1533 1534 KASSERT(sp != NULL); 1535 KASSERT(*sp != NULL); 1536 1537 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1538 (*sp)->policy == IPSEC_POLICY_BYPASS) 1539 return; 1540 1541 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1542 "invalid policy %u", (*sp)->policy); 1543 KEY_SP_UNREF(&sp); 1544 } 1545 #endif 1546 1547 static void 1548 key_sad_pserialize_perform(void) 1549 { 1550 1551 KASSERT(mutex_owned(&key_sad.lock)); 1552 1553 while (key_sad.psz_performing) 1554 cv_wait(&key_sad.cv_psz, &key_sad.lock); 1555 key_sad.psz_performing = true; 1556 mutex_exit(&key_sad.lock); 1557 1558 pserialize_perform(key_sad.psz); 1559 1560 mutex_enter(&key_sad.lock); 1561 key_sad.psz_performing = false; 1562 cv_broadcast(&key_sad.cv_psz); 1563 } 1564 1565 /* 1566 * Remove the sav from the savlist of its sah and wait for references to the sav 1567 * to be released. key_sad.lock must be held. 1568 */ 1569 static void 1570 key_unlink_sav(struct secasvar *sav) 1571 { 1572 1573 KASSERT(mutex_owned(&key_sad.lock)); 1574 1575 SAVLIST_WRITER_REMOVE(sav); 1576 SAVLUT_WRITER_REMOVE(sav); 1577 1578 KDASSERT(mutex_ownable(softnet_lock)); 1579 key_sad_pserialize_perform(); 1580 1581 localcount_drain(&sav->localcount, &key_sad.cv_lc, &key_sad.lock); 1582 } 1583 1584 /* 1585 * Destroy an sav where the sav must be unlinked from an sah 1586 * by say key_unlink_sav. 1587 */ 1588 static void 1589 key_destroy_sav(struct secasvar *sav) 1590 { 1591 1592 ASSERT_SLEEPABLE(); 1593 1594 localcount_fini(&sav->localcount); 1595 SAVLIST_ENTRY_DESTROY(sav); 1596 1597 key_delsav(sav); 1598 } 1599 1600 /* 1601 * Destroy sav with holding its reference. 1602 */ 1603 static void 1604 key_destroy_sav_with_ref(struct secasvar *sav) 1605 { 1606 1607 ASSERT_SLEEPABLE(); 1608 1609 mutex_enter(&key_sad.lock); 1610 sav->state = SADB_SASTATE_DEAD; 1611 SAVLIST_WRITER_REMOVE(sav); 1612 SAVLUT_WRITER_REMOVE(sav); 1613 mutex_exit(&key_sad.lock); 1614 1615 /* We cannot unref with holding key_sad.lock */ 1616 KEY_SA_UNREF(&sav); 1617 1618 mutex_enter(&key_sad.lock); 1619 KDASSERT(mutex_ownable(softnet_lock)); 1620 key_sad_pserialize_perform(); 1621 localcount_drain(&sav->localcount, &key_sad.cv_lc, &key_sad.lock); 1622 mutex_exit(&key_sad.lock); 1623 1624 key_destroy_sav(sav); 1625 } 1626 1627 /* %%% SPD management */ 1628 /* 1629 * free security policy entry. 1630 */ 1631 static void 1632 key_destroy_sp(struct secpolicy *sp) 1633 { 1634 1635 SPLIST_ENTRY_DESTROY(sp); 1636 localcount_fini(&sp->localcount); 1637 1638 key_free_sp(sp); 1639 1640 key_update_used(); 1641 } 1642 1643 void 1644 key_free_sp(struct secpolicy *sp) 1645 { 1646 struct ipsecrequest *isr = sp->req, *nextisr; 1647 1648 while (isr != NULL) { 1649 nextisr = isr->next; 1650 kmem_free(isr, sizeof(*isr)); 1651 isr = nextisr; 1652 } 1653 1654 kmem_free(sp, sizeof(*sp)); 1655 } 1656 1657 void 1658 key_socksplist_add(struct secpolicy *sp) 1659 { 1660 1661 mutex_enter(&key_spd.lock); 1662 PSLIST_WRITER_INSERT_HEAD(&key_spd.socksplist, sp, pslist_entry); 1663 mutex_exit(&key_spd.lock); 1664 1665 key_update_used(); 1666 } 1667 1668 /* 1669 * search SPD 1670 * OUT: NULL : not found 1671 * others : found, pointer to a SP. 1672 */ 1673 static struct secpolicy * 1674 key_getsp(const struct secpolicyindex *spidx) 1675 { 1676 struct secpolicy *sp; 1677 int s; 1678 1679 KASSERT(spidx != NULL); 1680 1681 s = pserialize_read_enter(); 1682 SPLIST_READER_FOREACH(sp, spidx->dir) { 1683 if (sp->state == IPSEC_SPSTATE_DEAD) 1684 continue; 1685 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1686 KEY_SP_REF(sp); 1687 pserialize_read_exit(s); 1688 return sp; 1689 } 1690 } 1691 pserialize_read_exit(s); 1692 1693 return NULL; 1694 } 1695 1696 /* 1697 * search SPD and remove found SP 1698 * OUT: NULL : not found 1699 * others : found, pointer to a SP. 1700 */ 1701 static struct secpolicy * 1702 key_lookup_and_remove_sp(const struct secpolicyindex *spidx, bool from_kernel) 1703 { 1704 struct secpolicy *sp = NULL; 1705 1706 mutex_enter(&key_spd.lock); 1707 SPLIST_WRITER_FOREACH(sp, spidx->dir) { 1708 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1709 /* 1710 * SPs created in kernel(e.g. ipsec(4) I/F) must not be 1711 * removed by userland programs. 1712 */ 1713 if (!from_kernel && sp->origin == IPSEC_SPORIGIN_KERNEL) 1714 continue; 1715 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1716 key_unlink_sp(sp); 1717 goto out; 1718 } 1719 } 1720 sp = NULL; 1721 out: 1722 mutex_exit(&key_spd.lock); 1723 1724 return sp; 1725 } 1726 1727 /* 1728 * get SP by index. 1729 * OUT: NULL : not found 1730 * others : found, pointer to a SP. 1731 */ 1732 static struct secpolicy * 1733 key_getspbyid(u_int32_t id) 1734 { 1735 struct secpolicy *sp; 1736 int s; 1737 1738 s = pserialize_read_enter(); 1739 SPLIST_READER_FOREACH(sp, IPSEC_DIR_INBOUND) { 1740 if (sp->state == IPSEC_SPSTATE_DEAD) 1741 continue; 1742 if (sp->id == id) { 1743 KEY_SP_REF(sp); 1744 goto out; 1745 } 1746 } 1747 1748 SPLIST_READER_FOREACH(sp, IPSEC_DIR_OUTBOUND) { 1749 if (sp->state == IPSEC_SPSTATE_DEAD) 1750 continue; 1751 if (sp->id == id) { 1752 KEY_SP_REF(sp); 1753 goto out; 1754 } 1755 } 1756 out: 1757 pserialize_read_exit(s); 1758 return sp; 1759 } 1760 1761 /* 1762 * get SP by index, remove and return it. 1763 * OUT: NULL : not found 1764 * others : found, pointer to a SP. 1765 */ 1766 static struct secpolicy * 1767 key_lookupbyid_and_remove_sp(u_int32_t id, bool from_kernel) 1768 { 1769 struct secpolicy *sp; 1770 1771 mutex_enter(&key_spd.lock); 1772 SPLIST_READER_FOREACH(sp, IPSEC_DIR_INBOUND) { 1773 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1774 /* 1775 * SPs created in kernel(e.g. ipsec(4) I/F) must not be 1776 * removed by userland programs. 1777 */ 1778 if (!from_kernel && sp->origin == IPSEC_SPORIGIN_KERNEL) 1779 continue; 1780 if (sp->id == id) 1781 goto out; 1782 } 1783 1784 SPLIST_READER_FOREACH(sp, IPSEC_DIR_OUTBOUND) { 1785 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1786 /* 1787 * SPs created in kernel(e.g. ipsec(4) I/F) must not be 1788 * removed by userland programs. 1789 */ 1790 if (!from_kernel && sp->origin == IPSEC_SPORIGIN_KERNEL) 1791 continue; 1792 if (sp->id == id) 1793 goto out; 1794 } 1795 out: 1796 if (sp != NULL) 1797 key_unlink_sp(sp); 1798 mutex_exit(&key_spd.lock); 1799 return sp; 1800 } 1801 1802 struct secpolicy * 1803 key_newsp(const char* where, int tag) 1804 { 1805 struct secpolicy *newsp = NULL; 1806 1807 newsp = kmem_zalloc(sizeof(struct secpolicy), KM_SLEEP); 1808 1809 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1810 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1811 return newsp; 1812 } 1813 1814 /* 1815 * create secpolicy structure from sadb_x_policy structure. 1816 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1817 * so must be set properly later. 1818 */ 1819 static struct secpolicy * 1820 _key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error, 1821 bool from_kernel) 1822 { 1823 struct secpolicy *newsp; 1824 1825 KASSERT(!cpu_softintr_p()); 1826 KASSERT(xpl0 != NULL); 1827 KASSERT(len >= sizeof(*xpl0)); 1828 1829 if (len != PFKEY_EXTLEN(xpl0)) { 1830 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1831 *error = EINVAL; 1832 return NULL; 1833 } 1834 1835 newsp = KEY_NEWSP(); 1836 if (newsp == NULL) { 1837 *error = ENOBUFS; 1838 return NULL; 1839 } 1840 1841 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1842 newsp->policy = xpl0->sadb_x_policy_type; 1843 1844 /* check policy */ 1845 switch (xpl0->sadb_x_policy_type) { 1846 case IPSEC_POLICY_DISCARD: 1847 case IPSEC_POLICY_NONE: 1848 case IPSEC_POLICY_ENTRUST: 1849 case IPSEC_POLICY_BYPASS: 1850 newsp->req = NULL; 1851 *error = 0; 1852 return newsp; 1853 1854 case IPSEC_POLICY_IPSEC: 1855 /* Continued */ 1856 break; 1857 default: 1858 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1859 key_free_sp(newsp); 1860 *error = EINVAL; 1861 return NULL; 1862 } 1863 1864 /* IPSEC_POLICY_IPSEC */ 1865 { 1866 int tlen; 1867 const struct sadb_x_ipsecrequest *xisr; 1868 uint16_t xisr_reqid; 1869 struct ipsecrequest **p_isr = &newsp->req; 1870 1871 /* validity check */ 1872 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1873 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1874 *error = EINVAL; 1875 goto free_exit; 1876 } 1877 1878 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1879 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1880 1881 while (tlen > 0) { 1882 /* length check */ 1883 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1884 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1885 *error = EINVAL; 1886 goto free_exit; 1887 } 1888 1889 /* allocate request buffer */ 1890 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1891 1892 /* set values */ 1893 (*p_isr)->next = NULL; 1894 1895 switch (xisr->sadb_x_ipsecrequest_proto) { 1896 case IPPROTO_ESP: 1897 case IPPROTO_AH: 1898 case IPPROTO_IPCOMP: 1899 break; 1900 default: 1901 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1902 xisr->sadb_x_ipsecrequest_proto); 1903 *error = EPROTONOSUPPORT; 1904 goto free_exit; 1905 } 1906 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1907 1908 switch (xisr->sadb_x_ipsecrequest_mode) { 1909 case IPSEC_MODE_TRANSPORT: 1910 case IPSEC_MODE_TUNNEL: 1911 break; 1912 case IPSEC_MODE_ANY: 1913 default: 1914 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1915 xisr->sadb_x_ipsecrequest_mode); 1916 *error = EINVAL; 1917 goto free_exit; 1918 } 1919 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1920 1921 switch (xisr->sadb_x_ipsecrequest_level) { 1922 case IPSEC_LEVEL_DEFAULT: 1923 case IPSEC_LEVEL_USE: 1924 case IPSEC_LEVEL_REQUIRE: 1925 break; 1926 case IPSEC_LEVEL_UNIQUE: 1927 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1928 /* validity check */ 1929 /* 1930 * case 1) from_kernel == false 1931 * That means the request comes from userland. 1932 * If range violation of reqid, kernel will 1933 * update it, don't refuse it. 1934 * 1935 * case 2) from_kernel == true 1936 * That means the request comes from kernel 1937 * (e.g. ipsec(4) I/F). 1938 * Use thre requested reqid to avoid inconsistency 1939 * between kernel's reqid and the reqid in pf_key 1940 * message sent to userland. The pf_key message is 1941 * built by diverting request mbuf. 1942 */ 1943 if (!from_kernel && 1944 xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1945 IPSECLOG(LOG_DEBUG, 1946 "reqid=%d range " 1947 "violation, updated by kernel.\n", 1948 xisr_reqid); 1949 xisr_reqid = 0; 1950 } 1951 1952 /* allocate new reqid id if reqid is zero. */ 1953 if (xisr_reqid == 0) { 1954 u_int16_t reqid = key_newreqid(); 1955 if (reqid == 0) { 1956 *error = ENOBUFS; 1957 goto free_exit; 1958 } 1959 (*p_isr)->saidx.reqid = reqid; 1960 } else { 1961 /* set it for manual keying. */ 1962 (*p_isr)->saidx.reqid = xisr_reqid; 1963 } 1964 break; 1965 1966 default: 1967 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1968 xisr->sadb_x_ipsecrequest_level); 1969 *error = EINVAL; 1970 goto free_exit; 1971 } 1972 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1973 1974 /* set IP addresses if there */ 1975 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1976 const struct sockaddr *paddr; 1977 1978 paddr = (const struct sockaddr *)(xisr + 1); 1979 1980 /* validity check */ 1981 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1982 IPSECLOG(LOG_DEBUG, "invalid request " 1983 "address length.\n"); 1984 *error = EINVAL; 1985 goto free_exit; 1986 } 1987 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1988 1989 paddr = (const struct sockaddr *)((const char *)paddr 1990 + paddr->sa_len); 1991 1992 /* validity check */ 1993 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1994 IPSECLOG(LOG_DEBUG, "invalid request " 1995 "address length.\n"); 1996 *error = EINVAL; 1997 goto free_exit; 1998 } 1999 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 2000 } 2001 2002 (*p_isr)->sp = newsp; 2003 2004 /* initialization for the next. */ 2005 p_isr = &(*p_isr)->next; 2006 tlen -= xisr->sadb_x_ipsecrequest_len; 2007 2008 /* validity check */ 2009 if (tlen < 0) { 2010 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 2011 *error = EINVAL; 2012 goto free_exit; 2013 } 2014 2015 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 2016 xisr->sadb_x_ipsecrequest_len); 2017 } 2018 } 2019 2020 *error = 0; 2021 return newsp; 2022 2023 free_exit: 2024 key_free_sp(newsp); 2025 return NULL; 2026 } 2027 2028 struct secpolicy * 2029 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 2030 { 2031 2032 return _key_msg2sp(xpl0, len, error, false); 2033 } 2034 2035 u_int16_t 2036 key_newreqid(void) 2037 { 2038 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 2039 2040 auto_reqid = (auto_reqid == 0xffff ? 2041 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 2042 2043 /* XXX should be unique check */ 2044 2045 return auto_reqid; 2046 } 2047 2048 /* 2049 * copy secpolicy struct to sadb_x_policy structure indicated. 2050 */ 2051 struct mbuf * 2052 key_sp2msg(const struct secpolicy *sp, int mflag) 2053 { 2054 struct sadb_x_policy *xpl; 2055 int tlen; 2056 char *p; 2057 struct mbuf *m; 2058 2059 KASSERT(sp != NULL); 2060 2061 tlen = key_getspreqmsglen(sp); 2062 2063 m = key_alloc_mbuf(tlen, mflag); 2064 if (!m || m->m_next) { /*XXX*/ 2065 if (m) 2066 m_freem(m); 2067 return NULL; 2068 } 2069 2070 m->m_len = tlen; 2071 m->m_next = NULL; 2072 xpl = mtod(m, struct sadb_x_policy *); 2073 memset(xpl, 0, tlen); 2074 2075 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 2076 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 2077 xpl->sadb_x_policy_type = sp->policy; 2078 xpl->sadb_x_policy_dir = sp->spidx.dir; 2079 xpl->sadb_x_policy_id = sp->id; 2080 p = (char *)xpl + sizeof(*xpl); 2081 2082 /* if is the policy for ipsec ? */ 2083 if (sp->policy == IPSEC_POLICY_IPSEC) { 2084 struct sadb_x_ipsecrequest *xisr; 2085 struct ipsecrequest *isr; 2086 2087 for (isr = sp->req; isr != NULL; isr = isr->next) { 2088 2089 xisr = (struct sadb_x_ipsecrequest *)p; 2090 2091 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 2092 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 2093 xisr->sadb_x_ipsecrequest_level = isr->level; 2094 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 2095 2096 p += sizeof(*xisr); 2097 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 2098 p += isr->saidx.src.sa.sa_len; 2099 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 2100 p += isr->saidx.src.sa.sa_len; 2101 2102 xisr->sadb_x_ipsecrequest_len = 2103 PFKEY_ALIGN8(sizeof(*xisr) 2104 + isr->saidx.src.sa.sa_len 2105 + isr->saidx.dst.sa.sa_len); 2106 } 2107 } 2108 2109 return m; 2110 } 2111 2112 /* 2113 * m will not be freed nor modified. It never return NULL. 2114 * If it returns a mbuf of M_PKTHDR, the mbuf ensures to have 2115 * contiguous length at least sizeof(struct sadb_msg). 2116 */ 2117 static struct mbuf * 2118 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 2119 int ndeep, int nitem, ...) 2120 { 2121 va_list ap; 2122 int idx; 2123 int i; 2124 struct mbuf *result = NULL, *n; 2125 int len; 2126 2127 KASSERT(m != NULL); 2128 KASSERT(mhp != NULL); 2129 KASSERT(!cpu_softintr_p()); 2130 2131 va_start(ap, nitem); 2132 for (i = 0; i < nitem; i++) { 2133 idx = va_arg(ap, int); 2134 KASSERT(idx >= 0); 2135 KASSERT(idx <= SADB_EXT_MAX); 2136 /* don't attempt to pull empty extension */ 2137 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 2138 continue; 2139 if (idx != SADB_EXT_RESERVED && 2140 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 2141 continue; 2142 2143 if (idx == SADB_EXT_RESERVED) { 2144 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 2145 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2146 MGETHDR(n, M_WAITOK, MT_DATA); 2147 n->m_len = len; 2148 n->m_next = NULL; 2149 m_copydata(m, 0, sizeof(struct sadb_msg), 2150 mtod(n, void *)); 2151 } else if (i < ndeep) { 2152 len = mhp->extlen[idx]; 2153 n = key_alloc_mbuf(len, M_WAITOK); 2154 KASSERT(n->m_next == NULL); 2155 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 2156 mtod(n, void *)); 2157 } else { 2158 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 2159 M_WAITOK); 2160 } 2161 KASSERT(n != NULL); 2162 2163 if (result) 2164 m_cat(result, n); 2165 else 2166 result = n; 2167 } 2168 va_end(ap); 2169 2170 KASSERT(result != NULL); 2171 if ((result->m_flags & M_PKTHDR) != 0) { 2172 result->m_pkthdr.len = 0; 2173 for (n = result; n; n = n->m_next) 2174 result->m_pkthdr.len += n->m_len; 2175 KASSERT(result->m_len >= sizeof(struct sadb_msg)); 2176 } 2177 2178 return result; 2179 } 2180 2181 /* 2182 * The argument _sp must not overwrite until SP is created and registered 2183 * successfully. 2184 */ 2185 static int 2186 key_spdadd(struct socket *so, struct mbuf *m, 2187 const struct sadb_msghdr *mhp, struct secpolicy **_sp, 2188 bool from_kernel) 2189 { 2190 const struct sockaddr *src, *dst; 2191 const struct sadb_x_policy *xpl0; 2192 struct sadb_x_policy *xpl; 2193 const struct sadb_lifetime *lft = NULL; 2194 struct secpolicyindex spidx; 2195 struct secpolicy *newsp; 2196 int error; 2197 uint32_t sadb_x_policy_id; 2198 2199 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2200 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2201 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2202 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2203 return key_senderror(so, m, EINVAL); 2204 } 2205 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2206 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2207 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2208 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2209 return key_senderror(so, m, EINVAL); 2210 } 2211 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 2212 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 2213 sizeof(struct sadb_lifetime)) { 2214 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2215 return key_senderror(so, m, EINVAL); 2216 } 2217 lft = mhp->ext[SADB_EXT_LIFETIME_HARD]; 2218 } 2219 2220 xpl0 = mhp->ext[SADB_X_EXT_POLICY]; 2221 2222 /* checking the direciton. */ 2223 switch (xpl0->sadb_x_policy_dir) { 2224 case IPSEC_DIR_INBOUND: 2225 case IPSEC_DIR_OUTBOUND: 2226 break; 2227 default: 2228 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2229 return key_senderror(so, m, EINVAL); 2230 } 2231 2232 /* check policy */ 2233 /* key_api_spdadd() accepts DISCARD, NONE and IPSEC. */ 2234 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 2235 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 2236 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 2237 return key_senderror(so, m, EINVAL); 2238 } 2239 2240 /* policy requests are mandatory when action is ipsec. */ 2241 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 2242 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 2243 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 2244 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 2245 return key_senderror(so, m, EINVAL); 2246 } 2247 2248 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 2249 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 2250 2251 /* sanity check on addr pair */ 2252 if (src->sa_family != dst->sa_family) 2253 return key_senderror(so, m, EINVAL); 2254 if (src->sa_len != dst->sa_len) 2255 return key_senderror(so, m, EINVAL); 2256 2257 key_init_spidx_bymsghdr(&spidx, mhp); 2258 2259 /* 2260 * checking there is SP already or not. 2261 * SPDUPDATE doesn't depend on whether there is a SP or not. 2262 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 2263 * then error. 2264 */ 2265 { 2266 struct secpolicy *sp; 2267 2268 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 2269 sp = key_lookup_and_remove_sp(&spidx, from_kernel); 2270 if (sp != NULL) 2271 key_destroy_sp(sp); 2272 } else { 2273 sp = key_getsp(&spidx); 2274 if (sp != NULL) { 2275 KEY_SP_UNREF(&sp); 2276 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 2277 return key_senderror(so, m, EEXIST); 2278 } 2279 } 2280 } 2281 2282 /* allocation new SP entry */ 2283 newsp = _key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error, from_kernel); 2284 if (newsp == NULL) { 2285 return key_senderror(so, m, error); 2286 } 2287 2288 newsp->id = key_getnewspid(); 2289 if (newsp->id == 0) { 2290 kmem_free(newsp, sizeof(*newsp)); 2291 return key_senderror(so, m, ENOBUFS); 2292 } 2293 2294 newsp->spidx = spidx; 2295 newsp->created = time_uptime; 2296 newsp->lastused = newsp->created; 2297 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 2298 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 2299 if (from_kernel) 2300 newsp->origin = IPSEC_SPORIGIN_KERNEL; 2301 else 2302 newsp->origin = IPSEC_SPORIGIN_USER; 2303 2304 key_init_sp(newsp); 2305 if (from_kernel) 2306 KEY_SP_REF(newsp); 2307 2308 sadb_x_policy_id = newsp->id; 2309 2310 if (_sp != NULL) 2311 *_sp = newsp; 2312 2313 mutex_enter(&key_spd.lock); 2314 SPLIST_WRITER_INSERT_TAIL(newsp->spidx.dir, newsp); 2315 mutex_exit(&key_spd.lock); 2316 /* 2317 * We don't have a reference to newsp, so we must not touch newsp from 2318 * now on. If you want to do, you must take a reference beforehand. 2319 */ 2320 newsp = NULL; 2321 2322 #ifdef notyet 2323 /* delete the entry in key_misc.spacqlist */ 2324 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 2325 struct secspacq *spacq = key_getspacq(&spidx); 2326 if (spacq != NULL) { 2327 /* reset counter in order to deletion by timehandler. */ 2328 spacq->created = time_uptime; 2329 spacq->count = 0; 2330 } 2331 } 2332 #endif 2333 2334 /* Invalidate all cached SPD pointers in the PCBs. */ 2335 ipsec_invalpcbcacheall(); 2336 2337 #if defined(GATEWAY) 2338 /* Invalidate the ipflow cache, as well. */ 2339 ipflow_invalidate_all(0); 2340 #ifdef INET6 2341 if (in6_present) 2342 ip6flow_invalidate_all(0); 2343 #endif /* INET6 */ 2344 #endif /* GATEWAY */ 2345 2346 key_update_used(); 2347 2348 { 2349 struct mbuf *n, *mpolicy; 2350 int off; 2351 2352 /* create new sadb_msg to reply. */ 2353 if (lft) { 2354 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2355 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2356 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2357 } else { 2358 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2359 SADB_X_EXT_POLICY, 2360 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2361 } 2362 2363 key_fill_replymsg(n, 0); 2364 off = 0; 2365 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2366 sizeof(*xpl), &off); 2367 if (mpolicy == NULL) { 2368 /* n is already freed */ 2369 /* 2370 * valid sp has been created, so we does not overwrite _sp 2371 * NULL here. let caller decide to use the sp or not. 2372 */ 2373 return key_senderror(so, m, ENOBUFS); 2374 } 2375 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2376 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2377 m_freem(n); 2378 /* ditto */ 2379 return key_senderror(so, m, EINVAL); 2380 } 2381 2382 xpl->sadb_x_policy_id = sadb_x_policy_id; 2383 2384 m_freem(m); 2385 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2386 } 2387 } 2388 2389 /* 2390 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 2391 * add an entry to SP database, when received 2392 * <base, address(SD), (lifetime(H),) policy> 2393 * from the user(?). 2394 * Adding to SP database, 2395 * and send 2396 * <base, address(SD), (lifetime(H),) policy> 2397 * to the socket which was send. 2398 * 2399 * SPDADD set a unique policy entry. 2400 * SPDSETIDX like SPDADD without a part of policy requests. 2401 * SPDUPDATE replace a unique policy entry. 2402 * 2403 * m will always be freed. 2404 */ 2405 static int 2406 key_api_spdadd(struct socket *so, struct mbuf *m, 2407 const struct sadb_msghdr *mhp) 2408 { 2409 2410 return key_spdadd(so, m, mhp, NULL, false); 2411 } 2412 2413 struct secpolicy * 2414 key_kpi_spdadd(struct mbuf *m) 2415 { 2416 struct sadb_msghdr mh; 2417 int error; 2418 struct secpolicy *sp = NULL; 2419 2420 error = key_align(m, &mh); 2421 if (error) 2422 return NULL; 2423 2424 error = key_spdadd(NULL, m, &mh, &sp, true); 2425 if (error) { 2426 /* 2427 * Currently, when key_spdadd() cannot send a PFKEY message 2428 * which means SP has been created, key_spdadd() returns error 2429 * although SP is created successfully. 2430 * Kernel components would not care PFKEY messages, so return 2431 * the "sp" regardless of error code. key_spdadd() overwrites 2432 * the argument only if SP is created successfully. 2433 */ 2434 } 2435 return sp; 2436 } 2437 2438 /* 2439 * get new policy id. 2440 * OUT: 2441 * 0: failure. 2442 * others: success. 2443 */ 2444 static u_int32_t 2445 key_getnewspid(void) 2446 { 2447 u_int32_t newid = 0; 2448 int count = key_spi_trycnt; /* XXX */ 2449 struct secpolicy *sp; 2450 2451 /* when requesting to allocate spi ranged */ 2452 while (count--) { 2453 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2454 2455 sp = key_getspbyid(newid); 2456 if (sp == NULL) 2457 break; 2458 2459 KEY_SP_UNREF(&sp); 2460 } 2461 2462 if (count == 0 || newid == 0) { 2463 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2464 return 0; 2465 } 2466 2467 return newid; 2468 } 2469 2470 /* 2471 * SADB_SPDDELETE processing 2472 * receive 2473 * <base, address(SD), policy(*)> 2474 * from the user(?), and set SADB_SASTATE_DEAD, 2475 * and send, 2476 * <base, address(SD), policy(*)> 2477 * to the ikmpd. 