key.c revision 1.212
1 /* $NetBSD: key.c,v 1.212 2017/08/07 07:45:45 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 1.212 2017/08/07 07:45:45 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 u_int32_t key_debug_level = 0; 139 static u_int key_spi_trycnt = 1000; 140 static u_int32_t key_spi_minval = 0x100; 141 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */ 142 static u_int32_t policy_id = 0; 143 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/ 144 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/ 145 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/ 146 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/ 147 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/ 148 149 static u_int32_t acq_seq = 0; 150 151 /* 152 * Locking order: there is no order for now; it means that any locks aren't 153 * overlapped. 154 */ 155 /* 156 * Locking notes on SPD: 157 * - Modifications to the key_spd.splist must be done with holding key_spd.lock 158 * which is a adaptive mutex 159 * - Read accesses to the key_spd.splist must be in critical sections of 160 * pserialize(9) 161 * - SP's lifetime is managed by localcount(9) 162 * - An SP that has been inserted to the key_spd.splist is initially referenced 163 * by none, i.e., a reference from the key_spd.splist isn't counted 164 * - When an SP is being destroyed, we change its state as DEAD, wait for 165 * references to the SP to be released, and then deallocate the SP 166 * (see key_unlink_sp) 167 * - Getting an SP 168 * - Normally we get an SP from the key_spd.splist (see key_lookup_sp_byspidx) 169 * - Must iterate the list and increment the reference count of a found SP 170 * (by key_sp_ref) in a pserialize critical section 171 * - We can gain another reference from a held SP only if we check its state 172 * and take its reference in a critical section of pserialize 173 * (see esp_output for example) 174 * - We may get an SP from an SP cache. See below 175 * - A gotten SP must be released after use by KEY_SP_UNREF (key_sp_unref) 176 * - Updating member variables of an SP 177 * - Most member variables of an SP are immutable 178 * - Only sp->state and sp->lastused can be changed 179 * - sp->state of an SP is updated only when destroying it under key_spd.lock 180 * - SP caches 181 * - SPs can be cached in PCBs 182 * - The lifetime of the caches is controlled by the global generation counter 183 * (ipsec_spdgen) 184 * - The global counter value is stored when an SP is cached 185 * - If the stored value is different from the global counter then the cache 186 * is considered invalidated 187 * - The counter is incremented when an SP is being destroyed 188 * - So checking the generation and taking a reference to an SP should be 189 * in a critical section of pserialize 190 * - Note that caching doesn't increment the reference counter of an SP 191 * - SPs in sockets 192 * - Userland programs can set a policy to a socket by 193 * setsockopt(IP_IPSEC_POLICY) 194 * - Such policies (SPs) are set to a socket (PCB) and also inserted to 195 * the key_spd.socksplist list (not the key_spd.splist) 196 * - Such a policy is destroyed when a corresponding socket is destroed, 197 * however, a socket can be destroyed in softint so we cannot destroy 198 * it directly instead we just mark it DEAD and delay the destruction 199 * until GC by the timer 200 */ 201 /* 202 * Locking notes on misc data: 203 * - All lists of key_misc are protected by key_misc.lock 204 * - key_misc.lock must be held even for read accesses 205 */ 206 207 static pserialize_t key_psz; 208 209 /* SPD */ 210 static struct { 211 kmutex_t lock; 212 kcondvar_t cv; 213 struct pslist_head splist[IPSEC_DIR_MAX]; 214 /* 215 * The list has SPs that are set to a socket via 216 * setsockopt(IP_IPSEC_POLICY) from userland. See ipsec_set_policy. 217 */ 218 struct pslist_head socksplist; 219 } key_spd __cacheline_aligned; 220 221 /* SAD */ 222 static struct { 223 kmutex_t lock; 224 struct pslist_head sahlist; 225 } key_sad __cacheline_aligned; 226 227 /* Misc data */ 228 static struct { 229 kmutex_t lock; 230 /* registed list */ 231 LIST_HEAD(_reglist, secreg) reglist[SADB_SATYPE_MAX + 1]; 232 #ifndef IPSEC_NONBLOCK_ACQUIRE 233 /* acquiring list */ 234 LIST_HEAD(_acqlist, secacq) acqlist; 235 #endif 236 #ifdef notyet 237 /* SP acquiring list */ 238 LIST_HEAD(_spacqlist, secspacq) spacqlist; 239 #endif 240 } key_misc __cacheline_aligned; 241 242 /* Macros for key_spd.splist */ 243 #define SPLIST_ENTRY_INIT(sp) \ 244 PSLIST_ENTRY_INIT((sp), pslist_entry) 245 #define SPLIST_ENTRY_DESTROY(sp) \ 246 PSLIST_ENTRY_DESTROY((sp), pslist_entry) 247 #define SPLIST_WRITER_REMOVE(sp) \ 248 PSLIST_WRITER_REMOVE((sp), pslist_entry) 249 #define SPLIST_READER_EMPTY(dir) \ 250 (PSLIST_READER_FIRST(&key_spd.splist[(dir)], struct secpolicy, \ 251 pslist_entry) == NULL) 252 #define SPLIST_READER_FOREACH(sp, dir) \ 253 PSLIST_READER_FOREACH((sp), &key_spd.splist[(dir)], \ 254 struct secpolicy, pslist_entry) 255 #define SPLIST_WRITER_FOREACH(sp, dir) \ 256 PSLIST_WRITER_FOREACH((sp), &key_spd.splist[(dir)], \ 257 struct secpolicy, pslist_entry) 258 #define SPLIST_WRITER_INSERT_AFTER(sp, new) \ 259 PSLIST_WRITER_INSERT_AFTER((sp), (new), pslist_entry) 260 #define SPLIST_WRITER_EMPTY(dir) \ 261 (PSLIST_WRITER_FIRST(&key_spd.splist[(dir)], struct secpolicy, \ 262 pslist_entry) == NULL) 263 #define SPLIST_WRITER_INSERT_HEAD(dir, sp) \ 264 PSLIST_WRITER_INSERT_HEAD(&key_spd.splist[(dir)], (sp), \ 265 pslist_entry) 266 #define SPLIST_WRITER_NEXT(sp) \ 267 PSLIST_WRITER_NEXT((sp), struct secpolicy, pslist_entry) 268 #define SPLIST_WRITER_INSERT_TAIL(dir, new) \ 269 do { \ 270 if (SPLIST_WRITER_EMPTY((dir))) { \ 271 SPLIST_WRITER_INSERT_HEAD((dir), (new)); \ 272 } else { \ 273 struct secpolicy *__sp; \ 274 SPLIST_WRITER_FOREACH(__sp, (dir)) { \ 275 if (SPLIST_WRITER_NEXT(__sp) == NULL) { \ 276 SPLIST_WRITER_INSERT_AFTER(__sp,\ 277 (new)); \ 278 break; \ 279 } \ 280 } \ 281 } \ 282 } while (0) 283 284 /* Macros for key_spd.socksplist */ 285 #define SOCKSPLIST_WRITER_FOREACH(sp) \ 286 PSLIST_WRITER_FOREACH((sp), &key_spd.socksplist, \ 287 struct secpolicy, pslist_entry) 288 #define SOCKSPLIST_READER_EMPTY() \ 289 (PSLIST_READER_FIRST(&key_spd.socksplist, struct secpolicy, \ 290 pslist_entry) == NULL) 291 292 /* Macros for key_sad.sahlist */ 293 #define SAHLIST_ENTRY_INIT(sah) \ 294 PSLIST_ENTRY_INIT((sah), pslist_entry) 295 #define SAHLIST_ENTRY_DESTROY(sah) \ 296 PSLIST_ENTRY_DESTROY((sah), pslist_entry) 297 #define SAHLIST_WRITER_REMOVE(sah) \ 298 PSLIST_WRITER_REMOVE((sah), pslist_entry) 299 #define SAHLIST_READER_FOREACH(sah) \ 300 PSLIST_READER_FOREACH((sah), &key_sad.sahlist, struct secashead,\ 301 pslist_entry) 302 #define SAHLIST_WRITER_FOREACH(sah) \ 303 PSLIST_WRITER_FOREACH((sah), &key_sad.sahlist, struct secashead,\ 304 pslist_entry) 305 #define SAHLIST_WRITER_INSERT_HEAD(sah) \ 306 PSLIST_WRITER_INSERT_HEAD(&key_sad.sahlist, (sah), pslist_entry) 307 308 /* Macros for key_sad.sahlist#savlist */ 309 #define SAVLIST_ENTRY_INIT(sav) \ 310 PSLIST_ENTRY_INIT((sav), pslist_entry) 311 #define SAVLIST_ENTRY_DESTROY(sav) \ 312 PSLIST_ENTRY_DESTROY((sav), pslist_entry) 313 #define SAVLIST_READER_FIRST(sah, state) \ 314 PSLIST_READER_FIRST(&(sah)->savlist[(state)], struct secasvar, \ 315 pslist_entry) 316 #define SAVLIST_WRITER_REMOVE(sav) \ 317 PSLIST_WRITER_REMOVE((sav), pslist_entry) 318 #define SAVLIST_READER_FOREACH(sav, sah, state) \ 319 PSLIST_READER_FOREACH((sav), &(sah)->savlist[(state)], \ 320 struct secasvar, pslist_entry) 321 #define SAVLIST_WRITER_FOREACH(sav, sah, state) \ 322 PSLIST_WRITER_FOREACH((sav), &(sah)->savlist[(state)], \ 323 struct secasvar, pslist_entry) 324 #define SAVLIST_WRITER_INSERT_BEFORE(sav, new) \ 325 PSLIST_WRITER_INSERT_BEFORE((sav), (new), pslist_entry) 326 #define SAVLIST_WRITER_INSERT_AFTER(sav, new) \ 327 PSLIST_WRITER_INSERT_AFTER((sav), (new), pslist_entry) 328 #define SAVLIST_WRITER_EMPTY(sah, state) \ 329 (PSLIST_WRITER_FIRST(&(sah)->savlist[(state)], struct secasvar, \ 330 pslist_entry) == NULL) 331 #define SAVLIST_WRITER_INSERT_HEAD(sah, state, sav) \ 332 PSLIST_WRITER_INSERT_HEAD(&(sah)->savlist[(state)], (sav), \ 333 pslist_entry) 334 #define SAVLIST_WRITER_NEXT(sav) \ 335 PSLIST_WRITER_NEXT((sav), struct secasvar, pslist_entry) 336 #define SAVLIST_WRITER_INSERT_TAIL(sah, state, new) \ 337 do { \ 338 if (SAVLIST_WRITER_EMPTY((sah), (state))) { \ 339 SAVLIST_WRITER_INSERT_HEAD((sah), (state), (new));\ 340 } else { \ 341 struct secasvar *__sav; \ 342 SAVLIST_WRITER_FOREACH(__sav, (sah), (state)) { \ 343 if (SAVLIST_WRITER_NEXT(__sav) == NULL) {\ 344 SAVLIST_WRITER_INSERT_AFTER(__sav,\ 345 (new)); \ 346 break; \ 347 } \ 348 } \ 349 } \ 350 } while (0) 351 #define SAVLIST_READER_NEXT(sav) \ 352 PSLIST_READER_NEXT((sav), struct secasvar, pslist_entry) 353 354 355 /* search order for SAs */ 356 /* 357 * This order is important because we must select the oldest SA 358 * for outbound processing. For inbound, This is not important. 359 */ 360 static const u_int saorder_state_valid_prefer_old[] = { 361 SADB_SASTATE_DYING, SADB_SASTATE_MATURE, 362 }; 363 static const u_int saorder_state_valid_prefer_new[] = { 364 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 365 }; 366 367 static const u_int saorder_state_alive[] = { 368 /* except DEAD */ 369 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL 370 }; 371 static const u_int saorder_state_any[] = { 372 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, 373 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD 374 }; 375 376 #define SASTATE_ALIVE_FOREACH(s) \ 377 for (int _i = 0; \ 378 _i < __arraycount(saorder_state_alive) ? \ 379 (s) = saorder_state_alive[_i], true : false; \ 380 _i++) 381 #define SASTATE_ANY_FOREACH(s) \ 382 for (int _i = 0; \ 383 _i < __arraycount(saorder_state_any) ? \ 384 (s) = saorder_state_any[_i], true : false; \ 385 _i++) 386 387 static const int minsize[] = { 388 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 389 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 390 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 391 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 392 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 393 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */ 394 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */ 395 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */ 396 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */ 397 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */ 398 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */ 399 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */ 400 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */ 401 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */ 402 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */ 403 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */ 404 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 405 0, /* SADB_X_EXT_KMPRIVATE */ 406 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */ 407 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 408 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 409 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 410 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 411 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */ 412 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */ 413 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 414 }; 415 static const int maxsize[] = { 416 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */ 417 sizeof(struct sadb_sa), /* SADB_EXT_SA */ 418 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */ 419 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */ 420 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */ 421 0, /* SADB_EXT_ADDRESS_SRC */ 422 0, /* SADB_EXT_ADDRESS_DST */ 423 0, /* SADB_EXT_ADDRESS_PROXY */ 424 0, /* SADB_EXT_KEY_AUTH */ 425 0, /* SADB_EXT_KEY_ENCRYPT */ 426 0, /* SADB_EXT_IDENTITY_SRC */ 427 0, /* SADB_EXT_IDENTITY_DST */ 428 0, /* SADB_EXT_SENSITIVITY */ 429 0, /* SADB_EXT_PROPOSAL */ 430 0, /* SADB_EXT_SUPPORTED_AUTH */ 431 0, /* SADB_EXT_SUPPORTED_ENCRYPT */ 432 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */ 433 0, /* SADB_X_EXT_KMPRIVATE */ 434 0, /* SADB_X_EXT_POLICY */ 435 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */ 436 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */ 437 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */ 438 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */ 439 0, /* SADB_X_EXT_NAT_T_OAI */ 440 0, /* SADB_X_EXT_NAT_T_OAR */ 441 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */ 442 }; 443 444 static int ipsec_esp_keymin = 256; 445 static int ipsec_esp_auth = 0; 446 static int ipsec_ah_keymin = 128; 447 448 #ifdef SYSCTL_DECL 449 SYSCTL_DECL(_net_key); 450 #endif 451 452 #ifdef SYSCTL_INT 453 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \ 454 &key_debug_level, 0, ""); 455 456 /* max count of trial for the decision of spi value */ 457 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \ 458 &key_spi_trycnt, 0, ""); 459 460 /* minimum spi value to allocate automatically. */ 461 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \ 462 &key_spi_minval, 0, ""); 463 464 /* maximun spi value to allocate automatically. */ 465 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \ 466 &key_spi_maxval, 0, ""); 467 468 /* interval to initialize randseed */ 469 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \ 470 &key_int_random, 0, ""); 471 472 /* lifetime for larval SA */ 473 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \ 474 &key_larval_lifetime, 0, ""); 475 476 /* counter for blocking to send SADB_ACQUIRE to IKEd */ 477 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \ 478 &key_blockacq_count, 0, ""); 479 480 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */ 481 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \ 482 &key_blockacq_lifetime, 0, ""); 483 484 /* ESP auth */ 485 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \ 486 &ipsec_esp_auth, 0, ""); 487 488 /* minimum ESP key length */ 489 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \ 490 &ipsec_esp_keymin, 0, ""); 491 492 /* minimum AH key length */ 493 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \ 494 &ipsec_ah_keymin, 0, ""); 495 496 /* perfered old SA rather than new SA */ 497 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\ 498 &key_prefered_oldsa, 0, ""); 499 #endif /* SYSCTL_INT */ 500 501 #define __LIST_CHAINED(elm) \ 502 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL)) 503 #define LIST_INSERT_TAIL(head, elm, type, field) \ 504 do {\ 505 struct type *curelm = LIST_FIRST(head); \ 506 if (curelm == NULL) {\ 507 LIST_INSERT_HEAD(head, elm, field); \ 508 } else { \ 509 while (LIST_NEXT(curelm, field)) \ 510 curelm = LIST_NEXT(curelm, field);\ 511 LIST_INSERT_AFTER(curelm, elm, field);\ 512 }\ 513 } while (0) 514 515 #define KEY_CHKSASTATE(head, sav) \ 516 /* do */ { \ 517 if ((head) != (sav)) { \ 518 IPSECLOG(LOG_DEBUG, \ 519 "state mismatched (TREE=%d SA=%d)\n", \ 520 (head), (sav)); \ 521 continue; \ 522 } \ 523 } /* while (0) */ 524 525 #define KEY_CHKSPDIR(head, sp) \ 526 do { \ 527 if ((head) != (sp)) { \ 528 IPSECLOG(LOG_DEBUG, \ 529 "direction mismatched (TREE=%d SP=%d), anyway continue.\n",\ 530 (head), (sp)); \ 531 } \ 532 } while (0) 533 534 /* 535 * set parameters into secasindex buffer. 536 * Must allocate secasindex buffer before calling this function. 537 */ 538 static int 539 key_setsecasidx(int, int, int, const struct sockaddr *, 540 const struct sockaddr *, struct secasindex *); 541 542 /* key statistics */ 543 struct _keystat { 544 u_long getspi_count; /* the avarage of count to try to get new SPI */ 545 } keystat; 546 547 struct sadb_msghdr { 548 struct sadb_msg *msg; 549 struct sadb_ext *ext[SADB_EXT_MAX + 1]; 550 int extoff[SADB_EXT_MAX + 1]; 551 int extlen[SADB_EXT_MAX + 1]; 552 }; 553 554 static void 555 key_init_spidx_bymsghdr(struct secpolicyindex *, const struct sadb_msghdr *); 556 557 static const struct sockaddr * 558 key_msghdr_get_sockaddr(const struct sadb_msghdr *mhp, int idx) 559 { 560 561 return PFKEY_ADDR_SADDR((struct sadb_address *)mhp->ext[idx]); 562 } 563 564 static struct mbuf * 565 key_fill_replymsg(struct mbuf *m, int seq) 566 { 567 struct sadb_msg *msg; 568 569 if (m->m_len < sizeof(*msg)) { 570 m = m_pullup(m, sizeof(*msg)); 571 if (m == NULL) 572 return NULL; 573 } 574 msg = mtod(m, struct sadb_msg *); 575 msg->sadb_msg_errno = 0; 576 msg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 577 if (seq != 0) 578 msg->sadb_msg_seq = seq; 579 580 return m; 581 } 582 583 static struct secasvar *key_lookup_sa_bysaidx(const struct secasindex *); 584 #if 0 585 static void key_freeso(struct socket *); 586 static void key_freesp_so(struct secpolicy **); 587 #endif 588 static struct secpolicy *key_getsp (const struct secpolicyindex *); 589 static struct secpolicy *key_getspbyid (u_int32_t); 590 static struct secpolicy *key_lookup_and_remove_sp(const struct secpolicyindex *); 591 static struct secpolicy *key_lookupbyid_and_remove_sp(u_int32_t); 592 static void key_destroy_sp(struct secpolicy *); 593 static u_int16_t key_newreqid (void); 594 static struct mbuf *key_gather_mbuf (struct mbuf *, 595 const struct sadb_msghdr *, int, int, ...); 596 static int key_api_spdadd(struct socket *, struct mbuf *, 597 const struct sadb_msghdr *); 598 static u_int32_t key_getnewspid (void); 599 static int key_api_spddelete(struct socket *, struct mbuf *, 600 const struct sadb_msghdr *); 601 static int key_api_spddelete2(struct socket *, struct mbuf *, 602 const struct sadb_msghdr *); 603 static int key_api_spdget(struct socket *, struct mbuf *, 604 const struct sadb_msghdr *); 605 static int key_api_spdflush(struct socket *, struct mbuf *, 606 const struct sadb_msghdr *); 607 static int key_api_spddump(struct socket *, struct mbuf *, 608 const struct sadb_msghdr *); 609 static struct mbuf * key_setspddump (int *errorp, pid_t); 610 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid); 611 static int key_api_nat_map(struct socket *, struct mbuf *, 612 const struct sadb_msghdr *); 613 static struct mbuf *key_setdumpsp (struct secpolicy *, 614 u_int8_t, u_int32_t, pid_t); 615 static u_int key_getspreqmsglen (const struct secpolicy *); 616 static int key_spdexpire (struct secpolicy *); 617 static struct secashead *key_newsah (const struct secasindex *); 618 static void key_delsah (struct secashead *); 619 static struct secasvar *key_newsav(struct mbuf *, 620 const struct sadb_msghdr *, int *, const char*, int); 621 #define KEY_NEWSAV(m, sadb, e) \ 622 key_newsav(m, sadb, e, __func__, __LINE__) 623 static void key_delsav (struct secasvar *); 624 static struct secashead *key_getsah(const struct secasindex *, int); 625 static bool key_checkspidup(const struct secasindex *, u_int32_t); 626 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t); 627 static int key_setsaval (struct secasvar *, struct mbuf *, 628 const struct sadb_msghdr *); 629 static void key_freesaval(struct secasvar *); 630 static int key_init_xform(struct secasvar *); 631 static void key_clear_xform(struct secasvar *); 632 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t, 633 u_int8_t, u_int32_t, u_int32_t); 634 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t); 635 static struct mbuf *key_setsadbxtype (u_int16_t); 636 static struct mbuf *key_setsadbxfrag (u_int16_t); 637 static void key_porttosaddr (union sockaddr_union *, u_int16_t); 638 static int key_checksalen (const union sockaddr_union *); 639 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t, 640 u_int32_t, pid_t, u_int16_t); 641 static struct mbuf *key_setsadbsa (struct secasvar *); 642 static struct mbuf *key_setsadbaddr (u_int16_t, 643 const struct sockaddr *, u_int8_t, u_int16_t); 644 #if 0 645 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *, 646 int, u_int64_t); 647 #endif 648 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t); 649 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t, 650 u_int32_t); 651 static void *key_newbuf (const void *, u_int); 652 #ifdef INET6 653 static int key_ismyaddr6 (const struct sockaddr_in6 *); 654 #endif 655 656 static void sysctl_net_keyv2_setup(struct sysctllog **); 657 static void sysctl_net_key_compat_setup(struct sysctllog **); 658 659 /* flags for key_saidx_match() */ 660 #define CMP_HEAD 1 /* protocol, addresses. */ 661 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */ 662 #define CMP_REQID 3 /* additionally HEAD, reaid. */ 663 #define CMP_EXACTLY 4 /* all elements. */ 664 static int key_saidx_match(const struct secasindex *, 665 const struct secasindex *, int); 666 667 static int key_sockaddr_match(const struct sockaddr *, 668 const struct sockaddr *, int); 669 static int key_bb_match_withmask(const void *, const void *, u_int); 670 static u_int16_t key_satype2proto (u_int8_t); 671 static u_int8_t key_proto2satype (u_int16_t); 672 673 static int key_spidx_match_exactly(const struct secpolicyindex *, 674 const struct secpolicyindex *); 675 static int key_spidx_match_withmask(const struct secpolicyindex *, 676 const struct secpolicyindex *); 677 678 static int key_api_getspi(struct socket *, struct mbuf *, 679 const struct sadb_msghdr *); 680 static u_int32_t key_do_getnewspi (const struct sadb_spirange *, 681 const struct secasindex *); 682 static int key_handle_natt_info (struct secasvar *, 683 const struct sadb_msghdr *); 684 static int key_set_natt_ports (union sockaddr_union *, 685 union sockaddr_union *, 686 const struct sadb_msghdr *); 687 static int key_api_update(struct socket *, struct mbuf *, 688 const struct sadb_msghdr *); 689 #ifdef IPSEC_DOSEQCHECK 690 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t); 691 #endif 692 static int key_api_add(struct socket *, struct mbuf *, 693 const struct sadb_msghdr *); 694 static int key_setident (struct secashead *, struct mbuf *, 695 const struct sadb_msghdr *); 696 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *, 697 const struct sadb_msghdr *); 698 static int key_api_delete(struct socket *, struct mbuf *, 699 const struct sadb_msghdr *); 700 static int key_api_get(struct socket *, struct mbuf *, 701 const struct sadb_msghdr *); 702 703 static void key_getcomb_setlifetime (struct sadb_comb *); 704 static struct mbuf *key_getcomb_esp (void); 705 static struct mbuf *key_getcomb_ah (void); 706 static struct mbuf *key_getcomb_ipcomp (void); 707 static struct mbuf *key_getprop (const struct secasindex *); 708 709 static int key_acquire (const struct secasindex *, struct secpolicy *); 710 #ifndef IPSEC_NONBLOCK_ACQUIRE 711 static struct secacq *key_newacq (const struct secasindex *); 712 static struct secacq *key_getacq (const struct secasindex *); 713 static struct secacq *key_getacqbyseq (u_int32_t); 714 #endif 715 #ifdef notyet 716 static struct secspacq *key_newspacq (const struct secpolicyindex *); 717 static struct secspacq *key_getspacq (const struct secpolicyindex *); 718 #endif 719 static int key_api_acquire(struct socket *, struct mbuf *, 720 const struct sadb_msghdr *); 721 static int key_api_register(struct socket *, struct mbuf *, 722 const struct sadb_msghdr *); 723 static int key_expire (struct secasvar *); 724 static int key_api_flush(struct socket *, struct mbuf *, 725 const struct sadb_msghdr *); 726 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp, 727 int *lenp, pid_t pid); 728 static int key_api_dump(struct socket *, struct mbuf *, 729 const struct sadb_msghdr *); 730 static int key_api_promisc(struct socket *, struct mbuf *, 731 const struct sadb_msghdr *); 732 static int key_senderror (struct socket *, struct mbuf *, int); 733 static int key_validate_ext (const struct sadb_ext *, int); 734 static int key_align (struct mbuf *, struct sadb_msghdr *); 735 #if 0 736 static const char *key_getfqdn (void); 737 static const char *key_getuserfqdn (void); 738 #endif 739 static void key_sa_chgstate (struct secasvar *, u_int8_t); 740 741 static struct mbuf *key_alloc_mbuf (int); 742 743 static void key_timehandler(void *); 744 static void key_timehandler_work(struct work *, void *); 745 static struct callout key_timehandler_ch; 746 static struct workqueue *key_timehandler_wq; 747 static struct work key_timehandler_wk; 748 749 #ifdef IPSEC_REF_DEBUG 750 #define REFLOG(label, p, where, tag) \ 751 log(LOG_DEBUG, "%s:%d: " label " : refcnt=%d (%p)\n.", \ 752 (where), (tag), (p)->refcnt, (p)) 753 #else 754 #define REFLOG(label, p, where, tag) do {} while (0) 755 #endif 756 757 #define SA_ADDREF(p) do { \ 758 atomic_inc_uint(&(p)->refcnt); \ 759 REFLOG("SA_ADDREF", (p), __func__, __LINE__); \ 760 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 761 } while (0) 762 #define SA_ADDREF2(p, where, tag) do { \ 763 atomic_inc_uint(&(p)->refcnt); \ 764 REFLOG("SA_ADDREF", (p), (where), (tag)); \ 765 KASSERTMSG((p)->refcnt != 0, "SA refcnt overflow"); \ 766 } while (0) 767 #define SA_DELREF(p) do { \ 768 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 769 atomic_dec_uint(&(p)->refcnt); \ 770 REFLOG("SA_DELREF", (p), __func__, __LINE__); \ 771 } while (0) 772 #define SA_DELREF2(p, nv, where, tag) do { \ 773 KASSERTMSG((p)->refcnt > 0, "SA refcnt underflow"); \ 774 nv = atomic_dec_uint_nv(&(p)->refcnt); \ 775 REFLOG("SA_DELREF", (p), (where), (tag)); \ 776 } while (0) 777 778 u_int 779 key_sp_refcnt(const struct secpolicy *sp) 780 { 781 782 /* FIXME */ 783 return 0; 784 } 785 786 /* 787 * Remove the sp from the key_spd.splist and wait for references to the sp 788 * to be released. key_spd.lock must be held. 789 */ 790 static void 791 key_unlink_sp(struct secpolicy *sp) 792 { 793 794 KASSERT(mutex_owned(&key_spd.lock)); 795 796 sp->state = IPSEC_SPSTATE_DEAD; 797 SPLIST_WRITER_REMOVE(sp); 798 799 /* Invalidate all cached SPD pointers in the PCBs. */ 800 ipsec_invalpcbcacheall(); 801 802 #ifdef NET_MPSAFE 803 KASSERT(mutex_ownable(softnet_lock)); 804 pserialize_perform(key_psz); 805 #endif 806 807 localcount_drain(&sp->localcount, &key_spd.cv, &key_spd.lock); 808 } 809 810 /* 811 * Return 0 when there are known to be no SP's for the specified 812 * direction. Otherwise return 1. This is used by IPsec code 813 * to optimize performance. 814 */ 815 int 816 key_havesp(u_int dir) 817 { 818 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ? 819 !SPLIST_READER_EMPTY(dir) : 1); 820 } 821 822 /* %%% IPsec policy management */ 823 /* 824 * allocating a SP for OUTBOUND or INBOUND packet. 825 * Must call key_freesp() later. 826 * OUT: NULL: not found 827 * others: found and return the pointer. 828 */ 829 struct secpolicy * 830 key_lookup_sp_byspidx(const struct secpolicyindex *spidx, 831 u_int dir, const char* where, int tag) 832 { 833 struct secpolicy *sp; 834 int s; 835 836 KASSERT(spidx != NULL); 837 KASSERTMSG(IPSEC_DIR_IS_INOROUT(dir), "invalid direction %u", dir); 838 839 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 840 841 /* get a SP entry */ 842 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 843 printf("*** objects\n"); 844 kdebug_secpolicyindex(spidx); 845 } 846 847 s = pserialize_read_enter(); 848 SPLIST_READER_FOREACH(sp, dir) { 849 if (KEYDEBUG_ON(KEYDEBUG_IPSEC_DATA)) { 850 printf("*** in SPD\n"); 851 kdebug_secpolicyindex(&sp->spidx); 852 } 853 854 if (sp->state == IPSEC_SPSTATE_DEAD) 855 continue; 856 if (key_spidx_match_withmask(&sp->spidx, spidx)) 857 goto found; 858 } 859 sp = NULL; 860 found: 861 if (sp) { 862 /* sanity check */ 863 KEY_CHKSPDIR(sp->spidx.dir, dir); 864 865 /* found a SPD entry */ 866 sp->lastused = time_uptime; 867 key_sp_ref(sp, where, tag); 868 } 869 pserialize_read_exit(s); 870 871 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 872 "DP return SP:%p (ID=%u) refcnt %u\n", 873 sp, sp ? sp->id : 0, key_sp_refcnt(sp)); 874 return sp; 875 } 876 877 /* 878 * return a policy that matches this particular inbound packet. 879 * XXX slow 880 */ 881 struct secpolicy * 882 key_gettunnel(const struct sockaddr *osrc, 883 const struct sockaddr *odst, 884 const struct sockaddr *isrc, 885 const struct sockaddr *idst, 886 const char* where, int tag) 887 { 888 struct secpolicy *sp; 889 const int dir = IPSEC_DIR_INBOUND; 890 int s; 891 struct ipsecrequest *r1, *r2, *p; 892 struct secpolicyindex spidx; 893 894 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, "DP from %s:%u\n", where, tag); 895 896 if (isrc->sa_family != idst->sa_family) { 897 IPSECLOG(LOG_ERR, "protocol family mismatched %d != %d\n.", 898 isrc->sa_family, idst->sa_family); 899 sp = NULL; 900 goto done; 901 } 902 903 s = pserialize_read_enter(); 904 SPLIST_READER_FOREACH(sp, dir) { 905 if (sp->state == IPSEC_SPSTATE_DEAD) 906 continue; 907 908 r1 = r2 = NULL; 909 for (p = sp->req; p; p = p->next) { 910 if (p->saidx.mode != IPSEC_MODE_TUNNEL) 911 continue; 912 913 r1 = r2; 914 r2 = p; 915 916 if (!r1) { 917 /* here we look at address matches only */ 918 spidx = sp->spidx; 919 if (isrc->sa_len > sizeof(spidx.src) || 920 idst->sa_len > sizeof(spidx.dst)) 921 continue; 922 memcpy(&spidx.src, isrc, isrc->sa_len); 923 memcpy(&spidx.dst, idst, idst->sa_len); 924 if (!key_spidx_match_withmask(&sp->spidx, &spidx)) 925 continue; 926 } else { 927 if (!key_sockaddr_match(&r1->saidx.src.sa, isrc, PORT_NONE) || 928 !key_sockaddr_match(&r1->saidx.dst.sa, idst, PORT_NONE)) 929 continue; 930 } 931 932 if (!key_sockaddr_match(&r2->saidx.src.sa, osrc, PORT_NONE) || 933 !key_sockaddr_match(&r2->saidx.dst.sa, odst, PORT_NONE)) 934 continue; 935 936 goto found; 937 } 938 } 939 sp = NULL; 940 found: 941 if (sp) { 942 sp->lastused = time_uptime; 943 key_sp_ref(sp, where, tag); 944 } 945 pserialize_read_exit(s); 946 done: 947 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 948 "DP return SP:%p (ID=%u) refcnt %u\n", 949 sp, sp ? sp->id : 0, key_sp_refcnt(sp)); 950 return sp; 951 } 952 953 /* 954 * allocating an SA entry for an *OUTBOUND* packet. 