1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 #include "opt_wlan.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/mbuf.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 38 #include <sys/socket.h> 39 40 #include <net/if.h> 41 #include <net/if_var.h> 42 #include <net/if_media.h> 43 #include <net/ethernet.h> 44 45 #include <net80211/ieee80211_var.h> 46 #include <net80211/ieee80211_input.h> 47 #ifdef IEEE80211_SUPPORT_SUPERG 48 #include <net80211/ieee80211_superg.h> 49 #endif 50 #ifdef IEEE80211_SUPPORT_TDMA 51 #include <net80211/ieee80211_tdma.h> 52 #endif 53 #include <net80211/ieee80211_wds.h> 54 #include <net80211/ieee80211_mesh.h> 55 #include <net80211/ieee80211_ratectl.h> 56 #include <net80211/ieee80211_vht.h> 57 58 #include <net/bpf.h> 59 60 #ifdef IEEE80211_DEBUG_REFCNT 61 #define __debrefcnt_used 62 #else 63 #define __debrefcnt_used __unused 64 #endif 65 66 /* 67 * IEEE80211_NODE_HASHSIZE must be a power of 2. 68 */ 69 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 70 71 /* 72 * Association id's are managed with a bit vector. 73 */ 74 #define IEEE80211_AID_SET(_vap, b) \ 75 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 76 (1 << (IEEE80211_AID(b) % 32))) 77 #define IEEE80211_AID_CLR(_vap, b) \ 78 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 79 ~(1 << (IEEE80211_AID(b) % 32))) 80 #define IEEE80211_AID_ISSET(_vap, b) \ 81 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 82 83 static int ieee80211_sta_join1(struct ieee80211_node *); 84 85 static struct ieee80211_node *ieee80211_alloc_node( 86 struct ieee80211_node_table *, struct ieee80211vap *, 87 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *, int); 88 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 89 const uint8_t [IEEE80211_ADDR_LEN]); 90 static int node_init(struct ieee80211_node *); 91 static void node_cleanup(struct ieee80211_node *); 92 static void node_free(struct ieee80211_node *); 93 static void node_age(struct ieee80211_node *); 94 static int8_t node_getrssi(const struct ieee80211_node *); 95 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 96 static void node_getmimoinfo(const struct ieee80211_node *, 97 struct ieee80211_mimo_info *); 98 99 static void __ieee80211_free_node(struct ieee80211_node *); 100 101 static void node_reclaim(struct ieee80211_node_table *nt, 102 struct ieee80211_node *ni); 103 static void ieee80211_node_table_init(struct ieee80211com *ic, 104 struct ieee80211_node_table *nt, const char *name, 105 int inact, int keymaxix); 106 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 107 struct ieee80211vap *); 108 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 109 static void ieee80211_vap_erp_timeout(struct ieee80211vap *); 110 111 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 112 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 113 114 void 115 ieee80211_node_attach(struct ieee80211com *ic) 116 { 117 /* XXX really want maxlen enforced per-sta */ 118 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 119 "802.11 staging q"); 120 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 121 IEEE80211_INACT_INIT, ic->ic_max_keyix); 122 callout_init(&ic->ic_inact, 1); 123 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 124 ieee80211_node_timeout, ic); 125 126 ic->ic_node_alloc = node_alloc; 127 ic->ic_node_init = node_init; 128 ic->ic_node_free = node_free; 129 ic->ic_node_cleanup = node_cleanup; 130 ic->ic_node_age = node_age; 131 ic->ic_node_drain = node_age; /* NB: same as age */ 132 ic->ic_node_getrssi = node_getrssi; 133 ic->ic_node_getsignal = node_getsignal; 134 ic->ic_node_getmimoinfo = node_getmimoinfo; 135 136 /* 137 * Set flags to be propagated to all vap's; 138 * these define default behaviour/configuration. 139 */ 140 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 141 } 142 143 void 144 ieee80211_node_detach(struct ieee80211com *ic) 145 { 146 147 callout_drain(&ic->ic_inact); 148 ieee80211_node_table_cleanup(&ic->ic_sta); 149 ieee80211_ageq_drain(&ic->ic_stageq); 150 ieee80211_ageq_cleanup(&ic->ic_stageq); 151 } 152 153 void 154 ieee80211_node_vattach(struct ieee80211vap *vap) 155 { 156 /* NB: driver can override */ 157 vap->iv_max_aid = IEEE80211_AID_DEF; 158 159 /* default station inactivity timer settings */ 160 vap->iv_inact_init = IEEE80211_INACT_INIT; 161 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 162 vap->iv_inact_run = IEEE80211_INACT_RUN; 163 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 164 165 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 166 "%s: init %u auth %u run %u probe %u\n", __func__, 167 vap->iv_inact_init, vap->iv_inact_auth, 168 vap->iv_inact_run, vap->iv_inact_probe); 169 } 170 171 void 172 ieee80211_node_latevattach(struct ieee80211vap *vap) 173 { 174 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 175 /* XXX should we allow max aid to be zero? */ 176 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 177 vap->iv_max_aid = IEEE80211_AID_MIN; 178 if_printf(vap->iv_ifp, 179 "WARNING: max aid too small, changed to %d\n", 180 vap->iv_max_aid); 181 } 182 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 183 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 184 M_80211_NODE, 185 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 186 if (vap->iv_aid_bitmap == NULL) { 187 /* XXX no way to recover */ 188 printf("%s: no memory for AID bitmap, max aid %d!\n", 189 __func__, vap->iv_max_aid); 190 vap->iv_max_aid = 0; 191 } 192 } 193 194 ieee80211_reset_bss(vap); 195 196 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 197 } 198 199 void 200 ieee80211_node_vdetach(struct ieee80211vap *vap) 201 { 202 struct ieee80211com *ic = vap->iv_ic; 203 204 ieee80211_node_table_reset(&ic->ic_sta, vap); 205 if (vap->iv_bss != NULL) { 206 ieee80211_free_node(vap->iv_bss); 207 vap->iv_update_bss(vap, NULL); 208 } 209 if (vap->iv_aid_bitmap != NULL) { 210 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 211 vap->iv_aid_bitmap = NULL; 212 } 213 } 214 215 /* 216 * Port authorize/unauthorize interfaces for use by an authenticator. 217 */ 218 219 void 220 ieee80211_node_authorize(struct ieee80211_node *ni) 221 { 222 struct ieee80211vap *vap = ni->ni_vap; 223 224 ni->ni_flags |= IEEE80211_NODE_AUTH; 225 ni->ni_inact_reload = vap->iv_inact_run; 226 ni->ni_inact = ni->ni_inact_reload; 227 228 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 229 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 230 } 231 232 void 233 ieee80211_node_unauthorize(struct ieee80211_node *ni) 234 { 235 struct ieee80211vap *vap = ni->ni_vap; 236 237 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 238 ni->ni_inact_reload = vap->iv_inact_auth; 239 if (ni->ni_inact > ni->ni_inact_reload) 240 ni->ni_inact = ni->ni_inact_reload; 241 242 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 243 "%s: inact_reload %u inact %u", __func__, 244 ni->ni_inact_reload, ni->ni_inact); 245 } 246 247 /* 248 * Fix tx parameters for a node according to ``association state''. 249 */ 250 void 251 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 252 { 253 struct ieee80211vap *vap = ni->ni_vap; 254 enum ieee80211_phymode mode; 255 256 if (ni->ni_flags & IEEE80211_NODE_VHT) { 257 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 258 mode = IEEE80211_MODE_VHT_5GHZ; 259 else 260 mode = IEEE80211_MODE_VHT_2GHZ; 261 } else if (ni->ni_flags & IEEE80211_NODE_HT) { 262 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 263 mode = IEEE80211_MODE_11NA; 264 else 265 mode = IEEE80211_MODE_11NG; 266 } else { /* legacy rate handling */ 267 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 268 mode = IEEE80211_MODE_STURBO_A; 269 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 270 mode = IEEE80211_MODE_HALF; 271 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 272 mode = IEEE80211_MODE_QUARTER; 273 /* NB: 108A should be handled as 11a */ 274 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 275 mode = IEEE80211_MODE_11A; 276 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 277 (ni->ni_flags & IEEE80211_NODE_ERP)) 278 mode = IEEE80211_MODE_11G; 279 else 280 mode = IEEE80211_MODE_11B; 281 } 282 ni->ni_txparms = &vap->iv_txparms[mode]; 283 } 284 285 /* 286 * Set/change the channel. The rate set is also updated as 287 * to insure a consistent view by drivers. 288 * XXX should be private but hostap needs it to deal with CSA 289 */ 290 void 291 ieee80211_node_set_chan(struct ieee80211_node *ni, 292 struct ieee80211_channel *chan) 293 { 294 struct ieee80211com *ic = ni->ni_ic; 295 struct ieee80211vap *vap = ni->ni_vap; 296 enum ieee80211_phymode mode; 297 298 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 299 300 ni->ni_chan = chan; 301 mode = ieee80211_chan2mode(chan); 302 if (IEEE80211_IS_CHAN_HT(chan)) { 303 /* 304 * We must install the legacy rate est in ni_rates and the 305 * HT rate set in ni_htrates. 306 */ 307 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 308 /* 309 * Setup bss tx parameters based on operating mode. We 310 * use legacy rates when operating in a mixed HT+non-HT bss 311 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 312 */ 313 if (mode == IEEE80211_MODE_11NA && 314 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 315 mode = IEEE80211_MODE_11A; 316 else if (mode == IEEE80211_MODE_11NG && 317 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 318 mode = IEEE80211_MODE_11G; 319 if (mode == IEEE80211_MODE_11G && 320 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 321 mode = IEEE80211_MODE_11B; 322 } 323 ni->ni_txparms = &vap->iv_txparms[mode]; 324 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 325 } 326 327 static __inline void 328 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 329 { 330 /* propagate useful state */ 331 nbss->ni_authmode = obss->ni_authmode; 332 nbss->ni_txpower = obss->ni_txpower; 333 nbss->ni_vlan = obss->ni_vlan; 334 /* XXX statistics? */ 335 /* XXX legacy WDS bssid? */ 336 } 337 338 void 339 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 340 { 341 struct ieee80211com *ic = vap->iv_ic; 342 struct ieee80211_node *ni; 343 344 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 345 "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, 346 ieee80211_opmode_name[vap->iv_opmode], 347 ieee80211_chan2ieee(ic, chan), 348 ieee80211_channel_type_char(chan), 349 chan->ic_flags); 350 351 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr, 352 __func__, __LINE__); 353 if (ni == NULL) { 354 /* XXX recovery? */ 355 return; 356 } 357 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 358 ni->ni_esslen = vap->iv_des_ssid[0].len; 359 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 360 if (vap->iv_bss != NULL) 361 copy_bss(ni, vap->iv_bss); 362 ni->ni_intval = ic->ic_bintval; 363 if (vap->iv_flags & IEEE80211_F_PRIVACY) 364 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 365 if (ic->ic_phytype == IEEE80211_T_FH) { 366 ni->ni_fhdwell = 200; /* XXX */ 367 ni->ni_fhindex = 1; 368 } 369 if (vap->iv_opmode == IEEE80211_M_IBSS) { 370 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 371 if (vap->iv_flags & IEEE80211_F_DESBSSID) 372 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 373 else { 374 net80211_get_random_bytes(ni->ni_bssid, 375 IEEE80211_ADDR_LEN); 376 /* clear group bit, add local bit */ 377 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 378 } 379 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 380 if (vap->iv_flags & IEEE80211_F_DESBSSID) 381 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 382 else 383 #ifdef IEEE80211_SUPPORT_TDMA 384 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 385 #endif 386 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 387 #ifdef IEEE80211_SUPPORT_MESH 388 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 389 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 390 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 391 #endif 392 } 393 /* 394 * Fix the channel and related attributes. 395 */ 396 /* clear DFS CAC state on previous channel */ 397 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 398 ic->ic_bsschan->ic_freq != chan->ic_freq && 399 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 400 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 401 ic->ic_bsschan = chan; 402 ieee80211_node_set_chan(ni, chan); 403 ic->ic_curmode = ieee80211_chan2mode(chan); 404 /* 405 * Do mode-specific setup. 