1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Atsushi Onoe 5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_wlan.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/mbuf.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 40 #include <sys/socket.h> 41 42 #include <net/if.h> 43 #include <net/if_var.h> 44 #include <net/if_media.h> 45 #include <net/ethernet.h> 46 47 #include <net80211/ieee80211_var.h> 48 #include <net80211/ieee80211_input.h> 49 #ifdef IEEE80211_SUPPORT_SUPERG 50 #include <net80211/ieee80211_superg.h> 51 #endif 52 #ifdef IEEE80211_SUPPORT_TDMA 53 #include <net80211/ieee80211_tdma.h> 54 #endif 55 #include <net80211/ieee80211_wds.h> 56 #include <net80211/ieee80211_mesh.h> 57 #include <net80211/ieee80211_ratectl.h> 58 #include <net80211/ieee80211_vht.h> 59 60 #include <net/bpf.h> 61 62 /* 63 * IEEE80211_NODE_HASHSIZE must be a power of 2. 64 */ 65 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 66 67 /* 68 * Association id's are managed with a bit vector. 69 */ 70 #define IEEE80211_AID_SET(_vap, b) \ 71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 72 (1 << (IEEE80211_AID(b) % 32))) 73 #define IEEE80211_AID_CLR(_vap, b) \ 74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 75 ~(1 << (IEEE80211_AID(b) % 32))) 76 #define IEEE80211_AID_ISSET(_vap, b) \ 77 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 78 79 static int ieee80211_sta_join1(struct ieee80211_node *); 80 81 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 82 const uint8_t [IEEE80211_ADDR_LEN]); 83 static int node_init(struct ieee80211_node *); 84 static void node_cleanup(struct ieee80211_node *); 85 static void node_free(struct ieee80211_node *); 86 static void node_age(struct ieee80211_node *); 87 static int8_t node_getrssi(const struct ieee80211_node *); 88 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 89 static void node_getmimoinfo(const struct ieee80211_node *, 90 struct ieee80211_mimo_info *); 91 92 static void _ieee80211_free_node(struct ieee80211_node *); 93 94 static void node_reclaim(struct ieee80211_node_table *nt, 95 struct ieee80211_node *ni); 96 static void ieee80211_node_table_init(struct ieee80211com *ic, 97 struct ieee80211_node_table *nt, const char *name, 98 int inact, int keymaxix); 99 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 100 struct ieee80211vap *); 101 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 102 static void ieee80211_erp_timeout(struct ieee80211com *); 103 104 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 105 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 106 107 void 108 ieee80211_node_attach(struct ieee80211com *ic) 109 { 110 /* XXX really want maxlen enforced per-sta */ 111 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 112 "802.11 staging q"); 113 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 114 IEEE80211_INACT_INIT, ic->ic_max_keyix); 115 callout_init(&ic->ic_inact, 1); 116 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 117 ieee80211_node_timeout, ic); 118 119 ic->ic_node_alloc = node_alloc; 120 ic->ic_node_init = node_init; 121 ic->ic_node_free = node_free; 122 ic->ic_node_cleanup = node_cleanup; 123 ic->ic_node_age = node_age; 124 ic->ic_node_drain = node_age; /* NB: same as age */ 125 ic->ic_node_getrssi = node_getrssi; 126 ic->ic_node_getsignal = node_getsignal; 127 ic->ic_node_getmimoinfo = node_getmimoinfo; 128 129 /* 130 * Set flags to be propagated to all vap's; 131 * these define default behaviour/configuration. 132 */ 133 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 134 } 135 136 void 137 ieee80211_node_detach(struct ieee80211com *ic) 138 { 139 140 callout_drain(&ic->ic_inact); 141 ieee80211_node_table_cleanup(&ic->ic_sta); 142 ieee80211_ageq_drain(&ic->ic_stageq); 143 ieee80211_ageq_cleanup(&ic->ic_stageq); 144 } 145 146 void 147 ieee80211_node_vattach(struct ieee80211vap *vap) 148 { 149 /* NB: driver can override */ 150 vap->iv_max_aid = IEEE80211_AID_DEF; 151 152 /* default station inactivity timer setings */ 153 vap->iv_inact_init = IEEE80211_INACT_INIT; 154 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 155 vap->iv_inact_run = IEEE80211_INACT_RUN; 156 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 157 158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 159 "%s: init %u auth %u run %u probe %u\n", __func__, 160 vap->iv_inact_init, vap->iv_inact_auth, 161 vap->iv_inact_run, vap->iv_inact_probe); 162 } 163 164 void 165 ieee80211_node_latevattach(struct ieee80211vap *vap) 166 { 167 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 168 /* XXX should we allow max aid to be zero? */ 169 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 170 vap->iv_max_aid = IEEE80211_AID_MIN; 171 if_printf(vap->iv_ifp, 172 "WARNING: max aid too small, changed to %d\n", 173 vap->iv_max_aid); 174 } 175 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 176 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 177 M_80211_NODE, 178 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 179 if (vap->iv_aid_bitmap == NULL) { 180 /* XXX no way to recover */ 181 printf("%s: no memory for AID bitmap, max aid %d!\n", 182 __func__, vap->iv_max_aid); 183 vap->iv_max_aid = 0; 184 } 185 } 186 187 ieee80211_reset_bss(vap); 188 189 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 190 } 191 192 void 193 ieee80211_node_vdetach(struct ieee80211vap *vap) 194 { 195 struct ieee80211com *ic = vap->iv_ic; 196 197 ieee80211_node_table_reset(&ic->ic_sta, vap); 198 if (vap->iv_bss != NULL) { 199 ieee80211_free_node(vap->iv_bss); 200 vap->iv_bss = NULL; 201 } 202 if (vap->iv_aid_bitmap != NULL) { 203 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 204 vap->iv_aid_bitmap = NULL; 205 } 206 } 207 208 /* 209 * Port authorize/unauthorize interfaces for use by an authenticator. 210 */ 211 212 void 213 ieee80211_node_authorize(struct ieee80211_node *ni) 214 { 215 struct ieee80211vap *vap = ni->ni_vap; 216 217 ni->ni_flags |= IEEE80211_NODE_AUTH; 218 ni->ni_inact_reload = vap->iv_inact_run; 219 ni->ni_inact = ni->ni_inact_reload; 220 221 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 222 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 223 } 224 225 void 226 ieee80211_node_unauthorize(struct ieee80211_node *ni) 227 { 228 struct ieee80211vap *vap = ni->ni_vap; 229 230 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 231 ni->ni_inact_reload = vap->iv_inact_auth; 232 if (ni->ni_inact > ni->ni_inact_reload) 233 ni->ni_inact = ni->ni_inact_reload; 234 235 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 236 "%s: inact_reload %u inact %u", __func__, 237 ni->ni_inact_reload, ni->ni_inact); 238 } 239 240 /* 241 * Fix tx parameters for a node according to ``association state''. 242 */ 243 void 244 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 245 { 246 struct ieee80211vap *vap = ni->ni_vap; 247 enum ieee80211_phymode mode; 248 249 if (ni->ni_flags & IEEE80211_NODE_VHT) { 250 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 251 mode = IEEE80211_MODE_VHT_5GHZ; 252 else 253 mode = IEEE80211_MODE_VHT_2GHZ; 254 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 255 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 256 mode = IEEE80211_MODE_11NA; 257 else 258 mode = IEEE80211_MODE_11NG; 259 } else { /* legacy rate handling */ 260 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 261 mode = IEEE80211_MODE_STURBO_A; 262 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 263 mode = IEEE80211_MODE_HALF; 264 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 265 mode = IEEE80211_MODE_QUARTER; 266 /* NB: 108A should be handled as 11a */ 267 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 268 mode = IEEE80211_MODE_11A; 269 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 270 (ni->ni_flags & IEEE80211_NODE_ERP)) 271 mode = IEEE80211_MODE_11G; 272 else 273 mode = IEEE80211_MODE_11B; 274 } 275 ni->ni_txparms = &vap->iv_txparms[mode]; 276 } 277 278 /* 279 * Set/change the channel. The rate set is also updated as 280 * to insure a consistent view by drivers. 281 * XXX should be private but hostap needs it to deal with CSA 282 */ 283 void 284 ieee80211_node_set_chan(struct ieee80211_node *ni, 285 struct ieee80211_channel *chan) 286 { 287 struct ieee80211com *ic = ni->ni_ic; 288 struct ieee80211vap *vap = ni->ni_vap; 289 enum ieee80211_phymode mode; 290 291 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 292 293 ni->ni_chan = chan; 294 mode = ieee80211_chan2mode(chan); 295 if (IEEE80211_IS_CHAN_HT(chan)) { 296 /* 297 * We must install the legacy rate est in ni_rates and the 298 * HT rate set in ni_htrates. 299 */ 300 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 301 /* 302 * Setup bss tx parameters based on operating mode. We 303 * use legacy rates when operating in a mixed HT+non-HT bss 304 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 305 */ 306 if (mode == IEEE80211_MODE_11NA && 307 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 308 mode = IEEE80211_MODE_11A; 309 else if (mode == IEEE80211_MODE_11NG && 310 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 311 mode = IEEE80211_MODE_11G; 312 if (mode == IEEE80211_MODE_11G && 313 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 314 mode = IEEE80211_MODE_11B; 315 } 316 ni->ni_txparms = &vap->iv_txparms[mode]; 317 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 318 } 319 320 static __inline void 321 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 322 { 323 /* propagate useful state */ 324 nbss->ni_authmode = obss->ni_authmode; 325 nbss->ni_txpower = obss->ni_txpower; 326 nbss->ni_vlan = obss->ni_vlan; 327 /* XXX statistics? */ 328 /* XXX legacy WDS bssid? */ 329 } 330 331 void 332 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 333 { 334 struct ieee80211com *ic = vap->iv_ic; 335 struct ieee80211_node *ni; 336 337 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 338 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 339 ieee80211_opmode_name[vap->iv_opmode], 340 ieee80211_chan2ieee(ic, chan), 341 ieee80211_channel_type_char(chan), 342 chan->ic_flags); 343 344 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 345 if (ni == NULL) { 346 /* XXX recovery? */ 347 return; 348 } 349 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 350 ni->ni_esslen = vap->iv_des_ssid[0].len; 351 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 352 if (vap->iv_bss != NULL) 353 copy_bss(ni, vap->iv_bss); 354 ni->ni_intval = ic->ic_bintval; 355 if (vap->iv_flags & IEEE80211_F_PRIVACY) 356 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 357 if (ic->ic_phytype == IEEE80211_T_FH) { 358 ni->ni_fhdwell = 200; /* XXX */ 359 ni->ni_fhindex = 1; 360 } 361 if (vap->iv_opmode == IEEE80211_M_IBSS) { 362 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 363 if (vap->iv_flags & IEEE80211_F_DESBSSID) 364 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 365 else { 366 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 367 /* clear group bit, add local bit */ 368 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 369 } 370 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 371 if (vap->iv_flags & IEEE80211_F_DESBSSID) 372 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 373 else 374 #ifdef IEEE80211_SUPPORT_TDMA 375 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 376 #endif 377 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 378 #ifdef IEEE80211_SUPPORT_MESH 379 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 380 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 381 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 382 #endif 383 } 384 /* 385 * Fix the channel and related attributes. 386 */ 387 /* clear DFS CAC state on previous channel */ 388 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 389 ic->ic_bsschan->ic_freq != chan->ic_freq && 390 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 391 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 392 ic->ic_bsschan = chan; 393 ieee80211_node_set_chan(ni, chan); 394 ic->ic_curmode = ieee80211_chan2mode(chan); 395 /* 396 * Do mode-specific setup. 