ieee80211_crypto.c revision 179396
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 179396 2008-05-28 23:33:29Z 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, const 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 const 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) { 338again: 339 /* 340 * Fillin the flags so cipher modules can see s/w 341 * crypto requirements and potentially allocate 342 * different state and/or attach different method 343 * pointers. 344 * 345 * XXX this is not right when s/w crypto fallback 346 * fails and we try to restore previous state. 347 */ 348 key->wk_flags = flags; 349 keyctx = cip->ic_attach(vap, key); 350 if (keyctx == NULL) { 351 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 352 "%s: unable to attach cipher %s\n", 353 __func__, cip->ic_name); 354 key->wk_flags = oflags; /* restore old flags */ 355 vap->iv_stats.is_crypto_attachfail++; 356 return 0; 357 } 358 cipher_detach(key); 359 key->wk_cipher = cip; /* XXX refcnt? */ 360 key->wk_private = keyctx; 361 } 362 /* 363 * Commit to requested usage so driver can see the flags. 364 */ 365 key->wk_flags = flags; 366 367 /* 368 * Ask the driver for a key index if we don't have one. 369 * Note that entries in the global key table always have 370 * an index; this means it's safe to call this routine 371 * for these entries just to setup the reference to the 372 * cipher template. Note also that when using software 373 * crypto we also call the driver to give us a key index. 374 */ 375 if (key->wk_keyix == IEEE80211_KEYIX_NONE) { 376 if (!dev_key_alloc(vap, key, &keyix, &rxkeyix)) { 377 /* 378 * Driver has no room; fallback to doing crypto 379 * in the host. We change the flags and start the 380 * procedure over. If we get back here then there's 381 * no hope and we bail. Note that this can leave 382 * the key in a inconsistent state if the caller 383 * continues to use it. 384 */ 385 if ((key->wk_flags & IEEE80211_KEY_SWCRYPT) == 0) { 386 vap->iv_stats.is_crypto_swfallback++; 387 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 388 "%s: no h/w resources for cipher %s, " 389 "falling back to s/w\n", __func__, 390 cip->ic_name); 391 oflags = key->wk_flags; 392 flags |= IEEE80211_KEY_SWCRYPT; 393 if (cipher == IEEE80211_CIPHER_TKIP) 394 flags |= IEEE80211_KEY_SWMIC; 395 goto again; 396 } 397 vap->iv_stats.is_crypto_keyfail++; 398 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 399 "%s: unable to setup cipher %s\n", 400 __func__, cip->ic_name); 401 return 0; 402 } 403 key->wk_keyix = keyix; 404 key->wk_rxkeyix = rxkeyix; 405 } 406 return 1; 407} 408 409/* 410 * Remove the key (no locking, for internal use). 411 */ 412static int 413_ieee80211_crypto_delkey(struct ieee80211vap *vap, struct ieee80211_key *key) 414{ 415 ieee80211_keyix keyix; 416 417 KASSERT(key->wk_cipher != NULL, ("No cipher!")); 418 419 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 420 "%s: %s keyix %u flags 0x%x rsc %ju tsc %ju len %u\n", 421 __func__, key->wk_cipher->ic_name, 422 key->wk_keyix, key->wk_flags, 423 key->wk_keyrsc[IEEE80211_NONQOS_TID], key->wk_keytsc, 424 key->wk_keylen); 425 426 keyix = key->wk_keyix; 427 if (keyix != IEEE80211_KEYIX_NONE) { 428 /* 429 * Remove hardware entry. 