2478 * policy(*) including direction of policy. 2479 * 2480 * m will always be freed. 2481 */ 2482 static int 2483 key_api_spddelete(struct socket *so, struct mbuf *m, 2484 const struct sadb_msghdr *mhp) 2485 { 2486 struct sadb_x_policy *xpl0; 2487 struct secpolicyindex spidx; 2488 struct secpolicy *sp; 2489 2490 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2491 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2492 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2493 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2494 return key_senderror(so, m, EINVAL); 2495 } 2496 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2497 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2498 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2499 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2500 return key_senderror(so, m, EINVAL); 2501 } 2502 2503 xpl0 = mhp->ext[SADB_X_EXT_POLICY]; 2504 2505 /* checking the directon. */ 2506 switch (xpl0->sadb_x_policy_dir) { 2507 case IPSEC_DIR_INBOUND: 2508 case IPSEC_DIR_OUTBOUND: 2509 break; 2510 default: 2511 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2512 return key_senderror(so, m, EINVAL); 2513 } 2514 2515 /* make secindex */ 2516 key_init_spidx_bymsghdr(&spidx, mhp); 2517 2518 /* Is there SP in SPD ? */ 2519 sp = key_lookup_and_remove_sp(&spidx, false); 2520 if (sp == NULL) { 2521 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2522 return key_senderror(so, m, EINVAL); 2523 } 2524 2525 /* save policy id to buffer to be returned. */ 2526 xpl0->sadb_x_policy_id = sp->id; 2527 2528 key_destroy_sp(sp); 2529 2530 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2531 2532 { 2533 struct mbuf *n; 2534 2535 /* create new sadb_msg to reply. */ 2536 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2537 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2538 key_fill_replymsg(n, 0); 2539 m_freem(m); 2540 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2541 } 2542 } 2543 2544 static struct mbuf * 2545 key_alloc_mbuf_simple(int len, int mflag) 2546 { 2547 struct mbuf *n; 2548 2549 KASSERT(mflag == M_NOWAIT || (mflag == M_WAITOK && !cpu_softintr_p())); 2550 2551 MGETHDR(n, mflag, MT_DATA); 2552 if (n && len > MHLEN) { 2553 MCLGET(n, mflag); 2554 if ((n->m_flags & M_EXT) == 0) { 2555 m_freem(n); 2556 n = NULL; 2557 } 2558 } 2559 return n; 2560 } 2561 2562 /* 2563 * SADB_SPDDELETE2 processing 2564 * receive 2565 * <base, policy(*)> 2566 * from the user(?), and set SADB_SASTATE_DEAD, 2567 * and send, 2568 * <base, policy(*)> 2569 * to the ikmpd. 2570 * policy(*) including direction of policy. 2571 * 2572 * m will always be freed. 2573 */ 2574 static int 2575 key_spddelete2(struct socket *so, struct mbuf *m, 2576 const struct sadb_msghdr *mhp, bool from_kernel) 2577 { 2578 u_int32_t id; 2579 struct secpolicy *sp; 2580 const struct sadb_x_policy *xpl; 2581 2582 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2583 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2584 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2585 return key_senderror(so, m, EINVAL); 2586 } 2587 2588 xpl = mhp->ext[SADB_X_EXT_POLICY]; 2589 id = xpl->sadb_x_policy_id; 2590 2591 /* Is there SP in SPD ? */ 2592 sp = key_lookupbyid_and_remove_sp(id, from_kernel); 2593 if (sp == NULL) { 2594 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2595 return key_senderror(so, m, EINVAL); 2596 } 2597 2598 key_destroy_sp(sp); 2599 2600 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2601 2602 { 2603 struct mbuf *n, *nn; 2604 int off, len; 2605 2606 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 2607 2608 /* create new sadb_msg to reply. */ 2609 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2610 2611 n = key_alloc_mbuf_simple(len, M_WAITOK); 2612 n->m_len = len; 2613 n->m_next = NULL; 2614 off = 0; 2615 2616 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2617 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2618 2619 KASSERTMSG(off == len, "length inconsistency"); 2620 2621 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2622 mhp->extlen[SADB_X_EXT_POLICY], M_WAITOK); 2623 2624 n->m_pkthdr.len = 0; 2625 for (nn = n; nn; nn = nn->m_next) 2626 n->m_pkthdr.len += nn->m_len; 2627 2628 key_fill_replymsg(n, 0); 2629 m_freem(m); 2630 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2631 } 2632 } 2633 2634 /* 2635 * SADB_SPDDELETE2 processing 2636 * receive 2637 * <base, policy(*)> 2638 * from the user(?), and set SADB_SASTATE_DEAD, 2639 * and send, 2640 * <base, policy(*)> 2641 * to the ikmpd. 2642 * policy(*) including direction of policy. 2643 * 2644 * m will always be freed. 2645 */ 2646 static int 2647 key_api_spddelete2(struct socket *so, struct mbuf *m, 2648 const struct sadb_msghdr *mhp) 2649 { 2650 2651 return key_spddelete2(so, m, mhp, false); 2652 } 2653 2654 int 2655 key_kpi_spddelete2(struct mbuf *m) 2656 { 2657 struct sadb_msghdr mh; 2658 int error; 2659 2660 error = key_align(m, &mh); 2661 if (error) 2662 return EINVAL; 2663 2664 return key_spddelete2(NULL, m, &mh, true); 2665 } 2666 2667 /* 2668 * SADB_X_GET processing 2669 * receive 2670 * <base, policy(*)> 2671 * from the user(?), 2672 * and send, 2673 * <base, address(SD), policy> 2674 * to the ikmpd. 2675 * policy(*) including direction of policy. 2676 * 2677 * m will always be freed. 2678 */ 2679 static int 2680 key_api_spdget(struct socket *so, struct mbuf *m, 2681 const struct sadb_msghdr *mhp) 2682 { 2683 u_int32_t id; 2684 struct secpolicy *sp; 2685 struct mbuf *n; 2686 const struct sadb_x_policy *xpl; 2687 2688 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2689 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2690 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2691 return key_senderror(so, m, EINVAL); 2692 } 2693 2694 xpl = mhp->ext[SADB_X_EXT_POLICY]; 2695 id = xpl->sadb_x_policy_id; 2696 2697 /* Is there SP in SPD ? */ 2698 sp = key_getspbyid(id); 2699 if (sp == NULL) { 2700 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2701 return key_senderror(so, m, ENOENT); 2702 } 2703 2704 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2705 mhp->msg->sadb_msg_pid); 2706 KEY_SP_UNREF(&sp); /* ref gained by key_getspbyid */ 2707 m_freem(m); 2708 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2709 } 2710 2711 #ifdef notyet 2712 /* 2713 * SADB_X_SPDACQUIRE processing. 2714 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2715 * send 2716 * <base, policy(*)> 2717 * to KMD, and expect to receive 2718 * <base> with SADB_X_SPDACQUIRE if error occurred, 2719 * or 2720 * <base, policy> 2721 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2722 * policy(*) is without policy requests. 2723 * 2724 * 0 : succeed 2725 * others: error number 2726 */ 2727 int 2728 key_spdacquire(const struct secpolicy *sp) 2729 { 2730 struct mbuf *result = NULL, *m; 2731 struct secspacq *newspacq; 2732 int error; 2733 2734 KASSERT(sp != NULL); 2735 KASSERTMSG(sp->req == NULL, "called but there is request"); 2736 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2737 "policy mismathed. IPsec is expected"); 2738 2739 /* Get an entry to check whether sent message or not. */ 2740 newspacq = key_getspacq(&sp->spidx); 2741 if (newspacq != NULL) { 2742 if (key_blockacq_count < newspacq->count) { 2743 /* reset counter and do send message. */ 2744 newspacq->count = 0; 2745 } else { 2746 /* increment counter and do nothing. */ 2747 newspacq->count++; 2748 return 0; 2749 } 2750 } else { 2751 /* make new entry for blocking to send SADB_ACQUIRE. */ 2752 newspacq = key_newspacq(&sp->spidx); 2753 if (newspacq == NULL) 2754 return ENOBUFS; 2755 2756 /* add to key_misc.acqlist */ 2757 LIST_INSERT_HEAD(&key_misc.spacqlist, newspacq, chain); 2758 } 2759 2760 /* create new sadb_msg to reply. */ 2761 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2762 if (!m) { 2763 error = ENOBUFS; 2764 goto fail; 2765 } 2766 result = m; 2767 2768 result->m_pkthdr.len = 0; 2769 for (m = result; m; m = m->m_next) 2770 result->m_pkthdr.len += m->m_len; 2771 2772 mtod(result, struct sadb_msg *)->sadb_msg_len = 2773 PFKEY_UNIT64(result->m_pkthdr.len); 2774 2775 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2776 2777 fail: 2778 if (result) 2779 m_freem(result); 2780 return error; 2781 } 2782 #endif /* notyet */ 2783 2784 /* 2785 * SADB_SPDFLUSH processing 2786 * receive 2787 * <base> 2788 * from the user, and free all entries in secpctree. 2789 * and send, 2790 * <base> 2791 * to the user. 2792 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2793 * 2794 * m will always be freed. 2795 */ 2796 static int 2797 key_api_spdflush(struct socket *so, struct mbuf *m, 2798 const struct sadb_msghdr *mhp) 2799 { 2800 struct sadb_msg *newmsg; 2801 struct secpolicy *sp; 2802 u_int dir; 2803 2804 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2805 return key_senderror(so, m, EINVAL); 2806 2807 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2808 retry: 2809 mutex_enter(&key_spd.lock); 2810 SPLIST_WRITER_FOREACH(sp, dir) { 2811 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 2812 /* 2813 * Userlang programs can remove SPs created by userland 2814 * probrams only, that is, they cannot remove SPs 2815 * created in kernel(e.g. ipsec(4) I/F). 2816 */ 2817 if (sp->origin == IPSEC_SPORIGIN_USER) { 2818 key_unlink_sp(sp); 2819 mutex_exit(&key_spd.lock); 2820 key_destroy_sp(sp); 2821 goto retry; 2822 } 2823 } 2824 mutex_exit(&key_spd.lock); 2825 } 2826 2827 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2828 2829 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2830 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2831 return key_senderror(so, m, ENOBUFS); 2832 } 2833 2834 if (m->m_next) 2835 m_freem(m->m_next); 2836 m->m_next = NULL; 2837 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2838 newmsg = mtod(m, struct sadb_msg *); 2839 newmsg->sadb_msg_errno = 0; 2840 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2841 2842 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2843 } 2844 2845 static struct sockaddr key_src = { 2846 .sa_len = 2, 2847 .sa_family = PF_KEY, 2848 }; 2849 2850 static struct mbuf * 2851 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2852 { 2853 struct secpolicy *sp; 2854 int cnt; 2855 u_int dir; 2856 struct mbuf *m, *n, *prev; 2857 int totlen; 2858 2859 KASSERT(mutex_owned(&key_spd.lock)); 2860 2861 *lenp = 0; 2862 2863 /* search SPD entry and get buffer size. */ 2864 cnt = 0; 2865 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2866 SPLIST_WRITER_FOREACH(sp, dir) { 2867 cnt++; 2868 } 2869 } 2870 2871 if (cnt == 0) { 2872 *errorp = ENOENT; 2873 return (NULL); 2874 } 2875 2876 m = NULL; 2877 prev = m; 2878 totlen = 0; 2879 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2880 SPLIST_WRITER_FOREACH(sp, dir) { 2881 --cnt; 2882 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2883 2884 totlen += n->m_pkthdr.len; 2885 if (!m) { 2886 m = n; 2887 } else { 2888 prev->m_nextpkt = n; 2889 } 2890 prev = n; 2891 } 2892 } 2893 2894 *lenp = totlen; 2895 *errorp = 0; 2896 return (m); 2897 } 2898 2899 /* 2900 * SADB_SPDDUMP processing 2901 * receive 2902 * <base> 2903 * from the user, and dump all SP leaves 2904 * and send, 2905 * <base> ..... 2906 * to the ikmpd. 2907 * 2908 * m will always be freed. 2909 */ 2910 static int 2911 key_api_spddump(struct socket *so, struct mbuf *m0, 2912 const struct sadb_msghdr *mhp) 2913 { 2914 struct mbuf *n; 2915 int error, len; 2916 int ok; 2917 pid_t pid; 2918 2919 pid = mhp->msg->sadb_msg_pid; 2920 /* 2921 * If the requestor has insufficient socket-buffer space 2922 * for the entire chain, nobody gets any response to the DUMP. 2923 * XXX For now, only the requestor ever gets anything. 2924 * Moreover, if the requestor has any space at all, they receive 2925 * the entire chain, otherwise the request is refused with ENOBUFS. 2926 */ 2927 if (sbspace(&so->so_rcv) <= 0) { 2928 return key_senderror(so, m0, ENOBUFS); 2929 } 2930 2931 mutex_enter(&key_spd.lock); 2932 n = key_setspddump_chain(&error, &len, pid); 2933 mutex_exit(&key_spd.lock); 2934 2935 if (n == NULL) { 2936 return key_senderror(so, m0, ENOENT); 2937 } 2938 { 2939 uint64_t *ps = PFKEY_STAT_GETREF(); 2940 ps[PFKEY_STAT_IN_TOTAL]++; 2941 ps[PFKEY_STAT_IN_BYTES] += len; 2942 PFKEY_STAT_PUTREF(); 2943 } 2944 2945 /* 2946 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2947 * The requestor receives either the entire chain, or an 2948 * error message with ENOBUFS. 2949 */ 2950 2951 /* 2952 * sbappendchainwith record takes the chain of entries, one 2953 * packet-record per SPD entry, prepends the key_src sockaddr 2954 * to each packet-record, links the sockaddr mbufs into a new 2955 * list of records, then appends the entire resulting 2956 * list to the requesting socket. 2957 */ 2958 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2959 SB_PRIO_ONESHOT_OVERFLOW); 2960 2961 if (!ok) { 2962 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2963 m_freem(n); 2964 return key_senderror(so, m0, ENOBUFS); 2965 } 2966 2967 m_freem(m0); 2968 return error; 2969 } 2970 2971 /* 2972 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2973 */ 2974 static int 2975 key_api_nat_map(struct socket *so, struct mbuf *m, 2976 const struct sadb_msghdr *mhp) 2977 { 2978 struct sadb_x_nat_t_type *type; 2979 struct sadb_x_nat_t_port *sport; 2980 struct sadb_x_nat_t_port *dport; 2981 struct sadb_address *iaddr, *raddr; 2982 struct sadb_x_nat_t_frag *frag; 2983 2984 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2985 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2986 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2987 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2988 return key_senderror(so, m, EINVAL); 2989 } 2990 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2991 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2992 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2993 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2994 return key_senderror(so, m, EINVAL); 2995 } 2996 2997 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2998 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2999 IPSECLOG(LOG_DEBUG, "invalid message\n"); 3000 return key_senderror(so, m, EINVAL); 3001 } 3002 3003 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 3004 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 3005 IPSECLOG(LOG_DEBUG, "invalid message\n"); 3006 return key_senderror(so, m, EINVAL); 3007 } 3008 3009 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 3010 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 3011 IPSECLOG(LOG_DEBUG, "invalid message\n"); 3012 return key_senderror(so, m, EINVAL); 3013 } 3014 3015 type = mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 3016 sport = mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 3017 dport = mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 3018 iaddr = mhp->ext[SADB_X_EXT_NAT_T_OAI]; 3019 raddr = mhp->ext[SADB_X_EXT_NAT_T_OAR]; 3020 frag = mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 3021 3022 /* 3023 * XXX handle that, it should also contain a SA, or anything 3024 * that enable to update the SA information. 3025 */ 3026 3027 return 0; 3028 } 3029 3030 /* 3031 * Never return NULL. 3032 */ 3033 static struct mbuf * 3034 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 3035 { 3036 struct mbuf *result = NULL, *m; 3037 3038 KASSERT(!cpu_softintr_p()); 3039 3040 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, 3041 key_sp_refcnt(sp), M_WAITOK); 3042 result = m; 3043 3044 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3045 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto, M_WAITOK); 3046 m_cat(result, m); 3047 3048 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3049 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto, M_WAITOK); 3050 m_cat(result, m); 3051 3052 m = key_sp2msg(sp, M_WAITOK); 3053 m_cat(result, m); 3054 3055 KASSERT(result->m_flags & M_PKTHDR); 3056 KASSERT(result->m_len >= sizeof(struct sadb_msg)); 3057 3058 result->m_pkthdr.len = 0; 3059 for (m = result; m; m = m->m_next) 3060 result->m_pkthdr.len += m->m_len; 3061 3062 mtod(result, struct sadb_msg *)->sadb_msg_len = 3063 PFKEY_UNIT64(result->m_pkthdr.len); 3064 3065 return result; 3066 } 3067 3068 /* 3069 * get PFKEY message length for security policy and request. 3070 */ 3071 static u_int 3072 key_getspreqmsglen(const struct secpolicy *sp) 3073 { 3074 u_int tlen; 3075 3076 tlen = sizeof(struct sadb_x_policy); 3077 3078 /* if is the policy for ipsec ? */ 3079 if (sp->policy != IPSEC_POLICY_IPSEC) 3080 return tlen; 3081 3082 /* get length of ipsec requests */ 3083 { 3084 const struct ipsecrequest *isr; 3085 int len; 3086 3087 for (isr = sp->req; isr != NULL; isr = isr->next) { 3088 len = sizeof(struct sadb_x_ipsecrequest) 3089 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 3090 3091 tlen += PFKEY_ALIGN8(len); 3092 } 3093 } 3094 3095 return tlen; 3096 } 3097 3098 /* 3099 * SADB_SPDEXPIRE processing 3100 * send 3101 * <base, address(SD), lifetime(CH), policy> 3102 * to KMD by PF_KEY. 3103 * 3104 * OUT: 0 : succeed 3105 * others : error number 3106 */ 3107 static int 3108 key_spdexpire(struct secpolicy *sp) 3109 { 3110 int s; 3111 struct mbuf *result = NULL, *m; 3112 int len; 3113 int error = -1; 3114 struct sadb_lifetime *lt; 3115 3116 /* XXX: Why do we lock ? */ 3117 s = splsoftnet(); /*called from softclock()*/ 3118 3119 KASSERT(sp != NULL); 3120 3121 /* set msg header */ 3122 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0, M_WAITOK); 3123 result = m; 3124 3125 /* create lifetime extension (current and hard) */ 3126 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 3127 m = key_alloc_mbuf(len, M_WAITOK); 3128 KASSERT(m->m_next == NULL); 3129 3130 memset(mtod(m, void *), 0, len); 3131 lt = mtod(m, struct sadb_lifetime *); 3132 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3133 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3134 lt->sadb_lifetime_allocations = 0; 3135 lt->sadb_lifetime_bytes = 0; 3136 lt->sadb_lifetime_addtime = time_mono_to_wall(sp->created); 3137 lt->sadb_lifetime_usetime = time_mono_to_wall(sp->lastused); 3138 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 3139 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3140 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 3141 lt->sadb_lifetime_allocations = 0; 3142 lt->sadb_lifetime_bytes = 0; 3143 lt->sadb_lifetime_addtime = sp->lifetime; 3144 lt->sadb_lifetime_usetime = sp->validtime; 3145 m_cat(result, m); 3146 3147 /* set sadb_address for source */ 3148 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 3149 sp->spidx.prefs, sp->spidx.ul_proto, M_WAITOK); 3150 m_cat(result, m); 3151 3152 /* set sadb_address for destination */ 3153 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 3154 sp->spidx.prefd, sp->spidx.ul_proto, M_WAITOK); 3155 m_cat(result, m); 3156 3157 /* set secpolicy */ 3158 m = key_sp2msg(sp, M_WAITOK); 3159 m_cat(result, m); 3160 3161 KASSERT(result->m_flags & M_PKTHDR); 3162 KASSERT(result->m_len >= sizeof(struct sadb_msg)); 3163 3164 result->m_pkthdr.len = 0; 3165 for (m = result; m; m = m->m_next) 3166 result->m_pkthdr.len += m->m_len; 3167 3168 mtod(result, struct sadb_msg *)->sadb_msg_len = 3169 PFKEY_UNIT64(result->m_pkthdr.len); 3170 3171 error = key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 3172 splx(s); 3173 return error; 3174 } 3175 3176 /* %%% SAD management */ 3177 /* 3178 * allocating a memory for new SA head, and copy from the values of mhp. 3179 * OUT: NULL : failure due to the lack of memory. 3180 * others : pointer to new SA head. 3181 */ 3182 static struct secashead * 3183 key_newsah(const struct secasindex *saidx) 3184 { 3185 struct secashead *newsah; 3186 int i; 3187 3188 KASSERT(saidx != NULL); 3189 3190 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 3191 for (i = 0; i < __arraycount(newsah->savlist); i++) 3192 PSLIST_INIT(&newsah->savlist[i]); 3193 newsah->saidx = *saidx; 3194 3195 localcount_init(&newsah->localcount); 3196 /* Take a reference for the caller */ 3197 localcount_acquire(&newsah->localcount); 3198 3199 /* Add to the sah list */ 3200 SAHLIST_ENTRY_INIT(newsah); 3201 newsah->state = SADB_SASTATE_MATURE; 3202 mutex_enter(&key_sad.lock); 3203 SAHLIST_WRITER_INSERT_HEAD(newsah); 3204 mutex_exit(&key_sad.lock); 3205 3206 return newsah; 3207 } 3208 3209 static bool 3210 key_sah_has_sav(struct secashead *sah) 3211 { 3212 u_int state; 3213 3214 KASSERT(mutex_owned(&key_sad.lock)); 3215 3216 SASTATE_ANY_FOREACH(state) { 3217 if (!SAVLIST_WRITER_EMPTY(sah, state)) 3218 return true; 3219 } 3220 3221 return false; 3222 } 3223 3224 static void 3225 key_unlink_sah(struct secashead *sah) 3226 { 3227 3228 KASSERT(!cpu_softintr_p()); 3229 KASSERT(mutex_owned(&key_sad.lock)); 3230 KASSERT(sah->state == SADB_SASTATE_DEAD); 3231 3232 /* Remove from the sah list */ 3233 SAHLIST_WRITER_REMOVE(sah); 3234 3235 KDASSERT(mutex_ownable(softnet_lock)); 3236 key_sad_pserialize_perform(); 3237 3238 localcount_drain(&sah->localcount, &key_sad.cv_lc, &key_sad.lock); 3239 } 3240 3241 static void 3242 key_destroy_sah(struct secashead *sah) 3243 { 3244 3245 rtcache_free(&sah->sa_route); 3246 3247 SAHLIST_ENTRY_DESTROY(sah); 3248 localcount_fini(&sah->localcount); 3249 3250 if (sah->idents != NULL) 3251 kmem_free(sah->idents, sah->idents_len); 3252 if (sah->identd != NULL) 3253 kmem_free(sah->identd, sah->identd_len); 3254 3255 kmem_free(sah, sizeof(*sah)); 3256 } 3257 3258 /* 3259 * allocating a new SA with LARVAL state. 3260 * key_api_add() and key_api_getspi() call, 3261 * and copy the values of mhp into new buffer. 3262 * When SAD message type is GETSPI: 3263 * to set sequence number from acq_seq++, 3264 * to set zero to SPI. 3265 * not to call key_setsava(). 3266 * OUT: NULL : fail 3267 * others : pointer to new secasvar. 3268 * 3269 * does not modify mbuf. does not free mbuf on error. 3270 */ 3271 static struct secasvar * 3272 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 3273 int *errp, const char* where, int tag) 3274 { 3275 struct secasvar *newsav; 3276 const struct sadb_sa *xsa; 3277 3278 KASSERT(!cpu_softintr_p()); 3279 KASSERT(m != NULL); 3280 KASSERT(mhp != NULL); 3281 KASSERT(mhp->msg != NULL); 3282 3283 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 3284 3285 switch (mhp->msg->sadb_msg_type) { 3286 case SADB_GETSPI: 3287 newsav->spi = 0; 3288 3289 #ifdef IPSEC_DOSEQCHECK 3290 /* sync sequence number */ 3291 if (mhp->msg->sadb_msg_seq == 0) 3292 newsav->seq = 3293 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 3294 else 3295 #endif 3296 newsav->seq = mhp->msg->sadb_msg_seq; 3297 break; 3298 3299 case SADB_ADD: 3300 /* sanity check */ 3301 if (mhp->ext[SADB_EXT_SA] == NULL) { 3302 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 3303 *errp = EINVAL; 3304 goto error; 3305 } 3306 xsa = mhp->ext[SADB_EXT_SA]; 3307 newsav->spi = xsa->sadb_sa_spi; 3308 newsav->seq = mhp->msg->sadb_msg_seq; 3309 break; 3310 default: 3311 *errp = EINVAL; 3312 goto error; 3313 } 3314 3315 /* copy sav values */ 3316 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 3317 *errp = key_setsaval(newsav, m, mhp); 3318 if (*errp) 3319 goto error; 3320 } else { 3321 /* We don't allow lft_c to be NULL */ 3322 newsav->lft_c = kmem_zalloc(sizeof(struct sadb_lifetime), 3323 KM_SLEEP); 3324 newsav->lft_c_counters_percpu = 3325 percpu_alloc(sizeof(lifetime_counters_t)); 3326 } 3327 3328 /* reset created */ 3329 newsav->created = time_uptime; 3330 newsav->pid = mhp->msg->sadb_msg_pid; 3331 3332 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3333 "DP from %s:%u return SA:%p\n", where, tag, newsav); 3334 return newsav; 3335 3336 error: 3337 KASSERT(*errp != 0); 3338 kmem_free(newsav, sizeof(*newsav)); 3339 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3340 "DP from %s:%u return SA:NULL\n", where, tag); 3341 return NULL; 3342 } 3343 3344 3345 static void 3346 key_clear_xform(struct secasvar *sav) 3347 { 3348 3349 /* 3350 * Cleanup xform state. Note that zeroize'ing causes the 3351 * keys to be cleared; otherwise we must do it ourself. 3352 */ 3353 if (sav->tdb_xform != NULL) { 3354 sav->tdb_xform->xf_zeroize(sav); 3355 sav->tdb_xform = NULL; 3356 } else { 3357 if (sav->key_auth != NULL) 3358 explicit_memset(_KEYBUF(sav->key_auth), 0, 3359 _KEYLEN(sav->key_auth)); 3360 if (sav->key_enc != NULL) 3361 explicit_memset(_KEYBUF(sav->key_enc), 0, 3362 _KEYLEN(sav->key_enc)); 3363 } 3364 } 3365 3366 /* 3367 * free() SA variable entry. 