1 /* $OpenBSD: ieee80211_proto.c,v 1.98 2020/05/29 07:37:51 stsp Exp $ */ 2 /* $NetBSD: ieee80211_proto.c,v 1.8 2004/04/30 23:58:20 dyoung Exp $ */ 3 4 /*- 5 * Copyright (c) 2001 Atsushi Onoe 6 * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting 7 * Copyright (c) 2008, 2009 Damien Bergamini 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * IEEE 802.11 protocol support. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/mbuf.h> 40 #include <sys/kernel.h> 41 #include <sys/socket.h> 42 #include <sys/sockio.h> 43 #include <sys/endian.h> 44 #include <sys/errno.h> 45 #include <sys/sysctl.h> 46 47 #include <net/if.h> 48 #include <net/if_dl.h> 49 #include <net/if_media.h> 50 #include <net/if_llc.h> 51 #include <net/route.h> 52 53 #include <netinet/in.h> 54 #include <netinet/if_ether.h> 55 56 #include <net80211/ieee80211_var.h> 57 #include <net80211/ieee80211_priv.h> 58 59 const char * const ieee80211_mgt_subtype_name[] = { 60 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", 61 "probe_req", "probe_resp", "reserved#6", "reserved#7", 62 "beacon", "atim", "disassoc", "auth", 63 "deauth", "action", "action_noack", "reserved#15" 64 }; 65 const char * const ieee80211_state_name[IEEE80211_S_MAX] = { 66 "INIT", /* IEEE80211_S_INIT */ 67 "SCAN", /* IEEE80211_S_SCAN */ 68 "AUTH", /* IEEE80211_S_AUTH */ 69 "ASSOC", /* IEEE80211_S_ASSOC */ 70 "RUN" /* IEEE80211_S_RUN */ 71 }; 72 const char * const ieee80211_phymode_name[] = { 73 "auto", /* IEEE80211_MODE_AUTO */ 74 "11a", /* IEEE80211_MODE_11A */ 75 "11b", /* IEEE80211_MODE_11B */ 76 "11g", /* IEEE80211_MODE_11G */ 77 "11n", /* IEEE80211_MODE_11N */ 78 }; 79 80 void ieee80211_set_beacon_miss_threshold(struct ieee80211com *); 81 int ieee80211_newstate(struct ieee80211com *, enum ieee80211_state, int); 82 83 void 84 ieee80211_proto_attach(struct ifnet *ifp) 85 { 86 struct ieee80211com *ic = (void *)ifp; 87 88 mq_init(&ic->ic_mgtq, IFQ_MAXLEN, IPL_NET); 89 mq_init(&ic->ic_pwrsaveq, IFQ_MAXLEN, IPL_NET); 90 91 ifp->if_hdrlen = sizeof(struct ieee80211_frame); 92 93 ic->ic_rtsthreshold = IEEE80211_RTS_MAX; 94 ic->ic_fragthreshold = 2346; /* XXX not used yet */ 95 ic->ic_fixed_rate = -1; /* no fixed rate */ 96 ic->ic_fixed_mcs = -1; /* no fixed mcs */ 97 ic->ic_protmode = IEEE80211_PROT_CTSONLY; 98 99 /* protocol state change handler */ 100 ic->ic_newstate = ieee80211_newstate; 101 102 /* initialize management frame handlers */ 103 ic->ic_recv_mgmt = ieee80211_recv_mgmt; 104 ic->ic_send_mgmt = ieee80211_send_mgmt; 105 } 106 107 void 108 ieee80211_proto_detach(struct ifnet *ifp) 109 { 110 struct ieee80211com *ic = (void *)ifp; 111 112 mq_purge(&ic->ic_mgtq); 113 mq_purge(&ic->ic_pwrsaveq); 114 } 115 116 void 117 ieee80211_print_essid(const u_int8_t *essid, int len) 118 { 119 int i; 120 const u_int8_t *p; 121 122 if (len > IEEE80211_NWID_LEN) 123 len = IEEE80211_NWID_LEN; 124 /* determine printable or not */ 125 for (i = 0, p = essid; i < len; i++, p++) { 126 if (*p < ' ' || *p > 0x7e) 127 break; 128 } 129 if (i == len) { 130 printf("\""); 131 for (i = 0, p = essid; i < len; i++, p++) 132 printf("%c", *p); 133 printf("\""); 134 } else { 135 printf("0x"); 136 for (i = 0, p = essid; i < len; i++, p++) 137 printf("%02x", *p); 138 } 139 } 140 141 #ifdef IEEE80211_DEBUG 142 void 143 ieee80211_dump_pkt(const u_int8_t *buf, int len, int rate, int rssi) 144 { 145 struct ieee80211_frame *wh; 146 int i; 147 148 wh = (struct ieee80211_frame *)buf; 149 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 150 case IEEE80211_FC1_DIR_NODS: 151 printf("NODS %s", ether_sprintf(wh->i_addr2)); 152 printf("->%s", ether_sprintf(wh->i_addr1)); 153 printf("(%s)", ether_sprintf(wh->i_addr3)); 154 break; 155 case IEEE80211_FC1_DIR_TODS: 156 printf("TODS %s", ether_sprintf(wh->i_addr2)); 157 printf("->%s", ether_sprintf(wh->i_addr3)); 158 printf("(%s)", ether_sprintf(wh->i_addr1)); 159 break; 160 case IEEE80211_FC1_DIR_FROMDS: 161 printf("FRDS %s", ether_sprintf(wh->i_addr3)); 162 printf("->%s", ether_sprintf(wh->i_addr1)); 163 printf("(%s)", ether_sprintf(wh->i_addr2)); 164 break; 165 case IEEE80211_FC1_DIR_DSTODS: 166 printf("DSDS %s", ether_sprintf((u_int8_t *)&wh[1])); 167 printf("->%s", ether_sprintf(wh->i_addr3)); 168 printf("(%s", ether_sprintf(wh->i_addr2)); 169 printf("->%s)", ether_sprintf(wh->i_addr1)); 170 break; 171 } 172 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 173 case IEEE80211_FC0_TYPE_DATA: 174 printf(" data"); 175 break; 176 case IEEE80211_FC0_TYPE_MGT: 177 printf(" %s", ieee80211_mgt_subtype_name[ 178 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) 179 >> IEEE80211_FC0_SUBTYPE_SHIFT]); 180 break; 181 default: 182 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 183 break; 184 } 185 if (wh->i_fc[1] & IEEE80211_FC1_WEP) 186 printf(" WEP"); 187 if (rate >= 0) 188 printf(" %d%sM", rate / 2, (rate & 1) ? ".5" : ""); 189 if (rssi >= 0) 190 printf(" +%d", rssi); 191 printf("\n"); 192 if (len > 0) { 193 for (i = 0; i < len; i++) { 194 if ((i & 1) == 0) 195 printf(" "); 196 printf("%02x", buf[i]); 197 } 198 printf("\n"); 199 } 200 } 201 #endif 202 203 int 204 ieee80211_fix_rate(struct ieee80211com *ic, struct ieee80211_node *ni, 205 int flags) 206 { 207 #define RV(v) ((v) & IEEE80211_RATE_VAL) 208 int i, j, ignore, error; 209 int okrate, badrate, fixedrate; 210 const struct ieee80211_rateset *srs; 211 struct ieee80211_rateset *nrs; 212 u_int8_t r; 213 214 /* 215 * If the fixed rate check was requested but no fixed rate has been 216 * defined then just remove the check. 217 */ 218 if ((flags & IEEE80211_F_DOFRATE) && ic->ic_fixed_rate == -1) 219 flags &= ~IEEE80211_F_DOFRATE; 220 221 error = 0; 222 okrate = badrate = fixedrate = 0; 223 srs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)]; 224 nrs = &ni->ni_rates; 225 for (i = 0; i < nrs->rs_nrates; ) { 226 ignore = 0; 227 if (flags & IEEE80211_F_DOSORT) { 228 /* 229 * Sort rates. 230 */ 231 for (j = i + 1; j < nrs->rs_nrates; j++) { 232 if (RV(nrs->rs_rates[i]) > 233 RV(nrs->rs_rates[j])) { 234 r = nrs->rs_rates[i]; 235 nrs->rs_rates[i] = nrs->rs_rates[j]; 236 nrs->rs_rates[j] = r; 237 } 238 } 239 } 240 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 241 badrate = r; 242 if (flags & IEEE80211_F_DOFRATE) { 243 /* 244 * Check fixed rate is included. 245 */ 246 if (r == RV(srs->rs_rates[ic->ic_fixed_rate])) 247 fixedrate = r; 248 } 249 if (flags & IEEE80211_F_DONEGO) { 250 /* 251 * Check against supported rates. 252 */ 253 for (j = 0; j < srs->rs_nrates; j++) { 254 if (r == RV(srs->rs_rates[j])) { 255 /* 256 * Overwrite with the supported rate 257 * value so any basic rate bit is set. 258 * This insures that response we send 259 * to stations have the necessary basic 260 * rate bit set. 261 */ 262 nrs->rs_rates[i] = srs->rs_rates[j]; 263 break; 264 } 265 } 266 if (j == srs->rs_nrates) { 267 /* 268 * A rate in the node's rate set is not 269 * supported. If this is a basic rate and we 270 * are operating as an AP then this is an error. 271 * Otherwise we just discard/ignore the rate. 272 * Note that this is important for 11b stations 273 * when they want to associate with an 11g AP. 274 */ 275 #ifndef IEEE80211_STA_ONLY 276 if (ic->ic_opmode == IEEE80211_M_HOSTAP && 277 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 278 error++; 279 #endif 280 ignore++; 281 } 282 } 283 if (flags & IEEE80211_F_DODEL) { 284 /* 285 * Delete unacceptable rates. 286 */ 287 if (ignore) { 288 nrs->rs_nrates--; 289 for (j = i; j < nrs->rs_nrates; j++) 290 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 291 nrs->rs_rates[j] = 0; 292 continue; 293 } 294 } 295 if (!ignore) 296 okrate = nrs->rs_rates[i]; 297 i++; 298 } 299 if (okrate == 0 || error != 0 || 300 ((flags & IEEE80211_F_DOFRATE) && fixedrate == 0)) 301 return badrate | IEEE80211_RATE_BASIC; 302 else 303 return RV(okrate); 304 #undef RV 305 } 306 307 /* 308 * Reset 11g-related state. 309 */ 310 void 311 ieee80211_reset_erp(struct ieee80211com *ic) 312 { 313 ic->ic_flags &= ~IEEE80211_F_USEPROT; 314 315 ieee80211_set_shortslottime(ic, 316 ic->ic_curmode == IEEE80211_MODE_11A || 317 (ic->ic_curmode == IEEE80211_MODE_11N && 318 IEEE80211_IS_CHAN_5GHZ(ic->ic_ibss_chan)) 319 #ifndef IEEE80211_STA_ONLY 320 || 321 ((ic->ic_curmode == IEEE80211_MODE_11G || 322 (ic->ic_curmode == IEEE80211_MODE_11N && 323 IEEE80211_IS_CHAN_2GHZ(ic->ic_ibss_chan))) && 324 ic->ic_opmode == IEEE80211_M_HOSTAP && 325 (ic->ic_caps & IEEE80211_C_SHSLOT)) 326 #endif 327 ); 328 329 if (ic->ic_curmode == IEEE80211_MODE_11A || 330 (ic->ic_curmode == IEEE80211_MODE_11N && 331 IEEE80211_IS_CHAN_5GHZ(ic->ic_ibss_chan)) || 332 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) 333 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 334 else 335 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 336 } 337 338 /* 339 * Set the short slot time state and notify the driver. 340 */ 341 void 342 ieee80211_set_shortslottime(struct ieee80211com *ic, int on) 343 { 344 if (on) 345 ic->ic_flags |= IEEE80211_F_SHSLOT; 346 else 347 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 348 349 /* notify the driver */ 350 if (ic->ic_updateslot != NULL) 351 ic->ic_updateslot(ic); 352 } 353 354 /* 355 * This function is called by the 802.1X PACP machine (via an ioctl) when 356 * the transmit key machine (4-Way Handshake for 802.11) should run. 357 */ 358 int 359 ieee80211_keyrun(struct ieee80211com *ic, u_int8_t *macaddr) 360 { 361 struct ieee80211_node *ni = ic->ic_bss; 362 #ifndef IEEE80211_STA_ONLY 363 struct ieee80211_pmk *pmk; 364 #endif 365 366 /* STA must be associated or AP must be ready */ 367 if (ic->ic_state != IEEE80211_S_RUN || 368 !