key.c revision 1.208
1 /* $NetBSD: key.c,v 1.208 2017/08/07 03:21:58 ozaki-r 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 1.208 2017/08/07 03:21:58 ozaki-r Exp $"); 36 37 /* 38 * This code is referd 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 76 #include <net/if.h> 77 #include <net/route.h> 78 79 #include <netinet/in.h> 80 #include <netinet/in_systm.h> 81 #include <netinet/ip.h> 82 #include <netinet/in_var.h> 83 #ifdef INET 84 #include <netinet/ip_var.h> 85 #endif 86 87 #ifdef INET6 88 #include <netinet/ip6.h> 89 #include <netinet6/in6_var.h> 90 #include <netinet6/ip6_var.h> 91 #endif /* INET6 */ 92 93 #ifdef INET 94 #include <netinet/in_pcb.h> 95 #endif 96 #ifdef INET6 97 #include <netinet6/in6_pcb.h> 98 #endif /* INET6 */ 99 100 #include <net/pfkeyv2.h> 101 #include <netipsec/keydb.h> 102 #include <netipsec/key.h> 103 #include <netipsec/keysock.h> 104 #include <netipsec/key_debug.h> 105 106 #include <netipsec/ipsec.h> 107 #ifdef INET6 108 #include <netipsec/ipsec6.h> 109 #endif 110 #include <netipsec/ipsec_private.h> 111 112 #include <netipsec/xform.h> 113 #include <netipsec/ipcomp.h> 114 115 116 #include <net/net_osdep.h> 117 118 #define FULLMASK 0xff 119 #define _BITS(bytes) ((bytes) << 3) 120 121 #define PORT_NONE 0 122 #define PORT_LOOSE 1 123 #define PORT_STRICT 2 124 125 percpu_t *pfkeystat_percpu; 126 127 /* 128 * Note on SA reference counting: 129 * - SAs that are not in DEAD state will have (total external reference + 1) 130 * following value in reference count field. they cannot be freed and are 131 * referenced from SA header. 132 * - SAs that are in DEAD state will have (total external reference) 133 * in reference count field. they are ready to be freed. reference from 134 * SA header will be removed in key_delsav(), when the reference count 135 * field hits 0 (= no external reference other than from SA header. 136 */ 137 138 /* 139 * Locking notes on SPD: 140 * - Modifications to the key_spd.splist must be done with holding key_spd.lock 141 * which is a adaptive mutex 142 * - Read accesses to the key_spd.splist must be in critical sections of pserialize(9) 143 * - SP's lifetime is managed by localcount(9) 144 * - An SP that has been inserted to the key_spd.splist is initially referenced by none, 145 * i.e., a reference from the key_spd.splist isn't counted 146 * - When an SP is being destroyed, we change its state as DEAD, wait for 147 * references to the SP to be released, and then deallocate the SP 148 * (see key_unlink_sp) 149 * - Getting an SP 150 * - Normally we get an SP from the key_spd.splist by incrementing the reference count 151 * of the SP 152 * - We can gain another reference from a held SP only if we check its state 153 * and take its reference in a critical section of pserialize 154 * (see esp_output for example) 155 * - We may get an SP from an SP cache. See below 156 * - Updating member variables of an SP 157 * - Most member variables of an SP are immutable 158 * - Only sp->state and sp->lastused can be changed 159 * - sp->state of an SP is updated only when destroying it under key_spd.lock 160 * - SP caches 161 * - SPs can be cached in PCBs 162 * - The lifetime of the caches is controlled by the global generation counter 163 * (ipsec_spdgen) 164 * - The global counter value is stored when an SP is cached 165 * - If the stored value is different from the global counter then the cache 166 * is considered invalidated 167 * - The counter is incremented when an SP is being destroyed 168 * - So checking the generation and taking a reference to an SP should be 169 * in a critical section of pserialize 170 * - Note that caching doesn't increment the reference counter of an SP 171 * - SPs in sockets 172 * - Userland programs can set a policy to a socket by 173 * setsockopt(IP_IPSEC_POLICY) 174 * - Such policies (SPs) are set to a socket (PCB) and also inserted to 175 * the key_spd.socksplist list (not the key_spd.splist) 176 * - Such a policy is destroyed when a corresponding socket is destroed, 177 * however, a socket can be destroyed in softint so we cannot destroy 178 * it directly instead we just mark it DEAD and delay the destruction 179 * until GC by the timer 180 */ 181 182 u_int32_t key_debug_level = 0; 183 static u_int key_spi_trycnt = 1000; 184 static u_int32_t key_spi_minval = 0x100; 185 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 186 static u_int32_t policy_id = 0; 187 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 188 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 189 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 190 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 191 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 192 193 static u_int32_t acq_seq = 0; 194 195 static pserialize_t key_psz; 196 197 /* SPD */ 198 static struct { 199 kmutex_t lock; 200 kcondvar_t cv; 201 struct pslist_head splist[IPSEC_DIR_MAX]; 202 /* 203 * The list has SPs that are set to a socket via 204 * setsockopt(IP_IPSEC_POLICY) from userland. See ipsec_set_policy. 205 */ 206 struct pslist_head socksplist; 207 } key_spd __cacheline_aligned; 208 209 /* SAD */ 210 static struct { 211 kmutex_t lock; 212 struct pslist_head sahlist; 213 } key_sad __cacheline_aligned; 214 215 /* Misc data */ 216 static struct { 217 kmutex_t lock; 218 /* registed list */ 219 LIST_HEAD(_reglist, secreg) reglist[SADB_SATYPE_MAX + 1]; 220 #ifndef IPSEC_NONBLOCK_ACQUIRE 221 /* acquiring list */ 222 LIST_HEAD(_acqlist, secacq) acqlist; 223 #endif 224 #ifdef notyet 225 /* SP acquiring list */ 226 LIST_HEAD(_spacqlist, secspacq) spacqlist; 227 #endif 228 } key_misc __cacheline_aligned; 229 230 /* Macros for key_spd.splist */ 231 #define SPLIST_ENTRY_INIT(sp) \ 232 PSLIST_ENTRY_INIT((sp), pslist_entry) 233 #define SPLIST_ENTRY_DESTROY(sp) \ 234 PSLIST_ENTRY_DESTROY((sp), pslist_entry) 235 #define SPLIST_WRITER_REMOVE(sp) \ 236 PSLIST_WRITER_REMOVE((sp), pslist_entry) 237 #define SPLIST_READER_EMPTY(dir) \ 238 (PSLIST_READER_FIRST(&key_spd.splist[(dir)], struct secpolicy, \ 239 pslist_entry) == NULL) 240 #define SPLIST_READER_FOREACH(sp, dir) \ 241 PSLIST_READER_FOREACH((sp), &key_spd.splist[(dir)], \ 242 struct secpolicy, pslist_entry) 243 #define SPLIST_WRITER_FOREACH(sp, dir) \ 244 PSLIST_WRITER_FOREACH((sp), &key_spd.splist[(dir)], \ 245 struct secpolicy, pslist_entry) 246 #define SPLIST_WRITER_INSERT_AFTER(sp, new) \ 247 PSLIST_WRITER_INSERT_AFTER((sp), (new), pslist_entry) 248 #define SPLIST_WRITER_EMPTY(dir) \ 249 (PSLIST_WRITER_FIRST(&key_spd.splist[(dir)], struct secpolicy, \ 250 pslist_entry) == NULL) 251 #define SPLIST_WRITER_INSERT_HEAD(dir, sp) \ 252 PSLIST_WRITER_INSERT_HEAD(&key_spd.splist[(dir)], (sp), \ 253 pslist_entry) 254 #define SPLIST_WRITER_NEXT(sp) \ 255 PSLIST_WRITER_NEXT((sp), struct secpolicy, pslist_entry) 256 #define SPLIST_WRITER_INSERT_TAIL(dir, new) \ 257 do { \ 258 if (SPLIST_WRITER_EMPTY((dir))) { \ 259 SPLIST_WRITER_INSERT_HEAD((dir), (new)); \ 260 } else { \ 261 struct secpolicy *__sp; \ 262 SPLIST_WRITER_FOREACH(__sp, (dir)) { \ 263 if (SPLIST_WRITER_NEXT(__sp) == NULL) { \ 264 SPLIST_WRITER_INSERT_AFTER(__sp,\ 265 (new)); \ 266 break; \ 267 } \ 268 } \ 269 } \ 270 } while (0) 271 272 /* Macros for key_spd.socksplist */ 273 #define SOCKSPLIST_WRITER_FOREACH(sp) \ 274 PSLIST_WRITER_FOREACH((sp), &key_spd.socksplist, \ 275 struct secpolicy, pslist_entry) 276 #define SOCKSPLIST_READER_EMPTY() \ 277 (PSLIST_READER_FIRST(&key_spd.socksplist, struct secpolicy, \ 278 pslist_entry) == NULL) 279 280 /* Macros for key_sad.sahlist */ 281 #define SAHLIST_ENTRY_INIT(sah) \ 282 PSLIST_ENTRY_INIT((sah), pslist_entry) 283 #define SAHLIST_ENTRY_DESTROY(sah) \ 284 PSLIST_ENTRY_DESTROY((sah), pslist_entry) 285 #define SAHLIST_WRITER_REMOVE(sah) \ 286 PSLIST_WRITER_REMOVE((sah), pslist_entry) 287 #define SAHLIST_READER_FOREACH(sah) \ 288 PSLIST_READER_FOREACH((sah), &key_sad.sahlist, struct secashead,\ 289 pslist_entry) 290 #define SAHLIST_WRITER_FOREACH(sah) \ 291 PSLIST_WRITER_FOREACH((sah), &key_sad.sahlist, struct secashead,\ 292 pslist_entry) 293 #define SAHLIST_WRITER_INSERT_HEAD(sah) \ 294 PSLIST_WRITER_INSERT_HEAD(&key_sad.sahlist, (sah), pslist_entry) 295 296 /* Macros for key_sad.sahlist#savlist */ 297 #define SAVLIST_ENTRY_INIT(sav) \ 298 PSLIST_ENTRY_INIT((sav), pslist_entry) 299 #define SAVLIST_ENTRY_DESTROY(sav) \ 300 PSLIST_ENTRY_DESTROY((sav), pslist_entry) 301 #define SAVLIST_READER_FIRST(sah, state) \ 302 PSLIST_READER_FIRST(&(sah)->savlist[(state)], struct secasvar, \ 303 pslist_entry) 304 #define SAVLIST_WRITER_REMOVE(sav) \ 305 PSLIST_WRITER_REMOVE((sav), pslist_entry) 306 #define SAVLIST_READER_FOREACH(sav, sah, state) \ 307 PSLIST_READER_FOREACH((sav), &(sah)->savlist[(state)], \ 308 struct secasvar, pslist_entry) 309 #define SAVLIST_WRITER_FOREACH(sav, sah, state) \ 310 PSLIST_WRITER_FOREACH((sav), &(sah)->savlist[(state)], \ 311 struct secasvar, pslist_entry) 312 #define SAVLIST_WRITER_INSERT_BEFORE(sav, new) \ 313 PSLIST_WRITER_INSERT_BEFORE((sav), (new), pslist_entry) 314 #define SAVLIST_WRITER_INSERT_AFTER(sav, new) \ 315 PSLIST_WRITER_INSERT_AFTER((sav), (new), pslist_entry) 316 #define SAVLIST_WRITER_EMPTY(sah, state) \ 317 (PSLIST_WRITER_FIRST(&(sah)->savlist[(state)], struct secasvar, \ 318 pslist_entry) == NULL) 319 #define SAVLIST_WRITER_INSERT_HEAD(sah, state, sav) \ 320 PSLIST_WRITER_INSERT_HEAD(&(sah)->savlist[(state)], (sav), \ 321 pslist_entry) 322 #define SAVLIST_WRITER_NEXT(sav) \ 323 PSLIST_WRITER_NEXT((sav), struct secasvar, pslist_entry) 324 #define SAVLIST_WRITER_INSERT_TAIL(sah, state, new) \ 325 do { \ 326 if (SAVLIST_WRITER_EMPTY((sah), (state))) { \ 327 SAVLIST_WRITER_INSERT_HEAD((sah), (state), (new));\ 328 } else { \ 329 struct secasvar *__sav; \ 330 SAVLIST_WRITER_FOREACH(__sav, (sah), (state)) { \ 331 if (SAVLIST_WRITER_NEXT(__sav) == NULL) {\ 332 SAVLIST_WRITER_INSERT_AFTER(__sav,\ 333 (new)); \ 334 break; \ 335 } \ 336 } \ 337 } \ 338 } while (0) 339 #define SAVLIST_READER_NEXT(sav) \ 340 PSLIST_READER_NEXT((sav), struct secasvar, pslist_entry) 341 342 343 /* search order for SAs */ 344 /* 345 * This order is important because we must select the oldest SA 346 * for outbound processing. For inbound, This is not important. 347 */ 348 static const u_int saorder_state_valid_prefer_old[] = { 349 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 350 }; 351 static const u_int saorder_state_valid_prefer_new[] = { 352 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 353 }; 354 355 static const u_int saorder_state_alive[] = { 356 /* except DEAD */ 357 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 358 }; 359 static const u_int saorder_state_any[] = { 360 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 361 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 362 }; 363 364 #define SASTATE_ALIVE_FOREACH(s) \ 365 for (int _i = 0; \ 366 _i < __arraycount(saorder_state_alive) ? \ 367 (s) = saorder_state_alive[_i], true : false; \ 368 _i++) 369 #define SASTATE_ANY_FOREACH(s) \ 370 for (int _i = 0; \ 371 _i < __arraycount(saorder_state_any) ? \ 372 (s) = saorder_state_any[_i], true : false; \ 373 _i++) 374 375 static const int minsize[] = { 376 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 377 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 378 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 379 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 380 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 381 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 382 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 383 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 384 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 385 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 386 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 387 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 388 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 389 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 390 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 391 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 392 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 393 0, /* SADB_X_EXT_KMPRIVATE */ 394 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 395 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 396 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 397 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 398 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 399 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 400 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 401 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 402 }; 403 static const int maxsize[] = { 404 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 405 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 406 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 407 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 408 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 409 0, /* SADB_EXT_ADDRESS_SRC */ 410 0, /* SADB_EXT_ADDRESS_DST */ 411 0, /* SADB_EXT_ADDRESS_PROXY */ 412 0, /* SADB_EXT_KEY_AUTH */ 413 0, /* SADB_EXT_KEY_ENCRYPT */ 414 0, /* SADB_EXT_IDENTITY_SRC */ 415 0, /* SADB_EXT_IDENTITY_DST */ 416 0, /* SADB_EXT_SENSITIVITY */ 417 0, /* SADB_EXT_PROPOSAL */ 418 0, /* SADB_EXT_SUPPORTED_AUTH */ 419 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 420 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 421 0, /* SADB_X_EXT_KMPRIVATE */ 422 0, /* SADB_X_EXT_POLICY */ 423 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 424 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 425 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 426 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 427 0, /* SADB_X_EXT_NAT_T_OAI */ 428 0, /* SADB_X_EXT_NAT_T_OAR */ 429 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 430 }; 431 432 static int ipsec_esp_keymin = 256; 433 static int ipsec_esp_auth = 0; 434 static int ipsec_ah_keymin = 128; 435 436 #ifdef SYSCTL_DECL 437 SYSCTL_DECL(_net_key); 438 #endif 439 440 #ifdef SYSCTL_INT 441 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 442 &key_debug_level, 0, ""); 443 444 /* max count of trial for the decision of spi value */ 445 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 446 &key_spi_trycnt, 0, ""); 447 448 /* minimum spi value to allocate automatically. */ 449 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 450 &key_spi_minval, 0, ""); 451 452 /* maximun spi value to allocate automatically. */ 453 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 454 &key_spi_maxval, 0, ""); 455 456 /* interval to initialize randseed */ 457 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 458 &key_int_random, 0, ""); 459 460 /* lifetime for larval SA */ 461 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 462 &key_larval_lifetime, 0, ""); 463 464 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 465 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 466 &key_blockacq_count, 0, ""); 467 468 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 469 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 470 &key_blockacq_lifetime, 0, ""); 471 472 /* ESP auth */ 473 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 474 &ipsec_esp_auth, 0, ""); 475 476 /* minimum ESP key length */ 477 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 478 &ipsec_esp_keymin, 0, ""); 479 480 /* minimum AH key length */ 481 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 482 &ipsec_ah_keymin, 0, ""); 483 484 /* perfered old SA rather than new SA */ 485 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 486 &key_prefered_oldsa, 0, ""); 487 #endif /* SYSCTL_INT */ 488 489 #define __LIST_CHAINED(elm) \ 490 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 491 #define LIST_INSERT_TAIL(head, elm, type, field) \ 492 do {\ 493 struct type *curelm = LIST_FIRST(head); \ 494 if (curelm == NULL) {\ 495 LIST_INSERT_HEAD(head, elm, field); \ 496 } else { \ 497 while (LIST_NEXT(curelm, field)) \ 498 curelm = LIST_NEXT(curelm, field);\ 499 LIST_INSERT_AFTER(curelm, elm, field);\ 500 }\ 501 } while (0) 502 503 #define KEY_CHKSASTATE(head, sav) \ 504 /* do */ { \ 505 if ((head) != (sav)) { \ 506 IPSECLOG(LOG_DEBUG, \ 507 "state mismatched (TREE=%d SA=%d)\n", \ 508 (head), (sav)); \ 509 continue; \ 510 } \ 511 } /* while (0) */ 512 513 #define KEY_CHKSPDIR(head, sp) \ 514 do { \ 515 if ((head) != (sp)) { \ 516 IPSECLOG(LOG_DEBUG, \ 517 "direction mismatched (TREE=%d SP=%d), anyway continue.\n",\ 518 (head), (sp)); \ 519 } \ 520 } while (0) 521 522 /* 523 * set parameters into secasindex buffer. 524 * Must allocate secasindex buffer before calling this function. 525 */ 526 static int 527 key_setsecasidx(int, int, int, const struct sockaddr *, 528 const struct sockaddr *, struct secasindex *); 529 530 /* key statistics */ 531 struct _keystat { 532 u_long getspi_count; /* the avarage of count to try to get new SPI */ 533 } keystat; 534 535 struct sadb_msghdr { 536 struct sadb_msg *msg; 537 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 538 int extoff[SADB_EXT_MAX + 1]; 539 int extlen[SADB_EXT_MAX + 1]; 540 }; 541 542 static void 543 key_init_spidx_bymsghdr(struct secpolicyindex *, const struct sadb_msghdr *); 544 545 static const struct sockaddr * 546 key_msghdr_get_sockaddr(const struct sadb_msghdr *mhp, int idx) 547 { 548 549 return PFKEY_ADDR_SADDR((struct sadb_address *)mhp->ext[idx]); 550 } 551 552 static struct mbuf * 553 key_fill_replymsg(struct mbuf *m, int seq) 554 { 555 struct sadb_msg *msg; 556 557 if (m->m_len < sizeof(*msg)) { 558 m = m_pullup(m, sizeof(*msg)); 559 if (m == NULL) 560 return NULL; 561 } 562 msg = mtod(m, struct sadb_msg *); 563 msg->sadb_msg_errno = 0; 564 msg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 565 if (seq != 0) 566 msg->sadb_msg_seq = seq; 567 568 return m; 569 } 570 571 static struct secasvar *key_lookup_sa_bysaidx(const struct secasindex *); 572 #if 0 573 static void key_freeso(struct socket *); 574 static void key_freesp_so(struct secpolicy **); 575 #endif 576 static struct secpolicy *key_getsp (const struct secpolicyindex *); 577 static struct secpolicy *key_getspbyid (u_int32_t); 578 static struct secpolicy *key_lookup_and_remove_sp(const struct secpolicyindex *); 579 static struct secpolicy *key_lookupbyid_and_remove_sp(u_int32_t); 580 static void key_destroy_sp(struct secpolicy *); 581 static u_int16_t key_newreqid (void); 582 static struct mbuf *key_gather_mbuf (struct mbuf *, 583 const struct sadb_msghdr *, int, int, ...); 584 static int key_api_spdadd(struct socket *, struct mbuf *, 585 const struct sadb_msghdr *); 586 static u_int32_t key_getnewspid (void); 587 static int key_api_spddelete(struct socket *, struct mbuf *, 588 const struct sadb_msghdr *); 589 static int key_api_spddelete2(struct socket *, struct mbuf *, 590 const struct sadb_msghdr *); 591 static int key_api_spdget(struct socket *, struct mbuf *, 592 const struct sadb_msghdr *); 593 static int key_api_spdflush(struct socket *, struct mbuf *, 594 const struct sadb_msghdr *); 595 static int key_api_spddump(struct socket *, struct mbuf *, 596 const struct sadb_msghdr *); 597 static struct mbuf * key_setspddump (int *errorp, pid_t); 598 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 599 static int key_api_nat_map(struct socket *, struct mbuf *, 600 const struct sadb_msghdr *); 601 static struct mbuf *key_setdumpsp (struct secpolicy *, 602 u_int8_t, u_int32_t, pid_t); 603 static u_int key_getspreqmsglen (const struct secpolicy *); 604 static int key_spdexpire (struct secpolicy *); 605 static struct secashead *key_newsah (const struct secasindex *); 606 static void key_delsah (struct secashead *); 607 static struct secasvar *key_newsav(struct mbuf *, 608 const struct sadb_msghdr *, int *, const char*, int); 609 #define KEY_NEWSAV(m, sadb, e) \ 610 key_newsav(m, sadb, e, __func__, __LINE__) 611 static void key_delsav (struct secasvar *); 612 static struct secashead *key_getsah(const struct secasindex *, int); 613 static bool key_checkspidup(const struct secasindex *, u_int32_t); 614 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 615 static int key_setsaval (struct secasvar *, struct mbuf *, 616 const struct sadb_msghdr *); 617 static void key_freesaval(struct secasvar *); 618 static int key_init_xform(struct secasvar *); 619 static void key_clear_xform(struct secasvar *); 620 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 621 u_int8_t, u_int32_t, u_int32_t); 622 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 623 static struct mbuf *key_setsadbxtype (u_int16_t); 624 static struct mbuf *key_setsadbxfrag (u_int16_t); 625 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 626 static int key_checksalen (const union sockaddr_union *); 627 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 628 u_int32_t, pid_t, u_int16_t); 629 static struct mbuf *key_setsadbsa (struct secasvar *); 630 static struct mbuf *key_setsadbaddr (u_int16_t, 631 const struct sockaddr *, u_int8_t, u_int16_t); 632 #if 0 633 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 634 int, u_int64_t); 635 #endif 636 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 637 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 638 u_int32_t); 639 static void *key_newbuf (const void *, u_int); 640 #ifdef INET6 641 static int key_ismyaddr6 (const struct sockaddr_in6 *); 642 #endif 643 644 static void sysctl_net_keyv2_setup(struct sysctllog **); 645 static void sysctl_net_key_compat_setup(struct sysctllog **); 646 647 /* flags for key_saidx_match() */ 648 #define CMP_HEAD 1 /* protocol, addresses. */ 649 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 650 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 651 #define CMP_EXACTLY 4 /* all elements. */ 652 static int key_saidx_match(const struct secasindex *, 653 const struct secasindex *, int); 654 655 static int key_sockaddr_match(const struct sockaddr *, 656 const struct sockaddr *, int); 657 static int key_bb_match_withmask(const void *, const void *, u_int); 658 static u_int16_t key_satype2proto (u_int8_t); 659 static u_int8_t key_proto2satype (u_int16_t); 660 661 static int key_spidx_match_exactly(const struct secpolicyindex *, 662 const struct secpolicyindex *); 663 static int key_spidx_match_withmask(const struct secpolicyindex *, 664 const struct secpolicyindex *); 665 666 static int key_api_getspi(struct socket *, struct mbuf *, 667 const struct sadb_msghdr *); 668 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 669 const struct secasindex *); 670 static int key_handle_natt_info (struct secasvar *, 671 const struct sadb_msghdr *); 672 static int key_set_natt_ports (union sockaddr_union *, 673 union sockaddr_union *, 674 const struct sadb_msghdr *); 675 static int key_api_update(struct socket *, struct mbuf *, 676 const struct sadb_msghdr *); 677 #ifdef IPSEC_DOSEQCHECK 678 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 679 #endif 680 static int key_api_add(struct socket *, struct mbuf *, 681 const struct sadb_msghdr *); 682 static int key_setident (struct secashead *, struct mbuf *, 683 const struct sadb_msghdr *); 684 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 685 const struct sadb_msghdr *); 686 static int key_api_delete(struct socket *, struct mbuf *, 687 const struct sadb_msghdr *); 688 static int key_api_get(struct socket *, struct mbuf *, 689 const struct sadb_msghdr *); 690 691 static void key_getcomb_setlifetime (struct sadb_comb *); 692 static struct mbuf *key_getcomb_esp (void); 693 static struct mbuf *key_getcomb_ah (void); 694 static struct mbuf *key_getcomb_ipcomp (void); 695 static struct mbuf *key_getprop (const struct secasindex *); 696 697 static int key_acquire (const struct secasindex *, struct secpolicy *); 698 #ifndef IPSEC_NONBLOCK_ACQUIRE 699 static struct secacq *key_newacq (const struct secasindex *); 700 static struct secacq *key_getacq (const struct secasindex *); 701 static struct secacq *key_getacqbyseq (u_int32_t); 702 #endif 703 #ifdef notyet 704 static struct secspacq *key_newspacq (const struct secpolicyindex *); 705 static struct secspacq *key_getspacq (const struct secpolicyindex *); 706 #endif 707 static int key_api_acquire(struct socket *, struct mbuf *, 708 const struct sadb_msghdr *); 709 static int key_api_register(struct socket *, struct mbuf *, 710 const struct sadb_msghdr *); 711 static int key_expire (struct secasvar *); 712 static int key_api_flush(struct socket *, struct mbuf *, 713 const struct sadb_msghdr *); 714 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 715 int *lenp, pid_t pid); 716 static int key_api_dump(struct socket *, struct mbuf *, 717 const struct sadb_msghdr *); 718 static int key_api_promisc(struct socket *, struct mbuf *, 719 const struct sadb_msghdr *); 720 static int key_senderror (struct socket *, struct mbuf *, int); 721 static int key_validate_ext (const struct sadb_ext *, int); 722 static int key_align (struct mbuf *, struct sadb_msghdr *); 723 #if 0 724 static const char *key_getfqdn (void); 725 static const char *key_getuserfqdn (void); 726 #endif 727 static void key_sa_chgstate (struct secasvar *, u_int8_t); 728 729 static struct mbuf *key_alloc_mbuf (int); 730 731 static void key_timehandler(void *); 732 static void key_timehandler_work(struct work *, void *); 733 static struct callout key_timehandler_ch; 734 static struct workqueue *key_timehandler_wq; 735 static struct work key_timehandler_wk; 736 737 #ifdef IPSEC_REF_DEBUG 738 #define REFLOG(label, p, where, tag) \ 739 log(LOG_DEBUG, "%s:%d: " label " : refcnt=%d (%p)\n.", \ 740 (where), (tag), (p)->refcnt, (p)) 741 #else 742 #define REFLOG(label, p, where, tag) do {} while (0) 743 #endif 744 745 #define SA_ADDREF(p) do { \ 746 atomic_inc_uint(&(p)->refcnt); \ 747 REFLOG("SA_ADDREF", (p), __func__, __LINE__); \ 748 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 749 } while (0) 750 #define SA_ADDREF2(p, where, tag) do { \ 751 atomic_inc_uint(&(p)->refcnt); \ 752 REFLOG("SA_ADDREF", (p), (where), (tag)); \ 753 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 754 } while (0) 755 #define SA_DELREF(p) do { \ 756 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 757 atomic_dec_uint(&(p)->refcnt); \ 758 REFLOG("SA_DELREF", (p), __func__, __LINE__); \ 759 } while (0) 760 #define SA_DELREF2(p, nv, where, tag) do { \ 761 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 762 nv = atomic_dec_uint_nv(&(p)->refcnt); \ 763 REFLOG("SA_DELREF", (p), (where), (tag)); \ 764 } while (0) 765 766 u_int 767 key_sp_refcnt(const struct secpolicy *sp) 768 { 769 770 /* FIXME */ 771 return 0; 772 } 773 774 /* 775 * Remove the sp from the key_spd.splist and wait for references to the sp 776 * to be released. key_spd.lock must be held. 777 */ 778 static void 779 key_unlink_sp(struct secpolicy *sp) 780 { 781 782 KASSERT(mutex_owned(&key_spd.lock)); 783 784 sp->state = IPSEC_SPSTATE_DEAD; 785 SPLIST_WRITER_REMOVE(sp); 786 787 /* Invalidate all cached SPD pointers in the PCBs. */ 788 ipsec_invalpcbcacheall(); 789 790 #ifdef NET_MPSAFE 791 KASSERT(mutex_ownable(softnet_lock)); 792 pserialize_perform(key_psz); 793 #endif 794 795 localcount_drain(&sp->localcount, &key_spd.cv, &key_spd.lock); 796 } 797 798 /* 799 * Return 0 when there are known to be no SP's for the specified 800 * direction. Otherwise return 1. This is used by IPsec code 801 * to optimize performance. 802 */ 803 int 804 key_havesp(u_int dir) 805 { 806 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 807 !SPLIST_READER_EMPTY(dir) : 1); 808 } 809 810 /* %%% IPsec policy management */ 811 /* 812 * allocating a SP for OUTBOUND or INBOUND packet. 813 * Must call key_freesp() later. 814 * OUT: NULL: not found 815 * others: found and return the pointer. 816 */ 817 struct secpolicy * 818 key_lookup_sp_byspidx(const struct secpolicyindex *spidx, 819 u_int dir, const char* where, int tag) 820 { 821 struct secpolicy *sp; 822 int s; 823 824 KASSERT(spidx != NULL); 825 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 826 827 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 828 829 /* get a SP entry */ 830 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 831 printf("*** objects\n"); 832 kdebug_secpolicyindex(spidx); 833 } 834 835 s = pserialize_read_enter(); 836 SPLIST_READER_FOREACH(sp, dir) { 837 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 838 printf("*** in SPD\n"); 839 kdebug_secpolicyindex(&sp->spidx); 840 } 841 842 if (sp->state == IPSEC_SPSTATE_DEAD) 843 continue; 844 if (key_spidx_match_withmask(&sp->spidx, spidx)) 845 goto found; 846 } 847 sp = NULL; 848 found: 849 if (sp) { 850 /* sanity check */ 851 KEY_CHKSPDIR(sp->spidx.dir, dir); 852 853 /* found a SPD entry */ 854 sp->lastused = time_uptime; 855 key_sp_ref(sp, where, tag); 856 } 857 pserialize_read_exit(s); 858 859 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 860 "DP return SP:%p (ID=%u) refcnt %u\n", 861 sp, sp ? sp->id : 0, key_sp_refcnt(sp)); 862 return sp; 863 } 864 865 /* 866 * return a policy that matches this particular inbound packet. 