3368 */ 3369 static void 3370 key_delsav(struct secasvar *sav) 3371 { 3372 3373 key_clear_xform(sav); 3374 key_freesaval(sav); 3375 kmem_free(sav, sizeof(*sav)); 3376 } 3377 3378 /* 3379 * Must be called in a pserialize read section. A held sah 3380 * must be released by key_sah_unref after use. 3381 */ 3382 static void 3383 key_sah_ref(struct secashead *sah) 3384 { 3385 3386 localcount_acquire(&sah->localcount); 3387 } 3388 3389 /* 3390 * Must be called without holding key_sad.lock because the lock 3391 * would be held in localcount_release. 3392 */ 3393 static void 3394 key_sah_unref(struct secashead *sah) 3395 { 3396 3397 KDASSERT(mutex_ownable(&key_sad.lock)); 3398 3399 localcount_release(&sah->localcount, &key_sad.cv_lc, &key_sad.lock); 3400 } 3401 3402 /* 3403 * Search SAD and return sah. Must be called in a pserialize 3404 * read section. 3405 * OUT: 3406 * NULL : not found 3407 * others : found, pointer to a SA. 3408 */ 3409 static struct secashead * 3410 key_getsah(const struct secasindex *saidx, int flag) 3411 { 3412 struct secashead *sah; 3413 3414 SAHLIST_READER_FOREACH_SAIDX(sah, saidx) { 3415 if (sah->state == SADB_SASTATE_DEAD) 3416 continue; 3417 if (key_saidx_match(&sah->saidx, saidx, flag)) 3418 return sah; 3419 } 3420 3421 return NULL; 3422 } 3423 3424 /* 3425 * Search SAD and return sah. If sah is returned, the caller must call 3426 * key_sah_unref to releaset a reference. 3427 * OUT: 3428 * NULL : not found 3429 * others : found, pointer to a SA. 3430 */ 3431 static struct secashead * 3432 key_getsah_ref(const struct secasindex *saidx, int flag) 3433 { 3434 struct secashead *sah; 3435 int s; 3436 3437 s = pserialize_read_enter(); 3438 sah = key_getsah(saidx, flag); 3439 if (sah != NULL) 3440 key_sah_ref(sah); 3441 pserialize_read_exit(s); 3442 3443 return sah; 3444 } 3445 3446 /* 3447 * check not to be duplicated SPI. 3448 * NOTE: this function is too slow due to searching all SAD. 3449 * OUT: 3450 * NULL : not found 3451 * others : found, pointer to a SA. 3452 */ 3453 static bool 3454 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3455 { 3456 struct secashead *sah; 3457 struct secasvar *sav; 3458 int s; 3459 3460 /* check address family */ 3461 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3462 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3463 return false; 3464 } 3465 3466 /* check all SAD */ 3467 s = pserialize_read_enter(); 3468 SAHLIST_READER_FOREACH(sah) { 3469 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3470 continue; 3471 sav = key_getsavbyspi(sah, spi); 3472 if (sav != NULL) { 3473 pserialize_read_exit(s); 3474 KEY_SA_UNREF(&sav); 3475 return true; 3476 } 3477 } 3478 pserialize_read_exit(s); 3479 3480 return false; 3481 } 3482 3483 /* 3484 * search SAD litmited alive SA, protocol, SPI. 3485 * OUT: 3486 * NULL : not found 3487 * others : found, pointer to a SA. 3488 */ 3489 static struct secasvar * 3490 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3491 { 3492 struct secasvar *sav = NULL; 3493 u_int state; 3494 int s; 3495 3496 /* search all status */ 3497 s = pserialize_read_enter(); 3498 SASTATE_ALIVE_FOREACH(state) { 3499 SAVLIST_READER_FOREACH(sav, sah, state) { 3500 /* sanity check */ 3501 if (sav->state != state) { 3502 IPSECLOG(LOG_DEBUG, 3503 "invalid sav->state (queue: %d SA: %d)\n", 3504 state, sav->state); 3505 continue; 3506 } 3507 3508 if (sav->spi == spi) { 3509 KEY_SA_REF(sav); 3510 goto out; 3511 } 3512 } 3513 } 3514 out: 3515 pserialize_read_exit(s); 3516 3517 return sav; 3518 } 3519 3520 /* 3521 * Free allocated data to member variables of sav: 3522 * sav->replay, sav->key_* and sav->lft_*. 3523 */ 3524 static void 3525 key_freesaval(struct secasvar *sav) 3526 { 3527 3528 KASSERT(key_sa_refcnt(sav) == 0); 3529 3530 if (sav->replay != NULL) 3531 kmem_intr_free(sav->replay, sav->replay_len); 3532 if (sav->key_auth != NULL) 3533 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3534 if (sav->key_enc != NULL) 3535 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3536 if (sav->lft_c_counters_percpu != NULL) { 3537 percpu_free(sav->lft_c_counters_percpu, 3538 sizeof(lifetime_counters_t)); 3539 } 3540 if (sav->lft_c != NULL) 3541 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3542 if (sav->lft_h != NULL) 3543 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3544 if (sav->lft_s != NULL) 3545 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3546 } 3547 3548 /* 3549 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3550 * You must update these if need. 3551 * OUT: 0: success. 3552 * !0: failure. 3553 * 3554 * does not modify mbuf. does not free mbuf on error. 3555 */ 3556 static int 3557 key_setsaval(struct secasvar *sav, struct mbuf *m, 3558 const struct sadb_msghdr *mhp) 3559 { 3560 int error = 0; 3561 3562 KASSERT(!cpu_softintr_p()); 3563 KASSERT(m != NULL); 3564 KASSERT(mhp != NULL); 3565 KASSERT(mhp->msg != NULL); 3566 3567 /* We shouldn't initialize sav variables while someone uses it. */ 3568 KASSERT(key_sa_refcnt(sav) == 0); 3569 3570 /* SA */ 3571 if (mhp->ext[SADB_EXT_SA] != NULL) { 3572 const struct sadb_sa *sa0; 3573 3574 sa0 = mhp->ext[SADB_EXT_SA]; 3575 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3576 error = EINVAL; 3577 goto fail; 3578 } 3579 3580 sav->alg_auth = sa0->sadb_sa_auth; 3581 sav->alg_enc = sa0->sadb_sa_encrypt; 3582 sav->flags = sa0->sadb_sa_flags; 3583 3584 /* replay window */ 3585 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3586 size_t len = sizeof(struct secreplay) + 3587 sa0->sadb_sa_replay; 3588 sav->replay = kmem_zalloc(len, KM_SLEEP); 3589 sav->replay_len = len; 3590 if (sa0->sadb_sa_replay != 0) 3591 sav->replay->bitmap = (char*)(sav->replay+1); 3592 sav->replay->wsize = sa0->sadb_sa_replay; 3593 } 3594 } 3595 3596 /* Authentication keys */ 3597 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3598 const struct sadb_key *key0; 3599 int len; 3600 3601 key0 = mhp->ext[SADB_EXT_KEY_AUTH]; 3602 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3603 3604 error = 0; 3605 if (len < sizeof(*key0)) { 3606 error = EINVAL; 3607 goto fail; 3608 } 3609 switch (mhp->msg->sadb_msg_satype) { 3610 case SADB_SATYPE_AH: 3611 case SADB_SATYPE_ESP: 3612 case SADB_X_SATYPE_TCPSIGNATURE: 3613 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3614 sav->alg_auth != SADB_X_AALG_NULL) 3615 error = EINVAL; 3616 break; 3617 case SADB_X_SATYPE_IPCOMP: 3618 default: 3619 error = EINVAL; 3620 break; 3621 } 3622 if (error) { 3623 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3624 goto fail; 3625 } 3626 3627 sav->key_auth = key_newbuf(key0, len); 3628 sav->key_auth_len = len; 3629 } 3630 3631 /* Encryption key */ 3632 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3633 const struct sadb_key *key0; 3634 int len; 3635 3636 key0 = mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3637 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3638 3639 error = 0; 3640 if (len < sizeof(*key0)) { 3641 error = EINVAL; 3642 goto fail; 3643 } 3644 switch (mhp->msg->sadb_msg_satype) { 3645 case SADB_SATYPE_ESP: 3646 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3647 sav->alg_enc != SADB_EALG_NULL) { 3648 error = EINVAL; 3649 break; 3650 } 3651 sav->key_enc = key_newbuf(key0, len); 3652 sav->key_enc_len = len; 3653 break; 3654 case SADB_X_SATYPE_IPCOMP: 3655 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3656 error = EINVAL; 3657 sav->key_enc = NULL; /*just in case*/ 3658 break; 3659 case SADB_SATYPE_AH: 3660 case SADB_X_SATYPE_TCPSIGNATURE: 3661 default: 3662 error = EINVAL; 3663 break; 3664 } 3665 if (error) { 3666 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3667 goto fail; 3668 } 3669 } 3670 3671 /* set iv */ 3672 sav->ivlen = 0; 3673 3674 switch (mhp->msg->sadb_msg_satype) { 3675 case SADB_SATYPE_AH: 3676 error = xform_init(sav, XF_AH); 3677 break; 3678 case SADB_SATYPE_ESP: 3679 error = xform_init(sav, XF_ESP); 3680 break; 3681 case SADB_X_SATYPE_IPCOMP: 3682 error = xform_init(sav, XF_IPCOMP); 3683 break; 3684 case SADB_X_SATYPE_TCPSIGNATURE: 3685 error = xform_init(sav, XF_TCPSIGNATURE); 3686 break; 3687 } 3688 if (error) { 3689 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3690 mhp->msg->sadb_msg_satype); 3691 goto fail; 3692 } 3693 3694 /* reset created */ 3695 sav->created = time_uptime; 3696 3697 /* make lifetime for CURRENT */ 3698 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3699 3700 sav->lft_c->sadb_lifetime_len = 3701 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3702 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3703 sav->lft_c->sadb_lifetime_allocations = 0; 3704 sav->lft_c->sadb_lifetime_bytes = 0; 3705 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3706 sav->lft_c->sadb_lifetime_usetime = 0; 3707 3708 sav->lft_c_counters_percpu = percpu_alloc(sizeof(lifetime_counters_t)); 3709 3710 /* lifetimes for HARD and SOFT */ 3711 { 3712 const struct sadb_lifetime *lft0; 3713 3714 lft0 = mhp->ext[SADB_EXT_LIFETIME_HARD]; 3715 if (lft0 != NULL) { 3716 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3717 error = EINVAL; 3718 goto fail; 3719 } 3720 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3721 } 3722 3723 lft0 = mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3724 if (lft0 != NULL) { 3725 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3726 error = EINVAL; 3727 goto fail; 3728 } 3729 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3730 /* to be initialize ? */ 3731 } 3732 } 3733 3734 return 0; 3735 3736 fail: 3737 key_clear_xform(sav); 3738 key_freesaval(sav); 3739 3740 return error; 3741 } 3742 3743 /* 3744 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3745 * OUT: 0: valid 3746 * other: errno 3747 */ 3748 static int 3749 key_init_xform(struct secasvar *sav) 3750 { 3751 int error; 3752 3753 /* We shouldn't initialize sav variables while someone uses it. */ 3754 KASSERT(key_sa_refcnt(sav) == 0); 3755 3756 /* check SPI value */ 3757 switch (sav->sah->saidx.proto) { 3758 case IPPROTO_ESP: 3759 case IPPROTO_AH: 3760 if (ntohl(sav->spi) <= 255) { 3761 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3762 (u_int32_t)ntohl(sav->spi)); 3763 return EINVAL; 3764 } 3765 break; 3766 } 3767 3768 /* check satype */ 3769 switch (sav->sah->saidx.proto) { 3770 case IPPROTO_ESP: 3771 /* check flags */ 3772 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3773 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3774 IPSECLOG(LOG_DEBUG, 3775 "invalid flag (derived) given to old-esp.\n"); 3776 return EINVAL; 3777 } 3778 error = xform_init(sav, XF_ESP); 3779 break; 3780 case IPPROTO_AH: 3781 /* check flags */ 3782 if (sav->flags & SADB_X_EXT_DERIV) { 3783 IPSECLOG(LOG_DEBUG, 3784 "invalid flag (derived) given to AH SA.\n"); 3785 return EINVAL; 3786 } 3787 if (sav->alg_enc != SADB_EALG_NONE) { 3788 IPSECLOG(LOG_DEBUG, 3789 "protocol and algorithm mismated.\n"); 3790 return(EINVAL); 3791 } 3792 error = xform_init(sav, XF_AH); 3793 break; 3794 case IPPROTO_IPCOMP: 3795 if (sav->alg_auth != SADB_AALG_NONE) { 3796 IPSECLOG(LOG_DEBUG, 3797 "protocol and algorithm mismated.\n"); 3798 return(EINVAL); 3799 } 3800 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3801 && ntohl(sav->spi) >= 0x10000) { 3802 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3803 return(EINVAL); 3804 } 3805 error = xform_init(sav, XF_IPCOMP); 3806 break; 3807 case IPPROTO_TCP: 3808 if (sav->alg_enc != SADB_EALG_NONE) { 3809 IPSECLOG(LOG_DEBUG, 3810 "protocol and algorithm mismated.\n"); 3811 return(EINVAL); 3812 } 3813 error = xform_init(sav, XF_TCPSIGNATURE); 3814 break; 3815 default: 3816 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3817 error = EPROTONOSUPPORT; 3818 break; 3819 } 3820 3821 return error; 3822 } 3823 3824 /* 3825 * subroutine for SADB_GET and SADB_DUMP. It never return NULL. 3826 */ 3827 static struct mbuf * 3828 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3829 u_int32_t seq, u_int32_t pid) 3830 { 3831 struct mbuf *result = NULL, *tres = NULL, *m; 3832 int l = 0; 3833 int i; 3834 void *p; 3835 struct sadb_lifetime lt; 3836 int dumporder[] = { 3837 SADB_EXT_SA, SADB_X_EXT_SA2, 3838 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3839 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3840 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3841 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3842 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3843 SADB_X_EXT_NAT_T_TYPE, 3844 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3845 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3846 SADB_X_EXT_NAT_T_FRAG, 3847 3848 }; 3849 3850 m = key_setsadbmsg(type, 0, satype, seq, pid, key_sa_refcnt(sav), M_WAITOK); 3851 result = m; 3852 3853 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3854 m = NULL; 3855 p = NULL; 3856 switch (dumporder[i]) { 3857 case SADB_EXT_SA: 3858 m = key_setsadbsa(sav); 3859 break; 3860 3861 case SADB_X_EXT_SA2: 3862 m = key_setsadbxsa2(sav->sah->saidx.mode, 3863 sav->replay ? sav->replay->count : 0, 3864 sav->sah->saidx.reqid); 3865 break; 3866 3867 case SADB_EXT_ADDRESS_SRC: 3868 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3869 &sav->sah->saidx.src.sa, 3870 FULLMASK, IPSEC_ULPROTO_ANY, M_WAITOK); 3871 break; 3872 3873 case SADB_EXT_ADDRESS_DST: 3874 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3875 &sav->sah->saidx.dst.sa, 3876 FULLMASK, IPSEC_ULPROTO_ANY, M_WAITOK); 3877 break; 3878 3879 case SADB_EXT_KEY_AUTH: 3880 if (!sav->key_auth) 3881 continue; 3882 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3883 p = sav->key_auth; 3884 break; 3885 3886 case SADB_EXT_KEY_ENCRYPT: 3887 if (!sav->key_enc) 3888 continue; 3889 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3890 p = sav->key_enc; 3891 break; 3892 3893 case SADB_EXT_LIFETIME_CURRENT: { 3894 lifetime_counters_t sum = {0}; 3895 3896 KASSERT(sav->lft_c != NULL); 3897 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3898 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3899 lt.sadb_lifetime_addtime = 3900 time_mono_to_wall(lt.sadb_lifetime_addtime); 3901 lt.sadb_lifetime_usetime = 3902 time_mono_to_wall(lt.sadb_lifetime_usetime); 3903 percpu_foreach(sav->lft_c_counters_percpu, 3904 key_sum_lifetime_counters, sum); 3905 lt.sadb_lifetime_allocations = 3906 sum[LIFETIME_COUNTER_ALLOCATIONS]; 3907 lt.sadb_lifetime_bytes = 3908 sum[LIFETIME_COUNTER_BYTES]; 3909 p = < 3910 break; 3911 } 3912 3913 case SADB_EXT_LIFETIME_HARD: 3914 if (!sav->lft_h) 3915 continue; 3916 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3917 p = sav->lft_h; 3918 break; 3919 3920 case SADB_EXT_LIFETIME_SOFT: 3921 if (!sav->lft_s) 3922 continue; 3923 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3924 p = sav->lft_s; 3925 break; 3926 3927 case SADB_X_EXT_NAT_T_TYPE: 3928 m = key_setsadbxtype(sav->natt_type); 3929 break; 3930 3931 case SADB_X_EXT_NAT_T_DPORT: 3932 if (sav->natt_type == 0) 3933 continue; 3934 m = key_setsadbxport( 3935 key_portfromsaddr(&sav->sah->saidx.dst), 3936 SADB_X_EXT_NAT_T_DPORT); 3937 break; 3938 3939 case SADB_X_EXT_NAT_T_SPORT: 3940 if (sav->natt_type == 0) 3941 continue; 3942 m = key_setsadbxport( 3943 key_portfromsaddr(&sav->sah->saidx.src), 3944 SADB_X_EXT_NAT_T_SPORT); 3945 break; 3946 3947 case SADB_X_EXT_NAT_T_FRAG: 3948 /* don't send frag info if not set */ 3949 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3950 continue; 3951 m = key_setsadbxfrag(sav->esp_frag); 3952 break; 3953 3954 case SADB_X_EXT_NAT_T_OAI: 3955 case SADB_X_EXT_NAT_T_OAR: 3956 continue; 3957 3958 case SADB_EXT_ADDRESS_PROXY: 3959 case SADB_EXT_IDENTITY_SRC: 3960 case SADB_EXT_IDENTITY_DST: 3961 /* XXX: should we brought from SPD ? */ 3962 case SADB_EXT_SENSITIVITY: 3963 default: 3964 continue; 3965 } 3966 3967 KASSERT(!(m && p)); 3968 KASSERT(m != NULL || p != NULL); 3969 if (p && tres) { 3970 M_PREPEND(tres, l, M_WAITOK); 3971 memcpy(mtod(tres, void *), p, l); 3972 continue; 3973 } 3974 if (p) { 3975 m = key_alloc_mbuf(l, M_WAITOK); 3976 m_copyback(m, 0, l, p); 3977 } 3978 3979 if (tres) 3980 m_cat(m, tres); 3981 tres = m; 3982 } 3983 3984 m_cat(result, tres); 3985 tres = NULL; /* avoid free on error below */ 3986 3987 KASSERT(result->m_len >= sizeof(struct sadb_msg)); 3988 3989 result->m_pkthdr.len = 0; 3990 for (m = result; m; m = m->m_next) 3991 result->m_pkthdr.len += m->m_len; 3992 3993 mtod(result, struct sadb_msg *)->sadb_msg_len = 3994 PFKEY_UNIT64(result->m_pkthdr.len); 3995 3996 return result; 3997 } 3998 3999 4000 /* 4001 * set a type in sadb_x_nat_t_type 4002 */ 4003 static struct mbuf * 4004 key_setsadbxtype(u_int16_t type) 4005 { 4006 struct mbuf *m; 4007 size_t len; 4008 struct sadb_x_nat_t_type *p; 4009 4010 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 4011 4012 m = key_alloc_mbuf(len, M_WAITOK); 4013 KASSERT(m->m_next == NULL); 4014 4015 p = mtod(m, struct sadb_x_nat_t_type *); 4016 4017 memset(p, 0, len); 4018 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 4019 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 4020 p->sadb_x_nat_t_type_type = type; 4021 4022 return m; 4023 } 4024 /* 4025 * set a port in sadb_x_nat_t_port. port is in network order 4026 */ 4027 static struct mbuf * 4028 key_setsadbxport(u_int16_t port, u_int16_t type) 4029 { 4030 struct mbuf *m; 4031 size_t len; 4032 struct sadb_x_nat_t_port *p; 4033 4034 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 4035 4036 m = key_alloc_mbuf(len, M_WAITOK); 4037 KASSERT(m->m_next == NULL); 4038 4039 p = mtod(m, struct sadb_x_nat_t_port *); 4040 4041 memset(p, 0, len); 4042 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 4043 p->sadb_x_nat_t_port_exttype = type; 4044 p->sadb_x_nat_t_port_port = port; 4045 4046 return m; 4047 } 4048 4049 /* 4050 * set fragmentation info in sadb_x_nat_t_frag 4051 */ 4052 static struct mbuf * 4053 key_setsadbxfrag(u_int16_t flen) 4054 { 4055 struct mbuf *m; 4056 size_t len; 4057 struct sadb_x_nat_t_frag *p; 4058 4059 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 4060 4061 m = key_alloc_mbuf(len, M_WAITOK); 4062 KASSERT(m->m_next == NULL); 4063 4064 p = mtod(m, struct sadb_x_nat_t_frag *); 4065 4066 memset(p, 0, len); 4067 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 4068 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 4069 p->sadb_x_nat_t_frag_fraglen = flen; 4070 4071 return m; 4072 } 4073 4074 /* 4075 * Get port from sockaddr, port is in network order 4076 */ 4077 u_int16_t 4078 key_portfromsaddr(const union sockaddr_union *saddr) 4079 { 4080 u_int16_t port; 4081 4082 switch (saddr->sa.sa_family) { 4083 case AF_INET: { 4084 port = saddr->sin.sin_port; 4085 break; 4086 } 4087 #ifdef INET6 4088 case AF_INET6: { 4089 port = saddr->sin6.sin6_port; 4090 break; 4091 } 4092 #endif 4093 default: 4094 printf("%s: unexpected address family\n", __func__); 4095 port = 0; 4096 break; 4097 } 4098 4099 return port; 4100 } 4101 4102 4103 /* 4104 * Set port is struct sockaddr. port is in network order 4105 */ 4106 static void 4107 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 4108 { 4109 switch (saddr->sa.sa_family) { 4110 case AF_INET: { 4111 saddr->sin.sin_port = port; 4112 break; 4113 } 4114 #ifdef INET6 4115 case AF_INET6: { 4116 saddr->sin6.sin6_port = port; 4117 break; 4118 } 4119 #endif 4120 default: 4121 printf("%s: unexpected address family %d\n", __func__, 4122 saddr->sa.sa_family); 4123 break; 4124 } 4125 4126 return; 4127 } 4128 4129 /* 4130 * Safety check sa_len 4131 */ 4132 static int 4133 key_checksalen(const union sockaddr_union *saddr) 4134 { 4135 switch (saddr->sa.sa_family) { 4136 case AF_INET: 4137 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 4138 return -1; 4139 break; 4140 #ifdef INET6 4141 case AF_INET6: 4142 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 4143 return -1; 4144 break; 4145 #endif 4146 default: 4147 printf("%s: unexpected sa_family %d\n", __func__, 4148 saddr->sa.sa_family); 4149 return -1; 4150 break; 4151 } 4152 return 0; 4153 } 4154 4155 4156 /* 4157 * set data into sadb_msg. 4158 */ 4159 static struct mbuf * 4160 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 4161 u_int32_t seq, pid_t pid, u_int16_t reserved, int mflag) 4162 { 4163 struct mbuf *m; 4164 struct sadb_msg *p; 4165 int len; 4166 4167 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 4168 4169 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 4170 4171 m = key_alloc_mbuf_simple(len, mflag); 4172 if (!m) 4173 return NULL; 4174 m->m_pkthdr.len = m->m_len = len; 4175 m->m_next = NULL; 4176 4177 p = mtod(m, struct sadb_msg *); 4178 4179 memset(p, 0, len); 4180 p->sadb_msg_version = PF_KEY_V2; 4181 p->sadb_msg_type = type; 4182 p->sadb_msg_errno = 0; 4183 p->sadb_msg_satype = satype; 4184 p->sadb_msg_len = PFKEY_UNIT64(tlen); 4185 p->sadb_msg_reserved = reserved; 4186 p->sadb_msg_seq = seq; 4187 p->sadb_msg_pid = (u_int32_t)pid; 4188 4189 return m; 4190 } 4191 4192 /* 4193 * copy secasvar data into sadb_address. 4194 */ 4195 static struct mbuf * 4196 key_setsadbsa(struct secasvar *sav) 4197 { 4198 struct mbuf *m; 4199 struct sadb_sa *p; 4200 int len; 4201 4202 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 4203 m = key_alloc_mbuf(len, M_WAITOK); 4204 KASSERT(m->m_next == NULL); 4205 4206 p = mtod(m, struct sadb_sa *); 4207 4208 memset(p, 0, len); 4209 p->sadb_sa_len = PFKEY_UNIT64(len); 4210 p->sadb_sa_exttype = SADB_EXT_SA; 4211 p->sadb_sa_spi = sav->spi; 4212 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 4213 p->sadb_sa_state = sav->state; 4214 p->sadb_sa_auth = sav->alg_auth; 4215 p->sadb_sa_encrypt = sav->alg_enc; 4216 p->sadb_sa_flags = sav->flags; 4217 4218 return m; 4219 } 4220 4221 /* 4222 * set data into sadb_address. 4223 */ 4224 static struct mbuf * 4225 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 4226 u_int8_t prefixlen, u_int16_t ul_proto, int mflag) 4227 { 4228 struct mbuf *m; 4229 struct sadb_address *p; 4230 size_t len; 4231 4232 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 4233 PFKEY_ALIGN8(saddr->sa_len); 4234 m = key_alloc_mbuf(len, mflag); 4235 if (!m || m->m_next) { /*XXX*/ 4236 if (m) 4237 m_freem(m); 4238 return NULL; 4239 } 4240 4241 p = mtod(m, struct sadb_address *); 4242 4243 memset(p, 0, len); 4244 p->sadb_address_len = PFKEY_UNIT64(len); 4245 p->sadb_address_exttype = exttype; 4246 p->sadb_address_proto = ul_proto; 4247 if (prefixlen == FULLMASK) { 4248 switch (saddr->sa_family) { 4249 case AF_INET: 4250 prefixlen = sizeof(struct in_addr) << 3; 4251 break; 4252 case AF_INET6: 4253 prefixlen = sizeof(struct in6_addr) << 3; 4254 break; 4255 default: 4256 ; /*XXX*/ 4257 } 4258 } 4259 p->sadb_address_prefixlen = prefixlen; 4260 p->sadb_address_reserved = 0; 4261 4262 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 4263 saddr, saddr->sa_len); 4264 4265 return m; 4266 } 4267 4268 #if 0 4269 /* 4270 * set data into sadb_ident. 4271 */ 4272 static struct mbuf * 4273 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 4274 void *string, int stringlen, u_int64_t id) 4275 { 4276 struct mbuf *m; 4277 struct sadb_ident *p; 4278 size_t len; 4279 4280 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 4281 m = key_alloc_mbuf(len); 4282 if (!m || m->m_next) { /*XXX*/ 4283 if (m) 4284 m_freem(m); 4285 return NULL; 4286 } 4287 4288 p = mtod(m, struct sadb_ident *); 4289 4290 memset(p, 0, len); 4291 p->sadb_ident_len = PFKEY_UNIT64(len); 4292 p->sadb_ident_exttype = exttype; 4293 p->sadb_ident_type = idtype; 4294 p->sadb_ident_reserved = 0; 4295 p->sadb_ident_id = id; 4296 4297 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 4298 string, stringlen); 4299 4300 return m; 4301 } 4302 #endif 4303 4304 /* 4305 * set data into sadb_x_sa2. 4306 */ 4307 static struct mbuf * 4308 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4309 { 4310 struct mbuf *m; 4311 struct sadb_x_sa2 *p; 4312 size_t len; 4313 4314 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4315 m = key_alloc_mbuf(len, M_WAITOK); 4316 KASSERT(m->m_next == NULL); 4317 4318 p = mtod(m, struct sadb_x_sa2 *); 4319 4320 memset(p, 0, len); 4321 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4322 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4323 p->sadb_x_sa2_mode = mode; 4324 p->sadb_x_sa2_reserved1 = 0; 4325 p->sadb_x_sa2_reserved2 = 0; 4326 p->sadb_x_sa2_sequence = seq; 4327 p->sadb_x_sa2_reqid = reqid; 4328 4329 return m; 4330 } 4331 4332 /* 4333 * set data into sadb_x_policy 4334 */ 4335 static struct mbuf * 4336 key_setsadbxpolicy(const u_int16_t type, const u_int8_t dir, const u_int32_t id, 4337 int mflag) 4338 { 4339 struct mbuf *m; 4340 struct sadb_x_policy *p; 4341 size_t len; 4342 4343 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4344 m = key_alloc_mbuf(len, mflag); 4345 if (!m || m->m_next) { /*XXX*/ 4346 if (m) 4347 m_freem(m); 4348 return NULL; 4349 } 4350 4351 p = mtod(m, struct sadb_x_policy *); 4352 4353 memset(p, 0, len); 4354 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4355 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4356 p->sadb_x_policy_type = type; 4357 p->sadb_x_policy_dir = dir; 4358 p->sadb_x_policy_id = id; 4359 4360 return m; 4361 } 4362 4363 /* %%% utilities */ 4364 /* 4365 * copy a buffer into the new buffer allocated. 