(ic->ic_flags & IEEE80211_F_RSNON)) 369 return ENETDOWN; 370 371 ni->ni_rsn_supp_state = RSNA_SUPP_PTKSTART; 372 #ifndef IEEE80211_STA_ONLY 373 if (ic->ic_opmode == IEEE80211_M_STA) 374 #endif 375 return 0; /* supplicant only, do nothing */ 376 377 #ifndef IEEE80211_STA_ONLY 378 /* find the STA with which we must start the key exchange */ 379 if ((ni = ieee80211_find_node(ic, macaddr)) == NULL) { 380 DPRINTF(("no node found for %s\n", ether_sprintf(macaddr))); 381 return EINVAL; 382 } 383 /* check that the STA is in the correct state */ 384 if (ni->ni_state != IEEE80211_STA_ASSOC || 385 ni->ni_rsn_state != RSNA_AUTHENTICATION_2) { 386 DPRINTF(("unexpected in state %d\n", ni->ni_rsn_state)); 387 return EINVAL; 388 } 389 ni->ni_rsn_state = RSNA_INITPMK; 390 391 /* make sure a PMK is available for this STA, otherwise deauth it */ 392 if ((pmk = ieee80211_pmksa_find(ic, ni, NULL)) == NULL) { 393 DPRINTF(("no PMK available for %s\n", ether_sprintf(macaddr))); 394 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DEAUTH, 395 IEEE80211_REASON_AUTH_LEAVE); 396 ieee80211_node_leave(ic, ni); 397 return EINVAL; 398 } 399 memcpy(ni->ni_pmk, pmk->pmk_key, IEEE80211_PMK_LEN); 400 memcpy(ni->ni_pmkid, pmk->pmk_pmkid, IEEE80211_PMKID_LEN); 401 ni->ni_flags |= IEEE80211_NODE_PMK; 402 403 /* initiate key exchange (4-Way Handshake) with STA */ 404 return ieee80211_send_4way_msg1(ic, ni); 405 #endif /* IEEE80211_STA_ONLY */ 406 } 407 408 #ifndef IEEE80211_STA_ONLY 409 /* 410 * Initiate a group key handshake with a node. 411 */ 412 static void 413 ieee80211_node_gtk_rekey(void *arg, struct ieee80211_node *ni) 414 { 415 struct ieee80211com *ic = arg; 416 417 if (ni->ni_state != IEEE80211_STA_ASSOC || 418 ni->ni_rsn_gstate != RSNA_IDLE) 419 return; 420 421 /* initiate a group key handshake with STA */ 422 ni->ni_flags |= IEEE80211_NODE_REKEY; 423 if (ieee80211_send_group_msg1(ic, ni) != 0) 424 ni->ni_flags &= ~IEEE80211_NODE_REKEY; 425 } 426 427 /* 428 * This function is called in HostAP mode when the group key needs to be 429 * changed. 430 */ 431 void 432 ieee80211_setkeys(struct ieee80211com *ic) 433 { 434 struct ieee80211_key *k; 435 u_int8_t kid; 436 int rekeysta = 0; 437 438 /* Swap(GM, GN) */ 439 kid = (ic->ic_def_txkey == 1) ? 2 : 1; 440 k = &ic->ic_nw_keys[kid]; 441 memset(k, 0, sizeof(*k)); 442 k->k_id = kid; 443 k->k_cipher = ic->ic_bss->ni_rsngroupcipher; 444 k->k_flags = IEEE80211_KEY_GROUP | IEEE80211_KEY_TX; 445 k->k_len = ieee80211_cipher_keylen(k->k_cipher); 446 arc4random_buf(k->k_key, k->k_len); 447 448 if (ic->ic_caps & IEEE80211_C_MFP) { 449 /* Swap(GM_igtk, GN_igtk) */ 450 kid = (ic->ic_igtk_kid == 4) ? 5 : 4; 451 k = &ic->ic_nw_keys[kid]; 452 memset(k, 0, sizeof(*k)); 453 k->k_id = kid; 454 k->k_cipher = ic->ic_bss->ni_rsngroupmgmtcipher; 455 k->k_flags = IEEE80211_KEY_IGTK | IEEE80211_KEY_TX; 456 k->k_len = 16; 457 arc4random_buf(k->k_key, k->k_len); 458 } 459 460 ieee80211_iterate_nodes(ic, ieee80211_node_gtk_rekey, ic); 461 ieee80211_iterate_nodes(ic, ieee80211_count_rekeysta, &rekeysta); 462 if (rekeysta == 0) 463 ieee80211_setkeysdone(ic); 464 } 465 466 /* 467 * The group key handshake has been completed with all associated stations. 468 */ 469 void 470 ieee80211_setkeysdone(struct ieee80211com *ic) 471 { 472 u_int8_t kid; 473 474 /* 475 * Discard frames buffered for power-saving which were encrypted with 476 * the old group key. Clients are no longer able to decrypt them. 477 */ 478 mq_purge(&ic->ic_bss->ni_savedq); 479 480 /* install GTK */ 481 kid = (ic->ic_def_txkey == 1) ? 2 : 1; 482 if ((*ic->ic_set_key)(ic, ic->ic_bss, &ic->ic_nw_keys[kid]) == 0) 483 ic->ic_def_txkey = kid; 484 485 if (ic->ic_caps & IEEE80211_C_MFP) { 486 /* install IGTK */ 487 kid = (ic->ic_igtk_kid == 4) ? 5 : 4; 488 if ((*ic->ic_set_key)(ic, ic->ic_bss, 489 &ic->ic_nw_keys[kid]) == 0) 490 ic->ic_igtk_kid = kid; 491 } 492 } 493 494 /* 495 * Group key lifetime has expired, update it. 496 */ 497 void 498 ieee80211_gtk_rekey_timeout(void *arg) 499 { 500 struct ieee80211com *ic = arg; 501 int s; 502 503 s = splnet(); 504 ieee80211_setkeys(ic); 505 splx(s); 506 507 /* re-schedule a GTK rekeying after 3600s */ 508 timeout_add_sec(&ic->ic_rsn_timeout, 3600); 509 } 510 511 void 512 ieee80211_sa_query_timeout(void *arg) 513 { 514 struct ieee80211_node *ni = arg; 515 struct ieee80211com *ic = ni->ni_ic; 516 int s; 517 518 s = splnet(); 519 if (++ni->ni_sa_query_count >= 3) { 520 ni->ni_flags &= ~IEEE80211_NODE_SA_QUERY; 521 ni->ni_flags |= IEEE80211_NODE_SA_QUERY_FAILED; 522 } else /* retry SA Query Request */ 523 ieee80211_sa_query_request(ic, ni); 524 splx(s); 525 } 526 527 /* 528 * Request that a SA Query Request frame be sent to a specified peer STA 529 * to which the STA is associated. 