1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Atsushi Onoe 5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_wlan.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/mbuf.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 40 #include <sys/socket.h> 41 42 #include <net/if.h> 43 #include <net/if_var.h> 44 #include <net/if_media.h> 45 #include <net/ethernet.h> 46 47 #include <net80211/ieee80211_var.h> 48 #include <net80211/ieee80211_input.h> 49 #ifdef IEEE80211_SUPPORT_SUPERG 50 #include <net80211/ieee80211_superg.h> 51 #endif 52 #ifdef IEEE80211_SUPPORT_TDMA 53 #include <net80211/ieee80211_tdma.h> 54 #endif 55 #include <net80211/ieee80211_wds.h> 56 #include <net80211/ieee80211_mesh.h> 57 #include <net80211/ieee80211_ratectl.h> 58 #include <net80211/ieee80211_vht.h> 59 60 #include <net/bpf.h> 61 62 /* 63 * IEEE80211_NODE_HASHSIZE must be a power of 2. 64 */ 65 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 66 67 /* 68 * Association id's are managed with a bit vector. 69 */ 70 #define IEEE80211_AID_SET(_vap, b) \ 71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 72 (1 << (IEEE80211_AID(b) % 32))) 73 #define IEEE80211_AID_CLR(_vap, b) \ 74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 75 ~(1 << (IEEE80211_AID(b) % 32))) 76 #define IEEE80211_AID_ISSET(_vap, b) \ 77 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 78 79 static int ieee80211_sta_join1(struct ieee80211_node *); 80 81 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 82 const uint8_t [IEEE80211_ADDR_LEN]); 83 static int node_init(struct ieee80211_node *); 84 static void node_cleanup(struct ieee80211_node *); 85 static void node_free(struct ieee80211_node *); 86 static void node_age(struct ieee80211_node *); 87 static int8_t node_getrssi(const struct ieee80211_node *); 88 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 89 static void node_getmimoinfo(const struct ieee80211_node *, 90 struct ieee80211_mimo_info *); 91 92 static void _ieee80211_free_node(struct ieee80211_node *); 93 94 static void node_reclaim(struct ieee80211_node_table *nt, 95 struct ieee80211_node *ni); 96 static void ieee80211_node_table_init(struct ieee80211com *ic, 97 struct ieee80211_node_table *nt, const char *name, 98 int inact, int keymaxix); 99 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 100 struct ieee80211vap *); 101 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 102 static void ieee80211_vap_erp_timeout(struct ieee80211vap *); 103 104 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 105 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 106 107 void 108 ieee80211_node_attach(struct ieee80211com *ic) 109 { 110 /* XXX really want maxlen enforced per-sta */ 111 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 112 "802.11 staging q"); 113 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 114 IEEE80211_INACT_INIT, ic->ic_max_keyix); 115 callout_init(&ic->ic_inact, 1); 116 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 117 ieee80211_node_timeout, ic); 118 119 ic->ic_node_alloc = node_alloc; 120 ic->ic_node_init = node_init; 121 ic->ic_node_free = node_free; 122 ic->ic_node_cleanup = node_cleanup; 123 ic->ic_node_age = node_age; 124 ic->ic_node_drain = node_age; /* NB: same as age */ 125 ic->ic_node_getrssi = node_getrssi; 126 ic->ic_node_getsignal = node_getsignal; 127 ic->ic_node_getmimoinfo = node_getmimoinfo; 128 129 /* 130 * Set flags to be propagated to all vap's; 131 * these define default behaviour/configuration. 132 */ 133 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 134 } 135 136 void 137 ieee80211_node_detach(struct ieee80211com *ic) 138 { 139 140 callout_drain(&ic->ic_inact); 141 ieee80211_node_table_cleanup(&ic->ic_sta); 142 ieee80211_ageq_drain(&ic->ic_stageq); 143 ieee80211_ageq_cleanup(&ic->ic_stageq); 144 } 145 146 void 147 ieee80211_node_vattach(struct ieee80211vap *vap) 148 { 149 /* NB: driver can override */ 150 vap->iv_max_aid = IEEE80211_AID_DEF; 151 152 /* default station inactivity timer settings */ 153 vap->iv_inact_init = IEEE80211_INACT_INIT; 154 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 155 vap->iv_inact_run = IEEE80211_INACT_RUN; 156 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 157 158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 159 "%s: init %u auth %u run %u probe %u\n", __func__, 160 vap->iv_inact_init, vap->iv_inact_auth, 161 vap->iv_inact_run, vap->iv_inact_probe); 162 } 163 164 void 165 ieee80211_node_latevattach(struct ieee80211vap *vap) 166 { 167 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 168 /* XXX should we allow max aid to be zero? */ 169 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 170 vap->iv_max_aid = IEEE80211_AID_MIN; 171 if_printf(vap->iv_ifp, 172 "WARNING: max aid too small, changed to %d\n", 173 vap->iv_max_aid); 174 } 175 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 176 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 177 M_80211_NODE, 178 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 179 if (vap->iv_aid_bitmap == NULL) { 180 /* XXX no way to recover */ 181 printf("%s: no memory for AID bitmap, max aid %d!\n", 182 __func__, vap->iv_max_aid); 183 vap->iv_max_aid = 0; 184 } 185 } 186 187 ieee80211_reset_bss(vap); 188 189 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 190 } 191 192 void 193 ieee80211_node_vdetach(struct ieee80211vap *vap) 194 { 195 struct ieee80211com *ic = vap->iv_ic; 196 197 ieee80211_node_table_reset(&ic->ic_sta, vap); 198 if (vap->iv_bss != NULL) { 199 ieee80211_free_node(vap->iv_bss); 200 vap->iv_update_bss(vap, NULL); 201 } 202 if (vap->iv_aid_bitmap != NULL) { 203 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 204 vap->iv_aid_bitmap = NULL; 205 } 206 } 207 208 /* 209 * Port authorize/unauthorize interfaces for use by an authenticator. 210 */ 211 212 void 213 ieee80211_node_authorize(struct ieee80211_node *ni) 214 { 215 struct ieee80211vap *vap = ni->ni_vap; 216 217 ni->ni_flags |= IEEE80211_NODE_AUTH; 218 ni->ni_inact_reload = vap->iv_inact_run; 219 ni->ni_inact = ni->ni_inact_reload; 220 221 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 222 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 223 } 224 225 void 226 ieee80211_node_unauthorize(struct ieee80211_node *ni) 227 { 228 struct ieee80211vap *vap = ni->ni_vap; 229 230 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 231 ni->ni_inact_reload = vap->iv_inact_auth; 232 if (ni->ni_inact > ni->ni_inact_reload) 233 ni->ni_inact = ni->ni_inact_reload; 234 235 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 236 "%s: inact_reload %u inact %u", __func__, 237 ni->ni_inact_reload, ni->ni_inact); 238 } 239 240 /* 241 * Fix tx parameters for a node according to ``association state''. 242 */ 243 void 244 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 245 { 246 struct ieee80211vap *vap = ni->ni_vap; 247 enum ieee80211_phymode mode; 248 249 if (ni->ni_flags & IEEE80211_NODE_VHT) { 250 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 251 mode = IEEE80211_MODE_VHT_5GHZ; 252 else 253 mode = IEEE80211_MODE_VHT_2GHZ; 254 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 255 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 256 mode = IEEE80211_MODE_11NA; 257 else 258 mode = IEEE80211_MODE_11NG; 259 } else { /* legacy rate handling */ 260 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 261 mode = IEEE80211_MODE_STURBO_A; 262 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 263 mode = IEEE80211_MODE_HALF; 264 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 265 mode = IEEE80211_MODE_QUARTER; 266 /* NB: 108A should be handled as 11a */ 267 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 268 mode = IEEE80211_MODE_11A; 269 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 270 (ni->ni_flags & IEEE80211_NODE_ERP)) 271 mode = IEEE80211_MODE_11G; 272 else 273 mode = IEEE80211_MODE_11B; 274 } 275 ni->ni_txparms = &vap->iv_txparms[mode]; 276 } 277 278 /* 279 * Set/change the channel. The rate set is also updated as 280 * to insure a consistent view by drivers. 281 * XXX should be private but hostap needs it to deal with CSA 282 */ 283 void 284 ieee80211_node_set_chan(struct ieee80211_node *ni, 285 struct ieee80211_channel *chan) 286 { 287 struct ieee80211com *ic = ni->ni_ic; 288 struct ieee80211vap *vap = ni->ni_vap; 289 enum ieee80211_phymode mode; 290 291 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 292 293 ni->ni_chan = chan; 294 mode = ieee80211_chan2mode(chan); 295 if (IEEE80211_IS_CHAN_HT(chan)) { 296 /* 297 * We must install the legacy rate est in ni_rates and the 298 * HT rate set in ni_htrates. 299 */ 300 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 301 /* 302 * Setup bss tx parameters based on operating mode. We 303 * use legacy rates when operating in a mixed HT+non-HT bss 304 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 305 */ 306 if (mode == IEEE80211_MODE_11NA && 307 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 308 mode = IEEE80211_MODE_11A; 309 else if (mode == IEEE80211_MODE_11NG && 310 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 311 mode = IEEE80211_MODE_11G; 312 if (mode == IEEE80211_MODE_11G && 313 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 314 mode = IEEE80211_MODE_11B; 315 } 316 ni->ni_txparms = &vap->iv_txparms[mode]; 317 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 318 } 319 320 static __inline void 321 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 322 { 323 /* propagate useful state */ 324 nbss->ni_authmode = obss->ni_authmode; 325 nbss->ni_txpower = obss->ni_txpower; 326 nbss->ni_vlan = obss->ni_vlan; 327 /* XXX statistics? */ 328 /* XXX legacy WDS bssid? */ 329 } 330 331 void 332 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 333 { 334 struct ieee80211com *ic = vap->iv_ic; 335 struct ieee80211_node *ni; 336 337 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 338 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 339 ieee80211_opmode_name[vap->iv_opmode], 340 ieee80211_chan2ieee(ic, chan), 341 ieee80211_channel_type_char(chan), 342 chan->ic_flags); 343 344 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 345 if (ni == NULL) { 346 /* XXX recovery? */ 347 return; 348 } 349 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 350 ni->ni_esslen = vap->iv_des_ssid[0].len; 351 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 352 if (vap->iv_bss != NULL) 353 copy_bss(ni, vap->iv_bss); 354 ni->ni_intval = ic->ic_bintval; 355 if (vap->iv_flags & IEEE80211_F_PRIVACY) 356 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 357 if (ic->ic_phytype == IEEE80211_T_FH) { 358 ni->ni_fhdwell = 200; /* XXX */ 359 ni->ni_fhindex = 1; 360 } 361 if (vap->iv_opmode == IEEE80211_M_IBSS) { 362 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 363 if (vap->iv_flags & IEEE80211_F_DESBSSID) 364 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 365 else { 366 net80211_get_random_bytes(ni->ni_bssid, 367 IEEE80211_ADDR_LEN); 368 /* clear group bit, add local bit */ 369 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 370 } 371 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 372 if (vap->iv_flags & IEEE80211_F_DESBSSID) 373 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 374 else 375 #ifdef IEEE80211_SUPPORT_TDMA 376 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 377 #endif 378 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 379 #ifdef IEEE80211_SUPPORT_MESH 380 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 381 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 382 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 383 #endif 384 } 385 /* 386 * Fix the channel and related attributes. 