ieee80211_crypto.c revision 183248
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_crypto.c 183248 2008-09-21 23:16:19Z sam $"); 29 30/* 31 * IEEE 802.11 generic crypto support. 32 */ 33#include "opt_wlan.h" 34 35#include <sys/param.h> 36#include <sys/kernel.h> 37#include <sys/malloc.h> 38#include <sys/mbuf.h> 39 40#include <sys/socket.h> 41 42#include <net/if.h> 43#include <net/if_media.h> 44#include <net/ethernet.h> /* XXX ETHER_HDR_LEN */ 45 46#include <net80211/ieee80211_var.h> 47 48MALLOC_DEFINE(M_80211_CRYPTO, "80211crypto", "802.11 crypto state"); 49 50static int _ieee80211_crypto_delkey(struct ieee80211vap *, 51 struct ieee80211_key *); 52 53/* 54 * Table of registered cipher modules. 55 */ 56static const struct ieee80211_cipher *ciphers[IEEE80211_CIPHER_MAX]; 57 58/* 59 * Default "null" key management routines. 60 */ 61static int 62null_key_alloc(struct ieee80211vap *vap, struct ieee80211_key *k, 63 ieee80211_keyix *keyix, ieee80211_keyix *rxkeyix) 64{ 65 if (!(&vap->iv_nw_keys[0] <= k && 66 k < &vap->iv_nw_keys[IEEE80211_WEP_NKID])) { 67 /* 68 * Not in the global key table, the driver should handle this 69 * by allocating a slot in the h/w key table/cache. In 70 * lieu of that return key slot 0 for any unicast key 71 * request. We disallow the request if this is a group key. 72 * This default policy does the right thing for legacy hardware 73 * with a 4 key table. It also handles devices that pass 74 * packets through untouched when marked with the WEP bit 75 * and key index 0. 76 */ 77 if (k->wk_flags & IEEE80211_KEY_GROUP) 78 return 0; 79 *keyix = 0; /* NB: use key index 0 for ucast key */ 80 } else { 81 *keyix = k - vap->iv_nw_keys; 82 } 83 *rxkeyix = IEEE80211_KEYIX_NONE; /* XXX maybe *keyix? */ 84 return 1; 85} 86static int 87null_key_delete(struct ieee80211vap *vap, const struct ieee80211_key *k) 88{ 89 return 1; 90} 91static int 92null_key_set(struct ieee80211vap *vap, const struct ieee80211_key *k, 93 const uint8_t mac[IEEE80211_ADDR_LEN]) 94{ 95 return 1; 96} 97static void null_key_update(struct ieee80211vap *vap) {} 98 99/* 100 * Write-arounds for common operations. 101 */ 102static __inline void 103cipher_detach(struct ieee80211_key *key) 104{ 105 key->wk_cipher->ic_detach(key); 106} 107 108static __inline void * 109cipher_attach(struct ieee80211vap *vap, struct ieee80211_key *key) 110{ 111 return key->wk_cipher->ic_attach(vap, key); 112} 113 114/* 115 * Wrappers for driver key management methods. 116 */ 117static __inline int 118dev_key_alloc(struct ieee80211vap *vap, 119 struct ieee80211_key *key, 120 ieee80211_keyix *keyix, ieee80211_keyix *rxkeyix) 121{ 122 return vap->iv_key_alloc(vap, key, keyix, rxkeyix); 123} 124 125static __inline int 126dev_key_delete(struct ieee80211vap *vap, 127 const struct ieee80211_key *key) 128{ 129 return vap->iv_key_delete(vap, key); 130} 131 132static __inline int 133dev_key_set(struct ieee80211vap *vap, const struct ieee80211_key *key) 134{ 135 return vap->iv_key_set(vap, key, key->wk_macaddr); 136} 137 138/* 139 * Setup crypto support for a device/shared instance. 140 */ 141void 142ieee80211_crypto_attach(struct ieee80211com *ic) 143{ 144 /* NB: we assume everything is pre-zero'd */ 145 ciphers[IEEE80211_CIPHER_NONE] = &ieee80211_cipher_none; 146} 147 148/* 149 * Teardown crypto support. 150 */ 151void 152ieee80211_crypto_detach(struct ieee80211com *ic) 153{ 154} 155 156/* 157 * Setup crypto support for a vap. 158 */ 159void 160ieee80211_crypto_vattach(struct ieee80211vap *vap) 161{ 162 int i; 163 164 /* NB: we assume everything is pre-zero'd */ 165 vap->iv_max_keyix = IEEE80211_WEP_NKID; 166 vap->iv_def_txkey = IEEE80211_KEYIX_NONE; 167 for (i = 0; i < IEEE80211_WEP_NKID; i++) 168 ieee80211_crypto_resetkey(vap, &vap->iv_nw_keys[i], 169 IEEE80211_KEYIX_NONE); 170 /* 171 * Initialize the driver key support routines to noop entries. 