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_cleanup(&ic->ic_stageq); 141 } 142 143 void 144 ieee80211_node_vattach(struct ieee80211vap *vap) 145 { 146 /* NB: driver can override */ 147 vap->iv_max_aid = IEEE80211_AID_DEF; 148 149 /* default station inactivity timer setings */ 150 vap->iv_inact_init = IEEE80211_INACT_INIT; 151 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 152 vap->iv_inact_run = IEEE80211_INACT_RUN; 153 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 154 155 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 156 "%s: init %u auth %u run %u probe %u\n", __func__, 157 vap->iv_inact_init, vap->iv_inact_auth, 158 vap->iv_inact_run, vap->iv_inact_probe); 159 } 160 161 void 162 ieee80211_node_latevattach(struct ieee80211vap *vap) 163 { 164 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 165 /* XXX should we allow max aid to be zero? */ 166 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 167 vap->iv_max_aid = IEEE80211_AID_MIN; 168 if_printf(vap->iv_ifp, 169 "WARNING: max aid too small, changed to %d\n", 170 vap->iv_max_aid); 171 } 172 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 173 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 174 M_80211_NODE, 175 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 176 if (vap->iv_aid_bitmap == NULL) { 177 /* XXX no way to recover */ 178 printf("%s: no memory for AID bitmap, max aid %d!\n", 179 __func__, vap->iv_max_aid); 180 vap->iv_max_aid = 0; 181 } 182 } 183 184 ieee80211_reset_bss(vap); 185 186 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 187 } 188 189 void 190 ieee80211_node_vdetach(struct ieee80211vap *vap) 191 { 192 struct ieee80211com *ic = vap->iv_ic; 193 194 ieee80211_node_table_reset(&ic->ic_sta, vap); 195 if (vap->iv_bss != NULL) { 196 ieee80211_free_node(vap->iv_bss); 197 vap->iv_bss = NULL; 198 } 199 if (vap->iv_aid_bitmap != NULL) { 200 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 201 vap->iv_aid_bitmap = NULL; 202 } 203 } 204 205 /* 206 * Port authorize/unauthorize interfaces for use by an authenticator. 207 */ 208 209 void 210 ieee80211_node_authorize(struct ieee80211_node *ni) 211 { 212 struct ieee80211vap *vap = ni->ni_vap; 213 214 ni->ni_flags |= IEEE80211_NODE_AUTH; 215 ni->ni_inact_reload = vap->iv_inact_run; 216 ni->ni_inact = ni->ni_inact_reload; 217 218 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 219 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 220 } 221 222 void 223 ieee80211_node_unauthorize(struct ieee80211_node *ni) 224 { 225 struct ieee80211vap *vap = ni->ni_vap; 226 227 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 228 ni->ni_inact_reload = vap->iv_inact_auth; 229 if (ni->ni_inact > ni->ni_inact_reload) 230 ni->ni_inact = ni->ni_inact_reload; 231 232 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 233 "%s: inact_reload %u inact %u", __func__, 234 ni->ni_inact_reload, ni->ni_inact); 235 } 236 237 /* 238 * Fix tx parameters for a node according to ``association state''. 239 */ 240 void 241 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 242 { 243 struct ieee80211vap *vap = ni->ni_vap; 244 enum ieee80211_phymode mode; 245 246 if (ni->ni_flags & IEEE80211_NODE_VHT) { 247 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 248 mode = IEEE80211_MODE_VHT_5GHZ; 249 else 250 mode = IEEE80211_MODE_VHT_2GHZ; 251 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 252 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 253 mode = IEEE80211_MODE_11NA; 254 else 255 mode = IEEE80211_MODE_11NG; 256 } else { /* legacy rate handling */ 257 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 258 mode = IEEE80211_MODE_STURBO_A; 259 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 260 mode = IEEE80211_MODE_HALF; 261 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 262 mode = IEEE80211_MODE_QUARTER; 263 /* NB: 108A should be handled as 11a */ 264 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 265 mode = IEEE80211_MODE_11A; 266 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 267 (ni->ni_flags & IEEE80211_NODE_ERP)) 268 mode = IEEE80211_MODE_11G; 269 else 270 mode = IEEE80211_MODE_11B; 271 } 272 ni->ni_txparms = &vap->iv_txparms[mode]; 273 } 274 275 /* 276 * Set/change the channel. The rate set is also updated as 277 * to insure a consistent view by drivers. 278 * XXX should be private but hostap needs it to deal with CSA 279 */ 280 void 281 ieee80211_node_set_chan(struct ieee80211_node *ni, 282 struct ieee80211_channel *chan) 283 { 284 struct ieee80211com *ic = ni->ni_ic; 285 struct ieee80211vap *vap = ni->ni_vap; 286 enum ieee80211_phymode mode; 287 288 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 289 290 ni->ni_chan = chan; 291 mode = ieee80211_chan2mode(chan); 292 if (IEEE80211_IS_CHAN_HT(chan)) { 293 /* 294 * We must install the legacy rate est in ni_rates and the 295 * HT rate set in ni_htrates. 296 */ 297 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 298 /* 299 * Setup bss tx parameters based on operating mode. We 300 * use legacy rates when operating in a mixed HT+non-HT bss 301 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 302 */ 303 if (mode == IEEE80211_MODE_11NA && 304 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 305 mode = IEEE80211_MODE_11A; 306 else if (mode == IEEE80211_MODE_11NG && 307 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 308 mode = IEEE80211_MODE_11G; 309 if (mode == IEEE80211_MODE_11G && 310 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 311 mode = IEEE80211_MODE_11B; 312 } 313 ni->ni_txparms = &vap->iv_txparms[mode]; 314 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 315 } 316 317 static __inline void 318 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 319 { 320 /* propagate useful state */ 321 nbss->ni_authmode = obss->ni_authmode; 322 nbss->ni_txpower = obss->ni_txpower; 323 nbss->ni_vlan = obss->ni_vlan; 324 /* XXX statistics? */ 325 /* XXX legacy WDS bssid? */ 326 } 327 328 void 329 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 330 { 331 struct ieee80211com *ic = vap->iv_ic; 332 struct ieee80211_node *ni; 333 334 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 335 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 336 ieee80211_opmode_name[vap->iv_opmode], 337 ieee80211_chan2ieee(ic, chan), 338 ieee80211_channel_type_char(chan), 339 chan->ic_flags); 340 341 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 342 if (ni == NULL) { 343 /* XXX recovery? */ 344 return; 345 } 346 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 347 ni->ni_esslen = vap->iv_des_ssid[0].len; 348 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 349 if (vap->iv_bss != NULL) 350 copy_bss(ni, vap->iv_bss); 351 ni->ni_intval = ic->ic_bintval; 352 if (vap->iv_flags & IEEE80211_F_PRIVACY) 353 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 354 if (ic->ic_phytype == IEEE80211_T_FH) { 355 ni->ni_fhdwell = 200; /* XXX */ 356 ni->ni_fhindex = 1; 357 } 358 if (vap->iv_opmode == IEEE80211_M_IBSS) { 359 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 360 if (vap->iv_flags & IEEE80211_F_DESBSSID) 361 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 362 else { 363 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 364 /* clear group bit, add local bit */ 365 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 366 } 367 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 368 if (vap->iv_flags & IEEE80211_F_DESBSSID) 369 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 370 else 371 #ifdef IEEE80211_SUPPORT_TDMA 372 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 373 #endif 374 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 375 #ifdef IEEE80211_SUPPORT_MESH 376 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 377 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 378 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 379 #endif 380 } 381 /* 382 * Fix the channel and related attributes. 383 */ 384 /* clear DFS CAC state on previous channel */ 385 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 386 ic->ic_bsschan->ic_freq != chan->ic_freq && 387 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 388 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 389 ic->ic_bsschan = chan; 390 ieee80211_node_set_chan(ni, chan); 391 ic->ic_curmode = ieee80211_chan2mode(chan); 392 /* 393 * Do mode-specific setup. 394 */ 395 if (IEEE80211_IS_CHAN_FULL(chan)) { 396 if (IEEE80211_IS_CHAN_ANYG(chan)) { 397 /* 398 * Use a mixed 11b/11g basic rate set. 399 */ 400 ieee80211_setbasicrates(&ni->ni_rates, 401 IEEE80211_MODE_11G); 402 if (vap->iv_flags & IEEE80211_F_PUREG) { 403 /* 404 * Also mark OFDM rates basic so 11b 405 * stations do not join (WiFi compliance). 406 */ 407 ieee80211_addbasicrates(&ni->ni_rates, 408 IEEE80211_MODE_11A); 409 } 410 } else if (IEEE80211_IS_CHAN_B(chan)) { 411 /* 412 * Force pure 11b rate set. 413 */ 414 ieee80211_setbasicrates(&ni->ni_rates, 415 IEEE80211_MODE_11B); 416 } 417 } 418 419 /* XXX TODO: other bits and pieces - eg fast-frames? */ 420 421 /* If we're an 11n channel then initialise the 11n bits */ 422 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 423 /* XXX what else? */ 424 ieee80211_ht_node_init(ni); 425 ieee80211_vht_node_init(ni); 426 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 427 /* XXX what else? */ 428 ieee80211_ht_node_init(ni); 429 } 430 431 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 432 } 433 434 /* 435 * Reset bss state on transition to the INIT state. 436 * Clear any stations from the table (they have been 437 * deauth'd) and reset the bss node (clears key, rate 438 * etc. state). 439 */ 440 void 441 ieee80211_reset_bss(struct ieee80211vap *vap) 442 { 443 struct ieee80211com *ic = vap->iv_ic; 444 struct ieee80211_node *ni, *obss; 445 446 ieee80211_node_table_reset(&ic->ic_sta, vap); 447 /* XXX multi-bss: wrong */ 448 ieee80211_reset_erp(ic); 449 450 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 451 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 452 obss = vap->iv_bss; 453 vap->iv_bss = ieee80211_ref_node(ni); 454 if (obss != NULL) { 455 copy_bss(ni, obss); 456 ni->ni_intval = ic->ic_bintval; 457 ieee80211_free_node(obss); 458 } else 459 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 460 } 461 462 static int 463 match_ssid(const struct ieee80211_node *ni, 464 int nssid, const struct ieee80211_scan_ssid ssids[]) 465 { 466 int i; 467 468 for (i = 0; i < nssid; i++) { 469 if (ni->ni_esslen == ssids[i].len && 470 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 471 return 1; 472 } 473 return 0; 474 } 475 476 /* 477 * Test a node for suitability/compatibility. 478 */ 479 static int 480 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 481 { 482 struct ieee80211com *ic = ni->ni_ic; 483 uint8_t rate; 484 485 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 486 return 0; 487 if (vap->iv_opmode == IEEE80211_M_IBSS) { 488 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 489 return 0; 490 } else { 491 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 492 return 0; 493 } 494 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 495 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 496 return 0; 497 } else { 498 /* XXX does this mean privacy is supported or required? */ 499 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 500 return 0; 501 } 502 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 503 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 504 if (rate & IEEE80211_RATE_BASIC) 505 return 0; 506 if (vap->iv_des_nssid != 0 && 507 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 508 return 0; 509 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 510 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 511 return 0; 512 return 1; 513 } 514 515 #ifdef IEEE80211_DEBUG 516 /* 517 * Display node suitability/compatibility. 