ieee80211_node.c revision 297731
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 297731 2016-04-09 04:57:25Z 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%c\n", __func__, 334 ieee80211_opmode_name[vap->iv_opmode], 335 ieee80211_chan2ieee(ic, chan), 336 ieee80211_channel_type_char(chan)); 337 338 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 339 if (ni == NULL) { 340 /* XXX recovery? */ 341 return; 342 } 343 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 344 ni->ni_esslen = vap->iv_des_ssid[0].len; 345 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 346 if (vap->iv_bss != NULL) 347 copy_bss(ni, vap->iv_bss); 348 ni->ni_intval = ic->ic_bintval; 349 if (vap->iv_flags & IEEE80211_F_PRIVACY) 350 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 351 if (ic->ic_phytype == IEEE80211_T_FH) { 352 ni->ni_fhdwell = 200; /* XXX */ 353 ni->ni_fhindex = 1; 354 } 355 if (vap->iv_opmode == IEEE80211_M_IBSS) { 356 vap->iv_flags |= IEEE80211_F_SIBSS; 357 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 358 if (vap->iv_flags & IEEE80211_F_DESBSSID) 359 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 360 else { 361 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 362 /* clear group bit, add local bit */ 363 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 364 } 365 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 366 if (vap->iv_flags & IEEE80211_F_DESBSSID) 367 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 368 else 369#ifdef IEEE80211_SUPPORT_TDMA 370 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 371#endif 372 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 373#ifdef IEEE80211_SUPPORT_MESH 374 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 375 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 376 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 377#endif 378 } 379 /* 380 * Fix the channel and related attributes. 381 */ 382 /* clear DFS CAC state on previous channel */ 383 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 384 ic->ic_bsschan->ic_freq != chan->ic_freq && 385 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 386 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 387 ic->ic_bsschan = chan; 388 ieee80211_node_set_chan(ni, chan); 389 ic->ic_curmode = ieee80211_chan2mode(chan); 390 /* 391 * Do mode-specific setup. 392 */ 393 if (IEEE80211_IS_CHAN_FULL(chan)) { 394 if (IEEE80211_IS_CHAN_ANYG(chan)) { 395 /* 396 * Use a mixed 11b/11g basic rate set. 397 */ 398 ieee80211_setbasicrates(&ni->ni_rates, 399 IEEE80211_MODE_11G); 400 if (vap->iv_flags & IEEE80211_F_PUREG) { 401 /* 402 * Also mark OFDM rates basic so 11b 403 * stations do not join (WiFi compliance). 404 */ 405 ieee80211_addbasicrates(&ni->ni_rates, 406 IEEE80211_MODE_11A); 407 } 408 } else if (IEEE80211_IS_CHAN_B(chan)) { 409 /* 410 * Force pure 11b rate set. 411 */ 412 ieee80211_setbasicrates(&ni->ni_rates, 413 IEEE80211_MODE_11B); 414 } 415 } 416 417 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 418} 419 420/* 421 * Reset bss state on transition to the INIT state. 422 * Clear any stations from the table (they have been 423 * deauth'd) and reset the bss node (clears key, rate 424 * etc. state). 425 */ 426void 427ieee80211_reset_bss(struct ieee80211vap *vap) 428{ 429 struct ieee80211com *ic = vap->iv_ic; 430 struct ieee80211_node *ni, *obss; 431 432 ieee80211_node_table_reset(&ic->ic_sta, vap); 433 /* XXX multi-bss: wrong */ 434 ieee80211_reset_erp(ic); 435 436 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 437 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 438 obss = vap->iv_bss; 439 vap->iv_bss = ieee80211_ref_node(ni); 440 if (obss != NULL) { 441 copy_bss(ni, obss); 442 ni->ni_intval = ic->ic_bintval; 443 ieee80211_free_node(obss); 444 } else 445 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 446} 447 448static int 449match_ssid(const struct ieee80211_node *ni, 450 int nssid, const struct ieee80211_scan_ssid ssids[]) 451{ 452 int i; 453 454 for (i = 0; i < nssid; i++) { 455 if (ni->ni_esslen == ssids[i].len && 456 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 457 return 1; 458 } 459 return 0; 460} 461 462/* 463 * Test a node for suitability/compatibility. 464 */ 465static int 466check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 467{ 468 struct ieee80211com *ic = ni->ni_ic; 469 uint8_t rate; 470 471 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 472 return 0; 473 if (vap->iv_opmode == IEEE80211_M_IBSS) { 474 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 475 return 0; 476 } else { 477 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 478 return 0; 479 } 480 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 481 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 482 return 0; 483 } else { 484 /* XXX does this mean privacy is supported or required? */ 485 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 486 return 0; 487 } 488 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 489 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 490 if (rate & IEEE80211_RATE_BASIC) 491 return 0; 492 if (vap->iv_des_nssid != 0 && 493 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 494 return 0; 495 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 496 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 497 return 0; 498 return 1; 499} 500 501#ifdef IEEE80211_DEBUG 502/* 503 * Display node suitability/compatibility. 504 */ 505static void 506check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 507{ 508 struct ieee80211com *ic = ni->ni_ic; 509 uint8_t rate; 510 int fail; 511 512 fail = 0; 513 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 514 fail |= 0x01; 515 if (vap->iv_opmode == IEEE80211_M_IBSS) { 516 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 517 fail |= 0x02; 518 } else { 519 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 520 fail |= 0x02; 521 } 522 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 523 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 524 fail |= 0x04; 525 } else { 526 /* XXX does this mean privacy is supported or required? */ 527 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 528 fail |= 0x04; 529 } 530 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 531 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 532 if (rate & IEEE80211_RATE_BASIC) 533 fail |= 0x08; 534 if (vap->iv_des_nssid != 0 && 535 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 536 fail |= 0x10; 537 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 538 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 539 fail |= 0x20; 540 541 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 542 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 543 printf(" %3d%c", 544 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 545 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 546 fail & 0x08 ? '!' : ' '); 547 printf(" %4s%c", 548 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 549 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 550 "????", 551 fail & 0x02 ? '!' : ' '); 552 printf(" %3s%c ", 553 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 554 fail & 0x04 ? '!' : ' '); 555 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 556 printf("%s\n", fail & 0x10 ? "!" : ""); 557} 558#endif /* IEEE80211_DEBUG */ 559 560 561int 562ieee80211_ibss_merge_check(struct ieee80211_node *ni) 563{ 564 struct ieee80211vap *vap = ni->ni_vap; 565 566 if (ni == vap->iv_bss || 567 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 568 /* unchanged, nothing to do */ 569 return 0; 570 } 571 572 if (!check_bss(vap, ni)) { 573 /* capabilities mismatch */ 574 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 575 "%s: merge failed, capabilities mismatch\n", __func__); 576#ifdef IEEE80211_DEBUG 577 if (ieee80211_msg_assoc(vap)) 578 check_bss_debug(vap, ni); 579#endif 580 vap->iv_stats.is_ibss_capmismatch++; 581 return 0; 582 } 583 584 return 1; 585} 586 587/* 588 * Handle 802.11 ad hoc network merge. The 589 * convention, set by the Wireless Ethernet Compatibility Alliance 590 * (WECA), is that an 802.11 station will change its BSSID to match 591 * the "oldest" 802.11 ad hoc network, on the same channel, that 592 * has the station's desired SSID. The "oldest" 802.11 network 593 * sends beacons with the greatest TSF timestamp. 594 * 595 * The caller is assumed to validate TSF's before attempting a merge. 596 * 597 * Return !0 if the BSSID changed, 0 otherwise. 598 */ 599int 600ieee80211_ibss_merge(struct ieee80211_node *ni) 601{ 602 struct ieee80211vap *vap = ni->ni_vap; 603#ifdef IEEE80211_DEBUG 604 struct ieee80211com *ic = ni->ni_ic; 605#endif 606 607 if (! ieee80211_ibss_merge_check(ni)) 608 return 0; 609 610 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 611 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 612 ether_sprintf(ni->ni_bssid), 613 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 614 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 615 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 616 ); 617 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 618} 619 620/* 621 * Calculate HT channel promotion flags for all vaps. 622 * This assumes ni_chan have been setup for each vap. 623 */ 624static int 625gethtadjustflags(struct ieee80211com *ic) 626{ 627 struct ieee80211vap *vap; 628 int flags; 629 630 flags = 0; 631 /* XXX locking */ 632 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 633 if (vap->iv_state < IEEE80211_S_RUN) 634 continue; 635 switch (vap->iv_opmode) { 636 case IEEE80211_M_WDS: 637 case IEEE80211_M_STA: 638 case IEEE80211_M_AHDEMO: 639 case IEEE80211_M_HOSTAP: 640 case IEEE80211_M_IBSS: 641 case IEEE80211_M_MBSS: 642 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 643 break; 644 default: 645 break; 646 } 647 } 648 return flags; 649} 650 651/* 652 * Check if the current channel needs to change based on whether 653 * any vap's are using HT20/HT40. This is used to sync the state 654 * of ic_curchan after a channel width change on a running vap. 655 */ 656void 657ieee80211_sync_curchan(struct ieee80211com *ic) 658{ 659 struct ieee80211_channel *c; 660 661 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 662 if (c != ic->ic_curchan) { 663 ic->ic_curchan = c; 664 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 665 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 666 IEEE80211_UNLOCK(ic); 667 ic->ic_set_channel(ic); 668 ieee80211_radiotap_chan_change(ic); 669 IEEE80211_LOCK(ic); 670 } 671} 672 673/* 674 * Setup the current channel. The request channel may be 675 * promoted if other vap's are operating with HT20/HT40. 