867 * XXX slow 868 */ 869 struct secpolicy * 870 key_gettunnel(const struct sockaddr *osrc, 871 const struct sockaddr *odst, 872 const struct sockaddr *isrc, 873 const struct sockaddr *idst, 874 const char* where, int tag) 875 { 876 struct secpolicy *sp; 877 const int dir = IPSEC_DIR_INBOUND; 878 int s; 879 struct ipsecrequest *r1, *r2, *p; 880 struct secpolicyindex spidx; 881 882 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 883 884 if (isrc->sa_family != idst->sa_family) { 885 IPSECLOG(LOG_ERR, "protocol family mismatched %d != %d\n.", 886 isrc->sa_family, idst->sa_family); 887 sp = NULL; 888 goto done; 889 } 890 891 s = pserialize_read_enter(); 892 SPLIST_READER_FOREACH(sp, dir) { 893 if (sp->state == IPSEC_SPSTATE_DEAD) 894 continue; 895 896 r1 = r2 = NULL; 897 for (p = sp->req; p; p = p->next) { 898 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 899 continue; 900 901 r1 = r2; 902 r2 = p; 903 904 if (!r1) { 905 /* here we look at address matches only */ 906 spidx = sp->spidx; 907 if (isrc->sa_len > sizeof(spidx.src) || 908 idst->sa_len > sizeof(spidx.dst)) 909 continue; 910 memcpy(&spidx.src, isrc, isrc->sa_len); 911 memcpy(&spidx.dst, idst, idst->sa_len); 912 if (!key_spidx_match_withmask(&sp->spidx, &spidx)) 913 continue; 914 } else { 915 if (!key_sockaddr_match(&r1->saidx.src.sa, isrc, PORT_NONE) || 916 !key_sockaddr_match(&r1->saidx.dst.sa, idst, PORT_NONE)) 917 continue; 918 } 919 920 if (!key_sockaddr_match(&r2->saidx.src.sa, osrc, PORT_NONE) || 921 !key_sockaddr_match(&r2->saidx.dst.sa, odst, PORT_NONE)) 922 continue; 923 924 goto found; 925 } 926 } 927 sp = NULL; 928 found: 929 if (sp) { 930 sp->lastused = time_uptime; 931 key_sp_ref(sp, where, tag); 932 } 933 pserialize_read_exit(s); 934 done: 935 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 936 "DP return SP:%p (ID=%u) refcnt %u\n", 937 sp, sp ? sp->id : 0, key_sp_refcnt(sp)); 938 return sp; 939 } 940 941 /* 942 * allocating an SA entry for an *OUTBOUND* packet. 943 * checking each request entries in SP, and acquire an SA if need. 944 * OUT: 0: there are valid requests. 945 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 946 */ 947 int 948 key_checkrequest(struct ipsecrequest *isr, struct secasvar **ret) 949 { 950 u_int level; 951 int error; 952 const struct secasindex *saidx = &isr->saidx; 953 struct secasvar *sav; 954 955 KASSERT(isr != NULL); 956 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 957 saidx->mode == IPSEC_MODE_TUNNEL, 958 "unexpected policy %u", saidx->mode); 959 960 /* get current level */ 961 level = ipsec_get_reqlevel(isr); 962 963 /* 964 * XXX guard against protocol callbacks from the crypto 965 * thread as they reference ipsecrequest.sav which we 966 * temporarily null out below. Need to rethink how we 967 * handle bundled SA's in the callback thread. 968 */ 969 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 970 971 sav = key_lookup_sa_bysaidx(saidx); 972 if (sav != NULL) { 973 *ret = sav; 974 return 0; 975 } 976 977 /* there is no SA */ 978 error = key_acquire(saidx, isr->sp); 979 if (error != 0) { 980 /* XXX What should I do ? */ 981 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 982 error); 983 return error; 984 } 985 986 if (level != IPSEC_LEVEL_REQUIRE) { 987 /* XXX sigh, the interface to this routine is botched */ 988 *ret = NULL; 989 return 0; 990 } else { 991 return ENOENT; 992 } 993 } 994 995 /* 996 * looking up a SA for policy entry from SAD. 997 * NOTE: searching SAD of aliving state. 998 * OUT: NULL: not found. 999 * others: found and return the pointer. 1000 */ 1001 static struct secasvar * 1002 key_lookup_sa_bysaidx(const struct secasindex *saidx) 1003 { 1004 struct secashead *sah; 1005 struct secasvar *sav = NULL; 1006 u_int stateidx, state; 1007 const u_int *saorder_state_valid; 1008 int arraysize; 1009 int s; 1010 1011 s = pserialize_read_enter(); 1012 sah = key_getsah(saidx, CMP_MODE_REQID); 1013 if (sah == NULL) 1014 goto out; 1015 1016 /* 1017 * search a valid state list for outbound packet. 1018 * This search order is important. 1019 */ 1020 if (key_prefered_oldsa) { 1021 saorder_state_valid = saorder_state_valid_prefer_old; 1022 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1023 } else { 1024 saorder_state_valid = saorder_state_valid_prefer_new; 1025 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1026 } 1027 1028 /* search valid state */ 1029 for (stateidx = 0; 1030 stateidx < arraysize; 1031 stateidx++) { 1032 1033 state = saorder_state_valid[stateidx]; 1034 1035 if (key_prefered_oldsa) 1036 sav = SAVLIST_READER_FIRST(sah, state); 1037 else { 1038 /* XXX need O(1) lookup */ 1039 struct secasvar *last = NULL; 1040 1041 SAVLIST_READER_FOREACH(sav, sah, state) 1042 last = sav; 1043 sav = last; 1044 } 1045 if (sav != NULL) { 1046 SA_ADDREF(sav); 1047 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1048 "DP cause refcnt++:%d SA:%p\n", 1049 sav->refcnt, sav); 1050 break; 1051 } 1052 } 1053 out: 1054 pserialize_read_exit(s); 1055 1056 return sav; 1057 } 1058 1059 #if 0 1060 static void 1061 key_sendup_message_delete(struct secasvar *sav) 1062 { 1063 struct mbuf *m, *result = 0; 1064 uint8_t satype; 1065 1066 satype = key_proto2satype(sav->sah->saidx.proto); 1067 if (satype == 0) 1068 goto msgfail; 1069 1070 m = key_setsadbmsg(SADB_DELETE, 0, satype, 0, 0, sav->refcnt - 1); 1071 if (m == NULL) 1072 goto msgfail; 1073 result = m; 1074 1075 /* set sadb_address for saidx's. */ 1076 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 1077 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 1078 if (m == NULL) 1079 goto msgfail; 1080 m_cat(result, m); 1081 1082 /* set sadb_address for saidx's. */ 1083 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.src.sa, 1084 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 1085 if (m == NULL) 1086 goto msgfail; 1087 m_cat(result, m); 1088 1089 /* create SA extension */ 1090 m = key_setsadbsa(sav); 1091 if (m == NULL) 1092 goto msgfail; 1093 m_cat(result, m); 1094 1095 if (result->m_len < sizeof(struct sadb_msg)) { 1096 result = m_pullup(result, sizeof(struct sadb_msg)); 1097 if (result == NULL) 1098 goto msgfail; 1099 } 1100 1101 result->m_pkthdr.len = 0; 1102 for (m = result; m; m = m->m_next) 1103 result->m_pkthdr.len += m->m_len; 1104 mtod(result, struct sadb_msg *)->sadb_msg_len = 1105 PFKEY_UNIT64(result->m_pkthdr.len); 1106 1107 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1108 result = NULL; 1109 msgfail: 1110 if (result) 1111 m_freem(result); 1112 } 1113 #endif 1114 1115 /* 1116 * allocating a usable SA entry for a *INBOUND* packet. 1117 * Must call key_freesav() later. 1118 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1119 * NULL: not found, or error occurred. 1120 * 1121 * In the comparison, no source address is used--for RFC2401 conformance. 1122 * To quote, from section 4.1: 1123 * A security association is uniquely identified by a triple consisting 1124 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1125 * security protocol (AH or ESP) identifier. 1126 * Note that, however, we do need to keep source address in IPsec SA. 1127 * IKE specification and PF_KEY specification do assume that we 1128 * keep source address in IPsec SA. We see a tricky situation here. 1129 * 1130 * sport and dport are used for NAT-T. network order is always used. 1131 */ 1132 struct secasvar * 1133 key_lookup_sa( 1134 const union sockaddr_union *dst, 1135 u_int proto, 1136 u_int32_t spi, 1137 u_int16_t sport, 1138 u_int16_t dport, 1139 const char* where, int tag) 1140 { 1141 struct secashead *sah; 1142 struct secasvar *sav; 1143 u_int stateidx, state; 1144 const u_int *saorder_state_valid; 1145 int arraysize, chkport; 1146 int s; 1147 1148 int must_check_spi = 1; 1149 int must_check_alg = 0; 1150 u_int16_t cpi = 0; 1151 u_int8_t algo = 0; 1152 1153 if ((sport != 0) && (dport != 0)) 1154 chkport = PORT_STRICT; 1155 else 1156 chkport = PORT_NONE; 1157 1158 KASSERT(dst != NULL); 1159 1160 /* 1161 * XXX IPCOMP case 1162 * We use cpi to define spi here. In the case where cpi <= 1163 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1164 * the real spi. In this case, don't check the spi but check the 1165 * algorithm 1166 */ 1167 1168 if (proto == IPPROTO_IPCOMP) { 1169 u_int32_t tmp; 1170 tmp = ntohl(spi); 1171 cpi = (u_int16_t) tmp; 1172 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1173 algo = (u_int8_t) cpi; 1174 must_check_spi = 0; 1175 must_check_alg = 1; 1176 } 1177 } 1178 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1179 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1180 where, tag, must_check_spi, must_check_alg); 1181 1182 1183 /* 1184 * searching SAD. 1185 * XXX: to be checked internal IP header somewhere. Also when 1186 * IPsec tunnel packet is received. But ESP tunnel mode is 1187 * encrypted so we can't check internal IP header. 1188 */ 1189 if (key_prefered_oldsa) { 1190 saorder_state_valid = saorder_state_valid_prefer_old; 1191 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1192 } else { 1193 saorder_state_valid = saorder_state_valid_prefer_new; 1194 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1195 } 1196 s = pserialize_read_enter(); 1197 SAHLIST_READER_FOREACH(sah) { 1198 /* search valid state */ 1199 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1200 state = saorder_state_valid[stateidx]; 1201 SAVLIST_READER_FOREACH(sav, sah, state) { 1202 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1203 "try match spi %#x, %#x\n", 1204 ntohl(spi), ntohl(sav->spi)); 1205 /* sanity check */ 1206 KEY_CHKSASTATE(sav->state, state); 1207 /* do not return entries w/ unusable state */ 1208 if (!SADB_SASTATE_USABLE_P(sav)) { 1209 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1210 "bad state %d\n", sav->state); 1211 continue; 1212 } 1213 if (proto != sav->sah->saidx.proto) { 1214 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1215 "proto fail %d != %d\n", 1216 proto, sav->sah->saidx.proto); 1217 continue; 1218 } 1219 if (must_check_spi && spi != sav->spi) { 1220 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1221 "spi fail %#x != %#x\n", 1222 ntohl(spi), ntohl(sav->spi)); 1223 continue; 1224 } 1225 /* XXX only on the ipcomp case */ 1226 if (must_check_alg && algo != sav->alg_comp) { 1227 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1228 "algo fail %d != %d\n", 1229 algo, sav->alg_comp); 1230 continue; 1231 } 1232 1233 #if 0 /* don't check src */ 1234 /* Fix port in src->sa */ 1235 1236 /* check src address */ 1237 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1238 continue; 1239 #endif 1240 /* fix port of dst address XXX*/ 1241 key_porttosaddr(__UNCONST(dst), dport); 1242 /* check dst address */ 1243 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1244 continue; 1245 SA_ADDREF2(sav, where, tag); 1246 goto done; 1247 } 1248 } 1249 } 1250 sav = NULL; 1251 done: 1252 pserialize_read_exit(s); 1253 1254 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1255 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1256 return sav; 1257 } 1258 1259 static void 1260 key_validate_savlist(const struct secashead *sah, const u_int state) 1261 { 1262 #ifdef DEBUG 1263 struct secasvar *sav, *next; 1264 int s; 1265 1266 /* 1267 * The list should be sorted by lft_c->sadb_lifetime_addtime 1268 * in ascending order. 1269 */ 1270 s = pserialize_read_enter(); 1271 SAVLIST_READER_FOREACH(sav, sah, state) { 1272 next = SAVLIST_READER_NEXT(sav); 1273 if (next != NULL && 1274 sav->lft_c != NULL && next->lft_c != NULL) { 1275 KDASSERTMSG(sav->lft_c->sadb_lifetime_addtime <= 1276 next->lft_c->sadb_lifetime_addtime, 1277 "savlist is not sorted: sah=%p, state=%d, " 1278 "sav=%" PRIu64 ", next=%" PRIu64, sah, state, 1279 sav->lft_c->sadb_lifetime_addtime, 1280 next->lft_c->sadb_lifetime_addtime); 1281 } 1282 } 1283 pserialize_read_exit(s); 1284 #endif 1285 } 1286 1287 void 1288 key_init_sp(struct secpolicy *sp) 1289 { 1290 1291 ASSERT_SLEEPABLE(); 1292 1293 sp->state = IPSEC_SPSTATE_ALIVE; 1294 if (sp->policy == IPSEC_POLICY_IPSEC) 1295 KASSERT(sp->req != NULL); 1296 localcount_init(&sp->localcount); 1297 SPLIST_ENTRY_INIT(sp); 1298 } 1299 1300 void 1301 key_sp_ref(struct secpolicy *sp, const char* where, int tag) 1302 { 1303 1304 localcount_acquire(&sp->localcount); 1305 1306 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1307 "DP SP:%p (ID=%u) from %s:%u; refcnt++ now %u\n", 1308 sp, sp->id, where, tag, key_sp_refcnt(sp)); 1309 } 1310 1311 void 1312 key_sp_unref(struct secpolicy *sp, const char* where, int tag) 1313 { 1314 1315 KDASSERT(mutex_ownable(&key_spd.lock)); 1316 1317 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1318 "DP SP:%p (ID=%u) from %s:%u; refcnt-- now %u\n", 1319 sp, sp->id, where, tag, key_sp_refcnt(sp)); 1320 1321 localcount_release(&sp->localcount, &key_spd.cv, &key_spd.lock); 1322 } 1323 1324 void 1325 key_sa_ref(struct secasvar *sav, const char* where, int tag) 1326 { 1327 1328 SA_ADDREF2(sav, where, tag); 1329 1330 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1331 "DP cause refcnt++:%d SA:%p from %s:%u\n", 1332 sav->refcnt, sav, where, tag); 1333 } 1334 1335 #if 0 1336 /* 1337 * Must be called after calling key_lookup_sp*(). 1338 * For the packet with socket. 1339 */ 1340 static void 1341 key_freeso(struct socket *so) 1342 { 1343 /* sanity check */ 1344 KASSERT(so != NULL); 1345 1346 switch (so->so_proto->pr_domain->dom_family) { 1347 #ifdef INET 1348 case PF_INET: 1349 { 1350 struct inpcb *pcb = sotoinpcb(so); 1351 1352 /* Does it have a PCB ? */ 1353 if (pcb == NULL) 1354 return; 1355 1356 struct inpcbpolicy *sp = pcb->inp_sp; 1357 key_freesp_so(&sp->sp_in); 1358 key_freesp_so(&sp->sp_out); 1359 } 1360 break; 1361 #endif 1362 #ifdef INET6 1363 case PF_INET6: 1364 { 1365 #ifdef HAVE_NRL_INPCB 1366 struct inpcb *pcb = sotoinpcb(so); 1367 struct inpcbpolicy *sp = pcb->inp_sp; 1368 1369 /* Does it have a PCB ? */ 1370 if (pcb == NULL) 1371 return; 1372 key_freesp_so(&sp->sp_in); 1373 key_freesp_so(&sp->sp_out); 1374 #else 1375 struct in6pcb *pcb = sotoin6pcb(so); 1376 1377 /* Does it have a PCB ? */ 1378 if (pcb == NULL) 1379 return; 1380 key_freesp_so(&pcb->in6p_sp->sp_in); 1381 key_freesp_so(&pcb->in6p_sp->sp_out); 1382 #endif 1383 } 1384 break; 1385 #endif /* INET6 */ 1386 default: 1387 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1388 so->so_proto->pr_domain->dom_family); 1389 return; 1390 } 1391 } 1392 1393 static void 1394 key_freesp_so(struct secpolicy **sp) 1395 { 1396 1397 KASSERT(sp != NULL); 1398 KASSERT(*sp != NULL); 1399 1400 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1401 (*sp)->policy == IPSEC_POLICY_BYPASS) 1402 return; 1403 1404 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1405 "invalid policy %u", (*sp)->policy); 1406 KEY_SP_UNREF(&sp); 1407 } 1408 #endif 1409 1410 /* 1411 * Must be called after calling key_lookup_sa(). 1412 * This function is called by key_freesp() to free some SA allocated 1413 * for a policy. 1414 */ 1415 void 1416 key_freesav(struct secasvar **psav, const char* where, int tag) 1417 { 1418 struct secasvar *sav = *psav; 1419 unsigned int nv; 1420 1421 KASSERT(sav != NULL); 1422 1423 SA_DELREF2(sav, nv, where, tag); 1424 1425 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1426 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1427 sav, (u_long)ntohl(sav->spi), where, tag, nv); 1428 1429 if (nv == 0) { 1430 *psav = NULL; 1431 1432 /* remove from SA header */ 1433 SAVLIST_WRITER_REMOVE(sav); 1434 1435 key_delsav(sav); 1436 } 1437 } 1438 1439 /* %%% SPD management */ 1440 /* 1441 * free security policy entry. 1442 */ 1443 static void 1444 key_destroy_sp(struct secpolicy *sp) 1445 { 1446 1447 SPLIST_ENTRY_DESTROY(sp); 1448 localcount_fini(&sp->localcount); 1449 1450 key_free_sp(sp); 1451 1452 key_update_used(); 1453 } 1454 1455 void 1456 key_free_sp(struct secpolicy *sp) 1457 { 1458 struct ipsecrequest *isr = sp->req, *nextisr; 1459 1460 while (isr != NULL) { 1461 nextisr = isr->next; 1462 kmem_free(isr, sizeof(*isr)); 1463 isr = nextisr; 1464 } 1465 1466 kmem_free(sp, sizeof(*sp)); 1467 } 1468 1469 void 1470 key_socksplist_add(struct secpolicy *sp) 1471 { 1472 1473 mutex_enter(&key_spd.lock); 1474 PSLIST_WRITER_INSERT_HEAD(&key_spd.socksplist, sp, pslist_entry); 1475 mutex_exit(&key_spd.lock); 1476 1477 key_update_used(); 1478 } 1479 1480 /* 1481 * search SPD 1482 * OUT: NULL : not found 1483 * others : found, pointer to a SP. 1484 */ 1485 static struct secpolicy * 1486 key_getsp(const struct secpolicyindex *spidx) 1487 { 1488 struct secpolicy *sp; 1489 int s; 1490 1491 KASSERT(spidx != NULL); 1492 1493 s = pserialize_read_enter(); 1494 SPLIST_READER_FOREACH(sp, spidx->dir) { 1495 if (sp->state == IPSEC_SPSTATE_DEAD) 1496 continue; 1497 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1498 KEY_SP_REF(sp); 1499 pserialize_read_exit(s); 1500 return sp; 1501 } 1502 } 1503 pserialize_read_exit(s); 1504 1505 return NULL; 1506 } 1507 1508 /* 1509 * search SPD and remove found SP 1510 * OUT: NULL : not found 1511 * others : found, pointer to a SP. 1512 */ 1513 static struct secpolicy * 1514 key_lookup_and_remove_sp(const struct secpolicyindex *spidx) 1515 { 1516 struct secpolicy *sp = NULL; 1517 1518 mutex_enter(&key_spd.lock); 1519 SPLIST_WRITER_FOREACH(sp, spidx->dir) { 1520 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1521 1522 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1523 key_unlink_sp(sp); 1524 goto out; 1525 } 1526 } 1527 sp = NULL; 1528 out: 1529 mutex_exit(&key_spd.lock); 1530 1531 return sp; 1532 } 1533 1534 /* 1535 * get SP by index. 1536 * OUT: NULL : not found 1537 * others : found, pointer to a SP. 1538 */ 1539 static struct secpolicy * 1540 key_getspbyid(u_int32_t id) 1541 { 1542 struct secpolicy *sp; 1543 int s; 1544 1545 s = pserialize_read_enter(); 1546 SPLIST_READER_FOREACH(sp, IPSEC_DIR_INBOUND) { 1547 if (sp->state == IPSEC_SPSTATE_DEAD) 1548 continue; 1549 if (sp->id == id) { 1550 KEY_SP_REF(sp); 1551 goto out; 1552 } 1553 } 1554 1555 SPLIST_READER_FOREACH(sp, IPSEC_DIR_OUTBOUND) { 1556 if (sp->state == IPSEC_SPSTATE_DEAD) 1557 continue; 1558 if (sp->id == id) { 1559 KEY_SP_REF(sp); 1560 goto out; 1561 } 1562 } 1563 out: 1564 pserialize_read_exit(s); 1565 return sp; 1566 } 1567 1568 /* 1569 * get SP by index, remove and return it. 1570 * OUT: NULL : not found 1571 * others : found, pointer to a SP. 1572 */ 1573 static struct secpolicy * 1574 key_lookupbyid_and_remove_sp(u_int32_t id) 1575 { 1576 struct secpolicy *sp; 1577 1578 mutex_enter(&key_spd.lock); 1579 SPLIST_READER_FOREACH(sp, IPSEC_DIR_INBOUND) { 1580 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1581 if (sp->id == id) 1582 goto out; 1583 } 1584 1585 SPLIST_READER_FOREACH(sp, IPSEC_DIR_OUTBOUND) { 1586 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1587 if (sp->id == id) 1588 goto out; 1589 } 1590 out: 1591 if (sp != NULL) 1592 key_unlink_sp(sp); 1593 mutex_exit(&key_spd.lock); 1594 return sp; 1595 } 1596 1597 struct secpolicy * 1598 key_newsp(const char* where, int tag) 1599 { 1600 struct secpolicy *newsp = NULL; 1601 1602 newsp = kmem_zalloc(sizeof(struct secpolicy), KM_SLEEP); 1603 1604 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1605 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1606 return newsp; 1607 } 1608 1609 /* 1610 * create secpolicy structure from sadb_x_policy structure. 1611 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1612 * so must be set properly later. 1613 */ 1614 struct secpolicy * 1615 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1616 { 1617 struct secpolicy *newsp; 1618 1619 KASSERT(!cpu_softintr_p()); 1620 KASSERT(xpl0 != NULL); 1621 KASSERT(len >= sizeof(*xpl0)); 1622 1623 if (len != PFKEY_EXTLEN(xpl0)) { 1624 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1625 *error = EINVAL; 1626 return NULL; 1627 } 1628 1629 newsp = KEY_NEWSP(); 1630 if (newsp == NULL) { 1631 *error = ENOBUFS; 1632 return NULL; 1633 } 1634 1635 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1636 newsp->policy = xpl0->sadb_x_policy_type; 1637 1638 /* check policy */ 1639 switch (xpl0->sadb_x_policy_type) { 1640 case IPSEC_POLICY_DISCARD: 1641 case IPSEC_POLICY_NONE: 1642 case IPSEC_POLICY_ENTRUST: 1643 case IPSEC_POLICY_BYPASS: 1644 newsp->req = NULL; 1645 *error = 0; 1646 return newsp; 1647 1648 case IPSEC_POLICY_IPSEC: 1649 /* Continued */ 1650 break; 1651 default: 1652 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1653 key_free_sp(newsp); 1654 *error = EINVAL; 1655 return NULL; 1656 } 1657 1658 /* IPSEC_POLICY_IPSEC */ 1659 { 1660 int tlen; 1661 const struct sadb_x_ipsecrequest *xisr; 1662 uint16_t xisr_reqid; 1663 struct ipsecrequest **p_isr = &newsp->req; 1664 1665 /* validity check */ 1666 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1667 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1668 *error = EINVAL; 1669 goto free_exit; 1670 } 1671 1672 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1673 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1674 1675 while (tlen > 0) { 1676 /* length check */ 1677 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1678 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1679 *error = EINVAL; 1680 goto free_exit; 1681 } 1682 1683 /* allocate request buffer */ 1684 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1685 1686 /* set values */ 1687 (*p_isr)->next = NULL; 1688 1689 switch (xisr->sadb_x_ipsecrequest_proto) { 1690 case IPPROTO_ESP: 1691 case IPPROTO_AH: 1692 case IPPROTO_IPCOMP: 1693 break; 1694 default: 1695 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1696 xisr->sadb_x_ipsecrequest_proto); 1697 *error = EPROTONOSUPPORT; 1698 goto free_exit; 1699 } 1700 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1701 1702 switch (xisr->sadb_x_ipsecrequest_mode) { 1703 case IPSEC_MODE_TRANSPORT: 1704 case IPSEC_MODE_TUNNEL: 1705 break; 1706 case IPSEC_MODE_ANY: 1707 default: 1708 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1709 xisr->sadb_x_ipsecrequest_mode); 1710 *error = EINVAL; 1711 goto free_exit; 1712 } 1713 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1714 1715 switch (xisr->sadb_x_ipsecrequest_level) { 1716 case IPSEC_LEVEL_DEFAULT: 1717 case IPSEC_LEVEL_USE: 1718 case IPSEC_LEVEL_REQUIRE: 1719 break; 1720 case IPSEC_LEVEL_UNIQUE: 1721 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1722 /* validity check */ 1723 /* 1724 * If range violation of reqid, kernel will 1725 * update it, don't refuse it. 1726 */ 1727 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1728 IPSECLOG(LOG_DEBUG, 1729 "reqid=%d range " 1730 "violation, updated by kernel.\n", 1731 xisr_reqid); 1732 xisr_reqid = 0; 1733 } 1734 1735 /* allocate new reqid id if reqid is zero. */ 1736 if (xisr_reqid == 0) { 1737 u_int16_t reqid = key_newreqid(); 1738 if (reqid == 0) { 1739 *error = ENOBUFS; 1740 goto free_exit; 1741 } 1742 (*p_isr)->saidx.reqid = reqid; 1743 } else { 1744 /* set it for manual keying. */ 1745 (*p_isr)->saidx.reqid = xisr_reqid; 1746 } 1747 break; 1748 1749 default: 1750 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1751 xisr->sadb_x_ipsecrequest_level); 1752 *error = EINVAL; 1753 goto free_exit; 1754 } 1755 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1756 1757 /* set IP addresses if there */ 1758 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1759 const struct sockaddr *paddr; 1760 1761 paddr = (const struct sockaddr *)(xisr + 1); 1762 1763 /* validity check */ 1764 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1765 IPSECLOG(LOG_DEBUG, "invalid request " 1766 "address length.\n"); 1767 *error = EINVAL; 1768 goto free_exit; 1769 } 1770 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1771 1772 paddr = (const struct sockaddr *)((const char *)paddr 1773 + paddr->sa_len); 1774 1775 /* validity check */ 1776 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1777 IPSECLOG(LOG_DEBUG, "invalid request " 1778 "address length.\n"); 1779 *error = EINVAL; 1780 goto free_exit; 1781 } 1782 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1783 } 1784 1785 (*p_isr)->sp = newsp; 1786 1787 /* initialization for the next. */ 1788 p_isr = &(*p_isr)->next; 1789 tlen -= xisr->sadb_x_ipsecrequest_len; 1790 1791 /* validity check */ 1792 if (tlen < 0) { 1793 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 1794 *error = EINVAL; 1795 goto free_exit; 1796 } 1797 1798 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 1799 xisr->sadb_x_ipsecrequest_len); 1800 } 1801 } 1802 1803 *error = 0; 1804 return newsp; 1805 1806 free_exit: 1807 key_free_sp(newsp); 1808 return NULL; 1809 } 1810 1811 static u_int16_t 1812 key_newreqid(void) 1813 { 1814 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1815 1816 auto_reqid = (auto_reqid == 0xffff ? 1817 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1818 1819 /* XXX should be unique check */ 1820 1821 return auto_reqid; 1822 } 1823 1824 /* 1825 * copy secpolicy struct to sadb_x_policy structure indicated. 1826 */ 1827 struct mbuf * 1828 key_sp2msg(const struct secpolicy *sp) 1829 { 1830 struct sadb_x_policy *xpl; 1831 int tlen; 1832 char *p; 1833 struct mbuf *m; 1834 1835 KASSERT(sp != NULL); 1836 1837 tlen = key_getspreqmsglen(sp); 1838 1839 m = key_alloc_mbuf(tlen); 1840 if (!m || m->m_next) { /*XXX*/ 1841 if (m) 1842 m_freem(m); 1843 return NULL; 1844 } 1845 1846 m->m_len = tlen; 1847 m->m_next = NULL; 1848 xpl = mtod(m, struct sadb_x_policy *); 1849 memset(xpl, 0, tlen); 1850 1851 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1852 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1853 xpl->sadb_x_policy_type = sp->policy; 1854 xpl->sadb_x_policy_dir = sp->spidx.dir; 1855 xpl->sadb_x_policy_id = sp->id; 1856 p = (char *)xpl + sizeof(*xpl); 1857 1858 /* if is the policy for ipsec ? */ 1859 if (sp->policy == IPSEC_POLICY_IPSEC) { 1860 struct sadb_x_ipsecrequest *xisr; 1861 struct ipsecrequest *isr; 1862 1863 for (isr = sp->req; isr != NULL; isr = isr->next) { 1864 1865 xisr = (struct sadb_x_ipsecrequest *)p; 1866 1867 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1868 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1869 xisr->sadb_x_ipsecrequest_level = isr->level; 1870 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1871 1872 p += sizeof(*xisr); 1873 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1874 p += isr->saidx.src.sa.sa_len; 1875 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1876 p += isr->saidx.src.sa.sa_len; 1877 1878 xisr->sadb_x_ipsecrequest_len = 1879 PFKEY_ALIGN8(sizeof(*xisr) 1880 + isr->saidx.src.sa.sa_len 1881 + isr->saidx.dst.sa.sa_len); 1882 } 1883 } 1884 1885 return m; 1886 } 1887 1888 /* m will not be freed nor modified */ 1889 static struct mbuf * 1890 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1891 int ndeep, int nitem, ...) 1892 { 1893 va_list ap; 1894 int idx; 1895 int i; 1896 struct mbuf *result = NULL, *n; 1897 int len; 1898 1899 KASSERT(m != NULL); 1900 KASSERT(mhp != NULL); 1901 1902 va_start(ap, nitem); 1903 for (i = 0; i < nitem; i++) { 1904 idx = va_arg(ap, int); 1905 if (idx < 0 || idx > SADB_EXT_MAX) 1906 goto fail; 1907 /* don't attempt to pull empty extension */ 1908 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1909 continue; 1910 if (idx != SADB_EXT_RESERVED && 1911 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1912 continue; 1913 1914 if (idx == SADB_EXT_RESERVED) { 1915 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1916 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1917 MGETHDR(n, M_DONTWAIT, MT_DATA); 1918 if (!n) 1919 goto fail; 1920 n->m_len = len; 1921 n->m_next = NULL; 1922 m_copydata(m, 0, sizeof(struct sadb_msg), 1923 mtod(n, void *)); 1924 } else if (i < ndeep) { 1925 len = mhp->extlen[idx]; 1926 n = key_alloc_mbuf(len); 1927 if (!n || n->m_next) { /*XXX*/ 1928 if (n) 1929 m_freem(n); 1930 goto fail; 1931 } 1932 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1933 mtod(n, void *)); 1934 } else { 1935 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1936 M_DONTWAIT); 1937 } 1938 if (n == NULL) 1939 goto fail; 1940 1941 if (result) 1942 m_cat(result, n); 1943 else 1944 result = n; 1945 } 1946 va_end(ap); 1947 1948 if (result && (result->m_flags & M_PKTHDR) != 0) { 1949 result->m_pkthdr.len = 0; 1950 for (n = result; n; n = n->m_next) 1951 result->m_pkthdr.len += n->m_len; 1952 } 1953 1954 return result; 1955 1956 fail: 1957 va_end(ap); 1958 m_freem(result); 1959 return NULL; 1960 } 1961 1962 /* 1963 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1964 * add an entry to SP database, when received 1965 * <base, address(SD), (lifetime(H),) policy> 1966 * from the user(?). 1967 * Adding to SP database, 1968 * and send 1969 * <base, address(SD), (lifetime(H),) policy> 1970 * to the socket which was send. 1971 * 1972 * SPDADD set a unique policy entry. 1973 * SPDSETIDX like SPDADD without a part of policy requests. 1974 * SPDUPDATE replace a unique policy entry. 1975 * 1976 * m will always be freed. 