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 * $FreeBSD: head/sys/net80211/ieee80211_node.c 206358 2010-04-07 15:29:13Z rpaulo $ 27 */ 28 29 #include "opt_wlan.h" 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/mbuf.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 37 #include <sys/socket.h> 38 39 #include <net/if.h> 40 #include <net/if_media.h> 41 #include <net/ethernet.h> 42 #include <net/route.h> 43 44 #include <netproto/802_11/ieee80211_var.h> 45 #include <netproto/802_11/ieee80211_input.h> 46 #ifdef IEEE80211_SUPPORT_SUPERG 47 #include <netproto/802_11/ieee80211_superg.h> 48 #endif 49 #ifdef IEEE80211_SUPPORT_TDMA 50 #include <netproto/802_11/ieee80211_tdma.h> 51 #endif 52 #include <netproto/802_11/ieee80211_wds.h> 53 #include <netproto/802_11/ieee80211_mesh.h> 54 #include <netproto/802_11/ieee80211_ratectl.h> 55 56 #include <net/bpf.h> 57 58 /* 59 * IEEE80211_NODE_HASHSIZE must be a power of 2. 60 */ 61 CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); 62 63 /* 64 * Association id's are managed with a bit vector. 65 */ 66 #define IEEE80211_AID_SET(_vap, b) \ 67 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 68 (1 << (IEEE80211_AID(b) % 32))) 69 #define IEEE80211_AID_CLR(_vap, b) \ 70 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 71 ~(1 << (IEEE80211_AID(b) % 32))) 72 #define IEEE80211_AID_ISSET(_vap, b) \ 73 ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 74 75 #ifdef IEEE80211_DEBUG_REFCNT 76 #define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 77 #else 78 #define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 79 #endif 80 81 static int ieee80211_sta_join1(struct ieee80211_node *); 82 83 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 84 const uint8_t [IEEE80211_ADDR_LEN]); 85 static void node_cleanup(struct ieee80211_node *); 86 static void node_free(struct ieee80211_node *); 87 static void node_age(struct ieee80211_node *); 88 static int8_t node_getrssi(const struct ieee80211_node *); 89 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 90 static void node_getmimoinfo(const struct ieee80211_node *, 91 struct ieee80211_mimo_info *); 92 static void ieee80211_node_timeout_callout(void *arg); 93 94 static void _ieee80211_free_node(struct ieee80211_node *); 95 96 static void ieee80211_node_table_init(struct ieee80211com *ic, 97 struct ieee80211_node_table *nt, const char *name, 98 int inact, int keymaxix); 99 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 100 struct ieee80211vap *); 101 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 102 static void ieee80211_erp_timeout(struct ieee80211com *); 103 104 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 105 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 106 107 void 108 ieee80211_node_attach(struct ieee80211com *ic) 109 { 110 /* XXX really want maxlen enforced per-sta */ 111 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 112 "802.11 staging q"); 113 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 114 IEEE80211_INACT_INIT, ic->ic_max_keyix); 115 callout_init_mp(&ic->ic_inact); 116 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 117 ieee80211_node_timeout_callout, ic); 118 119 ic->ic_node_alloc = node_alloc; 120 ic->ic_node_free = node_free; 121 ic->ic_node_cleanup = node_cleanup; 122 ic->ic_node_age = node_age; 123 ic->ic_node_drain = node_age; /* NB: same as age */ 124 ic->ic_node_getrssi = node_getrssi; 125 ic->ic_node_getsignal = node_getsignal; 126 ic->ic_node_getmimoinfo = node_getmimoinfo; 127 128 /* 129 * Set flags to be propagated to all vap's; 130 * these define default behaviour/configuration. 131 */ 132 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 133 } 134 135 void 136 ieee80211_node_detach(struct ieee80211com *ic) 137 { 138 139 callout_stop(&ic->ic_inact); 140 ieee80211_node_table_cleanup(&ic->ic_sta); 141 ieee80211_ageq_cleanup(&ic->ic_stageq); 142 } 143 144 void 145 ieee80211_node_vattach(struct ieee80211vap *vap) 146 { 147 /* NB: driver can override */ 148 vap->iv_max_aid = IEEE80211_AID_DEF; 149 150 /* default station inactivity timer setings */ 151 vap->iv_inact_init = IEEE80211_INACT_INIT; 152 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 153 vap->iv_inact_run = IEEE80211_INACT_RUN; 154 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 155 156 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 157 "%s: init %u auth %u run %u probe %u\n", __func__, 158 vap->iv_inact_init, vap->iv_inact_auth, 159 vap->iv_inact_run, vap->iv_inact_probe); 160 } 161 162 void 163 ieee80211_node_latevattach(struct ieee80211vap *vap) 164 { 165 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 166 /* XXX should we allow max aid to be zero? */ 167 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 168 vap->iv_max_aid = IEEE80211_AID_MIN; 169 if_printf(vap->iv_ifp, 170 "WARNING: max aid too small, changed to %d\n", 171 vap->iv_max_aid); 172 } 173 vap->iv_aid_bitmap = (uint32_t *) kmalloc( 174 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 175 M_80211_NODE, M_INTWAIT | M_ZERO); 176 if (vap->iv_aid_bitmap == NULL) { 177 /* XXX no way to recover */ 178 kprintf("%s: no memory for AID bitmap, max aid %d!\n", 179 __func__, vap->iv_max_aid); 180 vap->iv_max_aid = 0; 181 } 182 } 183 184 ieee80211_reset_bss(vap); 185 186 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 187 } 188 189 void 190 ieee80211_node_vdetach(struct ieee80211vap *vap) 191 { 192 struct ieee80211com *ic = vap->iv_ic; 193 194 ieee80211_node_table_reset(&ic->ic_sta, vap); 195 if (vap->iv_bss != NULL) { 196 ieee80211_free_node(vap->iv_bss); 197 vap->iv_bss = NULL; 198 } 199 if (vap->iv_aid_bitmap != NULL) { 200 kfree(vap->iv_aid_bitmap, M_80211_NODE); 201 vap->iv_aid_bitmap = NULL; 202 } 203 } 204 205 /* 206 * Port authorize/unauthorize interfaces for use by an authenticator. 207 */ 208 209 void 210 ieee80211_node_authorize(struct ieee80211_node *ni) 211 { 212 struct ieee80211vap *vap = ni->ni_vap; 213 214 ni->ni_flags |= IEEE80211_NODE_AUTH; 215 ni->ni_inact_reload = vap->iv_inact_run; 216 ni->ni_inact = ni->ni_inact_reload; 217 218 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 219 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 220 } 221 222 void 223 ieee80211_node_unauthorize(struct ieee80211_node *ni) 224 { 225 struct ieee80211vap *vap = ni->ni_vap; 226 227 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 228 ni->ni_inact_reload = vap->iv_inact_auth; 229 if (ni->ni_inact > ni->ni_inact_reload) 230 ni->ni_inact = ni->ni_inact_reload; 231 232 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 233 "%s: inact_reload %u inact %u", __func__, 234 ni->ni_inact_reload, ni->ni_inact); 235 } 236 237 /* 238 * Fix tx parameters for a node according to ``association state''. 239 */ 240 void 241 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 242 { 243 struct ieee80211vap *vap = ni->ni_vap; 244 enum ieee80211_phymode mode; 245 246 if (ni->ni_flags & IEEE80211_NODE_HT) { 247 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 248 mode = IEEE80211_MODE_11NA; 249 else 250 mode = IEEE80211_MODE_11NG; 251 } else { /* legacy rate handling */ 252 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 253 mode = IEEE80211_MODE_STURBO_A; 254 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 255 mode = IEEE80211_MODE_HALF; 256 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 257 mode = IEEE80211_MODE_QUARTER; 258 /* NB: 108A should be handled as 11a */ 259 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 260 mode = IEEE80211_MODE_11A; 261 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 262 (ni->ni_flags & IEEE80211_NODE_ERP)) 263 mode = IEEE80211_MODE_11G; 264 else 265 mode = IEEE80211_MODE_11B; 266 } 267 ni->ni_txparms = &vap->iv_txparms[mode]; 268 } 269 270 /* 271 * Set/change the channel. The rate set is also updated as 272 * to insure a consistent view by drivers. 273 * XXX should be private but hostap needs it to deal with CSA 274 */ 275 void 276 ieee80211_node_set_chan(struct ieee80211_node *ni, 277 struct ieee80211_channel *chan) 278 { 279 struct ieee80211com *ic = ni->ni_ic; 280 struct ieee80211vap *vap = ni->ni_vap; 281 enum ieee80211_phymode mode; 282 283 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 284 285 ni->ni_chan = chan; 286 mode = ieee80211_chan2mode(chan); 287 if (IEEE80211_IS_CHAN_HT(chan)) { 288 /* 289 * XXX Gotta be careful here; the rate set returned by 290 * ieee80211_get_suprates is actually any HT rate 291 * set so blindly copying it will be bad. We must 292 * 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 } 314 315 static __inline void 316 copy_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 } 325 326 void 327 ieee80211_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 */ 425 void 426 ieee80211_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 } 446 447 static int 448 match_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 */ 464 static int 465 check_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 */ 504 static void 505 check_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 char ethstr[ETHER_ADDRSTRLEN + 1]; 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 kprintf(" %c %s", fail ? '-' : '+', kether_ntoa(ni->ni_macaddr, ethstr)); 542 kprintf(" %s%c", kether_ntoa(ni->ni_bssid, ethstr), fail & 0x20 ? '!' : ' '); 543 kprintf(" %3d%c", 544 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 545 kprintf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 546 fail & 0x08 ? '!' : ' '); 547 kprintf(" %4s%c", 548 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 549 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 550 "????", 551 fail & 0x02 ? '!' : ' '); 552 kprintf(" %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 kprintf("%s\n", fail & 0x10 ? "!" : ""); 557 } 558 #endif /* IEEE80211_DEBUG */ 559 560 /* 561 * Handle 802.11 ad hoc network merge. The 562 * convention, set by the Wireless Ethernet Compatibility Alliance 563 * (WECA), is that an 802.11 station will change its BSSID to match 564 * the "oldest" 802.11 ad hoc network, on the same channel, that 565 * has the station's desired SSID. The "oldest" 802.11 network 566 * sends beacons with the greatest TSF timestamp. 