430 */ 431 /* XXX key cache */ 432 if (!dev_key_delete(vap, key)) { 433 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 434 "%s: driver did not delete key index %u\n", 435 __func__, keyix); 436 vap->iv_stats.is_crypto_delkey++; 437 /* XXX recovery? */ 438 } 439 } 440 cipher_detach(key); 441 memset(key, 0, sizeof(*key)); 442 ieee80211_crypto_resetkey(vap, key, IEEE80211_KEYIX_NONE); 443 return 1; 444} 445 446/* 447 * Remove the specified key. 448 */ 449int 450ieee80211_crypto_delkey(struct ieee80211vap *vap, struct ieee80211_key *key) 451{ 452 int status; 453 454 ieee80211_key_update_begin(vap); 455 status = _ieee80211_crypto_delkey(vap, key); 456 ieee80211_key_update_end(vap); 457 return status; 458} 459 460/* 461 * Clear the global key table. 462 */ 463void 464ieee80211_crypto_delglobalkeys(struct ieee80211vap *vap) 465{ 466 int i; 467 468 ieee80211_key_update_begin(vap); 469 for (i = 0; i < IEEE80211_WEP_NKID; i++) 470 (void) _ieee80211_crypto_delkey(vap, &vap->iv_nw_keys[i]); 471 ieee80211_key_update_end(vap); 472} 473 474/* 475 * Set the contents of the specified key. 476 * 477 * Locking must be handled by the caller using: 478 * ieee80211_key_update_begin(vap); 479 * ieee80211_key_update_end(vap); 480 */ 481int 482ieee80211_crypto_setkey(struct ieee80211vap *vap, struct ieee80211_key *key) 483{ 484 const struct ieee80211_cipher *cip = key->wk_cipher; 485 486 KASSERT(cip != NULL, ("No cipher!")); 487 488 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 489 "%s: %s keyix %u flags 0x%x mac %s rsc %ju tsc %ju len %u\n", 490 __func__, cip->ic_name, key->wk_keyix, 491 key->wk_flags, ether_sprintf(key->wk_macaddr), 492 key->wk_keyrsc[IEEE80211_NONQOS_TID], key->wk_keytsc, 493 key->wk_keylen); 494 495 /* 496 * Give cipher a chance to validate key contents. 497 * XXX should happen before modifying state. 498 */ 499 if (!cip->ic_setkey(key)) { 500 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 501 "%s: cipher %s rejected key index %u len %u flags 0x%x\n", 502 __func__, cip->ic_name, key->wk_keyix, 503 key->wk_keylen, key->wk_flags); 504 vap->iv_stats.is_crypto_setkey_cipher++; 505 return 0; 506 } 507 if (key->wk_keyix == IEEE80211_KEYIX_NONE) { 508 /* XXX nothing allocated, should not happen */ 509 IEEE80211_DPRINTF(vap, IEEE80211_MSG_CRYPTO, 510 "%s: no key index; should not happen!\n", __func__); 511 vap->iv_stats.is_crypto_setkey_nokey++; 512 return 0; 513 } 514 return dev_key_set(vap, key); 515} 516 517/* 518 * Add privacy headers appropriate for the specified key. 519 */ 520struct ieee80211_key * 521ieee80211_crypto_encap(struct ieee80211_node *ni, struct mbuf *m) 522{ 523 struct ieee80211vap *vap = ni->ni_vap; 524 struct ieee80211_key *k; 525 struct ieee80211_frame *wh; 526 const struct ieee80211_cipher *cip; 527 uint8_t keyid; 528 529 /* 530 * Multicast traffic always uses the multicast key. 531 * Otherwise if a unicast key is set we use that and 532 * it is always key index 0. When no unicast key is 533 * set we fall back to the default transmit key. 534 */ 535 wh = mtod(m, struct ieee80211_frame *); 536 if (IEEE80211_IS_MULTICAST(wh->i_addr1) || 537 IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 538 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE) { 539 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, 540 wh->i_addr1, 541 "no default transmit key (%s) deftxkey %u", 542 __func__, vap->iv_def_txkey); 543 vap->iv_stats.is_tx_nodefkey++; 544 return NULL; 545 } 546 keyid = vap->iv_def_txkey; 547 k = &vap->iv_nw_keys[vap->iv_def_txkey]; 548 } else { 549 keyid = 0; 550 k = &ni->ni_ucastkey; 551 } 552 cip = k->wk_cipher; 553 return (cip->ic_encap(k, m, keyid<<6) ? k : NULL); 554} 555 556/* 557 * Validate and strip privacy headers (and trailer) for a 558 * received frame that has the WEP/Privacy bit set. 559 */ 560struct ieee80211_key * 561ieee80211_crypto_decap(struct ieee80211_node *ni, struct mbuf *m, int hdrlen) 562{ 563#define IEEE80211_WEP_HDRLEN (IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN) 564#define IEEE80211_WEP_MINLEN \ 565 (sizeof(struct ieee80211_frame) + \ 566 IEEE80211_WEP_HDRLEN + IEEE80211_WEP_CRCLEN) 567 struct ieee80211vap *vap = ni->ni_vap; 568 struct ieee80211_key *k; 569 struct ieee80211_frame *wh; 570 const struct ieee80211_cipher *cip; 571 uint8_t keyid; 572 573 /* NB: this minimum size data frame could be bigger */ 574 if (m->m_pkthdr.len < IEEE80211_WEP_MINLEN) { 575 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 576 "%s: WEP data frame too short, len %u\n", 577 __func__, m->m_pkthdr.len); 578 vap->iv_stats.is_rx_tooshort++; /* XXX need unique stat? */ 579 return NULL; 580 } 581 582 /* 583 * Locate the key. If unicast and there is no unicast 584 * key then we fall back to the key id in the header. 585 * This assumes unicast keys are only configured when 586 * the key id in the header is meaningless (typically 0). 587 */ 588 wh = mtod(m, struct ieee80211_frame *); 589 m_copydata(m, hdrlen + IEEE80211_WEP_IVLEN, sizeof(keyid), &keyid); 590 if (IEEE80211_IS_MULTICAST(wh->i_addr1) || 591 IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) 592 k = &vap->iv_nw_keys[keyid >> 6]; 593 else 594 k = &ni->ni_ucastkey; 595 596 /* 597 * Insure crypto header is contiguous for all decap work. 598 */ 599 cip = k->wk_cipher; 600 if (m->m_len < hdrlen + cip->ic_header && 601 (m = m_pullup(m, hdrlen + cip->ic_header)) == NULL) { 602 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 603 "unable to pullup %s header", cip->ic_name); 604 vap->iv_stats.is_rx_wepfail++; /* XXX */ 605 return NULL; 606 } 607 608 return (cip->ic_decap(k, m, hdrlen) ? k : NULL); 609#undef IEEE80211_WEP_MINLEN 610#undef IEEE80211_WEP_HDRLEN 611} 612 613static void 614load_ucastkey(void *arg, struct ieee80211_node *ni) 615{ 616 struct ieee80211vap *vap = ni->ni_vap; 617 struct ieee80211_key *k; 618 619 if (vap->iv_state != IEEE80211_S_RUN) 620 return; 621 k = &ni->ni_ucastkey; 622 if (k->wk_keyix != IEEE80211_KEYIX_NONE) 623 dev_key_set(vap, k); 624} 625 626/* 627 * Re-load all keys known to the 802.11 layer that may 628 * have hardware state backing them. This is used by 629 * drivers on resume to push keys down into the device. 630 */ 631void 632ieee80211_crypto_reload_keys(struct ieee80211com *ic) 633{ 634 struct ieee80211vap *vap; 635 int i; 636 637 /* 638 * Keys in the global key table of each vap. 639 */ 640 /* NB: used only during resume so don't lock for now */ 641 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 642 if (vap->iv_state != IEEE80211_S_RUN) 643 continue; 644 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 645 const struct ieee80211_key *k = &vap->iv_nw_keys[i]; 646 if (k->wk_keyix != IEEE80211_KEYIX_NONE) 647 dev_key_set(vap, k); 648 } 649 } 650 /* 651 * Unicast keys. 652 */ 653 ieee80211_iterate_nodes(&ic->ic_sta, load_ucastkey, NULL); 654} 655