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 * $DragonFly$ 28 */ 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_media.h> 42 #include <net/ethernet.h> 43 #include <net/route.h> 44 45 #include <netproto/802_11/ieee80211_var.h> 46 #include <netproto/802_11/ieee80211_input.h> 47 #ifdef IEEE80211_SUPPORT_SUPERG 48 #include <netproto/802_11/ieee80211_superg.h> 49 #endif 50 #ifdef IEEE80211_SUPPORT_TDMA 51 #include <netproto/802_11/ieee80211_tdma.h> 52 #endif 53 #include <netproto/802_11/ieee80211_wds.h> 54 #include <netproto/802_11/ieee80211_mesh.h> 55 #include <netproto/802_11/ieee80211_ratectl.h> 56 57 #include <net/bpf.h> 58 59 /* 60 * IEEE80211_NODE_HASHSIZE must be a power of 2. 61 */ 62 CTASSERT((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 82 static int ieee80211_sta_join1(struct ieee80211_node *); 83 84 static struct ieee80211_node *node_alloc(struct ieee80211vap *, 85 const uint8_t [IEEE80211_ADDR_LEN]); 86 static void node_cleanup(struct ieee80211_node *); 87 static void node_free(struct ieee80211_node *); 88 static void node_age(struct ieee80211_node *); 89 static int8_t node_getrssi(const struct ieee80211_node *); 90 static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 91 static void node_getmimoinfo(const struct ieee80211_node *, 92 struct ieee80211_mimo_info *); 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, 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; 510 511 fail = 0; 512 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 513 fail |= 0x01; 514 if (vap->iv_opmode == IEEE80211_M_IBSS) { 515 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 516 fail |= 0x02; 517 } else { 518 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 519 fail |= 0x02; 520 } 521 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 522 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 523 fail |= 0x04; 524 } else { 525 /* XXX does this mean privacy is supported or required? */ 526 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 527 fail |= 0x04; 528 } 529 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 530 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 531 if (rate & IEEE80211_RATE_BASIC) 532 fail |= 0x08; 533 if (vap->iv_des_nssid != 0 && 534 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 535 fail |= 0x10; 536 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 537 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 538 fail |= 0x20; 539 540 kprintf(" %c %6D", fail ? '-' : '+', ni->ni_macaddr, ":"); 541 kprintf(" %6D%c", ni->ni_bssid, ":", fail & 0x20 ? '!' : ' '); 542 kprintf(" %3d%c", 543 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 544 kprintf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 545 fail & 0x08 ? '!' : ' '); 546 kprintf(" %4s%c", 547 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 548 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 549 "????", 550 fail & 0x02 ? '!' : ' '); 551 kprintf(" %3s%c ", 552 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 553 fail & 0x04 ? '!' : ' '); 554 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 555 kprintf("%s\n", fail & 0x10 ? "!" : ""); 556 } 557 #endif /* IEEE80211_DEBUG */ 558 559 /* 560 * Handle 802.11 ad hoc network merge. The 561 * convention, set by the Wireless Ethernet Compatibility Alliance 562 * (WECA), is that an 802.11 station will change its BSSID to match 563 * the "oldest" 802.11 ad hoc network, on the same channel, that 564 * has the station's desired SSID. The "oldest" 802.11 network 565 * sends beacons with the greatest TSF timestamp. 566 * 567 * The caller is assumed to validate TSF's before attempting a merge. 568 * 569 * Return !0 if the BSSID changed, 0 otherwise. 570 */ 571 int 572 ieee80211_ibss_merge(struct ieee80211_node *ni) 573 { 574 struct ieee80211vap *vap = ni->ni_vap; 575 #ifdef IEEE80211_DEBUG 576 struct ieee80211com *ic = ni->ni_ic; 577 #endif 578 579 if (ni == vap->iv_bss || 580 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 581 /* unchanged, nothing to do */ 582 return 0; 583 } 584 if (!check_bss(vap, ni)) { 585 /* capabilities mismatch */ 586 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 587 "%s: merge failed, capabilities mismatch\n", __func__); 588 #ifdef IEEE80211_DEBUG 589 if (ieee80211_msg_assoc(vap)) 590 check_bss_debug(vap, ni); 591 #endif 592 vap->iv_stats.is_ibss_capmismatch++; 593 return 0; 594 } 595 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 596 "%s: new bssid %6D: %s preamble, %s slot time%s\n", __func__, 597 ni->ni_bssid, ":", 598 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 599 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 600 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 601 ); 602 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 603 } 604 605 /* 606 * Calculate HT channel promotion flags for all vaps. 607 * This assumes ni_chan have been setup for each vap. 608 */ 609 static int 610 gethtadjustflags(struct ieee80211com *ic) 611 { 612 struct ieee80211vap *vap; 613 int flags; 614 615 flags = 0; 616 /* XXX locking */ 617 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 618 if (vap->iv_state < IEEE80211_S_RUN) 619 continue; 620 switch (vap->iv_opmode) { 621 case IEEE80211_M_WDS: 622 case IEEE80211_M_STA: 623 case IEEE80211_M_AHDEMO: 624 case IEEE80211_M_HOSTAP: 625 case IEEE80211_M_IBSS: 626 case IEEE80211_M_MBSS: 627 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 628 break; 629 default: 630 break; 631 } 632 } 633 return flags; 634 } 635 636 /* 637 * Check if the current channel needs to change based on whether 638 * any vap's are using HT20/HT40. This is used to sync the state 639 * of ic_curchan after a channel width change on a running vap. 640 */ 641 void 642 ieee80211_sync_curchan(struct ieee80211com *ic) 643 { 644 struct ieee80211_channel *c; 645 646 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 647 if (c != ic->ic_curchan) { 648 ic->ic_curchan = c; 649 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 650 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 651 IEEE80211_UNLOCK(ic); 652 ic->ic_set_channel(ic); 653 ieee80211_radiotap_chan_change(ic); 654 IEEE80211_LOCK(ic); 655 } 656 } 657 658 /* 659 * Setup the current channel. The request channel may be 660 * promoted if other vap's are operating with HT20/HT40. 661 */ 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 #define N(a) (sizeof(a)/sizeof(a[0])) 957 struct ieee80211vap *vap = ni->ni_vap; 958 struct ieee80211com *ic = ni->ni_ic; 959 int i; 960 961 /* NB: preserve ni_table */ 962 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 963 if (vap->iv_opmode != IEEE80211_M_STA) 964 vap->iv_ps_sta--; 965 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 966 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 967 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 968 } 969 /* 970 * Cleanup any HT-related state. 