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 void node_cleanup(struct ieee80211_node *); 84 static void node_free(struct ieee80211_node *); 85 static void node_age(struct ieee80211_node *); 86 static int8_t node_getrssi(const struct ieee80211_node *); 87 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 88 static void node_getmimoinfo(const struct ieee80211_node *, 89 struct ieee80211_mimo_info *); 90 91 static void _ieee80211_free_node(struct ieee80211_node *); 92 93 static void node_reclaim(struct ieee80211_node_table *nt, 94 struct ieee80211_node *ni); 95 static void ieee80211_node_table_init(struct ieee80211com *ic, 96 struct ieee80211_node_table *nt, const char *name, 97 int inact, int keymaxix); 98 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 99 struct ieee80211vap *); 100 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 101 static void ieee80211_erp_timeout(struct ieee80211com *); 102 103 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 104 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 105 106 void 107 ieee80211_node_attach(struct ieee80211com *ic) 108 { 109 /* XXX really want maxlen enforced per-sta */ 110 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 111 "802.11 staging q"); 112 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 113 IEEE80211_INACT_INIT, ic->ic_max_keyix); 114 callout_init(&ic->ic_inact, 1); 115 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 116 ieee80211_node_timeout, ic); 117 118 ic->ic_node_alloc = node_alloc; 119 ic->ic_node_free = node_free; 120 ic->ic_node_cleanup = node_cleanup; 121 ic->ic_node_age = node_age; 122 ic->ic_node_drain = node_age; /* NB: same as age */ 123 ic->ic_node_getrssi = node_getrssi; 124 ic->ic_node_getsignal = node_getsignal; 125 ic->ic_node_getmimoinfo = node_getmimoinfo; 126 127 /* 128 * Set flags to be propagated to all vap's; 129 * these define default behaviour/configuration. 130 */ 131 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 132 } 133 134 void 135 ieee80211_node_detach(struct ieee80211com *ic) 136 { 137 138 callout_drain(&ic->ic_inact); 139 ieee80211_node_table_cleanup(&ic->ic_sta); 140 ieee80211_ageq_drain(&ic->ic_stageq); 141 ieee80211_ageq_cleanup(&ic->ic_stageq); 142 } 143 144 void 145 ieee80211_node_vattach(struct ieee80211vap *vap) 146 { 147 /* NB: driver can override */ 148 vap->iv_max_aid = IEEE80211_AID_DEF; 149 150 /* default station inactivity timer setings */ 151 vap->iv_inact_init = IEEE80211_INACT_INIT; 152 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 153 vap->iv_inact_run = IEEE80211_INACT_RUN; 154 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 155 156 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 157 "%s: init %u auth %u run %u probe %u\n", __func__, 158 vap->iv_inact_init, vap->iv_inact_auth, 159 vap->iv_inact_run, vap->iv_inact_probe); 160 } 161 162 void 163 ieee80211_node_latevattach(struct ieee80211vap *vap) 164 { 165 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 166 /* XXX should we allow max aid to be zero? */ 167 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 168 vap->iv_max_aid = IEEE80211_AID_MIN; 169 if_printf(vap->iv_ifp, 170 "WARNING: max aid too small, changed to %d\n", 171 vap->iv_max_aid); 172 } 173 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 174 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 175 M_80211_NODE, 176 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 177 if (vap->iv_aid_bitmap == NULL) { 178 /* XXX no way to recover */ 179 printf("%s: no memory for AID bitmap, max aid %d!\n", 180 __func__, vap->iv_max_aid); 181 vap->iv_max_aid = 0; 182 } 183 } 184 185 ieee80211_reset_bss(vap); 186 187 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 188 } 189 190 void 191 ieee80211_node_vdetach(struct ieee80211vap *vap) 192 { 193 struct ieee80211com *ic = vap->iv_ic; 194 195 ieee80211_node_table_reset(&ic->ic_sta, vap); 196 if (vap->iv_bss != NULL) { 197 ieee80211_free_node(vap->iv_bss); 198 vap->iv_bss = NULL; 199 } 200 if (vap->iv_aid_bitmap != NULL) { 201 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 202 vap->iv_aid_bitmap = NULL; 203 } 204 } 205 206 /* 207 * Port authorize/unauthorize interfaces for use by an authenticator. 208 */ 209 210 void 211 ieee80211_node_authorize(struct ieee80211_node *ni) 212 { 213 struct ieee80211vap *vap = ni->ni_vap; 214 215 ni->ni_flags |= IEEE80211_NODE_AUTH; 216 ni->ni_inact_reload = vap->iv_inact_run; 217 ni->ni_inact = ni->ni_inact_reload; 218 219 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 220 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 221 } 222 223 void 224 ieee80211_node_unauthorize(struct ieee80211_node *ni) 225 { 226 struct ieee80211vap *vap = ni->ni_vap; 227 228 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 229 ni->ni_inact_reload = vap->iv_inact_auth; 230 if (ni->ni_inact > ni->ni_inact_reload) 231 ni->ni_inact = ni->ni_inact_reload; 232 233 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 234 "%s: inact_reload %u inact %u", __func__, 235 ni->ni_inact_reload, ni->ni_inact); 236 } 237 238 /* 239 * Fix tx parameters for a node according to ``association state''. 240 */ 241 void 242 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 243 { 244 struct ieee80211vap *vap = ni->ni_vap; 245 enum ieee80211_phymode mode; 246 247 if (ni->ni_flags & IEEE80211_NODE_VHT) { 248 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 249 mode = IEEE80211_MODE_VHT_5GHZ; 250 else 251 mode = IEEE80211_MODE_VHT_2GHZ; 252 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 253 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 254 mode = IEEE80211_MODE_11NA; 255 else 256 mode = IEEE80211_MODE_11NG; 257 } else { /* legacy rate handling */ 258 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 259 mode = IEEE80211_MODE_STURBO_A; 260 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 261 mode = IEEE80211_MODE_HALF; 262 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 263 mode = IEEE80211_MODE_QUARTER; 264 /* NB: 108A should be handled as 11a */ 265 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 266 mode = IEEE80211_MODE_11A; 267 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 268 (ni->ni_flags & IEEE80211_NODE_ERP)) 269 mode = IEEE80211_MODE_11G; 270 else 271 mode = IEEE80211_MODE_11B; 272 } 273 ni->ni_txparms = &vap->iv_txparms[mode]; 274 } 275 276 /* 277 * Set/change the channel. The rate set is also updated as 278 * to insure a consistent view by drivers. 279 * XXX should be private but hostap needs it to deal with CSA 280 */ 281 void 282 ieee80211_node_set_chan(struct ieee80211_node *ni, 283 struct ieee80211_channel *chan) 284 { 285 struct ieee80211com *ic = ni->ni_ic; 286 struct ieee80211vap *vap = ni->ni_vap; 287 enum ieee80211_phymode mode; 288 289 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 290 291 ni->ni_chan = chan; 292 mode = ieee80211_chan2mode(chan); 293 if (IEEE80211_IS_CHAN_HT(chan)) { 294 /* 295 * We must install the legacy rate est in ni_rates and the 296 * HT rate set in ni_htrates. 297 */ 298 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 299 /* 300 * Setup bss tx parameters based on operating mode. We 301 * use legacy rates when operating in a mixed HT+non-HT bss 302 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 303 */ 304 if (mode == IEEE80211_MODE_11NA && 305 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 306 mode = IEEE80211_MODE_11A; 307 else if (mode == IEEE80211_MODE_11NG && 308 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 309 mode = IEEE80211_MODE_11G; 310 if (mode == IEEE80211_MODE_11G && 311 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 312 mode = IEEE80211_MODE_11B; 313 } 314 ni->ni_txparms = &vap->iv_txparms[mode]; 315 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 316 } 317 318 static __inline void 319 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 320 { 321 /* propagate useful state */ 322 nbss->ni_authmode = obss->ni_authmode; 323 nbss->ni_txpower = obss->ni_txpower; 324 nbss->ni_vlan = obss->ni_vlan; 325 /* XXX statistics? */ 326 /* XXX legacy WDS bssid? */ 327 } 328 329 void 330 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 331 { 332 struct ieee80211com *ic = vap->iv_ic; 333 struct ieee80211_node *ni; 334 335 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 336 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 337 ieee80211_opmode_name[vap->iv_opmode], 338 ieee80211_chan2ieee(ic, chan), 339 ieee80211_channel_type_char(chan), 340 chan->ic_flags); 341 342 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 343 if (ni == NULL) { 344 /* XXX recovery? */ 345 return; 346 } 347 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 348 ni->ni_esslen = vap->iv_des_ssid[0].len; 349 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 350 if (vap->iv_bss != NULL) 351 copy_bss(ni, vap->iv_bss); 352 ni->ni_intval = ic->ic_bintval; 353 if (vap->iv_flags & IEEE80211_F_PRIVACY) 354 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 355 if (ic->ic_phytype == IEEE80211_T_FH) { 356 ni->ni_fhdwell = 200; /* XXX */ 357 ni->ni_fhindex = 1; 358 } 359 if (vap->iv_opmode == IEEE80211_M_IBSS) { 360 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 361 if (vap->iv_flags & IEEE80211_F_DESBSSID) 362 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 363 else { 364 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 365 /* clear group bit, add local bit */ 366 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 367 } 368 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 369 if (vap->iv_flags & IEEE80211_F_DESBSSID) 370 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 371 else 372 #ifdef IEEE80211_SUPPORT_TDMA 373 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 374 #endif 375 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 376 #ifdef IEEE80211_SUPPORT_MESH 377 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 378 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 379 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 380 #endif 381 } 382 /* 383 * Fix the channel and related attributes. 384 */ 385 /* clear DFS CAC state on previous channel */ 386 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 387 ic->ic_bsschan->ic_freq != chan->ic_freq && 388 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 389 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 390 ic->ic_bsschan = chan; 391 ieee80211_node_set_chan(ni, chan); 392 ic->ic_curmode = ieee80211_chan2mode(chan); 393 /* 394 * Do mode-specific setup. 395 */ 396 if (IEEE80211_IS_CHAN_FULL(chan)) { 397 if (IEEE80211_IS_CHAN_ANYG(chan)) { 398 /* 399 * Use a mixed 11b/11g basic rate set. 400 */ 401 ieee80211_setbasicrates(&ni->ni_rates, 402 IEEE80211_MODE_11G); 403 if (vap->iv_flags & IEEE80211_F_PUREG) { 404 /* 405 * Also mark OFDM rates basic so 11b 406 * stations do not join (WiFi compliance). 407 */ 408 ieee80211_addbasicrates(&ni->ni_rates, 409 IEEE80211_MODE_11A); 410 } 411 } else if (IEEE80211_IS_CHAN_B(chan)) { 412 /* 413 * Force pure 11b rate set. 414 */ 415 ieee80211_setbasicrates(&ni->ni_rates, 416 IEEE80211_MODE_11B); 417 } 418 } 419 420 /* XXX TODO: other bits and pieces - eg fast-frames? */ 421 422 /* If we're an 11n channel then initialise the 11n bits */ 423 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 424 /* XXX what else? */ 425 ieee80211_ht_node_init(ni); 426 ieee80211_vht_node_init(ni); 427 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 428 /* XXX what else? */ 429 ieee80211_ht_node_init(ni); 430 } 431 432 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 433 } 434 435 /* 436 * Reset bss state on transition to the INIT state. 