1 /* 2 * WPA Supplicant - RSN PMKSA cache 3 * Copyright (c) 2004-2009, 2011-2015, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "common.h" 12 #include "eloop.h" 13 #include "eapol_supp/eapol_supp_sm.h" 14 #include "wpa.h" 15 #include "wpa_i.h" 16 #include "pmksa_cache.h" 17 18 #if defined(IEEE8021X_EAPOL) && !defined(CONFIG_NO_WPA) 19 20 static const int pmksa_cache_max_entries = 32; 21 22 struct rsn_pmksa_cache { 23 struct rsn_pmksa_cache_entry *pmksa; /* PMKSA cache */ 24 int pmksa_count; /* number of entries in PMKSA cache */ 25 struct wpa_sm *sm; /* TODO: get rid of this reference(?) */ 26 27 void (*free_cb)(struct rsn_pmksa_cache_entry *entry, void *ctx, 28 enum pmksa_free_reason reason); 29 void *ctx; 30 }; 31 32 33 static void pmksa_cache_set_expiration(struct rsn_pmksa_cache *pmksa); 34 35 36 static void _pmksa_cache_free_entry(struct rsn_pmksa_cache_entry *entry) 37 { 38 bin_clear_free(entry, sizeof(*entry)); 39 } 40 41 42 static void pmksa_cache_free_entry(struct rsn_pmksa_cache *pmksa, 43 struct rsn_pmksa_cache_entry *entry, 44 enum pmksa_free_reason reason) 45 { 46 wpa_sm_remove_pmkid(pmksa->sm, entry->network_ctx, entry->aa, 47 entry->pmkid, 48 entry->fils_cache_id_set ? entry->fils_cache_id : 49 NULL); 50 pmksa->pmksa_count--; 51 pmksa->free_cb(entry, pmksa->ctx, reason); 52 _pmksa_cache_free_entry(entry); 53 } 54 55 56 static void pmksa_cache_expire(void *eloop_ctx, void *timeout_ctx) 57 { 58 struct rsn_pmksa_cache *pmksa = eloop_ctx; 59 struct os_reltime now; 60 61 os_get_reltime(&now); 62 while (pmksa->pmksa && pmksa->pmksa->expiration <= now.sec) { 63 struct rsn_pmksa_cache_entry *entry = pmksa->pmksa; 64 pmksa->pmksa = entry->next; 65 wpa_printf(MSG_DEBUG, "RSN: expired PMKSA cache entry for " 66 MACSTR, MAC2STR(entry->aa)); 67 pmksa_cache_free_entry(pmksa, entry, PMKSA_EXPIRE); 68 } 69 70 pmksa_cache_set_expiration(pmksa); 71 } 72 73 74 static void pmksa_cache_reauth(void *eloop_ctx, void *timeout_ctx) 75 { 76 struct rsn_pmksa_cache *pmksa = eloop_ctx; 77 pmksa->sm->cur_pmksa = NULL; 78 eapol_sm_request_reauth(pmksa->sm->eapol); 79 } 80 81 82 static void pmksa_cache_set_expiration(struct rsn_pmksa_cache *pmksa) 83 { 84 int sec; 85 struct rsn_pmksa_cache_entry *entry; 86 struct os_reltime now; 87 88 eloop_cancel_timeout(pmksa_cache_expire, pmksa, NULL); 89 eloop_cancel_timeout(pmksa_cache_reauth, pmksa, NULL); 90 if (pmksa->pmksa == NULL) 91 return; 92 os_get_reltime(&now); 93 sec = pmksa->pmksa->expiration - now.sec; 94 if (sec < 0) 95 sec = 0; 96 eloop_register_timeout(sec + 1, 0, pmksa_cache_expire, pmksa, NULL); 97 98 entry = pmksa->sm->cur_pmksa ? pmksa->sm->cur_pmksa : 99 pmksa_cache_get(pmksa, pmksa->sm->bssid, NULL, NULL); 100 if (entry) { 101 sec = pmksa->pmksa->reauth_time - now.sec; 102 if (sec < 0) 103 sec = 0; 104 eloop_register_timeout(sec, 0, pmksa_cache_reauth, pmksa, 105 NULL); 106 } 107 } 108 109 110 /** 111 * pmksa_cache_add - Add a PMKSA cache entry 112 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 113 * @pmk: The new pairwise master key 114 * @pmk_len: PMK length in bytes, usually PMK_LEN (32) 115 * @pmkid: Calculated PMKID 116 * @kck: Key confirmation