172 * This is useful especially for the cipher test modules. 173 */ 174 vap->iv_key_alloc = null_key_alloc; 175 vap->iv_key_set = null_key_set; 176 vap->iv_key_delete = null_key_delete; 177 vap->iv_key_update_begin = null_key_update; 178 vap->iv_key_update_end = null_key_update; 179} 180 181/* 182 * Teardown crypto support for a vap. 183 */ 184void 185ieee80211_crypto_vdetach(struct ieee80211vap *vap) 186{ 187 ieee80211_crypto_delglobalkeys(vap); 188} 189 190/* 191 * Register a crypto cipher module. 192 */ 193void 194ieee80211_crypto_register(const struct ieee80211_cipher *cip) 195{ 196 if (cip->ic_cipher >= IEEE80211_CIPHER_MAX) { 197 printf("%s: cipher %s has an invalid cipher index %u\n", 198 __func__, cip->ic_name, cip->ic_cipher); 199 return; 200 } 201 if (ciphers[cip->ic_cipher] != NULL && ciphers[cip->ic_cipher] != cip) { 202 printf("%s: cipher %s registered with a different template\n", 203 __func__, cip->ic_name); 204 return; 205 } 206 ciphers[cip->ic_cipher] = cip; 207} 208 209/* 210 * Unregister a crypto cipher module. 211 */ 212void 213ieee80211_crypto_unregister(const struct ieee80211_cipher *cip) 214{ 215 if (cip->ic_cipher >= IEEE80211_CIPHER_MAX) { 216 printf("%s: cipher %s has an invalid cipher index %u\n", 217 __func__, cip->ic_name, cip->ic_cipher); 218 return; 219 } 220 if (ciphers[cip->ic_cipher] != NULL && ciphers[cip->ic_cipher] != cip) { 221 printf("%s: cipher %s registered with a different template\n", 222 __func__, cip->ic_name); 223 return; 224 } 225 /* NB: don't complain about not being registered */ 226 /* XXX disallow if references */ 227 ciphers[cip->ic_cipher] = NULL; 228} 229 230int 231ieee80211_crypto_available(u_int cipher) 232{ 233 return cipher < IEEE80211_CIPHER_MAX && ciphers[cipher] != NULL; 234} 235 236/* XXX well-known names! */ 237static const char *cipher_modnames[IEEE80211_CIPHER_MAX] = { 238 "wlan_wep", /* IEEE80211_CIPHER_WEP */ 239 "wlan_tkip", /* IEEE80211_CIPHER_TKIP */ 240 "wlan_aes_ocb", /* IEEE80211_CIPHER_AES_OCB */ 241 "wlan_ccmp", /* IEEE80211_CIPHER_AES_CCM */ 242 "#4", /* reserved */ 243 "wlan_ckip", /* IEEE80211_CIPHER_CKIP */ 244 "wlan_none", /* IEEE80211_CIPHER_NONE */ 245}; 246 247/* 248 * Establish a relationship between the specified key and cipher 249 * and, if necessary, allocate a hardware index from the driver. 250 * Note that when a fixed key index is required it must be specified 251 * and we blindly assign it w/o consulting the driver (XXX). 252 * 253 * This must be the first call applied to a key; all the other key 254 * routines assume wk_cipher is setup. 255 * 256 * Locking must be handled by the caller using: 257 * ieee80211_key_update_begin(vap); 258 * ieee80211_key_update_end(vap); 259 */ 260int 261ieee80211_crypto_newkey(struct ieee80211vap *vap, 262 int cipher, int flags, struct ieee80211_key *key) 263{ 264 struct ieee80211com *ic = vap->iv_ic; 265 const struct ieee80211_cipher *cip; 266 ieee80211_keyix keyix, rxkeyix; 267 void *keyctx; 268 int oflags; 269 270 /* 271 * Validate cipher and set reference to cipher routines. 272 */ 273 if (cipher >= IEEE80211_CIPHER_MAX) { 274 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 275 "%s: invalid cipher %u\n", __func__, cipher); 276 vap->iv_stats.is_crypto_badcipher++; 277 return 0; 278 } 279 cip = ciphers[cipher]; 280 if (cip == NULL) { 281 /* 282 * Auto-load cipher module if we have a well-known name 283 * for it. It might be better to use string names rather 284 * than numbers and craft a module name based on the cipher 285 * name; e.g. wlan_cipher_<cipher-name>. 286 */ 287 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 288 "%s: unregistered cipher %u, load module %s\n", 289 __func__, cipher, cipher_modnames[cipher]); 290 ieee80211_load_module(cipher_modnames[cipher]); 291 /* 292 * If cipher module loaded it should immediately 293 * call ieee80211_crypto_register which will fill 294 * in the entry in the ciphers array. 