1 /* $OpenBSD: ieee80211_proto.c,v 1.93 2019/02/27 06:00:29 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 ic->ic_stats.is_ht_tx_ba_timeout++; 608 609 s = splnet(); 610 if (ba->ba_state == IEEE80211_BA_REQUESTED) { 611 /* MLME-ADDBA.confirm(TIMEOUT) */ 612 ba->ba_state = IEEE80211_BA_INIT; 613 614 } else if (ba->ba_state == IEEE80211_BA_AGREED) { 615 /* Block Ack inactivity timeout */ 616 tid = ((caddr_t)ba - (caddr_t)ni->ni_tx_ba) / sizeof(*ba); 617 ieee80211_delba_request(ic, ni, IEEE80211_REASON_TIMEOUT, 618 1, tid); 619 } 620 splx(s); 621 } 622 623 void 624 ieee80211_rx_ba_timeout(void *arg) 625 { 626 struct ieee80211_rx_ba *ba = arg; 627 struct ieee80211_node *ni = ba->ba_ni; 628 struct ieee80211com *ic = ni->ni_ic; 629 u_int8_t tid; 630 int s; 631 632 ic->ic_stats.is_ht_rx_ba_timeout++; 633 634 s = splnet(); 635 636 /* Block Ack inactivity timeout */ 637 tid = ((caddr_t)ba - (caddr_t)ni->ni_rx_ba) / sizeof(*ba); 638 ieee80211_delba_request(ic, ni, IEEE80211_REASON_TIMEOUT, 0, tid); 639 640 splx(s); 641 } 642 643 /* 644 * Request initiation of Block Ack with the specified peer. 645 */ 646 int 647 ieee80211_addba_request(struct ieee80211com *ic, struct ieee80211_node *ni, 648 u_int16_t ssn, u_int8_t tid) 649 { 650 struct ieee80211_tx_ba *ba = &ni->ni_tx_ba[tid]; 651 652 /* MLME-ADDBA.request */ 653 654 /* setup Block Ack */ 655 ba->ba_state = IEEE80211_BA_REQUESTED; 656 ba->ba_token = ic->ic_dialog_token++; 657 ba->ba_timeout_val = 0; 658 timeout_set(&ba->ba_to, ieee80211_tx_ba_timeout, ba); 659 ba->ba_winsize = IEEE80211_BA_MAX_WINSZ; 660 ba->ba_winstart = ssn; 661 ba->ba_winend = (ba->ba_winstart + ba->ba_winsize - 1) & 0xfff; 662 ba->ba_params = 663 (ba->ba_winsize << IEEE80211_ADDBA_BUFSZ_SHIFT) | 664 (tid << IEEE80211_ADDBA_TID_SHIFT) | IEEE80211_ADDBA_AMSDU; 665 if ((ic->ic_htcaps & IEEE80211_HTCAP_DELAYEDBA) == 0) 666 /* immediate BA */ 667 ba->ba_params |= IEEE80211_ADDBA_BA_POLICY; 668 669 timeout_add_sec(&ba->ba_to, 1); /* dot11ADDBAResponseTimeout */ 670 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA, 671 IEEE80211_ACTION_ADDBA_REQ, tid); 672 return 0; 673 } 674 675 /* 676 * Request the deletion of Block Ack with a peer. 677 */ 678 void 679 ieee80211_delba_request(struct ieee80211com *ic, struct ieee80211_node *ni, 680 u_int16_t reason, u_int8_t dir, u_int8_t tid) 681 { 682 /* MLME-DELBA.request */ 683 684 /* transmit a DELBA frame */ 685 IEEE80211_SEND_ACTION(ic, ni, IEEE80211_CATEG_BA, 686 IEEE80211_ACTION_DELBA, reason << 16 | dir << 8 | tid); 687 if (dir) { 688 /* MLME-DELBA.confirm(Originator) */ 689 struct ieee80211_tx_ba *ba = &ni->ni_tx_ba[tid]; 690 691 if (ic->ic_ampdu_tx_stop != NULL) 692 ic->ic_ampdu_tx_stop(ic, ni, tid); 693 694 ba->ba_state = IEEE80211_BA_INIT; 695 /* stop Block Ack inactivity timer */ 696 timeout_del(&ba->ba_to); 697 } else { 698 /* MLME-DELBA.confirm(Recipient) */ 699 struct ieee80211_rx_ba *ba = &ni->ni_rx_ba[tid]; 700 int i; 701 702 if (ic->ic_ampdu_rx_stop != NULL) 703 ic->ic_ampdu_rx_stop(ic, ni, tid); 704 705 ba->ba_state = IEEE80211_BA_INIT; 706 /* stop Block Ack inactivity