676 */ 677void 678ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 679{ 680 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 681 int flags = gethtadjustflags(ic); 682 /* 683 * Check for channel promotion required to support the 684 * set of running vap's. This assumes we are called 685 * after ni_chan is setup for each vap. 686 */ 687 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 688 if (flags > ieee80211_htchanflags(c)) 689 c = ieee80211_ht_adjust_channel(ic, c, flags); 690 } 691 ic->ic_bsschan = ic->ic_curchan = c; 692 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 693 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 694} 695 696/* 697 * Change the current channel. The channel change is guaranteed to have 698 * happened before the next state change. 699 */ 700void 701ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 702{ 703 ieee80211_setupcurchan(ic, c); 704 ieee80211_runtask(ic, &ic->ic_chan_task); 705} 706 707void 708ieee80211_update_chw(struct ieee80211com *ic) 709{ 710 711 ieee80211_setupcurchan(ic, ic->ic_curchan); 712 ieee80211_runtask(ic, &ic->ic_chw_task); 713} 714 715/* 716 * Join the specified IBSS/BSS network. The node is assumed to 717 * be passed in with a held reference. 718 */ 719static int 720ieee80211_sta_join1(struct ieee80211_node *selbs) 721{ 722 struct ieee80211vap *vap = selbs->ni_vap; 723 struct ieee80211com *ic = selbs->ni_ic; 724 struct ieee80211_node *obss; 725 int canreassoc; 726 727 /* 728 * Committed to selbs, setup state. 729 */ 730 obss = vap->iv_bss; 731 /* 732 * Check if old+new node have the same address in which 733 * case we can reassociate when operating in sta mode. 734 */ 735 canreassoc = (obss != NULL && 736 vap->iv_state == IEEE80211_S_RUN && 737 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 738 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 739 if (obss != NULL) { 740 struct ieee80211_node_table *nt = obss->ni_table; 741 742 copy_bss(selbs, obss); 743 ieee80211_node_decref(obss); /* iv_bss reference */ 744 745 IEEE80211_NODE_LOCK(nt); 746 node_reclaim(nt, obss); /* station table reference */ 747 IEEE80211_NODE_UNLOCK(nt); 748 749 obss = NULL; /* NB: guard against later use */ 750 } 751 752 /* 753 * Delete unusable rates; we've already checked 754 * that the negotiated rate set is acceptable. 755 */ 756 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 757 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 758 759 ieee80211_setcurchan(ic, selbs->ni_chan); 760 /* 761 * Set the erp state (mostly the slot time) to deal with 762 * the auto-select case; this should be redundant if the 763 * mode is locked. 764 */ 765 ieee80211_reset_erp(ic); 766 ieee80211_wme_initparams(vap); 767 768 if (vap->iv_opmode == IEEE80211_M_STA) { 769 if (canreassoc) { 770 /* Reassociate */ 771 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 772 } else { 773 /* 774 * Act as if we received a DEAUTH frame in case we 775 * are invoked from the RUN state. This will cause 776 * us to try to re-authenticate if we are operating 777 * as a station. 778 */ 779 ieee80211_new_state(vap, IEEE80211_S_AUTH, 780 IEEE80211_FC0_SUBTYPE_DEAUTH); 781 } 782 } else 783 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 784 return 1; 785} 786 787int 788ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 789 const struct ieee80211_scan_entry *se) 790{ 791 struct ieee80211com *ic = vap->iv_ic; 792 struct ieee80211_node *ni; 793 794 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 795 if (ni == NULL) { 796 /* XXX msg */ 797 return 0; 798 } 799 800 /* 801 * Expand scan state into node's format. 802 * XXX may not need all this stuff 803 */ 804 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 805 ni->ni_esslen = se->se_ssid[1]; 806 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 807 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 808 ni->ni_intval = se->se_intval; 809 ni->ni_capinfo = se->se_capinfo; 810 ni->ni_chan = chan; 811 ni->ni_timoff = se->se_timoff; 812 ni->ni_fhdwell = se->se_fhdwell; 813 ni->ni_fhindex = se->se_fhindex; 814 ni->ni_erp = se->se_erp; 815 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 816 ni->ni_noise = se->se_noise; 817 if (vap->iv_opmode == IEEE80211_M_STA) { 818 /* NB: only infrastructure mode requires an associd */ 819 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 820 } 821 822 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 823 ieee80211_ies_expand(&ni->ni_ies); 824#ifdef IEEE80211_SUPPORT_SUPERG 825 if (ni->ni_ies.ath_ie != NULL) 826 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 827#endif 828 if (ni->ni_ies.htcap_ie != NULL) 829 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 830 if (ni->ni_ies.htinfo_ie != NULL) 831 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 832#ifdef IEEE80211_SUPPORT_MESH 833 if (ni->ni_ies.meshid_ie != NULL) 834 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 835#endif 836#ifdef IEEE80211_SUPPORT_TDMA 837 if (ni->ni_ies.tdma_ie != NULL) 838 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 839#endif 840 } 841 842 vap->iv_dtim_period = se->se_dtimperiod; 843 vap->iv_dtim_count = 0; 844 845 /* NB: must be after ni_chan is setup */ 846 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 847 IEEE80211_F_DOSORT); 848 if (ieee80211_iserp_rateset(&ni->ni_rates)) 849 ni->ni_flags |= IEEE80211_NODE_ERP; 850 851 /* 852 * Setup HT state for this node if it's available, otherwise 853 * non-STA modes won't pick this state up. 854 * 855 * For IBSS and related modes that don't go through an 856 * association request/response, the only appropriate place 857 * to setup the HT state is here. 858 */ 859 if (ni->ni_ies.htinfo_ie != NULL && 860 ni->ni_ies.htcap_ie != NULL && 861 vap->iv_flags_ht & IEEE80211_FHT_HT) { 862 ieee80211_ht_node_init(ni); 863 ieee80211_ht_updateparams(ni, 864 ni->ni_ies.htcap_ie, 865 ni->ni_ies.htinfo_ie); 866 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 867 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 868 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 869 } 870 /* XXX else check for ath FF? */ 871 /* XXX QoS? Difficult given that WME config is specific to a master */ 872 873 ieee80211_node_setuptxparms(ni); 874 ieee80211_ratectl_node_init(ni); 875 876 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 877} 878 879/* 880 * Leave the specified IBSS/BSS network. The node is assumed to 881 * be passed in with a held reference. 882 */ 883void 884ieee80211_sta_leave(struct ieee80211_node *ni) 885{ 886 struct ieee80211com *ic = ni->ni_ic; 887 888 ic->ic_node_cleanup(ni); 889 ieee80211_notify_node_leave(ni); 890} 891 892/* 893 * Send a deauthenticate frame and drop the station. 894 */ 895void 896ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 897{ 898 /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ 899 ieee80211_ref_node(ni); 900 if (ni->ni_associd != 0) 901 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 902 ieee80211_node_leave(ni); 903 ieee80211_free_node(ni); 904} 905 906static struct ieee80211_node * 907node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 908{ 909 struct ieee80211_node *ni; 910 911 ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), 912 M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 913 return ni; 914} 915 916/* 917 * Initialize an ie blob with the specified data. If previous 918 * data exists re-use the data block. As a side effect we clear 919 * all references to specific ie's; the caller is required to 920 * recalculate them. 921 */ 922int 923ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 924{ 925 /* NB: assumes data+len are the last fields */ 926 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 927 if (ies->data != NULL && ies->len != len) { 928 /* data size changed */ 929 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 930 ies->data = NULL; 931 } 932 if (ies->data == NULL) { 933 ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, 934 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 935 if (ies->data == NULL) { 936 ies->len = 0; 937 /* NB: pointers have already been zero'd above */ 938 return 0; 939 } 940 } 941 memcpy(ies->data, data, len); 942 ies->len = len; 943 return 1; 944} 945 946/* 947 * Reclaim storage for an ie blob. 948 */ 949void 950ieee80211_ies_cleanup(struct ieee80211_ies *ies) 951{ 952 if (ies->data != NULL) 953 IEEE80211_FREE(ies->data, M_80211_NODE_IE); 954} 955 956/* 957 * Expand an ie blob data contents and to fillin individual 958 * ie pointers. The data blob is assumed to be well-formed; 959 * we don't do any validity checking of ie lengths. 