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 static void ieee80211_node_timeout_callout(void *arg); 94 95 static void _ieee80211_free_node(struct ieee80211_node *); 96 97 static void ieee80211_node_table_init(struct ieee80211com *ic, 98 struct ieee80211_node_table *nt, const char *name, 99 int inact, int keymaxix); 100 static void ieee80211_node_table_reset(struct ieee80211_node_table *, 101 struct ieee80211vap *); 102 static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 103 static void ieee80211_erp_timeout(struct ieee80211com *); 104 105 MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 106 MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 107 108 void 109 ieee80211_node_attach(struct ieee80211com *ic) 110 { 111 /* XXX really want maxlen enforced per-sta */ 112 ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, 113 "802.11 staging q"); 114 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 115 IEEE80211_INACT_INIT, ic->ic_max_keyix); 116 callout_init_mp(&ic->ic_inact); 117 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 118 ieee80211_node_timeout_callout, ic); 119 120 ic->ic_node_alloc = node_alloc; 121 ic->ic_node_free = node_free; 122 ic->ic_node_cleanup = node_cleanup; 123 ic->ic_node_age = node_age; 124 ic->ic_node_drain = node_age; /* NB: same as age */ 125 ic->ic_node_getrssi = node_getrssi; 126 ic->ic_node_getsignal = node_getsignal; 127 ic->ic_node_getmimoinfo = node_getmimoinfo; 128 129 /* 130 * Set flags to be propagated to all vap's; 131 * these define default behaviour/configuration. 132 */ 133 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 134 } 135 136 void 137 ieee80211_node_detach(struct ieee80211com *ic) 138 { 139 140 callout_stop(&ic->ic_inact); 141 ieee80211_node_table_cleanup(&ic->ic_sta); 142 ieee80211_ageq_cleanup(&ic->ic_stageq); 143 } 144 145 void 146 ieee80211_node_vattach(struct ieee80211vap *vap) 147 { 148 /* NB: driver can override */ 149 vap->iv_max_aid = IEEE80211_AID_DEF; 150 151 /* default station inactivity timer setings */ 152 vap->iv_inact_init = IEEE80211_INACT_INIT; 153 vap->iv_inact_auth = IEEE80211_INACT_AUTH; 154 vap->iv_inact_run = IEEE80211_INACT_RUN; 155 vap->iv_inact_probe = IEEE80211_INACT_PROBE; 156 157 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, 158 "%s: init %u auth %u run %u probe %u\n", __func__, 159 vap->iv_inact_init, vap->iv_inact_auth, 160 vap->iv_inact_run, vap->iv_inact_probe); 161 } 162 163 void 164 ieee80211_node_latevattach(struct ieee80211vap *vap) 165 { 166 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 167 /* XXX should we allow max aid to be zero? */ 168 if (vap->iv_max_aid < IEEE80211_AID_MIN) { 169 vap->iv_max_aid = IEEE80211_AID_MIN; 170 if_printf(vap->iv_ifp, 171 "WARNING: max aid too small, changed to %d\n", 172 vap->iv_max_aid); 173 } 174 vap->iv_aid_bitmap = (uint32_t *) kmalloc( 175 howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 176 M_80211_NODE, M_INTWAIT | M_ZERO); 177 if (vap->iv_aid_bitmap == NULL) { 178 /* XXX no way to recover */ 179 kprintf("%s: no memory for AID bitmap, max aid %d!\n", 180 __func__, vap->iv_max_aid); 181 vap->iv_max_aid = 0; 182 } 183 } 184 185 ieee80211_reset_bss(vap); 186 187 vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 188 } 189 190 void 191 ieee80211_node_vdetach(struct ieee80211vap *vap) 192 { 193 struct ieee80211com *ic = vap->iv_ic; 194 195 ieee80211_node_table_reset(&ic->ic_sta, vap); 196 if (vap->iv_bss != NULL) { 197 ieee80211_free_node(vap->iv_bss); 198 vap->iv_bss = NULL; 199 } 200 if (vap->iv_aid_bitmap != NULL) { 201 kfree(vap->iv_aid_bitmap, M_80211_NODE); 202 vap->iv_aid_bitmap = NULL; 203 } 204 } 205 206 /* 207 * Port authorize/unauthorize interfaces for use by an authenticator. 208 */ 209 210 void 211 ieee80211_node_authorize(struct ieee80211_node *ni) 212 { 213 struct ieee80211vap *vap = ni->ni_vap; 214 215 ni->ni_flags |= IEEE80211_NODE_AUTH; 216 ni->ni_inact_reload = vap->iv_inact_run; 217 ni->ni_inact = ni->ni_inact_reload; 218 219 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 220 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 221 } 222 223 void 224 ieee80211_node_unauthorize(struct ieee80211_node *ni) 225 { 226 struct ieee80211vap *vap = ni->ni_vap; 227 228 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 229 ni->ni_inact_reload = vap->iv_inact_auth; 230 if (ni->ni_inact > ni->ni_inact_reload) 231 ni->ni_inact = ni->ni_inact_reload; 232 233 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 234 "%s: inact_reload %u inact %u", __func__, 235 ni->ni_inact_reload, ni->ni_inact); 236 } 237 238 /* 239 * Fix tx parameters for a node according to ``association state''. 240 */ 241 void 242 ieee80211_node_setuptxparms(struct ieee80211_node *ni) 243 { 244 struct ieee80211vap *vap = ni->ni_vap; 245 enum ieee80211_phymode mode; 246 247 if (ni->ni_flags & IEEE80211_NODE_HT) { 248 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 249 mode = IEEE80211_MODE_11NA; 250 else 251 mode = IEEE80211_MODE_11NG; 252 } else { /* legacy rate handling */ 253 if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) 254 mode = IEEE80211_MODE_STURBO_A; 255 else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) 256 mode = IEEE80211_MODE_HALF; 257 else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) 258 mode = IEEE80211_MODE_QUARTER; 259 /* NB: 108A should be handled as 11a */ 260 else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 261 mode = IEEE80211_MODE_11A; 262 else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || 263 (ni->ni_flags & IEEE80211_NODE_ERP)) 264 mode = IEEE80211_MODE_11G; 265 else 266 mode = IEEE80211_MODE_11B; 267 } 268 ni->ni_txparms = &vap->iv_txparms[mode]; 269 } 270 271 /* 272 * Set/change the channel. The rate set is also updated as 273 * to insure a consistent view by drivers. 274 * XXX should be private but hostap needs it to deal with CSA 275 */ 276 void 277 ieee80211_node_set_chan(struct ieee80211_node *ni, 278 struct ieee80211_channel *chan) 279 { 280 struct ieee80211com *ic = ni->ni_ic; 281 struct ieee80211vap *vap = ni->ni_vap; 282 enum ieee80211_phymode mode; 283 284 KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 285 286 ni->ni_chan = chan; 287 mode = ieee80211_chan2mode(chan); 288 if (IEEE80211_IS_CHAN_HT(chan)) { 289 /* 290 * XXX Gotta be careful here; the rate set returned by 291 * ieee80211_get_suprates is actually any HT rate 292 * set so blindly copying it will be bad. We must 293 * install the legacy rate est in ni_rates and the 294 * HT rate set in ni_htrates. 295 */ 296 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 297 /* 298 * Setup bss tx parameters based on operating mode. We 299 * use legacy rates when operating in a mixed HT+non-HT bss 300 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 301 */ 302 if (mode == IEEE80211_MODE_11NA && 303 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 304 mode = IEEE80211_MODE_11A; 305 else if (mode == IEEE80211_MODE_11NG && 306 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 307 mode = IEEE80211_MODE_11G; 308 if (mode == IEEE80211_MODE_11G && 309 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 310 mode = IEEE80211_MODE_11B; 311 } 312 ni->ni_txparms = &vap->iv_txparms[mode]; 313 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 314 } 315 316 static __inline void 317 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 318 { 319 /* propagate useful state */ 320 nbss->ni_authmode = obss->ni_authmode; 321 nbss->ni_txpower = obss->ni_txpower; 322 nbss->ni_vlan = obss->ni_vlan; 323 /* XXX statistics? */ 324 /* XXX legacy WDS bssid? */ 325 } 326 327 void 328 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 329 { 330 struct ieee80211com *ic = vap->iv_ic; 331 struct ieee80211_node *ni; 332 333 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 334 "%s: creating %s on channel %u\n", __func__, 335 ieee80211_opmode_name[vap->iv_opmode], 336 ieee80211_chan2ieee(ic, chan)); 337 338 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 339 if (ni == NULL) { 340 /* XXX recovery? */ 341 return; 342 } 343 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 344 ni->ni_esslen = vap->iv_des_ssid[0].len; 345 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 346 if (vap->iv_bss != NULL) 347 copy_bss(ni, vap->iv_bss); 348 ni->ni_intval = ic->ic_bintval; 349 if (vap->iv_flags & IEEE80211_F_PRIVACY) 350 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 351 if (ic->ic_phytype == IEEE80211_T_FH) { 352 ni->ni_fhdwell = 200; /* XXX */ 353 ni->ni_fhindex = 1; 354 } 355 if (vap->iv_opmode == IEEE80211_M_IBSS) { 356 vap->iv_flags |= IEEE80211_F_SIBSS; 357 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 358 if (vap->iv_flags & IEEE80211_F_DESBSSID) 359 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 360 else { 361 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 362 /* clear group bit, add local bit */ 363 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 364 } 365 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 366 if (vap->iv_flags & IEEE80211_F_DESBSSID) 367 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 368 else 369 #ifdef IEEE80211_SUPPORT_TDMA 370 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 371 #endif 372 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 373 #ifdef IEEE80211_SUPPORT_MESH 374 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 375 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 376 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 377 #endif 378 } 379 /* 380 * Fix the channel and related attributes. 