timer */ 707 timeout_del(&ba->ba_to); 708 timeout_del(&ba->ba_gap_to); 709 710 if (ba->ba_buf != NULL) { 711 /* free all MSDUs stored in reordering buffer */ 712 for (i = 0; i < IEEE80211_BA_MAX_WINSZ; i++) 713 m_freem(ba->ba_buf[i].m); 714 /* free reordering buffer */ 715 free(ba->ba_buf, M_DEVBUF, 716 IEEE80211_BA_MAX_WINSZ * sizeof(*ba->ba_buf)); 717 ba->ba_buf = NULL; 718 } 719 } 720 } 721 722 #ifndef IEEE80211_STA_ONLY 723 void 724 ieee80211_auth_open_confirm(struct ieee80211com *ic, 725 struct ieee80211_node *ni, uint16_t seq) 726 { 727 struct ifnet *ifp = &ic->ic_if; 728 729 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 730 if (ifp->if_flags & IFF_DEBUG) 731 printf("%s: station %s %s authenticated (open)\n", 732 ifp->if_xname, 733 ether_sprintf((u_int8_t *)ni->ni_macaddr), 734 ni->ni_state != IEEE80211_STA_CACHE ? 735 "newly" : "already"); 736 ieee80211_node_newstate(ni, IEEE80211_STA_AUTH); 737 } 738 #endif 739 740 void 741 ieee80211_try_another_bss(struct ieee80211com *ic) 742 { 743 struct ieee80211_node *curbs, *selbs; 744 struct ifnet *ifp = &ic->ic_if; 745 746 /* Don't select our current AP again. */ 747 curbs = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr); 748 if (curbs) { 749 curbs->ni_fails++; 750 ieee80211_node_newstate(curbs, IEEE80211_STA_CACHE); 751 } 752 753 /* Try a different AP from the same ESS if available. */ 754 if (ic->ic_caps & IEEE80211_C_SCANALLBAND) { 755 /* 756 * Make sure we will consider APs on all bands during 757 * access point selection in ieee80211_node_choose_bss(). 758 * During multi-band scans, our previous AP may be trying 759 * to steer us onto another band by denying authentication. 760 */ 761 ieee80211_setmode(ic, IEEE80211_MODE_AUTO); 762 } 763 selbs = ieee80211_node_choose_bss(ic, 0, NULL); 764 if (selbs == NULL) 765 return; 766 767 /* Should not happen but seriously, don't try the same AP again. */ 768 if (memcmp(selbs->ni_macaddr, ic->ic_bss->ni_macaddr, 769 IEEE80211_NWID_LEN) == 0) 770 return; 771 772 if (ifp->if_flags & IFF_DEBUG) 773 printf("%s: trying AP %s on channel %d instead\n", 774 ifp->if_xname, ether_sprintf(selbs->ni_macaddr), 775 ieee80211_chan2ieee(ic, selbs->ni_chan)); 776 777 /* Triggers an AUTH->AUTH transition, avoiding another SCAN. */ 778 ieee80211_node_join_bss(ic, selbs); 779 } 780 781 void 782 ieee80211_auth_open(struct ieee80211com *ic, const struct ieee80211_frame *wh, 783 struct ieee80211_node *ni, struct ieee80211_rxinfo *rxi, u_int16_t seq, 784 u_int16_t status) 785 { 786 struct ifnet *ifp = &ic->ic_if; 787 switch (ic->ic_opmode) { 788 #ifndef IEEE80211_STA_ONLY 789 case IEEE80211_M_IBSS: 790 if (ic->ic_state != IEEE80211_S_RUN || 791 seq != IEEE80211_AUTH_OPEN_REQUEST) { 792 DPRINTF(("discard auth from %s; state %u, seq %u\n", 793 ether_sprintf((u_int8_t *)wh->i_addr2), 794 ic->ic_state, seq)); 795 ic->ic_stats.is_rx_bad_auth++; 796 return; 797 } 798 ieee80211_new_state(ic, IEEE80211_S_AUTH, 799 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 800 801 /* In IBSS mode no (re)association frames are sent. */ 802 if (ic->ic_flags & IEEE80211_F_RSNON) 