1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 Atsushi Onoe 5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_wlan.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/mbuf.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 40 #include <sys/socket.h> 41 42 #include <net/if.h> 43 #include <net/if_var.h> 44 #include <net/if_media.h> 45 #include <net/ethernet.h> 46 47 #include <net80211/ieee80211_var.h> 48 #include <net80211/ieee80211_input.h> 49 #ifdef IEEE80211_SUPPORT_SUPERG 50 #include <net80211/ieee80211_superg.h> 51 #endif 52 #ifdef IEEE80211_SUPPORT_TDMA 53 #include <net80211/ieee80211_tdma.h> 54 #endif 55 #include <net80211/ieee80211_wds.h> 56 #include <net80211/ieee80211_mesh.h> 57 #include <net80211/ieee80211_ratectl.h> 58 #include <net80211/ieee80211_vht.h> 59 60 #include <net/bpf.h> 61 62 /* 63 * IEEE80211_NODE_HASHSIZE must be a power of 2. 64 */ 65 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 66 67 /* 68 * Association id's are managed with a bit vector. 69 */ 70 #define IEEE80211_AID_SET(_vap, b) \ 71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 72 (1 << (IEEE80211_AID(b) % 32))) 73 #define IEEE80211_AID_CLR(_vap, b) \ 74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 75 ~(1 << (IEEE80211_AID(b) % 32))) 76 #define IEEE80211_AID_ISSET(_vap, b) \ 77 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 78 79 static int ieee80211_sta_join1(struct ieee80211_node *); 80 81 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 82 const uint8_t [IEEE80211_ADDR_LEN]); 83 static void node_cleanup(struct ieee80211_node *); 84 static void node_free(struct ieee80211_node *); 85 static void node_age(struct ieee80211_node *); 86 static int8_t node_getrssi(const struct ieee80211_node *); 87 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 88 static void node_getmimoinfo(const struct ieee80211_node *, 89 struct ieee80211_mimo_info *); 90 91 static void _ieee80211_free_node(struct ieee80211_node *); 92 93 static void node_reclaim(struct ieee80211_node_table *nt, 94 struct ieee80211_node *ni); 95 static void ieee80211_node_table_init(struct ieee80211com *ic, 96 struct ieee80211_node_table *nt, const char *name, 97 int inact, int keymaxix); 98 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 99 struct ieee80211vap *); 100 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 101 static void ieee80211_erp_timeout(struct ieee80211com *); 102 103 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 104 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 105 106 void 107 ieee80211_node_attach(struct ieee80211com *ic) 108 { 109 /* XXX really want maxlen enforced per-sta */ 110 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 111 "802.11 staging q"); 112 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 113 IEEE80211_INACT_INIT, ic->ic_max_keyix); 114 callout_init(&ic->ic_inact, 1); 115 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 116 ieee80211_node_timeout, ic); 117 118 ic->ic_node_alloc = node_alloc; 119 ic->ic_node_free = node_free; 120 ic->ic_node_cleanup = node_cleanup; 121 ic->ic_node_age = node_age; 122 ic->ic_node_drain = node_age; /* NB: same as age */ 123 ic->ic_node_getrssi = node_getrssi; 124 ic->ic_node_getsignal = node_getsignal; 125 ic->ic_node_getmimoinfo = node_getmimoinfo; 126 127 /* 128 * Set flags to be propagated to all vap's; 129 * these define default behaviour/configuration. 130 */ 131 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 132 } 133 134 void 135 ieee80211_node_detach(struct ieee80211com *ic) 136 { 137 138 callout_drain(&ic->ic_inact); 139 ieee80211_node_table_cleanup(&ic->ic_sta); 140 ieee80211_ageq_cleanup(&ic->ic_stageq); 141 } 142 143 void 144 ieee80211_node_vattach(struct ieee80211vap *vap) 145 { 146 /* NB: driver can override */ 147 vap->iv_max_aid = IEEE80211_AID_DEF; 148 149 /* default station inactivity timer setings */ 150 vap->iv_inact_init = IEEE80211_INACT_INIT; 151 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 152 vap->iv_inact_run = IEEE80211_INACT_RUN; 153 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 154 155 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 156 "%s: init %u auth %u run %u probe %u\n", __func__, 157 vap->iv_inact_init, vap->iv_inact_auth, 158 vap->iv_inact_run, vap->iv_inact_probe); 159 } 160 161 void 162 ieee80211_node_latevattach(struct ieee80211vap *vap) 163 { 164 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 165 /* XXX should we allow max aid to be zero? */ 166 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 167 vap->iv_max_aid = IEEE80211_AID_MIN; 168 if_printf(vap->iv_ifp, 169 "WARNING: max aid too small, changed to %d\n", 170 vap->iv_max_aid); 171 } 172 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 173 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 174 M_80211_NODE, 175 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 176 if (vap->iv_aid_bitmap == NULL) { 177 /* XXX no way to recover */ 178 printf("%s: no memory for AID bitmap, max aid %d!\n", 179 __func__, vap->iv_max_aid); 180 vap->iv_max_aid = 0; 181 } 182 } 183 184 ieee80211_reset_bss(vap); 185 186 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 187 } 188 189 void 190 ieee80211_node_vdetach(struct ieee80211vap *vap) 191 { 192 struct ieee80211com *ic = vap->iv_ic; 193 194 ieee80211_node_table_reset(&ic->ic_sta, vap); 195 if (vap->iv_bss != NULL) { 196 ieee80211_free_node(vap->iv_bss); 197 vap->iv_bss = NULL; 198 } 199 if (vap->iv_aid_bitmap != NULL) { 200 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 201 vap->iv_aid_bitmap = NULL; 202 } 203 } 204 205 /* 206 * Port authorize/unauthorize interfaces for use by an authenticator. 207 */ 208 209 void 210 ieee80211_node_authorize(struct ieee80211_node *ni) 211 { 212 struct ieee80211vap *vap = ni->ni_vap; 213 214 ni->ni_flags |= IEEE80211_NODE_AUTH; 215 ni->ni_inact_reload = vap->iv_inact_run; 216 ni->ni_inact = ni->ni_inact_reload; 217 218 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 219 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 220 } 221 222 void 223 ieee80211_node_unauthorize(struct ieee80211_node *ni) 224 { 225 struct ieee80211vap *vap = ni->ni_vap; 226 227 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 228 ni->ni_inact_reload = vap->iv_inact_auth; 229 if (ni->ni_inact > ni->ni_inact_reload) 230 ni->ni_inact = ni->ni_inact_reload; 231 232 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 233 "%s: inact_reload %u inact %u", __func__, 234 ni->ni_inact_reload, ni->ni_inact); 235 } 236 237 /* 238 * Fix tx parameters for a node according to ``association state''. 239 */ 240 void 241 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 242 { 243 struct ieee80211vap *vap = ni->ni_vap; 244 enum ieee80211_phymode mode; 245 246 if (ni->ni_flags & IEEE80211_NODE_HT) { 247 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 248 mode = IEEE80211_MODE_11NA; 249 else 250 mode = IEEE80211_MODE_11NG; 251 } else { /* legacy rate handling */ 252 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 253 mode = IEEE80211_MODE_STURBO_A; 254 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 255 mode = IEEE80211_MODE_HALF; 256 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 257 mode = IEEE80211_MODE_QUARTER; 258 /* NB: 108A should be handled as 11a */ 259 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 260 mode = IEEE80211_MODE_11A; 261 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 262 (ni->ni_flags & IEEE80211_NODE_ERP)) 263 mode = IEEE80211_MODE_11G; 264 else 265 mode = IEEE80211_MODE_11B; 266 } 267 ni->ni_txparms = &vap->iv_txparms[mode]; 268 } 269 270 /* 271 * Set/change the channel. The rate set is also updated as 272 * to insure a consistent view by drivers. 273 * XXX should be private but hostap needs it to deal with CSA 274 */ 275 void 276 ieee80211_node_set_chan(struct ieee80211_node *ni, 277 struct ieee80211_channel *chan) 278 { 279 struct ieee80211com *ic = ni->ni_ic; 280 struct ieee80211vap *vap = ni->ni_vap; 281 enum ieee80211_phymode mode; 282 283 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 284 285 ni->ni_chan = chan; 286 mode = ieee80211_chan2mode(chan); 287 if (IEEE80211_IS_CHAN_HT(chan)) { 288 /* 289 * We must install the legacy rate est in ni_rates and the 290 * HT rate set in ni_htrates. 291 */ 292 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 293 /* 294 * Setup bss tx parameters based on operating mode. We 295 * use legacy rates when operating in a mixed HT+non-HT bss 296 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 297 */ 298 if (mode == IEEE80211_MODE_11NA && 299 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 300 mode = IEEE80211_MODE_11A; 301 else if (mode == IEEE80211_MODE_11NG && 302 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 303 mode = IEEE80211_MODE_11G; 304 if (mode == IEEE80211_MODE_11G && 305 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 306 mode = IEEE80211_MODE_11B; 307 } 308 ni->ni_txparms = &vap->iv_txparms[mode]; 309 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 310 } 311 312 static __inline void 313 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 314 { 315 /* propagate useful state */ 316 nbss->ni_authmode = obss->ni_authmode; 317 nbss->ni_txpower = obss->ni_txpower; 318 nbss->ni_vlan = obss->ni_vlan; 319 /* XXX statistics? */ 320 /* XXX legacy WDS bssid? */ 321 } 322 323 void 324 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 325 { 326 struct ieee80211com *ic = vap->iv_ic; 327 struct ieee80211_node *ni; 328 329 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 330 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 331 ieee80211_opmode_name[vap->iv_opmode], 332 ieee80211_chan2ieee(ic, chan), 333 ieee80211_channel_type_char(chan), 334 chan->ic_flags); 335 336 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 337 if (ni == NULL) { 338 /* XXX recovery? */ 339 return; 340 } 341 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 342 ni->ni_esslen = vap->iv_des_ssid[0].len; 343 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 344 if (vap->iv_bss != NULL) 345 copy_bss(ni, vap->iv_bss); 346 ni->ni_intval = ic->ic_bintval; 347 if (vap->iv_flags & IEEE80211_F_PRIVACY) 348 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 349 if (ic->ic_phytype == IEEE80211_T_FH) { 350 ni->ni_fhdwell = 200; /* XXX */ 351 ni->ni_fhindex = 1; 352 } 353 if (vap->iv_opmode == IEEE80211_M_IBSS) { 354 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 355 if (vap->iv_flags & IEEE80211_F_DESBSSID) 356 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 357 else { 358 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 359 /* clear group bit, add local bit */ 360 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 361 } 362 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 363 if (vap->iv_flags & IEEE80211_F_DESBSSID) 364 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 365 else 366 #ifdef IEEE80211_SUPPORT_TDMA 367 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 368 #endif 369 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 370 #ifdef IEEE80211_SUPPORT_MESH 371 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 372 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 373 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 374 #endif 375 } 376 /* 377 * Fix the channel and related attributes. 378 */ 379 /* clear DFS CAC state on previous channel */ 380 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 381 ic->ic_bsschan->ic_freq != chan->ic_freq && 382 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 383 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 384 ic->ic_bsschan = chan; 385 ieee80211_node_set_chan(ni, chan); 386 ic->ic_curmode = ieee80211_chan2mode(chan); 387 /* 388 * Do mode-specific setup. 