ieee80211_node.c revision 297603
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_node.c 297603 2016-04-06 01:21:51Z adrian $"); 29 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 57#include <net/bpf.h> 58 59/* 60 * IEEE80211_NODE_HASHSIZE must be a power of 2. 61 */ 62CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 63 64/* 65 * Association id's are managed with a bit vector. 66 */ 67#define IEEE80211_AID_SET(_vap, b) \ 68 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 69 (1 << (IEEE80211_AID(b) % 32))) 70#define IEEE80211_AID_CLR(_vap, b) \ 71 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 72 ~(1 << (IEEE80211_AID(b) % 32))) 73#define IEEE80211_AID_ISSET(_vap, b) \ 74 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 75 76#ifdef IEEE80211_DEBUG_REFCNT 77#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 78#else 79#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 80#endif 81 82static int ieee80211_sta_join1(struct ieee80211_node *); 83 84static struct ieee80211_node *node_alloc(struct ieee80211vap *, 85 const uint8_t [IEEE80211_ADDR_LEN]); 86static void node_cleanup(struct ieee80211_node *); 87static void node_free(struct ieee80211_node *); 88static void node_age(struct ieee80211_node *); 89static int8_t node_getrssi(const struct ieee80211_node *); 90static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 91static void node_getmimoinfo(const struct ieee80211_node *, 92 struct ieee80211_mimo_info *); 93 94static void _ieee80211_free_node(struct ieee80211_node *); 95 96static void node_reclaim(struct ieee80211_node_table *nt, 97 struct ieee80211_node *ni); 98static void ieee80211_node_table_init(struct ieee80211com *ic, 99 struct ieee80211_node_table *nt, const char *name, 100 int inact, int keymaxix); 101static void ieee80211_node_table_reset(struct ieee80211_node_table *, 102 struct ieee80211vap *); 103static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 104static void ieee80211_erp_timeout(struct ieee80211com *); 105 106MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 107MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 108 109void 110ieee80211_node_attach(struct ieee80211com *ic) 111{ 112 /* XXX really want maxlen enforced per-sta */ 113 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 114 "802.11 staging q"); 115 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 116 IEEE80211_INACT_INIT, ic->ic_max_keyix); 117 callout_init(&ic->ic_inact, 1); 118 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 119 ieee80211_node_timeout, ic); 120 121 ic->ic_node_alloc = node_alloc; 122 ic->ic_node_free = node_free; 123 ic->ic_node_cleanup = node_cleanup; 124 ic->ic_node_age = node_age; 125 ic->ic_node_drain = node_age; /* NB: same as age */ 126 ic->ic_node_getrssi = node_getrssi; 127 ic->ic_node_getsignal = node_getsignal; 128 ic->ic_node_getmimoinfo = node_getmimoinfo; 129 130 /* 131 * Set flags to be propagated to all vap's; 132 * these define default behaviour/configuration. 133 */ 134 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 135} 136 137void 138ieee80211_node_detach(struct ieee80211com *ic) 139{ 140 141 callout_drain(&ic->ic_inact); 142 ieee80211_node_table_cleanup(&ic->ic_sta); 143 ieee80211_ageq_cleanup(&ic->ic_stageq); 144} 145 146void 147ieee80211_node_vattach(struct ieee80211vap *vap) 148{ 149 /* NB: driver can override */ 150 vap->iv_max_aid = IEEE80211_AID_DEF; 151 152 /* default station inactivity timer setings */ 153 vap->iv_inact_init = IEEE80211_INACT_INIT; 154 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 155 vap->iv_inact_run = IEEE80211_INACT_RUN; 156 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 157 158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 159 "%s: init %u auth %u run %u probe %u\n", __func__, 160 vap->iv_inact_init, vap->iv_inact_auth, 161 vap->iv_inact_run, vap->iv_inact_probe); 162} 163 164void 165ieee80211_node_latevattach(struct ieee80211vap *vap) 166{ 167 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 168 /* XXX should we allow max aid to be zero? */ 169 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 170 vap->iv_max_aid = IEEE80211_AID_MIN; 171 if_printf(vap->iv_ifp, 172 "WARNING: max aid too small, changed to %d\n", 173 vap->iv_max_aid); 174 } 175 vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( 176 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 177 M_80211_NODE, 178 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 179 if (vap->iv_aid_bitmap == NULL) { 180 /* XXX no way to recover */ 181 printf("%s: no memory for AID bitmap, max aid %d!\n", 182 __func__, vap->iv_max_aid); 183 vap->iv_max_aid = 0; 184 } 185 } 186 187 ieee80211_reset_bss(vap); 188 189 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 190} 191 192void 193ieee80211_node_vdetach(struct ieee80211vap *vap) 194{ 195 struct ieee80211com *ic = vap->iv_ic; 196 197 ieee80211_node_table_reset(&ic->ic_sta, vap); 198 if (vap->iv_bss != NULL) { 199 ieee80211_free_node(vap->iv_bss); 200 vap->iv_bss = NULL; 201 } 202 if (vap->iv_aid_bitmap != NULL) { 203 IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); 204 vap->iv_aid_bitmap = NULL; 205 } 206} 207 208/* 209 * Port authorize/unauthorize interfaces for use by an authenticator. 210 */ 211 212void 213ieee80211_node_authorize(struct ieee80211_node *ni) 214{ 215 struct ieee80211vap *vap = ni->ni_vap; 216 217 ni->ni_flags |= IEEE80211_NODE_AUTH; 218 ni->ni_inact_reload = vap->iv_inact_run; 219 ni->ni_inact = ni->ni_inact_reload; 220 221 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 222 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 223} 224 225void 226ieee80211_node_unauthorize(struct ieee80211_node *ni) 227{ 228 struct ieee80211vap *vap = ni->ni_vap; 229 230 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 231 ni->ni_inact_reload = vap->iv_inact_auth; 232 if (ni->ni_inact > ni->ni_inact_reload) 233 ni->ni_inact = ni->ni_inact_reload; 234 235 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 236 "%s: inact_reload %u inact %u", __func__, 237 ni->ni_inact_reload, ni->ni_inact); 238} 239 240/* 241 * Fix tx parameters for a node according to ``association state''. 242 */ 243void 244ieee80211_node_setuptxparms(struct ieee80211_node *ni) 245{ 246 struct ieee80211vap *vap = ni->ni_vap; 247 enum ieee80211_phymode mode; 248 249 if (ni->ni_flags & IEEE80211_NODE_HT) { 250 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 251 mode = IEEE80211_MODE_11NA; 252 else 253 mode = IEEE80211_MODE_11NG; 254 } else { /* legacy rate handling */ 255 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 256 mode = IEEE80211_MODE_STURBO_A; 257 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 258 mode = IEEE80211_MODE_HALF; 259 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 260 mode = IEEE80211_MODE_QUARTER; 261 /* NB: 108A should be handled as 11a */ 262 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 263 mode = IEEE80211_MODE_11A; 264 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 265 (ni->ni_flags & IEEE80211_NODE_ERP)) 266 mode = IEEE80211_MODE_11G; 267 else 268 mode = IEEE80211_MODE_11B; 269 } 270 ni->ni_txparms = &vap->iv_txparms[mode]; 271} 272 273/* 274 * Set/change the channel. The rate set is also updated as 275 * to insure a consistent view by drivers. 276 * XXX should be private but hostap needs it to deal with CSA 277 */ 278void 279ieee80211_node_set_chan(struct ieee80211_node *ni, 280 struct ieee80211_channel *chan) 281{ 282 struct ieee80211com *ic = ni->ni_ic; 283 struct ieee80211vap *vap = ni->ni_vap; 284 enum ieee80211_phymode mode; 285 286 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 287 288 ni->ni_chan = chan; 289 mode = ieee80211_chan2mode(chan); 290 if (IEEE80211_IS_CHAN_HT(chan)) { 291 /* 292 * We must install the legacy rate est in ni_rates and the 293 * HT rate set in ni_htrates. 294 */ 295 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 296 /* 297 * Setup bss tx parameters based on operating mode. We 298 * use legacy rates when operating in a mixed HT+non-HT bss 299 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 300 */ 301 if (mode == IEEE80211_MODE_11NA && 302 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 303 mode = IEEE80211_MODE_11A; 304 else if (mode == IEEE80211_MODE_11NG && 305 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 306 mode = IEEE80211_MODE_11G; 307 if (mode == IEEE80211_MODE_11G && 308 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 309 mode = IEEE80211_MODE_11B; 310 } 311 ni->ni_txparms = &vap->iv_txparms[mode]; 312 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 313} 314 315static __inline void 316copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 317{ 318 /* propagate useful state */ 319 nbss->ni_authmode = obss->ni_authmode; 320 nbss->ni_txpower = obss->ni_txpower; 321 nbss->ni_vlan = obss->ni_vlan; 322 /* XXX statistics? */ 323 /* XXX legacy WDS bssid? */ 324} 325 326void 327ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 328{ 329 struct ieee80211com *ic = vap->iv_ic; 330 struct ieee80211_node *ni; 331 332 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 333 "%s: creating %s on channel %u\n", __func__, 334 ieee80211_opmode_name[vap->iv_opmode], 335 ieee80211_chan2ieee(ic, chan)); 336 337 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 338 if (ni == NULL) { 339 /* XXX recovery? */ 340 return; 341 } 342 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 343 ni->ni_esslen = vap->iv_des_ssid[0].len; 344 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 345 if (vap->iv_bss != NULL) 346 copy_bss(ni, vap->iv_bss); 347 ni->ni_intval = ic->ic_bintval; 348 if (vap->iv_flags & IEEE80211_F_PRIVACY) 349 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 350 if (ic->ic_phytype == IEEE80211_T_FH) { 351 ni->ni_fhdwell = 200; /* XXX */ 352 ni->ni_fhindex = 1; 353 } 354 if (vap->iv_opmode == IEEE80211_M_IBSS) { 355 vap->iv_flags |= IEEE80211_F_SIBSS; 356 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 357 if (vap->iv_flags & IEEE80211_F_DESBSSID) 358 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 359 else { 360 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 361 /* clear group bit, add local bit */ 362 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 363 } 364 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 365 if (vap->iv_flags & IEEE80211_F_DESBSSID) 366 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 367 else 368#ifdef IEEE80211_SUPPORT_TDMA 369 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 370#endif 371 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 372#ifdef IEEE80211_SUPPORT_MESH 373 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 374 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 375 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 376#endif 377 } 378 /* 379 * Fix the channel and related attributes. 