406 */ 407 if (IEEE80211_IS_CHAN_FULL(chan)) { 408 if (IEEE80211_IS_CHAN_ANYG(chan)) { 409 /* 410 * Use a mixed 11b/11g basic rate set. 411 */ 412 ieee80211_setbasicrates(&ni->ni_rates, 413 IEEE80211_MODE_11G); 414 if (vap->iv_flags & IEEE80211_F_PUREG) { 415 /* 416 * Also mark OFDM rates basic so 11b 417 * stations do not join (WiFi compliance). 418 */ 419 ieee80211_addbasicrates(&ni->ni_rates, 420 IEEE80211_MODE_11A); 421 } 422 } else if (IEEE80211_IS_CHAN_B(chan)) { 423 /* 424 * Force pure 11b rate set. 425 */ 426 ieee80211_setbasicrates(&ni->ni_rates, 427 IEEE80211_MODE_11B); 428 } 429 } 430 431 /* XXX TODO: other bits and pieces - eg fast-frames? */ 432 433 /* If we're an 11n channel then initialise the 11n bits */ 434 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { 435 /* XXX what else? */ 436 ieee80211_ht_node_init(ni); 437 ieee80211_vht_node_init(ni); 438 } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { 439 /* XXX what else? */ 440 ieee80211_ht_node_init(ni); 441 } 442 443 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 444 } 445 446 /* 447 * Reset bss state on transition to the INIT state. 448 * Clear any stations from the table (they have been 449 * deauth'd) and reset the bss node (clears key, rate 450 * etc. state). 451 */ 452 void 453 ieee80211_reset_bss(struct ieee80211vap *vap) 454 { 455 struct ieee80211com *ic = vap->iv_ic; 456 struct ieee80211_node *ni, *obss; 457 458 ieee80211_node_table_reset(&ic->ic_sta, vap); 459 /* XXX multi-bss: wrong */ 460 ieee80211_vap_reset_erp(vap); 461 462 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr, 463 __func__, __LINE__); 464 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 465 obss = vap->iv_update_bss(vap, ieee80211_ref_node(ni)); 466 if (obss != NULL) { 467 copy_bss(ni, obss); 468 ni->ni_intval = ic->ic_bintval; 469 ieee80211_free_node(obss); 470 } else 471 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 472 } 473 474 static int 475 match_ssid(const struct ieee80211_node *ni, 476 int nssid, const struct ieee80211_scan_ssid ssids[]) 477 { 478 int i; 479 480 for (i = 0; i < nssid; i++) { 481 if (ni->ni_esslen == ssids[i].len && 482 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 483 return 1; 484 } 485 return 0; 486 } 487 488 /* 489 * Test a node for suitability/compatibility. 490 */ 491 static int 492 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 493 { 494 struct ieee80211com *ic = ni->ni_ic; 495 uint8_t rate; 496 497 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 498 return 0; 499 if (vap->iv_opmode == IEEE80211_M_IBSS) { 500 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 501 return 0; 502 } else { 503 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 504 return 0; 505 } 506 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 507 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 508 return 0; 509 } else { 510 /* XXX does this mean privacy is supported or required? */ 511 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 512 return 0; 513 } 514 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 515 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 516 if (rate & IEEE80211_RATE_BASIC) 517 return 0; 518 if (vap->iv_des_nssid != 0 && 519 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 520 return 0; 521 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 522 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 523 return 0; 524 return 1; 525 } 526 527 #ifdef IEEE80211_DEBUG 528 /* 529 * Display node suitability/compatibility. 530 */ 531 static void 532 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 533 { 534 struct ieee80211com *ic = ni->ni_ic; 535 uint8_t rate; 536 int fail; 537 538 fail = 0; 539 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 540 fail |= 0x01; 541 if (vap->iv_opmode == IEEE80211_M_IBSS) { 542 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 543 fail |= 0x02; 544 } else { 545 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 546 fail |= 0x02; 547 } 548 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 549 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 550 fail |= 0x04; 551 } else { 552 /* XXX does this mean privacy is supported or required? */ 553 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 554 fail |= 0x04; 555 } 556 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 557 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 558 if (rate & IEEE80211_RATE_BASIC) 559 fail |= 0x08; 560 if (vap->iv_des_nssid != 0 && 561 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 562 fail |= 0x10; 563 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 564 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 565 fail |= 0x20; 566 567 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 568 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 569 printf(" %3d%c", 570 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 571 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 572 fail & 0x08 ? '!' : ' '); 573 printf(" %4s%c", 574 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 575 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 576 "????", 577 fail & 0x02 ? '!' : ' '); 578 printf(" %3s%c ", 579 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 580 fail & 0x04 ? '!' : ' '); 581 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 582 printf("%s\n", fail & 0x10 ? "!" : ""); 583 } 584 #endif /* IEEE80211_DEBUG */ 585 586 int 587 ieee80211_ibss_merge_check(struct ieee80211_node *ni) 588 { 589 struct ieee80211vap *vap = ni->ni_vap; 590 591 if (ni == vap->iv_bss || 592 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 593 /* unchanged, nothing to do */ 594 return 0; 595 } 596 597 if (!check_bss(vap, ni)) { 598 /* capabilities mismatch */ 599 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 600 "%s: merge failed, capabilities mismatch\n", __func__); 601 #ifdef IEEE80211_DEBUG 602 if (ieee80211_msg_assoc(vap)) 603 check_bss_debug(vap, ni); 604 #endif 605 vap->iv_stats.is_ibss_capmismatch++; 606 return 0; 607 } 608 609 return 1; 610 } 611 612 /* 613 * Check if the given node should populate the node table. 614 * 615 * We need to be in "see all beacons for all ssids" mode in order 616 * to do IBSS merges, however this means we will populate nodes for 617 * /all/ IBSS SSIDs, versus just the one we care about. 618 * 619 * So this check ensures the node can actually belong to our IBSS 620 * configuration. For now it simply checks the SSID. 621 */ 622 int 623 ieee80211_ibss_node_check_new(struct ieee80211_node *ni, 624 const struct ieee80211_scanparams *scan) 625 { 626 struct ieee80211vap *vap = ni->ni_vap; 627 int i; 628 629 /* 630 * If we have no SSID and no scan SSID, return OK. 631 */ 632 if (vap->iv_des_nssid == 0 && scan->ssid == NULL) 633 goto ok; 634 635 /* 636 * If we have one of (SSID, scan SSID) then return error. 637 */ 638 if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) 639 goto mismatch; 640 641 /* 642 * Double-check - we need scan SSID. 643 */ 644 if (scan->ssid == NULL) 645 goto mismatch; 646 647 /* 648 * Check if the scan SSID matches the SSID list for the VAP. 649 */ 650 for (i = 0; i < vap->iv_des_nssid; i++) { 651 /* Sanity length check */ 652 if (vap->iv_des_ssid[i].len != scan->ssid[1]) 653 continue; 654 655 /* Note: SSID in the scan entry is the IE format */ 656 if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, 657 vap->iv_des_ssid[i].len) == 0) 658 goto ok; 659 } 660 661 mismatch: 662 return (0); 663 ok: 664 return (1); 665 } 666 667 /* 668 * Handle 802.11 ad hoc network merge. The 669 * convention, set by the Wireless Ethernet Compatibility Alliance 670 * (WECA), is that an 802.11 station will change its BSSID to match 671 * the "oldest" 802.11 ad hoc network, on the same channel, that 672 * has the station's desired SSID. The "oldest" 802.11 network 673 * sends beacons with the greatest TSF timestamp. 674 * 675 * The caller is assumed to validate TSF's before attempting a merge. 676 * 677 * Return !0 if the BSSID changed, 0 otherwise. 678 */ 679 int 680 ieee80211_ibss_merge(struct ieee80211_node *ni) 681 { 682 #ifdef IEEE80211_DEBUG 683 struct ieee80211vap *vap = ni->ni_vap; 684 #endif 685 686 if (! ieee80211_ibss_merge_check(ni)) 687 return 0; 688 689 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 690 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 691 ether_sprintf(ni->ni_bssid), 692 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 693 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 694 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "" 695 ); 696 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 697 } 698 699 /* 700 * Calculate HT channel promotion flags for all vaps. 701 * This assumes ni_chan have been setup for each vap. 702 */ 703 static int 704 gethtadjustflags(struct ieee80211com *ic) 705 { 706 struct ieee80211vap *vap; 707 int flags; 708 709 flags = 0; 710 /* XXX locking */ 711 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 712 if (vap->iv_state < IEEE80211_S_RUN) 713 continue; 714 switch (vap->iv_opmode) { 715 case IEEE80211_M_WDS: 716 case IEEE80211_M_STA: 717 case IEEE80211_M_AHDEMO: 718 case IEEE80211_M_HOSTAP: 719 case IEEE80211_M_IBSS: 720 case IEEE80211_M_MBSS: 721 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 722 break; 723 default: 724 break; 725 } 726 } 727 return flags; 728 } 729 730 /* 731 * Calculate VHT channel promotion flags for all vaps. 732 * This assumes ni_chan have been setup for each vap. 733 */ 734 static int 735 getvhtadjustflags(struct ieee80211com *ic) 736 { 737 struct ieee80211vap *vap; 738 int flags; 739 740 flags = 0; 741 /* XXX locking */ 742 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 743 if (vap->iv_state < IEEE80211_S_RUN) 744 continue; 745 switch (vap->iv_opmode) { 746 case IEEE80211_M_WDS: 747 case IEEE80211_M_STA: 748 case IEEE80211_M_AHDEMO: 749 case IEEE80211_M_HOSTAP: 750 case IEEE80211_M_IBSS: 751 case IEEE80211_M_MBSS: 752 flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); 753 break; 754 default: 755 break; 756 } 757 } 758 return flags; 759 } 760 761 /* 762 * Check if the current channel needs to change based on whether 763 * any vap's are using HT20/HT40. This is used to sync the state 764 * of ic_curchan after a channel width change on a running vap. 765 * 766 * Same applies for VHT. 767 */ 768 void 769 ieee80211_sync_curchan(struct ieee80211com *ic) 770 { 771 struct ieee80211_channel *c; 772 773 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 774 c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); 775 776 if (c != ic->ic_curchan) { 777 ic->ic_curchan = c; 778 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 779 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 780 IEEE80211_UNLOCK(ic); 781 ic->ic_set_channel(ic); 782 ieee80211_radiotap_chan_change(ic); 783 IEEE80211_LOCK(ic); 784 } 785 } 786 787 /* 788 * Setup the current channel. The request channel may be 789 * promoted if other vap's are operating with HT20/HT40. 790 */ 791 void 792 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 793 { 794 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 795 int flags = gethtadjustflags(ic); 796 /* 797 * Check for channel promotion required to support the 798 * set of running vap's. This assumes we are called 799 * after ni_chan is setup for each vap. 800 */ 801 /* XXX VHT? */ 802 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 803 if (flags > ieee80211_htchanflags(c)) 804 c = ieee80211_ht_adjust_channel(ic, c, flags); 805 } 806 807 /* 808 * VHT promotion - this will at least promote to VHT20/40 809 * based on what HT has done; it may further promote the 810 * channel to VHT80 or above. 811 */ 812 if (ic->ic_vht_cap.vht_cap_info != 0) { 813 int flags = getvhtadjustflags(ic); 814 if (flags > ieee80211_vhtchanflags(c)) 815 c = ieee80211_vht_adjust_channel(ic, c, flags); 816 } 817 818 ic->ic_bsschan = ic->ic_curchan = c; 819 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 820 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 821 } 822 823 /* 824 * Change the current channel. The channel change is guaranteed to have 825 * happened before the next state change. 