381 */ 382 /* clear DFS CAC state on previous channel */ 383 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 384 ic->ic_bsschan->ic_freq != chan->ic_freq && 385 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 386 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 387 ic->ic_bsschan = chan; 388 ieee80211_node_set_chan(ni, chan); 389 ic->ic_curmode = ieee80211_chan2mode(chan); 390 /* 391 * Do mode-specific setup. 392 */ 393 if (IEEE80211_IS_CHAN_FULL(chan)) { 394 if (IEEE80211_IS_CHAN_ANYG(chan)) { 395 /* 396 * Use a mixed 11b/11g basic rate set. 397 */ 398 ieee80211_setbasicrates(&ni->ni_rates, 399 IEEE80211_MODE_11G); 400 if (vap->iv_flags & IEEE80211_F_PUREG) { 401 /* 402 * Also mark OFDM rates basic so 11b 403 * stations do not join (WiFi compliance). 404 */ 405 ieee80211_addbasicrates(&ni->ni_rates, 406 IEEE80211_MODE_11A); 407 } 408 } else if (IEEE80211_IS_CHAN_B(chan)) { 409 /* 410 * Force pure 11b rate set. 411 */ 412 ieee80211_setbasicrates(&ni->ni_rates, 413 IEEE80211_MODE_11B); 414 } 415 } 416 417 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 418 } 419 420 /* 421 * Reset bss state on transition to the INIT state. 422 * Clear any stations from the table (they have been 423 * deauth'd) and reset the bss node (clears key, rate 424 * etc. state). 425 */ 426 void 427 ieee80211_reset_bss(struct ieee80211vap *vap) 428 { 429 struct ieee80211com *ic = vap->iv_ic; 430 struct ieee80211_node *ni, *obss; 431 432 ieee80211_node_table_reset(&ic->ic_sta, vap); 433 /* XXX multi-bss: wrong */ 434 ieee80211_reset_erp(ic); 435 436 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 437 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 438 obss = vap->iv_bss; 439 vap->iv_bss = ieee80211_ref_node(ni); 440 if (obss != NULL) { 441 copy_bss(ni, obss); 442 ni->ni_intval = ic->ic_bintval; 443 ieee80211_free_node(obss); 444 } else 445 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 446 } 447 448 static int 449 match_ssid(const struct ieee80211_node *ni, 450 int nssid, const struct ieee80211_scan_ssid ssids[]) 451 { 452 int i; 453 454 for (i = 0; i < nssid; i++) { 455 if (ni->ni_esslen == ssids[i].len && 456 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 457 return 1; 458 } 459 return 0; 460 } 461 462 /* 463 * Test a node for suitability/compatibility. 464 */ 465 static int 466 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 467 { 468 struct ieee80211com *ic = ni->ni_ic; 469 uint8_t rate; 470 471 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 472 return 0; 473 if (vap->iv_opmode == IEEE80211_M_IBSS) { 474 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 475 return 0; 476 } else { 477 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 478 return 0; 479 } 480 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 481 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 482 return 0; 483 } else { 484 /* XXX does this mean privacy is supported or required? */ 485 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 486 return 0; 487 } 488 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 489 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 490 if (rate & IEEE80211_RATE_BASIC) 491 return 0; 492 if (vap->iv_des_nssid != 0 && 493 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 494 return 0; 495 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 496 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 497 return 0; 498 return 1; 499 } 500 501 #ifdef IEEE80211_DEBUG 502 /* 503 * Display node suitability/compatibility. 504 */ 505 static void 506 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 507 { 508 struct ieee80211com *ic = ni->ni_ic; 509 uint8_t rate; 510 int fail; 511 512 fail = 0; 513 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 514 fail |= 0x01; 515 if (vap->iv_opmode == IEEE80211_M_IBSS) { 516 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 517 fail |= 0x02; 518 } else { 519 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 520 fail |= 0x02; 521 } 522 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 523 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 524 fail |= 0x04; 525 } else { 526 /* XXX does this mean privacy is supported or required? */ 527 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 528 fail |= 0x04; 529 } 530 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 531 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 532 if (rate & IEEE80211_RATE_BASIC) 533 fail |= 0x08; 534 if (vap->iv_des_nssid != 0 && 535 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 536 fail |= 0x10; 537 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 538 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 539 fail |= 0x20; 540 541 kprintf(" %c %6D", fail ? '-' : '+', ni->ni_macaddr, ":"); 542 kprintf(" %6D%c", ni->ni_bssid, ":", 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 #endif 579 580 if (ni == vap->iv_bss || 581 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 582 /* unchanged, nothing to do */ 583 return 0; 584 } 585 if (!check_bss(vap, ni)) { 586 /* capabilities mismatch */ 587 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 588 "%s: merge failed, capabilities mismatch\n", __func__); 589 #ifdef IEEE80211_DEBUG 590 if (ieee80211_msg_assoc(vap)) 591 check_bss_debug(vap, ni); 592 #endif 593 vap->iv_stats.is_ibss_capmismatch++; 594 return 0; 595 } 596 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 597 "%s: new bssid %6D: %s preamble, %s slot time%s\n", __func__, 598 ni->ni_bssid, ":", 599 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 600 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 601 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 602 ); 603 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 604 } 605 606 /* 607 * Calculate HT channel promotion flags for all vaps. 608 * This assumes ni_chan have been setup for each vap. 609 */ 610 static int 611 gethtadjustflags(struct ieee80211com *ic) 612 { 613 struct ieee80211vap *vap; 614 int flags; 615 616 flags = 0; 617 /* XXX locking */ 618 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 619 if (vap->iv_state < IEEE80211_S_RUN) 620 continue; 621 switch (vap->iv_opmode) { 622 case IEEE80211_M_WDS: 623 case IEEE80211_M_STA: 624 case IEEE80211_M_AHDEMO: 625 case IEEE80211_M_HOSTAP: 626 case IEEE80211_M_IBSS: 627 case IEEE80211_M_MBSS: 628 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 629 break; 630 default: 631 break; 632 } 633 } 634 return flags; 635 } 636 637 /* 638 * Check if the current channel needs to change based on whether 639 * any vap's are using HT20/HT40. This is used to sync the state 640 * of ic_curchan after a channel width change on a running vap. 641 */ 642 void 643 ieee80211_sync_curchan(struct ieee80211com *ic) 644 { 645 struct ieee80211_channel *c; 646 647 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 648 if (c != ic->ic_curchan) { 649 ic->ic_curchan = c; 650 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 651 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 652 ic->ic_set_channel(ic); 653 ieee80211_radiotap_chan_change(ic); 654 } 655 } 656 657 /* 658 * Setup the current channel. The request channel may be 659 * promoted if other vap's are operating with HT20/HT40. 660 */ 661 void 662 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 663 { 664 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 665 int flags = gethtadjustflags(ic); 666 /* 667 * Check for channel promotion required to support the 668 * set of running vap's. This assumes we are called 669 * after ni_chan is setup for each vap. 670 */ 671 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 672 if (flags > ieee80211_htchanflags(c)) 673 c = ieee80211_ht_adjust_channel(ic, c, flags); 674 } 675 ic->ic_bsschan = ic->ic_curchan = c; 676 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 677 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 678 } 679 680 /* 681 * Change the current channel. The channel change is guaranteed to have 682 * happened before the next state change. 683 */ 684 void 685 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 686 { 687 ieee80211_setupcurchan(ic, c); 688 ieee80211_runtask(ic, &ic->ic_chan_task); 689 } 690 691 /* 692 * Join the specified IBSS/BSS network. The node is assumed to 693 * be passed in with a held reference. 694 */ 695 static int 696 ieee80211_sta_join1(struct ieee80211_node *selbs) 697 { 698 struct ieee80211vap *vap = selbs->ni_vap; 699 struct ieee80211com *ic = selbs->ni_ic; 700 struct ieee80211_node *obss; 701 int canreassoc; 702 703 /* 704 * Committed to selbs, setup state. 705 */ 706 obss = vap->iv_bss; 707 /* 708 * Check if old+new node have the same address in which 709 * case we can reassociate when operating in sta mode. 710 */ 711 canreassoc = (obss != NULL && 712 vap->iv_state == IEEE80211_S_RUN && 713 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 714 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 715 if (obss != NULL) { 716 copy_bss(selbs, obss); 717 ieee80211_node_decref(obss); /* iv_bss reference */ 718 ieee80211_free_node(obss); /* station table reference */ 719 obss = NULL; /* NB: guard against later use */ 720 } 721 722 /* 723 * Delete unusable rates; we've already checked 724 * that the negotiated rate set is acceptable. 725 */ 726 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 727 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 728 729 ieee80211_setcurchan(ic, selbs->ni_chan); 730 /* 731 * Set the erp state (mostly the slot time) to deal with 732 * the auto-select case; this should be redundant if the 733 * mode is locked. 734 */ 735 ieee80211_reset_erp(ic); 736 ieee80211_wme_initparams(vap); 737 738 if (vap->iv_opmode == IEEE80211_M_STA) { 739 if (canreassoc) { 740 /* Reassociate */ 741 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 742 } else { 743 /* 744 * Act as if we received a DEAUTH frame in case we 745 * are invoked from the RUN state. This will cause 746 * us to try to re-authenticate if we are operating 747 * as a station. 