518 */ 519 static void 520 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 521 { 522 struct ieee80211com *ic = ni->ni_ic; 523 uint8_t rate; 524 int fail; 525 526 fail = 0; 527 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 528 fail |= 0x01; 529 if (vap->iv_opmode == IEEE80211_M_IBSS) { 530 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 531 fail |= 0x02; 532 } else { 533 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 534 fail |= 0x02; 535 } 536 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 537 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 538 fail |= 0x04; 539 } else { 540 /* XXX does this mean privacy is supported or required? */ 541 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 542 fail |= 0x04; 543 } 544 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 545 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 546 if (rate & IEEE80211_RATE_BASIC) 547 fail |= 0x08; 548 if (vap->iv_des_nssid != 0 && 549 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 550 fail |= 0x10; 551 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 552 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 553 fail |= 0x20; 554 555 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 556 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 557 printf(" %3d%c", 558 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 559 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 560 fail & 0x08 ? '!' : ' '); 561 printf(" %4s%c", 562 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 563 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 564 "????", 565 fail & 0x02 ? '!' : ' '); 566 printf(" %3s%c ", 567 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 568 fail & 0x04 ? '!' : ' '); 569 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 570 printf("%s\n", fail & 0x10 ? "!" : ""); 571 } 572 #endif /* IEEE80211_DEBUG */ 573 574 575 int 576 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 577 { 578 struct ieee80211vap *vap = ni->ni_vap; 579 580 if (ni == vap->iv_bss || 581 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 582 /* unchanged, nothing to do */ 583 return 0; 584 } 585 586 if (!check_bss(vap, ni)) { 587 /* capabilities mismatch */ 588 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 589 "%s: merge failed, capabilities mismatch\n", __func__); 590 #ifdef IEEE80211_DEBUG 591 if (ieee80211_msg_assoc(vap)) 592 check_bss_debug(vap, ni); 593 #endif 594 vap->iv_stats.is_ibss_capmismatch++; 595 return 0; 596 } 597 598 return 1; 599 } 600 601 /* 602 * Check if the given node should populate the node table. 603 * 604 * We need to be in "see all beacons for all ssids" mode in order 605 * to do IBSS merges, however this means we will populate nodes for 606 * /all/ IBSS SSIDs, versus just the one we care about. 607 * 608 * So this check ensures the node can actually belong to our IBSS 609 * configuration. For now it simply checks the SSID. 610 */ 611 int 612 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 613 const struct ieee80211_scanparams *scan) 614 { 615 struct ieee80211vap *vap = ni->ni_vap; 616 int i; 617 618 /* 619 * If we have no SSID and no scan SSID, return OK. 620 */ 621 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 622 goto ok; 623 624 /* 625 * If we have one of (SSID, scan SSID) then return error. 626 */ 627 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 628 goto mismatch; 629 630 /* 631 * Double-check - we need scan SSID. 632 */ 633 if (scan->ssid == NULL) 634 goto mismatch; 635 636 /* 637 * Check if the scan SSID matches the SSID list for the VAP. 638 */ 639 for (i = 0; i < vap->iv_des_nssid; i++) { 640 641 /* Sanity length check */ 642 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 643 continue; 644 645 /* Note: SSID in the scan entry is the IE format */ 646 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 647 vap->iv_des_ssid[i].len) == 0) 648 goto ok; 649 } 650 651 mismatch: 652 return (0); 653 ok: 654 return (1); 655 } 656 657 /* 658 * Handle 802.11 ad hoc network merge. The 659 * convention, set by the Wireless Ethernet Compatibility Alliance 660 * (WECA), is that an 802.11 station will change its BSSID to match 661 * the "oldest" 802.11 ad hoc network, on the same channel, that 662 * has the station's desired SSID. The "oldest" 802.11 network 663 * sends beacons with the greatest TSF timestamp. 664 * 665 * The caller is assumed to validate TSF's before attempting a merge. 666 * 667 * Return !0 if the BSSID changed, 0 otherwise. 668 */ 669 int 670 ieee80211_ibss_merge(struct ieee80211_node *ni) 671 { 672 #ifdef IEEE80211_DEBUG 673 struct ieee80211vap *vap = ni->ni_vap; 674 struct ieee80211com *ic = ni->ni_ic; 675 #endif 676 677 if (! ieee80211_ibss_merge_check(ni)) 678 return 0; 679 680 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 681 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 682 ether_sprintf(ni->ni_bssid), 683 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 684 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 685 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 686 ); 687 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 688 } 689 690 /* 691 * Calculate HT channel promotion flags for all vaps. 692 * This assumes ni_chan have been setup for each vap. 693 */ 694 static int 695 gethtadjustflags(struct ieee80211com *ic) 696 { 697 struct ieee80211vap *vap; 698 int flags; 699 700 flags = 0; 701 /* XXX locking */ 702 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 703 if (vap->iv_state < IEEE80211_S_RUN) 704 continue; 705 switch (vap->iv_opmode) { 706 case IEEE80211_M_WDS: 707 case IEEE80211_M_STA: 708 case IEEE80211_M_AHDEMO: 709 case IEEE80211_M_HOSTAP: 710 case IEEE80211_M_IBSS: 711 case IEEE80211_M_MBSS: 712 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 713 break; 714 default: 715 break; 716 } 717 } 718 return flags; 719 } 720 721 /* 722 * Calculate VHT channel promotion flags for all vaps. 723 * This assumes ni_chan have been setup for each vap. 724 */ 725 static int 726 getvhtadjustflags(struct ieee80211com *ic) 727 { 728 struct ieee80211vap *vap; 729 int flags; 730 731 flags = 0; 732 /* XXX locking */ 733 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 734 if (vap->iv_state < IEEE80211_S_RUN) 735 continue; 736 switch (vap->iv_opmode) { 737 case IEEE80211_M_WDS: 738 case IEEE80211_M_STA: 739 case IEEE80211_M_AHDEMO: 740 case IEEE80211_M_HOSTAP: 741 case IEEE80211_M_IBSS: 742 case IEEE80211_M_MBSS: 743 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 744 break; 745 default: 746 break; 747 } 748 } 749 return flags; 750 } 751 752 /* 753 * Check if the current channel needs to change based on whether 754 * any vap's are using HT20/HT40. This is used to sync the state 755 * of ic_curchan after a channel width change on a running vap. 756 * 757 * Same applies for VHT. 758 */ 759 void 760 ieee80211_sync_curchan(struct ieee80211com *ic) 761 { 762 struct ieee80211_channel *c; 763 764 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 765 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 766 767 if (c != ic->ic_curchan) { 768 ic->ic_curchan = c; 769 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 770 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 771 IEEE80211_UNLOCK(ic); 772 ic->ic_set_channel(ic); 773 ieee80211_radiotap_chan_change(ic); 774 IEEE80211_LOCK(ic); 775 } 776 } 777 778 /* 779 * Setup the current channel. The request channel may be 780 * promoted if other vap's are operating with HT20/HT40. 781 */ 782 void 783 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 784 { 785 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 786 int flags = gethtadjustflags(ic); 787 /* 788 * Check for channel promotion required to support the 789 * set of running vap's. This assumes we are called 790 * after ni_chan is setup for each vap. 791 */ 792 /* XXX VHT? */ 793 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 794 if (flags > ieee80211_htchanflags(c)) 795 c = ieee80211_ht_adjust_channel(ic, c, flags); 796 } 797 798 /* 799 * VHT promotion - this will at least promote to VHT20/40 800 * based on what HT has done; it may further promote the 801 * channel to VHT80 or above. 802 */ 803 if (ic->ic_vhtcaps != 0) { 804 int flags = getvhtadjustflags(ic); 805 if (flags > ieee80211_vhtchanflags(c)) 806 c = ieee80211_vht_adjust_channel(ic, c, flags); 807 } 808 809 ic->ic_bsschan = ic->ic_curchan = c; 810 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 811 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 812 } 813 814 /* 815 * Change the current channel. The channel change is guaranteed to have 816 * happened before the next state change. 817 */ 818 void 819 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 820 { 821 ieee80211_setupcurchan(ic, c); 822 ieee80211_runtask(ic, &ic->ic_chan_task); 823 } 824 825 void 826 ieee80211_update_chw(struct ieee80211com *ic) 827 { 828 829 ieee80211_setupcurchan(ic, ic->ic_curchan); 830 ieee80211_runtask(ic, &ic->ic_chw_task); 831 } 832 833 /* 834 * Join the specified IBSS/BSS network. The node is assumed to 835 * be passed in with a held reference. 836 */ 837 static int 838 ieee80211_sta_join1(struct ieee80211_node *selbs) 839 { 840 struct ieee80211vap *vap = selbs->ni_vap; 841 struct ieee80211com *ic = selbs->ni_ic; 842 struct ieee80211_node *obss; 843 int canreassoc; 844 845 /* 846 * Committed to selbs, setup state. 847 */ 848 obss = vap->iv_bss; 849 /* 850 * Check if old+new node have the same address in which 851 * case we can reassociate when operating in sta mode. 852 */ 853 canreassoc = (obss != NULL && 854 vap->iv_state == IEEE80211_S_RUN && 855 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 856 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 857 if (obss != NULL) { 858 struct ieee80211_node_table *nt = obss->ni_table; 859 860 copy_bss(selbs, obss); 861 ieee80211_node_decref(obss); /* iv_bss reference */ 862 863 IEEE80211_NODE_LOCK(nt); 864 node_reclaim(nt, obss); /* station table reference */ 865 IEEE80211_NODE_UNLOCK(nt); 866 867 obss = NULL; /* NB: guard against later use */ 868 } 869 870 /* 871 * Delete unusable rates; we've already checked 872 * that the negotiated rate set is acceptable. 873 */ 874 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 875 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 876 877 ieee80211_setcurchan(ic, selbs->ni_chan); 878 /* 879 * Set the erp state (mostly the slot time) to deal with 880 * the auto-select case; this should be redundant if the 881 * mode is locked. 882 */ 883 ieee80211_reset_erp(ic); 884 ieee80211_wme_initparams(vap); 885 886 if (vap->iv_opmode == IEEE80211_M_STA) { 887 if (canreassoc) { 888 /* Reassociate */ 889 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 890 } else { 891 /* 892 * Act as if we received a DEAUTH frame in case we 893 * are invoked from the RUN state. This will cause 894 * us to try to re-authenticate if we are operating 895 * as a station. 