380 */ 381 /* clear DFS CAC state on previous channel */ 382 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 383 ic->ic_bsschan->ic_freq != chan->ic_freq && 384 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 385 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 386 ic->ic_bsschan = chan; 387 ieee80211_node_set_chan(ni, chan); 388 ic->ic_curmode = ieee80211_chan2mode(chan); 389 /* 390 * Do mode-specific setup. 391 */ 392 if (IEEE80211_IS_CHAN_FULL(chan)) { 393 if (IEEE80211_IS_CHAN_ANYG(chan)) { 394 /* 395 * Use a mixed 11b/11g basic rate set. 396 */ 397 ieee80211_setbasicrates(&ni->ni_rates, 398 IEEE80211_MODE_11G); 399 if (vap->iv_flags & IEEE80211_F_PUREG) { 400 /* 401 * Also mark OFDM rates basic so 11b 402 * stations do not join (WiFi compliance). 403 */ 404 ieee80211_addbasicrates(&ni->ni_rates, 405 IEEE80211_MODE_11A); 406 } 407 } else if (IEEE80211_IS_CHAN_B(chan)) { 408 /* 409 * Force pure 11b rate set. 410 */ 411 ieee80211_setbasicrates(&ni->ni_rates, 412 IEEE80211_MODE_11B); 413 } 414 } 415 416 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 417} 418 419/* 420 * Reset bss state on transition to the INIT state. 421 * Clear any stations from the table (they have been 422 * deauth'd) and reset the bss node (clears key, rate 423 * etc. state). 424 */ 425void 426ieee80211_reset_bss(struct ieee80211vap *vap) 427{ 428 struct ieee80211com *ic = vap->iv_ic; 429 struct ieee80211_node *ni, *obss; 430 431 ieee80211_node_table_reset(&ic->ic_sta, vap); 432 /* XXX multi-bss: wrong */ 433 ieee80211_reset_erp(ic); 434 435 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 436 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 437 obss = vap->iv_bss; 438 vap->iv_bss = ieee80211_ref_node(ni); 439 if (obss != NULL) { 440 copy_bss(ni, obss); 441 ni->ni_intval = ic->ic_bintval; 442 ieee80211_free_node(obss); 443 } else 444 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 445} 446 447static int 448match_ssid(const struct ieee80211_node *ni, 449 int nssid, const struct ieee80211_scan_ssid ssids[]) 450{ 451 int i; 452 453 for (i = 0; i < nssid; i++) { 454 if (ni->ni_esslen == ssids[i].len && 455 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 456 return 1; 457 } 458 return 0; 459} 460 461/* 462 * Test a node for suitability/compatibility. 463 */ 464static int 465check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 466{ 467 struct ieee80211com *ic = ni->ni_ic; 468 uint8_t rate; 469 470 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 471 return 0; 472 if (vap->iv_opmode == IEEE80211_M_IBSS) { 473 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 474 return 0; 475 } else { 476 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 477 return 0; 478 } 479 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 480 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 481 return 0; 482 } else { 483 /* XXX does this mean privacy is supported or required? */ 484 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 485 return 0; 486 } 487 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 488 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 489 if (rate & IEEE80211_RATE_BASIC) 490 return 0; 491 if (vap->iv_des_nssid != 0 && 492 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 493 return 0; 494 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 495 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 496 return 0; 497 return 1; 498} 499 500#ifdef IEEE80211_DEBUG 501/* 502 * Display node suitability/compatibility. 503 */ 504static void 505check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 506{ 507 struct ieee80211com *ic = ni->ni_ic; 508 uint8_t rate; 509 int fail; 510 511 fail = 0; 512 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 513 fail |= 0x01; 514 if (vap->iv_opmode == IEEE80211_M_IBSS) { 515 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 516 fail |= 0x02; 517 } else { 518 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 519 fail |= 0x02; 520 } 521 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 522 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 523 fail |= 0x04; 524 } else { 525 /* XXX does this mean privacy is supported or required? */ 526 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 527 fail |= 0x04; 528 } 529 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 530 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 531 if (rate & IEEE80211_RATE_BASIC) 532 fail |= 0x08; 533 if (vap->iv_des_nssid != 0 && 534 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 535 fail |= 0x10; 536 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 537 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 538 fail |= 0x20; 539 540 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 541 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 542 printf(" %3d%c", 543 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 544 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 545 fail & 0x08 ? '!' : ' '); 546 printf(" %4s%c", 547 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 548 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 549 "????", 550 fail & 0x02 ? '!' : ' '); 551 printf(" %3s%c ", 552 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 553 fail & 0x04 ? '!' : ' '); 554 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 555 printf("%s\n", fail & 0x10 ? "!" : ""); 556} 557#endif /* IEEE80211_DEBUG */ 558 559/* 560 * Handle 802.11 ad hoc network merge. The 561 * convention, set by the Wireless Ethernet Compatibility Alliance 562 * (WECA), is that an 802.11 station will change its BSSID to match 563 * the "oldest" 802.11 ad hoc network, on the same channel, that 564 * has the station's desired SSID. The "oldest" 802.11 network 565 * sends beacons with the greatest TSF timestamp. 566 * 567 * The caller is assumed to validate TSF's before attempting a merge. 568 * 569 * Return !0 if the BSSID changed, 0 otherwise. 570 */ 571int 572ieee80211_ibss_merge(struct ieee80211_node *ni) 573{ 574 struct ieee80211vap *vap = ni->ni_vap; 575#ifdef IEEE80211_DEBUG 576 struct ieee80211com *ic = ni->ni_ic; 577#endif 578 579 if (ni == vap->iv_bss || 580 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 581 /* unchanged, nothing to do */ 582 return 0; 583 } 584 if (!check_bss(vap, ni)) { 585 /* capabilities mismatch */ 586 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 587 "%s: merge failed, capabilities mismatch\n", __func__); 588#ifdef IEEE80211_DEBUG 589 if (ieee80211_msg_assoc(vap)) 590 check_bss_debug(vap, ni); 591#endif 592 vap->iv_stats.is_ibss_capmismatch++; 593 return 0; 594 } 595 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 596 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 597 ether_sprintf(ni->ni_bssid), 598 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 599 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 600 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 601 ); 602 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 603} 604 605/* 606 * Calculate HT channel promotion flags for all vaps. 607 * This assumes ni_chan have been setup for each vap. 608 */ 609static int 610gethtadjustflags(struct ieee80211com *ic) 611{ 612 struct ieee80211vap *vap; 613 int flags; 614 615 flags = 0; 616 /* XXX locking */ 617 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 618 if (vap->iv_state < IEEE80211_S_RUN) 619 continue; 620 switch (vap->iv_opmode) { 621 case IEEE80211_M_WDS: 622 case IEEE80211_M_STA: 623 case IEEE80211_M_AHDEMO: 624 case IEEE80211_M_HOSTAP: 625 case IEEE80211_M_IBSS: 626 case IEEE80211_M_MBSS: 627 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 628 break; 629 default: 630 break; 631 } 632 } 633 return flags; 634} 635 636/* 637 * Check if the current channel needs to change based on whether 638 * any vap's are using HT20/HT40. This is used to sync the state 639 * of ic_curchan after a channel width change on a running vap. 640 */ 641void 642ieee80211_sync_curchan(struct ieee80211com *ic) 643{ 644 struct ieee80211_channel *c; 645 646 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 647 if (c != ic->ic_curchan) { 648 ic->ic_curchan = c; 649 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 650 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 651 IEEE80211_UNLOCK(ic); 652 ic->ic_set_channel(ic); 653 ieee80211_radiotap_chan_change(ic); 654 IEEE80211_LOCK(ic); 655 } 656} 657 658/* 659 * Setup the current channel. The request channel may be 660 * promoted if other vap's are operating with HT20/HT40. 661 */ 662void 663ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 664{ 665 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 666 int flags = gethtadjustflags(ic); 667 /* 668 * Check for channel promotion required to support the 669 * set of running vap's. This assumes we are called 670 * after ni_chan is setup for each vap. 671 */ 672 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 673 if (flags > ieee80211_htchanflags(c)) 674 c = ieee80211_ht_adjust_channel(ic, c, flags); 675 } 676 ic->ic_bsschan = ic->ic_curchan = c; 677 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 678 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 679} 680 681/* 682 * Change the current channel. The channel change is guaranteed to have 683 * happened before the next state change. 684 */ 685void 686ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 687{ 688 ieee80211_setupcurchan(ic, c); 689 ieee80211_runtask(ic, &ic->ic_chan_task); 690} 691 692void 693ieee80211_update_chw(struct ieee80211com *ic) 694{ 695 696 ieee80211_setupcurchan(ic, ic->ic_curchan); 697 ieee80211_runtask(ic, &ic->ic_chw_task); 698} 699 700/* 701 * Join the specified IBSS/BSS network. The node is assumed to 702 * be passed in with a held reference. 703 */ 704static int 705ieee80211_sta_join1(struct ieee80211_node *selbs) 706{ 707 struct ieee80211vap *vap = selbs->ni_vap; 708 struct ieee80211com *ic = selbs->ni_ic; 709 struct ieee80211_node *obss; 710 int canreassoc; 711 712 /* 713 * Committed to selbs, setup state. 714 */ 715 obss = vap->iv_bss; 716 /* 717 * Check if old+new node have the same address in which 718 * case we can reassociate when operating in sta mode. 719 */ 720 canreassoc = (obss != NULL && 721 vap->iv_state == IEEE80211_S_RUN && 722 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 723 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 724 if (obss != NULL) { 725 struct ieee80211_node_table *nt = obss->ni_table; 726 727 copy_bss(selbs, obss); 728 ieee80211_node_decref(obss); /* iv_bss reference */ 729 730 IEEE80211_NODE_LOCK(nt); 731 node_reclaim(nt, obss); /* station table reference */ 732 IEEE80211_NODE_UNLOCK(nt); 733 734 obss = NULL; /* NB: guard against later use */ 735 } 736 737 /* 738 * Delete unusable rates; we've already checked 739 * that the negotiated rate set is acceptable. 740 */ 741 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 742 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 743 744 ieee80211_setcurchan(ic, selbs->ni_chan); 745 /* 746 * Set the erp state (mostly the slot time) to deal with 747 * the auto-select case; this should be redundant if the 748 * mode is locked. 