567 * 568 * The caller is assumed to validate TSF's before attempting a merge. 569 * 570 * Return !0 if the BSSID changed, 0 otherwise. 571 */ 572 int 573 ieee80211_ibss_merge(struct ieee80211_node *ni) 574 { 575 struct ieee80211vap *vap = ni->ni_vap; 576 #ifdef IEEE80211_DEBUG 577 struct ieee80211com *ic = ni->ni_ic; 578 char ethstr[ETHER_ADDRSTRLEN + 1]; 579 #endif 580 581 if (ni == vap->iv_bss || 582 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 583 /* unchanged, nothing to do */ 584 return 0; 585 } 586 if (!check_bss(vap, ni)) { 587 /* capabilities mismatch */ 588 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 589 "%s: merge failed, capabilities mismatch\n", __func__); 590 #ifdef IEEE80211_DEBUG 591 if (ieee80211_msg_assoc(vap)) 592 check_bss_debug(vap, ni); 593 #endif 594 vap->iv_stats.is_ibss_capmismatch++; 595 return 0; 596 } 597 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 598 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 599 kether_ntoa(ni->ni_bssid, ethstr), 600 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 601 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 602 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 603 ); 604 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 605 } 606 607 /* 608 * Calculate HT channel promotion flags for all vaps. 609 * This assumes ni_chan have been setup for each vap. 610 */ 611 static int 612 gethtadjustflags(struct ieee80211com *ic) 613 { 614 struct ieee80211vap *vap; 615 int flags; 616 617 flags = 0; 618 /* XXX locking */ 619 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 620 if (vap->iv_state < IEEE80211_S_RUN) 621 continue; 622 switch (vap->iv_opmode) { 623 case IEEE80211_M_WDS: 624 case IEEE80211_M_STA: 625 case IEEE80211_M_AHDEMO: 626 case IEEE80211_M_HOSTAP: 627 case IEEE80211_M_IBSS: 628 case IEEE80211_M_MBSS: 629 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 630 break; 631 default: 632 break; 633 } 634 } 635 return flags; 636 } 637 638 /* 639 * Check if the current channel needs to change based on whether 640 * any vap's are using HT20/HT40. This is used to sync the state 641 * of ic_curchan after a channel width change on a running vap. 642 */ 643 void 644 ieee80211_sync_curchan(struct ieee80211com *ic) 645 { 646 struct ieee80211_channel *c; 647 648 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 649 if (c != ic->ic_curchan) { 650 ic->ic_curchan = c; 651 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 652 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 653 ic->ic_set_channel(ic); 654 ieee80211_radiotap_chan_change(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 */ 662 void 663 ieee80211_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 */ 685 void 686 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 687 { 688 ieee80211_setupcurchan(ic, c); 689 ieee80211_runtask(ic, &ic->ic_chan_task); 690 } 691 692 /* 693 * Join the specified IBSS/BSS network. The node is assumed to 694 * be passed in with a held reference. 695 */ 696 static int 697 ieee80211_sta_join1(struct ieee80211_node *selbs) 698 { 699 struct ieee80211vap *vap = selbs->ni_vap; 700 struct ieee80211com *ic = selbs->ni_ic; 701 struct ieee80211_node *obss; 702 int canreassoc; 703 704 /* 705 * Committed to selbs, setup state. 706 */ 707 obss = vap->iv_bss; 708 /* 709 * Check if old+new node have the same address in which 710 * case we can reassociate when operating in sta mode. 711 */ 712 canreassoc = (obss != NULL && 713 vap->iv_state == IEEE80211_S_RUN && 714 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 715 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 716 if (obss != NULL) { 717 copy_bss(selbs, obss); 718 ieee80211_node_decref(obss); /* iv_bss reference */ 719 ieee80211_free_node(obss); /* station table reference */ 720 obss = NULL; /* NB: guard against later use */ 721 } 722 723 /* 724 * Delete unusable rates; we've already checked 725 * that the negotiated rate set is acceptable. 726 */ 727 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 728 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 729 730 ieee80211_setcurchan(ic, selbs->ni_chan); 731 /* 732 * Set the erp state (mostly the slot time) to deal with 733 * the auto-select case; this should be redundant if the 734 * mode is locked. 735 */ 736 ieee80211_reset_erp(ic); 737 ieee80211_wme_initparams(vap); 738 739 if (vap->iv_opmode == IEEE80211_M_STA) { 740 if (canreassoc) { 741 /* Reassociate */ 742 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 743 } else { 744 /* 745 * Act as if we received a DEAUTH frame in case we 746 * are invoked from the RUN state. This will cause 747 * us to try to re-authenticate if we are operating 748 * as a station. 749 */ 750 ieee80211_new_state(vap, IEEE80211_S_AUTH, 751 IEEE80211_FC0_SUBTYPE_DEAUTH); 752 } 753 } else 754 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 755 return 1; 756 } 757 758 int 759 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 760 const struct ieee80211_scan_entry *se) 761 { 762 struct ieee80211com *ic = vap->iv_ic; 763 struct ieee80211_node *ni; 764 765 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 766 if (ni == NULL) { 767 /* XXX msg */ 768 return 0; 769 } 770 /* 771 * Expand scan state into node's format. 772 * XXX may not need all this stuff 773 */ 774 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 775 ni->ni_esslen = se->se_ssid[1]; 776 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 777 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 778 ni->ni_intval = se->se_intval; 779 ni->ni_capinfo = se->se_capinfo; 780 ni->ni_chan = chan; 781 ni->ni_timoff = se->se_timoff; 782 ni->ni_fhdwell = se->se_fhdwell; 783 ni->ni_fhindex = se->se_fhindex; 784 ni->ni_erp = se->se_erp; 785 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 786 ni->ni_noise = se->se_noise; 787 if (vap->iv_opmode == IEEE80211_M_STA) { 788 /* NB: only infrastructure mode requires an associd */ 789 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 790 } 791 792 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 793 ieee80211_ies_expand(&ni->ni_ies); 794 #ifdef IEEE80211_SUPPORT_SUPERG 795 if (ni->ni_ies.ath_ie != NULL) 796 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 797 #endif 798 if (ni->ni_ies.htcap_ie != NULL) 799 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 800 if (ni->ni_ies.htinfo_ie != NULL) 801 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 802 #ifdef IEEE80211_SUPPORT_MESH 803 if (ni->ni_ies.meshid_ie != NULL) 804 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 805 #endif 806 #ifdef IEEE80211_SUPPORT_TDMA 807 if (ni->ni_ies.tdma_ie != NULL) 808 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 809 #endif 810 } 811 812 vap->iv_dtim_period = se->se_dtimperiod; 813 vap->iv_dtim_count = 0; 814 815 /* NB: must be after ni_chan is setup */ 816 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 817 IEEE80211_F_DOSORT); 818 if (ieee80211_iserp_rateset(&ni->ni_rates)) 819 ni->ni_flags |= IEEE80211_NODE_ERP; 820 ieee80211_node_setuptxparms(ni); 821 822 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 823 } 824 825 /* 826 * Leave the specified IBSS/BSS network. The node is assumed to 827 * be passed in with a held reference. 828 */ 829 void 830 ieee80211_sta_leave(struct ieee80211_node *ni) 831 { 832 struct ieee80211com *ic = ni->ni_ic; 833 834 ic->ic_node_cleanup(ni); 835 ieee80211_notify_node_leave(ni); 836 } 837 838 /* 839 * Send a deauthenticate frame and drop the station. 