437 * Clear any stations from the table (they have been 438 * deauth'd) and reset the bss node (clears key, rate 439 * etc. state). 440 */ 441 void 442 ieee80211_reset_bss(struct ieee80211vap *vap) 443 { 444 struct ieee80211com *ic = vap->iv_ic; 445 struct ieee80211_node *ni, *obss; 446 447 ieee80211_node_table_reset(&ic->ic_sta, vap); 448 /* XXX multi-bss: wrong */ 449 ieee80211_reset_erp(ic); 450 451 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 452 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 453 obss = vap->iv_bss; 454 vap->iv_bss = ieee80211_ref_node(ni); 455 if (obss != NULL) { 456 copy_bss(ni, obss); 457 ni->ni_intval = ic->ic_bintval; 458 ieee80211_free_node(obss); 459 } else 460 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 461 } 462 463 static int 464 match_ssid(const struct ieee80211_node *ni, 465 int nssid, const struct ieee80211_scan_ssid ssids[]) 466 { 467 int i; 468 469 for (i = 0; i < nssid; i++) { 470 if (ni->ni_esslen == ssids[i].len && 471 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 472 return 1; 473 } 474 return 0; 475 } 476 477 /* 478 * Test a node for suitability/compatibility. 479 */ 480 static int 481 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 482 { 483 struct ieee80211com *ic = ni->ni_ic; 484 uint8_t rate; 485 486 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 487 return 0; 488 if (vap->iv_opmode == IEEE80211_M_IBSS) { 489 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 490 return 0; 491 } else { 492 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 493 return 0; 494 } 495 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 496 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 497 return 0; 498 } else { 499 /* XXX does this mean privacy is supported or required? */ 500 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 501 return 0; 502 } 503 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 504 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 505 if (rate & IEEE80211_RATE_BASIC) 506 return 0; 507 if (vap->iv_des_nssid != 0 && 508 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 509 return 0; 510 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 511 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 512 return 0; 513 return 1; 514 } 515 516 #ifdef IEEE80211_DEBUG 517 /* 518 * Display node suitability/compatibility. 519 */ 520 static void 521 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 522 { 523 struct ieee80211com *ic = ni->ni_ic; 524 uint8_t rate; 525 int fail; 526 527 fail = 0; 528 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 529 fail |= 0x01; 530 if (vap->iv_opmode == IEEE80211_M_IBSS) { 531 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 532 fail |= 0x02; 533 } else { 534 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 535 fail |= 0x02; 536 } 537 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 538 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 539 fail |= 0x04; 540 } else { 541 /* XXX does this mean privacy is supported or required? */ 542 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 543 fail |= 0x04; 544 } 545 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 546 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 547 if (rate & IEEE80211_RATE_BASIC) 548 fail |= 0x08; 549 if (vap->iv_des_nssid != 0 && 550 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 551 fail |= 0x10; 552 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 553 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 554 fail |= 0x20; 555 556 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 557 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 558 printf(" %3d%c", 559 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 560 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 561 fail & 0x08 ? '!' : ' '); 562 printf(" %4s%c", 563 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 564 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 565 "????", 566 fail & 0x02 ? '!' : ' '); 567 printf(" %3s%c ", 568 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 569 fail & 0x04 ? '!' : ' '); 570 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 571 printf("%s\n", fail & 0x10 ? "!" : ""); 572 } 573 #endif /* IEEE80211_DEBUG */ 574 575 576 int 577 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 578 { 579 struct ieee80211vap *vap = ni->ni_vap; 580 581 if (ni == vap->iv_bss || 582 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 583 /* unchanged, nothing to do */ 584 return 0; 585 } 586 587 if (!check_bss(vap, ni)) { 588 /* capabilities mismatch */ 589 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 590 "%s: merge failed, capabilities mismatch\n", __func__); 591 #ifdef IEEE80211_DEBUG 592 if (ieee80211_msg_assoc(vap)) 593 check_bss_debug(vap, ni); 594 #endif 595 vap->iv_stats.is_ibss_capmismatch++; 596 return 0; 597 } 598 599 return 1; 600 } 601 602 /* 603 * Check if the given node should populate the node table. 604 * 605 * We need to be in "see all beacons for all ssids" mode in order 606 * to do IBSS merges, however this means we will populate nodes for 607 * /all/ IBSS SSIDs, versus just the one we care about. 608 * 609 * So this check ensures the node can actually belong to our IBSS 610 * configuration. For now it simply checks the SSID. 611 */ 612 int 613 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 614 const struct ieee80211_scanparams *scan) 615 { 616 struct ieee80211vap *vap = ni->ni_vap; 617 int i; 618 619 /* 620 * If we have no SSID and no scan SSID, return OK. 621 */ 622 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 623 goto ok; 624 625 /* 626 * If we have one of (SSID, scan SSID) then return error. 627 */ 628 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 629 goto mismatch; 630 631 /* 632 * Double-check - we need scan SSID. 633 */ 634 if (scan->ssid == NULL) 635 goto mismatch; 636 637 /* 638 * Check if the scan SSID matches the SSID list for the VAP. 639 */ 640 for (i = 0; i < vap->iv_des_nssid; i++) { 641 642 /* Sanity length check */ 643 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 644 continue; 645 646 /* Note: SSID in the scan entry is the IE format */ 647 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 648 vap->iv_des_ssid[i].len) == 0) 649 goto ok; 650 } 651 652 mismatch: 653 return (0); 654 ok: 655 return (1); 656 } 657 658 /* 659 * Handle 802.11 ad hoc network merge. The 660 * convention, set by the Wireless Ethernet Compatibility Alliance 661 * (WECA), is that an 802.11 station will change its BSSID to match 662 * the "oldest" 802.11 ad hoc network, on the same channel, that 663 * has the station's desired SSID. The "oldest" 802.11 network 664 * sends beacons with the greatest TSF timestamp. 665 * 666 * The caller is assumed to validate TSF's before attempting a merge. 667 * 668 * Return !0 if the BSSID changed, 0 otherwise. 669 */ 670 int 671 ieee80211_ibss_merge(struct ieee80211_node *ni) 672 { 673 #ifdef IEEE80211_DEBUG 674 struct ieee80211vap *vap = ni->ni_vap; 675 struct ieee80211com *ic = ni->ni_ic; 676 #endif 677 678 if (! ieee80211_ibss_merge_check(ni)) 679 return 0; 680 681 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 682 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 683 ether_sprintf(ni->ni_bssid), 684 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 685 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 686 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 687 ); 688 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 689 } 690 691 /* 692 * Calculate HT channel promotion flags for all vaps. 693 * This assumes ni_chan have been setup for each vap. 694 */ 695 static int 696 gethtadjustflags(struct ieee80211com *ic) 697 { 698 struct ieee80211vap *vap; 699 int flags; 700 701 flags = 0; 702 /* XXX locking */ 703 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 704 if (vap->iv_state < IEEE80211_S_RUN) 705 continue; 706 switch (vap->iv_opmode) { 707 case IEEE80211_M_WDS: 708 case IEEE80211_M_STA: 709 case IEEE80211_M_AHDEMO: 710 case IEEE80211_M_HOSTAP: 711 case IEEE80211_M_IBSS: 712 case IEEE80211_M_MBSS: 713 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 714 break; 715 default: 716 break; 717 } 718 } 719 return flags; 720 } 721 722 /* 723 * Calculate VHT channel promotion flags for all vaps. 724 * This assumes ni_chan have been setup for each vap. 725 */ 726 static int 727 getvhtadjustflags(struct ieee80211com *ic) 728 { 729 struct ieee80211vap *vap; 730 int flags; 731 732 flags = 0; 733 /* XXX locking */ 734 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 735 if (vap->iv_state < IEEE80211_S_RUN) 736 continue; 737 switch (vap->iv_opmode) { 738 case IEEE80211_M_WDS: 739 case IEEE80211_M_STA: 740 case IEEE80211_M_AHDEMO: 741 case IEEE80211_M_HOSTAP: 742 case IEEE80211_M_IBSS: 743 case IEEE80211_M_MBSS: 744 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 745 break; 746 default: 747 break; 748 } 749 } 750 return flags; 751 } 752 753 /* 754 * Check if the current channel needs to change based on whether 755 * any vap's are using HT20/HT40. This is used to sync the state 756 * of ic_curchan after a channel width change on a running vap. 757 * 758 * Same applies for VHT. 759 */ 760 void 761 ieee80211_sync_curchan(struct ieee80211com *ic) 762 { 763 struct ieee80211_channel *c; 764 765 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 766 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 767 768 if (c != ic->ic_curchan) { 769 ic->ic_curchan = c; 770 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 771 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 772 IEEE80211_UNLOCK(ic); 773 ic->ic_set_channel(ic); 774 ieee80211_radiotap_chan_change(ic); 775 IEEE80211_LOCK(ic); 776 } 777 } 778 779 /* 780 * Setup the current channel. The request channel may be 781 * promoted if other vap's are operating with HT20/HT40. 782 */ 783 void 784 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 785 { 786 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 787 int flags = gethtadjustflags(ic); 788 /* 789 * Check for channel promotion required to support the 790 * set of running vap's. This assumes we are called 791 * after ni_chan is setup for each vap. 792 */ 793 /* XXX VHT? */ 794 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 795 if (flags > ieee80211_htchanflags(c)) 796 c = ieee80211_ht_adjust_channel(ic, c, flags); 797 } 798 799 /* 800 * VHT promotion - this will at least promote to VHT20/40 801 * based on what HT has done; it may further promote the 802 * channel to VHT80 or above. 803 */ 804 if (ic->ic_vhtcaps != 0) { 805 int flags = getvhtadjustflags(ic); 806 if (flags > ieee80211_vhtchanflags(c)) 807 c = ieee80211_vht_adjust_channel(ic, c, flags); 808 } 809 810 ic->ic_bsschan = ic->ic_curchan = c; 811 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 812 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 813 } 814 815 /* 816 * Change the current channel. The channel change is guaranteed to have 817 * happened before the next state change. 818 */ 819 void 820 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 821 { 822 ieee80211_setupcurchan(ic, c); 823 ieee80211_runtask(ic, &ic->ic_chan_task); 824 } 825 826 void 827 ieee80211_update_chw(struct ieee80211com *ic) 828 { 829 830 ieee80211_setupcurchan(ic, ic->ic_curchan); 831 ieee80211_runtask(ic, &ic->ic_chw_task); 832 } 833 834 /* 835 * Join the specified IBSS/BSS network. The node is assumed to 836 * be passed in with a held reference. 837 */ 838 static int 839 ieee80211_sta_join1(struct ieee80211_node *selbs) 840 { 841 struct ieee80211vap *vap = selbs->ni_vap; 842 struct ieee80211com *ic = selbs->ni_ic; 843 struct ieee80211_node *obss; 844 int canreassoc; 845 846 /* 847 * Committed to selbs, setup state. 