749 */ 750 ieee80211_reset_erp(ic); 751 ieee80211_wme_initparams(vap); 752 753 if (vap->iv_opmode == IEEE80211_M_STA) { 754 if (canreassoc) { 755 /* Reassociate */ 756 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 757 } else { 758 /* 759 * Act as if we received a DEAUTH frame in case we 760 * are invoked from the RUN state. This will cause 761 * us to try to re-authenticate if we are operating 762 * as a station. 763 */ 764 ieee80211_new_state(vap, IEEE80211_S_AUTH, 765 IEEE80211_FC0_SUBTYPE_DEAUTH); 766 } 767 } else 768 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 769 return 1; 770} 771 772int 773ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 774 const struct ieee80211_scan_entry *se) 775{ 776 struct ieee80211com *ic = vap->iv_ic; 777 struct ieee80211_node *ni; 778 779 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 780 if (ni == NULL) { 781 /* XXX msg */ 782 return 0; 783 } 784 785 /* 786 * Expand scan state into node's format. 787 * XXX may not need all this stuff 788 */ 789 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 790 ni->ni_esslen = se->se_ssid[1]; 791 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 792 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 793 ni->ni_intval = se->se_intval; 794 ni->ni_capinfo = se->se_capinfo; 795 ni->ni_chan = chan; 796 ni->ni_timoff = se->se_timoff; 797 ni->ni_fhdwell = se->se_fhdwell; 798 ni->ni_fhindex = se->se_fhindex; 799 ni->ni_erp = se->se_erp; 800 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 801 ni->ni_noise = se->se_noise; 802 if (vap->iv_opmode == IEEE80211_M_STA) { 803 /* NB: only infrastructure mode requires an associd */ 804 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 805 } 806 807 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 808 ieee80211_ies_expand(&ni->ni_ies); 809#ifdef IEEE80211_SUPPORT_SUPERG 810 if (ni->ni_ies.ath_ie != NULL) 811 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 812#endif 813 if (ni->ni_ies.htcap_ie != NULL) 814 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 815 if (ni->ni_ies.htinfo_ie != NULL) 816 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 817#ifdef IEEE80211_SUPPORT_MESH 818 if (ni->ni_ies.meshid_ie != NULL) 819 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 820#endif 821#ifdef IEEE80211_SUPPORT_TDMA 822 if (ni->ni_ies.tdma_ie != NULL) 823 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 824#endif 825 } 826 827 vap->iv_dtim_period = se->se_dtimperiod; 828 vap->iv_dtim_count = 0; 829 830 /* NB: must be after ni_chan is setup */ 831 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 832 IEEE80211_F_DOSORT); 833 if (ieee80211_iserp_rateset(&ni->ni_rates)) 834 ni->ni_flags |= IEEE80211_NODE_ERP; 835 836 /* 837 * Setup HT state for this node if it's available, otherwise 838 * non-STA modes won't pick this state up. 839 * 840 * For IBSS and related modes that don't go through an 841 * association request/response, the only appropriate place 842 * to setup the HT state is here. 843 */ 844 if (ni->ni_ies.htinfo_ie != NULL && 845 ni->ni_ies.htcap_ie != NULL && 846 vap->iv_flags_ht & IEEE80211_FHT_HT) { 847 ieee80211_ht_node_init(ni); 848 ieee80211_ht_updateparams(ni, 849 ni->ni_ies.htcap_ie, 850 ni->ni_ies.htinfo_ie); 851 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 852 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 853 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 854 } 855 /* XXX else check for ath FF? */ 856 /* XXX QoS? Difficult given that WME config is specific to a master */ 857 858 ieee80211_node_setuptxparms(ni); 859 ieee80211_ratectl_node_init(ni); 860 861 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 862} 863 864/* 865 * Leave the specified IBSS/BSS network. The node is assumed to 866 * be passed in with a held reference. 867 */ 868void 869ieee80211_sta_leave(struct ieee80211_node *ni) 870{ 871 struct ieee80211com *ic = ni->ni_ic; 872 873 ic->ic_node_cleanup(ni); 874 ieee80211_notify_node_leave(ni); 875} 876 877/* 878 * Send a deauthenticate frame and drop the station. 879 */ 880void 881ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 882{ 883 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 884 ieee80211_ref_node(ni); 885 if (ni->ni_associd != 0) 886 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 887 ieee80211_node_leave(ni); 888 ieee80211_free_node(ni); 889} 890 891static struct ieee80211_node * 892node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 893{ 894 struct ieee80211_node *ni; 895 896 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 897 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 898 return ni; 899} 900 901/* 902 * Initialize an ie blob with the specified data. If previous 903 * data exists re-use the data block. As a side effect we clear 904 * all references to specific ie's; the caller is required to 905 * recalculate them. 906 */ 907int 908ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 909{ 910 /* NB: assumes data+len are the last fields */ 911 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 912 if (ies->data != NULL && ies->len != len) { 913 /* data size changed */ 914 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 915 ies->data = NULL; 916 } 917 if (ies->data == NULL) { 918 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 919 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 920 if (ies->data == NULL) { 921 ies->len = 0; 922 /* NB: pointers have already been zero'd above */ 923 return 0; 924 } 925 } 926 memcpy(ies->data, data, len); 927 ies->len = len; 928 return 1; 929} 930 931/* 932 * Reclaim storage for an ie blob. 933 */ 934void 935ieee80211_ies_cleanup(struct ieee80211_ies *ies) 936{ 937 if (ies->data != NULL) 938 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 939} 940 941/* 942 * Expand an ie blob data contents and to fillin individual 943 * ie pointers. The data blob is assumed to be well-formed; 944 * we don't do any validity checking of ie lengths. 945 */ 946void 947ieee80211_ies_expand(struct ieee80211_ies *ies) 948{ 949 uint8_t *ie; 950 int ielen; 951 952 ie = ies->data; 953 ielen = ies->len; 954 while (ielen > 0) { 955 switch (ie[0]) { 956 case IEEE80211_ELEMID_VENDOR: 957 if (iswpaoui(ie)) 958 ies->wpa_ie = ie; 959 else if (iswmeoui(ie)) 960 ies->wme_ie = ie; 961#ifdef IEEE80211_SUPPORT_SUPERG 962 else if (isatherosoui(ie)) 963 ies->ath_ie = ie; 964#endif 965#ifdef IEEE80211_SUPPORT_TDMA 966 else if (istdmaoui(ie)) 967 ies->tdma_ie = ie; 968#endif 969 break; 970 case IEEE80211_ELEMID_RSN: 971 ies->rsn_ie = ie; 972 break; 973 case IEEE80211_ELEMID_HTCAP: 974 ies->htcap_ie = ie; 975 break; 976 case IEEE80211_ELEMID_HTINFO: 977 ies->htinfo_ie = ie; 978 break; 979#ifdef IEEE80211_SUPPORT_MESH 980 case IEEE80211_ELEMID_MESHID: 981 ies->meshid_ie = ie; 982 break; 983#endif 984 } 985 ielen -= 2 + ie[1]; 986 ie += 2 + ie[1]; 987 } 988} 989 990/* 991 * Reclaim any resources in a node and reset any critical 992 * state. Typically nodes are free'd immediately after, 993 * but in some cases the storage may be reused so we need 994 * to insure consistent state (should probably fix that). 995 */ 996static void 997node_cleanup(struct ieee80211_node *ni) 998{ 999 struct ieee80211vap *vap = ni->ni_vap; 1000 struct ieee80211com *ic = ni->ni_ic; 1001 int i; 1002 1003 /* NB: preserve ni_table */ 1004 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1005 if (vap->iv_opmode != IEEE80211_M_STA) 1006 vap->iv_ps_sta--; 1007 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1008 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1009 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1010 } 1011 /* 1012 * Cleanup any HT-related state. 1013 */ 1014 if (ni->ni_flags & IEEE80211_NODE_HT) 1015 ieee80211_ht_node_cleanup(ni); 1016#ifdef IEEE80211_SUPPORT_SUPERG 1017 /* Always do FF node cleanup; for A-MSDU */ 1018 ieee80211_ff_node_cleanup(ni); 1019#endif 1020#ifdef IEEE80211_SUPPORT_MESH 1021 /* 1022 * Cleanup any mesh-related state. 1023 */ 1024 if (vap->iv_opmode == IEEE80211_M_MBSS) 1025 ieee80211_mesh_node_cleanup(ni); 1026#endif 1027 /* 1028 * Clear any staging queue entries. 1029 */ 1030 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1031 1032 /* 1033 * Clear AREF flag that marks the authorization refcnt bump 1034 * has happened. This is probably not needed as the node 1035 * should always be removed from the table so not found but 1036 * do it just in case. 1037 * Likewise clear the ASSOCID flag as these flags are intended 1038 * to be managed in tandem. 1039 */ 1040 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1041 1042 /* 1043 * Drain power save queue and, if needed, clear TIM. 1044 */ 1045 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1046 vap->iv_set_tim(ni, 0); 1047 1048 ni->ni_associd = 0; 1049 if (ni->ni_challenge != NULL) { 1050 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1051 ni->ni_challenge = NULL; 1052 } 1053 /* 1054 * Preserve SSID, WPA, and WME ie's so the bss node is 1055 * reusable during a re-auth/re-assoc state transition. 1056 * If we remove these data they will not be recreated 1057 * because they come from a probe-response or beacon frame 1058 * which cannot be expected prior to the association-response. 1059 * This should not be an issue when operating in other modes 1060 * as stations leaving always go through a full state transition 1061 * which will rebuild this state. 1062 * 1063 * XXX does this leave us open to inheriting old state? 1064 */ 1065 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1066 if (ni->ni_rxfrag[i] != NULL) { 1067 m_freem(ni->ni_rxfrag[i]); 1068 ni->ni_rxfrag[i] = NULL; 1069 } 1070 /* 1071 * Must be careful here to remove any key map entry w/o a LOR. 1072 */ 1073 ieee80211_node_delucastkey(ni); 1074} 1075 1076static void 1077node_free(struct ieee80211_node *ni) 1078{ 1079 struct ieee80211com *ic = ni->ni_ic; 1080 1081 ieee80211_ratectl_node_deinit(ni); 1082 ic->ic_node_cleanup(ni); 1083 ieee80211_ies_cleanup(&ni->ni_ies); 1084 ieee80211_psq_cleanup(&ni->ni_psq); 1085 IEEE80211_FREE(ni, M_80211_NODE); 1086} 1087 1088static void 1089node_age(struct ieee80211_node *ni) 1090{ 1091 struct ieee80211vap *vap = ni->ni_vap; 1092 1093 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1094 1095 /* 1096 * Age frames on the power save queue. 1097 */ 1098 if (ieee80211_node_psq_age(ni) != 0 && 1099 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1100 vap->iv_set_tim(ni, 0); 1101 /* 1102 * Age out HT resources (e.g. frames on the 1103 * A-MPDU reorder queues). 