971 */ 972 if (ni->ni_flags & IEEE80211_NODE_HT) 973 ieee80211_ht_node_cleanup(ni); 974 #ifdef IEEE80211_SUPPORT_SUPERG 975 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 976 ieee80211_ff_node_cleanup(ni); 977 #endif 978 #ifdef IEEE80211_SUPPORT_MESH 979 /* 980 * Cleanup any mesh-related state. 981 */ 982 if (vap->iv_opmode == IEEE80211_M_MBSS) 983 ieee80211_mesh_node_cleanup(ni); 984 #endif 985 /* 986 * Clear any staging queue entries. 987 */ 988 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 989 990 /* 991 * Clear AREF flag that marks the authorization refcnt bump 992 * has happened. This is probably not needed as the node 993 * should always be removed from the table so not found but 994 * do it just in case. 995 * Likewise clear the ASSOCID flag as these flags are intended 996 * to be managed in tandem. 997 */ 998 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 999 1000 /* 1001 * Drain power save queue and, if needed, clear TIM. 1002 */ 1003 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1004 vap->iv_set_tim(ni, 0); 1005 1006 ni->ni_associd = 0; 1007 if (ni->ni_challenge != NULL) { 1008 kfree(ni->ni_challenge, M_80211_NODE); 1009 ni->ni_challenge = NULL; 1010 } 1011 /* 1012 * Preserve SSID, WPA, and WME ie's so the bss node is 1013 * reusable during a re-auth/re-assoc state transition. 1014 * If we remove these data they will not be recreated 1015 * because they come from a probe-response or beacon frame 1016 * which cannot be expected prior to the association-response. 1017 * This should not be an issue when operating in other modes 1018 * as stations leaving always go through a full state transition 1019 * which will rebuild this state. 1020 * 1021 * XXX does this leave us open to inheriting old state? 1022 */ 1023 for (i = 0; i < N(ni->ni_rxfrag); i++) 1024 if (ni->ni_rxfrag[i] != NULL) { 1025 m_freem(ni->ni_rxfrag[i]); 1026 ni->ni_rxfrag[i] = NULL; 1027 } 1028 /* 1029 * Must be careful here to remove any key map entry w/o a LOR. 1030 */ 1031 ieee80211_node_delucastkey(ni); 1032 #undef N 1033 } 1034 1035 static void 1036 node_free(struct ieee80211_node *ni) 1037 { 1038 struct ieee80211com *ic = ni->ni_ic; 1039 1040 ieee80211_ratectl_node_deinit(ni); 1041 ic->ic_node_cleanup(ni); 1042 ieee80211_ies_cleanup(&ni->ni_ies); 1043 ieee80211_psq_cleanup(&ni->ni_psq); 1044 kfree(ni, M_80211_NODE); 1045 } 1046 1047 static void 1048 node_age(struct ieee80211_node *ni) 1049 { 1050 struct ieee80211vap *vap = ni->ni_vap; 1051 1052 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1053 1054 /* 1055 * Age frames on the power save queue. 1056 */ 1057 if (ieee80211_node_psq_age(ni) != 0 && 1058 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1059 vap->iv_set_tim(ni, 0); 1060 /* 1061 * Age out HT resources (e.g. frames on the 1062 * A-MPDU reorder queues). 1063 */ 1064 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1065 ieee80211_ht_node_age(ni); 1066 } 1067 1068 static int8_t 1069 node_getrssi(const struct ieee80211_node *ni) 1070 { 1071 uint32_t avgrssi = ni->ni_avgrssi; 1072 int32_t rssi; 1073 1074 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1075 return 0; 1076 rssi = IEEE80211_RSSI_GET(avgrssi); 1077 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1078 } 1079 1080 static void 1081 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1082 { 1083 *rssi = node_getrssi(ni); 1084 *noise = ni->ni_noise; 1085 } 1086 1087 static void 1088 node_getmimoinfo(const struct ieee80211_node *ni, 1089 struct ieee80211_mimo_info *info) 1090 { 1091 /* XXX zero data? */ 1092 } 1093 1094 struct ieee80211_node * 1095 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1096 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1097 { 1098 struct ieee80211com *ic = nt->nt_ic; 1099 struct ieee80211_node *ni; 1100 int hash; 1101 1102 ni = ic->ic_node_alloc(vap, macaddr); 1103 if (ni == NULL) { 1104 vap->iv_stats.is_rx_nodealloc++; 1105 return NULL; 1106 } 1107 1108 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1109 "%s %p<%6D> in %s table\n", __func__, ni, 1110 macaddr, ":", nt->nt_name); 1111 1112 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1113 hash = IEEE80211_NODE_HASH(ic, macaddr); 1114 ieee80211_node_initref(ni); /* mark referenced */ 1115 ni->ni_chan = IEEE80211_CHAN_ANYC; 1116 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1117 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1118 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1119 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1120 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1121 ni->ni_inact_reload = nt->nt_inact_init; 1122 ni->ni_inact = ni->ni_inact_reload; 1123 ni->ni_ath_defkeyix = 0x7fff; 1124 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1125 #ifdef IEEE80211_SUPPORT_MESH 1126 if (vap->iv_opmode == IEEE80211_M_MBSS) 1127 ieee80211_mesh_node_init(vap, ni); 1128 #endif 1129 IEEE80211_NODE_LOCK(nt); 1130 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1131 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1132 ni->ni_table = nt; 1133 ni->ni_vap = vap; 1134 ni->ni_ic = ic; 1135 IEEE80211_NODE_UNLOCK(nt); 1136 1137 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1138 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1139 1140 return ni; 1141 } 1142 1143 /* 1144 * Craft a temporary node suitable for sending a management frame 1145 * to the specified station. We craft only as much state as we 1146 * need to do the work since the node will be immediately reclaimed 1147 * once the send completes. 1148 */ 1149 struct ieee80211_node * 1150 ieee80211_tmp_node(struct ieee80211vap *vap, 1151 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1152 { 1153 struct ieee80211com *ic = vap->iv_ic; 1154 struct ieee80211_node *ni; 1155 1156 ni = ic->ic_node_alloc(vap, macaddr); 1157 if (ni != NULL) { 1158 struct ieee80211_node *bss = vap->iv_bss; 1159 1160 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1161 "%s %p<%6D>\n", __func__, ni, macaddr, ":"); 1162 1163 ni->ni_table = NULL; /* NB: pedantic */ 1164 ni->ni_ic = ic; /* NB: needed to set channel */ 1165 ni->ni_vap = vap; 1166 1167 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1168 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1169 ieee80211_node_initref(ni); /* mark referenced */ 1170 /* NB: required by ieee80211_fix_rate */ 1171 ieee80211_node_set_chan(ni, bss->ni_chan); 1172 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1173 IEEE80211_KEYIX_NONE); 1174 ni->ni_txpower = bss->ni_txpower; 1175 /* XXX optimize away */ 1176 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1177 } else { 1178 /* XXX msg */ 1179 vap->iv_stats.is_rx_nodealloc++; 1180 } 1181 return ni; 1182 } 1183 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 1278 IEEE80211_NODE_LOCK_ASSERT(nt); 1279 1280 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1281 