955 * checking each request entries in SP, and acquire an SA if need. 956 * OUT: 0: there are valid requests. 957 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring. 958 */ 959 int 960 key_checkrequest(struct ipsecrequest *isr, struct secasvar **ret) 961 { 962 u_int level; 963 int error; 964 const struct secasindex *saidx = &isr->saidx; 965 struct secasvar *sav; 966 967 KASSERT(isr != NULL); 968 KASSERTMSG(saidx->mode == IPSEC_MODE_TRANSPORT || 969 saidx->mode == IPSEC_MODE_TUNNEL, 970 "unexpected policy %u", saidx->mode); 971 972 /* get current level */ 973 level = ipsec_get_reqlevel(isr); 974 975 /* 976 * XXX guard against protocol callbacks from the crypto 977 * thread as they reference ipsecrequest.sav which we 978 * temporarily null out below. Need to rethink how we 979 * handle bundled SA's in the callback thread. 980 */ 981 IPSEC_SPLASSERT_SOFTNET("key_checkrequest"); 982 983 sav = key_lookup_sa_bysaidx(saidx); 984 if (sav != NULL) { 985 *ret = sav; 986 return 0; 987 } 988 989 /* there is no SA */ 990 error = key_acquire(saidx, isr->sp); 991 if (error != 0) { 992 /* XXX What should I do ? */ 993 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 994 error); 995 return error; 996 } 997 998 if (level != IPSEC_LEVEL_REQUIRE) { 999 /* XXX sigh, the interface to this routine is botched */ 1000 *ret = NULL; 1001 return 0; 1002 } else { 1003 return ENOENT; 1004 } 1005 } 1006 1007 /* 1008 * looking up a SA for policy entry from SAD. 1009 * NOTE: searching SAD of aliving state. 1010 * OUT: NULL: not found. 1011 * others: found and return the pointer. 1012 */ 1013 static struct secasvar * 1014 key_lookup_sa_bysaidx(const struct secasindex *saidx) 1015 { 1016 struct secashead *sah; 1017 struct secasvar *sav = NULL; 1018 u_int stateidx, state; 1019 const u_int *saorder_state_valid; 1020 int arraysize; 1021 int s; 1022 1023 s = pserialize_read_enter(); 1024 sah = key_getsah(saidx, CMP_MODE_REQID); 1025 if (sah == NULL) 1026 goto out; 1027 1028 /* 1029 * search a valid state list for outbound packet. 1030 * This search order is important. 1031 */ 1032 if (key_prefered_oldsa) { 1033 saorder_state_valid = saorder_state_valid_prefer_old; 1034 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1035 } else { 1036 saorder_state_valid = saorder_state_valid_prefer_new; 1037 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1038 } 1039 1040 /* search valid state */ 1041 for (stateidx = 0; 1042 stateidx < arraysize; 1043 stateidx++) { 1044 1045 state = saorder_state_valid[stateidx]; 1046 1047 if (key_prefered_oldsa) 1048 sav = SAVLIST_READER_FIRST(sah, state); 1049 else { 1050 /* XXX need O(1) lookup */ 1051 struct secasvar *last = NULL; 1052 1053 SAVLIST_READER_FOREACH(sav, sah, state) 1054 last = sav; 1055 sav = last; 1056 } 1057 if (sav != NULL) { 1058 SA_ADDREF(sav); 1059 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1060 "DP cause refcnt++:%d SA:%p\n", 1061 sav->refcnt, sav); 1062 break; 1063 } 1064 } 1065 out: 1066 pserialize_read_exit(s); 1067 1068 return sav; 1069 } 1070 1071 #if 0 1072 static void 1073 key_sendup_message_delete(struct secasvar *sav) 1074 { 1075 struct mbuf *m, *result = 0; 1076 uint8_t satype; 1077 1078 satype = key_proto2satype(sav->sah->saidx.proto); 1079 if (satype == 0) 1080 goto msgfail; 1081 1082 m = key_setsadbmsg(SADB_DELETE, 0, satype, 0, 0, sav->refcnt - 1); 1083 if (m == NULL) 1084 goto msgfail; 1085 result = m; 1086 1087 /* set sadb_address for saidx's. */ 1088 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 1089 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 1090 if (m == NULL) 1091 goto msgfail; 1092 m_cat(result, m); 1093 1094 /* set sadb_address for saidx's. */ 1095 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.src.sa, 1096 sav->sah->saidx.src.sa.sa_len << 3, IPSEC_ULPROTO_ANY); 1097 if (m == NULL) 1098 goto msgfail; 1099 m_cat(result, m); 1100 1101 /* create SA extension */ 1102 m = key_setsadbsa(sav); 1103 if (m == NULL) 1104 goto msgfail; 1105 m_cat(result, m); 1106 1107 if (result->m_len < sizeof(struct sadb_msg)) { 1108 result = m_pullup(result, sizeof(struct sadb_msg)); 1109 if (result == NULL) 1110 goto msgfail; 1111 } 1112 1113 result->m_pkthdr.len = 0; 1114 for (m = result; m; m = m->m_next) 1115 result->m_pkthdr.len += m->m_len; 1116 mtod(result, struct sadb_msg *)->sadb_msg_len = 1117 PFKEY_UNIT64(result->m_pkthdr.len); 1118 1119 key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 1120 result = NULL; 1121 msgfail: 1122 if (result) 1123 m_freem(result); 1124 } 1125 #endif 1126 1127 /* 1128 * allocating a usable SA entry for a *INBOUND* packet. 1129 * Must call key_freesav() later. 1130 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state). 1131 * NULL: not found, or error occurred. 1132 * 1133 * In the comparison, no source address is used--for RFC2401 conformance. 1134 * To quote, from section 4.1: 1135 * A security association is uniquely identified by a triple consisting 1136 * of a Security Parameter Index (SPI), an IP Destination Address, and a 1137 * security protocol (AH or ESP) identifier. 1138 * Note that, however, we do need to keep source address in IPsec SA. 1139 * IKE specification and PF_KEY specification do assume that we 1140 * keep source address in IPsec SA. We see a tricky situation here. 1141 * 1142 * sport and dport are used for NAT-T. network order is always used. 1143 */ 1144 struct secasvar * 1145 key_lookup_sa( 1146 const union sockaddr_union *dst, 1147 u_int proto, 1148 u_int32_t spi, 1149 u_int16_t sport, 1150 u_int16_t dport, 1151 const char* where, int tag) 1152 { 1153 struct secashead *sah; 1154 struct secasvar *sav; 1155 u_int stateidx, state; 1156 const u_int *saorder_state_valid; 1157 int arraysize, chkport; 1158 int s; 1159 1160 int must_check_spi = 1; 1161 int must_check_alg = 0; 1162 u_int16_t cpi = 0; 1163 u_int8_t algo = 0; 1164 1165 if ((sport != 0) && (dport != 0)) 1166 chkport = PORT_STRICT; 1167 else 1168 chkport = PORT_NONE; 1169 1170 KASSERT(dst != NULL); 1171 1172 /* 1173 * XXX IPCOMP case 1174 * We use cpi to define spi here. In the case where cpi <= 1175 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not 1176 * the real spi. In this case, don't check the spi but check the 1177 * algorithm 1178 */ 1179 1180 if (proto == IPPROTO_IPCOMP) { 1181 u_int32_t tmp; 1182 tmp = ntohl(spi); 1183 cpi = (u_int16_t) tmp; 1184 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) { 1185 algo = (u_int8_t) cpi; 1186 must_check_spi = 0; 1187 must_check_alg = 1; 1188 } 1189 } 1190 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1191 "DP from %s:%u check_spi=%d, check_alg=%d\n", 1192 where, tag, must_check_spi, must_check_alg); 1193 1194 1195 /* 1196 * searching SAD. 1197 * XXX: to be checked internal IP header somewhere. Also when 1198 * IPsec tunnel packet is received. But ESP tunnel mode is 1199 * encrypted so we can't check internal IP header. 1200 */ 1201 if (key_prefered_oldsa) { 1202 saorder_state_valid = saorder_state_valid_prefer_old; 1203 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old); 1204 } else { 1205 saorder_state_valid = saorder_state_valid_prefer_new; 1206 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new); 1207 } 1208 s = pserialize_read_enter(); 1209 SAHLIST_READER_FOREACH(sah) { 1210 /* search valid state */ 1211 for (stateidx = 0; stateidx < arraysize; stateidx++) { 1212 state = saorder_state_valid[stateidx]; 1213 SAVLIST_READER_FOREACH(sav, sah, state) { 1214 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1215 "try match spi %#x, %#x\n", 1216 ntohl(spi), ntohl(sav->spi)); 1217 /* sanity check */ 1218 KEY_CHKSASTATE(sav->state, state); 1219 /* do not return entries w/ unusable state */ 1220 if (!SADB_SASTATE_USABLE_P(sav)) { 1221 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1222 "bad state %d\n", sav->state); 1223 continue; 1224 } 1225 if (proto != sav->sah->saidx.proto) { 1226 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1227 "proto fail %d != %d\n", 1228 proto, sav->sah->saidx.proto); 1229 continue; 1230 } 1231 if (must_check_spi && spi != sav->spi) { 1232 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1233 "spi fail %#x != %#x\n", 1234 ntohl(spi), ntohl(sav->spi)); 1235 continue; 1236 } 1237 /* XXX only on the ipcomp case */ 1238 if (must_check_alg && algo != sav->alg_comp) { 1239 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 1240 "algo fail %d != %d\n", 1241 algo, sav->alg_comp); 1242 continue; 1243 } 1244 1245 #if 0 /* don't check src */ 1246 /* Fix port in src->sa */ 1247 1248 /* check src address */ 1249 if (!key_sockaddr_match(&src->sa, &sav->sah->saidx.src.sa, PORT_NONE)) 1250 continue; 1251 #endif 1252 /* fix port of dst address XXX*/ 1253 key_porttosaddr(__UNCONST(dst), dport); 1254 /* check dst address */ 1255 if (!key_sockaddr_match(&dst->sa, &sav->sah->saidx.dst.sa, chkport)) 1256 continue; 1257 SA_ADDREF2(sav, where, tag); 1258 goto done; 1259 } 1260 } 1261 } 1262 sav = NULL; 1263 done: 1264 pserialize_read_exit(s); 1265 1266 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1267 "DP return SA:%p; refcnt %u\n", sav, sav ? sav->refcnt : 0); 1268 return sav; 1269 } 1270 1271 static void 1272 key_validate_savlist(const struct secashead *sah, const u_int state) 1273 { 1274 #ifdef DEBUG 1275 struct secasvar *sav, *next; 1276 int s; 1277 1278 /* 1279 * The list should be sorted by lft_c->sadb_lifetime_addtime 1280 * in ascending order. 1281 */ 1282 s = pserialize_read_enter(); 1283 SAVLIST_READER_FOREACH(sav, sah, state) { 1284 next = SAVLIST_READER_NEXT(sav); 1285 if (next != NULL && 1286 sav->lft_c != NULL && next->lft_c != NULL) { 1287 KDASSERTMSG(sav->lft_c->sadb_lifetime_addtime <= 1288 next->lft_c->sadb_lifetime_addtime, 1289 "savlist is not sorted: sah=%p, state=%d, " 1290 "sav=%" PRIu64 ", next=%" PRIu64, sah, state, 1291 sav->lft_c->sadb_lifetime_addtime, 1292 next->lft_c->sadb_lifetime_addtime); 1293 } 1294 } 1295 pserialize_read_exit(s); 1296 #endif 1297 } 1298 1299 void 1300 key_init_sp(struct secpolicy *sp) 1301 { 1302 1303 ASSERT_SLEEPABLE(); 1304 1305 sp->state = IPSEC_SPSTATE_ALIVE; 1306 if (sp->policy == IPSEC_POLICY_IPSEC) 1307 KASSERT(sp->req != NULL); 1308 localcount_init(&sp->localcount); 1309 SPLIST_ENTRY_INIT(sp); 1310 } 1311 1312 /* 1313 * Must be called in a pserialize critical section. A held SP 1314 * must be released by key_sp_unref after use. 1315 */ 1316 void 1317 key_sp_ref(struct secpolicy *sp, const char* where, int tag) 1318 { 1319 1320 localcount_acquire(&sp->localcount); 1321 1322 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1323 "DP SP:%p (ID=%u) from %s:%u; refcnt++ now %u\n", 1324 sp, sp->id, where, tag, key_sp_refcnt(sp)); 1325 } 1326 1327 /* 1328 * Must be called without holding key_spd.lock because the lock 1329 * would be held in localcount_release. 1330 */ 1331 void 1332 key_sp_unref(struct secpolicy *sp, const char* where, int tag) 1333 { 1334 1335 KDASSERT(mutex_ownable(&key_spd.lock)); 1336 1337 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1338 "DP SP:%p (ID=%u) from %s:%u; refcnt-- now %u\n", 1339 sp, sp->id, where, tag, key_sp_refcnt(sp)); 1340 1341 localcount_release(&sp->localcount, &key_spd.cv, &key_spd.lock); 1342 } 1343 1344 void 1345 key_sa_ref(struct secasvar *sav, const char* where, int tag) 1346 { 1347 1348 SA_ADDREF2(sav, where, tag); 1349 1350 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1351 "DP cause refcnt++:%d SA:%p from %s:%u\n", 1352 sav->refcnt, sav, where, tag); 1353 } 1354 1355 #if 0 1356 /* 1357 * Must be called after calling key_lookup_sp*(). 1358 * For the packet with socket. 1359 */ 1360 static void 1361 key_freeso(struct socket *so) 1362 { 1363 /* sanity check */ 1364 KASSERT(so != NULL); 1365 1366 switch (so->so_proto->pr_domain->dom_family) { 1367 #ifdef INET 1368 case PF_INET: 1369 { 1370 struct inpcb *pcb = sotoinpcb(so); 1371 1372 /* Does it have a PCB ? */ 1373 if (pcb == NULL) 1374 return; 1375 1376 struct inpcbpolicy *sp = pcb->inp_sp; 1377 key_freesp_so(&sp->sp_in); 1378 key_freesp_so(&sp->sp_out); 1379 } 1380 break; 1381 #endif 1382 #ifdef INET6 1383 case PF_INET6: 1384 { 1385 #ifdef HAVE_NRL_INPCB 1386 struct inpcb *pcb = sotoinpcb(so); 1387 struct inpcbpolicy *sp = pcb->inp_sp; 1388 1389 /* Does it have a PCB ? */ 1390 if (pcb == NULL) 1391 return; 1392 key_freesp_so(&sp->sp_in); 1393 key_freesp_so(&sp->sp_out); 1394 #else 1395 struct in6pcb *pcb = sotoin6pcb(so); 1396 1397 /* Does it have a PCB ? */ 1398 if (pcb == NULL) 1399 return; 1400 key_freesp_so(&pcb->in6p_sp->sp_in); 1401 key_freesp_so(&pcb->in6p_sp->sp_out); 1402 #endif 1403 } 1404 break; 1405 #endif /* INET6 */ 1406 default: 1407 IPSECLOG(LOG_DEBUG, "unknown address family=%d.\n", 1408 so->so_proto->pr_domain->dom_family); 1409 return; 1410 } 1411 } 1412 1413 static void 1414 key_freesp_so(struct secpolicy **sp) 1415 { 1416 1417 KASSERT(sp != NULL); 1418 KASSERT(*sp != NULL); 1419 1420 if ((*sp)->policy == IPSEC_POLICY_ENTRUST || 1421 (*sp)->policy == IPSEC_POLICY_BYPASS) 1422 return; 1423 1424 KASSERTMSG((*sp)->policy == IPSEC_POLICY_IPSEC, 1425 "invalid policy %u", (*sp)->policy); 1426 KEY_SP_UNREF(&sp); 1427 } 1428 #endif 1429 1430 /* 1431 * Must be called after calling key_lookup_sa(). 1432 * This function is called by key_freesp() to free some SA allocated 1433 * for a policy. 1434 */ 1435 void 1436 key_freesav(struct secasvar **psav, const char* where, int tag) 1437 { 1438 struct secasvar *sav = *psav; 1439 unsigned int nv; 1440 1441 KASSERT(sav != NULL); 1442 1443 SA_DELREF2(sav, nv, where, tag); 1444 1445 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1446 "DP SA:%p (SPI %lu) from %s:%u; refcnt now %u\n", 1447 sav, (u_long)ntohl(sav->spi), where, tag, nv); 1448 1449 if (nv == 0) { 1450 *psav = NULL; 1451 1452 /* remove from SA header */ 1453 SAVLIST_WRITER_REMOVE(sav); 1454 1455 key_delsav(sav); 1456 } 1457 } 1458 1459 /* %%% SPD management */ 1460 /* 1461 * free security policy entry. 1462 */ 1463 static void 1464 key_destroy_sp(struct secpolicy *sp) 1465 { 1466 1467 SPLIST_ENTRY_DESTROY(sp); 1468 localcount_fini(&sp->localcount); 1469 1470 key_free_sp(sp); 1471 1472 key_update_used(); 1473 } 1474 1475 void 1476 key_free_sp(struct secpolicy *sp) 1477 { 1478 struct ipsecrequest *isr = sp->req, *nextisr; 1479 1480 while (isr != NULL) { 1481 nextisr = isr->next; 1482 kmem_free(isr, sizeof(*isr)); 1483 isr = nextisr; 1484 } 1485 1486 kmem_free(sp, sizeof(*sp)); 1487 } 1488 1489 void 1490 key_socksplist_add(struct secpolicy *sp) 1491 { 1492 1493 mutex_enter(&key_spd.lock); 1494 PSLIST_WRITER_INSERT_HEAD(&key_spd.socksplist, sp, pslist_entry); 1495 mutex_exit(&key_spd.lock); 1496 1497 key_update_used(); 1498 } 1499 1500 /* 1501 * search SPD 1502 * OUT: NULL : not found 1503 * others : found, pointer to a SP. 1504 */ 1505 static struct secpolicy * 1506 key_getsp(const struct secpolicyindex *spidx) 1507 { 1508 struct secpolicy *sp; 1509 int s; 1510 1511 KASSERT(spidx != NULL); 1512 1513 s = pserialize_read_enter(); 1514 SPLIST_READER_FOREACH(sp, spidx->dir) { 1515 if (sp->state == IPSEC_SPSTATE_DEAD) 1516 continue; 1517 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1518 KEY_SP_REF(sp); 1519 pserialize_read_exit(s); 1520 return sp; 1521 } 1522 } 1523 pserialize_read_exit(s); 1524 1525 return NULL; 1526 } 1527 1528 /* 1529 * search SPD and remove found SP 1530 * OUT: NULL : not found 1531 * others : found, pointer to a SP. 1532 */ 1533 static struct secpolicy * 1534 key_lookup_and_remove_sp(const struct secpolicyindex *spidx) 1535 { 1536 struct secpolicy *sp = NULL; 1537 1538 mutex_enter(&key_spd.lock); 1539 SPLIST_WRITER_FOREACH(sp, spidx->dir) { 1540 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1541 1542 if (key_spidx_match_exactly(spidx, &sp->spidx)) { 1543 key_unlink_sp(sp); 1544 goto out; 1545 } 1546 } 1547 sp = NULL; 1548 out: 1549 mutex_exit(&key_spd.lock); 1550 1551 return sp; 1552 } 1553 1554 /* 1555 * get SP by index. 1556 * OUT: NULL : not found 1557 * others : found, pointer to a SP. 1558 */ 1559 static struct secpolicy * 1560 key_getspbyid(u_int32_t id) 1561 { 1562 struct secpolicy *sp; 1563 int s; 1564 1565 s = pserialize_read_enter(); 1566 SPLIST_READER_FOREACH(sp, IPSEC_DIR_INBOUND) { 1567 if (sp->state == IPSEC_SPSTATE_DEAD) 1568 continue; 1569 if (sp->id == id) { 1570 KEY_SP_REF(sp); 1571 goto out; 1572 } 1573 } 1574 1575 SPLIST_READER_FOREACH(sp, IPSEC_DIR_OUTBOUND) { 1576 if (sp->state == IPSEC_SPSTATE_DEAD) 1577 continue; 1578 if (sp->id == id) { 1579 KEY_SP_REF(sp); 1580 goto out; 1581 } 1582 } 1583 out: 1584 pserialize_read_exit(s); 1585 return sp; 1586 } 1587 1588 /* 1589 * get SP by index, remove and return it. 1590 * OUT: NULL : not found 1591 * others : found, pointer to a SP. 1592 */ 1593 static struct secpolicy * 1594 key_lookupbyid_and_remove_sp(u_int32_t id) 1595 { 1596 struct secpolicy *sp; 1597 1598 mutex_enter(&key_spd.lock); 1599 SPLIST_READER_FOREACH(sp, IPSEC_DIR_INBOUND) { 1600 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1601 if (sp->id == id) 1602 goto out; 1603 } 1604 1605 SPLIST_READER_FOREACH(sp, IPSEC_DIR_OUTBOUND) { 1606 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 1607 if (sp->id == id) 1608 goto out; 1609 } 1610 out: 1611 if (sp != NULL) 1612 key_unlink_sp(sp); 1613 mutex_exit(&key_spd.lock); 1614 return sp; 1615 } 1616 1617 struct secpolicy * 1618 key_newsp(const char* where, int tag) 1619 { 1620 struct secpolicy *newsp = NULL; 1621 1622 newsp = kmem_zalloc(sizeof(struct secpolicy), KM_SLEEP); 1623 1624 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 1625 "DP from %s:%u return SP:%p\n", where, tag, newsp); 1626 return newsp; 1627 } 1628 1629 /* 1630 * create secpolicy structure from sadb_x_policy structure. 1631 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set, 1632 * so must be set properly later. 1633 */ 1634 struct secpolicy * 1635 key_msg2sp(const struct sadb_x_policy *xpl0, size_t len, int *error) 1636 { 1637 struct secpolicy *newsp; 1638 1639 KASSERT(!cpu_softintr_p()); 1640 KASSERT(xpl0 != NULL); 1641 KASSERT(len >= sizeof(*xpl0)); 1642 1643 if (len != PFKEY_EXTLEN(xpl0)) { 1644 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1645 *error = EINVAL; 1646 return NULL; 1647 } 1648 1649 newsp = KEY_NEWSP(); 1650 if (newsp == NULL) { 1651 *error = ENOBUFS; 1652 return NULL; 1653 } 1654 1655 newsp->spidx.dir = xpl0->sadb_x_policy_dir; 1656 newsp->policy = xpl0->sadb_x_policy_type; 1657 1658 /* check policy */ 1659 switch (xpl0->sadb_x_policy_type) { 1660 case IPSEC_POLICY_DISCARD: 1661 case IPSEC_POLICY_NONE: 1662 case IPSEC_POLICY_ENTRUST: 1663 case IPSEC_POLICY_BYPASS: 1664 newsp->req = NULL; 1665 *error = 0; 1666 return newsp; 1667 1668 case IPSEC_POLICY_IPSEC: 1669 /* Continued */ 1670 break; 1671 default: 1672 IPSECLOG(LOG_DEBUG, "invalid policy type.\n"); 1673 key_free_sp(newsp); 1674 *error = EINVAL; 1675 return NULL; 1676 } 1677 1678 /* IPSEC_POLICY_IPSEC */ 1679 { 1680 int tlen; 1681 const struct sadb_x_ipsecrequest *xisr; 1682 uint16_t xisr_reqid; 1683 struct ipsecrequest **p_isr = &newsp->req; 1684 1685 /* validity check */ 1686 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) { 1687 IPSECLOG(LOG_DEBUG, "Invalid msg length.\n"); 1688 *error = EINVAL; 1689 goto free_exit; 1690 } 1691 1692 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0); 1693 xisr = (const struct sadb_x_ipsecrequest *)(xpl0 + 1); 1694 1695 while (tlen > 0) { 1696 /* length check */ 1697 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) { 1698 IPSECLOG(LOG_DEBUG, "invalid ipsecrequest length.\n"); 1699 *error = EINVAL; 1700 goto free_exit; 1701 } 1702 1703 /* allocate request buffer */ 1704 *p_isr = kmem_zalloc(sizeof(**p_isr), KM_SLEEP); 1705 1706 /* set values */ 1707 (*p_isr)->next = NULL; 1708 1709 switch (xisr->sadb_x_ipsecrequest_proto) { 1710 case IPPROTO_ESP: 1711 case IPPROTO_AH: 1712 case IPPROTO_IPCOMP: 1713 break; 1714 default: 1715 IPSECLOG(LOG_DEBUG, "invalid proto type=%u\n", 1716 xisr->sadb_x_ipsecrequest_proto); 1717 *error = EPROTONOSUPPORT; 1718 goto free_exit; 1719 } 1720 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto; 1721 1722 switch (xisr->sadb_x_ipsecrequest_mode) { 1723 case IPSEC_MODE_TRANSPORT: 1724 case IPSEC_MODE_TUNNEL: 1725 break; 1726 case IPSEC_MODE_ANY: 1727 default: 1728 IPSECLOG(LOG_DEBUG, "invalid mode=%u\n", 1729 xisr->sadb_x_ipsecrequest_mode); 1730 *error = EINVAL; 1731 goto free_exit; 1732 } 1733 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode; 1734 1735 switch (xisr->sadb_x_ipsecrequest_level) { 1736 case IPSEC_LEVEL_DEFAULT: 1737 case IPSEC_LEVEL_USE: 1738 case IPSEC_LEVEL_REQUIRE: 1739 break; 1740 case IPSEC_LEVEL_UNIQUE: 1741 xisr_reqid = xisr->sadb_x_ipsecrequest_reqid; 1742 /* validity check */ 1743 /* 1744 * If range violation of reqid, kernel will 1745 * update it, don't refuse it. 1746 */ 1747 if (xisr_reqid > IPSEC_MANUAL_REQID_MAX) { 1748 IPSECLOG(LOG_DEBUG, 1749 "reqid=%d range " 1750 "violation, updated by kernel.\n", 1751 xisr_reqid); 1752 xisr_reqid = 0; 1753 } 1754 1755 /* allocate new reqid id if reqid is zero. */ 1756 if (xisr_reqid == 0) { 1757 u_int16_t reqid = key_newreqid(); 1758 if (reqid == 0) { 1759 *error = ENOBUFS; 1760 goto free_exit; 1761 } 1762 (*p_isr)->saidx.reqid = reqid; 1763 } else { 1764 /* set it for manual keying. */ 1765 (*p_isr)->saidx.reqid = xisr_reqid; 1766 } 1767 break; 1768 1769 default: 1770 IPSECLOG(LOG_DEBUG, "invalid level=%u\n", 1771 xisr->sadb_x_ipsecrequest_level); 1772 *error = EINVAL; 1773 goto free_exit; 1774 } 1775 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level; 1776 1777 /* set IP addresses if there */ 1778 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 1779 const struct sockaddr *paddr; 1780 1781 paddr = (const struct sockaddr *)(xisr + 1); 1782 1783 /* validity check */ 1784 if (paddr->sa_len > sizeof((*p_isr)->saidx.src)) { 1785 IPSECLOG(LOG_DEBUG, "invalid request " 1786 "address length.\n"); 1787 *error = EINVAL; 1788 goto free_exit; 1789 } 1790 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len); 1791 1792 paddr = (const struct sockaddr *)((const char *)paddr 1793 + paddr->sa_len); 1794 1795 /* validity check */ 1796 if (paddr->sa_len > sizeof((*p_isr)->saidx.dst)) { 1797 IPSECLOG(LOG_DEBUG, "invalid request " 1798 "address length.\n"); 1799 *error = EINVAL; 1800 goto free_exit; 1801 } 1802 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len); 1803 } 1804 1805 (*p_isr)->sp = newsp; 1806 1807 /* initialization for the next. */ 1808 p_isr = &(*p_isr)->next; 1809 tlen -= xisr->sadb_x_ipsecrequest_len; 1810 1811 /* validity check */ 1812 if (tlen < 0) { 1813 IPSECLOG(LOG_DEBUG, "becoming tlen < 0.\n"); 1814 *error = EINVAL; 1815 goto free_exit; 1816 } 1817 1818 xisr = (const struct sadb_x_ipsecrequest *)((const char *)xisr + 1819 xisr->sadb_x_ipsecrequest_len); 1820 } 1821 } 1822 1823 *error = 0; 1824 return newsp; 1825 1826 free_exit: 1827 key_free_sp(newsp); 1828 return NULL; 1829 } 1830 1831 static u_int16_t 1832 key_newreqid(void) 1833 { 1834 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1; 1835 1836 auto_reqid = (auto_reqid == 0xffff ? 1837 IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1); 1838 1839 /* XXX should be unique check */ 1840 1841 return auto_reqid; 1842 } 1843 1844 /* 1845 * copy secpolicy struct to sadb_x_policy structure indicated. 1846 */ 1847 struct mbuf * 1848 key_sp2msg(const struct secpolicy *sp) 1849 { 1850 struct sadb_x_policy *xpl; 1851 int tlen; 1852 char *p; 1853 struct mbuf *m; 1854 1855 KASSERT(sp != NULL); 1856 1857 tlen = key_getspreqmsglen(sp); 1858 1859 m = key_alloc_mbuf(tlen); 1860 if (!m || m->m_next) { /*XXX*/ 1861 if (m) 1862 m_freem(m); 1863 return NULL; 1864 } 1865 1866 m->m_len = tlen; 1867 m->m_next = NULL; 1868 xpl = mtod(m, struct sadb_x_policy *); 1869 memset(xpl, 0, tlen); 1870 1871 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen); 1872 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 1873 xpl->sadb_x_policy_type = sp->policy; 1874 xpl->sadb_x_policy_dir = sp->spidx.dir; 1875 xpl->sadb_x_policy_id = sp->id; 1876 p = (char *)xpl + sizeof(*xpl); 1877 1878 /* if is the policy for ipsec ? */ 1879 if (sp->policy == IPSEC_POLICY_IPSEC) { 1880 struct sadb_x_ipsecrequest *xisr; 1881 struct ipsecrequest *isr; 1882 1883 for (isr = sp->req; isr != NULL; isr = isr->next) { 1884 1885 xisr = (struct sadb_x_ipsecrequest *)p; 1886 1887 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto; 1888 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode; 1889 xisr->sadb_x_ipsecrequest_level = isr->level; 1890 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid; 1891 1892 p += sizeof(*xisr); 1893 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len); 1894 p += isr->saidx.src.sa.sa_len; 1895 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len); 1896 p += isr->saidx.src.sa.sa_len; 1897 1898 xisr->sadb_x_ipsecrequest_len = 1899 PFKEY_ALIGN8(sizeof(*xisr) 1900 + isr->saidx.src.sa.sa_len 1901 + isr->saidx.dst.sa.sa_len); 1902 } 1903 } 1904 1905 return m; 1906 } 1907 1908 /* m will not be freed nor modified */ 1909 static struct mbuf * 1910 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp, 1911 int ndeep, int nitem, ...) 1912 { 1913 va_list ap; 1914 int idx; 1915 int i; 1916 struct mbuf *result = NULL, *n; 1917 int len; 1918 1919 KASSERT(m != NULL); 1920 KASSERT(mhp != NULL); 1921 1922 va_start(ap, nitem); 1923 for (i = 0; i < nitem; i++) { 1924 idx = va_arg(ap, int); 1925 if (idx < 0 || idx > SADB_EXT_MAX) 1926 goto fail; 1927 /* don't attempt to pull empty extension */ 1928 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL) 1929 continue; 1930 if (idx != SADB_EXT_RESERVED && 1931 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0)) 1932 continue; 1933 1934 if (idx == SADB_EXT_RESERVED) { 1935 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MHLEN); 1936 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 1937 MGETHDR(n, M_DONTWAIT, MT_DATA); 1938 if (!n) 1939 goto fail; 1940 n->m_len = len; 1941 n->m_next = NULL; 1942 m_copydata(m, 0, sizeof(struct sadb_msg), 1943 mtod(n, void *)); 1944 } else if (i < ndeep) { 1945 len = mhp->extlen[idx]; 1946 n = key_alloc_mbuf(len); 1947 if (!n || n->m_next) { /*XXX*/ 1948 if (n) 1949 m_freem(n); 1950 goto fail; 1951 } 1952 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx], 1953 mtod(n, void *)); 1954 } else { 1955 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx], 1956 M_DONTWAIT); 1957 } 1958 if (n == NULL) 1959 goto fail; 1960 1961 if (result) 1962 m_cat(result, n); 1963 else 1964 result = n; 1965 } 1966 va_end(ap); 1967 1968 if (result && (result->m_flags & M_PKTHDR) != 0) { 1969 result->m_pkthdr.len = 0; 1970 for (n = result; n; n = n->m_next) 1971 result->m_pkthdr.len += n->m_len; 1972 } 1973 1974 return result; 1975 1976 fail: 1977 va_end(ap); 1978 m_freem(result); 1979 return NULL; 1980 } 1981 1982 /* 1983 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing 1984 * add an entry to SP database, when received 1985 * <base, address(SD), (lifetime(H),) policy> 1986 * from the user(?). 1987 * Adding to SP database, 1988 * and send 1989 * <base, address(SD), (lifetime(H),) policy> 1990 * to the socket which was send. 1991 * 1992 * SPDADD set a unique policy entry. 1993 * SPDSETIDX like SPDADD without a part of policy requests. 1994 * SPDUPDATE replace a unique policy entry. 1995 * 1996 * m will always be freed. 1997 */ 1998 static int 1999 key_api_spdadd(struct socket *so, struct mbuf *m, 2000 const struct sadb_msghdr *mhp) 2001 { 2002 const struct sockaddr *src, *dst; 2003 const struct sadb_x_policy *xpl0; 2004 struct sadb_x_policy *xpl; 2005 const struct sadb_lifetime *lft = NULL; 2006 struct secpolicyindex spidx; 2007 struct secpolicy *newsp; 2008 int error; 2009 2010 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2011 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2012 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2013 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2014 return key_senderror(so, m, EINVAL); 2015 } 2016 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2017 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2018 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2019 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2020 return key_senderror(so, m, EINVAL); 2021 } 2022 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) { 2023 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < 2024 sizeof(struct sadb_lifetime)) { 2025 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2026 return key_senderror(so, m, EINVAL); 2027 } 2028 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 2029 } 2030 2031 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2032 2033 /* checking the direciton. */ 2034 switch (xpl0->sadb_x_policy_dir) { 2035 case IPSEC_DIR_INBOUND: 2036 case IPSEC_DIR_OUTBOUND: 2037 break; 2038 default: 2039 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2040 return key_senderror(so, m, EINVAL); 2041 } 2042 2043 /* check policy */ 2044 /* key_api_spdadd() accepts DISCARD, NONE and IPSEC. */ 2045 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST || 2046 xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) { 2047 IPSECLOG(LOG_DEBUG, "Invalid policy type.