826 */ 827 void 828 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 829 { 830 ieee80211_setupcurchan(ic, c); 831 ieee80211_runtask(ic, &ic->ic_chan_task); 832 } 833 834 void 835 ieee80211_update_chw(struct ieee80211com *ic) 836 { 837 838 ieee80211_setupcurchan(ic, ic->ic_curchan); 839 ieee80211_runtask(ic, &ic->ic_chw_task); 840 } 841 842 /* 843 * Join the specified IBSS/BSS network. The node is assumed to 844 * be passed in with a held reference. 845 */ 846 static int 847 ieee80211_sta_join1(struct ieee80211_node *selbs) 848 { 849 struct ieee80211vap *vap = selbs->ni_vap; 850 struct ieee80211com *ic = selbs->ni_ic; 851 struct ieee80211_node *obss; 852 int canreassoc; 853 854 /* 855 * Committed to selbs, setup state. 856 */ 857 obss = vap->iv_update_bss(vap, selbs); /* NB: caller assumed to bump refcnt */ 858 /* 859 * Check if old+new node have the same address in which 860 * case we can reassociate when operating in sta mode. 861 */ 862 /* XXX We'll not be in RUN anymore as iv_state got updated already? */ 863 canreassoc = (obss != NULL && 864 vap->iv_state == IEEE80211_S_RUN && 865 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 866 if (obss != NULL) { 867 struct ieee80211_node_table *nt = obss->ni_table; 868 869 copy_bss(selbs, obss); 870 ieee80211_node_decref(obss); /* iv_bss reference */ 871 872 IEEE80211_NODE_LOCK(nt); 873 node_reclaim(nt, obss); /* station table reference */ 874 IEEE80211_NODE_UNLOCK(nt); 875 876 obss = NULL; /* NB: guard against later use */ 877 } 878 879 /* 880 * Delete unusable rates; we've already checked 881 * that the negotiated rate set is acceptable. 882 */ 883 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 884 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 885 886 ieee80211_setcurchan(ic, selbs->ni_chan); 887 /* 888 * Set the erp state (mostly the slot time) to deal with 889 * the auto-select case; this should be redundant if the 890 * mode is locked. 891 */ 892 ieee80211_vap_reset_erp(vap); 893 ieee80211_wme_initparams(vap); 894 895 if (vap->iv_opmode == IEEE80211_M_STA) { 896 if (canreassoc) { 897 /* Reassociate */ 898 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 899 } else { 900 /* 901 * Act as if we received a DEAUTH frame in case we 902 * are invoked from the RUN state. This will cause 903 * us to try to re-authenticate if we are operating 904 * as a station. 905 */ 906 IEEE80211_DPRINTF(vap, IEEE80211_MSG_AUTH, 907 "%s %p<%s> %s -> AUTH, FC0_SUBTYPE_DEAUTH\n", 908 __func__, selbs, ether_sprintf(selbs->ni_macaddr), 909 ieee80211_state_name[vap->iv_state]); 910 ieee80211_new_state(vap, IEEE80211_S_AUTH, 911 IEEE80211_FC0_SUBTYPE_DEAUTH); 912 } 913 } else 914 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 915 return 1; 916 } 917 918 int 919 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 920 const struct ieee80211_scan_entry *se) 921 { 922 struct ieee80211com *ic = vap->iv_ic; 923 struct ieee80211_node *ni; 924 int do_ht = 0; 925 926 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr, 927 __func__, __LINE__); 928 if (ni == NULL) { 929 /* XXX msg */ 930 return 0; 931 } 932 933 /* 934 * Expand scan state into node's format. 935 * XXX may not need all this stuff 936 */ 937 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 938 ni->ni_esslen = se->se_ssid[1]; 939 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 940 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 941 ni->ni_intval = se->se_intval; 942 ni->ni_capinfo = se->se_capinfo; 943 ni->ni_chan = chan; 944 ni->ni_timoff = se->se_timoff; 945 ni->ni_fhdwell = se->se_fhdwell; 946 ni->ni_fhindex = se->se_fhindex; 947 ni->ni_erp = se->se_erp; 948 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 949 ni->ni_noise = se->se_noise; 950 if (vap->iv_opmode == IEEE80211_M_STA) { 951 /* NB: only infrastructure mode requires an associd */ 952 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 953 } 954 955 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 956 ieee80211_ies_expand(&ni->ni_ies); 957 #ifdef IEEE80211_SUPPORT_SUPERG 958 if (ni->ni_ies.ath_ie != NULL) 959 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 960 #endif 961 if (ni->ni_ies.htcap_ie != NULL) 962 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 963 if (ni->ni_ies.htinfo_ie != NULL) 964 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 965 #ifdef IEEE80211_SUPPORT_MESH 966 if (ni->ni_ies.meshid_ie != NULL) 967 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 968 #endif 969 #ifdef IEEE80211_SUPPORT_TDMA 970 if (ni->ni_ies.tdma_ie != NULL) 971 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 972 #endif 973 if (ni->ni_ies.vhtcap_ie != NULL) 974 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 975 if (ni->ni_ies.vhtopmode_ie != NULL) 976 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 977 978 /* XXX parse BSSLOAD IE */ 979 /* XXX parse TXPWRENV IE */ 980 /* XXX parse APCHANREP IE */ 981 } 982 983 vap->iv_dtim_period = se->se_dtimperiod; 984 vap->iv_dtim_count = 0; 985 986 /* NB: must be after ni_chan is setup */ 987 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 988 IEEE80211_F_DOSORT); 989 if (ieee80211_iserp_rateset(&ni->ni_rates)) 990 ni->ni_flags |= IEEE80211_NODE_ERP; 991 992 /* 993 * Setup HT state for this node if it's available, otherwise 994 * non-STA modes won't pick this state up. 995 * 996 * For IBSS and related modes that don't go through an 997 * association request/response, the only appropriate place 998 * to setup the HT state is here. 999 */ 1000 if (ni->ni_ies.htinfo_ie != NULL && 1001 ni->ni_ies.htcap_ie != NULL && 1002 vap->iv_flags_ht & IEEE80211_FHT_HT) { 1003 ieee80211_ht_node_init(ni); 1004 ieee80211_ht_updateparams(ni, 1005 ni->ni_ies.htcap_ie, 1006 ni->ni_ies.htinfo_ie); 1007 do_ht = 1; 1008 } 1009 1010 /* 1011 * Setup VHT state for this node if it's available. 1012 * Same as the above. 1013 * 1014 * For now, don't allow 2GHz VHT operation. 1015 */ 1016 if (ni->ni_ies.vhtopmode_ie != NULL && 1017 ni->ni_ies.vhtcap_ie != NULL && 1018 vap->iv_vht_flags & IEEE80211_FVHT_VHT) { 1019 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1020 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1021 __func__, 1022 ni->ni_macaddr, 1023 ":"); 1024 } else { 1025 ieee80211_vht_node_init(ni); 1026 ieee80211_vht_updateparams(ni, 1027 ni->ni_ies.vhtcap_ie, 1028 ni->ni_ies.vhtopmode_ie); 1029 ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, 1030 ni->ni_ies.vhtopmode_ie); 1031 do_ht = 1; 1032 } 1033 } 1034 1035 /* Finally do the node channel change */ 1036 if (do_ht) { 1037 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1038 ni->ni_ies.htinfo_ie); 1039 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 1040 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1041 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 1042 } 1043 1044 /* XXX else check for ath FF? */ 1045 /* XXX QoS? Difficult given that WME config is specific to a master */ 1046 1047 ieee80211_node_setuptxparms(ni); 1048 ieee80211_ratectl_node_init(ni); 1049 1050 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 1051 } 1052 1053 /* 1054 * Leave the specified IBSS/BSS network. The node is assumed to 1055 * be passed in with a held reference. 1056 */ 1057 void 1058 ieee80211_sta_leave(struct ieee80211_node *ni) 1059 { 1060 struct ieee80211com *ic = ni->ni_ic; 1061 1062 ic->ic_node_cleanup(ni); 1063 ieee80211_notify_node_leave(ni); 1064 } 1065 1066 /* 1067 * Send a deauthenticate frame and drop the station. 1068 */ 1069 void 1070 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 1071 { 1072 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 1073 ieee80211_ref_node(ni); 1074 if (ni->ni_associd != 0) 1075 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 1076 ieee80211_node_leave(ni); 1077 ieee80211_free_node(ni); 1078 } 1079 1080 static struct ieee80211_node * 1081 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1082 { 1083 struct ieee80211_node *ni; 1084 1085 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 1086 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1087 return ni; 1088 } 1089 1090 static int 1091 node_init(struct ieee80211_node *ni) 1092 { 1093 return 0; 1094 } 1095 1096 /* 1097 * Initialize an ie blob with the specified data. If previous 1098 * data exists re-use the data block. As a side effect we clear 1099 * all references to specific ie's; the caller is required to 1100 * recalculate them. 1101 */ 1102 int 1103 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 1104 { 1105 /* NB: assumes data+len are the last fields */ 1106 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 1107 if (ies->data != NULL && ies->len != len) { 1108 /* data size changed */ 1109 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1110 ies->data = NULL; 1111 } 1112 if (ies->data == NULL) { 1113 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 1114 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1115 if (ies->data == NULL) { 1116 ies->len = 0; 1117 /* NB: pointers have already been zero'd above */ 1118 return 0; 1119 } 1120 } 1121 memcpy(ies->data, data, len); 1122 ies->len = len; 1123 return 1; 1124 } 1125 1126 /* 1127 * Reclaim storage for an ie blob. 1128 */ 1129 void 1130 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 1131 { 1132 if (ies->data != NULL) 1133 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 1134 } 1135 1136 /* 1137 * Expand an ie blob data contents and to fillin individual 1138 * ie pointers. The data blob is assumed to be well-formed; 1139 * we don't do any validity checking of ie lengths. 1140 */ 1141 void 1142 ieee80211_ies_expand(struct ieee80211_ies *ies) 1143 { 1144 uint8_t *ie; 1145 int ielen; 1146 1147 ie = ies->data; 1148 ielen = ies->len; 1149 while (ielen > 1) { 1150 /* Make sure the given IE length fits into the total length. */ 1151 if ((2 + ie[1]) > ielen) { 1152 printf("%s: malformed IEs! ies %p { data %p len %d }: " 1153 "ie %u len 2+%u > total len left %d\n", 1154 __func__, ies, ies->data, ies->len, 1155 ie[0], ie[1], ielen); 1156 return; 1157 } 1158 switch (ie[0]) { 1159 case IEEE80211_ELEMID_VENDOR: 1160 if (iswpaoui(ie)) 1161 ies->wpa_ie = ie; 1162 else if (iswmeoui(ie)) 1163 ies->wme_ie = ie; 1164 #ifdef IEEE80211_SUPPORT_SUPERG 1165 else if (isatherosoui(ie)) 1166 ies->ath_ie = ie; 1167 #endif 1168 #ifdef IEEE80211_SUPPORT_TDMA 1169 else if (istdmaoui(ie)) 1170 ies->tdma_ie = ie; 1171 #endif 1172 break; 1173 case IEEE80211_ELEMID_RSN: 1174 ies->rsn_ie = ie; 1175 break; 1176 case IEEE80211_ELEMID_HTCAP: 1177 ies->htcap_ie = ie; 1178 break; 1179 case IEEE80211_ELEMID_HTINFO: 1180 ies->htinfo_ie = ie; 1181 break; 1182 #ifdef IEEE80211_SUPPORT_MESH 1183 case IEEE80211_ELEMID_MESHID: 1184 ies->meshid_ie = ie; 1185 break; 1186 #endif 1187 case IEEE80211_ELEMID_VHT_CAP: 1188 ies->vhtcap_ie = ie; 1189 break; 1190 case IEEE80211_ELEMID_VHT_OPMODE: 1191 ies->vhtopmode_ie = ie; 1192 break; 1193 case IEEE80211_ELEMID_VHT_PWR_ENV: 1194 ies->vhtpwrenv_ie = ie; 1195 break; 1196 case IEEE80211_ELEMID_BSSLOAD: 1197 ies->bssload_ie = ie; 1198 break; 1199 case IEEE80211_ELEMID_APCHANREP: 1200 ies->apchanrep_ie = ie; 1201 break; 1202 } 1203 ielen -= 2 + ie[1]; 1204 ie += 2 + ie[1]; 1205 } 1206 } 1207 1208 /* 1209 * Reclaim any resources in a node and reset any critical 1210 * state. Typically nodes are free'd immediately after, 1211 * but in some cases the storage may be reused so we need 1212 * to insure consistent state (should probably fix that). 1213 */ 1214 static void 1215 node_cleanup(struct ieee80211_node *ni) 1216 { 1217 struct ieee80211vap *vap = ni->ni_vap; 1218 struct ieee80211com *ic = ni->ni_ic; 1219 int i; 1220 1221 /* NB: preserve ni_table */ 1222 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1223 if (vap->iv_opmode != IEEE80211_M_STA) 1224 vap->iv_ps_sta--; 1225 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1226 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1227 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1228 } 1229 /* 1230 * Cleanup any VHT and HT-related state. 