803 ni->ni_rsn_supp_state = RSNA_SUPP_PTKSTART; 804 break; 805 806 case IEEE80211_M_AHDEMO: 807 /* should not come here */ 808 break; 809 810 case IEEE80211_M_HOSTAP: 811 if (ic->ic_state != IEEE80211_S_RUN || 812 seq != IEEE80211_AUTH_OPEN_REQUEST) { 813 DPRINTF(("discard auth from %s; state %u, seq %u\n", 814 ether_sprintf((u_int8_t *)wh->i_addr2), 815 ic->ic_state, seq)); 816 ic->ic_stats.is_rx_bad_auth++; 817 return; 818 } 819 if (ni == ic->ic_bss) { 820 ni = ieee80211_find_node(ic, wh->i_addr2); 821 if (ni == NULL) 822 ni = ieee80211_alloc_node(ic, wh->i_addr2); 823 if (ni == NULL) { 824 return; 825 } 826 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 827 ni->ni_rssi = rxi->rxi_rssi; 828 ni->ni_rstamp = rxi->rxi_tstamp; 829 ni->ni_chan = ic->ic_bss->ni_chan; 830 } 831 832 /* 833 * Drivers may want to set up state before confirming. 834 * In which case this returns EBUSY and the driver will 835 * later call ieee80211_auth_open_confirm() by itself. 836 */ 837 if (ic->ic_newauth && ic->ic_newauth(ic, ni, 838 ni->ni_state != IEEE80211_STA_CACHE, seq) != 0) 839 break; 840 ieee80211_auth_open_confirm(ic, ni, seq); 841 break; 842 #endif /* IEEE80211_STA_ONLY */ 843 844 case IEEE80211_M_STA: 845 if (ic->ic_state != IEEE80211_S_AUTH || 846 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 847 ic->ic_stats.is_rx_bad_auth++; 848 DPRINTF(("discard auth from %s; state %u, seq %u\n", 849 ether_sprintf((u_int8_t *)wh->i_addr2), 850 ic->ic_state, seq)); 851 return; 852 } 853 if (ic->ic_flags & IEEE80211_F_RSNON) { 854 /* XXX not here! */ 855 ic->ic_bss->ni_flags &= ~IEEE80211_NODE_TXRXPROT; 856 ic->ic_bss->ni_port_valid = 0; 857 ic->ic_bss->ni_replaycnt_ok = 0; 858 (*ic->ic_delete_key)(ic, ic->ic_bss, 859 &ic->ic_bss->ni_pairwise_key); 860 } 861 if (status != 0) { 862 if (ifp->if_flags & IFF_DEBUG) 863 printf("%s: open authentication failed " 864 "(status %d) for %s\n", ifp->if_xname, 865 status, 866 ether_sprintf((u_int8_t *)wh->i_addr3)); 867 if (ni != ic->ic_bss) 868 ni->ni_fails++; 869 else 870 ieee80211_try_another_bss(ic); 871 ic->ic_stats.is_rx_auth_fail++; 872 return; 873 } 874 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 875 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 876 break; 877 default: 878 break; 879 } 880 } 881 882 void 883 ieee80211_set_beacon_miss_threshold(struct ieee80211com *ic) 884 { 885 struct ifnet *ifp = &ic->ic_if; 886 887 /* 888 * Scale the missed beacon counter threshold to the AP's actual 889 * beacon interval. Give the AP at least 700 ms to time out and 890 * round up to ensure that at least one beacon may be missed. 891 */ 892 int btimeout = MIN(7 * ic->ic_bss->ni_intval, 700); 893 btimeout = MAX(btimeout, 2 * ic->ic_bss->ni_intval); 894 if (ic->ic_bss->ni_intval > 0) /* don't crash if interval is bogus */ 895 ic->ic_bmissthres = btimeout / ic->ic_bss->ni_intval; 896 897 if (ifp->if_flags & IFF_DEBUG) 898 printf("%s: missed beacon threshold set to %d beacons, " 899 "beacon interval is %u TU\n", ifp->if_xname, 900 ic->ic_bmissthres, ic->ic_bss->ni_intval); 901 } 902 903 int 904 ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, 905 int mgt) 906 { 907 struct ifnet *ifp = &ic->ic_if; 908 struct ieee80211_node *ni; 909 enum ieee80211_state ostate; 910 u_int rate; 911 #ifndef IEEE80211_STA_ONLY 912 int s; 913 #endif 914 915 ostate = ic->ic_state; 916 if (ifp->if_flags & IFF_DEBUG) 917 printf("%s: %s -> %s\n", ifp->if_xname, 918 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 919 ic->ic_state = nstate; /* state transition */ 920 ni = ic->ic_bss; /* NB: no reference held */ 921 ieee80211_set_link_state(ic, LINK_STATE_DOWN); 922 ic->ic_xflags &= ~IEEE80211_F_TX_MGMT_ONLY; 923 switch (nstate) { 924 case IEEE80211_S_INIT: 925 /* 926 * If mgt = -1, driver is already partway down, so do 927 * not send management frames. 928 */ 929 switch (ostate) { 930 case IEEE80211_S_INIT: 931 break; 932 case IEEE80211_S_RUN: 933 if (mgt == -1) 934 goto justcleanup; 935 switch (ic->ic_opmode) { 936 case IEEE80211_M_STA: 937 IEEE80211_SEND_MGMT(ic, ni, 938 IEEE80211_FC0_SUBTYPE_DISASSOC, 939 IEEE80211_REASON_ASSOC_LEAVE); 940 break; 941 #ifndef IEEE80211_STA_ONLY 942 case IEEE80211_M_HOSTAP: 943 s = splnet(); 944 RBT_FOREACH(ni, ieee80211_tree, &ic->ic_tree) { 945 if (ni->ni_state != IEEE80211_STA_ASSOC) 946 continue; 947 IEEE80211_SEND_MGMT(ic, ni, 948 IEEE80211_FC0_SUBTYPE_DISASSOC, 949 IEEE80211_REASON_ASSOC_LEAVE); 950 } 951 splx(s); 952 break; 953 #endif 954 default: 955 break; 956 } 957 /* FALLTHROUGH */ 958 case IEEE80211_S_ASSOC: 959 if (mgt == -1) 960 goto justcleanup; 961 switch (ic->ic_opmode) { 962 case IEEE80211_M_STA: 963 IEEE80211_SEND_MGMT(ic, ni, 964 IEEE80211_FC0_SUBTYPE_DEAUTH, 965 IEEE80211_REASON_AUTH_LEAVE); 966 break; 967 #ifndef IEEE80211_STA_ONLY 968 case IEEE80211_M_HOSTAP: 969 s = splnet(); 970 RBT_FOREACH(ni, ieee80211_tree, &ic->ic_tree) { 971 IEEE80211_SEND_MGMT(ic, ni, 972 IEEE80211_FC0_SUBTYPE_DEAUTH, 973 IEEE80211_REASON_AUTH_LEAVE); 974 } 975 splx(s); 976 break; 977 #endif 978 default: 979 break; 980 } 981 /* FALLTHROUGH */ 982 case IEEE80211_S_AUTH: 983 case IEEE80211_S_SCAN: 984 justcleanup: 985 #ifndef IEEE80211_STA_ONLY 986 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 987 timeout_del(&ic->ic_rsn_timeout); 988 #endif 989 timeout_del(&ic->ic_bgscan_timeout); 990 ic->ic_bgscan_fail = 0; 991 ic->ic_mgt_timer = 0; 992 mq_purge(&ic->ic_mgtq); 993 mq_purge(&ic->ic_pwrsaveq); 994 ieee80211_free_allnodes(ic, 1); 995 break; 996 } 997 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE; 998 if (ic->ic_flags & IEEE80211_F_RSNON) 999 ieee80211_crypto_clear_groupkeys(ic); 1000 break; 1001 case IEEE80211_S_SCAN: 1002 ic->ic_flags &= ~IEEE80211_F_SIBSS; 1003 /* initialize bss for probe request */ 1004 IEEE80211_ADDR_COPY(ni->ni_macaddr, etherbroadcastaddr); 1005 IEEE80211_ADDR_COPY(ni->ni_bssid, etherbroadcastaddr); 1006 ni->ni_rates = ic->ic_sup_rates[ 1007 ieee80211_chan2mode(ic, ni->ni_chan)]; 1008 ni->ni_associd = 0; 1009 ni->ni_rstamp = 0; 1010 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE; 1011 if (ic->ic_flags & IEEE80211_F_RSNON) 1012 ieee80211_crypto_clear_groupkeys(ic); 1013 switch (ostate) { 1014 case IEEE80211_S_INIT: 1015 #ifndef IEEE80211_STA_ONLY 1016 if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1017 ic->ic_des_chan != IEEE80211_CHAN_ANYC) { 1018 /* 1019 * AP operation and we already have a channel; 1020 * bypass the scan and startup immediately. 