848 */ 849 obss = vap->iv_bss; 850 /* 851 * Check if old+new node have the same address in which 852 * case we can reassociate when operating in sta mode. 853 */ 854 canreassoc = (obss != NULL && 855 vap->iv_state == IEEE80211_S_RUN && 856 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 857 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 858 if (obss != NULL) { 859 struct ieee80211_node_table *nt = obss->ni_table; 860 861 copy_bss(selbs, obss); 862 ieee80211_node_decref(obss); /* iv_bss reference */ 863 864 IEEE80211_NODE_LOCK(nt); 865 node_reclaim(nt, obss); /* station table reference */ 866 IEEE80211_NODE_UNLOCK(nt); 867 868 obss = NULL; /* NB: guard against later use */ 869 } 870 871 /* 872 * Delete unusable rates; we've already checked 873 * that the negotiated rate set is acceptable. 874 */ 875 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 876 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 877 878 ieee80211_setcurchan(ic, selbs->ni_chan); 879 /* 880 * Set the erp state (mostly the slot time) to deal with 881 * the auto-select case; this should be redundant if the 882 * mode is locked. 883 */ 884 ieee80211_reset_erp(ic); 885 ieee80211_wme_initparams(vap); 886 887 if (vap->iv_opmode == IEEE80211_M_STA) { 888 if (canreassoc) { 889 /* Reassociate */ 890 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 891 } else { 892 /* 893 * Act as if we received a DEAUTH frame in case we 894 * are invoked from the RUN state. This will cause 895 * us to try to re-authenticate if we are operating 896 * as a station. 897 */ 898 ieee80211_new_state(vap, IEEE80211_S_AUTH, 899 IEEE80211_FC0_SUBTYPE_DEAUTH); 900 } 901 } else 902 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 903 return 1; 904 } 905 906 int 907 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 908 const struct ieee80211_scan_entry *se) 909 { 910 struct ieee80211com *ic = vap->iv_ic; 911 struct ieee80211_node *ni; 912 int do_ht = 0; 913 914 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 915 if (ni == NULL) { 916 /* XXX msg */ 917 return 0; 918 } 919 920 /* 921 * Expand scan state into node's format. 922 * XXX may not need all this stuff 923 */ 924 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 925 ni->ni_esslen = se->se_ssid[1]; 926 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 927 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 928 ni->ni_intval = se->se_intval; 929 ni->ni_capinfo = se->se_capinfo; 930 ni->ni_chan = chan; 931 ni->ni_timoff = se->se_timoff; 932 ni->ni_fhdwell = se->se_fhdwell; 933 ni->ni_fhindex = se->se_fhindex; 934 ni->ni_erp = se->se_erp; 935 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 936 ni->ni_noise = se->se_noise; 937 if (vap->iv_opmode == IEEE80211_M_STA) { 938 /* NB: only infrastructure mode requires an associd */ 939 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 940 } 941 942 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 943 ieee80211_ies_expand(&ni->ni_ies); 944 #ifdef IEEE80211_SUPPORT_SUPERG 945 if (ni->ni_ies.ath_ie != NULL) 946 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 947 #endif 948 if (ni->ni_ies.htcap_ie != NULL) 949 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 950 if (ni->ni_ies.htinfo_ie != NULL) 951 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 952 #ifdef IEEE80211_SUPPORT_MESH 953 if (ni->ni_ies.meshid_ie != NULL) 954 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 955 #endif 956 #ifdef IEEE80211_SUPPORT_TDMA 957 if (ni->ni_ies.tdma_ie != NULL) 958 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 959 #endif 960 if (ni->ni_ies.vhtcap_ie != NULL) 961 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 962 if (ni->ni_ies.vhtopmode_ie != NULL) 963 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 964 965 /* XXX parse BSSLOAD IE */ 966 /* XXX parse TXPWRENV IE */ 967 /* XXX parse APCHANREP IE */ 968 } 969 970 vap->iv_dtim_period = se->se_dtimperiod; 971 vap->iv_dtim_count = 0; 972 973 /* NB: must be after ni_chan is setup */ 974 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 975 IEEE80211_F_DOSORT); 976 if (ieee80211_iserp_rateset(&ni->ni_rates)) 977 ni->ni_flags |= IEEE80211_NODE_ERP; 978 979 /* 980 * Setup HT state for this node if it's available, otherwise 981 * non-STA modes won't pick this state up. 982 * 983 * For IBSS and related modes that don't go through an 984 * association request/response, the only appropriate place 985 * to setup the HT state is here. 986 */ 987 if (ni->ni_ies.htinfo_ie != NULL && 988 ni->ni_ies.htcap_ie != NULL && 989 vap->iv_flags_ht & IEEE80211_FHT_HT) { 990 ieee80211_ht_node_init(ni); 991 ieee80211_ht_updateparams(ni, 992 ni->ni_ies.htcap_ie, 993 ni->ni_ies.htinfo_ie); 994 do_ht = 1; 995 } 996 997 /* 998 * Setup VHT state for this node if it's available. 999 * Same as the above. 1000 * 1001 * For now, don't allow 2GHz VHT operation. 1002 */ 1003 if (ni->ni_ies.vhtopmode_ie != NULL && 1004 ni->ni_ies.vhtcap_ie != NULL && 1005 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1006 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1007 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1008 __func__, 1009 ni->ni_macaddr, 1010 ":"); 1011 } else { 1012 ieee80211_vht_node_init(ni); 1013 ieee80211_vht_updateparams(ni, 1014 ni->ni_ies.vhtcap_ie, 1015 ni->ni_ies.vhtopmode_ie); 1016 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1017 ni->ni_ies.vhtopmode_ie); 1018 do_ht = 1; 1019 } 1020 } 1021 1022 /* Finally do the node channel change */ 1023 if (do_ht) { 1024 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1025 ni->ni_ies.htinfo_ie); 1026 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1027 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1028 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1029 } 1030 1031 /* XXX else check for ath FF? */ 1032 /* XXX QoS? Difficult given that WME config is specific to a master */ 1033 1034 ieee80211_node_setuptxparms(ni); 1035 ieee80211_ratectl_node_init(ni); 1036 1037 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1038 } 1039 1040 /* 1041 * Leave the specified IBSS/BSS network. The node is assumed to 1042 * be passed in with a held reference. 1043 */ 1044 void 1045 ieee80211_sta_leave(struct ieee80211_node *ni) 1046 { 1047 struct ieee80211com *ic = ni->ni_ic; 1048 1049 ic->ic_node_cleanup(ni); 1050 ieee80211_notify_node_leave(ni); 1051 } 1052 1053 /* 1054 * Send a deauthenticate frame and drop the station. 1055 */ 1056 void 1057 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1058 { 1059 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1060 ieee80211_ref_node(ni); 1061 if (ni->ni_associd != 0) 1062 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1063 ieee80211_node_leave(ni); 1064 ieee80211_free_node(ni); 1065 } 1066 1067 static struct ieee80211_node * 1068 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1069 { 1070 struct ieee80211_node *ni; 1071 1072 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1073 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1074 return ni; 1075 } 1076 1077 /* 1078 * Initialize an ie blob with the specified data. If previous 1079 * data exists re-use the data block. As a side effect we clear 1080 * all references to specific ie's; the caller is required to 1081 * recalculate them. 1082 */ 1083 int 1084 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1085 { 1086 /* NB: assumes data+len are the last fields */ 1087 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1088 if (ies->data != NULL && ies->len != len) { 1089 /* data size changed */ 1090 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1091 ies->data = NULL; 1092 } 1093 if (ies->data == NULL) { 1094 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1095 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1096 if (ies->data == NULL) { 1097 ies->len = 0; 1098 /* NB: pointers have already been zero'd above */ 1099 return 0; 1100 } 1101 } 1102 memcpy(ies->data, data, len); 1103 ies->len = len; 1104 return 1; 1105 } 1106 1107 /* 1108 * Reclaim storage for an ie blob. 1109 */ 1110 void 1111 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1112 { 1113 if (ies->data != NULL) 1114 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1115 } 1116 1117 /* 1118 * Expand an ie blob data contents and to fillin individual 1119 * ie pointers. The data blob is assumed to be well-formed; 1120 * we don't do any validity checking of ie lengths. 1121 */ 1122 void 1123 ieee80211_ies_expand(struct ieee80211_ies *ies) 1124 { 1125 uint8_t *ie; 1126 int ielen; 1127 1128 ie = ies->data; 1129 ielen = ies->len; 1130 while (ielen > 0) { 1131 switch (ie[0]) { 1132 case IEEE80211_ELEMID_VENDOR: 1133 if (iswpaoui(ie)) 1134 ies->wpa_ie = ie; 1135 else if (iswmeoui(ie)) 1136 ies->wme_ie = ie; 1137 #ifdef IEEE80211_SUPPORT_SUPERG 1138 else if (isatherosoui(ie)) 1139 ies->ath_ie = ie; 1140 #endif 1141 #ifdef IEEE80211_SUPPORT_TDMA 1142 else if (istdmaoui(ie)) 1143 ies->tdma_ie = ie; 1144 #endif 1145 break; 1146 case IEEE80211_ELEMID_RSN: 1147 ies->rsn_ie = ie; 1148 break; 1149 case IEEE80211_ELEMID_HTCAP: 1150 ies->htcap_ie = ie; 1151 break; 1152 case IEEE80211_ELEMID_HTINFO: 1153 ies->htinfo_ie = ie; 1154 break; 1155 #ifdef IEEE80211_SUPPORT_MESH 1156 case IEEE80211_ELEMID_MESHID: 1157 ies->meshid_ie = ie; 1158 break; 1159 #endif 1160 case IEEE80211_ELEMID_VHT_CAP: 1161 ies->vhtcap_ie = ie; 1162 break; 1163 case IEEE80211_ELEMID_VHT_OPMODE: 1164 ies->vhtopmode_ie = ie; 1165 break; 1166 case IEEE80211_ELEMID_VHT_PWR_ENV: 1167 ies->vhtpwrenv_ie = ie; 1168 break; 1169 case IEEE80211_ELEMID_BSSLOAD: 1170 ies->bssload_ie = ie; 1171 break; 1172 case IEEE80211_ELEMID_APCHANREP: 1173 ies->apchanrep_ie = ie; 1174 break; 1175 } 1176 ielen -= 2 + ie[1]; 1177 ie += 2 + ie[1]; 1178 } 1179 } 1180 1181 /* 1182 * Reclaim any resources in a node and reset any critical 1183 * state. Typically nodes are free'd immediately after, 1184 * but in some cases the storage may be reused so we need 1185 * to insure consistent state (should probably fix that). 1186 */ 1187 static void 1188 node_cleanup(struct ieee80211_node *ni) 1189 { 1190 struct ieee80211vap *vap = ni->ni_vap; 1191 struct ieee80211com *ic = ni->ni_ic; 1192 int i; 1193 1194 /* NB: preserve ni_table */ 1195 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1196 if (vap->iv_opmode != IEEE80211_M_STA) 1197 vap->iv_ps_sta--; 1198 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1199 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1200 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1201 } 1202 /* 1203 * Cleanup any VHT and HT-related state. 1204 */ 1205 if (ni->ni_flags & IEEE80211_NODE_VHT) 1206 ieee80211_vht_node_cleanup(ni); 1207 if (ni->ni_flags & IEEE80211_NODE_HT) 1208 ieee80211_ht_node_cleanup(ni); 1209 #ifdef IEEE80211_SUPPORT_SUPERG 1210 /* Always do FF node cleanup; for A-MSDU */ 1211 ieee80211_ff_node_cleanup(ni); 1212 #endif 1213 #ifdef IEEE80211_SUPPORT_MESH 1214 /* 1215 * Cleanup any mesh-related state. 1216 */ 1217 if (vap->iv_opmode == IEEE80211_M_MBSS) 1218 ieee80211_mesh_node_cleanup(ni); 1219 #endif 1220 /* 1221 * Clear any staging queue entries. 1222 */ 1223 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1224 1225 /* 1226 * Clear AREF flag that marks the authorization refcnt bump 1227 * has happened. This is probably not needed as the node 1228 * should always be removed from the table so not found but 1229 * do it just in case. 1230 * Likewise clear the ASSOCID flag as these flags are intended 1231 * to be managed in tandem. 