1104 */ 1105 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1106 ieee80211_ht_node_age(ni); 1107} 1108 1109static int8_t 1110node_getrssi(const struct ieee80211_node *ni) 1111{ 1112 uint32_t avgrssi = ni->ni_avgrssi; 1113 int32_t rssi; 1114 1115 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1116 return 0; 1117 rssi = IEEE80211_RSSI_GET(avgrssi); 1118 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1119} 1120 1121static void 1122node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1123{ 1124 *rssi = node_getrssi(ni); 1125 *noise = ni->ni_noise; 1126} 1127 1128static void 1129node_getmimoinfo(const struct ieee80211_node *ni, 1130 struct ieee80211_mimo_info *info) 1131{ 1132 int i; 1133 uint32_t avgrssi; 1134 int32_t rssi; 1135 1136 bzero(info, sizeof(*info)); 1137 1138 for (i = 0; i < ni->ni_mimo_chains; i++) { 1139 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1140 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1141 info->rssi[i] = 0; 1142 } else { 1143 rssi = IEEE80211_RSSI_GET(avgrssi); 1144 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1145 } 1146 info->noise[i] = ni->ni_mimo_noise_ctl[i]; 1147 } 1148 1149 /* XXX ext radios? */ 1150 1151 /* XXX EVM? */ 1152} 1153 1154struct ieee80211_node * 1155ieee80211_alloc_node(struct ieee80211_node_table *nt, 1156 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1157{ 1158 struct ieee80211com *ic = nt->nt_ic; 1159 struct ieee80211_node *ni; 1160 int hash; 1161 1162 ni = ic->ic_node_alloc(vap, macaddr); 1163 if (ni == NULL) { 1164 vap->iv_stats.is_rx_nodealloc++; 1165 return NULL; 1166 } 1167 1168 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1169 "%s %p<%s> in %s table\n", __func__, ni, 1170 ether_sprintf(macaddr), nt->nt_name); 1171 1172 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1173 hash = IEEE80211_NODE_HASH(ic, macaddr); 1174 ieee80211_node_initref(ni); /* mark referenced */ 1175 ni->ni_chan = IEEE80211_CHAN_ANYC; 1176 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1177 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1178 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1179 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1180 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1181 ni->ni_inact_reload = nt->nt_inact_init; 1182 ni->ni_inact = ni->ni_inact_reload; 1183 ni->ni_ath_defkeyix = 0x7fff; 1184 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1185#ifdef IEEE80211_SUPPORT_MESH 1186 if (vap->iv_opmode == IEEE80211_M_MBSS) 1187 ieee80211_mesh_node_init(vap, ni); 1188#endif 1189 IEEE80211_NODE_LOCK(nt); 1190 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1191 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1192 ni->ni_table = nt; 1193 ni->ni_vap = vap; 1194 ni->ni_ic = ic; 1195 IEEE80211_NODE_UNLOCK(nt); 1196 1197 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1198 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1199 1200 ieee80211_ratectl_node_init(ni); 1201 1202 return ni; 1203} 1204 1205/* 1206 * Craft a temporary node suitable for sending a management frame 1207 * to the specified station. We craft only as much state as we 1208 * need to do the work since the node will be immediately reclaimed 1209 * once the send completes. 1210 */ 1211struct ieee80211_node * 1212ieee80211_tmp_node(struct ieee80211vap *vap, 1213 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1214{ 1215 struct ieee80211com *ic = vap->iv_ic; 1216 struct ieee80211_node *ni; 1217 1218 ni = ic->ic_node_alloc(vap, macaddr); 1219 if (ni != NULL) { 1220 struct ieee80211_node *bss = vap->iv_bss; 1221 1222 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1223 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1224 1225 ni->ni_table = NULL; /* NB: pedantic */ 1226 ni->ni_ic = ic; /* NB: needed to set channel */ 1227 ni->ni_vap = vap; 1228 1229 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1230 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1231 ieee80211_node_initref(ni); /* mark referenced */ 1232 /* NB: required by ieee80211_fix_rate */ 1233 ieee80211_node_set_chan(ni, bss->ni_chan); 1234 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1235 IEEE80211_KEYIX_NONE); 1236 ni->ni_txpower = bss->ni_txpower; 1237 /* XXX optimize away */ 1238 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1239 1240 ieee80211_ratectl_node_init(ni); 1241 } else { 1242 /* XXX msg */ 1243 vap->iv_stats.is_rx_nodealloc++; 1244 } 1245 return ni; 1246} 1247 1248struct ieee80211_node * 1249ieee80211_dup_bss(struct ieee80211vap *vap, 1250 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1251{ 1252 struct ieee80211com *ic = vap->iv_ic; 1253 struct ieee80211_node *ni; 1254 1255 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1256 if (ni != NULL) { 1257 struct ieee80211_node *bss = vap->iv_bss; 1258 /* 1259 * Inherit from iv_bss. 1260 */ 1261 copy_bss(ni, bss); 1262 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1263 ieee80211_node_set_chan(ni, bss->ni_chan); 1264 } 1265 return ni; 1266} 1267 1268/* 1269 * Create a bss node for a legacy WDS vap. The far end does 1270 * not associate so we just create create a new node and 1271 * simulate an association. The caller is responsible for 1272 * installing the node as the bss node and handling any further 1273 * setup work like authorizing the port. 1274 */ 1275struct ieee80211_node * 1276ieee80211_node_create_wds(struct ieee80211vap *vap, 1277 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1278{ 1279 struct ieee80211com *ic = vap->iv_ic; 1280 struct ieee80211_node *ni; 1281 1282 /* XXX check if node already in sta table? */ 1283 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1284 if (ni != NULL) { 1285 ni->ni_wdsvap = vap; 1286 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1287 /* 1288 * Inherit any manually configured settings. 1289 */ 1290 copy_bss(ni, vap->iv_bss); 1291 ieee80211_node_set_chan(ni, chan); 1292 /* NB: propagate ssid so available to WPA supplicant */ 1293 ni->ni_esslen = vap->iv_des_ssid[0].len; 1294 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1295 /* NB: no associd for peer */ 1296 /* 1297 * There are no management frames to use to 1298 * discover neighbor capabilities, so blindly 1299 * propagate the local configuration. 1300 */ 1301 if (vap->iv_flags & IEEE80211_F_WME) 1302 ni->ni_flags |= IEEE80211_NODE_QOS; 1303#ifdef IEEE80211_SUPPORT_SUPERG 1304 if (vap->iv_flags & IEEE80211_F_FF) 1305 ni->ni_flags |= IEEE80211_NODE_FF; 1306#endif 1307 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1308 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1309 /* 1310 * Device is HT-capable and HT is enabled for 1311 * the vap; setup HT operation. On return 1312 * ni_chan will be adjusted to an HT channel. 1313 */ 1314 ieee80211_ht_wds_init(ni); 1315 } else { 1316 struct ieee80211_channel *c = ni->ni_chan; 1317 /* 1318 * Force a legacy channel to be used. 1319 */ 1320 c = ieee80211_find_channel(ic, 1321 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1322 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1323 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1324 ni->ni_chan = c; 1325 } 1326 } 1327 return ni; 1328} 1329 1330struct ieee80211_node * 1331#ifdef IEEE80211_DEBUG_REFCNT 1332ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1333 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1334#else 1335ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1336 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1337#endif 1338{ 1339 struct ieee80211_node *ni; 1340 int hash; 1341 1342 IEEE80211_NODE_LOCK_ASSERT(nt); 1343 1344 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1345 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1346 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1347 ieee80211_ref_node(ni); /* mark referenced */ 1348#ifdef IEEE80211_DEBUG_REFCNT 1349 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1350 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1351 func, line, 1352 ni, ether_sprintf(ni->ni_macaddr), 1353 ieee80211_node_refcnt(ni)); 1354#endif 1355 return ni; 1356 } 1357 } 1358 return NULL; 1359} 1360 1361struct ieee80211_node * 1362#ifdef IEEE80211_DEBUG_REFCNT 1363ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1364 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1365#else 1366ieee80211_find_node(struct ieee80211_node_table *nt, 1367 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1368#endif 1369{ 1370 struct ieee80211_node *ni; 1371 1372 IEEE80211_NODE_LOCK(nt); 1373 ni = ieee80211_find_node_locked(nt, macaddr); 1374 IEEE80211_NODE_UNLOCK(nt); 1375 return ni; 1376} 1377 1378struct ieee80211_node * 1379#ifdef IEEE80211_DEBUG_REFCNT 1380ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1381 const struct ieee80211vap *vap, 1382 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1383#else 1384ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1385 const struct ieee80211vap *vap, 1386 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1387#endif 1388{ 1389 struct ieee80211_node *ni; 1390 int hash; 1391 1392 IEEE80211_NODE_LOCK_ASSERT(nt); 1393 1394 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1395 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1396 if (ni->ni_vap == vap && 1397 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1398 ieee80211_ref_node(ni); /* mark referenced */ 1399#ifdef IEEE80211_DEBUG_REFCNT 1400 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1401 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1402 func, line, 1403 ni, ether_sprintf(ni->ni_macaddr), 1404 ieee80211_node_refcnt(ni)); 1405#endif 1406 return ni; 1407 } 1408 } 1409 return NULL; 1410} 1411 1412struct ieee80211_node * 1413#ifdef IEEE80211_DEBUG_REFCNT 1414ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1415 const struct ieee80211vap *vap, 1416 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1417#else 1418ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1419 const struct ieee80211vap *vap, 1420 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1421#endif 1422{ 1423 struct ieee80211_node *ni; 1424 1425 IEEE80211_NODE_LOCK(nt); 1426 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1427 IEEE80211_NODE_UNLOCK(nt); 1428 return ni; 1429} 1430 1431/* 1432 * Fake up a node; this handles node discovery in adhoc mode. 1433 * Note that for the driver's benefit we we treat this like 1434 * an association so the driver has an opportunity to setup 1435 * it's private state. 1436 */ 1437struct ieee80211_node * 1438ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1439 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1440{ 1441 struct ieee80211_node *ni; 1442 1443 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1444 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1445 ni = ieee80211_dup_bss(vap, macaddr); 1446 if (ni != NULL) { 1447 struct ieee80211com *ic = vap->iv_ic; 1448 1449 /* XXX no rate negotiation; just dup */ 1450 ni->ni_rates = vap->iv_bss->ni_rates; 1451 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1452 ni->ni_flags |= IEEE80211_NODE_ERP; 1453 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1454 /* 1455 * In adhoc demo mode there are no management 1456 * frames to use to discover neighbor capabilities, 1457 * so blindly propagate the local configuration 1458 * so we can do interesting things (e.g. use 1459 * WME to disable ACK's). 