389 */ 390 if (IEEE80211_IS_CHAN_FULL(chan)) { 391 if (IEEE80211_IS_CHAN_ANYG(chan)) { 392 /* 393 * Use a mixed 11b/11g basic rate set. 394 */ 395 ieee80211_setbasicrates(&ni->ni_rates, 396 IEEE80211_MODE_11G); 397 if (vap->iv_flags & IEEE80211_F_PUREG) { 398 /* 399 * Also mark OFDM rates basic so 11b 400 * stations do not join (WiFi compliance). 401 */ 402 ieee80211_addbasicrates(&ni->ni_rates, 403 IEEE80211_MODE_11A); 404 } 405 } else if (IEEE80211_IS_CHAN_B(chan)) { 406 /* 407 * Force pure 11b rate set. 408 */ 409 ieee80211_setbasicrates(&ni->ni_rates, 410 IEEE80211_MODE_11B); 411 } 412 } 413 414 /* XXX TODO: other bits and pieces - eg fast-frames? */ 415 416 /* If we're an 11n channel then initialise the 11n bits */ 417 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 418 /* XXX what else? */ 419 ieee80211_ht_node_init(ni); 420 ieee80211_vht_node_init(ni); 421 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 422 /* XXX what else? */ 423 ieee80211_ht_node_init(ni); 424 } 425 426 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 427 } 428 429 /* 430 * Reset bss state on transition to the INIT state. 431 * Clear any stations from the table (they have been 432 * deauth'd) and reset the bss node (clears key, rate 433 * etc. state). 434 */ 435 void 436 ieee80211_reset_bss(struct ieee80211vap *vap) 437 { 438 struct ieee80211com *ic = vap->iv_ic; 439 struct ieee80211_node *ni, *obss; 440 441 ieee80211_node_table_reset(&ic->ic_sta, vap); 442 /* XXX multi-bss: wrong */ 443 ieee80211_reset_erp(ic); 444 445 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 446 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 447 obss = vap->iv_bss; 448 vap->iv_bss = ieee80211_ref_node(ni); 449 if (obss != NULL) { 450 copy_bss(ni, obss); 451 ni->ni_intval = ic->ic_bintval; 452 ieee80211_free_node(obss); 453 } else 454 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 455 } 456 457 static int 458 match_ssid(const struct ieee80211_node *ni, 459 int nssid, const struct ieee80211_scan_ssid ssids[]) 460 { 461 int i; 462 463 for (i = 0; i < nssid; i++) { 464 if (ni->ni_esslen == ssids[i].len && 465 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 466 return 1; 467 } 468 return 0; 469 } 470 471 /* 472 * Test a node for suitability/compatibility. 473 */ 474 static int 475 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 476 { 477 struct ieee80211com *ic = ni->ni_ic; 478 uint8_t rate; 479 480 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 481 return 0; 482 if (vap->iv_opmode == IEEE80211_M_IBSS) { 483 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 484 return 0; 485 } else { 486 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 487 return 0; 488 } 489 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 490 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 491 return 0; 492 } else { 493 /* XXX does this mean privacy is supported or required? */ 494 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 495 return 0; 496 } 497 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 498 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 499 if (rate & IEEE80211_RATE_BASIC) 500 return 0; 501 if (vap->iv_des_nssid != 0 && 502 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 503 return 0; 504 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 505 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 506 return 0; 507 return 1; 508 } 509 510 #ifdef IEEE80211_DEBUG 511 /* 512 * Display node suitability/compatibility. 513 */ 514 static void 515 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 516 { 517 struct ieee80211com *ic = ni->ni_ic; 518 uint8_t rate; 519 int fail; 520 521 fail = 0; 522 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 523 fail |= 0x01; 524 if (vap->iv_opmode == IEEE80211_M_IBSS) { 525 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 526 fail |= 0x02; 527 } else { 528 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 529 fail |= 0x02; 530 } 531 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 532 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 533 fail |= 0x04; 534 } else { 535 /* XXX does this mean privacy is supported or required? */ 536 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 537 fail |= 0x04; 538 } 539 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 540 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 541 if (rate & IEEE80211_RATE_BASIC) 542 fail |= 0x08; 543 if (vap->iv_des_nssid != 0 && 544 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 545 fail |= 0x10; 546 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 547 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 548 fail |= 0x20; 549 550 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 551 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 552 printf(" %3d%c", 553 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 554 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 555 fail & 0x08 ? '!' : ' '); 556 printf(" %4s%c", 557 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 558 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 559 "????", 560 fail & 0x02 ? '!' : ' '); 561 printf(" %3s%c ", 562 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 563 fail & 0x04 ? '!' : ' '); 564 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 565 printf("%s\n", fail & 0x10 ? "!" : ""); 566 } 567 #endif /* IEEE80211_DEBUG */ 568 569 570 int 571 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 572 { 573 struct ieee80211vap *vap = ni->ni_vap; 574 575 if (ni == vap->iv_bss || 576 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 577 /* unchanged, nothing to do */ 578 return 0; 579 } 580 581 if (!check_bss(vap, ni)) { 582 /* capabilities mismatch */ 583 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 584 "%s: merge failed, capabilities mismatch\n", __func__); 585 #ifdef IEEE80211_DEBUG 586 if (ieee80211_msg_assoc(vap)) 587 check_bss_debug(vap, ni); 588 #endif 589 vap->iv_stats.is_ibss_capmismatch++; 590 return 0; 591 } 592 593 return 1; 594 } 595 596 /* 597 * Check if the given node should populate the node table. 598 * 599 * We need to be in "see all beacons for all ssids" mode in order 600 * to do IBSS merges, however this means we will populate nodes for 601 * /all/ IBSS SSIDs, versus just the one we care about. 602 * 603 * So this check ensures the node can actually belong to our IBSS 604 * configuration. For now it simply checks the SSID. 605 */ 606 int 607 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 608 const struct ieee80211_scanparams *scan) 609 { 610 struct ieee80211vap *vap = ni->ni_vap; 611 int i; 612 613 /* 614 * If we have no SSID and no scan SSID, return OK. 615 */ 616 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 617 goto ok; 618 619 /* 620 * If we have one of (SSID, scan SSID) then return error. 621 */ 622 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 623 goto mismatch; 624 625 /* 626 * Double-check - we need scan SSID. 627 */ 628 if (scan->ssid == NULL) 629 goto mismatch; 630 631 /* 632 * Check if the scan SSID matches the SSID list for the VAP. 633 */ 634 for (i = 0; i < vap->iv_des_nssid; i++) { 635 636 /* Sanity length check */ 637 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 638 continue; 639 640 /* Note: SSID in the scan entry is the IE format */ 641 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 642 vap->iv_des_ssid[i].len) == 0) 643 goto ok; 644 } 645 646 mismatch: 647 return (0); 648 ok: 649 return (1); 650 } 651 652 /* 653 * Handle 802.11 ad hoc network merge. The 654 * convention, set by the Wireless Ethernet Compatibility Alliance 655 * (WECA), is that an 802.11 station will change its BSSID to match 656 * the "oldest" 802.11 ad hoc network, on the same channel, that 657 * has the station's desired SSID. The "oldest" 802.11 network 658 * sends beacons with the greatest TSF timestamp. 659 * 660 * The caller is assumed to validate TSF's before attempting a merge. 661 * 662 * Return !0 if the BSSID changed, 0 otherwise. 663 */ 664 int 665 ieee80211_ibss_merge(struct ieee80211_node *ni) 666 { 667 #ifdef IEEE80211_DEBUG 668 struct ieee80211vap *vap = ni->ni_vap; 669 struct ieee80211com *ic = ni->ni_ic; 670 #endif 671 672 if (! ieee80211_ibss_merge_check(ni)) 673 return 0; 674 675 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 676 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 677 ether_sprintf(ni->ni_bssid), 678 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 679 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 680 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 681 ); 682 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 683 } 684 685 /* 686 * Calculate HT channel promotion flags for all vaps. 687 * This assumes ni_chan have been setup for each vap. 688 */ 689 static int 690 gethtadjustflags(struct ieee80211com *ic) 691 { 692 struct ieee80211vap *vap; 693 int flags; 694 695 flags = 0; 696 /* XXX locking */ 697 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 698 if (vap->iv_state < IEEE80211_S_RUN) 699 continue; 700 switch (vap->iv_opmode) { 701 case IEEE80211_M_WDS: 702 case IEEE80211_M_STA: 703 case IEEE80211_M_AHDEMO: 704 case IEEE80211_M_HOSTAP: 705 case IEEE80211_M_IBSS: 706 case IEEE80211_M_MBSS: 707 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 708 break; 709 default: 710 break; 711 } 712 } 713 return flags; 714 } 715 716 /* 717 * Calculate VHT channel promotion flags for all vaps. 718 * This assumes ni_chan have been setup for each vap. 719 */ 720 static int 721 getvhtadjustflags(struct ieee80211com *ic) 722 { 723 struct ieee80211vap *vap; 724 int flags; 725 726 flags = 0; 727 /* XXX locking */ 728 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 729 if (vap->iv_state < IEEE80211_S_RUN) 730 continue; 731 switch (vap->iv_opmode) { 732 case IEEE80211_M_WDS: 733 case IEEE80211_M_STA: 734 case IEEE80211_M_AHDEMO: 735 case IEEE80211_M_HOSTAP: 736 case IEEE80211_M_IBSS: 737 case IEEE80211_M_MBSS: 738 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 739 break; 740 default: 741 break; 742 } 743 } 744 return flags; 745 } 746 747 /* 748 * Check if the current channel needs to change based on whether 749 * any vap's are using HT20/HT40. This is used to sync the state 750 * of ic_curchan after a channel width change on a running vap. 751 * 752 * Same applies for VHT. 753 */ 754 void 755 ieee80211_sync_curchan(struct ieee80211com *ic) 756 { 757 struct ieee80211_channel *c; 758 759 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 760 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 761 762 if (c != ic->ic_curchan) { 763 ic->ic_curchan = c; 764 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 765 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 766 IEEE80211_UNLOCK(ic); 767 ic->ic_set_channel(ic); 768 ieee80211_radiotap_chan_change(ic); 769 IEEE80211_LOCK(ic); 770 } 771 } 772 773 /* 774 * Setup the current channel. The request channel may be 775 * promoted if other vap's are operating with HT20/HT40. 776 */ 777 void 778 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 779 { 780 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 781 int flags = gethtadjustflags(ic); 782 /* 783 * Check for channel promotion required to support the 784 * set of running vap's. This assumes we are called 785 * after ni_chan is setup for each vap. 786 */ 787 /* XXX VHT? */ 788 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 789 if (flags > ieee80211_htchanflags(c)) 790 c = ieee80211_ht_adjust_channel(ic, c, flags); 791 } 792 793 /* 794 * VHT promotion - this will at least promote to VHT20/40 795 * based on what HT has done; it may further promote the 796 * channel to VHT80 or above. 797 */ 798 if (ic->ic_vhtcaps != 0) { 799 int flags = getvhtadjustflags(ic); 800 if (flags > ieee80211_vhtchanflags(c)) 801 c = ieee80211_vht_adjust_channel(ic, c, flags); 802 } 803 804 ic->ic_bsschan = ic->ic_curchan = c; 805 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 806 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 807 } 808 809 /* 810 * Change the current channel. The channel change is guaranteed to have 811 * happened before the next state change. 