397 */ 398 if (IEEE80211_IS_CHAN_FULL(chan)) { 399 if (IEEE80211_IS_CHAN_ANYG(chan)) { 400 /* 401 * Use a mixed 11b/11g basic rate set. 402 */ 403 ieee80211_setbasicrates(&ni->ni_rates, 404 IEEE80211_MODE_11G); 405 if (vap->iv_flags & IEEE80211_F_PUREG) { 406 /* 407 * Also mark OFDM rates basic so 11b 408 * stations do not join (WiFi compliance). 409 */ 410 ieee80211_addbasicrates(&ni->ni_rates, 411 IEEE80211_MODE_11A); 412 } 413 } else if (IEEE80211_IS_CHAN_B(chan)) { 414 /* 415 * Force pure 11b rate set. 416 */ 417 ieee80211_setbasicrates(&ni->ni_rates, 418 IEEE80211_MODE_11B); 419 } 420 } 421 422 /* XXX TODO: other bits and pieces - eg fast-frames? */ 423 424 /* If we're an 11n channel then initialise the 11n bits */ 425 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 426 /* XXX what else? */ 427 ieee80211_ht_node_init(ni); 428 ieee80211_vht_node_init(ni); 429 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 430 /* XXX what else? */ 431 ieee80211_ht_node_init(ni); 432 } 433 434 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 435 } 436 437 /* 438 * Reset bss state on transition to the INIT state. 439 * Clear any stations from the table (they have been 440 * deauth'd) and reset the bss node (clears key, rate 441 * etc. state). 442 */ 443 void 444 ieee80211_reset_bss(struct ieee80211vap *vap) 445 { 446 struct ieee80211com *ic = vap->iv_ic; 447 struct ieee80211_node *ni, *obss; 448 449 ieee80211_node_table_reset(&ic->ic_sta, vap); 450 /* XXX multi-bss: wrong */ 451 ieee80211_vap_reset_erp(vap); 452 453 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 454 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 455 obss = vap->iv_bss; 456 vap->iv_bss = ieee80211_ref_node(ni); 457 if (obss != NULL) { 458 copy_bss(ni, obss); 459 ni->ni_intval = ic->ic_bintval; 460 ieee80211_free_node(obss); 461 } else 462 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 463 } 464 465 static int 466 match_ssid(const struct ieee80211_node *ni, 467 int nssid, const struct ieee80211_scan_ssid ssids[]) 468 { 469 int i; 470 471 for (i = 0; i < nssid; i++) { 472 if (ni->ni_esslen == ssids[i].len && 473 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 474 return 1; 475 } 476 return 0; 477 } 478 479 /* 480 * Test a node for suitability/compatibility. 481 */ 482 static int 483 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 484 { 485 struct ieee80211com *ic = ni->ni_ic; 486 uint8_t rate; 487 488 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 489 return 0; 490 if (vap->iv_opmode == IEEE80211_M_IBSS) { 491 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 492 return 0; 493 } else { 494 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 495 return 0; 496 } 497 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 498 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 499 return 0; 500 } else { 501 /* XXX does this mean privacy is supported or required? */ 502 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 503 return 0; 504 } 505 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 506 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 507 if (rate & IEEE80211_RATE_BASIC) 508 return 0; 509 if (vap->iv_des_nssid != 0 && 510 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 511 return 0; 512 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 513 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 514 return 0; 515 return 1; 516 } 517 518 #ifdef IEEE80211_DEBUG 519 /* 520 * Display node suitability/compatibility. 521 */ 522 static void 523 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 524 { 525 struct ieee80211com *ic = ni->ni_ic; 526 uint8_t rate; 527 int fail; 528 529 fail = 0; 530 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 531 fail |= 0x01; 532 if (vap->iv_opmode == IEEE80211_M_IBSS) { 533 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 534 fail |= 0x02; 535 } else { 536 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 537 fail |= 0x02; 538 } 539 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 540 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 541 fail |= 0x04; 542 } else { 543 /* XXX does this mean privacy is supported or required? */ 544 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 545 fail |= 0x04; 546 } 547 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 548 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 549 if (rate & IEEE80211_RATE_BASIC) 550 fail |= 0x08; 551 if (vap->iv_des_nssid != 0 && 552 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 553 fail |= 0x10; 554 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 555 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 556 fail |= 0x20; 557 558 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 559 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 560 printf(" %3d%c", 561 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 562 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 563 fail & 0x08 ? '!' : ' '); 564 printf(" %4s%c", 565 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 566 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 567 "????", 568 fail & 0x02 ? '!' : ' '); 569 printf(" %3s%c ", 570 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 571 fail & 0x04 ? '!' : ' '); 572 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 573 printf("%s\n", fail & 0x10 ? "!" : ""); 574 } 575 #endif /* IEEE80211_DEBUG */ 576 577 578 int 579 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 580 { 581 struct ieee80211vap *vap = ni->ni_vap; 582 583 if (ni == vap->iv_bss || 584 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 585 /* unchanged, nothing to do */ 586 return 0; 587 } 588 589 if (!check_bss(vap, ni)) { 590 /* capabilities mismatch */ 591 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 592 "%s: merge failed, capabilities mismatch\n", __func__); 593 #ifdef IEEE80211_DEBUG 594 if (ieee80211_msg_assoc(vap)) 595 check_bss_debug(vap, ni); 596 #endif 597 vap->iv_stats.is_ibss_capmismatch++; 598 return 0; 599 } 600 601 return 1; 602 } 603 604 /* 605 * Check if the given node should populate the node table. 606 * 607 * We need to be in "see all beacons for all ssids" mode in order 608 * to do IBSS merges, however this means we will populate nodes for 609 * /all/ IBSS SSIDs, versus just the one we care about. 610 * 611 * So this check ensures the node can actually belong to our IBSS 612 * configuration. For now it simply checks the SSID. 613 */ 614 int 615 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 616 const struct ieee80211_scanparams *scan) 617 { 618 struct ieee80211vap *vap = ni->ni_vap; 619 int i; 620 621 /* 622 * If we have no SSID and no scan SSID, return OK. 623 */ 624 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 625 goto ok; 626 627 /* 628 * If we have one of (SSID, scan SSID) then return error. 629 */ 630 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 631 goto mismatch; 632 633 /* 634 * Double-check - we need scan SSID. 635 */ 636 if (scan->ssid == NULL) 637 goto mismatch; 638 639 /* 640 * Check if the scan SSID matches the SSID list for the VAP. 641 */ 642 for (i = 0; i < vap->iv_des_nssid; i++) { 643 644 /* Sanity length check */ 645 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 646 continue; 647 648 /* Note: SSID in the scan entry is the IE format */ 649 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 650 vap->iv_des_ssid[i].len) == 0) 651 goto ok; 652 } 653 654 mismatch: 655 return (0); 656 ok: 657 return (1); 658 } 659 660 /* 661 * Handle 802.11 ad hoc network merge. The 662 * convention, set by the Wireless Ethernet Compatibility Alliance 663 * (WECA), is that an 802.11 station will change its BSSID to match 664 * the "oldest" 802.11 ad hoc network, on the same channel, that 665 * has the station's desired SSID. The "oldest" 802.11 network 666 * sends beacons with the greatest TSF timestamp. 667 * 668 * The caller is assumed to validate TSF's before attempting a merge. 669 * 670 * Return !0 if the BSSID changed, 0 otherwise. 671 */ 672 int 673 ieee80211_ibss_merge(struct ieee80211_node *ni) 674 { 675 #ifdef IEEE80211_DEBUG 676 struct ieee80211vap *vap = ni->ni_vap; 677 struct ieee80211com *ic = ni->ni_ic; 678 #endif 679 680 if (! ieee80211_ibss_merge_check(ni)) 681 return 0; 682 683 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 684 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 685 ether_sprintf(ni->ni_bssid), 686 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 687 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 688 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 689 ); 690 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 691 } 692 693 /* 694 * Calculate HT channel promotion flags for all vaps. 695 * This assumes ni_chan have been setup for each vap. 696 */ 697 static int 698 gethtadjustflags(struct ieee80211com *ic) 699 { 700 struct ieee80211vap *vap; 701 int flags; 702 703 flags = 0; 704 /* XXX locking */ 705 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 706 if (vap->iv_state < IEEE80211_S_RUN) 707 continue; 708 switch (vap->iv_opmode) { 709 case IEEE80211_M_WDS: 710 case IEEE80211_M_STA: 711 case IEEE80211_M_AHDEMO: 712 case IEEE80211_M_HOSTAP: 713 case IEEE80211_M_IBSS: 714 case IEEE80211_M_MBSS: 715 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 716 break; 717 default: 718 break; 719 } 720 } 721 return flags; 722 } 723 724 /* 725 * Calculate VHT channel promotion flags for all vaps. 726 * This assumes ni_chan have been setup for each vap. 727 */ 728 static int 729 getvhtadjustflags(struct ieee80211com *ic) 730 { 731 struct ieee80211vap *vap; 732 int flags; 733 734 flags = 0; 735 /* XXX locking */ 736 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 737 if (vap->iv_state < IEEE80211_S_RUN) 738 continue; 739 switch (vap->iv_opmode) { 740 case IEEE80211_M_WDS: 741 case IEEE80211_M_STA: 742 case IEEE80211_M_AHDEMO: 743 case IEEE80211_M_HOSTAP: 744 case IEEE80211_M_IBSS: 745 case IEEE80211_M_MBSS: 746 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 747 break; 748 default: 749 break; 750 } 751 } 752 return flags; 753 } 754 755 /* 756 * Check if the current channel needs to change based on whether 757 * any vap's are using HT20/HT40. This is used to sync the state 758 * of ic_curchan after a channel width change on a running vap. 759 * 760 * Same applies for VHT. 761 */ 762 void 763 ieee80211_sync_curchan(struct ieee80211com *ic) 764 { 765 struct ieee80211_channel *c; 766 767 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 768 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 769 770 if (c != ic->ic_curchan) { 771 ic->ic_curchan = c; 772 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 773 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 774 IEEE80211_UNLOCK(ic); 775 ic->ic_set_channel(ic); 776 ieee80211_radiotap_chan_change(ic); 777 IEEE80211_LOCK(ic); 778 } 779 } 780 781 /* 782 * Setup the current channel. The request channel may be 783 * promoted if other vap's are operating with HT20/HT40. 784 */ 785 void 786 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 787 { 788 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 789 int flags = gethtadjustflags(ic); 790 /* 791 * Check for channel promotion required to support the 792 * set of running vap's. This assumes we are called 793 * after ni_chan is setup for each vap. 794 */ 795 /* XXX VHT? */ 796 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 797 if (flags > ieee80211_htchanflags(c)) 798 c = ieee80211_ht_adjust_channel(ic, c, flags); 799 } 800 801 /* 802 * VHT promotion - this will at least promote to VHT20/40 803 * based on what HT has done; it may further promote the 804 * channel to VHT80 or above. 