1977 */ 1978 static int 1979 key_api_spdadd(struct socket *so, struct mbuf *m, 1980 const struct sadb_msghdr *mhp) 1981 { 1982 const struct sockaddr *src, *dst; 1983 const struct sadb_x_policy *xpl0; 1984 struct sadb_x_policy *xpl; 1985 const struct sadb_lifetime *lft = NULL; 1986 struct secpolicyindex spidx; 1987 struct secpolicy *newsp; 1988 int error; 1989 1990 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 1991 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 1992 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 1993 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 1994 return key_senderror(so, m, EINVAL); 1995 } 1996 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 1997 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 1998 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 1999 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2000 return key_senderror(so, m, EINVAL); 2001 } 2002 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 2003 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 2004 sizeof(struct sadb_lifetime)) { 2005 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2006 return key_senderror(so, m, EINVAL); 2007 } 2008 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 2009 } 2010 2011 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2012 2013 /* checking the direciton. */ 2014 switch (xpl0->sadb_x_policy_dir) { 2015 case IPSEC_DIR_INBOUND: 2016 case IPSEC_DIR_OUTBOUND: 2017 break; 2018 default: 2019 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2020 return key_senderror(so, m, EINVAL); 2021 } 2022 2023 /* check policy */ 2024 /* key_api_spdadd() accepts DISCARD, NONE and IPSEC. */ 2025 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 2026 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 2027 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 2028 return key_senderror(so, m, EINVAL); 2029 } 2030 2031 /* policy requests are mandatory when action is ipsec. */ 2032 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 2033 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 2034 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 2035 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 2036 return key_senderror(so, m, EINVAL); 2037 } 2038 2039 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 2040 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 2041 2042 /* sanity check on addr pair */ 2043 if (src->sa_family != dst->sa_family) 2044 return key_senderror(so, m, EINVAL); 2045 if (src->sa_len != dst->sa_len) 2046 return key_senderror(so, m, EINVAL); 2047 2048 key_init_spidx_bymsghdr(&spidx, mhp); 2049 2050 /* 2051 * checking there is SP already or not. 2052 * SPDUPDATE doesn't depend on whether there is a SP or not. 2053 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 2054 * then error. 2055 */ 2056 { 2057 struct secpolicy *sp; 2058 2059 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 2060 sp = key_lookup_and_remove_sp(&spidx); 2061 if (sp != NULL) 2062 key_destroy_sp(sp); 2063 } else { 2064 sp = key_getsp(&spidx); 2065 if (sp != NULL) { 2066 KEY_SP_UNREF(&sp); 2067 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 2068 return key_senderror(so, m, EEXIST); 2069 } 2070 } 2071 } 2072 2073 /* allocation new SP entry */ 2074 newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error); 2075 if (newsp == NULL) { 2076 return key_senderror(so, m, error); 2077 } 2078 2079 newsp->id = key_getnewspid(); 2080 if (newsp->id == 0) { 2081 kmem_free(newsp, sizeof(*newsp)); 2082 return key_senderror(so, m, ENOBUFS); 2083 } 2084 2085 newsp->spidx = spidx; 2086 newsp->created = time_uptime; 2087 newsp->lastused = newsp->created; 2088 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 2089 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 2090 2091 key_init_sp(newsp); 2092 2093 mutex_enter(&key_spd.lock); 2094 SPLIST_WRITER_INSERT_TAIL(newsp->spidx.dir, newsp); 2095 mutex_exit(&key_spd.lock); 2096 2097 #ifdef notyet 2098 /* delete the entry in key_misc.spacqlist */ 2099 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 2100 struct secspacq *spacq = key_getspacq(&spidx); 2101 if (spacq != NULL) { 2102 /* reset counter in order to deletion by timehandler. */ 2103 spacq->created = time_uptime; 2104 spacq->count = 0; 2105 } 2106 } 2107 #endif 2108 2109 /* Invalidate all cached SPD pointers in the PCBs. */ 2110 ipsec_invalpcbcacheall(); 2111 2112 #if defined(GATEWAY) 2113 /* Invalidate the ipflow cache, as well. */ 2114 ipflow_invalidate_all(0); 2115 #ifdef INET6 2116 if (in6_present) 2117 ip6flow_invalidate_all(0); 2118 #endif /* INET6 */ 2119 #endif /* GATEWAY */ 2120 2121 key_update_used(); 2122 2123 { 2124 struct mbuf *n, *mpolicy; 2125 int off; 2126 2127 /* create new sadb_msg to reply. */ 2128 if (lft) { 2129 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2130 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2131 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2132 } else { 2133 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2134 SADB_X_EXT_POLICY, 2135 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2136 } 2137 if (!n) 2138 return key_senderror(so, m, ENOBUFS); 2139 2140 n = key_fill_replymsg(n, 0); 2141 if (n == NULL) 2142 return key_senderror(so, m, ENOBUFS); 2143 2144 off = 0; 2145 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2146 sizeof(*xpl), &off); 2147 if (mpolicy == NULL) { 2148 /* n is already freed */ 2149 return key_senderror(so, m, ENOBUFS); 2150 } 2151 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2152 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2153 m_freem(n); 2154 return key_senderror(so, m, EINVAL); 2155 } 2156 xpl->sadb_x_policy_id = newsp->id; 2157 2158 m_freem(m); 2159 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2160 } 2161 } 2162 2163 /* 2164 * get new policy id. 2165 * OUT: 2166 * 0: failure. 2167 * others: success. 2168 */ 2169 static u_int32_t 2170 key_getnewspid(void) 2171 { 2172 u_int32_t newid = 0; 2173 int count = key_spi_trycnt; /* XXX */ 2174 struct secpolicy *sp; 2175 2176 /* when requesting to allocate spi ranged */ 2177 while (count--) { 2178 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2179 2180 sp = key_getspbyid(newid); 2181 if (sp == NULL) 2182 break; 2183 2184 KEY_SP_UNREF(&sp); 2185 } 2186 2187 if (count == 0 || newid == 0) { 2188 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2189 return 0; 2190 } 2191 2192 return newid; 2193 } 2194 2195 /* 2196 * SADB_SPDDELETE processing 2197 * receive 2198 * <base, address(SD), policy(*)> 2199 * from the user(?), and set SADB_SASTATE_DEAD, 2200 * and send, 2201 * <base, address(SD), policy(*)> 2202 * to the ikmpd. 2203 * policy(*) including direction of policy. 2204 * 2205 * m will always be freed. 2206 */ 2207 static int 2208 key_api_spddelete(struct socket *so, struct mbuf *m, 2209 const struct sadb_msghdr *mhp) 2210 { 2211 struct sadb_x_policy *xpl0; 2212 struct secpolicyindex spidx; 2213 struct secpolicy *sp; 2214 2215 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2216 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2217 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2218 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2219 return key_senderror(so, m, EINVAL); 2220 } 2221 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2222 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2223 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2224 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2225 return key_senderror(so, m, EINVAL); 2226 } 2227 2228 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2229 2230 /* checking the direciton. */ 2231 switch (xpl0->sadb_x_policy_dir) { 2232 case IPSEC_DIR_INBOUND: 2233 case IPSEC_DIR_OUTBOUND: 2234 break; 2235 default: 2236 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2237 return key_senderror(so, m, EINVAL); 2238 } 2239 2240 /* make secindex */ 2241 key_init_spidx_bymsghdr(&spidx, mhp); 2242 2243 /* Is there SP in SPD ? */ 2244 sp = key_lookup_and_remove_sp(&spidx); 2245 if (sp == NULL) { 2246 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2247 return key_senderror(so, m, EINVAL); 2248 } 2249 2250 /* save policy id to buffer to be returned. */ 2251 xpl0->sadb_x_policy_id = sp->id; 2252 2253 key_destroy_sp(sp); 2254 2255 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2256 2257 { 2258 struct mbuf *n; 2259 2260 /* create new sadb_msg to reply. */ 2261 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2262 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2263 if (!n) 2264 return key_senderror(so, m, ENOBUFS); 2265 2266 n = key_fill_replymsg(n, 0); 2267 if (n == NULL) 2268 return key_senderror(so, m, ENOBUFS); 2269 2270 m_freem(m); 2271 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2272 } 2273 } 2274 2275 /* 2276 * SADB_SPDDELETE2 processing 2277 * receive 2278 * <base, policy(*)> 2279 * from the user(?), and set SADB_SASTATE_DEAD, 2280 * and send, 2281 * <base, policy(*)> 2282 * to the ikmpd. 2283 * policy(*) including direction of policy. 2284 * 2285 * m will always be freed. 2286 */ 2287 static int 2288 key_api_spddelete2(struct socket *so, struct mbuf *m, 2289 const struct sadb_msghdr *mhp) 2290 { 2291 u_int32_t id; 2292 struct secpolicy *sp; 2293 2294 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2295 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2296 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2297 return key_senderror(so, m, EINVAL); 2298 } 2299 2300 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2301 2302 /* Is there SP in SPD ? */ 2303 sp = key_lookupbyid_and_remove_sp(id); 2304 if (sp == NULL) { 2305 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2306 return key_senderror(so, m, EINVAL); 2307 } 2308 2309 key_destroy_sp(sp); 2310 2311 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2312 2313 { 2314 struct mbuf *n, *nn; 2315 int off, len; 2316 2317 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 2318 2319 /* create new sadb_msg to reply. */ 2320 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2321 2322 MGETHDR(n, M_DONTWAIT, MT_DATA); 2323 if (n && len > MHLEN) { 2324 MCLGET(n, M_DONTWAIT); 2325 if ((n->m_flags & M_EXT) == 0) { 2326 m_freem(n); 2327 n = NULL; 2328 } 2329 } 2330 if (!n) 2331 return key_senderror(so, m, ENOBUFS); 2332 2333 n->m_len = len; 2334 n->m_next = NULL; 2335 off = 0; 2336 2337 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2338 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2339 2340 KASSERTMSG(off == len, "length inconsistency"); 2341 2342 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2343 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2344 if (!n->m_next) { 2345 m_freem(n); 2346 return key_senderror(so, m, ENOBUFS); 2347 } 2348 2349 n->m_pkthdr.len = 0; 2350 for (nn = n; nn; nn = nn->m_next) 2351 n->m_pkthdr.len += nn->m_len; 2352 2353 n = key_fill_replymsg(n, 0); 2354 if (n == NULL) 2355 return key_senderror(so, m, ENOBUFS); 2356 2357 m_freem(m); 2358 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2359 } 2360 } 2361 2362 /* 2363 * SADB_X_GET processing 2364 * receive 2365 * <base, policy(*)> 2366 * from the user(?), 2367 * and send, 2368 * <base, address(SD), policy> 2369 * to the ikmpd. 2370 * policy(*) including direction of policy. 2371 * 2372 * m will always be freed. 2373 */ 2374 static int 2375 key_api_spdget(struct socket *so, struct mbuf *m, 2376 const struct sadb_msghdr *mhp) 2377 { 2378 u_int32_t id; 2379 struct secpolicy *sp; 2380 struct mbuf *n; 2381 2382 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2383 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2384 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2385 return key_senderror(so, m, EINVAL); 2386 } 2387 2388 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2389 2390 /* Is there SP in SPD ? */ 2391 sp = key_getspbyid(id); 2392 if (sp == NULL) { 2393 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2394 return key_senderror(so, m, ENOENT); 2395 } 2396 2397 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2398 mhp->msg->sadb_msg_pid); 2399 KEY_SP_UNREF(&sp); /* ref gained by key_getspbyid */ 2400 if (n != NULL) { 2401 m_freem(m); 2402 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2403 } else 2404 return key_senderror(so, m, ENOBUFS); 2405 } 2406 2407 #ifdef notyet 2408 /* 2409 * SADB_X_SPDACQUIRE processing. 2410 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2411 * send 2412 * <base, policy(*)> 2413 * to KMD, and expect to receive 2414 * <base> with SADB_X_SPDACQUIRE if error occurred, 2415 * or 2416 * <base, policy> 2417 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2418 * policy(*) is without policy requests. 2419 * 2420 * 0 : succeed 2421 * others: error number 2422 */ 2423 int 2424 key_spdacquire(const struct secpolicy *sp) 2425 { 2426 struct mbuf *result = NULL, *m; 2427 struct secspacq *newspacq; 2428 int error; 2429 2430 KASSERT(sp != NULL); 2431 KASSERTMSG(sp->req == NULL, "called but there is request"); 2432 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2433 "policy mismathed. IPsec is expected"); 2434 2435 /* Get an entry to check whether sent message or not. */ 2436 newspacq = key_getspacq(&sp->spidx); 2437 if (newspacq != NULL) { 2438 if (key_blockacq_count < newspacq->count) { 2439 /* reset counter and do send message. */ 2440 newspacq->count = 0; 2441 } else { 2442 /* increment counter and do nothing. */ 2443 newspacq->count++; 2444 return 0; 2445 } 2446 } else { 2447 /* make new entry for blocking to send SADB_ACQUIRE. */ 2448 newspacq = key_newspacq(&sp->spidx); 2449 if (newspacq == NULL) 2450 return ENOBUFS; 2451 2452 /* add to key_misc.acqlist */ 2453 LIST_INSERT_HEAD(&key_misc.spacqlist, newspacq, chain); 2454 } 2455 2456 /* create new sadb_msg to reply. */ 2457 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2458 if (!m) { 2459 error = ENOBUFS; 2460 goto fail; 2461 } 2462 result = m; 2463 2464 result->m_pkthdr.len = 0; 2465 for (m = result; m; m = m->m_next) 2466 result->m_pkthdr.len += m->m_len; 2467 2468 mtod(result, struct sadb_msg *)->sadb_msg_len = 2469 PFKEY_UNIT64(result->m_pkthdr.len); 2470 2471 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2472 2473 fail: 2474 if (result) 2475 m_freem(result); 2476 return error; 2477 } 2478 #endif /* notyet */ 2479 2480 /* 2481 * SADB_SPDFLUSH processing 2482 * receive 2483 * <base> 2484 * from the user, and free all entries in secpctree. 2485 * and send, 2486 * <base> 2487 * to the user. 2488 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2489 * 2490 * m will always be freed. 2491 */ 2492 static int 2493 key_api_spdflush(struct socket *so, struct mbuf *m, 2494 const struct sadb_msghdr *mhp) 2495 { 2496 struct sadb_msg *newmsg; 2497 struct secpolicy *sp; 2498 u_int dir; 2499 2500 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2501 return key_senderror(so, m, EINVAL); 2502 2503 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2504 retry: 2505 mutex_enter(&key_spd.lock); 2506 SPLIST_WRITER_FOREACH(sp, dir) { 2507 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 2508 key_unlink_sp(sp); 2509 mutex_exit(&key_spd.lock); 2510 key_destroy_sp(sp); 2511 goto retry; 2512 } 2513 mutex_exit(&key_spd.lock); 2514 } 2515 2516 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2517 2518 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2519 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2520 return key_senderror(so, m, ENOBUFS); 2521 } 2522 2523 if (m->m_next) 2524 m_freem(m->m_next); 2525 m->m_next = NULL; 2526 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2527 newmsg = mtod(m, struct sadb_msg *); 2528 newmsg->sadb_msg_errno = 0; 2529 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2530 2531 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2532 } 2533 2534 static struct sockaddr key_src = { 2535 .sa_len = 2, 2536 .sa_family = PF_KEY, 2537 }; 2538 2539 static struct mbuf * 2540 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2541 { 2542 struct secpolicy *sp; 2543 int cnt; 2544 u_int dir; 2545 struct mbuf *m, *n, *prev; 2546 int totlen; 2547 2548 KASSERT(mutex_owned(&key_spd.lock)); 2549 2550 *lenp = 0; 2551 2552 /* search SPD entry and get buffer size. */ 2553 cnt = 0; 2554 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2555 SPLIST_WRITER_FOREACH(sp, dir) { 2556 cnt++; 2557 } 2558 } 2559 2560 if (cnt == 0) { 2561 *errorp = ENOENT; 2562 return (NULL); 2563 } 2564 2565 m = NULL; 2566 prev = m; 2567 totlen = 0; 2568 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2569 SPLIST_WRITER_FOREACH(sp, dir) { 2570 --cnt; 2571 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2572 2573 if (!n) { 2574 *errorp = ENOBUFS; 2575 if (m) 2576 m_freem(m); 2577 return (NULL); 2578 } 2579 2580 totlen += n->m_pkthdr.len; 2581 if (!m) { 2582 m = n; 2583 } else { 2584 prev->m_nextpkt = n; 2585 } 2586 prev = n; 2587 } 2588 } 2589 2590 *lenp = totlen; 2591 *errorp = 0; 2592 return (m); 2593 } 2594 2595 /* 2596 * SADB_SPDDUMP processing 2597 * receive 2598 * <base> 2599 * from the user, and dump all SP leaves 2600 * and send, 2601 * <base> ..... 2602 * to the ikmpd. 2603 * 2604 * m will always be freed. 2605 */ 2606 static int 2607 key_api_spddump(struct socket *so, struct mbuf *m0, 2608 const struct sadb_msghdr *mhp) 2609 { 2610 struct mbuf *n; 2611 int error, len; 2612 int ok; 2613 pid_t pid; 2614 2615 pid = mhp->msg->sadb_msg_pid; 2616 /* 2617 * If the requestor has insufficient socket-buffer space 2618 * for the entire chain, nobody gets any response to the DUMP. 2619 * XXX For now, only the requestor ever gets anything. 2620 * Moreover, if the requestor has any space at all, they receive 2621 * the entire chain, otherwise the request is refused with ENOBUFS. 2622 */ 2623 if (sbspace(&so->so_rcv) <= 0) { 2624 return key_senderror(so, m0, ENOBUFS); 2625 } 2626 2627 mutex_enter(&key_spd.lock); 2628 n = key_setspddump_chain(&error, &len, pid); 2629 mutex_exit(&key_spd.lock); 2630 2631 if (n == NULL) { 2632 return key_senderror(so, m0, ENOENT); 2633 } 2634 { 2635 uint64_t *ps = PFKEY_STAT_GETREF(); 2636 ps[PFKEY_STAT_IN_TOTAL]++; 2637 ps[PFKEY_STAT_IN_BYTES] += len; 2638 PFKEY_STAT_PUTREF(); 2639 } 2640 2641 /* 2642 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2643 * The requestor receives either the entire chain, or an 2644 * error message with ENOBUFS. 2645 */ 2646 2647 /* 2648 * sbappendchainwith record takes the chain of entries, one 2649 * packet-record per SPD entry, prepends the key_src sockaddr 2650 * to each packet-record, links the sockaddr mbufs into a new 2651 * list of records, then appends the entire resulting 2652 * list to the requesting socket. 2653 */ 2654 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2655 SB_PRIO_ONESHOT_OVERFLOW); 2656 2657 if (!ok) { 2658 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2659 m_freem(n); 2660 return key_senderror(so, m0, ENOBUFS); 2661 } 2662 2663 m_freem(m0); 2664 return error; 2665 } 2666 2667 /* 2668 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2669 */ 2670 static int 2671 key_api_nat_map(struct socket *so, struct mbuf *m, 2672 const struct sadb_msghdr *mhp) 2673 { 2674 struct sadb_x_nat_t_type *type; 2675 struct sadb_x_nat_t_port *sport; 2676 struct sadb_x_nat_t_port *dport; 2677 struct sadb_address *iaddr, *raddr; 2678 struct sadb_x_nat_t_frag *frag; 2679 2680 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2681 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2682 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2683 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2684 return key_senderror(so, m, EINVAL); 2685 } 2686 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2687 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2688 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2689 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2690 return key_senderror(so, m, EINVAL); 2691 } 2692 2693 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2694 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2695 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2696 return key_senderror(so, m, EINVAL); 2697 } 2698 2699 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2700 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2701 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2702 return key_senderror(so, m, EINVAL); 2703 } 2704 2705 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2706 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2707 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2708 return key_senderror(so, m, EINVAL); 2709 } 2710 2711 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2712 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2713 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2714 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2715 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2716 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2717 2718 /* 2719 * XXX handle that, it should also contain a SA, or anything 2720 * that enable to update the SA information. 2721 */ 2722 2723 return 0; 2724 } 2725 2726 static struct mbuf * 2727 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2728 { 2729 struct mbuf *result = NULL, *m; 2730 2731 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, 2732 key_sp_refcnt(sp)); 2733 if (!m) 2734 goto fail; 2735 result = m; 2736 2737 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2738 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto); 2739 if (!m) 2740 goto fail; 2741 m_cat(result, m); 2742 2743 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2744 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto); 2745 if (!m) 2746 goto fail; 2747 m_cat(result, m); 2748 2749 m = key_sp2msg(sp); 2750 if (!m) 2751 goto fail; 2752 m_cat(result, m); 2753 2754 if ((result->m_flags & M_PKTHDR) == 0) 2755 goto fail; 2756 2757 if (result->m_len < sizeof(struct sadb_msg)) { 2758 result = m_pullup(result, sizeof(struct sadb_msg)); 2759 if (result == NULL) 2760 goto fail; 2761 } 2762 2763 result->m_pkthdr.len = 0; 2764 for (m = result; m; m = m->m_next) 2765 result->m_pkthdr.len += m->m_len; 2766 2767 mtod(result, struct sadb_msg *)->sadb_msg_len = 2768 PFKEY_UNIT64(result->m_pkthdr.len); 2769 2770 return result; 2771 2772 fail: 2773 m_freem(result); 2774 return NULL; 2775 } 2776 2777 /* 2778 * get PFKEY message length for security policy and request. 2779 */ 2780 static u_int 2781 key_getspreqmsglen(const struct secpolicy *sp) 2782 { 2783 u_int tlen; 2784 2785 tlen = sizeof(struct sadb_x_policy); 2786 2787 /* if is the policy for ipsec ? */ 2788 if (sp->policy != IPSEC_POLICY_IPSEC) 2789 return tlen; 2790 2791 /* get length of ipsec requests */ 2792 { 2793 const struct ipsecrequest *isr; 2794 int len; 2795 2796 for (isr = sp->req; isr != NULL; isr = isr->next) { 2797 len = sizeof(struct sadb_x_ipsecrequest) 2798 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 2799 2800 tlen += PFKEY_ALIGN8(len); 2801 } 2802 } 2803 2804 return tlen; 2805 } 2806 2807 /* 2808 * SADB_SPDEXPIRE processing 2809 * send 2810 * <base, address(SD), lifetime(CH), policy> 2811 * to KMD by PF_KEY. 2812 * 2813 * OUT: 0 : succeed 2814 * others : error number 2815 */ 2816 static int 2817 key_spdexpire(struct secpolicy *sp) 2818 { 2819 int s; 2820 struct mbuf *result = NULL, *m; 2821 int len; 2822 int error = -1; 2823 struct sadb_lifetime *lt; 2824 2825 /* XXX: Why do we lock ? */ 2826 s = splsoftnet(); /*called from softclock()*/ 2827 2828 KASSERT(sp != NULL); 2829 2830 /* set msg header */ 2831 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2832 if (!m) { 2833 error = ENOBUFS; 2834 goto fail; 2835 } 2836 result = m; 2837 2838 /* create lifetime extension (current and hard) */ 2839 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2840 m = key_alloc_mbuf(len); 2841 if (!m || m->m_next) { /*XXX*/ 2842 if (m) 2843 m_freem(m); 2844 error = ENOBUFS; 2845 goto fail; 2846 } 2847 memset(mtod(m, void *), 0, len); 2848 lt = mtod(m, struct sadb_lifetime *); 2849 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2850 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2851 lt->sadb_lifetime_allocations = 0; 2852 lt->sadb_lifetime_bytes = 0; 2853 lt->sadb_lifetime_addtime = time_mono_to_wall(sp->created); 2854 lt->sadb_lifetime_usetime = time_mono_to_wall(sp->lastused); 2855 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2856 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2857 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2858 lt->sadb_lifetime_allocations = 0; 2859 lt->sadb_lifetime_bytes = 0; 2860 lt->sadb_lifetime_addtime = sp->lifetime; 2861 lt->sadb_lifetime_usetime = sp->validtime; 2862 m_cat(result, m); 2863 2864 /* set sadb_address for source */ 2865 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 2866 sp->spidx.prefs, sp->spidx.ul_proto); 2867 if (!m) { 2868 error = ENOBUFS; 2869 goto fail; 2870 } 2871 m_cat(result, m); 2872 2873 /* set sadb_address for destination */ 2874 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 2875 sp->spidx.prefd, sp->spidx.ul_proto); 2876 if (!m) { 2877 error = ENOBUFS; 2878 goto fail; 2879 } 2880 m_cat(result, m); 2881 2882 /* set secpolicy */ 2883 m = key_sp2msg(sp); 2884 if (!m) { 2885 error = ENOBUFS; 2886 goto fail; 2887 } 2888 m_cat(result, m); 2889 2890 if ((result->m_flags & M_PKTHDR) == 0) { 2891 error = EINVAL; 2892 goto fail; 2893 } 2894 2895 if (result->m_len < sizeof(struct sadb_msg)) { 2896 result = m_pullup(result, sizeof(struct sadb_msg)); 2897 if (result == NULL) { 2898 error = ENOBUFS; 2899 goto fail; 2900 } 2901 } 2902 2903 result->m_pkthdr.len = 0; 2904 for (m = result; m; m = m->m_next) 2905 result->m_pkthdr.len += m->m_len; 2906 2907 mtod(result, struct sadb_msg *)->sadb_msg_len = 2908 PFKEY_UNIT64(result->m_pkthdr.len); 2909 2910 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2911 2912 fail: 2913 if (result) 2914 m_freem(result); 2915 splx(s); 2916 return error; 2917 } 2918 2919 /* %%% SAD management */ 2920 /* 2921 * allocating a memory for new SA head, and copy from the values of mhp. 2922 * OUT: NULL : failure due to the lack of memory. 2923 * others : pointer to new SA head. 2924 */ 2925 static struct secashead * 2926 key_newsah(const struct secasindex *saidx) 2927 { 2928 struct secashead *newsah; 2929 int i; 2930 2931 KASSERT(saidx != NULL); 2932 2933 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 2934 for (i = 0; i < __arraycount(newsah->savlist); i++) 2935 PSLIST_INIT(&newsah->savlist[i]); 2936 newsah->saidx = *saidx; 2937 2938 /* add to saidxtree */ 2939 newsah->state = SADB_SASTATE_MATURE; 2940 SAHLIST_ENTRY_INIT(newsah); 2941 mutex_enter(&key_sad.lock); 2942 SAHLIST_WRITER_INSERT_HEAD(newsah); 2943 mutex_exit(&key_sad.lock); 2944 2945 return newsah; 2946 } 2947 2948 /* 2949 * delete SA index and all SA registerd. 2950 */ 2951 static void 2952 key_delsah(struct secashead *sah) 2953 { 2954 struct secasvar *sav; 2955 u_int state; 2956 int s; 2957 int zombie = 0; 2958 2959 KASSERT(!cpu_softintr_p()); 2960 KASSERT(sah != NULL); 2961 2962 s = splsoftnet(); 2963 2964 /* searching all SA registerd in the secindex. */ 2965 SASTATE_ANY_FOREACH(state) { 2966 SAVLIST_READER_FOREACH(sav, sah, state) { 2967 /* give up to delete this sa */ 2968 zombie++; 2969 } 2970 } 2971 2972 /* don't delete sah only if there are savs. */ 2973 if (zombie) { 2974 splx(s); 2975 return; 2976 } 2977 2978 rtcache_free(&sah->sa_route); 2979 2980 /* remove from tree of SA index */ 2981 SAHLIST_WRITER_REMOVE(sah); 2982 2983 if (sah->idents != NULL) 2984 kmem_free(sah->idents, sah->idents_len); 2985 if (sah->identd != NULL) 2986 kmem_free(sah->identd, sah->identd_len); 2987 2988 SAHLIST_ENTRY_DESTROY(sah); 2989 kmem_free(sah, sizeof(*sah)); 2990 2991 splx(s); 2992 return; 2993 } 2994 2995 /* 2996 * allocating a new SA with LARVAL state. 2997 * key_api_add() and key_api_getspi() call, 2998 * and copy the values of mhp into new buffer. 2999 * When SAD message type is GETSPI: 3000 * to set sequence number from acq_seq++, 3001 * to set zero to SPI. 3002 * not to call key_setsava(). 3003 * OUT: NULL : fail 3004 * others : pointer to new secasvar. 3005 * 3006 * does not modify mbuf. does not free mbuf on error. 