960 */ 961void 962ieee80211_ies_expand(struct ieee80211_ies *ies) 963{ 964 uint8_t *ie; 965 int ielen; 966 967 ie = ies->data; 968 ielen = ies->len; 969 while (ielen > 0) { 970 switch (ie[0]) { 971 case IEEE80211_ELEMID_VENDOR: 972 if (iswpaoui(ie)) 973 ies->wpa_ie = ie; 974 else if (iswmeoui(ie)) 975 ies->wme_ie = ie; 976#ifdef IEEE80211_SUPPORT_SUPERG 977 else if (isatherosoui(ie)) 978 ies->ath_ie = ie; 979#endif 980#ifdef IEEE80211_SUPPORT_TDMA 981 else if (istdmaoui(ie)) 982 ies->tdma_ie = ie; 983#endif 984 break; 985 case IEEE80211_ELEMID_RSN: 986 ies->rsn_ie = ie; 987 break; 988 case IEEE80211_ELEMID_HTCAP: 989 ies->htcap_ie = ie; 990 break; 991 case IEEE80211_ELEMID_HTINFO: 992 ies->htinfo_ie = ie; 993 break; 994#ifdef IEEE80211_SUPPORT_MESH 995 case IEEE80211_ELEMID_MESHID: 996 ies->meshid_ie = ie; 997 break; 998#endif 999 } 1000 ielen -= 2 + ie[1]; 1001 ie += 2 + ie[1]; 1002 } 1003} 1004 1005/* 1006 * Reclaim any resources in a node and reset any critical 1007 * state. Typically nodes are free'd immediately after, 1008 * but in some cases the storage may be reused so we need 1009 * to insure consistent state (should probably fix that). 1010 */ 1011static void 1012node_cleanup(struct ieee80211_node *ni) 1013{ 1014 struct ieee80211vap *vap = ni->ni_vap; 1015 struct ieee80211com *ic = ni->ni_ic; 1016 int i; 1017 1018 /* NB: preserve ni_table */ 1019 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 1020 if (vap->iv_opmode != IEEE80211_M_STA) 1021 vap->iv_ps_sta--; 1022 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 1023 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 1024 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1025 } 1026 /* 1027 * Cleanup any HT-related state. 1028 */ 1029 if (ni->ni_flags & IEEE80211_NODE_HT) 1030 ieee80211_ht_node_cleanup(ni); 1031#ifdef IEEE80211_SUPPORT_SUPERG 1032 /* Always do FF node cleanup; for A-MSDU */ 1033 ieee80211_ff_node_cleanup(ni); 1034#endif 1035#ifdef IEEE80211_SUPPORT_MESH 1036 /* 1037 * Cleanup any mesh-related state. 1038 */ 1039 if (vap->iv_opmode == IEEE80211_M_MBSS) 1040 ieee80211_mesh_node_cleanup(ni); 1041#endif 1042 /* 1043 * Clear any staging queue entries. 1044 */ 1045 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1046 1047 /* 1048 * Clear AREF flag that marks the authorization refcnt bump 1049 * has happened. This is probably not needed as the node 1050 * should always be removed from the table so not found but 1051 * do it just in case. 1052 * Likewise clear the ASSOCID flag as these flags are intended 1053 * to be managed in tandem. 1054 */ 1055 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1056 1057 /* 1058 * Drain power save queue and, if needed, clear TIM. 1059 */ 1060 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1061 vap->iv_set_tim(ni, 0); 1062 1063 ni->ni_associd = 0; 1064 if (ni->ni_challenge != NULL) { 1065 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1066 ni->ni_challenge = NULL; 1067 } 1068 /* 1069 * Preserve SSID, WPA, and WME ie's so the bss node is 1070 * reusable during a re-auth/re-assoc state transition. 1071 * If we remove these data they will not be recreated 1072 * because they come from a probe-response or beacon frame 1073 * which cannot be expected prior to the association-response. 1074 * This should not be an issue when operating in other modes 1075 * as stations leaving always go through a full state transition 1076 * which will rebuild this state. 1077 * 1078 * XXX does this leave us open to inheriting old state? 1079 */ 1080 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1081 if (ni->ni_rxfrag[i] != NULL) { 1082 m_freem(ni->ni_rxfrag[i]); 1083 ni->ni_rxfrag[i] = NULL; 1084 } 1085 /* 1086 * Must be careful here to remove any key map entry w/o a LOR. 1087 */ 1088 ieee80211_node_delucastkey(ni); 1089} 1090 1091static void 1092node_free(struct ieee80211_node *ni) 1093{ 1094 struct ieee80211com *ic = ni->ni_ic; 1095 1096 ieee80211_ratectl_node_deinit(ni); 1097 ic->ic_node_cleanup(ni); 1098 ieee80211_ies_cleanup(&ni->ni_ies); 1099 ieee80211_psq_cleanup(&ni->ni_psq); 1100 IEEE80211_FREE(ni, M_80211_NODE); 1101} 1102 1103static void 1104node_age(struct ieee80211_node *ni) 1105{ 1106 struct ieee80211vap *vap = ni->ni_vap; 1107 1108 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1109 1110 /* 1111 * Age frames on the power save queue. 1112 */ 1113 if (ieee80211_node_psq_age(ni) != 0 && 1114 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1115 vap->iv_set_tim(ni, 0); 1116 /* 1117 * Age out HT resources (e.g. frames on the 1118 * A-MPDU reorder queues). 1119 */ 1120 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1121 ieee80211_ht_node_age(ni); 1122} 1123 1124static int8_t 1125node_getrssi(const struct ieee80211_node *ni) 1126{ 1127 uint32_t avgrssi = ni->ni_avgrssi; 1128 int32_t rssi; 1129 1130 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1131 return 0; 1132 rssi = IEEE80211_RSSI_GET(avgrssi); 1133 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1134} 1135 1136static void 1137node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1138{ 1139 *rssi = node_getrssi(ni); 1140 *noise = ni->ni_noise; 1141} 1142 1143static void 1144node_getmimoinfo(const struct ieee80211_node *ni, 1145 struct ieee80211_mimo_info *info) 1146{ 1147 int i; 1148 uint32_t avgrssi; 1149 int32_t rssi; 1150 1151 bzero(info, sizeof(*info)); 1152 1153 for (i = 0; i < ni->ni_mimo_chains; i++) { 1154 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1155 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1156 info->rssi[i] = 0; 1157 } else { 1158 rssi = IEEE80211_RSSI_GET(avgrssi); 1159 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1160 } 1161 info->noise[i] = ni->ni_mimo_noise_ctl[i]; 1162 } 1163 1164 /* XXX ext radios? */ 1165 1166 /* XXX EVM? */ 1167} 1168 1169struct ieee80211_node * 1170ieee80211_alloc_node(struct ieee80211_node_table *nt, 1171 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1172{ 1173 struct ieee80211com *ic = nt->nt_ic; 1174 struct ieee80211_node *ni; 1175 int hash; 1176 1177 ni = ic->ic_node_alloc(vap, macaddr); 1178 if (ni == NULL) { 1179 vap->iv_stats.is_rx_nodealloc++; 1180 return NULL; 1181 } 1182 1183 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1184 "%s %p<%s> in %s table\n", __func__, ni, 1185 ether_sprintf(macaddr), nt->nt_name); 1186 1187 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1188 hash = IEEE80211_NODE_HASH(ic, macaddr); 1189 ieee80211_node_initref(ni); /* mark referenced */ 1190 ni->ni_chan = IEEE80211_CHAN_ANYC; 1191 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1192 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1193 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1194 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1195 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1196 ni->ni_inact_reload = nt->nt_inact_init; 1197 ni->ni_inact = ni->ni_inact_reload; 1198 ni->ni_ath_defkeyix = 0x7fff; 1199 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1200#ifdef IEEE80211_SUPPORT_MESH 1201 if (vap->iv_opmode == IEEE80211_M_MBSS) 1202 ieee80211_mesh_node_init(vap, ni); 1203#endif 1204 IEEE80211_NODE_LOCK(nt); 1205 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1206 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1207 ni->ni_table = nt; 1208 ni->ni_vap = vap; 1209 ni->ni_ic = ic; 1210 IEEE80211_NODE_UNLOCK(nt); 1211 1212 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1213 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1214 1215 ieee80211_ratectl_node_init(ni); 1216 1217 return ni; 1218} 1219 1220/* 1221 * Craft a temporary node suitable for sending a management frame 1222 * to the specified station. We craft only as much state as we 1223 * need to do the work since the node will be immediately reclaimed 1224 * once the send completes. 1225 */ 1226struct ieee80211_node * 1227ieee80211_tmp_node(struct ieee80211vap *vap, 1228 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1229{ 1230 struct ieee80211com *ic = vap->iv_ic; 1231 struct ieee80211_node *ni; 1232 1233 ni = ic->ic_node_alloc(vap, macaddr); 1234 if (ni != NULL) { 1235 struct ieee80211_node *bss = vap->iv_bss; 1236 1237 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1238 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1239 1240 ni->ni_table = NULL; /* NB: pedantic */ 1241 ni->ni_ic = ic; /* NB: needed to set channel */ 1242 ni->ni_vap = vap; 1243 1244 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1245 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1246 ieee80211_node_initref(ni); /* mark referenced */ 1247 /* NB: required by ieee80211_fix_rate */ 1248 ieee80211_node_set_chan(ni, bss->ni_chan); 1249 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1250 IEEE80211_KEYIX_NONE); 1251 ni->ni_txpower = bss->ni_txpower; 1252 /* XXX optimize away */ 1253 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1254 1255 ieee80211_ratectl_node_init(ni); 1256 } else { 1257 /* XXX msg */ 1258 vap->iv_stats.is_rx_nodealloc++; 1259 } 1260 return ni; 1261} 1262 1263struct ieee80211_node * 1264ieee80211_dup_bss(struct ieee80211vap *vap, 1265 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1266{ 1267 struct ieee80211com *ic = vap->iv_ic; 1268 struct ieee80211_node *ni; 1269 1270 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1271 if (ni != NULL) { 1272 struct ieee80211_node *bss = vap->iv_bss; 1273 /* 1274 * Inherit from iv_bss. 1275 */ 1276 copy_bss(ni, bss); 1277 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1278 ieee80211_node_set_chan(ni, bss->ni_chan); 1279 } 1280 return ni; 1281} 1282 1283/* 1284 * Create a bss node for a legacy WDS vap. The far end does 1285 * not associate so we just create create a new node and 1286 * simulate an association. The caller is responsible for 1287 * installing the node as the bss node and handling any further 1288 * setup work like authorizing the port. 1289 */ 1290struct ieee80211_node * 1291ieee80211_node_create_wds(struct ieee80211vap *vap, 1292 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1293{ 1294 struct ieee80211com *ic = vap->iv_ic; 1295 struct ieee80211_node *ni; 1296 1297 /* XXX check if node already in sta table? */ 1298 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1299 if (ni != NULL) { 1300 ni->ni_wdsvap = vap; 1301 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1302 /* 1303 * Inherit any manually configured settings. 