ieee80211_node.c revision 211295
150472Speter/*- 233975Sjdp * Copyright (c) 2001 Atsushi Onoe 333975Sjdp * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 433975Sjdp * All rights reserved. 544360Simp * 633975Sjdp * Redistribution and use in source and binary forms, with or without 784902Sobrien * modification, are permitted provided that the following conditions 8218822Sdim * are met: 9218822Sdim * 1. Redistributions of source code must retain the above copyright 10218822Sdim * notice, this list of conditions and the following disclaimer. 11218822Sdim * 2. Redistributions in binary form must reproduce the above copyright 12218822Sdim * notice, this list of conditions and the following disclaimer in the 13218822Sdim * documentation and/or other materials provided with the distribution. 14218822Sdim * 15218822Sdim * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16218822Sdim * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17218822Sdim * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18218822Sdim * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19218822Sdim * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20218822Sdim * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21218822Sdim * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22218822Sdim * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23218822Sdim * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24218822Sdim * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25218822Sdim */ 26218822Sdim 27218822Sdim#include <sys/cdefs.h> 28218822Sdim__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_node.c 211295 2010-08-14 09:29:42Z bschmidt $"); 29218822Sdim 30218822Sdim#include "opt_wlan.h" 31218822Sdim 32218822Sdim#include <sys/param.h> 33218822Sdim#include <sys/systm.h> 34218822Sdim#include <sys/mbuf.h> 35218822Sdim#include <sys/malloc.h> 36218822Sdim#include <sys/kernel.h> 37218822Sdim 38218822Sdim#include <sys/socket.h> 39218822Sdim 40218822Sdim#include <net/if.h> 41218822Sdim#include <net/if_media.h> 42218822Sdim#include <net/ethernet.h> 43218822Sdim 44218822Sdim#include <net80211/ieee80211_var.h> 45203434Simp#include <net80211/ieee80211_input.h> 46126197Sjohan#ifdef IEEE80211_SUPPORT_SUPERG 4792257Sobrien#include <net80211/ieee80211_superg.h> 48130575Sobrien#endif 4984902Sobrien#ifdef IEEE80211_SUPPORT_TDMA 50136910Sru#include <net80211/ieee80211_tdma.h> 51130575Sobrien#endif 5233975Sjdp#include <net80211/ieee80211_wds.h> 5335711Sjb#include <net80211/ieee80211_mesh.h> 54114050Sobrien#include <net80211/ieee80211_ratectl.h> 55114050Sobrien 56114050Sobrien#include <net/bpf.h> 5784902Sobrien 5858953Ssteve/* 5935711Sjb * IEEE80211_NODE_HASHSIZE must be a power of 2. 6035711Sjb */ 6184902SobrienCTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 6235711Sjb 6384902Sobrien/* 6435711Sjb * Association id's are managed with a bit vector. 6535711Sjb */ 6658953Ssteve#define IEEE80211_AID_SET(_vap, b) \ 6784902Sobrien ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 6835711Sjb (1 << (IEEE80211_AID(b) % 32))) 6935711Sjb#define IEEE80211_AID_CLR(_vap, b) \ 7035711Sjb ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 71107506Sobrien ~(1 << (IEEE80211_AID(b) % 32))) 7235711Sjb#define IEEE80211_AID_ISSET(_vap, b) \ 7384902Sobrien ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 7435711Sjb 7584902Sobrien#ifdef IEEE80211_DEBUG_REFCNT 7635711Sjb#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 7735711Sjb#else 7884902Sobrien#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 79131832Sobrien#endif 80218822Sdim 8135711Sjbstatic int ieee80211_sta_join1(struct ieee80211_node *); 82130575Sobrien 83130575Sobrienstatic struct ieee80211_node *node_alloc(struct ieee80211vap *, 84218822Sdim const uint8_t [IEEE80211_ADDR_LEN]); 85218822Sdimstatic void node_cleanup(struct ieee80211_node *); 86130575Sobrienstatic void node_free(struct ieee80211_node *); 87218822Sdimstatic void node_age(struct ieee80211_node *); 88130575Sobrienstatic int8_t node_getrssi(const struct ieee80211_node *); 8933975Sjdpstatic void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 9033975Sjdpstatic void node_getmimoinfo(const struct ieee80211_node *, 91130740Smarcel struct ieee80211_mimo_info *); 9284905Sobrien 93103780Sobrienstatic void _ieee80211_free_node(struct ieee80211_node *); 9484905Sobrien 9584905Sobrienstatic void ieee80211_node_table_init(struct ieee80211com *ic, 9684905Sobrien struct ieee80211_node_table *nt, const char *name, 9784905Sobrien int inact, int keymaxix); 9833975Sjdpstatic void ieee80211_node_table_reset(struct ieee80211_node_table *, 99131832Sobrien struct ieee80211vap *); 100130743Smarcelstatic void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 101130743Smarcelstatic void ieee80211_erp_timeout(struct ieee80211com *); 102130743Smarcel 103130743SmarcelMALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 104130743SmarcelMALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 105130743Smarcel 10633975Sjdpvoid 107ieee80211_node_attach(struct ieee80211com *ic) 108{ 109 /* XXX really want maxlen enforced per-sta */ 110 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 111 "802.11 staging q"); 112 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 113 IEEE80211_INACT_INIT, ic->ic_max_keyix); 114 callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 115 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 116 ieee80211_node_timeout, ic); 117 118 ic->ic_node_alloc = node_alloc; 119 ic->ic_node_free = node_free; 120 ic->ic_node_cleanup = node_cleanup; 121 ic->ic_node_age = node_age; 122 ic->ic_node_drain = node_age; /* NB: same as age */ 123 ic->ic_node_getrssi = node_getrssi; 124 ic->ic_node_getsignal = node_getsignal; 125 ic->ic_node_getmimoinfo = node_getmimoinfo; 126 127 /* 128 * Set flags to be propagated to all vap's; 129 * these define default behaviour/configuration. 130 */ 131 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 132} 133 134void 135ieee80211_node_detach(struct ieee80211com *ic) 136{ 137 138 callout_drain(&ic->ic_inact); 139 ieee80211_node_table_cleanup(&ic->ic_sta); 140 ieee80211_ageq_cleanup(&ic->ic_stageq); 141} 142 143void 144ieee80211_node_vattach(struct ieee80211vap *vap) 145{ 146 /* NB: driver can override */ 147 vap->iv_max_aid = IEEE80211_AID_DEF; 148 149 /* default station inactivity timer setings */ 150 vap->iv_inact_init = IEEE80211_INACT_INIT; 151 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 152 vap->iv_inact_run = IEEE80211_INACT_RUN; 153 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 154 155 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 156 "%s: init %u auth %u run %u probe %u\n", __func__, 157 vap->iv_inact_init, vap->iv_inact_auth, 158 vap->iv_inact_run, vap->iv_inact_probe); 159} 160 161void 162ieee80211_node_latevattach(struct ieee80211vap *vap) 163{ 164 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 165 /* XXX should we allow max aid to be zero? */ 166 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 167 vap->iv_max_aid = IEEE80211_AID_MIN; 168 if_printf(vap->iv_ifp, 169 "WARNING: max aid too small, changed to %d\n", 170 vap->iv_max_aid); 171 } 172 vap->iv_aid_bitmap = (uint32_t *) malloc( 173 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 174 M_80211_NODE, M_NOWAIT | M_ZERO); 175 if (vap->iv_aid_bitmap == NULL) { 176 /* XXX no way to recover */ 177 printf("%s: no memory for AID bitmap, max aid %d!\n", 178 __func__, vap->iv_max_aid); 179 vap->iv_max_aid = 0; 180 } 181 } 182 183 ieee80211_reset_bss(vap); 184 185 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 186} 187 188void 189ieee80211_node_vdetach(struct ieee80211vap *vap) 190{ 191 struct ieee80211com *ic = vap->iv_ic; 192 193 ieee80211_node_table_reset(&ic->ic_sta, vap); 194 if (vap->iv_bss != NULL) { 195 ieee80211_free_node(vap->iv_bss); 196 vap->iv_bss = NULL; 197 } 198 if (vap->iv_aid_bitmap != NULL) { 199 free(vap->iv_aid_bitmap, M_80211_NODE); 200 vap->iv_aid_bitmap = NULL; 201 } 202} 203 204/* 205 * Port authorize/unauthorize interfaces for use by an authenticator. 206 */ 207 208void 209ieee80211_node_authorize(struct ieee80211_node *ni) 210{ 211 struct ieee80211vap *vap = ni->ni_vap; 212 213 ni->ni_flags |= IEEE80211_NODE_AUTH; 214 ni->ni_inact_reload = vap->iv_inact_run; 215 ni->ni_inact = ni->ni_inact_reload; 216 217 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 218 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 219} 220 221void 222ieee80211_node_unauthorize(struct ieee80211_node *ni) 223{ 224 struct ieee80211vap *vap = ni->ni_vap; 225 226 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 227 ni->ni_inact_reload = vap->iv_inact_auth; 228 if (ni->ni_inact > ni->ni_inact_reload) 229 ni->ni_inact = ni->ni_inact_reload; 230 231 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 232 "%s: inact_reload %u inact %u", __func__, 233 ni->ni_inact_reload, ni->ni_inact); 234} 235 236/* 237 * Fix tx parameters for a node according to ``association state''. 238 */ 239void 240ieee80211_node_setuptxparms(struct ieee80211_node *ni) 241{ 242 struct ieee80211vap *vap = ni->ni_vap; 243 enum ieee80211_phymode mode; 244 245 if (ni->ni_flags & IEEE80211_NODE_HT) { 246 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 247 mode = IEEE80211_MODE_11NA; 248 else 249 mode = IEEE80211_MODE_11NG; 250 } else { /* legacy rate handling */ 251 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 252 mode = IEEE80211_MODE_STURBO_A; 253 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 254 mode = IEEE80211_MODE_HALF; 255 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 256 mode = IEEE80211_MODE_QUARTER; 257 /* NB: 108A should be handled as 11a */ 258 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 259 mode = IEEE80211_MODE_11A; 260 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 261 (ni->ni_flags & IEEE80211_NODE_ERP)) 262 mode = IEEE80211_MODE_11G; 263 else 264 mode = IEEE80211_MODE_11B; 265 } 266 ni->ni_txparms = &vap->iv_txparms[mode]; 267} 268 269/* 270 * Set/change the channel. The rate set is also updated as 271 * to insure a consistent view by drivers. 272 * XXX should be private but hostap needs it to deal with CSA 273 */ 274void 275ieee80211_node_set_chan(struct ieee80211_node *ni, 276 struct ieee80211_channel *chan) 277{ 278 struct ieee80211com *ic = ni->ni_ic; 279 struct ieee80211vap *vap = ni->ni_vap; 280 enum ieee80211_phymode mode; 281 282 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 283 284 ni->ni_chan = chan; 285 mode = ieee80211_chan2mode(chan); 286 if (IEEE80211_IS_CHAN_HT(chan)) { 287 /* 288 * XXX Gotta be careful here; the rate set returned by 289 * ieee80211_get_suprates is actually any HT rate 290 * set so blindly copying it will be bad. We must 291 * install the legacy rate est in ni_rates and the 292 * HT rate set in ni_htrates. 