1232 */ 1233 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1234 1235 /* 1236 * Drain power save queue and, if needed, clear TIM. 1237 */ 1238 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1239 vap->iv_set_tim(ni, 0); 1240 1241 ni->ni_associd = 0; 1242 if (ni->ni_challenge != NULL) { 1243 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1244 ni->ni_challenge = NULL; 1245 } 1246 /* 1247 * Preserve SSID, WPA, and WME ie's so the bss node is 1248 * reusable during a re-auth/re-assoc state transition. 1249 * If we remove these data they will not be recreated 1250 * because they come from a probe-response or beacon frame 1251 * which cannot be expected prior to the association-response. 1252 * This should not be an issue when operating in other modes 1253 * as stations leaving always go through a full state transition 1254 * which will rebuild this state. 1255 * 1256 * XXX does this leave us open to inheriting old state? 1257 */ 1258 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1259 if (ni->ni_rxfrag[i] != NULL) { 1260 m_freem(ni->ni_rxfrag[i]); 1261 ni->ni_rxfrag[i] = NULL; 1262 } 1263 /* 1264 * Must be careful here to remove any key map entry w/o a LOR. 1265 */ 1266 ieee80211_node_delucastkey(ni); 1267 } 1268 1269 static void 1270 node_free(struct ieee80211_node *ni) 1271 { 1272 struct ieee80211com *ic = ni->ni_ic; 1273 1274 ieee80211_ratectl_node_deinit(ni); 1275 ic->ic_node_cleanup(ni); 1276 ieee80211_ies_cleanup(&ni->ni_ies); 1277 ieee80211_psq_cleanup(&ni->ni_psq); 1278 IEEE80211_FREE(ni, M_80211_NODE); 1279 } 1280 1281 static void 1282 node_age(struct ieee80211_node *ni) 1283 { 1284 struct ieee80211vap *vap = ni->ni_vap; 1285 1286 /* 1287 * Age frames on the power save queue. 1288 */ 1289 if (ieee80211_node_psq_age(ni) != 0 && 1290 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1291 vap->iv_set_tim(ni, 0); 1292 /* 1293 * Age out HT resources (e.g. frames on the 1294 * A-MPDU reorder queues). 1295 */ 1296 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1297 ieee80211_ht_node_age(ni); 1298 } 1299 1300 static int8_t 1301 node_getrssi(const struct ieee80211_node *ni) 1302 { 1303 uint32_t avgrssi = ni->ni_avgrssi; 1304 int32_t rssi; 1305 1306 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1307 return 0; 1308 rssi = IEEE80211_RSSI_GET(avgrssi); 1309 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1310 } 1311 1312 static void 1313 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1314 { 1315 *rssi = node_getrssi(ni); 1316 *noise = ni->ni_noise; 1317 } 1318 1319 static void 1320 node_getmimoinfo(const struct ieee80211_node *ni, 1321 struct ieee80211_mimo_info *info) 1322 { 1323 int i; 1324 uint32_t avgrssi; 1325 int32_t rssi; 1326 1327 bzero(info, sizeof(*info)); 1328 1329 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1330 /* Note: for now, just pri20 channel info */ 1331 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1332 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1333 info->ch[i].rssi[0] = 0; 1334 } else { 1335 rssi = IEEE80211_RSSI_GET(avgrssi); 1336 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1337 } 1338 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1339 } 1340 1341 /* XXX ext radios? */ 1342 1343 /* XXX EVM? */ 1344 } 1345 1346 static void 1347 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1348 struct ieee80211_node *ni) 1349 { 1350 struct ieee80211com *ic = nt->nt_ic; 1351 int hash; 1352 1353 IEEE80211_NODE_LOCK_ASSERT(nt); 1354 1355 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1356 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1357 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1358 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1359 nt->nt_count++; 1360 ni->ni_table = nt; 1361 } 1362 1363 static void 1364 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1365 struct ieee80211_node *ni) 1366 { 1367 1368 IEEE80211_NODE_LOCK_ASSERT(nt); 1369 1370 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1371 LIST_REMOVE(ni, ni_hash); 1372 nt->nt_count--; 1373 KASSERT(nt->nt_count >= 0, 1374 ("nt_count is negative (%d)!\n", nt->nt_count)); 1375 ni->ni_table = NULL; 1376 } 1377 1378 struct ieee80211_node * 1379 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1380 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1381 { 1382 struct ieee80211com *ic = nt->nt_ic; 1383 struct ieee80211_node *ni; 1384 1385 ni = ic->ic_node_alloc(vap, macaddr); 1386 if (ni == NULL) { 1387 vap->iv_stats.is_rx_nodealloc++; 1388 return NULL; 1389 } 1390 1391 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1392 "%s %p<%s> in %s table\n", __func__, ni, 1393 ether_sprintf(macaddr), nt->nt_name); 1394 1395 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1396 ieee80211_node_initref(ni); /* mark referenced */ 1397 ni->ni_chan = IEEE80211_CHAN_ANYC; 1398 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1399 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1400 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1401 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1402 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1403 ni->ni_inact_reload = nt->nt_inact_init; 1404 ni->ni_inact = ni->ni_inact_reload; 1405 ni->ni_ath_defkeyix = 0x7fff; 1406 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1407 #ifdef IEEE80211_SUPPORT_MESH 1408 if (vap->iv_opmode == IEEE80211_M_MBSS) 1409 ieee80211_mesh_node_init(vap, ni); 1410 #endif 1411 IEEE80211_NODE_LOCK(nt); 1412 ieee80211_add_node_nt(nt, ni); 1413 ni->ni_vap = vap; 1414 ni->ni_ic = ic; 1415 IEEE80211_NODE_UNLOCK(nt); 1416 1417 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1418 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1419 1420 return ni; 1421 } 1422 1423 /* 1424 * Craft a temporary node suitable for sending a management frame 1425 * to the specified station. We craft only as much state as we 1426 * need to do the work since the node will be immediately reclaimed 1427 * once the send completes. 1428 */ 1429 struct ieee80211_node * 1430 ieee80211_tmp_node(struct ieee80211vap *vap, 1431 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1432 { 1433 struct ieee80211com *ic = vap->iv_ic; 1434 struct ieee80211_node *ni; 1435 1436 ni = ic->ic_node_alloc(vap, macaddr); 1437 if (ni != NULL) { 1438 struct ieee80211_node *bss = vap->iv_bss; 1439 1440 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1441 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1442 1443 ni->ni_table = NULL; /* NB: pedantic */ 1444 ni->ni_ic = ic; /* NB: needed to set channel */ 1445 ni->ni_vap = vap; 1446 1447 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1448 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1449 ieee80211_node_initref(ni); /* mark referenced */ 1450 /* NB: required by ieee80211_fix_rate */ 1451 ieee80211_node_set_chan(ni, bss->ni_chan); 1452 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1453 IEEE80211_KEYIX_NONE); 1454 ni->ni_txpower = bss->ni_txpower; 1455 /* XXX optimize away */ 1456 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1457 1458 ieee80211_ratectl_node_init(ni); 1459 } else { 1460 /* XXX msg */ 1461 vap->iv_stats.is_rx_nodealloc++; 1462 } 1463 return ni; 1464 } 1465 1466 struct ieee80211_node * 1467 ieee80211_dup_bss(struct ieee80211vap *vap, 1468 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1469 { 1470 struct ieee80211com *ic = vap->iv_ic; 1471 struct ieee80211_node *ni; 1472 1473 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1474 if (ni != NULL) { 1475 struct ieee80211_node *bss = vap->iv_bss; 1476 /* 1477 * Inherit from iv_bss. 1478 */ 1479 copy_bss(ni, bss); 1480 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1481 ieee80211_node_set_chan(ni, bss->ni_chan); 1482 } 1483 return ni; 1484 } 1485 1486 /* 1487 * Create a bss node for a legacy WDS vap. The far end does 1488 * not associate so we just create create a new node and 1489 * simulate an association. The caller is responsible for 1490 * installing the node as the bss node and handling any further 1491 * setup work like authorizing the port. 1492 */ 1493 struct ieee80211_node * 1494 ieee80211_node_create_wds(struct ieee80211vap *vap, 1495 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1496 { 1497 struct ieee80211com *ic = vap->iv_ic; 1498 struct ieee80211_node *ni; 1499 1500 /* XXX check if node already in sta table? */ 1501 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1502 if (ni != NULL) { 1503 ni->ni_wdsvap = vap; 1504 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1505 /* 1506 * Inherit any manually configured settings. 1507 */ 1508 copy_bss(ni, vap->iv_bss); 1509 ieee80211_node_set_chan(ni, chan); 1510 /* NB: propagate ssid so available to WPA supplicant */ 1511 ni->ni_esslen = vap->iv_des_ssid[0].len; 1512 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1513 /* NB: no associd for peer */ 1514 /* 1515 * There are no management frames to use to 1516 * discover neighbor capabilities, so blindly 1517 * propagate the local configuration. 1518 */ 1519 if (vap->iv_flags & IEEE80211_F_WME) 1520 ni->ni_flags |= IEEE80211_NODE_QOS; 1521 #ifdef IEEE80211_SUPPORT_SUPERG 1522 if (vap->iv_flags & IEEE80211_F_FF) 1523 ni->ni_flags |= IEEE80211_NODE_FF; 1524 #endif 1525 /* XXX VHT */ 1526 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1527 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1528 /* 1529 * Device is HT-capable and HT is enabled for 1530 * the vap; setup HT operation. On return 1531 * ni_chan will be adjusted to an HT channel. 1532 */ 1533 ieee80211_ht_wds_init(ni); 1534 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1535 printf("%s: TODO: vht_wds_init\n", __func__); 1536 } 1537 } else { 1538 struct ieee80211_channel *c = ni->ni_chan; 1539 /* 1540 * Force a legacy channel to be used. 1541 */ 1542 c = ieee80211_find_channel(ic, 1543 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1544 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1545 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1546 ni->ni_chan = c; 1547 } 1548 } 1549 return ni; 1550 } 1551 1552 struct ieee80211_node * 1553 #ifdef IEEE80211_DEBUG_REFCNT 1554 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1555 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1556 #else 1557 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1558 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1559 #endif 1560 { 1561 struct ieee80211_node *ni; 1562 int hash; 1563 1564 IEEE80211_NODE_LOCK_ASSERT(nt); 1565 1566 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1567 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1568 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1569 ieee80211_ref_node(ni); /* mark referenced */ 1570 #ifdef IEEE80211_DEBUG_REFCNT 1571 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1572 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1573 func, line, 1574 ni, ether_sprintf(ni->ni_macaddr), 1575 ieee80211_node_refcnt(ni)); 1576 #endif 1577 return ni; 1578 } 1579 } 1580 return NULL; 1581 } 1582 1583 struct ieee80211_node * 1584 #ifdef IEEE80211_DEBUG_REFCNT 1585 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1586 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1587 #else 1588 ieee80211_find_node(struct ieee80211_node_table *nt, 1589 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1590 #endif 1591 { 1592 struct ieee80211_node *ni; 1593 1594 IEEE80211_NODE_LOCK(nt); 1595 ni = ieee80211_find_node_locked(nt, macaddr); 1596 IEEE80211_NODE_UNLOCK(nt); 1597 return ni; 1598 } 1599 1600 struct ieee80211_node * 1601 #ifdef IEEE80211_DEBUG_REFCNT 1602 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1603 const struct ieee80211vap *vap, 1604 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1605 #else 1606 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1607 const struct ieee80211vap *vap, 1608 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1609 #endif 1610 { 1611 struct ieee80211_node *ni; 1612 int hash; 1613 1614 IEEE80211_NODE_LOCK_ASSERT(nt); 1615 1616 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1617 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1618 if (ni->ni_vap == vap && 1619 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1620 ieee80211_ref_node(ni); /* mark referenced */ 1621 #ifdef IEEE80211_DEBUG_REFCNT 1622 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1623 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1624 func, line, 1625 ni, ether_sprintf(ni->ni_macaddr), 1626 ieee80211_node_refcnt(ni)); 1627 #endif 1628 return ni; 1629 } 1630 } 1631 return NULL; 1632 } 1633 1634 struct ieee80211_node * 1635 #ifdef IEEE80211_DEBUG_REFCNT 1636 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1637 const struct ieee80211vap *vap, 1638 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1639 #else 1640 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1641 const struct ieee80211vap *vap, 1642 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1643 #endif 1644 { 1645 struct ieee80211_node *ni; 1646 1647 IEEE80211_NODE_LOCK(nt); 1648 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1649 IEEE80211_NODE_UNLOCK(nt); 1650 return ni; 1651 } 1652 1653 /* 1654 * Fake up a node; this handles node discovery in adhoc mode. 1655 * Note that for the driver's benefit we we treat this like 1656 * an association so the driver has an opportunity to setup 1657 * it's private state. 