4366 */ 4367 static void * 4368 key_newbuf(const void *src, u_int len) 4369 { 4370 void *new; 4371 4372 new = kmem_alloc(len, KM_SLEEP); 4373 memcpy(new, src, len); 4374 4375 return new; 4376 } 4377 4378 /* compare my own address 4379 * OUT: 1: true, i.e. my address. 4380 * 0: false 4381 */ 4382 int 4383 key_ismyaddr(const struct sockaddr *sa) 4384 { 4385 #ifdef INET 4386 const struct sockaddr_in *sin; 4387 const struct in_ifaddr *ia; 4388 int s; 4389 #endif 4390 4391 KASSERT(sa != NULL); 4392 4393 switch (sa->sa_family) { 4394 #ifdef INET 4395 case AF_INET: 4396 sin = (const struct sockaddr_in *)sa; 4397 s = pserialize_read_enter(); 4398 IN_ADDRLIST_READER_FOREACH(ia) { 4399 if (sin->sin_family == ia->ia_addr.sin_family && 4400 sin->sin_len == ia->ia_addr.sin_len && 4401 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4402 { 4403 pserialize_read_exit(s); 4404 return 1; 4405 } 4406 } 4407 pserialize_read_exit(s); 4408 break; 4409 #endif 4410 #ifdef INET6 4411 case AF_INET6: 4412 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4413 #endif 4414 } 4415 4416 return 0; 4417 } 4418 4419 #ifdef INET6 4420 /* 4421 * compare my own address for IPv6. 4422 * 1: ours 4423 * 0: other 4424 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4425 */ 4426 #include <netinet6/in6_var.h> 4427 4428 static int 4429 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4430 { 4431 struct in6_ifaddr *ia; 4432 int s; 4433 struct psref psref; 4434 int bound; 4435 int ours = 1; 4436 4437 bound = curlwp_bind(); 4438 s = pserialize_read_enter(); 4439 IN6_ADDRLIST_READER_FOREACH(ia) { 4440 bool ingroup; 4441 4442 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4443 (const struct sockaddr *)&ia->ia_addr, 0)) { 4444 pserialize_read_exit(s); 4445 goto ours; 4446 } 4447 ia6_acquire(ia, &psref); 4448 pserialize_read_exit(s); 4449 4450 /* 4451 * XXX Multicast 4452 * XXX why do we care about multlicast here while we don't care 4453 * about IPv4 multicast?? 4454 * XXX scope 4455 */ 4456 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4457 if (ingroup) { 4458 ia6_release(ia, &psref); 4459 goto ours; 4460 } 4461 4462 s = pserialize_read_enter(); 4463 ia6_release(ia, &psref); 4464 } 4465 pserialize_read_exit(s); 4466 4467 /* loopback, just for safety */ 4468 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4469 goto ours; 4470 4471 ours = 0; 4472 ours: 4473 curlwp_bindx(bound); 4474 4475 return ours; 4476 } 4477 #endif /*INET6*/ 4478 4479 /* 4480 * compare two secasindex structure. 4481 * flag can specify to compare 2 saidxes. 4482 * compare two secasindex structure without both mode and reqid. 4483 * don't compare port. 4484 * IN: 4485 * saidx0: source, it can be in SAD. 4486 * saidx1: object. 4487 * OUT: 4488 * 1 : equal 4489 * 0 : not equal 4490 */ 4491 static int 4492 key_saidx_match( 4493 const struct secasindex *saidx0, 4494 const struct secasindex *saidx1, 4495 int flag) 4496 { 4497 int chkport; 4498 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4499 4500 KASSERT(saidx0 != NULL); 4501 KASSERT(saidx1 != NULL); 4502 4503 /* sanity */ 4504 if (saidx0->proto != saidx1->proto) 4505 return 0; 4506 4507 if (flag == CMP_EXACTLY) { 4508 if (saidx0->mode != saidx1->mode) 4509 return 0; 4510 if (saidx0->reqid != saidx1->reqid) 4511 return 0; 4512 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4513 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4514 return 0; 4515 } else { 4516 4517 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4518 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4519 /* 4520 * If reqid of SPD is non-zero, unique SA is required. 4521 * The result must be of same reqid in this case. 4522 */ 4523 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4524 return 0; 4525 } 4526 4527 if (flag == CMP_MODE_REQID) { 4528 if (saidx0->mode != IPSEC_MODE_ANY && 4529 saidx0->mode != saidx1->mode) 4530 return 0; 4531 } 4532 4533 4534 sa0src = &saidx0->src.sa; 4535 sa0dst = &saidx0->dst.sa; 4536 sa1src = &saidx1->src.sa; 4537 sa1dst = &saidx1->dst.sa; 4538 /* 4539 * If NAT-T is enabled, check ports for tunnel mode. 4540 * Don't do it for transport mode, as there is no 4541 * port information available in the SP. 4542 * Also don't check ports if they are set to zero 4543 * in the SPD: This means we have a non-generated 4544 * SPD which can't know UDP ports. 4545 */ 4546 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4547 chkport = PORT_LOOSE; 4548 else 4549 chkport = PORT_NONE; 4550 4551 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4552 return 0; 4553 } 4554 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4555 return 0; 4556 } 4557 } 4558 4559 return 1; 4560 } 4561 4562 /* 4563 * compare two secindex structure exactly. 4564 * IN: 4565 * spidx0: source, it is often in SPD. 4566 * spidx1: object, it is often from PFKEY message. 4567 * OUT: 4568 * 1 : equal 4569 * 0 : not equal 4570 */ 4571 static int 4572 key_spidx_match_exactly( 4573 const struct secpolicyindex *spidx0, 4574 const struct secpolicyindex *spidx1) 4575 { 4576 4577 KASSERT(spidx0 != NULL); 4578 KASSERT(spidx1 != NULL); 4579 4580 /* sanity */ 4581 if (spidx0->prefs != spidx1->prefs || 4582 spidx0->prefd != spidx1->prefd || 4583 spidx0->ul_proto != spidx1->ul_proto) 4584 return 0; 4585 4586 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4587 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4588 } 4589 4590 /* 4591 * compare two secindex structure with mask. 4592 * IN: 4593 * spidx0: source, it is often in SPD. 4594 * spidx1: object, it is often from IP header. 4595 * OUT: 4596 * 1 : equal 4597 * 0 : not equal 4598 */ 4599 static int 4600 key_spidx_match_withmask( 4601 const struct secpolicyindex *spidx0, 4602 const struct secpolicyindex *spidx1) 4603 { 4604 4605 KASSERT(spidx0 != NULL); 4606 KASSERT(spidx1 != NULL); 4607 4608 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4609 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4610 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4611 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4612 return 0; 4613 4614 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4615 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4616 spidx0->ul_proto != spidx1->ul_proto) 4617 return 0; 4618 4619 switch (spidx0->src.sa.sa_family) { 4620 case AF_INET: 4621 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4622 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4623 return 0; 4624 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4625 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4626 return 0; 4627 break; 4628 case AF_INET6: 4629 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4630 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4631 return 0; 4632 /* 4633 * scope_id check. if sin6_scope_id is 0, we regard it 4634 * as a wildcard scope, which matches any scope zone ID. 4635 */ 4636 if (spidx0->src.sin6.sin6_scope_id && 4637 spidx1->src.sin6.sin6_scope_id && 4638 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4639 return 0; 4640 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4641 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4642 return 0; 4643 break; 4644 default: 4645 /* XXX */ 4646 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4647 return 0; 4648 break; 4649 } 4650 4651 switch (spidx0->dst.sa.sa_family) { 4652 case AF_INET: 4653 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4654 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4655 return 0; 4656 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4657 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4658 return 0; 4659 break; 4660 case AF_INET6: 4661 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4662 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4663 return 0; 4664 /* 4665 * scope_id check. if sin6_scope_id is 0, we regard it 4666 * as a wildcard scope, which matches any scope zone ID. 4667 */ 4668 if (spidx0->src.sin6.sin6_scope_id && 4669 spidx1->src.sin6.sin6_scope_id && 4670 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4671 return 0; 4672 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4673 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4674 return 0; 4675 break; 4676 default: 4677 /* XXX */ 4678 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4679 return 0; 4680 break; 4681 } 4682 4683 /* XXX Do we check other field ? e.g. flowinfo */ 4684 4685 return 1; 4686 } 4687 4688 /* returns 0 on match */ 4689 static int 4690 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4691 { 4692 switch (howport) { 4693 case PORT_NONE: 4694 return 0; 4695 case PORT_LOOSE: 4696 if (port1 == 0 || port2 == 0) 4697 return 0; 4698 /*FALLTHROUGH*/ 4699 case PORT_STRICT: 4700 if (port1 != port2) { 4701 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4702 "port fail %d != %d\n", port1, port2); 4703 return 1; 4704 } 4705 return 0; 4706 default: 4707 KASSERT(0); 4708 return 1; 4709 } 4710 } 4711 4712 /* returns 1 on match */ 4713 static int 4714 key_sockaddr_match( 4715 const struct sockaddr *sa1, 4716 const struct sockaddr *sa2, 4717 int howport) 4718 { 4719 const struct sockaddr_in *sin1, *sin2; 4720 const struct sockaddr_in6 *sin61, *sin62; 4721 char s1[IPSEC_ADDRSTRLEN], s2[IPSEC_ADDRSTRLEN]; 4722 4723 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4724 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4725 "fam/len fail %d != %d || %d != %d\n", 4726 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4727 sa2->sa_len); 4728 return 0; 4729 } 4730 4731 switch (sa1->sa_family) { 4732 case AF_INET: 4733 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4734 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4735 "len fail %d != %zu\n", 4736 sa1->sa_len, sizeof(struct sockaddr_in)); 4737 return 0; 4738 } 4739 sin1 = (const struct sockaddr_in *)sa1; 4740 sin2 = (const struct sockaddr_in *)sa2; 4741 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4742 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4743 "addr fail %s != %s\n", 4744 (in_print(s1, sizeof(s1), &sin1->sin_addr), s1), 4745 (in_print(s2, sizeof(s2), &sin2->sin_addr), s2)); 4746 return 0; 4747 } 4748 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4749 return 0; 4750 } 4751 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4752 "addr success %s[%d] == %s[%d]\n", 4753 (in_print(s1, sizeof(s1), &sin1->sin_addr), s1), 4754 sin1->sin_port, 4755 (in_print(s2, sizeof(s2), &sin2->sin_addr), s2), 4756 sin2->sin_port); 4757 break; 4758 case AF_INET6: 4759 sin61 = (const struct sockaddr_in6 *)sa1; 4760 sin62 = (const struct sockaddr_in6 *)sa2; 4761 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4762 return 0; /*EINVAL*/ 4763 4764 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4765 return 0; 4766 } 4767 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4768 return 0; 4769 } 4770 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4771 return 0; 4772 } 4773 break; 4774 default: 4775 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4776 return 0; 4777 break; 4778 } 4779 4780 return 1; 4781 } 4782 4783 /* 4784 * compare two buffers with mask. 4785 * IN: 4786 * addr1: source 4787 * addr2: object 4788 * bits: Number of bits to compare 4789 * OUT: 4790 * 1 : equal 4791 * 0 : not equal 4792 */ 4793 static int 4794 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4795 { 4796 const unsigned char *p1 = a1; 4797 const unsigned char *p2 = a2; 4798 4799 /* XXX: This could be considerably faster if we compare a word 4800 * at a time, but it is complicated on LSB Endian machines */ 4801 4802 /* Handle null pointers */ 4803 if (p1 == NULL || p2 == NULL) 4804 return (p1 == p2); 4805 4806 while (bits >= 8) { 4807 if (*p1++ != *p2++) 4808 return 0; 4809 bits -= 8; 4810 } 4811 4812 if (bits > 0) { 4813 u_int8_t mask = ~((1<<(8-bits))-1); 4814 if ((*p1 & mask) != (*p2 & mask)) 4815 return 0; 4816 } 4817 return 1; /* Match! */ 4818 } 4819 4820 static void 4821 key_timehandler_spd(time_t now) 4822 { 4823 u_int dir; 4824 struct secpolicy *sp; 4825 4826 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4827 retry: 4828 mutex_enter(&key_spd.lock); 4829 SPLIST_WRITER_FOREACH(sp, dir) { 4830 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 4831 4832 if (sp->lifetime == 0 && sp->validtime == 0) 4833 continue; 4834 4835 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4836 (sp->validtime && now - sp->lastused > sp->validtime)) { 4837 key_unlink_sp(sp); 4838 mutex_exit(&key_spd.lock); 4839 key_spdexpire(sp); 4840 key_destroy_sp(sp); 4841 goto retry; 4842 } 4843 } 4844 mutex_exit(&key_spd.lock); 4845 } 4846 4847 retry_socksplist: 4848 mutex_enter(&key_spd.lock); 4849 SOCKSPLIST_WRITER_FOREACH(sp) { 4850 if (sp->state != IPSEC_SPSTATE_DEAD) 4851 continue; 4852 4853 key_unlink_sp(sp); 4854 mutex_exit(&key_spd.lock); 4855 key_destroy_sp(sp); 4856 goto retry_socksplist; 4857 } 4858 mutex_exit(&key_spd.lock); 4859 } 4860 4861 static void 4862 key_timehandler_sad(time_t now) 4863 { 4864 struct secashead *sah; 4865 int s; 4866 4867 restart: 4868 mutex_enter(&key_sad.lock); 4869 SAHLIST_WRITER_FOREACH(sah) { 4870 /* If sah has been dead and has no sav, then delete it */ 4871 if (sah->state == SADB_SASTATE_DEAD && 4872 !key_sah_has_sav(sah)) { 4873 key_unlink_sah(sah); 4874 mutex_exit(&key_sad.lock); 4875 key_destroy_sah(sah); 4876 goto restart; 4877 } 4878 } 4879 mutex_exit(&key_sad.lock); 4880 4881 s = pserialize_read_enter(); 4882 SAHLIST_READER_FOREACH(sah) { 4883 struct secasvar *sav; 4884 4885 key_sah_ref(sah); 4886 pserialize_read_exit(s); 4887 4888 /* if LARVAL entry doesn't become MATURE, delete it. */ 4889 mutex_enter(&key_sad.lock); 4890 restart_sav_LARVAL: 4891 SAVLIST_WRITER_FOREACH(sav, sah, SADB_SASTATE_LARVAL) { 4892 if (now - sav->created > key_larval_lifetime) { 4893 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4894 goto restart_sav_LARVAL; 4895 } 4896 } 4897 mutex_exit(&key_sad.lock); 4898 4899 /* 4900 * check MATURE entry to start to send expire message 4901 * whether or not. 4902 */ 4903 restart_sav_MATURE: 4904 mutex_enter(&key_sad.lock); 4905 SAVLIST_WRITER_FOREACH(sav, sah, SADB_SASTATE_MATURE) { 4906 /* we don't need to check. */ 4907 if (sav->lft_s == NULL) 4908 continue; 4909 4910 /* sanity check */ 4911 KASSERT(sav->lft_c != NULL); 4912 4913 /* check SOFT lifetime */ 4914 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4915 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4916 /* 4917 * check SA to be used whether or not. 4918 * when SA hasn't been used, delete it. 4919 */ 4920 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4921 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4922 mutex_exit(&key_sad.lock); 4923 } else { 4924 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4925 mutex_exit(&key_sad.lock); 4926 /* 4927 * XXX If we keep to send expire 4928 * message in the status of 4929 * DYING. Do remove below code. 4930 */ 4931 key_expire(sav); 4932 } 4933 goto restart_sav_MATURE; 4934 } 4935 /* check SOFT lifetime by bytes */ 4936 /* 4937 * XXX I don't know the way to delete this SA 4938 * when new SA is installed. Caution when it's 4939 * installed too big lifetime by time. 4940 */ 4941 else { 4942 uint64_t lft_c_bytes = 0; 4943 lifetime_counters_t sum = {0}; 4944 4945 percpu_foreach(sav->lft_c_counters_percpu, 4946 key_sum_lifetime_counters, sum); 4947 lft_c_bytes = sum[LIFETIME_COUNTER_BYTES]; 4948 4949 if (sav->lft_s->sadb_lifetime_bytes == 0 || 4950 sav->lft_s->sadb_lifetime_bytes >= lft_c_bytes) 4951 continue; 4952 4953 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4954 mutex_exit(&key_sad.lock); 4955 /* 4956 * XXX If we keep to send expire 4957 * message in the status of 4958 * DYING. Do remove below code. 4959 */ 4960 key_expire(sav); 4961 goto restart_sav_MATURE; 4962 } 4963 } 4964 mutex_exit(&key_sad.lock); 4965 4966 /* check DYING entry to change status to DEAD. */ 4967 mutex_enter(&key_sad.lock); 4968 restart_sav_DYING: 4969 SAVLIST_WRITER_FOREACH(sav, sah, SADB_SASTATE_DYING) { 4970 /* we don't need to check. */ 4971 if (sav->lft_h == NULL) 4972 continue; 4973 4974 /* sanity check */ 4975 KASSERT(sav->lft_c != NULL); 4976 4977 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4978 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4979 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4980 goto restart_sav_DYING; 4981 } 4982 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4983 else if (sav->lft_s != NULL 4984 && sav->lft_s->sadb_lifetime_addtime != 0 4985 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4986 /* 4987 * XXX: should be checked to be 4988 * installed the valid SA. 4989 */ 4990 4991 /* 4992 * If there is no SA then sending 4993 * expire message. 4994 */ 4995 key_expire(sav); 4996 } 4997 #endif 4998 /* check HARD lifetime by bytes */ 4999 else { 5000 uint64_t lft_c_bytes = 0; 5001 lifetime_counters_t sum = {0}; 5002 5003 percpu_foreach(sav->lft_c_counters_percpu, 5004 key_sum_lifetime_counters, sum); 5005 lft_c_bytes = sum[LIFETIME_COUNTER_BYTES]; 5006 5007 if (sav->lft_h->sadb_lifetime_bytes == 0 || 5008 sav->lft_h->sadb_lifetime_bytes >= lft_c_bytes) 5009 continue; 5010 5011 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5012 goto restart_sav_DYING; 5013 } 5014 } 5015 mutex_exit(&key_sad.lock); 5016 5017 /* delete entry in DEAD */ 5018 restart_sav_DEAD: 5019 mutex_enter(&key_sad.lock); 5020 SAVLIST_WRITER_FOREACH(sav, sah, SADB_SASTATE_DEAD) { 5021 key_unlink_sav(sav); 5022 mutex_exit(&key_sad.lock); 5023 key_destroy_sav(sav); 5024 goto restart_sav_DEAD; 5025 } 5026 mutex_exit(&key_sad.lock); 5027 5028 s = pserialize_read_enter(); 5029 key_sah_unref(sah); 5030 } 5031 pserialize_read_exit(s); 5032 } 5033 5034 static void 5035 key_timehandler_acq(time_t now) 5036 { 5037 #ifndef IPSEC_NONBLOCK_ACQUIRE 5038 struct secacq *acq, *nextacq; 5039 5040 restart: 5041 mutex_enter(&key_misc.lock); 5042 LIST_FOREACH_SAFE(acq, &key_misc.acqlist, chain, nextacq) { 5043 if (now - acq->created > key_blockacq_lifetime) { 5044 LIST_REMOVE(acq, chain); 5045 mutex_exit(&key_misc.lock); 5046 kmem_free(acq, sizeof(*acq)); 5047 goto restart; 5048 } 5049 } 5050 mutex_exit(&key_misc.lock); 5051 #endif 5052 } 5053 5054 static void 5055 key_timehandler_spacq(time_t now) 5056 { 5057 #ifdef notyet 5058 struct secspacq *acq, *nextacq; 5059 5060 LIST_FOREACH_SAFE(acq, &key_misc.spacqlist, chain, nextacq) { 5061 if (now - acq->created > key_blockacq_lifetime) { 5062 KASSERT(__LIST_CHAINED(acq)); 5063 LIST_REMOVE(acq, chain); 5064 kmem_free(acq, sizeof(*acq)); 5065 } 5066 } 5067 #endif 5068 } 5069 5070 static unsigned int key_timehandler_work_enqueued = 0; 5071 5072 /* 5073 * time handler. 5074 * scanning SPD and SAD to check status for each entries, 5075 * and do to remove or to expire. 5076 */ 5077 static void 5078 key_timehandler_work(struct work *wk, void *arg) 5079 { 5080 time_t now = time_uptime; 5081 5082 /* We can allow enqueuing another work at this point */ 5083 atomic_swap_uint(&key_timehandler_work_enqueued, 0); 5084 5085 key_timehandler_spd(now); 5086 key_timehandler_sad(now); 5087 key_timehandler_acq(now); 5088 key_timehandler_spacq(now); 5089 5090 key_acquire_sendup_pending_mbuf(); 5091 5092 /* do exchange to tick time !! */ 5093 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 5094 5095 return; 5096 } 5097 5098 static void 5099 key_timehandler(void *arg) 5100 { 5101 5102 /* Avoid enqueuing another work when one is already enqueued */ 5103 if (atomic_swap_uint(&key_timehandler_work_enqueued, 1) == 1) 5104 return; 5105 5106 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 5107 } 5108 5109 u_long 5110 key_random(void) 5111 { 5112 u_long value; 5113 5114 key_randomfill(&value, sizeof(value)); 5115 return value; 5116 } 5117 5118 void 5119 key_randomfill(void *p, size_t l) 5120 { 5121 5122 cprng_fast(p, l); 5123 } 5124 5125 /* 5126 * map SADB_SATYPE_* to IPPROTO_*. 5127 * if satype == SADB_SATYPE then satype is mapped to ~0. 5128 * OUT: 5129 * 0: invalid satype. 5130 */ 5131 static u_int16_t 5132 key_satype2proto(u_int8_t satype) 5133 { 5134 switch (satype) { 5135 case SADB_SATYPE_UNSPEC: 5136 return IPSEC_PROTO_ANY; 5137 case SADB_SATYPE_AH: 5138 return IPPROTO_AH; 5139 case SADB_SATYPE_ESP: 5140 return IPPROTO_ESP; 5141 case SADB_X_SATYPE_IPCOMP: 5142 return IPPROTO_IPCOMP; 5143 case SADB_X_SATYPE_TCPSIGNATURE: 5144 return IPPROTO_TCP; 5145 default: 5146 return 0; 5147 } 5148 /* NOTREACHED */ 5149 } 5150 5151 /* 5152 * map IPPROTO_* to SADB_SATYPE_* 5153 * OUT: 5154 * 0: invalid protocol type. 5155 */ 5156 static u_int8_t 5157 key_proto2satype(u_int16_t proto) 5158 { 5159 switch (proto) { 5160 case IPPROTO_AH: 5161 return SADB_SATYPE_AH; 5162 case IPPROTO_ESP: 5163 return SADB_SATYPE_ESP; 5164 case IPPROTO_IPCOMP: 5165 return SADB_X_SATYPE_IPCOMP; 5166 case IPPROTO_TCP: 5167 return SADB_X_SATYPE_TCPSIGNATURE; 5168 default: 5169 return 0; 5170 } 5171 /* NOTREACHED */ 5172 } 5173 5174 static int 5175 key_setsecasidx(int proto, int mode, int reqid, 5176 const struct sockaddr *src, const struct sockaddr *dst, 5177 struct secasindex * saidx) 5178 { 5179 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 5180 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 5181 5182 /* sa len safety check */ 5183 if (key_checksalen(src_u) != 0) 5184 return -1; 5185 if (key_checksalen(dst_u) != 0) 5186 return -1; 5187 5188 memset(saidx, 0, sizeof(*saidx)); 5189 saidx->proto = proto; 5190 saidx->mode = mode; 5191 saidx->reqid = reqid; 5192 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 5193 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 5194 5195 key_porttosaddr(&((saidx)->src), 0); 5196 key_porttosaddr(&((saidx)->dst), 0); 5197 return 0; 5198 } 5199 5200 static void 5201 key_init_spidx_bymsghdr(struct secpolicyindex *spidx, 5202 const struct sadb_msghdr *mhp) 5203 { 5204 const struct sadb_address *src0, *dst0; 5205 const struct sockaddr *src, *dst; 5206 const struct sadb_x_policy *xpl0; 5207 5208 src0 = mhp->ext[SADB_EXT_ADDRESS_SRC]; 5209 dst0 = mhp->ext[SADB_EXT_ADDRESS_DST]; 5210 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5211 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5212 xpl0 = mhp->ext[SADB_X_EXT_POLICY]; 5213 5214 memset(spidx, 0, sizeof(*spidx)); 5215 spidx->dir = xpl0->sadb_x_policy_dir; 5216 spidx->prefs = src0->sadb_address_prefixlen; 5217 spidx->prefd = dst0->sadb_address_prefixlen; 5218 spidx->ul_proto = src0->sadb_address_proto; 5219 /* XXX boundary check against sa_len */ 5220 memcpy(&spidx->src, src, src->sa_len); 5221 memcpy(&spidx->dst, dst, dst->sa_len); 5222 } 5223 5224 /* %%% PF_KEY */ 5225 /* 5226 * SADB_GETSPI processing is to receive 5227 * <base, (SA2), src address, dst address, (SPI range)> 5228 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 5229 * tree with the status of LARVAL, and send 5230 * <base, SA(*), address(SD)> 5231 * to the IKMPd. 5232 * 5233 * IN: mhp: pointer to the pointer to each header. 