805 */ 806 if (ic->ic_vhtcaps != 0) { 807 int flags = getvhtadjustflags(ic); 808 if (flags > ieee80211_vhtchanflags(c)) 809 c = ieee80211_vht_adjust_channel(ic, c, flags); 810 } 811 812 ic->ic_bsschan = ic->ic_curchan = c; 813 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 814 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 815 } 816 817 /* 818 * Change the current channel. The channel change is guaranteed to have 819 * happened before the next state change. 820 */ 821 void 822 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 823 { 824 ieee80211_setupcurchan(ic, c); 825 ieee80211_runtask(ic, &ic->ic_chan_task); 826 } 827 828 void 829 ieee80211_update_chw(struct ieee80211com *ic) 830 { 831 832 ieee80211_setupcurchan(ic, ic->ic_curchan); 833 ieee80211_runtask(ic, &ic->ic_chw_task); 834 } 835 836 /* 837 * Join the specified IBSS/BSS network. The node is assumed to 838 * be passed in with a held reference. 839 */ 840 static int 841 ieee80211_sta_join1(struct ieee80211_node *selbs) 842 { 843 struct ieee80211vap *vap = selbs->ni_vap; 844 struct ieee80211com *ic = selbs->ni_ic; 845 struct ieee80211_node *obss; 846 int canreassoc; 847 848 /* 849 * Committed to selbs, setup state. 850 */ 851 obss = vap->iv_bss; 852 /* 853 * Check if old+new node have the same address in which 854 * case we can reassociate when operating in sta mode. 855 */ 856 canreassoc = (obss != NULL && 857 vap->iv_state == IEEE80211_S_RUN && 858 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 859 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 860 if (obss != NULL) { 861 struct ieee80211_node_table *nt = obss->ni_table; 862 863 copy_bss(selbs, obss); 864 ieee80211_node_decref(obss); /* iv_bss reference */ 865 866 IEEE80211_NODE_LOCK(nt); 867 node_reclaim(nt, obss); /* station table reference */ 868 IEEE80211_NODE_UNLOCK(nt); 869 870 obss = NULL; /* NB: guard against later use */ 871 } 872 873 /* 874 * Delete unusable rates; we've already checked 875 * that the negotiated rate set is acceptable. 876 */ 877 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 878 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 879 880 ieee80211_setcurchan(ic, selbs->ni_chan); 881 /* 882 * Set the erp state (mostly the slot time) to deal with 883 * the auto-select case; this should be redundant if the 884 * mode is locked. 885 */ 886 ieee80211_vap_reset_erp(vap); 887 ieee80211_wme_initparams(vap); 888 889 if (vap->iv_opmode == IEEE80211_M_STA) { 890 if (canreassoc) { 891 /* Reassociate */ 892 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 893 } else { 894 /* 895 * Act as if we received a DEAUTH frame in case we 896 * are invoked from the RUN state. This will cause 897 * us to try to re-authenticate if we are operating 898 * as a station. 899 */ 900 ieee80211_new_state(vap, IEEE80211_S_AUTH, 901 IEEE80211_FC0_SUBTYPE_DEAUTH); 902 } 903 } else 904 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 905 return 1; 906 } 907 908 int 909 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 910 const struct ieee80211_scan_entry *se) 911 { 912 struct ieee80211com *ic = vap->iv_ic; 913 struct ieee80211_node *ni; 914 int do_ht = 0; 915 916 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 917 if (ni == NULL) { 918 /* XXX msg */ 919 return 0; 920 } 921 922 /* 923 * Expand scan state into node's format. 924 * XXX may not need all this stuff 925 */ 926 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 927 ni->ni_esslen = se->se_ssid[1]; 928 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 929 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 930 ni->ni_intval = se->se_intval; 931 ni->ni_capinfo = se->se_capinfo; 932 ni->ni_chan = chan; 933 ni->ni_timoff = se->se_timoff; 934 ni->ni_fhdwell = se->se_fhdwell; 935 ni->ni_fhindex = se->se_fhindex; 936 ni->ni_erp = se->se_erp; 937 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 938 ni->ni_noise = se->se_noise; 939 if (vap->iv_opmode == IEEE80211_M_STA) { 940 /* NB: only infrastructure mode requires an associd */ 941 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 942 } 943 944 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 945 ieee80211_ies_expand(&ni->ni_ies); 946 #ifdef IEEE80211_SUPPORT_SUPERG 947 if (ni->ni_ies.ath_ie != NULL) 948 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 949 #endif 950 if (ni->ni_ies.htcap_ie != NULL) 951 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 952 if (ni->ni_ies.htinfo_ie != NULL) 953 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 954 #ifdef IEEE80211_SUPPORT_MESH 955 if (ni->ni_ies.meshid_ie != NULL) 956 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 957 #endif 958 #ifdef IEEE80211_SUPPORT_TDMA 959 if (ni->ni_ies.tdma_ie != NULL) 960 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 961 #endif 962 if (ni->ni_ies.vhtcap_ie != NULL) 963 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 964 if (ni->ni_ies.vhtopmode_ie != NULL) 965 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 966 967 /* XXX parse BSSLOAD IE */ 968 /* XXX parse TXPWRENV IE */ 969 /* XXX parse APCHANREP IE */ 970 } 971 972 vap->iv_dtim_period = se->se_dtimperiod; 973 vap->iv_dtim_count = 0; 974 975 /* NB: must be after ni_chan is setup */ 976 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 977 IEEE80211_F_DOSORT); 978 if (ieee80211_iserp_rateset(&ni->ni_rates)) 979 ni->ni_flags |= IEEE80211_NODE_ERP; 980 981 /* 982 * Setup HT state for this node if it's available, otherwise 983 * non-STA modes won't pick this state up. 984 * 985 * For IBSS and related modes that don't go through an 986 * association request/response, the only appropriate place 987 * to setup the HT state is here. 988 */ 989 if (ni->ni_ies.htinfo_ie != NULL && 990 ni->ni_ies.htcap_ie != NULL && 991 vap->iv_flags_ht & IEEE80211_FHT_HT) { 992 ieee80211_ht_node_init(ni); 993 ieee80211_ht_updateparams(ni, 994 ni->ni_ies.htcap_ie, 995 ni->ni_ies.htinfo_ie); 996 do_ht = 1; 997 } 998 999 /* 1000 * Setup VHT state for this node if it's available. 1001 * Same as the above. 1002 * 1003 * For now, don't allow 2GHz VHT operation. 1004 */ 1005 if (ni->ni_ies.vhtopmode_ie != NULL && 1006 ni->ni_ies.vhtcap_ie != NULL && 1007 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1008 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1009 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1010 __func__, 1011 ni->ni_macaddr, 1012 ":"); 1013 } else { 1014 ieee80211_vht_node_init(ni); 1015 ieee80211_vht_updateparams(ni, 1016 ni->ni_ies.vhtcap_ie, 1017 ni->ni_ies.vhtopmode_ie); 1018 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1019 ni->ni_ies.vhtopmode_ie); 1020 do_ht = 1; 1021 } 1022 } 1023 1024 /* Finally do the node channel change */ 1025 if (do_ht) { 1026 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1027 ni->ni_ies.htinfo_ie); 1028 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1029 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1030 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1031 } 1032 1033 /* XXX else check for ath FF? */ 1034 /* XXX QoS? Difficult given that WME config is specific to a master */ 1035 1036 ieee80211_node_setuptxparms(ni); 1037 ieee80211_ratectl_node_init(ni); 1038 1039 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1040 } 1041 1042 /* 1043 * Leave the specified IBSS/BSS network. The node is assumed to 1044 * be passed in with a held reference. 1045 */ 1046 void 1047 ieee80211_sta_leave(struct ieee80211_node *ni) 1048 { 1049 struct ieee80211com *ic = ni->ni_ic; 1050 1051 ic->ic_node_cleanup(ni); 1052 ieee80211_notify_node_leave(ni); 1053 } 1054 1055 /* 1056 * Send a deauthenticate frame and drop the station. 1057 */ 1058 void 1059 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1060 { 1061 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1062 ieee80211_ref_node(ni); 1063 if (ni->ni_associd != 0) 1064 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1065 ieee80211_node_leave(ni); 1066 ieee80211_free_node(ni); 1067 } 1068 1069 static struct ieee80211_node * 1070 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1071 { 1072 struct ieee80211_node *ni; 1073 1074 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1075 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1076 return ni; 1077 } 1078 1079 static int 1080 node_init(struct ieee80211_node *ni) 1081 { 1082 return 0; 1083 } 1084 1085 /* 1086 * Initialize an ie blob with the specified data. If previous 1087 * data exists re-use the data block. As a side effect we clear 1088 * all references to specific ie's; the caller is required to 1089 * recalculate them. 1090 */ 1091 int 1092 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1093 { 1094 /* NB: assumes data+len are the last fields */ 1095 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1096 if (ies->data != NULL && ies->len != len) { 1097 /* data size changed */ 1098 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1099 ies->data = NULL; 1100 } 1101 if (ies->data == NULL) { 1102 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1103 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1104 if (ies->data == NULL) { 1105 ies->len = 0; 1106 /* NB: pointers have already been zero'd above */ 1107 return 0; 1108 } 1109 } 1110 memcpy(ies->data, data, len); 1111 ies->len = len; 1112 return 1; 1113 } 1114 1115 /* 1116 * Reclaim storage for an ie blob. 1117 */ 1118 void 1119 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1120 { 1121 if (ies->data != NULL) 1122 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1123 } 1124 1125 /* 1126 * Expand an ie blob data contents and to fillin individual 1127 * ie pointers. The data blob is assumed to be well-formed; 1128 * we don't do any validity checking of ie lengths. 1129 */ 1130 void 1131 ieee80211_ies_expand(struct ieee80211_ies *ies) 1132 { 1133 uint8_t *ie; 1134 int ielen; 1135 1136 ie = ies->data; 1137 ielen = ies->len; 1138 while (ielen > 0) { 1139 switch (ie[0]) { 1140 case IEEE80211_ELEMID_VENDOR: 1141 if (iswpaoui(ie)) 1142 ies->wpa_ie = ie; 1143 else if (iswmeoui(ie)) 1144 ies->wme_ie = ie; 1145 #ifdef IEEE80211_SUPPORT_SUPERG 1146 else if (isatherosoui(ie)) 1147 ies->ath_ie = ie; 1148 #endif 1149 #ifdef IEEE80211_SUPPORT_TDMA 1150 else if (istdmaoui(ie)) 1151 ies->tdma_ie = ie; 1152 #endif 1153 break; 1154 case IEEE80211_ELEMID_RSN: 1155 ies->rsn_ie = ie; 1156 break; 1157 case IEEE80211_ELEMID_HTCAP: 1158 ies->htcap_ie = ie; 1159 break; 1160 case IEEE80211_ELEMID_HTINFO: 1161 ies->htinfo_ie = ie; 1162 break; 1163 #ifdef IEEE80211_SUPPORT_MESH 1164 case IEEE80211_ELEMID_MESHID: 1165 ies->meshid_ie = ie; 1166 break; 1167 #endif 1168 case IEEE80211_ELEMID_VHT_CAP: 1169 ies->vhtcap_ie = ie; 1170 break; 1171 case IEEE80211_ELEMID_VHT_OPMODE: 1172 ies->vhtopmode_ie = ie; 1173 break; 1174 case IEEE80211_ELEMID_VHT_PWR_ENV: 1175 ies->vhtpwrenv_ie = ie; 1176 break; 1177 case IEEE80211_ELEMID_BSSLOAD: 1178 ies->bssload_ie = ie; 1179 break; 1180 case IEEE80211_ELEMID_APCHANREP: 1181 ies->apchanrep_ie = ie; 1182 break; 1183 } 1184 ielen -= 2 + ie[1]; 1185 ie += 2 + ie[1]; 1186 } 1187 } 1188 1189 /* 1190 * Reclaim any resources in a node and reset any critical 1191 * state. Typically nodes are free'd immediately after, 1192 * but in some cases the storage may be reused so we need 1193 * to insure consistent state (should probably fix that). 1194 */ 1195 static void 1196 node_cleanup(struct ieee80211_node *ni) 1197 { 1198 struct ieee80211vap *vap = ni->ni_vap; 1199 struct ieee80211com *ic = ni->ni_ic; 1200 int i; 1201 1202 /* NB: preserve ni_table */ 1203 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1204 if (vap->iv_opmode != IEEE80211_M_STA) 1205 vap->iv_ps_sta--; 1206 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1207 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1208 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1209 } 1210 /* 1211 * Cleanup any VHT and HT-related state. 1212 */ 1213 if (ni->ni_flags & IEEE80211_NODE_VHT) 1214 ieee80211_vht_node_cleanup(ni); 1215 if (ni->ni_flags & IEEE80211_NODE_HT) 1216 ieee80211_ht_node_cleanup(ni); 1217 #ifdef IEEE80211_SUPPORT_SUPERG 1218 /* Always do FF node cleanup; for A-MSDU */ 1219 ieee80211_ff_node_cleanup(ni); 1220 #endif 1221 #ifdef IEEE80211_SUPPORT_MESH 1222 /* 1223 * Cleanup any mesh-related state. 