812 */ 813 void 814 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 815 { 816 ieee80211_setupcurchan(ic, c); 817 ieee80211_runtask(ic, &ic->ic_chan_task); 818 } 819 820 void 821 ieee80211_update_chw(struct ieee80211com *ic) 822 { 823 824 ieee80211_setupcurchan(ic, ic->ic_curchan); 825 ieee80211_runtask(ic, &ic->ic_chw_task); 826 } 827 828 /* 829 * Join the specified IBSS/BSS network. The node is assumed to 830 * be passed in with a held reference. 831 */ 832 static int 833 ieee80211_sta_join1(struct ieee80211_node *selbs) 834 { 835 struct ieee80211vap *vap = selbs->ni_vap; 836 struct ieee80211com *ic = selbs->ni_ic; 837 struct ieee80211_node *obss; 838 int canreassoc; 839 840 /* 841 * Committed to selbs, setup state. 842 */ 843 obss = vap->iv_bss; 844 /* 845 * Check if old+new node have the same address in which 846 * case we can reassociate when operating in sta mode. 847 */ 848 canreassoc = (obss != NULL && 849 vap->iv_state == IEEE80211_S_RUN && 850 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 851 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 852 if (obss != NULL) { 853 struct ieee80211_node_table *nt = obss->ni_table; 854 855 copy_bss(selbs, obss); 856 ieee80211_node_decref(obss); /* iv_bss reference */ 857 858 IEEE80211_NODE_LOCK(nt); 859 node_reclaim(nt, obss); /* station table reference */ 860 IEEE80211_NODE_UNLOCK(nt); 861 862 obss = NULL; /* NB: guard against later use */ 863 } 864 865 /* 866 * Delete unusable rates; we've already checked 867 * that the negotiated rate set is acceptable. 868 */ 869 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 870 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 871 872 ieee80211_setcurchan(ic, selbs->ni_chan); 873 /* 874 * Set the erp state (mostly the slot time) to deal with 875 * the auto-select case; this should be redundant if the 876 * mode is locked. 877 */ 878 ieee80211_reset_erp(ic); 879 ieee80211_wme_initparams(vap); 880 881 if (vap->iv_opmode == IEEE80211_M_STA) { 882 if (canreassoc) { 883 /* Reassociate */ 884 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 885 } else { 886 /* 887 * Act as if we received a DEAUTH frame in case we 888 * are invoked from the RUN state. This will cause 889 * us to try to re-authenticate if we are operating 890 * as a station. 891 */ 892 ieee80211_new_state(vap, IEEE80211_S_AUTH, 893 IEEE80211_FC0_SUBTYPE_DEAUTH); 894 } 895 } else 896 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 897 return 1; 898 } 899 900 int 901 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 902 const struct ieee80211_scan_entry *se) 903 { 904 struct ieee80211com *ic = vap->iv_ic; 905 struct ieee80211_node *ni; 906 int do_ht = 0; 907 908 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 909 if (ni == NULL) { 910 /* XXX msg */ 911 return 0; 912 } 913 914 /* 915 * Expand scan state into node's format. 916 * XXX may not need all this stuff 917 */ 918 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 919 ni->ni_esslen = se->se_ssid[1]; 920 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 921 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 922 ni->ni_intval = se->se_intval; 923 ni->ni_capinfo = se->se_capinfo; 924 ni->ni_chan = chan; 925 ni->ni_timoff = se->se_timoff; 926 ni->ni_fhdwell = se->se_fhdwell; 927 ni->ni_fhindex = se->se_fhindex; 928 ni->ni_erp = se->se_erp; 929 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 930 ni->ni_noise = se->se_noise; 931 if (vap->iv_opmode == IEEE80211_M_STA) { 932 /* NB: only infrastructure mode requires an associd */ 933 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 934 } 935 936 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 937 ieee80211_ies_expand(&ni->ni_ies); 938 #ifdef IEEE80211_SUPPORT_SUPERG 939 if (ni->ni_ies.ath_ie != NULL) 940 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 941 #endif 942 if (ni->ni_ies.htcap_ie != NULL) 943 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 944 if (ni->ni_ies.htinfo_ie != NULL) 945 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 946 #ifdef IEEE80211_SUPPORT_MESH 947 if (ni->ni_ies.meshid_ie != NULL) 948 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 949 #endif 950 #ifdef IEEE80211_SUPPORT_TDMA 951 if (ni->ni_ies.tdma_ie != NULL) 952 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 953 #endif 954 if (ni->ni_ies.vhtcap_ie != NULL) 955 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 956 if (ni->ni_ies.vhtopmode_ie != NULL) 957 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 958 959 /* XXX parse BSSLOAD IE */ 960 /* XXX parse TXPWRENV IE */ 961 /* XXX parse APCHANREP IE */ 962 } 963 964 vap->iv_dtim_period = se->se_dtimperiod; 965 vap->iv_dtim_count = 0; 966 967 /* NB: must be after ni_chan is setup */ 968 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 969 IEEE80211_F_DOSORT); 970 if (ieee80211_iserp_rateset(&ni->ni_rates)) 971 ni->ni_flags |= IEEE80211_NODE_ERP; 972 973 /* 974 * Setup HT state for this node if it's available, otherwise 975 * non-STA modes won't pick this state up. 976 * 977 * For IBSS and related modes that don't go through an 978 * association request/response, the only appropriate place 979 * to setup the HT state is here. 980 */ 981 if (ni->ni_ies.htinfo_ie != NULL && 982 ni->ni_ies.htcap_ie != NULL && 983 vap->iv_flags_ht & IEEE80211_FHT_HT) { 984 ieee80211_ht_node_init(ni); 985 ieee80211_ht_updateparams(ni, 986 ni->ni_ies.htcap_ie, 987 ni->ni_ies.htinfo_ie); 988 do_ht = 1; 989 } 990 991 /* 992 * Setup VHT state for this node if it's available. 993 * Same as the above. 994 * 995 * For now, don't allow 2GHz VHT operation. 996 */ 997 if (ni->ni_ies.vhtopmode_ie != NULL && 998 ni->ni_ies.vhtcap_ie != NULL && 999 vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1000 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1001 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1002 __func__, 1003 ni->ni_macaddr, 1004 ":"); 1005 } else { 1006 ieee80211_vht_node_init(ni); 1007 ieee80211_vht_updateparams(ni, 1008 ni->ni_ies.vhtcap_ie, 1009 ni->ni_ies.vhtopmode_ie); 1010 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1011 ni->ni_ies.vhtopmode_ie); 1012 do_ht = 1; 1013 } 1014 } 1015 1016 /* Finally do the node channel change */ 1017 if (do_ht) { 1018 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1019 ni->ni_ies.htinfo_ie); 1020 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1021 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1022 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1023 } 1024 1025 /* XXX else check for ath FF? */ 1026 /* XXX QoS? Difficult given that WME config is specific to a master */ 1027 1028 ieee80211_node_setuptxparms(ni); 1029 ieee80211_ratectl_node_init(ni); 1030 1031 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1032 } 1033 1034 /* 1035 * Leave the specified IBSS/BSS network. The node is assumed to 1036 * be passed in with a held reference. 1037 */ 1038 void 1039 ieee80211_sta_leave(struct ieee80211_node *ni) 1040 { 1041 struct ieee80211com *ic = ni->ni_ic; 1042 1043 ic->ic_node_cleanup(ni); 1044 ieee80211_notify_node_leave(ni); 1045 } 1046 1047 /* 1048 * Send a deauthenticate frame and drop the station. 1049 */ 1050 void 1051 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1052 { 1053 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1054 ieee80211_ref_node(ni); 1055 if (ni->ni_associd != 0) 1056 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1057 ieee80211_node_leave(ni); 1058 ieee80211_free_node(ni); 1059 } 1060 1061 static struct ieee80211_node * 1062 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1063 { 1064 struct ieee80211_node *ni; 1065 1066 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1067 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1068 return ni; 1069 } 1070 1071 /* 1072 * Initialize an ie blob with the specified data. If previous 1073 * data exists re-use the data block. As a side effect we clear 1074 * all references to specific ie's; the caller is required to 1075 * recalculate them. 1076 */ 1077 int 1078 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1079 { 1080 /* NB: assumes data+len are the last fields */ 1081 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1082 if (ies->data != NULL && ies->len != len) { 1083 /* data size changed */ 1084 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1085 ies->data = NULL; 1086 } 1087 if (ies->data == NULL) { 1088 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1089 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1090 if (ies->data == NULL) { 1091 ies->len = 0; 1092 /* NB: pointers have already been zero'd above */ 1093 return 0; 1094 } 1095 } 1096 memcpy(ies->data, data, len); 1097 ies->len = len; 1098 return 1; 1099 } 1100 1101 /* 1102 * Reclaim storage for an ie blob. 1103 */ 1104 void 1105 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1106 { 1107 if (ies->data != NULL) 1108 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1109 } 1110 1111 /* 1112 * Expand an ie blob data contents and to fillin individual 1113 * ie pointers. The data blob is assumed to be well-formed; 1114 * we don't do any validity checking of ie lengths. 1115 */ 1116 void 1117 ieee80211_ies_expand(struct ieee80211_ies *ies) 1118 { 1119 uint8_t *ie; 1120 int ielen; 1121 1122 ie = ies->data; 1123 ielen = ies->len; 1124 while (ielen > 0) { 1125 switch (ie[0]) { 1126 case IEEE80211_ELEMID_VENDOR: 1127 if (iswpaoui(ie)) 1128 ies->wpa_ie = ie; 1129 else if (iswmeoui(ie)) 1130 ies->wme_ie = ie; 1131 #ifdef IEEE80211_SUPPORT_SUPERG 1132 else if (isatherosoui(ie)) 1133 ies->ath_ie = ie; 1134 #endif 1135 #ifdef IEEE80211_SUPPORT_TDMA 1136 else if (istdmaoui(ie)) 1137 ies->tdma_ie = ie; 1138 #endif 1139 break; 1140 case IEEE80211_ELEMID_RSN: 1141 ies->rsn_ie = ie; 1142 break; 1143 case IEEE80211_ELEMID_HTCAP: 1144 ies->htcap_ie = ie; 1145 break; 1146 case IEEE80211_ELEMID_HTINFO: 1147 ies->htinfo_ie = ie; 1148 break; 1149 #ifdef IEEE80211_SUPPORT_MESH 1150 case IEEE80211_ELEMID_MESHID: 1151 ies->meshid_ie = ie; 1152 break; 1153 #endif 1154 case IEEE80211_ELEMID_VHT_CAP: 1155 ies->vhtcap_ie = ie; 1156 break; 1157 case IEEE80211_ELEMID_VHT_OPMODE: 1158 ies->vhtopmode_ie = ie; 1159 break; 1160 case IEEE80211_ELEMID_VHT_PWR_ENV: 1161 ies->vhtpwrenv_ie = ie; 1162 break; 1163 case IEEE80211_ELEMID_BSSLOAD: 1164 ies->bssload_ie = ie; 1165 break; 1166 case IEEE80211_ELEMID_APCHANREP: 1167 ies->apchanrep_ie = ie; 1168 break; 1169 } 1170 ielen -= 2 + ie[1]; 1171 ie += 2 + ie[1]; 1172 } 1173 } 1174 1175 /* 1176 * Reclaim any resources in a node and reset any critical 1177 * state. Typically nodes are free'd immediately after, 1178 * but in some cases the storage may be reused so we need 1179 * to insure consistent state (should probably fix that). 1180 */ 1181 static void 1182 node_cleanup(struct ieee80211_node *ni) 1183 { 1184 struct ieee80211vap *vap = ni->ni_vap; 1185 struct ieee80211com *ic = ni->ni_ic; 1186 int i; 1187 1188 /* NB: preserve ni_table */ 1189 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1190 if (vap->iv_opmode != IEEE80211_M_STA) 1191 vap->iv_ps_sta--; 1192 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1193 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1194 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1195 } 1196 /* 1197 * Cleanup any VHT and HT-related state. 1198 */ 1199 if (ni->ni_flags & IEEE80211_NODE_VHT) 1200 ieee80211_vht_node_cleanup(ni); 1201 if (ni->ni_flags & IEEE80211_NODE_HT) 1202 ieee80211_ht_node_cleanup(ni); 1203 #ifdef IEEE80211_SUPPORT_SUPERG 1204 /* Always do FF node cleanup; for A-MSDU */ 1205 ieee80211_ff_node_cleanup(ni); 1206 #endif 1207 #ifdef IEEE80211_SUPPORT_MESH 1208 /* 1209 * Cleanup any mesh-related state. 