896 */ 897 ieee80211_new_state(vap, IEEE80211_S_AUTH, 898 IEEE80211_FC0_SUBTYPE_DEAUTH); 899 } 900 } else 901 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 902 return 1; 903 } 904 905 int 906 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 907 const struct ieee80211_scan_entry *se) 908 { 909 struct ieee80211com *ic = vap->iv_ic; 910 struct ieee80211_node *ni; 911 int do_ht = 0; 912 913 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 914 if (ni == NULL) { 915 /* XXX msg */ 916 return 0; 917 } 918 919 /* 920 * Expand scan state into node's format. 921 * XXX may not need all this stuff 922 */ 923 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 924 ni->ni_esslen = se->se_ssid[1]; 925 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 926 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 927 ni->ni_intval = se->se_intval; 928 ni->ni_capinfo = se->se_capinfo; 929 ni->ni_chan = chan; 930 ni->ni_timoff = se->se_timoff; 931 ni->ni_fhdwell = se->se_fhdwell; 932 ni->ni_fhindex = se->se_fhindex; 933 ni->ni_erp = se->se_erp; 934 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 935 ni->ni_noise = se->se_noise; 936 if (vap->iv_opmode == IEEE80211_M_STA) { 937 /* NB: only infrastructure mode requires an associd */ 938 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 939 } 940 941 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 942 ieee80211_ies_expand(&ni->ni_ies); 943 #ifdef IEEE80211_SUPPORT_SUPERG 944 if (ni->ni_ies.ath_ie != NULL) 945 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 946 #endif 947 if (ni->ni_ies.htcap_ie != NULL) 948 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 949 if (ni->ni_ies.htinfo_ie != NULL) 950 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 951 #ifdef IEEE80211_SUPPORT_MESH 952 if (ni->ni_ies.meshid_ie != NULL) 953 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 954 #endif 955 #ifdef IEEE80211_SUPPORT_TDMA 956 if (ni->ni_ies.tdma_ie != NULL) 957 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 958 #endif 959 if (ni->ni_ies.vhtcap_ie != NULL) 960 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 961 if (ni->ni_ies.vhtopmode_ie != NULL) 962 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 963 964 /* XXX parse BSSLOAD IE */ 965 /* XXX parse TXPWRENV IE */ 966 /* XXX parse APCHANREP IE */ 967 } 968 969 vap->iv_dtim_period = se->se_dtimperiod; 970 vap->iv_dtim_count = 0; 971 972 /* NB: must be after ni_chan is setup */ 973 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 974 IEEE80211_F_DOSORT); 975 if (ieee80211_iserp_rateset(&ni->ni_rates)) 976 ni->ni_flags |= IEEE80211_NODE_ERP; 977 978 /* 979 * Setup HT state for this node if it's available, otherwise 980 * non-STA modes won't pick this state up. 981 * 982 * For IBSS and related modes that don't go through an 983 * association request/response, the only appropriate place 984 * to setup the HT state is here. 985 */ 986 if (ni->ni_ies.htinfo_ie != NULL && 987 ni->ni_ies.htcap_ie != NULL && 988 vap->iv_flags_ht & IEEE80211_FHT_HT) { 989 ieee80211_ht_node_init(ni); 990 ieee80211_ht_updateparams(ni, 991 ni->ni_ies.htcap_ie, 992 ni->ni_ies.htinfo_ie); 993 do_ht = 1; 994 } 995 996 /* 997 * Setup VHT state for this node if it's available. 998 * Same as the above. 999 * 1000 * For now, don't allow 2GHz VHT operation. 1001 */ 1002 if (ni->ni_ies.vhtopmode_ie != NULL && 1003 ni->ni_ies.vhtcap_ie != NULL && 1004 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1005 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1006 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1007 __func__, 1008 ni->ni_macaddr, 1009 ":"); 1010 } else { 1011 ieee80211_vht_node_init(ni); 1012 ieee80211_vht_updateparams(ni, 1013 ni->ni_ies.vhtcap_ie, 1014 ni->ni_ies.vhtopmode_ie); 1015 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1016 ni->ni_ies.vhtopmode_ie); 1017 do_ht = 1; 1018 } 1019 } 1020 1021 /* Finally do the node channel change */ 1022 if (do_ht) { 1023 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1024 ni->ni_ies.htinfo_ie); 1025 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1026 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1027 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1028 } 1029 1030 /* XXX else check for ath FF? */ 1031 /* XXX QoS? Difficult given that WME config is specific to a master */ 1032 1033 ieee80211_node_setuptxparms(ni); 1034 ieee80211_ratectl_node_init(ni); 1035 1036 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1037 } 1038 1039 /* 1040 * Leave the specified IBSS/BSS network. The node is assumed to 1041 * be passed in with a held reference. 1042 */ 1043 void 1044 ieee80211_sta_leave(struct ieee80211_node *ni) 1045 { 1046 struct ieee80211com *ic = ni->ni_ic; 1047 1048 ic->ic_node_cleanup(ni); 1049 ieee80211_notify_node_leave(ni); 1050 } 1051 1052 /* 1053 * Send a deauthenticate frame and drop the station. 1054 */ 1055 void 1056 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1057 { 1058 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1059 ieee80211_ref_node(ni); 1060 if (ni->ni_associd != 0) 1061 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1062 ieee80211_node_leave(ni); 1063 ieee80211_free_node(ni); 1064 } 1065 1066 static struct ieee80211_node * 1067 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1068 { 1069 struct ieee80211_node *ni; 1070 1071 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1072 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1073 return ni; 1074 } 1075 1076 /* 1077 * Initialize an ie blob with the specified data. If previous 1078 * data exists re-use the data block. As a side effect we clear 1079 * all references to specific ie's; the caller is required to 1080 * recalculate them. 1081 */ 1082 int 1083 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1084 { 1085 /* NB: assumes data+len are the last fields */ 1086 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1087 if (ies->data != NULL && ies->len != len) { 1088 /* data size changed */ 1089 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1090 ies->data = NULL; 1091 } 1092 if (ies->data == NULL) { 1093 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1094 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1095 if (ies->data == NULL) { 1096 ies->len = 0; 1097 /* NB: pointers have already been zero'd above */ 1098 return 0; 1099 } 1100 } 1101 memcpy(ies->data, data, len); 1102 ies->len = len; 1103 return 1; 1104 } 1105 1106 /* 1107 * Reclaim storage for an ie blob. 1108 */ 1109 void 1110 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1111 { 1112 if (ies->data != NULL) 1113 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1114 } 1115 1116 /* 1117 * Expand an ie blob data contents and to fillin individual 1118 * ie pointers. The data blob is assumed to be well-formed; 1119 * we don't do any validity checking of ie lengths. 1120 */ 1121 void 1122 ieee80211_ies_expand(struct ieee80211_ies *ies) 1123 { 1124 uint8_t *ie; 1125 int ielen; 1126 1127 ie = ies->data; 1128 ielen = ies->len; 1129 while (ielen > 0) { 1130 switch (ie[0]) { 1131 case IEEE80211_ELEMID_VENDOR: 1132 if (iswpaoui(ie)) 1133 ies->wpa_ie = ie; 1134 else if (iswmeoui(ie)) 1135 ies->wme_ie = ie; 1136 #ifdef IEEE80211_SUPPORT_SUPERG 1137 else if (isatherosoui(ie)) 1138 ies->ath_ie = ie; 1139 #endif 1140 #ifdef IEEE80211_SUPPORT_TDMA 1141 else if (istdmaoui(ie)) 1142 ies->tdma_ie = ie; 1143 #endif 1144 break; 1145 case IEEE80211_ELEMID_RSN: 1146 ies->rsn_ie = ie; 1147 break; 1148 case IEEE80211_ELEMID_HTCAP: 1149 ies->htcap_ie = ie; 1150 break; 1151 case IEEE80211_ELEMID_HTINFO: 1152 ies->htinfo_ie = ie; 1153 break; 1154 #ifdef IEEE80211_SUPPORT_MESH 1155 case IEEE80211_ELEMID_MESHID: 1156 ies->meshid_ie = ie; 1157 break; 1158 #endif 1159 case IEEE80211_ELEMID_VHT_CAP: 1160 ies->vhtcap_ie = ie; 1161 break; 1162 case IEEE80211_ELEMID_VHT_OPMODE: 1163 ies->vhtopmode_ie = ie; 1164 break; 1165 case IEEE80211_ELEMID_VHT_PWR_ENV: 1166 ies->vhtpwrenv_ie = ie; 1167 break; 1168 case IEEE80211_ELEMID_BSSLOAD: 1169 ies->bssload_ie = ie; 1170 break; 1171 case IEEE80211_ELEMID_APCHANREP: 1172 ies->apchanrep_ie = ie; 1173 break; 1174 } 1175 ielen -= 2 + ie[1]; 1176 ie += 2 + ie[1]; 1177 } 1178 } 1179 1180 /* 1181 * Reclaim any resources in a node and reset any critical 1182 * state. Typically nodes are free'd immediately after, 1183 * but in some cases the storage may be reused so we need 1184 * to insure consistent state (should probably fix that). 1185 */ 1186 static void 1187 node_cleanup(struct ieee80211_node *ni) 1188 { 1189 struct ieee80211vap *vap = ni->ni_vap; 1190 struct ieee80211com *ic = ni->ni_ic; 1191 int i; 1192 1193 /* NB: preserve ni_table */ 1194 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1195 if (vap->iv_opmode != IEEE80211_M_STA) 1196 vap->iv_ps_sta--; 1197 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1198 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1199 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1200 } 1201 /* 1202 * Cleanup any VHT and HT-related state. 1203 */ 1204 if (ni->ni_flags & IEEE80211_NODE_VHT) 1205 ieee80211_vht_node_cleanup(ni); 1206 if (ni->ni_flags & IEEE80211_NODE_HT) 1207 ieee80211_ht_node_cleanup(ni); 1208 #ifdef IEEE80211_SUPPORT_SUPERG 1209 /* Always do FF node cleanup; for A-MSDU */ 1210 ieee80211_ff_node_cleanup(ni); 1211 #endif 1212 #ifdef IEEE80211_SUPPORT_MESH 1213 /* 1214 * Cleanup any mesh-related state. 1215 */ 1216 if (vap->iv_opmode == IEEE80211_M_MBSS) 1217 ieee80211_mesh_node_cleanup(ni); 1218 #endif 1219 /* 1220 * Clear any staging queue entries. 1221 */ 1222 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1223 1224 /* 1225 * Clear AREF flag that marks the authorization refcnt bump 1226 * has happened. This is probably not needed as the node 1227 * should always be removed from the table so not found but 1228 * do it just in case. 1229 * Likewise clear the ASSOCID flag as these flags are intended 1230 * to be managed in tandem. 1231 */ 1232 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1233 1234 /* 1235 * Drain power save queue and, if needed, clear TIM. 1236 */ 1237 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1238 vap->iv_set_tim(ni, 0); 1239 1240 ni->ni_associd = 0; 1241 if (ni->ni_challenge != NULL) { 1242 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1243 ni->ni_challenge = NULL; 1244 } 1245 /* 1246 * Preserve SSID, WPA, and WME ie's so the bss node is 1247 * reusable during a re-auth/re-assoc state transition. 1248 * If we remove these data they will not be recreated 1249 * because they come from a probe-response or beacon frame 1250 * which cannot be expected prior to the association-response. 1251 * This should not be an issue when operating in other modes 1252 * as stations leaving always go through a full state transition 1253 * which will rebuild this state. 1254 * 1255 * XXX does this leave us open to inheriting old state? 1256 */ 1257 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1258 if (ni->ni_rxfrag[i] != NULL) { 1259 m_freem(ni->ni_rxfrag[i]); 1260 ni->ni_rxfrag[i] = NULL; 1261 } 1262 /* 1263 * Must be careful here to remove any key map entry w/o a LOR. 1264 */ 1265 ieee80211_node_delucastkey(ni); 1266 } 1267 1268 static void 1269 node_free(struct ieee80211_node *ni) 1270 { 1271 struct ieee80211com *ic = ni->ni_ic; 1272 1273 ieee80211_ratectl_node_deinit(ni); 1274 ic->ic_node_cleanup(ni); 1275 ieee80211_ies_cleanup(&ni->ni_ies); 1276 ieee80211_psq_cleanup(&ni->ni_psq); 1277 IEEE80211_FREE(ni, M_80211_NODE); 1278 } 1279 1280 static void 1281 node_age(struct ieee80211_node *ni) 1282 { 1283 struct ieee80211vap *vap = ni->ni_vap; 1284 1285 /* 1286 * Age frames on the power save queue. 