748 */ 749 ieee80211_new_state(vap, IEEE80211_S_AUTH, 750 IEEE80211_FC0_SUBTYPE_DEAUTH); 751 } 752 } else 753 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 754 return 1; 755 } 756 757 int 758 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 759 const struct ieee80211_scan_entry *se) 760 { 761 struct ieee80211com *ic = vap->iv_ic; 762 struct ieee80211_node *ni; 763 764 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 765 if (ni == NULL) { 766 /* XXX msg */ 767 return 0; 768 } 769 /* 770 * Expand scan state into node's format. 771 * XXX may not need all this stuff 772 */ 773 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 774 ni->ni_esslen = se->se_ssid[1]; 775 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 776 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 777 ni->ni_intval = se->se_intval; 778 ni->ni_capinfo = se->se_capinfo; 779 ni->ni_chan = chan; 780 ni->ni_timoff = se->se_timoff; 781 ni->ni_fhdwell = se->se_fhdwell; 782 ni->ni_fhindex = se->se_fhindex; 783 ni->ni_erp = se->se_erp; 784 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 785 ni->ni_noise = se->se_noise; 786 if (vap->iv_opmode == IEEE80211_M_STA) { 787 /* NB: only infrastructure mode requires an associd */ 788 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 789 } 790 791 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 792 ieee80211_ies_expand(&ni->ni_ies); 793 #ifdef IEEE80211_SUPPORT_SUPERG 794 if (ni->ni_ies.ath_ie != NULL) 795 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 796 #endif 797 if (ni->ni_ies.htcap_ie != NULL) 798 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 799 if (ni->ni_ies.htinfo_ie != NULL) 800 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 801 #ifdef IEEE80211_SUPPORT_MESH 802 if (ni->ni_ies.meshid_ie != NULL) 803 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 804 #endif 805 #ifdef IEEE80211_SUPPORT_TDMA 806 if (ni->ni_ies.tdma_ie != NULL) 807 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 808 #endif 809 } 810 811 vap->iv_dtim_period = se->se_dtimperiod; 812 vap->iv_dtim_count = 0; 813 814 /* NB: must be after ni_chan is setup */ 815 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 816 IEEE80211_F_DOSORT); 817 if (ieee80211_iserp_rateset(&ni->ni_rates)) 818 ni->ni_flags |= IEEE80211_NODE_ERP; 819 ieee80211_node_setuptxparms(ni); 820 821 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 822 } 823 824 /* 825 * Leave the specified IBSS/BSS network. The node is assumed to 826 * be passed in with a held reference. 827 */ 828 void 829 ieee80211_sta_leave(struct ieee80211_node *ni) 830 { 831 struct ieee80211com *ic = ni->ni_ic; 832 833 ic->ic_node_cleanup(ni); 834 ieee80211_notify_node_leave(ni); 835 } 836 837 /* 838 * Send a deauthenticate frame and drop the station. 839 */ 840 void 841 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 842 { 843 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 844 ieee80211_ref_node(ni); 845 if (ni->ni_associd != 0) 846 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 847 ieee80211_node_leave(ni); 848 ieee80211_free_node(ni); 849 } 850 851 static struct ieee80211_node * 852 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 853 { 854 struct ieee80211_node *ni; 855 856 ni = (struct ieee80211_node *) kmalloc(sizeof(struct ieee80211_node), 857 M_80211_NODE, M_INTWAIT | M_ZERO); 858 return ni; 859 } 860 861 /* 862 * Initialize an ie blob with the specified data. If previous 863 * data exists re-use the data block. As a side effect we clear 864 * all references to specific ie's; the caller is required to 865 * recalculate them. 866 */ 867 int 868 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 869 { 870 /* NB: assumes data+len are the last fields */ 871 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 872 if (ies->data != NULL && ies->len != len) { 873 /* data size changed */ 874 kfree(ies->data, M_80211_NODE_IE); 875 ies->data = NULL; 876 } 877 if (ies->data == NULL) { 878 ies->data = (uint8_t *) kmalloc(len, M_80211_NODE_IE, M_INTWAIT); 879 if (ies->data == NULL) { 880 ies->len = 0; 881 /* NB: pointers have already been zero'd above */ 882 return 0; 883 } 884 } 885 memcpy(ies->data, data, len); 886 ies->len = len; 887 return 1; 888 } 889 890 /* 891 * Reclaim storage for an ie blob. 892 */ 893 void 894 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 895 { 896 if (ies->data != NULL) 897 kfree(ies->data, M_80211_NODE_IE); 898 } 899 900 /* 901 * Expand an ie blob data contents and to fillin individual 902 * ie pointers. The data blob is assumed to be well-formed; 903 * we don't do any validity checking of ie lengths. 904 */ 905 void 906 ieee80211_ies_expand(struct ieee80211_ies *ies) 907 { 908 uint8_t *ie; 909 int ielen; 910 911 ie = ies->data; 912 ielen = ies->len; 913 while (ielen > 0) { 914 switch (ie[0]) { 915 case IEEE80211_ELEMID_VENDOR: 916 if (iswpaoui(ie)) 917 ies->wpa_ie = ie; 918 else if (iswmeoui(ie)) 919 ies->wme_ie = ie; 920 #ifdef IEEE80211_SUPPORT_SUPERG 921 else if (isatherosoui(ie)) 922 ies->ath_ie = ie; 923 #endif 924 #ifdef IEEE80211_SUPPORT_TDMA 925 else if (istdmaoui(ie)) 926 ies->tdma_ie = ie; 927 #endif 928 break; 929 case IEEE80211_ELEMID_RSN: 930 ies->rsn_ie = ie; 931 break; 932 case IEEE80211_ELEMID_HTCAP: 933 ies->htcap_ie = ie; 934 break; 935 #ifdef IEEE80211_SUPPORT_MESH 936 case IEEE80211_ELEMID_MESHID: 937 ies->meshid_ie = ie; 938 break; 939 #endif 940 } 941 ielen -= 2 + ie[1]; 942 ie += 2 + ie[1]; 943 } 944 } 945 946 /* 947 * Reclaim any resources in a node and reset any critical 948 * state. Typically nodes are free'd immediately after, 949 * but in some cases the storage may be reused so we need 950 * to insure consistent state (should probably fix that). 951 */ 952 static void 953 node_cleanup(struct ieee80211_node *ni) 954 { 955 struct ieee80211vap *vap = ni->ni_vap; 956 struct ieee80211com *ic = ni->ni_ic; 957 int i; 958 959 /* NB: preserve ni_table */ 960 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 961 if (vap->iv_opmode != IEEE80211_M_STA) 962 vap->iv_ps_sta--; 963 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 964 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 965 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 966 } 967 /* 968 * Cleanup any HT-related state. 969 */ 970 if (ni->ni_flags & IEEE80211_NODE_HT) 971 ieee80211_ht_node_cleanup(ni); 972 #ifdef IEEE80211_SUPPORT_SUPERG 973 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 974 ieee80211_ff_node_cleanup(ni); 975 #endif 976 #ifdef IEEE80211_SUPPORT_MESH 977 /* 978 * Cleanup any mesh-related state. 979 */ 980 if (vap->iv_opmode == IEEE80211_M_MBSS) 981 ieee80211_mesh_node_cleanup(ni); 982 #endif 983 /* 984 * Clear any staging queue entries. 985 */ 986 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 987 988 /* 989 * Clear AREF flag that marks the authorization refcnt bump 990 * has happened. This is probably not needed as the node 991 * should always be removed from the table so not found but 992 * do it just in case. 993 * Likewise clear the ASSOCID flag as these flags are intended 994 * to be managed in tandem. 995 */ 996 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 997 998 /* 999 * Drain power save queue and, if needed, clear TIM. 1000 */ 1001 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1002 vap->iv_set_tim(ni, 0); 1003 1004 ni->ni_associd = 0; 1005 if (ni->ni_challenge != NULL) { 1006 kfree(ni->ni_challenge, M_80211_NODE); 1007 ni->ni_challenge = NULL; 1008 } 1009 /* 1010 * Preserve SSID, WPA, and WME ie's so the bss node is 1011 * reusable during a re-auth/re-assoc state transition. 1012 * If we remove these data they will not be recreated 1013 * because they come from a probe-response or beacon frame 1014 * which cannot be expected prior to the association-response. 1015 * This should not be an issue when operating in other modes 1016 * as stations leaving always go through a full state transition 1017 * which will rebuild this state. 1018 * 1019 * XXX does this leave us open to inheriting old state? 1020 */ 1021 for (i = 0; i < NELEM(ni->ni_rxfrag); i++) 1022 if (ni->ni_rxfrag[i] != NULL) { 1023 m_freem(ni->ni_rxfrag[i]); 1024 ni->ni_rxfrag[i] = NULL; 1025 } 1026 /* 1027 * Must be careful here to remove any key map entry w/o a LOR. 1028 */ 1029 ieee80211_node_delucastkey(ni); 1030 } 1031 1032 static void 1033 node_free(struct ieee80211_node *ni) 1034 { 1035 struct ieee80211com *ic = ni->ni_ic; 1036 1037 ieee80211_ratectl_node_deinit(ni); 1038 ic->ic_node_cleanup(ni); 1039 ieee80211_ies_cleanup(&ni->ni_ies); 1040 ieee80211_psq_cleanup(&ni->ni_psq); 1041 kfree(ni, M_80211_NODE); 1042 } 1043 1044 static void 1045 node_age(struct ieee80211_node *ni) 1046 { 1047 struct ieee80211vap *vap = ni->ni_vap; 1048 1049 /* 1050 * Age frames on the power save queue. 1051 */ 1052 if (ieee80211_node_psq_age(ni) != 0 && 1053 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1054 vap->iv_set_tim(ni, 0); 1055 /* 1056 * Age out HT resources (e.g. frames on the 1057 * A-MPDU reorder queues). 