530 */ 531 void 532 ieee80211_sa_query_request(struct ieee80211com *ic, struct ieee80211_node *ni) 533 { 534 /* MLME-SAQuery.request */ 535 536 if (!(ni->ni_flags & IEEE80211_NODE_SA_QUERY)) { 537 ni->ni_flags |= IEEE80211_NODE_SA_QUERY; 538 ni->ni_flags &= ~IEEE80211_NODE_SA_QUERY_FAILED; 539 ni->ni_sa_query_count = 0; 540 } 541 /* generate new Transaction Identifier */ 542 ni->ni_sa_query_trid++; 543 544 /* send SA Query Request */ 545 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_SA_QUERY, 546 IEEE80211_ACTION_SA_QUERY_REQ, 0); 547 timeout_add_msec(&ni->ni_sa_query_to, 10); 548 } 549 #endif /* IEEE80211_STA_ONLY */ 550 551 void 552 ieee80211_ht_negotiate(struct ieee80211com *ic, struct ieee80211_node *ni) 553 { 554 int i; 555 556 ni->ni_flags &= ~(IEEE80211_NODE_HT | IEEE80211_NODE_HT_SGI20 | 557 IEEE80211_NODE_HT_SGI40); 558 559 /* Check if we support HT. */ 560 if ((ic->ic_modecaps & (1 << IEEE80211_MODE_11N)) == 0) 561 return; 562 563 /* Check if HT support has been explicitly disabled. */ 564 if ((ic->ic_flags & IEEE80211_F_HTON) == 0) 565 return; 566 567 /* 568 * Check if the peer supports HT. 569 * Require at least one of the mandatory MCS. 570 * MCS 0-7 are mandatory but some APs have particular MCS disabled. 571 */ 572 if (!ieee80211_node_supports_ht(ni)) { 573 ic->ic_stats.is_ht_nego_no_mandatory_mcs++; 574 return; 575 } 576 577 if (ic->ic_opmode == IEEE80211_M_STA) { 578 /* We must support the AP's basic MCS set. */ 579 for (i = 0; i < IEEE80211_HT_NUM_MCS; i++) { 580 if (isset(ni->ni_basic_mcs, i) && 581 !isset(ic->ic_sup_mcs, i)) { 582 ic->ic_stats.is_ht_nego_no_basic_mcs++; 583 return; 584 } 585 } 586 } 587 588 /* 589 * Don't allow group cipher (includes WEP) or TKIP 590 * for pairwise encryption (see 802.11-2012 11.1.6). 591 */ 592 if (ic->ic_flags & IEEE80211_F_WEPON) { 593 ic->ic_stats.is_ht_nego_bad_crypto++; 594 return; 595 } 596 if ((ic->ic_flags & IEEE80211_F_RSNON) && 597 (ni->ni_rsnciphers & IEEE80211_CIPHER_USEGROUP || 598 ni->ni_rsnciphers & IEEE80211_CIPHER_TKIP)) { 599 ic->ic_stats.is_ht_nego_bad_crypto++; 600 return; 601 } 602 603 ni->ni_flags |= IEEE80211_NODE_HT; 604 605 /* Flags IEEE8021_NODE_HT_SGI20/40 are set by drivers if supported. */ 606 } 607 608 void 609 ieee80211_tx_ba_timeout(void *arg) 610 { 611 struct ieee80211_tx_ba *ba = arg; 612 struct ieee80211_node *ni = ba->ba_ni; 613 struct ieee80211com *ic = ni->ni_ic; 614 u_int8_t tid; 615 int s; 616 617 s = splnet(); 618 tid = ((caddr_t)ba - (caddr_t)ni->ni_tx_ba) / sizeof(*ba); 619 if (ba->ba_state == IEEE80211_BA_REQUESTED) { 620 /* MLME-ADDBA.confirm(TIMEOUT) */ 621 ba->ba_state = IEEE80211_BA_INIT; 622 if (ni->ni_addba_req_intval[tid] < 623 IEEE80211_ADDBA_REQ_INTVAL_MAX) 624 ni->ni_addba_req_intval[tid]++; 625 /* 626 * In case the peer believes there is an existing 627 * block ack agreement with us, try to delete it. 628 */ 629 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA, 630 IEEE80211_ACTION_DELBA, 631 IEEE80211_REASON_SETUP_REQUIRED << 16 | 1 << 8 | tid); 632 } else if (ba->ba_state == IEEE80211_BA_AGREED) { 633 /* Block Ack inactivity timeout */ 634 ic->ic_stats.is_ht_tx_ba_timeout++; 635 ieee80211_delba_request(ic, ni, IEEE80211_REASON_TIMEOUT, 636 1, tid); 637 } 638 splx(s); 639 } 640 641 void 642 ieee80211_rx_ba_timeout(void *arg) 643 { 644 struct ieee80211_rx_ba *ba = arg; 645 struct ieee80211_node *ni = ba->ba_ni; 646 struct ieee80211com *ic = ni->ni_ic; 647 u_int8_t tid; 648 int s; 649 650 ic->ic_stats.is_ht_rx_ba_timeout++; 651 652 s = splnet(); 653 654 /* Block Ack inactivity timeout */ 655 tid = ((caddr_t)ba - (caddr_t)ni->ni_rx_ba) / sizeof(*ba); 656 ieee80211_delba_request(ic, ni, IEEE80211_REASON_TIMEOUT, 0, tid); 657 658 splx(s); 659 } 660 661 /* 662 * Request initiation of Block Ack with the specified peer. 663 */ 664 int 665 ieee80211_addba_request(struct ieee80211com *ic, struct ieee80211_node *ni, 666 u_int16_t ssn, u_int8_t tid) 667 { 668 struct ieee80211_tx_ba *ba = &ni->ni_tx_ba[tid]; 669 670 if (ba->ba_state != IEEE80211_BA_INIT) 671 return EBUSY; 672 673 /* MLME-ADDBA.request */ 674 675 /* setup Block Ack */ 676 ba->ba_ni = ni; 677 ba->ba_state = IEEE80211_BA_REQUESTED; 678 ba->ba_token = ic->ic_dialog_token++; 679 ba->ba_timeout_val = 0; 680 timeout_set(&ba->ba_to, ieee80211_tx_ba_timeout, ba); 681 ba->ba_winsize = IEEE80211_BA_MAX_WINSZ; 682 ba->ba_winstart = ssn; 683 ba->ba_winend = (ba->ba_winstart + ba->ba_winsize - 1) & 0xfff; 684 ba->ba_params = 685 (ba->ba_winsize << IEEE80211_ADDBA_BUFSZ_SHIFT) | 686 (tid << IEEE80211_ADDBA_TID_SHIFT); 687 #if 0 688 /* 689 * XXX A-MSDUs inside A-MPDUs expose a problem with bad TCP connection 690 * sharing behaviour. One connection eats all available bandwidth 691 * while others stall. Leave this disabled for now to give packets 692 * from disparate connections better chances of interleaving. 