\n"); 2048 return key_senderror(so, m, EINVAL); 2049 } 2050 2051 /* policy requests are mandatory when action is ipsec. */ 2052 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX && 2053 xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC && 2054 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) { 2055 IPSECLOG(LOG_DEBUG, "some policy requests part required.\n"); 2056 return key_senderror(so, m, EINVAL); 2057 } 2058 2059 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 2060 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 2061 2062 /* sanity check on addr pair */ 2063 if (src->sa_family != dst->sa_family) 2064 return key_senderror(so, m, EINVAL); 2065 if (src->sa_len != dst->sa_len) 2066 return key_senderror(so, m, EINVAL); 2067 2068 key_init_spidx_bymsghdr(&spidx, mhp); 2069 2070 /* 2071 * checking there is SP already or not. 2072 * SPDUPDATE doesn't depend on whether there is a SP or not. 2073 * If the type is either SPDADD or SPDSETIDX AND a SP is found, 2074 * then error. 2075 */ 2076 { 2077 struct secpolicy *sp; 2078 2079 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 2080 sp = key_lookup_and_remove_sp(&spidx); 2081 if (sp != NULL) 2082 key_destroy_sp(sp); 2083 } else { 2084 sp = key_getsp(&spidx); 2085 if (sp != NULL) { 2086 KEY_SP_UNREF(&sp); 2087 IPSECLOG(LOG_DEBUG, "a SP entry exists already.\n"); 2088 return key_senderror(so, m, EEXIST); 2089 } 2090 } 2091 } 2092 2093 /* allocation new SP entry */ 2094 newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error); 2095 if (newsp == NULL) { 2096 return key_senderror(so, m, error); 2097 } 2098 2099 newsp->id = key_getnewspid(); 2100 if (newsp->id == 0) { 2101 kmem_free(newsp, sizeof(*newsp)); 2102 return key_senderror(so, m, ENOBUFS); 2103 } 2104 2105 newsp->spidx = spidx; 2106 newsp->created = time_uptime; 2107 newsp->lastused = newsp->created; 2108 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0; 2109 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0; 2110 2111 key_init_sp(newsp); 2112 2113 mutex_enter(&key_spd.lock); 2114 SPLIST_WRITER_INSERT_TAIL(newsp->spidx.dir, newsp); 2115 mutex_exit(&key_spd.lock); 2116 2117 #ifdef notyet 2118 /* delete the entry in key_misc.spacqlist */ 2119 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) { 2120 struct secspacq *spacq = key_getspacq(&spidx); 2121 if (spacq != NULL) { 2122 /* reset counter in order to deletion by timehandler. */ 2123 spacq->created = time_uptime; 2124 spacq->count = 0; 2125 } 2126 } 2127 #endif 2128 2129 /* Invalidate all cached SPD pointers in the PCBs. */ 2130 ipsec_invalpcbcacheall(); 2131 2132 #if defined(GATEWAY) 2133 /* Invalidate the ipflow cache, as well. */ 2134 ipflow_invalidate_all(0); 2135 #ifdef INET6 2136 if (in6_present) 2137 ip6flow_invalidate_all(0); 2138 #endif /* INET6 */ 2139 #endif /* GATEWAY */ 2140 2141 key_update_used(); 2142 2143 { 2144 struct mbuf *n, *mpolicy; 2145 int off; 2146 2147 /* create new sadb_msg to reply. */ 2148 if (lft) { 2149 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED, 2150 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD, 2151 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2152 } else { 2153 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED, 2154 SADB_X_EXT_POLICY, 2155 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2156 } 2157 if (!n) 2158 return key_senderror(so, m, ENOBUFS); 2159 2160 n = key_fill_replymsg(n, 0); 2161 if (n == NULL) 2162 return key_senderror(so, m, ENOBUFS); 2163 2164 off = 0; 2165 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)), 2166 sizeof(*xpl), &off); 2167 if (mpolicy == NULL) { 2168 /* n is already freed */ 2169 return key_senderror(so, m, ENOBUFS); 2170 } 2171 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off); 2172 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 2173 m_freem(n); 2174 return key_senderror(so, m, EINVAL); 2175 } 2176 xpl->sadb_x_policy_id = newsp->id; 2177 2178 m_freem(m); 2179 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2180 } 2181 } 2182 2183 /* 2184 * get new policy id. 2185 * OUT: 2186 * 0: failure. 2187 * others: success. 2188 */ 2189 static u_int32_t 2190 key_getnewspid(void) 2191 { 2192 u_int32_t newid = 0; 2193 int count = key_spi_trycnt; /* XXX */ 2194 struct secpolicy *sp; 2195 2196 /* when requesting to allocate spi ranged */ 2197 while (count--) { 2198 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1)); 2199 2200 sp = key_getspbyid(newid); 2201 if (sp == NULL) 2202 break; 2203 2204 KEY_SP_UNREF(&sp); 2205 } 2206 2207 if (count == 0 || newid == 0) { 2208 IPSECLOG(LOG_DEBUG, "to allocate policy id is failed.\n"); 2209 return 0; 2210 } 2211 2212 return newid; 2213 } 2214 2215 /* 2216 * SADB_SPDDELETE processing 2217 * receive 2218 * <base, address(SD), policy(*)> 2219 * from the user(?), and set SADB_SASTATE_DEAD, 2220 * and send, 2221 * <base, address(SD), policy(*)> 2222 * to the ikmpd. 2223 * policy(*) including direction of policy. 2224 * 2225 * m will always be freed. 2226 */ 2227 static int 2228 key_api_spddelete(struct socket *so, struct mbuf *m, 2229 const struct sadb_msghdr *mhp) 2230 { 2231 struct sadb_x_policy *xpl0; 2232 struct secpolicyindex spidx; 2233 struct secpolicy *sp; 2234 2235 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 2236 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 2237 mhp->ext[SADB_X_EXT_POLICY] == NULL) { 2238 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2239 return key_senderror(so, m, EINVAL); 2240 } 2241 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 2242 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 2243 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2244 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2245 return key_senderror(so, m, EINVAL); 2246 } 2247 2248 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 2249 2250 /* checking the direciton. */ 2251 switch (xpl0->sadb_x_policy_dir) { 2252 case IPSEC_DIR_INBOUND: 2253 case IPSEC_DIR_OUTBOUND: 2254 break; 2255 default: 2256 IPSECLOG(LOG_DEBUG, "Invalid SP direction.\n"); 2257 return key_senderror(so, m, EINVAL); 2258 } 2259 2260 /* make secindex */ 2261 key_init_spidx_bymsghdr(&spidx, mhp); 2262 2263 /* Is there SP in SPD ? */ 2264 sp = key_lookup_and_remove_sp(&spidx); 2265 if (sp == NULL) { 2266 IPSECLOG(LOG_DEBUG, "no SP found.\n"); 2267 return key_senderror(so, m, EINVAL); 2268 } 2269 2270 /* save policy id to buffer to be returned. */ 2271 xpl0->sadb_x_policy_id = sp->id; 2272 2273 key_destroy_sp(sp); 2274 2275 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2276 2277 { 2278 struct mbuf *n; 2279 2280 /* create new sadb_msg to reply. */ 2281 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 2282 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 2283 if (!n) 2284 return key_senderror(so, m, ENOBUFS); 2285 2286 n = key_fill_replymsg(n, 0); 2287 if (n == NULL) 2288 return key_senderror(so, m, ENOBUFS); 2289 2290 m_freem(m); 2291 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2292 } 2293 } 2294 2295 /* 2296 * SADB_SPDDELETE2 processing 2297 * receive 2298 * <base, policy(*)> 2299 * from the user(?), and set SADB_SASTATE_DEAD, 2300 * and send, 2301 * <base, policy(*)> 2302 * to the ikmpd. 2303 * policy(*) including direction of policy. 2304 * 2305 * m will always be freed. 2306 */ 2307 static int 2308 key_api_spddelete2(struct socket *so, struct mbuf *m, 2309 const struct sadb_msghdr *mhp) 2310 { 2311 u_int32_t id; 2312 struct secpolicy *sp; 2313 2314 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2315 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2316 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2317 return key_senderror(so, m, EINVAL); 2318 } 2319 2320 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2321 2322 /* Is there SP in SPD ? */ 2323 sp = key_lookupbyid_and_remove_sp(id); 2324 if (sp == NULL) { 2325 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2326 return key_senderror(so, m, EINVAL); 2327 } 2328 2329 key_destroy_sp(sp); 2330 2331 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2332 2333 { 2334 struct mbuf *n, *nn; 2335 int off, len; 2336 2337 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 2338 2339 /* create new sadb_msg to reply. */ 2340 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2341 2342 MGETHDR(n, M_DONTWAIT, MT_DATA); 2343 if (n && len > MHLEN) { 2344 MCLGET(n, M_DONTWAIT); 2345 if ((n->m_flags & M_EXT) == 0) { 2346 m_freem(n); 2347 n = NULL; 2348 } 2349 } 2350 if (!n) 2351 return key_senderror(so, m, ENOBUFS); 2352 2353 n->m_len = len; 2354 n->m_next = NULL; 2355 off = 0; 2356 2357 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 2358 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2359 2360 KASSERTMSG(off == len, "length inconsistency"); 2361 2362 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY], 2363 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT); 2364 if (!n->m_next) { 2365 m_freem(n); 2366 return key_senderror(so, m, ENOBUFS); 2367 } 2368 2369 n->m_pkthdr.len = 0; 2370 for (nn = n; nn; nn = nn->m_next) 2371 n->m_pkthdr.len += nn->m_len; 2372 2373 n = key_fill_replymsg(n, 0); 2374 if (n == NULL) 2375 return key_senderror(so, m, ENOBUFS); 2376 2377 m_freem(m); 2378 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 2379 } 2380 } 2381 2382 /* 2383 * SADB_X_GET processing 2384 * receive 2385 * <base, policy(*)> 2386 * from the user(?), 2387 * and send, 2388 * <base, address(SD), policy> 2389 * to the ikmpd. 2390 * policy(*) including direction of policy. 2391 * 2392 * m will always be freed. 2393 */ 2394 static int 2395 key_api_spdget(struct socket *so, struct mbuf *m, 2396 const struct sadb_msghdr *mhp) 2397 { 2398 u_int32_t id; 2399 struct secpolicy *sp; 2400 struct mbuf *n; 2401 2402 if (mhp->ext[SADB_X_EXT_POLICY] == NULL || 2403 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) { 2404 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 2405 return key_senderror(so, m, EINVAL); 2406 } 2407 2408 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id; 2409 2410 /* Is there SP in SPD ? */ 2411 sp = key_getspbyid(id); 2412 if (sp == NULL) { 2413 IPSECLOG(LOG_DEBUG, "no SP found id:%u.\n", id); 2414 return key_senderror(so, m, ENOENT); 2415 } 2416 2417 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq, 2418 mhp->msg->sadb_msg_pid); 2419 KEY_SP_UNREF(&sp); /* ref gained by key_getspbyid */ 2420 if (n != NULL) { 2421 m_freem(m); 2422 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 2423 } else 2424 return key_senderror(so, m, ENOBUFS); 2425 } 2426 2427 #ifdef notyet 2428 /* 2429 * SADB_X_SPDACQUIRE processing. 2430 * Acquire policy and SA(s) for a *OUTBOUND* packet. 2431 * send 2432 * <base, policy(*)> 2433 * to KMD, and expect to receive 2434 * <base> with SADB_X_SPDACQUIRE if error occurred, 2435 * or 2436 * <base, policy> 2437 * with SADB_X_SPDUPDATE from KMD by PF_KEY. 2438 * policy(*) is without policy requests. 2439 * 2440 * 0 : succeed 2441 * others: error number 2442 */ 2443 int 2444 key_spdacquire(const struct secpolicy *sp) 2445 { 2446 struct mbuf *result = NULL, *m; 2447 struct secspacq *newspacq; 2448 int error; 2449 2450 KASSERT(sp != NULL); 2451 KASSERTMSG(sp->req == NULL, "called but there is request"); 2452 KASSERTMSG(sp->policy == IPSEC_POLICY_IPSEC, 2453 "policy mismathed. IPsec is expected"); 2454 2455 /* Get an entry to check whether sent message or not. */ 2456 newspacq = key_getspacq(&sp->spidx); 2457 if (newspacq != NULL) { 2458 if (key_blockacq_count < newspacq->count) { 2459 /* reset counter and do send message. */ 2460 newspacq->count = 0; 2461 } else { 2462 /* increment counter and do nothing. */ 2463 newspacq->count++; 2464 return 0; 2465 } 2466 } else { 2467 /* make new entry for blocking to send SADB_ACQUIRE. */ 2468 newspacq = key_newspacq(&sp->spidx); 2469 if (newspacq == NULL) 2470 return ENOBUFS; 2471 2472 /* add to key_misc.acqlist */ 2473 LIST_INSERT_HEAD(&key_misc.spacqlist, newspacq, chain); 2474 } 2475 2476 /* create new sadb_msg to reply. */ 2477 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0); 2478 if (!m) { 2479 error = ENOBUFS; 2480 goto fail; 2481 } 2482 result = m; 2483 2484 result->m_pkthdr.len = 0; 2485 for (m = result; m; m = m->m_next) 2486 result->m_pkthdr.len += m->m_len; 2487 2488 mtod(result, struct sadb_msg *)->sadb_msg_len = 2489 PFKEY_UNIT64(result->m_pkthdr.len); 2490 2491 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED); 2492 2493 fail: 2494 if (result) 2495 m_freem(result); 2496 return error; 2497 } 2498 #endif /* notyet */ 2499 2500 /* 2501 * SADB_SPDFLUSH processing 2502 * receive 2503 * <base> 2504 * from the user, and free all entries in secpctree. 2505 * and send, 2506 * <base> 2507 * to the user. 2508 * NOTE: what to do is only marking SADB_SASTATE_DEAD. 2509 * 2510 * m will always be freed. 2511 */ 2512 static int 2513 key_api_spdflush(struct socket *so, struct mbuf *m, 2514 const struct sadb_msghdr *mhp) 2515 { 2516 struct sadb_msg *newmsg; 2517 struct secpolicy *sp; 2518 u_int dir; 2519 2520 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg))) 2521 return key_senderror(so, m, EINVAL); 2522 2523 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2524 retry: 2525 mutex_enter(&key_spd.lock); 2526 SPLIST_WRITER_FOREACH(sp, dir) { 2527 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 2528 key_unlink_sp(sp); 2529 mutex_exit(&key_spd.lock); 2530 key_destroy_sp(sp); 2531 goto retry; 2532 } 2533 mutex_exit(&key_spd.lock); 2534 } 2535 2536 /* We're deleting policy; no need to invalidate the ipflow cache. */ 2537 2538 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 2539 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 2540 return key_senderror(so, m, ENOBUFS); 2541 } 2542 2543 if (m->m_next) 2544 m_freem(m->m_next); 2545 m->m_next = NULL; 2546 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 2547 newmsg = mtod(m, struct sadb_msg *); 2548 newmsg->sadb_msg_errno = 0; 2549 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 2550 2551 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 2552 } 2553 2554 static struct sockaddr key_src = { 2555 .sa_len = 2, 2556 .sa_family = PF_KEY, 2557 }; 2558 2559 static struct mbuf * 2560 key_setspddump_chain(int *errorp, int *lenp, pid_t pid) 2561 { 2562 struct secpolicy *sp; 2563 int cnt; 2564 u_int dir; 2565 struct mbuf *m, *n, *prev; 2566 int totlen; 2567 2568 KASSERT(mutex_owned(&key_spd.lock)); 2569 2570 *lenp = 0; 2571 2572 /* search SPD entry and get buffer size. */ 2573 cnt = 0; 2574 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2575 SPLIST_WRITER_FOREACH(sp, dir) { 2576 cnt++; 2577 } 2578 } 2579 2580 if (cnt == 0) { 2581 *errorp = ENOENT; 2582 return (NULL); 2583 } 2584 2585 m = NULL; 2586 prev = m; 2587 totlen = 0; 2588 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 2589 SPLIST_WRITER_FOREACH(sp, dir) { 2590 --cnt; 2591 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 2592 2593 if (!n) { 2594 *errorp = ENOBUFS; 2595 if (m) 2596 m_freem(m); 2597 return (NULL); 2598 } 2599 2600 totlen += n->m_pkthdr.len; 2601 if (!m) { 2602 m = n; 2603 } else { 2604 prev->m_nextpkt = n; 2605 } 2606 prev = n; 2607 } 2608 } 2609 2610 *lenp = totlen; 2611 *errorp = 0; 2612 return (m); 2613 } 2614 2615 /* 2616 * SADB_SPDDUMP processing 2617 * receive 2618 * <base> 2619 * from the user, and dump all SP leaves 2620 * and send, 2621 * <base> ..... 2622 * to the ikmpd. 2623 * 2624 * m will always be freed. 2625 */ 2626 static int 2627 key_api_spddump(struct socket *so, struct mbuf *m0, 2628 const struct sadb_msghdr *mhp) 2629 { 2630 struct mbuf *n; 2631 int error, len; 2632 int ok; 2633 pid_t pid; 2634 2635 pid = mhp->msg->sadb_msg_pid; 2636 /* 2637 * If the requestor has insufficient socket-buffer space 2638 * for the entire chain, nobody gets any response to the DUMP. 2639 * XXX For now, only the requestor ever gets anything. 2640 * Moreover, if the requestor has any space at all, they receive 2641 * the entire chain, otherwise the request is refused with ENOBUFS. 2642 */ 2643 if (sbspace(&so->so_rcv) <= 0) { 2644 return key_senderror(so, m0, ENOBUFS); 2645 } 2646 2647 mutex_enter(&key_spd.lock); 2648 n = key_setspddump_chain(&error, &len, pid); 2649 mutex_exit(&key_spd.lock); 2650 2651 if (n == NULL) { 2652 return key_senderror(so, m0, ENOENT); 2653 } 2654 { 2655 uint64_t *ps = PFKEY_STAT_GETREF(); 2656 ps[PFKEY_STAT_IN_TOTAL]++; 2657 ps[PFKEY_STAT_IN_BYTES] += len; 2658 PFKEY_STAT_PUTREF(); 2659 } 2660 2661 /* 2662 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 2663 * The requestor receives either the entire chain, or an 2664 * error message with ENOBUFS. 2665 */ 2666 2667 /* 2668 * sbappendchainwith record takes the chain of entries, one 2669 * packet-record per SPD entry, prepends the key_src sockaddr 2670 * to each packet-record, links the sockaddr mbufs into a new 2671 * list of records, then appends the entire resulting 2672 * list to the requesting socket. 2673 */ 2674 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 2675 SB_PRIO_ONESHOT_OVERFLOW); 2676 2677 if (!ok) { 2678 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 2679 m_freem(n); 2680 return key_senderror(so, m0, ENOBUFS); 2681 } 2682 2683 m_freem(m0); 2684 return error; 2685 } 2686 2687 /* 2688 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23 2689 */ 2690 static int 2691 key_api_nat_map(struct socket *so, struct mbuf *m, 2692 const struct sadb_msghdr *mhp) 2693 { 2694 struct sadb_x_nat_t_type *type; 2695 struct sadb_x_nat_t_port *sport; 2696 struct sadb_x_nat_t_port *dport; 2697 struct sadb_address *iaddr, *raddr; 2698 struct sadb_x_nat_t_frag *frag; 2699 2700 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 2701 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 2702 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) { 2703 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2704 return key_senderror(so, m, EINVAL); 2705 } 2706 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 2707 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 2708 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 2709 IPSECLOG(LOG_DEBUG, "invalid message.\n"); 2710 return key_senderror(so, m, EINVAL); 2711 } 2712 2713 if ((mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) && 2714 (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr))) { 2715 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2716 return key_senderror(so, m, EINVAL); 2717 } 2718 2719 if ((mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) && 2720 (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr))) { 2721 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2722 return key_senderror(so, m, EINVAL); 2723 } 2724 2725 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) && 2726 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) { 2727 IPSECLOG(LOG_DEBUG, "invalid message\n"); 2728 return key_senderror(so, m, EINVAL); 2729 } 2730 2731 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 2732 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 2733 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 2734 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 2735 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 2736 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 2737 2738 /* 2739 * XXX handle that, it should also contain a SA, or anything 2740 * that enable to update the SA information. 2741 */ 2742 2743 return 0; 2744 } 2745 2746 static struct mbuf * 2747 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid) 2748 { 2749 struct mbuf *result = NULL, *m; 2750 2751 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, 2752 key_sp_refcnt(sp)); 2753 if (!m) 2754 goto fail; 2755 result = m; 2756 2757 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 2758 &sp->spidx.src.sa, sp->spidx.prefs, sp->spidx.ul_proto); 2759 if (!m) 2760 goto fail; 2761 m_cat(result, m); 2762 2763 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 2764 &sp->spidx.dst.sa, sp->spidx.prefd, sp->spidx.ul_proto); 2765 if (!m) 2766 goto fail; 2767 m_cat(result, m); 2768 2769 m = key_sp2msg(sp); 2770 if (!m) 2771 goto fail; 2772 m_cat(result, m); 2773 2774 if ((result->m_flags & M_PKTHDR) == 0) 2775 goto fail; 2776 2777 if (result->m_len < sizeof(struct sadb_msg)) { 2778 result = m_pullup(result, sizeof(struct sadb_msg)); 2779 if (result == NULL) 2780 goto fail; 2781 } 2782 2783 result->m_pkthdr.len = 0; 2784 for (m = result; m; m = m->m_next) 2785 result->m_pkthdr.len += m->m_len; 2786 2787 mtod(result, struct sadb_msg *)->sadb_msg_len = 2788 PFKEY_UNIT64(result->m_pkthdr.len); 2789 2790 return result; 2791 2792 fail: 2793 m_freem(result); 2794 return NULL; 2795 } 2796 2797 /* 2798 * get PFKEY message length for security policy and request. 2799 */ 2800 static u_int 2801 key_getspreqmsglen(const struct secpolicy *sp) 2802 { 2803 u_int tlen; 2804 2805 tlen = sizeof(struct sadb_x_policy); 2806 2807 /* if is the policy for ipsec ? */ 2808 if (sp->policy != IPSEC_POLICY_IPSEC) 2809 return tlen; 2810 2811 /* get length of ipsec requests */ 2812 { 2813 const struct ipsecrequest *isr; 2814 int len; 2815 2816 for (isr = sp->req; isr != NULL; isr = isr->next) { 2817 len = sizeof(struct sadb_x_ipsecrequest) 2818 + isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len; 2819 2820 tlen += PFKEY_ALIGN8(len); 2821 } 2822 } 2823 2824 return tlen; 2825 } 2826 2827 /* 2828 * SADB_SPDEXPIRE processing 2829 * send 2830 * <base, address(SD), lifetime(CH), policy> 2831 * to KMD by PF_KEY. 2832 * 2833 * OUT: 0 : succeed 2834 * others : error number 2835 */ 2836 static int 2837 key_spdexpire(struct secpolicy *sp) 2838 { 2839 int s; 2840 struct mbuf *result = NULL, *m; 2841 int len; 2842 int error = -1; 2843 struct sadb_lifetime *lt; 2844 2845 /* XXX: Why do we lock ? */ 2846 s = splsoftnet(); /*called from softclock()*/ 2847 2848 KASSERT(sp != NULL); 2849 2850 /* set msg header */ 2851 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0); 2852 if (!m) { 2853 error = ENOBUFS; 2854 goto fail; 2855 } 2856 result = m; 2857 2858 /* create lifetime extension (current and hard) */ 2859 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 2860 m = key_alloc_mbuf(len); 2861 if (!m || m->m_next) { /*XXX*/ 2862 if (m) 2863 m_freem(m); 2864 error = ENOBUFS; 2865 goto fail; 2866 } 2867 memset(mtod(m, void *), 0, len); 2868 lt = mtod(m, struct sadb_lifetime *); 2869 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2870 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 2871 lt->sadb_lifetime_allocations = 0; 2872 lt->sadb_lifetime_bytes = 0; 2873 lt->sadb_lifetime_addtime = time_mono_to_wall(sp->created); 2874 lt->sadb_lifetime_usetime = time_mono_to_wall(sp->lastused); 2875 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 2876 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 2877 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD; 2878 lt->sadb_lifetime_allocations = 0; 2879 lt->sadb_lifetime_bytes = 0; 2880 lt->sadb_lifetime_addtime = sp->lifetime; 2881 lt->sadb_lifetime_usetime = sp->validtime; 2882 m_cat(result, m); 2883 2884 /* set sadb_address for source */ 2885 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sp->spidx.src.sa, 2886 sp->spidx.prefs, sp->spidx.ul_proto); 2887 if (!m) { 2888 error = ENOBUFS; 2889 goto fail; 2890 } 2891 m_cat(result, m); 2892 2893 /* set sadb_address for destination */ 2894 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sp->spidx.dst.sa, 2895 sp->spidx.prefd, sp->spidx.ul_proto); 2896 if (!m) { 2897 error = ENOBUFS; 2898 goto fail; 2899 } 2900 m_cat(result, m); 2901 2902 /* set secpolicy */ 2903 m = key_sp2msg(sp); 2904 if (!m) { 2905 error = ENOBUFS; 2906 goto fail; 2907 } 2908 m_cat(result, m); 2909 2910 if ((result->m_flags & M_PKTHDR) == 0) { 2911 error = EINVAL; 2912 goto fail; 2913 } 2914 2915 if (result->m_len < sizeof(struct sadb_msg)) { 2916 result = m_pullup(result, sizeof(struct sadb_msg)); 2917 if (result == NULL) { 2918 error = ENOBUFS; 2919 goto fail; 2920 } 2921 } 2922 2923 result->m_pkthdr.len = 0; 2924 for (m = result; m; m = m->m_next) 2925 result->m_pkthdr.len += m->m_len; 2926 2927 mtod(result, struct sadb_msg *)->sadb_msg_len = 2928 PFKEY_UNIT64(result->m_pkthdr.len); 2929 2930 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 2931 2932 fail: 2933 if (result) 2934 m_freem(result); 2935 splx(s); 2936 return error; 2937 } 2938 2939 /* %%% SAD management */ 2940 /* 2941 * allocating a memory for new SA head, and copy from the values of mhp. 2942 * OUT: NULL : failure due to the lack of memory. 2943 * others : pointer to new SA head. 2944 */ 2945 static struct secashead * 2946 key_newsah(const struct secasindex *saidx) 2947 { 2948 struct secashead *newsah; 2949 int i; 2950 2951 KASSERT(saidx != NULL); 2952 2953 newsah = kmem_zalloc(sizeof(struct secashead), KM_SLEEP); 2954 for (i = 0; i < __arraycount(newsah->savlist); i++) 2955 PSLIST_INIT(&newsah->savlist[i]); 2956 newsah->saidx = *saidx; 2957 2958 /* add to saidxtree */ 2959 newsah->state = SADB_SASTATE_MATURE; 2960 SAHLIST_ENTRY_INIT(newsah); 2961 mutex_enter(&key_sad.lock); 2962 SAHLIST_WRITER_INSERT_HEAD(newsah); 2963 mutex_exit(&key_sad.lock); 2964 2965 return newsah; 2966 } 2967 2968 /* 2969 * delete SA index and all SA registerd. 2970 */ 2971 static void 2972 key_delsah(struct secashead *sah) 2973 { 2974 struct secasvar *sav; 2975 u_int state; 2976 int s; 2977 int zombie = 0; 2978 2979 KASSERT(!cpu_softintr_p()); 2980 KASSERT(sah != NULL); 2981 2982 s = splsoftnet(); 2983 2984 /* searching all SA registerd in the secindex. */ 2985 SASTATE_ANY_FOREACH(state) { 2986 SAVLIST_READER_FOREACH(sav, sah, state) { 2987 /* give up to delete this sa */ 2988 zombie++; 2989 } 2990 } 2991 2992 /* don't delete sah only if there are savs. */ 2993 if (zombie) { 2994 splx(s); 2995 return; 2996 } 2997 2998 rtcache_free(&sah->sa_route); 2999 3000 /* remove from tree of SA index */ 3001 SAHLIST_WRITER_REMOVE(sah); 3002 3003 if (sah->idents != NULL) 3004 kmem_free(sah->idents, sah->idents_len); 3005 if (sah->identd != NULL) 3006 kmem_free(sah->identd, sah->identd_len); 3007 3008 SAHLIST_ENTRY_DESTROY(sah); 3009 kmem_free(sah, sizeof(*sah)); 3010 3011 splx(s); 3012 return; 3013 } 3014 3015 /* 3016 * allocating a new SA with LARVAL state. 3017 * key_api_add() and key_api_getspi() call, 3018 * and copy the values of mhp into new buffer. 3019 * When SAD message type is GETSPI: 3020 * to set sequence number from acq_seq++, 3021 * to set zero to SPI. 3022 * not to call key_setsava(). 3023 * OUT: NULL : fail 3024 * others : pointer to new secasvar. 3025 * 3026 * does not modify mbuf. does not free mbuf on error. 3027 */ 3028 static struct secasvar * 3029 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, 3030 int *errp, const char* where, int tag) 3031 { 3032 struct secasvar *newsav; 3033 const struct sadb_sa *xsa; 3034 3035 KASSERT(!cpu_softintr_p()); 3036 KASSERT(m != NULL); 3037 KASSERT(mhp != NULL); 3038 KASSERT(mhp->msg != NULL); 3039 3040 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 3041 3042 switch (mhp->msg->sadb_msg_type) { 3043 case SADB_GETSPI: 3044 newsav->spi = 0; 3045 3046 #ifdef IPSEC_DOSEQCHECK 3047 /* sync sequence number */ 3048 if (mhp->msg->sadb_msg_seq == 0) 3049 newsav->seq = 3050 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 3051 else 3052 #endif 3053 newsav->seq = mhp->msg->sadb_msg_seq; 3054 break; 3055 3056 case SADB_ADD: 3057 /* sanity check */ 3058 if (mhp->ext[SADB_EXT_SA] == NULL) { 3059 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 3060 *errp = EINVAL; 3061 goto error; 3062 } 3063 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3064 newsav->spi = xsa->sadb_sa_spi; 3065 newsav->seq = mhp->msg->sadb_msg_seq; 3066 break; 3067 default: 3068 *errp = EINVAL; 3069 goto error; 3070 } 3071 3072 /* copy sav values */ 3073 if (mhp->msg->sadb_msg_type != SADB_GETSPI) { 3074 *errp = key_setsaval(newsav, m, mhp); 3075 if (*errp) 3076 goto error; 3077 } else { 3078 /* We don't allow lft_c to be NULL */ 3079 newsav->lft_c = kmem_zalloc(sizeof(struct sadb_lifetime), 3080 KM_SLEEP); 3081 } 3082 3083 /* reset created */ 3084 newsav->created = time_uptime; 3085 newsav->pid = mhp->msg->sadb_msg_pid; 3086 3087 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3088 "DP from %s:%u return SA:%p\n", where, tag, newsav); 3089 return newsav; 3090 3091 error: 3092 KASSERT(*errp != 0); 3093 kmem_free(newsav, sizeof(*newsav)); 3094 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 3095 "DP from %s:%u return SA:NULL\n", where, tag); 3096 return NULL; 3097 } 3098 3099 3100 static void 3101 key_clear_xform(struct secasvar *sav) 3102 { 3103 3104 /* 3105 * Cleanup xform state. Note that zeroize'ing causes the 3106 * keys to be cleared; otherwise we must do it ourself. 