5234 * OUT: NULL if fail. 5235 * other if success, return pointer to the message to send. 5236 */ 5237 static int 5238 key_api_getspi(struct socket *so, struct mbuf *m, 5239 const struct sadb_msghdr *mhp) 5240 { 5241 const struct sockaddr *src, *dst; 5242 struct secasindex saidx; 5243 struct secashead *sah; 5244 struct secasvar *newsav; 5245 u_int8_t proto; 5246 u_int32_t spi; 5247 u_int8_t mode; 5248 u_int16_t reqid; 5249 int error; 5250 5251 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5252 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5253 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5254 return key_senderror(so, m, EINVAL); 5255 } 5256 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5257 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5258 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5259 return key_senderror(so, m, EINVAL); 5260 } 5261 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5262 const struct sadb_x_sa2 *sa2 = mhp->ext[SADB_X_EXT_SA2]; 5263 mode = sa2->sadb_x_sa2_mode; 5264 reqid = sa2->sadb_x_sa2_reqid; 5265 } else { 5266 mode = IPSEC_MODE_ANY; 5267 reqid = 0; 5268 } 5269 5270 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5271 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5272 5273 /* map satype to proto */ 5274 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5275 if (proto == 0) { 5276 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5277 return key_senderror(so, m, EINVAL); 5278 } 5279 5280 5281 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5282 if (error != 0) 5283 return key_senderror(so, m, EINVAL); 5284 5285 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5286 if (error != 0) 5287 return key_senderror(so, m, EINVAL); 5288 5289 /* SPI allocation */ 5290 spi = key_do_getnewspi(mhp->ext[SADB_EXT_SPIRANGE], &saidx); 5291 if (spi == 0) 5292 return key_senderror(so, m, EINVAL); 5293 5294 /* get a SA index */ 5295 sah = key_getsah_ref(&saidx, CMP_REQID); 5296 if (sah == NULL) { 5297 /* create a new SA index */ 5298 sah = key_newsah(&saidx); 5299 if (sah == NULL) { 5300 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5301 return key_senderror(so, m, ENOBUFS); 5302 } 5303 } 5304 5305 /* get a new SA */ 5306 /* XXX rewrite */ 5307 newsav = KEY_NEWSAV(m, mhp, &error); 5308 if (newsav == NULL) { 5309 key_sah_unref(sah); 5310 /* XXX don't free new SA index allocated in above. */ 5311 return key_senderror(so, m, error); 5312 } 5313 5314 /* set spi */ 5315 newsav->spi = htonl(spi); 5316 5317 /* Add to sah#savlist */ 5318 key_init_sav(newsav); 5319 newsav->sah = sah; 5320 newsav->state = SADB_SASTATE_LARVAL; 5321 mutex_enter(&key_sad.lock); 5322 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_LARVAL, newsav); 5323 mutex_exit(&key_sad.lock); 5324 key_validate_savlist(sah, SADB_SASTATE_LARVAL); 5325 5326 key_sah_unref(sah); 5327 5328 #ifndef IPSEC_NONBLOCK_ACQUIRE 5329 /* delete the entry in key_misc.acqlist */ 5330 if (mhp->msg->sadb_msg_seq != 0) { 5331 struct secacq *acq; 5332 mutex_enter(&key_misc.lock); 5333 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 5334 if (acq != NULL) { 5335 /* reset counter in order to deletion by timehandler. */ 5336 acq->created = time_uptime; 5337 acq->count = 0; 5338 } 5339 mutex_exit(&key_misc.lock); 5340 } 5341 #endif 5342 5343 { 5344 struct mbuf *n, *nn; 5345 struct sadb_sa *m_sa; 5346 int off, len; 5347 5348 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5349 PFKEY_ALIGN8(sizeof(struct sadb_sa)) <= MCLBYTES); 5350 5351 /* create new sadb_msg to reply. */ 5352 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5353 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5354 5355 n = key_alloc_mbuf_simple(len, M_WAITOK); 5356 n->m_len = len; 5357 n->m_next = NULL; 5358 off = 0; 5359 5360 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 5361 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 5362 5363 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 5364 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 5365 m_sa->sadb_sa_exttype = SADB_EXT_SA; 5366 m_sa->sadb_sa_spi = htonl(spi); 5367 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5368 5369 KASSERTMSG(off == len, "length inconsistency"); 5370 5371 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5372 SADB_EXT_ADDRESS_DST); 5373 5374 KASSERT(n->m_len >= sizeof(struct sadb_msg)); 5375 5376 n->m_pkthdr.len = 0; 5377 for (nn = n; nn; nn = nn->m_next) 5378 n->m_pkthdr.len += nn->m_len; 5379 5380 key_fill_replymsg(n, newsav->seq); 5381 m_freem(m); 5382 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5383 } 5384 } 5385 5386 /* 5387 * allocating new SPI 5388 * called by key_api_getspi(). 5389 * OUT: 5390 * 0: failure. 5391 * others: success. 5392 */ 5393 static u_int32_t 5394 key_do_getnewspi(const struct sadb_spirange *spirange, 5395 const struct secasindex *saidx) 5396 { 5397 u_int32_t newspi; 5398 u_int32_t spmin, spmax; 5399 int count = key_spi_trycnt; 5400 5401 /* set spi range to allocate */ 5402 if (spirange != NULL) { 5403 spmin = spirange->sadb_spirange_min; 5404 spmax = spirange->sadb_spirange_max; 5405 } else { 5406 spmin = key_spi_minval; 5407 spmax = key_spi_maxval; 5408 } 5409 /* IPCOMP needs 2-byte SPI */ 5410 if (saidx->proto == IPPROTO_IPCOMP) { 5411 u_int32_t t; 5412 if (spmin >= 0x10000) 5413 spmin = 0xffff; 5414 if (spmax >= 0x10000) 5415 spmax = 0xffff; 5416 if (spmin > spmax) { 5417 t = spmin; spmin = spmax; spmax = t; 5418 } 5419 } 5420 5421 if (spmin == spmax) { 5422 if (key_checkspidup(saidx, htonl(spmin))) { 5423 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 5424 return 0; 5425 } 5426 5427 count--; /* taking one cost. */ 5428 newspi = spmin; 5429 5430 } else { 5431 5432 /* init SPI */ 5433 newspi = 0; 5434 5435 /* when requesting to allocate spi ranged */ 5436 while (count--) { 5437 /* generate pseudo-random SPI value ranged. */ 5438 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5439 5440 if (!key_checkspidup(saidx, htonl(newspi))) 5441 break; 5442 } 5443 5444 if (count == 0 || newspi == 0) { 5445 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5446 return 0; 5447 } 5448 } 5449 5450 /* statistics */ 5451 keystat.getspi_count = 5452 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5453 5454 return newspi; 5455 } 5456 5457 static int 5458 key_handle_natt_info(struct secasvar *sav, 5459 const struct sadb_msghdr *mhp) 5460 { 5461 const char *msg = "?" ; 5462 struct sadb_x_nat_t_type *type; 5463 struct sadb_x_nat_t_port *sport, *dport; 5464 struct sadb_address *iaddr, *raddr; 5465 struct sadb_x_nat_t_frag *frag; 5466 5467 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5468 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5469 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5470 return 0; 5471 5472 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5473 msg = "TYPE"; 5474 goto bad; 5475 } 5476 5477 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5478 msg = "SPORT"; 5479 goto bad; 5480 } 5481 5482 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5483 msg = "DPORT"; 5484 goto bad; 5485 } 5486 5487 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5488 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5489 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5490 msg = "OAI"; 5491 goto bad; 5492 } 5493 } 5494 5495 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5496 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5497 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5498 msg = "OAR"; 5499 goto bad; 5500 } 5501 } 5502 5503 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5504 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5505 msg = "FRAG"; 5506 goto bad; 5507 } 5508 } 5509 5510 type = mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5511 sport = mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5512 dport = mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5513 iaddr = mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5514 raddr = mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5515 frag = mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5516 5517 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5518 type->sadb_x_nat_t_type_type, 5519 ntohs(sport->sadb_x_nat_t_port_port), 5520 ntohs(dport->sadb_x_nat_t_port_port)); 5521 5522 sav->natt_type = type->sadb_x_nat_t_type_type; 5523 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5524 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5525 if (frag) 5526 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5527 else 5528 sav->esp_frag = IP_MAXPACKET; 5529 5530 return 0; 5531 bad: 5532 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5533 __USE(msg); 5534 return -1; 5535 } 5536 5537 /* Just update the IPSEC_NAT_T ports if present */ 5538 static int 5539 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5540 const struct sadb_msghdr *mhp) 5541 { 5542 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5543 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5544 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5545 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5546 5547 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5548 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5549 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5550 struct sadb_x_nat_t_type *type; 5551 struct sadb_x_nat_t_port *sport; 5552 struct sadb_x_nat_t_port *dport; 5553 5554 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5555 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5556 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5557 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5558 return -1; 5559 } 5560 5561 type = mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5562 sport = mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5563 dport = mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5564 5565 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5566 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5567 5568 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5569 type->sadb_x_nat_t_type_type, 5570 ntohs(sport->sadb_x_nat_t_port_port), 5571 ntohs(dport->sadb_x_nat_t_port_port)); 5572 } 5573 5574 return 0; 5575 } 5576 5577 5578 /* 5579 * SADB_UPDATE processing 5580 * receive 5581 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5582 * key(AE), (identity(SD),) (sensitivity)> 5583 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5584 * and send 5585 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5586 * (identity(SD),) (sensitivity)> 5587 * to the ikmpd. 5588 * 5589 * m will always be freed. 5590 */ 5591 static int 5592 key_api_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5593 { 5594 struct sadb_sa *sa0; 5595 const struct sockaddr *src, *dst; 5596 struct secasindex saidx; 5597 struct secashead *sah; 5598 struct secasvar *sav, *newsav; 5599 u_int16_t proto; 5600 u_int8_t mode; 5601 u_int16_t reqid; 5602 int error; 5603 5604 /* map satype to proto */ 5605 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5606 if (proto == 0) { 5607 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5608 return key_senderror(so, m, EINVAL); 5609 } 5610 5611 if (mhp->ext[SADB_EXT_SA] == NULL || 5612 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5613 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5614 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5615 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5616 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5617 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5618 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5619 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5620 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5621 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5622 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5623 return key_senderror(so, m, EINVAL); 5624 } 5625 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5626 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5627 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5628 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5629 return key_senderror(so, m, EINVAL); 5630 } 5631 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5632 const struct sadb_x_sa2 *sa2 = mhp->ext[SADB_X_EXT_SA2]; 5633 mode = sa2->sadb_x_sa2_mode; 5634 reqid = sa2->sadb_x_sa2_reqid; 5635 } else { 5636 mode = IPSEC_MODE_ANY; 5637 reqid = 0; 5638 } 5639 /* XXX boundary checking for other extensions */ 5640 5641 sa0 = mhp->ext[SADB_EXT_SA]; 5642 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5643 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5644 5645 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5646 if (error != 0) 5647 return key_senderror(so, m, EINVAL); 5648 5649 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5650 if (error != 0) 5651 return key_senderror(so, m, EINVAL); 5652 5653 /* get a SA header */ 5654 sah = key_getsah_ref(&saidx, CMP_REQID); 5655 if (sah == NULL) { 5656 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5657 return key_senderror(so, m, ENOENT); 5658 } 5659 5660 /* set spidx if there */ 5661 /* XXX rewrite */ 5662 error = key_setident(sah, m, mhp); 5663 if (error) 5664 goto error_sah; 5665 5666 /* find a SA with sequence number. */ 5667 #ifdef IPSEC_DOSEQCHECK 5668 if (mhp->msg->sadb_msg_seq != 0) { 5669 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5670 if (sav == NULL) { 5671 IPSECLOG(LOG_DEBUG, 5672 "no larval SA with sequence %u exists.\n", 5673 mhp->msg->sadb_msg_seq); 5674 error = ENOENT; 5675 goto error_sah; 5676 } 5677 } 5678 #else 5679 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5680 if (sav == NULL) { 5681 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5682 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5683 error = EINVAL; 5684 goto error_sah; 5685 } 5686 #endif 5687 5688 /* validity check */ 5689 if (sav->sah->saidx.proto != proto) { 5690 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5691 sav->sah->saidx.proto, proto); 5692 error = EINVAL; 5693 goto error; 5694 } 5695 #ifdef IPSEC_DOSEQCHECK 5696 if (sav->spi != sa0->sadb_sa_spi) { 5697 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5698 (u_int32_t)ntohl(sav->spi), 5699 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5700 error = EINVAL; 5701 goto error; 5702 } 5703 #endif 5704 if (sav->pid != mhp->msg->sadb_msg_pid) { 5705 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5706 sav->pid, mhp->msg->sadb_msg_pid); 5707 error = EINVAL; 5708 goto error; 5709 } 5710 5711 /* 5712 * Allocate a new SA instead of modifying the existing SA directly 5713 * to avoid race conditions. 5714 */ 5715 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 5716 5717 /* copy sav values */ 5718 newsav->spi = sav->spi; 5719 newsav->seq = sav->seq; 5720 newsav->created = sav->created; 5721 newsav->pid = sav->pid; 5722 newsav->sah = sav->sah; 5723 5724 error = key_setsaval(newsav, m, mhp); 5725 if (error) { 5726 key_delsav(newsav); 5727 goto error; 5728 } 5729 5730 error = key_handle_natt_info(newsav, mhp); 5731 if (error != 0) { 5732 key_delsav(newsav); 5733 goto error; 5734 } 5735 5736 error = key_init_xform(newsav); 5737 if (error != 0) { 5738 key_delsav(newsav); 5739 goto error; 5740 } 5741 5742 /* Add to sah#savlist */ 5743 key_init_sav(newsav); 5744 newsav->state = SADB_SASTATE_MATURE; 5745 mutex_enter(&key_sad.lock); 5746 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_MATURE, newsav); 5747 SAVLUT_WRITER_INSERT_HEAD(newsav); 5748 mutex_exit(&key_sad.lock); 5749 key_validate_savlist(sah, SADB_SASTATE_MATURE); 5750 5751 key_sah_unref(sah); 5752 sah = NULL; 5753 5754 key_destroy_sav_with_ref(sav); 5755 sav = NULL; 5756 5757 { 5758 struct mbuf *n; 5759 5760 /* set msg buf from mhp */ 5761 n = key_getmsgbuf_x1(m, mhp); 5762 if (n == NULL) { 5763 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5764 return key_senderror(so, m, ENOBUFS); 5765 } 5766 5767 m_freem(m); 5768 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5769 } 5770 error: 5771 KEY_SA_UNREF(&sav); 5772 error_sah: 5773 key_sah_unref(sah); 5774 return key_senderror(so, m, error); 5775 } 5776 5777 /* 5778 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5779 * only called by key_api_update(). 5780 * OUT: 5781 * NULL : not found 5782 * others : found, pointer to a SA. 5783 */ 5784 #ifdef IPSEC_DOSEQCHECK 5785 static struct secasvar * 5786 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5787 { 5788 struct secasvar *sav; 5789 u_int state; 5790 int s; 5791 5792 state = SADB_SASTATE_LARVAL; 5793 5794 /* search SAD with sequence number ? */ 5795 s = pserialize_read_enter(); 5796 SAVLIST_READER_FOREACH(sav, sah, state) { 5797 KEY_CHKSASTATE(state, sav->state); 5798 5799 if (sav->seq == seq) { 5800 SA_ADDREF(sav); 5801 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5802 "DP cause refcnt++:%d SA:%p\n", 5803 key_sa_refcnt(sav), sav); 5804 break; 5805 } 5806 } 5807 pserialize_read_exit(s); 5808 5809 return sav; 5810 } 5811 #endif 5812 5813 /* 5814 * SADB_ADD processing 5815 * add an entry to SA database, when received 5816 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5817 * key(AE), (identity(SD),) (sensitivity)> 5818 * from the ikmpd, 5819 * and send 5820 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5821 * (identity(SD),) (sensitivity)> 5822 * to the ikmpd. 5823 * 5824 * IGNORE identity and sensitivity messages. 5825 * 5826 * m will always be freed. 5827 */ 5828 static int 5829 key_api_add(struct socket *so, struct mbuf *m, 5830 const struct sadb_msghdr *mhp) 5831 { 5832 struct sadb_sa *sa0; 5833 const struct sockaddr *src, *dst; 5834 struct secasindex saidx; 5835 struct secashead *sah; 5836 struct secasvar *newsav; 5837 u_int16_t proto; 5838 u_int8_t mode; 5839 u_int16_t reqid; 5840 int error; 5841 5842 /* map satype to proto */ 5843 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5844 if (proto == 0) { 5845 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5846 return key_senderror(so, m, EINVAL); 5847 } 5848 5849 if (mhp->ext[SADB_EXT_SA] == NULL || 5850 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5851 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5852 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5853 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5854 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5855 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5856 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5857 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5858 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5859 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5860 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5861 return key_senderror(so, m, EINVAL); 5862 } 5863 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5864 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5865 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5866 /* XXX need more */ 5867 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5868 return key_senderror(so, m, EINVAL); 5869 } 5870 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5871 const struct sadb_x_sa2 *sa2 = mhp->ext[SADB_X_EXT_SA2]; 5872 mode = sa2->sadb_x_sa2_mode; 5873 reqid = sa2->sadb_x_sa2_reqid; 5874 } else { 5875 mode = IPSEC_MODE_ANY; 5876 reqid = 0; 5877 } 5878 5879 sa0 = mhp->ext[SADB_EXT_SA]; 5880 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5881 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5882 5883 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5884 if (error != 0) 5885 return key_senderror(so, m, EINVAL); 5886 5887 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5888 if (error != 0) 5889 return key_senderror(so, m, EINVAL); 5890 5891 /* get a SA header */ 5892 sah = key_getsah_ref(&saidx, CMP_REQID); 5893 if (sah == NULL) { 5894 /* create a new SA header */ 5895 sah = key_newsah(&saidx); 5896 if (sah == NULL) { 5897 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5898 return key_senderror(so, m, ENOBUFS); 5899 } 5900 } 5901 5902 /* set spidx if there */ 5903 /* XXX rewrite */ 5904 error = key_setident(sah, m, mhp); 5905 if (error) 5906 goto error; 5907 5908 { 5909 struct secasvar *sav; 5910 5911 /* We can create new SA only if SPI is differenct. */ 5912 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5913 if (sav != NULL) { 5914 KEY_SA_UNREF(&sav); 5915 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5916 error = EEXIST; 5917 goto error; 5918 } 5919 } 5920 5921 /* create new SA entry. */ 5922 newsav = KEY_NEWSAV(m, mhp, &error); 5923 if (newsav == NULL) 5924 goto error; 5925 newsav->sah = sah; 5926 5927 error = key_handle_natt_info(newsav, mhp); 5928 if (error != 0) { 5929 key_delsav(newsav); 5930 error = EINVAL; 5931 goto error; 5932 } 5933 5934 error = key_init_xform(newsav); 5935 if (error != 0) { 5936 key_delsav(newsav); 5937 goto error; 5938 } 5939 5940 /* Add to sah#savlist */ 5941 key_init_sav(newsav); 5942 newsav->state = SADB_SASTATE_MATURE; 5943 mutex_enter(&key_sad.lock); 5944 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_MATURE, newsav); 5945 SAVLUT_WRITER_INSERT_HEAD(newsav); 5946 mutex_exit(&key_sad.lock); 5947 key_validate_savlist(sah, SADB_SASTATE_MATURE); 5948 5949 key_sah_unref(sah); 5950 sah = NULL; 5951 5952 /* 5953 * don't call key_freesav() here, as we would like to keep the SA 5954 * in the database on success. 5955 */ 5956 5957 { 5958 struct mbuf *n; 5959 5960 /* set msg buf from mhp */ 5961 n = key_getmsgbuf_x1(m, mhp); 5962 if (n == NULL) { 5963 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5964 return key_senderror(so, m, ENOBUFS); 5965 } 5966 5967 m_freem(m); 5968 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5969 } 5970 error: 5971 key_sah_unref(sah); 5972 return key_senderror(so, m, error); 5973 } 5974 5975 /* m is retained */ 5976 static int 5977 key_setident(struct secashead *sah, struct mbuf *m, 5978 const struct sadb_msghdr *mhp) 5979 { 5980 const struct sadb_ident *idsrc, *iddst; 5981 int idsrclen, iddstlen; 5982 5983 KASSERT(!cpu_softintr_p()); 5984 KASSERT(sah != NULL); 5985 KASSERT(m != NULL); 5986 KASSERT(mhp != NULL); 5987 KASSERT(mhp->msg != NULL); 5988 5989 /* 5990 * Can be called with an existing sah from key_api_update(). 5991 */ 5992 if (sah->idents != NULL) { 5993 kmem_free(sah->idents, sah->idents_len); 5994 sah->idents = NULL; 5995 sah->idents_len = 0; 5996 } 5997 if (sah->identd != NULL) { 5998 kmem_free(sah->identd, sah->identd_len); 5999 sah->identd = NULL; 6000 sah->identd_len = 0; 6001 } 6002 6003 /* don't make buffer if not there */ 6004 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 6005 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 6006 sah->idents = NULL; 6007 sah->identd = NULL; 6008 return 0; 6009 } 6010 6011 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 6012 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 6013 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 6014 return EINVAL; 6015 } 6016 6017 idsrc = mhp->ext[SADB_EXT_IDENTITY_SRC]; 6018 iddst = mhp->ext[SADB_EXT_IDENTITY_DST]; 6019 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 6020 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 6021 6022 /* validity check */ 6023 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 6024 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 6025 return EINVAL; 6026 } 6027 6028 switch (idsrc->sadb_ident_type) { 6029 case SADB_IDENTTYPE_PREFIX: 6030 case SADB_IDENTTYPE_FQDN: 6031 case SADB_IDENTTYPE_USERFQDN: 6032 default: 6033 /* XXX do nothing */ 6034 sah->idents = NULL; 6035 sah->identd = NULL; 6036 return 0; 6037 } 6038 6039 /* make structure */ 6040 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 6041 sah->idents_len = idsrclen; 6042 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 6043 sah->identd_len = iddstlen; 6044 memcpy(sah->idents, idsrc, idsrclen); 6045 memcpy(sah->identd, iddst, iddstlen); 6046 6047 return 0; 6048 } 6049 6050 /* 6051 * m will not be freed on return. It never return NULL. 6052 * it is caller's responsibility to free the result. 6053 */ 6054 static struct mbuf * 6055 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 6056 { 6057 struct mbuf *n; 6058 6059 KASSERT(m != NULL); 6060 KASSERT(mhp != NULL); 6061 KASSERT(mhp->msg != NULL); 6062 6063 /* create new sadb_msg to reply. */ 6064 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 6065 SADB_EXT_SA, SADB_X_EXT_SA2, 6066 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 6067 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 6068 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 6069 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 6070 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 6071 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 6072 6073 KASSERT(n->m_len >= sizeof(struct sadb_msg)); 6074 6075 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 6076 mtod(n, struct sadb_msg *)->sadb_msg_len = 6077 PFKEY_UNIT64(n->m_pkthdr.len); 6078 6079 return n; 6080 } 6081 6082 static int key_delete_all (struct socket *, struct mbuf *, 6083 const struct sadb_msghdr *, u_int16_t); 6084 6085 /* 6086 * SADB_DELETE processing 6087 * receive 6088 * <base, SA(*), address(SD)> 6089 * from the ikmpd, and set SADB_SASTATE_DEAD, 6090 * and send, 6091 * <base, SA(*), address(SD)> 6092 * to the ikmpd. 6093 * 6094 * m will always be freed. 6095 */ 6096 static int 6097 key_api_delete(struct socket *so, struct mbuf *m, 6098 const struct sadb_msghdr *mhp) 6099 { 6100 struct sadb_sa *sa0; 6101 const struct sockaddr *src, *dst; 6102 struct secasindex saidx; 6103 struct secashead *sah; 6104 struct secasvar *sav = NULL; 6105 u_int16_t proto; 6106 int error; 6107 6108 /* map satype to proto */ 6109 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6110 if (proto == 0) { 6111 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6112 return key_senderror(so, m, EINVAL); 6113 } 6114 6115 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6116 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 6117 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6118 return key_senderror(so, m, EINVAL); 6119 } 6120 6121 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6122 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 6123 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6124 return key_senderror(so, m, EINVAL); 6125 } 6126 6127 if (mhp->ext[SADB_EXT_SA] == NULL) { 6128 /* 6129 * Caller wants us to delete all non-LARVAL SAs 6130 * that match the src/dst. This is used during 6131 * IKE INITIAL-CONTACT. 