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1282 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1283 ieee80211_ref_node(ni); /* mark referenced */ 1284 #ifdef IEEE80211_DEBUG_REFCNT 1285 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1286 "%s (%s:%u) %p<%6D> refcnt %d\n", __func__, 1287 func, line, 1288 ni, ni->ni_macaddr, ":", 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 IEEE80211_NODE_LOCK(nt); 1309 ni = ieee80211_find_node_locked(nt, macaddr); 1310 IEEE80211_NODE_UNLOCK(nt); 1311 return ni; 1312 } 1313 1314 struct ieee80211_node * 1315 #ifdef IEEE80211_DEBUG_REFCNT 1316 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1317 const struct ieee80211vap *vap, 1318 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1319 #else 1320 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1321 const struct ieee80211vap *vap, 1322 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1323 #endif 1324 { 1325 struct ieee80211_node *ni; 1326 int hash; 1327 1328 IEEE80211_NODE_LOCK_ASSERT(nt); 1329 1330 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1331 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1332 if (ni->ni_vap == vap && 1333 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1334 ieee80211_ref_node(ni); /* mark referenced */ 1335 #ifdef IEEE80211_DEBUG_REFCNT 1336 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1337 "%s (%s:%u) %p<%6D> refcnt %d\n", __func__, 1338 func, line, 1339 ni, ni->ni_macaddr, ":", 1340 ieee80211_node_refcnt(ni)); 1341 #endif 1342 return ni; 1343 } 1344 } 1345 return NULL; 1346 } 1347 1348 struct ieee80211_node * 1349 #ifdef IEEE80211_DEBUG_REFCNT 1350 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1351 const struct ieee80211vap *vap, 1352 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1353 #else 1354 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1355 const struct ieee80211vap *vap, 1356 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1357 #endif 1358 { 1359 struct ieee80211_node *ni; 1360 1361 IEEE80211_NODE_LOCK(nt); 1362 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1363 IEEE80211_NODE_UNLOCK(nt); 1364 return ni; 1365 } 1366 1367 /* 1368 * Fake up a node; this handles node discovery in adhoc mode. 1369 * Note that for the driver's benefit we we treat this like 1370 * an association so the driver has an opportunity to setup 1371 * it's private state. 1372 */ 1373 struct ieee80211_node * 1374 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1375 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1376 { 1377 struct ieee80211_node *ni; 1378 1379 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1380 "%s: mac<%6D>\n", __func__, macaddr, ":"); 1381 ni = ieee80211_dup_bss(vap, macaddr); 1382 if (ni != NULL) { 1383 struct ieee80211com *ic = vap->iv_ic; 1384 1385 /* XXX no rate negotiation; just dup */ 1386 ni->ni_rates = vap->iv_bss->ni_rates; 1387 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1388 ni->ni_flags |= IEEE80211_NODE_ERP; 1389 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1390 /* 1391 * In adhoc demo mode there are no management 1392 * frames to use to discover neighbor capabilities, 1393 * so blindly propagate the local configuration 1394 * so we can do interesting things (e.g. use 1395 * WME to disable ACK's). 1396 */ 1397 if (vap->iv_flags & IEEE80211_F_WME) 1398 ni->ni_flags |= IEEE80211_NODE_QOS; 1399 #ifdef IEEE80211_SUPPORT_SUPERG 1400 if (vap->iv_flags & IEEE80211_F_FF) 1401 ni->ni_flags |= IEEE80211_NODE_FF; 1402 #endif 1403 } 1404 ieee80211_node_setuptxparms(ni); 1405 if (ic->ic_newassoc != NULL) 1406 ic->ic_newassoc(ni, 1); 1407 /* XXX not right for 802.1x/WPA */ 1408 ieee80211_node_authorize(ni); 1409 } 1410 return ni; 1411 } 1412 1413 void 1414 ieee80211_init_neighbor(struct ieee80211_node *ni, 1415 const struct ieee80211_frame *wh, 1416 const struct ieee80211_scanparams *sp) 1417 { 1418 ni->ni_esslen = sp->ssid[1]; 1419 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1420 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1421 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1422 ni->ni_intval = sp->bintval; 1423 ni->ni_capinfo = sp->capinfo; 1424 ni->ni_chan = ni->ni_ic->ic_curchan; 1425 ni->ni_fhdwell = sp->fhdwell; 1426 ni->ni_fhindex = sp->fhindex; 1427 ni->ni_erp = sp->erp; 1428 ni->ni_timoff = sp->timoff; 1429 #ifdef IEEE80211_SUPPORT_MESH 1430 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1431 ieee80211_mesh_init_neighbor(ni, wh, sp); 1432 #endif 1433 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1434 ieee80211_ies_expand(&ni->ni_ies); 1435 if (ni->ni_ies.wme_ie != NULL) 1436 ni->ni_flags |= IEEE80211_NODE_QOS; 1437 else 1438 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1439 #ifdef IEEE80211_SUPPORT_SUPERG 1440 if (ni->ni_ies.ath_ie != NULL) 1441 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1442 #endif 1443 } 1444 1445 /* NB: must be after ni_chan is setup */ 1446 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1447 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1448 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1449 } 1450 1451 /* 1452 * Do node discovery in adhoc mode on receipt of a beacon 1453 * or probe response frame. Note that for the driver's 1454 * benefit we we treat this like an association so the 1455 * driver has an opportunity to setup it's private state. 1456 */ 1457 struct ieee80211_node * 1458 ieee80211_add_neighbor(struct ieee80211vap *vap, 1459 const struct ieee80211_frame *wh, 1460 const struct ieee80211_scanparams *sp) 1461 { 1462 struct ieee80211_node *ni; 1463 1464 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1465 "%s: mac<%6D>\n", __func__, wh->i_addr2, ":"); 1466 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1467 if (ni != NULL) { 1468 struct ieee80211com *ic = vap->iv_ic; 1469 1470 ieee80211_init_neighbor(ni, wh, sp); 1471 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1472 ni->ni_flags |= IEEE80211_NODE_ERP; 1473 ieee80211_node_setuptxparms(ni); 1474 if (ic->ic_newassoc != NULL) 1475 ic->ic_newassoc(ni, 1); 1476 /* XXX not right for 802.1x/WPA */ 1477 ieee80211_node_authorize(ni); 1478 } 1479 return ni; 1480 } 1481 1482 #define IS_PROBEREQ(wh) \ 1483 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1484 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1485 #define IS_BCAST_PROBEREQ(wh) \ 1486 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1487 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1488 1489 static __inline struct ieee80211_node * 1490 _find_rxnode(struct ieee80211_node_table *nt, 1491 const struct ieee80211_frame_min *wh) 1492 { 1493 if (IS_BCAST_PROBEREQ(wh)) 1494 return NULL; /* spam bcast probe req to all vap's */ 1495 return ieee80211_find_node_locked(nt, wh->i_addr2); 1496 } 1497 1498 /* 1499 * Locate the node for sender, track state, and then pass the 1500 * (referenced) node up to the 802.11 layer for its use. Note 1501 * we can return NULL if the sender is not in the table. 