387 */ 388 /* clear DFS CAC state on previous channel */ 389 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 390 ic->ic_bsschan->ic_freq != chan->ic_freq && 391 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 392 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 393 ic->ic_bsschan = chan; 394 ieee80211_node_set_chan(ni, chan); 395 ic->ic_curmode = ieee80211_chan2mode(chan); 396 /* 397 * Do mode-specific setup. 398 */ 399 if (IEEE80211_IS_CHAN_FULL(chan)) { 400 if (IEEE80211_IS_CHAN_ANYG(chan)) { 401 /* 402 * Use a mixed 11b/11g basic rate set. 403 */ 404 ieee80211_setbasicrates(&ni->ni_rates, 405 IEEE80211_MODE_11G); 406 if (vap->iv_flags & IEEE80211_F_PUREG) { 407 /* 408 * Also mark OFDM rates basic so 11b 409 * stations do not join (WiFi compliance). 410 */ 411 ieee80211_addbasicrates(&ni->ni_rates, 412 IEEE80211_MODE_11A); 413 } 414 } else if (IEEE80211_IS_CHAN_B(chan)) { 415 /* 416 * Force pure 11b rate set. 417 */ 418 ieee80211_setbasicrates(&ni->ni_rates, 419 IEEE80211_MODE_11B); 420 } 421 } 422 423 /* XXX TODO: other bits and pieces - eg fast-frames? */ 424 425 /* If we're an 11n channel then initialise the 11n bits */ 426 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 427 /* XXX what else? */ 428 ieee80211_ht_node_init(ni); 429 ieee80211_vht_node_init(ni); 430 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 431 /* XXX what else? */ 432 ieee80211_ht_node_init(ni); 433 } 434 435 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 436 } 437 438 /* 439 * Reset bss state on transition to the INIT state. 440 * Clear any stations from the table (they have been 441 * deauth'd) and reset the bss node (clears key, rate 442 * etc. state). 443 */ 444 void 445 ieee80211_reset_bss(struct ieee80211vap *vap) 446 { 447 struct ieee80211com *ic = vap->iv_ic; 448 struct ieee80211_node *ni, *obss; 449 450 ieee80211_node_table_reset(&ic->ic_sta, vap); 451 /* XXX multi-bss: wrong */ 452 ieee80211_vap_reset_erp(vap); 453 454 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 455 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 456 obss = vap->iv_update_bss(vap, ieee80211_ref_node(ni)); 457 if (obss != NULL) { 458 copy_bss(ni, obss); 459 ni->ni_intval = ic->ic_bintval; 460 ieee80211_free_node(obss); 461 } else 462 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 463 } 464 465 static int 466 match_ssid(const struct ieee80211_node *ni, 467 int nssid, const struct ieee80211_scan_ssid ssids[]) 468 { 469 int i; 470 471 for (i = 0; i < nssid; i++) { 472 if (ni->ni_esslen == ssids[i].len && 473 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 474 return 1; 475 } 476 return 0; 477 } 478 479 /* 480 * Test a node for suitability/compatibility. 481 */ 482 static int 483 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 484 { 485 struct ieee80211com *ic = ni->ni_ic; 486 uint8_t rate; 487 488 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 489 return 0; 490 if (vap->iv_opmode == IEEE80211_M_IBSS) { 491 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 492 return 0; 493 } else { 494 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 495 return 0; 496 } 497 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 498 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 499 return 0; 500 } else { 501 /* XXX does this mean privacy is supported or required? */ 502 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 503 return 0; 504 } 505 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 506 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 507 if (rate & IEEE80211_RATE_BASIC) 508 return 0; 509 if (vap->iv_des_nssid != 0 && 510 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 511 return 0; 512 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 513 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 514 return 0; 515 return 1; 516 } 517 518 #ifdef IEEE80211_DEBUG 519 /* 520 * Display node suitability/compatibility. 521 */ 522 static void 523 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 524 { 525 struct ieee80211com *ic = ni->ni_ic; 526 uint8_t rate; 527 int fail; 528 529 fail = 0; 530 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 531 fail |= 0x01; 532 if (vap->iv_opmode == IEEE80211_M_IBSS) { 533 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 534 fail |= 0x02; 535 } else { 536 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 537 fail |= 0x02; 538 } 539 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 540 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 541 fail |= 0x04; 542 } else { 543 /* XXX does this mean privacy is supported or required? */ 544 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 545 fail |= 0x04; 546 } 547 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 548 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 549 if (rate & IEEE80211_RATE_BASIC) 550 fail |= 0x08; 551 if (vap->iv_des_nssid != 0 && 552 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 553 fail |= 0x10; 554 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 555 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 556 fail |= 0x20; 557 558 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 559 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 560 printf(" %3d%c", 561 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 562 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 563 fail & 0x08 ? '!' : ' '); 564 printf(" %4s%c", 565 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 566 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 567 "????", 568 fail & 0x02 ? '!' : ' '); 569 printf(" %3s%c ", 570 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 571 fail & 0x04 ? '!' : ' '); 572 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 573 printf("%s\n", fail & 0x10 ? "!" : ""); 574 } 575 #endif /* IEEE80211_DEBUG */ 576 577 int 578 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 579 { 580 struct ieee80211vap *vap = ni->ni_vap; 581 582 if (ni == vap->iv_bss || 583 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 584 /* unchanged, nothing to do */ 585 return 0; 586 } 587 588 if (!check_bss(vap, ni)) { 589 /* capabilities mismatch */ 590 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 591 "%s: merge failed, capabilities mismatch\n", __func__); 592 #ifdef IEEE80211_DEBUG 593 if (ieee80211_msg_assoc(vap)) 594 check_bss_debug(vap, ni); 595 #endif 596 vap->iv_stats.is_ibss_capmismatch++; 597 return 0; 598 } 599 600 return 1; 601 } 602 603 /* 604 * Check if the given node should populate the node table. 605 * 606 * We need to be in "see all beacons for all ssids" mode in order 607 * to do IBSS merges, however this means we will populate nodes for 608 * /all/ IBSS SSIDs, versus just the one we care about. 609 * 610 * So this check ensures the node can actually belong to our IBSS 611 * configuration. For now it simply checks the SSID. 612 */ 613 int 614 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 615 const struct ieee80211_scanparams *scan) 616 { 617 struct ieee80211vap *vap = ni->ni_vap; 618 int i; 619 620 /* 621 * If we have no SSID and no scan SSID, return OK. 622 */ 623 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 624 goto ok; 625 626 /* 627 * If we have one of (SSID, scan SSID) then return error. 628 */ 629 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 630 goto mismatch; 631 632 /* 633 * Double-check - we need scan SSID. 634 */ 635 if (scan->ssid == NULL) 636 goto mismatch; 637 638 /* 639 * Check if the scan SSID matches the SSID list for the VAP. 640 */ 641 for (i = 0; i < vap->iv_des_nssid; i++) { 642 /* Sanity length check */ 643 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 644 continue; 645 646 /* Note: SSID in the scan entry is the IE format */ 647 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 648 vap->iv_des_ssid[i].len) == 0) 649 goto ok; 650 } 651 652 mismatch: 653 return (0); 654 ok: 655 return (1); 656 } 657 658 /* 659 * Handle 802.11 ad hoc network merge. The 660 * convention, set by the Wireless Ethernet Compatibility Alliance 661 * (WECA), is that an 802.11 station will change its BSSID to match 662 * the "oldest" 802.11 ad hoc network, on the same channel, that 663 * has the station's desired SSID. The "oldest" 802.11 network 664 * sends beacons with the greatest TSF timestamp. 665 * 666 * The caller is assumed to validate TSF's before attempting a merge. 667 * 668 * Return !0 if the BSSID changed, 0 otherwise. 669 */ 670 int 671 ieee80211_ibss_merge(struct ieee80211_node *ni) 672 { 673 #ifdef IEEE80211_DEBUG 674 struct ieee80211vap *vap = ni->ni_vap; 675 #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 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 684 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 685 vap->iv_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_update_bss(vap, selbs); /* NB: caller assumed to bump refcnt */ 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 /* XXX We'll not be in RUN anymore as iv_state got updated already? */ 854 canreassoc = (obss != NULL && 855 vap->iv_state == IEEE80211_S_RUN && 856 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 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_vap_reset_erp(vap); 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_DPRINTF(vap, IEEE80211_MSG_AUTH, 898 "%s %p<%s> %s -> AUTH, FC0_SUBTYPE_DEAUTH\n", 899 __func__, selbs, ether_sprintf(selbs->ni_macaddr), 900 ieee80211_state_name[vap->iv_state]); 901 ieee80211_new_state(vap, IEEE80211_S_AUTH, 902 IEEE80211_FC0_SUBTYPE_DEAUTH); 903 } 904 } else 905 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 906 return 1; 907 } 908 909 int 910 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 911 const struct ieee80211_scan_entry *se) 912 { 913 struct ieee80211com *ic = vap->iv_ic; 914 struct ieee80211_node *ni; 915 int do_ht = 0; 916 917 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 918 if (ni == NULL) { 919 /* XXX msg */ 920 return 0; 921 } 922 923 /* 924 * Expand scan state into node's format. 