693 */ 694 ba->ba_params |= IEEE80211_ADDBA_AMSDU; 695 #endif 696 if ((ic->ic_htcaps & IEEE80211_HTCAP_DELAYEDBA) == 0) 697 /* immediate BA */ 698 ba->ba_params |= IEEE80211_ADDBA_BA_POLICY; 699 700 timeout_add_sec(&ba->ba_to, 1); /* dot11ADDBAResponseTimeout */ 701 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA, 702 IEEE80211_ACTION_ADDBA_REQ, tid); 703 return 0; 704 } 705 706 /* 707 * Request the deletion of Block Ack with a peer and notify driver. 708 */ 709 void 710 ieee80211_delba_request(struct ieee80211com *ic, struct ieee80211_node *ni, 711 u_int16_t reason, u_int8_t dir, u_int8_t tid) 712 { 713 /* MLME-DELBA.request */ 714 715 if (reason) { 716 /* transmit a DELBA frame */ 717 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA, 718 IEEE80211_ACTION_DELBA, reason << 16 | dir << 8 | tid); 719 } 720 if (dir) { 721 /* MLME-DELBA.confirm(Originator) */ 722 struct ieee80211_tx_ba *ba = &ni->ni_tx_ba[tid]; 723 724 if (ic->ic_ampdu_tx_stop != NULL) 725 ic->ic_ampdu_tx_stop(ic, ni, tid); 726 727 ba->ba_state = IEEE80211_BA_INIT; 728 /* stop Block Ack inactivity timer */ 729 timeout_del(&ba->ba_to); 730 } else { 731 /* MLME-DELBA.confirm(Recipient) */ 732 struct ieee80211_rx_ba *ba = &ni->ni_rx_ba[tid]; 733 int i; 734 735 if (ic->ic_ampdu_rx_stop != NULL) 736 ic->ic_ampdu_rx_stop(ic, ni, tid); 737 738 ba->ba_state = IEEE80211_BA_INIT; 739 /* stop Block Ack inactivity timer */ 740 timeout_del(&ba->ba_to); 741 timeout_del(&ba->ba_gap_to); 742 743 if (ba->ba_buf != NULL) { 744 /* free all MSDUs stored in reordering buffer */ 745 for (i = 0; i < IEEE80211_BA_MAX_WINSZ; i++) 746 m_freem(ba->ba_buf[i].m); 747 /* free reordering buffer */ 748 free(ba->ba_buf, M_DEVBUF, 749 IEEE80211_BA_MAX_WINSZ * sizeof(*ba->ba_buf)); 750 ba->ba_buf = NULL; 751 } 752 } 753 } 754 755 #ifndef IEEE80211_STA_ONLY 756 void 757 ieee80211_auth_open_confirm(struct ieee80211com *ic, 758 struct ieee80211_node *ni, uint16_t seq) 759 { 760 struct ifnet *ifp = &ic->ic_if; 761 762 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 763 if (ifp->if_flags & IFF_DEBUG) 764 printf("%s: station %s %s authenticated (open)\n", 765 ifp->if_xname, 766 ether_sprintf((u_int8_t *)ni->ni_macaddr), 767 ni->ni_state != IEEE80211_STA_CACHE ? 768 "newly" : "already"); 769 ieee80211_node_newstate(ni, IEEE80211_STA_AUTH); 770 } 771 #endif 772 773 void 774 ieee80211_try_another_bss(struct ieee80211com *ic) 775 { 776 struct ieee80211_node *curbs, *selbs; 777 struct ifnet *ifp = &ic->ic_if; 778 779 /* Don't select our current AP again. */ 780 curbs = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr); 781 if (curbs) { 782 curbs->ni_fails++; 783 ieee80211_node_newstate(curbs, IEEE80211_STA_CACHE); 784 } 785 786 /* Try a different AP from the same ESS if available. */ 787 if (ic->ic_caps & IEEE80211_C_SCANALLBAND) { 788 /* 789 * Make sure we will consider APs on all bands during 790 * access point selection in ieee80211_node_choose_bss(). 791 * During multi-band scans, our previous AP may be trying 792 * to steer us onto another band by denying authentication. 793 */ 794 ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 795 } 796 selbs = ieee80211_node_choose_bss(ic, 0, NULL); 797 if (selbs == NULL) 798 return; 799 800 /* Should not happen but seriously, don't try the same AP again. */ 801 if (memcmp(selbs->ni_macaddr, ic->ic_bss->ni_macaddr, 802 IEEE80211_NWID_LEN) == 0) 803 return; 804 805 if (ifp->if_flags & IFF_DEBUG) 806 printf("%s: trying AP %s on channel %d instead\n", 807 ifp->if_xname, ether_sprintf(selbs->ni_macaddr), 808 ieee80211_chan2ieee(ic, selbs->ni_chan)); 809 810 /* Triggers an AUTH->AUTH transition, avoiding another SCAN. */ 811 ieee80211_node_join_bss(ic, selbs); 812 } 813 814 void 815 ieee80211_auth_open(struct ieee80211com *ic, const struct ieee80211_frame *wh, 816 struct ieee80211_node *ni, struct ieee80211_rxinfo *rxi, u_int16_t seq, 817 u_int16_t status) 818 { 819 struct ifnet *ifp = &ic->ic_if; 820 switch (ic->ic_opmode) { 821 #ifndef IEEE80211_STA_ONLY 822 case IEEE80211_M_IBSS: 823 if (ic->ic_state != IEEE80211_S_RUN || 824 seq != IEEE80211_AUTH_OPEN_REQUEST) { 825 DPRINTF(("discard auth from %s; state %u, seq %u\n", 826 ether_sprintf((u_int8_t *)wh->i_addr2), 827 ic->ic_state, seq)); 828 ic->ic_stats.is_rx_bad_auth++; 829 return; 830 } 831 ieee80211_new_state(ic, IEEE80211_S_AUTH, 832 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 833 834 /* In