1502 */ 1503 struct ieee80211_node * 1504 #ifdef IEEE80211_DEBUG_REFCNT 1505 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1506 const struct ieee80211_frame_min *wh, const char *func, int line) 1507 #else 1508 ieee80211_find_rxnode(struct ieee80211com *ic, 1509 const struct ieee80211_frame_min *wh) 1510 #endif 1511 { 1512 struct ieee80211_node_table *nt; 1513 struct ieee80211_node *ni; 1514 1515 nt = &ic->ic_sta; 1516 IEEE80211_NODE_LOCK(nt); 1517 ni = _find_rxnode(nt, wh); 1518 IEEE80211_NODE_UNLOCK(nt); 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 1544 nt = &ic->ic_sta; 1545 IEEE80211_NODE_LOCK(nt); 1546 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1547 ni = nt->nt_keyixmap[keyix]; 1548 else 1549 ni = NULL; 1550 if (ni == NULL) { 1551 ni = _find_rxnode(nt, wh); 1552 if (ni != NULL && nt->nt_keyixmap != NULL) { 1553 /* 1554 * If the station has a unicast key cache slot 1555 * assigned update the key->node mapping table. 1556 */ 1557 keyix = ni->ni_ucastkey.wk_rxkeyix; 1558 /* XXX can keyixmap[keyix] != NULL? */ 1559 if (keyix < nt->nt_keyixmax && 1560 nt->nt_keyixmap[keyix] == NULL) { 1561 IEEE80211_DPRINTF(ni->ni_vap, 1562 IEEE80211_MSG_NODE, 1563 "%s: add key map entry %p<%6D> refcnt %d\n", 1564 __func__, ni, ni->ni_macaddr, ":", 1565 ieee80211_node_refcnt(ni)+1); 1566 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1567 } 1568 } 1569 } else { 1570 if (IS_BCAST_PROBEREQ(wh)) 1571 ni = NULL; /* spam bcast probe req to all vap's */ 1572 else 1573 ieee80211_ref_node(ni); 1574 } 1575 IEEE80211_NODE_UNLOCK(nt); 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 IEEE80211_NODE_LOCK(nt); 1607 if (vap->iv_opmode == IEEE80211_M_STA || 1608 vap->iv_opmode == IEEE80211_M_WDS || 1609 IEEE80211_IS_MULTICAST(macaddr)) 1610 ni = ieee80211_ref_node(vap->iv_bss); 1611 else 1612 ni = ieee80211_find_node_locked(nt, macaddr); 1613 IEEE80211_NODE_UNLOCK(nt); 1614 1615 if (ni == NULL) { 1616 if (vap->iv_opmode == IEEE80211_M_IBSS || 1617 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1618 /* 1619 * In adhoc mode cons up a node for the destination. 1620 * Note that we need an additional reference for the 1621 * caller to be consistent with 1622 * ieee80211_find_node_locked. 1623 */ 1624 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1625 if (ni != NULL) 1626 (void) ieee80211_ref_node(ni); 1627 } else { 1628 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1629 "no node, discard frame (%s)", __func__); 1630 vap->iv_stats.is_tx_nonode++; 1631 } 1632 } 1633 return ni; 1634 } 1635 1636 static void 1637 _ieee80211_free_node(struct ieee80211_node *ni) 1638 { 1639 struct ieee80211_node_table *nt = ni->ni_table; 1640 1641 /* 1642 * NB: careful about referencing the vap as it may be 1643 * gone if the last reference was held by a driver. 1644 * We know the com will always be present so it's safe 1645 * to use ni_ic below to reclaim resources. 1646 */ 1647 #if 0 1648 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1649 "%s %p<%6D> in %s table\n", __func__, ni, 1650 ni->ni_macaddr, ":", 1651 nt != NULL ? nt->nt_name : "<gone>"); 1652 #endif 1653 if (ni->ni_associd != 0) { 1654 struct ieee80211vap *vap = ni->ni_vap; 1655 if (vap->iv_aid_bitmap != NULL) 1656 IEEE80211_AID_CLR(vap, ni->ni_associd); 1657 } 1658 if (nt != NULL) { 1659 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1660 LIST_REMOVE(ni, ni_hash); 1661 } 1662 ni->ni_ic->ic_node_free(ni); 1663 } 1664 1665 void 1666 #ifdef IEEE80211_DEBUG_REFCNT 1667 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1668 #else 1669 ieee80211_free_node(struct ieee80211_node *ni) 1670 #endif 1671 { 1672 struct ieee80211_node_table *nt = ni->ni_table; 1673 1674 #ifdef IEEE80211_DEBUG_REFCNT 1675 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1676 "%s (%s:%u) %p<%6D> refcnt %d\n", __func__, func, line, ni, 1677 ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)-1); 1678 #endif 1679 if (nt != NULL) { 1680 IEEE80211_NODE_LOCK(nt); 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<%6D> clear key map entry", __func__, 1698 ni, ni->ni_macaddr, ":"); 1699 nt->nt_keyixmap[keyix] = NULL; 1700 ieee80211_node_decref(ni); /* XXX needed? */ 1701 _ieee80211_free_node(ni); 1702 } 1703 } 1704 IEEE80211_NODE_UNLOCK(nt); 1705 } else { 1706 if (ieee80211_node_dectestref(ni)) 1707 _ieee80211_free_node(ni); 1708 } 1709 } 1710 1711 /* 1712 * Reclaim a unicast key and clear any key cache state. 1713 */ 1714 int 1715 ieee80211_node_delucastkey(struct ieee80211_node *ni) 1716 { 1717 struct ieee80211com *ic = ni->ni_ic; 1718 struct ieee80211_node_table *nt = &ic->ic_sta; 1719 struct ieee80211_node *nikey; 1720 ieee80211_keyix keyix; 1721 int isowned, status; 1722 1723 /* 1724 * NB: We must beware of LOR here; deleting the key 1725 * can cause the crypto layer to block traffic updates 1726 * which can generate a LOR against the node table lock; 1727 * grab it here and stash the key index for our use below. 1728 * 1729 * Must also beware of recursion on the node table lock. 1730 * When called from node_cleanup we may already have 1731 * the node table lock held. Unfortunately there's no 1732 * way to separate out this path so we must do this 1733 * conditionally. 1734 */ 1735 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1736 if (!isowned) 1737 IEEE80211_NODE_LOCK(nt); 1738 nikey = NULL; 1739 status = 1; /* NB: success */ 1740 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1741 keyix = ni->ni_ucastkey.wk_rxkeyix; 1742 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1743 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1744 nikey = nt->nt_keyixmap[keyix]; 1745 nt->nt_keyixmap[keyix] = NULL; 1746 } 1747 } 1748 if (!isowned) 1749 IEEE80211_NODE_UNLOCK(nt); 1750 1751 if (nikey != NULL) { 1752 KASSERT(nikey == ni, 1753 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1754 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1755 "%s: delete key map entry %p<%6D> refcnt %d\n", 1756 __func__, ni, ni->ni_macaddr, ":", 1757 ieee80211_node_refcnt(ni)-1); 1758 ieee80211_free_node(ni); 1759 } 1760 return status; 1761 } 1762 1763 /* 1764 * Reclaim a node. If this is the last reference count then 1765 * do the normal free work. Otherwise remove it from the node 1766 * table and mark it gone by clearing the back-reference. 1767 */ 1768 static void 1769 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1770 { 1771 ieee80211_keyix keyix; 1772 1773 IEEE80211_NODE_LOCK_ASSERT(nt); 1774 1775 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1776 "%s: remove %p<%6D> from %s table, refcnt %d\n", 1777 __func__, ni, ni->ni_macaddr, ":", 1778 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1779 /* 1780 * Clear any entry in the unicast key mapping table. 