1231 */ 1232 if (ni->ni_flags & IEEE80211_NODE_VHT) 1233 ieee80211_vht_node_cleanup(ni); 1234 if (ni->ni_flags & IEEE80211_NODE_HT) 1235 ieee80211_ht_node_cleanup(ni); 1236 #ifdef IEEE80211_SUPPORT_SUPERG 1237 /* Always do FF node cleanup; for A-MSDU */ 1238 ieee80211_ff_node_cleanup(ni); 1239 #endif 1240 #ifdef IEEE80211_SUPPORT_MESH 1241 /* 1242 * Cleanup any mesh-related state. 1243 */ 1244 if (vap->iv_opmode == IEEE80211_M_MBSS) 1245 ieee80211_mesh_node_cleanup(ni); 1246 #endif 1247 /* 1248 * Clear any staging queue entries. 1249 */ 1250 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1251 1252 /* 1253 * Clear AREF flag that marks the authorization refcnt bump 1254 * has happened. This is probably not needed as the node 1255 * should always be removed from the table so not found but 1256 * do it just in case. 1257 * Likewise clear the ASSOCID flag as these flags are intended 1258 * to be managed in tandem. 1259 */ 1260 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1261 1262 /* 1263 * Drain power save queue and, if needed, clear TIM. 1264 */ 1265 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1266 vap->iv_set_tim(ni, 0); 1267 1268 ni->ni_associd = 0; 1269 if (ni->ni_challenge != NULL) { 1270 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1271 ni->ni_challenge = NULL; 1272 } 1273 /* 1274 * Preserve SSID, WPA, and WME ie's so the bss node is 1275 * reusable during a re-auth/re-assoc state transition. 1276 * If we remove these data they will not be recreated 1277 * because they come from a probe-response or beacon frame 1278 * which cannot be expected prior to the association-response. 1279 * This should not be an issue when operating in other modes 1280 * as stations leaving always go through a full state transition 1281 * which will rebuild this state. 1282 * 1283 * XXX does this leave us open to inheriting old state? 1284 */ 1285 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1286 if (ni->ni_rxfrag[i] != NULL) { 1287 m_freem(ni->ni_rxfrag[i]); 1288 ni->ni_rxfrag[i] = NULL; 1289 } 1290 /* 1291 * Must be careful here to remove any key map entry w/o a LOR. 1292 */ 1293 ieee80211_node_delucastkey(ni); 1294 } 1295 1296 static void 1297 node_free(struct ieee80211_node *ni) 1298 { 1299 struct ieee80211com *ic = ni->ni_ic; 1300 1301 ieee80211_ratectl_node_deinit(ni); 1302 ic->ic_node_cleanup(ni); 1303 ieee80211_ies_cleanup(&ni->ni_ies); 1304 ieee80211_psq_cleanup(&ni->ni_psq); 1305 IEEE80211_FREE(ni, M_80211_NODE); 1306 } 1307 1308 static void 1309 node_age(struct ieee80211_node *ni) 1310 { 1311 struct ieee80211vap *vap = ni->ni_vap; 1312 1313 /* 1314 * Age frames on the power save queue. 1315 */ 1316 if (ieee80211_node_psq_age(ni) != 0 && 1317 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1318 vap->iv_set_tim(ni, 0); 1319 /* 1320 * Age out HT resources (e.g. frames on the 1321 * A-MPDU reorder queues). 1322 */ 1323 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1324 ieee80211_ht_node_age(ni); 1325 } 1326 1327 static int8_t 1328 node_getrssi(const struct ieee80211_node *ni) 1329 { 1330 uint32_t avgrssi = ni->ni_avgrssi; 1331 int32_t rssi; 1332 1333 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1334 return 0; 1335 rssi = IEEE80211_RSSI_GET(avgrssi); 1336 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1337 } 1338 1339 static void 1340 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1341 { 1342 *rssi = node_getrssi(ni); 1343 *noise = ni->ni_noise; 1344 } 1345 1346 static void 1347 node_getmimoinfo(const struct ieee80211_node *ni, 1348 struct ieee80211_mimo_info *info) 1349 { 1350 int i; 1351 uint32_t avgrssi; 1352 int32_t rssi; 1353 1354 bzero(info, sizeof(*info)); 1355 1356 for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { 1357 /* Note: for now, just pri20 channel info */ 1358 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1359 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1360 info->ch[i].rssi[0] = 0; 1361 } else { 1362 rssi = IEEE80211_RSSI_GET(avgrssi); 1363 info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1364 } 1365 info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; 1366 } 1367 1368 /* XXX ext radios? */ 1369 1370 /* XXX EVM? */ 1371 } 1372 1373 static void 1374 ieee80211_add_node_nt(struct ieee80211_node_table *nt, 1375 struct ieee80211_node *ni) 1376 { 1377 struct ieee80211com *ic = nt->nt_ic; 1378 int hash; 1379 1380 IEEE80211_NODE_LOCK_ASSERT(nt); 1381 1382 hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); 1383 (void) ic; /* XXX IEEE80211_NODE_HASH */ 1384 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1385 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1386 nt->nt_count++; 1387 ni->ni_table = nt; 1388 } 1389 1390 static void 1391 ieee80211_del_node_nt(struct ieee80211_node_table *nt, 1392 struct ieee80211_node *ni) 1393 { 1394 1395 IEEE80211_NODE_LOCK_ASSERT(nt); 1396 1397 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1398 LIST_REMOVE(ni, ni_hash); 1399 nt->nt_count--; 1400 KASSERT(nt->nt_count >= 0, 1401 ("nt_count is negative (%d)!\n", nt->nt_count)); 1402 ni->ni_table = NULL; 1403 } 1404 1405 static struct ieee80211_node * 1406 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1407 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], 1408 const char *func __debrefcnt_used, int line __debrefcnt_used) 1409 { 1410 struct ieee80211com *ic = nt->nt_ic; 1411 struct ieee80211_node *ni; 1412 1413 ni = ic->ic_node_alloc(vap, macaddr); 1414 if (ni == NULL) { 1415 vap->iv_stats.is_rx_nodealloc++; 1416 return NULL; 1417 } 1418 1419 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1420 "%s %p<%s> in %s table\n", __func__, ni, 1421 ether_sprintf(macaddr), nt->nt_name); 1422 1423 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1424 ieee80211_node_initref(ni); /* mark referenced */ 1425 #ifdef IEEE80211_DEBUG_REFCNT 1426 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1427 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1428 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1429 #endif 1430 ni->ni_chan = IEEE80211_CHAN_ANYC; 1431 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1432 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1433 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1434 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1435 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1436 ni->ni_inact_reload = nt->nt_inact_init; 1437 ni->ni_inact = ni->ni_inact_reload; 1438 ni->ni_ath_defkeyix = 0x7fff; 1439 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1440 #ifdef IEEE80211_SUPPORT_MESH 1441 if (vap->iv_opmode == IEEE80211_M_MBSS) 1442 ieee80211_mesh_node_init(vap, ni); 1443 #endif 1444 IEEE80211_NODE_LOCK(nt); 1445 ieee80211_add_node_nt(nt, ni); 1446 ni->ni_vap = vap; 1447 ni->ni_ic = ic; 1448 IEEE80211_NODE_UNLOCK(nt); 1449 1450 /* handle failure; free node state */ 1451 if (ic->ic_node_init(ni) != 0) { 1452 vap->iv_stats.is_rx_nodealloc++; 1453 ieee80211_psq_cleanup(&ni->ni_psq); 1454 ieee80211_ratectl_node_deinit(ni); 1455 __ieee80211_free_node(ni); 1456 return NULL; 1457 } 1458 1459 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1460 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1461 1462 return ni; 1463 } 1464 1465 /* 1466 * Craft a temporary node suitable for sending a management frame 1467 * to the specified station. We craft only as much state as we 1468 * need to do the work since the node will be immediately reclaimed 1469 * once the send completes. 1470 */ 1471 struct ieee80211_node * 1472 ieee80211_tmp_node(struct ieee80211vap *vap, 1473 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1474 { 1475 struct ieee80211com *ic = vap->iv_ic; 1476 struct ieee80211_node *ni; 1477 1478 ni = ic->ic_node_alloc(vap, macaddr); 1479 if (ni != NULL) { 1480 struct ieee80211_node *bss = vap->iv_bss; 1481 1482 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1483 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1484 1485 ni->ni_table = NULL; /* NB: pedantic */ 1486 ni->ni_ic = ic; /* NB: needed to set channel */ 1487 ni->ni_vap = vap; 1488 1489 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1490 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1491 ieee80211_node_initref(ni); /* mark referenced */ 1492 #ifdef IEEE80211_DEBUG_REFCNT 1493 /* Only one caller so we skip func/line passing into the func. */ 1494 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1495 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, "", -1, ni, 1496 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1497 #endif 1498 /* NB: required by ieee80211_fix_rate */ 1499 ieee80211_node_set_chan(ni, bss->ni_chan); 1500 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1501 IEEE80211_KEYIX_NONE); 1502 ni->ni_txpower = bss->ni_txpower; 1503 /* XXX optimize away */ 1504 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1505 1506 ieee80211_ratectl_node_init(ni); 1507 1508 /* handle failure; free node state */ 1509 if (ic->ic_node_init(ni) != 0) { 1510 vap->iv_stats.is_rx_nodealloc++; 1511 ieee80211_psq_cleanup(&ni->ni_psq); 1512 ieee80211_ratectl_node_deinit(ni); 1513 __ieee80211_free_node(ni); 1514 return NULL; 1515 } 1516 1517 } else { 1518 /* XXX msg */ 1519 vap->iv_stats.is_rx_nodealloc++; 1520 } 1521 return ni; 1522 } 1523 1524 struct ieee80211_node * 1525 ieee80211_dup_bss(struct ieee80211vap *vap, 1526 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1527 { 1528 struct ieee80211com *ic = vap->iv_ic; 1529 struct ieee80211_node *ni; 1530 1531 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr, __func__, __LINE__); 1532 if (ni != NULL) { 1533 struct ieee80211_node *bss = vap->iv_bss; 1534 /* 1535 * Inherit from iv_bss. 1536 */ 1537 copy_bss(ni, bss); 1538 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1539 ieee80211_node_set_chan(ni, bss->ni_chan); 1540 } 1541 return ni; 1542 } 1543 1544 /* 1545 * Create a bss node for a legacy WDS vap. The far end does 1546 * not associate so we just create create a new node and 1547 * simulate an association. The caller is responsible for 1548 * installing the node as the bss node and handling any further 1549 * setup work like authorizing the port. 1550 */ 1551 struct ieee80211_node * 1552 ieee80211_node_create_wds(struct ieee80211vap *vap, 1553 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1554 { 1555 struct ieee80211com *ic = vap->iv_ic; 1556 struct ieee80211_node *ni; 1557 1558 /* XXX check if node already in sta table? */ 1559 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid, __func__, __LINE__); 1560 if (ni != NULL) { 1561 ni->ni_wdsvap = vap; 1562 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1563 /* 1564 * Inherit any manually configured settings. 1565 */ 1566 copy_bss(ni, vap->iv_bss); 1567 ieee80211_node_set_chan(ni, chan); 1568 /* NB: propagate ssid so available to WPA supplicant */ 1569 ni->ni_esslen = vap->iv_des_ssid[0].len; 1570 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1571 /* NB: no associd for peer */ 1572 /* 1573 * There are no management frames to use to 1574 * discover neighbor capabilities, so blindly 1575 * propagate the local configuration. 1576 */ 1577 if (vap->iv_flags & IEEE80211_F_WME) 1578 ni->ni_flags |= IEEE80211_NODE_QOS; 1579 #ifdef IEEE80211_SUPPORT_SUPERG 1580 if (vap->iv_flags & IEEE80211_F_FF) 1581 ni->ni_flags |= IEEE80211_NODE_FF; 1582 #endif 1583 /* XXX VHT */ 1584 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1585 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1586 /* 1587 * Device is HT-capable and HT is enabled for 1588 * the vap; setup HT operation. On return 1589 * ni_chan will be adjusted to an HT channel. 