3007 */ 3008 static struct secasvar * 3009 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 3010 int *errp, const char* where, int tag) 3011 { 3012 struct secasvar *newsav; 3013 const struct sadb_sa *xsa; 3014 3015 KASSERT(!cpu_softintr_p()); 3016 KASSERT(m != NULL); 3017 KASSERT(mhp != NULL); 3018 KASSERT(mhp->msg != NULL); 3019 3020 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 3021 3022 switch (mhp->msg->sadb_msg_type) { 3023 case SADB_GETSPI: 3024 newsav->spi = 0; 3025 3026 #ifdef IPSEC_DOSEQCHECK 3027 /* sync sequence number */ 3028 if (mhp->msg->sadb_msg_seq == 0) 3029 newsav->seq = 3030 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 3031 else 3032 #endif 3033 newsav->seq = mhp->msg->sadb_msg_seq; 3034 break; 3035 3036 case SADB_ADD: 3037 /* sanity check */ 3038 if (mhp->ext[SADB_EXT_SA] == NULL) { 3039 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 3040 *errp = EINVAL; 3041 goto error; 3042 } 3043 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3044 newsav->spi = xsa->sadb_sa_spi; 3045 newsav->seq = mhp->msg->sadb_msg_seq; 3046 break; 3047 default: 3048 *errp = EINVAL; 3049 goto error; 3050 } 3051 3052 /* copy sav values */ 3053 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 3054 *errp = key_setsaval(newsav, m, mhp); 3055 if (*errp) 3056 goto error; 3057 } else { 3058 /* We don't allow lft_c to be NULL */ 3059 newsav->lft_c = kmem_zalloc(sizeof(struct sadb_lifetime), 3060 KM_SLEEP); 3061 } 3062 3063 /* reset created */ 3064 newsav->created = time_uptime; 3065 newsav->pid = mhp->msg->sadb_msg_pid; 3066 3067 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3068 "DP from %s:%u return SA:%p\n", where, tag, newsav); 3069 return newsav; 3070 3071 error: 3072 KASSERT(*errp != 0); 3073 kmem_free(newsav, sizeof(*newsav)); 3074 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3075 "DP from %s:%u return SA:NULL\n", where, tag); 3076 return NULL; 3077 } 3078 3079 3080 static void 3081 key_clear_xform(struct secasvar *sav) 3082 { 3083 3084 /* 3085 * Cleanup xform state. Note that zeroize'ing causes the 3086 * keys to be cleared; otherwise we must do it ourself. 3087 */ 3088 if (sav->tdb_xform != NULL) { 3089 sav->tdb_xform->xf_zeroize(sav); 3090 sav->tdb_xform = NULL; 3091 } else { 3092 if (sav->key_auth != NULL) 3093 explicit_memset(_KEYBUF(sav->key_auth), 0, 3094 _KEYLEN(sav->key_auth)); 3095 if (sav->key_enc != NULL) 3096 explicit_memset(_KEYBUF(sav->key_enc), 0, 3097 _KEYLEN(sav->key_enc)); 3098 } 3099 } 3100 3101 /* 3102 * free() SA variable entry. 3103 */ 3104 static void 3105 key_delsav(struct secasvar *sav) 3106 { 3107 3108 KASSERT(sav != NULL); 3109 KASSERTMSG(sav->refcnt == 0, "reference count %u > 0", sav->refcnt); 3110 3111 key_clear_xform(sav); 3112 key_freesaval(sav); 3113 SAVLIST_ENTRY_DESTROY(sav); 3114 kmem_intr_free(sav, sizeof(*sav)); 3115 3116 return; 3117 } 3118 3119 /* 3120 * search SAD. 3121 * OUT: 3122 * NULL : not found 3123 * others : found, pointer to a SA. 3124 */ 3125 static struct secashead * 3126 key_getsah(const struct secasindex *saidx, int flag) 3127 { 3128 struct secashead *sah; 3129 3130 SAHLIST_READER_FOREACH(sah) { 3131 if (sah->state == SADB_SASTATE_DEAD) 3132 continue; 3133 if (key_saidx_match(&sah->saidx, saidx, flag)) 3134 return sah; 3135 } 3136 3137 return NULL; 3138 } 3139 3140 /* 3141 * check not to be duplicated SPI. 3142 * NOTE: this function is too slow due to searching all SAD. 3143 * OUT: 3144 * NULL : not found 3145 * others : found, pointer to a SA. 3146 */ 3147 static bool 3148 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3149 { 3150 struct secashead *sah; 3151 struct secasvar *sav; 3152 3153 /* check address family */ 3154 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3155 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3156 return false; 3157 } 3158 3159 /* check all SAD */ 3160 SAHLIST_READER_FOREACH(sah) { 3161 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3162 continue; 3163 sav = key_getsavbyspi(sah, spi); 3164 if (sav != NULL) { 3165 KEY_SA_UNREF(&sav); 3166 return true; 3167 } 3168 } 3169 3170 return false; 3171 } 3172 3173 /* 3174 * search SAD litmited alive SA, protocol, SPI. 3175 * OUT: 3176 * NULL : not found 3177 * others : found, pointer to a SA. 3178 */ 3179 static struct secasvar * 3180 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3181 { 3182 struct secasvar *sav = NULL; 3183 u_int state; 3184 int s; 3185 3186 /* search all status */ 3187 s = pserialize_read_enter(); 3188 SASTATE_ALIVE_FOREACH(state) { 3189 SAVLIST_READER_FOREACH(sav, sah, state) { 3190 /* sanity check */ 3191 if (sav->state != state) { 3192 IPSECLOG(LOG_DEBUG, 3193 "invalid sav->state (queue: %d SA: %d)\n", 3194 state, sav->state); 3195 continue; 3196 } 3197 3198 if (sav->spi == spi) { 3199 SA_ADDREF(sav); 3200 goto out; 3201 } 3202 } 3203 } 3204 out: 3205 pserialize_read_exit(s); 3206 3207 return sav; 3208 } 3209 3210 /* 3211 * Free allocated data to member variables of sav: 3212 * sav->replay, sav->key_* and sav->lft_*. 3213 */ 3214 static void 3215 key_freesaval(struct secasvar *sav) 3216 { 3217 3218 KASSERT(sav->refcnt == 0); 3219 3220 if (sav->replay != NULL) 3221 kmem_intr_free(sav->replay, sav->replay_len); 3222 if (sav->key_auth != NULL) 3223 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3224 if (sav->key_enc != NULL) 3225 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3226 if (sav->lft_c != NULL) 3227 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3228 if (sav->lft_h != NULL) 3229 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3230 if (sav->lft_s != NULL) 3231 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3232 } 3233 3234 /* 3235 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3236 * You must update these if need. 3237 * OUT: 0: success. 3238 * !0: failure. 3239 * 3240 * does not modify mbuf. does not free mbuf on error. 3241 */ 3242 static int 3243 key_setsaval(struct secasvar *sav, struct mbuf *m, 3244 const struct sadb_msghdr *mhp) 3245 { 3246 int error = 0; 3247 3248 KASSERT(!cpu_softintr_p()); 3249 KASSERT(m != NULL); 3250 KASSERT(mhp != NULL); 3251 KASSERT(mhp->msg != NULL); 3252 3253 /* We shouldn't initialize sav variables while someone uses it. */ 3254 KASSERT(sav->refcnt == 0); 3255 3256 /* SA */ 3257 if (mhp->ext[SADB_EXT_SA] != NULL) { 3258 const struct sadb_sa *sa0; 3259 3260 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3261 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3262 error = EINVAL; 3263 goto fail; 3264 } 3265 3266 sav->alg_auth = sa0->sadb_sa_auth; 3267 sav->alg_enc = sa0->sadb_sa_encrypt; 3268 sav->flags = sa0->sadb_sa_flags; 3269 3270 /* replay window */ 3271 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3272 size_t len = sizeof(struct secreplay) + 3273 sa0->sadb_sa_replay; 3274 sav->replay = kmem_zalloc(len, KM_SLEEP); 3275 sav->replay_len = len; 3276 if (sa0->sadb_sa_replay != 0) 3277 sav->replay->bitmap = (char*)(sav->replay+1); 3278 sav->replay->wsize = sa0->sadb_sa_replay; 3279 } 3280 } 3281 3282 /* Authentication keys */ 3283 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3284 const struct sadb_key *key0; 3285 int len; 3286 3287 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3288 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3289 3290 error = 0; 3291 if (len < sizeof(*key0)) { 3292 error = EINVAL; 3293 goto fail; 3294 } 3295 switch (mhp->msg->sadb_msg_satype) { 3296 case SADB_SATYPE_AH: 3297 case SADB_SATYPE_ESP: 3298 case SADB_X_SATYPE_TCPSIGNATURE: 3299 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3300 sav->alg_auth != SADB_X_AALG_NULL) 3301 error = EINVAL; 3302 break; 3303 case SADB_X_SATYPE_IPCOMP: 3304 default: 3305 error = EINVAL; 3306 break; 3307 } 3308 if (error) { 3309 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3310 goto fail; 3311 } 3312 3313 sav->key_auth = key_newbuf(key0, len); 3314 sav->key_auth_len = len; 3315 } 3316 3317 /* Encryption key */ 3318 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3319 const struct sadb_key *key0; 3320 int len; 3321 3322 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3323 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3324 3325 error = 0; 3326 if (len < sizeof(*key0)) { 3327 error = EINVAL; 3328 goto fail; 3329 } 3330 switch (mhp->msg->sadb_msg_satype) { 3331 case SADB_SATYPE_ESP: 3332 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3333 sav->alg_enc != SADB_EALG_NULL) { 3334 error = EINVAL; 3335 break; 3336 } 3337 sav->key_enc = key_newbuf(key0, len); 3338 sav->key_enc_len = len; 3339 break; 3340 case SADB_X_SATYPE_IPCOMP: 3341 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3342 error = EINVAL; 3343 sav->key_enc = NULL; /*just in case*/ 3344 break; 3345 case SADB_SATYPE_AH: 3346 case SADB_X_SATYPE_TCPSIGNATURE: 3347 default: 3348 error = EINVAL; 3349 break; 3350 } 3351 if (error) { 3352 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3353 goto fail; 3354 } 3355 } 3356 3357 /* set iv */ 3358 sav->ivlen = 0; 3359 3360 switch (mhp->msg->sadb_msg_satype) { 3361 case SADB_SATYPE_AH: 3362 error = xform_init(sav, XF_AH); 3363 break; 3364 case SADB_SATYPE_ESP: 3365 error = xform_init(sav, XF_ESP); 3366 break; 3367 case SADB_X_SATYPE_IPCOMP: 3368 error = xform_init(sav, XF_IPCOMP); 3369 break; 3370 case SADB_X_SATYPE_TCPSIGNATURE: 3371 error = xform_init(sav, XF_TCPSIGNATURE); 3372 break; 3373 } 3374 if (error) { 3375 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3376 mhp->msg->sadb_msg_satype); 3377 goto fail; 3378 } 3379 3380 /* reset created */ 3381 sav->created = time_uptime; 3382 3383 /* make lifetime for CURRENT */ 3384 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3385 3386 sav->lft_c->sadb_lifetime_len = 3387 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3388 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3389 sav->lft_c->sadb_lifetime_allocations = 0; 3390 sav->lft_c->sadb_lifetime_bytes = 0; 3391 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3392 sav->lft_c->sadb_lifetime_usetime = 0; 3393 3394 /* lifetimes for HARD and SOFT */ 3395 { 3396 const struct sadb_lifetime *lft0; 3397 3398 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3399 if (lft0 != NULL) { 3400 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3401 error = EINVAL; 3402 goto fail; 3403 } 3404 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3405 } 3406 3407 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3408 if (lft0 != NULL) { 3409 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3410 error = EINVAL; 3411 goto fail; 3412 } 3413 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3414 /* to be initialize ? */ 3415 } 3416 } 3417 3418 return 0; 3419 3420 fail: 3421 key_clear_xform(sav); 3422 key_freesaval(sav); 3423 3424 return error; 3425 } 3426 3427 /* 3428 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3429 * OUT: 0: valid 3430 * other: errno 3431 */ 3432 static int 3433 key_init_xform(struct secasvar *sav) 3434 { 3435 int error; 3436 3437 /* We shouldn't initialize sav variables while someone uses it. */ 3438 KASSERT(sav->refcnt == 0); 3439 3440 /* check SPI value */ 3441 switch (sav->sah->saidx.proto) { 3442 case IPPROTO_ESP: 3443 case IPPROTO_AH: 3444 if (ntohl(sav->spi) <= 255) { 3445 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3446 (u_int32_t)ntohl(sav->spi)); 3447 return EINVAL; 3448 } 3449 break; 3450 } 3451 3452 /* check satype */ 3453 switch (sav->sah->saidx.proto) { 3454 case IPPROTO_ESP: 3455 /* check flags */ 3456 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3457 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3458 IPSECLOG(LOG_DEBUG, 3459 "invalid flag (derived) given to old-esp.\n"); 3460 return EINVAL; 3461 } 3462 error = xform_init(sav, XF_ESP); 3463 break; 3464 case IPPROTO_AH: 3465 /* check flags */ 3466 if (sav->flags & SADB_X_EXT_DERIV) { 3467 IPSECLOG(LOG_DEBUG, 3468 "invalid flag (derived) given to AH SA.\n"); 3469 return EINVAL; 3470 } 3471 if (sav->alg_enc != SADB_EALG_NONE) { 3472 IPSECLOG(LOG_DEBUG, 3473 "protocol and algorithm mismated.\n"); 3474 return(EINVAL); 3475 } 3476 error = xform_init(sav, XF_AH); 3477 break; 3478 case IPPROTO_IPCOMP: 3479 if (sav->alg_auth != SADB_AALG_NONE) { 3480 IPSECLOG(LOG_DEBUG, 3481 "protocol and algorithm mismated.\n"); 3482 return(EINVAL); 3483 } 3484 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3485 && ntohl(sav->spi) >= 0x10000) { 3486 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3487 return(EINVAL); 3488 } 3489 error = xform_init(sav, XF_IPCOMP); 3490 break; 3491 case IPPROTO_TCP: 3492 if (sav->alg_enc != SADB_EALG_NONE) { 3493 IPSECLOG(LOG_DEBUG, 3494 "protocol and algorithm mismated.\n"); 3495 return(EINVAL); 3496 } 3497 error = xform_init(sav, XF_TCPSIGNATURE); 3498 break; 3499 default: 3500 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3501 error = EPROTONOSUPPORT; 3502 break; 3503 } 3504 3505 return error; 3506 } 3507 3508 /* 3509 * subroutine for SADB_GET and SADB_DUMP. 3510 */ 3511 static struct mbuf * 3512 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3513 u_int32_t seq, u_int32_t pid) 3514 { 3515 struct mbuf *result = NULL, *tres = NULL, *m; 3516 int l = 0; 3517 int i; 3518 void *p; 3519 struct sadb_lifetime lt; 3520 int dumporder[] = { 3521 SADB_EXT_SA, SADB_X_EXT_SA2, 3522 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3523 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3524 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3525 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3526 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3527 SADB_X_EXT_NAT_T_TYPE, 3528 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3529 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3530 SADB_X_EXT_NAT_T_FRAG, 3531 3532 }; 3533 3534 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3535 if (m == NULL) 3536 goto fail; 3537 result = m; 3538 3539 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3540 m = NULL; 3541 p = NULL; 3542 switch (dumporder[i]) { 3543 case SADB_EXT_SA: 3544 m = key_setsadbsa(sav); 3545 break; 3546 3547 case SADB_X_EXT_SA2: 3548 m = key_setsadbxsa2(sav->sah->saidx.mode, 3549 sav->replay ? sav->replay->count : 0, 3550 sav->sah->saidx.reqid); 3551 break; 3552 3553 case SADB_EXT_ADDRESS_SRC: 3554 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3555 &sav->sah->saidx.src.sa, 3556 FULLMASK, IPSEC_ULPROTO_ANY); 3557 break; 3558 3559 case SADB_EXT_ADDRESS_DST: 3560 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3561 &sav->sah->saidx.dst.sa, 3562 FULLMASK, IPSEC_ULPROTO_ANY); 3563 break; 3564 3565 case SADB_EXT_KEY_AUTH: 3566 if (!sav->key_auth) 3567 continue; 3568 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3569 p = sav->key_auth; 3570 break; 3571 3572 case SADB_EXT_KEY_ENCRYPT: 3573 if (!sav->key_enc) 3574 continue; 3575 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3576 p = sav->key_enc; 3577 break; 3578 3579 case SADB_EXT_LIFETIME_CURRENT: 3580 KASSERT(sav->lft_c != NULL); 3581 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3582 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3583 lt.sadb_lifetime_addtime = 3584 time_mono_to_wall(lt.sadb_lifetime_addtime); 3585 lt.sadb_lifetime_usetime = 3586 time_mono_to_wall(lt.sadb_lifetime_usetime); 3587 p = < 3588 break; 3589 3590 case SADB_EXT_LIFETIME_HARD: 3591 if (!sav->lft_h) 3592 continue; 3593 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3594 p = sav->lft_h; 3595 break; 3596 3597 case SADB_EXT_LIFETIME_SOFT: 3598 if (!sav->lft_s) 3599 continue; 3600 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3601 p = sav->lft_s; 3602 break; 3603 3604 case SADB_X_EXT_NAT_T_TYPE: 3605 m = key_setsadbxtype(sav->natt_type); 3606 break; 3607 3608 case SADB_X_EXT_NAT_T_DPORT: 3609 if (sav->natt_type == 0) 3610 continue; 3611 m = key_setsadbxport( 3612 key_portfromsaddr(&sav->sah->saidx.dst), 3613 SADB_X_EXT_NAT_T_DPORT); 3614 break; 3615 3616 case SADB_X_EXT_NAT_T_SPORT: 3617 if (sav->natt_type == 0) 3618 continue; 3619 m = key_setsadbxport( 3620 key_portfromsaddr(&sav->sah->saidx.src), 3621 SADB_X_EXT_NAT_T_SPORT); 3622 break; 3623 3624 case SADB_X_EXT_NAT_T_FRAG: 3625 /* don't send frag info if not set */ 3626 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3627 continue; 3628 m = key_setsadbxfrag(sav->esp_frag); 3629 break; 3630 3631 case SADB_X_EXT_NAT_T_OAI: 3632 case SADB_X_EXT_NAT_T_OAR: 3633 continue; 3634 3635 case SADB_EXT_ADDRESS_PROXY: 3636 case SADB_EXT_IDENTITY_SRC: 3637 case SADB_EXT_IDENTITY_DST: 3638 /* XXX: should we brought from SPD ? */ 3639 case SADB_EXT_SENSITIVITY: 3640 default: 3641 continue; 3642 } 3643 3644 KASSERT(!(m && p)); 3645 if (!m && !p) 3646 goto fail; 3647 if (p && tres) { 3648 M_PREPEND(tres, l, M_DONTWAIT); 3649 if (!tres) 3650 goto fail; 3651 memcpy(mtod(tres, void *), p, l); 3652 continue; 3653 } 3654 if (p) { 3655 m = key_alloc_mbuf(l); 3656 if (!m) 3657 goto fail; 3658 m_copyback(m, 0, l, p); 3659 } 3660 3661 if (tres) 3662 m_cat(m, tres); 3663 tres = m; 3664 } 3665 3666 m_cat(result, tres); 3667 tres = NULL; /* avoid free on error below */ 3668 3669 if (result->m_len < sizeof(struct sadb_msg)) { 3670 result = m_pullup(result, sizeof(struct sadb_msg)); 3671 if (result == NULL) 3672 goto fail; 3673 } 3674 3675 result->m_pkthdr.len = 0; 3676 for (m = result; m; m = m->m_next) 3677 result->m_pkthdr.len += m->m_len; 3678 3679 mtod(result, struct sadb_msg *)->sadb_msg_len = 3680 PFKEY_UNIT64(result->m_pkthdr.len); 3681 3682 return result; 3683 3684 fail: 3685 m_freem(result); 3686 m_freem(tres); 3687 return NULL; 3688 } 3689 3690 3691 /* 3692 * set a type in sadb_x_nat_t_type 3693 */ 3694 static struct mbuf * 3695 key_setsadbxtype(u_int16_t type) 3696 { 3697 struct mbuf *m; 3698 size_t len; 3699 struct sadb_x_nat_t_type *p; 3700 3701 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3702 3703 m = key_alloc_mbuf(len); 3704 if (!m || m->m_next) { /*XXX*/ 3705 if (m) 3706 m_freem(m); 3707 return NULL; 3708 } 3709 3710 p = mtod(m, struct sadb_x_nat_t_type *); 3711 3712 memset(p, 0, len); 3713 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3714 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3715 p->sadb_x_nat_t_type_type = type; 3716 3717 return m; 3718 } 3719 /* 3720 * set a port in sadb_x_nat_t_port. port is in network order 3721 */ 3722 static struct mbuf * 3723 key_setsadbxport(u_int16_t port, u_int16_t type) 3724 { 3725 struct mbuf *m; 3726 size_t len; 3727 struct sadb_x_nat_t_port *p; 3728 3729 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3730 3731 m = key_alloc_mbuf(len); 3732 if (!m || m->m_next) { /*XXX*/ 3733 if (m) 3734 m_freem(m); 3735 return NULL; 3736 } 3737 3738 p = mtod(m, struct sadb_x_nat_t_port *); 3739 3740 memset(p, 0, len); 3741 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3742 p->sadb_x_nat_t_port_exttype = type; 3743 p->sadb_x_nat_t_port_port = port; 3744 3745 return m; 3746 } 3747 3748 /* 3749 * set fragmentation info in sadb_x_nat_t_frag 3750 */ 3751 static struct mbuf * 3752 key_setsadbxfrag(u_int16_t flen) 3753 { 3754 struct mbuf *m; 3755 size_t len; 3756 struct sadb_x_nat_t_frag *p; 3757 3758 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3759 3760 m = key_alloc_mbuf(len); 3761 if (!m || m->m_next) { /*XXX*/ 3762 if (m) 3763 m_freem(m); 3764 return NULL; 3765 } 3766 3767 p = mtod(m, struct sadb_x_nat_t_frag *); 3768 3769 memset(p, 0, len); 3770 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3771 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3772 p->sadb_x_nat_t_frag_fraglen = flen; 3773 3774 return m; 3775 } 3776 3777 /* 3778 * Get port from sockaddr, port is in network order 3779 */ 3780 u_int16_t 3781 key_portfromsaddr(const union sockaddr_union *saddr) 3782 { 3783 u_int16_t port; 3784 3785 switch (saddr->sa.sa_family) { 3786 case AF_INET: { 3787 port = saddr->sin.sin_port; 3788 break; 3789 } 3790 #ifdef INET6 3791 case AF_INET6: { 3792 port = saddr->sin6.sin6_port; 3793 break; 3794 } 3795 #endif 3796 default: 3797 printf("%s: unexpected address family\n", __func__); 3798 port = 0; 3799 break; 3800 } 3801 3802 return port; 3803 } 3804 3805 3806 /* 3807 * Set port is struct sockaddr. port is in network order 3808 */ 3809 static void 3810 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3811 { 3812 switch (saddr->sa.sa_family) { 3813 case AF_INET: { 3814 saddr->sin.sin_port = port; 3815 break; 3816 } 3817 #ifdef INET6 3818 case AF_INET6: { 3819 saddr->sin6.sin6_port = port; 3820 break; 3821 } 3822 #endif 3823 default: 3824 printf("%s: unexpected address family %d\n", __func__, 3825 saddr->sa.sa_family); 3826 break; 3827 } 3828 3829 return; 3830 } 3831 3832 /* 3833 * Safety check sa_len 3834 */ 3835 static int 3836 key_checksalen(const union sockaddr_union *saddr) 3837 { 3838 switch (saddr->sa.sa_family) { 3839 case AF_INET: 3840 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3841 return -1; 3842 break; 3843 #ifdef INET6 3844 case AF_INET6: 3845 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3846 return -1; 3847 break; 3848 #endif 3849 default: 3850 printf("%s: unexpected sa_family %d\n", __func__, 3851 saddr->sa.sa_family); 3852 return -1; 3853 break; 3854 } 3855 return 0; 3856 } 3857 3858 3859 /* 3860 * set data into sadb_msg. 3861 */ 3862 static struct mbuf * 3863 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3864 u_int32_t seq, pid_t pid, u_int16_t reserved) 3865 { 3866 struct mbuf *m; 3867 struct sadb_msg *p; 3868 int len; 3869 3870 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 3871 3872 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3873 3874 MGETHDR(m, M_DONTWAIT, MT_DATA); 3875 if (m && len > MHLEN) { 3876 MCLGET(m, M_DONTWAIT); 3877 if ((m->m_flags & M_EXT) == 0) { 3878 m_freem(m); 3879 m = NULL; 3880 } 3881 } 3882 if (!m) 3883 return NULL; 3884 m->m_pkthdr.len = m->m_len = len; 3885 m->m_next = NULL; 3886 3887 p = mtod(m, struct sadb_msg *); 3888 3889 memset(p, 0, len); 3890 p->sadb_msg_version = PF_KEY_V2; 3891 p->sadb_msg_type = type; 3892 p->sadb_msg_errno = 0; 3893 p->sadb_msg_satype = satype; 3894 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3895 p->sadb_msg_reserved = reserved; 3896 p->sadb_msg_seq = seq; 3897 p->sadb_msg_pid = (u_int32_t)pid; 3898 3899 return m; 3900 } 3901 3902 /* 3903 * copy secasvar data into sadb_address. 3904 */ 3905 static struct mbuf * 3906 key_setsadbsa(struct secasvar *sav) 3907 { 3908 struct mbuf *m; 3909 struct sadb_sa *p; 3910 int len; 3911 3912 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3913 m = key_alloc_mbuf(len); 3914 if (!m || m->m_next) { /*XXX*/ 3915 if (m) 3916 m_freem(m); 3917 return NULL; 3918 } 3919 3920 p = mtod(m, struct sadb_sa *); 3921 3922 memset(p, 0, len); 3923 p->sadb_sa_len = PFKEY_UNIT64(len); 3924 p->sadb_sa_exttype = SADB_EXT_SA; 3925 p->sadb_sa_spi = sav->spi; 3926 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3927 p->sadb_sa_state = sav->state; 3928 p->sadb_sa_auth = sav->alg_auth; 3929 p->sadb_sa_encrypt = sav->alg_enc; 3930 p->sadb_sa_flags = sav->flags; 3931 3932 return m; 3933 } 3934 3935 /* 3936 * set data into sadb_address. 3937 */ 3938 static struct mbuf * 3939 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3940 u_int8_t prefixlen, u_int16_t ul_proto) 3941 { 3942 struct mbuf *m; 3943 struct sadb_address *p; 3944 size_t len; 3945 3946 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3947 PFKEY_ALIGN8(saddr->sa_len); 3948 m = key_alloc_mbuf(len); 3949 if (!m || m->m_next) { /*XXX*/ 3950 if (m) 3951 m_freem(m); 3952 return NULL; 3953 } 3954 3955 p = mtod(m, struct sadb_address *); 3956 3957 memset(p, 0, len); 3958 p->sadb_address_len = PFKEY_UNIT64(len); 3959 p->sadb_address_exttype = exttype; 3960 p->sadb_address_proto = ul_proto; 3961 if (prefixlen == FULLMASK) { 3962 switch (saddr->sa_family) { 3963 case AF_INET: 3964 prefixlen = sizeof(struct in_addr) << 3; 3965 break; 3966 case AF_INET6: 3967 prefixlen = sizeof(struct in6_addr) << 3; 3968 break; 3969 default: 3970 ; /*XXX*/ 3971 } 3972 } 3973 p->sadb_address_prefixlen = prefixlen; 3974 p->sadb_address_reserved = 0; 3975 3976 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3977 saddr, saddr->sa_len); 3978 3979 return m; 3980 } 3981 3982 #if 0 3983 /* 3984 * set data into sadb_ident. 3985 */ 3986 static struct mbuf * 3987 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 3988 void *string, int stringlen, u_int64_t id) 3989 { 3990 struct mbuf *m; 3991 struct sadb_ident *p; 3992 size_t len; 3993 3994 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 3995 m = key_alloc_mbuf(len); 3996 if (!m || m->m_next) { /*XXX*/ 3997 if (m) 3998 m_freem(m); 3999 return NULL; 4000 } 4001 4002 p = mtod(m, struct sadb_ident *); 4003 4004 memset(p, 0, len); 4005 p->sadb_ident_len = PFKEY_UNIT64(len); 4006 p->sadb_ident_exttype = exttype; 4007 p->sadb_ident_type = idtype; 4008 p->sadb_ident_reserved = 0; 4009 p->sadb_ident_id = id; 4010 4011 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 4012 string, stringlen); 4013 4014 return m; 4015 } 4016 #endif 4017 4018 /* 4019 * set data into sadb_x_sa2. 4020 */ 4021 static struct mbuf * 4022 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4023 { 4024 struct mbuf *m; 4025 struct sadb_x_sa2 *p; 4026 size_t len; 4027 4028 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4029 m = key_alloc_mbuf(len); 4030 if (!m || m->m_next) { /*XXX*/ 4031 if (m) 4032 m_freem(m); 4033 return NULL; 4034 } 4035 4036 p = mtod(m, struct sadb_x_sa2 *); 4037 4038 memset(p, 0, len); 4039 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4040 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4041 p->sadb_x_sa2_mode = mode; 4042 p->sadb_x_sa2_reserved1 = 0; 4043 p->sadb_x_sa2_reserved2 = 0; 4044 p->sadb_x_sa2_sequence = seq; 4045 p->sadb_x_sa2_reqid = reqid; 4046 4047 return m; 4048 } 4049 4050 /* 4051 * set data into sadb_x_policy 4052 */ 4053 static struct mbuf * 4054 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4055 { 4056 struct mbuf *m; 4057 struct sadb_x_policy *p; 4058 size_t len; 4059 4060 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4061 m = key_alloc_mbuf(len); 4062 if (!m || m->m_next) { /*XXX*/ 4063 if (m) 4064 m_freem(m); 4065 return NULL; 4066 } 4067 4068 p = mtod(m, struct sadb_x_policy *); 4069 4070 memset(p, 0, len); 4071 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4072 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4073 p->sadb_x_policy_type = type; 4074 p->sadb_x_policy_dir = dir; 4075 p->sadb_x_policy_id = id; 4076 4077 return m; 4078 } 4079 4080 /* %%% utilities */ 4081 /* 4082 * copy a buffer into the new buffer allocated. 4083 */ 4084 static void * 4085 key_newbuf(const void *src, u_int len) 4086 { 4087 void *new; 4088 4089 new = kmem_alloc(len, KM_SLEEP); 4090 memcpy(new, src, len); 4091 4092 return new; 4093 } 4094 4095 /* compare my own address 4096 * OUT: 1: true, i.e. my address. 4097 * 0: false 4098 */ 4099 int 4100 key_ismyaddr(const struct sockaddr *sa) 4101 { 4102 #ifdef INET 4103 const struct sockaddr_in *sin; 4104 const struct in_ifaddr *ia; 4105 int s; 4106 #endif 4107 4108 KASSERT(sa != NULL); 4109 4110 switch (sa->sa_family) { 4111 #ifdef INET 4112 case AF_INET: 4113 sin = (const struct sockaddr_in *)sa; 4114 s = pserialize_read_enter(); 4115 IN_ADDRLIST_READER_FOREACH(ia) { 4116 if (sin->sin_family == ia->ia_addr.sin_family && 4117 sin->sin_len == ia->ia_addr.sin_len && 4118 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4119 { 4120 pserialize_read_exit(s); 4121 return 1; 4122 } 4123 } 4124 pserialize_read_exit(s); 4125 break; 4126 #endif 4127 #ifdef INET6 4128 case AF_INET6: 4129 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4130 #endif 4131 } 4132 4133 return 0; 4134 } 4135 4136 #ifdef INET6 4137 /* 4138 * compare my own address for IPv6. 4139 * 1: ours 4140 * 0: other 4141 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4142 */ 4143 #include <netinet6/in6_var.h> 4144 4145 static int 4146 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4147 { 4148 struct in6_ifaddr *ia; 4149 int s; 4150 struct psref psref; 4151 int bound; 4152 int ours = 1; 4153 4154 bound = curlwp_bind(); 4155 s = pserialize_read_enter(); 4156 IN6_ADDRLIST_READER_FOREACH(ia) { 4157 bool ingroup; 4158 4159 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4160 (const struct sockaddr *)&ia->ia_addr, 0)) { 4161 pserialize_read_exit(s); 4162 goto ours; 4163 } 4164 ia6_acquire(ia, &psref); 4165 pserialize_read_exit(s); 4166 4167 /* 4168 * XXX Multicast 4169 * XXX why do we care about multlicast here while we don't care 4170 * about IPv4 multicast?? 4171 * XXX scope 4172 */ 4173 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4174 if (ingroup) { 4175 ia6_release(ia, &psref); 4176 goto ours; 4177 } 4178 4179 s = pserialize_read_enter(); 4180 ia6_release(ia, &psref); 4181 } 4182 pserialize_read_exit(s); 4183 4184 /* loopback, just for safety */ 4185 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4186 goto ours; 4187 4188 ours = 0; 4189 ours: 4190 curlwp_bindx(bound); 4191 4192 return ours; 4193 } 4194 #endif /*INET6*/ 4195 4196 /* 4197 * compare two secasindex structure. 4198 * flag can specify to compare 2 saidxes. 4199 * compare two secasindex structure without both mode and reqid. 4200 * don't compare port. 4201 * IN: 4202 * saidx0: source, it can be in SAD. 4203 * saidx1: object. 4204 * OUT: 4205 * 1 : equal 4206 * 0 : not equal 4207 */ 4208 static int 4209 key_saidx_match( 4210 const struct secasindex *saidx0, 4211 const struct secasindex *saidx1, 4212 int flag) 4213 { 4214 int chkport; 4215 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4216 4217 KASSERT(saidx0 != NULL); 4218 KASSERT(saidx1 != NULL); 4219 4220 /* sanity */ 4221 if (saidx0->proto != saidx1->proto) 4222 return 0; 4223 4224 if (flag == CMP_EXACTLY) { 4225 if (saidx0->mode != saidx1->mode) 4226 return 0; 4227 if (saidx0->reqid != saidx1->reqid) 4228 return 0; 4229 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4230 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4231 return 0; 4232 } else { 4233 4234 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4235 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4236 /* 4237 * If reqid of SPD is non-zero, unique SA is required. 