1781 * We need to do it here so rx lookups don't find it 1782 * in the mapping table even if it's not in the hash 1783 * table. We cannot depend on the mapping table entry 1784 * being cleared because the node may not be free'd. 1785 */ 1786 keyix = ni->ni_ucastkey.wk_rxkeyix; 1787 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1788 nt->nt_keyixmap[keyix] == ni) { 1789 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1790 "%s: %p<%6D> clear key map entry %u\n", 1791 __func__, ni, ni->ni_macaddr, ":", keyix); 1792 nt->nt_keyixmap[keyix] = NULL; 1793 ieee80211_node_decref(ni); /* NB: don't need free */ 1794 } 1795 if (!ieee80211_node_dectestref(ni)) { 1796 /* 1797 * Other references are present, just remove the 1798 * node from the table so it cannot be found. When 1799 * the references are dropped storage will be 1800 * reclaimed. 1801 */ 1802 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1803 LIST_REMOVE(ni, ni_hash); 1804 ni->ni_table = NULL; /* clear reference */ 1805 } else 1806 _ieee80211_free_node(ni); 1807 } 1808 1809 /* 1810 * Node table support. 1811 */ 1812 1813 static void 1814 ieee80211_node_table_init(struct ieee80211com *ic, 1815 struct ieee80211_node_table *nt, 1816 const char *name, int inact, int keyixmax) 1817 { 1818 struct ifnet *ifp = ic->ic_ifp; 1819 1820 nt->nt_ic = ic; 1821 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1822 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1823 TAILQ_INIT(&nt->nt_node); 1824 nt->nt_name = name; 1825 nt->nt_scangen = 1; 1826 nt->nt_inact_init = inact; 1827 nt->nt_keyixmax = keyixmax; 1828 if (nt->nt_keyixmax > 0) { 1829 nt->nt_keyixmap = (struct ieee80211_node **) kmalloc( 1830 keyixmax * sizeof(struct ieee80211_node *), 1831 M_80211_NODE, M_INTWAIT | M_ZERO); 1832 if (nt->nt_keyixmap == NULL) 1833 if_printf(ic->ic_ifp, 1834 "Cannot allocate key index map with %u entries\n", 1835 keyixmax); 1836 } else 1837 nt->nt_keyixmap = NULL; 1838 } 1839 1840 static void 1841 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1842 struct ieee80211vap *match) 1843 { 1844 struct ieee80211_node *ni, *next; 1845 1846 IEEE80211_NODE_LOCK(nt); 1847 TAILQ_FOREACH_MUTABLE(ni, &nt->nt_node, ni_list, next) { 1848 if (match != NULL && ni->ni_vap != match) 1849 continue; 1850 /* XXX can this happen? if so need's work */ 1851 if (ni->ni_associd != 0) { 1852 struct ieee80211vap *vap = ni->ni_vap; 1853 1854 if (vap->iv_auth->ia_node_leave != NULL) 1855 vap->iv_auth->ia_node_leave(ni); 1856 if (vap->iv_aid_bitmap != NULL) 1857 IEEE80211_AID_CLR(vap, ni->ni_associd); 1858 } 1859 ni->ni_wdsvap = NULL; /* clear reference */ 1860 node_reclaim(nt, ni); 1861 } 1862 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1863 /* 1864 * Make a separate pass to clear references to this vap 1865 * held by DWDS entries. They will not be matched above 1866 * because ni_vap will point to the ap vap but we still 1867 * need to clear ni_wdsvap when the WDS vap is destroyed 1868 * and/or reset. 1869 */ 1870 TAILQ_FOREACH_MUTABLE(ni, &nt->nt_node, ni_list, next) 1871 if (ni->ni_wdsvap == match) 1872 ni->ni_wdsvap = NULL; 1873 } 1874 IEEE80211_NODE_UNLOCK(nt); 1875 } 1876 1877 static void 1878 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1879 { 1880 ieee80211_node_table_reset(nt, NULL); 1881 if (nt->nt_keyixmap != NULL) { 1882 #ifdef DIAGNOSTIC 1883 /* XXX verify all entries are NULL */ 1884 int i; 1885 for (i = 0; i < nt->nt_keyixmax; i++) 1886 if (nt->nt_keyixmap[i] != NULL) 1887 kprintf("%s: %s[%u] still active\n", __func__, 1888 nt->nt_name, i); 1889 #endif 1890 kfree(nt->nt_keyixmap, M_80211_NODE); 1891 nt->nt_keyixmap = NULL; 1892 } 1893 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1894 IEEE80211_NODE_LOCK_DESTROY(nt); 1895 } 1896 1897 /* 1898 * Timeout inactive stations and do related housekeeping. 1899 * Note that we cannot hold the node lock while sending a 1900 * frame as this would lead to a LOR. Instead we use a 1901 * generation number to mark nodes that we've scanned and 1902 * drop the lock and restart a scan if we have to time out 1903 * a node. Since we are single-threaded by virtue of 1904 * controlling the inactivity timer we can be sure this will 1905 * process each node only once. 1906 */ 1907 static void 1908 ieee80211_timeout_stations(struct ieee80211com *ic) 1909 { 1910 struct ieee80211_node_table *nt = &ic->ic_sta; 1911 struct ieee80211vap *vap; 1912 struct ieee80211_node *ni; 1913 int gen = 0; 1914 1915 IEEE80211_NODE_ITERATE_LOCK(nt); 1916 gen = ++nt->nt_scangen; 1917 restart: 1918 IEEE80211_NODE_LOCK(nt); 1919 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1920 if (ni->ni_scangen == gen) /* previously handled */ 1921 continue; 1922 ni->ni_scangen = gen; 1923 /* 1924 * Ignore entries for which have yet to receive an 1925 * authentication frame. These are transient and 1926 * will be reclaimed when the last reference to them 1927 * goes away (when frame xmits complete). 1928 */ 1929 vap = ni->ni_vap; 1930 /* 1931 * Only process stations when in RUN state. This 1932 * insures, for example, that we don't timeout an 1933 * inactive station during CAC. Note that CSA state 1934 * is actually handled in ieee80211_node_timeout as 1935 * it applies to more than timeout processing. 1936 */ 1937 if (vap->iv_state != IEEE80211_S_RUN) 1938 continue; 1939 /* XXX can vap be NULL? */ 1940 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1941 vap->iv_opmode == IEEE80211_M_STA) && 1942 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1943 continue; 1944 /* 1945 * Free fragment if not needed anymore 1946 * (last fragment older than 1s). 1947 * XXX doesn't belong here, move to node_age 1948 */ 1949 if (ni->ni_rxfrag[0] != NULL && 1950 ticks > ni->ni_rxfragstamp + hz) { 1951 m_freem(ni->ni_rxfrag[0]); 1952 ni->ni_rxfrag[0] = NULL; 1953 } 1954 if (ni->ni_inact > 0) { 1955 ni->ni_inact--; 1956 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1957 "%s: inact %u inact_reload %u nrates %u", 1958 __func__, ni->ni_inact, ni->ni_inact_reload, 1959 ni->ni_rates.rs_nrates); 1960 } 1961 /* 1962 * Special case ourself; we may be idle for extended periods 1963 * of time and regardless reclaiming our state is wrong. 1964 * XXX run ic_node_age 1965 */ 1966 if (ni == vap->iv_bss) 1967 continue; 1968 if (ni->ni_associd != 0 || 1969 (vap->iv_opmode == IEEE80211_M_IBSS || 1970 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1971 /* 1972 * Age/drain resources held by the station. 1973 */ 1974 ic->ic_node_age(ni); 1975 /* 1976 * Probe the station before time it out. We 1977 * send a null data frame which may not be 1978 * universally supported by drivers (need it 1979 * for ps-poll support so it should be...). 