IBSS mode no (re)association frames are sent. */ 835 if (ic->ic_flags & IEEE80211_F_RSNON) 836 ni->ni_rsn_supp_state = RSNA_SUPP_PTKSTART; 837 break; 838 839 case IEEE80211_M_AHDEMO: 840 /* should not come here */ 841 break; 842 843 case IEEE80211_M_HOSTAP: 844 if (ic->ic_state != IEEE80211_S_RUN || 845 seq != IEEE80211_AUTH_OPEN_REQUEST) { 846 DPRINTF(("discard auth from %s; state %u, seq %u\n", 847 ether_sprintf((u_int8_t *)wh->i_addr2), 848 ic->ic_state, seq)); 849 ic->ic_stats.is_rx_bad_auth++; 850 return; 851 } 852 if (ni == ic->ic_bss) { 853 ni = ieee80211_find_node(ic, wh->i_addr2); 854 if (ni == NULL) 855 ni = ieee80211_alloc_node(ic, wh->i_addr2); 856 if (ni == NULL) { 857 return; 858 } 859 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 860 ni->ni_rssi = rxi->rxi_rssi; 861 ni->ni_rstamp = rxi->rxi_tstamp; 862 ni->ni_chan = ic->ic_bss->ni_chan; 863 } 864 865 /* 866 * Drivers may want to set up state before confirming. 867 * In which case this returns EBUSY and the driver will 868 * later call ieee80211_auth_open_confirm() by itself. 869 */ 870 if (ic->ic_newauth && ic->ic_newauth(ic, ni, 871 ni->ni_state != IEEE80211_STA_CACHE, seq) != 0) 872 break; 873 ieee80211_auth_open_confirm(ic, ni, seq); 874 break; 875 #endif /* IEEE80211_STA_ONLY */ 876 877 case IEEE80211_M_STA: 878 if (ic->ic_state != IEEE80211_S_AUTH || 879 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 880 ic->ic_stats.is_rx_bad_auth++; 881 DPRINTF(("discard auth from %s; state %u, seq %u\n", 882 ether_sprintf((u_int8_t *)wh->i_addr2), 883 ic->ic_state, seq)); 884 return; 885 } 886 if (ic->ic_flags & IEEE80211_F_RSNON) { 887 /* XXX not here! */ 888 ic->ic_bss->ni_flags &= ~IEEE80211_NODE_TXRXPROT; 889 ic->ic_bss->ni_port_valid = 0; 890 ic->ic_bss->ni_replaycnt_ok = 0; 891 (*ic->ic_delete_key)(ic, ic->ic_bss, 892 &ic->ic_bss->ni_pairwise_key); 893 } 894 if (status != 0) { 895 if (ifp->if_flags & IFF_DEBUG) 896 printf("%s: open authentication failed " 897 "(status %d) for %s\n", ifp->if_xname, 898 status, 899 ether_sprintf((u_int8_t *)wh->i_addr3)); 900 if (ni != ic->ic_bss) 901 ni->ni_fails++; 902 else 903 ieee80211_try_another_bss(ic); 904 ic->ic_stats.is_rx_auth_fail++; 905 return; 906 } 907 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 908 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 909 break; 910 default: 911 break; 912 } 913 } 914 915 void 916 ieee80211_set_beacon_miss_threshold(struct ieee80211com *ic) 917 { 918 struct ifnet *ifp = &ic->ic_if; 919 920 /* 921 * Scale the missed beacon counter threshold to the AP's actual 922 * beacon interval. 923 */ 924 int btimeout = MIN(IEEE80211_BEACON_MISS_THRES * ic->ic_bss->ni_intval, 925 IEEE80211_BEACON_MISS_THRES * (IEEE80211_DUR_TU / 10)); 926 /* Ensure that at least one beacon may be missed. */ 927 btimeout = MAX(btimeout, 2 * ic->ic_bss->ni_intval); 928 if (ic->ic_bss->ni_intval > 0) /* don't crash if interval is bogus */ 929 ic->ic_bmissthres = btimeout / ic->ic_bss->ni_intval; 930 931 if (ifp->if_flags & IFF_DEBUG) 932 printf("%s: missed beacon threshold set to %d beacons, " 933 "beacon interval is %u TU\n", ifp->if_xname, 934 ic->ic_bmissthres, ic->ic_bss->ni_intval); 935 } 936 937 /* Tell our peer, and the driver, to stop A-MPDU Tx for all TIDs. */ 938 void 939 ieee80211_stop_ampdu_tx(struct ieee80211com *ic, struct ieee80211_node *ni, 940 int mgt) 941 { 942 int tid; 943 944 for (tid = 0; tid < nitems(ni->ni_tx_ba); tid++) { 945 struct ieee80211_tx_ba *ba = &ni->ni_tx_ba[tid]; 946 if (ba->ba_state != IEEE80211_BA_AGREED) 947 continue; 948 ieee80211_delba_request(ic, ni, 949 mgt == -1 ? 0 : IEEE80211_REASON_AUTH_LEAVE, 1, tid); 950 } 951 } 952 953 void 954 ieee80211_check_wpa_supplicant_failure(struct ieee80211com *ic, 955 struct ieee80211_node *ni) 956 { 957 struct ieee80211_node *ni2; 958 959 if (ic->ic_opmode != IEEE80211_M_STA 960 #ifndef IEEE80211_STA_ONLY 961 && ic->ic_opmode != IEEE80211_M_IBSS 962 #endif 963 ) 964 return; 965 966 if (ni->ni_rsn_supp_state != RSNA_SUPP_PTKNEGOTIATING) 967 return; 968 969 ni->ni_assoc_fail |= IEEE80211_NODE_ASSOCFAIL_WPA_KEY; 970 971 if (ni != ic->ic_bss) 972 return; 973 974 /* Also update the copy of our AP's node in the node cache. */ 975 ni2 = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr); 976 if (ni2) 977 ni2->ni_assoc_fail |= ic->ic_bss->ni_assoc_fail; 978 } 979 980 int 981 ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, 982 int mgt) 983 { 984 struct ifnet *ifp = &ic->ic_if; 985 struct ieee80211_node *ni; 986 enum ieee80211_state ostate; 987 u_int rate; 988 #ifndef IEEE80211_STA_ONLY 989 int s; 990 #endif 991 992 ostate = ic->ic_state; 993 if (ifp->if_flags & IFF_DEBUG) 994 printf("%s: %s -> %s\n", ifp->if_xname, 995 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 996 ic->ic_state = nstate; /* state transition */ 997 ni = ic->ic_bss; /* NB: no reference held */ 998 ieee80211_set_link_state(ic, LINK_STATE_DOWN); 999 ic->ic_xflags &= ~IEEE80211_F_TX_MGMT_ONLY; 1000 switch (nstate) { 1001 case IEEE80211_S_INIT: 1002 /* 1003 * If mgt = -1, driver is already partway down, so do 1004 * not send management frames. 