1590 */ 1591 ieee80211_ht_wds_init(ni); 1592 if (vap->iv_vht_flags & IEEE80211_FVHT_VHT) { 1593 printf("%s: TODO: vht_wds_init\n", __func__); 1594 } 1595 } else { 1596 struct ieee80211_channel *c = ni->ni_chan; 1597 /* 1598 * Force a legacy channel to be used. 1599 */ 1600 c = ieee80211_find_channel(ic, 1601 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1602 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1603 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1604 ni->ni_chan = c; 1605 } 1606 } 1607 return ni; 1608 } 1609 1610 struct ieee80211_node * 1611 _ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1612 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1613 const char *func __debrefcnt_used, int line __debrefcnt_used) 1614 { 1615 struct ieee80211_node *ni; 1616 int hash; 1617 1618 IEEE80211_NODE_LOCK_ASSERT(nt); 1619 1620 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1621 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1622 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1623 ieee80211_ref_node(ni); /* mark referenced */ 1624 #ifdef IEEE80211_DEBUG_REFCNT 1625 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1626 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1627 func, line, 1628 ni, ether_sprintf(ni->ni_macaddr), 1629 ieee80211_node_refcnt(ni)); 1630 #endif 1631 return ni; 1632 } 1633 } 1634 return NULL; 1635 } 1636 1637 struct ieee80211_node * 1638 _ieee80211_find_node(struct ieee80211_node_table *nt, 1639 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1640 const char *func __debrefcnt_used, int line __debrefcnt_used) 1641 { 1642 struct ieee80211_node *ni; 1643 1644 IEEE80211_NODE_LOCK(nt); 1645 ni = _ieee80211_find_node_locked(nt, macaddr, func, line); 1646 IEEE80211_NODE_UNLOCK(nt); 1647 return ni; 1648 } 1649 1650 struct ieee80211_node * 1651 _ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1652 const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], 1653 const char *func __debrefcnt_used, int line __debrefcnt_used) 1654 { 1655 struct ieee80211_node *ni; 1656 int hash; 1657 1658 IEEE80211_NODE_LOCK_ASSERT(nt); 1659 1660 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1661 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1662 if (ni->ni_vap == vap && 1663 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1664 ieee80211_ref_node(ni); /* mark referenced */ 1665 #ifdef IEEE80211_DEBUG_REFCNT 1666 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1667 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1668 func, line, 1669 ni, ether_sprintf(ni->ni_macaddr), 1670 ieee80211_node_refcnt(ni)); 1671 #endif 1672 return ni; 1673 } 1674 } 1675 return NULL; 1676 } 1677 1678 struct ieee80211_node * 1679 _ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1680 const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], 1681 const char *func __debrefcnt_used, int line __debrefcnt_used) 1682 { 1683 struct ieee80211_node *ni; 1684 1685 IEEE80211_NODE_LOCK(nt); 1686 ni = _ieee80211_find_vap_node_locked(nt, vap, macaddr, func, line); 1687 IEEE80211_NODE_UNLOCK(nt); 1688 return ni; 1689 } 1690 1691 /* 1692 * Fake up a node; this handles node discovery in adhoc mode. 1693 * Note that for the driver's benefit we treat this like 1694 * an association so the driver has an opportunity to setup 1695 * it's private state. 1696 */ 1697 struct ieee80211_node * 1698 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1699 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1700 { 1701 struct ieee80211_node *ni; 1702 1703 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1704 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1705 ni = ieee80211_dup_bss(vap, macaddr); 1706 if (ni != NULL) { 1707 struct ieee80211com *ic = vap->iv_ic; 1708 1709 /* XXX no rate negotiation; just dup */ 1710 ni->ni_rates = vap->iv_bss->ni_rates; 1711 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1712 ni->ni_flags |= IEEE80211_NODE_ERP; 1713 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1714 /* 1715 * In adhoc demo mode there are no management 1716 * frames to use to discover neighbor capabilities, 1717 * so blindly propagate the local configuration 1718 * so we can do interesting things (e.g. use 1719 * WME to disable ACK's). 1720 */ 1721 /* 1722 * XXX TODO: 11n? 1723 */ 1724 if (vap->iv_flags & IEEE80211_F_WME) 1725 ni->ni_flags |= IEEE80211_NODE_QOS; 1726 #ifdef IEEE80211_SUPPORT_SUPERG 1727 if (vap->iv_flags & IEEE80211_F_FF) 1728 ni->ni_flags |= IEEE80211_NODE_FF; 1729 #endif 1730 } 1731 ieee80211_node_setuptxparms(ni); 1732 ieee80211_ratectl_node_init(ni); 1733 1734 /* 1735 * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, 1736 * not A-MPDU TX; not 11n rates, etc. We'll cycle 1737 * that after we hear that we can indeed do 11n 1738 * (either by a beacon frame or by a probe response.) 1739 */ 1740 1741 /* 1742 * This is the first time we see the node. 1743 */ 1744 if (ic->ic_newassoc != NULL) 1745 ic->ic_newassoc(ni, 1); 1746 1747 /* 1748 * Kick off a probe request to the given node; 1749 * we will then use the probe response to update 1750 * 11n/etc configuration state. 1751 * 1752 * XXX TODO: this isn't guaranteed, and until we get 1753 * a probe response, we won't be able to actually 1754 * do anything 802.11n related to the node. 1755 * So if this does indeed work, maybe we should hold 1756 * off on sending responses until we get the probe 1757 * response, or just default to some sensible subset 1758 * of 802.11n behaviour (eg always allow aggregation 1759 * negotiation TO us, but not FROM us, etc) so we 1760 * aren't entirely busted. 1761 */ 1762 if (vap->iv_opmode == IEEE80211_M_IBSS) { 1763 ieee80211_send_probereq(ni, /* node */ 1764 vap->iv_myaddr, /* SA */ 1765 ni->ni_macaddr, /* DA */ 1766 vap->iv_bss->ni_bssid, /* BSSID */ 1767 vap->iv_bss->ni_essid, 1768 vap->iv_bss->ni_esslen); /* SSID */ 1769 } 1770 1771 /* XXX not right for 802.1x/WPA */ 1772 ieee80211_node_authorize(ni); 1773 } 1774 return ni; 1775 } 1776 1777 void 1778 ieee80211_init_neighbor(struct ieee80211_node *ni, 1779 const struct ieee80211_frame *wh, 1780 const struct ieee80211_scanparams *sp) 1781 { 1782 int do_ht_setup = 0, do_vht_setup = 0; 1783 1784 ni->ni_esslen = sp->ssid[1]; 1785 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1786 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1787 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1788 ni->ni_intval = sp->bintval; 1789 ni->ni_capinfo = sp->capinfo; 1790 ni->ni_chan = ni->ni_ic->ic_curchan; 1791 ni->ni_fhdwell = sp->fhdwell; 1792 ni->ni_fhindex = sp->fhindex; 1793 ni->ni_erp = sp->erp; 1794 ni->ni_timoff = sp->timoff; 1795 #ifdef IEEE80211_SUPPORT_MESH 1796 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1797 ieee80211_mesh_init_neighbor(ni, wh, sp); 1798 #endif 1799 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1800 ieee80211_ies_expand(&ni->ni_ies); 1801 if (ni->ni_ies.wme_ie != NULL) 1802 ni->ni_flags |= IEEE80211_NODE_QOS; 1803 else 1804 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1805 #ifdef IEEE80211_SUPPORT_SUPERG 1806 if (ni->ni_ies.ath_ie != NULL) 1807 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1808 #endif 1809 if (ni->ni_ies.htcap_ie != NULL) 1810 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1811 if (ni->ni_ies.htinfo_ie != NULL) 1812 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1813 1814 if (ni->ni_ies.vhtcap_ie != NULL) 1815 ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); 1816 if (ni->ni_ies.vhtopmode_ie != NULL) 1817 ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); 1818 1819 if ((ni->ni_ies.htcap_ie != NULL) && 1820 (ni->ni_ies.htinfo_ie != NULL) && 1821 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1822 do_ht_setup = 1; 1823 } 1824 1825 if ((ni->ni_ies.vhtcap_ie != NULL) && 1826 (ni->ni_ies.vhtopmode_ie != NULL) && 1827 (ni->ni_vap->iv_vht_flags & IEEE80211_FVHT_VHT)) { 1828 do_vht_setup = 1; 1829 } 1830 } 1831 1832 /* NB: must be after ni_chan is setup */ 1833 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1834 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1835 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1836 1837 /* 1838 * If the neighbor is HT compatible, flip that on. 1839 */ 1840 if (do_ht_setup) { 1841 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1842 "%s: doing HT setup\n", __func__); 1843 ieee80211_ht_node_init(ni); 1844 ieee80211_ht_updateparams(ni, 1845 ni->ni_ies.htcap_ie, 1846 ni->ni_ies.htinfo_ie); 1847 1848 if (do_vht_setup) { 1849 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1850 printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", 1851 __func__, 1852 ni->ni_macaddr, 1853 ":"); 1854 } else { 1855 ieee80211_vht_node_init(ni); 1856 ieee80211_vht_updateparams(ni, 1857 ni->ni_ies.vhtcap_ie, 1858 ni->ni_ies.vhtopmode_ie); 1859 ieee80211_setup_vht_rates(ni, 1860 ni->ni_ies.vhtcap_ie, 1861 ni->ni_ies.vhtopmode_ie); 1862 } 1863 } 1864 1865 /* 1866 * Finally do the channel upgrade/change based 1867 * on the HT/VHT configuration. 1868 */ 1869 ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, 1870 ni->ni_ies.htinfo_ie); 1871 ieee80211_setup_htrates(ni, 1872 ni->ni_ies.htcap_ie, 1873 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1874 ieee80211_setup_basic_htrates(ni, 1875 ni->ni_ies.htinfo_ie); 1876 1877 ieee80211_node_setuptxparms(ni); 1878 ieee80211_ratectl_node_init(ni); 1879 1880 /* Reassociate; we're now 11n/11ac */ 1881 /* 1882 * XXX TODO: this is the wrong thing to do - 1883 * we're calling it with isnew=1 so the ath(4) 1884 * driver reinitialises the rate tables. 1885 * This "mostly" works for ath(4), but it won't 1886 * be right for firmware devices which allocate 1887 * node states. 1888 * 1889 * So, do we just create a new node and delete 1890 * the old one? Or? 1891 */ 1892 if (ni->ni_ic->ic_newassoc) 1893 ni->ni_ic->ic_newassoc(ni, 1); 1894 } 1895 } 1896 1897 /* 1898 * Do node discovery in adhoc mode on receipt of a beacon 1899 * or probe response frame. Note that for the driver's 1900 * benefit we treat this like an association so the 1901 * driver has an opportunity to setup it's private state. 1902 */ 1903 struct ieee80211_node * 1904 ieee80211_add_neighbor(struct ieee80211vap *vap, 1905 const struct ieee80211_frame *wh, 1906 const struct ieee80211_scanparams *sp) 1907 { 1908 struct ieee80211_node *ni; 1909 1910 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1911 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1912 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1913 if (ni != NULL) { 1914 struct ieee80211com *ic = vap->iv_ic; 1915 1916 ieee80211_init_neighbor(ni, wh, sp); 1917 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1918 ni->ni_flags |= IEEE80211_NODE_ERP; 1919 ieee80211_node_setuptxparms(ni); 1920 ieee80211_ratectl_node_init(ni); 1921 if (ic->ic_newassoc != NULL) 1922 ic->ic_newassoc(ni, 1); 1923 /* XXX not right for 802.1x/WPA */ 1924 ieee80211_node_authorize(ni); 1925 } 1926 return ni; 1927 } 1928 1929 #define IS_PROBEREQ(wh) \ 1930 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1931 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1932 #define IS_BCAST_PROBEREQ(wh) \ 1933 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1934 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1935 1936 static __inline struct ieee80211_node * 1937 _find_rxnode(struct ieee80211_node_table *nt, 1938 const struct ieee80211_frame_min *wh, 1939 const char *func __debrefcnt_used, int line __debrefcnt_used) 1940 { 1941 if (IS_BCAST_PROBEREQ(wh)) 1942 return NULL; /* spam bcast probe req to all vap's */ 1943 return _ieee80211_find_node_locked(nt, wh->i_addr2, func, line); 1944 } 1945 1946 /* 1947 * Locate the node for sender, track state, and then pass the 1948 * (referenced) node up to the 802.11 layer for its use. Note 1949 * we can return NULL if the sender is not in the table. 1950 */ 1951 struct ieee80211_node * 1952 _ieee80211_find_rxnode(struct ieee80211com *ic, 1953 const struct ieee80211_frame_min *wh, 1954 const char *func __debrefcnt_used, int line __debrefcnt_used) 1955 { 1956 struct ieee80211_node_table *nt; 1957 struct ieee80211_node *ni; 1958 1959 nt = &ic->ic_sta; 1960 IEEE80211_NODE_LOCK(nt); 1961 ni = _find_rxnode(nt, wh, func, line); 1962 IEEE80211_NODE_UNLOCK(nt); 1963 1964 return ni; 1965 } 1966 1967 /* 1968 * Like ieee80211_find_rxnode but use the supplied h/w 1969 * key index as a hint to locate the node in the key 1970 * mapping table. If an entry is present at the key 1971 * index we return it; otherwise do a normal lookup and 1972 * update the mapping table if the station has a unicast 1973 * key assigned to it. 1974 */ 1975 struct ieee80211_node * 1976 _ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1977 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1978 const char *func __debrefcnt_used, int line __debrefcnt_used) 1979 { 1980 struct ieee80211_node_table *nt; 1981 struct ieee80211_node *ni; 1982 1983 nt = &ic->ic_sta; 1984 IEEE80211_NODE_LOCK(nt); 1985 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1986 ni = nt->nt_keyixmap[keyix]; 1987 else 1988 ni = NULL; 1989 if (ni == NULL) { 1990 ni = _find_rxnode(nt, wh, func, line); 1991 if (ni != NULL && nt->nt_keyixmap != NULL) { 1992 /* 1993 * If the station has a unicast key cache slot 1994 * assigned update the key->node mapping table. 