1980 * 1981 * XXX don't probe the station unless we've 1982 * received a frame from them (and have 1983 * some idea of the rates they are capable 1984 * of); this will get fixed more properly 1985 * soon with better handling of the rate set. 1986 */ 1987 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1988 (0 < ni->ni_inact && 1989 ni->ni_inact <= vap->iv_inact_probe) && 1990 ni->ni_rates.rs_nrates != 0) { 1991 IEEE80211_NOTE(vap, 1992 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1993 ni, "%s", 1994 "probe station due to inactivity"); 1995 /* 1996 * Grab a reference before unlocking the table 1997 * so the node cannot be reclaimed before we 1998 * send the frame. ieee80211_send_nulldata 1999 * understands we've done this and reclaims the 2000 * ref for us as needed. 2001 */ 2002 ieee80211_ref_node(ni); 2003 IEEE80211_NODE_UNLOCK(nt); 2004 ieee80211_send_nulldata(ni); 2005 /* XXX stat? */ 2006 goto restart; 2007 } 2008 } 2009 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2010 ni->ni_inact <= 0) { 2011 IEEE80211_NOTE(vap, 2012 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2013 "station timed out due to inactivity " 2014 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2015 /* 2016 * Send a deauthenticate frame and drop the station. 2017 * This is somewhat complicated due to reference counts 2018 * and locking. At this point a station will typically 2019 * have a reference count of 1. ieee80211_node_leave 2020 * will do a "free" of the node which will drop the 2021 * reference count. But in the meantime a reference 2022 * wil be held by the deauth frame. The actual reclaim 2023 * of the node will happen either after the tx is 2024 * completed or by ieee80211_node_leave. 2025 * 2026 * Separately we must drop the node lock before sending 2027 * in case the driver takes a lock, as this can result 2028 * in a LOR between the node lock and the driver lock. 2029 */ 2030 ieee80211_ref_node(ni); 2031 IEEE80211_NODE_UNLOCK(nt); 2032 if (ni->ni_associd != 0) { 2033 IEEE80211_SEND_MGMT(ni, 2034 IEEE80211_FC0_SUBTYPE_DEAUTH, 2035 IEEE80211_REASON_AUTH_EXPIRE); 2036 } 2037 ieee80211_node_leave(ni); 2038 ieee80211_free_node(ni); 2039 vap->iv_stats.is_node_timeout++; 2040 goto restart; 2041 } 2042 } 2043 IEEE80211_NODE_UNLOCK(nt); 2044 2045 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2046 } 2047 2048 /* 2049 * Aggressively reclaim resources. This should be used 2050 * only in a critical situation to reclaim mbuf resources. 2051 */ 2052 void 2053 ieee80211_drain(struct ieee80211com *ic) 2054 { 2055 struct ieee80211_node_table *nt = &ic->ic_sta; 2056 struct ieee80211vap *vap; 2057 struct ieee80211_node *ni; 2058 2059 IEEE80211_NODE_LOCK(nt); 2060 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2061 /* 2062 * Ignore entries for which have yet to receive an 2063 * authentication frame. These are transient and 2064 * will be reclaimed when the last reference to them 2065 * goes away (when frame xmits complete). 2066 */ 2067 vap = ni->ni_vap; 2068 /* 2069 * Only process stations when in RUN state. This 2070 * insures, for example, that we don't timeout an 2071 * inactive station during CAC. Note that CSA state 2072 * is actually handled in ieee80211_node_timeout as 2073 * it applies to more than timeout processing. 2074 */ 2075 if (vap->iv_state != IEEE80211_S_RUN) 2076 continue; 2077 /* XXX can vap be NULL? */ 2078 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2079 vap->iv_opmode == IEEE80211_M_STA) && 2080 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2081 continue; 2082 /* 2083 * Free fragments. 2084 * XXX doesn't belong here, move to node_drain 2085 */ 2086 if (ni->ni_rxfrag[0] != NULL) { 2087 m_freem(ni->ni_rxfrag[0]); 2088 ni->ni_rxfrag[0] = NULL; 2089 } 2090 /* 2091 * Drain resources held by the station. 2092 */ 2093 ic->ic_node_drain(ni); 2094 } 2095 IEEE80211_NODE_UNLOCK(nt); 2096 } 2097 2098 /* 2099 * Per-ieee80211com inactivity timer callback. 2100 */ 2101 void 2102 ieee80211_node_timeout(void *arg) 2103 { 2104 struct ieee80211com *ic = arg; 2105 2106 /* 2107 * Defer timeout processing if a channel switch is pending. 2108 * We typically need to be mute so not doing things that 2109 * might generate frames is good to handle in one place. 2110 * Supressing the station timeout processing may extend the 2111 * lifetime of inactive stations (by not decrementing their 2112 * idle counters) but this should be ok unless the CSA is 2113 * active for an unusually long time. 2114 */ 2115 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2116 ieee80211_scan_timeout(ic); 2117 ieee80211_timeout_stations(ic); 2118 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2119 2120 IEEE80211_LOCK(ic); 2121 ieee80211_erp_timeout(ic); 2122 ieee80211_ht_timeout(ic); 2123 IEEE80211_UNLOCK(ic); 2124 } 2125 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2126 ieee80211_node_timeout, ic); 2127 } 2128 2129 void 2130 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2131 ieee80211_iter_func *f, void *arg) 2132 { 2133 struct ieee80211_node *ni; 2134 u_int gen; 2135 2136 IEEE80211_NODE_ITERATE_LOCK(nt); 2137 gen = ++nt->nt_scangen; 2138 restart: 2139 IEEE80211_NODE_LOCK(nt); 2140 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2141 if (ni->ni_scangen != gen) { 2142 ni->ni_scangen = gen; 2143 (void) ieee80211_ref_node(ni); 2144 IEEE80211_NODE_UNLOCK(nt); 2145 (*f)(arg, ni); 2146 ieee80211_free_node(ni); 2147 goto restart; 2148 } 2149 } 2150 IEEE80211_NODE_UNLOCK(nt); 2151 2152 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2153 } 2154 2155 void 2156 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2157 { 2158 kprintf("0x%p: mac %6D refcnt %d\n", ni, ni->ni_macaddr, ":", 2159 ieee80211_node_refcnt(ni)); 2160 kprintf("\tscangen %u authmode %u flags 0x%x\n", 2161 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2162 kprintf("\tassocid 0x%x txpower %u vlan %u\n", 2163 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2164 kprintf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2165 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2166 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2167 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2168 ni->ni_rxfragstamp); 2169 kprintf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2170 node_getrssi(ni), ni->ni_noise, 2171 ni->ni_intval, ni->ni_capinfo); 2172 kprintf("\tbssid %6D essid \"%.*s\" channel %u:0x%x\n", 2173 ni->ni_bssid, ":", 2174 ni->ni_esslen, ni->ni_essid, 2175 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2176 kprintf("\tinact %u inact_reload %u txrate %u\n", 2177 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2178 kprintf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2179 ni->ni_htcap, ni->ni_htparam, 2180 ni->ni_htctlchan, ni->ni_ht2ndchan); 2181 kprintf("\thtopmode %x htstbc %x chw %u\n", 2182 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2183 } 2184 2185 void 2186 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2187 { 2188 ieee80211_iterate_nodes(nt, 2189 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2190 } 2191 2192 static void 2193 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2194 { 2195 struct ieee80211vap *vap; 2196 2197 IEEE80211_LOCK_ASSERT(ic); 2198 2199 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2200 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2201 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2202 } 2203 2204 void 2205 ieee80211_notify_erp(struct ieee80211com *ic) 2206 { 2207 IEEE80211_LOCK(ic); 2208 ieee80211_notify_erp_locked(ic); 2209 IEEE80211_UNLOCK(ic); 2210 } 2211 2212 /* 2213 * Handle a station joining an 11g network. 