1460 */ 1461 if (vap->iv_flags & IEEE80211_F_WME) 1462 ni->ni_flags |= IEEE80211_NODE_QOS; 1463#ifdef IEEE80211_SUPPORT_SUPERG 1464 if (vap->iv_flags & IEEE80211_F_FF) 1465 ni->ni_flags |= IEEE80211_NODE_FF; 1466#endif 1467 } 1468 ieee80211_node_setuptxparms(ni); 1469 ieee80211_ratectl_node_init(ni); 1470 if (ic->ic_newassoc != NULL) 1471 ic->ic_newassoc(ni, 1); 1472 /* XXX not right for 802.1x/WPA */ 1473 ieee80211_node_authorize(ni); 1474 } 1475 return ni; 1476} 1477 1478void 1479ieee80211_init_neighbor(struct ieee80211_node *ni, 1480 const struct ieee80211_frame *wh, 1481 const struct ieee80211_scanparams *sp) 1482{ 1483 int do_ht_setup = 0; 1484 1485 ni->ni_esslen = sp->ssid[1]; 1486 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1487 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1488 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1489 ni->ni_intval = sp->bintval; 1490 ni->ni_capinfo = sp->capinfo; 1491 ni->ni_chan = ni->ni_ic->ic_curchan; 1492 ni->ni_fhdwell = sp->fhdwell; 1493 ni->ni_fhindex = sp->fhindex; 1494 ni->ni_erp = sp->erp; 1495 ni->ni_timoff = sp->timoff; 1496#ifdef IEEE80211_SUPPORT_MESH 1497 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1498 ieee80211_mesh_init_neighbor(ni, wh, sp); 1499#endif 1500 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1501 ieee80211_ies_expand(&ni->ni_ies); 1502 if (ni->ni_ies.wme_ie != NULL) 1503 ni->ni_flags |= IEEE80211_NODE_QOS; 1504 else 1505 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1506#ifdef IEEE80211_SUPPORT_SUPERG 1507 if (ni->ni_ies.ath_ie != NULL) 1508 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1509#endif 1510 if (ni->ni_ies.htcap_ie != NULL) 1511 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1512 if (ni->ni_ies.htinfo_ie != NULL) 1513 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1514 1515 if ((ni->ni_ies.htcap_ie != NULL) && 1516 (ni->ni_ies.htinfo_ie != NULL) && 1517 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1518 do_ht_setup = 1; 1519 } 1520 } 1521 1522 /* NB: must be after ni_chan is setup */ 1523 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1524 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1525 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1526 1527 /* 1528 * If the neighbor is HT compatible, flip that on. 1529 */ 1530 if (do_ht_setup) { 1531 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1532 "%s: doing HT setup\n", __func__); 1533 ieee80211_ht_node_init(ni); 1534 ieee80211_ht_updateparams(ni, 1535 ni->ni_ies.htcap_ie, 1536 ni->ni_ies.htinfo_ie); 1537 ieee80211_setup_htrates(ni, 1538 ni->ni_ies.htcap_ie, 1539 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1540 ieee80211_setup_basic_htrates(ni, 1541 ni->ni_ies.htinfo_ie); 1542 ieee80211_node_setuptxparms(ni); 1543 ieee80211_ratectl_node_init(ni); 1544 } 1545} 1546 1547/* 1548 * Do node discovery in adhoc mode on receipt of a beacon 1549 * or probe response frame. Note that for the driver's 1550 * benefit we we treat this like an association so the 1551 * driver has an opportunity to setup it's private state. 1552 */ 1553struct ieee80211_node * 1554ieee80211_add_neighbor(struct ieee80211vap *vap, 1555 const struct ieee80211_frame *wh, 1556 const struct ieee80211_scanparams *sp) 1557{ 1558 struct ieee80211_node *ni; 1559 1560 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1561 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1562 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1563 if (ni != NULL) { 1564 struct ieee80211com *ic = vap->iv_ic; 1565 1566 ieee80211_init_neighbor(ni, wh, sp); 1567 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1568 ni->ni_flags |= IEEE80211_NODE_ERP; 1569 ieee80211_node_setuptxparms(ni); 1570 ieee80211_ratectl_node_init(ni); 1571 if (ic->ic_newassoc != NULL) 1572 ic->ic_newassoc(ni, 1); 1573 /* XXX not right for 802.1x/WPA */ 1574 ieee80211_node_authorize(ni); 1575 } 1576 return ni; 1577} 1578 1579#define IS_PROBEREQ(wh) \ 1580 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1581 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1582#define IS_BCAST_PROBEREQ(wh) \ 1583 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1584 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1585 1586static __inline struct ieee80211_node * 1587_find_rxnode(struct ieee80211_node_table *nt, 1588 const struct ieee80211_frame_min *wh) 1589{ 1590 if (IS_BCAST_PROBEREQ(wh)) 1591 return NULL; /* spam bcast probe req to all vap's */ 1592 return ieee80211_find_node_locked(nt, wh->i_addr2); 1593} 1594 1595/* 1596 * Locate the node for sender, track state, and then pass the 1597 * (referenced) node up to the 802.11 layer for its use. Note 1598 * we can return NULL if the sender is not in the table. 1599 */ 1600struct ieee80211_node * 1601#ifdef IEEE80211_DEBUG_REFCNT 1602ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1603 const struct ieee80211_frame_min *wh, const char *func, int line) 1604#else 1605ieee80211_find_rxnode(struct ieee80211com *ic, 1606 const struct ieee80211_frame_min *wh) 1607#endif 1608{ 1609 struct ieee80211_node_table *nt; 1610 struct ieee80211_node *ni; 1611 1612 nt = &ic->ic_sta; 1613 IEEE80211_NODE_LOCK(nt); 1614 ni = _find_rxnode(nt, wh); 1615 IEEE80211_NODE_UNLOCK(nt); 1616 1617 return ni; 1618} 1619 1620/* 1621 * Like ieee80211_find_rxnode but use the supplied h/w 1622 * key index as a hint to locate the node in the key 1623 * mapping table. If an entry is present at the key 1624 * index we return it; otherwise do a normal lookup and 1625 * update the mapping table if the station has a unicast 1626 * key assigned to it. 1627 */ 1628struct ieee80211_node * 1629#ifdef IEEE80211_DEBUG_REFCNT 1630ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1631 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1632 const char *func, int line) 1633#else 1634ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1635 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1636#endif 1637{ 1638 struct ieee80211_node_table *nt; 1639 struct ieee80211_node *ni; 1640 1641 nt = &ic->ic_sta; 1642 IEEE80211_NODE_LOCK(nt); 1643 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1644 ni = nt->nt_keyixmap[keyix]; 1645 else 1646 ni = NULL; 1647 if (ni == NULL) { 1648 ni = _find_rxnode(nt, wh); 1649 if (ni != NULL && nt->nt_keyixmap != NULL) { 1650 /* 1651 * If the station has a unicast key cache slot 1652 * assigned update the key->node mapping table. 1653 */ 1654 keyix = ni->ni_ucastkey.wk_rxkeyix; 1655 /* XXX can keyixmap[keyix] != NULL? */ 1656 if (keyix < nt->nt_keyixmax && 1657 nt->nt_keyixmap[keyix] == NULL) { 1658 IEEE80211_DPRINTF(ni->ni_vap, 1659 IEEE80211_MSG_NODE, 1660 "%s: add key map entry %p<%s> refcnt %d\n", 1661 __func__, ni, ether_sprintf(ni->ni_macaddr), 1662 ieee80211_node_refcnt(ni)+1); 1663 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1664 } 1665 } 1666 } else { 1667 if (IS_BCAST_PROBEREQ(wh)) 1668 ni = NULL; /* spam bcast probe req to all vap's */ 1669 else 1670 ieee80211_ref_node(ni); 1671 } 1672 IEEE80211_NODE_UNLOCK(nt); 1673 1674 return ni; 1675} 1676#undef IS_BCAST_PROBEREQ 1677#undef IS_PROBEREQ 1678 1679/* 1680 * Return a reference to the appropriate node for sending 1681 * a data frame. This handles node discovery in adhoc networks. 1682 */ 1683struct ieee80211_node * 1684#ifdef IEEE80211_DEBUG_REFCNT 1685ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1686 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1687 const char *func, int line) 1688#else 1689ieee80211_find_txnode(struct ieee80211vap *vap, 1690 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1691#endif 1692{ 1693 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1694 struct ieee80211_node *ni; 1695 1696 /* 1697 * The destination address should be in the node table 1698 * unless this is a multicast/broadcast frame. We can 1699 * also optimize station mode operation, all frames go 1700 * to the bss node. 1701 */ 1702 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1703 IEEE80211_NODE_LOCK(nt); 1704 if (vap->iv_opmode == IEEE80211_M_STA || 1705 vap->iv_opmode == IEEE80211_M_WDS || 1706 IEEE80211_IS_MULTICAST(macaddr)) 1707 ni = ieee80211_ref_node(vap->iv_bss); 1708 else 1709 ni = ieee80211_find_node_locked(nt, macaddr); 1710 IEEE80211_NODE_UNLOCK(nt); 1711 1712 if (ni == NULL) { 1713 if (vap->iv_opmode == IEEE80211_M_IBSS || 1714 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1715 /* 1716 * In adhoc mode cons up a node for the destination. 1717 * Note that we need an additional reference for the 1718 * caller to be consistent with 1719 * ieee80211_find_node_locked. 1720 */ 1721 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1722 if (ni != NULL) 1723 (void) ieee80211_ref_node(ni); 1724 } else { 1725 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1726 "no node, discard frame (%s)", __func__); 1727 vap->iv_stats.is_tx_nonode++; 1728 } 1729 } 1730 return ni; 1731} 1732 1733static void 1734_ieee80211_free_node(struct ieee80211_node *ni) 1735{ 1736 struct ieee80211_node_table *nt = ni->ni_table; 1737 1738 /* 1739 * NB: careful about referencing the vap as it may be 1740 * gone if the last reference was held by a driver. 1741 * We know the com will always be present so it's safe 1742 * to use ni_ic below to reclaim resources. 1743 */ 1744#if 0 1745 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1746 "%s %p<%s> in %s table\n", __func__, ni, 1747 ether_sprintf(ni->ni_macaddr), 1748 nt != NULL ? nt->nt_name : "<gone>"); 1749#endif 1750 if (ni->ni_associd != 0) { 1751 struct ieee80211vap *vap = ni->ni_vap; 1752 if (vap->iv_aid_bitmap != NULL) 1753 IEEE80211_AID_CLR(vap, ni->ni_associd); 1754 } 1755 if (nt != NULL) { 1756 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1757 LIST_REMOVE(ni, ni_hash); 1758 } 1759 ni->ni_ic->ic_node_free(ni); 1760} 1761 1762/* 1763 * Clear any entry in the unicast key mapping table. 1764 */ 1765static int 1766node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1767{ 1768 ieee80211_keyix keyix; 1769 1770 keyix = ni->ni_ucastkey.wk_rxkeyix; 1771 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1772 nt->nt_keyixmap[keyix] == ni) { 1773 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1774 "%s: %p<%s> clear key map entry %u\n", 1775 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1776 nt->nt_keyixmap[keyix] = NULL; 1777 ieee80211_node_decref(ni); 1778 return 1; 1779 } 1780 1781 return 0; 1782} 1783 1784void 1785#ifdef IEEE80211_DEBUG_REFCNT 1786ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1787#else 1788ieee80211_free_node(struct ieee80211_node *ni) 1789#endif 1790{ 1791 struct ieee80211_node_table *nt = ni->ni_table; 1792 1793#ifdef IEEE80211_DEBUG_REFCNT 1794 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1795 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1796 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1797#endif 1798 if (nt != NULL) { 1799 IEEE80211_NODE_LOCK(nt); 1800 if (ieee80211_node_dectestref(ni)) { 1801 /* 1802 * Last reference, reclaim state. 