1021 */ 1022 ieee80211_create_ibss(ic, ic->ic_des_chan); 1023 } else 1024 #endif 1025 ieee80211_begin_scan(ifp); 1026 break; 1027 case IEEE80211_S_SCAN: 1028 /* scan next */ 1029 if (ic->ic_flags & IEEE80211_F_ASCAN) { 1030 IEEE80211_SEND_MGMT(ic, ni, 1031 IEEE80211_FC0_SUBTYPE_PROBE_REQ, 0); 1032 } 1033 break; 1034 case IEEE80211_S_RUN: 1035 /* beacon miss */ 1036 if (ifp->if_flags & IFF_DEBUG) { 1037 /* XXX bssid clobbered above */ 1038 printf("%s: no recent beacons from %s;" 1039 " rescanning\n", ifp->if_xname, 1040 ether_sprintf(ic->ic_bss->ni_bssid)); 1041 } 1042 timeout_del(&ic->ic_bgscan_timeout); 1043 ic->ic_bgscan_fail = 0; 1044 ieee80211_free_allnodes(ic, 1); 1045 /* FALLTHROUGH */ 1046 case IEEE80211_S_AUTH: 1047 case IEEE80211_S_ASSOC: 1048 /* timeout restart scan */ 1049 ni = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr); 1050 if (ni != NULL) 1051 ni->ni_fails++; 1052 ieee80211_begin_scan(ifp); 1053 break; 1054 } 1055 break; 1056 case IEEE80211_S_AUTH: 1057 ni->ni_rsn_supp_state = RSNA_SUPP_INITIALIZE; 1058 if (ic->ic_flags & IEEE80211_F_RSNON) 1059 ieee80211_crypto_clear_groupkeys(ic); 1060 switch (ostate) { 1061 case IEEE80211_S_INIT: 1062 if (ifp->if_flags & IFF_DEBUG) 1063 printf("%s: invalid transition %s -> %s\n", 1064 ifp->if_xname, ieee80211_state_name[ostate], 1065 ieee80211_state_name[nstate]); 1066 break; 1067 case IEEE80211_S_SCAN: 1068 IEEE80211_SEND_MGMT(ic, ni, 1069 IEEE80211_FC0_SUBTYPE_AUTH, 1); 1070 break; 1071 case IEEE80211_S_AUTH: 1072 case IEEE80211_S_ASSOC: 1073 switch (mgt) { 1074 case IEEE80211_FC0_SUBTYPE_AUTH: 1075 if (ic->ic_opmode == IEEE80211_M_STA) { 1076 IEEE80211_SEND_MGMT(ic, ni, 1077 IEEE80211_FC0_SUBTYPE_AUTH, 1078 IEEE80211_AUTH_OPEN_REQUEST); 1079 } 1080 break; 1081 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1082 /* ignore and retry scan on timeout */ 1083 break; 1084 } 1085 break; 1086 case IEEE80211_S_RUN: 1087 timeout_del(&ic->ic_bgscan_timeout); 1088 ic->ic_bgscan_fail = 0; 1089 switch (mgt) { 1090 case IEEE80211_FC0_SUBTYPE_AUTH: 1091 IEEE80211_SEND_MGMT(ic, ni, 1092 IEEE80211_FC0_SUBTYPE_AUTH, 2); 1093 ic->ic_state = ostate; /* stay RUN */ 1094 break; 1095 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1096 /* try to reauth */ 1097 IEEE80211_SEND_MGMT(ic, ni, 1098 IEEE80211_FC0_SUBTYPE_AUTH, 1); 1099 break; 1100 } 1101 break; 1102 } 1103 break; 1104 case IEEE80211_S_ASSOC: 1105 switch (ostate) { 1106 case IEEE80211_S_INIT: 1107 case IEEE80211_S_SCAN: 1108 case IEEE80211_S_ASSOC: 1109 if (ifp->if_flags & IFF_DEBUG) 1110 printf("%s: invalid transition %s -> %s\n", 1111 ifp->if_xname, ieee80211_state_name[ostate], 1112 ieee80211_state_name[nstate]); 1113 break; 1114 case IEEE80211_S_AUTH: 1115 IEEE80211_SEND_MGMT(ic, ni, 1116 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 1117 break; 1118 case