1658 */ 1659 struct ieee80211_node * 1660 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1661 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1662 { 1663 struct ieee80211_node *ni; 1664 1665 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1666 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1667 ni = ieee80211_dup_bss(vap, macaddr); 1668 if (ni != NULL) { 1669 struct ieee80211com *ic = vap->iv_ic; 1670 1671 /* XXX no rate negotiation; just dup */ 1672 ni->ni_rates = vap->iv_bss->ni_rates; 1673 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1674 ni->ni_flags |= IEEE80211_NODE_ERP; 1675 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1676 /* 1677 * In adhoc demo mode there are no management 1678 * frames to use to discover neighbor capabilities, 1679 * so blindly propagate the local configuration 1680 * so we can do interesting things (e.g. use 1681 * WME to disable ACK's). 1682 */ 1683 /* 1684 * XXX TODO: 11n? 1685 */ 1686 if (vap->iv_flags & IEEE80211_F_WME) 1687 ni->ni_flags |= IEEE80211_NODE_QOS; 1688 #ifdef IEEE80211_SUPPORT_SUPERG 1689 if (vap->iv_flags & IEEE80211_F_FF) 1690 ni->ni_flags |= IEEE80211_NODE_FF; 1691 #endif 1692 } 1693 ieee80211_node_setuptxparms(ni); 1694 ieee80211_ratectl_node_init(ni); 1695 1696 /* 1697 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1698 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1699 * that after we hear that we can indeed do 11n 1700 * (either by a beacon frame or by a probe response.) 1701 */ 1702 1703 /* 1704 * This is the first time we see the node. 1705 */ 1706 if (ic->ic_newassoc != NULL) 1707 ic->ic_newassoc(ni, 1); 1708 1709 /* 1710 * Kick off a probe request to the given node; 1711 * we will then use the probe response to update 1712 * 11n/etc configuration state. 1713 * 1714 * XXX TODO: this isn't guaranteed, and until we get 1715 * a probe response, we won't be able to actually 1716 * do anything 802.11n related to the node. 1717 * So if this does indeed work, maybe we should hold 1718 * off on sending responses until we get the probe 1719 * response, or just default to some sensible subset 1720 * of 802.11n behaviour (eg always allow aggregation 1721 * negotiation TO us, but not FROM us, etc) so we 1722 * aren't entirely busted. 1723 */ 1724 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1725 ieee80211_send_probereq(ni, /* node */ 1726 vap->iv_myaddr, /* SA */ 1727 ni->ni_macaddr, /* DA */ 1728 vap->iv_bss->ni_bssid, /* BSSID */ 1729 vap->iv_bss->ni_essid, 1730 vap->iv_bss->ni_esslen); /* SSID */ 1731 } 1732 1733 /* XXX not right for 802.1x/WPA */ 1734 ieee80211_node_authorize(ni); 1735 } 1736 return ni; 1737 } 1738 1739 void 1740 ieee80211_init_neighbor(struct ieee80211_node *ni, 1741 const struct ieee80211_frame *wh, 1742 const struct ieee80211_scanparams *sp) 1743 { 1744 int do_ht_setup = 0, do_vht_setup = 0; 1745 1746 ni->ni_esslen = sp->ssid[1]; 1747 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1748 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1749 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1750 ni->ni_intval = sp->bintval; 1751 ni->ni_capinfo = sp->capinfo; 1752 ni->ni_chan = ni->ni_ic->ic_curchan; 1753 ni->ni_fhdwell = sp->fhdwell; 1754 ni->ni_fhindex = sp->fhindex; 1755 ni->ni_erp = sp->erp; 1756 ni->ni_timoff = sp->timoff; 1757 #ifdef IEEE80211_SUPPORT_MESH 1758 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1759 ieee80211_mesh_init_neighbor(ni, wh, sp); 1760 #endif 1761 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1762 ieee80211_ies_expand(&ni->ni_ies); 1763 if (ni->ni_ies.wme_ie != NULL) 1764 ni->ni_flags |= IEEE80211_NODE_QOS; 1765 else 1766 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1767 #ifdef IEEE80211_SUPPORT_SUPERG 1768 if (ni->ni_ies.ath_ie != NULL) 1769 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1770 #endif 1771 if (ni->ni_ies.htcap_ie != NULL) 1772 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1773 if (ni->ni_ies.htinfo_ie != NULL) 1774 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1775 1776 if (ni->ni_ies.vhtcap_ie != NULL) 1777 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1778 if (ni->ni_ies.vhtopmode_ie != NULL) 1779 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1780 1781 if ((ni->ni_ies.htcap_ie != NULL) && 1782 (ni->ni_ies.htinfo_ie != NULL) && 1783 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1784 do_ht_setup = 1; 1785 } 1786 1787 if ((ni->ni_ies.vhtcap_ie != NULL) && 1788 (ni->ni_ies.vhtopmode_ie != NULL) && 1789 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1790 do_vht_setup = 1; 1791 } 1792 1793 } 1794 1795 /* NB: must be after ni_chan is setup */ 1796 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1797 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1798 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1799 1800 /* 1801 * If the neighbor is HT compatible, flip that on. 1802 */ 1803 if (do_ht_setup) { 1804 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1805 "%s: doing HT setup\n", __func__); 1806 ieee80211_ht_node_init(ni); 1807 ieee80211_ht_updateparams(ni, 1808 ni->ni_ies.htcap_ie, 1809 ni->ni_ies.htinfo_ie); 1810 1811 if (do_vht_setup) { 1812 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1813 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1814 __func__, 1815 ni->ni_macaddr, 1816 ":"); 1817 } else { 1818 ieee80211_vht_node_init(ni); 1819 ieee80211_vht_updateparams(ni, 1820 ni->ni_ies.vhtcap_ie, 1821 ni->ni_ies.vhtopmode_ie); 1822 ieee80211_setup_vht_rates(ni, 1823 ni->ni_ies.vhtcap_ie, 1824 ni->ni_ies.vhtopmode_ie); 1825 } 1826 } 1827 1828 /* 1829 * Finally do the channel upgrade/change based 1830 * on the HT/VHT configuration. 1831 */ 1832 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1833 ni->ni_ies.htinfo_ie); 1834 ieee80211_setup_htrates(ni, 1835 ni->ni_ies.htcap_ie, 1836 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1837 ieee80211_setup_basic_htrates(ni, 1838 ni->ni_ies.htinfo_ie); 1839 1840 ieee80211_node_setuptxparms(ni); 1841 ieee80211_ratectl_node_init(ni); 1842 1843 /* Reassociate; we're now 11n/11ac */ 1844 /* 1845 * XXX TODO: this is the wrong thing to do - 1846 * we're calling it with isnew=1 so the ath(4) 1847 * driver reinitialises the rate tables. 1848 * This "mostly" works for ath(4), but it won't 1849 * be right for firmware devices which allocate 1850 * node states. 1851 * 1852 * So, do we just create a new node and delete 1853 * the old one? Or? 1854 */ 1855 if (ni->ni_ic->ic_newassoc) 1856 ni->ni_ic->ic_newassoc(ni, 1); 1857 } 1858 } 1859 1860 /* 1861 * Do node discovery in adhoc mode on receipt of a beacon 1862 * or probe response frame. Note that for the driver's 1863 * benefit we we treat this like an association so the 1864 * driver has an opportunity to setup it's private state. 1865 */ 1866 struct ieee80211_node * 1867 ieee80211_add_neighbor(struct ieee80211vap *vap, 1868 const struct ieee80211_frame *wh, 1869 const struct ieee80211_scanparams *sp) 1870 { 1871 struct ieee80211_node *ni; 1872 1873 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1874 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1875 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1876 if (ni != NULL) { 1877 struct ieee80211com *ic = vap->iv_ic; 1878 1879 ieee80211_init_neighbor(ni, wh, sp); 1880 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1881 ni->ni_flags |= IEEE80211_NODE_ERP; 1882 ieee80211_node_setuptxparms(ni); 1883 ieee80211_ratectl_node_init(ni); 1884 if (ic->ic_newassoc != NULL) 1885 ic->ic_newassoc(ni, 1); 1886 /* XXX not right for 802.1x/WPA */ 1887 ieee80211_node_authorize(ni); 1888 } 1889 return ni; 1890 } 1891 1892 #define IS_PROBEREQ(wh) \ 1893 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1894 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1895 #define IS_BCAST_PROBEREQ(wh) \ 1896 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1897 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1898 1899 static __inline struct ieee80211_node * 1900 _find_rxnode(struct ieee80211_node_table *nt, 1901 const struct ieee80211_frame_min *wh) 1902 { 1903 if (IS_BCAST_PROBEREQ(wh)) 1904 return NULL; /* spam bcast probe req to all vap's */ 1905 return ieee80211_find_node_locked(nt, wh->i_addr2); 1906 } 1907 1908 /* 1909 * Locate the node for sender, track state, and then pass the 1910 * (referenced) node up to the 802.11 layer for its use. Note 1911 * we can return NULL if the sender is not in the table. 1912 */ 1913 struct ieee80211_node * 1914 #ifdef IEEE80211_DEBUG_REFCNT 1915 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1916 const struct ieee80211_frame_min *wh, const char *func, int line) 1917 #else 1918 ieee80211_find_rxnode(struct ieee80211com *ic, 1919 const struct ieee80211_frame_min *wh) 1920 #endif 1921 { 1922 struct ieee80211_node_table *nt; 1923 struct ieee80211_node *ni; 1924 1925 nt = &ic->ic_sta; 1926 IEEE80211_NODE_LOCK(nt); 1927 ni = _find_rxnode(nt, wh); 1928 IEEE80211_NODE_UNLOCK(nt); 1929 1930 return ni; 1931 } 1932 1933 /* 1934 * Like ieee80211_find_rxnode but use the supplied h/w 1935 * key index as a hint to locate the node in the key 1936 * mapping table. If an entry is present at the key 1937 * index we return it; otherwise do a normal lookup and 1938 * update the mapping table if the station has a unicast 1939 * key assigned to it. 1940 */ 1941 struct ieee80211_node * 1942 #ifdef IEEE80211_DEBUG_REFCNT 1943 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1944 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1945 const char *func, int line) 1946 #else 1947 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1948 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1949 #endif 1950 { 1951 struct ieee80211_node_table *nt; 1952 struct ieee80211_node *ni; 1953 1954 nt = &ic->ic_sta; 1955 IEEE80211_NODE_LOCK(nt); 1956 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1957 ni = nt->nt_keyixmap[keyix]; 1958 else 1959 ni = NULL; 1960 if (ni == NULL) { 1961 ni = _find_rxnode(nt, wh); 1962 if (ni != NULL && nt->nt_keyixmap != NULL) { 1963 /* 1964 * If the station has a unicast key cache slot 1965 * assigned update the key->node mapping table. 