840 */ 841 void 842 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 843 { 844 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 845 ieee80211_ref_node(ni); 846 if (ni->ni_associd != 0) 847 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 848 ieee80211_node_leave(ni); 849 ieee80211_free_node(ni); 850 } 851 852 static struct ieee80211_node * 853 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 854 { 855 struct ieee80211_node *ni; 856 857 ni = (struct ieee80211_node *) kmalloc(sizeof(struct ieee80211_node), 858 M_80211_NODE, M_INTWAIT | M_ZERO); 859 return ni; 860 } 861 862 /* 863 * Initialize an ie blob with the specified data. If previous 864 * data exists re-use the data block. As a side effect we clear 865 * all references to specific ie's; the caller is required to 866 * recalculate them. 867 */ 868 int 869 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 870 { 871 /* NB: assumes data+len are the last fields */ 872 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 873 if (ies->data != NULL && ies->len != len) { 874 /* data size changed */ 875 kfree(ies->data, M_80211_NODE_IE); 876 ies->data = NULL; 877 } 878 if (ies->data == NULL) { 879 ies->data = (uint8_t *) kmalloc(len, M_80211_NODE_IE, M_INTWAIT); 880 if (ies->data == NULL) { 881 ies->len = 0; 882 /* NB: pointers have already been zero'd above */ 883 return 0; 884 } 885 } 886 memcpy(ies->data, data, len); 887 ies->len = len; 888 return 1; 889 } 890 891 /* 892 * Reclaim storage for an ie blob. 893 */ 894 void 895 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 896 { 897 if (ies->data != NULL) 898 kfree(ies->data, M_80211_NODE_IE); 899 } 900 901 /* 902 * Expand an ie blob data contents and to fillin individual 903 * ie pointers. The data blob is assumed to be well-formed; 904 * we don't do any validity checking of ie lengths. 905 */ 906 void 907 ieee80211_ies_expand(struct ieee80211_ies *ies) 908 { 909 uint8_t *ie; 910 int ielen; 911 912 ie = ies->data; 913 ielen = ies->len; 914 while (ielen > 0) { 915 switch (ie[0]) { 916 case IEEE80211_ELEMID_VENDOR: 917 if (iswpaoui(ie)) 918 ies->wpa_ie = ie; 919 else if (iswmeoui(ie)) 920 ies->wme_ie = ie; 921 #ifdef IEEE80211_SUPPORT_SUPERG 922 else if (isatherosoui(ie)) 923 ies->ath_ie = ie; 924 #endif 925 #ifdef IEEE80211_SUPPORT_TDMA 926 else if (istdmaoui(ie)) 927 ies->tdma_ie = ie; 928 #endif 929 break; 930 case IEEE80211_ELEMID_RSN: 931 ies->rsn_ie = ie; 932 break; 933 case IEEE80211_ELEMID_HTCAP: 934 ies->htcap_ie = ie; 935 break; 936 #ifdef IEEE80211_SUPPORT_MESH 937 case IEEE80211_ELEMID_MESHID: 938 ies->meshid_ie = ie; 939 break; 940 #endif 941 } 942 ielen -= 2 + ie[1]; 943 ie += 2 + ie[1]; 944 } 945 } 946 947 /* 948 * Reclaim any resources in a node and reset any critical 949 * state. Typically nodes are free'd immediately after, 950 * but in some cases the storage may be reused so we need 951 * to insure consistent state (should probably fix that). 952 */ 953 static void 954 node_cleanup(struct ieee80211_node *ni) 955 { 956 struct ieee80211vap *vap = ni->ni_vap; 957 struct ieee80211com *ic = ni->ni_ic; 958 int i; 959 960 /* NB: preserve ni_table */ 961 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 962 if (vap->iv_opmode != IEEE80211_M_STA) 963 vap->iv_ps_sta--; 964 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 965 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 966 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 967 } 968 /* 969 * Cleanup any HT-related state. 970 */ 971 if (ni->ni_flags & IEEE80211_NODE_HT) 972 ieee80211_ht_node_cleanup(ni); 973 #ifdef IEEE80211_SUPPORT_SUPERG 974 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 975 ieee80211_ff_node_cleanup(ni); 976 #endif 977 #ifdef IEEE80211_SUPPORT_MESH 978 /* 979 * Cleanup any mesh-related state. 980 */ 981 if (vap->iv_opmode == IEEE80211_M_MBSS) 982 ieee80211_mesh_node_cleanup(ni); 983 #endif 984 /* 985 * Clear any staging queue entries. 986 */ 987 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 988 989 /* 990 * Clear AREF flag that marks the authorization refcnt bump 991 * has happened. This is probably not needed as the node 992 * should always be removed from the table so not found but 993 * do it just in case. 994 * Likewise clear the ASSOCID flag as these flags are intended 995 * to be managed in tandem. 996 */ 997 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 998 999 /* 1000 * Drain power save queue and, if needed, clear TIM. 1001 */ 1002 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1003 vap->iv_set_tim(ni, 0); 1004 1005 ni->ni_associd = 0; 1006 if (ni->ni_challenge != NULL) { 1007 kfree(ni->ni_challenge, M_80211_NODE); 1008 ni->ni_challenge = NULL; 1009 } 1010 /* 1011 * Preserve SSID, WPA, and WME ie's so the bss node is 1012 * reusable during a re-auth/re-assoc state transition. 1013 * If we remove these data they will not be recreated 1014 * because they come from a probe-response or beacon frame 1015 * which cannot be expected prior to the association-response. 1016 * This should not be an issue when operating in other modes 1017 * as stations leaving always go through a full state transition 1018 * which will rebuild this state. 1019 * 1020 * XXX does this leave us open to inheriting old state? 1021 */ 1022 for (i = 0; i < NELEM(ni->ni_rxfrag); i++) 1023 if (ni->ni_rxfrag[i] != NULL) { 1024 m_freem(ni->ni_rxfrag[i]); 1025 ni->ni_rxfrag[i] = NULL; 1026 } 1027 /* 1028 * Must be careful here to remove any key map entry w/o a LOR. 1029 */ 1030 ieee80211_node_delucastkey(ni); 1031 } 1032 1033 static void 1034 node_free(struct ieee80211_node *ni) 1035 { 1036 struct ieee80211com *ic = ni->ni_ic; 1037 1038 ieee80211_ratectl_node_deinit(ni); 1039 ic->ic_node_cleanup(ni); 1040 ieee80211_ies_cleanup(&ni->ni_ies); 1041 ieee80211_psq_cleanup(&ni->ni_psq); 1042 kfree(ni, M_80211_NODE); 1043 } 1044 1045 static void 1046 node_age(struct ieee80211_node *ni) 1047 { 1048 struct ieee80211vap *vap = ni->ni_vap; 1049 1050 /* 1051 * Age frames on the power save queue. 1052 */ 1053 if (ieee80211_node_psq_age(ni) != 0 && 1054 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1055 vap->iv_set_tim(ni, 0); 1056 /* 1057 * Age out HT resources (e.g. frames on the 1058 * A-MPDU reorder queues). 1059 */ 1060 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1061 ieee80211_ht_node_age(ni); 1062 } 1063 1064 static int8_t 1065 node_getrssi(const struct ieee80211_node *ni) 1066 { 1067 uint32_t avgrssi = ni->ni_avgrssi; 1068 int32_t rssi; 1069 1070 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1071 return 0; 1072 rssi = IEEE80211_RSSI_GET(avgrssi); 1073 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1074 } 1075 1076 static void 1077 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1078 { 1079 *rssi = node_getrssi(ni); 1080 *noise = ni->ni_noise; 1081 } 1082 1083 static void 1084 node_getmimoinfo(const struct ieee80211_node *ni, 1085 struct ieee80211_mimo_info *info) 1086 { 1087 /* XXX zero data? */ 1088 } 1089 1090 struct ieee80211_node * 1091 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1092 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1093 { 1094 struct ieee80211com *ic = nt->nt_ic; 1095 struct ieee80211_node *ni; 1096 int hash; 1097 #ifdef IEEE80211_DEBUG 1098 char ethstr[ETHER_ADDRSTRLEN + 1]; 1099 #endif 1100 1101 ni = ic->ic_node_alloc(vap, macaddr); 1102 if (ni == NULL) { 1103 vap->iv_stats.is_rx_nodealloc++; 1104 return NULL; 1105 } 1106 1107 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1108 "%s %p<%s> in %s table\n", __func__, ni, 1109 kether_ntoa(macaddr, ethstr), nt->nt_name); 1110 1111 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1112 hash = IEEE80211_NODE_HASH(ic, macaddr); 1113 ieee80211_node_initref(ni); /* mark referenced */ 1114 ni->ni_chan = IEEE80211_CHAN_ANYC; 1115 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1116 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1117 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1118 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1119 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1120 ni->ni_inact_reload = nt->nt_inact_init; 1121 ni->ni_inact = ni->ni_inact_reload; 1122 ni->ni_ath_defkeyix = 0x7fff; 1123 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1124 #ifdef IEEE80211_SUPPORT_MESH 1125 if (vap->iv_opmode == IEEE80211_M_MBSS) 1126 ieee80211_mesh_node_init(vap, ni); 1127 #endif 1128 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1129 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1130 ni->ni_table = nt; 1131 ni->ni_vap = vap; 1132 ni->ni_ic = ic; 1133 1134 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1135 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1136 1137 return ni; 1138 } 1139 1140 /* 1141 * Craft a temporary node suitable for sending a management frame 1142 * to the specified station. We craft only as much state as we 1143 * need to do the work since the node will be immediately reclaimed 1144 * once the send completes. 