3107 */ 3108 if (sav->tdb_xform != NULL) { 3109 sav->tdb_xform->xf_zeroize(sav); 3110 sav->tdb_xform = NULL; 3111 } else { 3112 if (sav->key_auth != NULL) 3113 explicit_memset(_KEYBUF(sav->key_auth), 0, 3114 _KEYLEN(sav->key_auth)); 3115 if (sav->key_enc != NULL) 3116 explicit_memset(_KEYBUF(sav->key_enc), 0, 3117 _KEYLEN(sav->key_enc)); 3118 } 3119 } 3120 3121 /* 3122 * free() SA variable entry. 3123 */ 3124 static void 3125 key_delsav(struct secasvar *sav) 3126 { 3127 3128 KASSERT(sav != NULL); 3129 KASSERTMSG(sav->refcnt == 0, "reference count %u > 0", sav->refcnt); 3130 3131 key_clear_xform(sav); 3132 key_freesaval(sav); 3133 SAVLIST_ENTRY_DESTROY(sav); 3134 kmem_intr_free(sav, sizeof(*sav)); 3135 3136 return; 3137 } 3138 3139 /* 3140 * search SAD. 3141 * OUT: 3142 * NULL : not found 3143 * others : found, pointer to a SA. 3144 */ 3145 static struct secashead * 3146 key_getsah(const struct secasindex *saidx, int flag) 3147 { 3148 struct secashead *sah; 3149 3150 SAHLIST_READER_FOREACH(sah) { 3151 if (sah->state == SADB_SASTATE_DEAD) 3152 continue; 3153 if (key_saidx_match(&sah->saidx, saidx, flag)) 3154 return sah; 3155 } 3156 3157 return NULL; 3158 } 3159 3160 /* 3161 * check not to be duplicated SPI. 3162 * NOTE: this function is too slow due to searching all SAD. 3163 * OUT: 3164 * NULL : not found 3165 * others : found, pointer to a SA. 3166 */ 3167 static bool 3168 key_checkspidup(const struct secasindex *saidx, u_int32_t spi) 3169 { 3170 struct secashead *sah; 3171 struct secasvar *sav; 3172 3173 /* check address family */ 3174 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) { 3175 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 3176 return false; 3177 } 3178 3179 /* check all SAD */ 3180 SAHLIST_READER_FOREACH(sah) { 3181 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst)) 3182 continue; 3183 sav = key_getsavbyspi(sah, spi); 3184 if (sav != NULL) { 3185 KEY_SA_UNREF(&sav); 3186 return true; 3187 } 3188 } 3189 3190 return false; 3191 } 3192 3193 /* 3194 * search SAD litmited alive SA, protocol, SPI. 3195 * OUT: 3196 * NULL : not found 3197 * others : found, pointer to a SA. 3198 */ 3199 static struct secasvar * 3200 key_getsavbyspi(struct secashead *sah, u_int32_t spi) 3201 { 3202 struct secasvar *sav = NULL; 3203 u_int state; 3204 int s; 3205 3206 /* search all status */ 3207 s = pserialize_read_enter(); 3208 SASTATE_ALIVE_FOREACH(state) { 3209 SAVLIST_READER_FOREACH(sav, sah, state) { 3210 /* sanity check */ 3211 if (sav->state != state) { 3212 IPSECLOG(LOG_DEBUG, 3213 "invalid sav->state (queue: %d SA: %d)\n", 3214 state, sav->state); 3215 continue; 3216 } 3217 3218 if (sav->spi == spi) { 3219 SA_ADDREF(sav); 3220 goto out; 3221 } 3222 } 3223 } 3224 out: 3225 pserialize_read_exit(s); 3226 3227 return sav; 3228 } 3229 3230 /* 3231 * Free allocated data to member variables of sav: 3232 * sav->replay, sav->key_* and sav->lft_*. 3233 */ 3234 static void 3235 key_freesaval(struct secasvar *sav) 3236 { 3237 3238 KASSERT(sav->refcnt == 0); 3239 3240 if (sav->replay != NULL) 3241 kmem_intr_free(sav->replay, sav->replay_len); 3242 if (sav->key_auth != NULL) 3243 kmem_intr_free(sav->key_auth, sav->key_auth_len); 3244 if (sav->key_enc != NULL) 3245 kmem_intr_free(sav->key_enc, sav->key_enc_len); 3246 if (sav->lft_c != NULL) 3247 kmem_intr_free(sav->lft_c, sizeof(*(sav->lft_c))); 3248 if (sav->lft_h != NULL) 3249 kmem_intr_free(sav->lft_h, sizeof(*(sav->lft_h))); 3250 if (sav->lft_s != NULL) 3251 kmem_intr_free(sav->lft_s, sizeof(*(sav->lft_s))); 3252 } 3253 3254 /* 3255 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*. 3256 * You must update these if need. 3257 * OUT: 0: success. 3258 * !0: failure. 3259 * 3260 * does not modify mbuf. does not free mbuf on error. 3261 */ 3262 static int 3263 key_setsaval(struct secasvar *sav, struct mbuf *m, 3264 const struct sadb_msghdr *mhp) 3265 { 3266 int error = 0; 3267 3268 KASSERT(!cpu_softintr_p()); 3269 KASSERT(m != NULL); 3270 KASSERT(mhp != NULL); 3271 KASSERT(mhp->msg != NULL); 3272 3273 /* We shouldn't initialize sav variables while someone uses it. */ 3274 KASSERT(sav->refcnt == 0); 3275 3276 /* SA */ 3277 if (mhp->ext[SADB_EXT_SA] != NULL) { 3278 const struct sadb_sa *sa0; 3279 3280 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 3281 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) { 3282 error = EINVAL; 3283 goto fail; 3284 } 3285 3286 sav->alg_auth = sa0->sadb_sa_auth; 3287 sav->alg_enc = sa0->sadb_sa_encrypt; 3288 sav->flags = sa0->sadb_sa_flags; 3289 3290 /* replay window */ 3291 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) { 3292 size_t len = sizeof(struct secreplay) + 3293 sa0->sadb_sa_replay; 3294 sav->replay = kmem_zalloc(len, KM_SLEEP); 3295 sav->replay_len = len; 3296 if (sa0->sadb_sa_replay != 0) 3297 sav->replay->bitmap = (char*)(sav->replay+1); 3298 sav->replay->wsize = sa0->sadb_sa_replay; 3299 } 3300 } 3301 3302 /* Authentication keys */ 3303 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) { 3304 const struct sadb_key *key0; 3305 int len; 3306 3307 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH]; 3308 len = mhp->extlen[SADB_EXT_KEY_AUTH]; 3309 3310 error = 0; 3311 if (len < sizeof(*key0)) { 3312 error = EINVAL; 3313 goto fail; 3314 } 3315 switch (mhp->msg->sadb_msg_satype) { 3316 case SADB_SATYPE_AH: 3317 case SADB_SATYPE_ESP: 3318 case SADB_X_SATYPE_TCPSIGNATURE: 3319 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3320 sav->alg_auth != SADB_X_AALG_NULL) 3321 error = EINVAL; 3322 break; 3323 case SADB_X_SATYPE_IPCOMP: 3324 default: 3325 error = EINVAL; 3326 break; 3327 } 3328 if (error) { 3329 IPSECLOG(LOG_DEBUG, "invalid key_auth values.\n"); 3330 goto fail; 3331 } 3332 3333 sav->key_auth = key_newbuf(key0, len); 3334 sav->key_auth_len = len; 3335 } 3336 3337 /* Encryption key */ 3338 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) { 3339 const struct sadb_key *key0; 3340 int len; 3341 3342 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT]; 3343 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT]; 3344 3345 error = 0; 3346 if (len < sizeof(*key0)) { 3347 error = EINVAL; 3348 goto fail; 3349 } 3350 switch (mhp->msg->sadb_msg_satype) { 3351 case SADB_SATYPE_ESP: 3352 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) && 3353 sav->alg_enc != SADB_EALG_NULL) { 3354 error = EINVAL; 3355 break; 3356 } 3357 sav->key_enc = key_newbuf(key0, len); 3358 sav->key_enc_len = len; 3359 break; 3360 case SADB_X_SATYPE_IPCOMP: 3361 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key))) 3362 error = EINVAL; 3363 sav->key_enc = NULL; /*just in case*/ 3364 break; 3365 case SADB_SATYPE_AH: 3366 case SADB_X_SATYPE_TCPSIGNATURE: 3367 default: 3368 error = EINVAL; 3369 break; 3370 } 3371 if (error) { 3372 IPSECLOG(LOG_DEBUG, "invalid key_enc value.\n"); 3373 goto fail; 3374 } 3375 } 3376 3377 /* set iv */ 3378 sav->ivlen = 0; 3379 3380 switch (mhp->msg->sadb_msg_satype) { 3381 case SADB_SATYPE_AH: 3382 error = xform_init(sav, XF_AH); 3383 break; 3384 case SADB_SATYPE_ESP: 3385 error = xform_init(sav, XF_ESP); 3386 break; 3387 case SADB_X_SATYPE_IPCOMP: 3388 error = xform_init(sav, XF_IPCOMP); 3389 break; 3390 case SADB_X_SATYPE_TCPSIGNATURE: 3391 error = xform_init(sav, XF_TCPSIGNATURE); 3392 break; 3393 } 3394 if (error) { 3395 IPSECLOG(LOG_DEBUG, "unable to initialize SA type %u.\n", 3396 mhp->msg->sadb_msg_satype); 3397 goto fail; 3398 } 3399 3400 /* reset created */ 3401 sav->created = time_uptime; 3402 3403 /* make lifetime for CURRENT */ 3404 sav->lft_c = kmem_alloc(sizeof(struct sadb_lifetime), KM_SLEEP); 3405 3406 sav->lft_c->sadb_lifetime_len = 3407 PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 3408 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 3409 sav->lft_c->sadb_lifetime_allocations = 0; 3410 sav->lft_c->sadb_lifetime_bytes = 0; 3411 sav->lft_c->sadb_lifetime_addtime = time_uptime; 3412 sav->lft_c->sadb_lifetime_usetime = 0; 3413 3414 /* lifetimes for HARD and SOFT */ 3415 { 3416 const struct sadb_lifetime *lft0; 3417 3418 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD]; 3419 if (lft0 != NULL) { 3420 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) { 3421 error = EINVAL; 3422 goto fail; 3423 } 3424 sav->lft_h = key_newbuf(lft0, sizeof(*lft0)); 3425 } 3426 3427 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT]; 3428 if (lft0 != NULL) { 3429 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) { 3430 error = EINVAL; 3431 goto fail; 3432 } 3433 sav->lft_s = key_newbuf(lft0, sizeof(*lft0)); 3434 /* to be initialize ? */ 3435 } 3436 } 3437 3438 return 0; 3439 3440 fail: 3441 key_clear_xform(sav); 3442 key_freesaval(sav); 3443 3444 return error; 3445 } 3446 3447 /* 3448 * validation with a secasvar entry, and set SADB_SATYPE_MATURE. 3449 * OUT: 0: valid 3450 * other: errno 3451 */ 3452 static int 3453 key_init_xform(struct secasvar *sav) 3454 { 3455 int error; 3456 3457 /* We shouldn't initialize sav variables while someone uses it. */ 3458 KASSERT(sav->refcnt == 0); 3459 3460 /* check SPI value */ 3461 switch (sav->sah->saidx.proto) { 3462 case IPPROTO_ESP: 3463 case IPPROTO_AH: 3464 if (ntohl(sav->spi) <= 255) { 3465 IPSECLOG(LOG_DEBUG, "illegal range of SPI %u.\n", 3466 (u_int32_t)ntohl(sav->spi)); 3467 return EINVAL; 3468 } 3469 break; 3470 } 3471 3472 /* check satype */ 3473 switch (sav->sah->saidx.proto) { 3474 case IPPROTO_ESP: 3475 /* check flags */ 3476 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) == 3477 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) { 3478 IPSECLOG(LOG_DEBUG, 3479 "invalid flag (derived) given to old-esp.\n"); 3480 return EINVAL; 3481 } 3482 error = xform_init(sav, XF_ESP); 3483 break; 3484 case IPPROTO_AH: 3485 /* check flags */ 3486 if (sav->flags & SADB_X_EXT_DERIV) { 3487 IPSECLOG(LOG_DEBUG, 3488 "invalid flag (derived) given to AH SA.\n"); 3489 return EINVAL; 3490 } 3491 if (sav->alg_enc != SADB_EALG_NONE) { 3492 IPSECLOG(LOG_DEBUG, 3493 "protocol and algorithm mismated.\n"); 3494 return(EINVAL); 3495 } 3496 error = xform_init(sav, XF_AH); 3497 break; 3498 case IPPROTO_IPCOMP: 3499 if (sav->alg_auth != SADB_AALG_NONE) { 3500 IPSECLOG(LOG_DEBUG, 3501 "protocol and algorithm mismated.\n"); 3502 return(EINVAL); 3503 } 3504 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 3505 && ntohl(sav->spi) >= 0x10000) { 3506 IPSECLOG(LOG_DEBUG, "invalid cpi for IPComp.\n"); 3507 return(EINVAL); 3508 } 3509 error = xform_init(sav, XF_IPCOMP); 3510 break; 3511 case IPPROTO_TCP: 3512 if (sav->alg_enc != SADB_EALG_NONE) { 3513 IPSECLOG(LOG_DEBUG, 3514 "protocol and algorithm mismated.\n"); 3515 return(EINVAL); 3516 } 3517 error = xform_init(sav, XF_TCPSIGNATURE); 3518 break; 3519 default: 3520 IPSECLOG(LOG_DEBUG, "Invalid satype.\n"); 3521 error = EPROTONOSUPPORT; 3522 break; 3523 } 3524 3525 return error; 3526 } 3527 3528 /* 3529 * subroutine for SADB_GET and SADB_DUMP. 3530 */ 3531 static struct mbuf * 3532 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype, 3533 u_int32_t seq, u_int32_t pid) 3534 { 3535 struct mbuf *result = NULL, *tres = NULL, *m; 3536 int l = 0; 3537 int i; 3538 void *p; 3539 struct sadb_lifetime lt; 3540 int dumporder[] = { 3541 SADB_EXT_SA, SADB_X_EXT_SA2, 3542 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 3543 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC, 3544 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH, 3545 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC, 3546 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY, 3547 SADB_X_EXT_NAT_T_TYPE, 3548 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT, 3549 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR, 3550 SADB_X_EXT_NAT_T_FRAG, 3551 3552 }; 3553 3554 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt); 3555 if (m == NULL) 3556 goto fail; 3557 result = m; 3558 3559 for (i = __arraycount(dumporder) - 1; i >= 0; i--) { 3560 m = NULL; 3561 p = NULL; 3562 switch (dumporder[i]) { 3563 case SADB_EXT_SA: 3564 m = key_setsadbsa(sav); 3565 break; 3566 3567 case SADB_X_EXT_SA2: 3568 m = key_setsadbxsa2(sav->sah->saidx.mode, 3569 sav->replay ? sav->replay->count : 0, 3570 sav->sah->saidx.reqid); 3571 break; 3572 3573 case SADB_EXT_ADDRESS_SRC: 3574 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, 3575 &sav->sah->saidx.src.sa, 3576 FULLMASK, IPSEC_ULPROTO_ANY); 3577 break; 3578 3579 case SADB_EXT_ADDRESS_DST: 3580 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, 3581 &sav->sah->saidx.dst.sa, 3582 FULLMASK, IPSEC_ULPROTO_ANY); 3583 break; 3584 3585 case SADB_EXT_KEY_AUTH: 3586 if (!sav->key_auth) 3587 continue; 3588 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len); 3589 p = sav->key_auth; 3590 break; 3591 3592 case SADB_EXT_KEY_ENCRYPT: 3593 if (!sav->key_enc) 3594 continue; 3595 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len); 3596 p = sav->key_enc; 3597 break; 3598 3599 case SADB_EXT_LIFETIME_CURRENT: 3600 KASSERT(sav->lft_c != NULL); 3601 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len); 3602 memcpy(<, sav->lft_c, sizeof(struct sadb_lifetime)); 3603 lt.sadb_lifetime_addtime = 3604 time_mono_to_wall(lt.sadb_lifetime_addtime); 3605 lt.sadb_lifetime_usetime = 3606 time_mono_to_wall(lt.sadb_lifetime_usetime); 3607 p = < 3608 break; 3609 3610 case SADB_EXT_LIFETIME_HARD: 3611 if (!sav->lft_h) 3612 continue; 3613 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len); 3614 p = sav->lft_h; 3615 break; 3616 3617 case SADB_EXT_LIFETIME_SOFT: 3618 if (!sav->lft_s) 3619 continue; 3620 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len); 3621 p = sav->lft_s; 3622 break; 3623 3624 case SADB_X_EXT_NAT_T_TYPE: 3625 m = key_setsadbxtype(sav->natt_type); 3626 break; 3627 3628 case SADB_X_EXT_NAT_T_DPORT: 3629 if (sav->natt_type == 0) 3630 continue; 3631 m = key_setsadbxport( 3632 key_portfromsaddr(&sav->sah->saidx.dst), 3633 SADB_X_EXT_NAT_T_DPORT); 3634 break; 3635 3636 case SADB_X_EXT_NAT_T_SPORT: 3637 if (sav->natt_type == 0) 3638 continue; 3639 m = key_setsadbxport( 3640 key_portfromsaddr(&sav->sah->saidx.src), 3641 SADB_X_EXT_NAT_T_SPORT); 3642 break; 3643 3644 case SADB_X_EXT_NAT_T_FRAG: 3645 /* don't send frag info if not set */ 3646 if (sav->natt_type == 0 || sav->esp_frag == IP_MAXPACKET) 3647 continue; 3648 m = key_setsadbxfrag(sav->esp_frag); 3649 break; 3650 3651 case SADB_X_EXT_NAT_T_OAI: 3652 case SADB_X_EXT_NAT_T_OAR: 3653 continue; 3654 3655 case SADB_EXT_ADDRESS_PROXY: 3656 case SADB_EXT_IDENTITY_SRC: 3657 case SADB_EXT_IDENTITY_DST: 3658 /* XXX: should we brought from SPD ? */ 3659 case SADB_EXT_SENSITIVITY: 3660 default: 3661 continue; 3662 } 3663 3664 KASSERT(!(m && p)); 3665 if (!m && !p) 3666 goto fail; 3667 if (p && tres) { 3668 M_PREPEND(tres, l, M_DONTWAIT); 3669 if (!tres) 3670 goto fail; 3671 memcpy(mtod(tres, void *), p, l); 3672 continue; 3673 } 3674 if (p) { 3675 m = key_alloc_mbuf(l); 3676 if (!m) 3677 goto fail; 3678 m_copyback(m, 0, l, p); 3679 } 3680 3681 if (tres) 3682 m_cat(m, tres); 3683 tres = m; 3684 } 3685 3686 m_cat(result, tres); 3687 tres = NULL; /* avoid free on error below */ 3688 3689 if (result->m_len < sizeof(struct sadb_msg)) { 3690 result = m_pullup(result, sizeof(struct sadb_msg)); 3691 if (result == NULL) 3692 goto fail; 3693 } 3694 3695 result->m_pkthdr.len = 0; 3696 for (m = result; m; m = m->m_next) 3697 result->m_pkthdr.len += m->m_len; 3698 3699 mtod(result, struct sadb_msg *)->sadb_msg_len = 3700 PFKEY_UNIT64(result->m_pkthdr.len); 3701 3702 return result; 3703 3704 fail: 3705 m_freem(result); 3706 m_freem(tres); 3707 return NULL; 3708 } 3709 3710 3711 /* 3712 * set a type in sadb_x_nat_t_type 3713 */ 3714 static struct mbuf * 3715 key_setsadbxtype(u_int16_t type) 3716 { 3717 struct mbuf *m; 3718 size_t len; 3719 struct sadb_x_nat_t_type *p; 3720 3721 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type)); 3722 3723 m = key_alloc_mbuf(len); 3724 if (!m || m->m_next) { /*XXX*/ 3725 if (m) 3726 m_freem(m); 3727 return NULL; 3728 } 3729 3730 p = mtod(m, struct sadb_x_nat_t_type *); 3731 3732 memset(p, 0, len); 3733 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len); 3734 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE; 3735 p->sadb_x_nat_t_type_type = type; 3736 3737 return m; 3738 } 3739 /* 3740 * set a port in sadb_x_nat_t_port. port is in network order 3741 */ 3742 static struct mbuf * 3743 key_setsadbxport(u_int16_t port, u_int16_t type) 3744 { 3745 struct mbuf *m; 3746 size_t len; 3747 struct sadb_x_nat_t_port *p; 3748 3749 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port)); 3750 3751 m = key_alloc_mbuf(len); 3752 if (!m || m->m_next) { /*XXX*/ 3753 if (m) 3754 m_freem(m); 3755 return NULL; 3756 } 3757 3758 p = mtod(m, struct sadb_x_nat_t_port *); 3759 3760 memset(p, 0, len); 3761 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len); 3762 p->sadb_x_nat_t_port_exttype = type; 3763 p->sadb_x_nat_t_port_port = port; 3764 3765 return m; 3766 } 3767 3768 /* 3769 * set fragmentation info in sadb_x_nat_t_frag 3770 */ 3771 static struct mbuf * 3772 key_setsadbxfrag(u_int16_t flen) 3773 { 3774 struct mbuf *m; 3775 size_t len; 3776 struct sadb_x_nat_t_frag *p; 3777 3778 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_frag)); 3779 3780 m = key_alloc_mbuf(len); 3781 if (!m || m->m_next) { /*XXX*/ 3782 if (m) 3783 m_freem(m); 3784 return NULL; 3785 } 3786 3787 p = mtod(m, struct sadb_x_nat_t_frag *); 3788 3789 memset(p, 0, len); 3790 p->sadb_x_nat_t_frag_len = PFKEY_UNIT64(len); 3791 p->sadb_x_nat_t_frag_exttype = SADB_X_EXT_NAT_T_FRAG; 3792 p->sadb_x_nat_t_frag_fraglen = flen; 3793 3794 return m; 3795 } 3796 3797 /* 3798 * Get port from sockaddr, port is in network order 3799 */ 3800 u_int16_t 3801 key_portfromsaddr(const union sockaddr_union *saddr) 3802 { 3803 u_int16_t port; 3804 3805 switch (saddr->sa.sa_family) { 3806 case AF_INET: { 3807 port = saddr->sin.sin_port; 3808 break; 3809 } 3810 #ifdef INET6 3811 case AF_INET6: { 3812 port = saddr->sin6.sin6_port; 3813 break; 3814 } 3815 #endif 3816 default: 3817 printf("%s: unexpected address family\n", __func__); 3818 port = 0; 3819 break; 3820 } 3821 3822 return port; 3823 } 3824 3825 3826 /* 3827 * Set port is struct sockaddr. port is in network order 3828 */ 3829 static void 3830 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port) 3831 { 3832 switch (saddr->sa.sa_family) { 3833 case AF_INET: { 3834 saddr->sin.sin_port = port; 3835 break; 3836 } 3837 #ifdef INET6 3838 case AF_INET6: { 3839 saddr->sin6.sin6_port = port; 3840 break; 3841 } 3842 #endif 3843 default: 3844 printf("%s: unexpected address family %d\n", __func__, 3845 saddr->sa.sa_family); 3846 break; 3847 } 3848 3849 return; 3850 } 3851 3852 /* 3853 * Safety check sa_len 3854 */ 3855 static int 3856 key_checksalen(const union sockaddr_union *saddr) 3857 { 3858 switch (saddr->sa.sa_family) { 3859 case AF_INET: 3860 if (saddr->sa.sa_len != sizeof(struct sockaddr_in)) 3861 return -1; 3862 break; 3863 #ifdef INET6 3864 case AF_INET6: 3865 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6)) 3866 return -1; 3867 break; 3868 #endif 3869 default: 3870 printf("%s: unexpected sa_family %d\n", __func__, 3871 saddr->sa.sa_family); 3872 return -1; 3873 break; 3874 } 3875 return 0; 3876 } 3877 3878 3879 /* 3880 * set data into sadb_msg. 3881 */ 3882 static struct mbuf * 3883 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, 3884 u_int32_t seq, pid_t pid, u_int16_t reserved) 3885 { 3886 struct mbuf *m; 3887 struct sadb_msg *p; 3888 int len; 3889 3890 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= MCLBYTES); 3891 3892 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)); 3893 3894 MGETHDR(m, M_DONTWAIT, MT_DATA); 3895 if (m && len > MHLEN) { 3896 MCLGET(m, M_DONTWAIT); 3897 if ((m->m_flags & M_EXT) == 0) { 3898 m_freem(m); 3899 m = NULL; 3900 } 3901 } 3902 if (!m) 3903 return NULL; 3904 m->m_pkthdr.len = m->m_len = len; 3905 m->m_next = NULL; 3906 3907 p = mtod(m, struct sadb_msg *); 3908 3909 memset(p, 0, len); 3910 p->sadb_msg_version = PF_KEY_V2; 3911 p->sadb_msg_type = type; 3912 p->sadb_msg_errno = 0; 3913 p->sadb_msg_satype = satype; 3914 p->sadb_msg_len = PFKEY_UNIT64(tlen); 3915 p->sadb_msg_reserved = reserved; 3916 p->sadb_msg_seq = seq; 3917 p->sadb_msg_pid = (u_int32_t)pid; 3918 3919 return m; 3920 } 3921 3922 /* 3923 * copy secasvar data into sadb_address. 3924 */ 3925 static struct mbuf * 3926 key_setsadbsa(struct secasvar *sav) 3927 { 3928 struct mbuf *m; 3929 struct sadb_sa *p; 3930 int len; 3931 3932 len = PFKEY_ALIGN8(sizeof(struct sadb_sa)); 3933 m = key_alloc_mbuf(len); 3934 if (!m || m->m_next) { /*XXX*/ 3935 if (m) 3936 m_freem(m); 3937 return NULL; 3938 } 3939 3940 p = mtod(m, struct sadb_sa *); 3941 3942 memset(p, 0, len); 3943 p->sadb_sa_len = PFKEY_UNIT64(len); 3944 p->sadb_sa_exttype = SADB_EXT_SA; 3945 p->sadb_sa_spi = sav->spi; 3946 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0); 3947 p->sadb_sa_state = sav->state; 3948 p->sadb_sa_auth = sav->alg_auth; 3949 p->sadb_sa_encrypt = sav->alg_enc; 3950 p->sadb_sa_flags = sav->flags; 3951 3952 return m; 3953 } 3954 3955 /* 3956 * set data into sadb_address. 3957 */ 3958 static struct mbuf * 3959 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, 3960 u_int8_t prefixlen, u_int16_t ul_proto) 3961 { 3962 struct mbuf *m; 3963 struct sadb_address *p; 3964 size_t len; 3965 3966 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) + 3967 PFKEY_ALIGN8(saddr->sa_len); 3968 m = key_alloc_mbuf(len); 3969 if (!m || m->m_next) { /*XXX*/ 3970 if (m) 3971 m_freem(m); 3972 return NULL; 3973 } 3974 3975 p = mtod(m, struct sadb_address *); 3976 3977 memset(p, 0, len); 3978 p->sadb_address_len = PFKEY_UNIT64(len); 3979 p->sadb_address_exttype = exttype; 3980 p->sadb_address_proto = ul_proto; 3981 if (prefixlen == FULLMASK) { 3982 switch (saddr->sa_family) { 3983 case AF_INET: 3984 prefixlen = sizeof(struct in_addr) << 3; 3985 break; 3986 case AF_INET6: 3987 prefixlen = sizeof(struct in6_addr) << 3; 3988 break; 3989 default: 3990 ; /*XXX*/ 3991 } 3992 } 3993 p->sadb_address_prefixlen = prefixlen; 3994 p->sadb_address_reserved = 0; 3995 3996 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)), 3997 saddr, saddr->sa_len); 3998 3999 return m; 4000 } 4001 4002 #if 0 4003 /* 4004 * set data into sadb_ident. 4005 */ 4006 static struct mbuf * 4007 key_setsadbident(u_int16_t exttype, u_int16_t idtype, 4008 void *string, int stringlen, u_int64_t id) 4009 { 4010 struct mbuf *m; 4011 struct sadb_ident *p; 4012 size_t len; 4013 4014 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen); 4015 m = key_alloc_mbuf(len); 4016 if (!m || m->m_next) { /*XXX*/ 4017 if (m) 4018 m_freem(m); 4019 return NULL; 4020 } 4021 4022 p = mtod(m, struct sadb_ident *); 4023 4024 memset(p, 0, len); 4025 p->sadb_ident_len = PFKEY_UNIT64(len); 4026 p->sadb_ident_exttype = exttype; 4027 p->sadb_ident_type = idtype; 4028 p->sadb_ident_reserved = 0; 4029 p->sadb_ident_id = id; 4030 4031 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)), 4032 string, stringlen); 4033 4034 return m; 4035 } 4036 #endif 4037 4038 /* 4039 * set data into sadb_x_sa2. 4040 */ 4041 static struct mbuf * 4042 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid) 4043 { 4044 struct mbuf *m; 4045 struct sadb_x_sa2 *p; 4046 size_t len; 4047 4048 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2)); 4049 m = key_alloc_mbuf(len); 4050 if (!m || m->m_next) { /*XXX*/ 4051 if (m) 4052 m_freem(m); 4053 return NULL; 4054 } 4055 4056 p = mtod(m, struct sadb_x_sa2 *); 4057 4058 memset(p, 0, len); 4059 p->sadb_x_sa2_len = PFKEY_UNIT64(len); 4060 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; 4061 p->sadb_x_sa2_mode = mode; 4062 p->sadb_x_sa2_reserved1 = 0; 4063 p->sadb_x_sa2_reserved2 = 0; 4064 p->sadb_x_sa2_sequence = seq; 4065 p->sadb_x_sa2_reqid = reqid; 4066 4067 return m; 4068 } 4069 4070 /* 4071 * set data into sadb_x_policy 4072 */ 4073 static struct mbuf * 4074 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id) 4075 { 4076 struct mbuf *m; 4077 struct sadb_x_policy *p; 4078 size_t len; 4079 4080 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy)); 4081 m = key_alloc_mbuf(len); 4082 if (!m || m->m_next) { /*XXX*/ 4083 if (m) 4084 m_freem(m); 4085 return NULL; 4086 } 4087 4088 p = mtod(m, struct sadb_x_policy *); 4089 4090 memset(p, 0, len); 4091 p->sadb_x_policy_len = PFKEY_UNIT64(len); 4092 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY; 4093 p->sadb_x_policy_type = type; 4094 p->sadb_x_policy_dir = dir; 4095 p->sadb_x_policy_id = id; 4096 4097 return m; 4098 } 4099 4100 /* %%% utilities */ 4101 /* 4102 * copy a buffer into the new buffer allocated. 4103 */ 4104 static void * 4105 key_newbuf(const void *src, u_int len) 4106 { 4107 void *new; 4108 4109 new = kmem_alloc(len, KM_SLEEP); 4110 memcpy(new, src, len); 4111 4112 return new; 4113 } 4114 4115 /* compare my own address 4116 * OUT: 1: true, i.e. my address. 4117 * 0: false 4118 */ 4119 int 4120 key_ismyaddr(const struct sockaddr *sa) 4121 { 4122 #ifdef INET 4123 const struct sockaddr_in *sin; 4124 const struct in_ifaddr *ia; 4125 int s; 4126 #endif 4127 4128 KASSERT(sa != NULL); 4129 4130 switch (sa->sa_family) { 4131 #ifdef INET 4132 case AF_INET: 4133 sin = (const struct sockaddr_in *)sa; 4134 s = pserialize_read_enter(); 4135 IN_ADDRLIST_READER_FOREACH(ia) { 4136 if (sin->sin_family == ia->ia_addr.sin_family && 4137 sin->sin_len == ia->ia_addr.sin_len && 4138 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr) 4139 { 4140 pserialize_read_exit(s); 4141 return 1; 4142 } 4143 } 4144 pserialize_read_exit(s); 4145 break; 4146 #endif 4147 #ifdef INET6 4148 case AF_INET6: 4149 return key_ismyaddr6((const struct sockaddr_in6 *)sa); 4150 #endif 4151 } 4152 4153 return 0; 4154 } 4155 4156 #ifdef INET6 4157 /* 4158 * compare my own address for IPv6. 4159 * 1: ours 4160 * 0: other 4161 * NOTE: derived ip6_input() in KAME. This is necessary to modify more. 4162 */ 4163 #include <netinet6/in6_var.h> 4164 4165 static int 4166 key_ismyaddr6(const struct sockaddr_in6 *sin6) 4167 { 4168 struct in6_ifaddr *ia; 4169 int s; 4170 struct psref psref; 4171 int bound; 4172 int ours = 1; 4173 4174 bound = curlwp_bind(); 4175 s = pserialize_read_enter(); 4176 IN6_ADDRLIST_READER_FOREACH(ia) { 4177 bool ingroup; 4178 4179 if (key_sockaddr_match((const struct sockaddr *)&sin6, 4180 (const struct sockaddr *)&ia->ia_addr, 0)) { 4181 pserialize_read_exit(s); 4182 goto ours; 4183 } 4184 ia6_acquire(ia, &psref); 4185 pserialize_read_exit(s); 4186 4187 /* 4188 * XXX Multicast 4189 * XXX why do we care about multlicast here while we don't care 4190 * about IPv4 multicast?? 4191 * XXX scope 4192 */ 4193 ingroup = in6_multi_group(&sin6->sin6_addr, ia->ia_ifp); 4194 if (ingroup) { 4195 ia6_release(ia, &psref); 4196 goto ours; 4197 } 4198 4199 s = pserialize_read_enter(); 4200 ia6_release(ia, &psref); 4201 } 4202 pserialize_read_exit(s); 4203 4204 /* loopback, just for safety */ 4205 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr)) 4206 goto ours; 4207 4208 ours = 0; 4209 ours: 4210 curlwp_bindx(bound); 4211 4212 return ours; 4213 } 4214 #endif /*INET6*/ 4215 4216 /* 4217 * compare two secasindex structure. 4218 * flag can specify to compare 2 saidxes. 4219 * compare two secasindex structure without both mode and reqid. 4220 * don't compare port. 4221 * IN: 4222 * saidx0: source, it can be in SAD. 4223 * saidx1: object. 4224 * OUT: 4225 * 1 : equal 4226 * 0 : not equal 4227 */ 4228 static int 4229 key_saidx_match( 4230 const struct secasindex *saidx0, 4231 const struct secasindex *saidx1, 4232 int flag) 4233 { 4234 int chkport; 4235 const struct sockaddr *sa0src, *sa0dst, *sa1src, *sa1dst; 4236 4237 KASSERT(saidx0 != NULL); 4238 KASSERT(saidx1 != NULL); 4239 4240 /* sanity */ 4241 if (saidx0->proto != saidx1->proto) 4242 return 0; 4243 4244 if (flag == CMP_EXACTLY) { 4245 if (saidx0->mode != saidx1->mode) 4246 return 0; 4247 if (saidx0->reqid != saidx1->reqid) 4248 return 0; 4249 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 || 4250 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0) 4251 return 0; 4252 } else { 4253 4254 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */ 4255 if (flag == CMP_MODE_REQID ||flag == CMP_REQID) { 4256 /* 4257 * If reqid of SPD is non-zero, unique SA is required. 4258 * The result must be of same reqid in this case. 4259 */ 4260 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid) 4261 return 0; 4262 } 4263 4264 if (flag == CMP_MODE_REQID) { 4265 if (saidx0->mode != IPSEC_MODE_ANY && 4266 saidx0->mode != saidx1->mode) 4267 return 0; 4268 } 4269 4270 4271 sa0src = &saidx0->src.sa; 4272 sa0dst = &saidx0->dst.sa; 4273 sa1src = &saidx1->src.sa; 4274 sa1dst = &saidx1->dst.sa; 4275 /* 4276 * If NAT-T is enabled, check ports for tunnel mode. 4277 * Don't do it for transport mode, as there is no 4278 * port information available in the SP. 4279 * Also don't check ports if they are set to zero 4280 * in the SPD: This means we have a non-generated 4281 * SPD which can't know UDP ports. 