4238 * The result must be of same reqid in this case. 4239 */ 4240 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4241 return 0; 4242 } 4243 4244 if (flag == CMP_MODE_REQID) { 4245 if (saidx0->mode != IPSEC_MODE_ANY && 4246 saidx0->mode != saidx1->mode) 4247 return 0; 4248 } 4249 4250 4251 sa0src = &saidx0->src.sa; 4252 sa0dst = &saidx0->dst.sa; 4253 sa1src = &saidx1->src.sa; 4254 sa1dst = &saidx1->dst.sa; 4255 /* 4256 * If NAT-T is enabled, check ports for tunnel mode. 4257 * Don't do it for transport mode, as there is no 4258 * port information available in the SP. 4259 * Also don't check ports if they are set to zero 4260 * in the SPD: This means we have a non-generated 4261 * SPD which can't know UDP ports. 4262 */ 4263 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4264 chkport = PORT_LOOSE; 4265 else 4266 chkport = PORT_NONE; 4267 4268 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4269 return 0; 4270 } 4271 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4272 return 0; 4273 } 4274 } 4275 4276 return 1; 4277 } 4278 4279 /* 4280 * compare two secindex structure exactly. 4281 * IN: 4282 * spidx0: source, it is often in SPD. 4283 * spidx1: object, it is often from PFKEY message. 4284 * OUT: 4285 * 1 : equal 4286 * 0 : not equal 4287 */ 4288 static int 4289 key_spidx_match_exactly( 4290 const struct secpolicyindex *spidx0, 4291 const struct secpolicyindex *spidx1) 4292 { 4293 4294 KASSERT(spidx0 != NULL); 4295 KASSERT(spidx1 != NULL); 4296 4297 /* sanity */ 4298 if (spidx0->prefs != spidx1->prefs || 4299 spidx0->prefd != spidx1->prefd || 4300 spidx0->ul_proto != spidx1->ul_proto) 4301 return 0; 4302 4303 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4304 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4305 } 4306 4307 /* 4308 * compare two secindex structure with mask. 4309 * IN: 4310 * spidx0: source, it is often in SPD. 4311 * spidx1: object, it is often from IP header. 4312 * OUT: 4313 * 1 : equal 4314 * 0 : not equal 4315 */ 4316 static int 4317 key_spidx_match_withmask( 4318 const struct secpolicyindex *spidx0, 4319 const struct secpolicyindex *spidx1) 4320 { 4321 4322 KASSERT(spidx0 != NULL); 4323 KASSERT(spidx1 != NULL); 4324 4325 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4326 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4327 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4328 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4329 return 0; 4330 4331 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4332 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4333 spidx0->ul_proto != spidx1->ul_proto) 4334 return 0; 4335 4336 switch (spidx0->src.sa.sa_family) { 4337 case AF_INET: 4338 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4339 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4340 return 0; 4341 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4342 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4343 return 0; 4344 break; 4345 case AF_INET6: 4346 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4347 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4348 return 0; 4349 /* 4350 * scope_id check. if sin6_scope_id is 0, we regard it 4351 * as a wildcard scope, which matches any scope zone ID. 4352 */ 4353 if (spidx0->src.sin6.sin6_scope_id && 4354 spidx1->src.sin6.sin6_scope_id && 4355 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4356 return 0; 4357 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4358 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4359 return 0; 4360 break; 4361 default: 4362 /* XXX */ 4363 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4364 return 0; 4365 break; 4366 } 4367 4368 switch (spidx0->dst.sa.sa_family) { 4369 case AF_INET: 4370 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4371 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4372 return 0; 4373 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4374 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4375 return 0; 4376 break; 4377 case AF_INET6: 4378 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4379 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4380 return 0; 4381 /* 4382 * scope_id check. if sin6_scope_id is 0, we regard it 4383 * as a wildcard scope, which matches any scope zone ID. 4384 */ 4385 if (spidx0->src.sin6.sin6_scope_id && 4386 spidx1->src.sin6.sin6_scope_id && 4387 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4388 return 0; 4389 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4390 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4391 return 0; 4392 break; 4393 default: 4394 /* XXX */ 4395 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4396 return 0; 4397 break; 4398 } 4399 4400 /* XXX Do we check other field ? e.g. flowinfo */ 4401 4402 return 1; 4403 } 4404 4405 /* returns 0 on match */ 4406 static int 4407 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4408 { 4409 switch (howport) { 4410 case PORT_NONE: 4411 return 0; 4412 case PORT_LOOSE: 4413 if (port1 == 0 || port2 == 0) 4414 return 0; 4415 /*FALLTHROUGH*/ 4416 case PORT_STRICT: 4417 if (port1 != port2) { 4418 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4419 "port fail %d != %d\n", port1, port2); 4420 return 1; 4421 } 4422 return 0; 4423 default: 4424 KASSERT(0); 4425 return 1; 4426 } 4427 } 4428 4429 /* returns 1 on match */ 4430 static int 4431 key_sockaddr_match( 4432 const struct sockaddr *sa1, 4433 const struct sockaddr *sa2, 4434 int howport) 4435 { 4436 const struct sockaddr_in *sin1, *sin2; 4437 const struct sockaddr_in6 *sin61, *sin62; 4438 4439 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4440 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4441 "fam/len fail %d != %d || %d != %d\n", 4442 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4443 sa2->sa_len); 4444 return 0; 4445 } 4446 4447 switch (sa1->sa_family) { 4448 case AF_INET: 4449 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4450 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4451 "len fail %d != %zu\n", 4452 sa1->sa_len, sizeof(struct sockaddr_in)); 4453 return 0; 4454 } 4455 sin1 = (const struct sockaddr_in *)sa1; 4456 sin2 = (const struct sockaddr_in *)sa2; 4457 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4458 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4459 "addr fail %#x != %#x\n", 4460 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4461 return 0; 4462 } 4463 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4464 return 0; 4465 } 4466 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4467 "addr success %#x[%d] == %#x[%d]\n", 4468 sin1->sin_addr.s_addr, sin1->sin_port, 4469 sin2->sin_addr.s_addr, sin2->sin_port); 4470 break; 4471 case AF_INET6: 4472 sin61 = (const struct sockaddr_in6 *)sa1; 4473 sin62 = (const struct sockaddr_in6 *)sa2; 4474 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4475 return 0; /*EINVAL*/ 4476 4477 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4478 return 0; 4479 } 4480 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4481 return 0; 4482 } 4483 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4484 return 0; 4485 } 4486 break; 4487 default: 4488 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4489 return 0; 4490 break; 4491 } 4492 4493 return 1; 4494 } 4495 4496 /* 4497 * compare two buffers with mask. 4498 * IN: 4499 * addr1: source 4500 * addr2: object 4501 * bits: Number of bits to compare 4502 * OUT: 4503 * 1 : equal 4504 * 0 : not equal 4505 */ 4506 static int 4507 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4508 { 4509 const unsigned char *p1 = a1; 4510 const unsigned char *p2 = a2; 4511 4512 /* XXX: This could be considerably faster if we compare a word 4513 * at a time, but it is complicated on LSB Endian machines */ 4514 4515 /* Handle null pointers */ 4516 if (p1 == NULL || p2 == NULL) 4517 return (p1 == p2); 4518 4519 while (bits >= 8) { 4520 if (*p1++ != *p2++) 4521 return 0; 4522 bits -= 8; 4523 } 4524 4525 if (bits > 0) { 4526 u_int8_t mask = ~((1<<(8-bits))-1); 4527 if ((*p1 & mask) != (*p2 & mask)) 4528 return 0; 4529 } 4530 return 1; /* Match! */ 4531 } 4532 4533 static void 4534 key_timehandler_spd(time_t now) 4535 { 4536 u_int dir; 4537 struct secpolicy *sp; 4538 4539 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4540 retry: 4541 mutex_enter(&key_spd.lock); 4542 SPLIST_WRITER_FOREACH(sp, dir) { 4543 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 4544 4545 if (sp->lifetime == 0 && sp->validtime == 0) 4546 continue; 4547 4548 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4549 (sp->validtime && now - sp->lastused > sp->validtime)) { 4550 key_unlink_sp(sp); 4551 mutex_exit(&key_spd.lock); 4552 key_spdexpire(sp); 4553 key_destroy_sp(sp); 4554 goto retry; 4555 } 4556 } 4557 mutex_exit(&key_spd.lock); 4558 } 4559 4560 retry_socksplist: 4561 mutex_enter(&key_spd.lock); 4562 SOCKSPLIST_WRITER_FOREACH(sp) { 4563 if (sp->state != IPSEC_SPSTATE_DEAD) 4564 continue; 4565 4566 key_unlink_sp(sp); 4567 mutex_exit(&key_spd.lock); 4568 key_destroy_sp(sp); 4569 goto retry_socksplist; 4570 } 4571 mutex_exit(&key_spd.lock); 4572 } 4573 4574 static void 4575 key_timehandler_sad(time_t now) 4576 { 4577 struct secashead *sah; 4578 struct secasvar *sav; 4579 4580 restart: 4581 SAHLIST_WRITER_FOREACH(sah) { 4582 /* if sah has been dead, then delete it and process next sah. */ 4583 if (sah->state == SADB_SASTATE_DEAD) { 4584 key_delsah(sah); 4585 goto restart; 4586 } 4587 4588 /* if LARVAL entry doesn't become MATURE, delete it. */ 4589 restart_sav_LARVAL: 4590 SAVLIST_READER_FOREACH(sav, sah, SADB_SASTATE_LARVAL) { 4591 if (now - sav->created > key_larval_lifetime) { 4592 KEY_FREESAV(&sav); 4593 goto restart_sav_LARVAL; 4594 } 4595 } 4596 4597 /* 4598 * check MATURE entry to start to send expire message 4599 * whether or not. 4600 */ 4601 restart_sav_MATURE: 4602 SAVLIST_READER_FOREACH(sav, sah, SADB_SASTATE_MATURE) { 4603 /* we don't need to check. */ 4604 if (sav->lft_s == NULL) 4605 continue; 4606 4607 /* sanity check */ 4608 KASSERT(sav->lft_c != NULL); 4609 4610 /* check SOFT lifetime */ 4611 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4612 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4613 /* 4614 * check SA to be used whether or not. 4615 * when SA hasn't been used, delete it. 4616 */ 4617 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4618 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4619 KEY_FREESAV(&sav); 4620 } else { 4621 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4622 /* 4623 * XXX If we keep to send expire 4624 * message in the status of 4625 * DYING. Do remove below code. 4626 */ 4627 key_expire(sav); 4628 } 4629 goto restart_sav_MATURE; 4630 } 4631 /* check SOFT lifetime by bytes */ 4632 /* 4633 * XXX I don't know the way to delete this SA 4634 * when new SA is installed. Caution when it's 4635 * installed too big lifetime by time. 4636 */ 4637 else if (sav->lft_s->sadb_lifetime_bytes != 0 && 4638 sav->lft_s->sadb_lifetime_bytes < 4639 sav->lft_c->sadb_lifetime_bytes) { 4640 4641 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4642 /* 4643 * XXX If we keep to send expire 4644 * message in the status of 4645 * DYING. Do remove below code. 4646 */ 4647 key_expire(sav); 4648 goto restart_sav_MATURE; 4649 } 4650 } 4651 4652 /* check DYING entry to change status to DEAD. */ 4653 restart_sav_DYING: 4654 SAVLIST_READER_FOREACH(sav, sah, SADB_SASTATE_DYING) { 4655 /* we don't need to check. */ 4656 if (sav->lft_h == NULL) 4657 continue; 4658 4659 /* sanity check */ 4660 KASSERT(sav->lft_c != NULL); 4661 4662 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4663 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4664 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4665 KEY_FREESAV(&sav); 4666 goto restart_sav_DYING; 4667 } 4668 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4669 else if (sav->lft_s != NULL 4670 && sav->lft_s->sadb_lifetime_addtime != 0 4671 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4672 /* 4673 * XXX: should be checked to be 4674 * installed the valid SA. 4675 */ 4676 4677 /* 4678 * If there is no SA then sending 4679 * expire message. 4680 */ 4681 key_expire(sav); 4682 } 4683 #endif 4684 /* check HARD lifetime by bytes */ 4685 else if (sav->lft_h->sadb_lifetime_bytes != 0 && 4686 sav->lft_h->sadb_lifetime_bytes < 4687 sav->lft_c->sadb_lifetime_bytes) { 4688 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4689 KEY_FREESAV(&sav); 4690 goto restart_sav_DYING; 4691 } 4692 } 4693 4694 /* delete entry in DEAD */ 4695 SAVLIST_READER_FOREACH(sav, sah, SADB_SASTATE_DEAD) { 4696 /* sanity check */ 4697 if (sav->state != SADB_SASTATE_DEAD) { 4698 IPSECLOG(LOG_DEBUG, 4699 "invalid sav->state (queue: %d SA: %d): " 4700 "kill it anyway\n", 4701 SADB_SASTATE_DEAD, sav->state); 4702 } 4703 4704 /* 4705 * do not call key_freesav() here. 4706 * sav should already be freed, and sav->refcnt 4707 * shows other references to sav 4708 * (such as from SPD). 4709 */ 4710 } 4711 } 4712 } 4713 4714 static void 4715 key_timehandler_acq(time_t now) 4716 { 4717 #ifndef IPSEC_NONBLOCK_ACQUIRE 4718 struct secacq *acq, *nextacq; 4719 4720 restart: 4721 mutex_enter(&key_misc.lock); 4722 LIST_FOREACH_SAFE(acq, &key_misc.acqlist, chain, nextacq) { 4723 if (now - acq->created > key_blockacq_lifetime) { 4724 LIST_REMOVE(acq, chain); 4725 mutex_exit(&key_misc.lock); 4726 kmem_free(acq, sizeof(*acq)); 4727 goto restart; 4728 } 4729 } 4730 mutex_exit(&key_misc.lock); 4731 #endif 4732 } 4733 4734 static void 4735 key_timehandler_spacq(time_t now) 4736 { 4737 #ifdef notyet 4738 struct secspacq *acq, *nextacq; 4739 4740 LIST_FOREACH_SAFE(acq, &key_misc.spacqlist, chain, nextacq) { 4741 if (now - acq->created > key_blockacq_lifetime) { 4742 KASSERT(__LIST_CHAINED(acq)); 4743 LIST_REMOVE(acq, chain); 4744 kmem_free(acq, sizeof(*acq)); 4745 } 4746 } 4747 #endif 4748 } 4749 4750 /* 4751 * time handler. 4752 * scanning SPD and SAD to check status for each entries, 4753 * and do to remove or to expire. 4754 */ 4755 static void 4756 key_timehandler_work(struct work *wk, void *arg) 4757 { 4758 time_t now = time_uptime; 4759 IPSEC_DECLARE_LOCK_VARIABLE; 4760 4761 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 4762 4763 key_timehandler_spd(now); 4764 key_timehandler_sad(now); 4765 key_timehandler_acq(now); 4766 key_timehandler_spacq(now); 4767 4768 /* do exchange to tick time !! */ 4769 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4770 4771 IPSEC_RELEASE_GLOBAL_LOCKS(); 4772 return; 4773 } 4774 4775 static void 4776 key_timehandler(void *arg) 4777 { 4778 4779 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 4780 } 4781 4782 u_long 4783 key_random(void) 4784 { 4785 u_long value; 4786 4787 key_randomfill(&value, sizeof(value)); 4788 return value; 4789 } 4790 4791 void 4792 key_randomfill(void *p, size_t l) 4793 { 4794 4795 cprng_fast(p, l); 4796 } 4797 4798 /* 4799 * map SADB_SATYPE_* to IPPROTO_*. 4800 * if satype == SADB_SATYPE then satype is mapped to ~0. 4801 * OUT: 4802 * 0: invalid satype. 4803 */ 4804 static u_int16_t 4805 key_satype2proto(u_int8_t satype) 4806 { 4807 switch (satype) { 4808 case SADB_SATYPE_UNSPEC: 4809 return IPSEC_PROTO_ANY; 4810 case SADB_SATYPE_AH: 4811 return IPPROTO_AH; 4812 case SADB_SATYPE_ESP: 4813 return IPPROTO_ESP; 4814 case SADB_X_SATYPE_IPCOMP: 4815 return IPPROTO_IPCOMP; 4816 case SADB_X_SATYPE_TCPSIGNATURE: 4817 return IPPROTO_TCP; 4818 default: 4819 return 0; 4820 } 4821 /* NOTREACHED */ 4822 } 4823 4824 /* 4825 * map IPPROTO_* to SADB_SATYPE_* 4826 * OUT: 4827 * 0: invalid protocol type. 4828 */ 4829 static u_int8_t 4830 key_proto2satype(u_int16_t proto) 4831 { 4832 switch (proto) { 4833 case IPPROTO_AH: 4834 return SADB_SATYPE_AH; 4835 case IPPROTO_ESP: 4836 return SADB_SATYPE_ESP; 4837 case IPPROTO_IPCOMP: 4838 return SADB_X_SATYPE_IPCOMP; 4839 case IPPROTO_TCP: 4840 return SADB_X_SATYPE_TCPSIGNATURE; 4841 default: 4842 return 0; 4843 } 4844 /* NOTREACHED */ 4845 } 4846 4847 static int 4848 key_setsecasidx(int proto, int mode, int reqid, 4849 const struct sockaddr *src, const struct sockaddr *dst, 4850 struct secasindex * saidx) 4851 { 4852 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 4853 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 4854 4855 /* sa len safety check */ 4856 if (key_checksalen(src_u) != 0) 4857 return -1; 4858 if (key_checksalen(dst_u) != 0) 4859 return -1; 4860 4861 memset(saidx, 0, sizeof(*saidx)); 4862 saidx->proto = proto; 4863 saidx->mode = mode; 4864 saidx->reqid = reqid; 4865 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4866 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4867 4868 key_porttosaddr(&((saidx)->src), 0); 4869 key_porttosaddr(&((saidx)->dst), 0); 4870 return 0; 4871 } 4872 4873 static void 4874 key_init_spidx_bymsghdr(struct secpolicyindex *spidx, 4875 const struct sadb_msghdr *mhp) 4876 { 4877 const struct sadb_address *src0, *dst0; 4878 const struct sockaddr *src, *dst; 4879 const struct sadb_x_policy *xpl0; 4880 4881 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4882 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4883 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4884 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4885 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 4886 4887 memset(spidx, 0, sizeof(*spidx)); 4888 spidx->dir = xpl0->sadb_x_policy_dir; 4889 spidx->prefs = src0->sadb_address_prefixlen; 4890 spidx->prefd = dst0->sadb_address_prefixlen; 4891 spidx->ul_proto = src0->sadb_address_proto; 4892 /* XXX boundary check against sa_len */ 4893 memcpy(&spidx->src, src, src->sa_len); 4894 memcpy(&spidx->dst, dst, dst->sa_len); 4895 } 4896 4897 /* %%% PF_KEY */ 4898 /* 4899 * SADB_GETSPI processing is to receive 4900 * <base, (SA2), src address, dst address, (SPI range)> 4901 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4902 * tree with the status of LARVAL, and send 4903 * <base, SA(*), address(SD)> 4904 * to the IKMPd. 4905 * 4906 * IN: mhp: pointer to the pointer to each header. 4907 * OUT: NULL if fail. 4908 * other if success, return pointer to the message to send. 4909 */ 4910 static int 4911 key_api_getspi(struct socket *so, struct mbuf *m, 4912 const struct sadb_msghdr *mhp) 4913 { 4914 const struct sockaddr *src, *dst; 4915 struct secasindex saidx; 4916 struct secashead *sah; 4917 struct secasvar *newsav; 4918 u_int8_t proto; 4919 u_int32_t spi; 4920 u_int8_t mode; 4921 u_int16_t reqid; 4922 int error; 4923 4924 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4925 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4926 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4927 return key_senderror(so, m, EINVAL); 4928 } 4929 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4930 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4931 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4932 return key_senderror(so, m, EINVAL); 4933 } 4934 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4935 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4936 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4937 } else { 4938 mode = IPSEC_MODE_ANY; 4939 reqid = 0; 4940 } 4941 4942 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4943 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4944 4945 /* map satype to proto */ 4946 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 4947 if (proto == 0) { 4948 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 4949 return key_senderror(so, m, EINVAL); 4950 } 4951 4952 4953 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 4954 if (error != 0) 4955 return key_senderror(so, m, EINVAL); 4956 4957 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 4958 if (error != 0) 4959 return key_senderror(so, m, EINVAL); 4960 4961 /* SPI allocation */ 4962 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4963 &saidx); 4964 if (spi == 0) 4965 return key_senderror(so, m, EINVAL); 4966 4967 /* get a SA index */ 4968 sah = key_getsah(&saidx, CMP_REQID); 4969 if (sah == NULL) { 4970 /* create a new SA index */ 4971 sah = key_newsah(&saidx); 4972 if (sah == NULL) { 4973 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 4974 return key_senderror(so, m, ENOBUFS); 4975 } 4976 } 4977 4978 /* get a new SA */ 4979 /* XXX rewrite */ 4980 newsav = KEY_NEWSAV(m, mhp, &error); 4981 if (newsav == NULL) { 4982 /* XXX don't free new SA index allocated in above. */ 4983 return key_senderror(so, m, error); 4984 } 4985 4986 /* set spi */ 4987 newsav->spi = htonl(spi); 4988 4989 /* add to satree */ 4990 newsav->refcnt = 1; 4991 newsav->sah = sah; 4992 newsav->state = SADB_SASTATE_LARVAL; 4993 SAVLIST_ENTRY_INIT(newsav); 4994 mutex_enter(&key_sad.lock); 4995 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_LARVAL, newsav); 4996 mutex_exit(&key_sad.lock); 4997 key_validate_savlist(sah, SADB_SASTATE_LARVAL); 4998 4999 #ifndef IPSEC_NONBLOCK_ACQUIRE 5000 /* delete the entry in key_misc.acqlist */ 5001 if (mhp->msg->sadb_msg_seq != 0) { 5002 struct secacq *acq; 5003 mutex_enter(&key_misc.lock); 5004 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 5005 if (acq != NULL) { 5006 /* reset counter in order to deletion by timehandler. */ 5007 acq->created = time_uptime; 5008 acq->count = 0; 5009 } 5010 mutex_exit(&key_misc.lock); 5011 } 5012 #endif 5013 5014 { 5015 struct mbuf *n, *nn; 5016 struct sadb_sa *m_sa; 5017 int off, len; 5018 5019 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5020 PFKEY_ALIGN8(sizeof(struct sadb_sa)) <= MCLBYTES); 5021 5022 /* create new sadb_msg to reply. */ 5023 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5024 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5025 5026 MGETHDR(n, M_DONTWAIT, MT_DATA); 5027 if (len > MHLEN) { 5028 MCLGET(n, M_DONTWAIT); 5029 if ((n->m_flags & M_EXT) == 0) { 5030 m_freem(n); 5031 n = NULL; 5032 } 5033 } 5034 if (!n) 5035 return key_senderror(so, m, ENOBUFS); 5036 5037 n->m_len = len; 5038 n->m_next = NULL; 5039 off = 0; 5040 5041 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 5042 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 5043 5044 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 5045 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 5046 m_sa->sadb_sa_exttype = SADB_EXT_SA; 5047 m_sa->sadb_sa_spi = htonl(spi); 5048 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5049 5050 KASSERTMSG(off == len, "length inconsistency"); 5051 5052 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5053 SADB_EXT_ADDRESS_DST); 5054 if (!n->m_next) { 5055 m_freem(n); 5056 return key_senderror(so, m, ENOBUFS); 5057 } 5058 5059 if (n->m_len < sizeof(struct sadb_msg)) { 5060 n = m_pullup(n, sizeof(struct sadb_msg)); 5061 if (n == NULL) 5062 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 5063 } 5064 5065 n->m_pkthdr.len = 0; 5066 for (nn = n; nn; nn = nn->m_next) 5067 n->m_pkthdr.len += nn->m_len; 5068 5069 key_fill_replymsg(n, newsav->seq); 5070 5071 m_freem(m); 5072 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5073 } 5074 } 5075 5076 /* 5077 * allocating new SPI 5078 * called by key_api_getspi(). 5079 * OUT: 5080 * 0: failure. 5081 * others: success. 5082 */ 5083 static u_int32_t 5084 key_do_getnewspi(const struct sadb_spirange *spirange, 5085 const struct secasindex *saidx) 5086 { 5087 u_int32_t newspi; 5088 u_int32_t spmin, spmax; 5089 int count = key_spi_trycnt; 5090 5091 /* set spi range to allocate */ 5092 if (spirange != NULL) { 5093 spmin = spirange->sadb_spirange_min; 5094 spmax = spirange->sadb_spirange_max; 5095 } else { 5096 spmin = key_spi_minval; 5097 spmax = key_spi_maxval; 5098 } 5099 /* IPCOMP needs 2-byte SPI */ 5100 if (saidx->proto == IPPROTO_IPCOMP) { 5101 u_int32_t t; 5102 if (spmin >= 0x10000) 5103 spmin = 0xffff; 5104 if (spmax >= 0x10000) 5105 spmax = 0xffff; 5106 if (spmin > spmax) { 5107 t = spmin; spmin = spmax; spmax = t; 5108 } 5109 } 5110 5111 if (spmin == spmax) { 5112 if (key_checkspidup(saidx, htonl(spmin))) { 5113 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 5114 return 0; 5115 } 5116 5117 count--; /* taking one cost. */ 5118 newspi = spmin; 5119 5120 } else { 5121 5122 /* init SPI */ 5123 newspi = 0; 5124 5125 /* when requesting to allocate spi ranged */ 5126 while (count--) { 5127 /* generate pseudo-random SPI value ranged. */ 5128 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5129 5130 if (!key_checkspidup(saidx, htonl(newspi))) 5131 break; 5132 } 5133 5134 if (count == 0 || newspi == 0) { 5135 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5136 return 0; 5137 } 5138 } 5139 5140 /* statistics */ 5141 keystat.getspi_count = 5142 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5143 5144 return newspi; 5145 } 5146 5147 static int 5148 key_handle_natt_info(struct secasvar *sav, 5149 const struct sadb_msghdr *mhp) 5150 { 5151 const char *msg = "?" ; 5152 struct sadb_x_nat_t_type *type; 5153 struct sadb_x_nat_t_port *sport, *dport; 5154 struct sadb_address *iaddr, *raddr; 5155 struct sadb_x_nat_t_frag *frag; 5156 5157 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5158 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5159 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5160 return 0; 5161 5162 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5163 msg = "TYPE"; 5164 goto bad; 5165 } 5166 5167 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5168 msg = "SPORT"; 5169 goto bad; 5170 } 5171 5172 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5173 msg = "DPORT"; 5174 goto bad; 5175 } 5176 5177 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5178 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5179 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5180 msg = "OAI"; 5181 goto bad; 5182 } 5183 } 5184 5185 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5186 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5187 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5188 msg = "OAR"; 5189 goto bad; 5190 } 5191 } 5192 5193 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5194 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5195 msg = "FRAG"; 5196 goto bad; 5197 } 5198 } 5199 5200 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5201 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5202 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5203 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5204 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5205 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5206 5207 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5208 type->sadb_x_nat_t_type_type, 5209 ntohs(sport->sadb_x_nat_t_port_port), 5210 ntohs(dport->sadb_x_nat_t_port_port)); 5211 5212 sav->natt_type = type->sadb_x_nat_t_type_type; 5213 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5214 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5215 if (frag) 5216 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5217 else 5218 sav->esp_frag = IP_MAXPACKET; 5219 5220 return 0; 5221 bad: 5222 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5223 __USE(msg); 5224 return -1; 5225 } 5226 5227 /* Just update the IPSEC_NAT_T ports if present */ 5228 static int 5229 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5230 const struct sadb_msghdr *mhp) 5231 { 5232 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5233 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5234 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5235 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5236 5237 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5238 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5239 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5240 struct sadb_x_nat_t_type *type; 5241 struct sadb_x_nat_t_port *sport; 5242 struct sadb_x_nat_t_port *dport; 5243 5244 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5245 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5246 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5247 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5248 return -1; 5249 } 5250 5251 type = (struct sadb_x_nat_t_type *) 5252 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5253 sport = (struct sadb_x_nat_t_port *) 5254 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5255 dport = (struct sadb_x_nat_t_port *) 5256 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5257 5258 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5259 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5260 5261 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5262 type->sadb_x_nat_t_type_type, 5263 ntohs(sport->sadb_x_nat_t_port_port), 5264 ntohs(dport->sadb_x_nat_t_port_port)); 5265 } 5266 5267 return 0; 5268 } 5269 5270 5271 /* 5272 * SADB_UPDATE processing 5273 * receive 5274 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5275 * key(AE), (identity(SD),) (sensitivity)> 5276 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5277 * and send 5278 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5279 * (identity(SD),) (sensitivity)> 5280 * to the ikmpd. 