1 /* $OpenBSD: ieee80211_proto.c,v 1.96 2019/11/06 13:55:44 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; 436 437 /* Swap(GM, GN) */ 438 kid = (ic->ic_def_txkey == 1) ? 2 : 1; 439 k = &ic->ic_nw_keys[kid]; 440 memset(k, 0, sizeof(*k)); 441 k->k_id = kid; 442 k->k_cipher = ic->ic_bss->ni_rsngroupcipher; 443 k->k_flags = IEEE80211_KEY_GROUP | IEEE80211_KEY_TX; 444 k->k_len = ieee80211_cipher_keylen(k->k_cipher); 445 arc4random_buf(k->k_key, k->k_len); 446 447 if (ic->ic_caps & IEEE80211_C_MFP) { 448 /* Swap(GM_igtk, GN_igtk) */ 449 kid = (ic->ic_igtk_kid == 4) ? 5 : 4; 450 k = &ic->ic_nw_keys[kid]; 451 memset(k, 0, sizeof(*k)); 452 k->k_id = kid; 453 k->k_cipher = ic->ic_bss->ni_rsngroupmgmtcipher; 454 k->k_flags = IEEE80211_KEY_IGTK | IEEE80211_KEY_TX; 455 k->k_len = 16; 456 arc4random_buf(k->k_key, k->k_len); 457 } 458 459 ieee80211_iterate_nodes(ic, ieee80211_node_gtk_rekey, ic); 460 } 461 462 /* 463 * The group key handshake has been completed with all associated stations. 464 */ 465 void 466 ieee80211_setkeysdone(struct ieee80211com *ic) 467 { 468 u_int8_t kid; 469 470 /* install GTK */ 471 kid = (ic->ic_def_txkey == 1) ? 2 : 1; 472 if ((*ic->ic_set_key)(ic, ic->ic_bss, &ic->ic_nw_keys[kid]) == 0) 473 ic->ic_def_txkey = kid; 474 475 if (ic->ic_caps & IEEE80211_C_MFP) { 476 /* install IGTK */ 477 kid = (ic->ic_igtk_kid == 4) ? 5 : 4; 478 if ((*ic->ic_set_key)(ic, ic->ic_bss, 479 &ic->ic_nw_keys[kid]) == 0) 480 ic->ic_igtk_kid = kid; 481 } 482 } 483 484 /* 485 * Group key lifetime has expired, update it. 486 */ 487 void 488 ieee80211_gtk_rekey_timeout(void *arg) 489 { 490 struct ieee80211com *ic = arg; 491 int s; 492 493 s = splnet(); 494 ieee80211_setkeys(ic); 495 splx(s); 496 497 /* re-schedule a GTK rekeying after 3600s */ 498 timeout_add_sec(&ic->ic_rsn_timeout, 3600); 499 } 500 501 void 502 ieee80211_sa_query_timeout(void *arg) 503 { 504 struct ieee80211_node *ni = arg; 505 struct ieee80211com *ic = ni->ni_ic; 506 int s; 507 508 s = splnet(); 509 if (++ni->ni_sa_query_count >= 3) { 510 ni->ni_flags &= ~IEEE80211_NODE_SA_QUERY; 511 ni->ni_flags |= IEEE80211_NODE_SA_QUERY_FAILED; 512 } else /* retry SA Query Request */ 513 ieee80211_sa_query_request(ic, ni); 514 splx(s); 515 } 516 517 /* 518 * Request that a SA Query Request frame be sent to a specified peer STA 519 * to which the STA is associated. 520 */ 521 void 522 ieee80211_sa_query_request(struct ieee80211com *ic, struct ieee80211_node *ni) 523 { 524 /* MLME-SAQuery.request */ 525 526 if (!(ni->ni_flags & IEEE80211_NODE_SA_QUERY)) { 527 ni->ni_flags |= IEEE80211_NODE_SA_QUERY; 528 ni->ni_flags &= ~IEEE80211_NODE_SA_QUERY_FAILED; 529 ni->ni_sa_query_count = 0; 530 } 531 /* generate new Transaction Identifier */ 532 ni->ni_sa_query_trid++; 533 534 /* send SA Query Request */ 535 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_SA_QUERY, 536 IEEE80211_ACTION_SA_QUERY_REQ, 0); 537 timeout_add_msec(&ni->ni_sa_query_to, 10); 538 } 539 #endif /* IEEE80211_STA_ONLY */ 540 541 void 542 ieee80211_ht_negotiate(struct ieee80211com *ic, struct ieee80211_node *ni) 543 { 544 int i; 545 546 ni->ni_flags &= ~(IEEE80211_NODE_HT | IEEE80211_NODE_HT_SGI20 | 547 IEEE80211_NODE_HT_SGI40); 548 549 /* Check if we support HT. */ 550 if ((ic->ic_modecaps & (1 << IEEE80211_MODE_11N)) == 0) 551 return; 552 553 /* Check if HT support has been explicitly disabled. */ 554 if ((ic->ic_flags & IEEE80211_F_HTON) == 0) 555 return; 556 557 /* 558 * Check if the peer supports HT. 559 * Require at least one of the mandatory MCS. 560 * MCS 0-7 are mandatory but some APs have particular MCS disabled. 