2214 */ 2215 static void 2216 ieee80211_node_join_11g(struct ieee80211_node *ni) 2217 { 2218 struct ieee80211com *ic = ni->ni_ic; 2219 2220 IEEE80211_LOCK_ASSERT(ic); 2221 2222 /* 2223 * Station isn't capable of short slot time. Bump 2224 * the count of long slot time stations and disable 2225 * use of short slot time. Note that the actual switch 2226 * over to long slot time use may not occur until the 2227 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2228 */ 2229 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2230 ic->ic_longslotsta++; 2231 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2232 "station needs long slot time, count %d", 2233 ic->ic_longslotsta); 2234 /* XXX vap's w/ conflicting needs won't work */ 2235 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2236 /* 2237 * Don't force slot time when switched to turbo 2238 * mode as non-ERP stations won't be present; this 2239 * need only be done when on the normal G channel. 2240 */ 2241 ieee80211_set_shortslottime(ic, 0); 2242 } 2243 } 2244 /* 2245 * If the new station is not an ERP station 2246 * then bump the counter and enable protection 2247 * if configured. 2248 */ 2249 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2250 ic->ic_nonerpsta++; 2251 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2252 "station is !ERP, %d non-ERP stations associated", 2253 ic->ic_nonerpsta); 2254 /* 2255 * If station does not support short preamble 2256 * then we must enable use of Barker preamble. 2257 */ 2258 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2259 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2260 "%s", "station needs long preamble"); 2261 ic->ic_flags |= IEEE80211_F_USEBARKER; 2262 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2263 } 2264 /* 2265 * If protection is configured and this is the first 2266 * indication we should use protection, enable it. 2267 */ 2268 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2269 ic->ic_nonerpsta == 1 && 2270 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2271 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2272 "%s: enable use of protection\n", __func__); 2273 ic->ic_flags |= IEEE80211_F_USEPROT; 2274 ieee80211_notify_erp_locked(ic); 2275 } 2276 } else 2277 ni->ni_flags |= IEEE80211_NODE_ERP; 2278 } 2279 2280 void 2281 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2282 { 2283 struct ieee80211com *ic = ni->ni_ic; 2284 struct ieee80211vap *vap = ni->ni_vap; 2285 int newassoc; 2286 2287 if (ni->ni_associd == 0) { 2288 uint16_t aid; 2289 2290 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2291 /* 2292 * It would be good to search the bitmap 2293 * more efficiently, but this will do for now. 2294 */ 2295 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2296 if (!IEEE80211_AID_ISSET(vap, aid)) 2297 break; 2298 } 2299 if (aid >= vap->iv_max_aid) { 2300 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2301 ieee80211_node_leave(ni); 2302 return; 2303 } 2304 ni->ni_associd = aid | 0xc000; 2305 ni->ni_jointime = time_second; 2306 IEEE80211_LOCK(ic); 2307 IEEE80211_AID_SET(vap, ni->ni_associd); 2308 vap->iv_sta_assoc++; 2309 ic->ic_sta_assoc++; 2310 2311 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2312 ieee80211_ht_node_join(ni); 2313 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2314 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2315 ieee80211_node_join_11g(ni); 2316 IEEE80211_UNLOCK(ic); 2317 2318 newassoc = 1; 2319 } else 2320 newassoc = 0; 2321 2322 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2323 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2324 IEEE80211_NODE_AID(ni), 2325 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2326 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2327 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2328 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2329 ni->ni_flags & IEEE80211_NODE_HT ? 2330 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2331 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2332 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2333 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2334 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2335 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2336 ", fast-frames" : "", 2337 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2338 ", turbo" : "" 2339 ); 2340 2341 ieee80211_node_setuptxparms(ni); 2342 /* give driver a chance to setup state like ni_txrate */ 2343 if (ic->ic_newassoc != NULL) 2344 ic->ic_newassoc(ni, newassoc); 2345 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2346 /* tell the authenticator about new station */ 2347 if (vap->iv_auth->ia_node_join != NULL) 2348 vap->iv_auth->ia_node_join(ni); 2349 ieee80211_notify_node_join(ni, 2350 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2351 } 2352 2353 static void 2354 disable_protection(struct ieee80211com *ic) 2355 { 2356 KASSERT(ic->ic_nonerpsta == 0 && 2357 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2358 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2359 ic->ic_flags_ext)); 2360 2361 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2362 /* XXX verify mode? */ 2363 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2364 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2365 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2366 } 2367 ieee80211_notify_erp_locked(ic); 2368 } 2369 2370 /* 2371 * Handle a station leaving an 11g network. 2372 */ 2373 static void 2374 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2375 { 2376 struct ieee80211com *ic = ni->ni_ic; 2377 2378 IEEE80211_LOCK_ASSERT(ic); 2379 2380 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2381 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2382 ic->ic_bsschan->ic_flags)); 2383 2384 /* 2385 * If a long slot station do the slot time bookkeeping. 2386 */ 2387 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2388 KASSERT(ic->ic_longslotsta > 0, 2389 ("bogus long slot station count %d", ic->ic_longslotsta)); 2390 ic->ic_longslotsta--; 2391 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2392 "long slot time station leaves, count now %d", 2393 ic->ic_longslotsta); 2394 if (ic->ic_longslotsta == 0) { 2395 /* 2396 * Re-enable use of short slot time if supported 2397 * and not operating in IBSS mode (per spec). 