1995 */ 1996 keyix = ni->ni_ucastkey.wk_rxkeyix; 1997 /* XXX can keyixmap[keyix] != NULL? */ 1998 if (keyix < nt->nt_keyixmax && 1999 nt->nt_keyixmap[keyix] == NULL) { 2000 IEEE80211_DPRINTF(ni->ni_vap, 2001 IEEE80211_MSG_NODE, 2002 "%s: add key map entry %p<%s> refcnt %d\n", 2003 __func__, ni, ether_sprintf(ni->ni_macaddr), 2004 ieee80211_node_refcnt(ni)+1); 2005 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 2006 } 2007 } 2008 } else { 2009 if (IS_BCAST_PROBEREQ(wh)) 2010 ni = NULL; /* spam bcast probe req to all vap's */ 2011 else 2012 ieee80211_ref_node(ni); 2013 } 2014 IEEE80211_NODE_UNLOCK(nt); 2015 2016 return ni; 2017 } 2018 #undef IS_BCAST_PROBEREQ 2019 #undef IS_PROBEREQ 2020 2021 /* 2022 * Return a reference to the appropriate node for sending 2023 * a data frame. This handles node discovery in adhoc networks. 2024 */ 2025 struct ieee80211_node * 2026 _ieee80211_find_txnode(struct ieee80211vap *vap, 2027 const uint8_t macaddr[IEEE80211_ADDR_LEN], 2028 const char *func __debrefcnt_used, int line __debrefcnt_used) 2029 { 2030 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 2031 struct ieee80211_node *ni; 2032 2033 /* 2034 * The destination address should be in the node table 2035 * unless this is a multicast/broadcast frame. We can 2036 * also optimize station mode operation, all frames go 2037 * to the bss node. 2038 */ 2039 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 2040 IEEE80211_NODE_LOCK(nt); 2041 if (vap->iv_opmode == IEEE80211_M_STA || 2042 vap->iv_opmode == IEEE80211_M_WDS || 2043 IEEE80211_IS_MULTICAST(macaddr)) 2044 ni = ieee80211_ref_node(vap->iv_bss); 2045 else 2046 ni = _ieee80211_find_node_locked(nt, macaddr, func, line); 2047 IEEE80211_NODE_UNLOCK(nt); 2048 2049 if (ni == NULL) { 2050 if (vap->iv_opmode == IEEE80211_M_IBSS || 2051 vap->iv_opmode == IEEE80211_M_AHDEMO) { 2052 /* 2053 * In adhoc mode cons up a node for the destination. 2054 * Note that we need an additional reference for the 2055 * caller to be consistent with 2056 * ieee80211_find_node_locked. 2057 */ 2058 /* 2059 * XXX TODO: this doesn't fake up 11n state; we need 2060 * to find another way to get it upgraded. 2061 */ 2062 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 2063 if (ni != NULL) 2064 (void) ieee80211_ref_node(ni); 2065 } else { 2066 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 2067 "no node, discard frame (%s)", __func__); 2068 vap->iv_stats.is_tx_nonode++; 2069 } 2070 } 2071 return ni; 2072 } 2073 2074 struct ieee80211_node * 2075 _ieee80211_ref_node(struct ieee80211_node *ni, 2076 const char *func __debrefcnt_used, int line __debrefcnt_used) 2077 { 2078 2079 #ifdef IEEE80211_DEBUG_REFCNT 2080 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2081 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2082 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2083 #endif 2084 ieee80211_node_incref(ni); 2085 return (ni); 2086 } 2087 2088 static void 2089 __ieee80211_free_node(struct ieee80211_node *ni) 2090 { 2091 struct ieee80211_node_table *nt = ni->ni_table; 2092 2093 /* 2094 * NB: careful about referencing the vap as it may be 2095 * gone if the last reference was held by a driver. 2096 * We know the com will always be present so it's safe 2097 * to use ni_ic below to reclaim resources. 2098 */ 2099 #if 0 2100 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2101 "%s %p<%s> in %s table\n", __func__, ni, 2102 ether_sprintf(ni->ni_macaddr), 2103 nt != NULL ? nt->nt_name : "<gone>"); 2104 #endif 2105 if (ni->ni_associd != 0) { 2106 struct ieee80211vap *vap = ni->ni_vap; 2107 if (vap->iv_aid_bitmap != NULL) 2108 IEEE80211_AID_CLR(vap, ni->ni_associd); 2109 } 2110 if (nt != NULL) 2111 ieee80211_del_node_nt(nt, ni); 2112 ni->ni_ic->ic_node_free(ni); 2113 } 2114 2115 /* 2116 * Clear any entry in the unicast key mapping table. 2117 */ 2118 static int 2119 node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2120 { 2121 ieee80211_keyix keyix; 2122 2123 keyix = ni->ni_ucastkey.wk_rxkeyix; 2124 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 2125 nt->nt_keyixmap[keyix] == ni) { 2126 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2127 "%s: %p<%s> clear key map entry %u\n", 2128 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 2129 nt->nt_keyixmap[keyix] = NULL; 2130 ieee80211_node_decref(ni); 2131 return 1; 2132 } 2133 2134 return 0; 2135 } 2136 2137 void 2138 _ieee80211_free_node(struct ieee80211_node *ni, 2139 const char *func __debrefcnt_used, int line __debrefcnt_used) 2140 { 2141 struct ieee80211_node_table *nt = ni->ni_table; 2142 2143 #ifdef IEEE80211_DEBUG_REFCNT 2144 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2145 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 2146 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 2147 #endif 2148 if (nt != NULL) { 2149 IEEE80211_NODE_LOCK(nt); 2150 if (ieee80211_node_dectestref(ni)) { 2151 /* 2152 * Last reference, reclaim state. 2153 */ 2154 __ieee80211_free_node(ni); 2155 } else if (ieee80211_node_refcnt(ni) == 1) 2156 if (node_clear_keyixmap(nt, ni)) 2157 __ieee80211_free_node(ni); 2158 IEEE80211_NODE_UNLOCK(nt); 2159 } else { 2160 if (ieee80211_node_dectestref(ni)) 2161 __ieee80211_free_node(ni); 2162 } 2163 } 2164 2165 /* 2166 * Reclaim a unicast key and clear any key cache state. 2167 */ 2168 int 2169 ieee80211_node_delucastkey(struct ieee80211_node *ni) 2170 { 2171 struct ieee80211com *ic = ni->ni_ic; 2172 struct ieee80211_node_table *nt = &ic->ic_sta; 2173 struct ieee80211_node *nikey; 2174 ieee80211_keyix keyix; 2175 int isowned, status; 2176 2177 /* 2178 * NB: We must beware of LOR here; deleting the key 2179 * can cause the crypto layer to block traffic updates 2180 * which can generate a LOR against the node table lock; 2181 * grab it here and stash the key index for our use below. 2182 * 2183 * Must also beware of recursion on the node table lock. 2184 * When called from node_cleanup we may already have 2185 * the node table lock held. Unfortunately there's no 2186 * way to separate out this path so we must do this 2187 * conditionally. 2188 */ 2189 isowned = IEEE80211_NODE_IS_LOCKED(nt); 2190 if (!isowned) 2191 IEEE80211_NODE_LOCK(nt); 2192 nikey = NULL; 2193 status = 1; /* NB: success */ 2194 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 2195 keyix = ni->ni_ucastkey.wk_rxkeyix; 2196 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 2197 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 2198 nikey = nt->nt_keyixmap[keyix]; 2199 nt->nt_keyixmap[keyix] = NULL; 2200 } 2201 } 2202 if (!isowned) 2203 IEEE80211_NODE_UNLOCK(nt); 2204 2205 if (nikey != NULL) { 2206 KASSERT(nikey == ni, 2207 ("key map out of sync, ni %p nikey %p", ni, nikey)); 2208 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2209 "%s: delete key map entry %p<%s> refcnt %d\n", 2210 __func__, ni, ether_sprintf(ni->ni_macaddr), 2211 ieee80211_node_refcnt(ni)-1); 2212 ieee80211_free_node(ni); 2213 } 2214 return status; 2215 } 2216 2217 /* 2218 * Reclaim a node. If this is the last reference count then 2219 * do the normal free work. Otherwise remove it from the node 2220 * table and mark it gone by clearing the back-reference. 2221 */ 2222 static void 2223 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2224 { 2225 2226 IEEE80211_NODE_LOCK_ASSERT(nt); 2227 2228 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 2229 "%s: remove %p<%s> from %s table, refcnt %d\n", 2230 __func__, ni, ether_sprintf(ni->ni_macaddr), 2231 nt->nt_name, ieee80211_node_refcnt(ni)-1); 2232 /* 2233 * Clear any entry in the unicast key mapping table. 2234 * We need to do it here so rx lookups don't find it 2235 * in the mapping table even if it's not in the hash 2236 * table. We cannot depend on the mapping table entry 2237 * being cleared because the node may not be free'd. 2238 */ 2239 (void)node_clear_keyixmap(nt, ni); 2240 if (!ieee80211_node_dectestref(ni)) { 2241 /* 2242 * Other references are present, just remove the 2243 * node from the table so it cannot be found. When 2244 * the references are dropped storage will be 2245 * reclaimed. 2246 */ 2247 ieee80211_del_node_nt(nt, ni); 2248 } else 2249 __ieee80211_free_node(ni); 2250 } 2251 2252 /* 2253 * Node table support. 2254 */ 2255 2256 static void 2257 ieee80211_node_table_init(struct ieee80211com *ic, 2258 struct ieee80211_node_table *nt, 2259 const char *name, int inact, int keyixmax) 2260 { 2261 2262 nt->nt_ic = ic; 2263 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 2264 TAILQ_INIT(&nt->nt_node); 2265 nt->nt_count = 0; 2266 nt->nt_name = name; 2267 nt->nt_inact_init = inact; 2268 nt->nt_keyixmax = keyixmax; 2269 if (nt->nt_keyixmax > 0) { 2270 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 2271 keyixmax * sizeof(struct ieee80211_node *), 2272 M_80211_NODE, 2273 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2274 if (nt->nt_keyixmap == NULL) 2275 ic_printf(ic, 2276 "Cannot allocate key index map with %u entries\n", 2277 keyixmax); 2278 } else 2279 nt->nt_keyixmap = NULL; 2280 } 2281 2282 static void 2283 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 2284 struct ieee80211vap *match) 2285 { 2286 struct ieee80211_node *ni, *next; 2287 2288 IEEE80211_NODE_LOCK(nt); 2289 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 2290 if (match != NULL && ni->ni_vap != match) 2291 continue; 2292 /* XXX can this happen? if so need's work */ 2293 if (ni->ni_associd != 0) { 2294 struct ieee80211vap *vap = ni->ni_vap; 2295 2296 if (vap->iv_auth->ia_node_leave != NULL) 2297 vap->iv_auth->ia_node_leave(ni); 2298 if (vap->iv_aid_bitmap != NULL) 2299 IEEE80211_AID_CLR(vap, ni->ni_associd); 2300 } 2301 ni->ni_wdsvap = NULL; /* clear reference */ 2302 node_reclaim(nt, ni); 2303 } 2304 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 2305 /* 2306 * Make a separate pass to clear references to this vap 2307 * held by DWDS entries. They will not be matched above 2308 * because ni_vap will point to the ap vap but we still 2309 * need to clear ni_wdsvap when the WDS vap is destroyed 2310 * and/or reset. 2311 */ 2312 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 2313 if (ni->ni_wdsvap == match) 2314 ni->ni_wdsvap = NULL; 2315 } 2316 IEEE80211_NODE_UNLOCK(nt); 2317 } 2318 2319 static void 2320 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2321 { 2322 ieee80211_node_table_reset(nt, NULL); 2323 if (nt->nt_keyixmap != NULL) { 2324 #ifdef DIAGNOSTIC 2325 /* XXX verify all entries are NULL */ 2326 int i; 2327 for (i = 0; i < nt->nt_keyixmax; i++) 2328 if (nt->nt_keyixmap[i] != NULL) 2329 printf("%s: %s[%u] still active\n", __func__, 2330 nt->nt_name, i); 2331 #endif 2332 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2333 nt->nt_keyixmap = NULL; 2334 } 2335 IEEE80211_NODE_LOCK_DESTROY(nt); 2336 } 2337 2338 static void 2339 timeout_stations(void *arg __unused, struct ieee80211_node *ni) 2340 { 2341 struct ieee80211com *ic = ni->ni_ic; 2342 struct ieee80211vap *vap = ni->ni_vap; 2343 2344 /* 2345 * Only process stations when in RUN state. This 2346 * insures, for example, that we don't timeout an 2347 * inactive station during CAC. Note that CSA state 2348 * is actually handled in ieee80211_node_timeout as 2349 * it applies to more than timeout processing. 2350 */ 2351 if (vap->iv_state != IEEE80211_S_RUN) 2352 return; 2353 /* 2354 * Ignore entries for which have yet to receive an 2355 * authentication frame. These are transient and 2356 * will be reclaimed when the last reference to them 2357 * goes away (when frame xmits complete). 2358 */ 2359 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2360 vap->iv_opmode == IEEE80211_M_STA) && 2361 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2362 return; 2363 /* 2364 * Free fragment if not needed anymore 2365 * (last fragment older than 1s). 