925 * XXX may not need all this stuff 926 */ 927 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 928 ni->ni_esslen = se->se_ssid[1]; 929 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 930 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 931 ni->ni_intval = se->se_intval; 932 ni->ni_capinfo = se->se_capinfo; 933 ni->ni_chan = chan; 934 ni->ni_timoff = se->se_timoff; 935 ni->ni_fhdwell = se->se_fhdwell; 936 ni->ni_fhindex = se->se_fhindex; 937 ni->ni_erp = se->se_erp; 938 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 939 ni->ni_noise = se->se_noise; 940 if (vap->iv_opmode == IEEE80211_M_STA) { 941 /* NB: only infrastructure mode requires an associd */ 942 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 943 } 944 945 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 946 ieee80211_ies_expand(&ni->ni_ies); 947 #ifdef IEEE80211_SUPPORT_SUPERG 948 if (ni->ni_ies.ath_ie != NULL) 949 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 950 #endif 951 if (ni->ni_ies.htcap_ie != NULL) 952 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 953 if (ni->ni_ies.htinfo_ie != NULL) 954 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 955 #ifdef IEEE80211_SUPPORT_MESH 956 if (ni->ni_ies.meshid_ie != NULL) 957 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 958 #endif 959 #ifdef IEEE80211_SUPPORT_TDMA 960 if (ni->ni_ies.tdma_ie != NULL) 961 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 962 #endif 963 if (ni->ni_ies.vhtcap_ie != NULL) 964 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 965 if (ni->ni_ies.vhtopmode_ie != NULL) 966 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 967 968 /* XXX parse BSSLOAD IE */ 969 /* XXX parse TXPWRENV IE */ 970 /* XXX parse APCHANREP IE */ 971 } 972 973 vap->iv_dtim_period = se->se_dtimperiod; 974 vap->iv_dtim_count = 0; 975 976 /* NB: must be after ni_chan is setup */ 977 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 978 IEEE80211_F_DOSORT); 979 if (ieee80211_iserp_rateset(&ni->ni_rates)) 980 ni->ni_flags |= IEEE80211_NODE_ERP; 981 982 /* 983 * Setup HT state for this node if it's available, otherwise 984 * non-STA modes won't pick this state up. 985 * 986 * For IBSS and related modes that don't go through an 987 * association request/response, the only appropriate place 988 * to setup the HT state is here. 989 */ 990 if (ni->ni_ies.htinfo_ie != NULL && 991 ni->ni_ies.htcap_ie != NULL && 992 vap->iv_flags_ht & IEEE80211_FHT_HT) { 993 ieee80211_ht_node_init(ni); 994 ieee80211_ht_updateparams(ni, 995 ni->ni_ies.htcap_ie, 996 ni->ni_ies.htinfo_ie); 997 do_ht = 1; 998 } 999 1000 /* 1001 * Setup VHT state for this node if it's available. 1002 * Same as the above. 1003 * 1004 * For now, don't allow 2GHz VHT operation. 1005 */ 1006 if (ni->ni_ies.vhtopmode_ie != NULL && 1007 ni->ni_ies.vhtcap_ie != NULL && 1008 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1009 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1010 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1011 __func__, 1012 ni->ni_macaddr, 1013 ":"); 1014 } else { 1015 ieee80211_vht_node_init(ni); 1016 ieee80211_vht_updateparams(ni, 1017 ni->ni_ies.vhtcap_ie, 1018 ni->ni_ies.vhtopmode_ie); 1019 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1020 ni->ni_ies.vhtopmode_ie); 1021 do_ht = 1; 1022 } 1023 } 1024 1025 /* Finally do the node channel change */ 1026 if (do_ht) { 1027 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1028 ni->ni_ies.htinfo_ie); 1029 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1030 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1031 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1032 } 1033 1034 /* XXX else check for ath FF? */ 1035 /* XXX QoS? Difficult given that WME config is specific to a master */ 1036 1037 ieee80211_node_setuptxparms(ni); 1038 ieee80211_ratectl_node_init(ni); 1039 1040 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1041 } 1042 1043 /* 1044 * Leave the specified IBSS/BSS network. The node is assumed to 1045 * be passed in with a held reference. 1046 */ 1047 void 1048 ieee80211_sta_leave(struct ieee80211_node *ni) 1049 { 1050 struct ieee80211com *ic = ni->ni_ic; 1051 1052 ic->ic_node_cleanup(ni); 1053 ieee80211_notify_node_leave(ni); 1054 } 1055 1056 /* 1057 * Send a deauthenticate frame and drop the station. 1058 */ 1059 void 1060 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1061 { 1062 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1063 ieee80211_ref_node(ni); 1064 if (ni->ni_associd != 0) 1065 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1066 ieee80211_node_leave(ni); 1067 ieee80211_free_node(ni); 1068 } 1069 1070 static struct ieee80211_node * 1071 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1072 { 1073 struct ieee80211_node *ni; 1074 1075 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1076 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1077 return ni; 1078 } 1079 1080 static int 1081 node_init(struct ieee80211_node *ni) 1082 { 1083 return 0; 1084 } 1085 1086 /* 1087 * Initialize an ie blob with the specified data. If previous 1088 * data exists re-use the data block. As a side effect we clear 1089 * all references to specific ie's; the caller is required to 1090 * recalculate them. 1091 */ 1092 int 1093 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1094 { 1095 /* NB: assumes data+len are the last fields */ 1096 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1097 if (ies->data != NULL && ies->len != len) { 1098 /* data size changed */ 1099 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1100 ies->data = NULL; 1101 } 1102 if (ies->data == NULL) { 1103 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1104 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1105 if (ies->data == NULL) { 1106 ies->len = 0; 1107 /* NB: pointers have already been zero'd above */ 1108 return 0; 1109 } 1110 } 1111 memcpy(ies->data, data, len); 1112 ies->len = len; 1113 return 1; 1114 } 1115 1116 /* 1117 * Reclaim storage for an ie blob. 1118 */ 1119 void 1120 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1121 { 1122 if (ies->data != NULL) 1123 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1124 } 1125 1126 /* 1127 * Expand an ie blob data contents and to fillin individual 1128 * ie pointers. The data blob is assumed to be well-formed; 1129 * we don't do any validity checking of ie lengths. 1130 */ 1131 void 1132 ieee80211_ies_expand(struct ieee80211_ies *ies) 1133 { 1134 uint8_t *ie; 1135 int ielen; 1136 1137 ie = ies->data; 1138 ielen = ies->len; 1139 while (ielen > 1) { 1140 /* Make sure the given IE length fits into the total length. */ 1141 if ((2 + ie[1]) > ielen) { 1142 printf("%s: malformed IEs! ies %p { data %p len %d }: " 1143 "ie %u len 2+%u > total len left %d\n", 1144 __func__, ies, ies->data, ies->len, 1145 ie[0], ie[1], ielen); 1146 return; 1147 } 1148 switch (ie[0]) { 1149 case IEEE80211_ELEMID_VENDOR: 1150 if (iswpaoui(ie)) 1151 ies->wpa_ie = ie; 1152 else if (iswmeoui(ie)) 1153 ies->wme_ie = ie; 1154 #ifdef IEEE80211_SUPPORT_SUPERG 1155 else if (isatherosoui(ie)) 1156 ies->ath_ie = ie; 1157 #endif 1158 #ifdef IEEE80211_SUPPORT_TDMA 1159 else if (istdmaoui(ie)) 1160 ies->tdma_ie = ie; 1161 #endif 1162 break; 1163 case IEEE80211_ELEMID_RSN: 1164 ies->rsn_ie = ie; 1165 break; 1166 case IEEE80211_ELEMID_HTCAP: 1167 ies->htcap_ie = ie; 1168 break; 1169 case IEEE80211_ELEMID_HTINFO: 1170 ies->htinfo_ie = ie; 1171 break; 1172 #ifdef IEEE80211_SUPPORT_MESH 1173 case IEEE80211_ELEMID_MESHID: 1174 ies->meshid_ie = ie; 1175 break; 1176 #endif 1177 case IEEE80211_ELEMID_VHT_CAP: 1178 ies->vhtcap_ie = ie; 1179 break; 1180 case IEEE80211_ELEMID_VHT_OPMODE: 1181 ies->vhtopmode_ie = ie; 1182 break; 1183 case IEEE80211_ELEMID_VHT_PWR_ENV: 1184 ies->vhtpwrenv_ie = ie; 1185 break; 1186 case IEEE80211_ELEMID_BSSLOAD: 1187 ies->bssload_ie = ie; 1188 break; 1189 case IEEE80211_ELEMID_APCHANREP: 1190 ies->apchanrep_ie = ie; 1191 break; 1192 } 1193 ielen -= 2 + ie[1]; 1194 ie += 2 + ie[1]; 1195 } 1196 } 1197 1198 /* 1199 * Reclaim any resources in a node and reset any critical 1200 * state. Typically nodes are free'd immediately after, 1201 * but in some cases the storage may be reused so we need 1202 * to insure consistent state (should probably fix that). 1203 */ 1204 static void 1205 node_cleanup(struct ieee80211_node *ni) 1206 { 1207 struct ieee80211vap *vap = ni->ni_vap; 1208 struct ieee80211com *ic = ni->ni_ic; 1209 int i; 1210 1211 /* NB: preserve ni_table */ 1212 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1213 if (vap->iv_opmode != IEEE80211_M_STA) 1214 vap->iv_ps_sta--; 1215 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1216 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1217 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1218 } 1219 /* 1220 * Cleanup any VHT and HT-related state. 1221 */ 1222 if (ni->ni_flags & IEEE80211_NODE_VHT) 1223 ieee80211_vht_node_cleanup(ni); 1224 if (ni->ni_flags & IEEE80211_NODE_HT) 1225 ieee80211_ht_node_cleanup(ni); 1226 #ifdef IEEE80211_SUPPORT_SUPERG 1227 /* Always do FF node cleanup; for A-MSDU */ 1228 ieee80211_ff_node_cleanup(ni); 1229 #endif 1230 #ifdef IEEE80211_SUPPORT_MESH 1231 /* 1232 * Cleanup any mesh-related state. 1233 */ 1234 if (vap->iv_opmode == IEEE80211_M_MBSS) 1235 ieee80211_mesh_node_cleanup(ni); 1236 #endif 1237 /* 1238 * Clear any staging queue entries. 1239 */ 1240 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1241 1242 /* 1243 * Clear AREF flag that marks the authorization refcnt bump 1244 * has happened. This is probably not needed as the node 1245 * should always be removed from the table so not found but 1246 * do it just in case. 1247 * Likewise clear the ASSOCID flag as these flags are intended 1248 * to be managed in tandem. 1249 */ 1250 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1251 1252 /* 1253 * Drain power save queue and, if needed, clear TIM. 1254 */ 1255 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1256 vap->iv_set_tim(ni, 0); 1257 1258 ni->ni_associd = 0; 1259 if (ni->ni_challenge != NULL) { 1260 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1261 ni->ni_challenge = NULL; 1262 } 1263 /* 1264 * Preserve SSID, WPA, and WME ie's so the bss node is 1265 * reusable during a re-auth/re-assoc state transition. 1266 * If we remove these data they will not be recreated 1267 * because they come from a probe-response or beacon frame 1268 * which cannot be expected prior to the association-response. 1269 * This should not be an issue when operating in other modes 1270 * as stations leaving always go through a full state transition 1271 * which will rebuild this state. 1272 * 1273 * XXX does this leave us open to inheriting old state? 1274 */ 1275 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1276 if (ni->ni_rxfrag[i] != NULL) { 1277 m_freem(ni->ni_rxfrag[i]); 1278 ni->ni_rxfrag[i] = NULL; 1279 } 1280 /* 1281 * Must be careful here to remove any key map entry w/o a LOR. 1282 */ 1283 ieee80211_node_delucastkey(ni); 1284 } 1285 1286 static void 1287 node_free(struct ieee80211_node *ni) 1288 { 1289 struct ieee80211com *ic = ni->ni_ic; 1290 1291 ieee80211_ratectl_node_deinit(ni); 1292 ic->ic_node_cleanup(ni); 1293 ieee80211_ies_cleanup(&ni->ni_ies); 1294 ieee80211_psq_cleanup(&ni->ni_psq); 1295 IEEE80211_FREE(ni, M_80211_NODE); 1296 } 1297 1298 static void 1299 node_age(struct ieee80211_node *ni) 1300 { 1301 struct ieee80211vap *vap = ni->ni_vap; 1302 1303 /* 1304 * Age frames on the power save queue. 1305 */ 1306 if (ieee80211_node_psq_age(ni) != 0 && 1307 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1308 vap->iv_set_tim(ni, 0); 1309 /* 1310 * Age out HT resources (e.g. frames on the 1311 * A-MPDU reorder queues). 