1304 */ 1305 copy_bss(ni, vap->iv_bss); 1306 ieee80211_node_set_chan(ni, chan); 1307 /* NB: propagate ssid so available to WPA supplicant */ 1308 ni->ni_esslen = vap->iv_des_ssid[0].len; 1309 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1310 /* NB: no associd for peer */ 1311 /* 1312 * There are no management frames to use to 1313 * discover neighbor capabilities, so blindly 1314 * propagate the local configuration. 1315 */ 1316 if (vap->iv_flags & IEEE80211_F_WME) 1317 ni->ni_flags |= IEEE80211_NODE_QOS; 1318#ifdef IEEE80211_SUPPORT_SUPERG 1319 if (vap->iv_flags & IEEE80211_F_FF) 1320 ni->ni_flags |= IEEE80211_NODE_FF; 1321#endif 1322 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1323 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1324 /* 1325 * Device is HT-capable and HT is enabled for 1326 * the vap; setup HT operation. On return 1327 * ni_chan will be adjusted to an HT channel. 1328 */ 1329 ieee80211_ht_wds_init(ni); 1330 } else { 1331 struct ieee80211_channel *c = ni->ni_chan; 1332 /* 1333 * Force a legacy channel to be used. 1334 */ 1335 c = ieee80211_find_channel(ic, 1336 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1337 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1338 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1339 ni->ni_chan = c; 1340 } 1341 } 1342 return ni; 1343} 1344 1345struct ieee80211_node * 1346#ifdef IEEE80211_DEBUG_REFCNT 1347ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1348 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1349#else 1350ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1351 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1352#endif 1353{ 1354 struct ieee80211_node *ni; 1355 int hash; 1356 1357 IEEE80211_NODE_LOCK_ASSERT(nt); 1358 1359 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1360 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1361 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1362 ieee80211_ref_node(ni); /* mark referenced */ 1363#ifdef IEEE80211_DEBUG_REFCNT 1364 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1365 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1366 func, line, 1367 ni, ether_sprintf(ni->ni_macaddr), 1368 ieee80211_node_refcnt(ni)); 1369#endif 1370 return ni; 1371 } 1372 } 1373 return NULL; 1374} 1375 1376struct ieee80211_node * 1377#ifdef IEEE80211_DEBUG_REFCNT 1378ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1379 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1380#else 1381ieee80211_find_node(struct ieee80211_node_table *nt, 1382 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1383#endif 1384{ 1385 struct ieee80211_node *ni; 1386 1387 IEEE80211_NODE_LOCK(nt); 1388 ni = ieee80211_find_node_locked(nt, macaddr); 1389 IEEE80211_NODE_UNLOCK(nt); 1390 return ni; 1391} 1392 1393struct ieee80211_node * 1394#ifdef IEEE80211_DEBUG_REFCNT 1395ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1396 const struct ieee80211vap *vap, 1397 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1398#else 1399ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1400 const struct ieee80211vap *vap, 1401 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1402#endif 1403{ 1404 struct ieee80211_node *ni; 1405 int hash; 1406 1407 IEEE80211_NODE_LOCK_ASSERT(nt); 1408 1409 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1410 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1411 if (ni->ni_vap == vap && 1412 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1413 ieee80211_ref_node(ni); /* mark referenced */ 1414#ifdef IEEE80211_DEBUG_REFCNT 1415 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1416 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1417 func, line, 1418 ni, ether_sprintf(ni->ni_macaddr), 1419 ieee80211_node_refcnt(ni)); 1420#endif 1421 return ni; 1422 } 1423 } 1424 return NULL; 1425} 1426 1427struct ieee80211_node * 1428#ifdef IEEE80211_DEBUG_REFCNT 1429ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1430 const struct ieee80211vap *vap, 1431 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1432#else 1433ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1434 const struct ieee80211vap *vap, 1435 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1436#endif 1437{ 1438 struct ieee80211_node *ni; 1439 1440 IEEE80211_NODE_LOCK(nt); 1441 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1442 IEEE80211_NODE_UNLOCK(nt); 1443 return ni; 1444} 1445 1446/* 1447 * Fake up a node; this handles node discovery in adhoc mode. 1448 * Note that for the driver's benefit we we treat this like 1449 * an association so the driver has an opportunity to setup 1450 * it's private state. 1451 */ 1452struct ieee80211_node * 1453ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1454 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1455{ 1456 struct ieee80211_node *ni; 1457 1458 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1459 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1460 ni = ieee80211_dup_bss(vap, macaddr); 1461 if (ni != NULL) { 1462 struct ieee80211com *ic = vap->iv_ic; 1463 1464 /* XXX no rate negotiation; just dup */ 1465 ni->ni_rates = vap->iv_bss->ni_rates; 1466 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1467 ni->ni_flags |= IEEE80211_NODE_ERP; 1468 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1469 /* 1470 * In adhoc demo mode there are no management 1471 * frames to use to discover neighbor capabilities, 1472 * so blindly propagate the local configuration 1473 * so we can do interesting things (e.g. use 1474 * WME to disable ACK's). 1475 */ 1476 if (vap->iv_flags & IEEE80211_F_WME) 1477 ni->ni_flags |= IEEE80211_NODE_QOS; 1478#ifdef IEEE80211_SUPPORT_SUPERG 1479 if (vap->iv_flags & IEEE80211_F_FF) 1480 ni->ni_flags |= IEEE80211_NODE_FF; 1481#endif 1482 } 1483 ieee80211_node_setuptxparms(ni); 1484 ieee80211_ratectl_node_init(ni); 1485 if (ic->ic_newassoc != NULL) 1486 ic->ic_newassoc(ni, 1); 1487 /* XXX not right for 802.1x/WPA */ 1488 ieee80211_node_authorize(ni); 1489 } 1490 return ni; 1491} 1492 1493void 1494ieee80211_init_neighbor(struct ieee80211_node *ni, 1495 const struct ieee80211_frame *wh, 1496 const struct ieee80211_scanparams *sp) 1497{ 1498 int do_ht_setup = 0; 1499 1500 ni->ni_esslen = sp->ssid[1]; 1501 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1502 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1503 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1504 ni->ni_intval = sp->bintval; 1505 ni->ni_capinfo = sp->capinfo; 1506 ni->ni_chan = ni->ni_ic->ic_curchan; 1507 ni->ni_fhdwell = sp->fhdwell; 1508 ni->ni_fhindex = sp->fhindex; 1509 ni->ni_erp = sp->erp; 1510 ni->ni_timoff = sp->timoff; 1511#ifdef IEEE80211_SUPPORT_MESH 1512 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1513 ieee80211_mesh_init_neighbor(ni, wh, sp); 1514#endif 1515 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1516 ieee80211_ies_expand(&ni->ni_ies); 1517 if (ni->ni_ies.wme_ie != NULL) 1518 ni->ni_flags |= IEEE80211_NODE_QOS; 1519 else 1520 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1521#ifdef IEEE80211_SUPPORT_SUPERG 1522 if (ni->ni_ies.ath_ie != NULL) 1523 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1524#endif 1525 if (ni->ni_ies.htcap_ie != NULL) 1526 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1527 if (ni->ni_ies.htinfo_ie != NULL) 1528 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1529 1530 if ((ni->ni_ies.htcap_ie != NULL) && 1531 (ni->ni_ies.htinfo_ie != NULL) && 1532 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1533 do_ht_setup = 1; 1534 } 1535 } 1536 1537 /* NB: must be after ni_chan is setup */ 1538 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1539 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1540 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1541 1542 /* 1543 * If the neighbor is HT compatible, flip that on. 1544 */ 1545 if (do_ht_setup) { 1546 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1547 "%s: doing HT setup\n", __func__); 1548 ieee80211_ht_node_init(ni); 1549 ieee80211_ht_updateparams(ni, 1550 ni->ni_ies.htcap_ie, 1551 ni->ni_ies.htinfo_ie); 1552 ieee80211_setup_htrates(ni, 1553 ni->ni_ies.htcap_ie, 1554 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1555 ieee80211_setup_basic_htrates(ni, 1556 ni->ni_ies.htinfo_ie); 1557 ieee80211_node_setuptxparms(ni); 1558 ieee80211_ratectl_node_init(ni); 1559 } 1560} 1561 1562/* 1563 * Do node discovery in adhoc mode on receipt of a beacon 1564 * or probe response frame. Note that for the driver's 1565 * benefit we we treat this like an association so the 1566 * driver has an opportunity to setup it's private state. 1567 */ 1568struct ieee80211_node * 1569ieee80211_add_neighbor(struct ieee80211vap *vap, 1570 const struct ieee80211_frame *wh, 1571 const struct ieee80211_scanparams *sp) 1572{ 1573 struct ieee80211_node *ni; 1574 1575 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1576 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1577 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1578 if (ni != NULL) { 1579 struct ieee80211com *ic = vap->iv_ic; 1580 1581 ieee80211_init_neighbor(ni, wh, sp); 1582 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1583 ni->ni_flags |= IEEE80211_NODE_ERP; 1584 ieee80211_node_setuptxparms(ni); 1585 ieee80211_ratectl_node_init(ni); 1586 if (ic->ic_newassoc != NULL) 1587 ic->ic_newassoc(ni, 1); 1588 /* XXX not right for 802.1x/WPA */ 1589 ieee80211_node_authorize(ni); 1590 } 1591 return ni; 1592} 1593 1594#define IS_PROBEREQ(wh) \ 1595 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1596 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1597#define IS_BCAST_PROBEREQ(wh) \ 1598 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1599 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1600 1601static __inline struct ieee80211_node * 1602_find_rxnode(struct ieee80211_node_table *nt, 1603 const struct ieee80211_frame_min *wh) 1604{ 1605 if (IS_BCAST_PROBEREQ(wh)) 1606 return NULL; /* spam bcast probe req to all vap's */ 1607 return ieee80211_find_node_locked(nt, wh->i_addr2); 1608} 1609 1610/* 1611 * Locate the node for sender, track state, and then pass the 1612 * (referenced) node up to the 802.11 layer for its use. Note 1613 * we can return NULL if the sender is not in the table. 