1224 */ 1225 if (vap->iv_opmode == IEEE80211_M_MBSS) 1226 ieee80211_mesh_node_cleanup(ni); 1227 #endif 1228 /* 1229 * Clear any staging queue entries. 1230 */ 1231 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1232 1233 /* 1234 * Clear AREF flag that marks the authorization refcnt bump 1235 * has happened. This is probably not needed as the node 1236 * should always be removed from the table so not found but 1237 * do it just in case. 1238 * Likewise clear the ASSOCID flag as these flags are intended 1239 * to be managed in tandem. 1240 */ 1241 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1242 1243 /* 1244 * Drain power save queue and, if needed, clear TIM. 1245 */ 1246 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1247 vap->iv_set_tim(ni, 0); 1248 1249 ni->ni_associd = 0; 1250 if (ni->ni_challenge != NULL) { 1251 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1252 ni->ni_challenge = NULL; 1253 } 1254 /* 1255 * Preserve SSID, WPA, and WME ie's so the bss node is 1256 * reusable during a re-auth/re-assoc state transition. 1257 * If we remove these data they will not be recreated 1258 * because they come from a probe-response or beacon frame 1259 * which cannot be expected prior to the association-response. 1260 * This should not be an issue when operating in other modes 1261 * as stations leaving always go through a full state transition 1262 * which will rebuild this state. 1263 * 1264 * XXX does this leave us open to inheriting old state? 1265 */ 1266 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1267 if (ni->ni_rxfrag[i] != NULL) { 1268 m_freem(ni->ni_rxfrag[i]); 1269 ni->ni_rxfrag[i] = NULL; 1270 } 1271 /* 1272 * Must be careful here to remove any key map entry w/o a LOR. 1273 */ 1274 ieee80211_node_delucastkey(ni); 1275 } 1276 1277 static void 1278 node_free(struct ieee80211_node *ni) 1279 { 1280 struct ieee80211com *ic = ni->ni_ic; 1281 1282 ieee80211_ratectl_node_deinit(ni); 1283 ic->ic_node_cleanup(ni); 1284 ieee80211_ies_cleanup(&ni->ni_ies); 1285 ieee80211_psq_cleanup(&ni->ni_psq); 1286 IEEE80211_FREE(ni, M_80211_NODE); 1287 } 1288 1289 static void 1290 node_age(struct ieee80211_node *ni) 1291 { 1292 struct ieee80211vap *vap = ni->ni_vap; 1293 1294 /* 1295 * Age frames on the power save queue. 1296 */ 1297 if (ieee80211_node_psq_age(ni) != 0 && 1298 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1299 vap->iv_set_tim(ni, 0); 1300 /* 1301 * Age out HT resources (e.g. frames on the 1302 * A-MPDU reorder queues). 1303 */ 1304 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1305 ieee80211_ht_node_age(ni); 1306 } 1307 1308 static int8_t 1309 node_getrssi(const struct ieee80211_node *ni) 1310 { 1311 uint32_t avgrssi = ni->ni_avgrssi; 1312 int32_t rssi; 1313 1314 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1315 return 0; 1316 rssi = IEEE80211_RSSI_GET(avgrssi); 1317 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1318 } 1319 1320 static void 1321 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1322 { 1323 *rssi = node_getrssi(ni); 1324 *noise = ni->ni_noise; 1325 } 1326 1327 static void 1328 node_getmimoinfo(const struct ieee80211_node *ni, 1329 struct ieee80211_mimo_info *info) 1330 { 1331 int i; 1332 uint32_t avgrssi; 1333 int32_t rssi; 1334 1335 bzero(info, sizeof(*info)); 1336 1337 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1338 /* Note: for now, just pri20 channel info */ 1339 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1340 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1341 info->ch[i].rssi[0] = 0; 1342 } else { 1343 rssi = IEEE80211_RSSI_GET(avgrssi); 1344 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1345 } 1346 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1347 } 1348 1349 /* XXX ext radios? */ 1350 1351 /* XXX EVM? */ 1352 } 1353 1354 static void 1355 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1356 struct ieee80211_node *ni) 1357 { 1358 struct ieee80211com *ic = nt->nt_ic; 1359 int hash; 1360 1361 IEEE80211_NODE_LOCK_ASSERT(nt); 1362 1363 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1364 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1365 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1366 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1367 nt->nt_count++; 1368 ni->ni_table = nt; 1369 } 1370 1371 static void 1372 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1373 struct ieee80211_node *ni) 1374 { 1375 1376 IEEE80211_NODE_LOCK_ASSERT(nt); 1377 1378 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1379 LIST_REMOVE(ni, ni_hash); 1380 nt->nt_count--; 1381 KASSERT(nt->nt_count >= 0, 1382 ("nt_count is negative (%d)!\n", nt->nt_count)); 1383 ni->ni_table = NULL; 1384 } 1385 1386 struct ieee80211_node * 1387 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1388 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1389 { 1390 struct ieee80211com *ic = nt->nt_ic; 1391 struct ieee80211_node *ni; 1392 1393 ni = ic->ic_node_alloc(vap, macaddr); 1394 if (ni == NULL) { 1395 vap->iv_stats.is_rx_nodealloc++; 1396 return NULL; 1397 } 1398 1399 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1400 "%s %p<%s> in %s table\n", __func__, ni, 1401 ether_sprintf(macaddr), nt->nt_name); 1402 1403 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1404 ieee80211_node_initref(ni); /* mark referenced */ 1405 ni->ni_chan = IEEE80211_CHAN_ANYC; 1406 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1407 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1408 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1409 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1410 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1411 ni->ni_inact_reload = nt->nt_inact_init; 1412 ni->ni_inact = ni->ni_inact_reload; 1413 ni->ni_ath_defkeyix = 0x7fff; 1414 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1415 #ifdef IEEE80211_SUPPORT_MESH 1416 if (vap->iv_opmode == IEEE80211_M_MBSS) 1417 ieee80211_mesh_node_init(vap, ni); 1418 #endif 1419 IEEE80211_NODE_LOCK(nt); 1420 ieee80211_add_node_nt(nt, ni); 1421 ni->ni_vap = vap; 1422 ni->ni_ic = ic; 1423 IEEE80211_NODE_UNLOCK(nt); 1424 1425 /* handle failure; free node state */ 1426 if (ic->ic_node_init(ni) != 0) { 1427 vap->iv_stats.is_rx_nodealloc++; 1428 ieee80211_psq_cleanup(&ni->ni_psq); 1429 ieee80211_ratectl_node_deinit(ni); 1430 _ieee80211_free_node(ni); 1431 return NULL; 1432 } 1433 1434 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1435 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1436 1437 return ni; 1438 } 1439 1440 /* 1441 * Craft a temporary node suitable for sending a management frame 1442 * to the specified station. We craft only as much state as we 1443 * need to do the work since the node will be immediately reclaimed 1444 * once the send completes. 1445 */ 1446 struct ieee80211_node * 1447 ieee80211_tmp_node(struct ieee80211vap *vap, 1448 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1449 { 1450 struct ieee80211com *ic = vap->iv_ic; 1451 struct ieee80211_node *ni; 1452 1453 ni = ic->ic_node_alloc(vap, macaddr); 1454 if (ni != NULL) { 1455 struct ieee80211_node *bss = vap->iv_bss; 1456 1457 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1458 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1459 1460 ni->ni_table = NULL; /* NB: pedantic */ 1461 ni->ni_ic = ic; /* NB: needed to set channel */ 1462 ni->ni_vap = vap; 1463 1464 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1465 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1466 ieee80211_node_initref(ni); /* mark referenced */ 1467 /* NB: required by ieee80211_fix_rate */ 1468 ieee80211_node_set_chan(ni, bss->ni_chan); 1469 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1470 IEEE80211_KEYIX_NONE); 1471 ni->ni_txpower = bss->ni_txpower; 1472 /* XXX optimize away */ 1473 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1474 1475 ieee80211_ratectl_node_init(ni); 1476 1477 /* handle failure; free node state */ 1478 if (ic->ic_node_init(ni) != 0) { 1479 vap->iv_stats.is_rx_nodealloc++; 1480 ieee80211_psq_cleanup(&ni->ni_psq); 1481 ieee80211_ratectl_node_deinit(ni); 1482 _ieee80211_free_node(ni); 1483 return NULL; 1484 } 1485 1486 } else { 1487 /* XXX msg */ 1488 vap->iv_stats.is_rx_nodealloc++; 1489 } 1490 return ni; 1491 } 1492 1493 struct ieee80211_node * 1494 ieee80211_dup_bss(struct ieee80211vap *vap, 1495 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1496 { 1497 struct ieee80211com *ic = vap->iv_ic; 1498 struct ieee80211_node *ni; 1499 1500 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1501 if (ni != NULL) { 1502 struct ieee80211_node *bss = vap->iv_bss; 1503 /* 1504 * Inherit from iv_bss. 1505 */ 1506 copy_bss(ni, bss); 1507 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1508 ieee80211_node_set_chan(ni, bss->ni_chan); 1509 } 1510 return ni; 1511 } 1512 1513 /* 1514 * Create a bss node for a legacy WDS vap. The far end does 1515 * not associate so we just create create a new node and 1516 * simulate an association. The caller is responsible for 1517 * installing the node as the bss node and handling any further 1518 * setup work like authorizing the port. 1519 */ 1520 struct ieee80211_node * 1521 ieee80211_node_create_wds(struct ieee80211vap *vap, 1522 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1523 { 1524 struct ieee80211com *ic = vap->iv_ic; 1525 struct ieee80211_node *ni; 1526 1527 /* XXX check if node already in sta table? */ 1528 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1529 if (ni != NULL) { 1530 ni->ni_wdsvap = vap; 1531 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1532 /* 1533 * Inherit any manually configured settings. 1534 */ 1535 copy_bss(ni, vap->iv_bss); 1536 ieee80211_node_set_chan(ni, chan); 1537 /* NB: propagate ssid so available to WPA supplicant */ 1538 ni->ni_esslen = vap->iv_des_ssid[0].len; 1539 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1540 /* NB: no associd for peer */ 1541 /* 1542 * There are no management frames to use to 1543 * discover neighbor capabilities, so blindly 1544 * propagate the local configuration. 1545 */ 1546 if (vap->iv_flags & IEEE80211_F_WME) 1547 ni->ni_flags |= IEEE80211_NODE_QOS; 1548 #ifdef IEEE80211_SUPPORT_SUPERG 1549 if (vap->iv_flags & IEEE80211_F_FF) 1550 ni->ni_flags |= IEEE80211_NODE_FF; 1551 #endif 1552 /* XXX VHT */ 1553 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1554 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1555 /* 1556 * Device is HT-capable and HT is enabled for 1557 * the vap; setup HT operation. On return 1558 * ni_chan will be adjusted to an HT channel. 