1966 */ 1967 keyix = ni->ni_ucastkey.wk_rxkeyix; 1968 /* XXX can keyixmap[keyix] != NULL? */ 1969 if (keyix < nt->nt_keyixmax && 1970 nt->nt_keyixmap[keyix] == NULL) { 1971 IEEE80211_DPRINTF(ni->ni_vap, 1972 IEEE80211_MSG_NODE, 1973 "%s: add key map entry %p<%s> refcnt %d\n", 1974 __func__, ni, ether_sprintf(ni->ni_macaddr), 1975 ieee80211_node_refcnt(ni)+1); 1976 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1977 } 1978 } 1979 } else { 1980 if (IS_BCAST_PROBEREQ(wh)) 1981 ni = NULL; /* spam bcast probe req to all vap's */ 1982 else 1983 ieee80211_ref_node(ni); 1984 } 1985 IEEE80211_NODE_UNLOCK(nt); 1986 1987 return ni; 1988 } 1989 #undef IS_BCAST_PROBEREQ 1990 #undef IS_PROBEREQ 1991 1992 /* 1993 * Return a reference to the appropriate node for sending 1994 * a data frame. This handles node discovery in adhoc networks. 1995 */ 1996 struct ieee80211_node * 1997 #ifdef IEEE80211_DEBUG_REFCNT 1998 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1999 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2000 const char *func, int line) 2001 #else 2002 ieee80211_find_txnode(struct ieee80211vap *vap, 2003 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 2004 #endif 2005 { 2006 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2007 struct ieee80211_node *ni; 2008 2009 /* 2010 * The destination address should be in the node table 2011 * unless this is a multicast/broadcast frame. We can 2012 * also optimize station mode operation, all frames go 2013 * to the bss node. 2014 */ 2015 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2016 IEEE80211_NODE_LOCK(nt); 2017 if (vap->iv_opmode == IEEE80211_M_STA || 2018 vap->iv_opmode == IEEE80211_M_WDS || 2019 IEEE80211_IS_MULTICAST(macaddr)) 2020 ni = ieee80211_ref_node(vap->iv_bss); 2021 else 2022 ni = ieee80211_find_node_locked(nt, macaddr); 2023 IEEE80211_NODE_UNLOCK(nt); 2024 2025 if (ni == NULL) { 2026 if (vap->iv_opmode == IEEE80211_M_IBSS || 2027 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2028 /* 2029 * In adhoc mode cons up a node for the destination. 2030 * Note that we need an additional reference for the 2031 * caller to be consistent with 2032 * ieee80211_find_node_locked. 2033 */ 2034 /* 2035 * XXX TODO: this doesn't fake up 11n state; we need 2036 * to find another way to get it upgraded. 2037 */ 2038 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2039 if (ni != NULL) 2040 (void) ieee80211_ref_node(ni); 2041 } else { 2042 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2043 "no node, discard frame (%s)", __func__); 2044 vap->iv_stats.is_tx_nonode++; 2045 } 2046 } 2047 return ni; 2048 } 2049 2050 static void 2051 _ieee80211_free_node(struct ieee80211_node *ni) 2052 { 2053 struct ieee80211_node_table *nt = ni->ni_table; 2054 2055 /* 2056 * NB: careful about referencing the vap as it may be 2057 * gone if the last reference was held by a driver. 2058 * We know the com will always be present so it's safe 2059 * to use ni_ic below to reclaim resources. 2060 */ 2061 #if 0 2062 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2063 "%s %p<%s> in %s table\n", __func__, ni, 2064 ether_sprintf(ni->ni_macaddr), 2065 nt != NULL ? nt->nt_name : "<gone>"); 2066 #endif 2067 if (ni->ni_associd != 0) { 2068 struct ieee80211vap *vap = ni->ni_vap; 2069 if (vap->iv_aid_bitmap != NULL) 2070 IEEE80211_AID_CLR(vap, ni->ni_associd); 2071 } 2072 if (nt != NULL) 2073 ieee80211_del_node_nt(nt, ni); 2074 ni->ni_ic->ic_node_free(ni); 2075 } 2076 2077 /* 2078 * Clear any entry in the unicast key mapping table. 2079 */ 2080 static int 2081 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2082 { 2083 ieee80211_keyix keyix; 2084 2085 keyix = ni->ni_ucastkey.wk_rxkeyix; 2086 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2087 nt->nt_keyixmap[keyix] == ni) { 2088 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2089 "%s: %p<%s> clear key map entry %u\n", 2090 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2091 nt->nt_keyixmap[keyix] = NULL; 2092 ieee80211_node_decref(ni); 2093 return 1; 2094 } 2095 2096 return 0; 2097 } 2098 2099 void 2100 #ifdef IEEE80211_DEBUG_REFCNT 2101 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 2102 #else 2103 ieee80211_free_node(struct ieee80211_node *ni) 2104 #endif 2105 { 2106 struct ieee80211_node_table *nt = ni->ni_table; 2107 2108 #ifdef IEEE80211_DEBUG_REFCNT 2109 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2110 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2111 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2112 #endif 2113 if (nt != NULL) { 2114 IEEE80211_NODE_LOCK(nt); 2115 if (ieee80211_node_dectestref(ni)) { 2116 /* 2117 * Last reference, reclaim state. 2118 */ 2119 _ieee80211_free_node(ni); 2120 } else if (ieee80211_node_refcnt(ni) == 1) 2121 if (node_clear_keyixmap(nt, ni)) 2122 _ieee80211_free_node(ni); 2123 IEEE80211_NODE_UNLOCK(nt); 2124 } else { 2125 if (ieee80211_node_dectestref(ni)) 2126 _ieee80211_free_node(ni); 2127 } 2128 } 2129 2130 /* 2131 * Reclaim a unicast key and clear any key cache state. 2132 */ 2133 int 2134 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2135 { 2136 struct ieee80211com *ic = ni->ni_ic; 2137 struct ieee80211_node_table *nt = &ic->ic_sta; 2138 struct ieee80211_node *nikey; 2139 ieee80211_keyix keyix; 2140 int isowned, status; 2141 2142 /* 2143 * NB: We must beware of LOR here; deleting the key 2144 * can cause the crypto layer to block traffic updates 2145 * which can generate a LOR against the node table lock; 2146 * grab it here and stash the key index for our use below. 2147 * 2148 * Must also beware of recursion on the node table lock. 2149 * When called from node_cleanup we may already have 2150 * the node table lock held. Unfortunately there's no 2151 * way to separate out this path so we must do this 2152 * conditionally. 2153 */ 2154 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2155 if (!isowned) 2156 IEEE80211_NODE_LOCK(nt); 2157 nikey = NULL; 2158 status = 1; /* NB: success */ 2159 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2160 keyix = ni->ni_ucastkey.wk_rxkeyix; 2161 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2162 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2163 nikey = nt->nt_keyixmap[keyix]; 2164 nt->nt_keyixmap[keyix] = NULL; 2165 } 2166 } 2167 if (!isowned) 2168 IEEE80211_NODE_UNLOCK(nt); 2169 2170 if (nikey != NULL) { 2171 KASSERT(nikey == ni, 2172 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2173 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2174 "%s: delete key map entry %p<%s> refcnt %d\n", 2175 __func__, ni, ether_sprintf(ni->ni_macaddr), 2176 ieee80211_node_refcnt(ni)-1); 2177 ieee80211_free_node(ni); 2178 } 2179 return status; 2180 } 2181 2182 /* 2183 * Reclaim a node. If this is the last reference count then 2184 * do the normal free work. Otherwise remove it from the node 2185 * table and mark it gone by clearing the back-reference. 2186 */ 2187 static void 2188 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2189 { 2190 2191 IEEE80211_NODE_LOCK_ASSERT(nt); 2192 2193 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2194 "%s: remove %p<%s> from %s table, refcnt %d\n", 2195 __func__, ni, ether_sprintf(ni->ni_macaddr), 2196 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2197 /* 2198 * Clear any entry in the unicast key mapping table. 2199 * We need to do it here so rx lookups don't find it 2200 * in the mapping table even if it's not in the hash 2201 * table. We cannot depend on the mapping table entry 2202 * being cleared because the node may not be free'd. 2203 */ 2204 (void)node_clear_keyixmap(nt, ni); 2205 if (!ieee80211_node_dectestref(ni)) { 2206 /* 2207 * Other references are present, just remove the 2208 * node from the table so it cannot be found. When 2209 * the references are dropped storage will be 2210 * reclaimed. 2211 */ 2212 ieee80211_del_node_nt(nt, ni); 2213 } else 2214 _ieee80211_free_node(ni); 2215 } 2216 2217 /* 2218 * Node table support. 2219 */ 2220 2221 static void 2222 ieee80211_node_table_init(struct ieee80211com *ic, 2223 struct ieee80211_node_table *nt, 2224 const char *name, int inact, int keyixmax) 2225 { 2226 2227 nt->nt_ic = ic; 2228 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2229 TAILQ_INIT(&nt->nt_node); 2230 nt->nt_count = 0; 2231 nt->nt_name = name; 2232 nt->nt_inact_init = inact; 2233 nt->nt_keyixmax = keyixmax; 2234 if (nt->nt_keyixmax > 0) { 2235 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2236 keyixmax * sizeof(struct ieee80211_node *), 2237 M_80211_NODE, 2238 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2239 if (nt->nt_keyixmap == NULL) 2240 ic_printf(ic, 2241 "Cannot allocate key index map with %u entries\n", 2242 keyixmax); 2243 } else 2244 nt->nt_keyixmap = NULL; 2245 } 2246 2247 static void 2248 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2249 struct ieee80211vap *match) 2250 { 2251 struct ieee80211_node *ni, *next; 2252 2253 IEEE80211_NODE_LOCK(nt); 2254 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2255 if (match != NULL && ni->ni_vap != match) 2256 continue; 2257 /* XXX can this happen? if so need's work */ 2258 if (ni->ni_associd != 0) { 2259 struct ieee80211vap *vap = ni->ni_vap; 2260 2261 if (vap->iv_auth->ia_node_leave != NULL) 2262 vap->iv_auth->ia_node_leave(ni); 2263 if (vap->iv_aid_bitmap != NULL) 2264 IEEE80211_AID_CLR(vap, ni->ni_associd); 2265 } 2266 ni->ni_wdsvap = NULL; /* clear reference */ 2267 node_reclaim(nt, ni); 2268 } 2269 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2270 /* 2271 * Make a separate pass to clear references to this vap 2272 * held by DWDS entries. They will not be matched above 2273 * because ni_vap will point to the ap vap but we still 2274 * need to clear ni_wdsvap when the WDS vap is destroyed 2275 * and/or reset. 2276 */ 2277 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2278 if (ni->ni_wdsvap == match) 2279 ni->ni_wdsvap = NULL; 2280 } 2281 IEEE80211_NODE_UNLOCK(nt); 2282 } 2283 2284 static void 2285 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2286 { 2287 ieee80211_node_table_reset(nt, NULL); 2288 if (nt->nt_keyixmap != NULL) { 2289 #ifdef DIAGNOSTIC 2290 /* XXX verify all entries are NULL */ 2291 int i; 2292 for (i = 0; i < nt->nt_keyixmax; i++) 2293 if (nt->nt_keyixmap[i] != NULL) 2294 printf("%s: %s[%u] still active\n", __func__, 2295 nt->nt_name, i); 2296 #endif 2297 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2298 nt->nt_keyixmap = NULL; 2299 } 2300 IEEE80211_NODE_LOCK_DESTROY(nt); 2301 } 2302 2303 static void 2304 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2305 { 2306 struct ieee80211com *ic = ni->ni_ic; 2307 struct ieee80211vap *vap = ni->ni_vap; 2308 2309 /* 2310 * Only process stations when in RUN state. This 2311 * insures, for example, that we don't timeout an 2312 * inactive station during CAC. Note that CSA state 2313 * is actually handled in ieee80211_node_timeout as 2314 * it applies to more than timeout processing. 2315 */ 2316 if (vap->iv_state != IEEE80211_S_RUN) 2317 return; 2318 /* 2319 * Ignore entries for which have yet to receive an 2320 * authentication frame. These are transient and 2321 * will be reclaimed when the last reference to them 2322 * goes away (when frame xmits complete). 2323 */ 2324 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2325 vap->iv_opmode == IEEE80211_M_STA) && 2326 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2327 return; 2328 /* 2329 * Free fragment if not needed anymore 2330 * (last fragment older than 1s). 