1210 */ 1211 if (vap->iv_opmode == IEEE80211_M_MBSS) 1212 ieee80211_mesh_node_cleanup(ni); 1213 #endif 1214 /* 1215 * Clear any staging queue entries. 1216 */ 1217 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1218 1219 /* 1220 * Clear AREF flag that marks the authorization refcnt bump 1221 * has happened. This is probably not needed as the node 1222 * should always be removed from the table so not found but 1223 * do it just in case. 1224 * Likewise clear the ASSOCID flag as these flags are intended 1225 * to be managed in tandem. 1226 */ 1227 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1228 1229 /* 1230 * Drain power save queue and, if needed, clear TIM. 1231 */ 1232 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1233 vap->iv_set_tim(ni, 0); 1234 1235 ni->ni_associd = 0; 1236 if (ni->ni_challenge != NULL) { 1237 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1238 ni->ni_challenge = NULL; 1239 } 1240 /* 1241 * Preserve SSID, WPA, and WME ie's so the bss node is 1242 * reusable during a re-auth/re-assoc state transition. 1243 * If we remove these data they will not be recreated 1244 * because they come from a probe-response or beacon frame 1245 * which cannot be expected prior to the association-response. 1246 * This should not be an issue when operating in other modes 1247 * as stations leaving always go through a full state transition 1248 * which will rebuild this state. 1249 * 1250 * XXX does this leave us open to inheriting old state? 1251 */ 1252 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1253 if (ni->ni_rxfrag[i] != NULL) { 1254 m_freem(ni->ni_rxfrag[i]); 1255 ni->ni_rxfrag[i] = NULL; 1256 } 1257 /* 1258 * Must be careful here to remove any key map entry w/o a LOR. 1259 */ 1260 ieee80211_node_delucastkey(ni); 1261 } 1262 1263 static void 1264 node_free(struct ieee80211_node *ni) 1265 { 1266 struct ieee80211com *ic = ni->ni_ic; 1267 1268 ieee80211_ratectl_node_deinit(ni); 1269 ic->ic_node_cleanup(ni); 1270 ieee80211_ies_cleanup(&ni->ni_ies); 1271 ieee80211_psq_cleanup(&ni->ni_psq); 1272 IEEE80211_FREE(ni, M_80211_NODE); 1273 } 1274 1275 static void 1276 node_age(struct ieee80211_node *ni) 1277 { 1278 struct ieee80211vap *vap = ni->ni_vap; 1279 1280 /* 1281 * Age frames on the power save queue. 1282 */ 1283 if (ieee80211_node_psq_age(ni) != 0 && 1284 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1285 vap->iv_set_tim(ni, 0); 1286 /* 1287 * Age out HT resources (e.g. frames on the 1288 * A-MPDU reorder queues). 1289 */ 1290 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1291 ieee80211_ht_node_age(ni); 1292 } 1293 1294 static int8_t 1295 node_getrssi(const struct ieee80211_node *ni) 1296 { 1297 uint32_t avgrssi = ni->ni_avgrssi; 1298 int32_t rssi; 1299 1300 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1301 return 0; 1302 rssi = IEEE80211_RSSI_GET(avgrssi); 1303 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1304 } 1305 1306 static void 1307 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1308 { 1309 *rssi = node_getrssi(ni); 1310 *noise = ni->ni_noise; 1311 } 1312 1313 static void 1314 node_getmimoinfo(const struct ieee80211_node *ni, 1315 struct ieee80211_mimo_info *info) 1316 { 1317 int i; 1318 uint32_t avgrssi; 1319 int32_t rssi; 1320 1321 bzero(info, sizeof(*info)); 1322 1323 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1324 /* Note: for now, just pri20 channel info */ 1325 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1326 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1327 info->ch[i].rssi[0] = 0; 1328 } else { 1329 rssi = IEEE80211_RSSI_GET(avgrssi); 1330 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1331 } 1332 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1333 } 1334 1335 /* XXX ext radios? */ 1336 1337 /* XXX EVM? */ 1338 } 1339 1340 static void 1341 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1342 struct ieee80211_node *ni) 1343 { 1344 struct ieee80211com *ic = nt->nt_ic; 1345 int hash; 1346 1347 IEEE80211_NODE_LOCK_ASSERT(nt); 1348 1349 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1350 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1351 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1352 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1353 nt->nt_count++; 1354 ni->ni_table = nt; 1355 } 1356 1357 static void 1358 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1359 struct ieee80211_node *ni) 1360 { 1361 1362 IEEE80211_NODE_LOCK_ASSERT(nt); 1363 1364 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1365 LIST_REMOVE(ni, ni_hash); 1366 nt->nt_count--; 1367 KASSERT(nt->nt_count >= 0, 1368 ("nt_count is negative (%d)!\n", nt->nt_count)); 1369 ni->ni_table = NULL; 1370 } 1371 1372 struct ieee80211_node * 1373 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1374 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1375 { 1376 struct ieee80211com *ic = nt->nt_ic; 1377 struct ieee80211_node *ni; 1378 1379 ni = ic->ic_node_alloc(vap, macaddr); 1380 if (ni == NULL) { 1381 vap->iv_stats.is_rx_nodealloc++; 1382 return NULL; 1383 } 1384 1385 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1386 "%s %p<%s> in %s table\n", __func__, ni, 1387 ether_sprintf(macaddr), nt->nt_name); 1388 1389 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1390 ieee80211_node_initref(ni); /* mark referenced */ 1391 ni->ni_chan = IEEE80211_CHAN_ANYC; 1392 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1393 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1394 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1395 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1396 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1397 ni->ni_inact_reload = nt->nt_inact_init; 1398 ni->ni_inact = ni->ni_inact_reload; 1399 ni->ni_ath_defkeyix = 0x7fff; 1400 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1401 #ifdef IEEE80211_SUPPORT_MESH 1402 if (vap->iv_opmode == IEEE80211_M_MBSS) 1403 ieee80211_mesh_node_init(vap, ni); 1404 #endif 1405 IEEE80211_NODE_LOCK(nt); 1406 ieee80211_add_node_nt(nt, ni); 1407 ni->ni_vap = vap; 1408 ni->ni_ic = ic; 1409 IEEE80211_NODE_UNLOCK(nt); 1410 1411 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1412 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1413 1414 ieee80211_ratectl_node_init(ni); 1415 1416 return ni; 1417 } 1418 1419 /* 1420 * Craft a temporary node suitable for sending a management frame 1421 * to the specified station. We craft only as much state as we 1422 * need to do the work since the node will be immediately reclaimed 1423 * once the send completes. 1424 */ 1425 struct ieee80211_node * 1426 ieee80211_tmp_node(struct ieee80211vap *vap, 1427 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1428 { 1429 struct ieee80211com *ic = vap->iv_ic; 1430 struct ieee80211_node *ni; 1431 1432 ni = ic->ic_node_alloc(vap, macaddr); 1433 if (ni != NULL) { 1434 struct ieee80211_node *bss = vap->iv_bss; 1435 1436 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1437 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1438 1439 ni->ni_table = NULL; /* NB: pedantic */ 1440 ni->ni_ic = ic; /* NB: needed to set channel */ 1441 ni->ni_vap = vap; 1442 1443 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1444 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1445 ieee80211_node_initref(ni); /* mark referenced */ 1446 /* NB: required by ieee80211_fix_rate */ 1447 ieee80211_node_set_chan(ni, bss->ni_chan); 1448 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1449 IEEE80211_KEYIX_NONE); 1450 ni->ni_txpower = bss->ni_txpower; 1451 /* XXX optimize away */ 1452 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1453 1454 ieee80211_ratectl_node_init(ni); 1455 } else { 1456 /* XXX msg */ 1457 vap->iv_stats.is_rx_nodealloc++; 1458 } 1459 return ni; 1460 } 1461 1462 struct ieee80211_node * 1463 ieee80211_dup_bss(struct ieee80211vap *vap, 1464 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1465 { 1466 struct ieee80211com *ic = vap->iv_ic; 1467 struct ieee80211_node *ni; 1468 1469 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1470 if (ni != NULL) { 1471 struct ieee80211_node *bss = vap->iv_bss; 1472 /* 1473 * Inherit from iv_bss. 1474 */ 1475 copy_bss(ni, bss); 1476 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1477 ieee80211_node_set_chan(ni, bss->ni_chan); 1478 } 1479 return ni; 1480 } 1481 1482 /* 1483 * Create a bss node for a legacy WDS vap. The far end does 1484 * not associate so we just create create a new node and 1485 * simulate an association. The caller is responsible for 1486 * installing the node as the bss node and handling any further 1487 * setup work like authorizing the port. 1488 */ 1489 struct ieee80211_node * 1490 ieee80211_node_create_wds(struct ieee80211vap *vap, 1491 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1492 { 1493 struct ieee80211com *ic = vap->iv_ic; 1494 struct ieee80211_node *ni; 1495 1496 /* XXX check if node already in sta table? */ 1497 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1498 if (ni != NULL) { 1499 ni->ni_wdsvap = vap; 1500 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1501 /* 1502 * Inherit any manually configured settings. 1503 */ 1504 copy_bss(ni, vap->iv_bss); 1505 ieee80211_node_set_chan(ni, chan); 1506 /* NB: propagate ssid so available to WPA supplicant */ 1507 ni->ni_esslen = vap->iv_des_ssid[0].len; 1508 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1509 /* NB: no associd for peer */ 1510 /* 1511 * There are no management frames to use to 1512 * discover neighbor capabilities, so blindly 1513 * propagate the local configuration. 1514 */ 1515 if (vap->iv_flags & IEEE80211_F_WME) 1516 ni->ni_flags |= IEEE80211_NODE_QOS; 1517 #ifdef IEEE80211_SUPPORT_SUPERG 1518 if (vap->iv_flags & IEEE80211_F_FF) 1519 ni->ni_flags |= IEEE80211_NODE_FF; 1520 #endif 1521 /* XXX VHT */ 1522 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1523 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1524 /* 1525 * Device is HT-capable and HT is enabled for 1526 * the vap; setup HT operation. On return 1527 * ni_chan will be adjusted to an HT channel. 