1312 */ 1313 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1314 ieee80211_ht_node_age(ni); 1315 } 1316 1317 static int8_t 1318 node_getrssi(const struct ieee80211_node *ni) 1319 { 1320 uint32_t avgrssi = ni->ni_avgrssi; 1321 int32_t rssi; 1322 1323 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1324 return 0; 1325 rssi = IEEE80211_RSSI_GET(avgrssi); 1326 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1327 } 1328 1329 static void 1330 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1331 { 1332 *rssi = node_getrssi(ni); 1333 *noise = ni->ni_noise; 1334 } 1335 1336 static void 1337 node_getmimoinfo(const struct ieee80211_node *ni, 1338 struct ieee80211_mimo_info *info) 1339 { 1340 int i; 1341 uint32_t avgrssi; 1342 int32_t rssi; 1343 1344 bzero(info, sizeof(*info)); 1345 1346 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1347 /* Note: for now, just pri20 channel info */ 1348 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1349 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1350 info->ch[i].rssi[0] = 0; 1351 } else { 1352 rssi = IEEE80211_RSSI_GET(avgrssi); 1353 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1354 } 1355 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1356 } 1357 1358 /* XXX ext radios? */ 1359 1360 /* XXX EVM? */ 1361 } 1362 1363 static void 1364 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1365 struct ieee80211_node *ni) 1366 { 1367 struct ieee80211com *ic = nt->nt_ic; 1368 int hash; 1369 1370 IEEE80211_NODE_LOCK_ASSERT(nt); 1371 1372 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1373 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1374 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1375 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1376 nt->nt_count++; 1377 ni->ni_table = nt; 1378 } 1379 1380 static void 1381 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1382 struct ieee80211_node *ni) 1383 { 1384 1385 IEEE80211_NODE_LOCK_ASSERT(nt); 1386 1387 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1388 LIST_REMOVE(ni, ni_hash); 1389 nt->nt_count--; 1390 KASSERT(nt->nt_count >= 0, 1391 ("nt_count is negative (%d)!\n", nt->nt_count)); 1392 ni->ni_table = NULL; 1393 } 1394 1395 struct ieee80211_node * 1396 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1397 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1398 { 1399 struct ieee80211com *ic = nt->nt_ic; 1400 struct ieee80211_node *ni; 1401 1402 ni = ic->ic_node_alloc(vap, macaddr); 1403 if (ni == NULL) { 1404 vap->iv_stats.is_rx_nodealloc++; 1405 return NULL; 1406 } 1407 1408 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1409 "%s %p<%s> in %s table\n", __func__, ni, 1410 ether_sprintf(macaddr), nt->nt_name); 1411 1412 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1413 ieee80211_node_initref(ni); /* mark referenced */ 1414 ni->ni_chan = IEEE80211_CHAN_ANYC; 1415 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1416 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1417 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1418 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1419 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1420 ni->ni_inact_reload = nt->nt_inact_init; 1421 ni->ni_inact = ni->ni_inact_reload; 1422 ni->ni_ath_defkeyix = 0x7fff; 1423 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1424 #ifdef IEEE80211_SUPPORT_MESH 1425 if (vap->iv_opmode == IEEE80211_M_MBSS) 1426 ieee80211_mesh_node_init(vap, ni); 1427 #endif 1428 IEEE80211_NODE_LOCK(nt); 1429 ieee80211_add_node_nt(nt, ni); 1430 ni->ni_vap = vap; 1431 ni->ni_ic = ic; 1432 IEEE80211_NODE_UNLOCK(nt); 1433 1434 /* handle failure; free node state */ 1435 if (ic->ic_node_init(ni) != 0) { 1436 vap->iv_stats.is_rx_nodealloc++; 1437 ieee80211_psq_cleanup(&ni->ni_psq); 1438 ieee80211_ratectl_node_deinit(ni); 1439 _ieee80211_free_node(ni); 1440 return NULL; 1441 } 1442 1443 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1444 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1445 1446 return ni; 1447 } 1448 1449 /* 1450 * Craft a temporary node suitable for sending a management frame 1451 * to the specified station. We craft only as much state as we 1452 * need to do the work since the node will be immediately reclaimed 1453 * once the send completes. 1454 */ 1455 struct ieee80211_node * 1456 ieee80211_tmp_node(struct ieee80211vap *vap, 1457 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1458 { 1459 struct ieee80211com *ic = vap->iv_ic; 1460 struct ieee80211_node *ni; 1461 1462 ni = ic->ic_node_alloc(vap, macaddr); 1463 if (ni != NULL) { 1464 struct ieee80211_node *bss = vap->iv_bss; 1465 1466 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1467 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1468 1469 ni->ni_table = NULL; /* NB: pedantic */ 1470 ni->ni_ic = ic; /* NB: needed to set channel */ 1471 ni->ni_vap = vap; 1472 1473 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1474 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1475 ieee80211_node_initref(ni); /* mark referenced */ 1476 /* NB: required by ieee80211_fix_rate */ 1477 ieee80211_node_set_chan(ni, bss->ni_chan); 1478 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1479 IEEE80211_KEYIX_NONE); 1480 ni->ni_txpower = bss->ni_txpower; 1481 /* XXX optimize away */ 1482 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1483 1484 ieee80211_ratectl_node_init(ni); 1485 1486 /* handle failure; free node state */ 1487 if (ic->ic_node_init(ni) != 0) { 1488 vap->iv_stats.is_rx_nodealloc++; 1489 ieee80211_psq_cleanup(&ni->ni_psq); 1490 ieee80211_ratectl_node_deinit(ni); 1491 _ieee80211_free_node(ni); 1492 return NULL; 1493 } 1494 1495 } else { 1496 /* XXX msg */ 1497 vap->iv_stats.is_rx_nodealloc++; 1498 } 1499 return ni; 1500 } 1501 1502 struct ieee80211_node * 1503 ieee80211_dup_bss(struct ieee80211vap *vap, 1504 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1505 { 1506 struct ieee80211com *ic = vap->iv_ic; 1507 struct ieee80211_node *ni; 1508 1509 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1510 if (ni != NULL) { 1511 struct ieee80211_node *bss = vap->iv_bss; 1512 /* 1513 * Inherit from iv_bss. 1514 */ 1515 copy_bss(ni, bss); 1516 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1517 ieee80211_node_set_chan(ni, bss->ni_chan); 1518 } 1519 return ni; 1520 } 1521 1522 /* 1523 * Create a bss node for a legacy WDS vap. The far end does 1524 * not associate so we just create create a new node and 1525 * simulate an association. The caller is responsible for 1526 * installing the node as the bss node and handling any further 1527 * setup work like authorizing the port. 1528 */ 1529 struct ieee80211_node * 1530 ieee80211_node_create_wds(struct ieee80211vap *vap, 1531 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1532 { 1533 struct ieee80211com *ic = vap->iv_ic; 1534 struct ieee80211_node *ni; 1535 1536 /* XXX check if node already in sta table? */ 1537 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1538 if (ni != NULL) { 1539 ni->ni_wdsvap = vap; 1540 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1541 /* 1542 * Inherit any manually configured settings. 1543 */ 1544 copy_bss(ni, vap->iv_bss); 1545 ieee80211_node_set_chan(ni, chan); 1546 /* NB: propagate ssid so available to WPA supplicant */ 1547 ni->ni_esslen = vap->iv_des_ssid[0].len; 1548 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1549 /* NB: no associd for peer */ 1550 /* 1551 * There are no management frames to use to 1552 * discover neighbor capabilities, so blindly 1553 * propagate the local configuration. 1554 */ 1555 if (vap->iv_flags & IEEE80211_F_WME) 1556 ni->ni_flags |= IEEE80211_NODE_QOS; 1557 #ifdef IEEE80211_SUPPORT_SUPERG 1558 if (vap->iv_flags & IEEE80211_F_FF) 1559 ni->ni_flags |= IEEE80211_NODE_FF; 1560 #endif 1561 /* XXX VHT */ 1562 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1563 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1564 /* 1565 * Device is HT-capable and HT is enabled for 1566 * the vap; setup HT operation. On return 1567 * ni_chan will be adjusted to an HT channel. 1568 */ 1569 ieee80211_ht_wds_init(ni); 1570 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1571 printf("%s: TODO: vht_wds_init\n", __func__); 1572 } 1573 } else { 1574 struct ieee80211_channel *c = ni->ni_chan; 1575 /* 1576 * Force a legacy channel to be used. 1577 */ 1578 c = ieee80211_find_channel(ic, 1579 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1580 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1581 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1582 ni->ni_chan = c; 1583 } 1584 } 1585 return ni; 1586 } 1587 1588 struct ieee80211_node * 1589 #ifdef IEEE80211_DEBUG_REFCNT 1590 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1591 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1592 #else 1593 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1594 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1595 #endif 1596 { 1597 struct ieee80211_node *ni; 1598 int hash; 1599 1600 IEEE80211_NODE_LOCK_ASSERT(nt); 1601 1602 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1603 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1604 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1605 ieee80211_ref_node(ni); /* mark referenced */ 1606 #ifdef IEEE80211_DEBUG_REFCNT 1607 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1608 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1609 func, line, 1610 ni, ether_sprintf(ni->ni_macaddr), 1611 ieee80211_node_refcnt(ni)); 1612 #endif 1613 return ni; 1614 } 1615 } 1616 return NULL; 1617 } 1618 1619 struct ieee80211_node * 1620 #ifdef IEEE80211_DEBUG_REFCNT 1621 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1622 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1623 #else 1624 ieee80211_find_node(struct ieee80211_node_table *nt, 1625 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1626 #endif 1627 { 1628 struct ieee80211_node *ni; 1629 1630 IEEE80211_NODE_LOCK(nt); 1631 ni = ieee80211_find_node_locked(nt, macaddr); 1632 IEEE80211_NODE_UNLOCK(nt); 1633 return ni; 1634 } 1635 1636 struct ieee80211_node * 1637 #ifdef IEEE80211_DEBUG_REFCNT 1638 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1639 const struct ieee80211vap *vap, 1640 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1641 #else 1642 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1643 const struct ieee80211vap *vap, 1644 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1645 #endif 1646 { 1647 struct ieee80211_node *ni; 1648 int hash; 1649 1650 IEEE80211_NODE_LOCK_ASSERT(nt); 1651 1652 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1653 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1654 if (ni->ni_vap == vap && 1655 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1656 ieee80211_ref_node(ni); /* mark referenced */ 1657 #ifdef IEEE80211_DEBUG_REFCNT 1658 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1659 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1660 func, line, 1661 ni, ether_sprintf(ni->ni_macaddr), 1662 ieee80211_node_refcnt(ni)); 1663 #endif 1664 return ni; 1665 } 1666 } 1667 return NULL; 1668 } 1669 1670 struct ieee80211_node * 1671 #ifdef IEEE80211_DEBUG_REFCNT 1672 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1673 const struct ieee80211vap *vap, 1674 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1675 #else 1676 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1677 const struct ieee80211vap *vap, 1678 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1679 #endif 1680 { 1681 struct ieee80211_node *ni; 1682 1683 IEEE80211_NODE_LOCK(nt); 1684 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1685 IEEE80211_NODE_UNLOCK(nt); 1686 return ni; 1687 } 1688 1689 /* 1690 * Fake up a node; this handles node discovery in adhoc mode. 1691 * Note that for the driver's benefit we we treat this like 1692 * an association so the driver has an opportunity to setup 1693 * it's private state. 