2331 * XXX doesn't belong here, move to node_age 2332 */ 2333 if (ni->ni_rxfrag[0] != NULL && 2334 ticks > ni->ni_rxfragstamp + hz) { 2335 m_freem(ni->ni_rxfrag[0]); 2336 ni->ni_rxfrag[0] = NULL; 2337 } 2338 if (ni->ni_inact > 0) { 2339 ni->ni_inact--; 2340 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2341 "%s: inact %u inact_reload %u nrates %u", 2342 __func__, ni->ni_inact, ni->ni_inact_reload, 2343 ni->ni_rates.rs_nrates); 2344 } 2345 /* 2346 * Special case ourself; we may be idle for extended periods 2347 * of time and regardless reclaiming our state is wrong. 2348 * XXX run ic_node_age 2349 */ 2350 /* XXX before inact decrement? */ 2351 if (ni == vap->iv_bss) 2352 return; 2353 if (ni->ni_associd != 0 || 2354 (vap->iv_opmode == IEEE80211_M_IBSS || 2355 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2356 /* 2357 * Age/drain resources held by the station. 2358 */ 2359 ic->ic_node_age(ni); 2360 /* 2361 * Probe the station before time it out. We 2362 * send a null data frame which may not be 2363 * universally supported by drivers (need it 2364 * for ps-poll support so it should be...). 2365 * 2366 * XXX don't probe the station unless we've 2367 * received a frame from them (and have 2368 * some idea of the rates they are capable 2369 * of); this will get fixed more properly 2370 * soon with better handling of the rate set. 2371 */ 2372 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2373 (0 < ni->ni_inact && 2374 ni->ni_inact <= vap->iv_inact_probe) && 2375 ni->ni_rates.rs_nrates != 0) { 2376 IEEE80211_NOTE(vap, 2377 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2378 ni, "%s", 2379 "probe station due to inactivity"); 2380 /* 2381 * Grab a reference so the node cannot 2382 * be reclaimed before we send the frame. 2383 * ieee80211_send_nulldata understands 2384 * we've done this and reclaims the 2385 * ref for us as needed. 2386 */ 2387 /* XXX fix this (not required anymore). */ 2388 ieee80211_ref_node(ni); 2389 /* XXX useless */ 2390 ieee80211_send_nulldata(ni); 2391 /* XXX stat? */ 2392 return; 2393 } 2394 } 2395 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2396 ni->ni_inact <= 0) { 2397 IEEE80211_NOTE(vap, 2398 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2399 "station timed out due to inactivity " 2400 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2401 /* 2402 * Send a deauthenticate frame and drop the station. 2403 * This is somewhat complicated due to reference counts 2404 * and locking. At this point a station will typically 2405 * have a reference count of 2. ieee80211_node_leave 2406 * will do a "free" of the node which will drop the 2407 * reference count. But in the meantime a reference 2408 * wil be held by the deauth frame. The actual reclaim 2409 * of the node will happen either after the tx is 2410 * completed or by ieee80211_node_leave. 2411 */ 2412 if (ni->ni_associd != 0) { 2413 IEEE80211_SEND_MGMT(ni, 2414 IEEE80211_FC0_SUBTYPE_DEAUTH, 2415 IEEE80211_REASON_AUTH_EXPIRE); 2416 } 2417 ieee80211_node_leave(ni); 2418 vap->iv_stats.is_node_timeout++; 2419 } 2420 } 2421 2422 /* 2423 * Timeout inactive stations and do related housekeeping. 2424 */ 2425 static void 2426 ieee80211_timeout_stations(struct ieee80211com *ic) 2427 { 2428 struct ieee80211_node_table *nt = &ic->ic_sta; 2429 2430 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2431 } 2432 2433 /* 2434 * Aggressively reclaim resources. This should be used 2435 * only in a critical situation to reclaim mbuf resources. 2436 */ 2437 void 2438 ieee80211_drain(struct ieee80211com *ic) 2439 { 2440 struct ieee80211_node_table *nt = &ic->ic_sta; 2441 struct ieee80211vap *vap; 2442 struct ieee80211_node *ni; 2443 2444 IEEE80211_NODE_LOCK(nt); 2445 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2446 /* 2447 * Ignore entries for which have yet to receive an 2448 * authentication frame. These are transient and 2449 * will be reclaimed when the last reference to them 2450 * goes away (when frame xmits complete). 2451 */ 2452 vap = ni->ni_vap; 2453 /* 2454 * Only process stations when in RUN state. This 2455 * insures, for example, that we don't timeout an 2456 * inactive station during CAC. Note that CSA state 2457 * is actually handled in ieee80211_node_timeout as 2458 * it applies to more than timeout processing. 2459 */ 2460 if (vap->iv_state != IEEE80211_S_RUN) 2461 continue; 2462 /* XXX can vap be NULL? */ 2463 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2464 vap->iv_opmode == IEEE80211_M_STA) && 2465 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2466 continue; 2467 /* 2468 * Free fragments. 2469 * XXX doesn't belong here, move to node_drain 2470 */ 2471 if (ni->ni_rxfrag[0] != NULL) { 2472 m_freem(ni->ni_rxfrag[0]); 2473 ni->ni_rxfrag[0] = NULL; 2474 } 2475 /* 2476 * Drain resources held by the station. 2477 */ 2478 ic->ic_node_drain(ni); 2479 } 2480 IEEE80211_NODE_UNLOCK(nt); 2481 } 2482 2483 /* 2484 * Per-ieee80211com inactivity timer callback. 2485 */ 2486 void 2487 ieee80211_node_timeout(void *arg) 2488 { 2489 struct ieee80211com *ic = arg; 2490 2491 /* 2492 * Defer timeout processing if a channel switch is pending. 2493 * We typically need to be mute so not doing things that 2494 * might generate frames is good to handle in one place. 2495 * Suppressing the station timeout processing may extend the 2496 * lifetime of inactive stations (by not decrementing their 2497 * idle counters) but this should be ok unless the CSA is 2498 * active for an unusually long time. 2499 */ 2500 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2501 ieee80211_scan_timeout(ic); 2502 ieee80211_timeout_stations(ic); 2503 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2504 2505 IEEE80211_LOCK(ic); 2506 ieee80211_erp_timeout(ic); 2507 ieee80211_ht_timeout(ic); 2508 ieee80211_vht_timeout(ic); 2509 IEEE80211_UNLOCK(ic); 2510 } 2511 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2512 ieee80211_node_timeout, ic); 2513 } 2514 2515 /* 2516 * The same as ieee80211_iterate_nodes(), but for one vap only. 2517 */ 2518 int 2519 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2520 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2521 { 2522 struct ieee80211_node **ni_arr; 2523 struct ieee80211_node *ni; 2524 size_t size; 2525 int count, i; 2526 2527 /* 2528 * Iterate over the node table and save an array of ref'ed nodes. 2529 * 2530 * This is separated out from calling the actual node function so that 2531 * no LORs will occur. 2532 */ 2533 IEEE80211_NODE_LOCK(nt); 2534 count = nt->nt_count; 2535 size = count * sizeof(struct ieee80211_node *); 2536 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2537 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2538 if (ni_arr == NULL) { 2539 IEEE80211_NODE_UNLOCK(nt); 2540 return (ENOMEM); 2541 } 2542 2543 i = 0; 2544 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2545 if (vap != NULL && ni->ni_vap != vap) 2546 continue; 2547 KASSERT(i < count, 2548 ("node array overflow (vap %p, i %d, count %d)\n", 2549 vap, i, count)); 2550 ni_arr[i] = ieee80211_ref_node(ni); 2551 i++; 2552 } 2553 IEEE80211_NODE_UNLOCK(nt); 2554 2555 for (i = 0; i < count; i++) { 2556 if (ni_arr[i] == NULL) /* end of the list */ 2557 break; 2558 (*f)(arg, ni_arr[i]); 2559 /* ieee80211_free_node() locks by itself */ 2560 ieee80211_free_node(ni_arr[i]); 2561 } 2562 2563 IEEE80211_FREE(ni_arr, M_80211_NODE); 2564 2565 return (0); 2566 } 2567 2568 /* 2569 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2570 * reference in the source. 2571 */ 2572 void 2573 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2574 ieee80211_iter_func *f, void *arg) 2575 { 2576 /* XXX no way to pass error to the caller. */ 2577 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2578 } 2579 2580 void 2581 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2582 { 2583 printf("0x%p: mac %s refcnt %d\n", ni, 2584 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2585 printf("\tauthmode %u flags 0x%x\n", 2586 ni->ni_authmode, ni->ni_flags); 2587 printf("\tassocid 0x%x txpower %u vlan %u\n", 2588 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2589 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2590 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2591 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2592 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2593 ni->ni_rxfragstamp); 2594 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2595 node_getrssi(ni), ni->ni_noise, 2596 ni->ni_intval, ni->ni_capinfo); 2597 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2598 ether_sprintf(ni->ni_bssid), 2599 ni->ni_esslen, ni->ni_essid, 2600 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2601 printf("\tinact %u inact_reload %u txrate %u\n", 2602 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2603 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2604 ni->ni_htcap, ni->ni_htparam, 2605 ni->ni_htctlchan, ni->ni_ht2ndchan); 2606 printf("\thtopmode %x htstbc %x htchw %u\n", 2607 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2608 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2609 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2610 (int) ni->ni_vht_basicmcs); 2611 /* XXX VHT state */ 2612 } 2613 2614 void 2615 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2616 { 2617 ieee80211_iterate_nodes(nt, 2618 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2619 } 2620 2621 static void 2622 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2623 { 2624 struct ieee80211vap *vap; 2625 2626 IEEE80211_LOCK_ASSERT(ic); 2627 2628 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2629 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2630 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2631 } 2632 2633 void 2634 ieee80211_notify_erp(struct ieee80211com *ic) 2635 { 2636 IEEE80211_LOCK(ic); 2637 ieee80211_notify_erp_locked(ic); 2638 IEEE80211_UNLOCK(ic); 2639 } 2640 2641 /* 2642 * Handle a station joining an 11g network. 2643 */ 2644 static void 2645 ieee80211_node_join_11g(struct ieee80211_node *ni) 2646 { 2647 struct ieee80211com *ic = ni->ni_ic; 2648 2649 IEEE80211_LOCK_ASSERT(ic); 2650 2651 /* 2652 * Station isn't capable of short slot time. Bump 2653 * the count of long slot time stations and disable 2654 * use of short slot time. Note that the actual switch 2655 * over to long slot time use may not occur until the 2656 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2657 */ 2658 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2659 ic->ic_longslotsta++; 2660 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2661 "station needs long slot time, count %d", 2662 ic->ic_longslotsta); 2663 /* XXX vap's w/ conflicting needs won't work */ 2664 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2665 /* 2666 * Don't force slot time when switched to turbo 2667 * mode as non-ERP stations won't be present; this 2668 * need only be done when on the normal G channel. 2669 */ 2670 ieee80211_set_shortslottime(ic, 0); 2671 } 2672 } 2673 /* 2674 * If the new station is not an ERP station 2675 * then bump the counter and enable protection 2676 * if configured. 2677 */ 2678 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2679 ic->ic_nonerpsta++; 2680 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2681 "station is !ERP, %d non-ERP stations associated", 2682 ic->ic_nonerpsta); 2683 /* 2684 * If station does not support short preamble 2685 * then we must enable use of Barker preamble. 