293 */ 294 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 295 /* 296 * Setup bss tx parameters based on operating mode. We 297 * use legacy rates when operating in a mixed HT+non-HT bss 298 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 299 */ 300 if (mode == IEEE80211_MODE_11NA && 301 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 302 mode = IEEE80211_MODE_11A; 303 else if (mode == IEEE80211_MODE_11NG && 304 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 305 mode = IEEE80211_MODE_11G; 306 if (mode == IEEE80211_MODE_11G && 307 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 308 mode = IEEE80211_MODE_11B; 309 } 310 ni->ni_txparms = &vap->iv_txparms[mode]; 311 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 312} 313 314static __inline void 315copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 316{ 317 /* propagate useful state */ 318 nbss->ni_authmode = obss->ni_authmode; 319 nbss->ni_txpower = obss->ni_txpower; 320 nbss->ni_vlan = obss->ni_vlan; 321 /* XXX statistics? */ 322 /* XXX legacy WDS bssid? */ 323} 324 325void 326ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 327{ 328 struct ieee80211com *ic = vap->iv_ic; 329 struct ieee80211_node *ni; 330 331 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 332 "%s: creating %s on channel %u\n", __func__, 333 ieee80211_opmode_name[vap->iv_opmode], 334 ieee80211_chan2ieee(ic, chan)); 335 336 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 337 if (ni == NULL) { 338 /* XXX recovery? */ 339 return; 340 } 341 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 342 ni->ni_esslen = vap->iv_des_ssid[0].len; 343 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 344 if (vap->iv_bss != NULL) 345 copy_bss(ni, vap->iv_bss); 346 ni->ni_intval = ic->ic_bintval; 347 if (vap->iv_flags & IEEE80211_F_PRIVACY) 348 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 349 if (ic->ic_phytype == IEEE80211_T_FH) { 350 ni->ni_fhdwell = 200; /* XXX */ 351 ni->ni_fhindex = 1; 352 } 353 if (vap->iv_opmode == IEEE80211_M_IBSS) { 354 vap->iv_flags |= IEEE80211_F_SIBSS; 355 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 356 if (vap->iv_flags & IEEE80211_F_DESBSSID) 357 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 358 else { 359 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 360 /* clear group bit, add local bit */ 361 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 362 } 363 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 364 if (vap->iv_flags & IEEE80211_F_DESBSSID) 365 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 366 else 367#ifdef IEEE80211_SUPPORT_TDMA 368 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 369#endif 370 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 371#ifdef IEEE80211_SUPPORT_MESH 372 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 373 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 374 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 375#endif 376 } 377 /* 378 * Fix the channel and related attributes. 379 */ 380 /* clear DFS CAC state on previous channel */ 381 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 382 ic->ic_bsschan->ic_freq != chan->ic_freq && 383 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 384 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 385 ic->ic_bsschan = chan; 386 ieee80211_node_set_chan(ni, chan); 387 ic->ic_curmode = ieee80211_chan2mode(chan); 388 /* 389 * Do mode-specific setup. 390 */ 391 if (IEEE80211_IS_CHAN_FULL(chan)) { 392 if (IEEE80211_IS_CHAN_ANYG(chan)) { 393 /* 394 * Use a mixed 11b/11g basic rate set. 395 */ 396 ieee80211_setbasicrates(&ni->ni_rates, 397 IEEE80211_MODE_11G); 398 if (vap->iv_flags & IEEE80211_F_PUREG) { 399 /* 400 * Also mark OFDM rates basic so 11b 401 * stations do not join (WiFi compliance). 402 */ 403 ieee80211_addbasicrates(&ni->ni_rates, 404 IEEE80211_MODE_11A); 405 } 406 } else if (IEEE80211_IS_CHAN_B(chan)) { 407 /* 408 * Force pure 11b rate set. 409 */ 410 ieee80211_setbasicrates(&ni->ni_rates, 411 IEEE80211_MODE_11B); 412 } 413 } 414 415 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 416} 417 418/* 419 * Reset bss state on transition to the INIT state. 420 * Clear any stations from the table (they have been 421 * deauth'd) and reset the bss node (clears key, rate 422 * etc. state). 423 */ 424void 425ieee80211_reset_bss(struct ieee80211vap *vap) 426{ 427 struct ieee80211com *ic = vap->iv_ic; 428 struct ieee80211_node *ni, *obss; 429 430 ieee80211_node_table_reset(&ic->ic_sta, vap); 431 /* XXX multi-bss: wrong */ 432 ieee80211_reset_erp(ic); 433 434 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 435 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 436 obss = vap->iv_bss; 437 vap->iv_bss = ieee80211_ref_node(ni); 438 if (obss != NULL) { 439 copy_bss(ni, obss); 440 ni->ni_intval = ic->ic_bintval; 441 ieee80211_free_node(obss); 442 } else 443 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 444} 445 446static int 447match_ssid(const struct ieee80211_node *ni, 448 int nssid, const struct ieee80211_scan_ssid ssids[]) 449{ 450 int i; 451 452 for (i = 0; i < nssid; i++) { 453 if (ni->ni_esslen == ssids[i].len && 454 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 455 return 1; 456 } 457 return 0; 458} 459 460/* 461 * Test a node for suitability/compatibility. 462 */ 463static int 464check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 465{ 466 struct ieee80211com *ic = ni->ni_ic; 467 uint8_t rate; 468 469 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 470 return 0; 471 if (vap->iv_opmode == IEEE80211_M_IBSS) { 472 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 473 return 0; 474 } else { 475 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 476 return 0; 477 } 478 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 479 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 480 return 0; 481 } else { 482 /* XXX does this mean privacy is supported or required? */ 483 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 484 return 0; 485 } 486 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 487 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 488 if (rate & IEEE80211_RATE_BASIC) 489 return 0; 490 if (vap->iv_des_nssid != 0 && 491 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 492 return 0; 493 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 494 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 495 return 0; 496 return 1; 497} 498 499#ifdef IEEE80211_DEBUG 500/* 501 * Display node suitability/compatibility. 502 */ 503static void 504check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 505{ 506 struct ieee80211com *ic = ni->ni_ic; 507 uint8_t rate; 508 int fail; 509 510 fail = 0; 511 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 512 fail |= 0x01; 513 if (vap->iv_opmode == IEEE80211_M_IBSS) { 514 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 515 fail |= 0x02; 516 } else { 517 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 518 fail |= 0x02; 519 } 520 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 521 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 522 fail |= 0x04; 523 } else { 524 /* XXX does this mean privacy is supported or required? */ 525 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 526 fail |= 0x04; 527 } 528 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 529 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 530 if (rate & IEEE80211_RATE_BASIC) 531 fail |= 0x08; 532 if (vap->iv_des_nssid != 0 && 533 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 534 fail |= 0x10; 535 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 536 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 537 fail |= 0x20; 538 539 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 540 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 541 printf(" %3d%c", 542 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 543 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 544 fail & 0x08 ? '!' : ' '); 545 printf(" %4s%c", 546 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 547 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 548 "????", 549 fail & 0x02 ? '!' : ' '); 550 printf(" %3s%c ", 551 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 552 fail & 0x04 ? '!' : ' '); 553 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 554 printf("%s\n", fail & 0x10 ? "!" : ""); 555} 556#endif /* IEEE80211_DEBUG */ 557 558/* 559 * Handle 802.11 ad hoc network merge. The 560 * convention, set by the Wireless Ethernet Compatibility Alliance 561 * (WECA), is that an 802.11 station will change its BSSID to match 562 * the "oldest" 802.11 ad hoc network, on the same channel, that 563 * has the station's desired SSID. The "oldest" 802.11 network 564 * sends beacons with the greatest TSF timestamp. 565 * 566 * The caller is assumed to validate TSF's before attempting a merge. 567 * 568 * Return !0 if the BSSID changed, 0 otherwise. 569 */ 570int 571ieee80211_ibss_merge(struct ieee80211_node *ni) 572{ 573 struct ieee80211vap *vap = ni->ni_vap; 574#ifdef IEEE80211_DEBUG 575 struct ieee80211com *ic = ni->ni_ic; 576#endif 577 578 if (ni == vap->iv_bss || 579 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 580 /* unchanged, nothing to do */ 581 return 0; 582 } 583 if (!check_bss(vap, ni)) { 584 /* capabilities mismatch */ 585 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 586 "%s: merge failed, capabilities mismatch\n", __func__); 587#ifdef IEEE80211_DEBUG 588 if (ieee80211_msg_assoc(vap)) 589 check_bss_debug(vap, ni); 590#endif 591 vap->iv_stats.is_ibss_capmismatch++; 592 return 0; 593 } 594 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 595 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 596 ether_sprintf(ni->ni_bssid), 597 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 598 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 599 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 600 ); 601 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 602} 603 604/* 605 * Calculate HT channel promotion flags for all vaps. 606 * This assumes ni_chan have been setup for each vap. 607 */ 608static int 609gethtadjustflags(struct ieee80211com *ic) 610{ 611 struct ieee80211vap *vap; 612 int flags; 613 614 flags = 0; 615 /* XXX locking */ 616 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 617 if (vap->iv_state < IEEE80211_S_RUN) 618 continue; 619 switch (vap->iv_opmode) { 620 case IEEE80211_M_WDS: 621 case IEEE80211_M_STA: 622 case IEEE80211_M_AHDEMO: 623 case IEEE80211_M_HOSTAP: 624 case IEEE80211_M_IBSS: 625 case IEEE80211_M_MBSS: 626 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 627 break; 628 default: 629 break; 630 } 631 } 632 return flags; 633} 634 635/* 636 * Check if the current channel needs to change based on whether 637 * any vap's are using HT20/HT40. This is used to sync the state 638 * of ic_curchan after a channel width change on a running vap. 639 */ 640void 641ieee80211_sync_curchan(struct ieee80211com *ic) 642{ 643 struct ieee80211_channel *c; 644 645 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 646 if (c != ic->ic_curchan) { 647 ic->ic_curchan = c; 648 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 649 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 650 IEEE80211_UNLOCK(ic); 651 ic->ic_set_channel(ic); 652 ieee80211_radiotap_chan_change(ic); 653 IEEE80211_LOCK(ic); 654 } 655} 656 657/* 658 * Setup the current channel. The request channel may be 659 * promoted if other vap's are operating with HT20/HT40. 