561 */ 562 if (!ieee80211_node_supports_ht(ni)) { 563 ic->ic_stats.is_ht_nego_no_mandatory_mcs++; 564 return; 565 } 566 567 if (ic->ic_opmode == IEEE80211_M_STA) { 568 /* We must support the AP's basic MCS set. */ 569 for (i = 0; i < IEEE80211_HT_NUM_MCS; i++) { 570 if (isset(ni->ni_basic_mcs, i) && 571 !isset(ic->ic_sup_mcs, i)) { 572 ic->ic_stats.is_ht_nego_no_basic_mcs++; 573 return; 574 } 575 } 576 } 577 578 /* 579 * Don't allow group cipher (includes WEP) or TKIP 580 * for pairwise encryption (see 802.11-2012 11.1.6). 581 */ 582 if (ic->ic_flags & IEEE80211_F_WEPON) { 583 ic->ic_stats.is_ht_nego_bad_crypto++; 584 return; 585 } 586 if ((ic->ic_flags & IEEE80211_F_RSNON) && 587 (ni->ni_rsnciphers & IEEE80211_CIPHER_USEGROUP || 588 ni->ni_rsnciphers & IEEE80211_CIPHER_TKIP)) { 589 ic->ic_stats.is_ht_nego_bad_crypto++; 590 return; 591 } 592 593 ni->ni_flags |= IEEE80211_NODE_HT; 594 595 /* Flags IEEE8021_NODE_HT_SGI20/40 are set by drivers if supported. */ 596 } 597 598 void 599 ieee80211_tx_ba_timeout(void *arg) 600 { 601 struct ieee80211_tx_ba *ba = arg; 602 struct ieee80211_node *ni = ba->ba_ni; 603 struct ieee80211com *ic = ni->ni_ic; 604 u_int8_t tid; 605 int s; 606 607 s = splnet(); 608 tid = ((caddr_t)ba - (caddr_t)ni->ni_tx_ba) / sizeof(*ba); 609 if (ba->ba_state == IEEE80211_BA_REQUESTED) { 610 /* MLME-ADDBA.confirm(TIMEOUT) */ 611 ba->ba_state = IEEE80211_BA_INIT; 612 if (ni->ni_addba_req_intval[tid] < 613 IEEE80211_ADDBA_REQ_INTVAL_MAX) 614 ni->ni_addba_req_intval[tid]++; 615 /* 616 * In case the peer believes there is an existing 617 * block ack agreement with us, try to delete it. 618 */ 619 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA, 620 IEEE80211_ACTION_DELBA, 621 IEEE80211_REASON_SETUP_REQUIRED << 16 | 1 << 8 | tid); 622 } else if (ba->ba_state == IEEE80211_BA_AGREED) { 623 /* Block Ack inactivity timeout */ 624 ic->ic_stats.is_ht_tx_ba_timeout++; 625 ieee80211_delba_request(ic, ni, IEEE80211_REASON_TIMEOUT, 626 1, tid); 627 } 628 splx(s); 629 } 630 631 void 632 ieee80211_rx_ba_timeout(void *arg) 633 { 634 struct ieee80211_rx_ba *ba = arg; 635 struct ieee80211_node *ni = ba->ba_ni; 636 struct ieee80211com *ic = ni->ni_ic; 637 u_int8_t tid; 638 int s; 639 640 ic->ic_stats.is_ht_rx_ba_timeout++; 641 642 s = splnet(); 643 644 /* Block Ack inactivity timeout */ 645 tid = ((caddr_t)ba - (caddr_t)ni->ni_rx_ba) / sizeof(*ba); 646 ieee80211_delba_request(ic, ni, IEEE80211_REASON_TIMEOUT, 0, tid); 647 648 splx(s); 649 } 650 651 /* 652 * Request initiation of Block Ack with the specified peer. 653 */ 654 int 655 ieee80211_addba_request(struct ieee80211com *ic, struct ieee80211_node *ni, 656 u_int16_t ssn, u_int8_t tid) 657 { 658 struct ieee80211_tx_ba *ba = &ni->ni_tx_ba[tid]; 659 660 if (ba->ba_state != IEEE80211_BA_INIT) 661 return EBUSY; 662 663 /* MLME-ADDBA.request */ 664 665 /* setup