1559 */ 1560 ieee80211_ht_wds_init(ni); 1561 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1562 printf("%s: TODO: vht_wds_init\n", __func__); 1563 } 1564 } else { 1565 struct ieee80211_channel *c = ni->ni_chan; 1566 /* 1567 * Force a legacy channel to be used. 1568 */ 1569 c = ieee80211_find_channel(ic, 1570 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1571 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1572 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1573 ni->ni_chan = c; 1574 } 1575 } 1576 return ni; 1577 } 1578 1579 struct ieee80211_node * 1580 #ifdef IEEE80211_DEBUG_REFCNT 1581 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1582 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1583 #else 1584 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1585 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1586 #endif 1587 { 1588 struct ieee80211_node *ni; 1589 int hash; 1590 1591 IEEE80211_NODE_LOCK_ASSERT(nt); 1592 1593 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1594 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1595 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1596 ieee80211_ref_node(ni); /* mark referenced */ 1597 #ifdef IEEE80211_DEBUG_REFCNT 1598 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1599 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1600 func, line, 1601 ni, ether_sprintf(ni->ni_macaddr), 1602 ieee80211_node_refcnt(ni)); 1603 #endif 1604 return ni; 1605 } 1606 } 1607 return NULL; 1608 } 1609 1610 struct ieee80211_node * 1611 #ifdef IEEE80211_DEBUG_REFCNT 1612 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1613 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1614 #else 1615 ieee80211_find_node(struct ieee80211_node_table *nt, 1616 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1617 #endif 1618 { 1619 struct ieee80211_node *ni; 1620 1621 IEEE80211_NODE_LOCK(nt); 1622 ni = ieee80211_find_node_locked(nt, macaddr); 1623 IEEE80211_NODE_UNLOCK(nt); 1624 return ni; 1625 } 1626 1627 struct ieee80211_node * 1628 #ifdef IEEE80211_DEBUG_REFCNT 1629 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1630 const struct ieee80211vap *vap, 1631 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1632 #else 1633 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1634 const struct ieee80211vap *vap, 1635 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1636 #endif 1637 { 1638 struct ieee80211_node *ni; 1639 int hash; 1640 1641 IEEE80211_NODE_LOCK_ASSERT(nt); 1642 1643 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1644 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1645 if (ni->ni_vap == vap && 1646 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1647 ieee80211_ref_node(ni); /* mark referenced */ 1648 #ifdef IEEE80211_DEBUG_REFCNT 1649 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1650 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1651 func, line, 1652 ni, ether_sprintf(ni->ni_macaddr), 1653 ieee80211_node_refcnt(ni)); 1654 #endif 1655 return ni; 1656 } 1657 } 1658 return NULL; 1659 } 1660 1661 struct ieee80211_node * 1662 #ifdef IEEE80211_DEBUG_REFCNT 1663 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1664 const struct ieee80211vap *vap, 1665 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1666 #else 1667 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1668 const struct ieee80211vap *vap, 1669 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1670 #endif 1671 { 1672 struct ieee80211_node *ni; 1673 1674 IEEE80211_NODE_LOCK(nt); 1675 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1676 IEEE80211_NODE_UNLOCK(nt); 1677 return ni; 1678 } 1679 1680 /* 1681 * Fake up a node; this handles node discovery in adhoc mode. 1682 * Note that for the driver's benefit we we treat this like 1683 * an association so the driver has an opportunity to setup 1684 * it's private state. 1685 */ 1686 struct ieee80211_node * 1687 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1688 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1689 { 1690 struct ieee80211_node *ni; 1691 1692 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1693 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1694 ni = ieee80211_dup_bss(vap, macaddr); 1695 if (ni != NULL) { 1696 struct ieee80211com *ic = vap->iv_ic; 1697 1698 /* XXX no rate negotiation; just dup */ 1699 ni->ni_rates = vap->iv_bss->ni_rates; 1700 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1701 ni->ni_flags |= IEEE80211_NODE_ERP; 1702 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1703 /* 1704 * In adhoc demo mode there are no management 1705 * frames to use to discover neighbor capabilities, 1706 * so blindly propagate the local configuration 1707 * so we can do interesting things (e.g. use 1708 * WME to disable ACK's). 1709 */ 1710 /* 1711 * XXX TODO: 11n? 1712 */ 1713 if (vap->iv_flags & IEEE80211_F_WME) 1714 ni->ni_flags |= IEEE80211_NODE_QOS; 1715 #ifdef IEEE80211_SUPPORT_SUPERG 1716 if (vap->iv_flags & IEEE80211_F_FF) 1717 ni->ni_flags |= IEEE80211_NODE_FF; 1718 #endif 1719 } 1720 ieee80211_node_setuptxparms(ni); 1721 ieee80211_ratectl_node_init(ni); 1722 1723 /* 1724 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1725 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1726 * that after we hear that we can indeed do 11n 1727 * (either by a beacon frame or by a probe response.) 1728 */ 1729 1730 /* 1731 * This is the first time we see the node. 1732 */ 1733 if (ic->ic_newassoc != NULL) 1734 ic->ic_newassoc(ni, 1); 1735 1736 /* 1737 * Kick off a probe request to the given node; 1738 * we will then use the probe response to update 1739 * 11n/etc configuration state. 1740 * 1741 * XXX TODO: this isn't guaranteed, and until we get 1742 * a probe response, we won't be able to actually 1743 * do anything 802.11n related to the node. 1744 * So if this does indeed work, maybe we should hold 1745 * off on sending responses until we get the probe 1746 * response, or just default to some sensible subset 1747 * of 802.11n behaviour (eg always allow aggregation 1748 * negotiation TO us, but not FROM us, etc) so we 1749 * aren't entirely busted. 1750 */ 1751 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1752 ieee80211_send_probereq(ni, /* node */ 1753 vap->iv_myaddr, /* SA */ 1754 ni->ni_macaddr, /* DA */ 1755 vap->iv_bss->ni_bssid, /* BSSID */ 1756 vap->iv_bss->ni_essid, 1757 vap->iv_bss->ni_esslen); /* SSID */ 1758 } 1759 1760 /* XXX not right for 802.1x/WPA */ 1761 ieee80211_node_authorize(ni); 1762 } 1763 return ni; 1764 } 1765 1766 void 1767 ieee80211_init_neighbor(struct ieee80211_node *ni, 1768 const struct ieee80211_frame *wh, 1769 const struct ieee80211_scanparams *sp) 1770 { 1771 int do_ht_setup = 0, do_vht_setup = 0; 1772 1773 ni->ni_esslen = sp->ssid[1]; 1774 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1775 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1776 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1777 ni->ni_intval = sp->bintval; 1778 ni->ni_capinfo = sp->capinfo; 1779 ni->ni_chan = ni->ni_ic->ic_curchan; 1780 ni->ni_fhdwell = sp->fhdwell; 1781 ni->ni_fhindex = sp->fhindex; 1782 ni->ni_erp = sp->erp; 1783 ni->ni_timoff = sp->timoff; 1784 #ifdef IEEE80211_SUPPORT_MESH 1785 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1786 ieee80211_mesh_init_neighbor(ni, wh, sp); 1787 #endif 1788 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1789 ieee80211_ies_expand(&ni->ni_ies); 1790 if (ni->ni_ies.wme_ie != NULL) 1791 ni->ni_flags |= IEEE80211_NODE_QOS; 1792 else 1793 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1794 #ifdef IEEE80211_SUPPORT_SUPERG 1795 if (ni->ni_ies.ath_ie != NULL) 1796 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1797 #endif 1798 if (ni->ni_ies.htcap_ie != NULL) 1799 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1800 if (ni->ni_ies.htinfo_ie != NULL) 1801 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1802 1803 if (ni->ni_ies.vhtcap_ie != NULL) 1804 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1805 if (ni->ni_ies.vhtopmode_ie != NULL) 1806 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1807 1808 if ((ni->ni_ies.htcap_ie != NULL) && 1809 (ni->ni_ies.htinfo_ie != NULL) && 1810 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1811 do_ht_setup = 1; 1812 } 1813 1814 if ((ni->ni_ies.vhtcap_ie != NULL) && 1815 (ni->ni_ies.vhtopmode_ie != NULL) && 1816 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1817 do_vht_setup = 1; 1818 } 1819 1820 } 1821 1822 /* NB: must be after ni_chan is setup */ 1823 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1824 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1825 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1826 1827 /* 1828 * If the neighbor is HT compatible, flip that on. 1829 */ 1830 if (do_ht_setup) { 1831 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1832 "%s: doing HT setup\n", __func__); 1833 ieee80211_ht_node_init(ni); 1834 ieee80211_ht_updateparams(ni, 1835 ni->ni_ies.htcap_ie, 1836 ni->ni_ies.htinfo_ie); 1837 1838 if (do_vht_setup) { 1839 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1840 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1841 __func__, 1842 ni->ni_macaddr, 1843 ":"); 1844 } else { 1845 ieee80211_vht_node_init(ni); 1846 ieee80211_vht_updateparams(ni, 1847 ni->ni_ies.vhtcap_ie, 1848 ni->ni_ies.vhtopmode_ie); 1849 ieee80211_setup_vht_rates(ni, 1850 ni->ni_ies.vhtcap_ie, 1851 ni->ni_ies.vhtopmode_ie); 1852 } 1853 } 1854 1855 /* 1856 * Finally do the channel upgrade/change based 1857 * on the HT/VHT configuration. 1858 */ 1859 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1860 ni->ni_ies.htinfo_ie); 1861 ieee80211_setup_htrates(ni, 1862 ni->ni_ies.htcap_ie, 1863 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1864 ieee80211_setup_basic_htrates(ni, 1865 ni->ni_ies.htinfo_ie); 1866 1867 ieee80211_node_setuptxparms(ni); 1868 ieee80211_ratectl_node_init(ni); 1869 1870 /* Reassociate; we're now 11n/11ac */ 1871 /* 1872 * XXX TODO: this is the wrong thing to do - 1873 * we're calling it with isnew=1 so the ath(4) 1874 * driver reinitialises the rate tables. 1875 * This "mostly" works for ath(4), but it won't 1876 * be right for firmware devices which allocate 1877 * node states. 1878 * 1879 * So, do we just create a new node and delete 1880 * the old one? Or? 1881 */ 1882 if (ni->ni_ic->ic_newassoc) 1883 ni->ni_ic->ic_newassoc(ni, 1); 1884 } 1885 } 1886 1887 /* 1888 * Do node discovery in adhoc mode on receipt of a beacon 1889 * or probe response frame. Note that for the driver's 1890 * benefit we we treat this like an association so the 1891 * driver has an opportunity to setup it's private state. 1892 */ 1893 struct ieee80211_node * 1894 ieee80211_add_neighbor(struct ieee80211vap *vap, 1895 const struct ieee80211_frame *wh, 1896 const struct ieee80211_scanparams *sp) 1897 { 1898 struct ieee80211_node *ni; 1899 1900 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1901 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1902 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1903 if (ni != NULL) { 1904 struct ieee80211com *ic = vap->iv_ic; 1905 1906 ieee80211_init_neighbor(ni, wh, sp); 1907 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1908 ni->ni_flags |= IEEE80211_NODE_ERP; 1909 ieee80211_node_setuptxparms(ni); 1910 ieee80211_ratectl_node_init(ni); 1911 if (ic->ic_newassoc != NULL) 1912 ic->ic_newassoc(ni, 1); 1913 /* XXX not right for 802.1x/WPA */ 1914 ieee80211_node_authorize(ni); 1915 } 1916 return ni; 1917 } 1918 1919 #define IS_PROBEREQ(wh) \ 1920 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1921 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1922 #define IS_BCAST_PROBEREQ(wh) \ 1923 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1924 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1925 1926 static __inline struct ieee80211_node * 1927 _find_rxnode(struct ieee80211_node_table *nt, 1928 const struct ieee80211_frame_min *wh) 1929 { 1930 if (IS_BCAST_PROBEREQ(wh)) 1931 return NULL; /* spam bcast probe req to all vap's */ 1932 return ieee80211_find_node_locked(nt, wh->i_addr2); 1933 } 1934 1935 /* 1936 * Locate the node for sender, track state, and then pass the 1937 * (referenced) node up to the 802.11 layer for its use. Note 1938 * we can return NULL if the sender is not in the table. 1939 */ 1940 struct ieee80211_node * 1941 #ifdef IEEE80211_DEBUG_REFCNT 1942 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1943 const struct ieee80211_frame_min *wh, const char *func, int line) 1944 #else 1945 ieee80211_find_rxnode(struct ieee80211com *ic, 1946 const struct ieee80211_frame_min *wh) 1947 #endif 1948 { 1949 struct ieee80211_node_table *nt; 1950 struct ieee80211_node *ni; 1951 1952 nt = &ic->ic_sta; 1953 IEEE80211_NODE_LOCK(nt); 1954 ni = _find_rxnode(nt, wh); 1955 IEEE80211_NODE_UNLOCK(nt); 1956 1957 return ni; 1958 } 1959 1960 /* 1961 * Like ieee80211_find_rxnode but use the supplied h/w 1962 * key index as a hint to locate the node in the key 1963 * mapping table. If an entry is present at the key 1964 * index we return it; otherwise do a normal lookup and 1965 * update the mapping table if the station has a unicast 1966 * key assigned to it. 1967 */ 1968 struct ieee80211_node * 1969 #ifdef IEEE80211_DEBUG_REFCNT 1970 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1971 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1972 const char *func, int line) 1973 #else 1974 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1975 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1976 #endif 1977 { 1978 struct ieee80211_node_table *nt; 1979 struct ieee80211_node *ni; 1980 1981 nt = &ic->ic_sta; 1982 IEEE80211_NODE_LOCK(nt); 1983 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1984 ni = nt->nt_keyixmap[keyix]; 1985 else 1986 ni = NULL; 1987 if (ni == NULL) { 1988 ni = _find_rxnode(nt, wh); 1989 if (ni != NULL && nt->nt_keyixmap != NULL) { 1990 /* 1991 * If the station has a unicast key cache slot 1992 * assigned update the key->node mapping table. 