1058 */ 1059 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1060 ieee80211_ht_node_age(ni); 1061 } 1062 1063 static int8_t 1064 node_getrssi(const struct ieee80211_node *ni) 1065 { 1066 uint32_t avgrssi = ni->ni_avgrssi; 1067 int32_t rssi; 1068 1069 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1070 return 0; 1071 rssi = IEEE80211_RSSI_GET(avgrssi); 1072 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1073 } 1074 1075 static void 1076 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1077 { 1078 *rssi = node_getrssi(ni); 1079 *noise = ni->ni_noise; 1080 } 1081 1082 static void 1083 node_getmimoinfo(const struct ieee80211_node *ni, 1084 struct ieee80211_mimo_info *info) 1085 { 1086 /* XXX zero data? */ 1087 } 1088 1089 struct ieee80211_node * 1090 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1091 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1092 { 1093 struct ieee80211com *ic = nt->nt_ic; 1094 struct ieee80211_node *ni; 1095 int hash; 1096 1097 ni = ic->ic_node_alloc(vap, macaddr); 1098 if (ni == NULL) { 1099 vap->iv_stats.is_rx_nodealloc++; 1100 return NULL; 1101 } 1102 1103 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1104 "%s %p<%6D> in %s table\n", __func__, ni, 1105 macaddr, ":", nt->nt_name); 1106 1107 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1108 hash = IEEE80211_NODE_HASH(ic, macaddr); 1109 ieee80211_node_initref(ni); /* mark referenced */ 1110 ni->ni_chan = IEEE80211_CHAN_ANYC; 1111 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1112 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1113 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1114 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1115 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1116 ni->ni_inact_reload = nt->nt_inact_init; 1117 ni->ni_inact = ni->ni_inact_reload; 1118 ni->ni_ath_defkeyix = 0x7fff; 1119 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1120 #ifdef IEEE80211_SUPPORT_MESH 1121 if (vap->iv_opmode == IEEE80211_M_MBSS) 1122 ieee80211_mesh_node_init(vap, ni); 1123 #endif 1124 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1125 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1126 ni->ni_table = nt; 1127 ni->ni_vap = vap; 1128 ni->ni_ic = ic; 1129 1130 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1131 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1132 1133 return ni; 1134 } 1135 1136 /* 1137 * Craft a temporary node suitable for sending a management frame 1138 * to the specified station. We craft only as much state as we 1139 * need to do the work since the node will be immediately reclaimed 1140 * once the send completes. 1141 */ 1142 struct ieee80211_node * 1143 ieee80211_tmp_node(struct ieee80211vap *vap, 1144 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1145 { 1146 struct ieee80211com *ic = vap->iv_ic; 1147 struct ieee80211_node *ni; 1148 1149 ni = ic->ic_node_alloc(vap, macaddr); 1150 if (ni != NULL) { 1151 struct ieee80211_node *bss = vap->iv_bss; 1152 1153 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1154 "%s %p<%6D>\n", __func__, ni, macaddr, ":"); 1155 1156 ni->ni_table = NULL; /* NB: pedantic */ 1157 ni->ni_ic = ic; /* NB: needed to set channel */ 1158 ni->ni_vap = vap; 1159 1160 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1161 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1162 ieee80211_node_initref(ni); /* mark referenced */ 1163 /* NB: required by ieee80211_fix_rate */ 1164 ieee80211_node_set_chan(ni, bss->ni_chan); 1165 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1166 IEEE80211_KEYIX_NONE); 1167 ni->ni_txpower = bss->ni_txpower; 1168 /* XXX optimize away */ 1169 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1170 } else { 1171 /* XXX msg */ 1172 vap->iv_stats.is_rx_nodealloc++; 1173 } 1174 return ni; 1175 } 1176 1177 struct ieee80211_node * 1178 ieee80211_dup_bss(struct ieee80211vap *vap, 1179 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1180 { 1181 struct ieee80211com *ic = vap->iv_ic; 1182 struct ieee80211_node *ni; 1183 1184 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1185 if (ni != NULL) { 1186 struct ieee80211_node *bss = vap->iv_bss; 1187 /* 1188 * Inherit from iv_bss. 1189 */ 1190 copy_bss(ni, bss); 1191 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1192 ieee80211_node_set_chan(ni, bss->ni_chan); 1193 } 1194 return ni; 1195 } 1196 1197 /* 1198 * Create a bss node for a legacy WDS vap. The far end does 1199 * not associate so we just create create a new node and 1200 * simulate an association. The caller is responsible for 1201 * installing the node as the bss node and handling any further 1202 * setup work like authorizing the port. 1203 */ 1204 struct ieee80211_node * 1205 ieee80211_node_create_wds(struct ieee80211vap *vap, 1206 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1207 { 1208 struct ieee80211com *ic = vap->iv_ic; 1209 struct ieee80211_node *ni; 1210 1211 /* XXX check if node already in sta table? */ 1212 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1213 if (ni != NULL) { 1214 ni->ni_wdsvap = vap; 1215 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1216 /* 1217 * Inherit any manually configured settings. 1218 */ 1219 copy_bss(ni, vap->iv_bss); 1220 ieee80211_node_set_chan(ni, chan); 1221 /* NB: propagate ssid so available to WPA supplicant */ 1222 ni->ni_esslen = vap->iv_des_ssid[0].len; 1223 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1224 /* NB: no associd for peer */ 1225 /* 1226 * There are no management frames to use to 1227 * discover neighbor capabilities, so blindly 1228 * propagate the local configuration. 1229 */ 1230 if (vap->iv_flags & IEEE80211_F_WME) 1231 ni->ni_flags |= IEEE80211_NODE_QOS; 1232 #ifdef IEEE80211_SUPPORT_SUPERG 1233 if (vap->iv_flags & IEEE80211_F_FF) 1234 ni->ni_flags |= IEEE80211_NODE_FF; 1235 #endif 1236 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1237 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1238 /* 1239 * Device is HT-capable and HT is enabled for 1240 * the vap; setup HT operation. On return 1241 * ni_chan will be adjusted to an HT channel. 1242 */ 1243 ieee80211_ht_wds_init(ni); 1244 } else { 1245 struct ieee80211_channel *c = ni->ni_chan; 1246 /* 1247 * Force a legacy channel to be used. 1248 */ 1249 c = ieee80211_find_channel(ic, 1250 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1251 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1252 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1253 ni->ni_chan = c; 1254 } 1255 } 1256 return ni; 1257 } 1258 1259 struct ieee80211_node * 1260 #ifdef IEEE80211_DEBUG_REFCNT 1261 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1262 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1263 #else 1264 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1265 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1266 #endif 1267 { 1268 struct ieee80211_node *ni; 1269 int hash; 1270 1271 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1272 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1273 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1274 ieee80211_ref_node(ni); /* mark referenced */ 1275 #ifdef IEEE80211_DEBUG_REFCNT 1276 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1277 "%s (%s:%u) %p<%6D> refcnt %d\n", __func__, 1278 func, line, 1279 ni, ni->ni_macaddr, ":", 1280 ieee80211_node_refcnt(ni)); 1281 #endif 1282 return ni; 1283 } 1284 } 1285 return NULL; 1286 } 1287 1288 struct ieee80211_node * 1289 #ifdef IEEE80211_DEBUG_REFCNT 1290 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1291 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1292 #else 1293 ieee80211_find_node(struct ieee80211_node_table *nt, 1294 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1295 #endif 1296 { 1297 struct ieee80211_node *ni; 1298 1299 ni = ieee80211_find_node_locked(nt, macaddr); 1300 return ni; 1301 } 1302 1303 struct ieee80211_node * 1304 #ifdef IEEE80211_DEBUG_REFCNT 1305 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1306 const struct ieee80211vap *vap, 1307 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1308 #else 1309 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1310 const struct ieee80211vap *vap, 1311 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1312 #endif 1313 { 1314 struct ieee80211_node *ni; 1315 int hash; 1316 1317 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1318 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1319 if (ni->ni_vap == vap && 1320 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1321 ieee80211_ref_node(ni); /* mark referenced */ 1322 #ifdef IEEE80211_DEBUG_REFCNT 1323 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1324 "%s (%s:%u) %p<%6D> refcnt %d\n", __func__, 1325 func, line, 1326 ni, ni->ni_macaddr, ":", 1327 ieee80211_node_refcnt(ni)); 1328 #endif 1329 return ni; 1330 } 1331 } 1332 return NULL; 1333 } 1334 1335 struct ieee80211_node * 1336 #ifdef IEEE80211_DEBUG_REFCNT 1337 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1338 const struct ieee80211vap *vap, 1339 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1340 #else 1341 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1342 const struct ieee80211vap *vap, 1343 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1344 #endif 1345 { 1346 struct ieee80211_node *ni; 1347 1348 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1349 return ni; 1350 } 1351 1352 /* 1353 * Fake up a node; this handles node discovery in adhoc mode. 1354 * Note that for the driver's benefit we we treat this like 1355 * an association so the driver has an opportunity to setup 1356 * it's private state. 1357 */ 1358 struct ieee80211_node * 1359 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1360 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1361 { 1362 struct ieee80211_node *ni; 1363 1364 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1365 "%s: mac<%6D>\n", __func__, macaddr, ":"); 1366 ni = ieee80211_dup_bss(vap, macaddr); 1367 if (ni != NULL) { 1368 struct ieee80211com *ic = vap->iv_ic; 1369 1370 /* XXX no rate negotiation; just dup */ 1371 ni->ni_rates = vap->iv_bss->ni_rates; 1372 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1373 ni->ni_flags |= IEEE80211_NODE_ERP; 1374 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1375 /* 1376 * In adhoc demo mode there are no management 1377 * frames to use to discover neighbor capabilities, 1378 * so blindly propagate the local configuration 1379 * so we can do interesting things (e.g. use 1380 * WME to disable ACK's). 