1005 */ 1006 switch (ostate) { 1007 case IEEE80211_S_INIT: 1008 break; 1009 case IEEE80211_S_RUN: 1010 if (mgt == -1) 1011 goto justcleanup; 1012 ieee80211_stop_ampdu_tx(ic, ni, mgt); 1013 ieee80211_ba_del(ni); 1014 switch (ic->ic_opmode) { 1015 case IEEE80211_M_STA: 1016 IEEE80211_SEND_MGMT(ic, ni, 1017 IEEE80211_FC0_SUBTYPE_DISASSOC, 1018 IEEE80211_REASON_ASSOC_LEAVE); 1019 break; 1020 #ifndef IEEE80211_STA_ONLY 1021 case IEEE80211_M_HOSTAP: 1022 s = splnet(); 1023 RBT_FOREACH(ni, ieee80211_tree, &ic->ic_tree) { 1024 if (ni->ni_state != IEEE80211_STA_ASSOC) 1025 continue; 1026 IEEE80211_SEND_MGMT(ic, ni, 1027 IEEE80211_FC0_SUBTYPE_DISASSOC, 1028 IEEE80211_REASON_ASSOC_LEAVE); 1029 } 1030 splx(s); 1031 break; 1032 #endif 1033 default: 1034 break; 1035 } 1036 /* FALLTHROUGH */ 1037 case IEEE80211_S_ASSOC: 1038 if (mgt == -1) 1039 goto justcleanup; 1040 switch (ic->ic_opmode) { 1041 case IEEE80211_M_STA: 1042 IEEE80211_SEND_MGMT(ic, ni, 1043 IEEE80211_FC0_SUBTYPE_DEAUTH, 1044 IEEE80211_REASON_AUTH_LEAVE); 1045 break; 1046 #ifndef IEEE80211_STA_ONLY 1047 case IEEE80211_M_HOSTAP: 1048 s = splnet(); 1049 RBT_FOREACH(ni, ieee80211_tree, &ic->ic_tree) { 1050 IEEE80211_SEND_MGMT(ic, ni, 1051 IEEE80211_FC0_SUBTYPE_DEAUTH, 1052 IEEE80211_REASON_AUTH_LEAVE); 1053 } 1054 splx(s); 1055 break; 1056 #endif 1057 default: 1058 break; 1059 } 1060 /* FALLTHROUGH */ 1061 case IEEE80211_S_AUTH: 1062 case IEEE80211_S_SCAN: 1063 justcleanup: 1064 #ifndef IEEE80211_STA_ONLY 1065 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 1066 timeout_del(&ic->ic_rsn_timeout); 1067 #endif 1068 ieee80211_ba_del(ni); 1069 timeout_del(&ic->ic_bgscan_timeout); 1070 ic->ic_bgscan_fail = 0; 1071 ic->ic_mgt_timer = 0; 1072 mq_purge(&ic->ic_mgtq); 1073 mq_purge(&ic->ic_pwrsaveq); 1074 ieee80211_free_allnodes(ic, 1); 1075 break; 1076 } 1077 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE; 1078 ni->ni_assoc_fail = 0; 1079 if (ic->ic_flags & IEEE80211_F_RSNON) 1080 ieee80211_crypto_clear_groupkeys(ic); 1081 break; 1082 case IEEE80211_S_SCAN: 1083 ic->ic_flags &= ~IEEE80211_F_SIBSS; 1084 /* initialize bss for probe request */ 1085 IEEE80211_ADDR_COPY(ni->ni_macaddr, etherbroadcastaddr); 1086 IEEE80211_ADDR_COPY(ni->ni_bssid, etherbroadcastaddr); 1087 ni->ni_rates = ic->ic_sup_rates[ 1088 ieee80211_chan2mode(ic, ni->ni_chan)]; 1089 ni->ni_associd = 0; 1090 ni->ni_rstamp = 0; 1091 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE; 1092 if (ic->ic_flags & IEEE80211_F_RSNON) 1093 ieee80211_crypto_clear_groupkeys(ic); 1094 switch (ostate) { 1095 case IEEE80211_S_INIT: 1096 #ifndef IEEE80211_STA_ONLY 1097 if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1098 ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 1099 /* 1100 * AP operation and we already have a channel; 1101 * bypass the scan and startup immediately. 1102 */ 1103 ieee80211_create_ibss(ic, ic->ic_des_chan); 1104 } else 1105 #endif 1106 ieee80211_begin_scan(ifp); 1107 break; 1108 case IEEE80211_S_SCAN: 1109 /* scan next */ 1110 if (ic->ic_flags & IEEE80211_F_ASCAN) { 1111 IEEE80211_SEND_MGMT(ic, ni, 1112 IEEE80211_FC0_SUBTYPE_PROBE_REQ, 0); 1113 } 1114 break; 1115 case IEEE80211_S_RUN: 1116 /* beacon miss */ 1117 if (ifp->if_flags & IFF_DEBUG) { 1118 /* XXX bssid clobbered above */ 1119 printf("%s: no recent beacons from %s;" 1120 " rescanning\n", ifp->if_xname, 1121 ether_sprintf(ic->ic_bss->ni_bssid)); 1122 } 1123 timeout_del(&ic->ic_bgscan_timeout); 1124 ic->ic_bgscan_fail = 0; 1125 ieee80211_stop_ampdu_tx(ic, ni, mgt); 1126 ieee80211_free_allnodes(ic, 1); 1127 /* FALLTHROUGH */ 1128 case IEEE80211_S_AUTH: 1129 case IEEE80211_S_ASSOC: 1130 /* timeout restart scan */ 1131 ni = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr); 1132 if (ni != NULL) 1133 ni->ni_fails++; 1134 ieee80211_begin_scan(ifp); 1135 break; 1136 } 1137 break; 1138 case IEEE80211_S_AUTH: 1139 if (ostate == IEEE80211_S_RUN) 1140 ieee80211_check_wpa_supplicant_failure(ic, ni); 1141 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE; 1142 if (ic->ic_flags & IEEE80211_F_RSNON) 1143 ieee80211_crypto_clear_groupkeys(ic); 1144 switch (ostate) { 1145 case IEEE80211_S_INIT: 1146 if (ifp->if_flags & IFF_DEBUG) 1147 printf("%s: invalid transition %s -> %s\n", 1148 ifp->if_xname, ieee80211_state_name[ostate], 1149 ieee80211_state_name[nstate]); 1150 break; 1151 