2366 * XXX doesn't belong here, move to node_age 2367 */ 2368 if (ni->ni_rxfrag[0] != NULL && 2369 ticks > ni->ni_rxfragstamp + hz) { 2370 m_freem(ni->ni_rxfrag[0]); 2371 ni->ni_rxfrag[0] = NULL; 2372 } 2373 if (ni->ni_inact > 0) { 2374 ni->ni_inact--; 2375 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2376 "%s: inact %u inact_reload %u nrates %u", 2377 __func__, ni->ni_inact, ni->ni_inact_reload, 2378 ni->ni_rates.rs_nrates); 2379 } 2380 /* 2381 * Special case ourself; we may be idle for extended periods 2382 * of time and regardless reclaiming our state is wrong. 2383 * XXX run ic_node_age 2384 */ 2385 /* XXX before inact decrement? */ 2386 if (ni == vap->iv_bss) 2387 return; 2388 if (ni->ni_associd != 0 || 2389 (vap->iv_opmode == IEEE80211_M_IBSS || 2390 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2391 /* 2392 * Age/drain resources held by the station. 2393 */ 2394 ic->ic_node_age(ni); 2395 /* 2396 * Probe the station before time it out. We 2397 * send a null data frame which may not be 2398 * universally supported by drivers (need it 2399 * for ps-poll support so it should be...). 2400 * 2401 * XXX don't probe the station unless we've 2402 * received a frame from them (and have 2403 * some idea of the rates they are capable 2404 * of); this will get fixed more properly 2405 * soon with better handling of the rate set. 2406 */ 2407 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2408 (0 < ni->ni_inact && 2409 ni->ni_inact <= vap->iv_inact_probe) && 2410 ni->ni_rates.rs_nrates != 0) { 2411 IEEE80211_NOTE(vap, 2412 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2413 ni, "%s", 2414 "probe station due to inactivity"); 2415 /* 2416 * Grab a reference so the node cannot 2417 * be reclaimed before we send the frame. 2418 * ieee80211_send_nulldata understands 2419 * we've done this and reclaims the 2420 * ref for us as needed. 2421 */ 2422 /* XXX fix this (not required anymore). */ 2423 ieee80211_ref_node(ni); 2424 /* XXX useless */ 2425 ieee80211_send_nulldata(ni); 2426 /* XXX stat? */ 2427 return; 2428 } 2429 } 2430 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2431 ni->ni_inact <= 0) { 2432 IEEE80211_NOTE(vap, 2433 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2434 "station timed out due to inactivity " 2435 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2436 /* 2437 * Send a deauthenticate frame and drop the station. 2438 * This is somewhat complicated due to reference counts 2439 * and locking. At this point a station will typically 2440 * have a reference count of 2. ieee80211_node_leave 2441 * will do a "free" of the node which will drop the 2442 * reference count. But in the meantime a reference 2443 * wil be held by the deauth frame. The actual reclaim 2444 * of the node will happen either after the tx is 2445 * completed or by ieee80211_node_leave. 2446 */ 2447 if (ni->ni_associd != 0) { 2448 IEEE80211_SEND_MGMT(ni, 2449 IEEE80211_FC0_SUBTYPE_DEAUTH, 2450 IEEE80211_REASON_AUTH_EXPIRE); 2451 } 2452 ieee80211_node_leave(ni); 2453 vap->iv_stats.is_node_timeout++; 2454 } 2455 } 2456 2457 /* 2458 * Timeout inactive stations and do related housekeeping. 2459 */ 2460 static void 2461 ieee80211_timeout_stations(struct ieee80211com *ic) 2462 { 2463 struct ieee80211_node_table *nt = &ic->ic_sta; 2464 2465 ieee80211_iterate_nodes(nt, timeout_stations, NULL); 2466 } 2467 2468 /* 2469 * Aggressively reclaim resources. This should be used 2470 * only in a critical situation to reclaim mbuf resources. 2471 */ 2472 void 2473 ieee80211_drain(struct ieee80211com *ic) 2474 { 2475 struct ieee80211_node_table *nt = &ic->ic_sta; 2476 struct ieee80211vap *vap; 2477 struct ieee80211_node *ni; 2478 2479 IEEE80211_NODE_LOCK(nt); 2480 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2481 /* 2482 * Ignore entries for which have yet to receive an 2483 * authentication frame. These are transient and 2484 * will be reclaimed when the last reference to them 2485 * goes away (when frame xmits complete). 2486 */ 2487 vap = ni->ni_vap; 2488 /* 2489 * Only process stations when in RUN state. This 2490 * insures, for example, that we don't timeout an 2491 * inactive station during CAC. Note that CSA state 2492 * is actually handled in ieee80211_node_timeout as 2493 * it applies to more than timeout processing. 2494 */ 2495 if (vap->iv_state != IEEE80211_S_RUN) 2496 continue; 2497 /* XXX can vap be NULL? */ 2498 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2499 vap->iv_opmode == IEEE80211_M_STA) && 2500 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2501 continue; 2502 /* 2503 * Free fragments. 2504 * XXX doesn't belong here, move to node_drain 2505 */ 2506 if (ni->ni_rxfrag[0] != NULL) { 2507 m_freem(ni->ni_rxfrag[0]); 2508 ni->ni_rxfrag[0] = NULL; 2509 } 2510 /* 2511 * Drain resources held by the station. 2512 */ 2513 ic->ic_node_drain(ni); 2514 } 2515 IEEE80211_NODE_UNLOCK(nt); 2516 } 2517 2518 /* 2519 * Per-ieee80211vap inactivity timer callback. 2520 */ 2521 static void 2522 ieee80211_vap_timeout(struct ieee80211vap *vap) 2523 { 2524 2525 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2526 2527 ieee80211_vap_erp_timeout(vap); 2528 ieee80211_ht_timeout(vap); 2529 ieee80211_vht_timeout(vap); 2530 } 2531 2532 /* 2533 * Per-ieee80211com inactivity timer callback. 2534 */ 2535 void 2536 ieee80211_node_timeout(void *arg) 2537 { 2538 struct ieee80211com *ic = arg; 2539 struct ieee80211vap *vap; 2540 2541 /* 2542 * Defer timeout processing if a channel switch is pending. 2543 * We typically need to be mute so not doing things that 2544 * might generate frames is good to handle in one place. 2545 * Suppressing the station timeout processing may extend the 2546 * lifetime of inactive stations (by not decrementing their 2547 * idle counters) but this should be ok unless the CSA is 2548 * active for an unusually long time. 2549 */ 2550 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2551 ieee80211_scan_timeout(ic); 2552 ieee80211_timeout_stations(ic); 2553 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2554 2555 IEEE80211_LOCK(ic); 2556 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2557 ieee80211_vap_timeout(vap); 2558 IEEE80211_UNLOCK(ic); 2559 } 2560 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2561 ieee80211_node_timeout, ic); 2562 } 2563 2564 /* 2565 * The same as ieee80211_iterate_nodes(), but for one vap only. 2566 */ 2567 int 2568 ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, 2569 struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) 2570 { 2571 struct ieee80211_node **ni_arr; 2572 struct ieee80211_node *ni; 2573 size_t size; 2574 int count, i; 2575 2576 /* 2577 * Iterate over the node table and save an array of ref'ed nodes. 2578 * 2579 * This is separated out from calling the actual node function so that 2580 * no LORs will occur. 2581 */ 2582 IEEE80211_NODE_LOCK(nt); 2583 count = nt->nt_count; 2584 size = count * sizeof(struct ieee80211_node *); 2585 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2586 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2587 if (ni_arr == NULL) { 2588 IEEE80211_NODE_UNLOCK(nt); 2589 return (ENOMEM); 2590 } 2591 2592 i = 0; 2593 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2594 if (vap != NULL && ni->ni_vap != vap) 2595 continue; 2596 KASSERT(i < count, 2597 ("node array overflow (vap %p, i %d, count %d)\n", 2598 vap, i, count)); 2599 ni_arr[i] = ieee80211_ref_node(ni); 2600 i++; 2601 } 2602 IEEE80211_NODE_UNLOCK(nt); 2603 2604 for (i = 0; i < count; i++) { 2605 if (ni_arr[i] == NULL) /* end of the list */ 2606 break; 2607 (*f)(arg, ni_arr[i]); 2608 /* ieee80211_free_node() locks by itself */ 2609 ieee80211_free_node(ni_arr[i]); 2610 } 2611 2612 IEEE80211_FREE(ni_arr, M_80211_NODE); 2613 2614 return (0); 2615 } 2616 2617 /* 2618 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2619 * reference in the source. 2620 */ 2621 void 2622 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2623 ieee80211_iter_func *f, void *arg) 2624 { 2625 /* XXX no way to pass error to the caller. */ 2626 (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); 2627 } 2628 2629 void 2630 ieee80211_dump_node(struct ieee80211_node_table *nt __unused, 2631 struct ieee80211_node *ni) 2632 { 2633 printf("%p: mac %s refcnt %d\n", ni, 2634 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2635 printf("\tauthmode %u flags 0x%x\n", 2636 ni->ni_authmode, ni->ni_flags); 2637 printf("\tassocid 0x%x txpower %u vlan %u\n", 2638 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2639 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2640 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2641 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2642 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2643 ni->ni_rxfragstamp); 2644 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2645 node_getrssi(ni), ni->ni_noise, 2646 ni->ni_intval, ni->ni_capinfo); 2647 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2648 ether_sprintf(ni->ni_bssid), 2649 ni->ni_esslen, ni->ni_essid, 2650 (ni->ni_chan != IEEE80211_CHAN_ANYC) ? ni->ni_chan->ic_freq : 0, 2651 (ni->ni_chan != IEEE80211_CHAN_ANYC) ? ni->ni_chan->ic_flags : 0); 2652 printf("\tinact %u inact_reload %u txrate %u\n", 2653 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2654 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2655 ni->ni_htcap, ni->ni_htparam, 2656 ni->ni_htctlchan, ni->ni_ht2ndchan); 2657 printf("\thtopmode %x htstbc %x htchw %u\n", 2658 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2659 printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", 2660 ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, 2661 (int) ni->ni_vht_basicmcs); 2662 /* XXX VHT state */ 2663 } 2664 2665 void 2666 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2667 { 2668 ieee80211_iterate_nodes(nt, 2669 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2670 } 2671 2672 /* 2673 * Iterate over the VAPs and update their ERP beacon IEs. 2674 * 2675 * Note this must be called from the deferred ERP update task paths. 2676 */ 2677 void 2678 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2679 { 2680 struct ieee80211vap *vap; 2681 2682 IEEE80211_LOCK_ASSERT(ic); 2683 2684 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2685 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2686 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2687 } 2688 2689 /* 2690 * Handle a station joining an 11g network. 2691 */ 2692 static void 2693 ieee80211_node_join_11g(struct ieee80211_node *ni) 2694 { 2695 struct ieee80211com *ic = ni->ni_ic; 2696 struct ieee80211vap *vap = ni->ni_vap; 2697 2698 IEEE80211_LOCK_ASSERT(ic); 2699 2700 /* 2701 * Station isn't capable of short slot time. Bump 2702 * the count of long slot time stations and disable 2703 * use of short slot time. Note that the actual switch 2704 * over to long slot time use may not occur until the 2705 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2706 */ 2707 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2708 vap->iv_longslotsta++; 2709 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2710 "station needs long slot time, count %d", 2711 vap->iv_longslotsta); 2712 /* 2713 * XXX TODO: this may need all VAPs checked! 2714 */ 2715 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2716 /* 2717 * Don't force slot time when switched to turbo 2718 * mode as non-ERP stations won't be present; this 2719 * need only be done when on the normal G channel. 2720 */ 2721 ieee80211_vap_set_shortslottime(vap, 0); 2722 } 2723 } 2724 /* 2725 * If the new station is not an ERP station 2726 * then bump the counter and enable protection 2727 * if configured. 2728 */ 2729 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2730 vap->iv_nonerpsta++; 2731 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2732 "station is !ERP, %d non-ERP stations associated", 2733 vap->iv_nonerpsta); 2734 /* 2735 * If station does not support short preamble 2736 * then we must enable use of Barker preamble. 