Block Ack */ 666 ba->ba_ni = ni; 667 ba->ba_state = IEEE80211_BA_REQUESTED; 668 ba->ba_token = ic->ic_dialog_token++; 669 ba->ba_timeout_val = 0; 670 timeout_set(&ba->ba_to, ieee80211_tx_ba_timeout, ba); 671 ba->ba_winsize = IEEE80211_BA_MAX_WINSZ; 672 ba->ba_winstart = ssn; 673 ba->ba_winend = (ba->ba_winstart + ba->ba_winsize - 1) & 0xfff; 674 ba->ba_params = 675 (ba->ba_winsize << IEEE80211_ADDBA_BUFSZ_SHIFT) | 676 (tid << IEEE80211_ADDBA_TID_SHIFT); 677 #if 0 678 /* 679 * XXX A-MSDUs inside A-MPDUs expose a problem with bad TCP connection 680 * sharing behaviour. One connection eats all available bandwidth 681 * while others stall. Leave this disabled for now to give packets 682 * from disparate connections better chances of interleaving. 683 */ 684 ba->ba_params |= IEEE80211_ADDBA_AMSDU; 685 #endif 686 if ((ic->ic_htcaps & IEEE80211_HTCAP_DELAYEDBA) == 0) 687 /* immediate BA */ 688 ba->ba_params |= IEEE80211_ADDBA_BA_POLICY; 689 690 timeout_add_sec(&ba->ba_to, 1); /* dot11ADDBAResponseTimeout */ 691 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA, 692 IEEE80211_ACTION_ADDBA_REQ, tid); 693 return 0; 694 } 695 696 /* 697 * Request the deletion of Block Ack with a peer and notify driver. 698 */ 699 void 700 ieee80211_delba_request(struct ieee80211com *ic, struct ieee80211_node *ni, 701 u_int16_t reason, u_int8_t dir, u_int8_t tid) 702 { 703 /* MLME-DELBA.request */ 704 705 if (reason) { 706 /* transmit a DELBA frame */ 707 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA, 708 IEEE80211_ACTION_DELBA, reason << 16 | dir << 8 | tid); 709 } 710 if (dir) { 711 /* MLME-DELBA.confirm(Originator) */ 712 struct ieee80211_tx_ba *ba = &ni->ni_tx_ba[tid]; 713 714 if (ic->ic_ampdu_tx_stop != NULL) 715 ic->ic_ampdu_tx_stop(ic, ni, tid); 716 717 ba->ba_state = IEEE80211_BA_INIT; 718 /* stop Block Ack inactivity timer */ 719 timeout_del(&ba->ba_to); 720 } else { 721 /* MLME-DELBA.confirm(Recipient) */ 722 struct ieee80211_rx_ba *ba = &ni->ni_rx_ba[tid]; 723 int i; 724 725 if (ic->ic_ampdu_rx_stop != NULL) 726 ic->ic_ampdu_rx_stop(ic, ni, tid); 727 728 ba->ba_state = IEEE80211_BA_INIT; 729 /* stop Block Ack inactivity timer */ 730 timeout_del(&ba->ba_to); 731 timeout_del(&ba->ba_gap_to); 732 733 if (ba->ba_buf != NULL) { 734 /* free all MSDUs stored in reordering buffer */ 735 for (i = 0; i < IEEE80211_BA_MAX_WINSZ; i++) 736 m_freem(ba->ba_buf[i].m); 737 /* free reordering buffer */ 738 free(ba->ba_buf, M_DEVBUF, 739 IEEE80211_BA_MAX_WINSZ * sizeof(*ba->ba_buf)); 740 ba->ba_buf = NULL; 741 } 742 } 743 } 744 745 #ifndef IEEE80211_STA_ONLY 746 void 747 ieee80211_auth_open_confirm(struct ieee80211com *ic, 748 struct ieee80211_node *ni, uint16_t seq) 749 { 750 struct ifnet *ifp = &ic->ic_if; 751 752 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 753 if (ifp->if_flags & IFF_DEBUG) 754 printf("%s: station %s %s authenticated (open)\n", 755 ifp->if_xname, 756 ether_sprintf((u_int8_t *)ni->ni_macaddr), 757 ni->ni_state != IEEE80211_STA_CACHE ? 