1694 */ 1695 struct ieee80211_node * 1696 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1697 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1698 { 1699 struct ieee80211_node *ni; 1700 1701 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1702 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1703 ni = ieee80211_dup_bss(vap, macaddr); 1704 if (ni != NULL) { 1705 struct ieee80211com *ic = vap->iv_ic; 1706 1707 /* XXX no rate negotiation; just dup */ 1708 ni->ni_rates = vap->iv_bss->ni_rates; 1709 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1710 ni->ni_flags |= IEEE80211_NODE_ERP; 1711 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1712 /* 1713 * In adhoc demo mode there are no management 1714 * frames to use to discover neighbor capabilities, 1715 * so blindly propagate the local configuration 1716 * so we can do interesting things (e.g. use 1717 * WME to disable ACK's). 1718 */ 1719 /* 1720 * XXX TODO: 11n? 1721 */ 1722 if (vap->iv_flags & IEEE80211_F_WME) 1723 ni->ni_flags |= IEEE80211_NODE_QOS; 1724 #ifdef IEEE80211_SUPPORT_SUPERG 1725 if (vap->iv_flags & IEEE80211_F_FF) 1726 ni->ni_flags |= IEEE80211_NODE_FF; 1727 #endif 1728 } 1729 ieee80211_node_setuptxparms(ni); 1730 ieee80211_ratectl_node_init(ni); 1731 1732 /* 1733 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1734 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1735 * that after we hear that we can indeed do 11n 1736 * (either by a beacon frame or by a probe response.) 1737 */ 1738 1739 /* 1740 * This is the first time we see the node. 1741 */ 1742 if (ic->ic_newassoc != NULL) 1743 ic->ic_newassoc(ni, 1); 1744 1745 /* 1746 * Kick off a probe request to the given node; 1747 * we will then use the probe response to update 1748 * 11n/etc configuration state. 1749 * 1750 * XXX TODO: this isn't guaranteed, and until we get 1751 * a probe response, we won't be able to actually 1752 * do anything 802.11n related to the node. 1753 * So if this does indeed work, maybe we should hold 1754 * off on sending responses until we get the probe 1755 * response, or just default to some sensible subset 1756 * of 802.11n behaviour (eg always allow aggregation 1757 * negotiation TO us, but not FROM us, etc) so we 1758 * aren't entirely busted. 1759 */ 1760 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1761 ieee80211_send_probereq(ni, /* node */ 1762 vap->iv_myaddr, /* SA */ 1763 ni->ni_macaddr, /* DA */ 1764 vap->iv_bss->ni_bssid, /* BSSID */ 1765 vap->iv_bss->ni_essid, 1766 vap->iv_bss->ni_esslen); /* SSID */ 1767 } 1768 1769 /* XXX not right for 802.1x/WPA */ 1770 ieee80211_node_authorize(ni); 1771 } 1772 return ni; 1773 } 1774 1775 void 1776 ieee80211_init_neighbor(struct ieee80211_node *ni, 1777 const struct ieee80211_frame *wh, 1778 const struct ieee80211_scanparams *sp) 1779 { 1780 int do_ht_setup = 0, do_vht_setup = 0; 1781 1782 ni->ni_esslen = sp->ssid[1]; 1783 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1784 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1785 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1786 ni->ni_intval = sp->bintval; 1787 ni->ni_capinfo = sp->capinfo; 1788 ni->ni_chan = ni->ni_ic->ic_curchan; 1789 ni->ni_fhdwell = sp->fhdwell; 1790 ni->ni_fhindex = sp->fhindex; 1791 ni->ni_erp = sp->erp; 1792 ni->ni_timoff = sp->timoff; 1793 #ifdef IEEE80211_SUPPORT_MESH 1794 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1795 ieee80211_mesh_init_neighbor(ni, wh, sp); 1796 #endif 1797 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1798 ieee80211_ies_expand(&ni->ni_ies); 1799 if (ni->ni_ies.wme_ie != NULL) 1800 ni->ni_flags |= IEEE80211_NODE_QOS; 1801 else 1802 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1803 #ifdef IEEE80211_SUPPORT_SUPERG 1804 if (ni->ni_ies.ath_ie != NULL) 1805 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1806 #endif 1807 if (ni->ni_ies.htcap_ie != NULL) 1808 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1809 if (ni->ni_ies.htinfo_ie != NULL) 1810 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1811 1812 if (ni->ni_ies.vhtcap_ie != NULL) 1813 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1814 if (ni->ni_ies.vhtopmode_ie != NULL) 1815 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1816 1817 if ((ni->ni_ies.htcap_ie != NULL) && 1818 (ni->ni_ies.htinfo_ie != NULL) && 1819 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1820 do_ht_setup = 1; 1821 } 1822 1823 if ((ni->ni_ies.vhtcap_ie != NULL) && 1824 (ni->ni_ies.vhtopmode_ie != NULL) && 1825 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1826 do_vht_setup = 1; 1827 } 1828 } 1829 1830 /* NB: must be after ni_chan is setup */ 1831 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1832 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1833 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1834 1835 /* 1836 * If the neighbor is HT compatible, flip that on. 1837 */ 1838 if (do_ht_setup) { 1839 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1840 "%s: doing HT setup\n", __func__); 1841 ieee80211_ht_node_init(ni); 1842 ieee80211_ht_updateparams(ni, 1843 ni->ni_ies.htcap_ie, 1844 ni->ni_ies.htinfo_ie); 1845 1846 if (do_vht_setup) { 1847 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1848 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1849 __func__, 1850 ni->ni_macaddr, 1851 ":"); 1852 } else { 1853 ieee80211_vht_node_init(ni); 1854 ieee80211_vht_updateparams(ni, 1855 ni->ni_ies.vhtcap_ie, 1856 ni->ni_ies.vhtopmode_ie); 1857 ieee80211_setup_vht_rates(ni, 1858 ni->ni_ies.vhtcap_ie, 1859 ni->ni_ies.vhtopmode_ie); 1860 } 1861 } 1862 1863 /* 1864 * Finally do the channel upgrade/change based 1865 * on the HT/VHT configuration. 1866 */ 1867 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1868 ni->ni_ies.htinfo_ie); 1869 ieee80211_setup_htrates(ni, 1870 ni->ni_ies.htcap_ie, 1871 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1872 ieee80211_setup_basic_htrates(ni, 1873 ni->ni_ies.htinfo_ie); 1874 1875 ieee80211_node_setuptxparms(ni); 1876 ieee80211_ratectl_node_init(ni); 1877 1878 /* Reassociate; we're now 11n/11ac */ 1879 /* 1880 * XXX TODO: this is the wrong thing to do - 1881 * we're calling it with isnew=1 so the ath(4) 1882 * driver reinitialises the rate tables. 1883 * This "mostly" works for ath(4), but it won't 1884 * be right for firmware devices which allocate 1885 * node states. 1886 * 1887 * So, do we just create a new node and delete 1888 * the old one? Or? 1889 */ 1890 if (ni->ni_ic->ic_newassoc) 1891 ni->ni_ic->ic_newassoc(ni, 1); 1892 } 1893 } 1894 1895 /* 1896 * Do node discovery in adhoc mode on receipt of a beacon 1897 * or probe response frame. Note that for the driver's 1898 * benefit we we treat this like an association so the 1899 * driver has an opportunity to setup it's private state. 1900 */ 1901 struct ieee80211_node * 1902 ieee80211_add_neighbor(struct ieee80211vap *vap, 1903 const struct ieee80211_frame *wh, 1904 const struct ieee80211_scanparams *sp) 1905 { 1906 struct ieee80211_node *ni; 1907 1908 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1909 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1910 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1911 if (ni != NULL) { 1912 struct ieee80211com *ic = vap->iv_ic; 1913 1914 ieee80211_init_neighbor(ni, wh, sp); 1915 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1916 ni->ni_flags |= IEEE80211_NODE_ERP; 1917 ieee80211_node_setuptxparms(ni); 1918 ieee80211_ratectl_node_init(ni); 1919 if (ic->ic_newassoc != NULL) 1920 ic->ic_newassoc(ni, 1); 1921 /* XXX not right for 802.1x/WPA */ 1922 ieee80211_node_authorize(ni); 1923 } 1924 return ni; 1925 } 1926 1927 #define IS_PROBEREQ(wh) \ 1928 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1929 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1930 #define IS_BCAST_PROBEREQ(wh) \ 1931 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1932 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1933 1934 static __inline struct ieee80211_node * 1935 _find_rxnode(struct ieee80211_node_table *nt, 1936 const struct ieee80211_frame_min *wh) 1937 { 1938 if (IS_BCAST_PROBEREQ(wh)) 1939 return NULL; /* spam bcast probe req to all vap's */ 1940 return ieee80211_find_node_locked(nt, wh->i_addr2); 1941 } 1942 1943 /* 1944 * Locate the node for sender, track state, and then pass the 1945 * (referenced) node up to the 802.11 layer for its use. Note 1946 * we can return NULL if the sender is not in the table. 1947 */ 1948 struct ieee80211_node * 1949 #ifdef IEEE80211_DEBUG_REFCNT 1950 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1951 const struct ieee80211_frame_min *wh, const char *func, int line) 1952 #else 1953 ieee80211_find_rxnode(struct ieee80211com *ic, 1954 const struct ieee80211_frame_min *wh) 1955 #endif 1956 { 1957 struct ieee80211_node_table *nt; 1958 struct ieee80211_node *ni; 1959 1960 nt = &ic->ic_sta; 1961 IEEE80211_NODE_LOCK(nt); 1962 ni = _find_rxnode(nt, wh); 1963 IEEE80211_NODE_UNLOCK(nt); 1964 1965 return ni; 1966 } 1967 1968 /* 1969 * Like ieee80211_find_rxnode but use the supplied h/w 1970 * key index as a hint to locate the node in the key 1971 * mapping table. If an entry is present at the key 1972 * index we return it; otherwise do a normal lookup and 1973 * update the mapping table if the station has a unicast 1974 * key assigned to it. 1975 */ 1976 struct ieee80211_node * 1977 #ifdef IEEE80211_DEBUG_REFCNT 1978 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1979 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1980 const char *func, int line) 1981 #else 1982 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1983 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1984 #endif 1985 { 1986 struct ieee80211_node_table *nt; 1987 struct ieee80211_node *ni; 1988 1989 nt = &ic->ic_sta; 1990 IEEE80211_NODE_LOCK(nt); 1991 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1992 ni = nt->nt_keyixmap[keyix]; 1993 else 1994 ni = NULL; 1995 if (ni == NULL) { 1996 ni = _find_rxnode(nt, wh); 1997 if (ni != NULL && nt->nt_keyixmap != NULL) { 1998 /* 1999 * If the station has a unicast key cache slot 2000 * assigned update the key->node mapping table. 2001 */ 2002 keyix = ni->ni_ucastkey.wk_rxkeyix; 2003 /* XXX can keyixmap[keyix] != NULL? */ 2004 if (keyix < nt->nt_keyixmax && 2005 nt->nt_keyixmap[keyix] == NULL) { 2006 IEEE80211_DPRINTF(ni->ni_vap, 2007 IEEE80211_MSG_NODE, 2008 "%s: add key map entry %p<%s> refcnt %d\n", 2009 __func__, ni, ether_sprintf(ni->ni_macaddr), 2010 ieee80211_node_refcnt(ni)+1); 2011 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 2012 } 2013 } 2014 } else { 2015 if (IS_BCAST_PROBEREQ(wh)) 2016 ni = NULL; /* spam bcast probe req to all vap's */ 2017 else 2018 ieee80211_ref_node(ni); 2019 } 2020 IEEE80211_NODE_UNLOCK(nt); 2021 2022 return ni; 2023 } 2024 #undef IS_BCAST_PROBEREQ 2025 #undef IS_PROBEREQ 2026 2027 /* 2028 * Return a reference to the appropriate node for sending 2029 * a data frame. This handles node discovery in adhoc networks. 2030 */ 2031 struct ieee80211_node * 2032 #ifdef IEEE80211_DEBUG_REFCNT 2033 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 2034 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2035 const char *func, int line) 2036 #else 2037 ieee80211_find_txnode(struct ieee80211vap *vap, 2038 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 2039 #endif 2040 { 2041 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2042 struct ieee80211_node *ni; 2043 2044 /* 2045 * The destination address should be in the node table 2046 * unless this is a multicast/broadcast frame. We can 2047 * also optimize station mode operation, all frames go 2048 * to the bss node. 2049 */ 2050 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2051 IEEE80211_NODE_LOCK(nt); 2052 if (vap->iv_opmode == IEEE80211_M_STA || 2053 vap->iv_opmode == IEEE80211_M_WDS || 2054 IEEE80211_IS_MULTICAST(macaddr)) 2055 ni = ieee80211_ref_node(vap->iv_bss); 2056 else 2057 ni = ieee80211_find_node_locked(nt, macaddr); 2058 IEEE80211_NODE_UNLOCK(nt); 2059 2060 if (ni == NULL) { 2061 if (vap->iv_opmode == IEEE80211_M_IBSS || 2062 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2063 /* 2064 * In adhoc mode cons up a node for the destination. 