1528 */ 1529 ieee80211_ht_wds_init(ni); 1530 if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1531 printf("%s: TODO: vht_wds_init\n", __func__); 1532 } 1533 } else { 1534 struct ieee80211_channel *c = ni->ni_chan; 1535 /* 1536 * Force a legacy channel to be used. 1537 */ 1538 c = ieee80211_find_channel(ic, 1539 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1540 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1541 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1542 ni->ni_chan = c; 1543 } 1544 } 1545 return ni; 1546 } 1547 1548 struct ieee80211_node * 1549 #ifdef IEEE80211_DEBUG_REFCNT 1550 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1551 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1552 #else 1553 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1554 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1555 #endif 1556 { 1557 struct ieee80211_node *ni; 1558 int hash; 1559 1560 IEEE80211_NODE_LOCK_ASSERT(nt); 1561 1562 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1563 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1564 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1565 ieee80211_ref_node(ni); /* mark referenced */ 1566 #ifdef IEEE80211_DEBUG_REFCNT 1567 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1568 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1569 func, line, 1570 ni, ether_sprintf(ni->ni_macaddr), 1571 ieee80211_node_refcnt(ni)); 1572 #endif 1573 return ni; 1574 } 1575 } 1576 return NULL; 1577 } 1578 1579 struct ieee80211_node * 1580 #ifdef IEEE80211_DEBUG_REFCNT 1581 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1582 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1583 #else 1584 ieee80211_find_node(struct ieee80211_node_table *nt, 1585 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1586 #endif 1587 { 1588 struct ieee80211_node *ni; 1589 1590 IEEE80211_NODE_LOCK(nt); 1591 ni = ieee80211_find_node_locked(nt, macaddr); 1592 IEEE80211_NODE_UNLOCK(nt); 1593 return ni; 1594 } 1595 1596 struct ieee80211_node * 1597 #ifdef IEEE80211_DEBUG_REFCNT 1598 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1599 const struct ieee80211vap *vap, 1600 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1601 #else 1602 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1603 const struct ieee80211vap *vap, 1604 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1605 #endif 1606 { 1607 struct ieee80211_node *ni; 1608 int hash; 1609 1610 IEEE80211_NODE_LOCK_ASSERT(nt); 1611 1612 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1613 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1614 if (ni->ni_vap == vap && 1615 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1616 ieee80211_ref_node(ni); /* mark referenced */ 1617 #ifdef IEEE80211_DEBUG_REFCNT 1618 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1619 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1620 func, line, 1621 ni, ether_sprintf(ni->ni_macaddr), 1622 ieee80211_node_refcnt(ni)); 1623 #endif 1624 return ni; 1625 } 1626 } 1627 return NULL; 1628 } 1629 1630 struct ieee80211_node * 1631 #ifdef IEEE80211_DEBUG_REFCNT 1632 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1633 const struct ieee80211vap *vap, 1634 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1635 #else 1636 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1637 const struct ieee80211vap *vap, 1638 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1639 #endif 1640 { 1641 struct ieee80211_node *ni; 1642 1643 IEEE80211_NODE_LOCK(nt); 1644 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1645 IEEE80211_NODE_UNLOCK(nt); 1646 return ni; 1647 } 1648 1649 /* 1650 * Fake up a node; this handles node discovery in adhoc mode. 1651 * Note that for the driver's benefit we we treat this like 1652 * an association so the driver has an opportunity to setup 1653 * it's private state. 1654 */ 1655 struct ieee80211_node * 1656 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1657 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1658 { 1659 struct ieee80211_node *ni; 1660 1661 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1662 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1663 ni = ieee80211_dup_bss(vap, macaddr); 1664 if (ni != NULL) { 1665 struct ieee80211com *ic = vap->iv_ic; 1666 1667 /* XXX no rate negotiation; just dup */ 1668 ni->ni_rates = vap->iv_bss->ni_rates; 1669 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1670 ni->ni_flags |= IEEE80211_NODE_ERP; 1671 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1672 /* 1673 * In adhoc demo mode there are no management 1674 * frames to use to discover neighbor capabilities, 1675 * so blindly propagate the local configuration 1676 * so we can do interesting things (e.g. use 1677 * WME to disable ACK's). 1678 */ 1679 /* 1680 * XXX TODO: 11n? 1681 */ 1682 if (vap->iv_flags & IEEE80211_F_WME) 1683 ni->ni_flags |= IEEE80211_NODE_QOS; 1684 #ifdef IEEE80211_SUPPORT_SUPERG 1685 if (vap->iv_flags & IEEE80211_F_FF) 1686 ni->ni_flags |= IEEE80211_NODE_FF; 1687 #endif 1688 } 1689 ieee80211_node_setuptxparms(ni); 1690 ieee80211_ratectl_node_init(ni); 1691 1692 /* 1693 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1694 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1695 * that after we hear that we can indeed do 11n 1696 * (either by a beacon frame or by a probe response.) 1697 */ 1698 1699 /* 1700 * This is the first time we see the node. 1701 */ 1702 if (ic->ic_newassoc != NULL) 1703 ic->ic_newassoc(ni, 1); 1704 1705 /* 1706 * Kick off a probe request to the given node; 1707 * we will then use the probe response to update 1708 * 11n/etc configuration state. 1709 * 1710 * XXX TODO: this isn't guaranteed, and until we get 1711 * a probe response, we won't be able to actually 1712 * do anything 802.11n related to the node. 1713 * So if this does indeed work, maybe we should hold 1714 * off on sending responses until we get the probe 1715 * response, or just default to some sensible subset 1716 * of 802.11n behaviour (eg always allow aggregation 1717 * negotiation TO us, but not FROM us, etc) so we 1718 * aren't entirely busted. 1719 */ 1720 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1721 ieee80211_send_probereq(ni, /* node */ 1722 vap->iv_myaddr, /* SA */ 1723 ni->ni_macaddr, /* DA */ 1724 vap->iv_bss->ni_bssid, /* BSSID */ 1725 vap->iv_bss->ni_essid, 1726 vap->iv_bss->ni_esslen); /* SSID */ 1727 } 1728 1729 /* XXX not right for 802.1x/WPA */ 1730 ieee80211_node_authorize(ni); 1731 } 1732 return ni; 1733 } 1734 1735 void 1736 ieee80211_init_neighbor(struct ieee80211_node *ni, 1737 const struct ieee80211_frame *wh, 1738 const struct ieee80211_scanparams *sp) 1739 { 1740 int do_ht_setup = 0, do_vht_setup = 0; 1741 1742 ni->ni_esslen = sp->ssid[1]; 1743 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1744 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1745 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1746 ni->ni_intval = sp->bintval; 1747 ni->ni_capinfo = sp->capinfo; 1748 ni->ni_chan = ni->ni_ic->ic_curchan; 1749 ni->ni_fhdwell = sp->fhdwell; 1750 ni->ni_fhindex = sp->fhindex; 1751 ni->ni_erp = sp->erp; 1752 ni->ni_timoff = sp->timoff; 1753 #ifdef IEEE80211_SUPPORT_MESH 1754 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1755 ieee80211_mesh_init_neighbor(ni, wh, sp); 1756 #endif 1757 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1758 ieee80211_ies_expand(&ni->ni_ies); 1759 if (ni->ni_ies.wme_ie != NULL) 1760 ni->ni_flags |= IEEE80211_NODE_QOS; 1761 else 1762 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1763 #ifdef IEEE80211_SUPPORT_SUPERG 1764 if (ni->ni_ies.ath_ie != NULL) 1765 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1766 #endif 1767 if (ni->ni_ies.htcap_ie != NULL) 1768 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1769 if (ni->ni_ies.htinfo_ie != NULL) 1770 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1771 1772 if (ni->ni_ies.vhtcap_ie != NULL) 1773 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1774 if (ni->ni_ies.vhtopmode_ie != NULL) 1775 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1776 1777 if ((ni->ni_ies.htcap_ie != NULL) && 1778 (ni->ni_ies.htinfo_ie != NULL) && 1779 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1780 do_ht_setup = 1; 1781 } 1782 1783 if ((ni->ni_ies.vhtcap_ie != NULL) && 1784 (ni->ni_ies.vhtopmode_ie != NULL) && 1785 (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1786 do_vht_setup = 1; 1787 } 1788 1789 } 1790 1791 /* NB: must be after ni_chan is setup */ 1792 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1793 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1794 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1795 1796 /* 1797 * If the neighbor is HT compatible, flip that on. 1798 */ 1799 if (do_ht_setup) { 1800 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1801 "%s: doing HT setup\n", __func__); 1802 ieee80211_ht_node_init(ni); 1803 ieee80211_ht_updateparams(ni, 1804 ni->ni_ies.htcap_ie, 1805 ni->ni_ies.htinfo_ie); 1806 1807 if (do_vht_setup) { 1808 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1809 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1810 __func__, 1811 ni->ni_macaddr, 1812 ":"); 1813 } else { 1814 ieee80211_vht_node_init(ni); 1815 ieee80211_vht_updateparams(ni, 1816 ni->ni_ies.vhtcap_ie, 1817 ni->ni_ies.vhtopmode_ie); 1818 ieee80211_setup_vht_rates(ni, 1819 ni->ni_ies.vhtcap_ie, 1820 ni->ni_ies.vhtopmode_ie); 1821 } 1822 } 1823 1824 /* 1825 * Finally do the channel upgrade/change based 1826 * on the HT/VHT configuration. 1827 */ 1828 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1829 ni->ni_ies.htinfo_ie); 1830 ieee80211_setup_htrates(ni, 1831 ni->ni_ies.htcap_ie, 1832 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1833 ieee80211_setup_basic_htrates(ni, 1834 ni->ni_ies.htinfo_ie); 1835 1836 ieee80211_node_setuptxparms(ni); 1837 ieee80211_ratectl_node_init(ni); 1838 1839 /* Reassociate; we're now 11n/11ac */ 1840 /* 1841 * XXX TODO: this is the wrong thing to do - 1842 * we're calling it with isnew=1 so the ath(4) 1843 * driver reinitialises the rate tables. 1844 * This "mostly" works for ath(4), but it won't 1845 * be right for firmware devices which allocate 1846 * node states. 1847 * 1848 * So, do we just create a new node and delete 1849 * the old one? Or? 1850 */ 1851 if (ni->ni_ic->ic_newassoc) 1852 ni->ni_ic->ic_newassoc(ni, 1); 1853 } 1854 } 1855 1856 /* 1857 * Do node discovery in adhoc mode on receipt of a beacon 1858 * or probe response frame. Note that for the driver's 1859 * benefit we we treat this like an association so the 1860 * driver has an opportunity to setup it's private state. 1861 */ 1862 struct ieee80211_node * 1863 ieee80211_add_neighbor(struct ieee80211vap *vap, 1864 const struct ieee80211_frame *wh, 1865 const struct ieee80211_scanparams *sp) 1866 { 1867 struct ieee80211_node *ni; 1868 1869 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1870 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1871 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1872 if (ni != NULL) { 1873 struct ieee80211com *ic = vap->iv_ic; 1874 1875 ieee80211_init_neighbor(ni, wh, sp); 1876 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1877 ni->ni_flags |= IEEE80211_NODE_ERP; 1878 ieee80211_node_setuptxparms(ni); 1879 ieee80211_ratectl_node_init(ni); 1880 if (ic->ic_newassoc != NULL) 1881 ic->ic_newassoc(ni, 1); 1882 /* XXX not right for 802.1x/WPA */ 1883 ieee80211_node_authorize(ni); 1884 } 1885 return ni; 1886 } 1887 1888 #define IS_PROBEREQ(wh) \ 1889 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1890 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1891 #define IS_BCAST_PROBEREQ(wh) \ 1892 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1893 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1894 1895 static __inline struct ieee80211_node * 1896 _find_rxnode(struct ieee80211_node_table *nt, 1897 const struct ieee80211_frame_min *wh) 1898 { 1899 if (IS_BCAST_PROBEREQ(wh)) 1900 return NULL; /* spam bcast probe req to all vap's */ 1901 return ieee80211_find_node_locked(nt, wh->i_addr2); 1902 } 1903 1904 /* 1905 * Locate the node for sender, track state, and then pass the 1906 * (referenced) node up to the 802.11 layer for its use. Note 1907 * we can return NULL if the sender is not in the table. 1908 */ 1909 struct ieee80211_node * 1910 #ifdef IEEE80211_DEBUG_REFCNT 1911 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1912 const struct ieee80211_frame_min *wh, const char *func, int line) 1913 #else 1914 ieee80211_find_rxnode(struct ieee80211com *ic, 1915 const struct ieee80211_frame_min *wh) 1916 #endif 1917 { 1918 struct ieee80211_node_table *nt; 1919 struct ieee80211_node *ni; 1920 1921 nt = &ic->ic_sta; 1922 IEEE80211_NODE_LOCK(nt); 1923 ni = _find_rxnode(nt, wh); 1924 IEEE80211_NODE_UNLOCK(nt); 1925 1926 return ni; 1927 } 1928 1929 /* 1930 * Like ieee80211_find_rxnode but use the supplied h/w 1931 * key index as a hint to locate the node in the key 1932 * mapping table. If an entry is present at the key 1933 * index we return it; otherwise do a normal lookup and 1934 * update the mapping table if the station has a unicast 1935 * key assigned to it. 1936 */ 1937 struct ieee80211_node * 1938 #ifdef IEEE80211_DEBUG_REFCNT 1939 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1940 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1941 const char *func, int line) 1942 #else 1943 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1944 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1945 #endif 1946 { 1947 struct ieee80211_node_table *nt; 1948 struct ieee80211_node *ni; 1949 1950 nt = &ic->ic_sta; 1951 IEEE80211_NODE_LOCK(nt); 1952 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1953 ni = nt->nt_keyixmap[keyix]; 1954 else 1955 ni = NULL; 1956 if (ni == NULL) { 1957 ni = _find_rxnode(nt, wh); 1958 if (ni != NULL && nt->nt_keyixmap != NULL) { 1959 /* 1960 * If the station has a unicast key cache slot 1961 * assigned update the key->node mapping table. 