6132 */ 6133 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 6134 return key_delete_all(so, m, mhp, proto); 6135 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 6136 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6137 return key_senderror(so, m, EINVAL); 6138 } 6139 6140 sa0 = mhp->ext[SADB_EXT_SA]; 6141 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6142 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6143 6144 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6145 if (error != 0) 6146 return key_senderror(so, m, EINVAL); 6147 6148 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6149 if (error != 0) 6150 return key_senderror(so, m, EINVAL); 6151 6152 /* get a SA header */ 6153 sah = key_getsah_ref(&saidx, CMP_HEAD); 6154 if (sah != NULL) { 6155 /* get a SA with SPI. */ 6156 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 6157 key_sah_unref(sah); 6158 } 6159 6160 if (sav == NULL) { 6161 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 6162 return key_senderror(so, m, ENOENT); 6163 } 6164 6165 key_destroy_sav_with_ref(sav); 6166 sav = NULL; 6167 6168 { 6169 struct mbuf *n; 6170 6171 /* create new sadb_msg to reply. */ 6172 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 6173 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 6174 6175 key_fill_replymsg(n, 0); 6176 m_freem(m); 6177 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 6178 } 6179 } 6180 6181 /* 6182 * delete all SAs for src/dst. Called from key_api_delete(). 6183 */ 6184 static int 6185 key_delete_all(struct socket *so, struct mbuf *m, 6186 const struct sadb_msghdr *mhp, u_int16_t proto) 6187 { 6188 const struct sockaddr *src, *dst; 6189 struct secasindex saidx; 6190 struct secashead *sah; 6191 struct secasvar *sav; 6192 u_int state; 6193 int error; 6194 6195 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6196 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6197 6198 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6199 if (error != 0) 6200 return key_senderror(so, m, EINVAL); 6201 6202 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6203 if (error != 0) 6204 return key_senderror(so, m, EINVAL); 6205 6206 sah = key_getsah_ref(&saidx, CMP_HEAD); 6207 if (sah != NULL) { 6208 /* Delete all non-LARVAL SAs. */ 6209 SASTATE_ALIVE_FOREACH(state) { 6210 if (state == SADB_SASTATE_LARVAL) 6211 continue; 6212 restart: 6213 mutex_enter(&key_sad.lock); 6214 SAVLIST_WRITER_FOREACH(sav, sah, state) { 6215 sav->state = SADB_SASTATE_DEAD; 6216 key_unlink_sav(sav); 6217 mutex_exit(&key_sad.lock); 6218 key_destroy_sav(sav); 6219 goto restart; 6220 } 6221 mutex_exit(&key_sad.lock); 6222 } 6223 key_sah_unref(sah); 6224 } 6225 { 6226 struct mbuf *n; 6227 6228 /* create new sadb_msg to reply. */ 6229 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 6230 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 6231 6232 key_fill_replymsg(n, 0); 6233 m_freem(m); 6234 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 6235 } 6236 } 6237 6238 /* 6239 * SADB_GET processing 6240 * receive 6241 * <base, SA(*), address(SD)> 6242 * from the ikmpd, and get a SP and a SA to respond, 6243 * and send, 6244 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 6245 * (identity(SD),) (sensitivity)> 6246 * to the ikmpd. 6247 * 6248 * m will always be freed. 6249 */ 6250 static int 6251 key_api_get(struct socket *so, struct mbuf *m, 6252 const struct sadb_msghdr *mhp) 6253 { 6254 struct sadb_sa *sa0; 6255 const struct sockaddr *src, *dst; 6256 struct secasindex saidx; 6257 struct secasvar *sav = NULL; 6258 u_int16_t proto; 6259 int error; 6260 6261 /* map satype to proto */ 6262 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 6263 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6264 return key_senderror(so, m, EINVAL); 6265 } 6266 6267 if (mhp->ext[SADB_EXT_SA] == NULL || 6268 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6269 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 6270 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6271 return key_senderror(so, m, EINVAL); 6272 } 6273 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 6274 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6275 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 6276 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6277 return key_senderror(so, m, EINVAL); 6278 } 6279 6280 sa0 = mhp->ext[SADB_EXT_SA]; 6281 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6282 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6283 6284 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6285 if (error != 0) 6286 return key_senderror(so, m, EINVAL); 6287 6288 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6289 if (error != 0) 6290 return key_senderror(so, m, EINVAL); 6291 6292 /* get a SA header */ 6293 { 6294 struct secashead *sah; 6295 int s = pserialize_read_enter(); 6296 6297 sah = key_getsah(&saidx, CMP_HEAD); 6298 if (sah != NULL) { 6299 /* get a SA with SPI. */ 6300 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 6301 } 6302 pserialize_read_exit(s); 6303 } 6304 if (sav == NULL) { 6305 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 6306 return key_senderror(so, m, ENOENT); 6307 } 6308 6309 { 6310 struct mbuf *n; 6311 u_int8_t satype; 6312 6313 /* map proto to satype */ 6314 satype = key_proto2satype(sav->sah->saidx.proto); 6315 if (satype == 0) { 6316 KEY_SA_UNREF(&sav); 6317 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 6318 return key_senderror(so, m, EINVAL); 6319 } 6320 6321 /* create new sadb_msg to reply. */ 6322 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 6323 mhp->msg->sadb_msg_pid); 6324 KEY_SA_UNREF(&sav); 6325 m_freem(m); 6326 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 6327 } 6328 } 6329 6330 /* XXX make it sysctl-configurable? */ 6331 static void 6332 key_getcomb_setlifetime(struct sadb_comb *comb) 6333 { 6334 6335 comb->sadb_comb_soft_allocations = 1; 6336 comb->sadb_comb_hard_allocations = 1; 6337 comb->sadb_comb_soft_bytes = 0; 6338 comb->sadb_comb_hard_bytes = 0; 6339 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 6340 comb->sadb_comb_soft_addtime = comb->sadb_comb_hard_addtime * 80 / 100; 6341 comb->sadb_comb_hard_usetime = 28800; /* 8 hours */ 6342 comb->sadb_comb_soft_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 6343 } 6344 6345 /* 6346 * XXX reorder combinations by preference 6347 * XXX no idea if the user wants ESP authentication or not 6348 */ 6349 static struct mbuf * 6350 key_getcomb_esp(int mflag) 6351 { 6352 struct sadb_comb *comb; 6353 const struct enc_xform *algo; 6354 struct mbuf *result = NULL, *m, *n; 6355 int encmin; 6356 int i, off, o; 6357 int totlen; 6358 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6359 6360 m = NULL; 6361 for (i = 1; i <= SADB_EALG_MAX; i++) { 6362 algo = esp_algorithm_lookup(i); 6363 if (algo == NULL) 6364 continue; 6365 6366 /* discard algorithms with key size smaller than system min */ 6367 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 6368 continue; 6369 if (_BITS(algo->minkey) < ipsec_esp_keymin) 6370 encmin = ipsec_esp_keymin; 6371 else 6372 encmin = _BITS(algo->minkey); 6373 6374 if (ipsec_esp_auth) 6375 m = key_getcomb_ah(mflag); 6376 else { 6377 KASSERTMSG(l <= MLEN, 6378 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6379 MGET(m, mflag, MT_DATA); 6380 if (m) { 6381 M_ALIGN(m, l); 6382 m->m_len = l; 6383 m->m_next = NULL; 6384 memset(mtod(m, void *), 0, m->m_len); 6385 } 6386 } 6387 if (!m) 6388 goto fail; 6389 6390 totlen = 0; 6391 for (n = m; n; n = n->m_next) 6392 totlen += n->m_len; 6393 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 6394 6395 for (off = 0; off < totlen; off += l) { 6396 n = m_pulldown(m, off, l, &o); 6397 if (!n) { 6398 /* m is already freed */ 6399 goto fail; 6400 } 6401 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6402 memset(comb, 0, sizeof(*comb)); 6403 key_getcomb_setlifetime(comb); 6404 comb->sadb_comb_encrypt = i; 6405 comb->sadb_comb_encrypt_minbits = encmin; 6406 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6407 } 6408 6409 if (!result) 6410 result = m; 6411 else 6412 m_cat(result, m); 6413 } 6414 6415 return result; 6416 6417 fail: 6418 if (result) 6419 m_freem(result); 6420 return NULL; 6421 } 6422 6423 static void 6424 key_getsizes_ah(const struct auth_hash *ah, int alg, 6425 u_int16_t* ksmin, u_int16_t* ksmax) 6426 { 6427 *ksmin = *ksmax = ah->keysize; 6428 if (ah->keysize == 0) { 6429 /* 6430 * Transform takes arbitrary key size but algorithm 6431 * key size is restricted. Enforce this here. 6432 */ 6433 switch (alg) { 6434 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6435 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6436 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6437 default: 6438 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 6439 break; 6440 } 6441 } 6442 } 6443 6444 /* 6445 * XXX reorder combinations by preference 6446 */ 6447 static struct mbuf * 6448 key_getcomb_ah(int mflag) 6449 { 6450 struct sadb_comb *comb; 6451 const struct auth_hash *algo; 6452 struct mbuf *m; 6453 u_int16_t minkeysize, maxkeysize; 6454 int i; 6455 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6456 6457 m = NULL; 6458 for (i = 1; i <= SADB_AALG_MAX; i++) { 6459 #if 1 6460 /* we prefer HMAC algorithms, not old algorithms */ 6461 if (i != SADB_AALG_SHA1HMAC && 6462 i != SADB_AALG_MD5HMAC && 6463 i != SADB_X_AALG_SHA2_256 && 6464 i != SADB_X_AALG_SHA2_384 && 6465 i != SADB_X_AALG_SHA2_512) 6466 continue; 6467 #endif 6468 algo = ah_algorithm_lookup(i); 6469 if (!algo) 6470 continue; 6471 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6472 /* discard algorithms with key size smaller than system min */ 6473 if (_BITS(minkeysize) < ipsec_ah_keymin) 6474 continue; 6475 6476 if (!m) { 6477 KASSERTMSG(l <= MLEN, 6478 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6479 MGET(m, mflag, MT_DATA); 6480 if (m) { 6481 M_ALIGN(m, l); 6482 m->m_len = l; 6483 m->m_next = NULL; 6484 } 6485 } else 6486 M_PREPEND(m, l, mflag); 6487 if (!m) 6488 return NULL; 6489 6490 if (m->m_len < sizeof(struct sadb_comb)) { 6491 m = m_pullup(m, sizeof(struct sadb_comb)); 6492 if (m == NULL) 6493 return NULL; 6494 } 6495 6496 comb = mtod(m, struct sadb_comb *); 6497 memset(comb, 0, sizeof(*comb)); 6498 key_getcomb_setlifetime(comb); 6499 comb->sadb_comb_auth = i; 6500 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6501 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6502 } 6503 6504 return m; 6505 } 6506 6507 /* 6508 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6509 * XXX reorder combinations by preference 6510 */ 6511 static struct mbuf * 6512 key_getcomb_ipcomp(int mflag) 6513 { 6514 struct sadb_comb *comb; 6515 const struct comp_algo *algo; 6516 struct mbuf *m; 6517 int i; 6518 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6519 6520 m = NULL; 6521 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6522 algo = ipcomp_algorithm_lookup(i); 6523 if (!algo) 6524 continue; 6525 6526 if (!m) { 6527 KASSERTMSG(l <= MLEN, 6528 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6529 MGET(m, mflag, MT_DATA); 6530 if (m) { 6531 M_ALIGN(m, l); 6532 m->m_len = l; 6533 m->m_next = NULL; 6534 } 6535 } else 6536 M_PREPEND(m, l, mflag); 6537 if (!m) 6538 return NULL; 6539 6540 if (m->m_len < sizeof(struct sadb_comb)) { 6541 m = m_pullup(m, sizeof(struct sadb_comb)); 6542 if (m == NULL) 6543 return NULL; 6544 } 6545 6546 comb = mtod(m, struct sadb_comb *); 6547 memset(comb, 0, sizeof(*comb)); 6548 key_getcomb_setlifetime(comb); 6549 comb->sadb_comb_encrypt = i; 6550 /* what should we set into sadb_comb_*_{min,max}bits? */ 6551 } 6552 6553 return m; 6554 } 6555 6556 /* 6557 * XXX no way to pass mode (transport/tunnel) to userland 6558 * XXX replay checking? 6559 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6560 */ 6561 static struct mbuf * 6562 key_getprop(const struct secasindex *saidx, int mflag) 6563 { 6564 struct sadb_prop *prop; 6565 struct mbuf *m, *n; 6566 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6567 int totlen; 6568 6569 switch (saidx->proto) { 6570 case IPPROTO_ESP: 6571 m = key_getcomb_esp(mflag); 6572 break; 6573 case IPPROTO_AH: 6574 m = key_getcomb_ah(mflag); 6575 break; 6576 case IPPROTO_IPCOMP: 6577 m = key_getcomb_ipcomp(mflag); 6578 break; 6579 default: 6580 return NULL; 6581 } 6582 6583 if (!m) 6584 return NULL; 6585 M_PREPEND(m, l, mflag); 6586 if (!m) 6587 return NULL; 6588 6589 totlen = 0; 6590 for (n = m; n; n = n->m_next) 6591 totlen += n->m_len; 6592 6593 prop = mtod(m, struct sadb_prop *); 6594 memset(prop, 0, sizeof(*prop)); 6595 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6596 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6597 prop->sadb_prop_replay = 32; /* XXX */ 6598 6599 return m; 6600 } 6601 6602 /* 6603 * SADB_ACQUIRE processing called by key_checkrequest() and key_api_acquire(). 6604 * send 6605 * <base, SA, address(SD), (address(P)), x_policy, 6606 * (identity(SD),) (sensitivity,) proposal> 6607 * to KMD, and expect to receive 6608 * <base> with SADB_ACQUIRE if error occurred, 6609 * or 6610 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6611 * from KMD by PF_KEY. 6612 * 6613 * XXX x_policy is outside of RFC2367 (KAME extension). 6614 * XXX sensitivity is not supported. 6615 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6616 * see comment for key_getcomb_ipcomp(). 6617 * 6618 * OUT: 6619 * 0 : succeed 6620 * others: error number 6621 */ 6622 static int 6623 key_acquire(const struct secasindex *saidx, const struct secpolicy *sp, int mflag) 6624 { 6625 struct mbuf *result = NULL, *m; 6626 #ifndef IPSEC_NONBLOCK_ACQUIRE 6627 struct secacq *newacq; 6628 #endif 6629 u_int8_t satype; 6630 int error = -1; 6631 u_int32_t seq; 6632 6633 /* sanity check */ 6634 KASSERT(saidx != NULL); 6635 satype = key_proto2satype(saidx->proto); 6636 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6637 6638 #ifndef IPSEC_NONBLOCK_ACQUIRE 6639 /* 6640 * We never do anything about acquirng SA. There is anather 6641 * solution that kernel blocks to send SADB_ACQUIRE message until 6642 * getting something message from IKEd. In later case, to be 6643 * managed with ACQUIRING list. 6644 */ 6645 /* Get an entry to check whether sending message or not. */ 6646 mutex_enter(&key_misc.lock); 6647 newacq = key_getacq(saidx); 6648 if (newacq != NULL) { 6649 if (key_blockacq_count < newacq->count) { 6650 /* reset counter and do send message. */ 6651 newacq->count = 0; 6652 } else { 6653 /* increment counter and do nothing. */ 6654 newacq->count++; 6655 mutex_exit(&key_misc.lock); 6656 return 0; 6657 } 6658 } else { 6659 /* make new entry for blocking to send SADB_ACQUIRE. */ 6660 newacq = key_newacq(saidx); 6661 if (newacq == NULL) { 6662 mutex_exit(&key_misc.lock); 6663 return ENOBUFS; 6664 } 6665 6666 /* add to key_misc.acqlist */ 6667 LIST_INSERT_HEAD(&key_misc.acqlist, newacq, chain); 6668 } 6669 6670 seq = newacq->seq; 6671 mutex_exit(&key_misc.lock); 6672 #else 6673 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6674 #endif 6675 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0, mflag); 6676 if (!m) { 6677 error = ENOBUFS; 6678 goto fail; 6679 } 6680 result = m; 6681 6682 /* set sadb_address for saidx's. */ 6683 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6684 IPSEC_ULPROTO_ANY, mflag); 6685 if (!m) { 6686 error = ENOBUFS; 6687 goto fail; 6688 } 6689 m_cat(result, m); 6690 6691 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6692 IPSEC_ULPROTO_ANY, mflag); 6693 if (!m) { 6694 error = ENOBUFS; 6695 goto fail; 6696 } 6697 m_cat(result, m); 6698 6699 /* XXX proxy address (optional) */ 6700 6701 /* set sadb_x_policy */ 6702 if (sp) { 6703 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id, 6704 mflag); 6705 if (!m) { 6706 error = ENOBUFS; 6707 goto fail; 6708 } 6709 m_cat(result, m); 6710 } 6711 6712 /* XXX identity (optional) */ 6713 #if 0 6714 if (idexttype && fqdn) { 6715 /* create identity extension (FQDN) */ 6716 struct sadb_ident *id; 6717 int fqdnlen; 6718 6719 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6720 id = (struct sadb_ident *)p; 6721 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6722 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6723 id->sadb_ident_exttype = idexttype; 6724 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6725 memcpy(id + 1, fqdn, fqdnlen); 6726 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6727 } 6728 6729 if (idexttype) { 6730 /* create identity extension (USERFQDN) */ 6731 struct sadb_ident *id; 6732 int userfqdnlen; 6733 6734 if (userfqdn) { 6735 /* +1 for terminating-NUL */ 6736 userfqdnlen = strlen(userfqdn) + 1; 6737 } else 6738 userfqdnlen = 0; 6739 id = (struct sadb_ident *)p; 6740 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6741 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6742 id->sadb_ident_exttype = idexttype; 6743 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6744 /* XXX is it correct? */ 6745 if (curlwp) 6746 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6747 if (userfqdn && userfqdnlen) 6748 memcpy(id + 1, userfqdn, userfqdnlen); 6749 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6750 } 6751 #endif 6752 6753 /* XXX sensitivity (optional) */ 6754 6755 /* create proposal/combination extension */ 6756 m = key_getprop(saidx, mflag); 6757 #if 0 6758 /* 6759 * spec conformant: always attach proposal/combination extension, 6760 * the problem is that we have no way to attach it for ipcomp, 6761 * due to the way sadb_comb is declared in RFC2367. 6762 */ 6763 if (!m) { 6764 error = ENOBUFS; 6765 goto fail; 6766 } 6767 m_cat(result, m); 6768 #else 6769 /* 6770 * outside of spec; make proposal/combination extension optional. 6771 */ 6772 if (m) 6773 m_cat(result, m); 6774 #endif 6775 6776 KASSERT(result->m_flags & M_PKTHDR); 6777 KASSERT(result->m_len >= sizeof(struct sadb_msg)); 6778 6779 result->m_pkthdr.len = 0; 6780 for (m = result; m; m = m->m_next) 6781 result->m_pkthdr.len += m->m_len; 6782 6783 mtod(result, struct sadb_msg *)->sadb_msg_len = 6784 PFKEY_UNIT64(result->m_pkthdr.len); 6785 6786 /* 6787 * Called from key_api_acquire that must come from userland, so 6788 * we can call key_sendup_mbuf immediately. 6789 */ 6790 if (mflag == M_WAITOK) 6791 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6792 /* 6793 * XXX we cannot call key_sendup_mbuf directly here because 6794 * it can cause a deadlock: 6795 * - We have a reference to an SP (and an SA) here 6796 * - key_sendup_mbuf will try to take key_so_mtx 6797 * - Some other thread may try to localcount_drain to the SP with 6798 * holding key_so_mtx in say key_api_spdflush 6799 * - In this case localcount_drain never return because key_sendup_mbuf 6800 * that has stuck on key_so_mtx never release a reference to the SP 6801 * 6802 * So defer key_sendup_mbuf to the timer. 6803 */ 6804 return key_acquire_sendup_mbuf_later(result); 6805 6806 fail: 6807 if (result) 6808 m_freem(result); 6809 return error; 6810 } 6811 6812 static struct mbuf *key_acquire_mbuf_head = NULL; 6813 static unsigned key_acquire_mbuf_count = 0; 6814 #define KEY_ACQUIRE_MBUF_MAX 10 6815 6816 static void 6817 key_acquire_sendup_pending_mbuf(void) 6818 { 6819 struct mbuf *m, *prev; 6820 int error; 6821 6822 again: 6823 prev = NULL; 6824 mutex_enter(&key_misc.lock); 6825 m = key_acquire_mbuf_head; 6826 /* Get an earliest mbuf (one at the tail of the list) */ 6827 while (m != NULL) { 6828 if (m->m_nextpkt == NULL) { 6829 if (prev != NULL) 6830 prev->m_nextpkt = NULL; 6831 if (m == key_acquire_mbuf_head) 6832 key_acquire_mbuf_head = NULL; 6833 key_acquire_mbuf_count--; 6834 break; 6835 } 6836 prev = m; 6837 m = m->m_nextpkt; 6838 } 6839 mutex_exit(&key_misc.lock); 6840 6841 if (m == NULL) 6842 return; 6843 6844 m->m_nextpkt = NULL; 6845 error = key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 6846 if (error != 0) 6847 IPSECLOG(LOG_WARNING, "key_sendup_mbuf failed (error=%d)\n", 6848 error); 6849 6850 if (prev != NULL) 6851 goto again; 6852 } 6853 6854 static int 6855 key_acquire_sendup_mbuf_later(struct mbuf *m) 6856 { 6857 6858 mutex_enter(&key_misc.lock); 6859 /* Avoid queuing too much mbufs */ 6860 if (key_acquire_mbuf_count >= KEY_ACQUIRE_MBUF_MAX) { 6861 mutex_exit(&key_misc.lock); 6862 m_freem(m); 6863 return ENOBUFS; /* XXX */ 6864 } 6865 /* Enqueue mbuf at the head of the list */ 6866 m->m_nextpkt = key_acquire_mbuf_head; 6867 key_acquire_mbuf_head = m; 6868 key_acquire_mbuf_count++; 6869 mutex_exit(&key_misc.lock); 6870 6871 /* Kick the timer */ 6872 key_timehandler(NULL); 6873 6874 return 0; 6875 } 6876 6877 #ifndef IPSEC_NONBLOCK_ACQUIRE 6878 static struct secacq * 6879 key_newacq(const struct secasindex *saidx) 6880 { 6881 struct secacq *newacq; 6882 6883 /* get new entry */ 6884 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6885 if (newacq == NULL) { 6886 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6887 return NULL; 6888 } 6889 6890 /* copy secindex */ 6891 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6892 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6893 newacq->created = time_uptime; 6894 newacq->count = 0; 6895 6896 return newacq; 6897 } 6898 6899 static struct secacq * 6900 key_getacq(const struct secasindex *saidx) 6901 { 6902 struct secacq *acq; 6903 6904 KASSERT(mutex_owned(&key_misc.lock)); 6905 6906 LIST_FOREACH(acq, &key_misc.acqlist, chain) { 6907 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6908 return acq; 6909 } 6910 6911 return NULL; 6912 } 6913 6914 static struct secacq * 6915 key_getacqbyseq(u_int32_t seq) 6916 { 6917 struct secacq *acq; 6918 6919 KASSERT(mutex_owned(&key_misc.lock)); 6920 6921 LIST_FOREACH(acq, &key_misc.acqlist, chain) { 6922 if (acq->seq == seq) 6923 return acq; 6924 } 6925 6926 return NULL; 6927 } 6928 #endif 6929 6930 #ifdef notyet 6931 static struct secspacq * 6932 key_newspacq(const struct secpolicyindex *spidx) 6933 { 6934 struct secspacq *acq; 6935 6936 /* get new entry */ 6937 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6938 if (acq == NULL) { 6939 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6940 return NULL; 6941 } 6942 6943 /* copy secindex */ 6944 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6945 acq->created = time_uptime; 6946 acq->count = 0; 6947 6948 return acq; 6949 } 6950 6951 static struct secspacq * 6952 key_getspacq(const struct secpolicyindex *spidx) 6953 { 6954 struct secspacq *acq; 6955 6956 LIST_FOREACH(acq, &key_misc.spacqlist, chain) { 6957 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6958 return acq; 6959 } 6960 6961 return NULL; 6962 } 6963 #endif /* notyet */ 6964 6965 /* 6966 * SADB_ACQUIRE processing, 6967 * in first situation, is receiving 6968 * <base> 6969 * from the ikmpd, and clear sequence of its secasvar entry. 6970 * 6971 * In second situation, is receiving 6972 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6973 * from a user land process, and return 6974 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6975 * to the socket. 6976 * 6977 * m will always be freed. 6978 */ 6979 static int 6980 key_api_acquire(struct socket *so, struct mbuf *m, 6981 const struct sadb_msghdr *mhp) 6982 { 6983 const struct sockaddr *src, *dst; 6984 struct secasindex saidx; 6985 u_int16_t proto; 6986 int error; 6987 6988 /* 6989 * Error message from KMd. 6990 * We assume that if error was occurred in IKEd, the length of PFKEY 6991 * message is equal to the size of sadb_msg structure. 6992 * We do not raise error even if error occurred in this function. 6993 */ 6994 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6995 #ifndef IPSEC_NONBLOCK_ACQUIRE 6996 struct secacq *acq; 6997 6998 /* check sequence number */ 6999 if (mhp->msg->sadb_msg_seq == 0) { 7000 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 7001 m_freem(m); 7002 return 0; 7003 } 7004 7005 mutex_enter(&key_misc.lock); 7006 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 7007 if (acq == NULL) { 7008 mutex_exit(&key_misc.lock); 7009 /* 7010 * the specified larval SA is already gone, or we got 7011 * a bogus sequence number. we can silently ignore it. 7012 */ 7013 m_freem(m); 7014 return 0; 7015 } 7016 7017 /* reset acq counter in order to deletion by timehander. */ 7018 acq->created = time_uptime; 7019 acq->count = 0; 7020 mutex_exit(&key_misc.lock); 7021 #endif 7022 m_freem(m); 7023 return 0; 7024 } 7025 7026 /* 7027 * This message is from user land. 7028 */ 7029 7030 /* map satype to proto */ 7031 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 7032 if (proto == 0) { 7033 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7034 return key_senderror(so, m, EINVAL); 7035 } 7036 7037 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 7038 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 7039 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 7040 /* error */ 7041 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 7042 return key_senderror(so, m, EINVAL); 7043 } 7044 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 7045 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 7046 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 7047 /* error */ 7048 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 7049 return key_senderror(so, m, EINVAL); 7050 } 7051 7052 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 7053 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 7054 7055 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 7056 if (error != 0) 7057 return key_senderror(so, m, EINVAL); 7058 7059 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 7060 if (error != 0) 7061 return key_senderror(so, m, EINVAL); 7062 7063 /* get a SA index */ 7064 { 7065 struct secashead *sah; 7066 int s = pserialize_read_enter(); 7067 7068 sah = key_getsah(&saidx, CMP_MODE_REQID); 7069 if (sah != NULL) { 7070 pserialize_read_exit(s); 7071 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 7072 return key_senderror(so, m, EEXIST); 7073 } 7074 pserialize_read_exit(s); 7075 } 7076 7077 error = key_acquire(&saidx, NULL, M_WAITOK); 7078 if (error != 0) { 7079 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 7080 error); 7081 return key_senderror(so, m, error); 7082 } 7083 7084 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 7085 } 7086 7087 /* 7088 * SADB_REGISTER processing. 