4282 */ 4283 if (saidx1->mode == IPSEC_MODE_TUNNEL) 4284 chkport = PORT_LOOSE; 4285 else 4286 chkport = PORT_NONE; 4287 4288 if (!key_sockaddr_match(sa0src, sa1src, chkport)) { 4289 return 0; 4290 } 4291 if (!key_sockaddr_match(sa0dst, sa1dst, chkport)) { 4292 return 0; 4293 } 4294 } 4295 4296 return 1; 4297 } 4298 4299 /* 4300 * compare two secindex structure exactly. 4301 * IN: 4302 * spidx0: source, it is often in SPD. 4303 * spidx1: object, it is often from PFKEY message. 4304 * OUT: 4305 * 1 : equal 4306 * 0 : not equal 4307 */ 4308 static int 4309 key_spidx_match_exactly( 4310 const struct secpolicyindex *spidx0, 4311 const struct secpolicyindex *spidx1) 4312 { 4313 4314 KASSERT(spidx0 != NULL); 4315 KASSERT(spidx1 != NULL); 4316 4317 /* sanity */ 4318 if (spidx0->prefs != spidx1->prefs || 4319 spidx0->prefd != spidx1->prefd || 4320 spidx0->ul_proto != spidx1->ul_proto) 4321 return 0; 4322 4323 return key_sockaddr_match(&spidx0->src.sa, &spidx1->src.sa, PORT_STRICT) && 4324 key_sockaddr_match(&spidx0->dst.sa, &spidx1->dst.sa, PORT_STRICT); 4325 } 4326 4327 /* 4328 * compare two secindex structure with mask. 4329 * IN: 4330 * spidx0: source, it is often in SPD. 4331 * spidx1: object, it is often from IP header. 4332 * OUT: 4333 * 1 : equal 4334 * 0 : not equal 4335 */ 4336 static int 4337 key_spidx_match_withmask( 4338 const struct secpolicyindex *spidx0, 4339 const struct secpolicyindex *spidx1) 4340 { 4341 4342 KASSERT(spidx0 != NULL); 4343 KASSERT(spidx1 != NULL); 4344 4345 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family || 4346 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family || 4347 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len || 4348 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len) 4349 return 0; 4350 4351 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */ 4352 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY && 4353 spidx0->ul_proto != spidx1->ul_proto) 4354 return 0; 4355 4356 switch (spidx0->src.sa.sa_family) { 4357 case AF_INET: 4358 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY && 4359 spidx0->src.sin.sin_port != spidx1->src.sin.sin_port) 4360 return 0; 4361 if (!key_bb_match_withmask(&spidx0->src.sin.sin_addr, 4362 &spidx1->src.sin.sin_addr, spidx0->prefs)) 4363 return 0; 4364 break; 4365 case AF_INET6: 4366 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY && 4367 spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port) 4368 return 0; 4369 /* 4370 * scope_id check. if sin6_scope_id is 0, we regard it 4371 * as a wildcard scope, which matches any scope zone ID. 4372 */ 4373 if (spidx0->src.sin6.sin6_scope_id && 4374 spidx1->src.sin6.sin6_scope_id && 4375 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id) 4376 return 0; 4377 if (!key_bb_match_withmask(&spidx0->src.sin6.sin6_addr, 4378 &spidx1->src.sin6.sin6_addr, spidx0->prefs)) 4379 return 0; 4380 break; 4381 default: 4382 /* XXX */ 4383 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0) 4384 return 0; 4385 break; 4386 } 4387 4388 switch (spidx0->dst.sa.sa_family) { 4389 case AF_INET: 4390 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY && 4391 spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port) 4392 return 0; 4393 if (!key_bb_match_withmask(&spidx0->dst.sin.sin_addr, 4394 &spidx1->dst.sin.sin_addr, spidx0->prefd)) 4395 return 0; 4396 break; 4397 case AF_INET6: 4398 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY && 4399 spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port) 4400 return 0; 4401 /* 4402 * scope_id check. if sin6_scope_id is 0, we regard it 4403 * as a wildcard scope, which matches any scope zone ID. 4404 */ 4405 if (spidx0->src.sin6.sin6_scope_id && 4406 spidx1->src.sin6.sin6_scope_id && 4407 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id) 4408 return 0; 4409 if (!key_bb_match_withmask(&spidx0->dst.sin6.sin6_addr, 4410 &spidx1->dst.sin6.sin6_addr, spidx0->prefd)) 4411 return 0; 4412 break; 4413 default: 4414 /* XXX */ 4415 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0) 4416 return 0; 4417 break; 4418 } 4419 4420 /* XXX Do we check other field ? e.g. flowinfo */ 4421 4422 return 1; 4423 } 4424 4425 /* returns 0 on match */ 4426 static int 4427 key_portcomp(in_port_t port1, in_port_t port2, int howport) 4428 { 4429 switch (howport) { 4430 case PORT_NONE: 4431 return 0; 4432 case PORT_LOOSE: 4433 if (port1 == 0 || port2 == 0) 4434 return 0; 4435 /*FALLTHROUGH*/ 4436 case PORT_STRICT: 4437 if (port1 != port2) { 4438 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4439 "port fail %d != %d\n", port1, port2); 4440 return 1; 4441 } 4442 return 0; 4443 default: 4444 KASSERT(0); 4445 return 1; 4446 } 4447 } 4448 4449 /* returns 1 on match */ 4450 static int 4451 key_sockaddr_match( 4452 const struct sockaddr *sa1, 4453 const struct sockaddr *sa2, 4454 int howport) 4455 { 4456 const struct sockaddr_in *sin1, *sin2; 4457 const struct sockaddr_in6 *sin61, *sin62; 4458 4459 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len) { 4460 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4461 "fam/len fail %d != %d || %d != %d\n", 4462 sa1->sa_family, sa2->sa_family, sa1->sa_len, 4463 sa2->sa_len); 4464 return 0; 4465 } 4466 4467 switch (sa1->sa_family) { 4468 case AF_INET: 4469 if (sa1->sa_len != sizeof(struct sockaddr_in)) { 4470 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4471 "len fail %d != %zu\n", 4472 sa1->sa_len, sizeof(struct sockaddr_in)); 4473 return 0; 4474 } 4475 sin1 = (const struct sockaddr_in *)sa1; 4476 sin2 = (const struct sockaddr_in *)sa2; 4477 if (sin1->sin_addr.s_addr != sin2->sin_addr.s_addr) { 4478 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4479 "addr fail %#x != %#x\n", 4480 sin1->sin_addr.s_addr, sin2->sin_addr.s_addr); 4481 return 0; 4482 } 4483 if (key_portcomp(sin1->sin_port, sin2->sin_port, howport)) { 4484 return 0; 4485 } 4486 KEYDEBUG_PRINTF(KEYDEBUG_MATCH, 4487 "addr success %#x[%d] == %#x[%d]\n", 4488 sin1->sin_addr.s_addr, sin1->sin_port, 4489 sin2->sin_addr.s_addr, sin2->sin_port); 4490 break; 4491 case AF_INET6: 4492 sin61 = (const struct sockaddr_in6 *)sa1; 4493 sin62 = (const struct sockaddr_in6 *)sa2; 4494 if (sa1->sa_len != sizeof(struct sockaddr_in6)) 4495 return 0; /*EINVAL*/ 4496 4497 if (sin61->sin6_scope_id != sin62->sin6_scope_id) { 4498 return 0; 4499 } 4500 if (!IN6_ARE_ADDR_EQUAL(&sin61->sin6_addr, &sin62->sin6_addr)) { 4501 return 0; 4502 } 4503 if (key_portcomp(sin61->sin6_port, sin62->sin6_port, howport)) { 4504 return 0; 4505 } 4506 break; 4507 default: 4508 if (memcmp(sa1, sa2, sa1->sa_len) != 0) 4509 return 0; 4510 break; 4511 } 4512 4513 return 1; 4514 } 4515 4516 /* 4517 * compare two buffers with mask. 4518 * IN: 4519 * addr1: source 4520 * addr2: object 4521 * bits: Number of bits to compare 4522 * OUT: 4523 * 1 : equal 4524 * 0 : not equal 4525 */ 4526 static int 4527 key_bb_match_withmask(const void *a1, const void *a2, u_int bits) 4528 { 4529 const unsigned char *p1 = a1; 4530 const unsigned char *p2 = a2; 4531 4532 /* XXX: This could be considerably faster if we compare a word 4533 * at a time, but it is complicated on LSB Endian machines */ 4534 4535 /* Handle null pointers */ 4536 if (p1 == NULL || p2 == NULL) 4537 return (p1 == p2); 4538 4539 while (bits >= 8) { 4540 if (*p1++ != *p2++) 4541 return 0; 4542 bits -= 8; 4543 } 4544 4545 if (bits > 0) { 4546 u_int8_t mask = ~((1<<(8-bits))-1); 4547 if ((*p1 & mask) != (*p2 & mask)) 4548 return 0; 4549 } 4550 return 1; /* Match! */ 4551 } 4552 4553 static void 4554 key_timehandler_spd(time_t now) 4555 { 4556 u_int dir; 4557 struct secpolicy *sp; 4558 4559 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 4560 retry: 4561 mutex_enter(&key_spd.lock); 4562 SPLIST_WRITER_FOREACH(sp, dir) { 4563 KASSERT(sp->state != IPSEC_SPSTATE_DEAD); 4564 4565 if (sp->lifetime == 0 && sp->validtime == 0) 4566 continue; 4567 4568 if ((sp->lifetime && now - sp->created > sp->lifetime) || 4569 (sp->validtime && now - sp->lastused > sp->validtime)) { 4570 key_unlink_sp(sp); 4571 mutex_exit(&key_spd.lock); 4572 key_spdexpire(sp); 4573 key_destroy_sp(sp); 4574 goto retry; 4575 } 4576 } 4577 mutex_exit(&key_spd.lock); 4578 } 4579 4580 retry_socksplist: 4581 mutex_enter(&key_spd.lock); 4582 SOCKSPLIST_WRITER_FOREACH(sp) { 4583 if (sp->state != IPSEC_SPSTATE_DEAD) 4584 continue; 4585 4586 key_unlink_sp(sp); 4587 mutex_exit(&key_spd.lock); 4588 key_destroy_sp(sp); 4589 goto retry_socksplist; 4590 } 4591 mutex_exit(&key_spd.lock); 4592 } 4593 4594 static void 4595 key_timehandler_sad(time_t now) 4596 { 4597 struct secashead *sah; 4598 struct secasvar *sav; 4599 4600 restart: 4601 SAHLIST_WRITER_FOREACH(sah) { 4602 /* if sah has been dead, then delete it and process next sah. */ 4603 if (sah->state == SADB_SASTATE_DEAD) { 4604 key_delsah(sah); 4605 goto restart; 4606 } 4607 4608 /* if LARVAL entry doesn't become MATURE, delete it. */ 4609 restart_sav_LARVAL: 4610 SAVLIST_READER_FOREACH(sav, sah, SADB_SASTATE_LARVAL) { 4611 if (now - sav->created > key_larval_lifetime) { 4612 KEY_FREESAV(&sav); 4613 goto restart_sav_LARVAL; 4614 } 4615 } 4616 4617 /* 4618 * check MATURE entry to start to send expire message 4619 * whether or not. 4620 */ 4621 restart_sav_MATURE: 4622 SAVLIST_READER_FOREACH(sav, sah, SADB_SASTATE_MATURE) { 4623 /* we don't need to check. */ 4624 if (sav->lft_s == NULL) 4625 continue; 4626 4627 /* sanity check */ 4628 KASSERT(sav->lft_c != NULL); 4629 4630 /* check SOFT lifetime */ 4631 if (sav->lft_s->sadb_lifetime_addtime != 0 && 4632 now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4633 /* 4634 * check SA to be used whether or not. 4635 * when SA hasn't been used, delete it. 4636 */ 4637 if (sav->lft_c->sadb_lifetime_usetime == 0) { 4638 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4639 KEY_FREESAV(&sav); 4640 } else { 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 } 4649 goto restart_sav_MATURE; 4650 } 4651 /* check SOFT lifetime by bytes */ 4652 /* 4653 * XXX I don't know the way to delete this SA 4654 * when new SA is installed. Caution when it's 4655 * installed too big lifetime by time. 4656 */ 4657 else if (sav->lft_s->sadb_lifetime_bytes != 0 && 4658 sav->lft_s->sadb_lifetime_bytes < 4659 sav->lft_c->sadb_lifetime_bytes) { 4660 4661 key_sa_chgstate(sav, SADB_SASTATE_DYING); 4662 /* 4663 * XXX If we keep to send expire 4664 * message in the status of 4665 * DYING. Do remove below code. 4666 */ 4667 key_expire(sav); 4668 goto restart_sav_MATURE; 4669 } 4670 } 4671 4672 /* check DYING entry to change status to DEAD. */ 4673 restart_sav_DYING: 4674 SAVLIST_READER_FOREACH(sav, sah, SADB_SASTATE_DYING) { 4675 /* we don't need to check. */ 4676 if (sav->lft_h == NULL) 4677 continue; 4678 4679 /* sanity check */ 4680 KASSERT(sav->lft_c != NULL); 4681 4682 if (sav->lft_h->sadb_lifetime_addtime != 0 && 4683 now - sav->created > sav->lft_h->sadb_lifetime_addtime) { 4684 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4685 KEY_FREESAV(&sav); 4686 goto restart_sav_DYING; 4687 } 4688 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */ 4689 else if (sav->lft_s != NULL 4690 && sav->lft_s->sadb_lifetime_addtime != 0 4691 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) { 4692 /* 4693 * XXX: should be checked to be 4694 * installed the valid SA. 4695 */ 4696 4697 /* 4698 * If there is no SA then sending 4699 * expire message. 4700 */ 4701 key_expire(sav); 4702 } 4703 #endif 4704 /* check HARD lifetime by bytes */ 4705 else if (sav->lft_h->sadb_lifetime_bytes != 0 && 4706 sav->lft_h->sadb_lifetime_bytes < 4707 sav->lft_c->sadb_lifetime_bytes) { 4708 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 4709 KEY_FREESAV(&sav); 4710 goto restart_sav_DYING; 4711 } 4712 } 4713 4714 /* delete entry in DEAD */ 4715 SAVLIST_READER_FOREACH(sav, sah, SADB_SASTATE_DEAD) { 4716 /* sanity check */ 4717 if (sav->state != SADB_SASTATE_DEAD) { 4718 IPSECLOG(LOG_DEBUG, 4719 "invalid sav->state (queue: %d SA: %d): " 4720 "kill it anyway\n", 4721 SADB_SASTATE_DEAD, sav->state); 4722 } 4723 4724 /* 4725 * do not call key_freesav() here. 4726 * sav should already be freed, and sav->refcnt 4727 * shows other references to sav 4728 * (such as from SPD). 4729 */ 4730 } 4731 } 4732 } 4733 4734 static void 4735 key_timehandler_acq(time_t now) 4736 { 4737 #ifndef IPSEC_NONBLOCK_ACQUIRE 4738 struct secacq *acq, *nextacq; 4739 4740 restart: 4741 mutex_enter(&key_misc.lock); 4742 LIST_FOREACH_SAFE(acq, &key_misc.acqlist, chain, nextacq) { 4743 if (now - acq->created > key_blockacq_lifetime) { 4744 LIST_REMOVE(acq, chain); 4745 mutex_exit(&key_misc.lock); 4746 kmem_free(acq, sizeof(*acq)); 4747 goto restart; 4748 } 4749 } 4750 mutex_exit(&key_misc.lock); 4751 #endif 4752 } 4753 4754 static void 4755 key_timehandler_spacq(time_t now) 4756 { 4757 #ifdef notyet 4758 struct secspacq *acq, *nextacq; 4759 4760 LIST_FOREACH_SAFE(acq, &key_misc.spacqlist, chain, nextacq) { 4761 if (now - acq->created > key_blockacq_lifetime) { 4762 KASSERT(__LIST_CHAINED(acq)); 4763 LIST_REMOVE(acq, chain); 4764 kmem_free(acq, sizeof(*acq)); 4765 } 4766 } 4767 #endif 4768 } 4769 4770 /* 4771 * time handler. 4772 * scanning SPD and SAD to check status for each entries, 4773 * and do to remove or to expire. 4774 */ 4775 static void 4776 key_timehandler_work(struct work *wk, void *arg) 4777 { 4778 time_t now = time_uptime; 4779 IPSEC_DECLARE_LOCK_VARIABLE; 4780 4781 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 4782 4783 key_timehandler_spd(now); 4784 key_timehandler_sad(now); 4785 key_timehandler_acq(now); 4786 key_timehandler_spacq(now); 4787 4788 /* do exchange to tick time !! */ 4789 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 4790 4791 IPSEC_RELEASE_GLOBAL_LOCKS(); 4792 return; 4793 } 4794 4795 static void 4796 key_timehandler(void *arg) 4797 { 4798 4799 workqueue_enqueue(key_timehandler_wq, &key_timehandler_wk, NULL); 4800 } 4801 4802 u_long 4803 key_random(void) 4804 { 4805 u_long value; 4806 4807 key_randomfill(&value, sizeof(value)); 4808 return value; 4809 } 4810 4811 void 4812 key_randomfill(void *p, size_t l) 4813 { 4814 4815 cprng_fast(p, l); 4816 } 4817 4818 /* 4819 * map SADB_SATYPE_* to IPPROTO_*. 4820 * if satype == SADB_SATYPE then satype is mapped to ~0. 4821 * OUT: 4822 * 0: invalid satype. 4823 */ 4824 static u_int16_t 4825 key_satype2proto(u_int8_t satype) 4826 { 4827 switch (satype) { 4828 case SADB_SATYPE_UNSPEC: 4829 return IPSEC_PROTO_ANY; 4830 case SADB_SATYPE_AH: 4831 return IPPROTO_AH; 4832 case SADB_SATYPE_ESP: 4833 return IPPROTO_ESP; 4834 case SADB_X_SATYPE_IPCOMP: 4835 return IPPROTO_IPCOMP; 4836 case SADB_X_SATYPE_TCPSIGNATURE: 4837 return IPPROTO_TCP; 4838 default: 4839 return 0; 4840 } 4841 /* NOTREACHED */ 4842 } 4843 4844 /* 4845 * map IPPROTO_* to SADB_SATYPE_* 4846 * OUT: 4847 * 0: invalid protocol type. 4848 */ 4849 static u_int8_t 4850 key_proto2satype(u_int16_t proto) 4851 { 4852 switch (proto) { 4853 case IPPROTO_AH: 4854 return SADB_SATYPE_AH; 4855 case IPPROTO_ESP: 4856 return SADB_SATYPE_ESP; 4857 case IPPROTO_IPCOMP: 4858 return SADB_X_SATYPE_IPCOMP; 4859 case IPPROTO_TCP: 4860 return SADB_X_SATYPE_TCPSIGNATURE; 4861 default: 4862 return 0; 4863 } 4864 /* NOTREACHED */ 4865 } 4866 4867 static int 4868 key_setsecasidx(int proto, int mode, int reqid, 4869 const struct sockaddr *src, const struct sockaddr *dst, 4870 struct secasindex * saidx) 4871 { 4872 const union sockaddr_union *src_u = (const union sockaddr_union *)src; 4873 const union sockaddr_union *dst_u = (const union sockaddr_union *)dst; 4874 4875 /* sa len safety check */ 4876 if (key_checksalen(src_u) != 0) 4877 return -1; 4878 if (key_checksalen(dst_u) != 0) 4879 return -1; 4880 4881 memset(saidx, 0, sizeof(*saidx)); 4882 saidx->proto = proto; 4883 saidx->mode = mode; 4884 saidx->reqid = reqid; 4885 memcpy(&saidx->src, src_u, src_u->sa.sa_len); 4886 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len); 4887 4888 key_porttosaddr(&((saidx)->src), 0); 4889 key_porttosaddr(&((saidx)->dst), 0); 4890 return 0; 4891 } 4892 4893 static void 4894 key_init_spidx_bymsghdr(struct secpolicyindex *spidx, 4895 const struct sadb_msghdr *mhp) 4896 { 4897 const struct sadb_address *src0, *dst0; 4898 const struct sockaddr *src, *dst; 4899 const struct sadb_x_policy *xpl0; 4900 4901 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC]; 4902 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST]; 4903 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4904 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4905 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY]; 4906 4907 memset(spidx, 0, sizeof(*spidx)); 4908 spidx->dir = xpl0->sadb_x_policy_dir; 4909 spidx->prefs = src0->sadb_address_prefixlen; 4910 spidx->prefd = dst0->sadb_address_prefixlen; 4911 spidx->ul_proto = src0->sadb_address_proto; 4912 /* XXX boundary check against sa_len */ 4913 memcpy(&spidx->src, src, src->sa_len); 4914 memcpy(&spidx->dst, dst, dst->sa_len); 4915 } 4916 4917 /* %%% PF_KEY */ 4918 /* 4919 * SADB_GETSPI processing is to receive 4920 * <base, (SA2), src address, dst address, (SPI range)> 4921 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND 4922 * tree with the status of LARVAL, and send 4923 * <base, SA(*), address(SD)> 4924 * to the IKMPd. 4925 * 4926 * IN: mhp: pointer to the pointer to each header. 4927 * OUT: NULL if fail. 4928 * other if success, return pointer to the message to send. 4929 */ 4930 static int 4931 key_api_getspi(struct socket *so, struct mbuf *m, 4932 const struct sadb_msghdr *mhp) 4933 { 4934 const struct sockaddr *src, *dst; 4935 struct secasindex saidx; 4936 struct secashead *sah; 4937 struct secasvar *newsav; 4938 u_int8_t proto; 4939 u_int32_t spi; 4940 u_int8_t mode; 4941 u_int16_t reqid; 4942 int error; 4943 4944 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 4945 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 4946 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4947 return key_senderror(so, m, EINVAL); 4948 } 4949 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 4950 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 4951 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 4952 return key_senderror(so, m, EINVAL); 4953 } 4954 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 4955 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 4956 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 4957 } else { 4958 mode = IPSEC_MODE_ANY; 4959 reqid = 0; 4960 } 4961 4962 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 4963 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 4964 4965 /* map satype to proto */ 4966 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 4967 if (proto == 0) { 4968 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 4969 return key_senderror(so, m, EINVAL); 4970 } 4971 4972 4973 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 4974 if (error != 0) 4975 return key_senderror(so, m, EINVAL); 4976 4977 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 4978 if (error != 0) 4979 return key_senderror(so, m, EINVAL); 4980 4981 /* SPI allocation */ 4982 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], 4983 &saidx); 4984 if (spi == 0) 4985 return key_senderror(so, m, EINVAL); 4986 4987 /* get a SA index */ 4988 sah = key_getsah(&saidx, CMP_REQID); 4989 if (sah == NULL) { 4990 /* create a new SA index */ 4991 sah = key_newsah(&saidx); 4992 if (sah == NULL) { 4993 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 4994 return key_senderror(so, m, ENOBUFS); 4995 } 4996 } 4997 4998 /* get a new SA */ 4999 /* XXX rewrite */ 5000 newsav = KEY_NEWSAV(m, mhp, &error); 5001 if (newsav == NULL) { 5002 /* XXX don't free new SA index allocated in above. */ 5003 return key_senderror(so, m, error); 5004 } 5005 5006 /* set spi */ 5007 newsav->spi = htonl(spi); 5008 5009 /* add to satree */ 5010 newsav->refcnt = 1; 5011 newsav->sah = sah; 5012 newsav->state = SADB_SASTATE_LARVAL; 5013 SAVLIST_ENTRY_INIT(newsav); 5014 mutex_enter(&key_sad.lock); 5015 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_LARVAL, newsav); 5016 mutex_exit(&key_sad.lock); 5017 key_validate_savlist(sah, SADB_SASTATE_LARVAL); 5018 5019 #ifndef IPSEC_NONBLOCK_ACQUIRE 5020 /* delete the entry in key_misc.acqlist */ 5021 if (mhp->msg->sadb_msg_seq != 0) { 5022 struct secacq *acq; 5023 mutex_enter(&key_misc.lock); 5024 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 5025 if (acq != NULL) { 5026 /* reset counter in order to deletion by timehandler. */ 5027 acq->created = time_uptime; 5028 acq->count = 0; 5029 } 5030 mutex_exit(&key_misc.lock); 5031 } 5032 #endif 5033 5034 { 5035 struct mbuf *n, *nn; 5036 struct sadb_sa *m_sa; 5037 int off, len; 5038 5039 CTASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5040 PFKEY_ALIGN8(sizeof(struct sadb_sa)) <= MCLBYTES); 5041 5042 /* create new sadb_msg to reply. */ 5043 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) + 5044 PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5045 5046 MGETHDR(n, M_DONTWAIT, MT_DATA); 5047 if (len > MHLEN) { 5048 MCLGET(n, M_DONTWAIT); 5049 if ((n->m_flags & M_EXT) == 0) { 5050 m_freem(n); 5051 n = NULL; 5052 } 5053 } 5054 if (!n) 5055 return key_senderror(so, m, ENOBUFS); 5056 5057 n->m_len = len; 5058 n->m_next = NULL; 5059 off = 0; 5060 5061 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 5062 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 5063 5064 m_sa = (struct sadb_sa *)(mtod(n, char *) + off); 5065 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa)); 5066 m_sa->sadb_sa_exttype = SADB_EXT_SA; 5067 m_sa->sadb_sa_spi = htonl(spi); 5068 off += PFKEY_ALIGN8(sizeof(struct sadb_sa)); 5069 5070 KASSERTMSG(off == len, "length inconsistency"); 5071 5072 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC, 5073 SADB_EXT_ADDRESS_DST); 5074 if (!n->m_next) { 5075 m_freem(n); 5076 return key_senderror(so, m, ENOBUFS); 5077 } 5078 5079 if (n->m_len < sizeof(struct sadb_msg)) { 5080 n = m_pullup(n, sizeof(struct sadb_msg)); 5081 if (n == NULL) 5082 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 5083 } 5084 5085 n->m_pkthdr.len = 0; 5086 for (nn = n; nn; nn = nn->m_next) 5087 n->m_pkthdr.len += nn->m_len; 5088 5089 key_fill_replymsg(n, newsav->seq); 5090 5091 m_freem(m); 5092 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 5093 } 5094 } 5095 5096 /* 5097 * allocating new SPI 5098 * called by key_api_getspi(). 5099 * OUT: 5100 * 0: failure. 5101 * others: success. 5102 */ 5103 static u_int32_t 5104 key_do_getnewspi(const struct sadb_spirange *spirange, 5105 const struct secasindex *saidx) 5106 { 5107 u_int32_t newspi; 5108 u_int32_t spmin, spmax; 5109 int count = key_spi_trycnt; 5110 5111 /* set spi range to allocate */ 5112 if (spirange != NULL) { 5113 spmin = spirange->sadb_spirange_min; 5114 spmax = spirange->sadb_spirange_max; 5115 } else { 5116 spmin = key_spi_minval; 5117 spmax = key_spi_maxval; 5118 } 5119 /* IPCOMP needs 2-byte SPI */ 5120 if (saidx->proto == IPPROTO_IPCOMP) { 5121 u_int32_t t; 5122 if (spmin >= 0x10000) 5123 spmin = 0xffff; 5124 if (spmax >= 0x10000) 5125 spmax = 0xffff; 5126 if (spmin > spmax) { 5127 t = spmin; spmin = spmax; spmax = t; 5128 } 5129 } 5130 5131 if (spmin == spmax) { 5132 if (key_checkspidup(saidx, htonl(spmin))) { 5133 IPSECLOG(LOG_DEBUG, "SPI %u exists already.\n", spmin); 5134 return 0; 5135 } 5136 5137 count--; /* taking one cost. */ 5138 newspi = spmin; 5139 5140 } else { 5141 5142 /* init SPI */ 5143 newspi = 0; 5144 5145 /* when requesting to allocate spi ranged */ 5146 while (count--) { 5147 /* generate pseudo-random SPI value ranged. */ 5148 newspi = spmin + (key_random() % (spmax - spmin + 1)); 5149 5150 if (!key_checkspidup(saidx, htonl(newspi))) 5151 break; 5152 } 5153 5154 if (count == 0 || newspi == 0) { 5155 IPSECLOG(LOG_DEBUG, "to allocate spi is failed.\n"); 5156 return 0; 5157 } 5158 } 5159 5160 /* statistics */ 5161 keystat.getspi_count = 5162 (keystat.getspi_count + key_spi_trycnt - count) / 2; 5163 5164 return newspi; 5165 } 5166 5167 static int 5168 key_handle_natt_info(struct secasvar *sav, 5169 const struct sadb_msghdr *mhp) 5170 { 5171 const char *msg = "?" ; 5172 struct sadb_x_nat_t_type *type; 5173 struct sadb_x_nat_t_port *sport, *dport; 5174 struct sadb_address *iaddr, *raddr; 5175 struct sadb_x_nat_t_frag *frag; 5176 5177 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL || 5178 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL || 5179 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) 5180 return 0; 5181 5182 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) { 5183 msg = "TYPE"; 5184 goto bad; 5185 } 5186 5187 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) { 5188 msg = "SPORT"; 5189 goto bad; 5190 } 5191 5192 if (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) { 5193 msg = "DPORT"; 5194 goto bad; 5195 } 5196 5197 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) { 5198 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5199 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr)) { 5200 msg = "OAI"; 5201 goto bad; 5202 } 5203 } 5204 5205 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) { 5206 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5207 if (mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) { 5208 msg = "OAR"; 5209 goto bad; 5210 } 5211 } 5212 5213 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) { 5214 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) { 5215 msg = "FRAG"; 5216 goto bad; 5217 } 5218 } 5219 5220 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5221 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5222 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5223 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI]; 5224 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR]; 5225 frag = (struct sadb_x_nat_t_frag *)mhp->ext[SADB_X_EXT_NAT_T_FRAG]; 5226 5227 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5228 type->sadb_x_nat_t_type_type, 5229 ntohs(sport->sadb_x_nat_t_port_port), 5230 ntohs(dport->sadb_x_nat_t_port_port)); 5231 5232 sav->natt_type = type->sadb_x_nat_t_type_type; 5233 key_porttosaddr(&sav->sah->saidx.src, sport->sadb_x_nat_t_port_port); 5234 key_porttosaddr(&sav->sah->saidx.dst, dport->sadb_x_nat_t_port_port); 5235 if (frag) 5236 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen; 5237 else 5238 sav->esp_frag = IP_MAXPACKET; 5239 5240 return 0; 5241 bad: 5242 IPSECLOG(LOG_DEBUG, "invalid message %s\n", msg); 5243 __USE(msg); 5244 return -1; 5245 } 5246 5247 /* Just update the IPSEC_NAT_T ports if present */ 5248 static int 5249 key_set_natt_ports(union sockaddr_union *src, union sockaddr_union *dst, 5250 const struct sadb_msghdr *mhp) 5251 { 5252 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL) 5253 IPSECLOG(LOG_DEBUG, "NAT-T OAi present\n"); 5254 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) 5255 IPSECLOG(LOG_DEBUG, "NAT-T OAr present\n"); 5256 5257 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) && 5258 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) && 5259 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) { 5260 struct sadb_x_nat_t_type *type; 5261 struct sadb_x_nat_t_port *sport; 5262 struct sadb_x_nat_t_port *dport; 5263 5264 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) || 5265 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) || 5266 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) { 5267 IPSECLOG(LOG_DEBUG, "invalid message\n"); 5268 return -1; 5269 } 5270 5271 type = (struct sadb_x_nat_t_type *) 5272 mhp->ext[SADB_X_EXT_NAT_T_TYPE]; 5273 sport = (struct sadb_x_nat_t_port *) 5274 mhp->ext[SADB_X_EXT_NAT_T_SPORT]; 5275 dport = (struct sadb_x_nat_t_port *) 5276 mhp->ext[SADB_X_EXT_NAT_T_DPORT]; 5277 5278 key_porttosaddr(src, sport->sadb_x_nat_t_port_port); 5279 key_porttosaddr(dst, dport->sadb_x_nat_t_port_port); 5280 5281 IPSECLOG(LOG_DEBUG, "type %d, sport = %d, dport = %d\n", 5282 type->sadb_x_nat_t_type_type, 5283 ntohs(sport->sadb_x_nat_t_port_port), 5284 ntohs(dport->sadb_x_nat_t_port_port)); 5285 } 5286 5287 return 0; 5288 } 5289 5290 5291 /* 5292 * SADB_UPDATE processing 5293 * receive 5294 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5295 * key(AE), (identity(SD),) (sensitivity)> 5296 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL. 5297 * and send 5298 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5299 * (identity(SD),) (sensitivity)> 5300 * to the ikmpd. 5301 * 5302 * m will always be freed. 