1993 */ 1994 keyix = ni->ni_ucastkey.wk_rxkeyix; 1995 /* XXX can keyixmap[keyix] != NULL? */ 1996 if (keyix < nt->nt_keyixmax && 1997 nt->nt_keyixmap[keyix] == NULL) { 1998 IEEE80211_DPRINTF(ni->ni_vap, 1999 IEEE80211_MSG_NODE, 2000 "%s: add key map entry %p<%s> refcnt %d\n", 2001 __func__, ni, ether_sprintf(ni->ni_macaddr), 2002 ieee80211_node_refcnt(ni)+1); 2003 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 2004 } 2005 } 2006 } else { 2007 if (IS_BCAST_PROBEREQ(wh)) 2008 ni = NULL; /* spam bcast probe req to all vap's */ 2009 else 2010 ieee80211_ref_node(ni); 2011 } 2012 IEEE80211_NODE_UNLOCK(nt); 2013 2014 return ni; 2015 } 2016 #undef IS_BCAST_PROBEREQ 2017 #undef IS_PROBEREQ 2018 2019 /* 2020 * Return a reference to the appropriate node for sending 2021 * a data frame. This handles node discovery in adhoc networks. 2022 */ 2023 struct ieee80211_node * 2024 #ifdef IEEE80211_DEBUG_REFCNT 2025 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 2026 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2027 const char *func, int line) 2028 #else 2029 ieee80211_find_txnode(struct ieee80211vap *vap, 2030 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 2031 #endif 2032 { 2033 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2034 struct ieee80211_node *ni; 2035 2036 /* 2037 * The destination address should be in the node table 2038 * unless this is a multicast/broadcast frame. We can 2039 * also optimize station mode operation, all frames go 2040 * to the bss node. 2041 */ 2042 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2043 IEEE80211_NODE_LOCK(nt); 2044 if (vap->iv_opmode == IEEE80211_M_STA || 2045 vap->iv_opmode == IEEE80211_M_WDS || 2046 IEEE80211_IS_MULTICAST(macaddr)) 2047 ni = ieee80211_ref_node(vap->iv_bss); 2048 else 2049 ni = ieee80211_find_node_locked(nt, macaddr); 2050 IEEE80211_NODE_UNLOCK(nt); 2051 2052 if (ni == NULL) { 2053 if (vap->iv_opmode == IEEE80211_M_IBSS || 2054 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2055 /* 2056 * In adhoc mode cons up a node for the destination. 2057 * Note that we need an additional reference for the 2058 * caller to be consistent with 2059 * ieee80211_find_node_locked. 2060 */ 2061 /* 2062 * XXX TODO: this doesn't fake up 11n state; we need 2063 * to find another way to get it upgraded. 2064 */ 2065 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2066 if (ni != NULL) 2067 (void) ieee80211_ref_node(ni); 2068 } else { 2069 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2070 "no node, discard frame (%s)", __func__); 2071 vap->iv_stats.is_tx_nonode++; 2072 } 2073 } 2074 return ni; 2075 } 2076 2077 static void 2078 _ieee80211_free_node(struct ieee80211_node *ni) 2079 { 2080 struct ieee80211_node_table *nt = ni->ni_table; 2081 2082 /* 2083 * NB: careful about referencing the vap as it may be 2084 * gone if the last reference was held by a driver. 2085 * We know the com will always be present so it's safe 2086 * to use ni_ic below to reclaim resources. 2087 */ 2088 #if 0 2089 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2090 "%s %p<%s> in %s table\n", __func__, ni, 2091 ether_sprintf(ni->ni_macaddr), 2092 nt != NULL ? nt->nt_name : "<gone>"); 2093 #endif 2094 if (ni->ni_associd != 0) { 2095 struct ieee80211vap *vap = ni->ni_vap; 2096 if (vap->iv_aid_bitmap != NULL) 2097 IEEE80211_AID_CLR(vap, ni->ni_associd); 2098 } 2099 if (nt != NULL) 2100 ieee80211_del_node_nt(nt, ni); 2101 ni->ni_ic->ic_node_free(ni); 2102 } 2103 2104 /* 2105 * Clear any entry in the unicast key mapping table. 2106 */ 2107 static int 2108 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2109 { 2110 ieee80211_keyix keyix; 2111 2112 keyix = ni->ni_ucastkey.wk_rxkeyix; 2113 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2114 nt->nt_keyixmap[keyix] == ni) { 2115 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2116 "%s: %p<%s> clear key map entry %u\n", 2117 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2118 nt->nt_keyixmap[keyix] = NULL; 2119 ieee80211_node_decref(ni); 2120 return 1; 2121 } 2122 2123 return 0; 2124 } 2125 2126 void 2127 #ifdef IEEE80211_DEBUG_REFCNT 2128 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 2129 #else 2130 ieee80211_free_node(struct ieee80211_node *ni) 2131 #endif 2132 { 2133 struct ieee80211_node_table *nt = ni->ni_table; 2134 2135 #ifdef IEEE80211_DEBUG_REFCNT 2136 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2137 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2138 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2139 #endif 2140 if (nt != NULL) { 2141 IEEE80211_NODE_LOCK(nt); 2142 if (ieee80211_node_dectestref(ni)) { 2143 /* 2144 * Last reference, reclaim state. 2145 */ 2146 _ieee80211_free_node(ni); 2147 } else if (ieee80211_node_refcnt(ni) == 1) 2148 if (node_clear_keyixmap(nt, ni)) 2149 _ieee80211_free_node(ni); 2150 IEEE80211_NODE_UNLOCK(nt); 2151 } else { 2152 if (ieee80211_node_dectestref(ni)) 2153 _ieee80211_free_node(ni); 2154 } 2155 } 2156 2157 /* 2158 * Reclaim a unicast key and clear any key cache state. 2159 */ 2160 int 2161 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2162 { 2163 struct ieee80211com *ic = ni->ni_ic; 2164 struct ieee80211_node_table *nt = &ic->ic_sta; 2165 struct ieee80211_node *nikey; 2166 ieee80211_keyix keyix; 2167 int isowned, status; 2168 2169 /* 2170 * NB: We must beware of LOR here; deleting the key 2171 * can cause the crypto layer to block traffic updates 2172 * which can generate a LOR against the node table lock; 2173 * grab it here and stash the key index for our use below. 2174 * 2175 * Must also beware of recursion on the node table lock. 2176 * When called from node_cleanup we may already have 2177 * the node table lock held. Unfortunately there's no 2178 * way to separate out this path so we must do this 2179 * conditionally. 2180 */ 2181 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2182 if (!isowned) 2183 IEEE80211_NODE_LOCK(nt); 2184 nikey = NULL; 2185 status = 1; /* NB: success */ 2186 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2187 keyix = ni->ni_ucastkey.wk_rxkeyix; 2188 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2189 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2190 nikey = nt->nt_keyixmap[keyix]; 2191 nt->nt_keyixmap[keyix] = NULL; 2192 } 2193 } 2194 if (!isowned) 2195 IEEE80211_NODE_UNLOCK(nt); 2196 2197 if (nikey != NULL) { 2198 KASSERT(nikey == ni, 2199 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2200 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2201 "%s: delete key map entry %p<%s> refcnt %d\n", 2202 __func__, ni, ether_sprintf(ni->ni_macaddr), 2203 ieee80211_node_refcnt(ni)-1); 2204 ieee80211_free_node(ni); 2205 } 2206 return status; 2207 } 2208 2209 /* 2210 * Reclaim a node. If this is the last reference count then 2211 * do the normal free work. Otherwise remove it from the node 2212 * table and mark it gone by clearing the back-reference. 2213 */ 2214 static void 2215 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2216 { 2217 2218 IEEE80211_NODE_LOCK_ASSERT(nt); 2219 2220 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2221 "%s: remove %p<%s> from %s table, refcnt %d\n", 2222 __func__, ni, ether_sprintf(ni->ni_macaddr), 2223 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2224 /* 2225 * Clear any entry in the unicast key mapping table. 2226 * We need to do it here so rx lookups don't find it 2227 * in the mapping table even if it's not in the hash 2228 * table. We cannot depend on the mapping table entry 2229 * being cleared because the node may not be free'd. 2230 */ 2231 (void)node_clear_keyixmap(nt, ni); 2232 if (!ieee80211_node_dectestref(ni)) { 2233 /* 2234 * Other references are present, just remove the 2235 * node from the table so it cannot be found. When 2236 * the references are dropped storage will be 2237 * reclaimed. 2238 */ 2239 ieee80211_del_node_nt(nt, ni); 2240 } else 2241 _ieee80211_free_node(ni); 2242 } 2243 2244 /* 2245 * Node table support. 2246 */ 2247 2248 static void 2249 ieee80211_node_table_init(struct ieee80211com *ic, 2250 struct ieee80211_node_table *nt, 2251 const char *name, int inact, int keyixmax) 2252 { 2253 2254 nt->nt_ic = ic; 2255 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2256 TAILQ_INIT(&nt->nt_node); 2257 nt->nt_count = 0; 2258 nt->nt_name = name; 2259 nt->nt_inact_init = inact; 2260 nt->nt_keyixmax = keyixmax; 2261 if (nt->nt_keyixmax > 0) { 2262 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2263 keyixmax * sizeof(struct ieee80211_node *), 2264 M_80211_NODE, 2265 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2266 if (nt->nt_keyixmap == NULL) 2267 ic_printf(ic, 2268 "Cannot allocate key index map with %u entries\n", 2269 keyixmax); 2270 } else 2271 nt->nt_keyixmap = NULL; 2272 } 2273 2274 static void 2275 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2276 struct ieee80211vap *match) 2277 { 2278 struct ieee80211_node *ni, *next; 2279 2280 IEEE80211_NODE_LOCK(nt); 2281 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2282 if (match != NULL && ni->ni_vap != match) 2283 continue; 2284 /* XXX can this happen? if so need's work */ 2285 if (ni->ni_associd != 0) { 2286 struct ieee80211vap *vap = ni->ni_vap; 2287 2288 if (vap->iv_auth->ia_node_leave != NULL) 2289 vap->iv_auth->ia_node_leave(ni); 2290 if (vap->iv_aid_bitmap != NULL) 2291 IEEE80211_AID_CLR(vap, ni->ni_associd); 2292 } 2293 ni->ni_wdsvap = NULL; /* clear reference */ 2294 node_reclaim(nt, ni); 2295 } 2296 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2297 /* 2298 * Make a separate pass to clear references to this vap 2299 * held by DWDS entries. They will not be matched above 2300 * because ni_vap will point to the ap vap but we still 2301 * need to clear ni_wdsvap when the WDS vap is destroyed 2302 * and/or reset. 2303 */ 2304 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2305 if (ni->ni_wdsvap == match) 2306 ni->ni_wdsvap = NULL; 2307 } 2308 IEEE80211_NODE_UNLOCK(nt); 2309 } 2310 2311 static void 2312 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2313 { 2314 ieee80211_node_table_reset(nt, NULL); 2315 if (nt->nt_keyixmap != NULL) { 2316 #ifdef DIAGNOSTIC 2317 /* XXX verify all entries are NULL */ 2318 int i; 2319 for (i = 0; i < nt->nt_keyixmax; i++) 2320 if (nt->nt_keyixmap[i] != NULL) 2321 printf("%s: %s[%u] still active\n", __func__, 2322 nt->nt_name, i); 2323 #endif 2324 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2325 nt->nt_keyixmap = NULL; 2326 } 2327 IEEE80211_NODE_LOCK_DESTROY(nt); 2328 } 2329 2330 static void 2331 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2332 { 2333 struct ieee80211com *ic = ni->ni_ic; 2334 struct ieee80211vap *vap = ni->ni_vap; 2335 2336 /* 2337 * Only process stations when in RUN state. This 2338 * insures, for example, that we don't timeout an 2339 * inactive station during CAC. Note that CSA state 2340 * is actually handled in ieee80211_node_timeout as 2341 * it applies to more than timeout processing. 2342 */ 2343 if (vap->iv_state != IEEE80211_S_RUN) 2344 return; 2345 /* 2346 * Ignore entries for which have yet to receive an 2347 * authentication frame. These are transient and 2348 * will be reclaimed when the last reference to them 2349 * goes away (when frame xmits complete). 