7089 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 7090 * receive 7091 * <base> 7092 * from the ikmpd, and register a socket to send PF_KEY messages, 7093 * and send 7094 * <base, supported> 7095 * to KMD by PF_KEY. 7096 * If socket is detached, must free from regnode. 7097 * 7098 * m will always be freed. 7099 */ 7100 static int 7101 key_api_register(struct socket *so, struct mbuf *m, 7102 const struct sadb_msghdr *mhp) 7103 { 7104 struct secreg *reg, *newreg = 0; 7105 7106 /* check for invalid register message */ 7107 if (mhp->msg->sadb_msg_satype >= __arraycount(key_misc.reglist)) 7108 return key_senderror(so, m, EINVAL); 7109 7110 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 7111 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 7112 goto setmsg; 7113 7114 /* Allocate regnode in advance, out of mutex */ 7115 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 7116 7117 /* check whether existing or not */ 7118 mutex_enter(&key_misc.lock); 7119 LIST_FOREACH(reg, &key_misc.reglist[mhp->msg->sadb_msg_satype], chain) { 7120 if (reg->so == so) { 7121 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 7122 mutex_exit(&key_misc.lock); 7123 kmem_free(newreg, sizeof(*newreg)); 7124 return key_senderror(so, m, EEXIST); 7125 } 7126 } 7127 7128 newreg->so = so; 7129 ((struct keycb *)sotorawcb(so))->kp_registered++; 7130 7131 /* add regnode to key_misc.reglist. */ 7132 LIST_INSERT_HEAD(&key_misc.reglist[mhp->msg->sadb_msg_satype], newreg, chain); 7133 mutex_exit(&key_misc.lock); 7134 7135 setmsg: 7136 { 7137 struct mbuf *n; 7138 struct sadb_supported *sup; 7139 u_int len, alen, elen; 7140 int off; 7141 int i; 7142 struct sadb_alg *alg; 7143 7144 /* create new sadb_msg to reply. */ 7145 alen = 0; 7146 for (i = 1; i <= SADB_AALG_MAX; i++) { 7147 if (ah_algorithm_lookup(i)) 7148 alen += sizeof(struct sadb_alg); 7149 } 7150 if (alen) 7151 alen += sizeof(struct sadb_supported); 7152 elen = 0; 7153 for (i = 1; i <= SADB_EALG_MAX; i++) { 7154 if (esp_algorithm_lookup(i)) 7155 elen += sizeof(struct sadb_alg); 7156 } 7157 if (elen) 7158 elen += sizeof(struct sadb_supported); 7159 7160 len = sizeof(struct sadb_msg) + alen + elen; 7161 7162 if (len > MCLBYTES) 7163 return key_senderror(so, m, ENOBUFS); 7164 7165 n = key_alloc_mbuf_simple(len, M_WAITOK); 7166 n->m_pkthdr.len = n->m_len = len; 7167 n->m_next = NULL; 7168 off = 0; 7169 7170 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 7171 key_fill_replymsg(n, 0); 7172 7173 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 7174 7175 /* for authentication algorithm */ 7176 if (alen) { 7177 sup = (struct sadb_supported *)(mtod(n, char *) + off); 7178 sup->sadb_supported_len = PFKEY_UNIT64(alen); 7179 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 7180 off += PFKEY_ALIGN8(sizeof(*sup)); 7181 7182 for (i = 1; i <= SADB_AALG_MAX; i++) { 7183 const struct auth_hash *aalgo; 7184 u_int16_t minkeysize, maxkeysize; 7185 7186 aalgo = ah_algorithm_lookup(i); 7187 if (!aalgo) 7188 continue; 7189 alg = (struct sadb_alg *)(mtod(n, char *) + off); 7190 alg->sadb_alg_id = i; 7191 alg->sadb_alg_ivlen = 0; 7192 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 7193 alg->sadb_alg_minbits = _BITS(minkeysize); 7194 alg->sadb_alg_maxbits = _BITS(maxkeysize); 7195 off += PFKEY_ALIGN8(sizeof(*alg)); 7196 } 7197 } 7198 7199 /* for encryption algorithm */ 7200 if (elen) { 7201 sup = (struct sadb_supported *)(mtod(n, char *) + off); 7202 sup->sadb_supported_len = PFKEY_UNIT64(elen); 7203 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 7204 off += PFKEY_ALIGN8(sizeof(*sup)); 7205 7206 for (i = 1; i <= SADB_EALG_MAX; i++) { 7207 const struct enc_xform *ealgo; 7208 7209 ealgo = esp_algorithm_lookup(i); 7210 if (!ealgo) 7211 continue; 7212 alg = (struct sadb_alg *)(mtod(n, char *) + off); 7213 alg->sadb_alg_id = i; 7214 alg->sadb_alg_ivlen = ealgo->blocksize; 7215 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 7216 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 7217 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 7218 } 7219 } 7220 7221 KASSERTMSG(off == len, "length inconsistency"); 7222 7223 m_freem(m); 7224 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 7225 } 7226 } 7227 7228 /* 7229 * free secreg entry registered. 7230 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 7231 */ 7232 void 7233 key_freereg(struct socket *so) 7234 { 7235 struct secreg *reg; 7236 int i; 7237 7238 KASSERT(!cpu_softintr_p()); 7239 KASSERT(so != NULL); 7240 7241 /* 7242 * check whether existing or not. 7243 * check all type of SA, because there is a potential that 7244 * one socket is registered to multiple type of SA. 7245 */ 7246 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7247 mutex_enter(&key_misc.lock); 7248 LIST_FOREACH(reg, &key_misc.reglist[i], chain) { 7249 if (reg->so == so) { 7250 LIST_REMOVE(reg, chain); 7251 break; 7252 } 7253 } 7254 mutex_exit(&key_misc.lock); 7255 if (reg != NULL) 7256 kmem_free(reg, sizeof(*reg)); 7257 } 7258 7259 return; 7260 } 7261 7262 /* 7263 * SADB_EXPIRE processing 7264 * send 7265 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 7266 * to KMD by PF_KEY. 7267 * NOTE: We send only soft lifetime extension. 7268 * 7269 * OUT: 0 : succeed 7270 * others : error number 7271 */ 7272 static int 7273 key_expire(struct secasvar *sav) 7274 { 7275 int s; 7276 int satype; 7277 struct mbuf *result = NULL, *m; 7278 int len; 7279 int error = -1; 7280 struct sadb_lifetime *lt; 7281 lifetime_counters_t sum = {0}; 7282 7283 /* XXX: Why do we lock ? */ 7284 s = splsoftnet(); /*called from softclock()*/ 7285 7286 KASSERT(sav != NULL); 7287 7288 satype = key_proto2satype(sav->sah->saidx.proto); 7289 KASSERTMSG(satype != 0, "invalid proto is passed"); 7290 7291 /* set msg header */ 7292 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, key_sa_refcnt(sav), 7293 M_WAITOK); 7294 result = m; 7295 7296 /* create SA extension */ 7297 m = key_setsadbsa(sav); 7298 m_cat(result, m); 7299 7300 /* create SA extension */ 7301 m = key_setsadbxsa2(sav->sah->saidx.mode, 7302 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 7303 m_cat(result, m); 7304 7305 /* create lifetime extension (current and soft) */ 7306 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 7307 m = key_alloc_mbuf(len, M_WAITOK); 7308 KASSERT(m->m_next == NULL); 7309 7310 memset(mtod(m, void *), 0, len); 7311 lt = mtod(m, struct sadb_lifetime *); 7312 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 7313 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 7314 percpu_foreach(sav->lft_c_counters_percpu, 7315 key_sum_lifetime_counters, sum); 7316 lt->sadb_lifetime_allocations = sum[LIFETIME_COUNTER_ALLOCATIONS]; 7317 lt->sadb_lifetime_bytes = sum[LIFETIME_COUNTER_BYTES]; 7318 lt->sadb_lifetime_addtime = 7319 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 7320 lt->sadb_lifetime_usetime = 7321 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 7322 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 7323 memcpy(lt, sav->lft_s, sizeof(*lt)); 7324 m_cat(result, m); 7325 7326 /* set sadb_address for source */ 7327 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 7328 FULLMASK, IPSEC_ULPROTO_ANY, M_WAITOK); 7329 m_cat(result, m); 7330 7331 /* set sadb_address for destination */ 7332 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 7333 FULLMASK, IPSEC_ULPROTO_ANY, M_WAITOK); 7334 m_cat(result, m); 7335 7336 if ((result->m_flags & M_PKTHDR) == 0) { 7337 error = EINVAL; 7338 goto fail; 7339 } 7340 7341 if (result->m_len < sizeof(struct sadb_msg)) { 7342 result = m_pullup(result, sizeof(struct sadb_msg)); 7343 if (result == NULL) { 7344 error = ENOBUFS; 7345 goto fail; 7346 } 7347 } 7348 7349 result->m_pkthdr.len = 0; 7350 for (m = result; m; m = m->m_next) 7351 result->m_pkthdr.len += m->m_len; 7352 7353 mtod(result, struct sadb_msg *)->sadb_msg_len = 7354 PFKEY_UNIT64(result->m_pkthdr.len); 7355 7356 splx(s); 7357 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7358 7359 fail: 7360 if (result) 7361 m_freem(result); 7362 splx(s); 7363 return error; 7364 } 7365 7366 /* 7367 * SADB_FLUSH processing 7368 * receive 7369 * <base> 7370 * from the ikmpd, and free all entries in secastree. 7371 * and send, 7372 * <base> 7373 * to the ikmpd. 7374 * NOTE: to do is only marking SADB_SASTATE_DEAD. 7375 * 7376 * m will always be freed. 7377 */ 7378 static int 7379 key_api_flush(struct socket *so, struct mbuf *m, 7380 const struct sadb_msghdr *mhp) 7381 { 7382 struct sadb_msg *newmsg; 7383 struct secashead *sah; 7384 struct secasvar *sav; 7385 u_int16_t proto; 7386 u_int8_t state; 7387 int s; 7388 7389 /* map satype to proto */ 7390 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 7391 if (proto == 0) { 7392 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7393 return key_senderror(so, m, EINVAL); 7394 } 7395 7396 /* no SATYPE specified, i.e. flushing all SA. */ 7397 s = pserialize_read_enter(); 7398 SAHLIST_READER_FOREACH(sah) { 7399 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 7400 proto != sah->saidx.proto) 7401 continue; 7402 7403 key_sah_ref(sah); 7404 pserialize_read_exit(s); 7405 7406 SASTATE_ALIVE_FOREACH(state) { 7407 restart: 7408 mutex_enter(&key_sad.lock); 7409 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7410 sav->state = SADB_SASTATE_DEAD; 7411 key_unlink_sav(sav); 7412 mutex_exit(&key_sad.lock); 7413 key_destroy_sav(sav); 7414 goto restart; 7415 } 7416 mutex_exit(&key_sad.lock); 7417 } 7418 7419 s = pserialize_read_enter(); 7420 sah->state = SADB_SASTATE_DEAD; 7421 key_sah_unref(sah); 7422 } 7423 pserialize_read_exit(s); 7424 7425 if (m->m_len < sizeof(struct sadb_msg) || 7426 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7427 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 7428 return key_senderror(so, m, ENOBUFS); 7429 } 7430 7431 if (m->m_next) 7432 m_freem(m->m_next); 7433 m->m_next = NULL; 7434 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7435 newmsg = mtod(m, struct sadb_msg *); 7436 newmsg->sadb_msg_errno = 0; 7437 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7438 7439 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7440 } 7441 7442 7443 static struct mbuf * 7444 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7445 { 7446 struct secashead *sah; 7447 struct secasvar *sav; 7448 u_int16_t proto; 7449 u_int8_t satype; 7450 u_int8_t state; 7451 int cnt; 7452 struct mbuf *m, *n, *prev; 7453 7454 KASSERT(mutex_owned(&key_sad.lock)); 7455 7456 *lenp = 0; 7457 7458 /* map satype to proto */ 7459 proto = key_satype2proto(req_satype); 7460 if (proto == 0) { 7461 *errorp = EINVAL; 7462 return (NULL); 7463 } 7464 7465 /* count sav entries to be sent to userland. */ 7466 cnt = 0; 7467 SAHLIST_WRITER_FOREACH(sah) { 7468 if (req_satype != SADB_SATYPE_UNSPEC && 7469 proto != sah->saidx.proto) 7470 continue; 7471 7472 SASTATE_ANY_FOREACH(state) { 7473 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7474 cnt++; 7475 } 7476 } 7477 } 7478 7479 if (cnt == 0) { 7480 *errorp = ENOENT; 7481 return (NULL); 7482 } 7483 7484 /* send this to the userland, one at a time. */ 7485 m = NULL; 7486 prev = m; 7487 SAHLIST_WRITER_FOREACH(sah) { 7488 if (req_satype != SADB_SATYPE_UNSPEC && 7489 proto != sah->saidx.proto) 7490 continue; 7491 7492 /* map proto to satype */ 7493 satype = key_proto2satype(sah->saidx.proto); 7494 if (satype == 0) { 7495 m_freem(m); 7496 *errorp = EINVAL; 7497 return (NULL); 7498 } 7499 7500 SASTATE_ANY_FOREACH(state) { 7501 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7502 n = key_setdumpsa(sav, SADB_DUMP, satype, 7503 --cnt, pid); 7504 if (!m) 7505 m = n; 7506 else 7507 prev->m_nextpkt = n; 7508 prev = n; 7509 } 7510 } 7511 } 7512 7513 if (!m) { 7514 *errorp = EINVAL; 7515 return (NULL); 7516 } 7517 7518 if ((m->m_flags & M_PKTHDR) != 0) { 7519 m->m_pkthdr.len = 0; 7520 for (n = m; n; n = n->m_next) 7521 m->m_pkthdr.len += n->m_len; 7522 } 7523 7524 *errorp = 0; 7525 return (m); 7526 } 7527 7528 /* 7529 * SADB_DUMP processing 7530 * dump all entries including status of DEAD in SAD. 7531 * receive 7532 * <base> 7533 * from the ikmpd, and dump all secasvar leaves 7534 * and send, 7535 * <base> ..... 7536 * to the ikmpd. 7537 * 7538 * m will always be freed. 7539 */ 7540 static int 7541 key_api_dump(struct socket *so, struct mbuf *m0, 7542 const struct sadb_msghdr *mhp) 7543 { 7544 u_int16_t proto; 7545 u_int8_t satype; 7546 struct mbuf *n; 7547 int error, len, ok; 7548 7549 /* map satype to proto */ 7550 satype = mhp->msg->sadb_msg_satype; 7551 proto = key_satype2proto(satype); 7552 if (proto == 0) { 7553 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7554 return key_senderror(so, m0, EINVAL); 7555 } 7556 7557 /* 7558 * If the requestor has insufficient socket-buffer space 7559 * for the entire chain, nobody gets any response to the DUMP. 7560 * XXX For now, only the requestor ever gets anything. 7561 * Moreover, if the requestor has any space at all, they receive 7562 * the entire chain, otherwise the request is refused with ENOBUFS. 7563 */ 7564 if (sbspace(&so->so_rcv) <= 0) { 7565 return key_senderror(so, m0, ENOBUFS); 7566 } 7567 7568 mutex_enter(&key_sad.lock); 7569 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7570 mutex_exit(&key_sad.lock); 7571 7572 if (n == NULL) { 7573 return key_senderror(so, m0, ENOENT); 7574 } 7575 { 7576 uint64_t *ps = PFKEY_STAT_GETREF(); 7577 ps[PFKEY_STAT_IN_TOTAL]++; 7578 ps[PFKEY_STAT_IN_BYTES] += len; 7579 PFKEY_STAT_PUTREF(); 7580 } 7581 7582 /* 7583 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7584 * The requestor receives either the entire chain, or an 7585 * error message with ENOBUFS. 7586 * 7587 * sbappendaddrchain() takes the chain of entries, one 7588 * packet-record per SPD entry, prepends the key_src sockaddr 7589 * to each packet-record, links the sockaddr mbufs into a new 7590 * list of records, then appends the entire resulting 7591 * list to the requesting socket. 7592 */ 7593 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7594 SB_PRIO_ONESHOT_OVERFLOW); 7595 7596 if (!ok) { 7597 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7598 m_freem(n); 7599 return key_senderror(so, m0, ENOBUFS); 7600 } 7601 7602 m_freem(m0); 7603 return 0; 7604 } 7605 7606 /* 7607 * SADB_X_PROMISC processing 7608 * 7609 * m will always be freed. 7610 */ 7611 static int 7612 key_api_promisc(struct socket *so, struct mbuf *m, 7613 const struct sadb_msghdr *mhp) 7614 { 7615 int olen; 7616 7617 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7618 7619 if (olen < sizeof(struct sadb_msg)) { 7620 #if 1 7621 return key_senderror(so, m, EINVAL); 7622 #else 7623 m_freem(m); 7624 return 0; 7625 #endif 7626 } else if (olen == sizeof(struct sadb_msg)) { 7627 /* enable/disable promisc mode */ 7628 struct keycb *kp = (struct keycb *)sotorawcb(so); 7629 if (kp == NULL) 7630 return key_senderror(so, m, EINVAL); 7631 mhp->msg->sadb_msg_errno = 0; 7632 switch (mhp->msg->sadb_msg_satype) { 7633 case 0: 7634 case 1: 7635 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7636 break; 7637 default: 7638 return key_senderror(so, m, EINVAL); 7639 } 7640 7641 /* send the original message back to everyone */ 7642 mhp->msg->sadb_msg_errno = 0; 7643 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7644 } else { 7645 /* send packet as is */ 7646 7647 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7648 7649 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7650 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7651 } 7652 } 7653 7654 static int (*key_api_typesw[]) (struct socket *, struct mbuf *, 7655 const struct sadb_msghdr *) = { 7656 NULL, /* SADB_RESERVED */ 7657 key_api_getspi, /* SADB_GETSPI */ 7658 key_api_update, /* SADB_UPDATE */ 7659 key_api_add, /* SADB_ADD */ 7660 key_api_delete, /* SADB_DELETE */ 7661 key_api_get, /* SADB_GET */ 7662 key_api_acquire, /* SADB_ACQUIRE */ 7663 key_api_register, /* SADB_REGISTER */ 7664 NULL, /* SADB_EXPIRE */ 7665 key_api_flush, /* SADB_FLUSH */ 7666 key_api_dump, /* SADB_DUMP */ 7667 key_api_promisc, /* SADB_X_PROMISC */ 7668 NULL, /* SADB_X_PCHANGE */ 7669 key_api_spdadd, /* SADB_X_SPDUPDATE */ 7670 key_api_spdadd, /* SADB_X_SPDADD */ 7671 key_api_spddelete, /* SADB_X_SPDDELETE */ 7672 key_api_spdget, /* SADB_X_SPDGET */ 7673 NULL, /* SADB_X_SPDACQUIRE */ 7674 key_api_spddump, /* SADB_X_SPDDUMP */ 7675 key_api_spdflush, /* SADB_X_SPDFLUSH */ 7676 key_api_spdadd, /* SADB_X_SPDSETIDX */ 7677 NULL, /* SADB_X_SPDEXPIRE */ 7678 key_api_spddelete2, /* SADB_X_SPDDELETE2 */ 7679 key_api_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7680 }; 7681 7682 /* 7683 * parse sadb_msg buffer to process PFKEYv2, 7684 * and create a data to response if needed. 7685 * I think to be dealed with mbuf directly. 7686 * IN: 7687 * msgp : pointer to pointer to a received buffer pulluped. 7688 * This is rewrited to response. 7689 * so : pointer to socket. 7690 * OUT: 7691 * length for buffer to send to user process. 7692 */ 7693 int 7694 key_parse(struct mbuf *m, struct socket *so) 7695 { 7696 struct sadb_msg *msg; 7697 struct sadb_msghdr mh; 7698 u_int orglen; 7699 int error; 7700 7701 KASSERT(m != NULL); 7702 KASSERT(so != NULL); 7703 7704 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7705 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7706 kdebug_sadb("passed sadb_msg", msg); 7707 } 7708 #endif 7709 7710 if (m->m_len < sizeof(struct sadb_msg)) { 7711 m = m_pullup(m, sizeof(struct sadb_msg)); 7712 if (!m) 7713 return ENOBUFS; 7714 } 7715 msg = mtod(m, struct sadb_msg *); 7716 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7717 7718 if ((m->m_flags & M_PKTHDR) == 0 || 7719 m->m_pkthdr.len != orglen) { 7720 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7721 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7722 error = EINVAL; 7723 goto senderror; 7724 } 7725 7726 if (msg->sadb_msg_version != PF_KEY_V2) { 7727 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7728 msg->sadb_msg_version); 7729 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7730 error = EINVAL; 7731 goto senderror; 7732 } 7733 7734 if (msg->sadb_msg_type > SADB_MAX) { 7735 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7736 msg->sadb_msg_type); 7737 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7738 error = EINVAL; 7739 goto senderror; 7740 } 7741 7742 /* for old-fashioned code - should be nuked */ 7743 if (m->m_pkthdr.len > MCLBYTES) { 7744 m_freem(m); 7745 return ENOBUFS; 7746 } 7747 if (m->m_next) { 7748 struct mbuf *n; 7749 7750 n = key_alloc_mbuf_simple(m->m_pkthdr.len, M_WAITOK); 7751 7752 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7753 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7754 n->m_next = NULL; 7755 m_freem(m); 7756 m = n; 7757 } 7758 7759 /* align the mbuf chain so that extensions are in contiguous region. */ 7760 error = key_align(m, &mh); 7761 if (error) 7762 return error; 7763 7764 if (m->m_next) { /*XXX*/ 7765 m_freem(m); 7766 return ENOBUFS; 7767 } 7768 7769 msg = mh.msg; 7770 7771 /* check SA type */ 7772 switch (msg->sadb_msg_satype) { 7773 case SADB_SATYPE_UNSPEC: 7774 switch (msg->sadb_msg_type) { 7775 case SADB_GETSPI: 7776 case SADB_UPDATE: 7777 case SADB_ADD: 7778 case SADB_DELETE: 7779 case SADB_GET: 7780 case SADB_ACQUIRE: 7781 case SADB_EXPIRE: 7782 IPSECLOG(LOG_DEBUG, 7783 "must specify satype when msg type=%u.\n", 7784 msg->sadb_msg_type); 7785 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7786 error = EINVAL; 7787 goto senderror; 7788 } 7789 break; 7790 case SADB_SATYPE_AH: 7791 case SADB_SATYPE_ESP: 7792 case SADB_X_SATYPE_IPCOMP: 7793 case SADB_X_SATYPE_TCPSIGNATURE: 7794 switch (msg->sadb_msg_type) { 7795 case SADB_X_SPDADD: 7796 case SADB_X_SPDDELETE: 7797 case SADB_X_SPDGET: 7798 case SADB_X_SPDDUMP: 7799 case SADB_X_SPDFLUSH: 7800 case SADB_X_SPDSETIDX: 7801 case SADB_X_SPDUPDATE: 7802 case SADB_X_SPDDELETE2: 7803 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7804 msg->sadb_msg_type); 7805 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7806 error = EINVAL; 7807 goto senderror; 7808 } 7809 break; 7810 case SADB_SATYPE_RSVP: 7811 case SADB_SATYPE_OSPFV2: 7812 case SADB_SATYPE_RIPV2: 7813 case SADB_SATYPE_MIP: 7814 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7815 msg->sadb_msg_satype); 7816 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7817 error = EOPNOTSUPP; 7818 goto senderror; 7819 case 1: /* XXX: What does it do? */ 7820 if (msg->sadb_msg_type == SADB_X_PROMISC) 7821 break; 7822 /*FALLTHROUGH*/ 7823 default: 7824 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7825 msg->sadb_msg_satype); 7826 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7827 error = EINVAL; 7828 goto senderror; 7829 } 7830 7831 /* check field of upper layer protocol and address family */ 7832 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7833 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7834 const struct sadb_address *src0, *dst0; 7835 const struct sockaddr *sa0, *da0; 7836 u_int plen; 7837 7838 src0 = mh.ext[SADB_EXT_ADDRESS_SRC]; 7839 dst0 = mh.ext[SADB_EXT_ADDRESS_DST]; 7840 sa0 = key_msghdr_get_sockaddr(&mh, SADB_EXT_ADDRESS_SRC); 7841 da0 = key_msghdr_get_sockaddr(&mh, SADB_EXT_ADDRESS_DST); 7842 7843 /* check upper layer protocol */ 7844 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7845 IPSECLOG(LOG_DEBUG, 7846 "upper layer protocol mismatched.\n"); 7847 goto invaddr; 7848 } 7849 7850 /* check family */ 7851 if (sa0->sa_family != da0->sa_family) { 7852 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7853 goto invaddr; 7854 } 7855 if (sa0->sa_len != da0->sa_len) { 7856 IPSECLOG(LOG_DEBUG, 7857 "address struct size mismatched.\n"); 7858 goto invaddr; 7859 } 7860 7861 switch (sa0->sa_family) { 7862 case AF_INET: 7863 if (sa0->sa_len != sizeof(struct sockaddr_in)) 7864 goto invaddr; 7865 break; 7866 case AF_INET6: 7867 if (sa0->sa_len != sizeof(struct sockaddr_in6)) 7868 goto invaddr; 7869 break; 7870 default: 7871 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7872 error = EAFNOSUPPORT; 7873 goto senderror; 7874 } 7875 7876 switch (sa0->sa_family) { 7877 case AF_INET: 7878 plen = sizeof(struct in_addr) << 3; 7879 break; 7880 case AF_INET6: 7881 plen = sizeof(struct in6_addr) << 3; 7882 break; 7883 default: 7884 plen = 0; /*fool gcc*/ 7885 break; 7886 } 7887 7888 /* check max prefix length */ 7889 if (src0->sadb_address_prefixlen > plen || 7890 dst0->sadb_address_prefixlen > plen) { 7891 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7892 goto invaddr; 7893 } 7894 7895 /* 7896 * prefixlen == 0 is valid because there can be a case when 7897 * all addresses are matched. 7898 */ 7899 } 7900 7901 if (msg->sadb_msg_type >= __arraycount(key_api_typesw) || 7902 key_api_typesw[msg->sadb_msg_type] == NULL) { 7903 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7904 error = EINVAL; 7905 goto senderror; 7906 } 7907 7908 return (*key_api_typesw[msg->sadb_msg_type])(so, m, &mh); 7909 7910 invaddr: 7911 error = EINVAL; 7912 senderror: 7913 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7914 return key_senderror(so, m, error); 7915 } 7916 7917 static int 7918 key_senderror(struct socket *so, struct mbuf *m, int code) 7919 { 7920 struct sadb_msg *msg; 7921 7922 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7923 7924 if (so == NULL) { 7925 /* 7926 * This means the request comes from kernel. 7927 * As the request comes from kernel, it is unnecessary to 7928 * send message to userland. Just return errcode directly. 7929 */ 7930 m_freem(m); 7931 return code; 7932 } 7933 7934 msg = mtod(m, struct sadb_msg *); 7935 msg->sadb_msg_errno = code; 7936 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7937 } 7938 7939 /* 7940 * set the pointer to each header into message buffer. 7941 * m will be freed on error. 7942 * XXX larger-than-MCLBYTES extension? 