295 */ 296 cip = ciphers[cipher]; 297 if (cip == NULL) { 298 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 299 "%s: unable to load cipher %u, module %s\n", 300 __func__, cipher, cipher_modnames[cipher]); 301 vap->iv_stats.is_crypto_nocipher++; 302 return 0; 303 } 304 } 305 306 oflags = key->wk_flags; 307 flags &= IEEE80211_KEY_COMMON; 308 /* 309 * If the hardware does not support the cipher then 310 * fallback to a host-based implementation. 311 */ 312 if ((ic->ic_cryptocaps & (1<<cipher)) == 0) { 313 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 314 "%s: no h/w support for cipher %s, falling back to s/w\n", 315 __func__, cip->ic_name); 316 flags |= IEEE80211_KEY_SWCRYPT; 317 } 318 /* 319 * Hardware TKIP with software MIC is an important 320 * combination; we handle it by flagging each key, 321 * the cipher modules honor it. 322 */ 323 if (cipher == IEEE80211_CIPHER_TKIP && 324 (ic->ic_cryptocaps & IEEE80211_CRYPTO_TKIPMIC) == 0) { 325 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 326 "%s: no h/w support for TKIP MIC, falling back to s/w\n", 327 __func__); 328 flags |= IEEE80211_KEY_SWMIC; 329 } 330 331 /* 332 * Bind cipher to key instance. Note we do this 333 * after checking the device capabilities so the 334 * cipher module can optimize space usage based on 335 * whether or not it needs to do the cipher work. 336 */ 337 if (key->wk_cipher != cip || key->wk_flags != flags) { 338 /* 339 * Fillin the flags so cipher modules can see s/w 340 * crypto requirements and potentially allocate 341 * different state and/or attach different method 342 * pointers. 343 */ 344 key->wk_flags = flags; 345 keyctx = cip->ic_attach(vap, key); 346 if (keyctx == NULL) { 347 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 348 "%s: unable to attach cipher %s\n", 349 __func__, cip->ic_name); 350 key->wk_flags = oflags; /* restore old flags */ 351 vap->iv_stats.is_crypto_attachfail++; 352 return 0; 353 } 354 cipher_detach(key); 355 key->wk_cipher = cip; /* XXX refcnt? */ 356 key->wk_private = keyctx; 357 } 358 /* 359 * Commit to requested usage so driver can see the flags. 360 */ 361 key->wk_flags = flags; 362 363 /* 364 * Ask the driver for a key index if we don't have one. 365 * Note that entries in the global key table always have 366 * an index; this means it's safe to call this routine 367 * for these entries just to setup the reference to the 368 * cipher template. Note also that when using software 369 * crypto we also call the driver to give us a key index. 370 */ 371 if ((key->wk_flags & IEEE80211_KEY_DEVKEY) == 0) { 372 if (!dev_key_alloc(vap, key, &keyix, &rxkeyix)) { 373 /* 374 * Unable to setup driver state. 375 */ 376 vap->iv_stats.is_crypto_keyfail++; 377 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 378 "%s: unable to setup cipher %s\n", 379 __func__, cip->ic_name); 380 return 0; 381 } 382 if (key->wk_flags != flags) { 383 /* 384 * Driver overrode flags we setup; typically because 385 * resources were unavailable to handle _this_ key. 386 * Re-attach the cipher context to allow cipher 387 * modules to handle differing requirements. 388 */ 389 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 390 "%s: driver override for cipher %s, flags " 391 "0x%x -> 0x%x\n", __func__, cip->ic_name, 392 oflags, key->wk_flags); 393 keyctx = cip->ic_attach(vap, key); 394 if (keyctx == NULL) { 395 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 396 "%s: unable to attach cipher %s with " 397 "flags 0x%x\n", __func__, cip->ic_name, 398 key->wk_flags); 399 key->wk_flags = oflags; /* restore old flags */ 400 vap->iv_stats.is_crypto_attachfail++; 401 return 0; 402 } 403 cipher_detach(key); 404 key->wk_cipher = cip; /* XXX refcnt? */ 405 key->wk_private = keyctx; 406 } 407 key->wk_keyix = keyix; 408 key->wk_rxkeyix = rxkeyix; 409 key->wk_flags |= IEEE80211_KEY_DEVKEY; 410 } 411 return 1; 412} 413 414/* 415 * Remove the key (no locking, for internal use). 