1381 */ 1382 if (vap->iv_flags & IEEE80211_F_WME) 1383 ni->ni_flags |= IEEE80211_NODE_QOS; 1384 #ifdef IEEE80211_SUPPORT_SUPERG 1385 if (vap->iv_flags & IEEE80211_F_FF) 1386 ni->ni_flags |= IEEE80211_NODE_FF; 1387 #endif 1388 } 1389 ieee80211_node_setuptxparms(ni); 1390 if (ic->ic_newassoc != NULL) 1391 ic->ic_newassoc(ni, 1); 1392 /* XXX not right for 802.1x/WPA */ 1393 ieee80211_node_authorize(ni); 1394 } 1395 return ni; 1396 } 1397 1398 void 1399 ieee80211_init_neighbor(struct ieee80211_node *ni, 1400 const struct ieee80211_frame *wh, 1401 const struct ieee80211_scanparams *sp) 1402 { 1403 ni->ni_esslen = sp->ssid[1]; 1404 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1405 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1406 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1407 ni->ni_intval = sp->bintval; 1408 ni->ni_capinfo = sp->capinfo; 1409 ni->ni_chan = ni->ni_ic->ic_curchan; 1410 ni->ni_fhdwell = sp->fhdwell; 1411 ni->ni_fhindex = sp->fhindex; 1412 ni->ni_erp = sp->erp; 1413 ni->ni_timoff = sp->timoff; 1414 #ifdef IEEE80211_SUPPORT_MESH 1415 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1416 ieee80211_mesh_init_neighbor(ni, wh, sp); 1417 #endif 1418 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1419 ieee80211_ies_expand(&ni->ni_ies); 1420 if (ni->ni_ies.wme_ie != NULL) 1421 ni->ni_flags |= IEEE80211_NODE_QOS; 1422 else 1423 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1424 #ifdef IEEE80211_SUPPORT_SUPERG 1425 if (ni->ni_ies.ath_ie != NULL) 1426 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1427 #endif 1428 } 1429 1430 /* NB: must be after ni_chan is setup */ 1431 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1432 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1433 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1434 } 1435 1436 /* 1437 * Do node discovery in adhoc mode on receipt of a beacon 1438 * or probe response frame. Note that for the driver's 1439 * benefit we we treat this like an association so the 1440 * driver has an opportunity to setup it's private state. 1441 */ 1442 struct ieee80211_node * 1443 ieee80211_add_neighbor(struct ieee80211vap *vap, 1444 const struct ieee80211_frame *wh, 1445 const struct ieee80211_scanparams *sp) 1446 { 1447 struct ieee80211_node *ni; 1448 1449 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1450 "%s: mac<%6D>\n", __func__, wh->i_addr2, ":"); 1451 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1452 if (ni != NULL) { 1453 struct ieee80211com *ic = vap->iv_ic; 1454 1455 ieee80211_init_neighbor(ni, wh, sp); 1456 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1457 ni->ni_flags |= IEEE80211_NODE_ERP; 1458 ieee80211_node_setuptxparms(ni); 1459 if (ic->ic_newassoc != NULL) 1460 ic->ic_newassoc(ni, 1); 1461 /* XXX not right for 802.1x/WPA */ 1462 ieee80211_node_authorize(ni); 1463 } 1464 return ni; 1465 } 1466 1467 #define IS_PROBEREQ(wh) \ 1468 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1469 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1470 #define IS_BCAST_PROBEREQ(wh) \ 1471 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1472 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1473 1474 static __inline struct ieee80211_node * 1475 _find_rxnode(struct ieee80211_node_table *nt, 1476 const struct ieee80211_frame_min *wh) 1477 { 1478 if (IS_BCAST_PROBEREQ(wh)) 1479 return NULL; /* spam bcast probe req to all vap's */ 1480 return ieee80211_find_node_locked(nt, wh->i_addr2); 1481 } 1482 1483 /* 1484 * Locate the node for sender, track state, and then pass the 1485 * (referenced) node up to the 802.11 layer for its use. Note 1486 * we can return NULL if the sender is not in the table. 1487 */ 1488 struct ieee80211_node * 1489 #ifdef IEEE80211_DEBUG_REFCNT 1490 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1491 const struct ieee80211_frame_min *wh, const char *func, int line) 1492 #else 1493 ieee80211_find_rxnode(struct ieee80211com *ic, 1494 const struct ieee80211_frame_min *wh) 1495 #endif 1496 { 1497 struct ieee80211_node_table *nt; 1498 struct ieee80211_node *ni; 1499 1500 nt = &ic->ic_sta; 1501 ni = _find_rxnode(nt, wh); 1502 1503 return ni; 1504 } 1505 1506 /* 1507 * Like ieee80211_find_rxnode but use the supplied h/w 1508 * key index as a hint to locate the node in the key 1509 * mapping table. If an entry is present at the key 1510 * index we return it; otherwise do a normal lookup and 1511 * update the mapping table if the station has a unicast 1512 * key assigned to it. 1513 */ 1514 struct ieee80211_node * 1515 #ifdef IEEE80211_DEBUG_REFCNT 1516 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1517 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1518 const char *func, int line) 1519 #else 1520 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1521 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1522 #endif 1523 { 1524 struct ieee80211_node_table *nt; 1525 struct ieee80211_node *ni; 1526 1527 nt = &ic->ic_sta; 1528 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1529 ni = nt->nt_keyixmap[keyix]; 1530 else 1531 ni = NULL; 1532 if (ni == NULL) { 1533 ni = _find_rxnode(nt, wh); 1534 if (ni != NULL && nt->nt_keyixmap != NULL) { 1535 /* 1536 * If the station has a unicast key cache slot 1537 * assigned update the key->node mapping table. 1538 */ 1539 keyix = ni->ni_ucastkey.wk_rxkeyix; 1540 /* XXX can keyixmap[keyix] != NULL? */ 1541 if (keyix < nt->nt_keyixmax && 1542 nt->nt_keyixmap[keyix] == NULL) { 1543 IEEE80211_DPRINTF(ni->ni_vap, 1544 IEEE80211_MSG_NODE, 1545 "%s: add key map entry %p<%6D> refcnt %d\n", 1546 __func__, ni, ni->ni_macaddr, ":", 1547 ieee80211_node_refcnt(ni)+1); 1548 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1549 } 1550 } 1551 } else { 1552 if (IS_BCAST_PROBEREQ(wh)) 1553 ni = NULL; /* spam bcast probe req to all vap's */ 1554 else 1555 ieee80211_ref_node(ni); 1556 } 1557 return ni; 1558 } 1559 #undef IS_BCAST_PROBEREQ 1560 #undef IS_PROBEREQ 1561 1562 /* 1563 * Return a reference to the appropriate node for sending 1564 * a data frame. This handles node discovery in adhoc networks. 1565 */ 1566 struct ieee80211_node * 1567 #ifdef IEEE80211_DEBUG_REFCNT 1568 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1569 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1570 const char *func, int line) 1571 #else 1572 ieee80211_find_txnode(struct ieee80211vap *vap, 1573 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1574 #endif 1575 { 1576 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1577 struct ieee80211_node *ni; 1578 1579 /* 1580 * The destination address should be in the node table 1581 * unless this is a multicast/broadcast frame. We can 1582 * also optimize station mode operation, all frames go 1583 * to the bss node. 1584 */ 1585 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1586 if (vap->iv_opmode == IEEE80211_M_STA || 1587 vap->iv_opmode == IEEE80211_M_WDS || 1588 IEEE80211_IS_MULTICAST(macaddr)) 1589 ni = ieee80211_ref_node(vap->iv_bss); 1590 else 1591 ni = ieee80211_find_node_locked(nt, macaddr); 1592 1593 if (ni == NULL) { 1594 if (vap->iv_opmode == IEEE80211_M_IBSS || 1595 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1596 /* 1597 * In adhoc mode cons up a node for the destination. 1598 * Note that we need an additional reference for the 1599 * caller to be consistent with 1600 * ieee80211_find_node_locked. 1601 */ 1602 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1603 if (ni != NULL) 1604 (void) ieee80211_ref_node(ni); 1605 } else { 1606 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1607 "no node, discard frame (%s)", __func__); 1608 vap->iv_stats.is_tx_nonode++; 1609 } 1610 } 1611 return ni; 1612 } 1613 1614 static void 1615 _ieee80211_free_node(struct ieee80211_node *ni) 1616 { 1617 struct ieee80211_node_table *nt = ni->ni_table; 1618 1619 /* 1620 * NB: careful about referencing the vap as it may be 1621 * gone if the last reference was held by a driver. 1622 * We know the com will always be present so it's safe 1623 * to use ni_ic below to reclaim resources. 1624 */ 1625 #if 0 1626 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1627 "%s %p<%6D> in %s table\n", __func__, ni, 1628 ni->ni_macaddr, ":", 1629 nt != NULL ? nt->nt_name : "<gone>"); 1630 #endif 1631 if (ni->ni_associd != 0) { 1632 struct ieee80211vap *vap = ni->ni_vap; 1633 if (vap->iv_aid_bitmap != NULL) 1634 IEEE80211_AID_CLR(vap, ni->ni_associd); 1635 } 1636 if (nt != NULL) { 1637 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1638 LIST_REMOVE(ni, ni_hash); 1639 } 1640 ni->ni_ic->ic_node_free(ni); 1641 } 1642 1643 void 1644 #ifdef IEEE80211_DEBUG_REFCNT 1645 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1646 #else 1647 ieee80211_free_node(struct ieee80211_node *ni) 1648 #endif 1649 { 1650 struct ieee80211_node_table *nt = ni->ni_table; 1651 1652 #ifdef IEEE80211_DEBUG_REFCNT 1653 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1654 "%s (%s:%u) %p<%6D> refcnt %d\n", __func__, func, line, ni, 1655 ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)-1); 1656 #endif 1657 if (nt != NULL) { 1658 if (ieee80211_node_dectestref(ni)) { 1659 /* 1660 * Last reference, reclaim state. 1661 */ 1662 _ieee80211_free_node(ni); 1663 } else if (ieee80211_node_refcnt(ni) == 1 && 1664 nt->nt_keyixmap != NULL) { 1665 ieee80211_keyix keyix; 1666 /* 1667 * Check for a last reference in the key mapping table. 