2065 * Note that we need an additional reference for the 2066 * caller to be consistent with 2067 * ieee80211_find_node_locked. 2068 */ 2069 /* 2070 * XXX TODO: this doesn't fake up 11n state; we need 2071 * to find another way to get it upgraded. 2072 */ 2073 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2074 if (ni != NULL) 2075 (void) ieee80211_ref_node(ni); 2076 } else { 2077 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2078 "no node, discard frame (%s)", __func__); 2079 vap->iv_stats.is_tx_nonode++; 2080 } 2081 } 2082 return ni; 2083 } 2084 2085 static void 2086 _ieee80211_free_node(struct ieee80211_node *ni) 2087 { 2088 struct ieee80211_node_table *nt = ni->ni_table; 2089 2090 /* 2091 * NB: careful about referencing the vap as it may be 2092 * gone if the last reference was held by a driver. 2093 * We know the com will always be present so it's safe 2094 * to use ni_ic below to reclaim resources. 2095 */ 2096 #if 0 2097 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2098 "%s %p<%s> in %s table\n", __func__, ni, 2099 ether_sprintf(ni->ni_macaddr), 2100 nt != NULL ? nt->nt_name : "<gone>"); 2101 #endif 2102 if (ni->ni_associd != 0) { 2103 struct ieee80211vap *vap = ni->ni_vap; 2104 if (vap->iv_aid_bitmap != NULL) 2105 IEEE80211_AID_CLR(vap, ni->ni_associd); 2106 } 2107 if (nt != NULL) 2108 ieee80211_del_node_nt(nt, ni); 2109 ni->ni_ic->ic_node_free(ni); 2110 } 2111 2112 /* 2113 * Clear any entry in the unicast key mapping table. 2114 */ 2115 static int 2116 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2117 { 2118 ieee80211_keyix keyix; 2119 2120 keyix = ni->ni_ucastkey.wk_rxkeyix; 2121 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2122 nt->nt_keyixmap[keyix] == ni) { 2123 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2124 "%s: %p<%s> clear key map entry %u\n", 2125 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2126 nt->nt_keyixmap[keyix] = NULL; 2127 ieee80211_node_decref(ni); 2128 return 1; 2129 } 2130 2131 return 0; 2132 } 2133 2134 void 2135 #ifdef IEEE80211_DEBUG_REFCNT 2136 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 2137 #else 2138 ieee80211_free_node(struct ieee80211_node *ni) 2139 #endif 2140 { 2141 struct ieee80211_node_table *nt = ni->ni_table; 2142 2143 #ifdef IEEE80211_DEBUG_REFCNT 2144 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2145 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2146 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2147 #endif 2148 if (nt != NULL) { 2149 IEEE80211_NODE_LOCK(nt); 2150 if (ieee80211_node_dectestref(ni)) { 2151 /* 2152 * Last reference, reclaim state. 2153 */ 2154 _ieee80211_free_node(ni); 2155 } else if (ieee80211_node_refcnt(ni) == 1) 2156 if (node_clear_keyixmap(nt, ni)) 2157 _ieee80211_free_node(ni); 2158 IEEE80211_NODE_UNLOCK(nt); 2159 } else { 2160 if (ieee80211_node_dectestref(ni)) 2161 _ieee80211_free_node(ni); 2162 } 2163 } 2164 2165 /* 2166 * Reclaim a unicast key and clear any key cache state. 2167 */ 2168 int 2169 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2170 { 2171 struct ieee80211com *ic = ni->ni_ic; 2172 struct ieee80211_node_table *nt = &ic->ic_sta; 2173 struct ieee80211_node *nikey; 2174 ieee80211_keyix keyix; 2175 int isowned, status; 2176 2177 /* 2178 * NB: We must beware of LOR here; deleting the key 2179 * can cause the crypto layer to block traffic updates 2180 * which can generate a LOR against the node table lock; 2181 * grab it here and stash the key index for our use below. 2182 * 2183 * Must also beware of recursion on the node table lock. 2184 * When called from node_cleanup we may already have 2185 * the node table lock held. Unfortunately there's no 2186 * way to separate out this path so we must do this 2187 * conditionally. 2188 */ 2189 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2190 if (!isowned) 2191 IEEE80211_NODE_LOCK(nt); 2192 nikey = NULL; 2193 status = 1; /* NB: success */ 2194 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2195 keyix = ni->ni_ucastkey.wk_rxkeyix; 2196 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2197 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2198 nikey = nt->nt_keyixmap[keyix]; 2199 nt->nt_keyixmap[keyix] = NULL; 2200 } 2201 } 2202 if (!isowned) 2203 IEEE80211_NODE_UNLOCK(nt); 2204 2205 if (nikey != NULL) { 2206 KASSERT(nikey == ni, 2207 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2208 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2209 "%s: delete key map entry %p<%s> refcnt %d\n", 2210 __func__, ni, ether_sprintf(ni->ni_macaddr), 2211 ieee80211_node_refcnt(ni)-1); 2212 ieee80211_free_node(ni); 2213 } 2214 return status; 2215 } 2216 2217 /* 2218 * Reclaim a node. If this is the last reference count then 2219 * do the normal free work. Otherwise remove it from the node 2220 * table and mark it gone by clearing the back-reference. 2221 */ 2222 static void 2223 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2224 { 2225 2226 IEEE80211_NODE_LOCK_ASSERT(nt); 2227 2228 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2229 "%s: remove %p<%s> from %s table, refcnt %d\n", 2230 __func__, ni, ether_sprintf(ni->ni_macaddr), 2231 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2232 /* 2233 * Clear any entry in the unicast key mapping table. 2234 * We need to do it here so rx lookups don't find it 2235 * in the mapping table even if it's not in the hash 2236 * table. We cannot depend on the mapping table entry 2237 * being cleared because the node may not be free'd. 2238 */ 2239 (void)node_clear_keyixmap(nt, ni); 2240 if (!ieee80211_node_dectestref(ni)) { 2241 /* 2242 * Other references are present, just remove the 2243 * node from the table so it cannot be found. When 2244 * the references are dropped storage will be 2245 * reclaimed. 2246 */ 2247 ieee80211_del_node_nt(nt, ni); 2248 } else 2249 _ieee80211_free_node(ni); 2250 } 2251 2252 /* 2253 * Node table support. 2254 */ 2255 2256 static void 2257 ieee80211_node_table_init(struct ieee80211com *ic, 2258 struct ieee80211_node_table *nt, 2259 const char *name, int inact, int keyixmax) 2260 { 2261 2262 nt->nt_ic = ic; 2263 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2264 TAILQ_INIT(&nt->nt_node); 2265 nt->nt_count = 0; 2266 nt->nt_name = name; 2267 nt->nt_inact_init = inact; 2268 nt->nt_keyixmax = keyixmax; 2269 if (nt->nt_keyixmax > 0) { 2270 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2271 keyixmax * sizeof(struct ieee80211_node *), 2272 M_80211_NODE, 2273 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2274 if (nt->nt_keyixmap == NULL) 2275 ic_printf(ic, 2276 "Cannot allocate key index map with %u entries\n", 2277 keyixmax); 2278 } else 2279 nt->nt_keyixmap = NULL; 2280 } 2281 2282 static void 2283 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2284 struct ieee80211vap *match) 2285 { 2286 struct ieee80211_node *ni, *next; 2287 2288 IEEE80211_NODE_LOCK(nt); 2289 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2290 if (match != NULL && ni->ni_vap != match) 2291 continue; 2292 /* XXX can this happen? if so need's work */ 2293 if (ni->ni_associd != 0) { 2294 struct ieee80211vap *vap = ni->ni_vap; 2295 2296 if (vap->iv_auth->ia_node_leave != NULL) 2297 vap->iv_auth->ia_node_leave(ni); 2298 if (vap->iv_aid_bitmap != NULL) 2299 IEEE80211_AID_CLR(vap, ni->ni_associd); 2300 } 2301 ni->ni_wdsvap = NULL; /* clear reference */ 2302 node_reclaim(nt, ni); 2303 } 2304 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2305 /* 2306 * Make a separate pass to clear references to this vap 2307 * held by DWDS entries. They will not be matched above 2308 * because ni_vap will point to the ap vap but we still 2309 * need to clear ni_wdsvap when the WDS vap is destroyed 2310 * and/or reset. 2311 */ 2312 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2313 if (ni->ni_wdsvap == match) 2314 ni->ni_wdsvap = NULL; 2315 } 2316 IEEE80211_NODE_UNLOCK(nt); 2317 } 2318 2319 static void 2320 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2321 { 2322 ieee80211_node_table_reset(nt, NULL); 2323 if (nt->nt_keyixmap != NULL) { 2324 #ifdef DIAGNOSTIC 2325 /* XXX verify all entries are NULL */ 2326 int i; 2327 for (i = 0; i < nt->nt_keyixmax; i++) 2328 if (nt->nt_keyixmap[i] != NULL) 2329 printf("%s: %s[%u] still active\n", __func__, 2330 nt->nt_name, i); 2331 #endif 2332 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2333 nt->nt_keyixmap = NULL; 2334 } 2335 IEEE80211_NODE_LOCK_DESTROY(nt); 2336 } 2337 2338 static void 2339 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2340 { 2341 struct ieee80211com *ic = ni->ni_ic; 2342 struct ieee80211vap *vap = ni->ni_vap; 2343 2344 /* 2345 * Only process stations when in RUN state. This 2346 * insures, for example, that we don't timeout an 2347 * inactive station during CAC. Note that CSA state 2348 * is actually handled in ieee80211_node_timeout as 2349 * it applies to more than timeout processing. 2350 */ 2351 if (vap->iv_state != IEEE80211_S_RUN) 2352 return; 2353 /* 2354 * Ignore entries for which have yet to receive an 2355 * authentication frame. These are transient and 2356 * will be reclaimed when the last reference to them 2357 * goes away (when frame xmits complete). 2358 */ 2359 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2360 vap->iv_opmode == IEEE80211_M_STA) && 2361 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2362 return; 2363 /* 2364 * Free fragment if not needed anymore 2365 * (last fragment older than 1s). 2366 * XXX doesn't belong here, move to node_age 2367 */ 2368 if (ni->ni_rxfrag[0] != NULL && 2369 ticks > ni->ni_rxfragstamp + hz) { 2370 m_freem(ni->ni_rxfrag[0]); 2371 ni->ni_rxfrag[0] = NULL; 2372 } 2373 if (ni->ni_inact > 0) { 2374 ni->ni_inact--; 2375 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2376 "%s: inact %u inact_reload %u nrates %u", 2377 __func__, ni->ni_inact, ni->ni_inact_reload, 2378 ni->ni_rates.rs_nrates); 2379 } 2380 /* 2381 * Special case ourself; we may be idle for extended periods 2382 * of time and regardless reclaiming our state is wrong. 2383 * XXX run ic_node_age 2384 */ 2385 /* XXX before inact decrement? */ 2386 if (ni == vap->iv_bss) 2387 return; 2388 if (ni->ni_associd != 0 || 2389 (vap->iv_opmode == IEEE80211_M_IBSS || 2390 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2391 /* 2392 * Age/drain resources held by the station. 2393 */ 2394 ic->ic_node_age(ni); 2395 /* 2396 * Probe the station before time it out. We 2397 * send a null data frame which may not be 2398 * universally supported by drivers (need it 2399 * for ps-poll support so it should be...). 2400 * 2401 * XXX don't probe the station unless we've 2402 * received a frame from them (and have 2403 * some idea of the rates they are capable 2404 * of); this will get fixed more properly 2405 * soon with better handling of the rate set. 2406 */ 2407 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2408 (0 < ni->ni_inact && 2409 ni->ni_inact <= vap->iv_inact_probe) && 2410 ni->ni_rates.rs_nrates != 0) { 2411 IEEE80211_NOTE(vap, 2412 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2413 ni, "%s", 2414 "probe station due to inactivity"); 2415 /* 2416 * Grab a reference so the node cannot 2417 * be reclaimed before we send the frame. 