1614 */ 1615struct ieee80211_node * 1616#ifdef IEEE80211_DEBUG_REFCNT 1617ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1618 const struct ieee80211_frame_min *wh, const char *func, int line) 1619#else 1620ieee80211_find_rxnode(struct ieee80211com *ic, 1621 const struct ieee80211_frame_min *wh) 1622#endif 1623{ 1624 struct ieee80211_node_table *nt; 1625 struct ieee80211_node *ni; 1626 1627 nt = &ic->ic_sta; 1628 IEEE80211_NODE_LOCK(nt); 1629 ni = _find_rxnode(nt, wh); 1630 IEEE80211_NODE_UNLOCK(nt); 1631 1632 return ni; 1633} 1634 1635/* 1636 * Like ieee80211_find_rxnode but use the supplied h/w 1637 * key index as a hint to locate the node in the key 1638 * mapping table. If an entry is present at the key 1639 * index we return it; otherwise do a normal lookup and 1640 * update the mapping table if the station has a unicast 1641 * key assigned to it. 1642 */ 1643struct ieee80211_node * 1644#ifdef IEEE80211_DEBUG_REFCNT 1645ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1646 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1647 const char *func, int line) 1648#else 1649ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1650 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1651#endif 1652{ 1653 struct ieee80211_node_table *nt; 1654 struct ieee80211_node *ni; 1655 1656 nt = &ic->ic_sta; 1657 IEEE80211_NODE_LOCK(nt); 1658 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1659 ni = nt->nt_keyixmap[keyix]; 1660 else 1661 ni = NULL; 1662 if (ni == NULL) { 1663 ni = _find_rxnode(nt, wh); 1664 if (ni != NULL && nt->nt_keyixmap != NULL) { 1665 /* 1666 * If the station has a unicast key cache slot 1667 * assigned update the key->node mapping table. 1668 */ 1669 keyix = ni->ni_ucastkey.wk_rxkeyix; 1670 /* XXX can keyixmap[keyix] != NULL? */ 1671 if (keyix < nt->nt_keyixmax && 1672 nt->nt_keyixmap[keyix] == NULL) { 1673 IEEE80211_DPRINTF(ni->ni_vap, 1674 IEEE80211_MSG_NODE, 1675 "%s: add key map entry %p<%s> refcnt %d\n", 1676 __func__, ni, ether_sprintf(ni->ni_macaddr), 1677 ieee80211_node_refcnt(ni)+1); 1678 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1679 } 1680 } 1681 } else { 1682 if (IS_BCAST_PROBEREQ(wh)) 1683 ni = NULL; /* spam bcast probe req to all vap's */ 1684 else 1685 ieee80211_ref_node(ni); 1686 } 1687 IEEE80211_NODE_UNLOCK(nt); 1688 1689 return ni; 1690} 1691#undef IS_BCAST_PROBEREQ 1692#undef IS_PROBEREQ 1693 1694/* 1695 * Return a reference to the appropriate node for sending 1696 * a data frame. This handles node discovery in adhoc networks. 1697 */ 1698struct ieee80211_node * 1699#ifdef IEEE80211_DEBUG_REFCNT 1700ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1701 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1702 const char *func, int line) 1703#else 1704ieee80211_find_txnode(struct ieee80211vap *vap, 1705 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1706#endif 1707{ 1708 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1709 struct ieee80211_node *ni; 1710 1711 /* 1712 * The destination address should be in the node table 1713 * unless this is a multicast/broadcast frame. We can 1714 * also optimize station mode operation, all frames go 1715 * to the bss node. 1716 */ 1717 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1718 IEEE80211_NODE_LOCK(nt); 1719 if (vap->iv_opmode == IEEE80211_M_STA || 1720 vap->iv_opmode == IEEE80211_M_WDS || 1721 IEEE80211_IS_MULTICAST(macaddr)) 1722 ni = ieee80211_ref_node(vap->iv_bss); 1723 else 1724 ni = ieee80211_find_node_locked(nt, macaddr); 1725 IEEE80211_NODE_UNLOCK(nt); 1726 1727 if (ni == NULL) { 1728 if (vap->iv_opmode == IEEE80211_M_IBSS || 1729 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1730 /* 1731 * In adhoc mode cons up a node for the destination. 1732 * Note that we need an additional reference for the 1733 * caller to be consistent with 1734 * ieee80211_find_node_locked. 1735 */ 1736 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1737 if (ni != NULL) 1738 (void) ieee80211_ref_node(ni); 1739 } else { 1740 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1741 "no node, discard frame (%s)", __func__); 1742 vap->iv_stats.is_tx_nonode++; 1743 } 1744 } 1745 return ni; 1746} 1747 1748static void 1749_ieee80211_free_node(struct ieee80211_node *ni) 1750{ 1751 struct ieee80211_node_table *nt = ni->ni_table; 1752 1753 /* 1754 * NB: careful about referencing the vap as it may be 1755 * gone if the last reference was held by a driver. 1756 * We know the com will always be present so it's safe 1757 * to use ni_ic below to reclaim resources. 1758 */ 1759#if 0 1760 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1761 "%s %p<%s> in %s table\n", __func__, ni, 1762 ether_sprintf(ni->ni_macaddr), 1763 nt != NULL ? nt->nt_name : "<gone>"); 1764#endif 1765 if (ni->ni_associd != 0) { 1766 struct ieee80211vap *vap = ni->ni_vap; 1767 if (vap->iv_aid_bitmap != NULL) 1768 IEEE80211_AID_CLR(vap, ni->ni_associd); 1769 } 1770 if (nt != NULL) { 1771 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1772 LIST_REMOVE(ni, ni_hash); 1773 } 1774 ni->ni_ic->ic_node_free(ni); 1775} 1776 1777/* 1778 * Clear any entry in the unicast key mapping table. 1779 */ 1780static int 1781node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1782{ 1783 ieee80211_keyix keyix; 1784 1785 keyix = ni->ni_ucastkey.wk_rxkeyix; 1786 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1787 nt->nt_keyixmap[keyix] == ni) { 1788 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1789 "%s: %p<%s> clear key map entry %u\n", 1790 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1791 nt->nt_keyixmap[keyix] = NULL; 1792 ieee80211_node_decref(ni); 1793 return 1; 1794 } 1795 1796 return 0; 1797} 1798 1799void 1800#ifdef IEEE80211_DEBUG_REFCNT 1801ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1802#else 1803ieee80211_free_node(struct ieee80211_node *ni) 1804#endif 1805{ 1806 struct ieee80211_node_table *nt = ni->ni_table; 1807 1808#ifdef IEEE80211_DEBUG_REFCNT 1809 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1810 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1811 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1812#endif 1813 if (nt != NULL) { 1814 IEEE80211_NODE_LOCK(nt); 1815 if (ieee80211_node_dectestref(ni)) { 1816 /* 1817 * Last reference, reclaim state. 1818 */ 1819 _ieee80211_free_node(ni); 1820 } else if (ieee80211_node_refcnt(ni) == 1) 1821 if (node_clear_keyixmap(nt, ni)) 1822 _ieee80211_free_node(ni); 1823 IEEE80211_NODE_UNLOCK(nt); 1824 } else { 1825 if (ieee80211_node_dectestref(ni)) 1826 _ieee80211_free_node(ni); 1827 } 1828} 1829 1830/* 1831 * Reclaim a unicast key and clear any key cache state. 1832 */ 1833int 1834ieee80211_node_delucastkey(struct ieee80211_node *ni) 1835{ 1836 struct ieee80211com *ic = ni->ni_ic; 1837 struct ieee80211_node_table *nt = &ic->ic_sta; 1838 struct ieee80211_node *nikey; 1839 ieee80211_keyix keyix; 1840 int isowned, status; 1841 1842 /* 1843 * NB: We must beware of LOR here; deleting the key 1844 * can cause the crypto layer to block traffic updates 1845 * which can generate a LOR against the node table lock; 1846 * grab it here and stash the key index for our use below. 1847 * 1848 * Must also beware of recursion on the node table lock. 1849 * When called from node_cleanup we may already have 1850 * the node table lock held. Unfortunately there's no 1851 * way to separate out this path so we must do this 1852 * conditionally. 1853 */ 1854 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1855 if (!isowned) 1856 IEEE80211_NODE_LOCK(nt); 1857 nikey = NULL; 1858 status = 1; /* NB: success */ 1859 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1860 keyix = ni->ni_ucastkey.wk_rxkeyix; 1861 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1862 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1863 nikey = nt->nt_keyixmap[keyix]; 1864 nt->nt_keyixmap[keyix] = NULL; 1865 } 1866 } 1867 if (!isowned) 1868 IEEE80211_NODE_UNLOCK(nt); 1869 1870 if (nikey != NULL) { 1871 KASSERT(nikey == ni, 1872 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1873 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1874 "%s: delete key map entry %p<%s> refcnt %d\n", 1875 __func__, ni, ether_sprintf(ni->ni_macaddr), 1876 ieee80211_node_refcnt(ni)-1); 1877 ieee80211_free_node(ni); 1878 } 1879 return status; 1880} 1881 1882/* 1883 * Reclaim a node. If this is the last reference count then 1884 * do the normal free work. Otherwise remove it from the node 1885 * table and mark it gone by clearing the back-reference. 1886 */ 1887static void 1888node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1889{ 1890 1891 IEEE80211_NODE_LOCK_ASSERT(nt); 1892 1893 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1894 "%s: remove %p<%s> from %s table, refcnt %d\n", 1895 __func__, ni, ether_sprintf(ni->ni_macaddr), 1896 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1897 /* 1898 * Clear any entry in the unicast key mapping table. 1899 * We need to do it here so rx lookups don't find it 1900 * in the mapping table even if it's not in the hash 1901 * table. We cannot depend on the mapping table entry 1902 * being cleared because the node may not be free'd. 1903 */ 1904 (void)node_clear_keyixmap(nt, ni); 1905 if (!ieee80211_node_dectestref(ni)) { 1906 /* 1907 * Other references are present, just remove the 1908 * node from the table so it cannot be found. When 1909 * the references are dropped storage will be 1910 * reclaimed. 