1145 */ 1146 struct ieee80211_node * 1147 ieee80211_tmp_node(struct ieee80211vap *vap, 1148 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1149 { 1150 struct ieee80211com *ic = vap->iv_ic; 1151 struct ieee80211_node *ni; 1152 #ifdef IEEE80211_DEBUG 1153 char ethstr[ETHER_ADDRSTRLEN + 1]; 1154 #endif 1155 1156 ni = ic->ic_node_alloc(vap, macaddr); 1157 if (ni != NULL) { 1158 struct ieee80211_node *bss = vap->iv_bss; 1159 1160 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1161 "%s %p<%s>\n", __func__, ni, kether_ntoa(macaddr, ethstr)); 1162 1163 ni->ni_table = NULL; /* NB: pedantic */ 1164 ni->ni_ic = ic; /* NB: needed to set channel */ 1165 ni->ni_vap = vap; 1166 1167 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1168 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1169 ieee80211_node_initref(ni); /* mark referenced */ 1170 /* NB: required by ieee80211_fix_rate */ 1171 ieee80211_node_set_chan(ni, bss->ni_chan); 1172 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1173 IEEE80211_KEYIX_NONE); 1174 ni->ni_txpower = bss->ni_txpower; 1175 /* XXX optimize away */ 1176 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1177 } else { 1178 /* XXX msg */ 1179 vap->iv_stats.is_rx_nodealloc++; 1180 } 1181 return ni; 1182 } 1183 1184 struct ieee80211_node * 1185 ieee80211_dup_bss(struct ieee80211vap *vap, 1186 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1187 { 1188 struct ieee80211com *ic = vap->iv_ic; 1189 struct ieee80211_node *ni; 1190 1191 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1192 if (ni != NULL) { 1193 struct ieee80211_node *bss = vap->iv_bss; 1194 /* 1195 * Inherit from iv_bss. 1196 */ 1197 copy_bss(ni, bss); 1198 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1199 ieee80211_node_set_chan(ni, bss->ni_chan); 1200 } 1201 return ni; 1202 } 1203 1204 /* 1205 * Create a bss node for a legacy WDS vap. The far end does 1206 * not associate so we just create create a new node and 1207 * simulate an association. The caller is responsible for 1208 * installing the node as the bss node and handling any further 1209 * setup work like authorizing the port. 1210 */ 1211 struct ieee80211_node * 1212 ieee80211_node_create_wds(struct ieee80211vap *vap, 1213 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1214 { 1215 struct ieee80211com *ic = vap->iv_ic; 1216 struct ieee80211_node *ni; 1217 1218 /* XXX check if node already in sta table? */ 1219 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1220 if (ni != NULL) { 1221 ni->ni_wdsvap = vap; 1222 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1223 /* 1224 * Inherit any manually configured settings. 1225 */ 1226 copy_bss(ni, vap->iv_bss); 1227 ieee80211_node_set_chan(ni, chan); 1228 /* NB: propagate ssid so available to WPA supplicant */ 1229 ni->ni_esslen = vap->iv_des_ssid[0].len; 1230 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1231 /* NB: no associd for peer */ 1232 /* 1233 * There are no management frames to use to 1234 * discover neighbor capabilities, so blindly 1235 * propagate the local configuration. 1236 */ 1237 if (vap->iv_flags & IEEE80211_F_WME) 1238 ni->ni_flags |= IEEE80211_NODE_QOS; 1239 #ifdef IEEE80211_SUPPORT_SUPERG 1240 if (vap->iv_flags & IEEE80211_F_FF) 1241 ni->ni_flags |= IEEE80211_NODE_FF; 1242 #endif 1243 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1244 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1245 /* 1246 * Device is HT-capable and HT is enabled for 1247 * the vap; setup HT operation. On return 1248 * ni_chan will be adjusted to an HT channel. 1249 */ 1250 ieee80211_ht_wds_init(ni); 1251 } else { 1252 struct ieee80211_channel *c = ni->ni_chan; 1253 /* 1254 * Force a legacy channel to be used. 1255 */ 1256 c = ieee80211_find_channel(ic, 1257 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1258 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1259 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1260 ni->ni_chan = c; 1261 } 1262 } 1263 return ni; 1264 } 1265 1266 struct ieee80211_node * 1267 #ifdef IEEE80211_DEBUG_REFCNT 1268 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1269 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1270 #else 1271 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1272 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1273 #endif 1274 { 1275 struct ieee80211_node *ni; 1276 int hash; 1277 #ifdef IEEE80211_DEBUG_REFCNT 1278 char ethstr[ETHER_ADDRSTRLEN + 1]; 1279 #endif 1280 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1281 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1282 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1283 ieee80211_ref_node(ni); /* mark referenced */ 1284 #ifdef IEEE80211_DEBUG_REFCNT 1285 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1286 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1287 func, line, 1288 ni, kether_ntoa(ni->ni_macaddr, ethstr), 1289 ieee80211_node_refcnt(ni)); 1290 #endif 1291 return ni; 1292 } 1293 } 1294 return NULL; 1295 } 1296 1297 struct ieee80211_node * 1298 #ifdef IEEE80211_DEBUG_REFCNT 1299 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1300 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1301 #else 1302 ieee80211_find_node(struct ieee80211_node_table *nt, 1303 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1304 #endif 1305 { 1306 struct ieee80211_node *ni; 1307 1308 ni = ieee80211_find_node_locked(nt, macaddr); 1309 return ni; 1310 } 1311 1312 struct ieee80211_node * 1313 #ifdef IEEE80211_DEBUG_REFCNT 1314 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1315 const struct ieee80211vap *vap, 1316 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1317 #else 1318 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1319 const struct ieee80211vap *vap, 1320 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1321 #endif 1322 { 1323 struct ieee80211_node *ni; 1324 int hash; 1325 #ifdef IEEE80211_DEBUG_REFCNT 1326 char ethstr[ETHER_ADDRSTRLEN + 1]; 1327 #endif 1328 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1329 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1330 if (ni->ni_vap == vap && 1331 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1332 ieee80211_ref_node(ni); /* mark referenced */ 1333 #ifdef IEEE80211_DEBUG_REFCNT 1334 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1335 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1336 func, line, 1337 ni, kether_ntoa(ni->ni_macaddr, ethstr), 1338 ieee80211_node_refcnt(ni)); 1339 #endif 1340 return ni; 1341 } 1342 } 1343 return NULL; 1344 } 1345 1346 struct ieee80211_node * 1347 #ifdef IEEE80211_DEBUG_REFCNT 1348 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1349 const struct ieee80211vap *vap, 1350 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1351 #else 1352 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1353 const struct ieee80211vap *vap, 1354 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1355 #endif 1356 { 1357 struct ieee80211_node *ni; 1358 1359 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1360 return ni; 1361 } 1362 1363 /* 1364 * Fake up a node; this handles node discovery in adhoc mode. 1365 * Note that for the driver's benefit we we treat this like 1366 * an association so the driver has an opportunity to setup 1367 * it's private state. 1368 */ 1369 struct ieee80211_node * 1370 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1371 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1372 { 1373 struct ieee80211_node *ni; 1374 #ifdef IEEE80211_DEBUG 1375 char ethstr[ETHER_ADDRSTRLEN + 1]; 1376 #endif 1377 1378 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1379 "%s: mac<%s>\n", __func__, kether_ntoa(macaddr, ethstr)); 1380 ni = ieee80211_dup_bss(vap, macaddr); 1381 if (ni != NULL) { 1382 struct ieee80211com *ic = vap->iv_ic; 1383 1384 /* XXX no rate negotiation; just dup */ 1385 ni->ni_rates = vap->iv_bss->ni_rates; 1386 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1387 ni->ni_flags |= IEEE80211_NODE_ERP; 1388 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1389 /* 1390 * In adhoc demo mode there are no management 1391 * frames to use to discover neighbor capabilities, 1392 * so blindly propagate the local configuration 1393 * so we can do interesting things (e.g. use 1394 * WME to disable ACK's). 1395 */ 1396 if (vap->iv_flags & IEEE80211_F_WME) 1397 ni->ni_flags |= IEEE80211_NODE_QOS; 1398 #ifdef IEEE80211_SUPPORT_SUPERG 1399 if (vap->iv_flags & IEEE80211_F_FF) 1400 ni->ni_flags |= IEEE80211_NODE_FF; 1401 #endif 1402 } 1403 ieee80211_node_setuptxparms(ni); 1404 if (ic->ic_newassoc != NULL) 1405 ic->ic_newassoc(ni, 1); 1406 /* XXX not right for 802.1x/WPA */ 1407 ieee80211_node_authorize(ni); 1408 } 1409 return ni; 1410 } 1411 1412 void 1413 ieee80211_init_neighbor(struct ieee80211_node *ni, 1414 const struct ieee80211_frame *wh, 1415 const struct ieee80211_scanparams *sp) 1416 { 1417 ni->ni_esslen = sp->ssid[1]; 1418 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1419 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1420 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1421 ni->ni_intval = sp->bintval; 1422 ni->ni_capinfo = sp->capinfo; 1423 ni->ni_chan = ni->ni_ic->ic_curchan; 1424 ni->ni_fhdwell = sp->fhdwell; 1425 ni->ni_fhindex = sp->fhindex; 1426 ni->ni_erp = sp->erp; 1427 ni->ni_timoff = sp->timoff; 1428 #ifdef IEEE80211_SUPPORT_MESH 1429 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1430 ieee80211_mesh_init_neighbor(ni, wh, sp); 1431 #endif 1432 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1433 ieee80211_ies_expand(&ni->ni_ies); 1434 if (ni->ni_ies.wme_ie != NULL) 1435 ni->ni_flags |= IEEE80211_NODE_QOS; 1436 else 1437 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1438 #ifdef IEEE80211_SUPPORT_SUPERG 1439 if (ni->ni_ies.ath_ie != NULL) 1440 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1441 #endif 1442 } 1443 1444 /* NB: must be after ni_chan is setup */ 1445 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1446 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1447 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1448 } 1449 1450 /* 1451 * Do node discovery in adhoc mode on receipt of a beacon 1452 * or probe response frame. Note that for the driver's 1453 * benefit we we treat this like an association so the 1454 * driver has an opportunity to setup it's private state. 