758 "newly" : "already"); 759 ieee80211_node_newstate(ni, IEEE80211_STA_AUTH); 760 } 761 #endif 762 763 void 764 ieee80211_try_another_bss(struct ieee80211com *ic) 765 { 766 struct ieee80211_node *curbs, *selbs; 767 struct ifnet *ifp = &ic->ic_if; 768 769 /* Don't select our current AP again. */ 770 curbs = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr); 771 if (curbs) { 772 curbs->ni_fails++; 773 ieee80211_node_newstate(curbs, IEEE80211_STA_CACHE); 774 } 775 776 /* Try a different AP from the same ESS if available. */ 777 if (ic->ic_caps & IEEE80211_C_SCANALLBAND) { 778 /* 779 * Make sure we will consider APs on all bands during 780 * access point selection in ieee80211_node_choose_bss(). 781 * During multi-band scans, our previous AP may be trying 782 * to steer us onto another band by denying authentication. 783 */ 784 ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 785 } 786 selbs = ieee80211_node_choose_bss(ic, 0, NULL); 787 if (selbs == NULL) 788 return; 789 790 /* Should not happen but seriously, don't try the same AP again. */ 791 if (memcmp(selbs->ni_macaddr, ic->ic_bss->ni_macaddr, 792 IEEE80211_NWID_LEN) == 0) 793 return; 794 795 if (ifp->if_flags & IFF_DEBUG) 796 printf("%s: trying AP %s on channel %d instead\n", 797 ifp->if_xname, ether_sprintf(selbs->ni_macaddr), 798 ieee80211_chan2ieee(ic, selbs->ni_chan)); 799 800 /* Triggers an AUTH->AUTH transition, avoiding another SCAN. */ 801 ieee80211_node_join_bss(ic, selbs); 802 } 803 804 void 805 ieee80211_auth_open(struct ieee80211com *ic, const struct ieee80211_frame *wh, 806 struct ieee80211_node *ni, struct ieee80211_rxinfo *rxi, u_int16_t seq, 807 u_int16_t status) 808 { 809 struct ifnet *ifp = &ic->ic_if; 810 switch (ic->ic_opmode) { 811 #ifndef IEEE80211_STA_ONLY 812 case IEEE80211_M_IBSS: 813 if (ic->ic_state != IEEE80211_S_RUN || 814 seq != IEEE80211_AUTH_OPEN_REQUEST) { 815 DPRINTF(("discard auth from %s; state %u, seq %u\n", 816 ether_sprintf((u_int8_t *)wh->i_addr2), 817 ic->ic_state, seq)); 818 ic->ic_stats.is_rx_bad_auth++; 819 return; 820 } 821 ieee80211_new_state(ic, IEEE80211_S_AUTH, 822 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 823 824 /* In IBSS mode no (re)association frames are sent. */ 825 if (ic->ic_flags & IEEE80211_F_RSNON) 826 ni->ni_rsn_supp_state = RSNA_SUPP_PTKSTART; 827 break; 828 829 case IEEE80211_M_AHDEMO: 830 /* should not come here */ 831 break; 832 833 case IEEE80211_M_HOSTAP: 834 if (ic->ic_state != IEEE80211_S_RUN || 835 seq != IEEE80211_AUTH_OPEN_REQUEST) { 836 DPRINTF(("discard auth from %s; state %u, seq %u\n", 837 ether_sprintf((u_int8_t *)wh->i_addr2), 838 ic->ic_state, seq)); 839 ic->ic_stats.is_rx_bad_auth++; 840 return; 841 } 842 if (ni == ic->ic_bss) { 843 ni = ieee80211_find_node(ic, wh->i_addr2); 844 if (ni == NULL) 845 ni = ieee80211_alloc_node(ic, wh->i_addr2); 846 if (ni == NULL) { 847 return; 848 } 849 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 850 ni->ni_rssi = rxi->rxi_rssi; 851 ni->ni_rstamp = rxi->rxi_tstamp; 852 ni->ni_chan = ic->ic_bss->ni_chan; 853 } 854 855 /* 856 * Drivers may want to set up state before confirming. 857 * In which case this returns EBUSY and the driver will 858 * later call ieee80211_auth_open_confirm() by itself. 