7943 */ 7944 static int 7945 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7946 { 7947 struct mbuf *n; 7948 struct sadb_ext *ext; 7949 size_t off, end; 7950 int extlen; 7951 int toff; 7952 7953 KASSERT(m != NULL); 7954 KASSERT(mhp != NULL); 7955 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7956 7957 /* initialize */ 7958 memset(mhp, 0, sizeof(*mhp)); 7959 7960 mhp->msg = mtod(m, struct sadb_msg *); 7961 mhp->ext[0] = mhp->msg; /*XXX backward compat */ 7962 7963 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7964 extlen = end; /*just in case extlen is not updated*/ 7965 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7966 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7967 if (!n) { 7968 /* m is already freed */ 7969 return ENOBUFS; 7970 } 7971 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7972 7973 /* set pointer */ 7974 switch (ext->sadb_ext_type) { 7975 case SADB_EXT_SA: 7976 case SADB_EXT_ADDRESS_SRC: 7977 case SADB_EXT_ADDRESS_DST: 7978 case SADB_EXT_ADDRESS_PROXY: 7979 case SADB_EXT_LIFETIME_CURRENT: 7980 case SADB_EXT_LIFETIME_HARD: 7981 case SADB_EXT_LIFETIME_SOFT: 7982 case SADB_EXT_KEY_AUTH: 7983 case SADB_EXT_KEY_ENCRYPT: 7984 case SADB_EXT_IDENTITY_SRC: 7985 case SADB_EXT_IDENTITY_DST: 7986 case SADB_EXT_SENSITIVITY: 7987 case SADB_EXT_PROPOSAL: 7988 case SADB_EXT_SUPPORTED_AUTH: 7989 case SADB_EXT_SUPPORTED_ENCRYPT: 7990 case SADB_EXT_SPIRANGE: 7991 case SADB_X_EXT_POLICY: 7992 case SADB_X_EXT_SA2: 7993 case SADB_X_EXT_NAT_T_TYPE: 7994 case SADB_X_EXT_NAT_T_SPORT: 7995 case SADB_X_EXT_NAT_T_DPORT: 7996 case SADB_X_EXT_NAT_T_OAI: 7997 case SADB_X_EXT_NAT_T_OAR: 7998 case SADB_X_EXT_NAT_T_FRAG: 7999 /* duplicate check */ 8000 /* 8001 * XXX Are there duplication payloads of either 8002 * KEY_AUTH or KEY_ENCRYPT ? 8003 */ 8004 if (mhp->ext[ext->sadb_ext_type] != NULL) { 8005 IPSECLOG(LOG_DEBUG, 8006 "duplicate ext_type %u is passed.\n", 8007 ext->sadb_ext_type); 8008 m_freem(m); 8009 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 8010 return EINVAL; 8011 } 8012 break; 8013 default: 8014 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 8015 ext->sadb_ext_type); 8016 m_freem(m); 8017 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 8018 return EINVAL; 8019 } 8020 8021 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 8022 8023 if (key_validate_ext(ext, extlen)) { 8024 m_freem(m); 8025 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 8026 return EINVAL; 8027 } 8028 8029 n = m_pulldown(m, off, extlen, &toff); 8030 if (!n) { 8031 /* m is already freed */ 8032 return ENOBUFS; 8033 } 8034 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 8035 8036 mhp->ext[ext->sadb_ext_type] = ext; 8037 mhp->extoff[ext->sadb_ext_type] = off; 8038 mhp->extlen[ext->sadb_ext_type] = extlen; 8039 } 8040 8041 if (off != end) { 8042 m_freem(m); 8043 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 8044 return EINVAL; 8045 } 8046 8047 return 0; 8048 } 8049 8050 static int 8051 key_validate_ext(const struct sadb_ext *ext, int len) 8052 { 8053 const struct sockaddr *sa; 8054 enum { NONE, ADDR } checktype = NONE; 8055 int baselen = 0; 8056 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 8057 8058 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 8059 return EINVAL; 8060 8061 /* if it does not match minimum/maximum length, bail */ 8062 if (ext->sadb_ext_type >= __arraycount(minsize) || 8063 ext->sadb_ext_type >= __arraycount(maxsize)) 8064 return EINVAL; 8065 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 8066 return EINVAL; 8067 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 8068 return EINVAL; 8069 8070 /* more checks based on sadb_ext_type XXX need more */ 8071 switch (ext->sadb_ext_type) { 8072 case SADB_EXT_ADDRESS_SRC: 8073 case SADB_EXT_ADDRESS_DST: 8074 case SADB_EXT_ADDRESS_PROXY: 8075 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 8076 checktype = ADDR; 8077 break; 8078 case SADB_EXT_IDENTITY_SRC: 8079 case SADB_EXT_IDENTITY_DST: 8080 if (((const struct sadb_ident *)ext)->sadb_ident_type == 8081 SADB_X_IDENTTYPE_ADDR) { 8082 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 8083 checktype = ADDR; 8084 } else 8085 checktype = NONE; 8086 break; 8087 default: 8088 checktype = NONE; 8089 break; 8090 } 8091 8092 switch (checktype) { 8093 case NONE: 8094 break; 8095 case ADDR: 8096 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 8097 if (len < baselen + sal) 8098 return EINVAL; 8099 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 8100 return EINVAL; 8101 break; 8102 } 8103 8104 return 0; 8105 } 8106 8107 static int 8108 key_do_init(void) 8109 { 8110 int i, error; 8111 8112 mutex_init(&key_misc.lock, MUTEX_DEFAULT, IPL_NONE); 8113 8114 mutex_init(&key_spd.lock, MUTEX_DEFAULT, IPL_NONE); 8115 cv_init(&key_spd.cv_lc, "key_sp_lc"); 8116 key_spd.psz = pserialize_create(); 8117 cv_init(&key_spd.cv_psz, "key_sp_psz"); 8118 key_spd.psz_performing = false; 8119 8120 mutex_init(&key_sad.lock, MUTEX_DEFAULT, IPL_NONE); 8121 cv_init(&key_sad.cv_lc, "key_sa_lc"); 8122 key_sad.psz = pserialize_create(); 8123 cv_init(&key_sad.cv_psz, "key_sa_psz"); 8124 key_sad.psz_performing = false; 8125 8126 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 8127 8128 callout_init(&key_timehandler_ch, CALLOUT_MPSAFE); 8129 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 8130 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 8131 if (error != 0) 8132 panic("%s: workqueue_create failed (%d)\n", __func__, error); 8133 8134 for (i = 0; i < IPSEC_DIR_MAX; i++) { 8135 PSLIST_INIT(&key_spd.splist[i]); 8136 } 8137 8138 PSLIST_INIT(&key_spd.socksplist); 8139 8140 key_sad.sahlists = hashinit(SAHHASH_NHASH, HASH_PSLIST, true, 8141 &key_sad.sahlistmask); 8142 key_sad.savlut = hashinit(SAVLUT_NHASH, HASH_PSLIST, true, 8143 &key_sad.savlutmask); 8144 8145 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 8146 LIST_INIT(&key_misc.reglist[i]); 8147 } 8148 8149 #ifndef IPSEC_NONBLOCK_ACQUIRE 8150 LIST_INIT(&key_misc.acqlist); 8151 #endif 8152 #ifdef notyet 8153 LIST_INIT(&key_misc.spacqlist); 8154 #endif 8155 8156 /* system default */ 8157 ip4_def_policy.policy = IPSEC_POLICY_NONE; 8158 ip4_def_policy.state = IPSEC_SPSTATE_ALIVE; 8159 localcount_init(&ip4_def_policy.localcount); 8160 8161 #ifdef INET6 8162 ip6_def_policy.policy = IPSEC_POLICY_NONE; 8163 ip6_def_policy.state = IPSEC_SPSTATE_ALIVE; 8164 localcount_init(&ip6_def_policy.localcount); 8165 #endif 8166 8167 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 8168 8169 /* initialize key statistics */ 8170 keystat.getspi_count = 1; 8171 8172 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 8173 8174 return (0); 8175 } 8176 8177 void 8178 key_init(void) 8179 { 8180 static ONCE_DECL(key_init_once); 8181 8182 sysctl_net_keyv2_setup(NULL); 8183 sysctl_net_key_compat_setup(NULL); 8184 8185 RUN_ONCE(&key_init_once, key_do_init); 8186 8187 key_init_so(); 8188 } 8189 8190 /* 8191 * XXX: maybe This function is called after INBOUND IPsec processing. 8192 * 8193 * Special check for tunnel-mode packets. 8194 * We must make some checks for consistency between inner and outer IP header. 8195 * 8196 * xxx more checks to be provided 8197 */ 8198 int 8199 key_checktunnelsanity( 8200 struct secasvar *sav, 8201 u_int family, 8202 void *src, 8203 void *dst 8204 ) 8205 { 8206 8207 /* XXX: check inner IP header */ 8208 8209 return 1; 8210 } 8211 8212 #if 0 8213 #define hostnamelen strlen(hostname) 8214 8215 /* 8216 * Get FQDN for the host. 8217 * If the administrator configured hostname (by hostname(1)) without 8218 * domain name, returns nothing. 8219 */ 8220 static const char * 8221 key_getfqdn(void) 8222 { 8223 int i; 8224 int hasdot; 8225 static char fqdn[MAXHOSTNAMELEN + 1]; 8226 8227 if (!hostnamelen) 8228 return NULL; 8229 8230 /* check if it comes with domain name. */ 8231 hasdot = 0; 8232 for (i = 0; i < hostnamelen; i++) { 8233 if (hostname[i] == '.') 8234 hasdot++; 8235 } 8236 if (!hasdot) 8237 return NULL; 8238 8239 /* NOTE: hostname may not be NUL-terminated. */ 8240 memset(fqdn, 0, sizeof(fqdn)); 8241 memcpy(fqdn, hostname, hostnamelen); 8242 fqdn[hostnamelen] = '\0'; 8243 return fqdn; 8244 } 8245 8246 /* 8247 * get username@FQDN for the host/user. 8248 */ 8249 static const char * 8250 key_getuserfqdn(void) 8251 { 8252 const char *host; 8253 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 8254 struct proc *p = curproc; 8255 char *q; 8256 8257 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 8258 return NULL; 8259 if (!(host = key_getfqdn())) 8260 return NULL; 8261 8262 /* NOTE: s_login may not be-NUL terminated. */ 8263 memset(userfqdn, 0, sizeof(userfqdn)); 8264 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 8265 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 8266 q = userfqdn + strlen(userfqdn); 8267 *q++ = '@'; 8268 memcpy(q, host, strlen(host)); 8269 q += strlen(host); 8270 *q++ = '\0'; 8271 8272 return userfqdn; 8273 } 8274 #endif 8275 8276 /* record data transfer on SA, and update timestamps */ 8277 void 8278 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 8279 { 8280 lifetime_counters_t *counters; 8281 8282 KASSERT(sav != NULL); 8283 KASSERT(sav->lft_c != NULL); 8284 KASSERT(m != NULL); 8285 8286 counters = percpu_getref(sav->lft_c_counters_percpu); 8287 8288 /* 8289 * XXX Currently, there is a difference of bytes size 8290 * between inbound and outbound processing. 8291 */ 8292 (*counters)[LIFETIME_COUNTER_BYTES] += m->m_pkthdr.len; 8293 /* to check bytes lifetime is done in key_timehandler(). */ 8294 8295 /* 8296 * We use the number of packets as the unit of 8297 * sadb_lifetime_allocations. We increment the variable 8298 * whenever {esp,ah}_{in,out}put is called. 8299 */ 8300 (*counters)[LIFETIME_COUNTER_ALLOCATIONS]++; 8301 /* XXX check for expires? */ 8302 8303 percpu_putref(sav->lft_c_counters_percpu); 8304 8305 /* 8306 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 8307 * in seconds. HARD and SOFT lifetime are measured by the time 8308 * difference (again in seconds) from sadb_lifetime_usetime. 8309 * 8310 * usetime 8311 * v expire expire 8312 * -----+-----+--------+---> t 8313 * <--------------> HARD 8314 * <-----> SOFT 8315 */ 8316 sav->lft_c->sadb_lifetime_usetime = time_uptime; 8317 /* XXX check for expires? */ 8318 8319 return; 8320 } 8321 8322 /* dumb version */ 8323 void 8324 key_sa_routechange(struct sockaddr *dst) 8325 { 8326 struct secashead *sah; 8327 int s; 8328 8329 s = pserialize_read_enter(); 8330 SAHLIST_READER_FOREACH(sah) { 8331 struct route *ro; 8332 const struct sockaddr *sa; 8333 8334 key_sah_ref(sah); 8335 pserialize_read_exit(s); 8336 8337 ro = &sah->sa_route; 8338 sa = rtcache_getdst(ro); 8339 if (sa != NULL && dst->sa_len == sa->sa_len && 8340 memcmp(dst, sa, dst->sa_len) == 0) 8341 rtcache_free(ro); 8342 8343 s = pserialize_read_enter(); 8344 key_sah_unref(sah); 8345 } 8346 pserialize_read_exit(s); 8347 8348 return; 8349 } 8350 8351 static void 8352 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 8353 { 8354 struct secasvar *_sav; 8355 8356 ASSERT_SLEEPABLE(); 8357 KASSERT(mutex_owned(&key_sad.lock)); 8358 8359 if (sav->state == state) 8360 return; 8361 8362 key_unlink_sav(sav); 8363 localcount_fini(&sav->localcount); 8364 SAVLIST_ENTRY_DESTROY(sav); 8365 key_init_sav(sav); 8366 8367 sav->state = state; 8368 if (!SADB_SASTATE_USABLE_P(sav)) { 8369 /* We don't need to care about the order */ 8370 SAVLIST_WRITER_INSERT_HEAD(sav->sah, state, sav); 8371 return; 8372 } 8373 /* 8374 * Sort the list by lft_c->sadb_lifetime_addtime 8375 * in ascending order. 8376 */ 8377 SAVLIST_WRITER_FOREACH(_sav, sav->sah, state) { 8378 if (_sav->lft_c->sadb_lifetime_addtime > 8379 sav->lft_c->sadb_lifetime_addtime) { 8380 SAVLIST_WRITER_INSERT_BEFORE(_sav, sav); 8381 break; 8382 } 8383 } 8384 if (_sav == NULL) { 8385 SAVLIST_WRITER_INSERT_TAIL(sav->sah, state, sav); 8386 } 8387 8388 SAVLUT_WRITER_INSERT_HEAD(sav); 8389 8390 key_validate_savlist(sav->sah, state); 8391 } 8392 8393 /* XXX too much? */ 8394 static struct mbuf * 8395 key_alloc_mbuf(int l, int mflag) 8396 { 8397 struct mbuf *m = NULL, *n; 8398 int len, t; 8399 8400 KASSERT(mflag == M_NOWAIT || (mflag == M_WAITOK && !cpu_softintr_p())); 8401 8402 len = l; 8403 while (len > 0) { 8404 MGET(n, mflag, MT_DATA); 8405 if (n && len > MLEN) { 8406 MCLGET(n, mflag); 8407 if ((n->m_flags & M_EXT) == 0) { 8408 m_freem(n); 8409 n = NULL; 8410 } 8411 } 8412 if (!n) { 8413 m_freem(m); 8414 return NULL; 8415 } 8416 8417 n->m_next = NULL; 8418 n->m_len = 0; 8419 n->m_len = M_TRAILINGSPACE(n); 8420 /* use the bottom of mbuf, hoping we can prepend afterwards */ 8421 if (n->m_len > len) { 8422 t = (n->m_len - len) & ~(sizeof(long) - 1); 8423 n->m_data += t; 8424 n->m_len = len; 8425 } 8426 8427 len -= n->m_len; 8428 8429 if (m) 8430 m_cat(m, n); 8431 else 8432 m = n; 8433 } 8434 8435 return m; 8436 } 8437 8438 static struct mbuf * 8439 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 8440 { 8441 struct secashead *sah; 8442 struct secasvar *sav; 8443 u_int16_t proto; 8444 u_int8_t satype; 8445 u_int8_t state; 8446 int cnt; 8447 struct mbuf *m, *n; 8448 8449 KASSERT(mutex_owned(&key_sad.lock)); 8450 8451 /* map satype to proto */ 8452 proto = key_satype2proto(req_satype); 8453 if (proto == 0) { 8454 *errorp = EINVAL; 8455 return (NULL); 8456 } 8457 8458 /* count sav entries to be sent to the userland. */ 8459 cnt = 0; 8460 SAHLIST_WRITER_FOREACH(sah) { 8461 if (req_satype != SADB_SATYPE_UNSPEC && 8462 proto != sah->saidx.proto) 8463 continue; 8464 8465 SASTATE_ANY_FOREACH(state) { 8466 SAVLIST_WRITER_FOREACH(sav, sah, state) { 8467 cnt++; 8468 } 8469 } 8470 } 8471 8472 if (cnt == 0) { 8473 *errorp = ENOENT; 8474 return (NULL); 8475 } 8476 8477 /* send this to the userland, one at a time. */ 8478 m = NULL; 8479 SAHLIST_WRITER_FOREACH(sah) { 8480 if (req_satype != SADB_SATYPE_UNSPEC && 8481 proto != sah->saidx.proto) 8482 continue; 8483 8484 /* map proto to satype */ 8485 satype = key_proto2satype(sah->saidx.proto); 8486 if (satype == 0) { 8487 m_freem(m); 8488 *errorp = EINVAL; 8489 return (NULL); 8490 } 8491 8492 SASTATE_ANY_FOREACH(state) { 8493 SAVLIST_WRITER_FOREACH(sav, sah, state) { 8494 n = key_setdumpsa(sav, SADB_DUMP, satype, 8495 --cnt, pid); 8496 if (!m) 8497 m = n; 8498 else 8499 m_cat(m, n); 8500 } 8501 } 8502 } 8503 8504 if (!m) { 8505 *errorp = EINVAL; 8506 return (NULL); 8507 } 8508 8509 if ((m->m_flags & M_PKTHDR) != 0) { 8510 m->m_pkthdr.len = 0; 8511 for (n = m; n; n = n->m_next) 8512 m->m_pkthdr.len += n->m_len; 8513 } 8514 8515 *errorp = 0; 8516 return (m); 8517 } 8518 8519 static struct mbuf * 8520 key_setspddump(int *errorp, pid_t pid) 8521 { 8522 struct secpolicy *sp; 8523 int cnt; 8524 u_int dir; 8525 struct mbuf *m, *n; 8526 8527 KASSERT(mutex_owned(&key_spd.lock)); 8528 8529 /* search SPD entry and get buffer size. */ 8530 cnt = 0; 8531 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8532 SPLIST_WRITER_FOREACH(sp, dir) { 8533 cnt++; 8534 } 8535 } 8536 8537 if (cnt == 0) { 8538 *errorp = ENOENT; 8539 return (NULL); 8540 } 8541 8542 m = NULL; 8543 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8544 SPLIST_WRITER_FOREACH(sp, dir) { 8545 --cnt; 8546 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8547 8548 if (!m) 8549 m = n; 8550 else { 8551 m->m_pkthdr.len += n->m_pkthdr.len; 8552 m_cat(m, n); 8553 } 8554 } 8555 } 8556 8557 *errorp = 0; 8558 return (m); 8559 } 8560 8561 int 8562 key_get_used(void) { 8563 return !SPLIST_READER_EMPTY(IPSEC_DIR_INBOUND) || 8564 !SPLIST_READER_EMPTY(IPSEC_DIR_OUTBOUND) || 8565 !SOCKSPLIST_READER_EMPTY(); 8566 } 8567 8568 void 8569 key_update_used(void) 8570 { 8571 switch (ipsec_enabled) { 8572 default: 8573 case 0: 8574 #ifdef notyet 8575 /* XXX: racy */ 8576 ipsec_used = 0; 8577 #endif 8578 break; 8579 case 1: 8580 #ifndef notyet 8581 /* XXX: racy */ 8582 if (!ipsec_used) 8583 #endif 8584 ipsec_used = key_get_used(); 8585 break; 8586 case 2: 8587 ipsec_used = 1; 8588 break; 8589 } 8590 } 8591 8592 static inline void 8593 key_savlut_writer_insert_head(struct secasvar *sav) 8594 { 8595 uint32_t hash_key; 8596 uint32_t hash; 8597 8598 KASSERT(mutex_owned(&key_sad.lock)); 8599 KASSERT(!sav->savlut_added); 8600 8601 if (sav->sah->saidx.proto == IPPROTO_IPCOMP) 8602 hash_key = sav->alg_comp; 8603 else 8604 hash_key = sav->spi; 8605 8606 hash = key_savluthash(&sav->sah->saidx.dst.sa, 8607 sav->sah->saidx.proto, hash_key, key_sad.savlutmask); 8608 8609 PSLIST_WRITER_INSERT_HEAD(&key_sad.savlut[hash], sav, 8610 pslist_entry_savlut); 8611 sav->savlut_added = true; 8612 } 8613 8614 /* 8615 * Calculate hash using protocol, source address, 8616 * and destination address included in saidx. 8617 */ 8618 static inline uint32_t 8619 key_saidxhash(const struct secasindex *saidx, u_long mask) 8620 { 8621 uint32_t hash32; 8622 const struct sockaddr_in *sin; 8623 const struct sockaddr_in6 *sin6; 8624 8625 hash32 = saidx->proto; 8626 8627 switch (saidx->src.sa.sa_family) { 8628 case AF_INET: 8629 sin = &saidx->src.sin; 8630 hash32 = hash32_buf(&sin->sin_addr, 8631 sizeof(sin->sin_addr), hash32); 8632 sin = &saidx->dst.sin; 8633 hash32 = hash32_buf(&sin->sin_addr, 8634 sizeof(sin->sin_addr), hash32 << 1); 8635 break; 8636 case AF_INET6: 8637 sin6 = &saidx->src.sin6; 8638 hash32 = hash32_buf(&sin6->sin6_addr, 8639 sizeof(sin6->sin6_addr), hash32); 8640 sin6 = &saidx->dst.sin6; 8641 hash32 = hash32_buf(&sin6->sin6_addr, 8642 sizeof(sin6->sin6_addr), hash32 << 1); 8643 break; 8644 default: 8645 hash32 = 0; 8646 break; 8647 } 8648 8649 return hash32 & mask; 8650 } 8651 8652 /* 8653 * Calculate hash using destination address, protocol, 8654 * and spi. Those parameter depend on the search of 8655 * key_lookup_sa(). 8656 */ 8657 static uint32_t 8658 key_savluthash(const struct sockaddr *dst, uint32_t proto, 8659 uint32_t spi, u_long mask) 8660 { 8661 uint32_t hash32; 8662 const struct sockaddr_in *sin; 8663 const struct sockaddr_in6 *sin6; 8664 8665 hash32 = hash32_buf(&proto, sizeof(proto), spi); 8666 8667 switch(dst->sa_family) { 8668 case AF_INET: 8669 sin = satocsin(dst); 8670 hash32 = hash32_buf(&sin->sin_addr, 8671 sizeof(sin->sin_addr), hash32); 8672 break; 8673 case AF_INET6: 8674 sin6 = satocsin6(dst); 8675 hash32 = hash32_buf(&sin6->sin6_addr, 8676 sizeof(sin6->sin6_addr), hash32); 8677 break; 8678 default: 8679 hash32 = 0; 8680 } 8681 8682 return hash32 & mask; 8683 } 8684 8685 static int 8686 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8687 { 8688 struct mbuf *m, *n; 8689 int err2 = 0; 8690 char *p, *ep; 8691 size_t len; 8692 int error; 8693 8694 if (newp) 8695 return (EPERM); 8696 if (namelen != 1) 8697 return (EINVAL); 8698 8699 mutex_enter(&key_sad.lock); 8700 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8701 mutex_exit(&key_sad.lock); 8702 if (!m) 8703 return (error); 8704 if (!oldp) 8705 *oldlenp = m->m_pkthdr.len; 8706 else { 8707 p = oldp; 8708 if (*oldlenp < m->m_pkthdr.len) { 8709 err2 = ENOMEM; 8710 ep = p + *oldlenp; 8711 } else { 8712 *oldlenp = m->m_pkthdr.len; 8713 ep = p + m->m_pkthdr.len; 8714 } 8715 for (n = m; n; n = n->m_next) { 8716 len = (ep - p < n->m_len) ? 8717 ep - p : n->m_len; 8718 error = copyout(mtod(n, const void *), p, len); 8719 p += len; 8720 if (error) 8721 break; 8722 } 8723 if (error == 0) 8724 error = err2; 8725 } 8726 m_freem(m); 8727 8728 return (error); 8729 } 8730 8731 static int 8732 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8733 { 8734 struct mbuf *m, *n; 8735 int err2 = 0; 8736 char *p, *ep; 8737 size_t len; 8738 int error; 8739 8740 if (newp) 8741 return (EPERM); 8742 if (namelen != 0) 8743 return (EINVAL); 8744 8745 mutex_enter(&key_spd.lock); 8746 m = key_setspddump(&error, l->l_proc->p_pid); 8747 mutex_exit(&key_spd.lock); 8748 if (!m) 8749 return (error); 8750 if (!oldp) 8751 *oldlenp = m->m_pkthdr.len; 8752 else { 8753 p = oldp; 8754 if (*oldlenp < m->m_pkthdr.len) { 8755 err2 = ENOMEM; 8756 ep = p + *oldlenp; 8757 } else { 8758 *oldlenp = m->m_pkthdr.len; 8759 ep = p + m->m_pkthdr.len; 8760 } 8761 for (n = m; n; n = n->m_next) { 8762 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8763 error = copyout(mtod(n, const void *), p, len); 8764 p += len; 8765 if (error) 8766 break; 8767 } 8768 if (error == 0) 8769 error = err2; 8770 } 8771 m_freem(m); 8772 8773 return (error); 8774 } 8775 8776 /* 8777 * Create sysctl tree for native IPSEC key knobs, originally 8778 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8779 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8780 * and in any case the part of our sysctl namespace used for dumping the 8781 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8782 * namespace, for API reasons. 8783 * 8784 * Pending a consensus on the right way to fix this, add a level of 8785 * indirection in how we number the `native' IPSEC key nodes; 8786 * and (as requested by Andrew Brown) move registration of the 8787 * KAME-compatible names to a separate function. 8788 */ 8789 #if 0 8790 # define IPSEC_PFKEY PF_KEY_V2 8791 # define IPSEC_PFKEY_NAME "keyv2" 8792 #else 8793 # define IPSEC_PFKEY PF_KEY 8794 # define IPSEC_PFKEY_NAME "key" 8795 #endif 8796 8797 static int 8798 sysctl_net_key_stats(SYSCTLFN_ARGS) 8799 { 8800 8801 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8802 } 8803 8804 static void 8805 sysctl_net_keyv2_setup(struct sysctllog **clog) 8806 { 8807 8808 sysctl_createv(clog, 0, NULL, NULL, 8809 CTLFLAG_PERMANENT, 8810 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8811 NULL, 0, NULL, 0, 8812 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8813 8814 sysctl_createv(clog, 0, NULL, NULL, 8815 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8816 CTLTYPE_INT, "debug", NULL, 8817 NULL, 0, &key_debug_level, 0, 8818 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8819 sysctl_createv(clog, 0, NULL, NULL, 8820 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8821 CTLTYPE_INT, "spi_try", NULL, 8822 NULL, 0, &key_spi_trycnt, 0, 8823 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8824 sysctl_createv(clog, 0, NULL, NULL, 8825 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8826 CTLTYPE_INT, "spi_min_value", NULL, 8827 NULL, 0, &key_spi_minval, 0, 8828 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8829 sysctl_createv(clog, 0, NULL, NULL, 8830 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8831 CTLTYPE_INT, "spi_max_value", NULL, 8832 NULL, 0, &key_spi_maxval, 0, 8833 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8834 sysctl_createv(clog, 0, NULL, NULL, 8835 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8836 CTLTYPE_INT, "random_int", NULL, 8837 NULL, 0, &key_int_random, 0, 8838 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8839 sysctl_createv(clog, 0, NULL, NULL, 8840 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8841 CTLTYPE_INT, "larval_lifetime", NULL, 8842 NULL, 0, &key_larval_lifetime, 0, 8843 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8844 sysctl_createv(clog, 0, NULL, NULL, 8845 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8846 CTLTYPE_INT, "blockacq_count", NULL, 8847 NULL, 0, &key_blockacq_count, 0, 8848 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8849 sysctl_createv(clog, 0, NULL, NULL, 8850 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8851 CTLTYPE_INT, "blockacq_lifetime", NULL, 8852 NULL, 0, &key_blockacq_lifetime, 0, 8853 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8854 sysctl_createv(clog, 0, NULL, NULL, 8855 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8856 CTLTYPE_INT, "esp_keymin", NULL, 8857 NULL, 0, &ipsec_esp_keymin, 0, 8858 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8859 sysctl_createv(clog, 0, NULL, NULL, 8860 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8861 CTLTYPE_INT, "prefered_oldsa", NULL, 8862 NULL, 0, &key_prefered_oldsa, 0, 8863 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8864 sysctl_createv(clog, 0, NULL, NULL, 8865 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8866 CTLTYPE_INT, "esp_auth", NULL, 8867 NULL, 0, &ipsec_esp_auth, 0, 8868 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8869 sysctl_createv(clog, 0, NULL, NULL, 8870 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8871 CTLTYPE_INT, "ah_keymin", NULL, 8872 NULL, 0, &ipsec_ah_keymin, 0, 8873 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8874 sysctl_createv(clog, 0, NULL, NULL, 8875 CTLFLAG_PERMANENT, 8876 CTLTYPE_STRUCT, "stats", 8877 SYSCTL_DESCR("PF_KEY statistics"), 8878 sysctl_net_key_stats, 0, NULL, 0, 8879 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8880 } 8881 8882 /* 8883 * Register sysctl names used by setkey(8). For historical reasons, 8884 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8885 * for both IPSEC and KAME IPSEC. 8886 */ 8887 static void 8888 sysctl_net_key_compat_setup(struct sysctllog **clog) 8889 { 8890 8891 sysctl_createv(clog, 0, NULL, NULL, 8892 CTLFLAG_PERMANENT, 8893 CTLTYPE_NODE, "key", NULL, 8894 NULL, 0, NULL, 0, 8895 CTL_NET, PF_KEY, CTL_EOL); 8896 8897 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8898 sysctl_createv(clog, 0, NULL, NULL, 8899 CTLFLAG_PERMANENT, 8900 CTLTYPE_STRUCT, "dumpsa", NULL, 8901 sysctl_net_key_dumpsa, 0, NULL, 0, 8902 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8903 sysctl_createv(clog, 0, NULL, NULL, 8904 CTLFLAG_PERMANENT, 8905 CTLTYPE_STRUCT, "dumpsp", NULL, 8906 sysctl_net_key_dumpsp, 0, NULL, 0, 8907 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8908 } 8909
Indexes created Tue Sep 23 02:09:52 GMT 2025