1455 */ 1456 struct ieee80211_node * 1457 ieee80211_add_neighbor(struct ieee80211vap *vap, 1458 const struct ieee80211_frame *wh, 1459 const struct ieee80211_scanparams *sp) 1460 { 1461 struct ieee80211_node *ni; 1462 #ifdef IEEE80211_DEBUG 1463 char ethstr[ETHER_ADDRSTRLEN + 1]; 1464 #endif 1465 1466 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1467 "%s: mac<%s>\n", __func__, kether_ntoa(wh->i_addr2, ethstr)); 1468 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1469 if (ni != NULL) { 1470 struct ieee80211com *ic = vap->iv_ic; 1471 1472 ieee80211_init_neighbor(ni, wh, sp); 1473 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1474 ni->ni_flags |= IEEE80211_NODE_ERP; 1475 ieee80211_node_setuptxparms(ni); 1476 if (ic->ic_newassoc != NULL) 1477 ic->ic_newassoc(ni, 1); 1478 /* XXX not right for 802.1x/WPA */ 1479 ieee80211_node_authorize(ni); 1480 } 1481 return ni; 1482 } 1483 1484 #define IS_PROBEREQ(wh) \ 1485 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1486 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1487 #define IS_BCAST_PROBEREQ(wh) \ 1488 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1489 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1490 1491 static __inline struct ieee80211_node * 1492 _find_rxnode(struct ieee80211_node_table *nt, 1493 const struct ieee80211_frame_min *wh) 1494 { 1495 if (IS_BCAST_PROBEREQ(wh)) 1496 return NULL; /* spam bcast probe req to all vap's */ 1497 return ieee80211_find_node_locked(nt, wh->i_addr2); 1498 } 1499 1500 /* 1501 * Locate the node for sender, track state, and then pass the 1502 * (referenced) node up to the 802.11 layer for its use. Note 1503 * we can return NULL if the sender is not in the table. 1504 */ 1505 struct ieee80211_node * 1506 #ifdef IEEE80211_DEBUG_REFCNT 1507 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1508 const struct ieee80211_frame_min *wh, const char *func, int line) 1509 #else 1510 ieee80211_find_rxnode(struct ieee80211com *ic, 1511 const struct ieee80211_frame_min *wh) 1512 #endif 1513 { 1514 struct ieee80211_node_table *nt; 1515 struct ieee80211_node *ni; 1516 1517 nt = &ic->ic_sta; 1518 ni = _find_rxnode(nt, wh); 1519 1520 return ni; 1521 } 1522 1523 /* 1524 * Like ieee80211_find_rxnode but use the supplied h/w 1525 * key index as a hint to locate the node in the key 1526 * mapping table. If an entry is present at the key 1527 * index we return it; otherwise do a normal lookup and 1528 * update the mapping table if the station has a unicast 1529 * key assigned to it. 1530 */ 1531 struct ieee80211_node * 1532 #ifdef IEEE80211_DEBUG_REFCNT 1533 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1534 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1535 const char *func, int line) 1536 #else 1537 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1538 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1539 #endif 1540 { 1541 struct ieee80211_node_table *nt; 1542 struct ieee80211_node *ni; 1543 #ifdef IEEE80211_DEBUG 1544 char ethstr[ETHER_ADDRSTRLEN + 1]; 1545 #endif 1546 1547 nt = &ic->ic_sta; 1548 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1549 ni = nt->nt_keyixmap[keyix]; 1550 else 1551 ni = NULL; 1552 if (ni == NULL) { 1553 ni = _find_rxnode(nt, wh); 1554 if (ni != NULL && nt->nt_keyixmap != NULL) { 1555 /* 1556 * If the station has a unicast key cache slot 1557 * assigned update the key->node mapping table. 1558 */ 1559 keyix = ni->ni_ucastkey.wk_rxkeyix; 1560 /* XXX can keyixmap[keyix] != NULL? */ 1561 if (keyix < nt->nt_keyixmax && 1562 nt->nt_keyixmap[keyix] == NULL) { 1563 IEEE80211_DPRINTF(ni->ni_vap, 1564 IEEE80211_MSG_NODE, 1565 "%s: add key map entry %p<%s> refcnt %d\n", 1566 __func__, ni, kether_ntoa(ni->ni_macaddr, ethstr), 1567 ieee80211_node_refcnt(ni)+1); 1568 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1569 } 1570 } 1571 } else { 1572 if (IS_BCAST_PROBEREQ(wh)) 1573 ni = NULL; /* spam bcast probe req to all vap's */ 1574 else 1575 ieee80211_ref_node(ni); 1576 } 1577 return ni; 1578 } 1579 #undef IS_BCAST_PROBEREQ 1580 #undef IS_PROBEREQ 1581 1582 /* 1583 * Return a reference to the appropriate node for sending 1584 * a data frame. This handles node discovery in adhoc networks. 1585 */ 1586 struct ieee80211_node * 1587 #ifdef IEEE80211_DEBUG_REFCNT 1588 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1589 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1590 const char *func, int line) 1591 #else 1592 ieee80211_find_txnode(struct ieee80211vap *vap, 1593 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1594 #endif 1595 { 1596 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1597 struct ieee80211_node *ni; 1598 1599 /* 1600 * The destination address should be in the node table 1601 * unless this is a multicast/broadcast frame. We can 1602 * also optimize station mode operation, all frames go 1603 * to the bss node. 1604 */ 1605 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1606 if (vap->iv_opmode == IEEE80211_M_STA || 1607 vap->iv_opmode == IEEE80211_M_WDS || 1608 IEEE80211_IS_MULTICAST(macaddr)) 1609 ni = ieee80211_ref_node(vap->iv_bss); 1610 else 1611 ni = ieee80211_find_node_locked(nt, macaddr); 1612 1613 if (ni == NULL) { 1614 if (vap->iv_opmode == IEEE80211_M_IBSS || 1615 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1616 /* 1617 * In adhoc mode cons up a node for the destination. 1618 * Note that we need an additional reference for the 1619 * caller to be consistent with 1620 * ieee80211_find_node_locked. 1621 */ 1622 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1623 if (ni != NULL) 1624 (void) ieee80211_ref_node(ni); 1625 } else { 1626 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1627 "no node, discard frame (%s)", __func__); 1628 vap->iv_stats.is_tx_nonode++; 1629 } 1630 } 1631 return ni; 1632 } 1633 1634 static void 1635 _ieee80211_free_node(struct ieee80211_node *ni) 1636 { 1637 struct ieee80211_node_table *nt = ni->ni_table; 1638 1639 /* 1640 * NB: careful about referencing the vap as it may be 1641 * gone if the last reference was held by a driver. 1642 * We know the com will always be present so it's safe 1643 * to use ni_ic below to reclaim resources. 1644 */ 1645 #if 0 1646 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1647 "%s %p<%s> in %s table\n", __func__, ni, 1648 kether_ntoa(ni->ni_macaddr, ethstr), 1649 nt != NULL ? nt->nt_name : "<gone>"); 1650 #endif 1651 if (ni->ni_associd != 0) { 1652 struct ieee80211vap *vap = ni->ni_vap; 1653 if (vap->iv_aid_bitmap != NULL) 1654 IEEE80211_AID_CLR(vap, ni->ni_associd); 1655 } 1656 if (nt != NULL) { 1657 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1658 LIST_REMOVE(ni, ni_hash); 1659 } 1660 ni->ni_ic->ic_node_free(ni); 1661 } 1662 1663 void 1664 #ifdef IEEE80211_DEBUG_REFCNT 1665 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1666 #else 1667 ieee80211_free_node(struct ieee80211_node *ni) 1668 #endif 1669 { 1670 struct ieee80211_node_table *nt = ni->ni_table; 1671 #ifdef IEEE80211_DEBUG 1672 char ethstr[ETHER_ADDRSTRLEN + 1]; 1673 #endif 1674 1675 #ifdef IEEE80211_DEBUG_REFCNT 1676 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1677 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1678 kether_ntoa(ni->ni_macaddr, ethstr), ieee80211_node_refcnt(ni)-1); 1679 #endif 1680 if (nt != NULL) { 1681 if (ieee80211_node_dectestref(ni)) { 1682 /* 1683 * Last reference, reclaim state. 1684 */ 1685 _ieee80211_free_node(ni); 1686 } else if (ieee80211_node_refcnt(ni) == 1 && 1687 nt->nt_keyixmap != NULL) { 1688 ieee80211_keyix keyix; 1689 /* 1690 * Check for a last reference in the key mapping table. 1691 */ 1692 keyix = ni->ni_ucastkey.wk_rxkeyix; 1693 if (keyix < nt->nt_keyixmax && 1694 nt->nt_keyixmap[keyix] == ni) { 1695 IEEE80211_DPRINTF(ni->ni_vap, 1696 IEEE80211_MSG_NODE, 1697 "%s: %p<%s> clear key map entry", __func__, 1698 ni, kether_ntoa(ni->ni_macaddr, ethstr)); 1699 nt->nt_keyixmap[keyix] = NULL; 1700 ieee80211_node_decref(ni); /* XXX needed? */ 1701 _ieee80211_free_node(ni); 1702 } 1703 } 1704 } else { 1705 if (ieee80211_node_dectestref(ni)) 1706 _ieee80211_free_node(ni); 1707 } 1708 } 1709 1710 /* 1711 * Reclaim a unicast key and clear any key cache state. 1712 */ 1713 int 1714 ieee80211_node_delucastkey(struct ieee80211_node *ni) 1715 { 1716 struct ieee80211com *ic = ni->ni_ic; 1717 struct ieee80211_node_table *nt = &ic->ic_sta; 1718 struct ieee80211_node *nikey; 1719 ieee80211_keyix keyix; 1720 int status; 1721 #ifdef IEEE80211_DEBUG 1722 char ethstr[ETHER_ADDRSTRLEN + 1]; 1723 #endif 1724 1725 /* 1726 * NB: We must beware of LOR here; deleting the key 1727 * can cause the crypto layer to block traffic updates 1728 * which can generate a LOR against the node table lock; 1729 * grab it here and stash the key index for our use below. 1730 * 1731 * Must also beware of recursion on the node table lock. 1732 * When called from node_cleanup we may already have 1733 * the node table lock held. Unfortunately there's no 1734 * way to separate out this path so we must do this 1735 * conditionally. 