660 */ 661void 662ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 663{ 664 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 665 int flags = gethtadjustflags(ic); 666 /* 667 * Check for channel promotion required to support the 668 * set of running vap's. This assumes we are called 669 * after ni_chan is setup for each vap. 670 */ 671 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 672 if (flags > ieee80211_htchanflags(c)) 673 c = ieee80211_ht_adjust_channel(ic, c, flags); 674 } 675 ic->ic_bsschan = ic->ic_curchan = c; 676 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 677 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 678} 679 680/* 681 * Change the current channel. The channel change is guaranteed to have 682 * happened before the next state change. 683 */ 684void 685ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 686{ 687 ieee80211_setupcurchan(ic, c); 688 ieee80211_runtask(ic, &ic->ic_chan_task); 689} 690 691/* 692 * Join the specified IBSS/BSS network. The node is assumed to 693 * be passed in with a held reference. 694 */ 695static int 696ieee80211_sta_join1(struct ieee80211_node *selbs) 697{ 698 struct ieee80211vap *vap = selbs->ni_vap; 699 struct ieee80211com *ic = selbs->ni_ic; 700 struct ieee80211_node *obss; 701 int canreassoc; 702 703 /* 704 * Committed to selbs, setup state. 705 */ 706 obss = vap->iv_bss; 707 /* 708 * Check if old+new node have the same address in which 709 * case we can reassociate when operating in sta mode. 710 */ 711 canreassoc = (obss != NULL && 712 vap->iv_state == IEEE80211_S_RUN && 713 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 714 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 715 if (obss != NULL) { 716 copy_bss(selbs, obss); 717 ieee80211_node_decref(obss); /* iv_bss reference */ 718 ieee80211_free_node(obss); /* station table reference */ 719 obss = NULL; /* NB: guard against later use */ 720 } 721 722 /* 723 * Delete unusable rates; we've already checked 724 * that the negotiated rate set is acceptable. 725 */ 726 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 727 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 728 729 ieee80211_setcurchan(ic, selbs->ni_chan); 730 /* 731 * Set the erp state (mostly the slot time) to deal with 732 * the auto-select case; this should be redundant if the 733 * mode is locked. 734 */ 735 ieee80211_reset_erp(ic); 736 ieee80211_wme_initparams(vap); 737 738 if (vap->iv_opmode == IEEE80211_M_STA) { 739 if (canreassoc) { 740 /* Reassociate */ 741 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 742 } else { 743 /* 744 * Act as if we received a DEAUTH frame in case we 745 * are invoked from the RUN state. This will cause 746 * us to try to re-authenticate if we are operating 747 * as a station. 748 */ 749 ieee80211_new_state(vap, IEEE80211_S_AUTH, 750 IEEE80211_FC0_SUBTYPE_DEAUTH); 751 } 752 } else 753 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 754 return 1; 755} 756 757int 758ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 759 const struct ieee80211_scan_entry *se) 760{ 761 struct ieee80211com *ic = vap->iv_ic; 762 struct ieee80211_node *ni; 763 764 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 765 if (ni == NULL) { 766 /* XXX msg */ 767 return 0; 768 } 769 /* 770 * Expand scan state into node's format. 771 * XXX may not need all this stuff 772 */ 773 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 774 ni->ni_esslen = se->se_ssid[1]; 775 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 776 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 777 ni->ni_intval = se->se_intval; 778 ni->ni_capinfo = se->se_capinfo; 779 ni->ni_chan = chan; 780 ni->ni_timoff = se->se_timoff; 781 ni->ni_fhdwell = se->se_fhdwell; 782 ni->ni_fhindex = se->se_fhindex; 783 ni->ni_erp = se->se_erp; 784 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 785 ni->ni_noise = se->se_noise; 786 if (vap->iv_opmode == IEEE80211_M_STA) { 787 /* NB: only infrastructure mode requires an associd */ 788 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 789 } 790 791 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 792 ieee80211_ies_expand(&ni->ni_ies); 793#ifdef IEEE80211_SUPPORT_SUPERG 794 if (ni->ni_ies.ath_ie != NULL) 795 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 796#endif 797 if (ni->ni_ies.htcap_ie != NULL) 798 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 799 if (ni->ni_ies.htinfo_ie != NULL) 800 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 801#ifdef IEEE80211_SUPPORT_MESH 802 if (ni->ni_ies.meshid_ie != NULL) 803 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 804#endif 805#ifdef IEEE80211_SUPPORT_TDMA 806 if (ni->ni_ies.tdma_ie != NULL) 807 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 808#endif 809 } 810 811 vap->iv_dtim_period = se->se_dtimperiod; 812 vap->iv_dtim_count = 0; 813 814 /* NB: must be after ni_chan is setup */ 815 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 816 IEEE80211_F_DOSORT); 817 if (ieee80211_iserp_rateset(&ni->ni_rates)) 818 ni->ni_flags |= IEEE80211_NODE_ERP; 819 ieee80211_node_setuptxparms(ni); 820 ieee80211_ratectl_node_init(ni); 821 822 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 823} 824 825/* 826 * Leave the specified IBSS/BSS network. The node is assumed to 827 * be passed in with a held reference. 828 */ 829void 830ieee80211_sta_leave(struct ieee80211_node *ni) 831{ 832 struct ieee80211com *ic = ni->ni_ic; 833 834 ic->ic_node_cleanup(ni); 835 ieee80211_notify_node_leave(ni); 836} 837 838/* 839 * Send a deauthenticate frame and drop the station. 840 */ 841void 842ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 843{ 844 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 845 ieee80211_ref_node(ni); 846 if (ni->ni_associd != 0) 847 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 848 ieee80211_node_leave(ni); 849 ieee80211_free_node(ni); 850} 851 852static struct ieee80211_node * 853node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 854{ 855 struct ieee80211_node *ni; 856 857 ni = (struct ieee80211_node *) malloc(sizeof(struct ieee80211_node), 858 M_80211_NODE, M_NOWAIT | M_ZERO); 859 return ni; 860} 861 862/* 863 * Initialize an ie blob with the specified data. If previous 864 * data exists re-use the data block. As a side effect we clear 865 * all references to specific ie's; the caller is required to 866 * recalculate them. 867 */ 868int 869ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 870{ 871 /* NB: assumes data+len are the last fields */ 872 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 873 if (ies->data != NULL && ies->len != len) { 874 /* data size changed */ 875 free(ies->data, M_80211_NODE_IE); 876 ies->data = NULL; 877 } 878 if (ies->data == NULL) { 879 ies->data = (uint8_t *) malloc(len, M_80211_NODE_IE, M_NOWAIT); 880 if (ies->data == NULL) { 881 ies->len = 0; 882 /* NB: pointers have already been zero'd above */ 883 return 0; 884 } 885 } 886 memcpy(ies->data, data, len); 887 ies->len = len; 888 return 1; 889} 890 891/* 892 * Reclaim storage for an ie blob. 893 */ 894void 895ieee80211_ies_cleanup(struct ieee80211_ies *ies) 896{ 897 if (ies->data != NULL) 898 free(ies->data, M_80211_NODE_IE); 899} 900 901/* 902 * Expand an ie blob data contents and to fillin individual 903 * ie pointers. The data blob is assumed to be well-formed; 904 * we don't do any validity checking of ie lengths. 905 */ 906void 907ieee80211_ies_expand(struct ieee80211_ies *ies) 908{ 909 uint8_t *ie; 910 int ielen; 911 912 ie = ies->data; 913 ielen = ies->len; 914 while (ielen > 0) { 915 switch (ie[0]) { 916 case IEEE80211_ELEMID_VENDOR: 917 if (iswpaoui(ie)) 918 ies->wpa_ie = ie; 919 else if (iswmeoui(ie)) 920 ies->wme_ie = ie; 921#ifdef IEEE80211_SUPPORT_SUPERG 922 else if (isatherosoui(ie)) 923 ies->ath_ie = ie; 924#endif 925#ifdef IEEE80211_SUPPORT_TDMA 926 else if (istdmaoui(ie)) 927 ies->tdma_ie = ie; 928#endif 929 break; 930 case IEEE80211_ELEMID_RSN: 931 ies->rsn_ie = ie; 932 break; 933 case IEEE80211_ELEMID_HTCAP: 934 ies->htcap_ie = ie; 935 break; 936#ifdef IEEE80211_SUPPORT_MESH 937 case IEEE80211_ELEMID_MESHID: 938 ies->meshid_ie = ie; 939 break; 940#endif 941 } 942 ielen -= 2 + ie[1]; 943 ie += 2 + ie[1]; 944 } 945} 946 947/* 948 * Reclaim any resources in a node and reset any critical 949 * state. Typically nodes are free'd immediately after, 950 * but in some cases the storage may be reused so we need 951 * to insure consistent state (should probably fix that). 952 */ 953static void 954node_cleanup(struct ieee80211_node *ni) 955{ 956#define N(a) (sizeof(a)/sizeof(a[0])) 957 struct ieee80211vap *vap = ni->ni_vap; 958 struct ieee80211com *ic = ni->ni_ic; 959 int i; 960 961 /* NB: preserve ni_table */ 962 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 963 if (vap->iv_opmode != IEEE80211_M_STA) 964 vap->iv_ps_sta--; 965 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 966 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 967 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 968 } 969 /* 970 * Cleanup any HT-related state. 971 */ 972 if (ni->ni_flags & IEEE80211_NODE_HT) 973 ieee80211_ht_node_cleanup(ni); 974#ifdef IEEE80211_SUPPORT_SUPERG 975 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 976 ieee80211_ff_node_cleanup(ni); 977#endif 978#ifdef IEEE80211_SUPPORT_MESH 979 /* 980 * Cleanup any mesh-related state. 981 */ 982 if (vap->iv_opmode == IEEE80211_M_MBSS) 983 ieee80211_mesh_node_cleanup(ni); 984#endif 985 /* 986 * Clear any staging queue entries. 