key or %NULL if not yet derived 117 * @kck_len: KCK length in bytes 118 * @aa: Authenticator address 119 * @spa: Supplicant address 120 * @network_ctx: Network configuration context for this PMK 121 * @akmp: WPA_KEY_MGMT_* used in key derivation 122 * @cache_id: Pointer to FILS Cache Identifier or %NULL if not advertised 123 * Returns: Pointer to the added PMKSA cache entry or %NULL on error 124 * 125 * This function create a PMKSA entry for a new PMK and adds it to the PMKSA 126 * cache. If an old entry is already in the cache for the same Authenticator, 127 * this entry will be replaced with the new entry. PMKID will be calculated 128 * based on the PMK and the driver interface is notified of the new PMKID. 129 */ 130 struct rsn_pmksa_cache_entry * 131 pmksa_cache_add(struct rsn_pmksa_cache *pmksa, const u8 *pmk, size_t pmk_len, 132 const u8 *pmkid, const u8 *kck, size_t kck_len, 133 const u8 *aa, const u8 *spa, void *network_ctx, int akmp, 134 const u8 *cache_id) 135 { 136 struct rsn_pmksa_cache_entry *entry; 137 struct os_reltime now; 138 139 if (pmk_len > PMK_LEN_MAX) 140 return NULL; 141 142 if (wpa_key_mgmt_suite_b(akmp) && !kck) 143 return NULL; 144 145 entry = os_zalloc(sizeof(*entry)); 146 if (entry == NULL) 147 return NULL; 148 os_memcpy(entry->pmk, pmk, pmk_len); 149 entry->pmk_len = pmk_len; 150 if (pmkid) 151 os_memcpy(entry->pmkid, pmkid, PMKID_LEN); 152 else if (akmp == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) 153 rsn_pmkid_suite_b_192(kck, kck_len, aa, spa, entry->pmkid); 154 else if (wpa_key_mgmt_suite_b(akmp)) 155 rsn_pmkid_suite_b(kck, kck_len, aa, spa, entry->pmkid); 156 else 157 rsn_pmkid(pmk, pmk_len, aa, spa, entry->pmkid, akmp); 158 os_get_reltime(&now); 159 entry->expiration = now.sec + pmksa->sm->dot11RSNAConfigPMKLifetime; 160 entry->reauth_time = now.sec + pmksa->sm->dot11RSNAConfigPMKLifetime * 161 pmksa->sm->dot11RSNAConfigPMKReauthThreshold / 100; 162 entry->akmp = akmp; 163 if (cache_id) { 164 entry->fils_cache_id_set = 1; 165 os_memcpy(entry->fils_cache_id, cache_id, FILS_CACHE_ID_LEN); 166 } 167 os_memcpy(entry->aa, aa, ETH_ALEN); 168 entry->network_ctx = network_ctx; 169 170 return pmksa_cache_add_entry(pmksa, entry); 171 } 172 173 174 struct rsn_pmksa_cache_entry * 175 pmksa_cache_add_entry(struct rsn_pmksa_cache *pmksa, 176 struct rsn_pmksa_cache_entry *entry) 177 { 178 struct rsn_pmksa_cache_entry *pos, *prev; 179 180 /* Replace an old entry for the same Authenticator (if found) with the 181 * new entry */ 182 pos = pmksa->pmksa; 183 prev = NULL; 184 while (pos) { 185 if (os_memcmp(entry->aa, pos->aa, ETH_ALEN) == 0) { 186 if (pos->pmk_len == entry->pmk_len && 187 os_memcmp_const(pos->pmk, entry->pmk, 188 entry->pmk_len) == 0 && 189 os_memcmp_const(pos->pmkid, entry->pmkid, 190 PMKID_LEN) == 0) { 191 wpa_printf(MSG_DEBUG, "WPA: reusing previous " 192 "PMKSA entry"); 193 os_free(entry); 194 return pos; 195 } 196 if (prev == NULL) 197 pmksa->pmksa = pos->next; 198 else 199 prev->next = pos->next; 200 201 /* 202 * If OKC is used, there may be other PMKSA cache 203 * entries based on the same PMK. These needs to be 204 * flushed so that a new entry can be created based on 205 * the new PMK. Only clear other entries if they have a 206 * matching PMK and this PMK has been used successfully 207 * with the current AP, i.e., if opportunistic flag has 208 * been cleared in wpa_supplicant_key_neg_complete(). 