416 */ 417static int 418_ieee80211_crypto_delkey(struct ieee80211vap *vap, struct ieee80211_key *key) 419{ 420 KASSERT(key->wk_cipher != NULL, ("No cipher!")); 421 422 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 423 "%s: %s keyix %u flags 0x%x rsc %ju tsc %ju len %u\n", 424 __func__, key->wk_cipher->ic_name, 425 key->wk_keyix, key->wk_flags, 426 key->wk_keyrsc[IEEE80211_NONQOS_TID], key->wk_keytsc, 427 key->wk_keylen); 428 429 if (key->wk_flags & IEEE80211_KEY_DEVKEY) { 430 /* 431 * Remove hardware entry. 432 */ 433 /* XXX key cache */ 434 if (!dev_key_delete(vap, key)) { 435 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 436 "%s: driver did not delete key index %u\n", 437 __func__, key->wk_keyix); 438 vap->iv_stats.is_crypto_delkey++; 439 /* XXX recovery? */ 440 } 441 } 442 cipher_detach(key); 443 memset(key, 0, sizeof(*key)); 444 ieee80211_crypto_resetkey(vap, key, IEEE80211_KEYIX_NONE); 445 return 1; 446} 447 448/* 449 * Remove the specified key. 450 */ 451int 452ieee80211_crypto_delkey(struct ieee80211vap *vap, struct ieee80211_key *key) 453{ 454 int status; 455 456 ieee80211_key_update_begin(vap); 457 status = _ieee80211_crypto_delkey(vap, key); 458 ieee80211_key_update_end(vap); 459 return status; 460} 461 462/* 463 * Clear the global key table. 464 */ 465void 466ieee80211_crypto_delglobalkeys(struct ieee80211vap *vap) 467{ 468 int i; 469 470 ieee80211_key_update_begin(vap); 471 for (i = 0; i < IEEE80211_WEP_NKID; i++) 472 (void) _ieee80211_crypto_delkey(vap, &vap->iv_nw_keys[i]); 473 ieee80211_key_update_end(vap); 474} 475 476/* 477 * Set the contents of the specified key. 478 * 479 * Locking must be handled by the caller using: 480 * ieee80211_key_update_begin(vap); 481 * ieee80211_key_update_end(vap); 482 */ 483int 484ieee80211_crypto_setkey(struct ieee80211vap *vap, struct ieee80211_key *key) 485{ 486 const struct ieee80211_cipher *cip = key->wk_cipher; 487 488 KASSERT(cip != NULL, ("No cipher!")); 489 490 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 491 "%s: %s keyix %u flags 0x%x mac %s rsc %ju tsc %ju len %u\n", 492 __func__, cip->ic_name, key->wk_keyix, 493 key->wk_flags, ether_sprintf(key->wk_macaddr), 494 key->wk_keyrsc[IEEE80211_NONQOS_TID], key->wk_keytsc, 495 key->wk_keylen); 496 497 if ((key->wk_flags & IEEE80211_KEY_DEVKEY) == 0) { 498 /* XXX nothing allocated, should not happen */ 499 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 500 "%s: no device key setup done; should not happen!\n", 501 __func__); 502 vap->iv_stats.is_crypto_setkey_nokey++; 503 return 0; 504 } 505 /* 506 * Give cipher a chance to validate key contents. 507 * XXX should happen before modifying state. 508 */ 509 if (!cip->ic_setkey(key)) { 510 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 511 "%s: cipher %s rejected key index %u len %u flags 0x%x\n", 512 __func__, cip->ic_name, key->wk_keyix, 513 key->wk_keylen, key->wk_flags); 514 vap->iv_stats.is_crypto_setkey_cipher++; 515 return 0; 516 } 517 return dev_key_set(vap, key); 518} 519 520/* 521 * Add privacy headers appropriate for the specified key. 522 */ 523struct ieee80211_key * 524ieee80211_crypto_encap(struct ieee80211_node *ni, struct mbuf *m) 525{ 526 struct ieee80211vap *vap = ni->ni_vap; 527 struct ieee80211_key *k; 528 struct ieee80211_frame *wh; 529 const struct ieee80211_cipher *cip; 530 uint8_t keyid; 531 532 /* 533 * Multicast traffic always uses the multicast key. 534 * Otherwise if a unicast key is set we use that and 535 * it is always key index 0. When no unicast key is 536 * set we fall back to the default