1287 */ 1288 if (ieee80211_node_psq_age(ni) != 0 && 1289 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1290 vap->iv_set_tim(ni, 0); 1291 /* 1292 * Age out HT resources (e.g. frames on the 1293 * A-MPDU reorder queues). 1294 */ 1295 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1296 ieee80211_ht_node_age(ni); 1297 } 1298 1299 static int8_t 1300 node_getrssi(const struct ieee80211_node *ni) 1301 { 1302 uint32_t avgrssi = ni->ni_avgrssi; 1303 int32_t rssi; 1304 1305 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1306 return 0; 1307 rssi = IEEE80211_RSSI_GET(avgrssi); 1308 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1309 } 1310 1311 static void 1312 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1313 { 1314 *rssi = node_getrssi(ni); 1315 *noise = ni->ni_noise; 1316 } 1317 1318 static void 1319 node_getmimoinfo(const struct ieee80211_node *ni, 1320 struct ieee80211_mimo_info *info) 1321 { 1322 int i; 1323 uint32_t avgrssi; 1324 int32_t rssi; 1325 1326 bzero(info, sizeof(*info)); 1327 1328 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1329 /* Note: for now, just pri20 channel info */ 1330 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1331 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1332 info->ch[i].rssi[0] = 0; 1333 } else { 1334 rssi = IEEE80211_RSSI_GET(avgrssi); 1335 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1336 } 1337 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1338 } 1339 1340 /* XXX ext radios? */ 1341 1342 /* XXX EVM? */ 1343 } 1344 1345 static void 1346 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1347 struct ieee80211_node *ni) 1348 { 1349 struct ieee80211com *ic = nt->nt_ic; 1350 int hash; 1351 1352 IEEE80211_NODE_LOCK_ASSERT(nt); 1353 1354 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1355 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1356 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1357 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1358 nt->nt_count++; 1359 ni->ni_table = nt; 1360 } 1361 1362 static void 1363 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1364 struct ieee80211_node *ni) 1365 { 1366 1367 IEEE80211_NODE_LOCK_ASSERT(nt); 1368 1369 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1370 LIST_REMOVE(ni, ni_hash); 1371 nt->nt_count--; 1372 KASSERT(nt->nt_count >= 0, 1373 ("nt_count is negative (%d)!\n", nt->nt_count)); 1374 ni->ni_table = NULL; 1375 } 1376 1377 struct ieee80211_node * 1378 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1379 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1380 { 1381 struct ieee80211com *ic = nt->nt_ic; 1382 struct ieee80211_node *ni; 1383 1384 ni = ic->ic_node_alloc(vap, macaddr); 1385 if (ni == NULL) { 1386 vap->iv_stats.is_rx_nodealloc++; 1387 return NULL; 1388 } 1389 1390 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1391 "%s %p<%s> in %s table\n", __func__, ni, 1392 ether_sprintf(macaddr), nt->nt_name); 1393 1394 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1395 ieee80211_node_initref(ni); /* mark referenced */ 1396 ni->ni_chan = IEEE80211_CHAN_ANYC; 1397 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1398 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1399 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1400 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1401 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1402 ni->ni_inact_reload = nt->nt_inact_init; 1403 ni->ni_inact = ni->ni_inact_reload; 1404 ni->ni_ath_defkeyix = 0x7fff; 1405 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1406 #ifdef IEEE80211_SUPPORT_MESH 1407 if (vap->iv_opmode == IEEE80211_M_MBSS) 1408 ieee80211_mesh_node_init(vap, ni); 1409 #endif 1410 IEEE80211_NODE_LOCK(nt); 1411 ieee80211_add_node_nt(nt, ni); 1412 ni->ni_vap = vap; 1413 ni->ni_ic = ic; 1414 IEEE80211_NODE_UNLOCK(nt); 1415 1416 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1417 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1418 1419 ieee80211_ratectl_node_init(ni); 1420 1421 return ni; 1422 } 1423 1424 /* 1425 * Craft a temporary node suitable for sending a management frame 1426 * to the specified station. We craft only as much state as we 1427 * need to do the work since the node will be immediately reclaimed 1428 * once the send completes. 1429 */ 1430 struct ieee80211_node * 1431 ieee80211_tmp_node(struct ieee80211vap *vap, 1432 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1433 { 1434 struct ieee80211com *ic = vap->iv_ic; 1435 struct ieee80211_node *ni; 1436 1437 ni = ic->ic_node_alloc(vap, macaddr); 1438 if (ni != NULL) { 1439 struct ieee80211_node *bss = vap->iv_bss; 1440 1441 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1442 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1443 1444 ni->ni_table = NULL; /* NB: pedantic */ 1445 ni->ni_ic = ic; /* NB: needed to set channel */ 1446 ni->ni_vap = vap; 1447 1448 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1449 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1450 ieee80211_node_initref(ni); /* mark referenced */ 1451 /* NB: required by ieee80211_fix_rate */ 1452 ieee80211_node_set_chan(ni, bss->ni_chan); 1453 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1454 IEEE80211_KEYIX_NONE); 1455 ni->ni_txpower = bss->ni_txpower; 1456 /* XXX optimize away */ 1457 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1458 1459 ieee80211_ratectl_node_init(ni); 1460 } else { 1461 /* XXX msg */ 1462 vap->iv_stats.is_rx_nodealloc++; 1463 } 1464 return ni; 1465 } 1466 1467 struct ieee80211_node * 1468 ieee80211_dup_bss(struct ieee80211vap *vap, 1469 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1470 { 1471 struct ieee80211com *ic = vap->iv_ic; 1472 struct ieee80211_node *ni; 1473 1474 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1475 if (ni != NULL) { 1476 struct ieee80211_node *bss = vap->iv_bss; 1477 /* 1478 * Inherit from iv_bss. 1479 */ 1480 copy_bss(ni, bss); 1481 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1482 ieee80211_node_set_chan(ni, bss->ni_chan); 1483 } 1484 return ni; 1485 } 1486 1487 /* 1488 * Create a bss node for a legacy WDS vap. The far end does 1489 * not associate so we just create create a new node and 1490 * simulate an association. The caller is responsible for 1491 * installing the node as the bss node and handling any further 1492 * setup work like authorizing the port. 1493 */ 1494 struct ieee80211_node * 1495 ieee80211_node_create_wds(struct ieee80211vap *vap, 1496 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1497 { 1498 struct ieee80211com *ic = vap->iv_ic; 1499 struct ieee80211_node *ni; 1500 1501 /* XXX check if node already in sta table? */ 1502 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1503 if (ni != NULL) { 1504 ni->ni_wdsvap = vap; 1505 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1506 /* 1507 * Inherit any manually configured settings. 1508 */ 1509 copy_bss(ni, vap->iv_bss); 1510 ieee80211_node_set_chan(ni, chan); 1511 /* NB: propagate ssid so available to WPA supplicant */ 1512 ni->ni_esslen = vap->iv_des_ssid[0].len; 1513 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1514 /* NB: no associd for peer */ 1515 /* 1516 * There are no management frames to use to 1517 * discover neighbor capabilities, so blindly 1518 * propagate the local configuration. 1519 */ 1520 if (vap->iv_flags & IEEE80211_F_WME) 1521 ni->ni_flags |= IEEE80211_NODE_QOS; 1522 #ifdef IEEE80211_SUPPORT_SUPERG 1523 if (vap->iv_flags & IEEE80211_F_FF) 1524 ni->ni_flags |= IEEE80211_NODE_FF; 1525 #endif 1526 /* XXX VHT */ 1527 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1528 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1529 /* 1530 * Device is HT-capable and HT is enabled for 1531 * the vap; setup HT operation. On return 1532 * ni_chan will be adjusted to an HT channel. 1533 */ 1534 ieee80211_ht_wds_init(ni); 1535 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1536 printf("%s: TODO: vht_wds_init\n", __func__); 1537 } 1538 } else { 1539 struct ieee80211_channel *c = ni->ni_chan; 1540 /* 1541 * Force a legacy channel to be used. 1542 */ 1543 c = ieee80211_find_channel(ic, 1544 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1545 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1546 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1547 ni->ni_chan = c; 1548 } 1549 } 1550 return ni; 1551 } 1552 1553 struct ieee80211_node * 1554 #ifdef IEEE80211_DEBUG_REFCNT 1555 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1556 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1557 #else 1558 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1559 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1560 #endif 1561 { 1562 struct ieee80211_node *ni; 1563 int hash; 1564 1565 IEEE80211_NODE_LOCK_ASSERT(nt); 1566 1567 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1568 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1569 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1570 ieee80211_ref_node(ni); /* mark referenced */ 1571 #ifdef IEEE80211_DEBUG_REFCNT 1572 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1573 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1574 func, line, 1575 ni, ether_sprintf(ni->ni_macaddr), 1576 ieee80211_node_refcnt(ni)); 1577 #endif 1578 return ni; 1579 } 1580 } 1581 return NULL; 1582 } 1583 1584 struct ieee80211_node * 1585 #ifdef IEEE80211_DEBUG_REFCNT 1586 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1587 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1588 #else 1589 ieee80211_find_node(struct ieee80211_node_table *nt, 1590 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1591 #endif 1592 { 1593 struct ieee80211_node *ni; 1594 1595 IEEE80211_NODE_LOCK(nt); 1596 ni = ieee80211_find_node_locked(nt, macaddr); 1597 IEEE80211_NODE_UNLOCK(nt); 1598 return ni; 1599 } 1600 1601 struct ieee80211_node * 1602 #ifdef IEEE80211_DEBUG_REFCNT 1603 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1604 const struct ieee80211vap *vap, 1605 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1606 #else 1607 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1608 const struct ieee80211vap *vap, 1609 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1610 #endif 1611 { 1612 struct ieee80211_node *ni; 1613 int hash; 1614 1615 IEEE80211_NODE_LOCK_ASSERT(nt); 1616 1617 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1618 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1619 if (ni->ni_vap == vap && 1620 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1621 ieee80211_ref_node(ni); /* mark referenced */ 1622 #ifdef IEEE80211_DEBUG_REFCNT 1623 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1624 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1625 func, line, 1626 ni, ether_sprintf(ni->ni_macaddr), 1627 ieee80211_node_refcnt(ni)); 1628 #endif 1629 return ni; 1630 } 1631 } 1632 return NULL; 1633 } 1634 1635 struct ieee80211_node * 1636 #ifdef IEEE80211_DEBUG_REFCNT 1637 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1638 const struct ieee80211vap *vap, 1639 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1640 #else 1641 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1642 const struct ieee80211vap *vap, 1643 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1644 #endif 1645 { 1646 struct ieee80211_node *ni; 1647 1648 IEEE80211_NODE_LOCK(nt); 1649 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1650 IEEE80211_NODE_UNLOCK(nt); 1651 return ni; 1652 } 1653 1654 /* 1655 * Fake up a node; this handles node discovery in adhoc mode. 1656 * Note that for the driver's benefit we we treat this like 1657 * an association so the driver has an opportunity to setup 1658 * it's private state. 