1668 */ 1669 keyix = ni->ni_ucastkey.wk_rxkeyix; 1670 if (keyix < nt->nt_keyixmax && 1671 nt->nt_keyixmap[keyix] == ni) { 1672 IEEE80211_DPRINTF(ni->ni_vap, 1673 IEEE80211_MSG_NODE, 1674 "%s: %p<%6D> clear key map entry", __func__, 1675 ni, ni->ni_macaddr, ":"); 1676 nt->nt_keyixmap[keyix] = NULL; 1677 ieee80211_node_decref(ni); /* XXX needed? */ 1678 _ieee80211_free_node(ni); 1679 } 1680 } 1681 } else { 1682 if (ieee80211_node_dectestref(ni)) 1683 _ieee80211_free_node(ni); 1684 } 1685 } 1686 1687 /* 1688 * Reclaim a unicast key and clear any key cache state. 1689 */ 1690 int 1691 ieee80211_node_delucastkey(struct ieee80211_node *ni) 1692 { 1693 struct ieee80211com *ic = ni->ni_ic; 1694 struct ieee80211_node_table *nt = &ic->ic_sta; 1695 struct ieee80211_node *nikey; 1696 ieee80211_keyix keyix; 1697 int status; 1698 1699 /* 1700 * NB: We must beware of LOR here; deleting the key 1701 * can cause the crypto layer to block traffic updates 1702 * which can generate a LOR against the node table lock; 1703 * grab it here and stash the key index for our use below. 1704 * 1705 * Must also beware of recursion on the node table lock. 1706 * When called from node_cleanup we may already have 1707 * the node table lock held. Unfortunately there's no 1708 * way to separate out this path so we must do this 1709 * conditionally. 1710 */ 1711 nikey = NULL; 1712 status = 1; /* NB: success */ 1713 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1714 keyix = ni->ni_ucastkey.wk_rxkeyix; 1715 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1716 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1717 nikey = nt->nt_keyixmap[keyix]; 1718 nt->nt_keyixmap[keyix] = NULL; 1719 } 1720 } 1721 1722 if (nikey != NULL) { 1723 KASSERT(nikey == ni, 1724 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1725 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1726 "%s: delete key map entry %p<%6D> refcnt %d\n", 1727 __func__, ni, ni->ni_macaddr, ":", 1728 ieee80211_node_refcnt(ni)-1); 1729 ieee80211_free_node(ni); 1730 } 1731 return status; 1732 } 1733 1734 /* 1735 * Reclaim a node. If this is the last reference count then 1736 * do the normal free work. Otherwise remove it from the node 1737 * table and mark it gone by clearing the back-reference. 1738 */ 1739 static void 1740 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1741 { 1742 ieee80211_keyix keyix; 1743 1744 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1745 "%s: remove %p<%6D> from %s table, refcnt %d\n", 1746 __func__, ni, ni->ni_macaddr, ":", 1747 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1748 /* 1749 * Clear any entry in the unicast key mapping table. 1750 * We need to do it here so rx lookups don't find it 1751 * in the mapping table even if it's not in the hash 1752 * table. We cannot depend on the mapping table entry 1753 * being cleared because the node may not be free'd. 1754 */ 1755 keyix = ni->ni_ucastkey.wk_rxkeyix; 1756 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1757 nt->nt_keyixmap[keyix] == ni) { 1758 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1759 "%s: %p<%6D> clear key map entry %u\n", 1760 __func__, ni, ni->ni_macaddr, ":", keyix); 1761 nt->nt_keyixmap[keyix] = NULL; 1762 ieee80211_node_decref(ni); /* NB: don't need free */ 1763 } 1764 if (!ieee80211_node_dectestref(ni)) { 1765 /* 1766 * Other references are present, just remove the 1767 * node from the table so it cannot be found. When 1768 * the references are dropped storage will be 1769 * reclaimed. 1770 */ 1771 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1772 LIST_REMOVE(ni, ni_hash); 1773 ni->ni_table = NULL; /* clear reference */ 1774 } else 1775 _ieee80211_free_node(ni); 1776 } 1777 1778 /* 1779 * Node table support. 1780 */ 1781 1782 static void 1783 ieee80211_node_table_init(struct ieee80211com *ic, 1784 struct ieee80211_node_table *nt, 1785 const char *name, int inact, int keyixmax) 1786 { 1787 nt->nt_ic = ic; 1788 TAILQ_INIT(&nt->nt_node); 1789 nt->nt_name = name; 1790 nt->nt_scangen = 1; 1791 nt->nt_inact_init = inact; 1792 nt->nt_keyixmax = keyixmax; 1793 if (nt->nt_keyixmax > 0) { 1794 nt->nt_keyixmap = (struct ieee80211_node **) kmalloc( 1795 keyixmax * sizeof(struct ieee80211_node *), 1796 M_80211_NODE, M_INTWAIT | M_ZERO); 1797 if (nt->nt_keyixmap == NULL) 1798 if_printf(ic->ic_ifp, 1799 "Cannot allocate key index map with %u entries\n", 1800 keyixmax); 1801 } else 1802 nt->nt_keyixmap = NULL; 1803 } 1804 1805 static void 1806 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1807 struct ieee80211vap *match) 1808 { 1809 struct ieee80211_node *ni, *next; 1810 1811 TAILQ_FOREACH_MUTABLE(ni, &nt->nt_node, ni_list, next) { 1812 if (match != NULL && ni->ni_vap != match) 1813 continue; 1814 /* XXX can this happen? if so need's work */ 1815 if (ni->ni_associd != 0) { 1816 struct ieee80211vap *vap = ni->ni_vap; 1817 1818 if (vap->iv_auth->ia_node_leave != NULL) 1819 vap->iv_auth->ia_node_leave(ni); 1820 if (vap->iv_aid_bitmap != NULL) 1821 IEEE80211_AID_CLR(vap, ni->ni_associd); 1822 } 1823 ni->ni_wdsvap = NULL; /* clear reference */ 1824 node_reclaim(nt, ni); 1825 } 1826 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1827 /* 1828 * Make a separate pass to clear references to this vap 1829 * held by DWDS entries. They will not be matched above 1830 * because ni_vap will point to the ap vap but we still 1831 * need to clear ni_wdsvap when the WDS vap is destroyed 1832 * and/or reset. 1833 */ 1834 TAILQ_FOREACH_MUTABLE(ni, &nt->nt_node, ni_list, next) 1835 if (ni->ni_wdsvap == match) 1836 ni->ni_wdsvap = NULL; 1837 } 1838 } 1839 1840 static void 1841 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1842 { 1843 ieee80211_node_table_reset(nt, NULL); 1844 if (nt->nt_keyixmap != NULL) { 1845 #ifdef DIAGNOSTIC 1846 /* XXX verify all entries are NULL */ 1847 int i; 1848 for (i = 0; i < nt->nt_keyixmax; i++) 1849 if (nt->nt_keyixmap[i] != NULL) 1850 kprintf("%s: %s[%u] still active\n", __func__, 1851 nt->nt_name, i); 1852 #endif 1853 kfree(nt->nt_keyixmap, M_80211_NODE); 1854 nt->nt_keyixmap = NULL; 1855 } 1856 } 1857 1858 /* 1859 * Timeout inactive stations and do related housekeeping. 1860 * Note that we cannot hold the node lock while sending a 1861 * frame as this would lead to a LOR. Instead we use a 1862 * generation number to mark nodes that we've scanned and 1863 * drop the lock and restart a scan if we have to time out 1864 * a node. Since we are single-threaded by virtue of 1865 * controlling the inactivity timer we can be sure this will 1866 * process each node only once. 1867 */ 1868 static void 1869 ieee80211_timeout_stations(struct ieee80211com *ic) 1870 { 1871 struct ieee80211_node_table *nt = &ic->ic_sta; 1872 struct ieee80211vap *vap; 1873 struct ieee80211_node *ni; 1874 int gen = 0; 1875 1876 gen = ++nt->nt_scangen; 1877 restart: 1878 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1879 if (ni->ni_scangen == gen) /* previously handled */ 1880 continue; 1881 ni->ni_scangen = gen; 1882 /* 1883 * Ignore entries for which have yet to receive an 1884 * authentication frame. These are transient and 1885 * will be reclaimed when the last reference to them 1886 * goes away (when frame xmits complete). 1887 */ 1888 vap = ni->ni_vap; 1889 /* 1890 * Only process stations when in RUN state. This 1891 * insures, for example, that we don't timeout an 1892 * inactive station during CAC. Note that CSA state 1893 * is actually handled in ieee80211_node_timeout as 1894 * it applies to more than timeout processing. 1895 */ 1896 if (vap->iv_state != IEEE80211_S_RUN) 1897 continue; 1898 /* XXX can vap be NULL? */ 1899 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1900 vap->iv_opmode == IEEE80211_M_STA) && 1901 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1902 continue; 1903 /* 1904 * Free fragment if not needed anymore 1905 * (last fragment older than 1s). 1906 * XXX doesn't belong here, move to node_age 1907 */ 1908 if (ni->ni_rxfrag[0] != NULL && 1909 ticks > ni->ni_rxfragstamp + hz) { 1910 m_freem(ni->ni_rxfrag[0]); 1911 ni->ni_rxfrag[0] = NULL; 1912 } 1913 if (ni->ni_inact > 0) { 1914 ni->ni_inact--; 1915 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1916 "%s: inact %u inact_reload %u nrates %u", 1917 __func__, ni->ni_inact, ni->ni_inact_reload, 1918 ni->ni_rates.rs_nrates); 1919 } 1920 /* 1921 * Special case ourself; we may be idle for extended periods 1922 * of time and regardless reclaiming our state is wrong. 1923 * XXX run ic_node_age 1924 */ 1925 if (ni == vap->iv_bss) 1926 continue; 1927 if (ni->ni_associd != 0 || 1928 (vap->iv_opmode == IEEE80211_M_IBSS || 1929 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1930 /* 1931 * Age/drain resources held by the station. 1932 */ 1933 ic->ic_node_age(ni); 1934 /* 1935 * Probe the station before time it out. We 1936 * send a null data frame which may not be 1937 * universally supported by drivers (need it 1938 * for ps-poll support so it should be...). 1939 * 1940 * XXX don't probe the station unless we've 1941 * received a frame from them (and have 1942 * some idea of the rates they are capable 1943 * of); this will get fixed more properly 1944 * soon with better handling of the rate set. 1945 */ 1946 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1947 (0 < ni->ni_inact && 1948 ni->ni_inact <= vap->iv_inact_probe) && 1949 ni->ni_rates.rs_nrates != 0) { 1950 IEEE80211_NOTE(vap, 1951 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1952 ni, "%s", 1953 "probe station due to inactivity"); 1954 /* 1955 * Grab a reference before unlocking the table 1956 * so the node cannot be reclaimed before we 1957 * send the frame. ieee80211_send_nulldata 1958 * understands we've done this and reclaims the 1959 * ref for us as needed. 