987 */ 988 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 989 990 /* 991 * Clear AREF flag that marks the authorization refcnt bump 992 * has happened. This is probably not needed as the node 993 * should always be removed from the table so not found but 994 * do it just in case. 995 * Likewise clear the ASSOCID flag as these flags are intended 996 * to be managed in tandem. 997 */ 998 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 999 1000 /* 1001 * Drain power save queue and, if needed, clear TIM. 1002 */ 1003 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1004 vap->iv_set_tim(ni, 0); 1005 1006 ni->ni_associd = 0; 1007 if (ni->ni_challenge != NULL) { 1008 free(ni->ni_challenge, M_80211_NODE); 1009 ni->ni_challenge = NULL; 1010 } 1011 /* 1012 * Preserve SSID, WPA, and WME ie's so the bss node is 1013 * reusable during a re-auth/re-assoc state transition. 1014 * If we remove these data they will not be recreated 1015 * because they come from a probe-response or beacon frame 1016 * which cannot be expected prior to the association-response. 1017 * This should not be an issue when operating in other modes 1018 * as stations leaving always go through a full state transition 1019 * which will rebuild this state. 1020 * 1021 * XXX does this leave us open to inheriting old state? 1022 */ 1023 for (i = 0; i < N(ni->ni_rxfrag); i++) 1024 if (ni->ni_rxfrag[i] != NULL) { 1025 m_freem(ni->ni_rxfrag[i]); 1026 ni->ni_rxfrag[i] = NULL; 1027 } 1028 /* 1029 * Must be careful here to remove any key map entry w/o a LOR. 1030 */ 1031 ieee80211_node_delucastkey(ni); 1032#undef N 1033} 1034 1035static void 1036node_free(struct ieee80211_node *ni) 1037{ 1038 struct ieee80211com *ic = ni->ni_ic; 1039 1040 ieee80211_ratectl_node_deinit(ni); 1041 ic->ic_node_cleanup(ni); 1042 ieee80211_ies_cleanup(&ni->ni_ies); 1043 ieee80211_psq_cleanup(&ni->ni_psq); 1044 free(ni, M_80211_NODE); 1045} 1046 1047static void 1048node_age(struct ieee80211_node *ni) 1049{ 1050 struct ieee80211vap *vap = ni->ni_vap; 1051 1052 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1053 1054 /* 1055 * Age frames on the power save queue. 1056 */ 1057 if (ieee80211_node_psq_age(ni) != 0 && 1058 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1059 vap->iv_set_tim(ni, 0); 1060 /* 1061 * Age out HT resources (e.g. frames on the 1062 * A-MPDU reorder queues). 1063 */ 1064 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1065 ieee80211_ht_node_age(ni); 1066} 1067 1068static int8_t 1069node_getrssi(const struct ieee80211_node *ni) 1070{ 1071 uint32_t avgrssi = ni->ni_avgrssi; 1072 int32_t rssi; 1073 1074 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1075 return 0; 1076 rssi = IEEE80211_RSSI_GET(avgrssi); 1077 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1078} 1079 1080static void 1081node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1082{ 1083 *rssi = node_getrssi(ni); 1084 *noise = ni->ni_noise; 1085} 1086 1087static void 1088node_getmimoinfo(const struct ieee80211_node *ni, 1089 struct ieee80211_mimo_info *info) 1090{ 1091 /* XXX zero data? */ 1092} 1093 1094struct ieee80211_node * 1095ieee80211_alloc_node(struct ieee80211_node_table *nt, 1096 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1097{ 1098 struct ieee80211com *ic = nt->nt_ic; 1099 struct ieee80211_node *ni; 1100 int hash; 1101 1102 ni = ic->ic_node_alloc(vap, macaddr); 1103 if (ni == NULL) { 1104 vap->iv_stats.is_rx_nodealloc++; 1105 return NULL; 1106 } 1107 1108 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1109 "%s %p<%s> in %s table\n", __func__, ni, 1110 ether_sprintf(macaddr), nt->nt_name); 1111 1112 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1113 hash = IEEE80211_NODE_HASH(ic, macaddr); 1114 ieee80211_node_initref(ni); /* mark referenced */ 1115 ni->ni_chan = IEEE80211_CHAN_ANYC; 1116 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1117 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1118 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1119 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1120 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1121 ni->ni_inact_reload = nt->nt_inact_init; 1122 ni->ni_inact = ni->ni_inact_reload; 1123 ni->ni_ath_defkeyix = 0x7fff; 1124 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1125#ifdef IEEE80211_SUPPORT_MESH 1126 if (vap->iv_opmode == IEEE80211_M_MBSS) 1127 ieee80211_mesh_node_init(vap, ni); 1128#endif 1129 IEEE80211_NODE_LOCK(nt); 1130 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1131 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1132 ni->ni_table = nt; 1133 ni->ni_vap = vap; 1134 ni->ni_ic = ic; 1135 IEEE80211_NODE_UNLOCK(nt); 1136 1137 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1138 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1139 1140 return ni; 1141} 1142 1143/* 1144 * Craft a temporary node suitable for sending a management frame 1145 * to the specified station. We craft only as much state as we 1146 * need to do the work since the node will be immediately reclaimed 1147 * once the send completes. 1148 */ 1149struct ieee80211_node * 1150ieee80211_tmp_node(struct ieee80211vap *vap, 1151 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1152{ 1153 struct ieee80211com *ic = vap->iv_ic; 1154 struct ieee80211_node *ni; 1155 1156 ni = ic->ic_node_alloc(vap, macaddr); 1157 if (ni != NULL) { 1158 struct ieee80211_node *bss = vap->iv_bss; 1159 1160 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1161 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1162 1163 ni->ni_table = NULL; /* NB: pedantic */ 1164 ni->ni_ic = ic; /* NB: needed to set channel */ 1165 ni->ni_vap = vap; 1166 1167 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1168 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1169 ieee80211_node_initref(ni); /* mark referenced */ 1170 /* NB: required by ieee80211_fix_rate */ 1171 ieee80211_node_set_chan(ni, bss->ni_chan); 1172 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1173 IEEE80211_KEYIX_NONE); 1174 ni->ni_txpower = bss->ni_txpower; 1175 /* XXX optimize away */ 1176 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1177 } else { 1178 /* XXX msg */ 1179 vap->iv_stats.is_rx_nodealloc++; 1180 } 1181 return ni; 1182} 1183 1184struct ieee80211_node * 1185ieee80211_dup_bss(struct ieee80211vap *vap, 1186 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1187{ 1188 struct ieee80211com *ic = vap->iv_ic; 1189 struct ieee80211_node *ni; 1190 1191 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1192 if (ni != NULL) { 1193 struct ieee80211_node *bss = vap->iv_bss; 1194 /* 1195 * Inherit from iv_bss. 1196 */ 1197 copy_bss(ni, bss); 1198 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1199 ieee80211_node_set_chan(ni, bss->ni_chan); 1200 } 1201 return ni; 1202} 1203 1204/* 1205 * Create a bss node for a legacy WDS vap. The far end does 1206 * not associate so we just create create a new node and 1207 * simulate an association. The caller is responsible for 1208 * installing the node as the bss node and handling any further 1209 * setup work like authorizing the port. 1210 */ 1211struct ieee80211_node * 1212ieee80211_node_create_wds(struct ieee80211vap *vap, 1213 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1214{ 1215 struct ieee80211com *ic = vap->iv_ic; 1216 struct ieee80211_node *ni; 1217 1218 /* XXX check if node already in sta table? */ 1219 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1220 if (ni != NULL) { 1221 ni->ni_wdsvap = vap; 1222 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1223 /* 1224 * Inherit any manually configured settings. 1225 */ 1226 copy_bss(ni, vap->iv_bss); 1227 ieee80211_node_set_chan(ni, chan); 1228 /* NB: propagate ssid so available to WPA supplicant */ 1229 ni->ni_esslen = vap->iv_des_ssid[0].len; 1230 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1231 /* NB: no associd for peer */ 1232 /* 1233 * There are no management frames to use to 1234 * discover neighbor capabilities, so blindly 1235 * propagate the local configuration. 1236 */ 1237 if (vap->iv_flags & IEEE80211_F_WME) 1238 ni->ni_flags |= IEEE80211_NODE_QOS; 1239#ifdef IEEE80211_SUPPORT_SUPERG 1240 if (vap->iv_flags & IEEE80211_F_FF) 1241 ni->ni_flags |= IEEE80211_NODE_FF; 1242#endif 1243 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1244 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1245 /* 1246 * Device is HT-capable and HT is enabled for 1247 * the vap; setup HT operation. On return 1248 * ni_chan will be adjusted to an HT channel. 1249 */ 1250 ieee80211_ht_wds_init(ni); 1251 } else { 1252 struct ieee80211_channel *c = ni->ni_chan; 1253 /* 1254 * Force a legacy channel to be used. 1255 */ 1256 c = ieee80211_find_channel(ic, 1257 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1258 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1259 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1260 ni->ni_chan = c; 1261 } 1262 } 1263 return ni; 1264} 1265 1266struct ieee80211_node * 1267#ifdef IEEE80211_DEBUG_REFCNT 1268ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1269 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1270#else 1271ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1272 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1273#endif 1274{ 1275 struct ieee80211_node *ni; 1276 int hash; 1277 1278 IEEE80211_NODE_LOCK_ASSERT(nt); 1279 1280 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1281 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1282 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1283 ieee80211_ref_node(ni); /* mark referenced */ 1284#ifdef IEEE80211_DEBUG_REFCNT 1285 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1286 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1287 func, line, 1288 ni, ether_sprintf(ni->ni_macaddr), 1289 ieee80211_node_refcnt(ni)); 1290#endif 1291 return ni; 1292 } 1293 } 1294 return NULL; 1295} 1296 1297struct ieee80211_node * 1298#ifdef IEEE80211_DEBUG_REFCNT 1299ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1300 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1301#else 1302ieee80211_find_node(struct ieee80211_node_table *nt, 1303 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1304#endif 1305{ 1306 struct ieee80211_node *ni; 1307 1308 IEEE80211_NODE_LOCK(nt); 1309 ni = ieee80211_find_node_locked(nt, macaddr); 1310 IEEE80211_NODE_UNLOCK(nt); 1311 return ni; 1312} 1313 1314struct ieee80211_node * 1315#ifdef IEEE80211_DEBUG_REFCNT 1316ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1317 const struct ieee80211vap *vap, 1318 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1319#else 1320ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1321 const struct ieee80211vap *vap, 1322 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1323#endif 1324{ 1325 struct ieee80211_node *ni; 1326 int hash; 1327 1328 IEEE80211_NODE_LOCK_ASSERT(nt); 1329 1330 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1331 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1332 if (ni->ni_vap == vap && 1333 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1334 ieee80211_ref_node(ni); /* mark referenced */ 1335#ifdef IEEE80211_DEBUG_REFCNT 1336 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1337 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1338 func, line, 1339 ni, ether_sprintf(ni->ni_macaddr), 1340 ieee80211_node_refcnt(ni)); 1341#endif 1342 return ni; 1343 } 1344 } 1345 return NULL; 1346} 1347 1348struct ieee80211_node * 1349#ifdef IEEE80211_DEBUG_REFCNT 1350ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1351 const struct ieee80211vap *vap, 1352 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1353#else 1354ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1355 const struct ieee80211vap *vap, 1356 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1357#endif 1358{ 1359 struct ieee80211_node *ni; 1360 1361 IEEE80211_NODE_LOCK(nt); 1362 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1363 IEEE80211_NODE_UNLOCK(nt); 1364 return ni; 1365} 1366 1367/* 1368 * Fake up a node; this handles node discovery in adhoc mode. 1369 * Note that for the driver's benefit we we treat this like 1370 * an association so the driver has an opportunity to setup 1371 * it's private state. 