transmit key. 537 */ 538 wh = mtod(m, struct ieee80211_frame *); 539 if (IEEE80211_IS_MULTICAST(wh->i_addr1) || 540 IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 541 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE) { 542 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 543 wh->i_addr1, 544 "no default transmit key (%s) deftxkey %u", 545 __func__, vap->iv_def_txkey); 546 vap->iv_stats.is_tx_nodefkey++; 547 return NULL; 548 } 549 keyid = vap->iv_def_txkey; 550 k = &vap->iv_nw_keys[vap->iv_def_txkey]; 551 } else { 552 keyid = 0; 553 k = &ni->ni_ucastkey; 554 } 555 cip = k->wk_cipher; 556 return (cip->ic_encap(k, m, keyid<<6) ? k : NULL); 557} 558 559/* 560 * Validate and strip privacy headers (and trailer) for a 561 * received frame that has the WEP/Privacy bit set. 562 */ 563struct ieee80211_key * 564ieee80211_crypto_decap(struct ieee80211_node *ni, struct mbuf *m, int hdrlen) 565{ 566#define IEEE80211_WEP_HDRLEN (IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN) 567#define IEEE80211_WEP_MINLEN \ 568 (sizeof(struct ieee80211_frame) + \ 569 IEEE80211_WEP_HDRLEN + IEEE80211_WEP_CRCLEN) 570 struct ieee80211vap *vap = ni->ni_vap; 571 struct ieee80211_key *k; 572 struct ieee80211_frame *wh; 573 const struct ieee80211_cipher *cip; 574 uint8_t keyid; 575 576 /* NB: this minimum size data frame could be bigger */ 577 if (m->m_pkthdr.len < IEEE80211_WEP_MINLEN) { 578 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 579 "%s: WEP data frame too short, len %u\n", 580 __func__, m->m_pkthdr.len); 581 vap->iv_stats.is_rx_tooshort++; /* XXX need unique stat? */ 582 return NULL; 583 } 584 585 /* 586 * Locate the key. If unicast and there is no unicast 587 * key then we fall back to the key id in the header. 588 * This assumes unicast keys are only configured when 589 * the key id in the header is meaningless (typically 0). 590 */ 591 wh = mtod(m, struct ieee80211_frame *); 592 m_copydata(m, hdrlen + IEEE80211_WEP_IVLEN, sizeof(keyid), &keyid); 593 if (IEEE80211_IS_MULTICAST(wh->i_addr1) || 594 IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) 595 k = &vap->iv_nw_keys[keyid >> 6]; 596 else 597 k = &ni->ni_ucastkey; 598 599 /* 600 * Insure crypto header is contiguous for all decap work. 601 */ 602 cip = k->wk_cipher; 603 if (m->m_len < hdrlen + cip->ic_header && 604 (m = m_pullup(m, hdrlen + cip->ic_header)) == NULL) { 605 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 606 "unable to pullup %s header", cip->ic_name); 607 vap->iv_stats.is_rx_wepfail++; /* XXX */ 608 return NULL; 609 } 610 611 return (cip->ic_decap(k, m, hdrlen) ? k : NULL); 612#undef IEEE80211_WEP_MINLEN 613#undef IEEE80211_WEP_HDRLEN 614} 615 616static void 617load_ucastkey(void *arg, struct ieee80211_node *ni) 618{ 619 struct ieee80211vap *vap = ni->ni_vap; 620 struct ieee80211_key *k; 621 622 if (vap->iv_state != IEEE80211_S_RUN) 623 return; 624 k = &ni->ni_ucastkey; 625 if (k->wk_flags & IEEE80211_KEY_DEVKEY) 626 dev_key_set(vap, k); 627} 628 629/* 630 * Re-load all keys known to the 802.11 layer that may 631 * have hardware state backing them. This is used by 632 * drivers on resume to push keys down into the device. 633 */ 634void 635ieee80211_crypto_reload_keys(struct ieee80211com *ic) 636{ 637 struct ieee80211vap *vap; 638 int i; 639 640 /* 641 * Keys in the global key table of each vap. 642 */ 643 /* NB: used only during resume so don't lock for now */ 644 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 645 if (vap->iv_state != IEEE80211_S_RUN) 646 continue; 647 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 648 const struct ieee80211_key *k = &vap->iv_nw_keys[i]; 649 if (k->wk_flags & IEEE80211_KEY_DEVKEY) 650 dev_key_set(vap, k); 651 } 652 } 653 /* 654 * Unicast keys. 655 */ 656 ieee80211_iterate_nodes(&ic->ic_sta, load_ucastkey, NULL); 657} 658