1736 */ 1737 nikey = NULL; 1738 status = 1; /* NB: success */ 1739 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1740 keyix = ni->ni_ucastkey.wk_rxkeyix; 1741 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1742 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1743 nikey = nt->nt_keyixmap[keyix]; 1744 nt->nt_keyixmap[keyix] = NULL; 1745 } 1746 } 1747 1748 if (nikey != NULL) { 1749 KASSERT(nikey == ni, 1750 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1751 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1752 "%s: delete key map entry %p<%s> refcnt %d\n", 1753 __func__, ni, kether_ntoa(ni->ni_macaddr, ethstr), 1754 ieee80211_node_refcnt(ni)-1); 1755 ieee80211_free_node(ni); 1756 } 1757 return status; 1758 } 1759 1760 /* 1761 * Reclaim a node. If this is the last reference count then 1762 * do the normal free work. Otherwise remove it from the node 1763 * table and mark it gone by clearing the back-reference. 1764 */ 1765 static void 1766 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1767 { 1768 ieee80211_keyix keyix; 1769 #ifdef IEEE80211_DEBUG 1770 char ethstr[ETHER_ADDRSTRLEN + 1]; 1771 #endif 1772 1773 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1774 "%s: remove %p<%s> from %s table, refcnt %d\n", 1775 __func__, ni, kether_ntoa(ni->ni_macaddr, ethstr), 1776 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1777 /* 1778 * Clear any entry in the unicast key mapping table. 1779 * We need to do it here so rx lookups don't find it 1780 * in the mapping table even if it's not in the hash 1781 * table. We cannot depend on the mapping table entry 1782 * being cleared because the node may not be free'd. 1783 */ 1784 keyix = ni->ni_ucastkey.wk_rxkeyix; 1785 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1786 nt->nt_keyixmap[keyix] == ni) { 1787 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1788 "%s: %p<%s> clear key map entry %u\n", 1789 __func__, ni, kether_ntoa(ni->ni_macaddr, ethstr), keyix); 1790 nt->nt_keyixmap[keyix] = NULL; 1791 ieee80211_node_decref(ni); /* NB: don't need free */ 1792 } 1793 if (!ieee80211_node_dectestref(ni)) { 1794 /* 1795 * Other references are present, just remove the 1796 * node from the table so it cannot be found. When 1797 * the references are dropped storage will be 1798 * reclaimed. 1799 */ 1800 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1801 LIST_REMOVE(ni, ni_hash); 1802 ni->ni_table = NULL; /* clear reference */ 1803 } else 1804 _ieee80211_free_node(ni); 1805 } 1806 1807 /* 1808 * Node table support. 1809 */ 1810 1811 static void 1812 ieee80211_node_table_init(struct ieee80211com *ic, 1813 struct ieee80211_node_table *nt, 1814 const char *name, int inact, int keyixmax) 1815 { 1816 nt->nt_ic = ic; 1817 TAILQ_INIT(&nt->nt_node); 1818 nt->nt_name = name; 1819 nt->nt_scangen = 1; 1820 nt->nt_inact_init = inact; 1821 nt->nt_keyixmax = keyixmax; 1822 if (nt->nt_keyixmax > 0) { 1823 nt->nt_keyixmap = (struct ieee80211_node **) kmalloc( 1824 keyixmax * sizeof(struct ieee80211_node *), 1825 M_80211_NODE, M_INTWAIT | M_ZERO); 1826 if (nt->nt_keyixmap == NULL) 1827 if_printf(ic->ic_ifp, 1828 "Cannot allocate key index map with %u entries\n", 1829 keyixmax); 1830 } else 1831 nt->nt_keyixmap = NULL; 1832 } 1833 1834 static void 1835 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1836 struct ieee80211vap *match) 1837 { 1838 struct ieee80211_node *ni, *next; 1839 1840 TAILQ_FOREACH_MUTABLE(ni, &nt->nt_node, ni_list, next) { 1841 if (match != NULL && ni->ni_vap != match) 1842 continue; 1843 /* XXX can this happen? if so need's work */ 1844 if (ni->ni_associd != 0) { 1845 struct ieee80211vap *vap = ni->ni_vap; 1846 1847 if (vap->iv_auth->ia_node_leave != NULL) 1848 vap->iv_auth->ia_node_leave(ni); 1849 if (vap->iv_aid_bitmap != NULL) 1850 IEEE80211_AID_CLR(vap, ni->ni_associd); 1851 } 1852 ni->ni_wdsvap = NULL; /* clear reference */ 1853 node_reclaim(nt, ni); 1854 } 1855 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1856 /* 1857 * Make a separate pass to clear references to this vap 1858 * held by DWDS entries. They will not be matched above 1859 * because ni_vap will point to the ap vap but we still 1860 * need to clear ni_wdsvap when the WDS vap is destroyed 1861 * and/or reset. 1862 */ 1863 TAILQ_FOREACH_MUTABLE(ni, &nt->nt_node, ni_list, next) 1864 if (ni->ni_wdsvap == match) 1865 ni->ni_wdsvap = NULL; 1866 } 1867 } 1868 1869 static void 1870 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1871 { 1872 ieee80211_node_table_reset(nt, NULL); 1873 if (nt->nt_keyixmap != NULL) { 1874 #ifdef DIAGNOSTIC 1875 /* XXX verify all entries are NULL */ 1876 int i; 1877 for (i = 0; i < nt->nt_keyixmax; i++) 1878 if (nt->nt_keyixmap[i] != NULL) 1879 kprintf("%s: %s[%u] still active\n", __func__, 1880 nt->nt_name, i); 1881 #endif 1882 kfree(nt->nt_keyixmap, M_80211_NODE); 1883 nt->nt_keyixmap = NULL; 1884 } 1885 } 1886 1887 /* 1888 * Timeout inactive stations and do related housekeeping. 1889 * Note that we cannot hold the node lock while sending a 1890 * frame as this would lead to a LOR. Instead we use a 1891 * generation number to mark nodes that we've scanned and 1892 * drop the lock and restart a scan if we have to time out 1893 * a node. Since we are single-threaded by virtue of 1894 * controlling the inactivity timer we can be sure this will 1895 * process each node only once. 1896 */ 1897 static void 1898 ieee80211_timeout_stations(struct ieee80211com *ic) 1899 { 1900 struct ieee80211_node_table *nt = &ic->ic_sta; 1901 struct ieee80211vap *vap; 1902 struct ieee80211_node *ni; 1903 int gen = 0; 1904 1905 gen = ++nt->nt_scangen; 1906 restart: 1907 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1908 if (ni->ni_scangen == gen) /* previously handled */ 1909 continue; 1910 ni->ni_scangen = gen; 1911 /* 1912 * Ignore entries for which have yet to receive an 1913 * authentication frame. These are transient and 1914 * will be reclaimed when the last reference to them 1915 * goes away (when frame xmits complete). 1916 */ 1917 vap = ni->ni_vap; 1918 /* 1919 * Only process stations when in RUN state. This 1920 * insures, for example, that we don't timeout an 1921 * inactive station during CAC. Note that CSA state 1922 * is actually handled in ieee80211_node_timeout as 1923 * it applies to more than timeout processing. 1924 */ 1925 if (vap->iv_state != IEEE80211_S_RUN) 1926 continue; 1927 /* XXX can vap be NULL? */ 1928 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1929 vap->iv_opmode == IEEE80211_M_STA) && 1930 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1931 continue; 1932 /* 1933 * Free fragment if not needed anymore 1934 * (last fragment older than 1s). 1935 * XXX doesn't belong here, move to node_age 1936 */ 1937 if (ni->ni_rxfrag[0] != NULL && 1938 ticks > ni->ni_rxfragstamp + hz) { 1939 m_freem(ni->ni_rxfrag[0]); 1940 ni->ni_rxfrag[0] = NULL; 1941 } 1942 if (ni->ni_inact > 0) { 1943 ni->ni_inact--; 1944 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1945 "%s: inact %u inact_reload %u nrates %u", 1946 __func__, ni->ni_inact, ni->ni_inact_reload, 1947 ni->ni_rates.rs_nrates); 1948 } 1949 /* 1950 * Special case ourself; we may be idle for extended periods 1951 * of time and regardless reclaiming our state is wrong. 1952 * XXX run ic_node_age 1953 */ 1954 if (ni == vap->iv_bss) 1955 continue; 1956 if (ni->ni_associd != 0 || 1957 (vap->iv_opmode == IEEE80211_M_IBSS || 1958 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1959 /* 1960 * Age/drain resources held by the station. 1961 */ 1962 ic->ic_node_age(ni); 1963 /* 1964 * Probe the station before time it out. We 1965 * send a null data frame which may not be 1966 * universally supported by drivers (need it 1967 * for ps-poll support so it should be...). 1968 * 1969 * XXX don't probe the station unless we've 1970 * received a frame from them (and have 1971 * some idea of the rates they are capable 1972 * of); this will get fixed more properly 1973 * soon with better handling of the rate set. 1974 */ 1975 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1976 (0 < ni->ni_inact && 1977 ni->ni_inact <= vap->iv_inact_probe) && 1978 ni->ni_rates.rs_nrates != 0) { 1979 IEEE80211_NOTE(vap, 1980 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1981 ni, "%s", 1982 "probe station due to inactivity"); 1983 /* 1984 * Grab a reference before unlocking the table 1985 * so the node cannot be reclaimed before we 1986 * send the frame. ieee80211_send_nulldata 1987 * understands we've done this and reclaims the 1988 * ref for us as needed. 1989 */ 1990 ieee80211_ref_node(ni); 1991 ieee80211_send_nulldata(ni); 1992 /* XXX stat? */ 1993 goto restart; 1994 } 1995 } 1996 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1997 ni->ni_inact <= 0) { 1998 IEEE80211_NOTE(vap, 1999 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2000 "station timed out due to inactivity " 2001 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2002 /* 2003 * Send a deauthenticate frame and drop the station. 2004 * This is somewhat complicated due to reference counts 2005 * and locking. At this point a station will typically 2006 * have a reference count of 1. ieee80211_node_leave 2007 * will do a "free" of the node which will drop the 2008 * reference count. But in the meantime a reference 2009 * wil be held by the deauth frame. The actual reclaim 2010 * of the node will happen either after the tx is 2011 * completed or by ieee80211_node_leave. 