5303 */ 5304 static int 5305 key_api_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp) 5306 { 5307 struct sadb_sa *sa0; 5308 const struct sockaddr *src, *dst; 5309 struct secasindex saidx; 5310 struct secashead *sah; 5311 struct secasvar *sav, *newsav; 5312 u_int16_t proto; 5313 u_int8_t mode; 5314 u_int16_t reqid; 5315 int error; 5316 5317 /* map satype to proto */ 5318 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5319 if (proto == 0) { 5320 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5321 return key_senderror(so, m, EINVAL); 5322 } 5323 5324 if (mhp->ext[SADB_EXT_SA] == NULL || 5325 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5326 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5327 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5328 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5329 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5330 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5331 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5332 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5333 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5334 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5335 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5336 return key_senderror(so, m, EINVAL); 5337 } 5338 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5339 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5340 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5341 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5342 return key_senderror(so, m, EINVAL); 5343 } 5344 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5345 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5346 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5347 } else { 5348 mode = IPSEC_MODE_ANY; 5349 reqid = 0; 5350 } 5351 /* XXX boundary checking for other extensions */ 5352 5353 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5354 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5355 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5356 5357 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5358 if (error != 0) 5359 return key_senderror(so, m, EINVAL); 5360 5361 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5362 if (error != 0) 5363 return key_senderror(so, m, EINVAL); 5364 5365 /* get a SA header */ 5366 sah = key_getsah(&saidx, CMP_REQID); 5367 if (sah == NULL) { 5368 IPSECLOG(LOG_DEBUG, "no SA index found.\n"); 5369 return key_senderror(so, m, ENOENT); 5370 } 5371 5372 /* set spidx if there */ 5373 /* XXX rewrite */ 5374 error = key_setident(sah, m, mhp); 5375 if (error) 5376 return key_senderror(so, m, error); 5377 5378 /* find a SA with sequence number. */ 5379 #ifdef IPSEC_DOSEQCHECK 5380 if (mhp->msg->sadb_msg_seq != 0) { 5381 sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq); 5382 if (sav == NULL) { 5383 IPSECLOG(LOG_DEBUG, 5384 "no larval SA with sequence %u exists.\n", 5385 mhp->msg->sadb_msg_seq); 5386 return key_senderror(so, m, ENOENT); 5387 } 5388 } 5389 #else 5390 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5391 if (sav == NULL) { 5392 IPSECLOG(LOG_DEBUG, "no such a SA found (spi:%u)\n", 5393 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5394 return key_senderror(so, m, EINVAL); 5395 } 5396 #endif 5397 5398 /* validity check */ 5399 if (sav->sah->saidx.proto != proto) { 5400 IPSECLOG(LOG_DEBUG, "protocol mismatched (DB=%u param=%u)\n", 5401 sav->sah->saidx.proto, proto); 5402 error = EINVAL; 5403 goto error; 5404 } 5405 #ifdef IPSEC_DOSEQCHECK 5406 if (sav->spi != sa0->sadb_sa_spi) { 5407 IPSECLOG(LOG_DEBUG, "SPI mismatched (DB:%u param:%u)\n", 5408 (u_int32_t)ntohl(sav->spi), 5409 (u_int32_t)ntohl(sa0->sadb_sa_spi)); 5410 error = EINVAL; 5411 goto error; 5412 } 5413 #endif 5414 if (sav->pid != mhp->msg->sadb_msg_pid) { 5415 IPSECLOG(LOG_DEBUG, "pid mismatched (DB:%u param:%u)\n", 5416 sav->pid, mhp->msg->sadb_msg_pid); 5417 error = EINVAL; 5418 goto error; 5419 } 5420 5421 /* 5422 * Allocate a new SA instead of modifying the existing SA directly 5423 * to avoid race conditions. 5424 */ 5425 newsav = kmem_zalloc(sizeof(struct secasvar), KM_SLEEP); 5426 5427 /* copy sav values */ 5428 newsav->spi = sav->spi; 5429 newsav->seq = sav->seq; 5430 newsav->created = sav->created; 5431 newsav->pid = sav->pid; 5432 newsav->sah = sav->sah; 5433 5434 error = key_setsaval(newsav, m, mhp); 5435 if (error) { 5436 key_delsav(newsav); 5437 goto error; 5438 } 5439 5440 error = key_handle_natt_info(newsav, mhp); 5441 if (error != 0) { 5442 key_delsav(newsav); 5443 goto error; 5444 } 5445 5446 error = key_init_xform(newsav); 5447 if (error != 0) { 5448 key_delsav(newsav); 5449 goto error; 5450 } 5451 5452 /* add to satree */ 5453 newsav->refcnt = 1; 5454 newsav->state = SADB_SASTATE_MATURE; 5455 SAVLIST_ENTRY_INIT(newsav); 5456 mutex_enter(&key_sad.lock); 5457 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_MATURE, newsav); 5458 mutex_exit(&key_sad.lock); 5459 key_validate_savlist(sah, SADB_SASTATE_MATURE); 5460 5461 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5462 KEY_FREESAV(&sav); 5463 KEY_FREESAV(&sav); 5464 5465 { 5466 struct mbuf *n; 5467 5468 /* set msg buf from mhp */ 5469 n = key_getmsgbuf_x1(m, mhp); 5470 if (n == NULL) { 5471 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5472 return key_senderror(so, m, ENOBUFS); 5473 } 5474 5475 m_freem(m); 5476 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5477 } 5478 error: 5479 KEY_SA_UNREF(&sav); 5480 return key_senderror(so, m, error); 5481 } 5482 5483 /* 5484 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL. 5485 * only called by key_api_update(). 5486 * OUT: 5487 * NULL : not found 5488 * others : found, pointer to a SA. 5489 */ 5490 #ifdef IPSEC_DOSEQCHECK 5491 static struct secasvar * 5492 key_getsavbyseq(struct secashead *sah, u_int32_t seq) 5493 { 5494 struct secasvar *sav; 5495 u_int state; 5496 int s; 5497 5498 state = SADB_SASTATE_LARVAL; 5499 5500 /* search SAD with sequence number ? */ 5501 s = pserialize_read_enter(); 5502 SAVLIST_READER_FOREACH(sav, sah, state) { 5503 KEY_CHKSASTATE(state, sav->state); 5504 5505 if (sav->seq == seq) { 5506 SA_ADDREF(sav); 5507 KEYDEBUG_PRINTF(KEYDEBUG_IPSEC_STAMP, 5508 "DP cause refcnt++:%d SA:%p\n", 5509 sav->refcnt, sav); 5510 break; 5511 } 5512 } 5513 pserialize_read_exit(s); 5514 5515 return sav; 5516 } 5517 #endif 5518 5519 /* 5520 * SADB_ADD processing 5521 * add an entry to SA database, when received 5522 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5523 * key(AE), (identity(SD),) (sensitivity)> 5524 * from the ikmpd, 5525 * and send 5526 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),) 5527 * (identity(SD),) (sensitivity)> 5528 * to the ikmpd. 5529 * 5530 * IGNORE identity and sensitivity messages. 5531 * 5532 * m will always be freed. 5533 */ 5534 static int 5535 key_api_add(struct socket *so, struct mbuf *m, 5536 const struct sadb_msghdr *mhp) 5537 { 5538 struct sadb_sa *sa0; 5539 const struct sockaddr *src, *dst; 5540 struct secasindex saidx; 5541 struct secashead *sah; 5542 struct secasvar *newsav; 5543 u_int16_t proto; 5544 u_int8_t mode; 5545 u_int16_t reqid; 5546 int error; 5547 5548 /* map satype to proto */ 5549 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5550 if (proto == 0) { 5551 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5552 return key_senderror(so, m, EINVAL); 5553 } 5554 5555 if (mhp->ext[SADB_EXT_SA] == NULL || 5556 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5557 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 5558 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && 5559 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) || 5560 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && 5561 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) || 5562 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL && 5563 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) || 5564 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL && 5565 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) { 5566 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5567 return key_senderror(so, m, EINVAL); 5568 } 5569 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5570 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5571 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5572 /* XXX need more */ 5573 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5574 return key_senderror(so, m, EINVAL); 5575 } 5576 if (mhp->ext[SADB_X_EXT_SA2] != NULL) { 5577 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode; 5578 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid; 5579 } else { 5580 mode = IPSEC_MODE_ANY; 5581 reqid = 0; 5582 } 5583 5584 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5585 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5586 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5587 5588 error = key_setsecasidx(proto, mode, reqid, src, dst, &saidx); 5589 if (error != 0) 5590 return key_senderror(so, m, EINVAL); 5591 5592 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5593 if (error != 0) 5594 return key_senderror(so, m, EINVAL); 5595 5596 /* get a SA header */ 5597 sah = key_getsah(&saidx, CMP_REQID); 5598 if (sah == NULL) { 5599 /* create a new SA header */ 5600 sah = key_newsah(&saidx); 5601 if (sah == NULL) { 5602 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5603 return key_senderror(so, m, ENOBUFS); 5604 } 5605 } 5606 5607 /* set spidx if there */ 5608 /* XXX rewrite */ 5609 error = key_setident(sah, m, mhp); 5610 if (error) { 5611 return key_senderror(so, m, error); 5612 } 5613 5614 { 5615 struct secasvar *sav; 5616 5617 /* We can create new SA only if SPI is differenct. */ 5618 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5619 if (sav != NULL) { 5620 KEY_SA_UNREF(&sav); 5621 IPSECLOG(LOG_DEBUG, "SA already exists.\n"); 5622 return key_senderror(so, m, EEXIST); 5623 } 5624 } 5625 5626 /* create new SA entry. */ 5627 newsav = KEY_NEWSAV(m, mhp, &error); 5628 if (newsav == NULL) { 5629 return key_senderror(so, m, error); 5630 } 5631 newsav->sah = sah; 5632 5633 error = key_handle_natt_info(newsav, mhp); 5634 if (error != 0) { 5635 key_delsav(newsav); 5636 return key_senderror(so, m, EINVAL); 5637 } 5638 5639 error = key_init_xform(newsav); 5640 if (error != 0) { 5641 key_delsav(newsav); 5642 return key_senderror(so, m, error); 5643 } 5644 5645 /* add to satree */ 5646 newsav->refcnt = 1; 5647 newsav->state = SADB_SASTATE_MATURE; 5648 SAVLIST_ENTRY_INIT(newsav); 5649 mutex_enter(&key_sad.lock); 5650 SAVLIST_WRITER_INSERT_TAIL(sah, SADB_SASTATE_MATURE, newsav); 5651 mutex_exit(&key_sad.lock); 5652 key_validate_savlist(sah, SADB_SASTATE_MATURE); 5653 5654 /* 5655 * don't call key_freesav() here, as we would like to keep the SA 5656 * in the database on success. 5657 */ 5658 5659 { 5660 struct mbuf *n; 5661 5662 /* set msg buf from mhp */ 5663 n = key_getmsgbuf_x1(m, mhp); 5664 if (n == NULL) { 5665 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 5666 return key_senderror(so, m, ENOBUFS); 5667 } 5668 5669 m_freem(m); 5670 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5671 } 5672 } 5673 5674 /* m is retained */ 5675 static int 5676 key_setident(struct secashead *sah, struct mbuf *m, 5677 const struct sadb_msghdr *mhp) 5678 { 5679 const struct sadb_ident *idsrc, *iddst; 5680 int idsrclen, iddstlen; 5681 5682 KASSERT(!cpu_softintr_p()); 5683 KASSERT(sah != NULL); 5684 KASSERT(m != NULL); 5685 KASSERT(mhp != NULL); 5686 KASSERT(mhp->msg != NULL); 5687 5688 /* 5689 * Can be called with an existing sah from key_api_update(). 5690 */ 5691 if (sah->idents != NULL) { 5692 kmem_free(sah->idents, sah->idents_len); 5693 sah->idents = NULL; 5694 sah->idents_len = 0; 5695 } 5696 if (sah->identd != NULL) { 5697 kmem_free(sah->identd, sah->identd_len); 5698 sah->identd = NULL; 5699 sah->identd_len = 0; 5700 } 5701 5702 /* don't make buffer if not there */ 5703 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL && 5704 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5705 sah->idents = NULL; 5706 sah->identd = NULL; 5707 return 0; 5708 } 5709 5710 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL || 5711 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) { 5712 IPSECLOG(LOG_DEBUG, "invalid identity.\n"); 5713 return EINVAL; 5714 } 5715 5716 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC]; 5717 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST]; 5718 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC]; 5719 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST]; 5720 5721 /* validity check */ 5722 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) { 5723 IPSECLOG(LOG_DEBUG, "ident type mismatch.\n"); 5724 return EINVAL; 5725 } 5726 5727 switch (idsrc->sadb_ident_type) { 5728 case SADB_IDENTTYPE_PREFIX: 5729 case SADB_IDENTTYPE_FQDN: 5730 case SADB_IDENTTYPE_USERFQDN: 5731 default: 5732 /* XXX do nothing */ 5733 sah->idents = NULL; 5734 sah->identd = NULL; 5735 return 0; 5736 } 5737 5738 /* make structure */ 5739 sah->idents = kmem_alloc(idsrclen, KM_SLEEP); 5740 sah->idents_len = idsrclen; 5741 sah->identd = kmem_alloc(iddstlen, KM_SLEEP); 5742 sah->identd_len = iddstlen; 5743 memcpy(sah->idents, idsrc, idsrclen); 5744 memcpy(sah->identd, iddst, iddstlen); 5745 5746 return 0; 5747 } 5748 5749 /* 5750 * m will not be freed on return. 5751 * it is caller's responsibility to free the result. 5752 */ 5753 static struct mbuf * 5754 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp) 5755 { 5756 struct mbuf *n; 5757 5758 KASSERT(m != NULL); 5759 KASSERT(mhp != NULL); 5760 KASSERT(mhp->msg != NULL); 5761 5762 /* create new sadb_msg to reply. */ 5763 n = key_gather_mbuf(m, mhp, 1, 15, SADB_EXT_RESERVED, 5764 SADB_EXT_SA, SADB_X_EXT_SA2, 5765 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, 5766 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT, 5767 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST, 5768 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT, 5769 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI, 5770 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NAT_T_FRAG); 5771 if (!n) 5772 return NULL; 5773 5774 if (n->m_len < sizeof(struct sadb_msg)) { 5775 n = m_pullup(n, sizeof(struct sadb_msg)); 5776 if (n == NULL) 5777 return NULL; 5778 } 5779 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0; 5780 mtod(n, struct sadb_msg *)->sadb_msg_len = 5781 PFKEY_UNIT64(n->m_pkthdr.len); 5782 5783 return n; 5784 } 5785 5786 static int key_delete_all (struct socket *, struct mbuf *, 5787 const struct sadb_msghdr *, u_int16_t); 5788 5789 /* 5790 * SADB_DELETE processing 5791 * receive 5792 * <base, SA(*), address(SD)> 5793 * from the ikmpd, and set SADB_SASTATE_DEAD, 5794 * and send, 5795 * <base, SA(*), address(SD)> 5796 * to the ikmpd. 5797 * 5798 * m will always be freed. 5799 */ 5800 static int 5801 key_api_delete(struct socket *so, struct mbuf *m, 5802 const struct sadb_msghdr *mhp) 5803 { 5804 struct sadb_sa *sa0; 5805 const struct sockaddr *src, *dst; 5806 struct secasindex saidx; 5807 struct secashead *sah; 5808 struct secasvar *sav = NULL; 5809 u_int16_t proto; 5810 int error; 5811 5812 /* map satype to proto */ 5813 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 5814 if (proto == 0) { 5815 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5816 return key_senderror(so, m, EINVAL); 5817 } 5818 5819 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5820 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5821 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5822 return key_senderror(so, m, EINVAL); 5823 } 5824 5825 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5826 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5827 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5828 return key_senderror(so, m, EINVAL); 5829 } 5830 5831 if (mhp->ext[SADB_EXT_SA] == NULL) { 5832 /* 5833 * Caller wants us to delete all non-LARVAL SAs 5834 * that match the src/dst. This is used during 5835 * IKE INITIAL-CONTACT. 5836 */ 5837 IPSECLOG(LOG_DEBUG, "doing delete all.\n"); 5838 return key_delete_all(so, m, mhp, proto); 5839 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) { 5840 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5841 return key_senderror(so, m, EINVAL); 5842 } 5843 5844 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 5845 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5846 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5847 5848 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5849 if (error != 0) 5850 return key_senderror(so, m, EINVAL); 5851 5852 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5853 if (error != 0) 5854 return key_senderror(so, m, EINVAL); 5855 5856 /* get a SA header */ 5857 sah = key_getsah(&saidx, CMP_HEAD); 5858 if (sah != NULL) { 5859 /* get a SA with SPI. */ 5860 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 5861 } 5862 5863 if (sav == NULL) { 5864 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 5865 return key_senderror(so, m, ENOENT); 5866 } 5867 5868 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5869 KEY_FREESAV(&sav); 5870 KEY_FREESAV(&sav); 5871 5872 { 5873 struct mbuf *n; 5874 5875 /* create new sadb_msg to reply. */ 5876 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED, 5877 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5878 if (!n) 5879 return key_senderror(so, m, ENOBUFS); 5880 5881 n = key_fill_replymsg(n, 0); 5882 if (n == NULL) 5883 return key_senderror(so, m, ENOBUFS); 5884 5885 m_freem(m); 5886 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5887 } 5888 } 5889 5890 /* 5891 * delete all SAs for src/dst. Called from key_api_delete(). 5892 */ 5893 static int 5894 key_delete_all(struct socket *so, struct mbuf *m, 5895 const struct sadb_msghdr *mhp, u_int16_t proto) 5896 { 5897 const struct sockaddr *src, *dst; 5898 struct secasindex saidx; 5899 struct secashead *sah; 5900 struct secasvar *sav; 5901 u_int state; 5902 int error; 5903 5904 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 5905 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 5906 5907 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 5908 if (error != 0) 5909 return key_senderror(so, m, EINVAL); 5910 5911 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 5912 if (error != 0) 5913 return key_senderror(so, m, EINVAL); 5914 5915 sah = key_getsah(&saidx, CMP_HEAD); 5916 if (sah != NULL) { 5917 /* Delete all non-LARVAL SAs. */ 5918 SASTATE_ALIVE_FOREACH(state) { 5919 if (state == SADB_SASTATE_LARVAL) 5920 continue; 5921 restart: 5922 SAVLIST_WRITER_FOREACH(sav, sah, state) { 5923 /* sanity check */ 5924 if (sav->state != state) { 5925 IPSECLOG(LOG_DEBUG, 5926 "invalid sav->state " 5927 "(queue: %d SA: %d)\n", 5928 state, sav->state); 5929 continue; 5930 } 5931 5932 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 5933 KEY_FREESAV(&sav); 5934 goto restart; 5935 } 5936 } 5937 } 5938 { 5939 struct mbuf *n; 5940 5941 /* create new sadb_msg to reply. */ 5942 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED, 5943 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST); 5944 if (!n) 5945 return key_senderror(so, m, ENOBUFS); 5946 5947 n = key_fill_replymsg(n, 0); 5948 if (n == NULL) 5949 return key_senderror(so, m, ENOBUFS); 5950 5951 m_freem(m); 5952 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL); 5953 } 5954 } 5955 5956 /* 5957 * SADB_GET processing 5958 * receive 5959 * <base, SA(*), address(SD)> 5960 * from the ikmpd, and get a SP and a SA to respond, 5961 * and send, 5962 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE), 5963 * (identity(SD),) (sensitivity)> 5964 * to the ikmpd. 5965 * 5966 * m will always be freed. 5967 */ 5968 static int 5969 key_api_get(struct socket *so, struct mbuf *m, 5970 const struct sadb_msghdr *mhp) 5971 { 5972 struct sadb_sa *sa0; 5973 const struct sockaddr *src, *dst; 5974 struct secasindex saidx; 5975 struct secashead *sah; 5976 struct secasvar *sav = NULL; 5977 u_int16_t proto; 5978 int error; 5979 5980 /* map satype to proto */ 5981 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) { 5982 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 5983 return key_senderror(so, m, EINVAL); 5984 } 5985 5986 if (mhp->ext[SADB_EXT_SA] == NULL || 5987 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 5988 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) { 5989 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5990 return key_senderror(so, m, EINVAL); 5991 } 5992 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) || 5993 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 5994 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) { 5995 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 5996 return key_senderror(so, m, EINVAL); 5997 } 5998 5999 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA]; 6000 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6001 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6002 6003 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6004 if (error != 0) 6005 return key_senderror(so, m, EINVAL); 6006 6007 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6008 if (error != 0) 6009 return key_senderror(so, m, EINVAL); 6010 6011 /* get a SA header */ 6012 sah = key_getsah(&saidx, CMP_HEAD); 6013 if (sah != NULL) { 6014 /* get a SA with SPI. */ 6015 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi); 6016 } 6017 if (sav == NULL) { 6018 IPSECLOG(LOG_DEBUG, "no SA found.\n"); 6019 return key_senderror(so, m, ENOENT); 6020 } 6021 6022 { 6023 struct mbuf *n; 6024 u_int8_t satype; 6025 6026 /* map proto to satype */ 6027 satype = key_proto2satype(sah->saidx.proto); 6028 if (satype == 0) { 6029 KEY_SA_UNREF(&sav); 6030 IPSECLOG(LOG_DEBUG, "there was invalid proto in SAD.\n"); 6031 return key_senderror(so, m, EINVAL); 6032 } 6033 6034 /* create new sadb_msg to reply. */ 6035 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq, 6036 mhp->msg->sadb_msg_pid); 6037 KEY_SA_UNREF(&sav); 6038 if (!n) 6039 return key_senderror(so, m, ENOBUFS); 6040 6041 m_freem(m); 6042 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE); 6043 } 6044 } 6045 6046 /* XXX make it sysctl-configurable? */ 6047 static void 6048 key_getcomb_setlifetime(struct sadb_comb *comb) 6049 { 6050 6051 comb->sadb_comb_soft_allocations = 1; 6052 comb->sadb_comb_hard_allocations = 1; 6053 comb->sadb_comb_soft_bytes = 0; 6054 comb->sadb_comb_hard_bytes = 0; 6055 comb->sadb_comb_hard_addtime = 86400; /* 1 day */ 6056 comb->sadb_comb_soft_addtime = comb->sadb_comb_hard_addtime * 80 / 100; 6057 comb->sadb_comb_hard_usetime = 28800; /* 8 hours */ 6058 comb->sadb_comb_soft_usetime = comb->sadb_comb_hard_usetime * 80 / 100; 6059 } 6060 6061 /* 6062 * XXX reorder combinations by preference 6063 * XXX no idea if the user wants ESP authentication or not 6064 */ 6065 static struct mbuf * 6066 key_getcomb_esp(void) 6067 { 6068 struct sadb_comb *comb; 6069 const struct enc_xform *algo; 6070 struct mbuf *result = NULL, *m, *n; 6071 int encmin; 6072 int i, off, o; 6073 int totlen; 6074 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6075 6076 m = NULL; 6077 for (i = 1; i <= SADB_EALG_MAX; i++) { 6078 algo = esp_algorithm_lookup(i); 6079 if (algo == NULL) 6080 continue; 6081 6082 /* discard algorithms with key size smaller than system min */ 6083 if (_BITS(algo->maxkey) < ipsec_esp_keymin) 6084 continue; 6085 if (_BITS(algo->minkey) < ipsec_esp_keymin) 6086 encmin = ipsec_esp_keymin; 6087 else 6088 encmin = _BITS(algo->minkey); 6089 6090 if (ipsec_esp_auth) 6091 m = key_getcomb_ah(); 6092 else { 6093 KASSERTMSG(l <= MLEN, 6094 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6095 MGET(m, M_DONTWAIT, MT_DATA); 6096 if (m) { 6097 M_ALIGN(m, l); 6098 m->m_len = l; 6099 m->m_next = NULL; 6100 memset(mtod(m, void *), 0, m->m_len); 6101 } 6102 } 6103 if (!m) 6104 goto fail; 6105 6106 totlen = 0; 6107 for (n = m; n; n = n->m_next) 6108 totlen += n->m_len; 6109 KASSERTMSG((totlen % l) == 0, "totlen=%u, l=%u", totlen, l); 6110 6111 for (off = 0; off < totlen; off += l) { 6112 n = m_pulldown(m, off, l, &o); 6113 if (!n) { 6114 /* m is already freed */ 6115 goto fail; 6116 } 6117 comb = (struct sadb_comb *)(mtod(n, char *) + o); 6118 memset(comb, 0, sizeof(*comb)); 6119 key_getcomb_setlifetime(comb); 6120 comb->sadb_comb_encrypt = i; 6121 comb->sadb_comb_encrypt_minbits = encmin; 6122 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey); 6123 } 6124 6125 if (!result) 6126 result = m; 6127 else 6128 m_cat(result, m); 6129 } 6130 6131 return result; 6132 6133 fail: 6134 if (result) 6135 m_freem(result); 6136 return NULL; 6137 } 6138 6139 static void 6140 key_getsizes_ah(const struct auth_hash *ah, int alg, 6141 u_int16_t* ksmin, u_int16_t* ksmax) 6142 { 6143 *ksmin = *ksmax = ah->keysize; 6144 if (ah->keysize == 0) { 6145 /* 6146 * Transform takes arbitrary key size but algorithm 6147 * key size is restricted. Enforce this here. 6148 */ 6149 switch (alg) { 6150 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break; 6151 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break; 6152 case SADB_X_AALG_NULL: *ksmin = 0; *ksmax = 256; break; 6153 default: 6154 IPSECLOG(LOG_DEBUG, "unknown AH algorithm %u\n", alg); 6155 break; 6156 } 6157 } 6158 } 6159 6160 /* 6161 * XXX reorder combinations by preference 6162 */ 6163 static struct mbuf * 6164 key_getcomb_ah(void) 6165 { 6166 struct sadb_comb *comb; 6167 const struct auth_hash *algo; 6168 struct mbuf *m; 6169 u_int16_t minkeysize, maxkeysize; 6170 int i; 6171 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6172 6173 m = NULL; 6174 for (i = 1; i <= SADB_AALG_MAX; i++) { 6175 #if 1 6176 /* we prefer HMAC algorithms, not old algorithms */ 6177 if (i != SADB_AALG_SHA1HMAC && 6178 i != SADB_AALG_MD5HMAC && 6179 i != SADB_X_AALG_SHA2_256 && 6180 i != SADB_X_AALG_SHA2_384 && 6181 i != SADB_X_AALG_SHA2_512) 6182 continue; 6183 #endif 6184 algo = ah_algorithm_lookup(i); 6185 if (!algo) 6186 continue; 6187 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize); 6188 /* discard algorithms with key size smaller than system min */ 6189 if (_BITS(minkeysize) < ipsec_ah_keymin) 6190 continue; 6191 6192 if (!m) { 6193 KASSERTMSG(l <= MLEN, 6194 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6195 MGET(m, M_DONTWAIT, MT_DATA); 6196 if (m) { 6197 M_ALIGN(m, l); 6198 m->m_len = l; 6199 m->m_next = NULL; 6200 } 6201 } else 6202 M_PREPEND(m, l, M_DONTWAIT); 6203 if (!m) 6204 return NULL; 6205 6206 if (m->m_len < sizeof(struct sadb_comb)) { 6207 m = m_pullup(m, sizeof(struct sadb_comb)); 6208 if (m == NULL) 6209 return NULL; 6210 } 6211 6212 comb = mtod(m, struct sadb_comb *); 6213 memset(comb, 0, sizeof(*comb)); 6214 key_getcomb_setlifetime(comb); 6215 comb->sadb_comb_auth = i; 6216 comb->sadb_comb_auth_minbits = _BITS(minkeysize); 6217 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize); 6218 } 6219 6220 return m; 6221 } 6222 6223 /* 6224 * not really an official behavior. discussed in pf_key (at) inner.net in Sep2000. 6225 * XXX reorder combinations by preference 6226 */ 6227 static struct mbuf * 6228 key_getcomb_ipcomp(void) 6229 { 6230 struct sadb_comb *comb; 6231 const struct comp_algo *algo; 6232 struct mbuf *m; 6233 int i; 6234 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb)); 6235 6236 m = NULL; 6237 for (i = 1; i <= SADB_X_CALG_MAX; i++) { 6238 algo = ipcomp_algorithm_lookup(i); 6239 if (!algo) 6240 continue; 6241 6242 if (!m) { 6243 KASSERTMSG(l <= MLEN, 6244 "l=%u > MLEN=%lu", l, (u_long) MLEN); 6245 MGET(m, M_DONTWAIT, MT_DATA); 6246 if (m) { 6247 M_ALIGN(m, l); 6248 m->m_len = l; 6249 m->m_next = NULL; 6250 } 6251 } else 6252 M_PREPEND(m, l, M_DONTWAIT); 6253 if (!m) 6254 return NULL; 6255 6256 if (m->m_len < sizeof(struct sadb_comb)) { 6257 m = m_pullup(m, sizeof(struct sadb_comb)); 6258 if (m == NULL) 6259 return NULL; 6260 } 6261 6262 comb = mtod(m, struct sadb_comb *); 6263 memset(comb, 0, sizeof(*comb)); 6264 key_getcomb_setlifetime(comb); 6265 comb->sadb_comb_encrypt = i; 6266 /* what should we set into sadb_comb_*_{min,max}bits? */ 6267 } 6268 6269 return m; 6270 } 6271 6272 /* 6273 * XXX no way to pass mode (transport/tunnel) to userland 6274 * XXX replay checking? 6275 * XXX sysctl interface to ipsec_{ah,esp}_keymin 6276 */ 6277 static struct mbuf * 6278 key_getprop(const struct secasindex *saidx) 6279 { 6280 struct sadb_prop *prop; 6281 struct mbuf *m, *n; 6282 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop)); 6283 int totlen; 6284 6285 switch (saidx->proto) { 6286 case IPPROTO_ESP: 6287 m = key_getcomb_esp(); 6288 break; 6289 case IPPROTO_AH: 6290 m = key_getcomb_ah(); 6291 break; 6292 case IPPROTO_IPCOMP: 6293 m = key_getcomb_ipcomp(); 6294 break; 6295 default: 6296 return NULL; 6297 } 6298 6299 if (!m) 6300 return NULL; 6301 M_PREPEND(m, l, M_DONTWAIT); 6302 if (!m) 6303 return NULL; 6304 6305 totlen = 0; 6306 for (n = m; n; n = n->m_next) 6307 totlen += n->m_len; 6308 6309 prop = mtod(m, struct sadb_prop *); 6310 memset(prop, 0, sizeof(*prop)); 6311 prop->sadb_prop_len = PFKEY_UNIT64(totlen); 6312 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL; 6313 prop->sadb_prop_replay = 32; /* XXX */ 6314 6315 return m; 6316 } 6317 6318 /* 6319 * SADB_ACQUIRE processing called by key_checkrequest() and key_api_acquire(). 