IEEE80211_S_RUN: 1119 IEEE80211_SEND_MGMT(ic, ni, 1120 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1); 1121 break; 1122 } 1123 break; 1124 case IEEE80211_S_RUN: 1125 switch (ostate) { 1126 case IEEE80211_S_INIT: 1127 if (ic->ic_opmode == IEEE80211_M_MONITOR) 1128 break; 1129 case IEEE80211_S_AUTH: 1130 case IEEE80211_S_RUN: 1131 if (ifp->if_flags & IFF_DEBUG) 1132 printf("%s: invalid transition %s -> %s\n", 1133 ifp->if_xname, ieee80211_state_name[ostate], 1134 ieee80211_state_name[nstate]); 1135 break; 1136 case IEEE80211_S_SCAN: /* adhoc/hostap mode */ 1137 case IEEE80211_S_ASSOC: /* infra mode */ 1138 if (ni->ni_txrate >= ni->ni_rates.rs_nrates) 1139 panic("%s: bogus xmit rate %u setup", 1140 __func__, ni->ni_txrate); 1141 if (ifp->if_flags & IFF_DEBUG) { 1142 printf("%s: %s with %s ssid ", 1143 ifp->if_xname, 1144 ic->ic_opmode == IEEE80211_M_STA ? 1145 "associated" : "synchronized", 1146 ether_sprintf(ni->ni_bssid)); 1147 ieee80211_print_essid(ic->ic_bss->ni_essid, 1148 ni->ni_esslen); 1149 rate = ni->ni_rates.rs_rates[ni->ni_txrate] & 1150 IEEE80211_RATE_VAL; 1151 printf(" channel %d", 1152 ieee80211_chan2ieee(ic, ni->ni_chan)); 1153 if (ni->ni_flags & IEEE80211_NODE_HT) 1154 printf(" start MCS %u", ni->ni_txmcs); 1155 else 1156 printf(" start %u%sMb", 1157 rate / 2, (rate & 1) ? ".5" : ""); 1158 printf(" %s preamble %s slot time%s%s\n", 1159 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? 1160 "short" : "long", 1161 (ic->ic_flags & IEEE80211_F_SHSLOT) ? 1162 "short" : "long", 1163 (ic->ic_flags & IEEE80211_F_USEPROT) ? 1164 " protection enabled" : "", 1165 (ni->ni_flags & IEEE80211_NODE_HT) ? 1166 " HT enabled" : ""); 1167 } 1168 if (!(ic->ic_flags & IEEE80211_F_RSNON)) { 1169 /* 1170 * NB: When RSN is enabled, we defer setting 1171 * the link up until the port is valid. 1172 */ 1173 ieee80211_set_link_state(ic, LINK_STATE_UP); 1174 } 1175 ic->ic_mgt_timer = 0; 1176 ieee80211_set_beacon_miss_threshold(ic); 1177 if_start(ifp); 1178 break; 1179 } 1180 break; 1181 } 1182 return 0; 1183 } 1184 1185 void 1186 ieee80211_set_link_state(struct ieee80211com *ic, int nstate) 1187 { 1188 struct ifnet *ifp = &ic->ic_if; 1189 1190 switch (ic->ic_opmode) { 1191 #ifndef IEEE80211_STA_ONLY 1192 case IEEE80211_M_IBSS: 1193 case IEEE80211_M_HOSTAP: 1194 nstate = LINK_STATE_UNKNOWN; 1195 break; 1196 #endif 1197 case IEEE80211_M_MONITOR: 1198 nstate = LINK_STATE_DOWN; 1199 break; 1200 default: 1201 break; 1202 } 1203 if (nstate != ifp->if_link_state) { 1204 ifp->if_link_state = nstate; 1205 if (LINK_STATE_IS_UP(nstate)) { 1206 struct if_ieee80211_data ifie; 1207 memset(&ifie, 0, sizeof(ifie)); 1208 ifie.ifie_nwid_len = ic->ic_bss->ni_esslen; 1209 memcpy(ifie.ifie_nwid, ic->ic_bss->ni_essid, 1210 sizeof(ifie.ifie_nwid)); 1211 memcpy(ifie.ifie_addr, ic->ic_bss->ni_bssid, 1212 sizeof(ifie.ifie_addr)); 1213 ifie.ifie_channel = ieee80211_chan2ieee(ic, 1214 ic->ic_bss->ni_chan); 1215 ifie.ifie_flags = ic->ic_flags; 1216 ifie.ifie_xflags = ic->ic_xflags; 1217 rtm_80211info(&ic->ic_if, &ifie); 1218 } 1219 if_link_state_change(ifp); 1220 } 1221 } 1222