2012 * 2013 * Separately we must drop the node lock before sending 2014 * in case the driver takes a lock, as this can result 2015 * in a LOR between the node lock and the driver lock. 2016 */ 2017 ieee80211_ref_node(ni); 2018 if (ni->ni_associd != 0) { 2019 IEEE80211_SEND_MGMT(ni, 2020 IEEE80211_FC0_SUBTYPE_DEAUTH, 2021 IEEE80211_REASON_AUTH_EXPIRE); 2022 } 2023 ieee80211_node_leave(ni); 2024 ieee80211_free_node(ni); 2025 vap->iv_stats.is_node_timeout++; 2026 goto restart; 2027 } 2028 } 2029 } 2030 2031 /* 2032 * Aggressively reclaim resources. This should be used 2033 * only in a critical situation to reclaim mbuf resources. 2034 */ 2035 void 2036 ieee80211_drain(struct ieee80211com *ic) 2037 { 2038 struct ieee80211_node_table *nt = &ic->ic_sta; 2039 struct ieee80211vap *vap; 2040 struct ieee80211_node *ni; 2041 2042 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2043 /* 2044 * Ignore entries for which have yet to receive an 2045 * authentication frame. These are transient and 2046 * will be reclaimed when the last reference to them 2047 * goes away (when frame xmits complete). 2048 */ 2049 vap = ni->ni_vap; 2050 /* 2051 * Only process stations when in RUN state. This 2052 * insures, for example, that we don't timeout an 2053 * inactive station during CAC. Note that CSA state 2054 * is actually handled in ieee80211_node_timeout as 2055 * it applies to more than timeout processing. 2056 */ 2057 if (vap->iv_state != IEEE80211_S_RUN) 2058 continue; 2059 /* XXX can vap be NULL? */ 2060 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2061 vap->iv_opmode == IEEE80211_M_STA) && 2062 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2063 continue; 2064 /* 2065 * Free fragments. 2066 * XXX doesn't belong here, move to node_drain 2067 */ 2068 if (ni->ni_rxfrag[0] != NULL) { 2069 m_freem(ni->ni_rxfrag[0]); 2070 ni->ni_rxfrag[0] = NULL; 2071 } 2072 /* 2073 * Drain resources held by the station. 2074 */ 2075 ic->ic_node_drain(ni); 2076 } 2077 } 2078 2079 /* 2080 * Per-ieee80211com inactivity timer callback. 2081 */ 2082 static void 2083 ieee80211_node_timeout_callout(void *arg) 2084 { 2085 struct ieee80211com *ic = arg; 2086 2087 /* 2088 * Defer timeout processing if a channel switch is pending. 2089 * We typically need to be mute so not doing things that 2090 * might generate frames is good to handle in one place. 2091 * Supressing the station timeout processing may extend the 2092 * lifetime of inactive stations (by not decrementing their 2093 * idle counters) but this should be ok unless the CSA is 2094 * active for an unusually long time. 2095 */ 2096 wlan_serialize_enter(); 2097 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2098 ieee80211_scan_timeout(ic); 2099 ieee80211_timeout_stations(ic); 2100 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2101 2102 ieee80211_erp_timeout(ic); 2103 ieee80211_ht_timeout(ic); 2104 } 2105 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2106 ieee80211_node_timeout_callout, ic); 2107 wlan_serialize_exit(); 2108 } 2109 2110 void 2111 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2112 ieee80211_iter_func *f, void *arg) 2113 { 2114 struct ieee80211_node *ni; 2115 u_int gen; 2116 2117 gen = ++nt->nt_scangen; 2118 restart: 2119 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2120 if (ni->ni_scangen != gen) { 2121 ni->ni_scangen = gen; 2122 (void) ieee80211_ref_node(ni); 2123 (*f)(arg, ni); 2124 ieee80211_free_node(ni); 2125 goto restart; 2126 } 2127 } 2128 } 2129 2130 void 2131 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2132 { 2133 char ethstr[ETHER_ADDRSTRLEN + 1]; 2134 2135 kprintf("0x%p: mac %s refcnt %d\n", ni, kether_ntoa(ni->ni_macaddr, ethstr), 2136 ieee80211_node_refcnt(ni)); 2137 kprintf("\tscangen %u authmode %u flags 0x%x\n", 2138 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2139 kprintf("\tassocid 0x%x txpower %u vlan %u\n", 2140 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2141 kprintf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2142 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2143 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2144 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2145 ni->ni_rxfragstamp); 2146 kprintf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2147 node_getrssi(ni), ni->ni_noise, 2148 ni->ni_intval, ni->ni_capinfo); 2149 kprintf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2150 kether_ntoa(ni->ni_bssid, ethstr), 2151 ni->ni_esslen, ni->ni_essid, 2152 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2153 kprintf("\tinact %u inact_reload %u txrate %u\n", 2154 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2155 kprintf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2156 ni->ni_htcap, ni->ni_htparam, 2157 ni->ni_htctlchan, ni->ni_ht2ndchan); 2158 kprintf("\thtopmode %x htstbc %x chw %u\n", 2159 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2160 } 2161 2162 void 2163 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2164 { 2165 ieee80211_iterate_nodes(nt, 2166 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2167 } 2168 2169 static void 2170 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2171 { 2172 struct ieee80211vap *vap; 2173 2174 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2175 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2176 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2177 } 2178 2179 void 2180 ieee80211_notify_erp(struct ieee80211com *ic) 2181 { 2182 ieee80211_notify_erp_locked(ic); 2183 } 2184 2185 /* 2186 * Handle a station joining an 11g network. 2187 */ 2188 static void 2189 ieee80211_node_join_11g(struct ieee80211_node *ni) 2190 { 2191 struct ieee80211com *ic = ni->ni_ic; 2192 2193 /* 2194 * Station isn't capable of short slot time. Bump 2195 * the count of long slot time stations and disable 2196 * use of short slot time. Note that the actual switch 2197 * over to long slot time use may not occur until the 2198 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2199 */ 2200 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2201 ic->ic_longslotsta++; 2202 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2203 "station needs long slot time, count %d", 2204 ic->ic_longslotsta); 2205 /* XXX vap's w/ conflicting needs won't work */ 2206 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2207 /* 2208 * Don't force slot time when switched to turbo 2209 * mode as non-ERP stations won't be present; this 2210 * need only be done when on the normal G channel. 2211 */ 2212 ieee80211_set_shortslottime(ic, 0); 2213 } 2214 } 2215 /* 2216 * If the new station is not an ERP station 2217 * then bump the counter and enable protection 2218 * if configured. 2219 */ 2220 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2221 ic->ic_nonerpsta++; 2222 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2223 "station is !ERP, %d non-ERP stations associated", 2224 ic->ic_nonerpsta); 2225 /* 2226 * If station does not support short preamble 2227 * then we must enable use of Barker preamble. 2228 */ 2229 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2230 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2231 "%s", "station needs long preamble"); 2232 ic->ic_flags |= IEEE80211_F_USEBARKER; 2233 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2234 } 2235 /* 2236 * If protection is configured and this is the first 2237 * indication we should use protection, enable it. 2238 */ 2239 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2240 ic->ic_nonerpsta == 1 && 2241 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2242 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2243 "%s: enable use of protection\n", __func__); 2244 ic->ic_flags |= IEEE80211_F_USEPROT; 2245 ieee80211_notify_erp_locked(ic); 2246 } 2247 } else 2248 ni->ni_flags |= IEEE80211_NODE_ERP; 2249 } 2250 2251 void 2252 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2253 { 2254 struct ieee80211com *ic = ni->ni_ic; 2255 struct ieee80211vap *vap = ni->ni_vap; 2256 int newassoc; 2257 2258 if (ni->ni_associd == 0) { 2259 uint16_t aid; 2260 2261 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2262 /* 2263 * It would be good to search the bitmap 2264 * more efficiently, but this will do for now. 2265 */ 2266 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2267 if (!IEEE80211_AID_ISSET(vap, aid)) 2268 break; 2269 } 2270 if (aid >= vap->iv_max_aid) { 2271 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2272 ieee80211_node_leave(ni); 2273 return; 2274 } 2275 ni->ni_associd = aid | 0xc000; 2276 ni->ni_jointime = time_uptime; 2277 IEEE80211_AID_SET(vap, ni->ni_associd); 2278 vap->iv_sta_assoc++; 2279 ic->ic_sta_assoc++; 2280 2281 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2282 ieee80211_ht_node_join(ni); 2283 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2284 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2285 ieee80211_node_join_11g(ni); 2286 2287 newassoc = 1; 2288 } else 2289 newassoc = 0; 2290 2291 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2292 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2293 IEEE80211_NODE_AID(ni), 2294 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2295 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2296 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2297 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2298 ni->ni_flags & IEEE80211_NODE_HT ? 