1962 */ 1963 keyix = ni->ni_ucastkey.wk_rxkeyix; 1964 /* XXX can keyixmap[keyix] != NULL? */ 1965 if (keyix < nt->nt_keyixmax && 1966 nt->nt_keyixmap[keyix] == NULL) { 1967 IEEE80211_DPRINTF(ni->ni_vap, 1968 IEEE80211_MSG_NODE, 1969 "%s: add key map entry %p<%s> refcnt %d\n", 1970 __func__, ni, ether_sprintf(ni->ni_macaddr), 1971 ieee80211_node_refcnt(ni)+1); 1972 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1973 } 1974 } 1975 } else { 1976 if (IS_BCAST_PROBEREQ(wh)) 1977 ni = NULL; /* spam bcast probe req to all vap's */ 1978 else 1979 ieee80211_ref_node(ni); 1980 } 1981 IEEE80211_NODE_UNLOCK(nt); 1982 1983 return ni; 1984 } 1985 #undef IS_BCAST_PROBEREQ 1986 #undef IS_PROBEREQ 1987 1988 /* 1989 * Return a reference to the appropriate node for sending 1990 * a data frame. This handles node discovery in adhoc networks. 1991 */ 1992 struct ieee80211_node * 1993 #ifdef IEEE80211_DEBUG_REFCNT 1994 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1995 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1996 const char *func, int line) 1997 #else 1998 ieee80211_find_txnode(struct ieee80211vap *vap, 1999 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 2000 #endif 2001 { 2002 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2003 struct ieee80211_node *ni; 2004 2005 /* 2006 * The destination address should be in the node table 2007 * unless this is a multicast/broadcast frame. We can 2008 * also optimize station mode operation, all frames go 2009 * to the bss node. 2010 */ 2011 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2012 IEEE80211_NODE_LOCK(nt); 2013 if (vap->iv_opmode == IEEE80211_M_STA || 2014 vap->iv_opmode == IEEE80211_M_WDS || 2015 IEEE80211_IS_MULTICAST(macaddr)) 2016 ni = ieee80211_ref_node(vap->iv_bss); 2017 else 2018 ni = ieee80211_find_node_locked(nt, macaddr); 2019 IEEE80211_NODE_UNLOCK(nt); 2020 2021 if (ni == NULL) { 2022 if (vap->iv_opmode == IEEE80211_M_IBSS || 2023 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2024 /* 2025 * In adhoc mode cons up a node for the destination. 2026 * Note that we need an additional reference for the 2027 * caller to be consistent with 2028 * ieee80211_find_node_locked. 2029 */ 2030 /* 2031 * XXX TODO: this doesn't fake up 11n state; we need 2032 * to find another way to get it upgraded. 2033 */ 2034 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2035 if (ni != NULL) 2036 (void) ieee80211_ref_node(ni); 2037 } else { 2038 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2039 "no node, discard frame (%s)", __func__); 2040 vap->iv_stats.is_tx_nonode++; 2041 } 2042 } 2043 return ni; 2044 } 2045 2046 static void 2047 _ieee80211_free_node(struct ieee80211_node *ni) 2048 { 2049 struct ieee80211_node_table *nt = ni->ni_table; 2050 2051 /* 2052 * NB: careful about referencing the vap as it may be 2053 * gone if the last reference was held by a driver. 2054 * We know the com will always be present so it's safe 2055 * to use ni_ic below to reclaim resources. 2056 */ 2057 #if 0 2058 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2059 "%s %p<%s> in %s table\n", __func__, ni, 2060 ether_sprintf(ni->ni_macaddr), 2061 nt != NULL ? nt->nt_name : "<gone>"); 2062 #endif 2063 if (ni->ni_associd != 0) { 2064 struct ieee80211vap *vap = ni->ni_vap; 2065 if (vap->iv_aid_bitmap != NULL) 2066 IEEE80211_AID_CLR(vap, ni->ni_associd); 2067 } 2068 if (nt != NULL) 2069 ieee80211_del_node_nt(nt, ni); 2070 ni->ni_ic->ic_node_free(ni); 2071 } 2072 2073 /* 2074 * Clear any entry in the unicast key mapping table. 2075 */ 2076 static int 2077 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2078 { 2079 ieee80211_keyix keyix; 2080 2081 keyix = ni->ni_ucastkey.wk_rxkeyix; 2082 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2083 nt->nt_keyixmap[keyix] == ni) { 2084 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2085 "%s: %p<%s> clear key map entry %u\n", 2086 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2087 nt->nt_keyixmap[keyix] = NULL; 2088 ieee80211_node_decref(ni); 2089 return 1; 2090 } 2091 2092 return 0; 2093 } 2094 2095 void 2096 #ifdef IEEE80211_DEBUG_REFCNT 2097 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 2098 #else 2099 ieee80211_free_node(struct ieee80211_node *ni) 2100 #endif 2101 { 2102 struct ieee80211_node_table *nt = ni->ni_table; 2103 2104 #ifdef IEEE80211_DEBUG_REFCNT 2105 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2106 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2107 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2108 #endif 2109 if (nt != NULL) { 2110 IEEE80211_NODE_LOCK(nt); 2111 if (ieee80211_node_dectestref(ni)) { 2112 /* 2113 * Last reference, reclaim state. 2114 */ 2115 _ieee80211_free_node(ni); 2116 } else if (ieee80211_node_refcnt(ni) == 1) 2117 if (node_clear_keyixmap(nt, ni)) 2118 _ieee80211_free_node(ni); 2119 IEEE80211_NODE_UNLOCK(nt); 2120 } else { 2121 if (ieee80211_node_dectestref(ni)) 2122 _ieee80211_free_node(ni); 2123 } 2124 } 2125 2126 /* 2127 * Reclaim a unicast key and clear any key cache state. 2128 */ 2129 int 2130 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2131 { 2132 struct ieee80211com *ic = ni->ni_ic; 2133 struct ieee80211_node_table *nt = &ic->ic_sta; 2134 struct ieee80211_node *nikey; 2135 ieee80211_keyix keyix; 2136 int isowned, status; 2137 2138 /* 2139 * NB: We must beware of LOR here; deleting the key 2140 * can cause the crypto layer to block traffic updates 2141 * which can generate a LOR against the node table lock; 2142 * grab it here and stash the key index for our use below. 2143 * 2144 * Must also beware of recursion on the node table lock. 2145 * When called from node_cleanup we may already have 2146 * the node table lock held. Unfortunately there's no 2147 * way to separate out this path so we must do this 2148 * conditionally. 2149 */ 2150 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2151 if (!isowned) 2152 IEEE80211_NODE_LOCK(nt); 2153 nikey = NULL; 2154 status = 1; /* NB: success */ 2155 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2156 keyix = ni->ni_ucastkey.wk_rxkeyix; 2157 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2158 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2159 nikey = nt->nt_keyixmap[keyix]; 2160 nt->nt_keyixmap[keyix] = NULL; 2161 } 2162 } 2163 if (!isowned) 2164 IEEE80211_NODE_UNLOCK(nt); 2165 2166 if (nikey != NULL) { 2167 KASSERT(nikey == ni, 2168 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2169 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2170 "%s: delete key map entry %p<%s> refcnt %d\n", 2171 __func__, ni, ether_sprintf(ni->ni_macaddr), 2172 ieee80211_node_refcnt(ni)-1); 2173 ieee80211_free_node(ni); 2174 } 2175 return status; 2176 } 2177 2178 /* 2179 * Reclaim a node. If this is the last reference count then 2180 * do the normal free work. Otherwise remove it from the node 2181 * table and mark it gone by clearing the back-reference. 2182 */ 2183 static void 2184 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2185 { 2186 2187 IEEE80211_NODE_LOCK_ASSERT(nt); 2188 2189 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2190 "%s: remove %p<%s> from %s table, refcnt %d\n", 2191 __func__, ni, ether_sprintf(ni->ni_macaddr), 2192 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2193 /* 2194 * Clear any entry in the unicast key mapping table. 2195 * We need to do it here so rx lookups don't find it 2196 * in the mapping table even if it's not in the hash 2197 * table. We cannot depend on the mapping table entry 2198 * being cleared because the node may not be free'd. 2199 */ 2200 (void)node_clear_keyixmap(nt, ni); 2201 if (!ieee80211_node_dectestref(ni)) { 2202 /* 2203 * Other references are present, just remove the 2204 * node from the table so it cannot be found. When 2205 * the references are dropped storage will be 2206 * reclaimed. 2207 */ 2208 ieee80211_del_node_nt(nt, ni); 2209 } else 2210 _ieee80211_free_node(ni); 2211 } 2212 2213 /* 2214 * Node table support. 2215 */ 2216 2217 static void 2218 ieee80211_node_table_init(struct ieee80211com *ic, 2219 struct ieee80211_node_table *nt, 2220 const char *name, int inact, int keyixmax) 2221 { 2222 2223 nt->nt_ic = ic; 2224 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2225 TAILQ_INIT(&nt->nt_node); 2226 nt->nt_count = 0; 2227 nt->nt_name = name; 2228 nt->nt_inact_init = inact; 2229 nt->nt_keyixmax = keyixmax; 2230 if (nt->nt_keyixmax > 0) { 2231 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2232 keyixmax * sizeof(struct ieee80211_node *), 2233 M_80211_NODE, 2234 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2235 if (nt->nt_keyixmap == NULL) 2236 ic_printf(ic, 2237 "Cannot allocate key index map with %u entries\n", 2238 keyixmax); 2239 } else 2240 nt->nt_keyixmap = NULL; 2241 } 2242 2243 static void 2244 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2245 struct ieee80211vap *match) 2246 { 2247 struct ieee80211_node *ni, *next; 2248 2249 IEEE80211_NODE_LOCK(nt); 2250 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2251 if (match != NULL && ni->ni_vap != match) 2252 continue; 2253 /* XXX can this happen? if so need's work */ 2254 if (ni->ni_associd != 0) { 2255 struct ieee80211vap *vap = ni->ni_vap; 2256 2257 if (vap->iv_auth->ia_node_leave != NULL) 2258 vap->iv_auth->ia_node_leave(ni); 2259 if (vap->iv_aid_bitmap != NULL) 2260 IEEE80211_AID_CLR(vap, ni->ni_associd); 2261 } 2262 ni->ni_wdsvap = NULL; /* clear reference */ 2263 node_reclaim(nt, ni); 2264 } 2265 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2266 /* 2267 * Make a separate pass to clear references to this vap 2268 * held by DWDS entries. They will not be matched above 2269 * because ni_vap will point to the ap vap but we still 2270 * need to clear ni_wdsvap when the WDS vap is destroyed 2271 * and/or reset. 2272 */ 2273 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2274 if (ni->ni_wdsvap == match) 2275 ni->ni_wdsvap = NULL; 2276 } 2277 IEEE80211_NODE_UNLOCK(nt); 2278 } 2279 2280 static void 2281 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2282 { 2283 ieee80211_node_table_reset(nt, NULL); 2284 if (nt->nt_keyixmap != NULL) { 2285 #ifdef DIAGNOSTIC 2286 /* XXX verify all entries are NULL */ 2287 int i; 2288 for (i = 0; i < nt->nt_keyixmax; i++) 2289 if (nt->nt_keyixmap[i] != NULL) 2290 printf("%s: %s[%u] still active\n", __func__, 2291 nt->nt_name, i); 2292 #endif 2293 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2294 nt->nt_keyixmap = NULL; 2295 } 2296 IEEE80211_NODE_LOCK_DESTROY(nt); 2297 } 2298 2299 static void 2300 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2301 { 2302 struct ieee80211com *ic = ni->ni_ic; 2303 struct ieee80211vap *vap = ni->ni_vap; 2304 2305 /* 2306 * Only process stations when in RUN state. This 2307 * insures, for example, that we don't timeout an 2308 * inactive station during CAC. Note that CSA state 2309 * is actually handled in ieee80211_node_timeout as 2310 * it applies to more than timeout processing. 2311 */ 2312 if (vap->iv_state != IEEE80211_S_RUN) 2313 return; 2314 /* 2315 * Ignore entries for which have yet to receive an 2316 * authentication frame. These are transient and 2317 * will be reclaimed when the last reference to them 2318 * goes away (when frame xmits complete). 