2350 */ 2351 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2352 vap->iv_opmode == IEEE80211_M_STA) && 2353 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2354 return; 2355 /* 2356 * Free fragment if not needed anymore 2357 * (last fragment older than 1s). 2358 * XXX doesn't belong here, move to node_age 2359 */ 2360 if (ni->ni_rxfrag[0] != NULL && 2361 ticks > ni->ni_rxfragstamp + hz) { 2362 m_freem(ni->ni_rxfrag[0]); 2363 ni->ni_rxfrag[0] = NULL; 2364 } 2365 if (ni->ni_inact > 0) { 2366 ni->ni_inact--; 2367 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2368 "%s: inact %u inact_reload %u nrates %u", 2369 __func__, ni->ni_inact, ni->ni_inact_reload, 2370 ni->ni_rates.rs_nrates); 2371 } 2372 /* 2373 * Special case ourself; we may be idle for extended periods 2374 * of time and regardless reclaiming our state is wrong. 2375 * XXX run ic_node_age 2376 */ 2377 /* XXX before inact decrement? */ 2378 if (ni == vap->iv_bss) 2379 return; 2380 if (ni->ni_associd != 0 || 2381 (vap->iv_opmode == IEEE80211_M_IBSS || 2382 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2383 /* 2384 * Age/drain resources held by the station. 2385 */ 2386 ic->ic_node_age(ni); 2387 /* 2388 * Probe the station before time it out. We 2389 * send a null data frame which may not be 2390 * universally supported by drivers (need it 2391 * for ps-poll support so it should be...). 2392 * 2393 * XXX don't probe the station unless we've 2394 * received a frame from them (and have 2395 * some idea of the rates they are capable 2396 * of); this will get fixed more properly 2397 * soon with better handling of the rate set. 2398 */ 2399 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2400 (0 < ni->ni_inact && 2401 ni->ni_inact <= vap->iv_inact_probe) && 2402 ni->ni_rates.rs_nrates != 0) { 2403 IEEE80211_NOTE(vap, 2404 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2405 ni, "%s", 2406 "probe station due to inactivity"); 2407 /* 2408 * Grab a reference so the node cannot 2409 * be reclaimed before we send the frame. 2410 * ieee80211_send_nulldata understands 2411 * we've done this and reclaims the 2412 * ref for us as needed. 2413 */ 2414 /* XXX fix this (not required anymore). */ 2415 ieee80211_ref_node(ni); 2416 /* XXX useless */ 2417 ieee80211_send_nulldata(ni); 2418 /* XXX stat? */ 2419 return; 2420 } 2421 } 2422 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2423 ni->ni_inact <= 0) { 2424 IEEE80211_NOTE(vap, 2425 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2426 "station timed out due to inactivity " 2427 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2428 /* 2429 * Send a deauthenticate frame and drop the station. 2430 * This is somewhat complicated due to reference counts 2431 * and locking. At this point a station will typically 2432 * have a reference count of 2. ieee80211_node_leave 2433 * will do a "free" of the node which will drop the 2434 * reference count. But in the meantime a reference 2435 * wil be held by the deauth frame. The actual reclaim 2436 * of the node will happen either after the tx is 2437 * completed or by ieee80211_node_leave. 2438 */ 2439 if (ni->ni_associd != 0) { 2440 IEEE80211_SEND_MGMT(ni, 2441 IEEE80211_FC0_SUBTYPE_DEAUTH, 2442 IEEE80211_REASON_AUTH_EXPIRE); 2443 } 2444 ieee80211_node_leave(ni); 2445 vap->iv_stats.is_node_timeout++; 2446 } 2447 } 2448 2449 /* 2450 * Timeout inactive stations and do related housekeeping. 2451 */ 2452 static void 2453 ieee80211_timeout_stations(struct ieee80211com *ic) 2454 { 2455 struct ieee80211_node_table *nt = &ic->ic_sta; 2456 2457 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2458 } 2459 2460 /* 2461 * Aggressively reclaim resources. This should be used 2462 * only in a critical situation to reclaim mbuf resources. 2463 */ 2464 void 2465 ieee80211_drain(struct ieee80211com *ic) 2466 { 2467 struct ieee80211_node_table *nt = &ic->ic_sta; 2468 struct ieee80211vap *vap; 2469 struct ieee80211_node *ni; 2470 2471 IEEE80211_NODE_LOCK(nt); 2472 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2473 /* 2474 * Ignore entries for which have yet to receive an 2475 * authentication frame. These are transient and 2476 * will be reclaimed when the last reference to them 2477 * goes away (when frame xmits complete). 2478 */ 2479 vap = ni->ni_vap; 2480 /* 2481 * Only process stations when in RUN state. This 2482 * insures, for example, that we don't timeout an 2483 * inactive station during CAC. Note that CSA state 2484 * is actually handled in ieee80211_node_timeout as 2485 * it applies to more than timeout processing. 2486 */ 2487 if (vap->iv_state != IEEE80211_S_RUN) 2488 continue; 2489 /* XXX can vap be NULL? */ 2490 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2491 vap->iv_opmode == IEEE80211_M_STA) && 2492 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2493 continue; 2494 /* 2495 * Free fragments. 2496 * XXX doesn't belong here, move to node_drain 2497 */ 2498 if (ni->ni_rxfrag[0] != NULL) { 2499 m_freem(ni->ni_rxfrag[0]); 2500 ni->ni_rxfrag[0] = NULL; 2501 } 2502 /* 2503 * Drain resources held by the station. 2504 */ 2505 ic->ic_node_drain(ni); 2506 } 2507 IEEE80211_NODE_UNLOCK(nt); 2508 } 2509 2510 /* 2511 * Per-ieee80211com inactivity timer callback. 2512 */ 2513 void 2514 ieee80211_node_timeout(void *arg) 2515 { 2516 struct ieee80211com *ic = arg; 2517 2518 /* 2519 * Defer timeout processing if a channel switch is pending. 2520 * We typically need to be mute so not doing things that 2521 * might generate frames is good to handle in one place. 2522 * Suppressing the station timeout processing may extend the 2523 * lifetime of inactive stations (by not decrementing their 2524 * idle counters) but this should be ok unless the CSA is 2525 * active for an unusually long time. 2526 */ 2527 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2528 ieee80211_scan_timeout(ic); 2529 ieee80211_timeout_stations(ic); 2530 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2531 2532 IEEE80211_LOCK(ic); 2533 ieee80211_erp_timeout(ic); 2534 ieee80211_ht_timeout(ic); 2535 ieee80211_vht_timeout(ic); 2536 IEEE80211_UNLOCK(ic); 2537 } 2538 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2539 ieee80211_node_timeout, ic); 2540 } 2541 2542 /* 2543 * The same as ieee80211_iterate_nodes(), but for one vap only. 2544 */ 2545 int 2546 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2547 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2548 { 2549 struct ieee80211_node **ni_arr; 2550 struct ieee80211_node *ni; 2551 size_t size; 2552 int count, i; 2553 2554 /* 2555 * Iterate over the node table and save an array of ref'ed nodes. 2556 * 2557 * This is separated out from calling the actual node function so that 2558 * no LORs will occur. 2559 */ 2560 IEEE80211_NODE_LOCK(nt); 2561 count = nt->nt_count; 2562 size = count * sizeof(struct ieee80211_node *); 2563 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2564 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2565 if (ni_arr == NULL) { 2566 IEEE80211_NODE_UNLOCK(nt); 2567 return (ENOMEM); 2568 } 2569 2570 i = 0; 2571 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2572 if (vap != NULL && ni->ni_vap != vap) 2573 continue; 2574 KASSERT(i < count, 2575 ("node array overflow (vap %p, i %d, count %d)\n", 2576 vap, i, count)); 2577 ni_arr[i] = ieee80211_ref_node(ni); 2578 i++; 2579 } 2580 IEEE80211_NODE_UNLOCK(nt); 2581 2582 for (i = 0; i < count; i++) { 2583 if (ni_arr[i] == NULL) /* end of the list */ 2584 break; 2585 (*f)(arg, ni_arr[i]); 2586 /* ieee80211_free_node() locks by itself */ 2587 ieee80211_free_node(ni_arr[i]); 2588 } 2589 2590 IEEE80211_FREE(ni_arr, M_80211_NODE); 2591 2592 return (0); 2593 } 2594 2595 /* 2596 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2597 * reference in the source. 2598 */ 2599 void 2600 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2601 ieee80211_iter_func *f, void *arg) 2602 { 2603 /* XXX no way to pass error to the caller. */ 2604 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2605 } 2606 2607 void 2608 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2609 { 2610 printf("0x%p: mac %s refcnt %d\n", ni, 2611 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2612 printf("\tauthmode %u flags 0x%x\n", 2613 ni->ni_authmode, ni->ni_flags); 2614 printf("\tassocid 0x%x txpower %u vlan %u\n", 2615 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2616 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2617 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2618 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2619 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2620 ni->ni_rxfragstamp); 2621 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2622 node_getrssi(ni), ni->ni_noise, 2623 ni->ni_intval, ni->ni_capinfo); 2624 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2625 ether_sprintf(ni->ni_bssid), 2626 ni->ni_esslen, ni->ni_essid, 2627 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2628 printf("\tinact %u inact_reload %u txrate %u\n", 2629 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2630 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2631 ni->ni_htcap, ni->ni_htparam, 2632 ni->ni_htctlchan, ni->ni_ht2ndchan); 2633 printf("\thtopmode %x htstbc %x htchw %u\n", 2634 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2635 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2636 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2637 (int) ni->ni_vht_basicmcs); 2638 /* XXX VHT state */ 2639 } 2640 2641 void 2642 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2643 { 2644 ieee80211_iterate_nodes(nt, 2645 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2646 } 2647 2648 static void 2649 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2650 { 2651 struct ieee80211vap *vap; 2652 2653 IEEE80211_LOCK_ASSERT(ic); 2654 2655 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2656 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2657 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2658 } 2659 2660 void 2661 ieee80211_notify_erp(struct ieee80211com *ic) 2662 { 2663 IEEE80211_LOCK(ic); 2664 ieee80211_notify_erp_locked(ic); 2665 IEEE80211_UNLOCK(ic); 2666 } 2667 2668 /* 2669 * Handle a station joining an 11g network. 2670 */ 2671 static void 2672 ieee80211_node_join_11g(struct ieee80211_node *ni) 2673 { 2674 struct ieee80211com *ic = ni->ni_ic; 2675 struct ieee80211vap *vap = ni->ni_vap; 2676 2677 IEEE80211_LOCK_ASSERT(ic); 2678 2679 /* 2680 * Station isn't capable of short slot time. Bump 2681 * the count of long slot time stations and disable 2682 * use of short slot time. Note that the actual switch 2683 * over to long slot time use may not occur until the 2684 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2685 */ 2686 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2687 ic->ic_longslotsta++; 2688 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2689 "station needs long slot time, count %d", 2690 ic->ic_longslotsta); 2691 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2692 /* 2693 * Don't force slot time when switched to turbo 2694 * mode as non-ERP stations won't be present; this 2695 * need only be done when on the normal G channel. 2696 */ 2697 ieee80211_vap_set_shortslottime(vap, 0); 2698 } 2699 } 2700 /* 2701 * If the new station is not an ERP station 2702 * then bump the counter and enable protection 2703 * if configured. 2704 */ 2705 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2706 ic->ic_nonerpsta++; 2707 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2708 "station is !ERP, %d non-ERP stations associated", 2709 ic->ic_nonerpsta); 2710 /* 2711 * If station does not support short preamble 2712 * then we must enable use of Barker preamble. 