1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_wlan.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/mbuf.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 38 #include <sys/socket.h> 39 40 #include <net/if.h> 41 #include <net/if_var.h> 42 #include <net/if_media.h> 43 #include <net/ethernet.h> 44 45 #include <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_drain(&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 * We must install the legacy rate est in ni_rates and the 290 * HT rate set in ni_htrates. 291 */ 292 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 293 /* 294 * Setup bss tx parameters based on operating mode. We 295 * use legacy rates when operating in a mixed HT+non-HT bss 296 * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 297 */ 298 if (mode == IEEE80211_MODE_11NA && 299 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 300 mode = IEEE80211_MODE_11A; 301 else if (mode == IEEE80211_MODE_11NG && 302 (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) 303 mode = IEEE80211_MODE_11G; 304 if (mode == IEEE80211_MODE_11G && 305 (vap->iv_flags & IEEE80211_F_PUREG) == 0) 306 mode = IEEE80211_MODE_11B; 307 } 308 ni->ni_txparms = &vap->iv_txparms[mode]; 309 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 310 } 311 312 static __inline void 313 copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 314 { 315 /* propagate useful state */ 316 nbss->ni_authmode = obss->ni_authmode; 317 nbss->ni_txpower = obss->ni_txpower; 318 nbss->ni_vlan = obss->ni_vlan; 319 /* XXX statistics? */ 320 /* XXX legacy WDS bssid? */ 321 } 322 323 void 324 ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 325 { 326 struct ieee80211com *ic = vap->iv_ic; 327 struct ieee80211_node *ni; 328 329 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 330 "%s: creating %s on channel %u\n", __func__, 331 ieee80211_opmode_name[vap->iv_opmode], 332 ieee80211_chan2ieee(ic, chan)); 333 334 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 335 if (ni == NULL) { 336 /* XXX recovery? */ 337 return; 338 } 339 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 340 ni->ni_esslen = vap->iv_des_ssid[0].len; 341 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 342 if (vap->iv_bss != NULL) 343 copy_bss(ni, vap->iv_bss); 344 ni->ni_intval = ic->ic_bintval; 345 if (vap->iv_flags & IEEE80211_F_PRIVACY) 346 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 347 if (ic->ic_phytype == IEEE80211_T_FH) { 348 ni->ni_fhdwell = 200; /* XXX */ 349 ni->ni_fhindex = 1; 350 } 351 if (vap->iv_opmode == IEEE80211_M_IBSS) { 352 vap->iv_flags |= IEEE80211_F_SIBSS; 353 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 354 if (vap->iv_flags & IEEE80211_F_DESBSSID) 355 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 356 else { 357 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 358 /* clear group bit, add local bit */ 359 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 360 } 361 } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 362 if (vap->iv_flags & IEEE80211_F_DESBSSID) 363 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 364 else 365 #ifdef IEEE80211_SUPPORT_TDMA 366 if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) 367 #endif 368 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 369 #ifdef IEEE80211_SUPPORT_MESH 370 } else if (vap->iv_opmode == IEEE80211_M_MBSS) { 371 ni->ni_meshidlen = vap->iv_mesh->ms_idlen; 372 memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); 373 #endif 374 } 375 /* 376 * Fix the channel and related attributes. 377 */ 378 /* clear DFS CAC state on previous channel */ 379 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 380 ic->ic_bsschan->ic_freq != chan->ic_freq && 381 IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 382 ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 383 ic->ic_bsschan = chan; 384 ieee80211_node_set_chan(ni, chan); 385 ic->ic_curmode = ieee80211_chan2mode(chan); 386 /* 387 * Do mode-specific setup. 388 */ 389 if (IEEE80211_IS_CHAN_FULL(chan)) { 390 if (IEEE80211_IS_CHAN_ANYG(chan)) { 391 /* 392 * Use a mixed 11b/11g basic rate set. 393 */ 394 ieee80211_setbasicrates(&ni->ni_rates, 395 IEEE80211_MODE_11G); 396 if (vap->iv_flags & IEEE80211_F_PUREG) { 397 /* 398 * Also mark OFDM rates basic so 11b 399 * stations do not join (WiFi compliance). 400 */ 401 ieee80211_addbasicrates(&ni->ni_rates, 402 IEEE80211_MODE_11A); 403 } 404 } else if (IEEE80211_IS_CHAN_B(chan)) { 405 /* 406 * Force pure 11b rate set. 407 */ 408 ieee80211_setbasicrates(&ni->ni_rates, 409 IEEE80211_MODE_11B); 410 } 411 } 412 413 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 414 } 415 416 /* 417 * Reset bss state on transition to the INIT state. 418 * Clear any stations from the table (they have been 419 * deauth'd) and reset the bss node (clears key, rate 420 * etc. state). 421 */ 422 void 423 ieee80211_reset_bss(struct ieee80211vap *vap) 424 { 425 struct ieee80211com *ic = vap->iv_ic; 426 struct ieee80211_node *ni, *obss; 427 428 ieee80211_node_table_reset(&ic->ic_sta, vap); 429 /* XXX multi-bss: wrong */ 430 ieee80211_reset_erp(ic); 431 432 ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 433 KASSERT(ni != NULL, ("unable to setup initial BSS node")); 434 obss = vap->iv_bss; 435 vap->iv_bss = ieee80211_ref_node(ni); 436 if (obss != NULL) { 437 copy_bss(ni, obss); 438 ni->ni_intval = ic->ic_bintval; 439 ieee80211_free_node(obss); 440 } else 441 IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 442 } 443 444 static int 445 match_ssid(const struct ieee80211_node *ni, 446 int nssid, const struct ieee80211_scan_ssid ssids[]) 447 { 448 int i; 449 450 for (i = 0; i < nssid; i++) { 451 if (ni->ni_esslen == ssids[i].len && 452 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 453 return 1; 454 } 455 return 0; 456 } 457 458 /* 459 * Test a node for suitability/compatibility. 