1659 */ 1660 struct ieee80211_node * 1661 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1662 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1663 { 1664 struct ieee80211_node *ni; 1665 1666 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1667 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1668 ni = ieee80211_dup_bss(vap, macaddr); 1669 if (ni != NULL) { 1670 struct ieee80211com *ic = vap->iv_ic; 1671 1672 /* XXX no rate negotiation; just dup */ 1673 ni->ni_rates = vap->iv_bss->ni_rates; 1674 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1675 ni->ni_flags |= IEEE80211_NODE_ERP; 1676 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1677 /* 1678 * In adhoc demo mode there are no management 1679 * frames to use to discover neighbor capabilities, 1680 * so blindly propagate the local configuration 1681 * so we can do interesting things (e.g. use 1682 * WME to disable ACK's). 1683 */ 1684 /* 1685 * XXX TODO: 11n? 1686 */ 1687 if (vap->iv_flags & IEEE80211_F_WME) 1688 ni->ni_flags |= IEEE80211_NODE_QOS; 1689 #ifdef IEEE80211_SUPPORT_SUPERG 1690 if (vap->iv_flags & IEEE80211_F_FF) 1691 ni->ni_flags |= IEEE80211_NODE_FF; 1692 #endif 1693 } 1694 ieee80211_node_setuptxparms(ni); 1695 ieee80211_ratectl_node_init(ni); 1696 1697 /* 1698 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1699 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1700 * that after we hear that we can indeed do 11n 1701 * (either by a beacon frame or by a probe response.) 1702 */ 1703 1704 /* 1705 * This is the first time we see the node. 1706 */ 1707 if (ic->ic_newassoc != NULL) 1708 ic->ic_newassoc(ni, 1); 1709 1710 /* 1711 * Kick off a probe request to the given node; 1712 * we will then use the probe response to update 1713 * 11n/etc configuration state. 1714 * 1715 * XXX TODO: this isn't guaranteed, and until we get 1716 * a probe response, we won't be able to actually 1717 * do anything 802.11n related to the node. 1718 * So if this does indeed work, maybe we should hold 1719 * off on sending responses until we get the probe 1720 * response, or just default to some sensible subset 1721 * of 802.11n behaviour (eg always allow aggregation 1722 * negotiation TO us, but not FROM us, etc) so we 1723 * aren't entirely busted. 1724 */ 1725 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1726 ieee80211_send_probereq(ni, /* node */ 1727 vap->iv_myaddr, /* SA */ 1728 ni->ni_macaddr, /* DA */ 1729 vap->iv_bss->ni_bssid, /* BSSID */ 1730 vap->iv_bss->ni_essid, 1731 vap->iv_bss->ni_esslen); /* SSID */ 1732 } 1733 1734 /* XXX not right for 802.1x/WPA */ 1735 ieee80211_node_authorize(ni); 1736 } 1737 return ni; 1738 } 1739 1740 void 1741 ieee80211_init_neighbor(struct ieee80211_node *ni, 1742 const struct ieee80211_frame *wh, 1743 const struct ieee80211_scanparams *sp) 1744 { 1745 int do_ht_setup = 0, do_vht_setup = 0; 1746 1747 ni->ni_esslen = sp->ssid[1]; 1748 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1749 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1750 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1751 ni->ni_intval = sp->bintval; 1752 ni->ni_capinfo = sp->capinfo; 1753 ni->ni_chan = ni->ni_ic->ic_curchan; 1754 ni->ni_fhdwell = sp->fhdwell; 1755 ni->ni_fhindex = sp->fhindex; 1756 ni->ni_erp = sp->erp; 1757 ni->ni_timoff = sp->timoff; 1758 #ifdef IEEE80211_SUPPORT_MESH 1759 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1760 ieee80211_mesh_init_neighbor(ni, wh, sp); 1761 #endif 1762 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1763 ieee80211_ies_expand(&ni->ni_ies); 1764 if (ni->ni_ies.wme_ie != NULL) 1765 ni->ni_flags |= IEEE80211_NODE_QOS; 1766 else 1767 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1768 #ifdef IEEE80211_SUPPORT_SUPERG 1769 if (ni->ni_ies.ath_ie != NULL) 1770 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1771 #endif 1772 if (ni->ni_ies.htcap_ie != NULL) 1773 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1774 if (ni->ni_ies.htinfo_ie != NULL) 1775 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1776 1777 if (ni->ni_ies.vhtcap_ie != NULL) 1778 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1779 if (ni->ni_ies.vhtopmode_ie != NULL) 1780 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1781 1782 if ((ni->ni_ies.htcap_ie != NULL) && 1783 (ni->ni_ies.htinfo_ie != NULL) && 1784 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1785 do_ht_setup = 1; 1786 } 1787 1788 if ((ni->ni_ies.vhtcap_ie != NULL) && 1789 (ni->ni_ies.vhtopmode_ie != NULL) && 1790 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1791 do_vht_setup = 1; 1792 } 1793 1794 } 1795 1796 /* NB: must be after ni_chan is setup */ 1797 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1798 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1799 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1800 1801 /* 1802 * If the neighbor is HT compatible, flip that on. 1803 */ 1804 if (do_ht_setup) { 1805 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1806 "%s: doing HT setup\n", __func__); 1807 ieee80211_ht_node_init(ni); 1808 ieee80211_ht_updateparams(ni, 1809 ni->ni_ies.htcap_ie, 1810 ni->ni_ies.htinfo_ie); 1811 1812 if (do_vht_setup) { 1813 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1814 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1815 __func__, 1816 ni->ni_macaddr, 1817 ":"); 1818 } else { 1819 ieee80211_vht_node_init(ni); 1820 ieee80211_vht_updateparams(ni, 1821 ni->ni_ies.vhtcap_ie, 1822 ni->ni_ies.vhtopmode_ie); 1823 ieee80211_setup_vht_rates(ni, 1824 ni->ni_ies.vhtcap_ie, 1825 ni->ni_ies.vhtopmode_ie); 1826 } 1827 } 1828 1829 /* 1830 * Finally do the channel upgrade/change based 1831 * on the HT/VHT configuration. 1832 */ 1833 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1834 ni->ni_ies.htinfo_ie); 1835 ieee80211_setup_htrates(ni, 1836 ni->ni_ies.htcap_ie, 1837 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1838 ieee80211_setup_basic_htrates(ni, 1839 ni->ni_ies.htinfo_ie); 1840 1841 ieee80211_node_setuptxparms(ni); 1842 ieee80211_ratectl_node_init(ni); 1843 1844 /* Reassociate; we're now 11n/11ac */ 1845 /* 1846 * XXX TODO: this is the wrong thing to do - 1847 * we're calling it with isnew=1 so the ath(4) 1848 * driver reinitialises the rate tables. 1849 * This "mostly" works for ath(4), but it won't 1850 * be right for firmware devices which allocate 1851 * node states. 1852 * 1853 * So, do we just create a new node and delete 1854 * the old one? Or? 1855 */ 1856 if (ni->ni_ic->ic_newassoc) 1857 ni->ni_ic->ic_newassoc(ni, 1); 1858 } 1859 } 1860 1861 /* 1862 * Do node discovery in adhoc mode on receipt of a beacon 1863 * or probe response frame. Note that for the driver's 1864 * benefit we we treat this like an association so the 1865 * driver has an opportunity to setup it's private state. 1866 */ 1867 struct ieee80211_node * 1868 ieee80211_add_neighbor(struct ieee80211vap *vap, 1869 const struct ieee80211_frame *wh, 1870 const struct ieee80211_scanparams *sp) 1871 { 1872 struct ieee80211_node *ni; 1873 1874 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1875 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1876 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1877 if (ni != NULL) { 1878 struct ieee80211com *ic = vap->iv_ic; 1879 1880 ieee80211_init_neighbor(ni, wh, sp); 1881 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1882 ni->ni_flags |= IEEE80211_NODE_ERP; 1883 ieee80211_node_setuptxparms(ni); 1884 ieee80211_ratectl_node_init(ni); 1885 if (ic->ic_newassoc != NULL) 1886 ic->ic_newassoc(ni, 1); 1887 /* XXX not right for 802.1x/WPA */ 1888 ieee80211_node_authorize(ni); 1889 } 1890 return ni; 1891 } 1892 1893 #define IS_PROBEREQ(wh) \ 1894 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1895 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1896 #define IS_BCAST_PROBEREQ(wh) \ 1897 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1898 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1899 1900 static __inline struct ieee80211_node * 1901 _find_rxnode(struct ieee80211_node_table *nt, 1902 const struct ieee80211_frame_min *wh) 1903 { 1904 if (IS_BCAST_PROBEREQ(wh)) 1905 return NULL; /* spam bcast probe req to all vap's */ 1906 return ieee80211_find_node_locked(nt, wh->i_addr2); 1907 } 1908 1909 /* 1910 * Locate the node for sender, track state, and then pass the 1911 * (referenced) node up to the 802.11 layer for its use. Note 1912 * we can return NULL if the sender is not in the table. 1913 */ 1914 struct ieee80211_node * 1915 #ifdef IEEE80211_DEBUG_REFCNT 1916 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1917 const struct ieee80211_frame_min *wh, const char *func, int line) 1918 #else 1919 ieee80211_find_rxnode(struct ieee80211com *ic, 1920 const struct ieee80211_frame_min *wh) 1921 #endif 1922 { 1923 struct ieee80211_node_table *nt; 1924 struct ieee80211_node *ni; 1925 1926 nt = &ic->ic_sta; 1927 IEEE80211_NODE_LOCK(nt); 1928 ni = _find_rxnode(nt, wh); 1929 IEEE80211_NODE_UNLOCK(nt); 1930 1931 return ni; 1932 } 1933 1934 /* 1935 * Like ieee80211_find_rxnode but use the supplied h/w 1936 * key index as a hint to locate the node in the key 1937 * mapping table. If an entry is present at the key 1938 * index we return it; otherwise do a normal lookup and 1939 * update the mapping table if the station has a unicast 1940 * key assigned to it. 1941 */ 1942 struct ieee80211_node * 1943 #ifdef IEEE80211_DEBUG_REFCNT 1944 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1945 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1946 const char *func, int line) 1947 #else 1948 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1949 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1950 #endif 1951 { 1952 struct ieee80211_node_table *nt; 1953 struct ieee80211_node *ni; 1954 1955 nt = &ic->ic_sta; 1956 IEEE80211_NODE_LOCK(nt); 1957 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1958 ni = nt->nt_keyixmap[keyix]; 1959 else 1960 ni = NULL; 1961 if (ni == NULL) { 1962 ni = _find_rxnode(nt, wh); 1963 if (ni != NULL && nt->nt_keyixmap != NULL) { 1964 /* 1965 * If the station has a unicast key cache slot 1966 * assigned update the key->node mapping table. 1967 */ 1968 keyix = ni->ni_ucastkey.wk_rxkeyix; 1969 /* XXX can keyixmap[keyix] != NULL? */ 1970 if (keyix < nt->nt_keyixmax && 1971 nt->nt_keyixmap[keyix] == NULL) { 1972 IEEE80211_DPRINTF(ni->ni_vap, 1973 IEEE80211_MSG_NODE, 1974 "%s: add key map entry %p<%s> refcnt %d\n", 1975 __func__, ni, ether_sprintf(ni->ni_macaddr), 1976 ieee80211_node_refcnt(ni)+1); 1977 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1978 } 1979 } 1980 } else { 1981 if (IS_BCAST_PROBEREQ(wh)) 1982 ni = NULL; /* spam bcast probe req to all vap's */ 1983 else 1984 ieee80211_ref_node(ni); 1985 } 1986 IEEE80211_NODE_UNLOCK(nt); 1987 1988 return ni; 1989 } 1990 #undef IS_BCAST_PROBEREQ 1991 #undef IS_PROBEREQ 1992 1993 /* 1994 * Return a reference to the appropriate node for sending 1995 * a data frame. This handles node discovery in adhoc networks. 