2713 */ 2714 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2715 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2716 "%s", "station needs long preamble"); 2717 ic->ic_flags |= IEEE80211_F_USEBARKER; 2718 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2719 } 2720 /* 2721 * If protection is configured and this is the first 2722 * indication we should use protection, enable it. 2723 */ 2724 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2725 ic->ic_nonerpsta == 1 && 2726 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2727 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2728 "%s: enable use of protection\n", __func__); 2729 ic->ic_flags |= IEEE80211_F_USEPROT; 2730 ieee80211_notify_erp_locked(ic); 2731 } 2732 } else 2733 ni->ni_flags |= IEEE80211_NODE_ERP; 2734 } 2735 2736 void 2737 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2738 { 2739 struct ieee80211com *ic = ni->ni_ic; 2740 struct ieee80211vap *vap = ni->ni_vap; 2741 int newassoc; 2742 2743 if (ni->ni_associd == 0) { 2744 uint16_t aid; 2745 2746 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2747 /* 2748 * It would be good to search the bitmap 2749 * more efficiently, but this will do for now. 2750 */ 2751 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2752 if (!IEEE80211_AID_ISSET(vap, aid)) 2753 break; 2754 } 2755 if (aid >= vap->iv_max_aid) { 2756 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2757 ieee80211_node_leave(ni); 2758 return; 2759 } 2760 ni->ni_associd = aid | 0xc000; 2761 ni->ni_jointime = time_uptime; 2762 IEEE80211_LOCK(ic); 2763 IEEE80211_AID_SET(vap, ni->ni_associd); 2764 vap->iv_sta_assoc++; 2765 ic->ic_sta_assoc++; 2766 2767 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2768 ieee80211_ht_node_join(ni); 2769 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2770 ieee80211_vht_node_join(ni); 2771 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2772 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2773 ieee80211_node_join_11g(ni); 2774 IEEE80211_UNLOCK(ic); 2775 2776 newassoc = 1; 2777 } else 2778 newassoc = 0; 2779 2780 /* 2781 * XXX VHT - should log VHT channel width, etc 2782 */ 2783 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2784 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 2785 IEEE80211_NODE_AID(ni), 2786 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2787 vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2788 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2789 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2790 /* XXX update for VHT string */ 2791 ni->ni_flags & IEEE80211_NODE_HT ? 2792 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2793 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2794 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 2795 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2796 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2797 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2798 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2799 ", fast-frames" : "", 2800 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2801 ", turbo" : "" 2802 ); 2803 2804 ieee80211_node_setuptxparms(ni); 2805 ieee80211_ratectl_node_init(ni); 2806 /* give driver a chance to setup state like ni_txrate */ 2807 if (ic->ic_newassoc != NULL) 2808 ic->ic_newassoc(ni, newassoc); 2809 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2810 /* tell the authenticator about new station */ 2811 if (vap->iv_auth->ia_node_join != NULL) 2812 vap->iv_auth->ia_node_join(ni); 2813 ieee80211_notify_node_join(ni, 2814 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2815 } 2816 2817 static void 2818 disable_protection(struct ieee80211com *ic) 2819 { 2820 KASSERT(ic->ic_nonerpsta == 0 && 2821 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2822 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2823 ic->ic_flags_ext)); 2824 2825 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2826 /* XXX verify mode? */ 2827 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2828 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2829 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2830 } 2831 ieee80211_notify_erp_locked(ic); 2832 } 2833 2834 /* 2835 * Handle a station leaving an 11g network. 2836 */ 2837 static void 2838 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2839 { 2840 struct ieee80211com *ic = ni->ni_ic; 2841 struct ieee80211vap *vap = ni->ni_vap; 2842 2843 IEEE80211_LOCK_ASSERT(ic); 2844 2845 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2846 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2847 ic->ic_bsschan->ic_flags)); 2848 2849 /* 2850 * If a long slot station do the slot time bookkeeping. 2851 */ 2852 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2853 KASSERT(ic->ic_longslotsta > 0, 2854 ("bogus long slot station count %d", ic->ic_longslotsta)); 2855 ic->ic_longslotsta--; 2856 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2857 "long slot time station leaves, count now %d", 2858 ic->ic_longslotsta); 2859 if (ic->ic_longslotsta == 0) { 2860 /* 2861 * Re-enable use of short slot time if supported 2862 * and not operating in IBSS mode (per spec). 2863 */ 2864 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2865 ic->ic_opmode != IEEE80211_M_IBSS) { 2866 IEEE80211_DPRINTF(ni->ni_vap, 2867 IEEE80211_MSG_ASSOC, 2868 "%s: re-enable use of short slot time\n", 2869 __func__); 2870 ieee80211_vap_set_shortslottime(vap, 1); 2871 } 2872 } 2873 } 2874 /* 2875 * If a non-ERP station do the protection-related bookkeeping. 2876 */ 2877 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2878 KASSERT(ic->ic_nonerpsta > 0, 2879 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2880 ic->ic_nonerpsta--; 2881 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2882 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2883 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2884 " (non-ERP sta present)" : ""); 2885 if (ic->ic_nonerpsta == 0 && 2886 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2887 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2888 "%s: disable use of protection\n", __func__); 2889 disable_protection(ic); 2890 } 2891 } 2892 } 2893 2894 /* 2895 * Time out presence of an overlapping bss with non-ERP 2896 * stations. When operating in hostap mode we listen for 2897 * beacons from other stations and if we identify a non-ERP 2898 * station is present we enable protection. To identify 2899 * when all non-ERP stations are gone we time out this 2900 * condition. 2901 */ 2902 static void 2903 ieee80211_erp_timeout(struct ieee80211com *ic) 2904 { 2905 2906 IEEE80211_LOCK_ASSERT(ic); 2907 2908 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2909 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2910 #if 0 2911 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2912 "%s", "age out non-ERP sta present on channel"); 2913 #endif 2914 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2915 if (ic->ic_nonerpsta == 0) 2916 disable_protection(ic); 2917 } 2918 } 2919 2920 /* 2921 * Handle bookkeeping for station deauthentication/disassociation 2922 * when operating as an ap. 2923 */ 2924 void 2925 ieee80211_node_leave(struct ieee80211_node *ni) 2926 { 2927 struct ieee80211com *ic = ni->ni_ic; 2928 struct ieee80211vap *vap = ni->ni_vap; 2929 struct ieee80211_node_table *nt = ni->ni_table; 2930 2931 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2932 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2933 2934 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2935 ("unexpected operating mode %u", vap->iv_opmode)); 2936 /* 2937 * If node wasn't previously associated all 2938 * we need to do is reclaim the reference. 2939 */ 2940 /* XXX ibss mode bypasses 11g and notification */ 2941 if (ni->ni_associd == 0) 2942 goto done; 2943 /* 2944 * Tell the authenticator the station is leaving. 2945 * Note that we must do this before yanking the 2946 * association id as the authenticator uses the 2947 * associd to locate it's state block. 2948 */ 2949 if (vap->iv_auth->ia_node_leave != NULL) 2950 vap->iv_auth->ia_node_leave(ni); 2951 2952 IEEE80211_LOCK(ic); 2953 IEEE80211_AID_CLR(vap, ni->ni_associd); 2954 vap->iv_sta_assoc--; 2955 ic->ic_sta_assoc--; 2956 2957 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2958 ieee80211_vht_node_leave(ni); 2959 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2960 ieee80211_ht_node_leave(ni); 2961 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2962 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2963 ieee80211_node_leave_11g(ni); 2964 IEEE80211_UNLOCK(ic); 2965 /* 2966 * Cleanup station state. In particular clear various 2967 * state that might otherwise be reused if the node 2968 * is reused before the reference count goes to zero 2969 * (and memory is reclaimed). 2970 */ 2971 ieee80211_sta_leave(ni); 2972 done: 2973 /* 2974 * Remove the node from any table it's recorded in and 2975 * drop the caller's reference. Removal from the table 2976 * is important to insure the node is not reprocessed 2977 * for inactivity. 2978 */ 2979 if (nt != NULL) { 2980 IEEE80211_NODE_LOCK(nt); 2981 node_reclaim(nt, ni); 2982 IEEE80211_NODE_UNLOCK(nt); 2983 } else 2984 ieee80211_free_node(ni); 2985 } 2986 2987 struct rssiinfo { 2988 int rssi_samples; 2989 uint32_t rssi_total; 2990 }; 2991 2992 static void 2993 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2994 { 2995 struct rssiinfo *info = arg; 2996 struct ieee80211vap *vap = ni->ni_vap; 2997 int8_t rssi; 2998 2999 /* only associated stations */ 3000 if (ni->ni_associd == 0) 3001 return; 3002 rssi = vap->iv_ic->ic_node_getrssi(ni); 3003 if (rssi != 0) { 3004 info->rssi_samples++; 3005 info->rssi_total += rssi; 3006 } 3007 } 3008 3009 static void 3010 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 3011 { 3012 struct rssiinfo *info = arg; 3013 struct ieee80211vap *vap = ni->ni_vap; 3014 int8_t rssi; 3015 3016 /* only neighbors */ 3017 /* XXX check bssid */ 3018 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 3019 return; 3020 rssi = vap->iv_ic->ic_node_getrssi(ni); 3021 if (rssi != 0) { 3022 info->rssi_samples++; 3023 info->rssi_total += rssi; 3024 } 3025 } 3026 3027 #ifdef IEEE80211_SUPPORT_MESH 3028 static void 3029 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3030 { 3031 struct rssiinfo *info = arg; 3032 struct ieee80211vap *vap = ni->ni_vap; 3033 int8_t rssi; 3034 3035 /* only neighbors that peered successfully */ 3036 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3037 return; 3038 rssi = vap->iv_ic->ic_node_getrssi(ni); 3039 if (rssi != 0) { 3040 info->rssi_samples++; 3041 info->rssi_total += rssi; 3042 } 3043 } 3044 #endif /* IEEE80211_SUPPORT_MESH */ 3045 3046 int8_t 3047 ieee80211_getrssi(struct ieee80211vap *vap) 3048 { 3049 #define NZ(x) ((x) == 0 ? 1 : (x)) 3050 struct ieee80211com *ic = vap->iv_ic; 3051 struct rssiinfo info; 3052 3053 info.rssi_total = 0; 3054 info.rssi_samples = 0; 3055 switch (vap->iv_opmode) { 3056 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3057 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3058 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3059 &info); 3060 break; 3061 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3062 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3063 &info); 3064 break; 3065 #ifdef IEEE80211_SUPPORT_MESH 3066 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3067 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3068 &info); 3069 break; 3070 #endif 3071 case IEEE80211_M_MONITOR: /* XXX */ 3072 case IEEE80211_M_STA: /* use stats from associated ap */ 3073 default: 3074 if (vap->iv_bss != NULL) 3075 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3076 info.rssi_samples = 1; 3077 break; 3078 } 3079 return info.rssi_total / NZ(info.rssi_samples); 3080 #undef NZ 3081 } 3082 3083 void 3084 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3085 { 3086 3087 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3088 return; 3089 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3090 /* for non-station mode return avg'd rssi accounting */ 3091 if (vap->iv_opmode != IEEE80211_M_STA) 3092 *rssi = ieee80211_getrssi(vap); 3093 } 3094