859 */ 860 if (ic->ic_newauth && ic->ic_newauth(ic, ni, 861 ni->ni_state != IEEE80211_STA_CACHE, seq) != 0) 862 break; 863 ieee80211_auth_open_confirm(ic, ni, seq); 864 break; 865 #endif /* IEEE80211_STA_ONLY */ 866 867 case IEEE80211_M_STA: 868 if (ic->ic_state != IEEE80211_S_AUTH || 869 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 870 ic->ic_stats.is_rx_bad_auth++; 871 DPRINTF(("discard auth from %s; state %u, seq %u\n", 872 ether_sprintf((u_int8_t *)wh->i_addr2), 873 ic->ic_state, seq)); 874 return; 875 } 876 if (ic->ic_flags & IEEE80211_F_RSNON) { 877 /* XXX not here! */ 878 ic->ic_bss->ni_flags &= ~IEEE80211_NODE_TXRXPROT; 879 ic->ic_bss->ni_port_valid = 0; 880 ic->ic_bss->ni_replaycnt_ok = 0; 881 (*ic->ic_delete_key)(ic, ic->ic_bss, 882 &ic->ic_bss->ni_pairwise_key); 883 } 884 if (status != 0) { 885 if (ifp->if_flags & IFF_DEBUG) 886 printf("%s: open authentication failed " 887 "(status %d) for %s\n", ifp->if_xname, 888 status, 889 ether_sprintf((u_int8_t *)wh->i_addr3)); 890 if (ni != ic->ic_bss) 891 ni->ni_fails++; 892 else 893 ieee80211_try_another_bss(ic); 894 ic->ic_stats.is_rx_auth_fail++; 895 return; 896 } 897 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 898 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 899 break; 900 default: 901 break; 902 } 903 } 904 905 void 906 ieee80211_set_beacon_miss_threshold(struct ieee80211com *ic) 907 { 908 struct ifnet *ifp = &ic->ic_if; 909 910 /* 911 * Scale the missed beacon counter threshold to the AP's actual 912 * beacon interval. 913 */ 914 int btimeout = MIN(IEEE80211_BEACON_MISS_THRES * ic->ic_bss->ni_intval, 915 IEEE80211_BEACON_MISS_THRES * (IEEE80211_DUR_TU / 10)); 916 /* Ensure that at least one beacon may be missed. */ 917 btimeout = MAX(btimeout, 2 * ic->ic_bss->ni_intval); 918 if (ic->ic_bss->ni_intval > 0) /* don't crash if interval is bogus */ 919 ic->ic_bmissthres = btimeout / ic->ic_bss->ni_intval; 920 921 if (ifp->if_flags & IFF_DEBUG) 922 printf("%s: missed beacon threshold set to %d beacons, " 923 "beacon interval is %u TU\n", ifp->if_xname, 924 ic->ic_bmissthres, ic->ic_bss->ni_intval); 925 } 926 927 /* Tell our peer, and the driver, to stop A-MPDU Tx for all TIDs. */ 928 void 929 ieee80211_stop_ampdu_tx(struct ieee80211com *ic, struct ieee80211_node *ni, 930 int mgt) 931 { 932 int tid; 933 934 for (tid = 0; tid < nitems(ni->ni_tx_ba); tid++) { 935 struct ieee80211_tx_ba *ba = &ni->ni_tx_ba[tid]; 936 if (ba->ba_state != IEEE80211_BA_AGREED) 937 continue; 938 ieee80211_delba_request(ic, ni, 939 mgt == -1 ? 0 : IEEE80211_REASON_AUTH_LEAVE, 1, tid); 940 } 941 } 942 943 void 944 ieee80211_check_wpa_supplicant_failure(struct ieee80211com *ic, 945 struct ieee80211_node *ni) 946 { 947 struct ieee80211_node *ni2; 948 949 if (ic->ic_opmode != IEEE80211_M_STA 950 #ifndef IEEE80211_STA_ONLY 951 && ic->ic_opmode != IEEE80211_M_IBSS 952 #endif 953 ) 954 return; 955 956 if (ni->ni_rsn_supp_state != RSNA_SUPP_PTKNEGOTIATING) 957 return; 958 959 ni->ni_assoc_fail |= IEEE80211_NODE_ASSOCFAIL_WPA_KEY; 960 961 if (ni != ic->ic_bss) 962 return; 963 964 /* Also update the copy of our AP's node in the node cache. */ 965 ni2 = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr); 966 if (ni2) 967 ni2->ni_assoc_fail |= ic->ic_bss->ni_assoc_fail; 968 } 969 970 int 971 ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, 972 int mgt) 973 { 974 struct ifnet *ifp = &ic->ic_if; 975 struct ieee80211_node *ni; 976 