5281 * 5282 * m will always be freed. 5283 */ 5284 static int 5285 key_api_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5286 { 5287 struct sadb_sa *sa0; 5288 const struct sockaddr *src, *dst; 5289 struct secasindex saidx; 5290 struct secashead *sah; 5291 struct secasvar *sav, *newsav; 5292 u_int16_t proto; 5293 u_int8_t mode; 5294 u_int16_t reqid; 5295 int error; 5296 5297 /* map satype to proto */ 5298 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5299 if (proto == 0) { 5300 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5301 return key_senderror(so, m, EINVAL); 5302 } 5303 5304 if (mhp->ext[SADB_EXT_SA] == NULL || 5305 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5306 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5307 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5308 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5309 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5310 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5311 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5312 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5313 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5314 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5315 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5316 return key_senderror(so, m, EINVAL); 5317 } 5318 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5319 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5320 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5321 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5322 return key_senderror(so, m, EINVAL); 5323 } 5324 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5325 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5326 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5327 } else { 5328 mode = IPSEC_MODE_ANY; 5329 reqid = 0; 5330 } 5331 /* XXX boundary checking for other extensions */ 5332 5333 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5334 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5335 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5336 5337 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5338 if (error != 0) 5339 return key_senderror(so, m, EINVAL); 5340 5341 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5342 if (error != 0) 5343 return key_senderror(so, m, EINVAL); 5344 5345 /* get a SA header */ 5346 sah = key_getsah(&saidx, CMP_REQID); 5347 if (sah == NULL) { 5348 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5349 return key_senderror(so, m, ENOENT); 5350 } 5351 5352 /* set spidx if there */ 5353 /* XXX rewrite */ 5354 error = key_setident(sah, m, mhp); 5355 if (error) 5356 return key_senderror(so, m, error); 5357 5358 /* find a SA with sequence number. */ 5359 #ifdef IPSEC_DOSEQCHECK 5360 if (mhp->msg->sadb_msg_seq != 0) { 5361 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5362 if (sav == NULL) { 5363 IPSECLOG(LOG_DEBUG, 5364 "no larval SA with sequence %u exists.\n", 5365 mhp->msg->sadb_msg_seq); 5366 return key_senderror(so, m, ENOENT); 5367 } 5368 } 5369 #else 5370 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5371 if (sav == NULL) { 5372 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5373 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5374 return key_senderror(so, m, EINVAL); 5375 } 5376 #endif 5377 5378 /* validity check */ 5379 if (sav->sah->saidx.proto != proto) { 5380 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5381 sav->sah->saidx.proto, proto); 5382 error = EINVAL; 5383 goto error; 5384 } 5385 #ifdef IPSEC_DOSEQCHECK 5386 if (sav->spi != sa0->sadb_sa_spi) { 5387 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5388 (u_int32_t)ntohl(sav->spi), 5389 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5390 error = EINVAL; 5391 goto error; 5392 } 5393 #endif 5394 if (sav->pid != mhp->msg->sadb_msg_pid) { 5395 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5396 sav->pid, mhp->msg->sadb_msg_pid); 5397 error = EINVAL; 5398 goto error; 5399 } 5400 5401 /* 5402 * Allocate a new SA instead of modifying the existing SA directly 5403 * to avoid race conditions. 5404 */ 5405 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 5406 5407 /* copy sav values */ 5408 newsav->spi = sav->spi; 5409 newsav->seq = sav->seq; 5410 newsav->created = sav->created; 5411 newsav->pid = sav->pid; 5412 newsav->sah = sav->sah; 5413 5414 error = key_setsaval(newsav, m, mhp); 5415 if (error) { 5416 key_delsav(newsav); 5417 goto error; 5418 } 5419 5420 error = key_handle_natt_info(newsav, mhp); 5421 if (error != 0) { 5422 key_delsav(newsav); 5423 goto error; 5424 } 5425 5426 error = key_init_xform(newsav); 5427 if (error != 0) { 5428 key_delsav(newsav); 5429 goto error; 5430 } 5431 5432 /* add to satree */ 5433 newsav->refcnt = 1; 5434 newsav->state = SADB_SASTATE_MATURE; 5435 SAVLIST_ENTRY_INIT(newsav); 5436 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_MATURE, newsav); 5437 key_validate_savlist(sah, SADB_SASTATE_MATURE); 5438 5439 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5440 KEY_FREESAV(&sav); 5441 KEY_FREESAV(&sav); 5442 5443 { 5444 struct mbuf *n; 5445 5446 /* set msg buf from mhp */ 5447 n = key_getmsgbuf_x1(m, mhp); 5448 if (n == NULL) { 5449 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5450 return key_senderror(so, m, ENOBUFS); 5451 } 5452 5453 m_freem(m); 5454 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5455 } 5456 error: 5457 KEY_SA_UNREF(&sav); 5458 return key_senderror(so, m, error); 5459 } 5460 5461 /* 5462 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5463 * only called by key_api_update(). 5464 * OUT: 5465 * NULL : not found 5466 * others : found, pointer to a SA. 5467 */ 5468 #ifdef IPSEC_DOSEQCHECK 5469 static struct secasvar * 5470 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5471 { 5472 struct secasvar *sav; 5473 u_int state; 5474 int s; 5475 5476 state = SADB_SASTATE_LARVAL; 5477 5478 /* search SAD with sequence number ? */ 5479 s = pserialize_read_enter(); 5480 SAVLIST_READER_FOREACH(sav, sah, state) { 5481 KEY_CHKSASTATE(state, sav->state); 5482 5483 if (sav->seq == seq) { 5484 SA_ADDREF(sav); 5485 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5486 "DP cause refcnt++:%d SA:%p\n", 5487 sav->refcnt, sav); 5488 break; 5489 } 5490 } 5491 pserialize_read_exit(s); 5492 5493 return sav; 5494 } 5495 #endif 5496 5497 /* 5498 * SADB_ADD processing 5499 * add an entry to SA database, when received 5500 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5501 * key(AE), (identity(SD),) (sensitivity)> 5502 * from the ikmpd, 5503 * and send 5504 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5505 * (identity(SD),) (sensitivity)> 5506 * to the ikmpd. 5507 * 5508 * IGNORE identity and sensitivity messages. 5509 * 5510 * m will always be freed. 5511 */ 5512 static int 5513 key_api_add(struct socket *so, struct mbuf *m, 5514 const struct sadb_msghdr *mhp) 5515 { 5516 struct sadb_sa *sa0; 5517 const struct sockaddr *src, *dst; 5518 struct secasindex saidx; 5519 struct secashead *sah; 5520 struct secasvar *newsav; 5521 u_int16_t proto; 5522 u_int8_t mode; 5523 u_int16_t reqid; 5524 int error; 5525 5526 /* map satype to proto */ 5527 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5528 if (proto == 0) { 5529 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5530 return key_senderror(so, m, EINVAL); 5531 } 5532 5533 if (mhp->ext[SADB_EXT_SA] == NULL || 5534 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5535 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5536 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5537 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5538 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5539 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5540 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5541 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5542 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5543 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5544 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5545 return key_senderror(so, m, EINVAL); 5546 } 5547 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5548 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5549 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5550 /* XXX need more */ 5551 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5552 return key_senderror(so, m, EINVAL); 5553 } 5554 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5555 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5556 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5557 } else { 5558 mode = IPSEC_MODE_ANY; 5559 reqid = 0; 5560 } 5561 5562 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5563 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5564 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5565 5566 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5567 if (error != 0) 5568 return key_senderror(so, m, EINVAL); 5569 5570 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5571 if (error != 0) 5572 return key_senderror(so, m, EINVAL); 5573 5574 /* get a SA header */ 5575 sah = key_getsah(&saidx, CMP_REQID); 5576 if (sah == NULL) { 5577 /* create a new SA header */ 5578 sah = key_newsah(&saidx); 5579 if (sah == NULL) { 5580 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5581 return key_senderror(so, m, ENOBUFS); 5582 } 5583 } 5584 5585 /* set spidx if there */ 5586 /* XXX rewrite */ 5587 error = key_setident(sah, m, mhp); 5588 if (error) { 5589 return key_senderror(so, m, error); 5590 } 5591 5592 { 5593 struct secasvar *sav; 5594 5595 /* We can create new SA only if SPI is differenct. */ 5596 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5597 if (sav != NULL) { 5598 KEY_SA_UNREF(&sav); 5599 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5600 return key_senderror(so, m, EEXIST); 5601 } 5602 } 5603 5604 /* create new SA entry. */ 5605 newsav = KEY_NEWSAV(m, mhp, &error); 5606 if (newsav == NULL) { 5607 return key_senderror(so, m, error); 5608 } 5609 newsav->sah = sah; 5610 5611 error = key_handle_natt_info(newsav, mhp); 5612 if (error != 0) { 5613 key_delsav(newsav); 5614 return key_senderror(so, m, EINVAL); 5615 } 5616 5617 error = key_init_xform(newsav); 5618 if (error != 0) { 5619 key_delsav(newsav); 5620 return key_senderror(so, m, error); 5621 } 5622 5623 /* add to satree */ 5624 newsav->refcnt = 1; 5625 newsav->state = SADB_SASTATE_MATURE; 5626 SAVLIST_ENTRY_INIT(newsav); 5627 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_MATURE, newsav); 5628 key_validate_savlist(sah, SADB_SASTATE_MATURE); 5629 5630 /* 5631 * don't call key_freesav() here, as we would like to keep the SA 5632 * in the database on success. 5633 */ 5634 5635 { 5636 struct mbuf *n; 5637 5638 /* set msg buf from mhp */ 5639 n = key_getmsgbuf_x1(m, mhp); 5640 if (n == NULL) { 5641 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5642 return key_senderror(so, m, ENOBUFS); 5643 } 5644 5645 m_freem(m); 5646 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5647 } 5648 } 5649 5650 /* m is retained */ 5651 static int 5652 key_setident(struct secashead *sah, struct mbuf *m, 5653 const struct sadb_msghdr *mhp) 5654 { 5655 const struct sadb_ident *idsrc, *iddst; 5656 int idsrclen, iddstlen; 5657 5658 KASSERT(!cpu_softintr_p()); 5659 KASSERT(sah != NULL); 5660 KASSERT(m != NULL); 5661 KASSERT(mhp != NULL); 5662 KASSERT(mhp->msg != NULL); 5663 5664 /* 5665 * Can be called with an existing sah from key_api_update(). 5666 */ 5667 if (sah->idents != NULL) { 5668 kmem_free(sah->idents, sah->idents_len); 5669 sah->idents = NULL; 5670 sah->idents_len = 0; 5671 } 5672 if (sah->identd != NULL) { 5673 kmem_free(sah->identd, sah->identd_len); 5674 sah->identd = NULL; 5675 sah->identd_len = 0; 5676 } 5677 5678 /* don't make buffer if not there */ 5679 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5680 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5681 sah->idents = NULL; 5682 sah->identd = NULL; 5683 return 0; 5684 } 5685 5686 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5687 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5688 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 5689 return EINVAL; 5690 } 5691 5692 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5693 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5694 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5695 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5696 5697 /* validity check */ 5698 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5699 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 5700 return EINVAL; 5701 } 5702 5703 switch (idsrc->sadb_ident_type) { 5704 case SADB_IDENTTYPE_PREFIX: 5705 case SADB_IDENTTYPE_FQDN: 5706 case SADB_IDENTTYPE_USERFQDN: 5707 default: 5708 /* XXX do nothing */ 5709 sah->idents = NULL; 5710 sah->identd = NULL; 5711 return 0; 5712 } 5713 5714 /* make structure */ 5715 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 5716 sah->idents_len = idsrclen; 5717 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 5718 sah->identd_len = iddstlen; 5719 memcpy(sah->idents, idsrc, idsrclen); 5720 memcpy(sah->identd, iddst, iddstlen); 5721 5722 return 0; 5723 } 5724 5725 /* 5726 * m will not be freed on return. 5727 * it is caller's responsibility to free the result. 5728 */ 5729 static struct mbuf * 5730 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5731 { 5732 struct mbuf *n; 5733 5734 KASSERT(m != NULL); 5735 KASSERT(mhp != NULL); 5736 KASSERT(mhp->msg != NULL); 5737 5738 /* create new sadb_msg to reply. */ 5739 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5740 SADB_EXT_SA, SADB_X_EXT_SA2, 5741 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5742 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5743 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5744 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5745 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5746 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5747 if (!n) 5748 return NULL; 5749 5750 if (n->m_len < sizeof(struct sadb_msg)) { 5751 n = m_pullup(n, sizeof(struct sadb_msg)); 5752 if (n == NULL) 5753 return NULL; 5754 } 5755 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5756 mtod(n, struct sadb_msg *)->sadb_msg_len = 5757 PFKEY_UNIT64(n->m_pkthdr.len); 5758 5759 return n; 5760 } 5761 5762 static int key_delete_all (struct socket *, struct mbuf *, 5763 const struct sadb_msghdr *, u_int16_t); 5764 5765 /* 5766 * SADB_DELETE processing 5767 * receive 5768 * <base, SA(*), address(SD)> 5769 * from the ikmpd, and set SADB_SASTATE_DEAD, 5770 * and send, 5771 * <base, SA(*), address(SD)> 5772 * to the ikmpd. 5773 * 5774 * m will always be freed. 5775 */ 5776 static int 5777 key_api_delete(struct socket *so, struct mbuf *m, 5778 const struct sadb_msghdr *mhp) 5779 { 5780 struct sadb_sa *sa0; 5781 const struct sockaddr *src, *dst; 5782 struct secasindex saidx; 5783 struct secashead *sah; 5784 struct secasvar *sav = NULL; 5785 u_int16_t proto; 5786 int error; 5787 5788 /* map satype to proto */ 5789 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5790 if (proto == 0) { 5791 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5792 return key_senderror(so, m, EINVAL); 5793 } 5794 5795 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5796 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5797 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5798 return key_senderror(so, m, EINVAL); 5799 } 5800 5801 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5802 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5803 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5804 return key_senderror(so, m, EINVAL); 5805 } 5806 5807 if (mhp->ext[SADB_EXT_SA] == NULL) { 5808 /* 5809 * Caller wants us to delete all non-LARVAL SAs 5810 * that match the src/dst. This is used during 5811 * IKE INITIAL-CONTACT. 5812 */ 5813 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 5814 return key_delete_all(so, m, mhp, proto); 5815 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5816 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5817 return key_senderror(so, m, EINVAL); 5818 } 5819 5820 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5821 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5822 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5823 5824 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5825 if (error != 0) 5826 return key_senderror(so, m, EINVAL); 5827 5828 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5829 if (error != 0) 5830 return key_senderror(so, m, EINVAL); 5831 5832 /* get a SA header */ 5833 sah = key_getsah(&saidx, CMP_HEAD); 5834 if (sah != NULL) { 5835 /* get a SA with SPI. */ 5836 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5837 } 5838 5839 if (sav == NULL) { 5840 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5841 return key_senderror(so, m, ENOENT); 5842 } 5843 5844 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5845 KEY_FREESAV(&sav); 5846 KEY_FREESAV(&sav); 5847 5848 { 5849 struct mbuf *n; 5850 5851 /* create new sadb_msg to reply. */ 5852 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5853 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5854 if (!n) 5855 return key_senderror(so, m, ENOBUFS); 5856 5857 n = key_fill_replymsg(n, 0); 5858 if (n == NULL) 5859 return key_senderror(so, m, ENOBUFS); 5860 5861 m_freem(m); 5862 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5863 } 5864 } 5865 5866 /* 5867 * delete all SAs for src/dst. Called from key_api_delete(). 5868 */ 5869 static int 5870 key_delete_all(struct socket *so, struct mbuf *m, 5871 const struct sadb_msghdr *mhp, u_int16_t proto) 5872 { 5873 const struct sockaddr *src, *dst; 5874 struct secasindex saidx; 5875 struct secashead *sah; 5876 struct secasvar *sav; 5877 u_int state; 5878 int error; 5879 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, IPSEC_MODE_ANY, 0, 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 sah = key_getsah(&saidx, CMP_HEAD); 5892 if (sah != NULL) { 5893 /* Delete all non-LARVAL SAs. */ 5894 SASTATE_ALIVE_FOREACH(state) { 5895 if (state == SADB_SASTATE_LARVAL) 5896 continue; 5897 restart: 5898 SAVLIST_WRITER_FOREACH(sav, sah, state) { 5899 /* sanity check */ 5900 if (sav->state != state) { 5901 IPSECLOG(LOG_DEBUG, 5902 "invalid sav->state " 5903 "(queue: %d SA: %d)\n", 5904 state, sav->state); 5905 continue; 5906 } 5907 5908 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5909 KEY_FREESAV(&sav); 5910 goto restart; 5911 } 5912 } 5913 } 5914 { 5915 struct mbuf *n; 5916 5917 /* create new sadb_msg to reply. */ 5918 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5919 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5920 if (!n) 5921 return key_senderror(so, m, ENOBUFS); 5922 5923 n = key_fill_replymsg(n, 0); 5924 if (n == NULL) 5925 return key_senderror(so, m, ENOBUFS); 5926 5927 m_freem(m); 5928 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5929 } 5930 } 5931 5932 /* 5933 * SADB_GET processing 5934 * receive 5935 * <base, SA(*), address(SD)> 5936 * from the ikmpd, and get a SP and a SA to respond, 5937 * and send, 5938 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5939 * (identity(SD),) (sensitivity)> 5940 * to the ikmpd. 5941 * 5942 * m will always be freed. 5943 */ 5944 static int 5945 key_api_get(struct socket *so, struct mbuf *m, 5946 const struct sadb_msghdr *mhp) 5947 { 5948 struct sadb_sa *sa0; 5949 const struct sockaddr *src, *dst; 5950 struct secasindex saidx; 5951 struct secashead *sah; 5952 struct secasvar *sav = NULL; 5953 u_int16_t proto; 5954 int error; 5955 5956 /* map satype to proto */ 5957 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5958 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5959 return key_senderror(so, m, EINVAL); 5960 } 5961 5962 if (mhp->ext[SADB_EXT_SA] == NULL || 5963 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5964 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5965 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5966 return key_senderror(so, m, EINVAL); 5967 } 5968 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5969 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5970 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5971 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5972 return key_senderror(so, m, EINVAL); 5973 } 5974 5975 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5976 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5977 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5978 5979 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5980 if (error != 0) 5981 return key_senderror(so, m, EINVAL); 5982 5983 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5984 if (error != 0) 5985 return key_senderror(so, m, EINVAL); 5986 5987 /* get a SA header */ 5988 sah = key_getsah(&saidx, CMP_HEAD); 5989 if (sah != NULL) { 5990 /* get a SA with SPI. */ 5991 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5992 } 5993 if (sav == NULL) { 5994 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5995 return key_senderror(so, m, ENOENT); 5996 } 5997 5998 { 5999 struct mbuf *n; 6000 u_int8_t satype; 6001 6002 /* map proto to satype */ 6003 satype = key_proto2satype(sah->saidx.proto); 6004 if (satype == 0) { 6005 KEY_SA_UNREF(&sav); 6006 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 6007 return key_senderror(so, m, EINVAL); 6008 } 6009 6010 /* create new sadb_msg to reply. */ 6011 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 6012 mhp->msg->sadb_msg_pid); 6013 KEY_SA_UNREF(&sav); 6014 if (!n) 6015 return key_senderror(so, m, ENOBUFS); 6016 6017 m_freem(m); 6018 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 6019 } 6020 } 6021 6022 /* XXX make it sysctl-configurable? */ 6023 static void 6024 key_getcomb_setlifetime(struct sadb_comb *comb) 6025 { 6026 6027 comb->sadb_comb_soft_allocations = 1; 6028 comb->sadb_comb_hard_allocations = 1; 6029 comb->sadb_comb_soft_bytes = 0; 6030 comb->sadb_comb_hard_bytes = 0; 6031 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 6032 comb->sadb_comb_soft_addtime = comb->sadb_comb_hard_addtime * 80 / 100; 6033 comb->sadb_comb_hard_usetime = 28800; /* 8 hours */ 6034 comb->sadb_comb_soft_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 6035 } 6036 6037 /* 6038 * XXX reorder combinations by preference 6039 * XXX no idea if the user wants ESP authentication or not 6040 */ 6041 static struct mbuf * 6042 key_getcomb_esp(void) 6043 { 6044 struct sadb_comb *comb; 6045 const struct enc_xform *algo; 6046 struct mbuf *result = NULL, *m, *n; 6047 int encmin; 6048 int i, off, o; 6049 int totlen; 6050 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6051 6052 m = NULL; 6053 for (i = 1; i <= SADB_EALG_MAX; i++) { 6054 algo = esp_algorithm_lookup(i); 6055 if (algo == NULL) 6056 continue; 6057 6058 /* discard algorithms with key size smaller than system min */ 6059 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 6060 continue; 6061 if (_BITS(algo->minkey) < ipsec_esp_keymin) 6062 encmin = ipsec_esp_keymin; 6063 else 6064 encmin = _BITS(algo->minkey); 6065 6066 if (ipsec_esp_auth) 6067 m = key_getcomb_ah(); 6068 else { 6069 KASSERTMSG(l <= MLEN, 6070 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6071 MGET(m, M_DONTWAIT, MT_DATA); 6072 if (m) { 6073 M_ALIGN(m, l); 6074 m->m_len = l; 6075 m->m_next = NULL; 6076 memset(mtod(m, void *), 0, m->m_len); 6077 } 6078 } 6079 if (!m) 6080 goto fail; 6081 6082 totlen = 0; 6083 for (n = m; n; n = n->m_next) 6084 totlen += n->m_len; 6085 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 6086 6087 for (off = 0; off < totlen; off += l) { 6088 n = m_pulldown(m, off, l, &o); 6089 if (!n) { 6090 /* m is already freed */ 6091 goto fail; 6092 } 6093 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6094 memset(comb, 0, sizeof(*comb)); 6095 key_getcomb_setlifetime(comb); 6096 comb->sadb_comb_encrypt = i; 6097 comb->sadb_comb_encrypt_minbits = encmin; 6098 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6099 } 6100 6101 if (!result) 6102 result = m; 6103 else 6104 m_cat(result, m); 6105 } 6106 6107 return result; 6108 6109 fail: 6110 if (result) 6111 m_freem(result); 6112 return NULL; 6113 } 6114 6115 static void 6116 key_getsizes_ah(const struct auth_hash *ah, int alg, 6117 u_int16_t* ksmin, u_int16_t* ksmax) 6118 { 6119 *ksmin = *ksmax = ah->keysize; 6120 if (ah->keysize == 0) { 6121 /* 6122 * Transform takes arbitrary key size but algorithm 6123 * key size is restricted. Enforce this here. 6124 */ 6125 switch (alg) { 6126 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6127 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6128 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6129 default: 6130 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 6131 break; 6132 } 6133 } 6134 } 6135 6136 /* 6137 * XXX reorder combinations by preference 6138 */ 6139 static struct mbuf * 6140 key_getcomb_ah(void) 6141 { 6142 struct sadb_comb *comb; 6143 const struct auth_hash *algo; 6144 struct mbuf *m; 6145 u_int16_t minkeysize, maxkeysize; 6146 int i; 6147 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6148 6149 m = NULL; 6150 for (i = 1; i <= SADB_AALG_MAX; i++) { 6151 #if 1 6152 /* we prefer HMAC algorithms, not old algorithms */ 6153 if (i != SADB_AALG_SHA1HMAC && 6154 i != SADB_AALG_MD5HMAC && 6155 i != SADB_X_AALG_SHA2_256 && 6156 i != SADB_X_AALG_SHA2_384 && 6157 i != SADB_X_AALG_SHA2_512) 6158 continue; 6159 #endif 6160 algo = ah_algorithm_lookup(i); 6161 if (!algo) 6162 continue; 6163 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6164 /* discard algorithms with key size smaller than system min */ 6165 if (_BITS(minkeysize) < ipsec_ah_keymin) 6166 continue; 6167 6168 if (!m) { 6169 KASSERTMSG(l <= MLEN, 6170 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6171 MGET(m, M_DONTWAIT, MT_DATA); 6172 if (m) { 6173 M_ALIGN(m, l); 6174 m->m_len = l; 6175 m->m_next = NULL; 6176 } 6177 } else 6178 M_PREPEND(m, l, M_DONTWAIT); 6179 if (!m) 6180 return NULL; 6181 6182 if (m->m_len < sizeof(struct sadb_comb)) { 6183 m = m_pullup(m, sizeof(struct sadb_comb)); 6184 if (m == NULL) 6185 return NULL; 6186 } 6187 6188 comb = mtod(m, struct sadb_comb *); 6189 memset(comb, 0, sizeof(*comb)); 6190 key_getcomb_setlifetime(comb); 6191 comb->sadb_comb_auth = i; 6192 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6193 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6194 } 6195 6196 return m; 6197 } 6198 6199 /* 6200 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6201 * XXX reorder combinations by preference 6202 */ 6203 static struct mbuf * 6204 key_getcomb_ipcomp(void) 6205 { 6206 struct sadb_comb *comb; 6207 const struct comp_algo *algo; 6208 struct mbuf *m; 6209 int i; 6210 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6211 6212 m = NULL; 6213 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6214 algo = ipcomp_algorithm_lookup(i); 6215 if (!algo) 6216 continue; 6217 6218 if (!m) { 6219 KASSERTMSG(l <= MLEN, 6220 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6221 MGET(m, M_DONTWAIT, MT_DATA); 6222 if (m) { 6223 M_ALIGN(m, l); 6224 m->m_len = l; 6225 m->m_next = NULL; 6226 } 6227 } else 6228 M_PREPEND(m, l, M_DONTWAIT); 6229 if (!m) 6230 return NULL; 6231 6232 if (m->m_len < sizeof(struct sadb_comb)) { 6233 m = m_pullup(m, sizeof(struct sadb_comb)); 6234 if (m == NULL) 6235 return NULL; 6236 } 6237 6238 comb = mtod(m, struct sadb_comb *); 6239 memset(comb, 0, sizeof(*comb)); 6240 key_getcomb_setlifetime(comb); 6241 comb->sadb_comb_encrypt = i; 6242 /* what should we set into sadb_comb_*_{min,max}bits? */ 6243 } 6244 6245 return m; 6246 } 6247 6248 /* 6249 * XXX no way to pass mode (transport/tunnel) to userland 6250 * XXX replay checking? 6251 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6252 */ 6253 static struct mbuf * 6254 key_getprop(const struct secasindex *saidx) 6255 { 6256 struct sadb_prop *prop; 6257 struct mbuf *m, *n; 6258 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6259 int totlen; 6260 6261 switch (saidx->proto) { 6262 case IPPROTO_ESP: 6263 m = key_getcomb_esp(); 6264 break; 6265 case IPPROTO_AH: 6266 m = key_getcomb_ah(); 6267 break; 6268 case IPPROTO_IPCOMP: 6269 m = key_getcomb_ipcomp(); 6270 break; 6271 default: 6272 return NULL; 6273 } 6274 6275 if (!m) 6276 return NULL; 6277 M_PREPEND(m, l, M_DONTWAIT); 6278 if (!m) 6279 return NULL; 6280 6281 totlen = 0; 6282 for (n = m; n; n = n->m_next) 6283 totlen += n->m_len; 6284 6285 prop = mtod(m, struct sadb_prop *); 6286 memset(prop, 0, sizeof(*prop)); 6287 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6288 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6289 prop->sadb_prop_replay = 32; /* XXX */ 6290 6291 return m; 6292 } 6293 6294 /* 6295 * SADB_ACQUIRE processing called by key_checkrequest() and key_api_acquire(). 