1996 */ 1997 struct ieee80211_node * 1998 #ifdef IEEE80211_DEBUG_REFCNT 1999 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 2000 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2001 const char *func, int line) 2002 #else 2003 ieee80211_find_txnode(struct ieee80211vap *vap, 2004 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 2005 #endif 2006 { 2007 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2008 struct ieee80211_node *ni; 2009 2010 /* 2011 * The destination address should be in the node table 2012 * unless this is a multicast/broadcast frame. We can 2013 * also optimize station mode operation, all frames go 2014 * to the bss node. 2015 */ 2016 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2017 IEEE80211_NODE_LOCK(nt); 2018 if (vap->iv_opmode == IEEE80211_M_STA || 2019 vap->iv_opmode == IEEE80211_M_WDS || 2020 IEEE80211_IS_MULTICAST(macaddr)) 2021 ni = ieee80211_ref_node(vap->iv_bss); 2022 else 2023 ni = ieee80211_find_node_locked(nt, macaddr); 2024 IEEE80211_NODE_UNLOCK(nt); 2025 2026 if (ni == NULL) { 2027 if (vap->iv_opmode == IEEE80211_M_IBSS || 2028 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2029 /* 2030 * In adhoc mode cons up a node for the destination. 2031 * Note that we need an additional reference for the 2032 * caller to be consistent with 2033 * ieee80211_find_node_locked. 2034 */ 2035 /* 2036 * XXX TODO: this doesn't fake up 11n state; we need 2037 * to find another way to get it upgraded. 2038 */ 2039 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2040 if (ni != NULL) 2041 (void) ieee80211_ref_node(ni); 2042 } else { 2043 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2044 "no node, discard frame (%s)", __func__); 2045 vap->iv_stats.is_tx_nonode++; 2046 } 2047 } 2048 return ni; 2049 } 2050 2051 static void 2052 _ieee80211_free_node(struct ieee80211_node *ni) 2053 { 2054 struct ieee80211_node_table *nt = ni->ni_table; 2055 2056 /* 2057 * NB: careful about referencing the vap as it may be 2058 * gone if the last reference was held by a driver. 2059 * We know the com will always be present so it's safe 2060 * to use ni_ic below to reclaim resources. 2061 */ 2062 #if 0 2063 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2064 "%s %p<%s> in %s table\n", __func__, ni, 2065 ether_sprintf(ni->ni_macaddr), 2066 nt != NULL ? nt->nt_name : "<gone>"); 2067 #endif 2068 if (ni->ni_associd != 0) { 2069 struct ieee80211vap *vap = ni->ni_vap; 2070 if (vap->iv_aid_bitmap != NULL) 2071 IEEE80211_AID_CLR(vap, ni->ni_associd); 2072 } 2073 if (nt != NULL) 2074 ieee80211_del_node_nt(nt, ni); 2075 ni->ni_ic->ic_node_free(ni); 2076 } 2077 2078 /* 2079 * Clear any entry in the unicast key mapping table. 2080 */ 2081 static int 2082 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2083 { 2084 ieee80211_keyix keyix; 2085 2086 keyix = ni->ni_ucastkey.wk_rxkeyix; 2087 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2088 nt->nt_keyixmap[keyix] == ni) { 2089 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2090 "%s: %p<%s> clear key map entry %u\n", 2091 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2092 nt->nt_keyixmap[keyix] = NULL; 2093 ieee80211_node_decref(ni); 2094 return 1; 2095 } 2096 2097 return 0; 2098 } 2099 2100 void 2101 #ifdef IEEE80211_DEBUG_REFCNT 2102 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 2103 #else 2104 ieee80211_free_node(struct ieee80211_node *ni) 2105 #endif 2106 { 2107 struct ieee80211_node_table *nt = ni->ni_table; 2108 2109 #ifdef IEEE80211_DEBUG_REFCNT 2110 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2111 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2112 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2113 #endif 2114 if (nt != NULL) { 2115 IEEE80211_NODE_LOCK(nt); 2116 if (ieee80211_node_dectestref(ni)) { 2117 /* 2118 * Last reference, reclaim state. 2119 */ 2120 _ieee80211_free_node(ni); 2121 } else if (ieee80211_node_refcnt(ni) == 1) 2122 if (node_clear_keyixmap(nt, ni)) 2123 _ieee80211_free_node(ni); 2124 IEEE80211_NODE_UNLOCK(nt); 2125 } else { 2126 if (ieee80211_node_dectestref(ni)) 2127 _ieee80211_free_node(ni); 2128 } 2129 } 2130 2131 /* 2132 * Reclaim a unicast key and clear any key cache state. 2133 */ 2134 int 2135 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2136 { 2137 struct ieee80211com *ic = ni->ni_ic; 2138 struct ieee80211_node_table *nt = &ic->ic_sta; 2139 struct ieee80211_node *nikey; 2140 ieee80211_keyix keyix; 2141 int isowned, status; 2142 2143 /* 2144 * NB: We must beware of LOR here; deleting the key 2145 * can cause the crypto layer to block traffic updates 2146 * which can generate a LOR against the node table lock; 2147 * grab it here and stash the key index for our use below. 2148 * 2149 * Must also beware of recursion on the node table lock. 2150 * When called from node_cleanup we may already have 2151 * the node table lock held. Unfortunately there's no 2152 * way to separate out this path so we must do this 2153 * conditionally. 2154 */ 2155 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2156 if (!isowned) 2157 IEEE80211_NODE_LOCK(nt); 2158 nikey = NULL; 2159 status = 1; /* NB: success */ 2160 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2161 keyix = ni->ni_ucastkey.wk_rxkeyix; 2162 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2163 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2164 nikey = nt->nt_keyixmap[keyix]; 2165 nt->nt_keyixmap[keyix] = NULL; 2166 } 2167 } 2168 if (!isowned) 2169 IEEE80211_NODE_UNLOCK(nt); 2170 2171 if (nikey != NULL) { 2172 KASSERT(nikey == ni, 2173 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2174 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2175 "%s: delete key map entry %p<%s> refcnt %d\n", 2176 __func__, ni, ether_sprintf(ni->ni_macaddr), 2177 ieee80211_node_refcnt(ni)-1); 2178 ieee80211_free_node(ni); 2179 } 2180 return status; 2181 } 2182 2183 /* 2184 * Reclaim a node. If this is the last reference count then 2185 * do the normal free work. Otherwise remove it from the node 2186 * table and mark it gone by clearing the back-reference. 2187 */ 2188 static void 2189 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2190 { 2191 2192 IEEE80211_NODE_LOCK_ASSERT(nt); 2193 2194 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2195 "%s: remove %p<%s> from %s table, refcnt %d\n", 2196 __func__, ni, ether_sprintf(ni->ni_macaddr), 2197 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2198 /* 2199 * Clear any entry in the unicast key mapping table. 2200 * We need to do it here so rx lookups don't find it 2201 * in the mapping table even if it's not in the hash 2202 * table. We cannot depend on the mapping table entry 2203 * being cleared because the node may not be free'd. 2204 */ 2205 (void)node_clear_keyixmap(nt, ni); 2206 if (!ieee80211_node_dectestref(ni)) { 2207 /* 2208 * Other references are present, just remove the 2209 * node from the table so it cannot be found. When 2210 * the references are dropped storage will be 2211 * reclaimed. 2212 */ 2213 ieee80211_del_node_nt(nt, ni); 2214 } else 2215 _ieee80211_free_node(ni); 2216 } 2217 2218 /* 2219 * Node table support. 2220 */ 2221 2222 static void 2223 ieee80211_node_table_init(struct ieee80211com *ic, 2224 struct ieee80211_node_table *nt, 2225 const char *name, int inact, int keyixmax) 2226 { 2227 2228 nt->nt_ic = ic; 2229 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2230 TAILQ_INIT(&nt->nt_node); 2231 nt->nt_count = 0; 2232 nt->nt_name = name; 2233 nt->nt_inact_init = inact; 2234 nt->nt_keyixmax = keyixmax; 2235 if (nt->nt_keyixmax > 0) { 2236 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2237 keyixmax * sizeof(struct ieee80211_node *), 2238 M_80211_NODE, 2239 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2240 if (nt->nt_keyixmap == NULL) 2241 ic_printf(ic, 2242 "Cannot allocate key index map with %u entries\n", 2243 keyixmax); 2244 } else 2245 nt->nt_keyixmap = NULL; 2246 } 2247 2248 static void 2249 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2250 struct ieee80211vap *match) 2251 { 2252 struct ieee80211_node *ni, *next; 2253 2254 IEEE80211_NODE_LOCK(nt); 2255 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2256 if (match != NULL && ni->ni_vap != match) 2257 continue; 2258 /* XXX can this happen? if so need's work */ 2259 if (ni->ni_associd != 0) { 2260 struct ieee80211vap *vap = ni->ni_vap; 2261 2262 if (vap->iv_auth->ia_node_leave != NULL) 2263 vap->iv_auth->ia_node_leave(ni); 2264 if (vap->iv_aid_bitmap != NULL) 2265 IEEE80211_AID_CLR(vap, ni->ni_associd); 2266 } 2267 ni->ni_wdsvap = NULL; /* clear reference */ 2268 node_reclaim(nt, ni); 2269 } 2270 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2271 /* 2272 * Make a separate pass to clear references to this vap 2273 * held by DWDS entries. They will not be matched above 2274 * because ni_vap will point to the ap vap but we still 2275 * need to clear ni_wdsvap when the WDS vap is destroyed 2276 * and/or reset. 2277 */ 2278 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2279 if (ni->ni_wdsvap == match) 2280 ni->ni_wdsvap = NULL; 2281 } 2282 IEEE80211_NODE_UNLOCK(nt); 2283 } 2284 2285 static void 2286 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2287 { 2288 ieee80211_node_table_reset(nt, NULL); 2289 if (nt->nt_keyixmap != NULL) { 2290 #ifdef DIAGNOSTIC 2291 /* XXX verify all entries are NULL */ 2292 int i; 2293 for (i = 0; i < nt->nt_keyixmax; i++) 2294 if (nt->nt_keyixmap[i] != NULL) 2295 printf("%s: %s[%u] still active\n", __func__, 2296 nt->nt_name, i); 2297 #endif 2298 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2299 nt->nt_keyixmap = NULL; 2300 } 2301 IEEE80211_NODE_LOCK_DESTROY(nt); 2302 } 2303 2304 static void 2305 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2306 { 2307 struct ieee80211com *ic = ni->ni_ic; 2308 struct ieee80211vap *vap = ni->ni_vap; 2309 2310 /* 2311 * Only process stations when in RUN state. This 2312 * insures, for example, that we don't timeout an 2313 * inactive station during CAC. Note that CSA state 2314 * is actually handled in ieee80211_node_timeout as 2315 * it applies to more than timeout processing. 2316 */ 2317 if (vap->iv_state != IEEE80211_S_RUN) 2318 return; 2319 /* 2320 * Ignore entries for which have yet to receive an 2321 * authentication frame. These are transient and 2322 * will be reclaimed when the last reference to them 2323 * goes away (when frame xmits complete). 2324 */ 2325 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2326 vap->iv_opmode == IEEE80211_M_STA) && 2327 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2328 return; 2329 /* 2330 * Free fragment if not needed anymore 2331 * (last fragment older than 1s). 2332 * XXX doesn't belong here, move to node_age 2333 */ 2334 if (ni->ni_rxfrag[0] != NULL && 2335 ticks > ni->ni_rxfragstamp + hz) { 2336 m_freem(ni->ni_rxfrag[0]); 2337 ni->ni_rxfrag[0] = NULL; 2338 } 2339 if (ni->ni_inact > 0) { 2340 ni->ni_inact--; 2341 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2342 "%s: inact %u inact_reload %u nrates %u", 2343 __func__, ni->ni_inact, ni->ni_inact_reload, 2344 ni->ni_rates.rs_nrates); 2345 } 2346 /* 2347 * Special case ourself; we may be idle for extended periods 2348 * of time and regardless reclaiming our state is wrong. 