enum ieee80211_state ostate; 977 u_int rate; 978 #ifndef IEEE80211_STA_ONLY 979 int s; 980 #endif 981 982 ostate = ic->ic_state; 983 if (ifp->if_flags & IFF_DEBUG) 984 printf("%s: %s -> %s\n", ifp->if_xname, 985 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 986 ic->ic_state = nstate; /* state transition */ 987 ni = ic->ic_bss; /* NB: no reference held */ 988 ieee80211_set_link_state(ic, LINK_STATE_DOWN); 989 ic->ic_xflags &= ~IEEE80211_F_TX_MGMT_ONLY; 990 switch (nstate) { 991 case IEEE80211_S_INIT: 992 /* 993 * If mgt = -1, driver is already partway down, so do 994 * not send management frames. 995 */ 996 switch (ostate) { 997 case IEEE80211_S_INIT: 998 break; 999 case IEEE80211_S_RUN: 1000 if (mgt == -1) 1001 goto justcleanup; 1002 ieee80211_stop_ampdu_tx(ic, ni, mgt); 1003 ieee80211_ba_del(ni); 1004 switch (ic->ic_opmode) { 1005 case IEEE80211_M_STA: 1006 IEEE80211_SEND_MGMT(ic, ni, 1007 IEEE80211_FC0_SUBTYPE_DISASSOC, 1008 IEEE80211_REASON_ASSOC_LEAVE); 1009 break; 1010 #ifndef IEEE80211_STA_ONLY 1011 case IEEE80211_M_HOSTAP: 1012 s = splnet(); 1013 RBT_FOREACH(ni, ieee80211_tree, &ic->ic_tree) { 1014 if (ni->ni_state != IEEE80211_STA_ASSOC) 1015 continue; 1016 IEEE80211_SEND_MGMT(ic, ni, 1017 IEEE80211_FC0_SUBTYPE_DISASSOC, 1018 IEEE80211_REASON_ASSOC_LEAVE); 1019 } 1020 splx(s); 1021 break; 1022 #endif 1023 default: 1024 break; 1025 } 1026 /* FALLTHROUGH */ 1027 case IEEE80211_S_ASSOC: 1028 if (mgt == -1) 1029 goto justcleanup; 1030 switch (ic->ic_opmode) { 1031 case IEEE80211_M_STA: 1032 IEEE80211_SEND_MGMT(ic, ni, 1033 IEEE80211_FC0_SUBTYPE_DEAUTH, 1034 IEEE80211_REASON_AUTH_LEAVE); 1035 break; 1036 #ifndef IEEE80211_STA_ONLY 1037 case IEEE80211_M_HOSTAP: 1038 s = splnet(); 1039 RBT_FOREACH(ni, ieee80211_tree, &ic->ic_tree) { 1040 IEEE80211_SEND_MGMT(ic, ni, 1041 IEEE80211_FC0_SUBTYPE_DEAUTH, 1042 IEEE80211_REASON_AUTH_LEAVE); 1043 } 1044 splx(s); 1045 break; 1046 #endif 1047 default: 1048 break; 1049 } 1050 /* FALLTHROUGH */ 1051 case IEEE80211_S_AUTH: 1052 case IEEE80211_S_SCAN: 1053 justcleanup: 1054 #ifndef IEEE80211_STA_ONLY 1055 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 1056 timeout_del(&ic->ic_rsn_timeout); 1057 #endif 1058 ieee80211_ba_del(ni); 1059 timeout_del(&ic->ic_bgscan_timeout); 1060 ic->ic_bgscan_fail = 0; 1061 ic->ic_mgt_timer = 0; 1062 mq_purge(&ic->ic_mgtq); 1063 mq_purge(&ic->ic_pwrsaveq); 1064 ieee80211_free_allnodes(ic, 1); 1065 break; 1066 } 1067 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE; 1068 ni->ni_assoc_fail = 0; 1069 if (ic->ic_flags & IEEE80211_F_RSNON) 1070 ieee80211_crypto_clear_groupkeys(ic); 1071 break; 1072 case IEEE80211_S_SCAN: 1073 ic->ic_flags &= ~IEEE80211_F_SIBSS; 1074 /* initialize bss for probe request */ 1075 IEEE80211_ADDR_COPY(ni->ni_macaddr, etherbroadcastaddr); 1076 IEEE80211_ADDR_COPY(ni->ni_bssid, etherbroadcastaddr); 1077 ni->ni_rates = ic->ic_sup_rates[ 1078 ieee80211_chan2mode(ic, ni->ni_chan)]; 1079 ni->ni_associd = 0; 1080 ni->ni_rstamp = 0; 1081 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE; 1082 if (ic->ic_flags & IEEE80211_F_RSNON) 1083 ieee80211_crypto_clear_groupkeys(ic); 1084 switch (ostate) { 1085 case IEEE80211_S_INIT: 1086 #ifndef IEEE80211_STA_ONLY 1087 if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1088 ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 1089 /* 1090 * AP operation and we already have a channel; 1091 * bypass the scan and startup immediately. 