1911 */ 1912 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1913 LIST_REMOVE(ni, ni_hash); 1914 ni->ni_table = NULL; /* clear reference */ 1915 } else 1916 _ieee80211_free_node(ni); 1917} 1918 1919/* 1920 * Node table support. 1921 */ 1922 1923static void 1924ieee80211_node_table_init(struct ieee80211com *ic, 1925 struct ieee80211_node_table *nt, 1926 const char *name, int inact, int keyixmax) 1927{ 1928 1929 nt->nt_ic = ic; 1930 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); 1931 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ic->ic_name); 1932 TAILQ_INIT(&nt->nt_node); 1933 nt->nt_name = name; 1934 nt->nt_scangen = 1; 1935 nt->nt_inact_init = inact; 1936 nt->nt_keyixmax = keyixmax; 1937 if (nt->nt_keyixmax > 0) { 1938 nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( 1939 keyixmax * sizeof(struct ieee80211_node *), 1940 M_80211_NODE, 1941 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 1942 if (nt->nt_keyixmap == NULL) 1943 ic_printf(ic, 1944 "Cannot allocate key index map with %u entries\n", 1945 keyixmax); 1946 } else 1947 nt->nt_keyixmap = NULL; 1948} 1949 1950static void 1951ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1952 struct ieee80211vap *match) 1953{ 1954 struct ieee80211_node *ni, *next; 1955 1956 IEEE80211_NODE_LOCK(nt); 1957 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1958 if (match != NULL && ni->ni_vap != match) 1959 continue; 1960 /* XXX can this happen? if so need's work */ 1961 if (ni->ni_associd != 0) { 1962 struct ieee80211vap *vap = ni->ni_vap; 1963 1964 if (vap->iv_auth->ia_node_leave != NULL) 1965 vap->iv_auth->ia_node_leave(ni); 1966 if (vap->iv_aid_bitmap != NULL) 1967 IEEE80211_AID_CLR(vap, ni->ni_associd); 1968 } 1969 ni->ni_wdsvap = NULL; /* clear reference */ 1970 node_reclaim(nt, ni); 1971 } 1972 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1973 /* 1974 * Make a separate pass to clear references to this vap 1975 * held by DWDS entries. They will not be matched above 1976 * because ni_vap will point to the ap vap but we still 1977 * need to clear ni_wdsvap when the WDS vap is destroyed 1978 * and/or reset. 1979 */ 1980 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1981 if (ni->ni_wdsvap == match) 1982 ni->ni_wdsvap = NULL; 1983 } 1984 IEEE80211_NODE_UNLOCK(nt); 1985} 1986 1987static void 1988ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1989{ 1990 ieee80211_node_table_reset(nt, NULL); 1991 if (nt->nt_keyixmap != NULL) { 1992#ifdef DIAGNOSTIC 1993 /* XXX verify all entries are NULL */ 1994 int i; 1995 for (i = 0; i < nt->nt_keyixmax; i++) 1996 if (nt->nt_keyixmap[i] != NULL) 1997 printf("%s: %s[%u] still active\n", __func__, 1998 nt->nt_name, i); 1999#endif 2000 IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); 2001 nt->nt_keyixmap = NULL; 2002 } 2003 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 2004 IEEE80211_NODE_LOCK_DESTROY(nt); 2005} 2006 2007/* 2008 * Timeout inactive stations and do related housekeeping. 2009 * Note that we cannot hold the node lock while sending a 2010 * frame as this would lead to a LOR. Instead we use a 2011 * generation number to mark nodes that we've scanned and 2012 * drop the lock and restart a scan if we have to time out 2013 * a node. Since we are single-threaded by virtue of 2014 * controlling the inactivity timer we can be sure this will 2015 * process each node only once. 2016 */ 2017static void 2018ieee80211_timeout_stations(struct ieee80211com *ic) 2019{ 2020 struct ieee80211_node_table *nt = &ic->ic_sta; 2021 struct ieee80211vap *vap; 2022 struct ieee80211_node *ni; 2023 int gen = 0; 2024 2025 IEEE80211_NODE_ITERATE_LOCK(nt); 2026 gen = ++nt->nt_scangen; 2027restart: 2028 IEEE80211_NODE_LOCK(nt); 2029 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2030 if (ni->ni_scangen == gen) /* previously handled */ 2031 continue; 2032 ni->ni_scangen = gen; 2033 /* 2034 * Ignore entries for which have yet to receive an 2035 * authentication frame. These are transient and 2036 * will be reclaimed when the last reference to them 2037 * goes away (when frame xmits complete). 2038 */ 2039 vap = ni->ni_vap; 2040 /* 2041 * Only process stations when in RUN state. This 2042 * insures, for example, that we don't timeout an 2043 * inactive station during CAC. Note that CSA state 2044 * is actually handled in ieee80211_node_timeout as 2045 * it applies to more than timeout processing. 2046 */ 2047 if (vap->iv_state != IEEE80211_S_RUN) 2048 continue; 2049 /* XXX can vap be NULL? */ 2050 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2051 vap->iv_opmode == IEEE80211_M_STA) && 2052 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2053 continue; 2054 /* 2055 * Free fragment if not needed anymore 2056 * (last fragment older than 1s). 2057 * XXX doesn't belong here, move to node_age 2058 */ 2059 if (ni->ni_rxfrag[0] != NULL && 2060 ticks > ni->ni_rxfragstamp + hz) { 2061 m_freem(ni->ni_rxfrag[0]); 2062 ni->ni_rxfrag[0] = NULL; 2063 } 2064 if (ni->ni_inact > 0) { 2065 ni->ni_inact--; 2066 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2067 "%s: inact %u inact_reload %u nrates %u", 2068 __func__, ni->ni_inact, ni->ni_inact_reload, 2069 ni->ni_rates.rs_nrates); 2070 } 2071 /* 2072 * Special case ourself; we may be idle for extended periods 2073 * of time and regardless reclaiming our state is wrong. 2074 * XXX run ic_node_age 2075 */ 2076 if (ni == vap->iv_bss) 2077 continue; 2078 if (ni->ni_associd != 0 || 2079 (vap->iv_opmode == IEEE80211_M_IBSS || 2080 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2081 /* 2082 * Age/drain resources held by the station. 2083 */ 2084 ic->ic_node_age(ni); 2085 /* 2086 * Probe the station before time it out. We 2087 * send a null data frame which may not be 2088 * universally supported by drivers (need it 2089 * for ps-poll support so it should be...). 2090 * 2091 * XXX don't probe the station unless we've 2092 * received a frame from them (and have 2093 * some idea of the rates they are capable 2094 * of); this will get fixed more properly 2095 * soon with better handling of the rate set. 2096 */ 2097 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2098 (0 < ni->ni_inact && 2099 ni->ni_inact <= vap->iv_inact_probe) && 2100 ni->ni_rates.rs_nrates != 0) { 2101 IEEE80211_NOTE(vap, 2102 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2103 ni, "%s", 2104 "probe station due to inactivity"); 2105 /* 2106 * Grab a reference before unlocking the table 2107 * so the node cannot be reclaimed before we 2108 * send the frame. ieee80211_send_nulldata 2109 * understands we've done this and reclaims the 2110 * ref for us as needed. 2111 */ 2112 ieee80211_ref_node(ni); 2113 IEEE80211_NODE_UNLOCK(nt); 2114 ieee80211_send_nulldata(ni); 2115 /* XXX stat? */ 2116 goto restart; 2117 } 2118 } 2119 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2120 ni->ni_inact <= 0) { 2121 IEEE80211_NOTE(vap, 2122 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2123 "station timed out due to inactivity " 2124 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2125 /* 2126 * Send a deauthenticate frame and drop the station. 2127 * This is somewhat complicated due to reference counts 2128 * and locking. At this point a station will typically 2129 * have a reference count of 1. ieee80211_node_leave 2130 * will do a "free" of the node which will drop the 2131 * reference count. But in the meantime a reference 2132 * wil be held by the deauth frame. The actual reclaim 2133 * of the node will happen either after the tx is 2134 * completed or by ieee80211_node_leave. 2135 * 2136 * Separately we must drop the node lock before sending 2137 * in case the driver takes a lock, as this can result 2138 * in a LOR between the node lock and the driver lock. 2139 */ 2140 ieee80211_ref_node(ni); 2141 IEEE80211_NODE_UNLOCK(nt); 2142 if (ni->ni_associd != 0) { 2143 IEEE80211_SEND_MGMT(ni, 2144 IEEE80211_FC0_SUBTYPE_DEAUTH, 2145 IEEE80211_REASON_AUTH_EXPIRE); 2146 } 2147 ieee80211_node_leave(ni); 2148 ieee80211_free_node(ni); 2149 vap->iv_stats.is_node_timeout++; 2150 goto restart; 2151 } 2152 } 2153 IEEE80211_NODE_UNLOCK(nt); 2154 2155 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2156} 2157 2158/* 2159 * Aggressively reclaim resources. This should be used 2160 * only in a critical situation to reclaim mbuf resources. 2161 */ 2162void 2163ieee80211_drain(struct ieee80211com *ic) 2164{ 2165 struct ieee80211_node_table *nt = &ic->ic_sta; 2166 struct ieee80211vap *vap; 2167 struct ieee80211_node *ni; 2168 2169 IEEE80211_NODE_LOCK(nt); 2170 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2171 /* 2172 * Ignore entries for which have yet to receive an 2173 * authentication frame. These are transient and 2174 * will be reclaimed when the last reference to them 2175 * goes away (when frame xmits complete). 2176 */ 2177 vap = ni->ni_vap; 2178 /* 2179 * Only process stations when in RUN state. This 2180 * insures, for example, that we don't timeout an 2181 * inactive station during CAC. Note that CSA state 2182 * is actually handled in ieee80211_node_timeout as 2183 * it applies to more than timeout processing. 2184 */ 2185 if (vap->iv_state != IEEE80211_S_RUN) 2186 continue; 2187 /* XXX can vap be NULL? */ 2188 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2189 vap->iv_opmode == IEEE80211_M_STA) && 2190 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2191 continue; 2192 /* 2193 * Free fragments. 2194 * XXX doesn't belong here, move to node_drain 2195 */ 2196 if (ni->ni_rxfrag[0] != NULL) { 2197 m_freem(ni->ni_rxfrag[0]); 2198 ni->ni_rxfrag[0] = NULL; 2199 } 2200 /* 2201 * Drain resources held by the station. 2202 */ 2203 ic->ic_node_drain(ni); 2204 } 2205 IEEE80211_NODE_UNLOCK(nt); 2206} 2207 2208/* 2209 * Per-ieee80211com inactivity timer callback. 2210 */ 2211void 2212ieee80211_node_timeout(void *arg) 2213{ 2214 struct ieee80211com *ic = arg; 2215 2216 /* 2217 * Defer timeout processing if a channel switch is pending. 