2349 * XXX run ic_node_age 2350 */ 2351 /* XXX before inact decrement? */ 2352 if (ni == vap->iv_bss) 2353 return; 2354 if (ni->ni_associd != 0 || 2355 (vap->iv_opmode == IEEE80211_M_IBSS || 2356 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2357 /* 2358 * Age/drain resources held by the station. 2359 */ 2360 ic->ic_node_age(ni); 2361 /* 2362 * Probe the station before time it out. We 2363 * send a null data frame which may not be 2364 * universally supported by drivers (need it 2365 * for ps-poll support so it should be...). 2366 * 2367 * XXX don't probe the station unless we've 2368 * received a frame from them (and have 2369 * some idea of the rates they are capable 2370 * of); this will get fixed more properly 2371 * soon with better handling of the rate set. 2372 */ 2373 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2374 (0 < ni->ni_inact && 2375 ni->ni_inact <= vap->iv_inact_probe) && 2376 ni->ni_rates.rs_nrates != 0) { 2377 IEEE80211_NOTE(vap, 2378 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2379 ni, "%s", 2380 "probe station due to inactivity"); 2381 /* 2382 * Grab a reference so the node cannot 2383 * be reclaimed before we send the frame. 2384 * ieee80211_send_nulldata understands 2385 * we've done this and reclaims the 2386 * ref for us as needed. 2387 */ 2388 /* XXX fix this (not required anymore). */ 2389 ieee80211_ref_node(ni); 2390 /* XXX useless */ 2391 ieee80211_send_nulldata(ni); 2392 /* XXX stat? */ 2393 return; 2394 } 2395 } 2396 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2397 ni->ni_inact <= 0) { 2398 IEEE80211_NOTE(vap, 2399 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2400 "station timed out due to inactivity " 2401 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2402 /* 2403 * Send a deauthenticate frame and drop the station. 2404 * This is somewhat complicated due to reference counts 2405 * and locking. At this point a station will typically 2406 * have a reference count of 2. ieee80211_node_leave 2407 * will do a "free" of the node which will drop the 2408 * reference count. But in the meantime a reference 2409 * wil be held by the deauth frame. The actual reclaim 2410 * of the node will happen either after the tx is 2411 * completed or by ieee80211_node_leave. 2412 */ 2413 if (ni->ni_associd != 0) { 2414 IEEE80211_SEND_MGMT(ni, 2415 IEEE80211_FC0_SUBTYPE_DEAUTH, 2416 IEEE80211_REASON_AUTH_EXPIRE); 2417 } 2418 ieee80211_node_leave(ni); 2419 vap->iv_stats.is_node_timeout++; 2420 } 2421 } 2422 2423 /* 2424 * Timeout inactive stations and do related housekeeping. 2425 */ 2426 static void 2427 ieee80211_timeout_stations(struct ieee80211com *ic) 2428 { 2429 struct ieee80211_node_table *nt = &ic->ic_sta; 2430 2431 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2432 } 2433 2434 /* 2435 * Aggressively reclaim resources. This should be used 2436 * only in a critical situation to reclaim mbuf resources. 2437 */ 2438 void 2439 ieee80211_drain(struct ieee80211com *ic) 2440 { 2441 struct ieee80211_node_table *nt = &ic->ic_sta; 2442 struct ieee80211vap *vap; 2443 struct ieee80211_node *ni; 2444 2445 IEEE80211_NODE_LOCK(nt); 2446 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2447 /* 2448 * Ignore entries for which have yet to receive an 2449 * authentication frame. These are transient and 2450 * will be reclaimed when the last reference to them 2451 * goes away (when frame xmits complete). 2452 */ 2453 vap = ni->ni_vap; 2454 /* 2455 * Only process stations when in RUN state. This 2456 * insures, for example, that we don't timeout an 2457 * inactive station during CAC. Note that CSA state 2458 * is actually handled in ieee80211_node_timeout as 2459 * it applies to more than timeout processing. 2460 */ 2461 if (vap->iv_state != IEEE80211_S_RUN) 2462 continue; 2463 /* XXX can vap be NULL? */ 2464 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2465 vap->iv_opmode == IEEE80211_M_STA) && 2466 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2467 continue; 2468 /* 2469 * Free fragments. 2470 * XXX doesn't belong here, move to node_drain 2471 */ 2472 if (ni->ni_rxfrag[0] != NULL) { 2473 m_freem(ni->ni_rxfrag[0]); 2474 ni->ni_rxfrag[0] = NULL; 2475 } 2476 /* 2477 * Drain resources held by the station. 2478 */ 2479 ic->ic_node_drain(ni); 2480 } 2481 IEEE80211_NODE_UNLOCK(nt); 2482 } 2483 2484 /* 2485 * Per-ieee80211com inactivity timer callback. 2486 */ 2487 void 2488 ieee80211_node_timeout(void *arg) 2489 { 2490 struct ieee80211com *ic = arg; 2491 2492 /* 2493 * Defer timeout processing if a channel switch is pending. 2494 * We typically need to be mute so not doing things that 2495 * might generate frames is good to handle in one place. 2496 * Suppressing the station timeout processing may extend the 2497 * lifetime of inactive stations (by not decrementing their 2498 * idle counters) but this should be ok unless the CSA is 2499 * active for an unusually long time. 2500 */ 2501 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2502 ieee80211_scan_timeout(ic); 2503 ieee80211_timeout_stations(ic); 2504 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2505 2506 IEEE80211_LOCK(ic); 2507 ieee80211_erp_timeout(ic); 2508 ieee80211_ht_timeout(ic); 2509 ieee80211_vht_timeout(ic); 2510 IEEE80211_UNLOCK(ic); 2511 } 2512 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2513 ieee80211_node_timeout, ic); 2514 } 2515 2516 /* 2517 * The same as ieee80211_iterate_nodes(), but for one vap only. 2518 */ 2519 int 2520 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2521 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2522 { 2523 struct ieee80211_node **ni_arr; 2524 struct ieee80211_node *ni; 2525 size_t size; 2526 int count, i; 2527 2528 /* 2529 * Iterate over the node table and save an array of ref'ed nodes. 2530 * 2531 * This is separated out from calling the actual node function so that 2532 * no LORs will occur. 2533 */ 2534 IEEE80211_NODE_LOCK(nt); 2535 count = nt->nt_count; 2536 size = count * sizeof(struct ieee80211_node *); 2537 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2538 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2539 if (ni_arr == NULL) { 2540 IEEE80211_NODE_UNLOCK(nt); 2541 return (ENOMEM); 2542 } 2543 2544 i = 0; 2545 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2546 if (vap != NULL && ni->ni_vap != vap) 2547 continue; 2548 KASSERT(i < count, 2549 ("node array overflow (vap %p, i %d, count %d)\n", 2550 vap, i, count)); 2551 ni_arr[i] = ieee80211_ref_node(ni); 2552 i++; 2553 } 2554 IEEE80211_NODE_UNLOCK(nt); 2555 2556 for (i = 0; i < count; i++) { 2557 if (ni_arr[i] == NULL) /* end of the list */ 2558 break; 2559 (*f)(arg, ni_arr[i]); 2560 /* ieee80211_free_node() locks by itself */ 2561 ieee80211_free_node(ni_arr[i]); 2562 } 2563 2564 IEEE80211_FREE(ni_arr, M_80211_NODE); 2565 2566 return (0); 2567 } 2568 2569 /* 2570 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2571 * reference in the source. 2572 */ 2573 void 2574 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2575 ieee80211_iter_func *f, void *arg) 2576 { 2577 /* XXX no way to pass error to the caller. */ 2578 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2579 } 2580 2581 void 2582 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2583 { 2584 printf("0x%p: mac %s refcnt %d\n", ni, 2585 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2586 printf("\tauthmode %u flags 0x%x\n", 2587 ni->ni_authmode, ni->ni_flags); 2588 printf("\tassocid 0x%x txpower %u vlan %u\n", 2589 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2590 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2591 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2592 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2593 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2594 ni->ni_rxfragstamp); 2595 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2596 node_getrssi(ni), ni->ni_noise, 2597 ni->ni_intval, ni->ni_capinfo); 2598 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2599 ether_sprintf(ni->ni_bssid), 2600 ni->ni_esslen, ni->ni_essid, 2601 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2602 printf("\tinact %u inact_reload %u txrate %u\n", 2603 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2604 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2605 ni->ni_htcap, ni->ni_htparam, 2606 ni->ni_htctlchan, ni->ni_ht2ndchan); 2607 printf("\thtopmode %x htstbc %x htchw %u\n", 2608 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2609 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2610 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2611 (int) ni->ni_vht_basicmcs); 2612 /* XXX VHT state */ 2613 } 2614 2615 void 2616 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2617 { 2618 ieee80211_iterate_nodes(nt, 2619 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2620 } 2621 2622 static void 2623 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2624 { 2625 struct ieee80211vap *vap; 2626 2627 IEEE80211_LOCK_ASSERT(ic); 2628 2629 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2630 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2631 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2632 } 2633 2634 void 2635 ieee80211_notify_erp(struct ieee80211com *ic) 2636 { 2637 IEEE80211_LOCK(ic); 2638 ieee80211_notify_erp_locked(ic); 2639 IEEE80211_UNLOCK(ic); 2640 } 2641 2642 /* 2643 * Handle a station joining an 11g network. 2644 */ 2645 static void 2646 ieee80211_node_join_11g(struct ieee80211_node *ni) 2647 { 2648 struct ieee80211com *ic = ni->ni_ic; 2649 2650 IEEE80211_LOCK_ASSERT(ic); 2651 2652 /* 2653 * Station isn't capable of short slot time. Bump 2654 * the count of long slot time stations and disable 2655 * use of short slot time. Note that the actual switch 2656 * over to long slot time use may not occur until the 2657 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2658 */ 2659 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2660 ic->ic_longslotsta++; 2661 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2662 "station needs long slot time, count %d", 2663 ic->ic_longslotsta); 2664 /* XXX vap's w/ conflicting needs won't work */ 2665 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2666 /* 2667 * Don't force slot time when switched to turbo 2668 * mode as non-ERP stations won't be present; this 2669 * need only be done when on the normal G channel. 2670 */ 2671 ieee80211_set_shortslottime(ic, 0); 2672 } 2673 } 2674 /* 2675 * If the new station is not an ERP station 2676 * then bump the counter and enable protection 2677 * if configured. 2678 */ 2679 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2680 ic->ic_nonerpsta++; 2681 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2682 "station is !ERP, %d non-ERP stations associated", 2683 ic->ic_nonerpsta); 2684 /* 2685 * If station does not support short preamble 2686 * then we must enable use of Barker preamble. 