2319 */ 2320 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2321 vap->iv_opmode == IEEE80211_M_STA) && 2322 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2323 return; 2324 /* 2325 * Free fragment if not needed anymore 2326 * (last fragment older than 1s). 2327 * XXX doesn't belong here, move to node_age 2328 */ 2329 if (ni->ni_rxfrag[0] != NULL && 2330 ticks > ni->ni_rxfragstamp + hz) { 2331 m_freem(ni->ni_rxfrag[0]); 2332 ni->ni_rxfrag[0] = NULL; 2333 } 2334 if (ni->ni_inact > 0) { 2335 ni->ni_inact--; 2336 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2337 "%s: inact %u inact_reload %u nrates %u", 2338 __func__, ni->ni_inact, ni->ni_inact_reload, 2339 ni->ni_rates.rs_nrates); 2340 } 2341 /* 2342 * Special case ourself; we may be idle for extended periods 2343 * of time and regardless reclaiming our state is wrong. 2344 * XXX run ic_node_age 2345 */ 2346 /* XXX before inact decrement? */ 2347 if (ni == vap->iv_bss) 2348 return; 2349 if (ni->ni_associd != 0 || 2350 (vap->iv_opmode == IEEE80211_M_IBSS || 2351 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2352 /* 2353 * Age/drain resources held by the station. 2354 */ 2355 ic->ic_node_age(ni); 2356 /* 2357 * Probe the station before time it out. We 2358 * send a null data frame which may not be 2359 * universally supported by drivers (need it 2360 * for ps-poll support so it should be...). 2361 * 2362 * XXX don't probe the station unless we've 2363 * received a frame from them (and have 2364 * some idea of the rates they are capable 2365 * of); this will get fixed more properly 2366 * soon with better handling of the rate set. 2367 */ 2368 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2369 (0 < ni->ni_inact && 2370 ni->ni_inact <= vap->iv_inact_probe) && 2371 ni->ni_rates.rs_nrates != 0) { 2372 IEEE80211_NOTE(vap, 2373 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2374 ni, "%s", 2375 "probe station due to inactivity"); 2376 /* 2377 * Grab a reference so the node cannot 2378 * be reclaimed before we send the frame. 2379 * ieee80211_send_nulldata understands 2380 * we've done this and reclaims the 2381 * ref for us as needed. 2382 */ 2383 /* XXX fix this (not required anymore). */ 2384 ieee80211_ref_node(ni); 2385 /* XXX useless */ 2386 ieee80211_send_nulldata(ni); 2387 /* XXX stat? */ 2388 return; 2389 } 2390 } 2391 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2392 ni->ni_inact <= 0) { 2393 IEEE80211_NOTE(vap, 2394 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2395 "station timed out due to inactivity " 2396 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2397 /* 2398 * Send a deauthenticate frame and drop the station. 2399 * This is somewhat complicated due to reference counts 2400 * and locking. At this point a station will typically 2401 * have a reference count of 2. ieee80211_node_leave 2402 * will do a "free" of the node which will drop the 2403 * reference count. But in the meantime a reference 2404 * wil be held by the deauth frame. The actual reclaim 2405 * of the node will happen either after the tx is 2406 * completed or by ieee80211_node_leave. 2407 */ 2408 if (ni->ni_associd != 0) { 2409 IEEE80211_SEND_MGMT(ni, 2410 IEEE80211_FC0_SUBTYPE_DEAUTH, 2411 IEEE80211_REASON_AUTH_EXPIRE); 2412 } 2413 ieee80211_node_leave(ni); 2414 vap->iv_stats.is_node_timeout++; 2415 } 2416 } 2417 2418 /* 2419 * Timeout inactive stations and do related housekeeping. 2420 */ 2421 static void 2422 ieee80211_timeout_stations(struct ieee80211com *ic) 2423 { 2424 struct ieee80211_node_table *nt = &ic->ic_sta; 2425 2426 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2427 } 2428 2429 /* 2430 * Aggressively reclaim resources. This should be used 2431 * only in a critical situation to reclaim mbuf resources. 2432 */ 2433 void 2434 ieee80211_drain(struct ieee80211com *ic) 2435 { 2436 struct ieee80211_node_table *nt = &ic->ic_sta; 2437 struct ieee80211vap *vap; 2438 struct ieee80211_node *ni; 2439 2440 IEEE80211_NODE_LOCK(nt); 2441 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2442 /* 2443 * Ignore entries for which have yet to receive an 2444 * authentication frame. These are transient and 2445 * will be reclaimed when the last reference to them 2446 * goes away (when frame xmits complete). 2447 */ 2448 vap = ni->ni_vap; 2449 /* 2450 * Only process stations when in RUN state. This 2451 * insures, for example, that we don't timeout an 2452 * inactive station during CAC. Note that CSA state 2453 * is actually handled in ieee80211_node_timeout as 2454 * it applies to more than timeout processing. 2455 */ 2456 if (vap->iv_state != IEEE80211_S_RUN) 2457 continue; 2458 /* XXX can vap be NULL? */ 2459 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2460 vap->iv_opmode == IEEE80211_M_STA) && 2461 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2462 continue; 2463 /* 2464 * Free fragments. 2465 * XXX doesn't belong here, move to node_drain 2466 */ 2467 if (ni->ni_rxfrag[0] != NULL) { 2468 m_freem(ni->ni_rxfrag[0]); 2469 ni->ni_rxfrag[0] = NULL; 2470 } 2471 /* 2472 * Drain resources held by the station. 2473 */ 2474 ic->ic_node_drain(ni); 2475 } 2476 IEEE80211_NODE_UNLOCK(nt); 2477 } 2478 2479 /* 2480 * Per-ieee80211com inactivity timer callback. 2481 */ 2482 void 2483 ieee80211_node_timeout(void *arg) 2484 { 2485 struct ieee80211com *ic = arg; 2486 2487 /* 2488 * Defer timeout processing if a channel switch is pending. 2489 * We typically need to be mute so not doing things that 2490 * might generate frames is good to handle in one place. 2491 * Suppressing the station timeout processing may extend the 2492 * lifetime of inactive stations (by not decrementing their 2493 * idle counters) but this should be ok unless the CSA is 2494 * active for an unusually long time. 2495 */ 2496 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2497 ieee80211_scan_timeout(ic); 2498 ieee80211_timeout_stations(ic); 2499 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2500 2501 IEEE80211_LOCK(ic); 2502 ieee80211_erp_timeout(ic); 2503 ieee80211_ht_timeout(ic); 2504 ieee80211_vht_timeout(ic); 2505 IEEE80211_UNLOCK(ic); 2506 } 2507 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2508 ieee80211_node_timeout, ic); 2509 } 2510 2511 /* 2512 * The same as ieee80211_iterate_nodes(), but for one vap only. 2513 */ 2514 int 2515 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2516 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2517 { 2518 struct ieee80211_node **ni_arr; 2519 struct ieee80211_node *ni; 2520 size_t size; 2521 int count, i; 2522 2523 /* 2524 * Iterate over the node table and save an array of ref'ed nodes. 2525 * 2526 * This is separated out from calling the actual node function so that 2527 * no LORs will occur. 2528 */ 2529 IEEE80211_NODE_LOCK(nt); 2530 count = nt->nt_count; 2531 size = count * sizeof(struct ieee80211_node *); 2532 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2533 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2534 if (ni_arr == NULL) { 2535 IEEE80211_NODE_UNLOCK(nt); 2536 return (ENOMEM); 2537 } 2538 2539 i = 0; 2540 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2541 if (vap != NULL && ni->ni_vap != vap) 2542 continue; 2543 KASSERT(i < count, 2544 ("node array overflow (vap %p, i %d, count %d)\n", 2545 vap, i, count)); 2546 ni_arr[i] = ieee80211_ref_node(ni); 2547 i++; 2548 } 2549 IEEE80211_NODE_UNLOCK(nt); 2550 2551 for (i = 0; i < count; i++) { 2552 if (ni_arr[i] == NULL) /* end of the list */ 2553 break; 2554 (*f)(arg, ni_arr[i]); 2555 /* ieee80211_free_node() locks by itself */ 2556 ieee80211_free_node(ni_arr[i]); 2557 } 2558 2559 IEEE80211_FREE(ni_arr, M_80211_NODE); 2560 2561 return (0); 2562 } 2563 2564 /* 2565 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2566 * reference in the source. 2567 */ 2568 void 2569 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2570 ieee80211_iter_func *f, void *arg) 2571 { 2572 /* XXX no way to pass error to the caller. */ 2573 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2574 } 2575 2576 void 2577 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2578 { 2579 printf("0x%p: mac %s refcnt %d\n", ni, 2580 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2581 printf("\tauthmode %u flags 0x%x\n", 2582 ni->ni_authmode, ni->ni_flags); 2583 printf("\tassocid 0x%x txpower %u vlan %u\n", 2584 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2585 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2586 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2587 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2588 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2589 ni->ni_rxfragstamp); 2590 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2591 node_getrssi(ni), ni->ni_noise, 2592 ni->ni_intval, ni->ni_capinfo); 2593 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2594 ether_sprintf(ni->ni_bssid), 2595 ni->ni_esslen, ni->ni_essid, 2596 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2597 printf("\tinact %u inact_reload %u txrate %u\n", 2598 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2599 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2600 ni->ni_htcap, ni->ni_htparam, 2601 ni->ni_htctlchan, ni->ni_ht2ndchan); 2602 printf("\thtopmode %x htstbc %x htchw %u\n", 2603 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2604 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2605 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2606 (int) ni->ni_vht_basicmcs); 2607 /* XXX VHT state */ 2608 } 2609 2610 void 2611 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2612 { 2613 ieee80211_iterate_nodes(nt, 2614 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2615 } 2616 2617 static void 2618 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2619 { 2620 struct ieee80211vap *vap; 2621 2622 IEEE80211_LOCK_ASSERT(ic); 2623 2624 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2625 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2626 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2627 } 2628 2629 void 2630 ieee80211_notify_erp(struct ieee80211com *ic) 2631 { 2632 IEEE80211_LOCK(ic); 2633 ieee80211_notify_erp_locked(ic); 2634 IEEE80211_UNLOCK(ic); 2635 } 2636 2637 /* 2638 * Handle a station joining an 11g network. 2639 */ 2640 static void 2641 ieee80211_node_join_11g(struct ieee80211_node *ni) 2642 { 2643 struct ieee80211com *ic = ni->ni_ic; 2644 2645 IEEE80211_LOCK_ASSERT(ic); 2646 2647 /* 2648 * Station isn't capable of short slot time. Bump 2649 * the count of long slot time stations and disable 2650 * use of short slot time. Note that the actual switch 2651 * over to long slot time use may not occur until the 2652 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2653 */ 2654 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2655 ic->ic_longslotsta++; 2656 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2657 "station needs long slot time, count %d", 2658 ic->ic_longslotsta); 2659 /* XXX vap's w/ conflicting needs won't work */ 2660 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2661 /* 2662 * Don't force slot time when switched to turbo 2663 * mode as non-ERP stations won't be present; this 2664 * need only be done when on the normal G channel. 2665 */ 2666 ieee80211_set_shortslottime(ic, 0); 2667 } 2668 } 2669 /* 2670 * If the new station is not an ERP station 2671 * then bump the counter and enable protection 2672 * if configured. 2673 */ 2674 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2675 ic->ic_nonerpsta++; 2676 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2677 "station is !ERP, %d non-ERP stations associated", 2678 ic->ic_nonerpsta); 2679 /* 2680 * If station does not support short preamble 2681 * then we must enable use of Barker preamble. 