2218 * We typically need to be mute so not doing things that 2219 * might generate frames is good to handle in one place. 2220 * Supressing the station timeout processing may extend the 2221 * lifetime of inactive stations (by not decrementing their 2222 * idle counters) but this should be ok unless the CSA is 2223 * active for an unusually long time. 2224 */ 2225 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2226 ieee80211_scan_timeout(ic); 2227 ieee80211_timeout_stations(ic); 2228 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2229 2230 IEEE80211_LOCK(ic); 2231 ieee80211_erp_timeout(ic); 2232 ieee80211_ht_timeout(ic); 2233 IEEE80211_UNLOCK(ic); 2234 } 2235 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2236 ieee80211_node_timeout, ic); 2237} 2238 2239/* 2240 * Iterate over the node table and return an array of ref'ed nodes. 2241 * 2242 * This is separated out from calling the actual node function so that 2243 * no LORs will occur. 2244 * 2245 * If there are too many nodes (ie, the number of nodes doesn't fit 2246 * within 'max_aid' entries) then the node references will be freed 2247 * and an error will be returned. 2248 * 2249 * The responsibility of allocating and freeing "ni_arr" is up to 2250 * the caller. 2251 */ 2252int 2253ieee80211_iterate_nt(struct ieee80211_node_table *nt, 2254 struct ieee80211_node **ni_arr, uint16_t max_aid) 2255{ 2256 u_int gen; 2257 int i, j, ret; 2258 struct ieee80211_node *ni; 2259 2260 IEEE80211_NODE_ITERATE_LOCK(nt); 2261 IEEE80211_NODE_LOCK(nt); 2262 2263 gen = ++nt->nt_scangen; 2264 i = ret = 0; 2265 2266 /* 2267 * We simply assume here that since the node 2268 * scan generation doesn't change (as 2269 * we are holding both the node table and 2270 * node table iteration locks), we can simply 2271 * assign it to the node here. 2272 */ 2273 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2274 if (i >= max_aid) { 2275 ret = E2BIG; 2276 ic_printf(nt->nt_ic, "Node array overflow: max=%u", 2277 max_aid); 2278 break; 2279 } 2280 ni_arr[i] = ieee80211_ref_node(ni); 2281 ni_arr[i]->ni_scangen = gen; 2282 i++; 2283 } 2284 2285 /* 2286 * It's safe to unlock here. 2287 * 2288 * If we're successful, the list is returned. 2289 * If we're unsuccessful, the list is ignored 2290 * and we remove our references. 2291 * 2292 * This avoids any potential LOR with 2293 * ieee80211_free_node(). 2294 */ 2295 IEEE80211_NODE_UNLOCK(nt); 2296 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2297 2298 /* 2299 * If ret is non-zero, we hit some kind of error. 2300 * Rather than walking some nodes, we'll walk none 2301 * of them. 2302 */ 2303 if (ret) { 2304 for (j = 0; j < i; j++) { 2305 /* ieee80211_free_node() locks by itself */ 2306 ieee80211_free_node(ni_arr[j]); 2307 } 2308 } 2309 2310 return (ret); 2311} 2312 2313/* 2314 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2315 * reference in the source. 2316 * 2317 * Note that this fetches 'max_aid' from the first VAP, rather than finding 2318 * the largest max_aid from all VAPs. 2319 */ 2320void 2321ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2322 ieee80211_iter_func *f, void *arg) 2323{ 2324 struct ieee80211_node **ni_arr; 2325 size_t size; 2326 int i; 2327 uint16_t max_aid; 2328 struct ieee80211vap *vap; 2329 2330 /* Overdoing it default */ 2331 max_aid = IEEE80211_AID_MAX; 2332 2333 /* Handle the case of there being no vaps just yet */ 2334 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps); 2335 if (vap != NULL) 2336 max_aid = vap->iv_max_aid; 2337 2338 size = max_aid * sizeof(struct ieee80211_node *); 2339 ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, 2340 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2341 if (ni_arr == NULL) 2342 return; 2343 2344 /* 2345 * If this fails, the node table won't have any 2346 * valid entries - ieee80211_iterate_nt() frees 2347 * the references to them. So don't try walking 2348 * the table; just skip to the end and free the 2349 * temporary memory. 2350 */ 2351 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0) 2352 goto done; 2353 2354 for (i = 0; i < max_aid; i++) { 2355 if (ni_arr[i] == NULL) /* end of the list */ 2356 break; 2357 (*f)(arg, ni_arr[i]); 2358 /* ieee80211_free_node() locks by itself */ 2359 ieee80211_free_node(ni_arr[i]); 2360 } 2361 2362done: 2363 IEEE80211_FREE(ni_arr, M_80211_NODE); 2364} 2365 2366void 2367ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2368{ 2369 printf("0x%p: mac %s refcnt %d\n", ni, 2370 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2371 printf("\tscangen %u authmode %u flags 0x%x\n", 2372 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2373 printf("\tassocid 0x%x txpower %u vlan %u\n", 2374 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2375 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2376 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2377 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2378 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2379 ni->ni_rxfragstamp); 2380 printf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2381 node_getrssi(ni), ni->ni_noise, 2382 ni->ni_intval, ni->ni_capinfo); 2383 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2384 ether_sprintf(ni->ni_bssid), 2385 ni->ni_esslen, ni->ni_essid, 2386 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2387 printf("\tinact %u inact_reload %u txrate %u\n", 2388 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2389 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2390 ni->ni_htcap, ni->ni_htparam, 2391 ni->ni_htctlchan, ni->ni_ht2ndchan); 2392 printf("\thtopmode %x htstbc %x chw %u\n", 2393 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2394} 2395 2396void 2397ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2398{ 2399 ieee80211_iterate_nodes(nt, 2400 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2401} 2402 2403static void 2404ieee80211_notify_erp_locked(struct ieee80211com *ic) 2405{ 2406 struct ieee80211vap *vap; 2407 2408 IEEE80211_LOCK_ASSERT(ic); 2409 2410 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2411 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2412 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2413} 2414 2415void 2416ieee80211_notify_erp(struct ieee80211com *ic) 2417{ 2418 IEEE80211_LOCK(ic); 2419 ieee80211_notify_erp_locked(ic); 2420 IEEE80211_UNLOCK(ic); 2421} 2422 2423/* 2424 * Handle a station joining an 11g network. 2425 */ 2426static void 2427ieee80211_node_join_11g(struct ieee80211_node *ni) 2428{ 2429 struct ieee80211com *ic = ni->ni_ic; 2430 2431 IEEE80211_LOCK_ASSERT(ic); 2432 2433 /* 2434 * Station isn't capable of short slot time. Bump 2435 * the count of long slot time stations and disable 2436 * use of short slot time. Note that the actual switch 2437 * over to long slot time use may not occur until the 2438 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2439 */ 2440 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2441 ic->ic_longslotsta++; 2442 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2443 "station needs long slot time, count %d", 2444 ic->ic_longslotsta); 2445 /* XXX vap's w/ conflicting needs won't work */ 2446 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2447 /* 2448 * Don't force slot time when switched to turbo 2449 * mode as non-ERP stations won't be present; this 2450 * need only be done when on the normal G channel. 2451 */ 2452 ieee80211_set_shortslottime(ic, 0); 2453 } 2454 } 2455 /* 2456 * If the new station is not an ERP station 2457 * then bump the counter and enable protection 2458 * if configured. 2459 */ 2460 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2461 ic->ic_nonerpsta++; 2462 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2463 "station is !ERP, %d non-ERP stations associated", 2464 ic->ic_nonerpsta); 2465 /* 2466 * If station does not support short preamble 2467 * then we must enable use of Barker preamble. 2468 */ 2469 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2470 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2471 "%s", "station needs long preamble"); 2472 ic->ic_flags |= IEEE80211_F_USEBARKER; 2473 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2474 } 2475 /* 2476 * If protection is configured and this is the first 2477 * indication we should use protection, enable it. 2478 */ 2479 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2480 ic->ic_nonerpsta == 1 && 2481 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2482 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2483 "%s: enable use of protection\n", __func__); 2484 ic->ic_flags |= IEEE80211_F_USEPROT; 2485 ieee80211_notify_erp_locked(ic); 2486 } 2487 } else 2488 ni->ni_flags |= IEEE80211_NODE_ERP; 2489} 2490 2491void 2492ieee80211_node_join(struct ieee80211_node *ni, int resp) 2493{ 2494 struct ieee80211com *ic = ni->ni_ic; 2495 struct ieee80211vap *vap = ni->ni_vap; 2496 int newassoc; 2497 2498 if (ni->ni_associd == 0) { 2499 uint16_t aid; 2500 2501 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2502 /* 2503 * It would be good to search the bitmap 2504 * more efficiently, but this will do for now. 2505 */ 2506 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2507 if (!IEEE80211_AID_ISSET(vap, aid)) 2508 break; 2509 } 2510 if (aid >= vap->iv_max_aid) { 2511 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2512 ieee80211_node_leave(ni); 2513 return; 2514 } 2515 ni->ni_associd = aid | 0xc000; 2516 ni->ni_jointime = time_uptime; 2517 IEEE80211_LOCK(ic); 2518 IEEE80211_AID_SET(vap, ni->ni_associd); 2519 vap->iv_sta_assoc++; 2520 ic->ic_sta_assoc++; 2521 2522 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2523 ieee80211_ht_node_join(ni); 2524 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2525 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2526 ieee80211_node_join_11g(ni); 2527 IEEE80211_UNLOCK(ic); 2528 2529 newassoc = 1; 2530 } else 2531 newassoc = 0; 2532 2533 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2534 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2535 IEEE80211_NODE_AID(ni), 2536 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2537 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2538 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2539 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2540 ni->ni_flags & IEEE80211_NODE_HT ? 