2418 * ieee80211_send_nulldata understands 2419 * we've done this and reclaims the 2420 * ref for us as needed. 2421 */ 2422 /* XXX fix this (not required anymore). */ 2423 ieee80211_ref_node(ni); 2424 /* XXX useless */ 2425 ieee80211_send_nulldata(ni); 2426 /* XXX stat? */ 2427 return; 2428 } 2429 } 2430 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2431 ni->ni_inact <= 0) { 2432 IEEE80211_NOTE(vap, 2433 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2434 "station timed out due to inactivity " 2435 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2436 /* 2437 * Send a deauthenticate frame and drop the station. 2438 * This is somewhat complicated due to reference counts 2439 * and locking. At this point a station will typically 2440 * have a reference count of 2. ieee80211_node_leave 2441 * will do a "free" of the node which will drop the 2442 * reference count. But in the meantime a reference 2443 * wil be held by the deauth frame. The actual reclaim 2444 * of the node will happen either after the tx is 2445 * completed or by ieee80211_node_leave. 2446 */ 2447 if (ni->ni_associd != 0) { 2448 IEEE80211_SEND_MGMT(ni, 2449 IEEE80211_FC0_SUBTYPE_DEAUTH, 2450 IEEE80211_REASON_AUTH_EXPIRE); 2451 } 2452 ieee80211_node_leave(ni); 2453 vap->iv_stats.is_node_timeout++; 2454 } 2455 } 2456 2457 /* 2458 * Timeout inactive stations and do related housekeeping. 2459 */ 2460 static void 2461 ieee80211_timeout_stations(struct ieee80211com *ic) 2462 { 2463 struct ieee80211_node_table *nt = &ic->ic_sta; 2464 2465 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2466 } 2467 2468 /* 2469 * Aggressively reclaim resources. This should be used 2470 * only in a critical situation to reclaim mbuf resources. 2471 */ 2472 void 2473 ieee80211_drain(struct ieee80211com *ic) 2474 { 2475 struct ieee80211_node_table *nt = &ic->ic_sta; 2476 struct ieee80211vap *vap; 2477 struct ieee80211_node *ni; 2478 2479 IEEE80211_NODE_LOCK(nt); 2480 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2481 /* 2482 * Ignore entries for which have yet to receive an 2483 * authentication frame. These are transient and 2484 * will be reclaimed when the last reference to them 2485 * goes away (when frame xmits complete). 2486 */ 2487 vap = ni->ni_vap; 2488 /* 2489 * Only process stations when in RUN state. This 2490 * insures, for example, that we don't timeout an 2491 * inactive station during CAC. Note that CSA state 2492 * is actually handled in ieee80211_node_timeout as 2493 * it applies to more than timeout processing. 2494 */ 2495 if (vap->iv_state != IEEE80211_S_RUN) 2496 continue; 2497 /* XXX can vap be NULL? */ 2498 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2499 vap->iv_opmode == IEEE80211_M_STA) && 2500 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2501 continue; 2502 /* 2503 * Free fragments. 2504 * XXX doesn't belong here, move to node_drain 2505 */ 2506 if (ni->ni_rxfrag[0] != NULL) { 2507 m_freem(ni->ni_rxfrag[0]); 2508 ni->ni_rxfrag[0] = NULL; 2509 } 2510 /* 2511 * Drain resources held by the station. 2512 */ 2513 ic->ic_node_drain(ni); 2514 } 2515 IEEE80211_NODE_UNLOCK(nt); 2516 } 2517 2518 /* 2519 * Per-ieee80211vap inactivity timer callback. 2520 */ 2521 static void 2522 ieee80211_vap_timeout(struct ieee80211vap *vap) 2523 { 2524 2525 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2526 2527 ieee80211_vap_erp_timeout(vap); 2528 ieee80211_ht_timeout(vap); 2529 ieee80211_vht_timeout(vap); 2530 } 2531 2532 /* 2533 * Per-ieee80211com inactivity timer callback. 2534 */ 2535 void 2536 ieee80211_node_timeout(void *arg) 2537 { 2538 struct ieee80211com *ic = arg; 2539 struct ieee80211vap *vap; 2540 2541 /* 2542 * Defer timeout processing if a channel switch is pending. 2543 * We typically need to be mute so not doing things that 2544 * might generate frames is good to handle in one place. 2545 * Suppressing the station timeout processing may extend the 2546 * lifetime of inactive stations (by not decrementing their 2547 * idle counters) but this should be ok unless the CSA is 2548 * active for an unusually long time. 2549 */ 2550 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2551 ieee80211_scan_timeout(ic); 2552 ieee80211_timeout_stations(ic); 2553 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2554 2555 IEEE80211_LOCK(ic); 2556 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2557 ieee80211_vap_timeout(vap); 2558 IEEE80211_UNLOCK(ic); 2559 } 2560 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2561 ieee80211_node_timeout, ic); 2562 } 2563 2564 /* 2565 * The same as ieee80211_iterate_nodes(), but for one vap only. 2566 */ 2567 int 2568 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2569 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2570 { 2571 struct ieee80211_node **ni_arr; 2572 struct ieee80211_node *ni; 2573 size_t size; 2574 int count, i; 2575 2576 /* 2577 * Iterate over the node table and save an array of ref'ed nodes. 2578 * 2579 * This is separated out from calling the actual node function so that 2580 * no LORs will occur. 2581 */ 2582 IEEE80211_NODE_LOCK(nt); 2583 count = nt->nt_count; 2584 size = count * sizeof(struct ieee80211_node *); 2585 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2586 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2587 if (ni_arr == NULL) { 2588 IEEE80211_NODE_UNLOCK(nt); 2589 return (ENOMEM); 2590 } 2591 2592 i = 0; 2593 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2594 if (vap != NULL && ni->ni_vap != vap) 2595 continue; 2596 KASSERT(i < count, 2597 ("node array overflow (vap %p, i %d, count %d)\n", 2598 vap, i, count)); 2599 ni_arr[i] = ieee80211_ref_node(ni); 2600 i++; 2601 } 2602 IEEE80211_NODE_UNLOCK(nt); 2603 2604 for (i = 0; i < count; i++) { 2605 if (ni_arr[i] == NULL) /* end of the list */ 2606 break; 2607 (*f)(arg, ni_arr[i]); 2608 /* ieee80211_free_node() locks by itself */ 2609 ieee80211_free_node(ni_arr[i]); 2610 } 2611 2612 IEEE80211_FREE(ni_arr, M_80211_NODE); 2613 2614 return (0); 2615 } 2616 2617 /* 2618 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2619 * reference in the source. 2620 */ 2621 void 2622 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2623 ieee80211_iter_func *f, void *arg) 2624 { 2625 /* XXX no way to pass error to the caller. */ 2626 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2627 } 2628 2629 void 2630 ieee80211_dump_node(struct ieee80211_node_table *nt __unused, 2631 struct ieee80211_node *ni) 2632 { 2633 printf("%p: mac %s refcnt %d\n", ni, 2634 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2635 printf("\tauthmode %u flags 0x%x\n", 2636 ni->ni_authmode, ni->ni_flags); 2637 printf("\tassocid 0x%x txpower %u vlan %u\n", 2638 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2639 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2640 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2641 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2642 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2643 ni->ni_rxfragstamp); 2644 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2645 node_getrssi(ni), ni->ni_noise, 2646 ni->ni_intval, ni->ni_capinfo); 2647 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2648 ether_sprintf(ni->ni_bssid), 2649 ni->ni_esslen, ni->ni_essid, 2650 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2651 printf("\tinact %u inact_reload %u txrate %u\n", 2652 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2653 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2654 ni->ni_htcap, ni->ni_htparam, 2655 ni->ni_htctlchan, ni->ni_ht2ndchan); 2656 printf("\thtopmode %x htstbc %x htchw %u\n", 2657 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2658 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2659 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2660 (int) ni->ni_vht_basicmcs); 2661 /* XXX VHT state */ 2662 } 2663 2664 void 2665 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2666 { 2667 ieee80211_iterate_nodes(nt, 2668 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2669 } 2670 2671 /* 2672 * Iterate over the VAPs and update their ERP beacon IEs. 2673 * 2674 * Note this must be called from the deferred ERP update task paths. 2675 */ 2676 void 2677 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2678 { 2679 struct ieee80211vap *vap; 2680 2681 IEEE80211_LOCK_ASSERT(ic); 2682 2683 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2684 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2685 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2686 } 2687 2688 /* 2689 * Handle a station joining an 11g network. 2690 */ 2691 static void 2692 ieee80211_node_join_11g(struct ieee80211_node *ni) 2693 { 2694 struct ieee80211com *ic = ni->ni_ic; 2695 struct ieee80211vap *vap = ni->ni_vap; 2696 2697 IEEE80211_LOCK_ASSERT(ic); 2698 2699 /* 2700 * Station isn't capable of short slot time. Bump 2701 * the count of long slot time stations and disable 2702 * use of short slot time. Note that the actual switch 2703 * over to long slot time use may not occur until the 2704 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2705 */ 2706 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2707 vap->iv_longslotsta++; 2708 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2709 "station needs long slot time, count %d", 2710 vap->iv_longslotsta); 2711 /* 2712 * XXX TODO: this may need all VAPs checked! 2713 */ 2714 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2715 /* 2716 * Don't force slot time when switched to turbo 2717 * mode as non-ERP stations won't be present; this 2718 * need only be done when on the normal G channel. 2719 */ 2720 ieee80211_vap_set_shortslottime(vap, 0); 2721 } 2722 } 2723 /* 2724 * If the new station is not an ERP station 2725 * then bump the counter and enable protection 2726 * if configured. 2727 */ 2728 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2729 vap->iv_nonerpsta++; 2730 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2731 "station is !ERP, %d non-ERP stations associated", 2732 vap->iv_nonerpsta); 2733 /* 2734 * If station does not support short preamble 2735 * then we must enable use of Barker preamble. 