6296 * send 6297 * <base, SA, address(SD), (address(P)), x_policy, 6298 * (identity(SD),) (sensitivity,) proposal> 6299 * to KMD, and expect to receive 6300 * <base> with SADB_ACQUIRE if error occurred, 6301 * or 6302 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6303 * from KMD by PF_KEY. 6304 * 6305 * XXX x_policy is outside of RFC2367 (KAME extension). 6306 * XXX sensitivity is not supported. 6307 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6308 * see comment for key_getcomb_ipcomp(). 6309 * 6310 * OUT: 6311 * 0 : succeed 6312 * others: error number 6313 */ 6314 static int 6315 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6316 { 6317 struct mbuf *result = NULL, *m; 6318 #ifndef IPSEC_NONBLOCK_ACQUIRE 6319 struct secacq *newacq; 6320 #endif 6321 u_int8_t satype; 6322 int error = -1; 6323 u_int32_t seq; 6324 6325 /* sanity check */ 6326 KASSERT(saidx != NULL); 6327 satype = key_proto2satype(saidx->proto); 6328 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6329 6330 #ifndef IPSEC_NONBLOCK_ACQUIRE 6331 /* 6332 * We never do anything about acquirng SA. There is anather 6333 * solution that kernel blocks to send SADB_ACQUIRE message until 6334 * getting something message from IKEd. In later case, to be 6335 * managed with ACQUIRING list. 6336 */ 6337 /* Get an entry to check whether sending message or not. */ 6338 mutex_enter(&key_misc.lock); 6339 newacq = key_getacq(saidx); 6340 if (newacq != NULL) { 6341 if (key_blockacq_count < newacq->count) { 6342 /* reset counter and do send message. */ 6343 newacq->count = 0; 6344 } else { 6345 /* increment counter and do nothing. */ 6346 newacq->count++; 6347 mutex_exit(&key_misc.lock); 6348 return 0; 6349 } 6350 } else { 6351 /* make new entry for blocking to send SADB_ACQUIRE. */ 6352 newacq = key_newacq(saidx); 6353 if (newacq == NULL) 6354 return ENOBUFS; 6355 6356 /* add to key_misc.acqlist */ 6357 LIST_INSERT_HEAD(&key_misc.acqlist, newacq, chain); 6358 } 6359 6360 seq = newacq->seq; 6361 mutex_exit(&key_misc.lock); 6362 #else 6363 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6364 #endif 6365 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6366 if (!m) { 6367 error = ENOBUFS; 6368 goto fail; 6369 } 6370 result = m; 6371 6372 /* set sadb_address for saidx's. */ 6373 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6374 IPSEC_ULPROTO_ANY); 6375 if (!m) { 6376 error = ENOBUFS; 6377 goto fail; 6378 } 6379 m_cat(result, m); 6380 6381 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6382 IPSEC_ULPROTO_ANY); 6383 if (!m) { 6384 error = ENOBUFS; 6385 goto fail; 6386 } 6387 m_cat(result, m); 6388 6389 /* XXX proxy address (optional) */ 6390 6391 /* set sadb_x_policy */ 6392 if (sp) { 6393 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6394 if (!m) { 6395 error = ENOBUFS; 6396 goto fail; 6397 } 6398 m_cat(result, m); 6399 } 6400 6401 /* XXX identity (optional) */ 6402 #if 0 6403 if (idexttype && fqdn) { 6404 /* create identity extension (FQDN) */ 6405 struct sadb_ident *id; 6406 int fqdnlen; 6407 6408 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6409 id = (struct sadb_ident *)p; 6410 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6411 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6412 id->sadb_ident_exttype = idexttype; 6413 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6414 memcpy(id + 1, fqdn, fqdnlen); 6415 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6416 } 6417 6418 if (idexttype) { 6419 /* create identity extension (USERFQDN) */ 6420 struct sadb_ident *id; 6421 int userfqdnlen; 6422 6423 if (userfqdn) { 6424 /* +1 for terminating-NUL */ 6425 userfqdnlen = strlen(userfqdn) + 1; 6426 } else 6427 userfqdnlen = 0; 6428 id = (struct sadb_ident *)p; 6429 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6430 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6431 id->sadb_ident_exttype = idexttype; 6432 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6433 /* XXX is it correct? */ 6434 if (curlwp) 6435 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6436 if (userfqdn && userfqdnlen) 6437 memcpy(id + 1, userfqdn, userfqdnlen); 6438 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6439 } 6440 #endif 6441 6442 /* XXX sensitivity (optional) */ 6443 6444 /* create proposal/combination extension */ 6445 m = key_getprop(saidx); 6446 #if 0 6447 /* 6448 * spec conformant: always attach proposal/combination extension, 6449 * the problem is that we have no way to attach it for ipcomp, 6450 * due to the way sadb_comb is declared in RFC2367. 6451 */ 6452 if (!m) { 6453 error = ENOBUFS; 6454 goto fail; 6455 } 6456 m_cat(result, m); 6457 #else 6458 /* 6459 * outside of spec; make proposal/combination extension optional. 6460 */ 6461 if (m) 6462 m_cat(result, m); 6463 #endif 6464 6465 if ((result->m_flags & M_PKTHDR) == 0) { 6466 error = EINVAL; 6467 goto fail; 6468 } 6469 6470 if (result->m_len < sizeof(struct sadb_msg)) { 6471 result = m_pullup(result, sizeof(struct sadb_msg)); 6472 if (result == NULL) { 6473 error = ENOBUFS; 6474 goto fail; 6475 } 6476 } 6477 6478 result->m_pkthdr.len = 0; 6479 for (m = result; m; m = m->m_next) 6480 result->m_pkthdr.len += m->m_len; 6481 6482 mtod(result, struct sadb_msg *)->sadb_msg_len = 6483 PFKEY_UNIT64(result->m_pkthdr.len); 6484 6485 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6486 6487 fail: 6488 if (result) 6489 m_freem(result); 6490 return error; 6491 } 6492 6493 #ifndef IPSEC_NONBLOCK_ACQUIRE 6494 static struct secacq * 6495 key_newacq(const struct secasindex *saidx) 6496 { 6497 struct secacq *newacq; 6498 6499 /* get new entry */ 6500 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6501 if (newacq == NULL) { 6502 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6503 return NULL; 6504 } 6505 6506 /* copy secindex */ 6507 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6508 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6509 newacq->created = time_uptime; 6510 newacq->count = 0; 6511 6512 return newacq; 6513 } 6514 6515 static struct secacq * 6516 key_getacq(const struct secasindex *saidx) 6517 { 6518 struct secacq *acq; 6519 6520 KASSERT(mutex_owned(&key_misc.lock)); 6521 6522 LIST_FOREACH(acq, &key_misc.acqlist, chain) { 6523 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6524 return acq; 6525 } 6526 6527 return NULL; 6528 } 6529 6530 static struct secacq * 6531 key_getacqbyseq(u_int32_t seq) 6532 { 6533 struct secacq *acq; 6534 6535 KASSERT(mutex_owned(&key_misc.lock)); 6536 6537 LIST_FOREACH(acq, &key_misc.acqlist, chain) { 6538 if (acq->seq == seq) 6539 return acq; 6540 } 6541 6542 return NULL; 6543 } 6544 #endif 6545 6546 #ifdef notyet 6547 static struct secspacq * 6548 key_newspacq(const struct secpolicyindex *spidx) 6549 { 6550 struct secspacq *acq; 6551 6552 /* get new entry */ 6553 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6554 if (acq == NULL) { 6555 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6556 return NULL; 6557 } 6558 6559 /* copy secindex */ 6560 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6561 acq->created = time_uptime; 6562 acq->count = 0; 6563 6564 return acq; 6565 } 6566 6567 static struct secspacq * 6568 key_getspacq(const struct secpolicyindex *spidx) 6569 { 6570 struct secspacq *acq; 6571 6572 LIST_FOREACH(acq, &key_misc.spacqlist, chain) { 6573 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6574 return acq; 6575 } 6576 6577 return NULL; 6578 } 6579 #endif /* notyet */ 6580 6581 /* 6582 * SADB_ACQUIRE processing, 6583 * in first situation, is receiving 6584 * <base> 6585 * from the ikmpd, and clear sequence of its secasvar entry. 6586 * 6587 * In second situation, is receiving 6588 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6589 * from a user land process, and return 6590 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6591 * to the socket. 6592 * 6593 * m will always be freed. 6594 */ 6595 static int 6596 key_api_acquire(struct socket *so, struct mbuf *m, 6597 const struct sadb_msghdr *mhp) 6598 { 6599 const struct sockaddr *src, *dst; 6600 struct secasindex saidx; 6601 struct secashead *sah; 6602 u_int16_t proto; 6603 int error; 6604 6605 /* 6606 * Error message from KMd. 6607 * We assume that if error was occurred in IKEd, the length of PFKEY 6608 * message is equal to the size of sadb_msg structure. 6609 * We do not raise error even if error occurred in this function. 6610 */ 6611 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6612 #ifndef IPSEC_NONBLOCK_ACQUIRE 6613 struct secacq *acq; 6614 6615 /* check sequence number */ 6616 if (mhp->msg->sadb_msg_seq == 0) { 6617 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 6618 m_freem(m); 6619 return 0; 6620 } 6621 6622 mutex_enter(&key_misc.lock); 6623 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 6624 if (acq == NULL) { 6625 mutex_exit(&key_misc.lock); 6626 /* 6627 * the specified larval SA is already gone, or we got 6628 * a bogus sequence number. we can silently ignore it. 6629 */ 6630 m_freem(m); 6631 return 0; 6632 } 6633 6634 /* reset acq counter in order to deletion by timehander. */ 6635 acq->created = time_uptime; 6636 acq->count = 0; 6637 mutex_exit(&key_misc.lock); 6638 #endif 6639 m_freem(m); 6640 return 0; 6641 } 6642 6643 /* 6644 * This message is from user land. 6645 */ 6646 6647 /* map satype to proto */ 6648 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6649 if (proto == 0) { 6650 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6651 return key_senderror(so, m, EINVAL); 6652 } 6653 6654 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6655 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6656 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6657 /* error */ 6658 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6659 return key_senderror(so, m, EINVAL); 6660 } 6661 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6662 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6663 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6664 /* error */ 6665 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6666 return key_senderror(so, m, EINVAL); 6667 } 6668 6669 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6670 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6671 6672 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6673 if (error != 0) 6674 return key_senderror(so, m, EINVAL); 6675 6676 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6677 if (error != 0) 6678 return key_senderror(so, m, EINVAL); 6679 6680 /* get a SA index */ 6681 sah = key_getsah(&saidx, CMP_MODE_REQID); 6682 if (sah != NULL) { 6683 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 6684 return key_senderror(so, m, EEXIST); 6685 } 6686 6687 error = key_acquire(&saidx, NULL); 6688 if (error != 0) { 6689 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 6690 error); 6691 return key_senderror(so, m, error); 6692 } 6693 6694 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6695 } 6696 6697 /* 6698 * SADB_REGISTER processing. 6699 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6700 * receive 6701 * <base> 6702 * from the ikmpd, and register a socket to send PF_KEY messages, 6703 * and send 6704 * <base, supported> 6705 * to KMD by PF_KEY. 6706 * If socket is detached, must free from regnode. 6707 * 6708 * m will always be freed. 6709 */ 6710 static int 6711 key_api_register(struct socket *so, struct mbuf *m, 6712 const struct sadb_msghdr *mhp) 6713 { 6714 struct secreg *reg, *newreg = 0; 6715 6716 /* check for invalid register message */ 6717 if (mhp->msg->sadb_msg_satype >= __arraycount(key_misc.reglist)) 6718 return key_senderror(so, m, EINVAL); 6719 6720 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6721 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6722 goto setmsg; 6723 6724 /* Allocate regnode in advance, out of mutex */ 6725 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 6726 6727 /* check whether existing or not */ 6728 mutex_enter(&key_misc.lock); 6729 LIST_FOREACH(reg, &key_misc.reglist[mhp->msg->sadb_msg_satype], chain) { 6730 if (reg->so == so) { 6731 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 6732 mutex_exit(&key_misc.lock); 6733 kmem_free(newreg, sizeof(*newreg)); 6734 return key_senderror(so, m, EEXIST); 6735 } 6736 } 6737 6738 newreg->so = so; 6739 ((struct keycb *)sotorawcb(so))->kp_registered++; 6740 6741 /* add regnode to key_misc.reglist. */ 6742 LIST_INSERT_HEAD(&key_misc.reglist[mhp->msg->sadb_msg_satype], newreg, chain); 6743 mutex_exit(&key_misc.lock); 6744 6745 setmsg: 6746 { 6747 struct mbuf *n; 6748 struct sadb_supported *sup; 6749 u_int len, alen, elen; 6750 int off; 6751 int i; 6752 struct sadb_alg *alg; 6753 6754 /* create new sadb_msg to reply. */ 6755 alen = 0; 6756 for (i = 1; i <= SADB_AALG_MAX; i++) { 6757 if (ah_algorithm_lookup(i)) 6758 alen += sizeof(struct sadb_alg); 6759 } 6760 if (alen) 6761 alen += sizeof(struct sadb_supported); 6762 elen = 0; 6763 for (i = 1; i <= SADB_EALG_MAX; i++) { 6764 if (esp_algorithm_lookup(i)) 6765 elen += sizeof(struct sadb_alg); 6766 } 6767 if (elen) 6768 elen += sizeof(struct sadb_supported); 6769 6770 len = sizeof(struct sadb_msg) + alen + elen; 6771 6772 if (len > MCLBYTES) 6773 return key_senderror(so, m, ENOBUFS); 6774 6775 MGETHDR(n, M_DONTWAIT, MT_DATA); 6776 if (len > MHLEN) { 6777 MCLGET(n, M_DONTWAIT); 6778 if ((n->m_flags & M_EXT) == 0) { 6779 m_freem(n); 6780 n = NULL; 6781 } 6782 } 6783 if (!n) 6784 return key_senderror(so, m, ENOBUFS); 6785 6786 n->m_pkthdr.len = n->m_len = len; 6787 n->m_next = NULL; 6788 off = 0; 6789 6790 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6791 n = key_fill_replymsg(n, 0); 6792 if (n == NULL) 6793 return key_senderror(so, m, ENOBUFS); 6794 6795 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6796 6797 /* for authentication algorithm */ 6798 if (alen) { 6799 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6800 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6801 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6802 off += PFKEY_ALIGN8(sizeof(*sup)); 6803 6804 for (i = 1; i <= SADB_AALG_MAX; i++) { 6805 const struct auth_hash *aalgo; 6806 u_int16_t minkeysize, maxkeysize; 6807 6808 aalgo = ah_algorithm_lookup(i); 6809 if (!aalgo) 6810 continue; 6811 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6812 alg->sadb_alg_id = i; 6813 alg->sadb_alg_ivlen = 0; 6814 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6815 alg->sadb_alg_minbits = _BITS(minkeysize); 6816 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6817 off += PFKEY_ALIGN8(sizeof(*alg)); 6818 } 6819 } 6820 6821 /* for encryption algorithm */ 6822 if (elen) { 6823 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6824 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6825 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6826 off += PFKEY_ALIGN8(sizeof(*sup)); 6827 6828 for (i = 1; i <= SADB_EALG_MAX; i++) { 6829 const struct enc_xform *ealgo; 6830 6831 ealgo = esp_algorithm_lookup(i); 6832 if (!ealgo) 6833 continue; 6834 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6835 alg->sadb_alg_id = i; 6836 alg->sadb_alg_ivlen = ealgo->blocksize; 6837 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6838 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6839 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6840 } 6841 } 6842 6843 KASSERTMSG(off == len, "length inconsistency"); 6844 6845 m_freem(m); 6846 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6847 } 6848 } 6849 6850 /* 6851 * free secreg entry registered. 6852 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6853 */ 6854 void 6855 key_freereg(struct socket *so) 6856 { 6857 struct secreg *reg; 6858 int i; 6859 6860 KASSERT(!cpu_softintr_p()); 6861 KASSERT(so != NULL); 6862 6863 /* 6864 * check whether existing or not. 6865 * check all type of SA, because there is a potential that 6866 * one socket is registered to multiple type of SA. 6867 */ 6868 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6869 mutex_enter(&key_misc.lock); 6870 LIST_FOREACH(reg, &key_misc.reglist[i], chain) { 6871 if (reg->so == so) { 6872 LIST_REMOVE(reg, chain); 6873 break; 6874 } 6875 } 6876 mutex_exit(&key_misc.lock); 6877 if (reg != NULL) 6878 kmem_free(reg, sizeof(*reg)); 6879 } 6880 6881 return; 6882 } 6883 6884 /* 6885 * SADB_EXPIRE processing 6886 * send 6887 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6888 * to KMD by PF_KEY. 6889 * NOTE: We send only soft lifetime extension. 6890 * 6891 * OUT: 0 : succeed 6892 * others : error number 6893 */ 6894 static int 6895 key_expire(struct secasvar *sav) 6896 { 6897 int s; 6898 int satype; 6899 struct mbuf *result = NULL, *m; 6900 int len; 6901 int error = -1; 6902 struct sadb_lifetime *lt; 6903 6904 /* XXX: Why do we lock ? */ 6905 s = splsoftnet(); /*called from softclock()*/ 6906 6907 KASSERT(sav != NULL); 6908 6909 satype = key_proto2satype(sav->sah->saidx.proto); 6910 KASSERTMSG(satype != 0, "invalid proto is passed"); 6911 6912 /* set msg header */ 6913 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6914 if (!m) { 6915 error = ENOBUFS; 6916 goto fail; 6917 } 6918 result = m; 6919 6920 /* create SA extension */ 6921 m = key_setsadbsa(sav); 6922 if (!m) { 6923 error = ENOBUFS; 6924 goto fail; 6925 } 6926 m_cat(result, m); 6927 6928 /* create SA extension */ 6929 m = key_setsadbxsa2(sav->sah->saidx.mode, 6930 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 6931 if (!m) { 6932 error = ENOBUFS; 6933 goto fail; 6934 } 6935 m_cat(result, m); 6936 6937 /* create lifetime extension (current and soft) */ 6938 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6939 m = key_alloc_mbuf(len); 6940 if (!m || m->m_next) { /*XXX*/ 6941 if (m) 6942 m_freem(m); 6943 error = ENOBUFS; 6944 goto fail; 6945 } 6946 memset(mtod(m, void *), 0, len); 6947 lt = mtod(m, struct sadb_lifetime *); 6948 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6949 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6950 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6951 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6952 lt->sadb_lifetime_addtime = 6953 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 6954 lt->sadb_lifetime_usetime = 6955 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 6956 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6957 memcpy(lt, sav->lft_s, sizeof(*lt)); 6958 m_cat(result, m); 6959 6960 /* set sadb_address for source */ 6961 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 6962 FULLMASK, IPSEC_ULPROTO_ANY); 6963 if (!m) { 6964 error = ENOBUFS; 6965 goto fail; 6966 } 6967 m_cat(result, m); 6968 6969 /* set sadb_address for destination */ 6970 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 6971 FULLMASK, IPSEC_ULPROTO_ANY); 6972 if (!m) { 6973 error = ENOBUFS; 6974 goto fail; 6975 } 6976 m_cat(result, m); 6977 6978 if ((result->m_flags & M_PKTHDR) == 0) { 6979 error = EINVAL; 6980 goto fail; 6981 } 6982 6983 if (result->m_len < sizeof(struct sadb_msg)) { 6984 result = m_pullup(result, sizeof(struct sadb_msg)); 6985 if (result == NULL) { 6986 error = ENOBUFS; 6987 goto fail; 6988 } 6989 } 6990 6991 result->m_pkthdr.len = 0; 6992 for (m = result; m; m = m->m_next) 6993 result->m_pkthdr.len += m->m_len; 6994 6995 mtod(result, struct sadb_msg *)->sadb_msg_len = 6996 PFKEY_UNIT64(result->m_pkthdr.len); 6997 6998 splx(s); 6999 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7000 7001 fail: 7002 if (result) 7003 m_freem(result); 7004 splx(s); 7005 return error; 7006 } 7007 7008 /* 7009 * SADB_FLUSH processing 7010 * receive 7011 * <base> 7012 * from the ikmpd, and free all entries in secastree. 7013 * and send, 7014 * <base> 7015 * to the ikmpd. 7016 * NOTE: to do is only marking SADB_SASTATE_DEAD. 7017 * 7018 * m will always be freed. 7019 */ 7020 static int 7021 key_api_flush(struct socket *so, struct mbuf *m, 7022 const struct sadb_msghdr *mhp) 7023 { 7024 struct sadb_msg *newmsg; 7025 struct secashead *sah; 7026 struct secasvar *sav; 7027 u_int16_t proto; 7028 u_int8_t state; 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 /* no SATYPE specified, i.e. flushing all SA. */ 7038 SAHLIST_READER_FOREACH(sah) { 7039 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 7040 proto != sah->saidx.proto) 7041 continue; 7042 7043 SASTATE_ALIVE_FOREACH(state) { 7044 restart: 7045 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7046 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7047 KEY_FREESAV(&sav); 7048 goto restart; 7049 } 7050 } 7051 7052 sah->state = SADB_SASTATE_DEAD; 7053 } 7054 7055 if (m->m_len < sizeof(struct sadb_msg) || 7056 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7057 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 7058 return key_senderror(so, m, ENOBUFS); 7059 } 7060 7061 if (m->m_next) 7062 m_freem(m->m_next); 7063 m->m_next = NULL; 7064 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7065 newmsg = mtod(m, struct sadb_msg *); 7066 newmsg->sadb_msg_errno = 0; 7067 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7068 7069 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7070 } 7071 7072 7073 static struct mbuf * 7074 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7075 { 7076 struct secashead *sah; 7077 struct secasvar *sav; 7078 u_int16_t proto; 7079 u_int8_t satype; 7080 u_int8_t state; 7081 int cnt; 7082 struct mbuf *m, *n, *prev; 7083 7084 KASSERT(mutex_owned(&key_sad.lock)); 7085 7086 *lenp = 0; 7087 7088 /* map satype to proto */ 7089 proto = key_satype2proto(req_satype); 7090 if (proto == 0) { 7091 *errorp = EINVAL; 7092 return (NULL); 7093 } 7094 7095 /* count sav entries to be sent to userland. */ 7096 cnt = 0; 7097 SAHLIST_WRITER_FOREACH(sah) { 7098 if (req_satype != SADB_SATYPE_UNSPEC && 7099 proto != sah->saidx.proto) 7100 continue; 7101 7102 SASTATE_ANY_FOREACH(state) { 7103 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7104 cnt++; 7105 } 7106 } 7107 } 7108 7109 if (cnt == 0) { 7110 *errorp = ENOENT; 7111 return (NULL); 7112 } 7113 7114 /* send this to the userland, one at a time. */ 7115 m = NULL; 7116 prev = m; 7117 SAHLIST_WRITER_FOREACH(sah) { 7118 if (req_satype != SADB_SATYPE_UNSPEC && 7119 proto != sah->saidx.proto) 7120 continue; 7121 7122 /* map proto to satype */ 7123 satype = key_proto2satype(sah->saidx.proto); 7124 if (satype == 0) { 7125 m_freem(m); 7126 *errorp = EINVAL; 7127 return (NULL); 7128 } 7129 7130 SASTATE_ANY_FOREACH(state) { 7131 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7132 n = key_setdumpsa(sav, SADB_DUMP, satype, 7133 --cnt, pid); 7134 if (!n) { 7135 m_freem(m); 7136 *errorp = ENOBUFS; 7137 return (NULL); 7138 } 7139 7140 if (!m) 7141 m = n; 7142 else 7143 prev->m_nextpkt = n; 7144 prev = n; 7145 } 7146 } 7147 } 7148 7149 if (!m) { 7150 *errorp = EINVAL; 7151 return (NULL); 7152 } 7153 7154 if ((m->m_flags & M_PKTHDR) != 0) { 7155 m->m_pkthdr.len = 0; 7156 for (n = m; n; n = n->m_next) 7157 m->m_pkthdr.len += n->m_len; 7158 } 7159 7160 *errorp = 0; 7161 return (m); 7162 } 7163 7164 /* 7165 * SADB_DUMP processing 7166 * dump all entries including status of DEAD in SAD. 7167 * receive 7168 * <base> 7169 * from the ikmpd, and dump all secasvar leaves 7170 * and send, 7171 * <base> ..... 7172 * to the ikmpd. 7173 * 7174 * m will always be freed. 7175 */ 7176 static int 7177 key_api_dump(struct socket *so, struct mbuf *m0, 7178 const struct sadb_msghdr *mhp) 7179 { 7180 u_int16_t proto; 7181 u_int8_t satype; 7182 struct mbuf *n; 7183 int error, len, ok; 7184 7185 /* map satype to proto */ 7186 satype = mhp->msg->sadb_msg_satype; 7187 proto = key_satype2proto(satype); 7188 if (proto == 0) { 7189 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7190 return key_senderror(so, m0, EINVAL); 7191 } 7192 7193 /* 7194 * If the requestor has insufficient socket-buffer space 7195 * for the entire chain, nobody gets any response to the DUMP. 7196 * XXX For now, only the requestor ever gets anything. 7197 * Moreover, if the requestor has any space at all, they receive 7198 * the entire chain, otherwise the request is refused with ENOBUFS. 7199 */ 7200 if (sbspace(&so->so_rcv) <= 0) { 7201 return key_senderror(so, m0, ENOBUFS); 7202 } 7203 7204 mutex_enter(&key_sad.lock); 7205 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7206 mutex_exit(&key_sad.lock); 7207 7208 if (n == NULL) { 7209 return key_senderror(so, m0, ENOENT); 7210 } 7211 { 7212 uint64_t *ps = PFKEY_STAT_GETREF(); 7213 ps[PFKEY_STAT_IN_TOTAL]++; 7214 ps[PFKEY_STAT_IN_BYTES] += len; 7215 PFKEY_STAT_PUTREF(); 7216 } 7217 7218 /* 7219 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7220 * The requestor receives either the entire chain, or an 7221 * error message with ENOBUFS. 7222 * 7223 * sbappendaddrchain() takes the chain of entries, one 7224 * packet-record per SPD entry, prepends the key_src sockaddr 7225 * to each packet-record, links the sockaddr mbufs into a new 7226 * list of records, then appends the entire resulting 7227 * list to the requesting socket. 7228 */ 7229 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7230 SB_PRIO_ONESHOT_OVERFLOW); 7231 7232 if (!ok) { 7233 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7234 m_freem(n); 7235 return key_senderror(so, m0, ENOBUFS); 7236 } 7237 7238 m_freem(m0); 7239 return 0; 7240 } 7241 7242 /* 7243 * SADB_X_PROMISC processing 7244 * 7245 * m will always be freed. 7246 */ 7247 static int 7248 key_api_promisc(struct socket *so, struct mbuf *m, 7249 const struct sadb_msghdr *mhp) 7250 { 7251 int olen; 7252 7253 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7254 7255 if (olen < sizeof(struct sadb_msg)) { 7256 #if 1 7257 return key_senderror(so, m, EINVAL); 7258 #else 7259 m_freem(m); 7260 return 0; 7261 #endif 7262 } else if (olen == sizeof(struct sadb_msg)) { 7263 /* enable/disable promisc mode */ 7264 struct keycb *kp = (struct keycb *)sotorawcb(so); 7265 if (kp == NULL) 7266 return key_senderror(so, m, EINVAL); 7267 mhp->msg->sadb_msg_errno = 0; 7268 switch (mhp->msg->sadb_msg_satype) { 7269 case 0: 7270 case 1: 7271 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7272 break; 7273 default: 7274 return key_senderror(so, m, EINVAL); 7275 } 7276 7277 /* send the original message back to everyone */ 7278 mhp->msg->sadb_msg_errno = 0; 7279 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7280 } else { 7281 /* send packet as is */ 7282 7283 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7284 7285 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7286 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7287 } 7288 } 7289 7290 static int (*key_api_typesw[]) (struct socket *, struct mbuf *, 7291 const struct sadb_msghdr *) = { 7292 NULL, /* SADB_RESERVED */ 7293 key_api_getspi, /* SADB_GETSPI */ 7294 key_api_update, /* SADB_UPDATE */ 7295 key_api_add, /* SADB_ADD */ 7296 key_api_delete, /* SADB_DELETE */ 7297 key_api_get, /* SADB_GET */ 7298 key_api_acquire, /* SADB_ACQUIRE */ 7299 key_api_register, /* SADB_REGISTER */ 7300 NULL, /* SADB_EXPIRE */ 7301 key_api_flush, /* SADB_FLUSH */ 7302 key_api_dump, /* SADB_DUMP */ 7303 key_api_promisc, /* SADB_X_PROMISC */ 7304 NULL, /* SADB_X_PCHANGE */ 7305 key_api_spdadd, /* SADB_X_SPDUPDATE */ 7306 key_api_spdadd, /* SADB_X_SPDADD */ 7307 key_api_spddelete, /* SADB_X_SPDDELETE */ 7308 key_api_spdget, /* SADB_X_SPDGET */ 7309 NULL, /* SADB_X_SPDACQUIRE */ 7310 key_api_spddump, /* SADB_X_SPDDUMP */ 7311 key_api_spdflush, /* SADB_X_SPDFLUSH */ 7312 key_api_spdadd, /* SADB_X_SPDSETIDX */ 7313 NULL, /* SADB_X_SPDEXPIRE */ 7314 key_api_spddelete2, /* SADB_X_SPDDELETE2 */ 7315 key_api_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7316 }; 7317 7318 /* 7319 * parse sadb_msg buffer to process PFKEYv2, 7320 * and create a data to response if needed. 7321 * I think to be dealed with mbuf directly. 7322 * IN: 7323 * msgp : pointer to pointer to a received buffer pulluped. 7324 * This is rewrited to response. 7325 * so : pointer to socket. 7326 * OUT: 7327 * length for buffer to send to user process. 