2737 */ 2738 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2739 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2740 "%s", "station needs long preamble"); 2741 vap->iv_flags |= IEEE80211_F_USEBARKER; 2742 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; 2743 ieee80211_vap_update_preamble(vap); 2744 } 2745 /* 2746 * If protection is configured and this is the first 2747 * indication we should use protection, enable it. 2748 */ 2749 if (vap->iv_protmode != IEEE80211_PROT_NONE && 2750 vap->iv_nonerpsta == 1 && 2751 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2752 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2753 "%s: enable use of protection\n", __func__); 2754 vap->iv_flags |= IEEE80211_F_USEPROT; 2755 ieee80211_vap_update_erp_protmode(vap); 2756 } 2757 } else 2758 ni->ni_flags |= IEEE80211_NODE_ERP; 2759 } 2760 2761 void 2762 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2763 { 2764 struct ieee80211com *ic = ni->ni_ic; 2765 struct ieee80211vap *vap = ni->ni_vap; 2766 int newassoc; 2767 2768 if (ni->ni_associd == 0) { 2769 uint16_t aid; 2770 2771 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2772 /* 2773 * It would be good to search the bitmap 2774 * more efficiently, but this will do for now. 2775 */ 2776 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2777 if (!IEEE80211_AID_ISSET(vap, aid)) 2778 break; 2779 } 2780 if (aid >= vap->iv_max_aid) { 2781 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2782 ieee80211_node_leave(ni); 2783 return; 2784 } 2785 ni->ni_associd = aid | 0xc000; 2786 ni->ni_jointime = time_uptime; 2787 IEEE80211_LOCK(ic); 2788 IEEE80211_AID_SET(vap, ni->ni_associd); 2789 vap->iv_sta_assoc++; 2790 2791 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2792 ieee80211_ht_node_join(ni); 2793 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2794 ieee80211_vht_node_join(ni); 2795 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2796 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2797 ieee80211_node_join_11g(ni); 2798 IEEE80211_UNLOCK(ic); 2799 2800 newassoc = 1; 2801 } else 2802 newassoc = 0; 2803 2804 /* 2805 * XXX VHT - should log VHT channel width, etc 2806 */ 2807 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2808 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 2809 IEEE80211_NODE_AID(ni), 2810 vap->iv_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2811 vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2812 vap->iv_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2813 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2814 /* XXX update for VHT string */ 2815 ni->ni_flags & IEEE80211_NODE_HT ? 2816 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2817 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2818 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 2819 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2820 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2821 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2822 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2823 ", fast-frames" : "", 2824 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2825 ", turbo" : "" 2826 ); 2827 2828 ieee80211_node_setuptxparms(ni); 2829 ieee80211_ratectl_node_init(ni); 2830 /* give driver a chance to setup state like ni_txrate */ 2831 if (ic->ic_newassoc != NULL) 2832 ic->ic_newassoc(ni, newassoc); 2833 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2834 /* tell the authenticator about new station */ 2835 if (vap->iv_auth->ia_node_join != NULL) 2836 vap->iv_auth->ia_node_join(ni); 2837 ieee80211_notify_node_join(ni, 2838 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2839 } 2840 2841 static void 2842 disable_protection(struct ieee80211vap *vap) 2843 { 2844 struct ieee80211com *ic = vap->iv_ic; 2845 2846 KASSERT(vap->iv_nonerpsta == 0 && 2847 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2848 ("%d non ERP stations, flags 0x%x", vap->iv_nonerpsta, 2849 vap->iv_flags_ext)); 2850 2851 vap->iv_flags &= ~IEEE80211_F_USEPROT; 2852 /* XXX verify mode? */ 2853 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2854 vap->iv_flags |= IEEE80211_F_SHPREAMBLE; 2855 vap->iv_flags &= ~IEEE80211_F_USEBARKER; 2856 } 2857 ieee80211_vap_update_erp_protmode(vap); 2858 ieee80211_vap_update_preamble(vap); 2859 } 2860 2861 /* 2862 * Handle a station leaving an 11g network. 2863 */ 2864 static void 2865 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2866 { 2867 struct ieee80211com *ic = ni->ni_ic; 2868 struct ieee80211vap *vap = ni->ni_vap; 2869 2870 IEEE80211_LOCK_ASSERT(ic); 2871 2872 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2873 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2874 ic->ic_bsschan->ic_flags)); 2875 2876 /* 2877 * If a long slot station do the slot time bookkeeping. 2878 */ 2879 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2880 KASSERT(vap->iv_longslotsta > 0, 2881 ("bogus long slot station count %d", vap->iv_longslotsta)); 2882 vap->iv_longslotsta--; 2883 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2884 "long slot time station leaves, count now %d", 2885 vap->iv_longslotsta); 2886 /* 2887 * XXX TODO: this may need all VAPs checked! 2888 */ 2889 if (vap->iv_longslotsta == 0) { 2890 /* 2891 * Re-enable use of short slot time if supported 2892 * and not operating in IBSS mode (per spec). 2893 */ 2894 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2895 ic->ic_opmode != IEEE80211_M_IBSS) { 2896 IEEE80211_DPRINTF(ni->ni_vap, 2897 IEEE80211_MSG_ASSOC, 2898 "%s: re-enable use of short slot time\n", 2899 __func__); 2900 ieee80211_vap_set_shortslottime(vap, 1); 2901 } 2902 } 2903 } 2904 /* 2905 * If a non-ERP station do the protection-related bookkeeping. 2906 */ 2907 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2908 KASSERT(vap->iv_nonerpsta > 0, 2909 ("bogus non-ERP station count %d", vap->iv_nonerpsta)); 2910 vap->iv_nonerpsta--; 2911 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2912 "non-ERP station leaves, count now %d%s", vap->iv_nonerpsta, 2913 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2914 " (non-ERP sta present)" : ""); 2915 if (vap->iv_nonerpsta == 0 && 2916 (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2917 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2918 "%s: disable use of protection\n", __func__); 2919 disable_protection(vap); 2920 } 2921 } 2922 } 2923 2924 /* 2925 * Time out presence of an overlapping bss with non-ERP 2926 * stations. When operating in hostap mode we listen for 2927 * beacons from other stations and if we identify a non-ERP 2928 * station is present we enable protection. To identify 2929 * when all non-ERP stations are gone we time out this 2930 * condition. 2931 */ 2932 static void 2933 ieee80211_vap_erp_timeout(struct ieee80211vap *vap) 2934 { 2935 2936 IEEE80211_LOCK_ASSERT(vap->iv_ic); 2937 2938 if ((vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2939 ieee80211_time_after(ticks, vap->iv_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2940 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 2941 "%s", "age out non-ERP sta present on channel"); 2942 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2943 if (vap->iv_nonerpsta == 0) 2944 disable_protection(vap); 2945 } 2946 } 2947 2948 /* 2949 * Handle bookkeeping for station deauthentication/disassociation 2950 * when operating as an ap. 2951 */ 2952 void 2953 ieee80211_node_leave(struct ieee80211_node *ni) 2954 { 2955 struct ieee80211com *ic = ni->ni_ic; 2956 struct ieee80211vap *vap = ni->ni_vap; 2957 struct ieee80211_node_table *nt = ni->ni_table; 2958 2959 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2960 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2961 2962 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2963 ("unexpected operating mode %u", vap->iv_opmode)); 2964 /* 2965 * If node wasn't previously associated all 2966 * we need to do is reclaim the reference. 2967 */ 2968 /* XXX ibss mode bypasses 11g and notification */ 2969 if (ni->ni_associd == 0) 2970 goto done; 2971 /* 2972 * Tell the authenticator the station is leaving. 2973 * Note that we must do this before yanking the 2974 * association id as the authenticator uses the 2975 * associd to locate it's state block. 2976 */ 2977 if (vap->iv_auth->ia_node_leave != NULL) 2978 vap->iv_auth->ia_node_leave(ni); 2979 2980 IEEE80211_LOCK(ic); 2981 IEEE80211_AID_CLR(vap, ni->ni_associd); 2982 vap->iv_sta_assoc--; 2983 2984 if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) 2985 ieee80211_vht_node_leave(ni); 2986 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2987 ieee80211_ht_node_leave(ni); 2988 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2989 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2990 ieee80211_node_leave_11g(ni); 2991 IEEE80211_UNLOCK(ic); 2992 /* 2993 * Cleanup station state. In particular clear various 2994 * state that might otherwise be reused if the node 2995 * is reused before the reference count goes to zero 2996 * (and memory is reclaimed). 2997 */ 2998 ieee80211_sta_leave(ni); 2999 done: 3000 /* 3001 * Remove the node from any table it's recorded in and 3002 * drop the caller's reference. Removal from the table 3003 * is important to insure the node is not reprocessed 3004 * for inactivity. 3005 */ 3006 if (nt != NULL) { 3007 IEEE80211_NODE_LOCK(nt); 3008 node_reclaim(nt, ni); 3009 IEEE80211_NODE_UNLOCK(nt); 3010 } else 3011 ieee80211_free_node(ni); 3012 } 3013 3014 struct rssiinfo { 3015 int rssi_samples; 3016 uint32_t rssi_total; 3017 }; 3018 3019 static void 3020 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 3021 { 3022 struct rssiinfo *info = arg; 3023 struct ieee80211vap *vap = ni->ni_vap; 3024 int8_t rssi; 3025 3026 /* only associated stations */ 3027 if (ni->ni_associd == 0) 3028 return; 3029 rssi = vap->iv_ic->ic_node_getrssi(ni); 3030 if (rssi != 0) { 3031 info->rssi_samples++; 3032 info->rssi_total += rssi; 3033 } 3034 } 3035 3036 static void 3037 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 3038 { 3039 struct rssiinfo *info = arg; 3040 struct ieee80211vap *vap = ni->ni_vap; 3041 int8_t rssi; 3042 3043 /* only neighbors */ 3044 /* XXX check bssid */ 3045 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 3046 return; 3047 rssi = vap->iv_ic->ic_node_getrssi(ni); 3048 if (rssi != 0) { 3049 info->rssi_samples++; 3050 info->rssi_total += rssi; 3051 } 3052 } 3053 3054 #ifdef IEEE80211_SUPPORT_MESH 3055 static void 3056 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 3057 { 3058 struct rssiinfo *info = arg; 3059 struct ieee80211vap *vap = ni->ni_vap; 3060 int8_t rssi; 3061 3062 /* only neighbors that peered successfully */ 3063 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 3064 return; 3065 rssi = vap->iv_ic->ic_node_getrssi(ni); 3066 if (rssi != 0) { 3067 info->rssi_samples++; 3068 info->rssi_total += rssi; 3069 } 3070 } 3071 #endif /* IEEE80211_SUPPORT_MESH */ 3072 3073 int8_t 3074 ieee80211_getrssi(struct ieee80211vap *vap) 3075 { 3076 #define NZ(x) ((x) == 0 ? 1 : (x)) 3077 struct ieee80211com *ic = vap->iv_ic; 3078 struct rssiinfo info; 3079 3080 info.rssi_total = 0; 3081 info.rssi_samples = 0; 3082 switch (vap->iv_opmode) { 3083 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 3084 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 3085 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, 3086 &info); 3087 break; 3088 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 3089 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, 3090 &info); 3091 break; 3092 #ifdef IEEE80211_SUPPORT_MESH 3093 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 3094 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, 3095 &info); 3096 break; 3097 #endif 3098 case IEEE80211_M_MONITOR: /* XXX */ 3099 case IEEE80211_M_STA: /* use stats from associated ap */ 3100 default: 3101 if (vap->iv_bss != NULL) 3102 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 3103 info.rssi_samples = 1; 3104 break; 3105 } 3106 return info.rssi_total / NZ(info.rssi_samples); 3107 #undef NZ 3108 } 3109 3110 void 3111 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 3112 { 3113 3114 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 3115 return; 3116 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 3117 /* for non-station mode return avg'd rssi accounting */ 3118 if (vap->iv_opmode != IEEE80211_M_STA) 3119 *rssi = ieee80211_getrssi(vap); 3120 } 3121