209 */ 210 wpa_printf(MSG_DEBUG, "RSN: Replace PMKSA entry for " 211 "the current AP and any PMKSA cache entry " 212 "that was based on the old PMK"); 213 if (!pos->opportunistic) 214 pmksa_cache_flush(pmksa, entry->network_ctx, 215 pos->pmk, pos->pmk_len); 216 pmksa_cache_free_entry(pmksa, pos, PMKSA_REPLACE); 217 break; 218 } 219 prev = pos; 220 pos = pos->next; 221 } 222 223 if (pmksa->pmksa_count >= pmksa_cache_max_entries && pmksa->pmksa) { 224 /* Remove the oldest entry to make room for the new entry */ 225 pos = pmksa->pmksa; 226 227 if (pos == pmksa->sm->cur_pmksa) { 228 /* 229 * Never remove the current PMKSA cache entry, since 230 * it's in use, and removing it triggers a needless 231 * deauthentication. 232 */ 233 pos = pos->next; 234 pmksa->pmksa->next = pos ? pos->next : NULL; 235 } else 236 pmksa->pmksa = pos->next; 237 238 if (pos) { 239 wpa_printf(MSG_DEBUG, "RSN: removed the oldest idle " 240 "PMKSA cache entry (for " MACSTR ") to " 241 "make room for new one", 242 MAC2STR(pos->aa)); 243 pmksa_cache_free_entry(pmksa, pos, PMKSA_FREE); 244 } 245 } 246 247 /* Add the new entry; order by expiration time */ 248 pos = pmksa->pmksa; 249 prev = NULL; 250 while (pos) { 251 if (pos->expiration > entry->expiration) 252 break; 253 prev = pos; 254 pos = pos->next; 255 } 256 if (prev == NULL) { 257 entry->next = pmksa->pmksa; 258 pmksa->pmksa = entry; 259 pmksa_cache_set_expiration(pmksa); 260 } else { 261 entry->next = prev->next; 262 prev->next = entry; 263 } 264 pmksa->pmksa_count++; 265 wpa_printf(MSG_DEBUG, "RSN: Added PMKSA cache entry for " MACSTR 266 " network_ctx=%p", MAC2STR(entry->aa), entry->network_ctx); 267 wpa_sm_add_pmkid(pmksa->sm, entry->network_ctx, entry->aa, entry->pmkid, 268 entry->fils_cache_id_set ? entry->fils_cache_id : NULL, 269 entry->pmk, entry->pmk_len); 270 271 return entry; 272 } 273 274 275 /** 276 * pmksa_cache_flush - Flush PMKSA cache entries for a specific network 277 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 278 * @network_ctx: Network configuration context or %NULL to flush all entries 279 * @pmk: PMK to match for or %NYLL to match all PMKs 280 * @pmk_len: PMK length 281 */ 282 void pmksa_cache_flush(struct rsn_pmksa_cache *pmksa, void *network_ctx, 283 const u8 *pmk, size_t pmk_len) 284 { 285 struct rsn_pmksa_cache_entry *entry, *prev = NULL, *tmp; 286 int removed = 0; 287 288 entry = pmksa->pmksa; 289 while (entry) { 290 if ((entry->network_ctx == network_ctx || 291 network_ctx == NULL) && 292 (pmk == NULL || 293 (pmk_len == entry->pmk_len && 294 os_memcmp(pmk, entry->pmk, pmk_len) == 0))) { 295 wpa_printf(MSG_DEBUG, "RSN: Flush PMKSA cache entry " 296 "for " MACSTR, MAC2STR(entry->aa)); 297 if (prev) 298 prev->next = entry->next; 299 else 300 pmksa->pmksa = entry->next; 301 tmp = entry; 302 entry = entry->next; 303 pmksa_cache_free_entry(pmksa, tmp, PMKSA_FREE); 304 removed++; 305 } else { 306 prev = entry; 307 entry = entry->next; 308 } 309 } 310 if (removed) 311 pmksa_cache_set_expiration(pmksa); 312 } 313 314 315 /** 316 * pmksa_cache_deinit - Free all entries in PMKSA cache 317 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 318 */ 319 void pmksa_cache_deinit(struct rsn_pmksa_cache *pmksa) 320 { 321 struct rsn_pmksa_cache_entry *entry, *prev; 322 323 if (pmksa == NULL) 324 return; 325 326 entry = pmksa->pmksa; 327 pmksa->pmksa = NULL; 328 while (entry) { 329 prev = entry; 330 entry = entry->next; 331 os_free(prev); 332 } 333 pmksa_cache_set_expiration(pmksa); 334 os_free(pmksa); 335 } 336 337 338 /** 339 * pmksa_cache_get - Fetch a PMKSA cache entry 340 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 341 * @aa: Authenticator address or %NULL to match any 342 * @pmkid: PMKID or %NULL to match any 343 * @network_ctx: Network context or %NULL to match any 344 * Returns: Pointer to PMKSA cache entry or %NULL if no match was found 345 */ 346 struct rsn_pmksa_cache_entry * pmksa_cache_get(struct rsn_pmksa_cache *pmksa, 347 const u8 *aa, const u8 *pmkid, 348 const void *network_ctx) 349 { 350 struct rsn_pmksa_cache_entry *entry = pmksa->pmksa; 351 while (entry) { 352 if ((aa == NULL || os_memcmp(entry->aa, aa, ETH_ALEN) == 0) && 353 (pmkid == NULL || 354 os_memcmp(entry->pmkid, pmkid, PMKID_LEN) == 0) && 355 (network_ctx == NULL || network_ctx == entry->network_ctx)) 356 return entry; 357 entry = entry->next; 358 } 359 return NULL; 360 } 361 362 363 static struct rsn_pmksa_cache_entry * 364 pmksa_cache_clone_entry(struct rsn_pmksa_cache *pmksa, 365 const struct rsn_pmksa_cache_entry *old_entry, 366 const u8 *aa) 367 { 368 struct rsn_pmksa_cache_entry *new_entry; 369 os_time_t old_expiration = old_entry->expiration; 370 371 new_entry = pmksa_cache_add(pmksa, old_entry->pmk, old_entry->pmk_len, 372 NULL, NULL, 0, 373 aa, pmksa->sm->own_addr, 374 old_entry->network_ctx, old_entry->akmp, 375 old_entry->fils_cache_id_set ? 376 old_entry->fils_cache_id : NULL); 377 if (new_entry == NULL) 378 return NULL; 379 380 /* TODO: reorder entries based on expiration time? */ 381 new_entry->expiration = old_expiration; 382 new_entry->opportunistic = 1; 383 384 return new_entry; 385 } 386 387 388 /** 389 * pmksa_cache_get_opportunistic - Try to get an opportunistic PMKSA entry 390 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 391 * @network_ctx: Network configuration context 392 * @aa: Authenticator address for the new AP 393 * Returns: Pointer to a new PMKSA cache entry or %NULL if not available 394 * 395 * Try to create a new PMKSA cache entry opportunistically by guessing that the 396 * new AP is sharing the same PMK as another AP that has the same SSID and has 397 * already an entry in PMKSA cache. 