1803 */ 1804 _ieee80211_free_node(ni); 1805 } else if (ieee80211_node_refcnt(ni) == 1) 1806 if (node_clear_keyixmap(nt, ni)) 1807 _ieee80211_free_node(ni); 1808 IEEE80211_NODE_UNLOCK(nt); 1809 } else { 1810 if (ieee80211_node_dectestref(ni)) 1811 _ieee80211_free_node(ni); 1812 } 1813} 1814 1815/* 1816 * Reclaim a unicast key and clear any key cache state. 1817 */ 1818int 1819ieee80211_node_delucastkey(struct ieee80211_node *ni) 1820{ 1821 struct ieee80211com *ic = ni->ni_ic; 1822 struct ieee80211_node_table *nt = &ic->ic_sta; 1823 struct ieee80211_node *nikey; 1824 ieee80211_keyix keyix; 1825 int isowned, status; 1826 1827 /* 1828 * NB: We must beware of LOR here; deleting the key 1829 * can cause the crypto layer to block traffic updates 1830 * which can generate a LOR against the node table lock; 1831 * grab it here and stash the key index for our use below. 1832 * 1833 * Must also beware of recursion on the node table lock. 1834 * When called from node_cleanup we may already have 1835 * the node table lock held. Unfortunately there's no 1836 * way to separate out this path so we must do this 1837 * conditionally. 1838 */ 1839 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1840 if (!isowned) 1841 IEEE80211_NODE_LOCK(nt); 1842 nikey = NULL; 1843 status = 1; /* NB: success */ 1844 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1845 keyix = ni->ni_ucastkey.wk_rxkeyix; 1846 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1847 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1848 nikey = nt->nt_keyixmap[keyix]; 1849 nt->nt_keyixmap[keyix] = NULL; 1850 } 1851 } 1852 if (!isowned) 1853 IEEE80211_NODE_UNLOCK(nt); 1854 1855 if (nikey != NULL) { 1856 KASSERT(nikey == ni, 1857 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1858 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1859 "%s: delete key map entry %p<%s> refcnt %d\n", 1860 __func__, ni, ether_sprintf(ni->ni_macaddr), 1861 ieee80211_node_refcnt(ni)-1); 1862 ieee80211_free_node(ni); 1863 } 1864 return status; 1865} 1866 1867/* 1868 * Reclaim a node. If this is the last reference count then 1869 * do the normal free work. Otherwise remove it from the node 1870 * table and mark it gone by clearing the back-reference. 1871 */ 1872static void 1873node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1874{ 1875 1876 IEEE80211_NODE_LOCK_ASSERT(nt); 1877 1878 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1879 "%s: remove %p<%s> from %s table, refcnt %d\n", 1880 __func__, ni, ether_sprintf(ni->ni_macaddr), 1881 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1882 /* 1883 * Clear any entry in the unicast key mapping table. 1884 * We need to do it here so rx lookups don't find it 1885 * in the mapping table even if it's not in the hash 1886 * table. We cannot depend on the mapping table entry 1887 * being cleared because the node may not be free'd. 1888 */ 1889 (void)node_clear_keyixmap(nt, ni); 1890 if (!ieee80211_node_dectestref(ni)) { 1891 /* 1892 * Other references are present, just remove the 1893 * node from the table so it cannot be found. When 1894 * the references are dropped storage will be 1895 * reclaimed. 1896 */ 1897 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1898 LIST_REMOVE(ni, ni_hash); 1899 ni->ni_table = NULL; /* clear reference */ 1900 } else 1901 _ieee80211_free_node(ni); 1902} 1903 1904/* 1905 * Node table support. 1906 */ 1907 1908static void 1909ieee80211_node_table_init(struct ieee80211com *ic, 1910 struct ieee80211_node_table *nt, 1911 const char *name, int inact, int keyixmax) 1912{ 1913 1914 nt->nt_ic = ic; 1915 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 1916 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ic->ic_name); 1917 TAILQ_INIT(&nt->nt_node); 1918 nt->nt_name = name; 1919 nt->nt_scangen = 1; 1920 nt->nt_inact_init = inact; 1921 nt->nt_keyixmax = keyixmax; 1922 if (nt->nt_keyixmax > 0) { 1923 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 1924 keyixmax * sizeof(struct ieee80211_node *), 1925 M_80211_NODE, 1926 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1927 if (nt->nt_keyixmap == NULL) 1928 ic_printf(ic, 1929 "Cannot allocate key index map with %u entries\n", 1930 keyixmax); 1931 } else 1932 nt->nt_keyixmap = NULL; 1933} 1934 1935static void 1936ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1937 struct ieee80211vap *match) 1938{ 1939 struct ieee80211_node *ni, *next; 1940 1941 IEEE80211_NODE_LOCK(nt); 1942 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1943 if (match != NULL && ni->ni_vap != match) 1944 continue; 1945 /* XXX can this happen? if so need's work */ 1946 if (ni->ni_associd != 0) { 1947 struct ieee80211vap *vap = ni->ni_vap; 1948 1949 if (vap->iv_auth->ia_node_leave != NULL) 1950 vap->iv_auth->ia_node_leave(ni); 1951 if (vap->iv_aid_bitmap != NULL) 1952 IEEE80211_AID_CLR(vap, ni->ni_associd); 1953 } 1954 ni->ni_wdsvap = NULL; /* clear reference */ 1955 node_reclaim(nt, ni); 1956 } 1957 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1958 /* 1959 * Make a separate pass to clear references to this vap 1960 * held by DWDS entries. They will not be matched above 1961 * because ni_vap will point to the ap vap but we still 1962 * need to clear ni_wdsvap when the WDS vap is destroyed 1963 * and/or reset. 1964 */ 1965 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1966 if (ni->ni_wdsvap == match) 1967 ni->ni_wdsvap = NULL; 1968 } 1969 IEEE80211_NODE_UNLOCK(nt); 1970} 1971 1972static void 1973ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1974{ 1975 ieee80211_node_table_reset(nt, NULL); 1976 if (nt->nt_keyixmap != NULL) { 1977#ifdef DIAGNOSTIC 1978 /* XXX verify all entries are NULL */ 1979 int i; 1980 for (i = 0; i < nt->nt_keyixmax; i++) 1981 if (nt->nt_keyixmap[i] != NULL) 1982 printf("%s: %s[%u] still active\n", __func__, 1983 nt->nt_name, i); 1984#endif 1985 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 1986 nt->nt_keyixmap = NULL; 1987 } 1988 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1989 IEEE80211_NODE_LOCK_DESTROY(nt); 1990} 1991 1992/* 1993 * Timeout inactive stations and do related housekeeping. 1994 * Note that we cannot hold the node lock while sending a 1995 * frame as this would lead to a LOR. Instead we use a 1996 * generation number to mark nodes that we've scanned and 1997 * drop the lock and restart a scan if we have to time out 1998 * a node. Since we are single-threaded by virtue of 1999 * controlling the inactivity timer we can be sure this will 2000 * process each node only once. 2001 */ 2002static void 2003ieee80211_timeout_stations(struct ieee80211com *ic) 2004{ 2005 struct ieee80211_node_table *nt = &ic->ic_sta; 2006 struct ieee80211vap *vap; 2007 struct ieee80211_node *ni; 2008 int gen = 0; 2009 2010 IEEE80211_NODE_ITERATE_LOCK(nt); 2011 gen = ++nt->nt_scangen; 2012restart: 2013 IEEE80211_NODE_LOCK(nt); 2014 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2015 if (ni->ni_scangen == gen) /* previously handled */ 2016 continue; 2017 ni->ni_scangen = gen; 2018 /* 2019 * Ignore entries for which have yet to receive an 2020 * authentication frame. These are transient and 2021 * will be reclaimed when the last reference to them 2022 * goes away (when frame xmits complete). 2023 */ 2024 vap = ni->ni_vap; 2025 /* 2026 * Only process stations when in RUN state. This 2027 * insures, for example, that we don't timeout an 2028 * inactive station during CAC. Note that CSA state 2029 * is actually handled in ieee80211_node_timeout as 2030 * it applies to more than timeout processing. 2031 */ 2032 if (vap->iv_state != IEEE80211_S_RUN) 2033 continue; 2034 /* XXX can vap be NULL? */ 2035 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2036 vap->iv_opmode == IEEE80211_M_STA) && 2037 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2038 continue; 2039 /* 2040 * Free fragment if not needed anymore 2041 * (last fragment older than 1s). 2042 * XXX doesn't belong here, move to node_age 2043 */ 2044 if (ni->ni_rxfrag[0] != NULL && 2045 ticks > ni->ni_rxfragstamp + hz) { 2046 m_freem(ni->ni_rxfrag[0]); 2047 ni->ni_rxfrag[0] = NULL; 2048 } 2049 if (ni->ni_inact > 0) { 2050 ni->ni_inact--; 2051 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2052 "%s: inact %u inact_reload %u nrates %u", 2053 __func__, ni->ni_inact, ni->ni_inact_reload, 2054 ni->ni_rates.rs_nrates); 2055 } 2056 /* 2057 * Special case ourself; we may be idle for extended periods 2058 * of time and regardless reclaiming our state is wrong. 2059 * XXX run ic_node_age 2060 */ 2061 if (ni == vap->iv_bss) 2062 continue; 2063 if (ni->ni_associd != 0 || 2064 (vap->iv_opmode == IEEE80211_M_IBSS || 2065 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2066 /* 2067 * Age/drain resources held by the station. 2068 */ 2069 ic->ic_node_age(ni); 2070 /* 2071 * Probe the station before time it out. We 2072 * send a null data frame which may not be 2073 * universally supported by drivers (need it 2074 * for ps-poll support so it should be...). 2075 * 2076 * XXX don't probe the station unless we've 2077 * received a frame from them (and have 2078 * some idea of the rates they are capable 2079 * of); this will get fixed more properly 2080 * soon with better handling of the rate set. 2081 */ 2082 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2083 (0 < ni->ni_inact && 2084 ni->ni_inact <= vap->iv_inact_probe) && 2085 ni->ni_rates.rs_nrates != 0) { 2086 IEEE80211_NOTE(vap, 2087 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2088 ni, "%s", 2089 "probe station due to inactivity"); 2090 /* 2091 * Grab a reference before unlocking the table 2092 * so the node cannot be reclaimed before we 2093 * send the frame. ieee80211_send_nulldata 2094 * understands we've done this and reclaims the 2095 * ref for us as needed. 2096 */ 2097 ieee80211_ref_node(ni); 2098 IEEE80211_NODE_UNLOCK(nt); 2099 ieee80211_send_nulldata(ni); 2100 /* XXX stat? */ 2101 goto restart; 2102 } 2103 } 2104 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2105 ni->ni_inact <= 0) { 2106 IEEE80211_NOTE(vap, 2107 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2108 "station timed out due to inactivity " 2109 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2110 /* 2111 * Send a deauthenticate frame and drop the station. 2112 * This is somewhat complicated due to reference counts 2113 * and locking. At this point a station will typically 2114 * have a reference count of 1. ieee80211_node_leave 2115 * will do a "free" of the node which will drop the 2116 * reference count. But in the meantime a reference 2117 * wil be held by the deauth frame. The actual reclaim 2118 * of the node will happen either after the tx is 2119 * completed or by ieee80211_node_leave. 