7328 */ 7329 int 7330 key_parse(struct mbuf *m, struct socket *so) 7331 { 7332 struct sadb_msg *msg; 7333 struct sadb_msghdr mh; 7334 u_int orglen; 7335 int error; 7336 7337 KASSERT(m != NULL); 7338 KASSERT(so != NULL); 7339 7340 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7341 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7342 IPSECLOG(LOG_DEBUG, "passed sadb_msg\n"); 7343 kdebug_sadb(msg); 7344 } 7345 #endif 7346 7347 if (m->m_len < sizeof(struct sadb_msg)) { 7348 m = m_pullup(m, sizeof(struct sadb_msg)); 7349 if (!m) 7350 return ENOBUFS; 7351 } 7352 msg = mtod(m, struct sadb_msg *); 7353 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7354 7355 if ((m->m_flags & M_PKTHDR) == 0 || 7356 m->m_pkthdr.len != orglen) { 7357 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7358 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7359 error = EINVAL; 7360 goto senderror; 7361 } 7362 7363 if (msg->sadb_msg_version != PF_KEY_V2) { 7364 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7365 msg->sadb_msg_version); 7366 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7367 error = EINVAL; 7368 goto senderror; 7369 } 7370 7371 if (msg->sadb_msg_type > SADB_MAX) { 7372 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7373 msg->sadb_msg_type); 7374 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7375 error = EINVAL; 7376 goto senderror; 7377 } 7378 7379 /* for old-fashioned code - should be nuked */ 7380 if (m->m_pkthdr.len > MCLBYTES) { 7381 m_freem(m); 7382 return ENOBUFS; 7383 } 7384 if (m->m_next) { 7385 struct mbuf *n; 7386 7387 MGETHDR(n, M_DONTWAIT, MT_DATA); 7388 if (n && m->m_pkthdr.len > MHLEN) { 7389 MCLGET(n, M_DONTWAIT); 7390 if ((n->m_flags & M_EXT) == 0) { 7391 m_free(n); 7392 n = NULL; 7393 } 7394 } 7395 if (!n) { 7396 m_freem(m); 7397 return ENOBUFS; 7398 } 7399 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7400 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7401 n->m_next = NULL; 7402 m_freem(m); 7403 m = n; 7404 } 7405 7406 /* align the mbuf chain so that extensions are in contiguous region. */ 7407 error = key_align(m, &mh); 7408 if (error) 7409 return error; 7410 7411 if (m->m_next) { /*XXX*/ 7412 m_freem(m); 7413 return ENOBUFS; 7414 } 7415 7416 msg = mh.msg; 7417 7418 /* check SA type */ 7419 switch (msg->sadb_msg_satype) { 7420 case SADB_SATYPE_UNSPEC: 7421 switch (msg->sadb_msg_type) { 7422 case SADB_GETSPI: 7423 case SADB_UPDATE: 7424 case SADB_ADD: 7425 case SADB_DELETE: 7426 case SADB_GET: 7427 case SADB_ACQUIRE: 7428 case SADB_EXPIRE: 7429 IPSECLOG(LOG_DEBUG, 7430 "must specify satype when msg type=%u.\n", 7431 msg->sadb_msg_type); 7432 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7433 error = EINVAL; 7434 goto senderror; 7435 } 7436 break; 7437 case SADB_SATYPE_AH: 7438 case SADB_SATYPE_ESP: 7439 case SADB_X_SATYPE_IPCOMP: 7440 case SADB_X_SATYPE_TCPSIGNATURE: 7441 switch (msg->sadb_msg_type) { 7442 case SADB_X_SPDADD: 7443 case SADB_X_SPDDELETE: 7444 case SADB_X_SPDGET: 7445 case SADB_X_SPDDUMP: 7446 case SADB_X_SPDFLUSH: 7447 case SADB_X_SPDSETIDX: 7448 case SADB_X_SPDUPDATE: 7449 case SADB_X_SPDDELETE2: 7450 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7451 msg->sadb_msg_type); 7452 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7453 error = EINVAL; 7454 goto senderror; 7455 } 7456 break; 7457 case SADB_SATYPE_RSVP: 7458 case SADB_SATYPE_OSPFV2: 7459 case SADB_SATYPE_RIPV2: 7460 case SADB_SATYPE_MIP: 7461 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7462 msg->sadb_msg_satype); 7463 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7464 error = EOPNOTSUPP; 7465 goto senderror; 7466 case 1: /* XXX: What does it do? */ 7467 if (msg->sadb_msg_type == SADB_X_PROMISC) 7468 break; 7469 /*FALLTHROUGH*/ 7470 default: 7471 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7472 msg->sadb_msg_satype); 7473 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7474 error = EINVAL; 7475 goto senderror; 7476 } 7477 7478 /* check field of upper layer protocol and address family */ 7479 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7480 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7481 struct sadb_address *src0, *dst0; 7482 u_int plen; 7483 7484 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7485 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7486 7487 /* check upper layer protocol */ 7488 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7489 IPSECLOG(LOG_DEBUG, "upper layer protocol mismatched.\n"); 7490 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7491 error = EINVAL; 7492 goto senderror; 7493 } 7494 7495 /* check family */ 7496 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7497 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7498 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7499 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7500 error = EINVAL; 7501 goto senderror; 7502 } 7503 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7504 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7505 IPSECLOG(LOG_DEBUG, 7506 "address struct size mismatched.\n"); 7507 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7508 error = EINVAL; 7509 goto senderror; 7510 } 7511 7512 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7513 case AF_INET: 7514 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7515 sizeof(struct sockaddr_in)) { 7516 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7517 error = EINVAL; 7518 goto senderror; 7519 } 7520 break; 7521 case AF_INET6: 7522 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7523 sizeof(struct sockaddr_in6)) { 7524 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7525 error = EINVAL; 7526 goto senderror; 7527 } 7528 break; 7529 default: 7530 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7531 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7532 error = EAFNOSUPPORT; 7533 goto senderror; 7534 } 7535 7536 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7537 case AF_INET: 7538 plen = sizeof(struct in_addr) << 3; 7539 break; 7540 case AF_INET6: 7541 plen = sizeof(struct in6_addr) << 3; 7542 break; 7543 default: 7544 plen = 0; /*fool gcc*/ 7545 break; 7546 } 7547 7548 /* check max prefix length */ 7549 if (src0->sadb_address_prefixlen > plen || 7550 dst0->sadb_address_prefixlen > plen) { 7551 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7552 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7553 error = EINVAL; 7554 goto senderror; 7555 } 7556 7557 /* 7558 * prefixlen == 0 is valid because there can be a case when 7559 * all addresses are matched. 7560 */ 7561 } 7562 7563 if (msg->sadb_msg_type >= __arraycount(key_api_typesw) || 7564 key_api_typesw[msg->sadb_msg_type] == NULL) { 7565 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7566 error = EINVAL; 7567 goto senderror; 7568 } 7569 7570 return (*key_api_typesw[msg->sadb_msg_type])(so, m, &mh); 7571 7572 senderror: 7573 return key_senderror(so, m, error); 7574 } 7575 7576 static int 7577 key_senderror(struct socket *so, struct mbuf *m, int code) 7578 { 7579 struct sadb_msg *msg; 7580 7581 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7582 7583 msg = mtod(m, struct sadb_msg *); 7584 msg->sadb_msg_errno = code; 7585 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7586 } 7587 7588 /* 7589 * set the pointer to each header into message buffer. 7590 * m will be freed on error. 7591 * XXX larger-than-MCLBYTES extension? 7592 */ 7593 static int 7594 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7595 { 7596 struct mbuf *n; 7597 struct sadb_ext *ext; 7598 size_t off, end; 7599 int extlen; 7600 int toff; 7601 7602 KASSERT(m != NULL); 7603 KASSERT(mhp != NULL); 7604 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7605 7606 /* initialize */ 7607 memset(mhp, 0, sizeof(*mhp)); 7608 7609 mhp->msg = mtod(m, struct sadb_msg *); 7610 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7611 7612 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7613 extlen = end; /*just in case extlen is not updated*/ 7614 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7615 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7616 if (!n) { 7617 /* m is already freed */ 7618 return ENOBUFS; 7619 } 7620 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7621 7622 /* set pointer */ 7623 switch (ext->sadb_ext_type) { 7624 case SADB_EXT_SA: 7625 case SADB_EXT_ADDRESS_SRC: 7626 case SADB_EXT_ADDRESS_DST: 7627 case SADB_EXT_ADDRESS_PROXY: 7628 case SADB_EXT_LIFETIME_CURRENT: 7629 case SADB_EXT_LIFETIME_HARD: 7630 case SADB_EXT_LIFETIME_SOFT: 7631 case SADB_EXT_KEY_AUTH: 7632 case SADB_EXT_KEY_ENCRYPT: 7633 case SADB_EXT_IDENTITY_SRC: 7634 case SADB_EXT_IDENTITY_DST: 7635 case SADB_EXT_SENSITIVITY: 7636 case SADB_EXT_PROPOSAL: 7637 case SADB_EXT_SUPPORTED_AUTH: 7638 case SADB_EXT_SUPPORTED_ENCRYPT: 7639 case SADB_EXT_SPIRANGE: 7640 case SADB_X_EXT_POLICY: 7641 case SADB_X_EXT_SA2: 7642 case SADB_X_EXT_NAT_T_TYPE: 7643 case SADB_X_EXT_NAT_T_SPORT: 7644 case SADB_X_EXT_NAT_T_DPORT: 7645 case SADB_X_EXT_NAT_T_OAI: 7646 case SADB_X_EXT_NAT_T_OAR: 7647 case SADB_X_EXT_NAT_T_FRAG: 7648 /* duplicate check */ 7649 /* 7650 * XXX Are there duplication payloads of either 7651 * KEY_AUTH or KEY_ENCRYPT ? 7652 */ 7653 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7654 IPSECLOG(LOG_DEBUG, 7655 "duplicate ext_type %u is passed.\n", 7656 ext->sadb_ext_type); 7657 m_freem(m); 7658 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7659 return EINVAL; 7660 } 7661 break; 7662 default: 7663 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 7664 ext->sadb_ext_type); 7665 m_freem(m); 7666 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7667 return EINVAL; 7668 } 7669 7670 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7671 7672 if (key_validate_ext(ext, extlen)) { 7673 m_freem(m); 7674 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7675 return EINVAL; 7676 } 7677 7678 n = m_pulldown(m, off, extlen, &toff); 7679 if (!n) { 7680 /* m is already freed */ 7681 return ENOBUFS; 7682 } 7683 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7684 7685 mhp->ext[ext->sadb_ext_type] = ext; 7686 mhp->extoff[ext->sadb_ext_type] = off; 7687 mhp->extlen[ext->sadb_ext_type] = extlen; 7688 } 7689 7690 if (off != end) { 7691 m_freem(m); 7692 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7693 return EINVAL; 7694 } 7695 7696 return 0; 7697 } 7698 7699 static int 7700 key_validate_ext(const struct sadb_ext *ext, int len) 7701 { 7702 const struct sockaddr *sa; 7703 enum { NONE, ADDR } checktype = NONE; 7704 int baselen = 0; 7705 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7706 7707 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7708 return EINVAL; 7709 7710 /* if it does not match minimum/maximum length, bail */ 7711 if (ext->sadb_ext_type >= __arraycount(minsize) || 7712 ext->sadb_ext_type >= __arraycount(maxsize)) 7713 return EINVAL; 7714 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7715 return EINVAL; 7716 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7717 return EINVAL; 7718 7719 /* more checks based on sadb_ext_type XXX need more */ 7720 switch (ext->sadb_ext_type) { 7721 case SADB_EXT_ADDRESS_SRC: 7722 case SADB_EXT_ADDRESS_DST: 7723 case SADB_EXT_ADDRESS_PROXY: 7724 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7725 checktype = ADDR; 7726 break; 7727 case SADB_EXT_IDENTITY_SRC: 7728 case SADB_EXT_IDENTITY_DST: 7729 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7730 SADB_X_IDENTTYPE_ADDR) { 7731 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7732 checktype = ADDR; 7733 } else 7734 checktype = NONE; 7735 break; 7736 default: 7737 checktype = NONE; 7738 break; 7739 } 7740 7741 switch (checktype) { 7742 case NONE: 7743 break; 7744 case ADDR: 7745 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7746 if (len < baselen + sal) 7747 return EINVAL; 7748 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7749 return EINVAL; 7750 break; 7751 } 7752 7753 return 0; 7754 } 7755 7756 static int 7757 key_do_init(void) 7758 { 7759 int i, error; 7760 7761 mutex_init(&key_misc.lock, MUTEX_DEFAULT, IPL_NONE); 7762 key_psz = pserialize_create(); 7763 mutex_init(&key_spd.lock, MUTEX_DEFAULT, IPL_NONE); 7764 cv_init(&key_spd.cv, "key_sp"); 7765 mutex_init(&key_sad.lock, MUTEX_DEFAULT, IPL_NONE); 7766 7767 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7768 7769 callout_init(&key_timehandler_ch, 0); 7770 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 7771 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 7772 if (error != 0) 7773 panic("%s: workqueue_create failed (%d)\n", __func__, error); 7774 7775 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7776 PSLIST_INIT(&key_spd.splist[i]); 7777 } 7778 7779 PSLIST_INIT(&key_spd.socksplist); 7780 7781 PSLIST_INIT(&key_sad.sahlist); 7782 7783 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7784 LIST_INIT(&key_misc.reglist[i]); 7785 } 7786 7787 #ifndef IPSEC_NONBLOCK_ACQUIRE 7788 LIST_INIT(&key_misc.acqlist); 7789 #endif 7790 #ifdef notyet 7791 LIST_INIT(&key_misc.spacqlist); 7792 #endif 7793 7794 /* system default */ 7795 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7796 ip4_def_policy.state = IPSEC_SPSTATE_ALIVE; 7797 localcount_init(&ip4_def_policy.localcount); 7798 7799 #ifdef INET6 7800 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7801 ip6_def_policy.state = IPSEC_SPSTATE_ALIVE; 7802 localcount_init(&ip6_def_policy.localcount); 7803 #endif 7804 7805 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7806 7807 /* initialize key statistics */ 7808 keystat.getspi_count = 1; 7809 7810 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7811 7812 return (0); 7813 } 7814 7815 void 7816 key_init(void) 7817 { 7818 static ONCE_DECL(key_init_once); 7819 7820 sysctl_net_keyv2_setup(NULL); 7821 sysctl_net_key_compat_setup(NULL); 7822 7823 RUN_ONCE(&key_init_once, key_do_init); 7824 7825 key_init_so(); 7826 } 7827 7828 /* 7829 * XXX: maybe This function is called after INBOUND IPsec processing. 7830 * 7831 * Special check for tunnel-mode packets. 7832 * We must make some checks for consistency between inner and outer IP header. 7833 * 7834 * xxx more checks to be provided 7835 */ 7836 int 7837 key_checktunnelsanity( 7838 struct secasvar *sav, 7839 u_int family, 7840 void *src, 7841 void *dst 7842 ) 7843 { 7844 7845 /* XXX: check inner IP header */ 7846 7847 return 1; 7848 } 7849 7850 #if 0 7851 #define hostnamelen strlen(hostname) 7852 7853 /* 7854 * Get FQDN for the host. 7855 * If the administrator configured hostname (by hostname(1)) without 7856 * domain name, returns nothing. 7857 */ 7858 static const char * 7859 key_getfqdn(void) 7860 { 7861 int i; 7862 int hasdot; 7863 static char fqdn[MAXHOSTNAMELEN + 1]; 7864 7865 if (!hostnamelen) 7866 return NULL; 7867 7868 /* check if it comes with domain name. */ 7869 hasdot = 0; 7870 for (i = 0; i < hostnamelen; i++) { 7871 if (hostname[i] == '.') 7872 hasdot++; 7873 } 7874 if (!hasdot) 7875 return NULL; 7876 7877 /* NOTE: hostname may not be NUL-terminated. */ 7878 memset(fqdn, 0, sizeof(fqdn)); 7879 memcpy(fqdn, hostname, hostnamelen); 7880 fqdn[hostnamelen] = '\0'; 7881 return fqdn; 7882 } 7883 7884 /* 7885 * get username@FQDN for the host/user. 7886 */ 7887 static const char * 7888 key_getuserfqdn(void) 7889 { 7890 const char *host; 7891 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7892 struct proc *p = curproc; 7893 char *q; 7894 7895 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7896 return NULL; 7897 if (!(host = key_getfqdn())) 7898 return NULL; 7899 7900 /* NOTE: s_login may not be-NUL terminated. */ 7901 memset(userfqdn, 0, sizeof(userfqdn)); 7902 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7903 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7904 q = userfqdn + strlen(userfqdn); 7905 *q++ = '@'; 7906 memcpy(q, host, strlen(host)); 7907 q += strlen(host); 7908 *q++ = '\0'; 7909 7910 return userfqdn; 7911 } 7912 #endif 7913 7914 /* record data transfer on SA, and update timestamps */ 7915 void 7916 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7917 { 7918 7919 KASSERT(sav != NULL); 7920 KASSERT(sav->lft_c != NULL); 7921 KASSERT(m != NULL); 7922 7923 /* 7924 * XXX Currently, there is a difference of bytes size 7925 * between inbound and outbound processing. 7926 */ 7927 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7928 /* to check bytes lifetime is done in key_timehandler(). */ 7929 7930 /* 7931 * We use the number of packets as the unit of 7932 * sadb_lifetime_allocations. We increment the variable 7933 * whenever {esp,ah}_{in,out}put is called. 7934 */ 7935 sav->lft_c->sadb_lifetime_allocations++; 7936 /* XXX check for expires? */ 7937 7938 /* 7939 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7940 * in seconds. HARD and SOFT lifetime are measured by the time 7941 * difference (again in seconds) from sadb_lifetime_usetime. 7942 * 7943 * usetime 7944 * v expire expire 7945 * -----+-----+--------+---> t 7946 * <--------------> HARD 7947 * <-----> SOFT 7948 */ 7949 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7950 /* XXX check for expires? */ 7951 7952 return; 7953 } 7954 7955 /* dumb version */ 7956 void 7957 key_sa_routechange(struct sockaddr *dst) 7958 { 7959 struct secashead *sah; 7960 struct route *ro; 7961 const struct sockaddr *sa; 7962 7963 SAHLIST_READER_FOREACH(sah) { 7964 ro = &sah->sa_route; 7965 sa = rtcache_getdst(ro); 7966 if (sa != NULL && dst->sa_len == sa->sa_len && 7967 memcmp(dst, sa, dst->sa_len) == 0) 7968 rtcache_free(ro); 7969 } 7970 7971 return; 7972 } 7973 7974 static void 7975 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 7976 { 7977 struct secasvar *_sav; 7978 7979 KASSERT(sav != NULL); 7980 7981 if (sav->state == state) 7982 return; 7983 7984 SAVLIST_WRITER_REMOVE(sav); 7985 SAVLIST_ENTRY_DESTROY(sav); 7986 SAVLIST_ENTRY_INIT(sav); 7987 7988 sav->state = state; 7989 if (!SADB_SASTATE_USABLE_P(sav)) { 7990 /* We don't need to care about the order */ 7991 SAVLIST_WRITER_INSERT_HEAD(sav->sah, state, sav); 7992 return; 7993 } 7994 /* 7995 * Sort the list by lft_c->sadb_lifetime_addtime 7996 * in ascending order. 7997 */ 7998 SAVLIST_READER_FOREACH(_sav, sav->sah, state) { 7999 if (_sav->lft_c->sadb_lifetime_addtime > 8000 sav->lft_c->sadb_lifetime_addtime) { 8001 SAVLIST_WRITER_INSERT_BEFORE(_sav, sav); 8002 break; 8003 } 8004 } 8005 if (_sav == NULL) { 8006 SAVLIST_WRITER_INSERT_TAIL(sav->sah, state, sav); 8007 } 8008 key_validate_savlist(sav->sah, state); 8009 } 8010 8011 /* XXX too much? */ 8012 static struct mbuf * 8013 key_alloc_mbuf(int l) 8014 { 8015 struct mbuf *m = NULL, *n; 8016 int len, t; 8017 8018 len = l; 8019 while (len > 0) { 8020 MGET(n, M_DONTWAIT, MT_DATA); 8021 if (n && len > MLEN) 8022 MCLGET(n, M_DONTWAIT); 8023 if (!n) { 8024 m_freem(m); 8025 return NULL; 8026 } 8027 8028 n->m_next = NULL; 8029 n->m_len = 0; 8030 n->m_len = M_TRAILINGSPACE(n); 8031 /* use the bottom of mbuf, hoping we can prepend afterwards */ 8032 if (n->m_len > len) { 8033 t = (n->m_len - len) & ~(sizeof(long) - 1); 8034 n->m_data += t; 8035 n->m_len = len; 8036 } 8037 8038 len -= n->m_len; 8039 8040 if (m) 8041 m_cat(m, n); 8042 else 8043 m = n; 8044 } 8045 8046 return m; 8047 } 8048 8049 static struct mbuf * 8050 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 8051 { 8052 struct secashead *sah; 8053 struct secasvar *sav; 8054 u_int16_t proto; 8055 u_int8_t satype; 8056 u_int8_t state; 8057 int cnt; 8058 struct mbuf *m, *n; 8059 8060 KASSERT(mutex_owned(&key_sad.lock)); 8061 8062 /* map satype to proto */ 8063 proto = key_satype2proto(req_satype); 8064 if (proto == 0) { 8065 *errorp = EINVAL; 8066 return (NULL); 8067 } 8068 8069 /* count sav entries to be sent to the userland. */ 8070 cnt = 0; 8071 SAHLIST_WRITER_FOREACH(sah) { 8072 if (req_satype != SADB_SATYPE_UNSPEC && 8073 proto != sah->saidx.proto) 8074 continue; 8075 8076 SASTATE_ANY_FOREACH(state) { 8077 SAVLIST_WRITER_FOREACH(sav, sah, state) { 8078 cnt++; 8079 } 8080 } 8081 } 8082 8083 if (cnt == 0) { 8084 *errorp = ENOENT; 8085 return (NULL); 8086 } 8087 8088 /* send this to the userland, one at a time. */ 8089 m = NULL; 8090 SAHLIST_WRITER_FOREACH(sah) { 8091 if (req_satype != SADB_SATYPE_UNSPEC && 8092 proto != sah->saidx.proto) 8093 continue; 8094 8095 /* map proto to satype */ 8096 satype = key_proto2satype(sah->saidx.proto); 8097 if (satype == 0) { 8098 m_freem(m); 8099 *errorp = EINVAL; 8100 return (NULL); 8101 } 8102 8103 SASTATE_ANY_FOREACH(state) { 8104 SAVLIST_WRITER_FOREACH(sav, sah, state) { 8105 n = key_setdumpsa(sav, SADB_DUMP, satype, 8106 --cnt, pid); 8107 if (!n) { 8108 m_freem(m); 8109 *errorp = ENOBUFS; 8110 return (NULL); 8111 } 8112 8113 if (!m) 8114 m = n; 8115 else 8116 m_cat(m, n); 8117 } 8118 } 8119 } 8120 8121 if (!m) { 8122 *errorp = EINVAL; 8123 return (NULL); 8124 } 8125 8126 if ((m->m_flags & M_PKTHDR) != 0) { 8127 m->m_pkthdr.len = 0; 8128 for (n = m; n; n = n->m_next) 8129 m->m_pkthdr.len += n->m_len; 8130 } 8131 8132 *errorp = 0; 8133 return (m); 8134 } 8135 8136 static struct mbuf * 8137 key_setspddump(int *errorp, pid_t pid) 8138 { 8139 struct secpolicy *sp; 8140 int cnt; 8141 u_int dir; 8142 struct mbuf *m, *n; 8143 8144 KASSERT(mutex_owned(&key_spd.lock)); 8145 8146 /* search SPD entry and get buffer size. */ 8147 cnt = 0; 8148 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8149 SPLIST_WRITER_FOREACH(sp, dir) { 8150 cnt++; 8151 } 8152 } 8153 8154 if (cnt == 0) { 8155 *errorp = ENOENT; 8156 return (NULL); 8157 } 8158 8159 m = NULL; 8160 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8161 SPLIST_WRITER_FOREACH(sp, dir) { 8162 --cnt; 8163 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8164 8165 if (!n) { 8166 *errorp = ENOBUFS; 8167 m_freem(m); 8168 return (NULL); 8169 } 8170 if (!m) 8171 m = n; 8172 else { 8173 m->m_pkthdr.len += n->m_pkthdr.len; 8174 m_cat(m, n); 8175 } 8176 } 8177 } 8178 8179 *errorp = 0; 8180 return (m); 8181 } 8182 8183 int 8184 key_get_used(void) { 8185 return !SPLIST_READER_EMPTY(IPSEC_DIR_INBOUND) || 8186 !SPLIST_READER_EMPTY(IPSEC_DIR_OUTBOUND) || 8187 !SOCKSPLIST_READER_EMPTY(); 8188 } 8189 8190 void 8191 key_update_used(void) 8192 { 8193 switch (ipsec_enabled) { 8194 default: 8195 case 0: 8196 #ifdef notyet 8197 /* XXX: racy */ 8198 ipsec_used = 0; 8199 #endif 8200 break; 8201 case 1: 8202 #ifndef notyet 8203 /* XXX: racy */ 8204 if (!ipsec_used) 8205 #endif 8206 ipsec_used = key_get_used(); 8207 break; 8208 case 2: 8209 ipsec_used = 1; 8210 break; 8211 } 8212 } 8213 8214 static int 8215 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8216 { 8217 struct mbuf *m, *n; 8218 int err2 = 0; 8219 char *p, *ep; 8220 size_t len; 8221 int error; 8222 8223 if (newp) 8224 return (EPERM); 8225 if (namelen != 1) 8226 return (EINVAL); 8227 8228 mutex_enter(&key_sad.lock); 8229 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8230 mutex_exit(&key_sad.lock); 8231 if (!m) 8232 return (error); 8233 if (!oldp) 8234 *oldlenp = m->m_pkthdr.len; 8235 else { 8236 p = oldp; 8237 if (*oldlenp < m->m_pkthdr.len) { 8238 err2 = ENOMEM; 8239 ep = p + *oldlenp; 8240 } else { 8241 *oldlenp = m->m_pkthdr.len; 8242 ep = p + m->m_pkthdr.len; 8243 } 8244 for (n = m; n; n = n->m_next) { 8245 len = (ep - p < n->m_len) ? 8246 ep - p : n->m_len; 8247 error = copyout(mtod(n, const void *), p, len); 8248 p += len; 8249 if (error) 8250 break; 8251 } 8252 if (error == 0) 8253 error = err2; 8254 } 8255 m_freem(m); 8256 8257 return (error); 8258 } 8259 8260 static int 8261 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8262 { 8263 struct mbuf *m, *n; 8264 int err2 = 0; 8265 char *p, *ep; 8266 size_t len; 8267 int error; 8268 8269 if (newp) 8270 return (EPERM); 8271 if (namelen != 0) 8272 return (EINVAL); 8273 8274 mutex_enter(&key_spd.lock); 8275 m = key_setspddump(&error, l->l_proc->p_pid); 8276 mutex_exit(&key_spd.lock); 8277 if (!m) 8278 return (error); 8279 if (!oldp) 8280 *oldlenp = m->m_pkthdr.len; 8281 else { 8282 p = oldp; 8283 if (*oldlenp < m->m_pkthdr.len) { 8284 err2 = ENOMEM; 8285 ep = p + *oldlenp; 8286 } else { 8287 *oldlenp = m->m_pkthdr.len; 8288 ep = p + m->m_pkthdr.len; 8289 } 8290 for (n = m; n; n = n->m_next) { 8291 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8292 error = copyout(mtod(n, const void *), p, len); 8293 p += len; 8294 if (error) 8295 break; 8296 } 8297 if (error == 0) 8298 error = err2; 8299 } 8300 m_freem(m); 8301 8302 return (error); 8303 } 8304 8305 /* 8306 * Create sysctl tree for native IPSEC key knobs, originally 8307 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8308 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8309 * and in any case the part of our sysctl namespace used for dumping the 8310 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8311 * namespace, for API reasons. 8312 * 8313 * Pending a consensus on the right way to fix this, add a level of 8314 * indirection in how we number the `native' IPSEC key nodes; 8315 * and (as requested by Andrew Brown) move registration of the 8316 * KAME-compatible names to a separate function. 8317 */ 8318 #if 0 8319 # define IPSEC_PFKEY PF_KEY_V2 8320 # define IPSEC_PFKEY_NAME "keyv2" 8321 #else 8322 # define IPSEC_PFKEY PF_KEY 8323 # define IPSEC_PFKEY_NAME "key" 8324 #endif 8325 8326 static int 8327 sysctl_net_key_stats(SYSCTLFN_ARGS) 8328 { 8329 8330 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8331 } 8332 8333 static void 8334 sysctl_net_keyv2_setup(struct sysctllog **clog) 8335 { 8336 8337 sysctl_createv(clog, 0, NULL, NULL, 8338 CTLFLAG_PERMANENT, 8339 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8340 NULL, 0, NULL, 0, 8341 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8342 8343 sysctl_createv(clog, 0, NULL, NULL, 8344 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8345 CTLTYPE_INT, "debug", NULL, 8346 NULL, 0, &key_debug_level, 0, 8347 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8348 sysctl_createv(clog, 0, NULL, NULL, 8349 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8350 CTLTYPE_INT, "spi_try", NULL, 8351 NULL, 0, &key_spi_trycnt, 0, 8352 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8353 sysctl_createv(clog, 0, NULL, NULL, 8354 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8355 CTLTYPE_INT, "spi_min_value", NULL, 8356 NULL, 0, &key_spi_minval, 0, 8357 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8358 sysctl_createv(clog, 0, NULL, NULL, 8359 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8360 CTLTYPE_INT, "spi_max_value", NULL, 8361 NULL, 0, &key_spi_maxval, 0, 8362 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8363 sysctl_createv(clog, 0, NULL, NULL, 8364 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8365 CTLTYPE_INT, "random_int", NULL, 8366 NULL, 0, &key_int_random, 0, 8367 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8368 sysctl_createv(clog, 0, NULL, NULL, 8369 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8370 CTLTYPE_INT, "larval_lifetime", NULL, 8371 NULL, 0, &key_larval_lifetime, 0, 8372 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8373 sysctl_createv(clog, 0, NULL, NULL, 8374 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8375 CTLTYPE_INT, "blockacq_count", NULL, 8376 NULL, 0, &key_blockacq_count, 0, 8377 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8378 sysctl_createv(clog, 0, NULL, NULL, 8379 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8380 CTLTYPE_INT, "blockacq_lifetime", NULL, 8381 NULL, 0, &key_blockacq_lifetime, 0, 8382 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8383 sysctl_createv(clog, 0, NULL, NULL, 8384 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8385 CTLTYPE_INT, "esp_keymin", NULL, 8386 NULL, 0, &ipsec_esp_keymin, 0, 8387 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8388 sysctl_createv(clog, 0, NULL, NULL, 8389 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8390 CTLTYPE_INT, "prefered_oldsa", NULL, 8391 NULL, 0, &key_prefered_oldsa, 0, 8392 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8393 sysctl_createv(clog, 0, NULL, NULL, 8394 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8395 CTLTYPE_INT, "esp_auth", NULL, 8396 NULL, 0, &ipsec_esp_auth, 0, 8397 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8398 sysctl_createv(clog, 0, NULL, NULL, 8399 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8400 CTLTYPE_INT, "ah_keymin", NULL, 8401 NULL, 0, &ipsec_ah_keymin, 0, 8402 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8403 sysctl_createv(clog, 0, NULL, NULL, 8404 CTLFLAG_PERMANENT, 8405 CTLTYPE_STRUCT, "stats", 8406 SYSCTL_DESCR("PF_KEY statistics"), 8407 sysctl_net_key_stats, 0, NULL, 0, 8408 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8409 } 8410 8411 /* 8412 * Register sysctl names used by setkey(8). For historical reasons, 8413 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8414 * for both IPSEC and KAME IPSEC. 8415 */ 8416 static void 8417 sysctl_net_key_compat_setup(struct sysctllog **clog) 8418 { 8419 8420 sysctl_createv(clog, 0, NULL, NULL, 8421 CTLFLAG_PERMANENT, 8422 CTLTYPE_NODE, "key", NULL, 8423 NULL, 0, NULL, 0, 8424 CTL_NET, PF_KEY, CTL_EOL); 8425 8426 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8427 sysctl_createv(clog, 0, NULL, NULL, 8428 CTLFLAG_PERMANENT, 8429 CTLTYPE_STRUCT, "dumpsa", NULL, 8430 sysctl_net_key_dumpsa, 0, NULL, 0, 8431 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8432 sysctl_createv(clog, 0, NULL, NULL, 8433 CTLFLAG_PERMANENT, 8434 CTLTYPE_STRUCT, "dumpsp", NULL, 8435 sysctl_net_key_dumpsp, 0, NULL, 0, 8436 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8437 } 8438
Indexes created Tue Sep 23 07:09:52 GMT 2025