1372 */ 1373struct ieee80211_node * 1374ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1375 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1376{ 1377 struct ieee80211_node *ni; 1378 1379 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1380 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1381 ni = ieee80211_dup_bss(vap, macaddr); 1382 if (ni != NULL) { 1383 struct ieee80211com *ic = vap->iv_ic; 1384 1385 /* XXX no rate negotiation; just dup */ 1386 ni->ni_rates = vap->iv_bss->ni_rates; 1387 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1388 ni->ni_flags |= IEEE80211_NODE_ERP; 1389 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1390 /* 1391 * In adhoc demo mode there are no management 1392 * frames to use to discover neighbor capabilities, 1393 * so blindly propagate the local configuration 1394 * so we can do interesting things (e.g. use 1395 * WME to disable ACK's). 1396 */ 1397 if (vap->iv_flags & IEEE80211_F_WME) 1398 ni->ni_flags |= IEEE80211_NODE_QOS; 1399#ifdef IEEE80211_SUPPORT_SUPERG 1400 if (vap->iv_flags & IEEE80211_F_FF) 1401 ni->ni_flags |= IEEE80211_NODE_FF; 1402#endif 1403 } 1404 ieee80211_node_setuptxparms(ni); 1405 ieee80211_ratectl_node_init(ni); 1406 if (ic->ic_newassoc != NULL) 1407 ic->ic_newassoc(ni, 1); 1408 /* XXX not right for 802.1x/WPA */ 1409 ieee80211_node_authorize(ni); 1410 } 1411 return ni; 1412} 1413 1414void 1415ieee80211_init_neighbor(struct ieee80211_node *ni, 1416 const struct ieee80211_frame *wh, 1417 const struct ieee80211_scanparams *sp) 1418{ 1419 ni->ni_esslen = sp->ssid[1]; 1420 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1421 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1422 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1423 ni->ni_intval = sp->bintval; 1424 ni->ni_capinfo = sp->capinfo; 1425 ni->ni_chan = ni->ni_ic->ic_curchan; 1426 ni->ni_fhdwell = sp->fhdwell; 1427 ni->ni_fhindex = sp->fhindex; 1428 ni->ni_erp = sp->erp; 1429 ni->ni_timoff = sp->timoff; 1430#ifdef IEEE80211_SUPPORT_MESH 1431 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1432 ieee80211_mesh_init_neighbor(ni, wh, sp); 1433#endif 1434 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1435 ieee80211_ies_expand(&ni->ni_ies); 1436 if (ni->ni_ies.wme_ie != NULL) 1437 ni->ni_flags |= IEEE80211_NODE_QOS; 1438 else 1439 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1440#ifdef IEEE80211_SUPPORT_SUPERG 1441 if (ni->ni_ies.ath_ie != NULL) 1442 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1443#endif 1444 } 1445 1446 /* NB: must be after ni_chan is setup */ 1447 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1448 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1449 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1450} 1451 1452/* 1453 * Do node discovery in adhoc mode on receipt of a beacon 1454 * or probe response frame. Note that for the driver's 1455 * benefit we we treat this like an association so the 1456 * driver has an opportunity to setup it's private state. 1457 */ 1458struct ieee80211_node * 1459ieee80211_add_neighbor(struct ieee80211vap *vap, 1460 const struct ieee80211_frame *wh, 1461 const struct ieee80211_scanparams *sp) 1462{ 1463 struct ieee80211_node *ni; 1464 1465 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1466 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1467 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1468 if (ni != NULL) { 1469 struct ieee80211com *ic = vap->iv_ic; 1470 1471 ieee80211_init_neighbor(ni, wh, sp); 1472 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1473 ni->ni_flags |= IEEE80211_NODE_ERP; 1474 ieee80211_node_setuptxparms(ni); 1475 ieee80211_ratectl_node_init(ni); 1476 if (ic->ic_newassoc != NULL) 1477 ic->ic_newassoc(ni, 1); 1478 /* XXX not right for 802.1x/WPA */ 1479 ieee80211_node_authorize(ni); 1480 } 1481 return ni; 1482} 1483 1484#define IS_PROBEREQ(wh) \ 1485 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1486 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1487#define IS_BCAST_PROBEREQ(wh) \ 1488 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1489 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1490 1491static __inline struct ieee80211_node * 1492_find_rxnode(struct ieee80211_node_table *nt, 1493 const struct ieee80211_frame_min *wh) 1494{ 1495 if (IS_BCAST_PROBEREQ(wh)) 1496 return NULL; /* spam bcast probe req to all vap's */ 1497 return ieee80211_find_node_locked(nt, wh->i_addr2); 1498} 1499 1500/* 1501 * Locate the node for sender, track state, and then pass the 1502 * (referenced) node up to the 802.11 layer for its use. Note 1503 * we can return NULL if the sender is not in the table. 1504 */ 1505struct ieee80211_node * 1506#ifdef IEEE80211_DEBUG_REFCNT 1507ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1508 const struct ieee80211_frame_min *wh, const char *func, int line) 1509#else 1510ieee80211_find_rxnode(struct ieee80211com *ic, 1511 const struct ieee80211_frame_min *wh) 1512#endif 1513{ 1514 struct ieee80211_node_table *nt; 1515 struct ieee80211_node *ni; 1516 1517 nt = &ic->ic_sta; 1518 IEEE80211_NODE_LOCK(nt); 1519 ni = _find_rxnode(nt, wh); 1520 IEEE80211_NODE_UNLOCK(nt); 1521 1522 return ni; 1523} 1524 1525/* 1526 * Like ieee80211_find_rxnode but use the supplied h/w 1527 * key index as a hint to locate the node in the key 1528 * mapping table. If an entry is present at the key 1529 * index we return it; otherwise do a normal lookup and 1530 * update the mapping table if the station has a unicast 1531 * key assigned to it. 1532 */ 1533struct ieee80211_node * 1534#ifdef IEEE80211_DEBUG_REFCNT 1535ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1536 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1537 const char *func, int line) 1538#else 1539ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1540 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1541#endif 1542{ 1543 struct ieee80211_node_table *nt; 1544 struct ieee80211_node *ni; 1545 1546 nt = &ic->ic_sta; 1547 IEEE80211_NODE_LOCK(nt); 1548 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1549 ni = nt->nt_keyixmap[keyix]; 1550 else 1551 ni = NULL; 1552 if (ni == NULL) { 1553 ni = _find_rxnode(nt, wh); 1554 if (ni != NULL && nt->nt_keyixmap != NULL) { 1555 /* 1556 * If the station has a unicast key cache slot 1557 * assigned update the key->node mapping table. 1558 */ 1559 keyix = ni->ni_ucastkey.wk_rxkeyix; 1560 /* XXX can keyixmap[keyix] != NULL? */ 1561 if (keyix < nt->nt_keyixmax && 1562 nt->nt_keyixmap[keyix] == NULL) { 1563 IEEE80211_DPRINTF(ni->ni_vap, 1564 IEEE80211_MSG_NODE, 1565 "%s: add key map entry %p<%s> refcnt %d\n", 1566 __func__, ni, ether_sprintf(ni->ni_macaddr), 1567 ieee80211_node_refcnt(ni)+1); 1568 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1569 } 1570 } 1571 } else { 1572 if (IS_BCAST_PROBEREQ(wh)) 1573 ni = NULL; /* spam bcast probe req to all vap's */ 1574 else 1575 ieee80211_ref_node(ni); 1576 } 1577 IEEE80211_NODE_UNLOCK(nt); 1578 1579 return ni; 1580} 1581#undef IS_BCAST_PROBEREQ 1582#undef IS_PROBEREQ 1583 1584/* 1585 * Return a reference to the appropriate node for sending 1586 * a data frame. This handles node discovery in adhoc networks. 1587 */ 1588struct ieee80211_node * 1589#ifdef IEEE80211_DEBUG_REFCNT 1590ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1591 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1592 const char *func, int line) 1593#else 1594ieee80211_find_txnode(struct ieee80211vap *vap, 1595 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1596#endif 1597{ 1598 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1599 struct ieee80211_node *ni; 1600 1601 /* 1602 * The destination address should be in the node table 1603 * unless this is a multicast/broadcast frame. We can 1604 * also optimize station mode operation, all frames go 1605 * to the bss node. 1606 */ 1607 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1608 IEEE80211_NODE_LOCK(nt); 1609 if (vap->iv_opmode == IEEE80211_M_STA || 1610 vap->iv_opmode == IEEE80211_M_WDS || 1611 IEEE80211_IS_MULTICAST(macaddr)) 1612 ni = ieee80211_ref_node(vap->iv_bss); 1613 else 1614 ni = ieee80211_find_node_locked(nt, macaddr); 1615 IEEE80211_NODE_UNLOCK(nt); 1616 1617 if (ni == NULL) { 1618 if (vap->iv_opmode == IEEE80211_M_IBSS || 1619 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1620 /* 1621 * In adhoc mode cons up a node for the destination. 1622 * Note that we need an additional reference for the 1623 * caller to be consistent with 1624 * ieee80211_find_node_locked. 1625 */ 1626 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1627 if (ni != NULL) 1628 (void) ieee80211_ref_node(ni); 1629 } else { 1630 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1631 "no node, discard frame (%s)", __func__); 1632 vap->iv_stats.is_tx_nonode++; 1633 } 1634 } 1635 return ni; 1636} 1637 1638static void 1639_ieee80211_free_node(struct ieee80211_node *ni) 1640{ 1641 struct ieee80211_node_table *nt = ni->ni_table; 1642 1643 /* 1644 * NB: careful about referencing the vap as it may be 1645 * gone if the last reference was held by a driver. 1646 * We know the com will always be present so it's safe 1647 * to use ni_ic below to reclaim resources. 