6320 * send 6321 * <base, SA, address(SD), (address(P)), x_policy, 6322 * (identity(SD),) (sensitivity,) proposal> 6323 * to KMD, and expect to receive 6324 * <base> with SADB_ACQUIRE if error occurred, 6325 * or 6326 * <base, src address, dst address, (SPI range)> with SADB_GETSPI 6327 * from KMD by PF_KEY. 6328 * 6329 * XXX x_policy is outside of RFC2367 (KAME extension). 6330 * XXX sensitivity is not supported. 6331 * XXX for ipcomp, RFC2367 does not define how to fill in proposal. 6332 * see comment for key_getcomb_ipcomp(). 6333 * 6334 * OUT: 6335 * 0 : succeed 6336 * others: error number 6337 */ 6338 static int 6339 key_acquire(const struct secasindex *saidx, struct secpolicy *sp) 6340 { 6341 struct mbuf *result = NULL, *m; 6342 #ifndef IPSEC_NONBLOCK_ACQUIRE 6343 struct secacq *newacq; 6344 #endif 6345 u_int8_t satype; 6346 int error = -1; 6347 u_int32_t seq; 6348 6349 /* sanity check */ 6350 KASSERT(saidx != NULL); 6351 satype = key_proto2satype(saidx->proto); 6352 KASSERTMSG(satype != 0, "null satype, protocol %u", saidx->proto); 6353 6354 #ifndef IPSEC_NONBLOCK_ACQUIRE 6355 /* 6356 * We never do anything about acquirng SA. There is anather 6357 * solution that kernel blocks to send SADB_ACQUIRE message until 6358 * getting something message from IKEd. In later case, to be 6359 * managed with ACQUIRING list. 6360 */ 6361 /* Get an entry to check whether sending message or not. */ 6362 mutex_enter(&key_misc.lock); 6363 newacq = key_getacq(saidx); 6364 if (newacq != NULL) { 6365 if (key_blockacq_count < newacq->count) { 6366 /* reset counter and do send message. */ 6367 newacq->count = 0; 6368 } else { 6369 /* increment counter and do nothing. */ 6370 newacq->count++; 6371 mutex_exit(&key_misc.lock); 6372 return 0; 6373 } 6374 } else { 6375 /* make new entry for blocking to send SADB_ACQUIRE. */ 6376 newacq = key_newacq(saidx); 6377 if (newacq == NULL) 6378 return ENOBUFS; 6379 6380 /* add to key_misc.acqlist */ 6381 LIST_INSERT_HEAD(&key_misc.acqlist, newacq, chain); 6382 } 6383 6384 seq = newacq->seq; 6385 mutex_exit(&key_misc.lock); 6386 #else 6387 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq)); 6388 #endif 6389 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0); 6390 if (!m) { 6391 error = ENOBUFS; 6392 goto fail; 6393 } 6394 result = m; 6395 6396 /* set sadb_address for saidx's. */ 6397 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &saidx->src.sa, FULLMASK, 6398 IPSEC_ULPROTO_ANY); 6399 if (!m) { 6400 error = ENOBUFS; 6401 goto fail; 6402 } 6403 m_cat(result, m); 6404 6405 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &saidx->dst.sa, FULLMASK, 6406 IPSEC_ULPROTO_ANY); 6407 if (!m) { 6408 error = ENOBUFS; 6409 goto fail; 6410 } 6411 m_cat(result, m); 6412 6413 /* XXX proxy address (optional) */ 6414 6415 /* set sadb_x_policy */ 6416 if (sp) { 6417 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id); 6418 if (!m) { 6419 error = ENOBUFS; 6420 goto fail; 6421 } 6422 m_cat(result, m); 6423 } 6424 6425 /* XXX identity (optional) */ 6426 #if 0 6427 if (idexttype && fqdn) { 6428 /* create identity extension (FQDN) */ 6429 struct sadb_ident *id; 6430 int fqdnlen; 6431 6432 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */ 6433 id = (struct sadb_ident *)p; 6434 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6435 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen)); 6436 id->sadb_ident_exttype = idexttype; 6437 id->sadb_ident_type = SADB_IDENTTYPE_FQDN; 6438 memcpy(id + 1, fqdn, fqdnlen); 6439 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen); 6440 } 6441 6442 if (idexttype) { 6443 /* create identity extension (USERFQDN) */ 6444 struct sadb_ident *id; 6445 int userfqdnlen; 6446 6447 if (userfqdn) { 6448 /* +1 for terminating-NUL */ 6449 userfqdnlen = strlen(userfqdn) + 1; 6450 } else 6451 userfqdnlen = 0; 6452 id = (struct sadb_ident *)p; 6453 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6454 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen)); 6455 id->sadb_ident_exttype = idexttype; 6456 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN; 6457 /* XXX is it correct? */ 6458 if (curlwp) 6459 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred); 6460 if (userfqdn && userfqdnlen) 6461 memcpy(id + 1, userfqdn, userfqdnlen); 6462 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen); 6463 } 6464 #endif 6465 6466 /* XXX sensitivity (optional) */ 6467 6468 /* create proposal/combination extension */ 6469 m = key_getprop(saidx); 6470 #if 0 6471 /* 6472 * spec conformant: always attach proposal/combination extension, 6473 * the problem is that we have no way to attach it for ipcomp, 6474 * due to the way sadb_comb is declared in RFC2367. 6475 */ 6476 if (!m) { 6477 error = ENOBUFS; 6478 goto fail; 6479 } 6480 m_cat(result, m); 6481 #else 6482 /* 6483 * outside of spec; make proposal/combination extension optional. 6484 */ 6485 if (m) 6486 m_cat(result, m); 6487 #endif 6488 6489 if ((result->m_flags & M_PKTHDR) == 0) { 6490 error = EINVAL; 6491 goto fail; 6492 } 6493 6494 if (result->m_len < sizeof(struct sadb_msg)) { 6495 result = m_pullup(result, sizeof(struct sadb_msg)); 6496 if (result == NULL) { 6497 error = ENOBUFS; 6498 goto fail; 6499 } 6500 } 6501 6502 result->m_pkthdr.len = 0; 6503 for (m = result; m; m = m->m_next) 6504 result->m_pkthdr.len += m->m_len; 6505 6506 mtod(result, struct sadb_msg *)->sadb_msg_len = 6507 PFKEY_UNIT64(result->m_pkthdr.len); 6508 6509 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 6510 6511 fail: 6512 if (result) 6513 m_freem(result); 6514 return error; 6515 } 6516 6517 #ifndef IPSEC_NONBLOCK_ACQUIRE 6518 static struct secacq * 6519 key_newacq(const struct secasindex *saidx) 6520 { 6521 struct secacq *newacq; 6522 6523 /* get new entry */ 6524 newacq = kmem_intr_zalloc(sizeof(struct secacq), KM_NOSLEEP); 6525 if (newacq == NULL) { 6526 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6527 return NULL; 6528 } 6529 6530 /* copy secindex */ 6531 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx)); 6532 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq); 6533 newacq->created = time_uptime; 6534 newacq->count = 0; 6535 6536 return newacq; 6537 } 6538 6539 static struct secacq * 6540 key_getacq(const struct secasindex *saidx) 6541 { 6542 struct secacq *acq; 6543 6544 KASSERT(mutex_owned(&key_misc.lock)); 6545 6546 LIST_FOREACH(acq, &key_misc.acqlist, chain) { 6547 if (key_saidx_match(saidx, &acq->saidx, CMP_EXACTLY)) 6548 return acq; 6549 } 6550 6551 return NULL; 6552 } 6553 6554 static struct secacq * 6555 key_getacqbyseq(u_int32_t seq) 6556 { 6557 struct secacq *acq; 6558 6559 KASSERT(mutex_owned(&key_misc.lock)); 6560 6561 LIST_FOREACH(acq, &key_misc.acqlist, chain) { 6562 if (acq->seq == seq) 6563 return acq; 6564 } 6565 6566 return NULL; 6567 } 6568 #endif 6569 6570 #ifdef notyet 6571 static struct secspacq * 6572 key_newspacq(const struct secpolicyindex *spidx) 6573 { 6574 struct secspacq *acq; 6575 6576 /* get new entry */ 6577 acq = kmem_intr_zalloc(sizeof(struct secspacq), KM_NOSLEEP); 6578 if (acq == NULL) { 6579 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 6580 return NULL; 6581 } 6582 6583 /* copy secindex */ 6584 memcpy(&acq->spidx, spidx, sizeof(acq->spidx)); 6585 acq->created = time_uptime; 6586 acq->count = 0; 6587 6588 return acq; 6589 } 6590 6591 static struct secspacq * 6592 key_getspacq(const struct secpolicyindex *spidx) 6593 { 6594 struct secspacq *acq; 6595 6596 LIST_FOREACH(acq, &key_misc.spacqlist, chain) { 6597 if (key_spidx_match_exactly(spidx, &acq->spidx)) 6598 return acq; 6599 } 6600 6601 return NULL; 6602 } 6603 #endif /* notyet */ 6604 6605 /* 6606 * SADB_ACQUIRE processing, 6607 * in first situation, is receiving 6608 * <base> 6609 * from the ikmpd, and clear sequence of its secasvar entry. 6610 * 6611 * In second situation, is receiving 6612 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6613 * from a user land process, and return 6614 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal> 6615 * to the socket. 6616 * 6617 * m will always be freed. 6618 */ 6619 static int 6620 key_api_acquire(struct socket *so, struct mbuf *m, 6621 const struct sadb_msghdr *mhp) 6622 { 6623 const struct sockaddr *src, *dst; 6624 struct secasindex saidx; 6625 struct secashead *sah; 6626 u_int16_t proto; 6627 int error; 6628 6629 /* 6630 * Error message from KMd. 6631 * We assume that if error was occurred in IKEd, the length of PFKEY 6632 * message is equal to the size of sadb_msg structure. 6633 * We do not raise error even if error occurred in this function. 6634 */ 6635 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) { 6636 #ifndef IPSEC_NONBLOCK_ACQUIRE 6637 struct secacq *acq; 6638 6639 /* check sequence number */ 6640 if (mhp->msg->sadb_msg_seq == 0) { 6641 IPSECLOG(LOG_DEBUG, "must specify sequence number.\n"); 6642 m_freem(m); 6643 return 0; 6644 } 6645 6646 mutex_enter(&key_misc.lock); 6647 acq = key_getacqbyseq(mhp->msg->sadb_msg_seq); 6648 if (acq == NULL) { 6649 mutex_exit(&key_misc.lock); 6650 /* 6651 * the specified larval SA is already gone, or we got 6652 * a bogus sequence number. we can silently ignore it. 6653 */ 6654 m_freem(m); 6655 return 0; 6656 } 6657 6658 /* reset acq counter in order to deletion by timehander. */ 6659 acq->created = time_uptime; 6660 acq->count = 0; 6661 mutex_exit(&key_misc.lock); 6662 #endif 6663 m_freem(m); 6664 return 0; 6665 } 6666 6667 /* 6668 * This message is from user land. 6669 */ 6670 6671 /* map satype to proto */ 6672 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 6673 if (proto == 0) { 6674 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 6675 return key_senderror(so, m, EINVAL); 6676 } 6677 6678 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL || 6679 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL || 6680 mhp->ext[SADB_EXT_PROPOSAL] == NULL) { 6681 /* error */ 6682 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6683 return key_senderror(so, m, EINVAL); 6684 } 6685 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) || 6686 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) || 6687 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) { 6688 /* error */ 6689 IPSECLOG(LOG_DEBUG, "invalid message is passed.\n"); 6690 return key_senderror(so, m, EINVAL); 6691 } 6692 6693 src = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_SRC); 6694 dst = key_msghdr_get_sockaddr(mhp, SADB_EXT_ADDRESS_DST); 6695 6696 error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src, dst, &saidx); 6697 if (error != 0) 6698 return key_senderror(so, m, EINVAL); 6699 6700 error = key_set_natt_ports(&saidx.src, &saidx.dst, mhp); 6701 if (error != 0) 6702 return key_senderror(so, m, EINVAL); 6703 6704 /* get a SA index */ 6705 sah = key_getsah(&saidx, CMP_MODE_REQID); 6706 if (sah != NULL) { 6707 IPSECLOG(LOG_DEBUG, "a SA exists already.\n"); 6708 return key_senderror(so, m, EEXIST); 6709 } 6710 6711 error = key_acquire(&saidx, NULL); 6712 if (error != 0) { 6713 IPSECLOG(LOG_DEBUG, "error %d returned from key_acquire.\n", 6714 error); 6715 return key_senderror(so, m, error); 6716 } 6717 6718 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED); 6719 } 6720 6721 /* 6722 * SADB_REGISTER processing. 6723 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported. 6724 * receive 6725 * <base> 6726 * from the ikmpd, and register a socket to send PF_KEY messages, 6727 * and send 6728 * <base, supported> 6729 * to KMD by PF_KEY. 6730 * If socket is detached, must free from regnode. 6731 * 6732 * m will always be freed. 6733 */ 6734 static int 6735 key_api_register(struct socket *so, struct mbuf *m, 6736 const struct sadb_msghdr *mhp) 6737 { 6738 struct secreg *reg, *newreg = 0; 6739 6740 /* check for invalid register message */ 6741 if (mhp->msg->sadb_msg_satype >= __arraycount(key_misc.reglist)) 6742 return key_senderror(so, m, EINVAL); 6743 6744 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */ 6745 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC) 6746 goto setmsg; 6747 6748 /* Allocate regnode in advance, out of mutex */ 6749 newreg = kmem_zalloc(sizeof(*newreg), KM_SLEEP); 6750 6751 /* check whether existing or not */ 6752 mutex_enter(&key_misc.lock); 6753 LIST_FOREACH(reg, &key_misc.reglist[mhp->msg->sadb_msg_satype], chain) { 6754 if (reg->so == so) { 6755 IPSECLOG(LOG_DEBUG, "socket exists already.\n"); 6756 mutex_exit(&key_misc.lock); 6757 kmem_free(newreg, sizeof(*newreg)); 6758 return key_senderror(so, m, EEXIST); 6759 } 6760 } 6761 6762 newreg->so = so; 6763 ((struct keycb *)sotorawcb(so))->kp_registered++; 6764 6765 /* add regnode to key_misc.reglist. */ 6766 LIST_INSERT_HEAD(&key_misc.reglist[mhp->msg->sadb_msg_satype], newreg, chain); 6767 mutex_exit(&key_misc.lock); 6768 6769 setmsg: 6770 { 6771 struct mbuf *n; 6772 struct sadb_supported *sup; 6773 u_int len, alen, elen; 6774 int off; 6775 int i; 6776 struct sadb_alg *alg; 6777 6778 /* create new sadb_msg to reply. */ 6779 alen = 0; 6780 for (i = 1; i <= SADB_AALG_MAX; i++) { 6781 if (ah_algorithm_lookup(i)) 6782 alen += sizeof(struct sadb_alg); 6783 } 6784 if (alen) 6785 alen += sizeof(struct sadb_supported); 6786 elen = 0; 6787 for (i = 1; i <= SADB_EALG_MAX; i++) { 6788 if (esp_algorithm_lookup(i)) 6789 elen += sizeof(struct sadb_alg); 6790 } 6791 if (elen) 6792 elen += sizeof(struct sadb_supported); 6793 6794 len = sizeof(struct sadb_msg) + alen + elen; 6795 6796 if (len > MCLBYTES) 6797 return key_senderror(so, m, ENOBUFS); 6798 6799 MGETHDR(n, M_DONTWAIT, MT_DATA); 6800 if (len > MHLEN) { 6801 MCLGET(n, M_DONTWAIT); 6802 if ((n->m_flags & M_EXT) == 0) { 6803 m_freem(n); 6804 n = NULL; 6805 } 6806 } 6807 if (!n) 6808 return key_senderror(so, m, ENOBUFS); 6809 6810 n->m_pkthdr.len = n->m_len = len; 6811 n->m_next = NULL; 6812 off = 0; 6813 6814 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off); 6815 n = key_fill_replymsg(n, 0); 6816 if (n == NULL) 6817 return key_senderror(so, m, ENOBUFS); 6818 6819 off += PFKEY_ALIGN8(sizeof(struct sadb_msg)); 6820 6821 /* for authentication algorithm */ 6822 if (alen) { 6823 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6824 sup->sadb_supported_len = PFKEY_UNIT64(alen); 6825 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH; 6826 off += PFKEY_ALIGN8(sizeof(*sup)); 6827 6828 for (i = 1; i <= SADB_AALG_MAX; i++) { 6829 const struct auth_hash *aalgo; 6830 u_int16_t minkeysize, maxkeysize; 6831 6832 aalgo = ah_algorithm_lookup(i); 6833 if (!aalgo) 6834 continue; 6835 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6836 alg->sadb_alg_id = i; 6837 alg->sadb_alg_ivlen = 0; 6838 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize); 6839 alg->sadb_alg_minbits = _BITS(minkeysize); 6840 alg->sadb_alg_maxbits = _BITS(maxkeysize); 6841 off += PFKEY_ALIGN8(sizeof(*alg)); 6842 } 6843 } 6844 6845 /* for encryption algorithm */ 6846 if (elen) { 6847 sup = (struct sadb_supported *)(mtod(n, char *) + off); 6848 sup->sadb_supported_len = PFKEY_UNIT64(elen); 6849 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT; 6850 off += PFKEY_ALIGN8(sizeof(*sup)); 6851 6852 for (i = 1; i <= SADB_EALG_MAX; i++) { 6853 const struct enc_xform *ealgo; 6854 6855 ealgo = esp_algorithm_lookup(i); 6856 if (!ealgo) 6857 continue; 6858 alg = (struct sadb_alg *)(mtod(n, char *) + off); 6859 alg->sadb_alg_id = i; 6860 alg->sadb_alg_ivlen = ealgo->blocksize; 6861 alg->sadb_alg_minbits = _BITS(ealgo->minkey); 6862 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey); 6863 off += PFKEY_ALIGN8(sizeof(struct sadb_alg)); 6864 } 6865 } 6866 6867 KASSERTMSG(off == len, "length inconsistency"); 6868 6869 m_freem(m); 6870 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED); 6871 } 6872 } 6873 6874 /* 6875 * free secreg entry registered. 6876 * XXX: I want to do free a socket marked done SADB_RESIGER to socket. 6877 */ 6878 void 6879 key_freereg(struct socket *so) 6880 { 6881 struct secreg *reg; 6882 int i; 6883 6884 KASSERT(!cpu_softintr_p()); 6885 KASSERT(so != NULL); 6886 6887 /* 6888 * check whether existing or not. 6889 * check all type of SA, because there is a potential that 6890 * one socket is registered to multiple type of SA. 6891 */ 6892 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 6893 mutex_enter(&key_misc.lock); 6894 LIST_FOREACH(reg, &key_misc.reglist[i], chain) { 6895 if (reg->so == so) { 6896 LIST_REMOVE(reg, chain); 6897 break; 6898 } 6899 } 6900 mutex_exit(&key_misc.lock); 6901 if (reg != NULL) 6902 kmem_free(reg, sizeof(*reg)); 6903 } 6904 6905 return; 6906 } 6907 6908 /* 6909 * SADB_EXPIRE processing 6910 * send 6911 * <base, SA, SA2, lifetime(C and one of HS), address(SD)> 6912 * to KMD by PF_KEY. 6913 * NOTE: We send only soft lifetime extension. 6914 * 6915 * OUT: 0 : succeed 6916 * others : error number 6917 */ 6918 static int 6919 key_expire(struct secasvar *sav) 6920 { 6921 int s; 6922 int satype; 6923 struct mbuf *result = NULL, *m; 6924 int len; 6925 int error = -1; 6926 struct sadb_lifetime *lt; 6927 6928 /* XXX: Why do we lock ? */ 6929 s = splsoftnet(); /*called from softclock()*/ 6930 6931 KASSERT(sav != NULL); 6932 6933 satype = key_proto2satype(sav->sah->saidx.proto); 6934 KASSERTMSG(satype != 0, "invalid proto is passed"); 6935 6936 /* set msg header */ 6937 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt); 6938 if (!m) { 6939 error = ENOBUFS; 6940 goto fail; 6941 } 6942 result = m; 6943 6944 /* create SA extension */ 6945 m = key_setsadbsa(sav); 6946 if (!m) { 6947 error = ENOBUFS; 6948 goto fail; 6949 } 6950 m_cat(result, m); 6951 6952 /* create SA extension */ 6953 m = key_setsadbxsa2(sav->sah->saidx.mode, 6954 sav->replay ? sav->replay->count : 0, sav->sah->saidx.reqid); 6955 if (!m) { 6956 error = ENOBUFS; 6957 goto fail; 6958 } 6959 m_cat(result, m); 6960 6961 /* create lifetime extension (current and soft) */ 6962 len = PFKEY_ALIGN8(sizeof(*lt)) * 2; 6963 m = key_alloc_mbuf(len); 6964 if (!m || m->m_next) { /*XXX*/ 6965 if (m) 6966 m_freem(m); 6967 error = ENOBUFS; 6968 goto fail; 6969 } 6970 memset(mtod(m, void *), 0, len); 6971 lt = mtod(m, struct sadb_lifetime *); 6972 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime)); 6973 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT; 6974 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations; 6975 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes; 6976 lt->sadb_lifetime_addtime = 6977 time_mono_to_wall(sav->lft_c->sadb_lifetime_addtime); 6978 lt->sadb_lifetime_usetime = 6979 time_mono_to_wall(sav->lft_c->sadb_lifetime_usetime); 6980 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2); 6981 memcpy(lt, sav->lft_s, sizeof(*lt)); 6982 m_cat(result, m); 6983 6984 /* set sadb_address for source */ 6985 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &sav->sah->saidx.src.sa, 6986 FULLMASK, IPSEC_ULPROTO_ANY); 6987 if (!m) { 6988 error = ENOBUFS; 6989 goto fail; 6990 } 6991 m_cat(result, m); 6992 6993 /* set sadb_address for destination */ 6994 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &sav->sah->saidx.dst.sa, 6995 FULLMASK, IPSEC_ULPROTO_ANY); 6996 if (!m) { 6997 error = ENOBUFS; 6998 goto fail; 6999 } 7000 m_cat(result, m); 7001 7002 if ((result->m_flags & M_PKTHDR) == 0) { 7003 error = EINVAL; 7004 goto fail; 7005 } 7006 7007 if (result->m_len < sizeof(struct sadb_msg)) { 7008 result = m_pullup(result, sizeof(struct sadb_msg)); 7009 if (result == NULL) { 7010 error = ENOBUFS; 7011 goto fail; 7012 } 7013 } 7014 7015 result->m_pkthdr.len = 0; 7016 for (m = result; m; m = m->m_next) 7017 result->m_pkthdr.len += m->m_len; 7018 7019 mtod(result, struct sadb_msg *)->sadb_msg_len = 7020 PFKEY_UNIT64(result->m_pkthdr.len); 7021 7022 splx(s); 7023 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED); 7024 7025 fail: 7026 if (result) 7027 m_freem(result); 7028 splx(s); 7029 return error; 7030 } 7031 7032 /* 7033 * SADB_FLUSH processing 7034 * receive 7035 * <base> 7036 * from the ikmpd, and free all entries in secastree. 7037 * and send, 7038 * <base> 7039 * to the ikmpd. 7040 * NOTE: to do is only marking SADB_SASTATE_DEAD. 7041 * 7042 * m will always be freed. 7043 */ 7044 static int 7045 key_api_flush(struct socket *so, struct mbuf *m, 7046 const struct sadb_msghdr *mhp) 7047 { 7048 struct sadb_msg *newmsg; 7049 struct secashead *sah; 7050 struct secasvar *sav; 7051 u_int16_t proto; 7052 u_int8_t state; 7053 7054 /* map satype to proto */ 7055 proto = key_satype2proto(mhp->msg->sadb_msg_satype); 7056 if (proto == 0) { 7057 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7058 return key_senderror(so, m, EINVAL); 7059 } 7060 7061 /* no SATYPE specified, i.e. flushing all SA. */ 7062 SAHLIST_READER_FOREACH(sah) { 7063 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC && 7064 proto != sah->saidx.proto) 7065 continue; 7066 7067 SASTATE_ALIVE_FOREACH(state) { 7068 restart: 7069 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7070 key_sa_chgstate(sav, SADB_SASTATE_DEAD); 7071 KEY_FREESAV(&sav); 7072 goto restart; 7073 } 7074 } 7075 7076 sah->state = SADB_SASTATE_DEAD; 7077 } 7078 7079 if (m->m_len < sizeof(struct sadb_msg) || 7080 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) { 7081 IPSECLOG(LOG_DEBUG, "No more memory.\n"); 7082 return key_senderror(so, m, ENOBUFS); 7083 } 7084 7085 if (m->m_next) 7086 m_freem(m->m_next); 7087 m->m_next = NULL; 7088 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg); 7089 newmsg = mtod(m, struct sadb_msg *); 7090 newmsg->sadb_msg_errno = 0; 7091 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len); 7092 7093 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7094 } 7095 7096 7097 static struct mbuf * 7098 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid) 7099 { 7100 struct secashead *sah; 7101 struct secasvar *sav; 7102 u_int16_t proto; 7103 u_int8_t satype; 7104 u_int8_t state; 7105 int cnt; 7106 struct mbuf *m, *n, *prev; 7107 7108 KASSERT(mutex_owned(&key_sad.lock)); 7109 7110 *lenp = 0; 7111 7112 /* map satype to proto */ 7113 proto = key_satype2proto(req_satype); 7114 if (proto == 0) { 7115 *errorp = EINVAL; 7116 return (NULL); 7117 } 7118 7119 /* count sav entries to be sent to userland. */ 7120 cnt = 0; 7121 SAHLIST_WRITER_FOREACH(sah) { 7122 if (req_satype != SADB_SATYPE_UNSPEC && 7123 proto != sah->saidx.proto) 7124 continue; 7125 7126 SASTATE_ANY_FOREACH(state) { 7127 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7128 cnt++; 7129 } 7130 } 7131 } 7132 7133 if (cnt == 0) { 7134 *errorp = ENOENT; 7135 return (NULL); 7136 } 7137 7138 /* send this to the userland, one at a time. */ 7139 m = NULL; 7140 prev = m; 7141 SAHLIST_WRITER_FOREACH(sah) { 7142 if (req_satype != SADB_SATYPE_UNSPEC && 7143 proto != sah->saidx.proto) 7144 continue; 7145 7146 /* map proto to satype */ 7147 satype = key_proto2satype(sah->saidx.proto); 7148 if (satype == 0) { 7149 m_freem(m); 7150 *errorp = EINVAL; 7151 return (NULL); 7152 } 7153 7154 SASTATE_ANY_FOREACH(state) { 7155 SAVLIST_WRITER_FOREACH(sav, sah, state) { 7156 n = key_setdumpsa(sav, SADB_DUMP, satype, 7157 --cnt, pid); 7158 if (!n) { 7159 m_freem(m); 7160 *errorp = ENOBUFS; 7161 return (NULL); 7162 } 7163 7164 if (!m) 7165 m = n; 7166 else 7167 prev->m_nextpkt = n; 7168 prev = n; 7169 } 7170 } 7171 } 7172 7173 if (!m) { 7174 *errorp = EINVAL; 7175 return (NULL); 7176 } 7177 7178 if ((m->m_flags & M_PKTHDR) != 0) { 7179 m->m_pkthdr.len = 0; 7180 for (n = m; n; n = n->m_next) 7181 m->m_pkthdr.len += n->m_len; 7182 } 7183 7184 *errorp = 0; 7185 return (m); 7186 } 7187 7188 /* 7189 * SADB_DUMP processing 7190 * dump all entries including status of DEAD in SAD. 7191 * receive 7192 * <base> 7193 * from the ikmpd, and dump all secasvar leaves 7194 * and send, 7195 * <base> ..... 7196 * to the ikmpd. 7197 * 7198 * m will always be freed. 7199 */ 7200 static int 7201 key_api_dump(struct socket *so, struct mbuf *m0, 7202 const struct sadb_msghdr *mhp) 7203 { 7204 u_int16_t proto; 7205 u_int8_t satype; 7206 struct mbuf *n; 7207 int error, len, ok; 7208 7209 /* map satype to proto */ 7210 satype = mhp->msg->sadb_msg_satype; 7211 proto = key_satype2proto(satype); 7212 if (proto == 0) { 7213 IPSECLOG(LOG_DEBUG, "invalid satype is passed.\n"); 7214 return key_senderror(so, m0, EINVAL); 7215 } 7216 7217 /* 7218 * If the requestor has insufficient socket-buffer space 7219 * for the entire chain, nobody gets any response to the DUMP. 7220 * XXX For now, only the requestor ever gets anything. 7221 * Moreover, if the requestor has any space at all, they receive 7222 * the entire chain, otherwise the request is refused with ENOBUFS. 7223 */ 7224 if (sbspace(&so->so_rcv) <= 0) { 7225 return key_senderror(so, m0, ENOBUFS); 7226 } 7227 7228 mutex_enter(&key_sad.lock); 7229 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid); 7230 mutex_exit(&key_sad.lock); 7231 7232 if (n == NULL) { 7233 return key_senderror(so, m0, ENOENT); 7234 } 7235 { 7236 uint64_t *ps = PFKEY_STAT_GETREF(); 7237 ps[PFKEY_STAT_IN_TOTAL]++; 7238 ps[PFKEY_STAT_IN_BYTES] += len; 7239 PFKEY_STAT_PUTREF(); 7240 } 7241 7242 /* 7243 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets. 7244 * The requestor receives either the entire chain, or an 7245 * error message with ENOBUFS. 7246 * 7247 * sbappendaddrchain() takes the chain of entries, one 7248 * packet-record per SPD entry, prepends the key_src sockaddr 7249 * to each packet-record, links the sockaddr mbufs into a new 7250 * list of records, then appends the entire resulting 7251 * list to the requesting socket. 7252 */ 7253 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src, n, 7254 SB_PRIO_ONESHOT_OVERFLOW); 7255 7256 if (!ok) { 7257 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM); 7258 m_freem(n); 7259 return key_senderror(so, m0, ENOBUFS); 7260 } 7261 7262 m_freem(m0); 7263 return 0; 7264 } 7265 7266 /* 7267 * SADB_X_PROMISC processing 7268 * 7269 * m will always be freed. 7270 */ 7271 static int 7272 key_api_promisc(struct socket *so, struct mbuf *m, 7273 const struct sadb_msghdr *mhp) 7274 { 7275 int olen; 7276 7277 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7278 7279 if (olen < sizeof(struct sadb_msg)) { 7280 #if 1 7281 return key_senderror(so, m, EINVAL); 7282 #else 7283 m_freem(m); 7284 return 0; 7285 #endif 7286 } else if (olen == sizeof(struct sadb_msg)) { 7287 /* enable/disable promisc mode */ 7288 struct keycb *kp = (struct keycb *)sotorawcb(so); 7289 if (kp == NULL) 7290 return key_senderror(so, m, EINVAL); 7291 mhp->msg->sadb_msg_errno = 0; 7292 switch (mhp->msg->sadb_msg_satype) { 7293 case 0: 7294 case 1: 7295 kp->kp_promisc = mhp->msg->sadb_msg_satype; 7296 break; 7297 default: 7298 return key_senderror(so, m, EINVAL); 7299 } 7300 7301 /* send the original message back to everyone */ 7302 mhp->msg->sadb_msg_errno = 0; 7303 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7304 } else { 7305 /* send packet as is */ 7306 7307 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg))); 7308 7309 /* TODO: if sadb_msg_seq is specified, send to specific pid */ 7310 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL); 7311 } 7312 } 7313 7314 static int (*key_api_typesw[]) (struct socket *, struct mbuf *, 7315 const struct sadb_msghdr *) = { 7316 NULL, /* SADB_RESERVED */ 7317 key_api_getspi, /* SADB_GETSPI */ 7318 key_api_update, /* SADB_UPDATE */ 7319 key_api_add, /* SADB_ADD */ 7320 key_api_delete, /* SADB_DELETE */ 7321 key_api_get, /* SADB_GET */ 7322 key_api_acquire, /* SADB_ACQUIRE */ 7323 key_api_register, /* SADB_REGISTER */ 7324 NULL, /* SADB_EXPIRE */ 7325 key_api_flush, /* SADB_FLUSH */ 7326 key_api_dump, /* SADB_DUMP */ 7327 key_api_promisc, /* SADB_X_PROMISC */ 7328 NULL, /* SADB_X_PCHANGE */ 7329 key_api_spdadd, /* SADB_X_SPDUPDATE */ 7330 key_api_spdadd, /* SADB_X_SPDADD */ 7331 key_api_spddelete, /* SADB_X_SPDDELETE */ 7332 key_api_spdget, /* SADB_X_SPDGET */ 7333 NULL, /* SADB_X_SPDACQUIRE */ 7334 key_api_spddump, /* SADB_X_SPDDUMP */ 7335 key_api_spdflush, /* SADB_X_SPDFLUSH */ 7336 key_api_spdadd, /* SADB_X_SPDSETIDX */ 7337 NULL, /* SADB_X_SPDEXPIRE */ 7338 key_api_spddelete2, /* SADB_X_SPDDELETE2 */ 7339 key_api_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */ 7340 }; 7341 7342 /* 7343 * parse sadb_msg buffer to process PFKEYv2, 7344 * and create a data to response if needed. 7345 * I think to be dealed with mbuf directly. 7346 * IN: 7347 * msgp : pointer to pointer to a received buffer pulluped. 7348 * This is rewrited to response. 7349 * so : pointer to socket. 7350 * OUT: 7351 * length for buffer to send to user process. 7352 */ 7353 int 7354 key_parse(struct mbuf *m, struct socket *so) 7355 { 7356 struct sadb_msg *msg; 7357 struct sadb_msghdr mh; 7358 u_int orglen; 7359 int error; 7360 7361 KASSERT(m != NULL); 7362 KASSERT(so != NULL); 7363 7364 #if 0 /*kdebug_sadb assumes msg in linear buffer*/ 7365 if (KEYDEBUG_ON(KEYDEBUG_KEY_DUMP)) { 7366 IPSECLOG(LOG_DEBUG, "passed sadb_msg\n"); 7367 kdebug_sadb(msg); 7368 } 7369 #endif 7370 7371 if (m->m_len < sizeof(struct sadb_msg)) { 7372 m = m_pullup(m, sizeof(struct sadb_msg)); 7373 if (!m) 7374 return ENOBUFS; 7375 } 7376 msg = mtod(m, struct sadb_msg *); 7377 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len); 7378 7379 if ((m->m_flags & M_PKTHDR) == 0 || 7380 m->m_pkthdr.len != orglen) { 7381 IPSECLOG(LOG_DEBUG, "invalid message length.