2686 */ 2687 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2688 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2689 "%s", "station needs long preamble"); 2690 ic->ic_flags |= IEEE80211_F_USEBARKER; 2691 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2692 } 2693 /* 2694 * If protection is configured and this is the first 2695 * indication we should use protection, enable it. 2696 */ 2697 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2698 ic->ic_nonerpsta == 1 && 2699 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2700 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2701 "%s: enable use of protection\n", __func__); 2702 ic->ic_flags |= IEEE80211_F_USEPROT; 2703 ieee80211_notify_erp_locked(ic); 2704 } 2705 } else 2706 ni->ni_flags |= IEEE80211_NODE_ERP; 2707 } 2708 2709 void 2710 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2711 { 2712 struct ieee80211com *ic = ni->ni_ic; 2713 struct ieee80211vap *vap = ni->ni_vap; 2714 int newassoc; 2715 2716 if (ni->ni_associd == 0) { 2717 uint16_t aid; 2718 2719 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2720 /* 2721 * It would be good to search the bitmap 2722 * more efficiently, but this will do for now. 2723 */ 2724 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2725 if (!IEEE80211_AID_ISSET(vap, aid)) 2726 break; 2727 } 2728 if (aid >= vap->iv_max_aid) { 2729 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2730 ieee80211_node_leave(ni); 2731 return; 2732 } 2733 ni->ni_associd = aid | 0xc000; 2734 ni->ni_jointime = time_uptime; 2735 IEEE80211_LOCK(ic); 2736 IEEE80211_AID_SET(vap, ni->ni_associd); 2737 vap->iv_sta_assoc++; 2738 ic->ic_sta_assoc++; 2739 2740 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2741 ieee80211_ht_node_join(ni); 2742 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2743 ieee80211_vht_node_join(ni); 2744 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2745 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2746 ieee80211_node_join_11g(ni); 2747 IEEE80211_UNLOCK(ic); 2748 2749 newassoc = 1; 2750 } else 2751 newassoc = 0; 2752 2753 /* 2754 * XXX VHT - should log VHT channel width, etc 2755 */ 2756 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2757 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2758 IEEE80211_NODE_AID(ni), 2759 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2760 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2761 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2762 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2763 /* XXX update for VHT string */ 2764 ni->ni_flags & IEEE80211_NODE_HT ? 2765 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2766 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2767 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2768 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2769 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2770 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2771 ", fast-frames" : "", 2772 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2773 ", turbo" : "" 2774 ); 2775 2776 ieee80211_node_setuptxparms(ni); 2777 ieee80211_ratectl_node_init(ni); 2778 /* give driver a chance to setup state like ni_txrate */ 2779 if (ic->ic_newassoc != NULL) 2780 ic->ic_newassoc(ni, newassoc); 2781 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2782 /* tell the authenticator about new station */ 2783 if (vap->iv_auth->ia_node_join != NULL) 2784 vap->iv_auth->ia_node_join(ni); 2785 ieee80211_notify_node_join(ni, 2786 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2787 } 2788 2789 static void 2790 disable_protection(struct ieee80211com *ic) 2791 { 2792 KASSERT(ic->ic_nonerpsta == 0 && 2793 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2794 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2795 ic->ic_flags_ext)); 2796 2797 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2798 /* XXX verify mode? */ 2799 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2800 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2801 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2802 } 2803 ieee80211_notify_erp_locked(ic); 2804 } 2805 2806 /* 2807 * Handle a station leaving an 11g network. 2808 */ 2809 static void 2810 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2811 { 2812 struct ieee80211com *ic = ni->ni_ic; 2813 2814 IEEE80211_LOCK_ASSERT(ic); 2815 2816 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2817 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2818 ic->ic_bsschan->ic_flags)); 2819 2820 /* 2821 * If a long slot station do the slot time bookkeeping. 2822 */ 2823 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2824 KASSERT(ic->ic_longslotsta > 0, 2825 ("bogus long slot station count %d", ic->ic_longslotsta)); 2826 ic->ic_longslotsta--; 2827 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2828 "long slot time station leaves, count now %d", 2829 ic->ic_longslotsta); 2830 if (ic->ic_longslotsta == 0) { 2831 /* 2832 * Re-enable use of short slot time if supported 2833 * and not operating in IBSS mode (per spec). 2834 */ 2835 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2836 ic->ic_opmode != IEEE80211_M_IBSS) { 2837 IEEE80211_DPRINTF(ni->ni_vap, 2838 IEEE80211_MSG_ASSOC, 2839 "%s: re-enable use of short slot time\n", 2840 __func__); 2841 ieee80211_set_shortslottime(ic, 1); 2842 } 2843 } 2844 } 2845 /* 2846 * If a non-ERP station do the protection-related bookkeeping. 2847 */ 2848 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2849 KASSERT(ic->ic_nonerpsta > 0, 2850 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2851 ic->ic_nonerpsta--; 2852 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2853 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2854 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2855 " (non-ERP sta present)" : ""); 2856 if (ic->ic_nonerpsta == 0 && 2857 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2858 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2859 "%s: disable use of protection\n", __func__); 2860 disable_protection(ic); 2861 } 2862 } 2863 } 2864 2865 /* 2866 * Time out presence of an overlapping bss with non-ERP 2867 * stations. When operating in hostap mode we listen for 2868 * beacons from other stations and if we identify a non-ERP 2869 * station is present we enable protection. To identify 2870 * when all non-ERP stations are gone we time out this 2871 * condition. 2872 */ 2873 static void 2874 ieee80211_erp_timeout(struct ieee80211com *ic) 2875 { 2876 2877 IEEE80211_LOCK_ASSERT(ic); 2878 2879 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2880 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2881 #if 0 2882 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2883 "%s", "age out non-ERP sta present on channel"); 2884 #endif 2885 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2886 if (ic->ic_nonerpsta == 0) 2887 disable_protection(ic); 2888 } 2889 } 2890 2891 /* 2892 * Handle bookkeeping for station deauthentication/disassociation 2893 * when operating as an ap. 2894 */ 2895 void 2896 ieee80211_node_leave(struct ieee80211_node *ni) 2897 { 2898 struct ieee80211com *ic = ni->ni_ic; 2899 struct ieee80211vap *vap = ni->ni_vap; 2900 struct ieee80211_node_table *nt = ni->ni_table; 2901 2902 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2903 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2904 2905 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2906 ("unexpected operating mode %u", vap->iv_opmode)); 2907 /* 2908 * If node wasn't previously associated all 2909 * we need to do is reclaim the reference. 2910 */ 2911 /* XXX ibss mode bypasses 11g and notification */ 2912 if (ni->ni_associd == 0) 2913 goto done; 2914 /* 2915 * Tell the authenticator the station is leaving. 2916 * Note that we must do this before yanking the 2917 * association id as the authenticator uses the 2918 * associd to locate it's state block. 2919 */ 2920 if (vap->iv_auth->ia_node_leave != NULL) 2921 vap->iv_auth->ia_node_leave(ni); 2922 2923 IEEE80211_LOCK(ic); 2924 IEEE80211_AID_CLR(vap, ni->ni_associd); 2925 vap->iv_sta_assoc--; 2926 ic->ic_sta_assoc--; 2927 2928 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2929 ieee80211_vht_node_leave(ni); 2930 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2931 ieee80211_ht_node_leave(ni); 2932 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2933 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2934 ieee80211_node_leave_11g(ni); 2935 IEEE80211_UNLOCK(ic); 2936 /* 2937 * Cleanup station state. In particular clear various 2938 * state that might otherwise be reused if the node 2939 * is reused before the reference count goes to zero 2940 * (and memory is reclaimed). 2941 */ 2942 ieee80211_sta_leave(ni); 2943 done: 2944 /* 2945 * Remove the node from any table it's recorded in and 2946 * drop the caller's reference. Removal from the table 2947 * is important to insure the node is not reprocessed 2948 * for inactivity. 2949 */ 2950 if (nt != NULL) { 2951 IEEE80211_NODE_LOCK(nt); 2952 node_reclaim(nt, ni); 2953 IEEE80211_NODE_UNLOCK(nt); 2954 } else 2955 ieee80211_free_node(ni); 2956 } 2957 2958 struct rssiinfo { 2959 int rssi_samples; 2960 uint32_t rssi_total; 2961 }; 2962 2963 static void 2964 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2965 { 2966 struct rssiinfo *info = arg; 2967 struct ieee80211vap *vap = ni->ni_vap; 2968 int8_t rssi; 2969 2970 /* only associated stations */ 2971 if (ni->ni_associd == 0) 2972 return; 2973 rssi = vap->iv_ic->ic_node_getrssi(ni); 2974 if (rssi != 0) { 2975 info->rssi_samples++; 2976 info->rssi_total += rssi; 2977 } 2978 } 2979 2980 static void 2981 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2982 { 2983 struct rssiinfo *info = arg; 2984 struct ieee80211vap *vap = ni->ni_vap; 2985 int8_t rssi; 2986 2987 /* only neighbors */ 2988 /* XXX check bssid */ 2989 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2990 return; 2991 rssi = vap->iv_ic->ic_node_getrssi(ni); 2992 if (rssi != 0) { 2993 info->rssi_samples++; 2994 info->rssi_total += rssi; 2995 } 2996 } 2997 2998 #ifdef IEEE80211_SUPPORT_MESH 2999 static void 3000 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3001 { 3002 struct rssiinfo *info = arg; 3003 struct ieee80211vap *vap = ni->ni_vap; 3004 int8_t rssi; 3005 3006 /* only neighbors that peered successfully */ 3007 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3008 return; 3009 rssi = vap->iv_ic->ic_node_getrssi(ni); 3010 if (rssi != 0) { 3011 info->rssi_samples++; 3012 info->rssi_total += rssi; 3013 } 3014 } 3015 #endif /* IEEE80211_SUPPORT_MESH */ 3016 3017 int8_t 3018 ieee80211_getrssi(struct ieee80211vap *vap) 3019 { 3020 #define NZ(x) ((x) == 0 ? 1 : (x)) 3021 struct ieee80211com *ic = vap->iv_ic; 3022 struct rssiinfo info; 3023 3024 info.rssi_total = 0; 3025 info.rssi_samples = 0; 3026 switch (vap->iv_opmode) { 3027 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3028 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3029 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3030 &info); 3031 break; 3032 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3033 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3034 &info); 3035 break; 3036 #ifdef IEEE80211_SUPPORT_MESH 3037 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3038 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3039 &info); 3040 break; 3041 #endif 3042 case IEEE80211_M_MONITOR: /* XXX */ 3043 case IEEE80211_M_STA: /* use stats from associated ap */ 3044 default: 3045 if (vap->iv_bss != NULL) 3046 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3047 info.rssi_samples = 1; 3048 break; 3049 } 3050 return info.rssi_total / NZ(info.rssi_samples); 3051 #undef NZ 3052 } 3053 3054 void 3055 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3056 { 3057 3058 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3059 return; 3060 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3061 /* for non-station mode return avg'd rssi accounting */ 3062 if (vap->iv_opmode != IEEE80211_M_STA) 3063 *rssi = ieee80211_getrssi(vap); 3064 } 3065