1648 */ 1649#if 0 1650 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1651 "%s %p<%s> in %s table\n", __func__, ni, 1652 ether_sprintf(ni->ni_macaddr), 1653 nt != NULL ? nt->nt_name : "<gone>"); 1654#endif 1655 if (ni->ni_associd != 0) { 1656 struct ieee80211vap *vap = ni->ni_vap; 1657 if (vap->iv_aid_bitmap != NULL) 1658 IEEE80211_AID_CLR(vap, ni->ni_associd); 1659 } 1660 if (nt != NULL) { 1661 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1662 LIST_REMOVE(ni, ni_hash); 1663 } 1664 ni->ni_ic->ic_node_free(ni); 1665} 1666 1667void 1668#ifdef IEEE80211_DEBUG_REFCNT 1669ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1670#else 1671ieee80211_free_node(struct ieee80211_node *ni) 1672#endif 1673{ 1674 struct ieee80211_node_table *nt = ni->ni_table; 1675 1676#ifdef IEEE80211_DEBUG_REFCNT 1677 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1678 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1679 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1680#endif 1681 if (nt != NULL) { 1682 IEEE80211_NODE_LOCK(nt); 1683 if (ieee80211_node_dectestref(ni)) { 1684 /* 1685 * Last reference, reclaim state. 1686 */ 1687 _ieee80211_free_node(ni); 1688 } else if (ieee80211_node_refcnt(ni) == 1 && 1689 nt->nt_keyixmap != NULL) { 1690 ieee80211_keyix keyix; 1691 /* 1692 * Check for a last reference in the key mapping table. 1693 */ 1694 keyix = ni->ni_ucastkey.wk_rxkeyix; 1695 if (keyix < nt->nt_keyixmax && 1696 nt->nt_keyixmap[keyix] == ni) { 1697 IEEE80211_DPRINTF(ni->ni_vap, 1698 IEEE80211_MSG_NODE, 1699 "%s: %p<%s> clear key map entry", __func__, 1700 ni, ether_sprintf(ni->ni_macaddr)); 1701 nt->nt_keyixmap[keyix] = NULL; 1702 ieee80211_node_decref(ni); /* XXX needed? */ 1703 _ieee80211_free_node(ni); 1704 } 1705 } 1706 IEEE80211_NODE_UNLOCK(nt); 1707 } else { 1708 if (ieee80211_node_dectestref(ni)) 1709 _ieee80211_free_node(ni); 1710 } 1711} 1712 1713/* 1714 * Reclaim a unicast key and clear any key cache state. 1715 */ 1716int 1717ieee80211_node_delucastkey(struct ieee80211_node *ni) 1718{ 1719 struct ieee80211com *ic = ni->ni_ic; 1720 struct ieee80211_node_table *nt = &ic->ic_sta; 1721 struct ieee80211_node *nikey; 1722 ieee80211_keyix keyix; 1723 int isowned, status; 1724 1725 /* 1726 * NB: We must beware of LOR here; deleting the key 1727 * can cause the crypto layer to block traffic updates 1728 * which can generate a LOR against the node table lock; 1729 * grab it here and stash the key index for our use below. 1730 * 1731 * Must also beware of recursion on the node table lock. 1732 * When called from node_cleanup we may already have 1733 * the node table lock held. Unfortunately there's no 1734 * way to separate out this path so we must do this 1735 * conditionally. 1736 */ 1737 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1738 if (!isowned) 1739 IEEE80211_NODE_LOCK(nt); 1740 nikey = NULL; 1741 status = 1; /* NB: success */ 1742 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1743 keyix = ni->ni_ucastkey.wk_rxkeyix; 1744 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1745 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1746 nikey = nt->nt_keyixmap[keyix]; 1747 nt->nt_keyixmap[keyix] = NULL; 1748 } 1749 } 1750 if (!isowned) 1751 IEEE80211_NODE_UNLOCK(nt); 1752 1753 if (nikey != NULL) { 1754 KASSERT(nikey == ni, 1755 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1756 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1757 "%s: delete key map entry %p<%s> refcnt %d\n", 1758 __func__, ni, ether_sprintf(ni->ni_macaddr), 1759 ieee80211_node_refcnt(ni)-1); 1760 ieee80211_free_node(ni); 1761 } 1762 return status; 1763} 1764 1765/* 1766 * Reclaim a node. If this is the last reference count then 1767 * do the normal free work. Otherwise remove it from the node 1768 * table and mark it gone by clearing the back-reference. 1769 */ 1770static void 1771node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1772{ 1773 ieee80211_keyix keyix; 1774 1775 IEEE80211_NODE_LOCK_ASSERT(nt); 1776 1777 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1778 "%s: remove %p<%s> from %s table, refcnt %d\n", 1779 __func__, ni, ether_sprintf(ni->ni_macaddr), 1780 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1781 /* 1782 * Clear any entry in the unicast key mapping table. 1783 * We need to do it here so rx lookups don't find it 1784 * in the mapping table even if it's not in the hash 1785 * table. We cannot depend on the mapping table entry 1786 * being cleared because the node may not be free'd. 1787 */ 1788 keyix = ni->ni_ucastkey.wk_rxkeyix; 1789 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1790 nt->nt_keyixmap[keyix] == ni) { 1791 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1792 "%s: %p<%s> clear key map entry %u\n", 1793 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1794 nt->nt_keyixmap[keyix] = NULL; 1795 ieee80211_node_decref(ni); /* NB: don't need free */ 1796 } 1797 if (!ieee80211_node_dectestref(ni)) { 1798 /* 1799 * Other references are present, just remove the 1800 * node from the table so it cannot be found. When 1801 * the references are dropped storage will be 1802 * reclaimed. 1803 */ 1804 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1805 LIST_REMOVE(ni, ni_hash); 1806 ni->ni_table = NULL; /* clear reference */ 1807 } else 1808 _ieee80211_free_node(ni); 1809} 1810 1811/* 1812 * Node table support. 1813 */ 1814 1815static void 1816ieee80211_node_table_init(struct ieee80211com *ic, 1817 struct ieee80211_node_table *nt, 1818 const char *name, int inact, int keyixmax) 1819{ 1820 struct ifnet *ifp = ic->ic_ifp; 1821 1822 nt->nt_ic = ic; 1823 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1824 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1825 TAILQ_INIT(&nt->nt_node); 1826 nt->nt_name = name; 1827 nt->nt_scangen = 1; 1828 nt->nt_inact_init = inact; 1829 nt->nt_keyixmax = keyixmax; 1830 if (nt->nt_keyixmax > 0) { 1831 nt->nt_keyixmap = (struct ieee80211_node **) malloc( 1832 keyixmax * sizeof(struct ieee80211_node *), 1833 M_80211_NODE, M_NOWAIT | M_ZERO); 1834 if (nt->nt_keyixmap == NULL) 1835 if_printf(ic->ic_ifp, 1836 "Cannot allocate key index map with %u entries\n", 1837 keyixmax); 1838 } else 1839 nt->nt_keyixmap = NULL; 1840} 1841 1842static void 1843ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1844 struct ieee80211vap *match) 1845{ 1846 struct ieee80211_node *ni, *next; 1847 1848 IEEE80211_NODE_LOCK(nt); 1849 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1850 if (match != NULL && ni->ni_vap != match) 1851 continue; 1852 /* XXX can this happen? if so need's work */ 1853 if (ni->ni_associd != 0) { 1854 struct ieee80211vap *vap = ni->ni_vap; 1855 1856 if (vap->iv_auth->ia_node_leave != NULL) 1857 vap->iv_auth->ia_node_leave(ni); 1858 if (vap->iv_aid_bitmap != NULL) 1859 IEEE80211_AID_CLR(vap, ni->ni_associd); 1860 } 1861 ni->ni_wdsvap = NULL; /* clear reference */ 1862 node_reclaim(nt, ni); 1863 } 1864 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1865 /* 1866 * Make a separate pass to clear references to this vap 1867 * held by DWDS entries. They will not be matched above 1868 * because ni_vap will point to the ap vap but we still 1869 * need to clear ni_wdsvap when the WDS vap is destroyed 1870 * and/or reset. 1871 */ 1872 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1873 if (ni->ni_wdsvap == match) 1874 ni->ni_wdsvap = NULL; 1875 } 1876 IEEE80211_NODE_UNLOCK(nt); 1877} 1878 1879static void 1880ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1881{ 1882 ieee80211_node_table_reset(nt, NULL); 1883 if (nt->nt_keyixmap != NULL) { 1884#ifdef DIAGNOSTIC 1885 /* XXX verify all entries are NULL */ 1886 int i; 1887 for (i = 0; i < nt->nt_keyixmax; i++) 1888 if (nt->nt_keyixmap[i] != NULL) 1889 printf("%s: %s[%u] still active\n", __func__, 1890 nt->nt_name, i); 1891#endif 1892 free(nt->nt_keyixmap, M_80211_NODE); 1893 nt->nt_keyixmap = NULL; 1894 } 1895 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1896 IEEE80211_NODE_LOCK_DESTROY(nt); 1897} 1898 1899/* 1900 * Timeout inactive stations and do related housekeeping. 1901 * Note that we cannot hold the node lock while sending a 1902 * frame as this would lead to a LOR. Instead we use a 1903 * generation number to mark nodes that we've scanned and 1904 * drop the lock and restart a scan if we have to time out 1905 * a node. Since we are single-threaded by virtue of 1906 * controlling the inactivity timer we can be sure this will 1907 * process each node only once. 1908 */ 1909static void 1910ieee80211_timeout_stations(struct ieee80211com *ic) 1911{ 1912 struct ieee80211_node_table *nt = &ic->ic_sta; 1913 struct ieee80211vap *vap; 1914 struct ieee80211_node *ni; 1915 int gen = 0; 1916 1917 IEEE80211_NODE_ITERATE_LOCK(nt); 1918 gen = ++nt->nt_scangen; 1919restart: 1920 IEEE80211_NODE_LOCK(nt); 1921 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1922 if (ni->ni_scangen == gen) /* previously handled */ 1923 continue; 1924 ni->ni_scangen = gen; 1925 /* 1926 * Ignore entries for which have yet to receive an 1927 * authentication frame. These are transient and 1928 * will be reclaimed when the last reference to them 1929 * goes away (when frame xmits complete). 1930 */ 1931 vap = ni->ni_vap; 1932 /* 1933 * Only process stations when in RUN state. This 1934 * insures, for example, that we don't timeout an 1935 * inactive station during CAC. Note that CSA state 1936 * is actually handled in ieee80211_node_timeout as 1937 * it applies to more than timeout processing. 1938 */ 1939 if (vap->iv_state != IEEE80211_S_RUN) 1940 continue; 1941 /* XXX can vap be NULL? */ 1942 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1943 vap->iv_opmode == IEEE80211_M_STA) && 1944 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1945 continue; 1946 /* 1947 * Free fragment if not needed anymore 1948 * (last fragment older than 1s). 1949 * XXX doesn't belong here, move to node_age 1950 */ 1951 if (ni->ni_rxfrag[0] != NULL && 1952 ticks > ni->ni_rxfragstamp + hz) { 1953 m_freem(ni->ni_rxfrag[0]); 1954 ni->ni_rxfrag[0] = NULL; 1955 } 1956 if (ni->ni_inact > 0) { 1957 ni->ni_inact--; 1958 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1959 "%s: inact %u inact_reload %u nrates %u", 1960 __func__, ni->ni_inact, ni->ni_inact_reload, 1961 ni->ni_rates.rs_nrates); 1962 } 1963 /* 1964 * Special case ourself; we may be idle for extended periods 1965 * of time and regardless reclaiming our state is wrong. 1966 * XXX run ic_node_age 1967 */ 1968 if (ni == vap->iv_bss) 1969 continue; 1970 if (ni->ni_associd != 0 || 1971 (vap->iv_opmode == IEEE80211_M_IBSS || 1972 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1973 /* 1974 * Age/drain resources held by the station. 