1092 */ 1093 ieee80211_create_ibss(ic, ic->ic_des_chan); 1094 } else 1095 #endif 1096 ieee80211_begin_scan(ifp); 1097 break; 1098 case IEEE80211_S_SCAN: 1099 /* scan next */ 1100 if (ic->ic_flags & IEEE80211_F_ASCAN) { 1101 IEEE80211_SEND_MGMT(ic, ni, 1102 IEEE80211_FC0_SUBTYPE_PROBE_REQ, 0); 1103 } 1104 break; 1105 case IEEE80211_S_RUN: 1106 /* beacon miss */ 1107 if (ifp->if_flags & IFF_DEBUG) { 1108 /* XXX bssid clobbered above */ 1109 printf("%s: no recent beacons from %s;" 1110 " rescanning\n", ifp->if_xname, 1111 ether_sprintf(ic->ic_bss->ni_bssid)); 1112 } 1113 timeout_del(&ic->ic_bgscan_timeout); 1114 ic->ic_bgscan_fail = 0; 1115 ieee80211_stop_ampdu_tx(ic, ni, mgt); 1116 ieee80211_free_allnodes(ic, 1); 1117 /* FALLTHROUGH */ 1118 case IEEE80211_S_AUTH: 1119 case IEEE80211_S_ASSOC: 1120 /* timeout restart scan */ 1121 ni = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr); 1122 if (ni != NULL) 1123 ni->ni_fails++; 1124 ieee80211_begin_scan(ifp); 1125 break; 1126 } 1127 break; 1128 case IEEE80211_S_AUTH: 1129 if (ostate == IEEE80211_S_RUN) 1130 ieee80211_check_wpa_supplicant_failure(ic, ni); 1131 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE; 1132 if (ic->ic_flags & IEEE80211_F_RSNON) 1133 ieee80211_crypto_clear_groupkeys(ic); 1134 switch (ostate) { 1135 case IEEE80211_S_INIT: 1136 if (ifp->if_flags & IFF_DEBUG) 1137 printf("%s: invalid transition %s -> %s\n", 1138 ifp->if_xname, ieee80211_state_name[ostate], 1139 ieee80211_state_name[nstate]); 1140 break; 1141 case IEEE80211_S_SCAN: 1142 IEEE80211_SEND_MGMT(ic, ni, 1143 IEEE80211_FC0_SUBTYPE_AUTH, 1); 1144 break; 1145 case IEEE80211_S_AUTH: 1146 case IEEE80211_S_ASSOC: 1147 switch (mgt) { 1148 case IEEE80211_FC0_SUBTYPE_AUTH: 1149 if (ic->ic_opmode == IEEE80211_M_STA) { 1150 IEEE80211_SEND_MGMT(ic, ni, 1151 IEEE80211_FC0_SUBTYPE_AUTH, 1152 IEEE80211_AUTH_OPEN_REQUEST); 1153 } 1154 break; 1155 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1156 /* ignore and retry scan on timeout */ 1157 break; 1158 } 1159 break; 1160 case IEEE80211_S_RUN: 1161 timeout_del(&ic->ic_bgscan_timeout); 1162 ic->ic_bgscan_fail = 0; 1163 ieee80211_stop_ampdu_tx(ic, ni, mgt); 1164 ieee80211_ba_del(ni); 1165 switch (mgt) { 1166 case IEEE80211_FC0_SUBTYPE_AUTH: 1167 IEEE80211_SEND_MGMT(ic, ni, 1168 IEEE80211_FC0_SUBTYPE_AUTH, 2); 1169 ic->ic_state = ostate; /* stay RUN */ 1170 break; 1171 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1172 /* try to reauth */ 1173 IEEE80211_SEND_MGMT(ic, ni, 1174 IEEE80211_FC0_SUBTYPE_AUTH, 1); 1175 break; 1176 } 1177 break; 1178 } 1179 break; 1180 case IEEE80211_S_ASSOC: 1181 switch (ostate) { 1182 case IEEE80211_S_INIT: 1183 case IEEE80211_S_SCAN: 1184 case IEEE80211_S_ASSOC: 1185 if (ifp->if_flags & IFF_DEBUG) 1186 printf("%s: invalid transition %s -> %s\n", 1187 ifp->if_xname, ieee80211_state_name[ostate], 1188 ieee80211_state_name[nstate]); 1189 break; 1190 case IEEE80211_S_AUTH: 1191 IEEE80211_SEND_MGMT(ic, ni, 1192 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 