2736 */ 2737 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2738 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2739 "%s", "station needs long preamble"); 2740 vap->iv_flags |= IEEE80211_F_USEBARKER; 2741 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; 2742 ieee80211_vap_update_preamble(vap); 2743 } 2744 /* 2745 * If protection is configured and this is the first 2746 * indication we should use protection, enable it. 2747 */ 2748 if (vap->iv_protmode != IEEE80211_PROT_NONE && 2749 vap->iv_nonerpsta == 1 && 2750 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2751 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2752 "%s: enable use of protection\n", __func__); 2753 vap->iv_flags |= IEEE80211_F_USEPROT; 2754 ieee80211_vap_update_erp_protmode(vap); 2755 } 2756 } else 2757 ni->ni_flags |= IEEE80211_NODE_ERP; 2758 } 2759 2760 void 2761 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2762 { 2763 struct ieee80211com *ic = ni->ni_ic; 2764 struct ieee80211vap *vap = ni->ni_vap; 2765 int newassoc; 2766 2767 if (ni->ni_associd == 0) { 2768 uint16_t aid; 2769 2770 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2771 /* 2772 * It would be good to search the bitmap 2773 * more efficiently, but this will do for now. 2774 */ 2775 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2776 if (!IEEE80211_AID_ISSET(vap, aid)) 2777 break; 2778 } 2779 if (aid >= vap->iv_max_aid) { 2780 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2781 ieee80211_node_leave(ni); 2782 return; 2783 } 2784 ni->ni_associd = aid | 0xc000; 2785 ni->ni_jointime = time_uptime; 2786 IEEE80211_LOCK(ic); 2787 IEEE80211_AID_SET(vap, ni->ni_associd); 2788 vap->iv_sta_assoc++; 2789 2790 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2791 ieee80211_ht_node_join(ni); 2792 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2793 ieee80211_vht_node_join(ni); 2794 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2795 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2796 ieee80211_node_join_11g(ni); 2797 IEEE80211_UNLOCK(ic); 2798 2799 newassoc = 1; 2800 } else 2801 newassoc = 0; 2802 2803 /* 2804 * XXX VHT - should log VHT channel width, etc 2805 */ 2806 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2807 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 2808 IEEE80211_NODE_AID(ni), 2809 vap->iv_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2810 vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2811 vap->iv_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2812 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2813 /* XXX update for VHT string */ 2814 ni->ni_flags & IEEE80211_NODE_HT ? 2815 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2816 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2817 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 2818 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2819 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2820 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2821 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2822 ", fast-frames" : "", 2823 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2824 ", turbo" : "" 2825 ); 2826 2827 ieee80211_node_setuptxparms(ni); 2828 ieee80211_ratectl_node_init(ni); 2829 /* give driver a chance to setup state like ni_txrate */ 2830 if (ic->ic_newassoc != NULL) 2831 ic->ic_newassoc(ni, newassoc); 2832 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2833 /* tell the authenticator about new station */ 2834 if (vap->iv_auth->ia_node_join != NULL) 2835 vap->iv_auth->ia_node_join(ni); 2836 ieee80211_notify_node_join(ni, 2837 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2838 } 2839 2840 static void 2841 disable_protection(struct ieee80211vap *vap) 2842 { 2843 struct ieee80211com *ic = vap->iv_ic; 2844 2845 KASSERT(vap->iv_nonerpsta == 0 && 2846 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2847 ("%d non ERP stations, flags 0x%x", vap->iv_nonerpsta, 2848 vap->iv_flags_ext)); 2849 2850 vap->iv_flags &= ~IEEE80211_F_USEPROT; 2851 /* XXX verify mode? */ 2852 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2853 vap->iv_flags |= IEEE80211_F_SHPREAMBLE; 2854 vap->iv_flags &= ~IEEE80211_F_USEBARKER; 2855 } 2856 ieee80211_vap_update_erp_protmode(vap); 2857 ieee80211_vap_update_preamble(vap); 2858 } 2859 2860 /* 2861 * Handle a station leaving an 11g network. 2862 */ 2863 static void 2864 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2865 { 2866 struct ieee80211com *ic = ni->ni_ic; 2867 struct ieee80211vap *vap = ni->ni_vap; 2868 2869 IEEE80211_LOCK_ASSERT(ic); 2870 2871 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2872 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2873 ic->ic_bsschan->ic_flags)); 2874 2875 /* 2876 * If a long slot station do the slot time bookkeeping. 2877 */ 2878 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2879 KASSERT(vap->iv_longslotsta > 0, 2880 ("bogus long slot station count %d", vap->iv_longslotsta)); 2881 vap->iv_longslotsta--; 2882 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2883 "long slot time station leaves, count now %d", 2884 vap->iv_longslotsta); 2885 /* 2886 * XXX TODO: this may need all VAPs checked! 2887 */ 2888 if (vap->iv_longslotsta == 0) { 2889 /* 2890 * Re-enable use of short slot time if supported 2891 * and not operating in IBSS mode (per spec). 2892 */ 2893 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2894 ic->ic_opmode != IEEE80211_M_IBSS) { 2895 IEEE80211_DPRINTF(ni->ni_vap, 2896 IEEE80211_MSG_ASSOC, 2897 "%s: re-enable use of short slot time\n", 2898 __func__); 2899 ieee80211_vap_set_shortslottime(vap, 1); 2900 } 2901 } 2902 } 2903 /* 2904 * If a non-ERP station do the protection-related bookkeeping. 2905 */ 2906 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2907 KASSERT(vap->iv_nonerpsta > 0, 2908 ("bogus non-ERP station count %d", vap->iv_nonerpsta)); 2909 vap->iv_nonerpsta--; 2910 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2911 "non-ERP station leaves, count now %d%s", vap->iv_nonerpsta, 2912 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2913 " (non-ERP sta present)" : ""); 2914 if (vap->iv_nonerpsta == 0 && 2915 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2916 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2917 "%s: disable use of protection\n", __func__); 2918 disable_protection(vap); 2919 } 2920 } 2921 } 2922 2923 /* 2924 * Time out presence of an overlapping bss with non-ERP 2925 * stations. When operating in hostap mode we listen for 2926 * beacons from other stations and if we identify a non-ERP 2927 * station is present we enable protection. To identify 2928 * when all non-ERP stations are gone we time out this 2929 * condition. 2930 */ 2931 static void 2932 ieee80211_vap_erp_timeout(struct ieee80211vap *vap) 2933 { 2934 2935 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2936 2937 if ((vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2938 ieee80211_time_after(ticks, vap->iv_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2939 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 2940 "%s", "age out non-ERP sta present on channel"); 2941 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2942 if (vap->iv_nonerpsta == 0) 2943 disable_protection(vap); 2944 } 2945 } 2946 2947 /* 2948 * Handle bookkeeping for station deauthentication/disassociation 2949 * when operating as an ap. 2950 */ 2951 void 2952 ieee80211_node_leave(struct ieee80211_node *ni) 2953 { 2954 struct ieee80211com *ic = ni->ni_ic; 2955 struct ieee80211vap *vap = ni->ni_vap; 2956 struct ieee80211_node_table *nt = ni->ni_table; 2957 2958 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2959 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2960 2961 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2962 ("unexpected operating mode %u", vap->iv_opmode)); 2963 /* 2964 * If node wasn't previously associated all 2965 * we need to do is reclaim the reference. 2966 */ 2967 /* XXX ibss mode bypasses 11g and notification */ 2968 if (ni->ni_associd == 0) 2969 goto done; 2970 /* 2971 * Tell the authenticator the station is leaving. 2972 * Note that we must do this before yanking the 2973 * association id as the authenticator uses the 2974 * associd to locate it's state block. 2975 */ 2976 if (vap->iv_auth->ia_node_leave != NULL) 2977 vap->iv_auth->ia_node_leave(ni); 2978 2979 IEEE80211_LOCK(ic); 2980 IEEE80211_AID_CLR(vap, ni->ni_associd); 2981 vap->iv_sta_assoc--; 2982 2983 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2984 ieee80211_vht_node_leave(ni); 2985 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2986 ieee80211_ht_node_leave(ni); 2987 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2988 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2989 ieee80211_node_leave_11g(ni); 2990 IEEE80211_UNLOCK(ic); 2991 /* 2992 * Cleanup station state. In particular clear various 2993 * state that might otherwise be reused if the node 2994 * is reused before the reference count goes to zero 2995 * (and memory is reclaimed). 2996 */ 2997 ieee80211_sta_leave(ni); 2998 done: 2999 /* 3000 * Remove the node from any table it's recorded in and 3001 * drop the caller's reference. Removal from the table 3002 * is important to insure the node is not reprocessed 3003 * for inactivity. 3004 */ 3005 if (nt != NULL) { 3006 IEEE80211_NODE_LOCK(nt); 3007 node_reclaim(nt, ni); 3008 IEEE80211_NODE_UNLOCK(nt); 3009 } else 3010 ieee80211_free_node(ni); 3011 } 3012 3013 struct rssiinfo { 3014 int rssi_samples; 3015 uint32_t rssi_total; 3016 }; 3017 3018 static void 3019 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 3020 { 3021 struct rssiinfo *info = arg; 3022 struct ieee80211vap *vap = ni->ni_vap; 3023 int8_t rssi; 3024 3025 /* only associated stations */ 3026 if (ni->ni_associd == 0) 3027 return; 3028 rssi = vap->iv_ic->ic_node_getrssi(ni); 3029 if (rssi != 0) { 3030 info->rssi_samples++; 3031 info->rssi_total += rssi; 3032 } 3033 } 3034 3035 static void 3036 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 3037 { 3038 struct rssiinfo *info = arg; 3039 struct ieee80211vap *vap = ni->ni_vap; 3040 int8_t rssi; 3041 3042 /* only neighbors */ 3043 /* XXX check bssid */ 3044 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 3045 return; 3046 rssi = vap->iv_ic->ic_node_getrssi(ni); 3047 if (rssi != 0) { 3048 info->rssi_samples++; 3049 info->rssi_total += rssi; 3050 } 3051 } 3052 3053 #ifdef IEEE80211_SUPPORT_MESH 3054 static void 3055 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3056 { 3057 struct rssiinfo *info = arg; 3058 struct ieee80211vap *vap = ni->ni_vap; 3059 int8_t rssi; 3060 3061 /* only neighbors that peered successfully */ 3062 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3063 return; 3064 rssi = vap->iv_ic->ic_node_getrssi(ni); 3065 if (rssi != 0) { 3066 info->rssi_samples++; 3067 info->rssi_total += rssi; 3068 } 3069 } 3070 #endif /* IEEE80211_SUPPORT_MESH */ 3071 3072 int8_t 3073 ieee80211_getrssi(struct ieee80211vap *vap) 3074 { 3075 #define NZ(x) ((x) == 0 ? 1 : (x)) 3076 struct ieee80211com *ic = vap->iv_ic; 3077 struct rssiinfo info; 3078 3079 info.rssi_total = 0; 3080 info.rssi_samples = 0; 3081 switch (vap->iv_opmode) { 3082 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3083 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3084 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3085 &info); 3086 break; 3087 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3088 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3089 &info); 3090 break; 3091 #ifdef IEEE80211_SUPPORT_MESH 3092 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3093 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3094 &info); 3095 break; 3096 #endif 3097 case IEEE80211_M_MONITOR: /* XXX */ 3098 case IEEE80211_M_STA: /* use stats from associated ap */ 3099 default: 3100 if (vap->iv_bss != NULL) 3101 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3102 info.rssi_samples = 1; 3103 break; 3104 } 3105 return info.rssi_total / NZ(info.rssi_samples); 3106 #undef NZ 3107 } 3108 3109 void 3110 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3111 { 3112 3113 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3114 return; 3115 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3116 /* for non-station mode return avg'd rssi accounting */ 3117 if (vap->iv_opmode != IEEE80211_M_STA) 3118 *rssi = ieee80211_getrssi(vap); 3119 } 3120