1975 */ 1976 ic->ic_node_age(ni); 1977 /* 1978 * Probe the station before time it out. We 1979 * send a null data frame which may not be 1980 * universally supported by drivers (need it 1981 * for ps-poll support so it should be...). 1982 * 1983 * XXX don't probe the station unless we've 1984 * received a frame from them (and have 1985 * some idea of the rates they are capable 1986 * of); this will get fixed more properly 1987 * soon with better handling of the rate set. 1988 */ 1989 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1990 (0 < ni->ni_inact && 1991 ni->ni_inact <= vap->iv_inact_probe) && 1992 ni->ni_rates.rs_nrates != 0) { 1993 IEEE80211_NOTE(vap, 1994 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1995 ni, "%s", 1996 "probe station due to inactivity"); 1997 /* 1998 * Grab a reference before unlocking the table 1999 * so the node cannot be reclaimed before we 2000 * send the frame. ieee80211_send_nulldata 2001 * understands we've done this and reclaims the 2002 * ref for us as needed. 2003 */ 2004 ieee80211_ref_node(ni); 2005 IEEE80211_NODE_UNLOCK(nt); 2006 ieee80211_send_nulldata(ni); 2007 /* XXX stat? */ 2008 goto restart; 2009 } 2010 } 2011 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2012 ni->ni_inact <= 0) { 2013 IEEE80211_NOTE(vap, 2014 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2015 "station timed out due to inactivity " 2016 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2017 /* 2018 * Send a deauthenticate frame and drop the station. 2019 * This is somewhat complicated due to reference counts 2020 * and locking. At this point a station will typically 2021 * have a reference count of 1. ieee80211_node_leave 2022 * will do a "free" of the node which will drop the 2023 * reference count. But in the meantime a reference 2024 * wil be held by the deauth frame. The actual reclaim 2025 * of the node will happen either after the tx is 2026 * completed or by ieee80211_node_leave. 2027 * 2028 * Separately we must drop the node lock before sending 2029 * in case the driver takes a lock, as this can result 2030 * in a LOR between the node lock and the driver lock. 2031 */ 2032 ieee80211_ref_node(ni); 2033 IEEE80211_NODE_UNLOCK(nt); 2034 if (ni->ni_associd != 0) { 2035 IEEE80211_SEND_MGMT(ni, 2036 IEEE80211_FC0_SUBTYPE_DEAUTH, 2037 IEEE80211_REASON_AUTH_EXPIRE); 2038 } 2039 ieee80211_node_leave(ni); 2040 ieee80211_free_node(ni); 2041 vap->iv_stats.is_node_timeout++; 2042 goto restart; 2043 } 2044 } 2045 IEEE80211_NODE_UNLOCK(nt); 2046 2047 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2048} 2049 2050/* 2051 * Aggressively reclaim resources. This should be used 2052 * only in a critical situation to reclaim mbuf resources. 2053 */ 2054void 2055ieee80211_drain(struct ieee80211com *ic) 2056{ 2057 struct ieee80211_node_table *nt = &ic->ic_sta; 2058 struct ieee80211vap *vap; 2059 struct ieee80211_node *ni; 2060 2061 IEEE80211_NODE_LOCK(nt); 2062 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2063 /* 2064 * Ignore entries for which have yet to receive an 2065 * authentication frame. These are transient and 2066 * will be reclaimed when the last reference to them 2067 * goes away (when frame xmits complete). 2068 */ 2069 vap = ni->ni_vap; 2070 /* 2071 * Only process stations when in RUN state. This 2072 * insures, for example, that we don't timeout an 2073 * inactive station during CAC. Note that CSA state 2074 * is actually handled in ieee80211_node_timeout as 2075 * it applies to more than timeout processing. 2076 */ 2077 if (vap->iv_state != IEEE80211_S_RUN) 2078 continue; 2079 /* XXX can vap be NULL? */ 2080 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2081 vap->iv_opmode == IEEE80211_M_STA) && 2082 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2083 continue; 2084 /* 2085 * Free fragments. 2086 * XXX doesn't belong here, move to node_drain 2087 */ 2088 if (ni->ni_rxfrag[0] != NULL) { 2089 m_freem(ni->ni_rxfrag[0]); 2090 ni->ni_rxfrag[0] = NULL; 2091 } 2092 /* 2093 * Drain resources held by the station. 2094 */ 2095 ic->ic_node_drain(ni); 2096 } 2097 IEEE80211_NODE_UNLOCK(nt); 2098} 2099 2100/* 2101 * Per-ieee80211com inactivity timer callback. 2102 */ 2103void 2104ieee80211_node_timeout(void *arg) 2105{ 2106 struct ieee80211com *ic = arg; 2107 2108 /* 2109 * Defer timeout processing if a channel switch is pending. 2110 * We typically need to be mute so not doing things that 2111 * might generate frames is good to handle in one place. 2112 * Supressing the station timeout processing may extend the 2113 * lifetime of inactive stations (by not decrementing their 2114 * idle counters) but this should be ok unless the CSA is 2115 * active for an unusually long time. 2116 */ 2117 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2118 ieee80211_scan_timeout(ic); 2119 ieee80211_timeout_stations(ic); 2120 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2121 2122 IEEE80211_LOCK(ic); 2123 ieee80211_erp_timeout(ic); 2124 ieee80211_ht_timeout(ic); 2125 IEEE80211_UNLOCK(ic); 2126 } 2127 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2128 ieee80211_node_timeout, ic); 2129} 2130 2131void 2132ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2133 ieee80211_iter_func *f, void *arg) 2134{ 2135 struct ieee80211_node *ni; 2136 u_int gen; 2137 2138 IEEE80211_NODE_ITERATE_LOCK(nt); 2139 gen = ++nt->nt_scangen; 2140restart: 2141 IEEE80211_NODE_LOCK(nt); 2142 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2143 if (ni->ni_scangen != gen) { 2144 ni->ni_scangen = gen; 2145 (void) ieee80211_ref_node(ni); 2146 IEEE80211_NODE_UNLOCK(nt); 2147 (*f)(arg, ni); 2148 ieee80211_free_node(ni); 2149 goto restart; 2150 } 2151 } 2152 IEEE80211_NODE_UNLOCK(nt); 2153 2154 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2155} 2156 2157void 2158ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2159{ 2160 printf("0x%p: mac %s refcnt %d\n", ni, 2161 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2162 printf("\tscangen %u authmode %u flags 0x%x\n", 2163 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2164 printf("\tassocid 0x%x txpower %u vlan %u\n", 2165 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2166 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2167 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2168 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2169 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2170 ni->ni_rxfragstamp); 2171 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2172 node_getrssi(ni), ni->ni_noise, 2173 ni->ni_intval, ni->ni_capinfo); 2174 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2175 ether_sprintf(ni->ni_bssid), 2176 ni->ni_esslen, ni->ni_essid, 2177 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2178 printf("\tinact %u inact_reload %u txrate %u\n", 2179 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2180 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2181 ni->ni_htcap, ni->ni_htparam, 2182 ni->ni_htctlchan, ni->ni_ht2ndchan); 2183 printf("\thtopmode %x htstbc %x chw %u\n", 2184 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2185} 2186 2187void 2188ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2189{ 2190 ieee80211_iterate_nodes(nt, 2191 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2192} 2193 2194static void 2195ieee80211_notify_erp_locked(struct ieee80211com *ic) 2196{ 2197 struct ieee80211vap *vap; 2198 2199 IEEE80211_LOCK_ASSERT(ic); 2200 2201 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2202 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2203 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2204} 2205 2206void 2207ieee80211_notify_erp(struct ieee80211com *ic) 2208{ 2209 IEEE80211_LOCK(ic); 2210 ieee80211_notify_erp_locked(ic); 2211 IEEE80211_UNLOCK(ic); 2212} 2213 2214/* 2215 * Handle a station joining an 11g network. 2216 */ 2217static void 2218ieee80211_node_join_11g(struct ieee80211_node *ni) 2219{ 2220 struct ieee80211com *ic = ni->ni_ic; 2221 2222 IEEE80211_LOCK_ASSERT(ic); 2223 2224 /* 2225 * Station isn't capable of short slot time. Bump 2226 * the count of long slot time stations and disable 2227 * use of short slot time. Note that the actual switch 2228 * over to long slot time use may not occur until the 2229 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2230 */ 2231 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2232 ic->ic_longslotsta++; 2233 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2234 "station needs long slot time, count %d", 2235 ic->ic_longslotsta); 2236 /* XXX vap's w/ conflicting needs won't work */ 2237 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2238 /* 2239 * Don't force slot time when switched to turbo 2240 * mode as non-ERP stations won't be present; this 2241 * need only be done when on the normal G channel. 2242 */ 2243 ieee80211_set_shortslottime(ic, 0); 2244 } 2245 } 2246 /* 2247 * If the new station is not an ERP station 2248 * then bump the counter and enable protection 2249 * if configured. 2250 */ 2251 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2252 ic->ic_nonerpsta++; 2253 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2254 "station is !ERP, %d non-ERP stations associated", 2255 ic->ic_nonerpsta); 2256 /* 2257 * If station does not support short preamble 2258 * then we must enable use of Barker preamble. 2259 */ 2260 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2261 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2262 "%s", "station needs long preamble"); 2263 ic->ic_flags |= IEEE80211_F_USEBARKER; 2264 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2265 } 2266 /* 2267 * If protection is configured and this is the first 2268 * indication we should use protection, enable it. 2269 */ 2270 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2271 ic->ic_nonerpsta == 1 && 2272 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2273 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2274 "%s: enable use of protection\n", __func__); 2275 ic->ic_flags |= IEEE80211_F_USEPROT; 2276 ieee80211_notify_erp_locked(ic); 2277 } 2278 } else 2279 ni->ni_flags |= IEEE80211_NODE_ERP; 2280} 2281 2282void 2283ieee80211_node_join(struct ieee80211_node *ni, int resp) 2284{ 2285 struct ieee80211com *ic = ni->ni_ic; 2286 struct ieee80211vap *vap = ni->ni_vap; 2287 int newassoc; 2288 2289 if (ni->ni_associd == 0) { 2290 uint16_t aid; 2291 2292 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2293 /* 2294 * It would be good to search the bitmap 2295 * more efficiently, but this will do for now. 2296 */ 2297 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2298 if (!IEEE80211_AID_ISSET(vap, aid)) 2299 break; 2300 } 2301 if (aid >= vap->iv_max_aid) { 2302 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2303 ieee80211_node_leave(ni); 2304 return; 2305 } 2306 ni->ni_associd = aid | 0xc000; 2307 ni->ni_jointime = time_uptime; 2308 IEEE80211_LOCK(ic); 2309 IEEE80211_AID_SET(vap, ni->ni_associd); 2310 vap->iv_sta_assoc++; 2311 ic->ic_sta_assoc++; 2312 2313 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2314 ieee80211_ht_node_join(ni); 2315 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2316 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2317 ieee80211_node_join_11g(ni); 2318 IEEE80211_UNLOCK(ic); 2319 2320 newassoc = 1; 2321 } else 2322 newassoc = 0; 2323 2324 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2325 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2326 IEEE80211_NODE_AID(ni), 2327 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2328 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2329 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2330 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2331 ni->ni_flags & IEEE80211_NODE_HT ? 