\n"); 7382 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7383 error = EINVAL; 7384 goto senderror; 7385 } 7386 7387 if (msg->sadb_msg_version != PF_KEY_V2) { 7388 IPSECLOG(LOG_DEBUG, "PF_KEY version %u is mismatched.\n", 7389 msg->sadb_msg_version); 7390 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER); 7391 error = EINVAL; 7392 goto senderror; 7393 } 7394 7395 if (msg->sadb_msg_type > SADB_MAX) { 7396 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7397 msg->sadb_msg_type); 7398 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7399 error = EINVAL; 7400 goto senderror; 7401 } 7402 7403 /* for old-fashioned code - should be nuked */ 7404 if (m->m_pkthdr.len > MCLBYTES) { 7405 m_freem(m); 7406 return ENOBUFS; 7407 } 7408 if (m->m_next) { 7409 struct mbuf *n; 7410 7411 MGETHDR(n, M_DONTWAIT, MT_DATA); 7412 if (n && m->m_pkthdr.len > MHLEN) { 7413 MCLGET(n, M_DONTWAIT); 7414 if ((n->m_flags & M_EXT) == 0) { 7415 m_free(n); 7416 n = NULL; 7417 } 7418 } 7419 if (!n) { 7420 m_freem(m); 7421 return ENOBUFS; 7422 } 7423 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *)); 7424 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len; 7425 n->m_next = NULL; 7426 m_freem(m); 7427 m = n; 7428 } 7429 7430 /* align the mbuf chain so that extensions are in contiguous region. */ 7431 error = key_align(m, &mh); 7432 if (error) 7433 return error; 7434 7435 if (m->m_next) { /*XXX*/ 7436 m_freem(m); 7437 return ENOBUFS; 7438 } 7439 7440 msg = mh.msg; 7441 7442 /* check SA type */ 7443 switch (msg->sadb_msg_satype) { 7444 case SADB_SATYPE_UNSPEC: 7445 switch (msg->sadb_msg_type) { 7446 case SADB_GETSPI: 7447 case SADB_UPDATE: 7448 case SADB_ADD: 7449 case SADB_DELETE: 7450 case SADB_GET: 7451 case SADB_ACQUIRE: 7452 case SADB_EXPIRE: 7453 IPSECLOG(LOG_DEBUG, 7454 "must specify satype when msg type=%u.\n", 7455 msg->sadb_msg_type); 7456 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7457 error = EINVAL; 7458 goto senderror; 7459 } 7460 break; 7461 case SADB_SATYPE_AH: 7462 case SADB_SATYPE_ESP: 7463 case SADB_X_SATYPE_IPCOMP: 7464 case SADB_X_SATYPE_TCPSIGNATURE: 7465 switch (msg->sadb_msg_type) { 7466 case SADB_X_SPDADD: 7467 case SADB_X_SPDDELETE: 7468 case SADB_X_SPDGET: 7469 case SADB_X_SPDDUMP: 7470 case SADB_X_SPDFLUSH: 7471 case SADB_X_SPDSETIDX: 7472 case SADB_X_SPDUPDATE: 7473 case SADB_X_SPDDELETE2: 7474 IPSECLOG(LOG_DEBUG, "illegal satype=%u\n", 7475 msg->sadb_msg_type); 7476 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7477 error = EINVAL; 7478 goto senderror; 7479 } 7480 break; 7481 case SADB_SATYPE_RSVP: 7482 case SADB_SATYPE_OSPFV2: 7483 case SADB_SATYPE_RIPV2: 7484 case SADB_SATYPE_MIP: 7485 IPSECLOG(LOG_DEBUG, "type %u isn't supported.\n", 7486 msg->sadb_msg_satype); 7487 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7488 error = EOPNOTSUPP; 7489 goto senderror; 7490 case 1: /* XXX: What does it do? */ 7491 if (msg->sadb_msg_type == SADB_X_PROMISC) 7492 break; 7493 /*FALLTHROUGH*/ 7494 default: 7495 IPSECLOG(LOG_DEBUG, "invalid type %u is passed.\n", 7496 msg->sadb_msg_satype); 7497 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE); 7498 error = EINVAL; 7499 goto senderror; 7500 } 7501 7502 /* check field of upper layer protocol and address family */ 7503 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL && 7504 mh.ext[SADB_EXT_ADDRESS_DST] != NULL) { 7505 struct sadb_address *src0, *dst0; 7506 u_int plen; 7507 7508 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]); 7509 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]); 7510 7511 /* check upper layer protocol */ 7512 if (src0->sadb_address_proto != dst0->sadb_address_proto) { 7513 IPSECLOG(LOG_DEBUG, "upper layer protocol mismatched.\n"); 7514 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7515 error = EINVAL; 7516 goto senderror; 7517 } 7518 7519 /* check family */ 7520 if (PFKEY_ADDR_SADDR(src0)->sa_family != 7521 PFKEY_ADDR_SADDR(dst0)->sa_family) { 7522 IPSECLOG(LOG_DEBUG, "address family mismatched.\n"); 7523 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7524 error = EINVAL; 7525 goto senderror; 7526 } 7527 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7528 PFKEY_ADDR_SADDR(dst0)->sa_len) { 7529 IPSECLOG(LOG_DEBUG, 7530 "address struct size mismatched.\n"); 7531 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7532 error = EINVAL; 7533 goto senderror; 7534 } 7535 7536 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7537 case AF_INET: 7538 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7539 sizeof(struct sockaddr_in)) { 7540 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7541 error = EINVAL; 7542 goto senderror; 7543 } 7544 break; 7545 case AF_INET6: 7546 if (PFKEY_ADDR_SADDR(src0)->sa_len != 7547 sizeof(struct sockaddr_in6)) { 7548 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7549 error = EINVAL; 7550 goto senderror; 7551 } 7552 break; 7553 default: 7554 IPSECLOG(LOG_DEBUG, "unsupported address family.\n"); 7555 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7556 error = EAFNOSUPPORT; 7557 goto senderror; 7558 } 7559 7560 switch (PFKEY_ADDR_SADDR(src0)->sa_family) { 7561 case AF_INET: 7562 plen = sizeof(struct in_addr) << 3; 7563 break; 7564 case AF_INET6: 7565 plen = sizeof(struct in6_addr) << 3; 7566 break; 7567 default: 7568 plen = 0; /*fool gcc*/ 7569 break; 7570 } 7571 7572 /* check max prefix length */ 7573 if (src0->sadb_address_prefixlen > plen || 7574 dst0->sadb_address_prefixlen > plen) { 7575 IPSECLOG(LOG_DEBUG, "illegal prefixlen.\n"); 7576 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR); 7577 error = EINVAL; 7578 goto senderror; 7579 } 7580 7581 /* 7582 * prefixlen == 0 is valid because there can be a case when 7583 * all addresses are matched. 7584 */ 7585 } 7586 7587 if (msg->sadb_msg_type >= __arraycount(key_api_typesw) || 7588 key_api_typesw[msg->sadb_msg_type] == NULL) { 7589 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE); 7590 error = EINVAL; 7591 goto senderror; 7592 } 7593 7594 return (*key_api_typesw[msg->sadb_msg_type])(so, m, &mh); 7595 7596 senderror: 7597 return key_senderror(so, m, error); 7598 } 7599 7600 static int 7601 key_senderror(struct socket *so, struct mbuf *m, int code) 7602 { 7603 struct sadb_msg *msg; 7604 7605 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7606 7607 msg = mtod(m, struct sadb_msg *); 7608 msg->sadb_msg_errno = code; 7609 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE); 7610 } 7611 7612 /* 7613 * set the pointer to each header into message buffer. 7614 * m will be freed on error. 7615 * XXX larger-than-MCLBYTES extension? 7616 */ 7617 static int 7618 key_align(struct mbuf *m, struct sadb_msghdr *mhp) 7619 { 7620 struct mbuf *n; 7621 struct sadb_ext *ext; 7622 size_t off, end; 7623 int extlen; 7624 int toff; 7625 7626 KASSERT(m != NULL); 7627 KASSERT(mhp != NULL); 7628 KASSERT(m->m_len >= sizeof(struct sadb_msg)); 7629 7630 /* initialize */ 7631 memset(mhp, 0, sizeof(*mhp)); 7632 7633 mhp->msg = mtod(m, struct sadb_msg *); 7634 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */ 7635 7636 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len); 7637 extlen = end; /*just in case extlen is not updated*/ 7638 for (off = sizeof(struct sadb_msg); off < end; off += extlen) { 7639 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff); 7640 if (!n) { 7641 /* m is already freed */ 7642 return ENOBUFS; 7643 } 7644 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7645 7646 /* set pointer */ 7647 switch (ext->sadb_ext_type) { 7648 case SADB_EXT_SA: 7649 case SADB_EXT_ADDRESS_SRC: 7650 case SADB_EXT_ADDRESS_DST: 7651 case SADB_EXT_ADDRESS_PROXY: 7652 case SADB_EXT_LIFETIME_CURRENT: 7653 case SADB_EXT_LIFETIME_HARD: 7654 case SADB_EXT_LIFETIME_SOFT: 7655 case SADB_EXT_KEY_AUTH: 7656 case SADB_EXT_KEY_ENCRYPT: 7657 case SADB_EXT_IDENTITY_SRC: 7658 case SADB_EXT_IDENTITY_DST: 7659 case SADB_EXT_SENSITIVITY: 7660 case SADB_EXT_PROPOSAL: 7661 case SADB_EXT_SUPPORTED_AUTH: 7662 case SADB_EXT_SUPPORTED_ENCRYPT: 7663 case SADB_EXT_SPIRANGE: 7664 case SADB_X_EXT_POLICY: 7665 case SADB_X_EXT_SA2: 7666 case SADB_X_EXT_NAT_T_TYPE: 7667 case SADB_X_EXT_NAT_T_SPORT: 7668 case SADB_X_EXT_NAT_T_DPORT: 7669 case SADB_X_EXT_NAT_T_OAI: 7670 case SADB_X_EXT_NAT_T_OAR: 7671 case SADB_X_EXT_NAT_T_FRAG: 7672 /* duplicate check */ 7673 /* 7674 * XXX Are there duplication payloads of either 7675 * KEY_AUTH or KEY_ENCRYPT ? 7676 */ 7677 if (mhp->ext[ext->sadb_ext_type] != NULL) { 7678 IPSECLOG(LOG_DEBUG, 7679 "duplicate ext_type %u is passed.\n", 7680 ext->sadb_ext_type); 7681 m_freem(m); 7682 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT); 7683 return EINVAL; 7684 } 7685 break; 7686 default: 7687 IPSECLOG(LOG_DEBUG, "invalid ext_type %u is passed.\n", 7688 ext->sadb_ext_type); 7689 m_freem(m); 7690 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE); 7691 return EINVAL; 7692 } 7693 7694 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len); 7695 7696 if (key_validate_ext(ext, extlen)) { 7697 m_freem(m); 7698 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7699 return EINVAL; 7700 } 7701 7702 n = m_pulldown(m, off, extlen, &toff); 7703 if (!n) { 7704 /* m is already freed */ 7705 return ENOBUFS; 7706 } 7707 ext = (struct sadb_ext *)(mtod(n, char *) + toff); 7708 7709 mhp->ext[ext->sadb_ext_type] = ext; 7710 mhp->extoff[ext->sadb_ext_type] = off; 7711 mhp->extlen[ext->sadb_ext_type] = extlen; 7712 } 7713 7714 if (off != end) { 7715 m_freem(m); 7716 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN); 7717 return EINVAL; 7718 } 7719 7720 return 0; 7721 } 7722 7723 static int 7724 key_validate_ext(const struct sadb_ext *ext, int len) 7725 { 7726 const struct sockaddr *sa; 7727 enum { NONE, ADDR } checktype = NONE; 7728 int baselen = 0; 7729 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len); 7730 7731 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len)) 7732 return EINVAL; 7733 7734 /* if it does not match minimum/maximum length, bail */ 7735 if (ext->sadb_ext_type >= __arraycount(minsize) || 7736 ext->sadb_ext_type >= __arraycount(maxsize)) 7737 return EINVAL; 7738 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type]) 7739 return EINVAL; 7740 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type]) 7741 return EINVAL; 7742 7743 /* more checks based on sadb_ext_type XXX need more */ 7744 switch (ext->sadb_ext_type) { 7745 case SADB_EXT_ADDRESS_SRC: 7746 case SADB_EXT_ADDRESS_DST: 7747 case SADB_EXT_ADDRESS_PROXY: 7748 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address)); 7749 checktype = ADDR; 7750 break; 7751 case SADB_EXT_IDENTITY_SRC: 7752 case SADB_EXT_IDENTITY_DST: 7753 if (((const struct sadb_ident *)ext)->sadb_ident_type == 7754 SADB_X_IDENTTYPE_ADDR) { 7755 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident)); 7756 checktype = ADDR; 7757 } else 7758 checktype = NONE; 7759 break; 7760 default: 7761 checktype = NONE; 7762 break; 7763 } 7764 7765 switch (checktype) { 7766 case NONE: 7767 break; 7768 case ADDR: 7769 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen); 7770 if (len < baselen + sal) 7771 return EINVAL; 7772 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len) 7773 return EINVAL; 7774 break; 7775 } 7776 7777 return 0; 7778 } 7779 7780 static int 7781 key_do_init(void) 7782 { 7783 int i, error; 7784 7785 mutex_init(&key_misc.lock, MUTEX_DEFAULT, IPL_NONE); 7786 key_psz = pserialize_create(); 7787 mutex_init(&key_spd.lock, MUTEX_DEFAULT, IPL_NONE); 7788 cv_init(&key_spd.cv, "key_sp"); 7789 mutex_init(&key_sad.lock, MUTEX_DEFAULT, IPL_NONE); 7790 7791 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS); 7792 7793 callout_init(&key_timehandler_ch, 0); 7794 error = workqueue_create(&key_timehandler_wq, "key_timehandler", 7795 key_timehandler_work, NULL, PRI_SOFTNET, IPL_SOFTNET, WQ_MPSAFE); 7796 if (error != 0) 7797 panic("%s: workqueue_create failed (%d)\n", __func__, error); 7798 7799 for (i = 0; i < IPSEC_DIR_MAX; i++) { 7800 PSLIST_INIT(&key_spd.splist[i]); 7801 } 7802 7803 PSLIST_INIT(&key_spd.socksplist); 7804 7805 PSLIST_INIT(&key_sad.sahlist); 7806 7807 for (i = 0; i <= SADB_SATYPE_MAX; i++) { 7808 LIST_INIT(&key_misc.reglist[i]); 7809 } 7810 7811 #ifndef IPSEC_NONBLOCK_ACQUIRE 7812 LIST_INIT(&key_misc.acqlist); 7813 #endif 7814 #ifdef notyet 7815 LIST_INIT(&key_misc.spacqlist); 7816 #endif 7817 7818 /* system default */ 7819 ip4_def_policy.policy = IPSEC_POLICY_NONE; 7820 ip4_def_policy.state = IPSEC_SPSTATE_ALIVE; 7821 localcount_init(&ip4_def_policy.localcount); 7822 7823 #ifdef INET6 7824 ip6_def_policy.policy = IPSEC_POLICY_NONE; 7825 ip6_def_policy.state = IPSEC_SPSTATE_ALIVE; 7826 localcount_init(&ip6_def_policy.localcount); 7827 #endif 7828 7829 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL); 7830 7831 /* initialize key statistics */ 7832 keystat.getspi_count = 1; 7833 7834 aprint_verbose("IPsec: Initialized Security Association Processing.\n"); 7835 7836 return (0); 7837 } 7838 7839 void 7840 key_init(void) 7841 { 7842 static ONCE_DECL(key_init_once); 7843 7844 sysctl_net_keyv2_setup(NULL); 7845 sysctl_net_key_compat_setup(NULL); 7846 7847 RUN_ONCE(&key_init_once, key_do_init); 7848 7849 key_init_so(); 7850 } 7851 7852 /* 7853 * XXX: maybe This function is called after INBOUND IPsec processing. 7854 * 7855 * Special check for tunnel-mode packets. 7856 * We must make some checks for consistency between inner and outer IP header. 7857 * 7858 * xxx more checks to be provided 7859 */ 7860 int 7861 key_checktunnelsanity( 7862 struct secasvar *sav, 7863 u_int family, 7864 void *src, 7865 void *dst 7866 ) 7867 { 7868 7869 /* XXX: check inner IP header */ 7870 7871 return 1; 7872 } 7873 7874 #if 0 7875 #define hostnamelen strlen(hostname) 7876 7877 /* 7878 * Get FQDN for the host. 7879 * If the administrator configured hostname (by hostname(1)) without 7880 * domain name, returns nothing. 7881 */ 7882 static const char * 7883 key_getfqdn(void) 7884 { 7885 int i; 7886 int hasdot; 7887 static char fqdn[MAXHOSTNAMELEN + 1]; 7888 7889 if (!hostnamelen) 7890 return NULL; 7891 7892 /* check if it comes with domain name. */ 7893 hasdot = 0; 7894 for (i = 0; i < hostnamelen; i++) { 7895 if (hostname[i] == '.') 7896 hasdot++; 7897 } 7898 if (!hasdot) 7899 return NULL; 7900 7901 /* NOTE: hostname may not be NUL-terminated. */ 7902 memset(fqdn, 0, sizeof(fqdn)); 7903 memcpy(fqdn, hostname, hostnamelen); 7904 fqdn[hostnamelen] = '\0'; 7905 return fqdn; 7906 } 7907 7908 /* 7909 * get username@FQDN for the host/user. 7910 */ 7911 static const char * 7912 key_getuserfqdn(void) 7913 { 7914 const char *host; 7915 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2]; 7916 struct proc *p = curproc; 7917 char *q; 7918 7919 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session) 7920 return NULL; 7921 if (!(host = key_getfqdn())) 7922 return NULL; 7923 7924 /* NOTE: s_login may not be-NUL terminated. */ 7925 memset(userfqdn, 0, sizeof(userfqdn)); 7926 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME); 7927 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */ 7928 q = userfqdn + strlen(userfqdn); 7929 *q++ = '@'; 7930 memcpy(q, host, strlen(host)); 7931 q += strlen(host); 7932 *q++ = '\0'; 7933 7934 return userfqdn; 7935 } 7936 #endif 7937 7938 /* record data transfer on SA, and update timestamps */ 7939 void 7940 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m) 7941 { 7942 7943 KASSERT(sav != NULL); 7944 KASSERT(sav->lft_c != NULL); 7945 KASSERT(m != NULL); 7946 7947 /* 7948 * XXX Currently, there is a difference of bytes size 7949 * between inbound and outbound processing. 7950 */ 7951 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len; 7952 /* to check bytes lifetime is done in key_timehandler(). */ 7953 7954 /* 7955 * We use the number of packets as the unit of 7956 * sadb_lifetime_allocations. We increment the variable 7957 * whenever {esp,ah}_{in,out}put is called. 7958 */ 7959 sav->lft_c->sadb_lifetime_allocations++; 7960 /* XXX check for expires? */ 7961 7962 /* 7963 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock, 7964 * in seconds. HARD and SOFT lifetime are measured by the time 7965 * difference (again in seconds) from sadb_lifetime_usetime. 7966 * 7967 * usetime 7968 * v expire expire 7969 * -----+-----+--------+---> t 7970 * <--------------> HARD 7971 * <-----> SOFT 7972 */ 7973 sav->lft_c->sadb_lifetime_usetime = time_uptime; 7974 /* XXX check for expires? */ 7975 7976 return; 7977 } 7978 7979 /* dumb version */ 7980 void 7981 key_sa_routechange(struct sockaddr *dst) 7982 { 7983 struct secashead *sah; 7984 struct route *ro; 7985 const struct sockaddr *sa; 7986 7987 SAHLIST_READER_FOREACH(sah) { 7988 ro = &sah->sa_route; 7989 sa = rtcache_getdst(ro); 7990 if (sa != NULL && dst->sa_len == sa->sa_len && 7991 memcmp(dst, sa, dst->sa_len) == 0) 7992 rtcache_free(ro); 7993 } 7994 7995 return; 7996 } 7997 7998 static void 7999 key_sa_chgstate(struct secasvar *sav, u_int8_t state) 8000 { 8001 struct secasvar *_sav; 8002 8003 KASSERT(sav != NULL); 8004 8005 if (sav->state == state) 8006 return; 8007 8008 SAVLIST_WRITER_REMOVE(sav); 8009 SAVLIST_ENTRY_DESTROY(sav); 8010 SAVLIST_ENTRY_INIT(sav); 8011 8012 sav->state = state; 8013 if (!SADB_SASTATE_USABLE_P(sav)) { 8014 /* We don't need to care about the order */ 8015 SAVLIST_WRITER_INSERT_HEAD(sav->sah, state, sav); 8016 return; 8017 } 8018 /* 8019 * Sort the list by lft_c->sadb_lifetime_addtime 8020 * in ascending order. 8021 */ 8022 SAVLIST_READER_FOREACH(_sav, sav->sah, state) { 8023 if (_sav->lft_c->sadb_lifetime_addtime > 8024 sav->lft_c->sadb_lifetime_addtime) { 8025 SAVLIST_WRITER_INSERT_BEFORE(_sav, sav); 8026 break; 8027 } 8028 } 8029 if (_sav == NULL) { 8030 SAVLIST_WRITER_INSERT_TAIL(sav->sah, state, sav); 8031 } 8032 key_validate_savlist(sav->sah, state); 8033 } 8034 8035 /* XXX too much? */ 8036 static struct mbuf * 8037 key_alloc_mbuf(int l) 8038 { 8039 struct mbuf *m = NULL, *n; 8040 int len, t; 8041 8042 len = l; 8043 while (len > 0) { 8044 MGET(n, M_DONTWAIT, MT_DATA); 8045 if (n && len > MLEN) 8046 MCLGET(n, M_DONTWAIT); 8047 if (!n) { 8048 m_freem(m); 8049 return NULL; 8050 } 8051 8052 n->m_next = NULL; 8053 n->m_len = 0; 8054 n->m_len = M_TRAILINGSPACE(n); 8055 /* use the bottom of mbuf, hoping we can prepend afterwards */ 8056 if (n->m_len > len) { 8057 t = (n->m_len - len) & ~(sizeof(long) - 1); 8058 n->m_data += t; 8059 n->m_len = len; 8060 } 8061 8062 len -= n->m_len; 8063 8064 if (m) 8065 m_cat(m, n); 8066 else 8067 m = n; 8068 } 8069 8070 return m; 8071 } 8072 8073 static struct mbuf * 8074 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid) 8075 { 8076 struct secashead *sah; 8077 struct secasvar *sav; 8078 u_int16_t proto; 8079 u_int8_t satype; 8080 u_int8_t state; 8081 int cnt; 8082 struct mbuf *m, *n; 8083 8084 KASSERT(mutex_owned(&key_sad.lock)); 8085 8086 /* map satype to proto */ 8087 proto = key_satype2proto(req_satype); 8088 if (proto == 0) { 8089 *errorp = EINVAL; 8090 return (NULL); 8091 } 8092 8093 /* count sav entries to be sent to the userland. */ 8094 cnt = 0; 8095 SAHLIST_WRITER_FOREACH(sah) { 8096 if (req_satype != SADB_SATYPE_UNSPEC && 8097 proto != sah->saidx.proto) 8098 continue; 8099 8100 SASTATE_ANY_FOREACH(state) { 8101 SAVLIST_WRITER_FOREACH(sav, sah, state) { 8102 cnt++; 8103 } 8104 } 8105 } 8106 8107 if (cnt == 0) { 8108 *errorp = ENOENT; 8109 return (NULL); 8110 } 8111 8112 /* send this to the userland, one at a time. */ 8113 m = NULL; 8114 SAHLIST_WRITER_FOREACH(sah) { 8115 if (req_satype != SADB_SATYPE_UNSPEC && 8116 proto != sah->saidx.proto) 8117 continue; 8118 8119 /* map proto to satype */ 8120 satype = key_proto2satype(sah->saidx.proto); 8121 if (satype == 0) { 8122 m_freem(m); 8123 *errorp = EINVAL; 8124 return (NULL); 8125 } 8126 8127 SASTATE_ANY_FOREACH(state) { 8128 SAVLIST_WRITER_FOREACH(sav, sah, state) { 8129 n = key_setdumpsa(sav, SADB_DUMP, satype, 8130 --cnt, pid); 8131 if (!n) { 8132 m_freem(m); 8133 *errorp = ENOBUFS; 8134 return (NULL); 8135 } 8136 8137 if (!m) 8138 m = n; 8139 else 8140 m_cat(m, n); 8141 } 8142 } 8143 } 8144 8145 if (!m) { 8146 *errorp = EINVAL; 8147 return (NULL); 8148 } 8149 8150 if ((m->m_flags & M_PKTHDR) != 0) { 8151 m->m_pkthdr.len = 0; 8152 for (n = m; n; n = n->m_next) 8153 m->m_pkthdr.len += n->m_len; 8154 } 8155 8156 *errorp = 0; 8157 return (m); 8158 } 8159 8160 static struct mbuf * 8161 key_setspddump(int *errorp, pid_t pid) 8162 { 8163 struct secpolicy *sp; 8164 int cnt; 8165 u_int dir; 8166 struct mbuf *m, *n; 8167 8168 KASSERT(mutex_owned(&key_spd.lock)); 8169 8170 /* search SPD entry and get buffer size. */ 8171 cnt = 0; 8172 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8173 SPLIST_WRITER_FOREACH(sp, dir) { 8174 cnt++; 8175 } 8176 } 8177 8178 if (cnt == 0) { 8179 *errorp = ENOENT; 8180 return (NULL); 8181 } 8182 8183 m = NULL; 8184 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) { 8185 SPLIST_WRITER_FOREACH(sp, dir) { 8186 --cnt; 8187 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid); 8188 8189 if (!n) { 8190 *errorp = ENOBUFS; 8191 m_freem(m); 8192 return (NULL); 8193 } 8194 if (!m) 8195 m = n; 8196 else { 8197 m->m_pkthdr.len += n->m_pkthdr.len; 8198 m_cat(m, n); 8199 } 8200 } 8201 } 8202 8203 *errorp = 0; 8204 return (m); 8205 } 8206 8207 int 8208 key_get_used(void) { 8209 return !SPLIST_READER_EMPTY(IPSEC_DIR_INBOUND) || 8210 !SPLIST_READER_EMPTY(IPSEC_DIR_OUTBOUND) || 8211 !SOCKSPLIST_READER_EMPTY(); 8212 } 8213 8214 void 8215 key_update_used(void) 8216 { 8217 switch (ipsec_enabled) { 8218 default: 8219 case 0: 8220 #ifdef notyet 8221 /* XXX: racy */ 8222 ipsec_used = 0; 8223 #endif 8224 break; 8225 case 1: 8226 #ifndef notyet 8227 /* XXX: racy */ 8228 if (!ipsec_used) 8229 #endif 8230 ipsec_used = key_get_used(); 8231 break; 8232 case 2: 8233 ipsec_used = 1; 8234 break; 8235 } 8236 } 8237 8238 static int 8239 sysctl_net_key_dumpsa(SYSCTLFN_ARGS) 8240 { 8241 struct mbuf *m, *n; 8242 int err2 = 0; 8243 char *p, *ep; 8244 size_t len; 8245 int error; 8246 8247 if (newp) 8248 return (EPERM); 8249 if (namelen != 1) 8250 return (EINVAL); 8251 8252 mutex_enter(&key_sad.lock); 8253 m = key_setdump(name[0], &error, l->l_proc->p_pid); 8254 mutex_exit(&key_sad.lock); 8255 if (!m) 8256 return (error); 8257 if (!oldp) 8258 *oldlenp = m->m_pkthdr.len; 8259 else { 8260 p = oldp; 8261 if (*oldlenp < m->m_pkthdr.len) { 8262 err2 = ENOMEM; 8263 ep = p + *oldlenp; 8264 } else { 8265 *oldlenp = m->m_pkthdr.len; 8266 ep = p + m->m_pkthdr.len; 8267 } 8268 for (n = m; n; n = n->m_next) { 8269 len = (ep - p < n->m_len) ? 8270 ep - p : n->m_len; 8271 error = copyout(mtod(n, const void *), p, len); 8272 p += len; 8273 if (error) 8274 break; 8275 } 8276 if (error == 0) 8277 error = err2; 8278 } 8279 m_freem(m); 8280 8281 return (error); 8282 } 8283 8284 static int 8285 sysctl_net_key_dumpsp(SYSCTLFN_ARGS) 8286 { 8287 struct mbuf *m, *n; 8288 int err2 = 0; 8289 char *p, *ep; 8290 size_t len; 8291 int error; 8292 8293 if (newp) 8294 return (EPERM); 8295 if (namelen != 0) 8296 return (EINVAL); 8297 8298 mutex_enter(&key_spd.lock); 8299 m = key_setspddump(&error, l->l_proc->p_pid); 8300 mutex_exit(&key_spd.lock); 8301 if (!m) 8302 return (error); 8303 if (!oldp) 8304 *oldlenp = m->m_pkthdr.len; 8305 else { 8306 p = oldp; 8307 if (*oldlenp < m->m_pkthdr.len) { 8308 err2 = ENOMEM; 8309 ep = p + *oldlenp; 8310 } else { 8311 *oldlenp = m->m_pkthdr.len; 8312 ep = p + m->m_pkthdr.len; 8313 } 8314 for (n = m; n; n = n->m_next) { 8315 len = (ep - p < n->m_len) ? ep - p : n->m_len; 8316 error = copyout(mtod(n, const void *), p, len); 8317 p += len; 8318 if (error) 8319 break; 8320 } 8321 if (error == 0) 8322 error = err2; 8323 } 8324 m_freem(m); 8325 8326 return (error); 8327 } 8328 8329 /* 8330 * Create sysctl tree for native IPSEC key knobs, originally 8331 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }. 8332 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 }; 8333 * and in any case the part of our sysctl namespace used for dumping the 8334 * SPD and SA database *HAS* to be compatible with the KAME sysctl 8335 * namespace, for API reasons. 8336 * 8337 * Pending a consensus on the right way to fix this, add a level of 8338 * indirection in how we number the `native' IPSEC key nodes; 8339 * and (as requested by Andrew Brown) move registration of the 8340 * KAME-compatible names to a separate function. 8341 */ 8342 #if 0 8343 # define IPSEC_PFKEY PF_KEY_V2 8344 # define IPSEC_PFKEY_NAME "keyv2" 8345 #else 8346 # define IPSEC_PFKEY PF_KEY 8347 # define IPSEC_PFKEY_NAME "key" 8348 #endif 8349 8350 static int 8351 sysctl_net_key_stats(SYSCTLFN_ARGS) 8352 { 8353 8354 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS)); 8355 } 8356 8357 static void 8358 sysctl_net_keyv2_setup(struct sysctllog **clog) 8359 { 8360 8361 sysctl_createv(clog, 0, NULL, NULL, 8362 CTLFLAG_PERMANENT, 8363 CTLTYPE_NODE, IPSEC_PFKEY_NAME, NULL, 8364 NULL, 0, NULL, 0, 8365 CTL_NET, IPSEC_PFKEY, CTL_EOL); 8366 8367 sysctl_createv(clog, 0, NULL, NULL, 8368 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8369 CTLTYPE_INT, "debug", NULL, 8370 NULL, 0, &key_debug_level, 0, 8371 CTL_NET, IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL); 8372 sysctl_createv(clog, 0, NULL, NULL, 8373 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8374 CTLTYPE_INT, "spi_try", NULL, 8375 NULL, 0, &key_spi_trycnt, 0, 8376 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL); 8377 sysctl_createv(clog, 0, NULL, NULL, 8378 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8379 CTLTYPE_INT, "spi_min_value", NULL, 8380 NULL, 0, &key_spi_minval, 0, 8381 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL); 8382 sysctl_createv(clog, 0, NULL, NULL, 8383 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8384 CTLTYPE_INT, "spi_max_value", NULL, 8385 NULL, 0, &key_spi_maxval, 0, 8386 CTL_NET, IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL); 8387 sysctl_createv(clog, 0, NULL, NULL, 8388 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8389 CTLTYPE_INT, "random_int", NULL, 8390 NULL, 0, &key_int_random, 0, 8391 CTL_NET, IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL); 8392 sysctl_createv(clog, 0, NULL, NULL, 8393 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8394 CTLTYPE_INT, "larval_lifetime", NULL, 8395 NULL, 0, &key_larval_lifetime, 0, 8396 CTL_NET, IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL); 8397 sysctl_createv(clog, 0, NULL, NULL, 8398 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8399 CTLTYPE_INT, "blockacq_count", NULL, 8400 NULL, 0, &key_blockacq_count, 0, 8401 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL); 8402 sysctl_createv(clog, 0, NULL, NULL, 8403 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8404 CTLTYPE_INT, "blockacq_lifetime", NULL, 8405 NULL, 0, &key_blockacq_lifetime, 0, 8406 CTL_NET, IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL); 8407 sysctl_createv(clog, 0, NULL, NULL, 8408 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8409 CTLTYPE_INT, "esp_keymin", NULL, 8410 NULL, 0, &ipsec_esp_keymin, 0, 8411 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL); 8412 sysctl_createv(clog, 0, NULL, NULL, 8413 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8414 CTLTYPE_INT, "prefered_oldsa", NULL, 8415 NULL, 0, &key_prefered_oldsa, 0, 8416 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL); 8417 sysctl_createv(clog, 0, NULL, NULL, 8418 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8419 CTLTYPE_INT, "esp_auth", NULL, 8420 NULL, 0, &ipsec_esp_auth, 0, 8421 CTL_NET, IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL); 8422 sysctl_createv(clog, 0, NULL, NULL, 8423 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 8424 CTLTYPE_INT, "ah_keymin", NULL, 8425 NULL, 0, &ipsec_ah_keymin, 0, 8426 CTL_NET, IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL); 8427 sysctl_createv(clog, 0, NULL, NULL, 8428 CTLFLAG_PERMANENT, 8429 CTLTYPE_STRUCT, "stats", 8430 SYSCTL_DESCR("PF_KEY statistics"), 8431 sysctl_net_key_stats, 0, NULL, 0, 8432 CTL_NET, IPSEC_PFKEY, CTL_CREATE, CTL_EOL); 8433 } 8434 8435 /* 8436 * Register sysctl names used by setkey(8). For historical reasons, 8437 * and to share a single API, these names appear under { CTL_NET, PF_KEY } 8438 * for both IPSEC and KAME IPSEC. 8439 */ 8440 static void 8441 sysctl_net_key_compat_setup(struct sysctllog **clog) 8442 { 8443 8444 sysctl_createv(clog, 0, NULL, NULL, 8445 CTLFLAG_PERMANENT, 8446 CTLTYPE_NODE, "key", NULL, 8447 NULL, 0, NULL, 0, 8448 CTL_NET, PF_KEY, CTL_EOL); 8449 8450 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */ 8451 sysctl_createv(clog, 0, NULL, NULL, 8452 CTLFLAG_PERMANENT, 8453 CTLTYPE_STRUCT, "dumpsa", NULL, 8454 sysctl_net_key_dumpsa, 0, NULL, 0, 8455 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL); 8456 sysctl_createv(clog, 0, NULL, NULL, 8457 CTLFLAG_PERMANENT, 8458 CTLTYPE_STRUCT, "dumpsp", NULL, 8459 sysctl_net_key_dumpsp, 0, NULL, 0, 8460 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL); 8461 } 8462
Indexes created Mon Sep 22 10:09:38 GMT 2025