2120 * 2121 * Separately we must drop the node lock before sending 2122 * in case the driver takes a lock, as this can result 2123 * in a LOR between the node lock and the driver lock. 2124 */ 2125 ieee80211_ref_node(ni); 2126 IEEE80211_NODE_UNLOCK(nt); 2127 if (ni->ni_associd != 0) { 2128 IEEE80211_SEND_MGMT(ni, 2129 IEEE80211_FC0_SUBTYPE_DEAUTH, 2130 IEEE80211_REASON_AUTH_EXPIRE); 2131 } 2132 ieee80211_node_leave(ni); 2133 ieee80211_free_node(ni); 2134 vap->iv_stats.is_node_timeout++; 2135 goto restart; 2136 } 2137 } 2138 IEEE80211_NODE_UNLOCK(nt); 2139 2140 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2141} 2142 2143/* 2144 * Aggressively reclaim resources. This should be used 2145 * only in a critical situation to reclaim mbuf resources. 2146 */ 2147void 2148ieee80211_drain(struct ieee80211com *ic) 2149{ 2150 struct ieee80211_node_table *nt = &ic->ic_sta; 2151 struct ieee80211vap *vap; 2152 struct ieee80211_node *ni; 2153 2154 IEEE80211_NODE_LOCK(nt); 2155 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2156 /* 2157 * Ignore entries for which have yet to receive an 2158 * authentication frame. These are transient and 2159 * will be reclaimed when the last reference to them 2160 * goes away (when frame xmits complete). 2161 */ 2162 vap = ni->ni_vap; 2163 /* 2164 * Only process stations when in RUN state. This 2165 * insures, for example, that we don't timeout an 2166 * inactive station during CAC. Note that CSA state 2167 * is actually handled in ieee80211_node_timeout as 2168 * it applies to more than timeout processing. 2169 */ 2170 if (vap->iv_state != IEEE80211_S_RUN) 2171 continue; 2172 /* XXX can vap be NULL? */ 2173 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2174 vap->iv_opmode == IEEE80211_M_STA) && 2175 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2176 continue; 2177 /* 2178 * Free fragments. 2179 * XXX doesn't belong here, move to node_drain 2180 */ 2181 if (ni->ni_rxfrag[0] != NULL) { 2182 m_freem(ni->ni_rxfrag[0]); 2183 ni->ni_rxfrag[0] = NULL; 2184 } 2185 /* 2186 * Drain resources held by the station. 2187 */ 2188 ic->ic_node_drain(ni); 2189 } 2190 IEEE80211_NODE_UNLOCK(nt); 2191} 2192 2193/* 2194 * Per-ieee80211com inactivity timer callback. 2195 */ 2196void 2197ieee80211_node_timeout(void *arg) 2198{ 2199 struct ieee80211com *ic = arg; 2200 2201 /* 2202 * Defer timeout processing if a channel switch is pending. 2203 * We typically need to be mute so not doing things that 2204 * might generate frames is good to handle in one place. 2205 * Supressing the station timeout processing may extend the 2206 * lifetime of inactive stations (by not decrementing their 2207 * idle counters) but this should be ok unless the CSA is 2208 * active for an unusually long time. 2209 */ 2210 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2211 ieee80211_scan_timeout(ic); 2212 ieee80211_timeout_stations(ic); 2213 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2214 2215 IEEE80211_LOCK(ic); 2216 ieee80211_erp_timeout(ic); 2217 ieee80211_ht_timeout(ic); 2218 IEEE80211_UNLOCK(ic); 2219 } 2220 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2221 ieee80211_node_timeout, ic); 2222} 2223 2224/* 2225 * Iterate over the node table and return an array of ref'ed nodes. 2226 * 2227 * This is separated out from calling the actual node function so that 2228 * no LORs will occur. 2229 * 2230 * If there are too many nodes (ie, the number of nodes doesn't fit 2231 * within 'max_aid' entries) then the node references will be freed 2232 * and an error will be returned. 2233 * 2234 * The responsibility of allocating and freeing "ni_arr" is up to 2235 * the caller. 2236 */ 2237int 2238ieee80211_iterate_nt(struct ieee80211_node_table *nt, 2239 struct ieee80211_node **ni_arr, uint16_t max_aid) 2240{ 2241 u_int gen; 2242 int i, j, ret; 2243 struct ieee80211_node *ni; 2244 2245 IEEE80211_NODE_ITERATE_LOCK(nt); 2246 IEEE80211_NODE_LOCK(nt); 2247 2248 gen = ++nt->nt_scangen; 2249 i = ret = 0; 2250 2251 /* 2252 * We simply assume here that since the node 2253 * scan generation doesn't change (as 2254 * we are holding both the node table and 2255 * node table iteration locks), we can simply 2256 * assign it to the node here. 2257 */ 2258 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2259 if (i >= max_aid) { 2260 ret = E2BIG; 2261 ic_printf(nt->nt_ic, "Node array overflow: max=%u", 2262 max_aid); 2263 break; 2264 } 2265 ni_arr[i] = ieee80211_ref_node(ni); 2266 ni_arr[i]->ni_scangen = gen; 2267 i++; 2268 } 2269 2270 /* 2271 * It's safe to unlock here. 2272 * 2273 * If we're successful, the list is returned. 2274 * If we're unsuccessful, the list is ignored 2275 * and we remove our references. 2276 * 2277 * This avoids any potential LOR with 2278 * ieee80211_free_node(). 2279 */ 2280 IEEE80211_NODE_UNLOCK(nt); 2281 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2282 2283 /* 2284 * If ret is non-zero, we hit some kind of error. 2285 * Rather than walking some nodes, we'll walk none 2286 * of them. 2287 */ 2288 if (ret) { 2289 for (j = 0; j < i; j++) { 2290 /* ieee80211_free_node() locks by itself */ 2291 ieee80211_free_node(ni_arr[j]); 2292 } 2293 } 2294 2295 return (ret); 2296} 2297 2298/* 2299 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2300 * reference in the source. 2301 * 2302 * Note that this fetches 'max_aid' from the first VAP, rather than finding 2303 * the largest max_aid from all VAPs. 2304 */ 2305void 2306ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2307 ieee80211_iter_func *f, void *arg) 2308{ 2309 struct ieee80211_node **ni_arr; 2310 size_t size; 2311 int i; 2312 uint16_t max_aid; 2313 struct ieee80211vap *vap; 2314 2315 /* Overdoing it default */ 2316 max_aid = IEEE80211_AID_MAX; 2317 2318 /* Handle the case of there being no vaps just yet */ 2319 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps); 2320 if (vap != NULL) 2321 max_aid = vap->iv_max_aid; 2322 2323 size = max_aid * sizeof(struct ieee80211_node *); 2324 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2325 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2326 if (ni_arr == NULL) 2327 return; 2328 2329 /* 2330 * If this fails, the node table won't have any 2331 * valid entries - ieee80211_iterate_nt() frees 2332 * the references to them. So don't try walking 2333 * the table; just skip to the end and free the 2334 * temporary memory. 2335 */ 2336 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0) 2337 goto done; 2338 2339 for (i = 0; i < max_aid; i++) { 2340 if (ni_arr[i] == NULL) /* end of the list */ 2341 break; 2342 (*f)(arg, ni_arr[i]); 2343 /* ieee80211_free_node() locks by itself */ 2344 ieee80211_free_node(ni_arr[i]); 2345 } 2346 2347done: 2348 IEEE80211_FREE(ni_arr, M_80211_NODE); 2349} 2350 2351void 2352ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2353{ 2354 printf("0x%p: mac %s refcnt %d\n", ni, 2355 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2356 printf("\tscangen %u authmode %u flags 0x%x\n", 2357 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2358 printf("\tassocid 0x%x txpower %u vlan %u\n", 2359 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2360 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2361 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2362 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2363 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2364 ni->ni_rxfragstamp); 2365 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2366 node_getrssi(ni), ni->ni_noise, 2367 ni->ni_intval, ni->ni_capinfo); 2368 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2369 ether_sprintf(ni->ni_bssid), 2370 ni->ni_esslen, ni->ni_essid, 2371 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2372 printf("\tinact %u inact_reload %u txrate %u\n", 2373 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2374 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2375 ni->ni_htcap, ni->ni_htparam, 2376 ni->ni_htctlchan, ni->ni_ht2ndchan); 2377 printf("\thtopmode %x htstbc %x chw %u\n", 2378 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2379} 2380 2381void 2382ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2383{ 2384 ieee80211_iterate_nodes(nt, 2385 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2386} 2387 2388static void 2389ieee80211_notify_erp_locked(struct ieee80211com *ic) 2390{ 2391 struct ieee80211vap *vap; 2392 2393 IEEE80211_LOCK_ASSERT(ic); 2394 2395 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2396 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2397 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2398} 2399 2400void 2401ieee80211_notify_erp(struct ieee80211com *ic) 2402{ 2403 IEEE80211_LOCK(ic); 2404 ieee80211_notify_erp_locked(ic); 2405 IEEE80211_UNLOCK(ic); 2406} 2407 2408/* 2409 * Handle a station joining an 11g network. 2410 */ 2411static void 2412ieee80211_node_join_11g(struct ieee80211_node *ni) 2413{ 2414 struct ieee80211com *ic = ni->ni_ic; 2415 2416 IEEE80211_LOCK_ASSERT(ic); 2417 2418 /* 2419 * Station isn't capable of short slot time. Bump 2420 * the count of long slot time stations and disable 2421 * use of short slot time. Note that the actual switch 2422 * over to long slot time use may not occur until the 2423 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2424 */ 2425 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2426 ic->ic_longslotsta++; 2427 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2428 "station needs long slot time, count %d", 2429 ic->ic_longslotsta); 2430 /* XXX vap's w/ conflicting needs won't work */ 2431 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2432 /* 2433 * Don't force slot time when switched to turbo 2434 * mode as non-ERP stations won't be present; this 2435 * need only be done when on the normal G channel. 2436 */ 2437 ieee80211_set_shortslottime(ic, 0); 2438 } 2439 } 2440 /* 2441 * If the new station is not an ERP station 2442 * then bump the counter and enable protection 2443 * if configured. 2444 */ 2445 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2446 ic->ic_nonerpsta++; 2447 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2448 "station is !ERP, %d non-ERP stations associated", 2449 ic->ic_nonerpsta); 2450 /* 2451 * If station does not support short preamble 2452 * then we must enable use of Barker preamble. 