1193 break; 1194 case IEEE80211_S_RUN: 1195 ieee80211_stop_ampdu_tx(ic, ni, mgt); 1196 ieee80211_ba_del(ni); 1197 IEEE80211_SEND_MGMT(ic, ni, 1198 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1); 1199 break; 1200 } 1201 break; 1202 case IEEE80211_S_RUN: 1203 switch (ostate) { 1204 case IEEE80211_S_INIT: 1205 if (ic->ic_opmode == IEEE80211_M_MONITOR) 1206 break; 1207 case IEEE80211_S_AUTH: 1208 case IEEE80211_S_RUN: 1209 if (ifp->if_flags & IFF_DEBUG) 1210 printf("%s: invalid transition %s -> %s\n", 1211 ifp->if_xname, ieee80211_state_name[ostate], 1212 ieee80211_state_name[nstate]); 1213 break; 1214 case IEEE80211_S_SCAN: /* adhoc/hostap mode */ 1215 case IEEE80211_S_ASSOC: /* infra mode */ 1216 if (ni->ni_txrate >= ni->ni_rates.rs_nrates) 1217 panic("%s: bogus xmit rate %u setup", 1218 __func__, ni->ni_txrate); 1219 if (ifp->if_flags & IFF_DEBUG) { 1220 printf("%s: %s with %s ssid ", 1221 ifp->if_xname, 1222 ic->ic_opmode == IEEE80211_M_STA ? 1223 "associated" : "synchronized", 1224 ether_sprintf(ni->ni_bssid)); 1225 ieee80211_print_essid(ic->ic_bss->ni_essid, 1226 ni->ni_esslen); 1227 rate = ni->ni_rates.rs_rates[ni->ni_txrate] & 1228 IEEE80211_RATE_VAL; 1229 printf(" channel %d", 1230 ieee80211_chan2ieee(ic, ni->ni_chan)); 1231 if (ni->ni_flags & IEEE80211_NODE_HT) 1232 printf(" start MCS %u", ni->ni_txmcs); 1233 else 1234 printf(" start %u%sMb", 1235 rate / 2, (rate & 1) ? ".5" : ""); 1236 printf(" %s preamble %s slot time%s%s\n", 1237 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? 1238 "short" : "long", 1239 (ic->ic_flags & IEEE80211_F_SHSLOT) ? 1240 "short" : "long", 1241 (ic->ic_flags & IEEE80211_F_USEPROT) ? 1242 " protection enabled" : "", 1243 (ni->ni_flags & IEEE80211_NODE_HT) ? 1244 " HT enabled" : ""); 1245 } 1246 if (!(ic->ic_flags & IEEE80211_F_RSNON)) { 1247 /* 1248 * NB: When RSN is enabled, we defer setting 1249 * the link up until the port is valid. 1250 */ 1251 ieee80211_set_link_state(ic, LINK_STATE_UP); 1252 ni->ni_assoc_fail = 0; 1253 } 1254 ic->ic_mgt_timer = 0; 1255 ieee80211_set_beacon_miss_threshold(ic); 1256 if_start(ifp); 1257 break; 1258 } 1259 break; 1260 } 1261 return 0; 1262 } 1263 1264 void 1265 ieee80211_set_link_state(struct ieee80211com *ic, int nstate) 1266 { 1267 struct ifnet *ifp = &ic->ic_if; 1268 1269 switch (ic->ic_opmode) { 1270 #ifndef IEEE80211_STA_ONLY 1271 case IEEE80211_M_IBSS: 1272 case IEEE80211_M_HOSTAP: 1273 nstate = LINK_STATE_UNKNOWN; 1274 break; 1275 #endif 1276 case IEEE80211_M_MONITOR: 1277 nstate = LINK_STATE_DOWN; 1278 break; 1279 default: 1280 break; 1281 } 1282 if (nstate != ifp->if_link_state) { 1283 ifp->if_link_state = nstate; 1284 if (LINK_STATE_IS_UP(nstate)) { 1285 struct if_ieee80211_data ifie; 1286 memset(&ifie, 0, sizeof(ifie)); 1287 ifie.ifie_nwid_len = ic->ic_bss->ni_esslen; 1288 memcpy(ifie.ifie_nwid, ic->ic_bss->ni_essid, 1289 sizeof(ifie.ifie_nwid)); 1290 memcpy(ifie.ifie_addr, ic->ic_bss->ni_bssid, 1291 sizeof(ifie.ifie_addr)); 1292 ifie.ifie_channel = ieee80211_chan2ieee(ic, 1293 ic->ic_bss->ni_chan); 1294 ifie.ifie_flags = ic->ic_flags; 1295 ifie.ifie_xflags = ic->ic_xflags; 1296 rtm_80211info(&ic->ic_if, &ifie); 1297 } 1298 if_link_state_change(ifp); 1299 } 1300 } 1301