2687 */ 2688 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2689 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2690 "%s", "station needs long preamble"); 2691 ic->ic_flags |= IEEE80211_F_USEBARKER; 2692 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2693 } 2694 /* 2695 * If protection is configured and this is the first 2696 * indication we should use protection, enable it. 2697 */ 2698 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2699 ic->ic_nonerpsta == 1 && 2700 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2701 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2702 "%s: enable use of protection\n", __func__); 2703 ic->ic_flags |= IEEE80211_F_USEPROT; 2704 ieee80211_notify_erp_locked(ic); 2705 } 2706 } else 2707 ni->ni_flags |= IEEE80211_NODE_ERP; 2708 } 2709 2710 void 2711 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2712 { 2713 struct ieee80211com *ic = ni->ni_ic; 2714 struct ieee80211vap *vap = ni->ni_vap; 2715 int newassoc; 2716 2717 if (ni->ni_associd == 0) { 2718 uint16_t aid; 2719 2720 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2721 /* 2722 * It would be good to search the bitmap 2723 * more efficiently, but this will do for now. 2724 */ 2725 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2726 if (!IEEE80211_AID_ISSET(vap, aid)) 2727 break; 2728 } 2729 if (aid >= vap->iv_max_aid) { 2730 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2731 ieee80211_node_leave(ni); 2732 return; 2733 } 2734 ni->ni_associd = aid | 0xc000; 2735 ni->ni_jointime = time_uptime; 2736 IEEE80211_LOCK(ic); 2737 IEEE80211_AID_SET(vap, ni->ni_associd); 2738 vap->iv_sta_assoc++; 2739 ic->ic_sta_assoc++; 2740 2741 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2742 ieee80211_ht_node_join(ni); 2743 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2744 ieee80211_vht_node_join(ni); 2745 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2746 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2747 ieee80211_node_join_11g(ni); 2748 IEEE80211_UNLOCK(ic); 2749 2750 newassoc = 1; 2751 } else 2752 newassoc = 0; 2753 2754 /* 2755 * XXX VHT - should log VHT channel width, etc 2756 */ 2757 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2758 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2759 IEEE80211_NODE_AID(ni), 2760 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2761 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2762 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2763 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2764 /* XXX update for VHT string */ 2765 ni->ni_flags & IEEE80211_NODE_HT ? 2766 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2767 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2768 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2769 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2770 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2771 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2772 ", fast-frames" : "", 2773 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2774 ", turbo" : "" 2775 ); 2776 2777 ieee80211_node_setuptxparms(ni); 2778 ieee80211_ratectl_node_init(ni); 2779 /* give driver a chance to setup state like ni_txrate */ 2780 if (ic->ic_newassoc != NULL) 2781 ic->ic_newassoc(ni, newassoc); 2782 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2783 /* tell the authenticator about new station */ 2784 if (vap->iv_auth->ia_node_join != NULL) 2785 vap->iv_auth->ia_node_join(ni); 2786 ieee80211_notify_node_join(ni, 2787 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2788 } 2789 2790 static void 2791 disable_protection(struct ieee80211com *ic) 2792 { 2793 KASSERT(ic->ic_nonerpsta == 0 && 2794 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2795 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2796 ic->ic_flags_ext)); 2797 2798 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2799 /* XXX verify mode? */ 2800 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2801 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2802 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2803 } 2804 ieee80211_notify_erp_locked(ic); 2805 } 2806 2807 /* 2808 * Handle a station leaving an 11g network. 2809 */ 2810 static void 2811 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2812 { 2813 struct ieee80211com *ic = ni->ni_ic; 2814 2815 IEEE80211_LOCK_ASSERT(ic); 2816 2817 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2818 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2819 ic->ic_bsschan->ic_flags)); 2820 2821 /* 2822 * If a long slot station do the slot time bookkeeping. 2823 */ 2824 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2825 KASSERT(ic->ic_longslotsta > 0, 2826 ("bogus long slot station count %d", ic->ic_longslotsta)); 2827 ic->ic_longslotsta--; 2828 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2829 "long slot time station leaves, count now %d", 2830 ic->ic_longslotsta); 2831 if (ic->ic_longslotsta == 0) { 2832 /* 2833 * Re-enable use of short slot time if supported 2834 * and not operating in IBSS mode (per spec). 2835 */ 2836 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2837 ic->ic_opmode != IEEE80211_M_IBSS) { 2838 IEEE80211_DPRINTF(ni->ni_vap, 2839 IEEE80211_MSG_ASSOC, 2840 "%s: re-enable use of short slot time\n", 2841 __func__); 2842 ieee80211_set_shortslottime(ic, 1); 2843 } 2844 } 2845 } 2846 /* 2847 * If a non-ERP station do the protection-related bookkeeping. 2848 */ 2849 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2850 KASSERT(ic->ic_nonerpsta > 0, 2851 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2852 ic->ic_nonerpsta--; 2853 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2854 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2855 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2856 " (non-ERP sta present)" : ""); 2857 if (ic->ic_nonerpsta == 0 && 2858 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2859 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2860 "%s: disable use of protection\n", __func__); 2861 disable_protection(ic); 2862 } 2863 } 2864 } 2865 2866 /* 2867 * Time out presence of an overlapping bss with non-ERP 2868 * stations. When operating in hostap mode we listen for 2869 * beacons from other stations and if we identify a non-ERP 2870 * station is present we enable protection. To identify 2871 * when all non-ERP stations are gone we time out this 2872 * condition. 2873 */ 2874 static void 2875 ieee80211_erp_timeout(struct ieee80211com *ic) 2876 { 2877 2878 IEEE80211_LOCK_ASSERT(ic); 2879 2880 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2881 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2882 #if 0 2883 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2884 "%s", "age out non-ERP sta present on channel"); 2885 #endif 2886 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2887 if (ic->ic_nonerpsta == 0) 2888 disable_protection(ic); 2889 } 2890 } 2891 2892 /* 2893 * Handle bookkeeping for station deauthentication/disassociation 2894 * when operating as an ap. 2895 */ 2896 void 2897 ieee80211_node_leave(struct ieee80211_node *ni) 2898 { 2899 struct ieee80211com *ic = ni->ni_ic; 2900 struct ieee80211vap *vap = ni->ni_vap; 2901 struct ieee80211_node_table *nt = ni->ni_table; 2902 2903 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2904 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2905 2906 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2907 ("unexpected operating mode %u", vap->iv_opmode)); 2908 /* 2909 * If node wasn't previously associated all 2910 * we need to do is reclaim the reference. 2911 */ 2912 /* XXX ibss mode bypasses 11g and notification */ 2913 if (ni->ni_associd == 0) 2914 goto done; 2915 /* 2916 * Tell the authenticator the station is leaving. 2917 * Note that we must do this before yanking the 2918 * association id as the authenticator uses the 2919 * associd to locate it's state block. 2920 */ 2921 if (vap->iv_auth->ia_node_leave != NULL) 2922 vap->iv_auth->ia_node_leave(ni); 2923 2924 IEEE80211_LOCK(ic); 2925 IEEE80211_AID_CLR(vap, ni->ni_associd); 2926 vap->iv_sta_assoc--; 2927 ic->ic_sta_assoc--; 2928 2929 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2930 ieee80211_vht_node_leave(ni); 2931 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2932 ieee80211_ht_node_leave(ni); 2933 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2934 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2935 ieee80211_node_leave_11g(ni); 2936 IEEE80211_UNLOCK(ic); 2937 /* 2938 * Cleanup station state. In particular clear various 2939 * state that might otherwise be reused if the node 2940 * is reused before the reference count goes to zero 2941 * (and memory is reclaimed). 2942 */ 2943 ieee80211_sta_leave(ni); 2944 done: 2945 /* 2946 * Remove the node from any table it's recorded in and 2947 * drop the caller's reference. Removal from the table 2948 * is important to insure the node is not reprocessed 2949 * for inactivity. 2950 */ 2951 if (nt != NULL) { 2952 IEEE80211_NODE_LOCK(nt); 2953 node_reclaim(nt, ni); 2954 IEEE80211_NODE_UNLOCK(nt); 2955 } else 2956 ieee80211_free_node(ni); 2957 } 2958 2959 struct rssiinfo { 2960 int rssi_samples; 2961 uint32_t rssi_total; 2962 }; 2963 2964 static void 2965 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2966 { 2967 struct rssiinfo *info = arg; 2968 struct ieee80211vap *vap = ni->ni_vap; 2969 int8_t rssi; 2970 2971 /* only associated stations */ 2972 if (ni->ni_associd == 0) 2973 return; 2974 rssi = vap->iv_ic->ic_node_getrssi(ni); 2975 if (rssi != 0) { 2976 info->rssi_samples++; 2977 info->rssi_total += rssi; 2978 } 2979 } 2980 2981 static void 2982 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2983 { 2984 struct rssiinfo *info = arg; 2985 struct ieee80211vap *vap = ni->ni_vap; 2986 int8_t rssi; 2987 2988 /* only neighbors */ 2989 /* XXX check bssid */ 2990 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2991 return; 2992 rssi = vap->iv_ic->ic_node_getrssi(ni); 2993 if (rssi != 0) { 2994 info->rssi_samples++; 2995 info->rssi_total += rssi; 2996 } 2997 } 2998 2999 #ifdef IEEE80211_SUPPORT_MESH 3000 static void 3001 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3002 { 3003 struct rssiinfo *info = arg; 3004 struct ieee80211vap *vap = ni->ni_vap; 3005 int8_t rssi; 3006 3007 /* only neighbors that peered successfully */ 3008 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3009 return; 3010 rssi = vap->iv_ic->ic_node_getrssi(ni); 3011 if (rssi != 0) { 3012 info->rssi_samples++; 3013 info->rssi_total += rssi; 3014 } 3015 } 3016 #endif /* IEEE80211_SUPPORT_MESH */ 3017 3018 int8_t 3019 ieee80211_getrssi(struct ieee80211vap *vap) 3020 { 3021 #define NZ(x) ((x) == 0 ? 1 : (x)) 3022 struct ieee80211com *ic = vap->iv_ic; 3023 struct rssiinfo info; 3024 3025 info.rssi_total = 0; 3026 info.rssi_samples = 0; 3027 switch (vap->iv_opmode) { 3028 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3029 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3030 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3031 &info); 3032 break; 3033 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3034 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3035 &info); 3036 break; 3037 #ifdef IEEE80211_SUPPORT_MESH 3038 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3039 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3040 &info); 3041 break; 3042 #endif 3043 case IEEE80211_M_MONITOR: /* XXX */ 3044 case IEEE80211_M_STA: /* use stats from associated ap */ 3045 default: 3046 if (vap->iv_bss != NULL) 3047 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3048 info.rssi_samples = 1; 3049 break; 3050 } 3051 return info.rssi_total / NZ(info.rssi_samples); 3052 #undef NZ 3053 } 3054 3055 void 3056 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3057 { 3058 3059 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3060 return; 3061 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3062 /* for non-station mode return avg'd rssi accounting */ 3063 if (vap->iv_opmode != IEEE80211_M_STA) 3064 *rssi = ieee80211_getrssi(vap); 3065 } 3066