2332 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2333 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2334 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2335 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2336 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2337 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2338 ", fast-frames" : "", 2339 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2340 ", turbo" : "" 2341 ); 2342 2343 ieee80211_node_setuptxparms(ni); 2344 ieee80211_ratectl_node_init(ni); 2345 /* give driver a chance to setup state like ni_txrate */ 2346 if (ic->ic_newassoc != NULL) 2347 ic->ic_newassoc(ni, newassoc); 2348 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2349 /* tell the authenticator about new station */ 2350 if (vap->iv_auth->ia_node_join != NULL) 2351 vap->iv_auth->ia_node_join(ni); 2352 ieee80211_notify_node_join(ni, 2353 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2354} 2355 2356static void 2357disable_protection(struct ieee80211com *ic) 2358{ 2359 KASSERT(ic->ic_nonerpsta == 0 && 2360 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2361 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2362 ic->ic_flags_ext)); 2363 2364 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2365 /* XXX verify mode? */ 2366 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2367 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2368 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2369 } 2370 ieee80211_notify_erp_locked(ic); 2371} 2372 2373/* 2374 * Handle a station leaving an 11g network. 2375 */ 2376static void 2377ieee80211_node_leave_11g(struct ieee80211_node *ni) 2378{ 2379 struct ieee80211com *ic = ni->ni_ic; 2380 2381 IEEE80211_LOCK_ASSERT(ic); 2382 2383 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2384 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2385 ic->ic_bsschan->ic_flags)); 2386 2387 /* 2388 * If a long slot station do the slot time bookkeeping. 2389 */ 2390 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2391 KASSERT(ic->ic_longslotsta > 0, 2392 ("bogus long slot station count %d", ic->ic_longslotsta)); 2393 ic->ic_longslotsta--; 2394 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2395 "long slot time station leaves, count now %d", 2396 ic->ic_longslotsta); 2397 if (ic->ic_longslotsta == 0) { 2398 /* 2399 * Re-enable use of short slot time if supported 2400 * and not operating in IBSS mode (per spec). 2401 */ 2402 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2403 ic->ic_opmode != IEEE80211_M_IBSS) { 2404 IEEE80211_DPRINTF(ni->ni_vap, 2405 IEEE80211_MSG_ASSOC, 2406 "%s: re-enable use of short slot time\n", 2407 __func__); 2408 ieee80211_set_shortslottime(ic, 1); 2409 } 2410 } 2411 } 2412 /* 2413 * If a non-ERP station do the protection-related bookkeeping. 2414 */ 2415 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2416 KASSERT(ic->ic_nonerpsta > 0, 2417 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2418 ic->ic_nonerpsta--; 2419 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2420 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2421 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2422 " (non-ERP sta present)" : ""); 2423 if (ic->ic_nonerpsta == 0 && 2424 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2425 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2426 "%s: disable use of protection\n", __func__); 2427 disable_protection(ic); 2428 } 2429 } 2430} 2431 2432/* 2433 * Time out presence of an overlapping bss with non-ERP 2434 * stations. When operating in hostap mode we listen for 2435 * beacons from other stations and if we identify a non-ERP 2436 * station is present we enable protection. To identify 2437 * when all non-ERP stations are gone we time out this 2438 * condition. 2439 */ 2440static void 2441ieee80211_erp_timeout(struct ieee80211com *ic) 2442{ 2443 2444 IEEE80211_LOCK_ASSERT(ic); 2445 2446 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2447 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2448#if 0 2449 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2450 "%s", "age out non-ERP sta present on channel"); 2451#endif 2452 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2453 if (ic->ic_nonerpsta == 0) 2454 disable_protection(ic); 2455 } 2456} 2457 2458/* 2459 * Handle bookkeeping for station deauthentication/disassociation 2460 * when operating as an ap. 2461 */ 2462void 2463ieee80211_node_leave(struct ieee80211_node *ni) 2464{ 2465 struct ieee80211com *ic = ni->ni_ic; 2466 struct ieee80211vap *vap = ni->ni_vap; 2467 struct ieee80211_node_table *nt = ni->ni_table; 2468 2469 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2470 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2471 2472 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2473 ("unexpected operating mode %u", vap->iv_opmode)); 2474 /* 2475 * If node wasn't previously associated all 2476 * we need to do is reclaim the reference. 2477 */ 2478 /* XXX ibss mode bypasses 11g and notification */ 2479 if (ni->ni_associd == 0) 2480 goto done; 2481 /* 2482 * Tell the authenticator the station is leaving. 2483 * Note that we must do this before yanking the 2484 * association id as the authenticator uses the 2485 * associd to locate it's state block. 2486 */ 2487 if (vap->iv_auth->ia_node_leave != NULL) 2488 vap->iv_auth->ia_node_leave(ni); 2489 2490 IEEE80211_LOCK(ic); 2491 IEEE80211_AID_CLR(vap, ni->ni_associd); 2492 ni->ni_associd = 0; 2493 vap->iv_sta_assoc--; 2494 ic->ic_sta_assoc--; 2495 2496 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2497 ieee80211_ht_node_leave(ni); 2498 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2499 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2500 ieee80211_node_leave_11g(ni); 2501 IEEE80211_UNLOCK(ic); 2502 /* 2503 * Cleanup station state. In particular clear various 2504 * state that might otherwise be reused if the node 2505 * is reused before the reference count goes to zero 2506 * (and memory is reclaimed). 2507 */ 2508 ieee80211_sta_leave(ni); 2509done: 2510 /* 2511 * Remove the node from any table it's recorded in and 2512 * drop the caller's reference. Removal from the table 2513 * is important to insure the node is not reprocessed 2514 * for inactivity. 2515 */ 2516 if (nt != NULL) { 2517 IEEE80211_NODE_LOCK(nt); 2518 node_reclaim(nt, ni); 2519 IEEE80211_NODE_UNLOCK(nt); 2520 } else 2521 ieee80211_free_node(ni); 2522} 2523 2524struct rssiinfo { 2525 struct ieee80211vap *vap; 2526 int rssi_samples; 2527 uint32_t rssi_total; 2528}; 2529 2530static void 2531get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2532{ 2533 struct rssiinfo *info = arg; 2534 struct ieee80211vap *vap = ni->ni_vap; 2535 int8_t rssi; 2536 2537 if (info->vap != vap) 2538 return; 2539 /* only associated stations */ 2540 if (ni->ni_associd == 0) 2541 return; 2542 rssi = vap->iv_ic->ic_node_getrssi(ni); 2543 if (rssi != 0) { 2544 info->rssi_samples++; 2545 info->rssi_total += rssi; 2546 } 2547} 2548 2549static void 2550get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2551{ 2552 struct rssiinfo *info = arg; 2553 struct ieee80211vap *vap = ni->ni_vap; 2554 int8_t rssi; 2555 2556 if (info->vap != vap) 2557 return; 2558 /* only neighbors */ 2559 /* XXX check bssid */ 2560 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2561 return; 2562 rssi = vap->iv_ic->ic_node_getrssi(ni); 2563 if (rssi != 0) { 2564 info->rssi_samples++; 2565 info->rssi_total += rssi; 2566 } 2567} 2568 2569#ifdef IEEE80211_SUPPORT_MESH 2570static void 2571get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2572{ 2573 struct rssiinfo *info = arg; 2574 struct ieee80211vap *vap = ni->ni_vap; 2575 int8_t rssi; 2576 2577 if (info->vap != vap) 2578 return; 2579 /* only neighbors that peered successfully */ 2580 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2581 return; 2582 rssi = vap->iv_ic->ic_node_getrssi(ni); 2583 if (rssi != 0) { 2584 info->rssi_samples++; 2585 info->rssi_total += rssi; 2586 } 2587} 2588#endif /* IEEE80211_SUPPORT_MESH */ 2589 2590int8_t 2591ieee80211_getrssi(struct ieee80211vap *vap) 2592{ 2593#define NZ(x) ((x) == 0 ? 1 : (x)) 2594 struct ieee80211com *ic = vap->iv_ic; 2595 struct rssiinfo info; 2596 2597 info.rssi_total = 0; 2598 info.rssi_samples = 0; 2599 info.vap = vap; 2600 switch (vap->iv_opmode) { 2601 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2602 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2603 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2604 break; 2605 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2606 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2607 break; 2608#ifdef IEEE80211_SUPPORT_MESH 2609 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2610 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2611 break; 2612#endif 2613 case IEEE80211_M_MONITOR: /* XXX */ 2614 case IEEE80211_M_STA: /* use stats from associated ap */ 2615 default: 2616 if (vap->iv_bss != NULL) 2617 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2618 info.rssi_samples = 1; 2619 break; 2620 } 2621 return info.rssi_total / NZ(info.rssi_samples); 2622#undef NZ 2623} 2624 2625void 2626ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2627{ 2628 2629 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2630 return; 2631 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2632 /* for non-station mode return avg'd rssi accounting */ 2633 if (vap->iv_opmode != IEEE80211_M_STA) 2634 *rssi = ieee80211_getrssi(vap); 2635} 2636