2541 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2542 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2543 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2544 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2545 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2546 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2547 ", fast-frames" : "", 2548 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2549 ", turbo" : "" 2550 ); 2551 2552 ieee80211_node_setuptxparms(ni); 2553 ieee80211_ratectl_node_init(ni); 2554 /* give driver a chance to setup state like ni_txrate */ 2555 if (ic->ic_newassoc != NULL) 2556 ic->ic_newassoc(ni, newassoc); 2557 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2558 /* tell the authenticator about new station */ 2559 if (vap->iv_auth->ia_node_join != NULL) 2560 vap->iv_auth->ia_node_join(ni); 2561 ieee80211_notify_node_join(ni, 2562 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2563} 2564 2565static void 2566disable_protection(struct ieee80211com *ic) 2567{ 2568 KASSERT(ic->ic_nonerpsta == 0 && 2569 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2570 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2571 ic->ic_flags_ext)); 2572 2573 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2574 /* XXX verify mode? */ 2575 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2576 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2577 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2578 } 2579 ieee80211_notify_erp_locked(ic); 2580} 2581 2582/* 2583 * Handle a station leaving an 11g network. 2584 */ 2585static void 2586ieee80211_node_leave_11g(struct ieee80211_node *ni) 2587{ 2588 struct ieee80211com *ic = ni->ni_ic; 2589 2590 IEEE80211_LOCK_ASSERT(ic); 2591 2592 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2593 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2594 ic->ic_bsschan->ic_flags)); 2595 2596 /* 2597 * If a long slot station do the slot time bookkeeping. 2598 */ 2599 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2600 KASSERT(ic->ic_longslotsta > 0, 2601 ("bogus long slot station count %d", ic->ic_longslotsta)); 2602 ic->ic_longslotsta--; 2603 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2604 "long slot time station leaves, count now %d", 2605 ic->ic_longslotsta); 2606 if (ic->ic_longslotsta == 0) { 2607 /* 2608 * Re-enable use of short slot time if supported 2609 * and not operating in IBSS mode (per spec). 2610 */ 2611 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2612 ic->ic_opmode != IEEE80211_M_IBSS) { 2613 IEEE80211_DPRINTF(ni->ni_vap, 2614 IEEE80211_MSG_ASSOC, 2615 "%s: re-enable use of short slot time\n", 2616 __func__); 2617 ieee80211_set_shortslottime(ic, 1); 2618 } 2619 } 2620 } 2621 /* 2622 * If a non-ERP station do the protection-related bookkeeping. 2623 */ 2624 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2625 KASSERT(ic->ic_nonerpsta > 0, 2626 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2627 ic->ic_nonerpsta--; 2628 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2629 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2630 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2631 " (non-ERP sta present)" : ""); 2632 if (ic->ic_nonerpsta == 0 && 2633 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2634 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2635 "%s: disable use of protection\n", __func__); 2636 disable_protection(ic); 2637 } 2638 } 2639} 2640 2641/* 2642 * Time out presence of an overlapping bss with non-ERP 2643 * stations. When operating in hostap mode we listen for 2644 * beacons from other stations and if we identify a non-ERP 2645 * station is present we enable protection. To identify 2646 * when all non-ERP stations are gone we time out this 2647 * condition. 2648 */ 2649static void 2650ieee80211_erp_timeout(struct ieee80211com *ic) 2651{ 2652 2653 IEEE80211_LOCK_ASSERT(ic); 2654 2655 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2656 ieee80211_time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2657#if 0 2658 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2659 "%s", "age out non-ERP sta present on channel"); 2660#endif 2661 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2662 if (ic->ic_nonerpsta == 0) 2663 disable_protection(ic); 2664 } 2665} 2666 2667/* 2668 * Handle bookkeeping for station deauthentication/disassociation 2669 * when operating as an ap. 2670 */ 2671void 2672ieee80211_node_leave(struct ieee80211_node *ni) 2673{ 2674 struct ieee80211com *ic = ni->ni_ic; 2675 struct ieee80211vap *vap = ni->ni_vap; 2676 struct ieee80211_node_table *nt = ni->ni_table; 2677 2678 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2679 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2680 2681 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2682 ("unexpected operating mode %u", vap->iv_opmode)); 2683 /* 2684 * If node wasn't previously associated all 2685 * we need to do is reclaim the reference. 2686 */ 2687 /* XXX ibss mode bypasses 11g and notification */ 2688 if (ni->ni_associd == 0) 2689 goto done; 2690 /* 2691 * Tell the authenticator the station is leaving. 2692 * Note that we must do this before yanking the 2693 * association id as the authenticator uses the 2694 * associd to locate it's state block. 2695 */ 2696 if (vap->iv_auth->ia_node_leave != NULL) 2697 vap->iv_auth->ia_node_leave(ni); 2698 2699 IEEE80211_LOCK(ic); 2700 IEEE80211_AID_CLR(vap, ni->ni_associd); 2701 vap->iv_sta_assoc--; 2702 ic->ic_sta_assoc--; 2703 2704 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2705 ieee80211_ht_node_leave(ni); 2706 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2707 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2708 ieee80211_node_leave_11g(ni); 2709 IEEE80211_UNLOCK(ic); 2710 /* 2711 * Cleanup station state. In particular clear various 2712 * state that might otherwise be reused if the node 2713 * is reused before the reference count goes to zero 2714 * (and memory is reclaimed). 2715 */ 2716 ieee80211_sta_leave(ni); 2717done: 2718 /* 2719 * Remove the node from any table it's recorded in and 2720 * drop the caller's reference. Removal from the table 2721 * is important to insure the node is not reprocessed 2722 * for inactivity. 2723 */ 2724 if (nt != NULL) { 2725 IEEE80211_NODE_LOCK(nt); 2726 node_reclaim(nt, ni); 2727 IEEE80211_NODE_UNLOCK(nt); 2728 } else 2729 ieee80211_free_node(ni); 2730} 2731 2732struct rssiinfo { 2733 struct ieee80211vap *vap; 2734 int rssi_samples; 2735 uint32_t rssi_total; 2736}; 2737 2738static void 2739get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2740{ 2741 struct rssiinfo *info = arg; 2742 struct ieee80211vap *vap = ni->ni_vap; 2743 int8_t rssi; 2744 2745 if (info->vap != vap) 2746 return; 2747 /* only associated stations */ 2748 if (ni->ni_associd == 0) 2749 return; 2750 rssi = vap->iv_ic->ic_node_getrssi(ni); 2751 if (rssi != 0) { 2752 info->rssi_samples++; 2753 info->rssi_total += rssi; 2754 } 2755} 2756 2757static void 2758get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2759{ 2760 struct rssiinfo *info = arg; 2761 struct ieee80211vap *vap = ni->ni_vap; 2762 int8_t rssi; 2763 2764 if (info->vap != vap) 2765 return; 2766 /* only neighbors */ 2767 /* XXX check bssid */ 2768 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2769 return; 2770 rssi = vap->iv_ic->ic_node_getrssi(ni); 2771 if (rssi != 0) { 2772 info->rssi_samples++; 2773 info->rssi_total += rssi; 2774 } 2775} 2776 2777#ifdef IEEE80211_SUPPORT_MESH 2778static void 2779get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2780{ 2781 struct rssiinfo *info = arg; 2782 struct ieee80211vap *vap = ni->ni_vap; 2783 int8_t rssi; 2784 2785 if (info->vap != vap) 2786 return; 2787 /* only neighbors that peered successfully */ 2788 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2789 return; 2790 rssi = vap->iv_ic->ic_node_getrssi(ni); 2791 if (rssi != 0) { 2792 info->rssi_samples++; 2793 info->rssi_total += rssi; 2794 } 2795} 2796#endif /* IEEE80211_SUPPORT_MESH */ 2797 2798int8_t 2799ieee80211_getrssi(struct ieee80211vap *vap) 2800{ 2801#define NZ(x) ((x) == 0 ? 1 : (x)) 2802 struct ieee80211com *ic = vap->iv_ic; 2803 struct rssiinfo info; 2804 2805 info.rssi_total = 0; 2806 info.rssi_samples = 0; 2807 info.vap = vap; 2808 switch (vap->iv_opmode) { 2809 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2810 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2811 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2812 break; 2813 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2814 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2815 break; 2816#ifdef IEEE80211_SUPPORT_MESH 2817 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2818 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2819 break; 2820#endif 2821 case IEEE80211_M_MONITOR: /* XXX */ 2822 case IEEE80211_M_STA: /* use stats from associated ap */ 2823 default: 2824 if (vap->iv_bss != NULL) 2825 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2826 info.rssi_samples = 1; 2827 break; 2828 } 2829 return info.rssi_total / NZ(info.rssi_samples); 2830#undef NZ 2831} 2832 2833void 2834ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2835{ 2836 2837 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2838 return; 2839 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2840 /* for non-station mode return avg'd rssi accounting */ 2841 if (vap->iv_opmode != IEEE80211_M_STA) 2842 *rssi = ieee80211_getrssi(vap); 2843} 2844