1960 */ 1961 ieee80211_ref_node(ni); 1962 ieee80211_send_nulldata(ni); 1963 /* XXX stat? */ 1964 goto restart; 1965 } 1966 } 1967 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1968 ni->ni_inact <= 0) { 1969 IEEE80211_NOTE(vap, 1970 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1971 "station timed out due to inactivity " 1972 "(refcnt %u)", ieee80211_node_refcnt(ni)); 1973 /* 1974 * Send a deauthenticate frame and drop the station. 1975 * This is somewhat complicated due to reference counts 1976 * and locking. At this point a station will typically 1977 * have a reference count of 1. ieee80211_node_leave 1978 * will do a "free" of the node which will drop the 1979 * reference count. But in the meantime a reference 1980 * wil be held by the deauth frame. The actual reclaim 1981 * of the node will happen either after the tx is 1982 * completed or by ieee80211_node_leave. 1983 * 1984 * Separately we must drop the node lock before sending 1985 * in case the driver takes a lock, as this can result 1986 * in a LOR between the node lock and the driver lock. 1987 */ 1988 ieee80211_ref_node(ni); 1989 if (ni->ni_associd != 0) { 1990 IEEE80211_SEND_MGMT(ni, 1991 IEEE80211_FC0_SUBTYPE_DEAUTH, 1992 IEEE80211_REASON_AUTH_EXPIRE); 1993 } 1994 ieee80211_node_leave(ni); 1995 ieee80211_free_node(ni); 1996 vap->iv_stats.is_node_timeout++; 1997 goto restart; 1998 } 1999 } 2000 } 2001 2002 /* 2003 * Aggressively reclaim resources. This should be used 2004 * only in a critical situation to reclaim mbuf resources. 2005 */ 2006 void 2007 ieee80211_drain(struct ieee80211com *ic) 2008 { 2009 struct ieee80211_node_table *nt = &ic->ic_sta; 2010 struct ieee80211vap *vap; 2011 struct ieee80211_node *ni; 2012 2013 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2014 /* 2015 * Ignore entries for which have yet to receive an 2016 * authentication frame. These are transient and 2017 * will be reclaimed when the last reference to them 2018 * goes away (when frame xmits complete). 2019 */ 2020 vap = ni->ni_vap; 2021 /* 2022 * Only process stations when in RUN state. This 2023 * insures, for example, that we don't timeout an 2024 * inactive station during CAC. Note that CSA state 2025 * is actually handled in ieee80211_node_timeout as 2026 * it applies to more than timeout processing. 2027 */ 2028 if (vap->iv_state != IEEE80211_S_RUN) 2029 continue; 2030 /* XXX can vap be NULL? */ 2031 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2032 vap->iv_opmode == IEEE80211_M_STA) && 2033 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2034 continue; 2035 /* 2036 * Free fragments. 2037 * XXX doesn't belong here, move to node_drain 2038 */ 2039 if (ni->ni_rxfrag[0] != NULL) { 2040 m_freem(ni->ni_rxfrag[0]); 2041 ni->ni_rxfrag[0] = NULL; 2042 } 2043 /* 2044 * Drain resources held by the station. 2045 */ 2046 ic->ic_node_drain(ni); 2047 } 2048 } 2049 2050 /* 2051 * Per-ieee80211com inactivity timer callback. 2052 */ 2053 static void 2054 ieee80211_node_timeout_callout(void *arg) 2055 { 2056 struct ieee80211com *ic = arg; 2057 2058 /* 2059 * Defer timeout processing if a channel switch is pending. 2060 * We typically need to be mute so not doing things that 2061 * might generate frames is good to handle in one place. 2062 * Supressing the station timeout processing may extend the 2063 * lifetime of inactive stations (by not decrementing their 2064 * idle counters) but this should be ok unless the CSA is 2065 * active for an unusually long time. 2066 */ 2067 wlan_serialize_enter(); 2068 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2069 ieee80211_scan_timeout(ic); 2070 ieee80211_timeout_stations(ic); 2071 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2072 2073 ieee80211_erp_timeout(ic); 2074 ieee80211_ht_timeout(ic); 2075 } 2076 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2077 ieee80211_node_timeout_callout, ic); 2078 wlan_serialize_exit(); 2079 } 2080 2081 void 2082 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2083 ieee80211_iter_func *f, void *arg) 2084 { 2085 struct ieee80211_node *ni; 2086 u_int gen; 2087 2088 gen = ++nt->nt_scangen; 2089 restart: 2090 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2091 if (ni->ni_scangen != gen) { 2092 ni->ni_scangen = gen; 2093 (void) ieee80211_ref_node(ni); 2094 (*f)(arg, ni); 2095 ieee80211_free_node(ni); 2096 goto restart; 2097 } 2098 } 2099 } 2100 2101 void 2102 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2103 { 2104 kprintf("0x%p: mac %6D refcnt %d\n", ni, ni->ni_macaddr, ":", 2105 ieee80211_node_refcnt(ni)); 2106 kprintf("\tscangen %u authmode %u flags 0x%x\n", 2107 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2108 kprintf("\tassocid 0x%x txpower %u vlan %u\n", 2109 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2110 kprintf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2111 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2112 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2113 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2114 ni->ni_rxfragstamp); 2115 kprintf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2116 node_getrssi(ni), ni->ni_noise, 2117 ni->ni_intval, ni->ni_capinfo); 2118 kprintf("\tbssid %6D essid \"%.*s\" channel %u:0x%x\n", 2119 ni->ni_bssid, ":", 2120 ni->ni_esslen, ni->ni_essid, 2121 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2122 kprintf("\tinact %u inact_reload %u txrate %u\n", 2123 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2124 kprintf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2125 ni->ni_htcap, ni->ni_htparam, 2126 ni->ni_htctlchan, ni->ni_ht2ndchan); 2127 kprintf("\thtopmode %x htstbc %x chw %u\n", 2128 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2129 } 2130 2131 void 2132 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2133 { 2134 ieee80211_iterate_nodes(nt, 2135 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2136 } 2137 2138 static void 2139 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2140 { 2141 struct ieee80211vap *vap; 2142 2143 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2144 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2145 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2146 } 2147 2148 void 2149 ieee80211_notify_erp(struct ieee80211com *ic) 2150 { 2151 ieee80211_notify_erp_locked(ic); 2152 } 2153 2154 /* 2155 * Handle a station joining an 11g network. 2156 */ 2157 static void 2158 ieee80211_node_join_11g(struct ieee80211_node *ni) 2159 { 2160 struct ieee80211com *ic = ni->ni_ic; 2161 2162 /* 2163 * Station isn't capable of short slot time. Bump 2164 * the count of long slot time stations and disable 2165 * use of short slot time. Note that the actual switch 2166 * over to long slot time use may not occur until the 2167 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2168 */ 2169 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2170 ic->ic_longslotsta++; 2171 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2172 "station needs long slot time, count %d", 2173 ic->ic_longslotsta); 2174 /* XXX vap's w/ conflicting needs won't work */ 2175 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2176 /* 2177 * Don't force slot time when switched to turbo 2178 * mode as non-ERP stations won't be present; this 2179 * need only be done when on the normal G channel. 2180 */ 2181 ieee80211_set_shortslottime(ic, 0); 2182 } 2183 } 2184 /* 2185 * If the new station is not an ERP station 2186 * then bump the counter and enable protection 2187 * if configured. 2188 */ 2189 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2190 ic->ic_nonerpsta++; 2191 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2192 "station is !ERP, %d non-ERP stations associated", 2193 ic->ic_nonerpsta); 2194 /* 2195 * If station does not support short preamble 2196 * then we must enable use of Barker preamble. 2197 */ 2198 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2199 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2200 "%s", "station needs long preamble"); 2201 ic->ic_flags |= IEEE80211_F_USEBARKER; 2202 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2203 } 2204 /* 2205 * If protection is configured and this is the first 2206 * indication we should use protection, enable it. 2207 */ 2208 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2209 ic->ic_nonerpsta == 1 && 2210 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2211 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2212 "%s: enable use of protection\n", __func__); 2213 ic->ic_flags |= IEEE80211_F_USEPROT; 2214 ieee80211_notify_erp_locked(ic); 2215 } 2216 } else 2217 ni->ni_flags |= IEEE80211_NODE_ERP; 2218 } 2219 2220 void 2221 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2222 { 2223 struct ieee80211com *ic = ni->ni_ic; 2224 struct ieee80211vap *vap = ni->ni_vap; 2225 int newassoc; 2226 2227 if (ni->ni_associd == 0) { 2228 uint16_t aid; 2229 2230 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2231 /* 2232 * It would be good to search the bitmap 2233 * more efficiently, but this will do for now. 2234 */ 2235 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2236 if (!IEEE80211_AID_ISSET(vap, aid)) 2237 break; 2238 } 2239 if (aid >= vap->iv_max_aid) { 2240 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2241 ieee80211_node_leave(ni); 2242 return; 2243 } 2244 ni->ni_associd = aid | 0xc000; 2245 ni->ni_jointime = time_second; 2246 IEEE80211_AID_SET(vap, ni->ni_associd); 2247 vap->iv_sta_assoc++; 2248 ic->ic_sta_assoc++; 2249 2250 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2251 ieee80211_ht_node_join(ni); 2252 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2253 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2254 ieee80211_node_join_11g(ni); 2255 2256 newassoc = 1; 2257 } else 2258 newassoc = 0; 2259 2260 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2261 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2262 IEEE80211_NODE_AID(ni), 2263 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2264 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2265 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2266 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2267 ni->ni_flags & IEEE80211_NODE_HT ? 