2299 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2300 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2301 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2302 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2303 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2304 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2305 ", fast-frames" : "", 2306 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2307 ", turbo" : "" 2308 ); 2309 2310 ieee80211_node_setuptxparms(ni); 2311 /* give driver a chance to setup state like ni_txrate */ 2312 if (ic->ic_newassoc != NULL) 2313 ic->ic_newassoc(ni, newassoc); 2314 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2315 /* tell the authenticator about new station */ 2316 if (vap->iv_auth->ia_node_join != NULL) 2317 vap->iv_auth->ia_node_join(ni); 2318 ieee80211_notify_node_join(ni, 2319 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2320 } 2321 2322 static void 2323 disable_protection(struct ieee80211com *ic) 2324 { 2325 KASSERT(ic->ic_nonerpsta == 0 && 2326 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2327 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2328 ic->ic_flags_ext)); 2329 2330 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2331 /* XXX verify mode? */ 2332 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2333 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2334 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2335 } 2336 ieee80211_notify_erp_locked(ic); 2337 } 2338 2339 /* 2340 * Handle a station leaving an 11g network. 2341 */ 2342 static void 2343 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2344 { 2345 struct ieee80211com *ic = ni->ni_ic; 2346 2347 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2348 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2349 ic->ic_bsschan->ic_flags)); 2350 2351 /* 2352 * If a long slot station do the slot time bookkeeping. 2353 */ 2354 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2355 KASSERT(ic->ic_longslotsta > 0, 2356 ("bogus long slot station count %d", ic->ic_longslotsta)); 2357 ic->ic_longslotsta--; 2358 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2359 "long slot time station leaves, count now %d", 2360 ic->ic_longslotsta); 2361 if (ic->ic_longslotsta == 0) { 2362 /* 2363 * Re-enable use of short slot time if supported 2364 * and not operating in IBSS mode (per spec). 2365 */ 2366 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2367 ic->ic_opmode != IEEE80211_M_IBSS) { 2368 IEEE80211_DPRINTF(ni->ni_vap, 2369 IEEE80211_MSG_ASSOC, 2370 "%s: re-enable use of short slot time\n", 2371 __func__); 2372 ieee80211_set_shortslottime(ic, 1); 2373 } 2374 } 2375 } 2376 /* 2377 * If a non-ERP station do the protection-related bookkeeping. 2378 */ 2379 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2380 KASSERT(ic->ic_nonerpsta > 0, 2381 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2382 ic->ic_nonerpsta--; 2383 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2384 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2385 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2386 " (non-ERP sta present)" : ""); 2387 if (ic->ic_nonerpsta == 0 && 2388 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2389 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2390 "%s: disable use of protection\n", __func__); 2391 disable_protection(ic); 2392 } 2393 } 2394 } 2395 2396 /* 2397 * Time out presence of an overlapping bss with non-ERP 2398 * stations. When operating in hostap mode we listen for 2399 * beacons from other stations and if we identify a non-ERP 2400 * station is present we enable protection. To identify 2401 * when all non-ERP stations are gone we time out this 2402 * condition. 2403 */ 2404 static void 2405 ieee80211_erp_timeout(struct ieee80211com *ic) 2406 { 2407 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2408 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2409 #if 0 2410 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2411 "%s", "age out non-ERP sta present on channel"); 2412 #endif 2413 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2414 if (ic->ic_nonerpsta == 0) 2415 disable_protection(ic); 2416 } 2417 } 2418 2419 /* 2420 * Handle bookkeeping for station deauthentication/disassociation 2421 * when operating as an ap. 2422 */ 2423 void 2424 ieee80211_node_leave(struct ieee80211_node *ni) 2425 { 2426 struct ieee80211com *ic = ni->ni_ic; 2427 struct ieee80211vap *vap = ni->ni_vap; 2428 struct ieee80211_node_table *nt = ni->ni_table; 2429 2430 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2431 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2432 2433 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2434 ("unexpected operating mode %u", vap->iv_opmode)); 2435 /* 2436 * If node wasn't previously associated all 2437 * we need to do is reclaim the reference. 2438 */ 2439 /* XXX ibss mode bypasses 11g and notification */ 2440 if (ni->ni_associd == 0) 2441 goto done; 2442 /* 2443 * Tell the authenticator the station is leaving. 2444 * Note that we must do this before yanking the 2445 * association id as the authenticator uses the 2446 * associd to locate it's state block. 2447 */ 2448 if (vap->iv_auth->ia_node_leave != NULL) 2449 vap->iv_auth->ia_node_leave(ni); 2450 2451 IEEE80211_AID_CLR(vap, ni->ni_associd); 2452 ni->ni_associd = 0; 2453 vap->iv_sta_assoc--; 2454 ic->ic_sta_assoc--; 2455 2456 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2457 ieee80211_ht_node_leave(ni); 2458 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2459 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2460 ieee80211_node_leave_11g(ni); 2461 /* 2462 * Cleanup station state. In particular clear various 2463 * state that might otherwise be reused if the node 2464 * is reused before the reference count goes to zero 2465 * (and memory is reclaimed). 2466 */ 2467 ieee80211_sta_leave(ni); 2468 done: 2469 /* 2470 * Remove the node from any table it's recorded in and 2471 * drop the caller's reference. Removal from the table 2472 * is important to insure the node is not reprocessed 2473 * for inactivity. 2474 */ 2475 if (nt != NULL) { 2476 node_reclaim(nt, ni); 2477 } else 2478 ieee80211_free_node(ni); 2479 } 2480 2481 struct rssiinfo { 2482 struct ieee80211vap *vap; 2483 int rssi_samples; 2484 uint32_t rssi_total; 2485 }; 2486 2487 static void 2488 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2489 { 2490 struct rssiinfo *info = arg; 2491 struct ieee80211vap *vap = ni->ni_vap; 2492 int8_t rssi; 2493 2494 if (info->vap != vap) 2495 return; 2496 /* only associated stations */ 2497 if (ni->ni_associd == 0) 2498 return; 2499 rssi = vap->iv_ic->ic_node_getrssi(ni); 2500 if (rssi != 0) { 2501 info->rssi_samples++; 2502 info->rssi_total += rssi; 2503 } 2504 } 2505 2506 static void 2507 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2508 { 2509 struct rssiinfo *info = arg; 2510 struct ieee80211vap *vap = ni->ni_vap; 2511 int8_t rssi; 2512 2513 if (info->vap != vap) 2514 return; 2515 /* only neighbors */ 2516 /* XXX check bssid */ 2517 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2518 return; 2519 rssi = vap->iv_ic->ic_node_getrssi(ni); 2520 if (rssi != 0) { 2521 info->rssi_samples++; 2522 info->rssi_total += rssi; 2523 } 2524 } 2525 2526 #ifdef IEEE80211_SUPPORT_MESH 2527 static void 2528 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2529 { 2530 struct rssiinfo *info = arg; 2531 struct ieee80211vap *vap = ni->ni_vap; 2532 int8_t rssi; 2533 2534 if (info->vap != vap) 2535 return; 2536 /* only neighbors that peered successfully */ 2537 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2538 return; 2539 rssi = vap->iv_ic->ic_node_getrssi(ni); 2540 if (rssi != 0) { 2541 info->rssi_samples++; 2542 info->rssi_total += rssi; 2543 } 2544 } 2545 #endif /* IEEE80211_SUPPORT_MESH */ 2546 2547 int8_t 2548 ieee80211_getrssi(struct ieee80211vap *vap) 2549 { 2550 #define NZ(x) ((x) == 0 ? 1 : (x)) 2551 struct ieee80211com *ic = vap->iv_ic; 2552 struct rssiinfo info; 2553 2554 info.rssi_total = 0; 2555 info.rssi_samples = 0; 2556 info.vap = vap; 2557 switch (vap->iv_opmode) { 2558 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2559 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2560 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2561 break; 2562 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2563 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2564 break; 2565 #ifdef IEEE80211_SUPPORT_MESH 2566 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2567 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2568 break; 2569 #endif 2570 case IEEE80211_M_MONITOR: /* XXX */ 2571 case IEEE80211_M_STA: /* use stats from associated ap */ 2572 default: 2573 if (vap->iv_bss != NULL) 2574 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2575 info.rssi_samples = 1; 2576 break; 2577 } 2578 return info.rssi_total / NZ(info.rssi_samples); 2579 #undef NZ 2580 } 2581 2582 void 2583 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2584 { 2585 2586 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2587 return; 2588 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2589 /* for non-station mode return avg'd rssi accounting */ 2590 if (vap->iv_opmode != IEEE80211_M_STA) 2591 *rssi = ieee80211_getrssi(vap); 2592 } 2593