398 */ 399 struct rsn_pmksa_cache_entry * 400 pmksa_cache_get_opportunistic(struct rsn_pmksa_cache *pmksa, void *network_ctx, 401 const u8 *aa) 402 { 403 struct rsn_pmksa_cache_entry *entry = pmksa->pmksa; 404 405 wpa_printf(MSG_DEBUG, "RSN: Consider " MACSTR " for OKC", MAC2STR(aa)); 406 if (network_ctx == NULL) 407 return NULL; 408 while (entry) { 409 if (entry->network_ctx == network_ctx) { 410 entry = pmksa_cache_clone_entry(pmksa, entry, aa); 411 if (entry) { 412 wpa_printf(MSG_DEBUG, "RSN: added " 413 "opportunistic PMKSA cache entry " 414 "for " MACSTR, MAC2STR(aa)); 415 } 416 return entry; 417 } 418 entry = entry->next; 419 } 420 return NULL; 421 } 422 423 424 static struct rsn_pmksa_cache_entry * 425 pmksa_cache_get_fils_cache_id(struct rsn_pmksa_cache *pmksa, 426 const void *network_ctx, const u8 *cache_id) 427 { 428 struct rsn_pmksa_cache_entry *entry; 429 430 for (entry = pmksa->pmksa; entry; entry = entry->next) { 431 if (network_ctx == entry->network_ctx && 432 entry->fils_cache_id_set && 433 os_memcmp(cache_id, entry->fils_cache_id, 434 FILS_CACHE_ID_LEN) == 0) 435 return entry; 436 } 437 438 return NULL; 439 } 440 441 442 /** 443 * pmksa_cache_get_current - Get the current used PMKSA entry 444 * @sm: Pointer to WPA state machine data from wpa_sm_init() 445 * Returns: Pointer to the current PMKSA cache entry or %NULL if not available 446 */ 447 struct rsn_pmksa_cache_entry * pmksa_cache_get_current(struct wpa_sm *sm) 448 { 449 if (sm == NULL) 450 return NULL; 451 return sm->cur_pmksa; 452 } 453 454 455 /** 456 * pmksa_cache_clear_current - Clear the current PMKSA entry selection 457 * @sm: Pointer to WPA state machine data from wpa_sm_init() 458 */ 459 void pmksa_cache_clear_current(struct wpa_sm *sm) 460 { 461 if (sm == NULL) 462 return; 463 sm->cur_pmksa = NULL; 464 } 465 466 467 /** 468 * pmksa_cache_set_current - Set the current PMKSA entry selection 469 * @sm: Pointer to WPA state machine data from wpa_sm_init() 470 * @pmkid: PMKID for selecting PMKSA or %NULL if not used 471 * @bssid: BSSID for PMKSA or %NULL if not used 472 * @network_ctx: Network configuration context 473 * @try_opportunistic: Whether to allow opportunistic PMKSA caching 474 * @fils_cache_id: Pointer to FILS Cache Identifier or %NULL if not used 475 * Returns: 0 if PMKSA was found or -1 if no matching entry was found 476 */ 477 int pmksa_cache_set_current(struct wpa_sm *sm, const u8 *pmkid, 478 const u8 *bssid, void *network_ctx, 479 int try_opportunistic, const u8 *fils_cache_id) 480 { 481 struct rsn_pmksa_cache *pmksa = sm->pmksa; 482 wpa_printf(MSG_DEBUG, "RSN: PMKSA cache search - network_ctx=%p " 483 "try_opportunistic=%d", network_ctx, try_opportunistic); 484 if (pmkid) 485 wpa_hexdump(MSG_DEBUG, "RSN: Search for PMKID", 486 pmkid, PMKID_LEN); 487 if (bssid) 488 wpa_printf(MSG_DEBUG, "RSN: Search for BSSID " MACSTR, 489 MAC2STR(bssid)); 490 if (fils_cache_id) 491 wpa_printf(MSG_DEBUG, 492 "RSN: Search for FILS Cache Identifier %02x%02x", 493 fils_cache_id[0], fils_cache_id[1]); 494 495 sm->cur_pmksa = NULL; 496 if (pmkid) 497 sm->cur_pmksa = pmksa_cache_get(pmksa, NULL, pmkid, 498 network_ctx); 499 if (sm->cur_pmksa == NULL && bssid) 500 sm->cur_pmksa = pmksa_cache_get(pmksa, bssid, NULL, 501 network_ctx); 502 if (sm->cur_pmksa == NULL && try_opportunistic && bssid) 503 sm->cur_pmksa = pmksa_cache_get_opportunistic(pmksa, 504 network_ctx, 505 bssid); 506 if (sm->cur_pmksa == NULL && fils_cache_id) 507 sm->cur_pmksa = pmksa_cache_get_fils_cache_id(pmksa, 508 network_ctx, 509 fils_cache_id); 510 if (sm->cur_pmksa) { 511 wpa_hexdump(MSG_DEBUG, "RSN: PMKSA cache entry found - PMKID", 512 sm->cur_pmksa->pmkid, PMKID_LEN); 513 return 0; 514 } 515 wpa_printf(MSG_DEBUG, "RSN: No PMKSA cache entry found"); 516 return -1; 517 } 518 519 520 /** 521 * pmksa_cache_list - Dump text list of entries in PMKSA cache 522 * @pmksa: Pointer to PMKSA cache data from pmksa_cache_init() 523 * @buf: Buffer for the list 524 * @len: Length of the buffer 525 * Returns: number of bytes written to buffer 526 * 527 * This function is used to generate a text format representation of the 528 * current PMKSA cache contents for the ctrl_iface PMKSA command. 529 */ 530 int pmksa_cache_list(struct rsn_pmksa_cache *pmksa, char *buf, size_t len) 531 { 532 int i, ret; 533 char *pos = buf; 534 struct rsn_pmksa_cache_entry *entry; 535 struct os_reltime now; 536 int cache_id_used = 0; 537 538 for (entry = pmksa->pmksa; entry; entry = entry->next) { 539 if (entry->fils_cache_id_set) { 540 cache_id_used = 1; 541 break; 542 } 543 } 544 545 os_get_reltime(&now); 546 ret = os_snprintf(pos, buf + len - pos, 547 "Index / AA / PMKID / expiration (in seconds) / " 548 "opportunistic%s\n", 549 cache_id_used ? " / FILS Cache Identifier" : ""); 550 if (os_snprintf_error(buf + len - pos, ret)) 551 return pos - buf; 552 pos += ret; 553 i = 0; 554 entry = pmksa->pmksa; 555 while (entry) { 556 i++; 557 ret = os_snprintf(pos, buf + len - pos, "%d " MACSTR " ", 558 i, MAC2STR(entry->aa)); 559 if (os_snprintf_error(buf + len - pos, ret)) 560 return pos - buf; 561 pos += ret; 562 pos += wpa_snprintf_hex(pos, buf + len - pos, entry->pmkid, 563 PMKID_LEN); 564 ret = os_snprintf(pos, buf + len - pos, " %d %d", 565 (int) (entry->expiration - now.sec), 566 entry->opportunistic); 567 if (os_snprintf_error(buf + len - pos, ret)) 568 return pos - buf; 569 pos += ret; 570 if (entry->fils_cache_id_set) { 571 ret = os_snprintf(pos, buf + len - pos, " %02x%02x", 572 entry->fils_cache_id[0], 573 entry->fils_cache_id[1]); 574 if (os_snprintf_error(buf + len - pos, ret)) 575 return pos - buf; 576 pos += ret; 577 } 578 ret = os_snprintf(pos, buf + len - pos, "\n"); 579 if (os_snprintf_error(buf + len - pos, ret)) 580 return pos - buf; 581 pos += ret; 582 entry = entry->next; 583 } 584 return pos - buf; 585 } 586 587 588 struct rsn_pmksa_cache_entry * pmksa_cache_head(struct rsn_pmksa_cache *pmksa) 589 { 590 return pmksa->pmksa; 591 } 592 593 594 /** 595 * pmksa_cache_init - Initialize PMKSA cache 596 * @free_cb: Callback function to be called when a PMKSA cache entry is freed 597 * @ctx: Context pointer for free_cb function 598 * @sm: Pointer to WPA state machine data from wpa_sm_init() 599 * Returns: Pointer to PMKSA cache data or %NULL on failure 600 */ 601 struct rsn_pmksa_cache * 602 pmksa_cache_init(void (*free_cb)(struct rsn_pmksa_cache_entry *entry, 603 void *ctx, enum pmksa_free_reason reason), 604 void *ctx, struct wpa_sm *sm) 605 { 606 struct rsn_pmksa_cache *pmksa; 607 608 pmksa = os_zalloc(sizeof(*pmksa)); 609 if (pmksa) { 610 pmksa->free_cb = free_cb; 611 pmksa->ctx = ctx; 612 pmksa->sm = sm; 613 } 614 615 return pmksa; 616 } 617 618 #endif /* IEEE8021X_EAPOL */ 619