2268 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2269 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2270 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2271 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2272 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2273 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2274 ", fast-frames" : "", 2275 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2276 ", turbo" : "" 2277 ); 2278 2279 ieee80211_node_setuptxparms(ni); 2280 /* give driver a chance to setup state like ni_txrate */ 2281 if (ic->ic_newassoc != NULL) 2282 ic->ic_newassoc(ni, newassoc); 2283 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2284 /* tell the authenticator about new station */ 2285 if (vap->iv_auth->ia_node_join != NULL) 2286 vap->iv_auth->ia_node_join(ni); 2287 ieee80211_notify_node_join(ni, 2288 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2289 } 2290 2291 static void 2292 disable_protection(struct ieee80211com *ic) 2293 { 2294 KASSERT(ic->ic_nonerpsta == 0 && 2295 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2296 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2297 ic->ic_flags_ext)); 2298 2299 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2300 /* XXX verify mode? */ 2301 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2302 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2303 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2304 } 2305 ieee80211_notify_erp_locked(ic); 2306 } 2307 2308 /* 2309 * Handle a station leaving an 11g network. 2310 */ 2311 static void 2312 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2313 { 2314 struct ieee80211com *ic = ni->ni_ic; 2315 2316 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2317 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2318 ic->ic_bsschan->ic_flags)); 2319 2320 /* 2321 * If a long slot station do the slot time bookkeeping. 2322 */ 2323 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2324 KASSERT(ic->ic_longslotsta > 0, 2325 ("bogus long slot station count %d", ic->ic_longslotsta)); 2326 ic->ic_longslotsta--; 2327 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2328 "long slot time station leaves, count now %d", 2329 ic->ic_longslotsta); 2330 if (ic->ic_longslotsta == 0) { 2331 /* 2332 * Re-enable use of short slot time if supported 2333 * and not operating in IBSS mode (per spec). 2334 */ 2335 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2336 ic->ic_opmode != IEEE80211_M_IBSS) { 2337 IEEE80211_DPRINTF(ni->ni_vap, 2338 IEEE80211_MSG_ASSOC, 2339 "%s: re-enable use of short slot time\n", 2340 __func__); 2341 ieee80211_set_shortslottime(ic, 1); 2342 } 2343 } 2344 } 2345 /* 2346 * If a non-ERP station do the protection-related bookkeeping. 2347 */ 2348 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2349 KASSERT(ic->ic_nonerpsta > 0, 2350 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2351 ic->ic_nonerpsta--; 2352 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2353 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2354 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2355 " (non-ERP sta present)" : ""); 2356 if (ic->ic_nonerpsta == 0 && 2357 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2358 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2359 "%s: disable use of protection\n", __func__); 2360 disable_protection(ic); 2361 } 2362 } 2363 } 2364 2365 /* 2366 * Time out presence of an overlapping bss with non-ERP 2367 * stations. When operating in hostap mode we listen for 2368 * beacons from other stations and if we identify a non-ERP 2369 * station is present we enable protection. To identify 2370 * when all non-ERP stations are gone we time out this 2371 * condition. 2372 */ 2373 static void 2374 ieee80211_erp_timeout(struct ieee80211com *ic) 2375 { 2376 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2377 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2378 #if 0 2379 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2380 "%s", "age out non-ERP sta present on channel"); 2381 #endif 2382 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2383 if (ic->ic_nonerpsta == 0) 2384 disable_protection(ic); 2385 } 2386 } 2387 2388 /* 2389 * Handle bookkeeping for station deauthentication/disassociation 2390 * when operating as an ap. 2391 */ 2392 void 2393 ieee80211_node_leave(struct ieee80211_node *ni) 2394 { 2395 struct ieee80211com *ic = ni->ni_ic; 2396 struct ieee80211vap *vap = ni->ni_vap; 2397 struct ieee80211_node_table *nt = ni->ni_table; 2398 2399 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2400 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2401 2402 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2403 ("unexpected operating mode %u", vap->iv_opmode)); 2404 /* 2405 * If node wasn't previously associated all 2406 * we need to do is reclaim the reference. 2407 */ 2408 /* XXX ibss mode bypasses 11g and notification */ 2409 if (ni->ni_associd == 0) 2410 goto done; 2411 /* 2412 * Tell the authenticator the station is leaving. 2413 * Note that we must do this before yanking the 2414 * association id as the authenticator uses the 2415 * associd to locate it's state block. 2416 */ 2417 if (vap->iv_auth->ia_node_leave != NULL) 2418 vap->iv_auth->ia_node_leave(ni); 2419 2420 IEEE80211_AID_CLR(vap, ni->ni_associd); 2421 ni->ni_associd = 0; 2422 vap->iv_sta_assoc--; 2423 ic->ic_sta_assoc--; 2424 2425 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2426 ieee80211_ht_node_leave(ni); 2427 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2428 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2429 ieee80211_node_leave_11g(ni); 2430 /* 2431 * Cleanup station state. In particular clear various 2432 * state that might otherwise be reused if the node 2433 * is reused before the reference count goes to zero 2434 * (and memory is reclaimed). 2435 */ 2436 ieee80211_sta_leave(ni); 2437 done: 2438 /* 2439 * Remove the node from any table it's recorded in and 2440 * drop the caller's reference. Removal from the table 2441 * is important to insure the node is not reprocessed 2442 * for inactivity. 2443 */ 2444 if (nt != NULL) { 2445 node_reclaim(nt, ni); 2446 } else 2447 ieee80211_free_node(ni); 2448 } 2449 2450 struct rssiinfo { 2451 struct ieee80211vap *vap; 2452 int rssi_samples; 2453 uint32_t rssi_total; 2454 }; 2455 2456 static void 2457 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2458 { 2459 struct rssiinfo *info = arg; 2460 struct ieee80211vap *vap = ni->ni_vap; 2461 int8_t rssi; 2462 2463 if (info->vap != vap) 2464 return; 2465 /* only associated stations */ 2466 if (ni->ni_associd == 0) 2467 return; 2468 rssi = vap->iv_ic->ic_node_getrssi(ni); 2469 if (rssi != 0) { 2470 info->rssi_samples++; 2471 info->rssi_total += rssi; 2472 } 2473 } 2474 2475 static void 2476 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2477 { 2478 struct rssiinfo *info = arg; 2479 struct ieee80211vap *vap = ni->ni_vap; 2480 int8_t rssi; 2481 2482 if (info->vap != vap) 2483 return; 2484 /* only neighbors */ 2485 /* XXX check bssid */ 2486 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2487 return; 2488 rssi = vap->iv_ic->ic_node_getrssi(ni); 2489 if (rssi != 0) { 2490 info->rssi_samples++; 2491 info->rssi_total += rssi; 2492 } 2493 } 2494 2495 #ifdef IEEE80211_SUPPORT_MESH 2496 static void 2497 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2498 { 2499 struct rssiinfo *info = arg; 2500 struct ieee80211vap *vap = ni->ni_vap; 2501 int8_t rssi; 2502 2503 if (info->vap != vap) 2504 return; 2505 /* only neighbors that peered successfully */ 2506 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2507 return; 2508 rssi = vap->iv_ic->ic_node_getrssi(ni); 2509 if (rssi != 0) { 2510 info->rssi_samples++; 2511 info->rssi_total += rssi; 2512 } 2513 } 2514 #endif /* IEEE80211_SUPPORT_MESH */ 2515 2516 int8_t 2517 ieee80211_getrssi(struct ieee80211vap *vap) 2518 { 2519 #define NZ(x) ((x) == 0 ? 1 : (x)) 2520 struct ieee80211com *ic = vap->iv_ic; 2521 struct rssiinfo info; 2522 2523 info.rssi_total = 0; 2524 info.rssi_samples = 0; 2525 info.vap = vap; 2526 switch (vap->iv_opmode) { 2527 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2528 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2529 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2530 break; 2531 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2532 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2533 break; 2534 #ifdef IEEE80211_SUPPORT_MESH 2535 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2536 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2537 break; 2538 #endif 2539 case IEEE80211_M_MONITOR: /* XXX */ 2540 case IEEE80211_M_STA: /* use stats from associated ap */ 2541 default: 2542 if (vap->iv_bss != NULL) 2543 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2544 info.rssi_samples = 1; 2545 break; 2546 } 2547 return info.rssi_total / NZ(info.rssi_samples); 2548 #undef NZ 2549 } 2550 2551 void 2552 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2553 { 2554 2555 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2556 return; 2557 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2558 /* for non-station mode return avg'd rssi accounting */ 2559 if (vap->iv_opmode != IEEE80211_M_STA) 2560 *rssi = ieee80211_getrssi(vap); 2561 } 2562