case IEEE80211_S_SCAN: 1152 IEEE80211_SEND_MGMT(ic, ni, 1153 IEEE80211_FC0_SUBTYPE_AUTH, 1); 1154 break; 1155 case IEEE80211_S_AUTH: 1156 case IEEE80211_S_ASSOC: 1157 switch (mgt) { 1158 case IEEE80211_FC0_SUBTYPE_AUTH: 1159 if (ic->ic_opmode == IEEE80211_M_STA) { 1160 IEEE80211_SEND_MGMT(ic, ni, 1161 IEEE80211_FC0_SUBTYPE_AUTH, 1162 IEEE80211_AUTH_OPEN_REQUEST); 1163 } 1164 break; 1165 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1166 /* ignore and retry scan on timeout */ 1167 break; 1168 } 1169 break; 1170 case IEEE80211_S_RUN: 1171 timeout_del(&ic->ic_bgscan_timeout); 1172 ic->ic_bgscan_fail = 0; 1173 ieee80211_stop_ampdu_tx(ic, ni, mgt); 1174 ieee80211_ba_del(ni); 1175 switch (mgt) { 1176 case IEEE80211_FC0_SUBTYPE_AUTH: 1177 IEEE80211_SEND_MGMT(ic, ni, 1178 IEEE80211_FC0_SUBTYPE_AUTH, 2); 1179 ic->ic_state = ostate; /* stay RUN */ 1180 break; 1181 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1182 /* try to reauth */ 1183 IEEE80211_SEND_MGMT(ic, ni, 1184 IEEE80211_FC0_SUBTYPE_AUTH, 1); 1185 break; 1186 } 1187 break; 1188 } 1189 break; 1190 case IEEE80211_S_ASSOC: 1191 switch (ostate) { 1192 case IEEE80211_S_INIT: 1193 case IEEE80211_S_SCAN: 1194 case IEEE80211_S_ASSOC: 1195 if (ifp->if_flags & IFF_DEBUG) 1196 printf("%s: invalid transition %s -> %s\n", 1197 ifp->if_xname, ieee80211_state_name[ostate], 1198 ieee80211_state_name[nstate]); 1199 break; 1200 case IEEE80211_S_AUTH: 1201 IEEE80211_SEND_MGMT(ic, ni, 1202 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 1203 break; 1204 case IEEE80211_S_RUN: 1205 ieee80211_stop_ampdu_tx(ic, ni, mgt); 1206 ieee80211_ba_del(ni); 1207 IEEE80211_SEND_MGMT(ic, ni, 1208 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1); 1209 break; 1210 } 1211 break; 1212 case IEEE80211_S_RUN: 1213 switch (ostate) { 1214 case IEEE80211_S_INIT: 1215 if (ic->ic_opmode == IEEE80211_M_MONITOR) 1216 break; 1217 case IEEE80211_S_AUTH: 1218 case IEEE80211_S_RUN: 1219 if (ifp->if_flags & IFF_DEBUG) 1220 printf("%s: invalid transition %s -> %s\n", 1221 ifp->if_xname, ieee80211_state_name[ostate], 1222 ieee80211_state_name[nstate]); 1223 break; 1224 case IEEE80211_S_SCAN: /* adhoc/hostap mode */ 1225 case IEEE80211_S_ASSOC: /* infra mode */ 1226 if (ni->ni_txrate >= ni->ni_rates.rs_nrates) 1227 panic("%s: bogus xmit rate %u setup", 1228 __func__, ni->ni_txrate); 1229 if (ifp->if_flags & IFF_DEBUG) { 1230 printf("%s: %s with %s ssid ", 1231 ifp->if_xname, 1232 ic->ic_opmode == IEEE80211_M_STA ? 1233 "associated" : "synchronized", 1234 ether_sprintf(ni->ni_bssid)); 1235 ieee80211_print_essid(ic->ic_bss->ni_essid, 1236 ni->ni_esslen); 1237 rate = ni->ni_rates.rs_rates[ni->ni_txrate] & 1238 IEEE80211_RATE_VAL; 1239 printf(" channel %d", 1240 ieee80211_chan2ieee(ic, ni->ni_chan)); 1241 if (ni->ni_flags & IEEE80211_NODE_HT) 1242 printf(" start MCS %u", ni->ni_txmcs); 1243 else 1244 printf(" start %u%sMb", 1245 rate / 2, (rate & 1) ? ".5" : ""); 1246 printf(" %s preamble %s slot time%s%s\n", 1247 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? 1248 "short" : "long", 1249 (ic->ic_flags & IEEE80211_F_SHSLOT) ? 1250 "short" : "long", 1251 (ic->ic_flags & IEEE80211_F_USEPROT) ? 1252 " protection enabled" : "", 1253 (ni->ni_flags & IEEE80211_NODE_HT) ? 1254 " HT enabled" : ""); 1255 } 1256 if (!(ic->ic_flags & IEEE80211_F_RSNON)) { 1257 /* 1258 * NB: When RSN is enabled, we defer setting 1259 * the link up until the port is valid. 1260 */ 1261 ieee80211_set_link_state(ic, LINK_STATE_UP); 1262 ni->ni_assoc_fail = 0; 1263 } 1264 ic->ic_mgt_timer = 0; 1265 ieee80211_set_beacon_miss_threshold(ic); 1266 if_start(ifp); 1267 break; 1268 } 1269 break; 1270 } 1271 return 0; 1272 } 1273 1274 void 1275 ieee80211_set_link_state(struct ieee80211com *ic, int nstate) 1276 { 1277 struct ifnet *ifp = &ic->ic_if; 1278 1279 switch (ic->ic_opmode) { 1280 #ifndef IEEE80211_STA_ONLY 1281 case IEEE80211_M_IBSS: 1282 case IEEE80211_M_HOSTAP: 1283 nstate = LINK_STATE_UNKNOWN; 1284 break; 1285 #endif 1286 case IEEE80211_M_MONITOR: 1287 nstate = LINK_STATE_DOWN; 1288 break; 1289 default: 1290 break; 1291 } 1292 if (nstate != ifp->if_link_state) { 1293 ifp->if_link_state = nstate; 1294 if (LINK_STATE_IS_UP(nstate)) { 1295 struct if_ieee80211_data ifie; 1296 memset(&ifie, 0, sizeof(ifie)); 1297 ifie.ifie_nwid_len = ic->ic_bss->ni_esslen; 1298 memcpy(ifie.ifie_nwid, ic->ic_bss->ni_essid, 1299 sizeof(ifie.ifie_nwid)); 1300 memcpy(ifie.ifie_addr, ic->ic_bss->ni_bssid, 1301 sizeof(ifie.ifie_addr)); 1302 ifie.ifie_channel = ieee80211_chan2ieee(ic, 1303 ic->ic_bss->ni_chan); 1304 ifie.ifie_flags = ic->ic_flags; 1305 ifie.ifie_xflags = ic->ic_xflags; 1306 rtm_80211info(&ic->ic_if, &ifie); 1307 } 1308 if_link_state_change(ifp); 1309 } 1310 } 1311