2398 */ 2399 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2400 ic->ic_opmode != IEEE80211_M_IBSS) { 2401 IEEE80211_DPRINTF(ni->ni_vap, 2402 IEEE80211_MSG_ASSOC, 2403 "%s: re-enable use of short slot time\n", 2404 __func__); 2405 ieee80211_set_shortslottime(ic, 1); 2406 } 2407 } 2408 } 2409 /* 2410 * If a non-ERP station do the protection-related bookkeeping. 2411 */ 2412 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2413 KASSERT(ic->ic_nonerpsta > 0, 2414 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2415 ic->ic_nonerpsta--; 2416 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2417 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2418 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2419 " (non-ERP sta present)" : ""); 2420 if (ic->ic_nonerpsta == 0 && 2421 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2422 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2423 "%s: disable use of protection\n", __func__); 2424 disable_protection(ic); 2425 } 2426 } 2427 } 2428 2429 /* 2430 * Time out presence of an overlapping bss with non-ERP 2431 * stations. When operating in hostap mode we listen for 2432 * beacons from other stations and if we identify a non-ERP 2433 * station is present we enable protection. To identify 2434 * when all non-ERP stations are gone we time out this 2435 * condition. 2436 */ 2437 static void 2438 ieee80211_erp_timeout(struct ieee80211com *ic) 2439 { 2440 2441 IEEE80211_LOCK_ASSERT(ic); 2442 2443 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2444 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2445 #if 0 2446 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2447 "%s", "age out non-ERP sta present on channel"); 2448 #endif 2449 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2450 if (ic->ic_nonerpsta == 0) 2451 disable_protection(ic); 2452 } 2453 } 2454 2455 /* 2456 * Handle bookkeeping for station deauthentication/disassociation 2457 * when operating as an ap. 2458 */ 2459 void 2460 ieee80211_node_leave(struct ieee80211_node *ni) 2461 { 2462 struct ieee80211com *ic = ni->ni_ic; 2463 struct ieee80211vap *vap = ni->ni_vap; 2464 struct ieee80211_node_table *nt = ni->ni_table; 2465 2466 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2467 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2468 2469 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2470 ("unexpected operating mode %u", vap->iv_opmode)); 2471 /* 2472 * If node wasn't previously associated all 2473 * we need to do is reclaim the reference. 2474 */ 2475 /* XXX ibss mode bypasses 11g and notification */ 2476 if (ni->ni_associd == 0) 2477 goto done; 2478 /* 2479 * Tell the authenticator the station is leaving. 2480 * Note that we must do this before yanking the 2481 * association id as the authenticator uses the 2482 * associd to locate it's state block. 2483 */ 2484 if (vap->iv_auth->ia_node_leave != NULL) 2485 vap->iv_auth->ia_node_leave(ni); 2486 2487 IEEE80211_LOCK(ic); 2488 IEEE80211_AID_CLR(vap, ni->ni_associd); 2489 ni->ni_associd = 0; 2490 vap->iv_sta_assoc--; 2491 ic->ic_sta_assoc--; 2492 2493 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2494 ieee80211_ht_node_leave(ni); 2495 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2496 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2497 ieee80211_node_leave_11g(ni); 2498 IEEE80211_UNLOCK(ic); 2499 /* 2500 * Cleanup station state. In particular clear various 2501 * state that might otherwise be reused if the node 2502 * is reused before the reference count goes to zero 2503 * (and memory is reclaimed). 2504 */ 2505 ieee80211_sta_leave(ni); 2506 done: 2507 /* 2508 * Remove the node from any table it's recorded in and 2509 * drop the caller's reference. Removal from the table 2510 * is important to insure the node is not reprocessed 2511 * for inactivity. 2512 */ 2513 if (nt != NULL) { 2514 IEEE80211_NODE_LOCK(nt); 2515 node_reclaim(nt, ni); 2516 IEEE80211_NODE_UNLOCK(nt); 2517 } else 2518 ieee80211_free_node(ni); 2519 } 2520 2521 struct rssiinfo { 2522 struct ieee80211vap *vap; 2523 int rssi_samples; 2524 uint32_t rssi_total; 2525 }; 2526 2527 static void 2528 get_hostap_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 associated stations */ 2537 if (ni->ni_associd == 0) 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 2546 static void 2547 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2548 { 2549 struct rssiinfo *info = arg; 2550 struct ieee80211vap *vap = ni->ni_vap; 2551 int8_t rssi; 2552 2553 if (info->vap != vap) 2554 return; 2555 /* only neighbors */ 2556 /* XXX check bssid */ 2557 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2558 return; 2559 rssi = vap->iv_ic->ic_node_getrssi(ni); 2560 if (rssi != 0) { 2561 info->rssi_samples++; 2562 info->rssi_total += rssi; 2563 } 2564 } 2565 2566 #ifdef IEEE80211_SUPPORT_MESH 2567 static void 2568 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2569 { 2570 struct rssiinfo *info = arg; 2571 struct ieee80211vap *vap = ni->ni_vap; 2572 int8_t rssi; 2573 2574 if (info->vap != vap) 2575 return; 2576 /* only neighbors that peered successfully */ 2577 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2578 return; 2579 rssi = vap->iv_ic->ic_node_getrssi(ni); 2580 if (rssi != 0) { 2581 info->rssi_samples++; 2582 info->rssi_total += rssi; 2583 } 2584 } 2585 #endif /* IEEE80211_SUPPORT_MESH */ 2586 2587 int8_t 2588 ieee80211_getrssi(struct ieee80211vap *vap) 2589 { 2590 #define NZ(x) ((x) == 0 ? 1 : (x)) 2591 struct ieee80211com *ic = vap->iv_ic; 2592 struct rssiinfo info; 2593 2594 info.rssi_total = 0; 2595 info.rssi_samples = 0; 2596 info.vap = vap; 2597 switch (vap->iv_opmode) { 2598 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2599 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2600 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2601 break; 2602 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2603 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2604 break; 2605 #ifdef IEEE80211_SUPPORT_MESH 2606 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2607 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2608 break; 2609 #endif 2610 case IEEE80211_M_MONITOR: /* XXX */ 2611 case IEEE80211_M_STA: /* use stats from associated ap */ 2612 default: 2613 if (vap->iv_bss != NULL) 2614 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2615 info.rssi_samples = 1; 2616 break; 2617 } 2618 return info.rssi_total / NZ(info.rssi_samples); 2619 #undef NZ 2620 } 2621 2622 void 2623 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2624 { 2625 2626 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2627 return; 2628 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2629 /* for non-station mode return avg'd rssi accounting */ 2630 if (vap->iv_opmode != IEEE80211_M_STA) 2631 *rssi = ieee80211_getrssi(vap); 2632 } 2633