2453 */ 2454 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2455 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2456 "%s", "station needs long preamble"); 2457 ic->ic_flags |= IEEE80211_F_USEBARKER; 2458 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2459 } 2460 /* 2461 * If protection is configured and this is the first 2462 * indication we should use protection, enable it. 2463 */ 2464 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2465 ic->ic_nonerpsta == 1 && 2466 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2467 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2468 "%s: enable use of protection\n", __func__); 2469 ic->ic_flags |= IEEE80211_F_USEPROT; 2470 ieee80211_notify_erp_locked(ic); 2471 } 2472 } else 2473 ni->ni_flags |= IEEE80211_NODE_ERP; 2474} 2475 2476void 2477ieee80211_node_join(struct ieee80211_node *ni, int resp) 2478{ 2479 struct ieee80211com *ic = ni->ni_ic; 2480 struct ieee80211vap *vap = ni->ni_vap; 2481 int newassoc; 2482 2483 if (ni->ni_associd == 0) { 2484 uint16_t aid; 2485 2486 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2487 /* 2488 * It would be good to search the bitmap 2489 * more efficiently, but this will do for now. 2490 */ 2491 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2492 if (!IEEE80211_AID_ISSET(vap, aid)) 2493 break; 2494 } 2495 if (aid >= vap->iv_max_aid) { 2496 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2497 ieee80211_node_leave(ni); 2498 return; 2499 } 2500 ni->ni_associd = aid | 0xc000; 2501 ni->ni_jointime = time_uptime; 2502 IEEE80211_LOCK(ic); 2503 IEEE80211_AID_SET(vap, ni->ni_associd); 2504 vap->iv_sta_assoc++; 2505 ic->ic_sta_assoc++; 2506 2507 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2508 ieee80211_ht_node_join(ni); 2509 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2510 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2511 ieee80211_node_join_11g(ni); 2512 IEEE80211_UNLOCK(ic); 2513 2514 newassoc = 1; 2515 } else 2516 newassoc = 0; 2517 2518 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2519 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2520 IEEE80211_NODE_AID(ni), 2521 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2522 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2523 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2524 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2525 ni->ni_flags & IEEE80211_NODE_HT ? 2526 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2527 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2528 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2529 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2530 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2531 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2532 ", fast-frames" : "", 2533 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2534 ", turbo" : "" 2535 ); 2536 2537 ieee80211_node_setuptxparms(ni); 2538 ieee80211_ratectl_node_init(ni); 2539 /* give driver a chance to setup state like ni_txrate */ 2540 if (ic->ic_newassoc != NULL) 2541 ic->ic_newassoc(ni, newassoc); 2542 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2543 /* tell the authenticator about new station */ 2544 if (vap->iv_auth->ia_node_join != NULL) 2545 vap->iv_auth->ia_node_join(ni); 2546 ieee80211_notify_node_join(ni, 2547 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2548} 2549 2550static void 2551disable_protection(struct ieee80211com *ic) 2552{ 2553 KASSERT(ic->ic_nonerpsta == 0 && 2554 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2555 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2556 ic->ic_flags_ext)); 2557 2558 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2559 /* XXX verify mode? */ 2560 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2561 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2562 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2563 } 2564 ieee80211_notify_erp_locked(ic); 2565} 2566 2567/* 2568 * Handle a station leaving an 11g network. 2569 */ 2570static void 2571ieee80211_node_leave_11g(struct ieee80211_node *ni) 2572{ 2573 struct ieee80211com *ic = ni->ni_ic; 2574 2575 IEEE80211_LOCK_ASSERT(ic); 2576 2577 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2578 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2579 ic->ic_bsschan->ic_flags)); 2580 2581 /* 2582 * If a long slot station do the slot time bookkeeping. 2583 */ 2584 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2585 KASSERT(ic->ic_longslotsta > 0, 2586 ("bogus long slot station count %d", ic->ic_longslotsta)); 2587 ic->ic_longslotsta--; 2588 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2589 "long slot time station leaves, count now %d", 2590 ic->ic_longslotsta); 2591 if (ic->ic_longslotsta == 0) { 2592 /* 2593 * Re-enable use of short slot time if supported 2594 * and not operating in IBSS mode (per spec). 2595 */ 2596 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2597 ic->ic_opmode != IEEE80211_M_IBSS) { 2598 IEEE80211_DPRINTF(ni->ni_vap, 2599 IEEE80211_MSG_ASSOC, 2600 "%s: re-enable use of short slot time\n", 2601 __func__); 2602 ieee80211_set_shortslottime(ic, 1); 2603 } 2604 } 2605 } 2606 /* 2607 * If a non-ERP station do the protection-related bookkeeping. 2608 */ 2609 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2610 KASSERT(ic->ic_nonerpsta > 0, 2611 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2612 ic->ic_nonerpsta--; 2613 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2614 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2615 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2616 " (non-ERP sta present)" : ""); 2617 if (ic->ic_nonerpsta == 0 && 2618 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2619 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2620 "%s: disable use of protection\n", __func__); 2621 disable_protection(ic); 2622 } 2623 } 2624} 2625 2626/* 2627 * Time out presence of an overlapping bss with non-ERP 2628 * stations. When operating in hostap mode we listen for 2629 * beacons from other stations and if we identify a non-ERP 2630 * station is present we enable protection. To identify 2631 * when all non-ERP stations are gone we time out this 2632 * condition. 2633 */ 2634static void 2635ieee80211_erp_timeout(struct ieee80211com *ic) 2636{ 2637 2638 IEEE80211_LOCK_ASSERT(ic); 2639 2640 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2641 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2642#if 0 2643 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2644 "%s", "age out non-ERP sta present on channel"); 2645#endif 2646 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2647 if (ic->ic_nonerpsta == 0) 2648 disable_protection(ic); 2649 } 2650} 2651 2652/* 2653 * Handle bookkeeping for station deauthentication/disassociation 2654 * when operating as an ap. 2655 */ 2656void 2657ieee80211_node_leave(struct ieee80211_node *ni) 2658{ 2659 struct ieee80211com *ic = ni->ni_ic; 2660 struct ieee80211vap *vap = ni->ni_vap; 2661 struct ieee80211_node_table *nt = ni->ni_table; 2662 2663 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2664 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2665 2666 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2667 ("unexpected operating mode %u", vap->iv_opmode)); 2668 /* 2669 * If node wasn't previously associated all 2670 * we need to do is reclaim the reference. 2671 */ 2672 /* XXX ibss mode bypasses 11g and notification */ 2673 if (ni->ni_associd == 0) 2674 goto done; 2675 /* 2676 * Tell the authenticator the station is leaving. 2677 * Note that we must do this before yanking the 2678 * association id as the authenticator uses the 2679 * associd to locate it's state block. 2680 */ 2681 if (vap->iv_auth->ia_node_leave != NULL) 2682 vap->iv_auth->ia_node_leave(ni); 2683 2684 IEEE80211_LOCK(ic); 2685 IEEE80211_AID_CLR(vap, ni->ni_associd); 2686 vap->iv_sta_assoc--; 2687 ic->ic_sta_assoc--; 2688 2689 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2690 ieee80211_ht_node_leave(ni); 2691 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2692 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2693 ieee80211_node_leave_11g(ni); 2694 IEEE80211_UNLOCK(ic); 2695 /* 2696 * Cleanup station state. In particular clear various 2697 * state that might otherwise be reused if the node 2698 * is reused before the reference count goes to zero 2699 * (and memory is reclaimed). 2700 */ 2701 ieee80211_sta_leave(ni); 2702done: 2703 /* 2704 * Remove the node from any table it's recorded in and 2705 * drop the caller's reference. Removal from the table 2706 * is important to insure the node is not reprocessed 2707 * for inactivity. 2708 */ 2709 if (nt != NULL) { 2710 IEEE80211_NODE_LOCK(nt); 2711 node_reclaim(nt, ni); 2712 IEEE80211_NODE_UNLOCK(nt); 2713 } else 2714 ieee80211_free_node(ni); 2715} 2716 2717struct rssiinfo { 2718 struct ieee80211vap *vap; 2719 int rssi_samples; 2720 uint32_t rssi_total; 2721}; 2722 2723static void 2724get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2725{ 2726 struct rssiinfo *info = arg; 2727 struct ieee80211vap *vap = ni->ni_vap; 2728 int8_t rssi; 2729 2730 if (info->vap != vap) 2731 return; 2732 /* only associated stations */ 2733 if (ni->ni_associd == 0) 2734 return; 2735 rssi = vap->iv_ic->ic_node_getrssi(ni); 2736 if (rssi != 0) { 2737 info->rssi_samples++; 2738 info->rssi_total += rssi; 2739 } 2740} 2741 2742static void 2743get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2744{ 2745 struct rssiinfo *info = arg; 2746 struct ieee80211vap *vap = ni->ni_vap; 2747 int8_t rssi; 2748 2749 if (info->vap != vap) 2750 return; 2751 /* only neighbors */ 2752 /* XXX check bssid */ 2753 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2754 return; 2755 rssi = vap->iv_ic->ic_node_getrssi(ni); 2756 if (rssi != 0) { 2757 info->rssi_samples++; 2758 info->rssi_total += rssi; 2759 } 2760} 2761 2762#ifdef IEEE80211_SUPPORT_MESH 2763static void 2764get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2765{ 2766 struct rssiinfo *info = arg; 2767 struct ieee80211vap *vap = ni->ni_vap; 2768 int8_t rssi; 2769 2770 if (info->vap != vap) 2771 return; 2772 /* only neighbors that peered successfully */ 2773 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2774 return; 2775 rssi = vap->iv_ic->ic_node_getrssi(ni); 2776 if (rssi != 0) { 2777 info->rssi_samples++; 2778 info->rssi_total += rssi; 2779 } 2780} 2781#endif /* IEEE80211_SUPPORT_MESH */ 2782 2783int8_t 2784ieee80211_getrssi(struct ieee80211vap *vap) 2785{ 2786#define NZ(x) ((x) == 0 ? 1 : (x)) 2787 struct ieee80211com *ic = vap->iv_ic; 2788 struct rssiinfo info; 2789 2790 info.rssi_total = 0; 2791 info.rssi_samples = 0; 2792 info.vap = vap; 2793 switch (vap->iv_opmode) { 2794 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2795 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2796 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2797 break; 2798 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2799 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2800 break; 2801#ifdef IEEE80211_SUPPORT_MESH 2802 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2803 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2804 break; 2805#endif 2806 case IEEE80211_M_MONITOR: /* XXX */ 2807 case IEEE80211_M_STA: /* use stats from associated ap */ 2808 default: 2809 if (vap->iv_bss != NULL) 2810 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2811 info.rssi_samples = 1; 2812 break; 2813 } 2814 return info.rssi_total / NZ(info.rssi_samples); 2815#undef NZ 2816} 2817 2818void 2819ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2820{ 2821 2822 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2823 return; 2824 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2825 /* for non-station mode return avg'd rssi accounting */ 2826 if (vap->iv_opmode != IEEE80211_M_STA) 2827 *rssi = ieee80211_getrssi(vap); 2828} 2829