2682 */ 2683 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2684 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2685 "%s", "station needs long preamble"); 2686 ic->ic_flags |= IEEE80211_F_USEBARKER; 2687 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2688 } 2689 /* 2690 * If protection is configured and this is the first 2691 * indication we should use protection, enable it. 2692 */ 2693 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2694 ic->ic_nonerpsta == 1 && 2695 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2696 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2697 "%s: enable use of protection\n", __func__); 2698 ic->ic_flags |= IEEE80211_F_USEPROT; 2699 ieee80211_notify_erp_locked(ic); 2700 } 2701 } else 2702 ni->ni_flags |= IEEE80211_NODE_ERP; 2703 } 2704 2705 void 2706 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2707 { 2708 struct ieee80211com *ic = ni->ni_ic; 2709 struct ieee80211vap *vap = ni->ni_vap; 2710 int newassoc; 2711 2712 if (ni->ni_associd == 0) { 2713 uint16_t aid; 2714 2715 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2716 /* 2717 * It would be good to search the bitmap 2718 * more efficiently, but this will do for now. 2719 */ 2720 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2721 if (!IEEE80211_AID_ISSET(vap, aid)) 2722 break; 2723 } 2724 if (aid >= vap->iv_max_aid) { 2725 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2726 ieee80211_node_leave(ni); 2727 return; 2728 } 2729 ni->ni_associd = aid | 0xc000; 2730 ni->ni_jointime = time_uptime; 2731 IEEE80211_LOCK(ic); 2732 IEEE80211_AID_SET(vap, ni->ni_associd); 2733 vap->iv_sta_assoc++; 2734 ic->ic_sta_assoc++; 2735 2736 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2737 ieee80211_ht_node_join(ni); 2738 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2739 ieee80211_vht_node_join(ni); 2740 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2741 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2742 ieee80211_node_join_11g(ni); 2743 IEEE80211_UNLOCK(ic); 2744 2745 newassoc = 1; 2746 } else 2747 newassoc = 0; 2748 2749 /* 2750 * XXX VHT - should log VHT channel width, etc 2751 */ 2752 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2753 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2754 IEEE80211_NODE_AID(ni), 2755 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2756 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2757 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2758 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2759 /* XXX update for VHT string */ 2760 ni->ni_flags & IEEE80211_NODE_HT ? 2761 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2762 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2763 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2764 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2765 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2766 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2767 ", fast-frames" : "", 2768 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2769 ", turbo" : "" 2770 ); 2771 2772 ieee80211_node_setuptxparms(ni); 2773 ieee80211_ratectl_node_init(ni); 2774 /* give driver a chance to setup state like ni_txrate */ 2775 if (ic->ic_newassoc != NULL) 2776 ic->ic_newassoc(ni, newassoc); 2777 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2778 /* tell the authenticator about new station */ 2779 if (vap->iv_auth->ia_node_join != NULL) 2780 vap->iv_auth->ia_node_join(ni); 2781 ieee80211_notify_node_join(ni, 2782 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2783 } 2784 2785 static void 2786 disable_protection(struct ieee80211com *ic) 2787 { 2788 KASSERT(ic->ic_nonerpsta == 0 && 2789 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2790 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2791 ic->ic_flags_ext)); 2792 2793 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2794 /* XXX verify mode? */ 2795 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2796 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2797 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2798 } 2799 ieee80211_notify_erp_locked(ic); 2800 } 2801 2802 /* 2803 * Handle a station leaving an 11g network. 2804 */ 2805 static void 2806 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2807 { 2808 struct ieee80211com *ic = ni->ni_ic; 2809 2810 IEEE80211_LOCK_ASSERT(ic); 2811 2812 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2813 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2814 ic->ic_bsschan->ic_flags)); 2815 2816 /* 2817 * If a long slot station do the slot time bookkeeping. 2818 */ 2819 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2820 KASSERT(ic->ic_longslotsta > 0, 2821 ("bogus long slot station count %d", ic->ic_longslotsta)); 2822 ic->ic_longslotsta--; 2823 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2824 "long slot time station leaves, count now %d", 2825 ic->ic_longslotsta); 2826 if (ic->ic_longslotsta == 0) { 2827 /* 2828 * Re-enable use of short slot time if supported 2829 * and not operating in IBSS mode (per spec). 2830 */ 2831 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2832 ic->ic_opmode != IEEE80211_M_IBSS) { 2833 IEEE80211_DPRINTF(ni->ni_vap, 2834 IEEE80211_MSG_ASSOC, 2835 "%s: re-enable use of short slot time\n", 2836 __func__); 2837 ieee80211_set_shortslottime(ic, 1); 2838 } 2839 } 2840 } 2841 /* 2842 * If a non-ERP station do the protection-related bookkeeping. 2843 */ 2844 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2845 KASSERT(ic->ic_nonerpsta > 0, 2846 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2847 ic->ic_nonerpsta--; 2848 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2849 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2850 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2851 " (non-ERP sta present)" : ""); 2852 if (ic->ic_nonerpsta == 0 && 2853 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2854 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2855 "%s: disable use of protection\n", __func__); 2856 disable_protection(ic); 2857 } 2858 } 2859 } 2860 2861 /* 2862 * Time out presence of an overlapping bss with non-ERP 2863 * stations. When operating in hostap mode we listen for 2864 * beacons from other stations and if we identify a non-ERP 2865 * station is present we enable protection. To identify 2866 * when all non-ERP stations are gone we time out this 2867 * condition. 2868 */ 2869 static void 2870 ieee80211_erp_timeout(struct ieee80211com *ic) 2871 { 2872 2873 IEEE80211_LOCK_ASSERT(ic); 2874 2875 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2876 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2877 #if 0 2878 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2879 "%s", "age out non-ERP sta present on channel"); 2880 #endif 2881 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2882 if (ic->ic_nonerpsta == 0) 2883 disable_protection(ic); 2884 } 2885 } 2886 2887 /* 2888 * Handle bookkeeping for station deauthentication/disassociation 2889 * when operating as an ap. 2890 */ 2891 void 2892 ieee80211_node_leave(struct ieee80211_node *ni) 2893 { 2894 struct ieee80211com *ic = ni->ni_ic; 2895 struct ieee80211vap *vap = ni->ni_vap; 2896 struct ieee80211_node_table *nt = ni->ni_table; 2897 2898 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2899 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2900 2901 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2902 ("unexpected operating mode %u", vap->iv_opmode)); 2903 /* 2904 * If node wasn't previously associated all 2905 * we need to do is reclaim the reference. 2906 */ 2907 /* XXX ibss mode bypasses 11g and notification */ 2908 if (ni->ni_associd == 0) 2909 goto done; 2910 /* 2911 * Tell the authenticator the station is leaving. 2912 * Note that we must do this before yanking the 2913 * association id as the authenticator uses the 2914 * associd to locate it's state block. 2915 */ 2916 if (vap->iv_auth->ia_node_leave != NULL) 2917 vap->iv_auth->ia_node_leave(ni); 2918 2919 IEEE80211_LOCK(ic); 2920 IEEE80211_AID_CLR(vap, ni->ni_associd); 2921 vap->iv_sta_assoc--; 2922 ic->ic_sta_assoc--; 2923 2924 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2925 ieee80211_vht_node_leave(ni); 2926 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2927 ieee80211_ht_node_leave(ni); 2928 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2929 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2930 ieee80211_node_leave_11g(ni); 2931 IEEE80211_UNLOCK(ic); 2932 /* 2933 * Cleanup station state. In particular clear various 2934 * state that might otherwise be reused if the node 2935 * is reused before the reference count goes to zero 2936 * (and memory is reclaimed). 2937 */ 2938 ieee80211_sta_leave(ni); 2939 done: 2940 /* 2941 * Remove the node from any table it's recorded in and 2942 * drop the caller's reference. Removal from the table 2943 * is important to insure the node is not reprocessed 2944 * for inactivity. 2945 */ 2946 if (nt != NULL) { 2947 IEEE80211_NODE_LOCK(nt); 2948 node_reclaim(nt, ni); 2949 IEEE80211_NODE_UNLOCK(nt); 2950 } else 2951 ieee80211_free_node(ni); 2952 } 2953 2954 struct rssiinfo { 2955 int rssi_samples; 2956 uint32_t rssi_total; 2957 }; 2958 2959 static void 2960 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2961 { 2962 struct rssiinfo *info = arg; 2963 struct ieee80211vap *vap = ni->ni_vap; 2964 int8_t rssi; 2965 2966 /* only associated stations */ 2967 if (ni->ni_associd == 0) 2968 return; 2969 rssi = vap->iv_ic->ic_node_getrssi(ni); 2970 if (rssi != 0) { 2971 info->rssi_samples++; 2972 info->rssi_total += rssi; 2973 } 2974 } 2975 2976 static void 2977 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2978 { 2979 struct rssiinfo *info = arg; 2980 struct ieee80211vap *vap = ni->ni_vap; 2981 int8_t rssi; 2982 2983 /* only neighbors */ 2984 /* XXX check bssid */ 2985 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2986 return; 2987 rssi = vap->iv_ic->ic_node_getrssi(ni); 2988 if (rssi != 0) { 2989 info->rssi_samples++; 2990 info->rssi_total += rssi; 2991 } 2992 } 2993 2994 #ifdef IEEE80211_SUPPORT_MESH 2995 static void 2996 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2997 { 2998 struct rssiinfo *info = arg; 2999 struct ieee80211vap *vap = ni->ni_vap; 3000 int8_t rssi; 3001 3002 /* only neighbors that peered successfully */ 3003 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3004 return; 3005 rssi = vap->iv_ic->ic_node_getrssi(ni); 3006 if (rssi != 0) { 3007 info->rssi_samples++; 3008 info->rssi_total += rssi; 3009 } 3010 } 3011 #endif /* IEEE80211_SUPPORT_MESH */ 3012 3013 int8_t 3014 ieee80211_getrssi(struct ieee80211vap *vap) 3015 { 3016 #define NZ(x) ((x) == 0 ? 1 : (x)) 3017 struct ieee80211com *ic = vap->iv_ic; 3018 struct rssiinfo info; 3019 3020 info.rssi_total = 0; 3021 info.rssi_samples = 0; 3022 switch (vap->iv_opmode) { 3023 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3024 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3025 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3026 &info); 3027 break; 3028 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3029 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3030 &info); 3031 break; 3032 #ifdef IEEE80211_SUPPORT_MESH 3033 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3034 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3035 &info); 3036 break; 3037 #endif 3038 case IEEE80211_M_MONITOR: /* XXX */ 3039 case IEEE80211_M_STA: /* use stats from associated ap */ 3040 default: 3041 if (vap->iv_bss != NULL) 3042 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3043 info.rssi_samples = 1; 3044 break; 3045 } 3046 return info.rssi_total / NZ(info.rssi_samples); 3047 #undef NZ 3048 } 3049 3050 void 3051 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3052 { 3053 3054 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3055 return; 3056 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3057 /* for non-station mode return avg'd rssi accounting */ 3058 if (vap->iv_opmode != IEEE80211_M_STA) 3059 *rssi = ieee80211_getrssi(vap); 3060 } 3061