460 */ 461 static int 462 check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 463 { 464 struct ieee80211com *ic = ni->ni_ic; 465 uint8_t rate; 466 467 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 468 return 0; 469 if (vap->iv_opmode == IEEE80211_M_IBSS) { 470 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 471 return 0; 472 } else { 473 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 474 return 0; 475 } 476 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 477 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 478 return 0; 479 } else { 480 /* XXX does this mean privacy is supported or required? */ 481 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 482 return 0; 483 } 484 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 485 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 486 if (rate & IEEE80211_RATE_BASIC) 487 return 0; 488 if (vap->iv_des_nssid != 0 && 489 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 490 return 0; 491 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 492 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 493 return 0; 494 return 1; 495 } 496 497 #ifdef IEEE80211_DEBUG 498 /* 499 * Display node suitability/compatibility. 500 */ 501 static void 502 check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 503 { 504 struct ieee80211com *ic = ni->ni_ic; 505 uint8_t rate; 506 int fail; 507 508 fail = 0; 509 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 510 fail |= 0x01; 511 if (vap->iv_opmode == IEEE80211_M_IBSS) { 512 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 513 fail |= 0x02; 514 } else { 515 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 516 fail |= 0x02; 517 } 518 if (vap->iv_flags & IEEE80211_F_PRIVACY) { 519 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 520 fail |= 0x04; 521 } else { 522 /* XXX does this mean privacy is supported or required? */ 523 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 524 fail |= 0x04; 525 } 526 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 527 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 528 if (rate & IEEE80211_RATE_BASIC) 529 fail |= 0x08; 530 if (vap->iv_des_nssid != 0 && 531 !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 532 fail |= 0x10; 533 if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 534 !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 535 fail |= 0x20; 536 537 kprintf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 538 kprintf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 539 kprintf(" %3d%c", 540 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 541 kprintf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 542 fail & 0x08 ? '!' : ' '); 543 kprintf(" %4s%c", 544 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 545 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 546 "????", 547 fail & 0x02 ? '!' : ' '); 548 kprintf(" %3s%c ", 549 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 550 fail & 0x04 ? '!' : ' '); 551 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 552 kprintf("%s\n", fail & 0x10 ? "!" : ""); 553 } 554 #endif /* IEEE80211_DEBUG */ 555 556 /* 557 * Handle 802.11 ad hoc network merge. The 558 * convention, set by the Wireless Ethernet Compatibility Alliance 559 * (WECA), is that an 802.11 station will change its BSSID to match 560 * the "oldest" 802.11 ad hoc network, on the same channel, that 561 * has the station's desired SSID. The "oldest" 802.11 network 562 * sends beacons with the greatest TSF timestamp. 563 * 564 * The caller is assumed to validate TSF's before attempting a merge. 565 * 566 * Return !0 if the BSSID changed, 0 otherwise. 567 */ 568 int 569 ieee80211_ibss_merge(struct ieee80211_node *ni) 570 { 571 struct ieee80211vap *vap = ni->ni_vap; 572 #ifdef IEEE80211_DEBUG 573 struct ieee80211com *ic = ni->ni_ic; 574 #endif 575 576 if (ni == vap->iv_bss || 577 IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 578 /* unchanged, nothing to do */ 579 return 0; 580 } 581 if (!check_bss(vap, ni)) { 582 /* capabilities mismatch */ 583 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 584 "%s: merge failed, capabilities mismatch\n", __func__); 585 #ifdef IEEE80211_DEBUG 586 if (ieee80211_msg_assoc(vap)) 587 check_bss_debug(vap, ni); 588 #endif 589 vap->iv_stats.is_ibss_capmismatch++; 590 return 0; 591 } 592 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 593 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 594 ether_sprintf(ni->ni_bssid), 595 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 596 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 597 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 598 ); 599 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 600 } 601 602 /* 603 * Calculate HT channel promotion flags for all vaps. 604 * This assumes ni_chan have been setup for each vap. 605 */ 606 static int 607 gethtadjustflags(struct ieee80211com *ic) 608 { 609 struct ieee80211vap *vap; 610 int flags; 611 612 flags = 0; 613 /* XXX locking */ 614 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 615 if (vap->iv_state < IEEE80211_S_RUN) 616 continue; 617 switch (vap->iv_opmode) { 618 case IEEE80211_M_WDS: 619 case IEEE80211_M_STA: 620 case IEEE80211_M_AHDEMO: 621 case IEEE80211_M_HOSTAP: 622 case IEEE80211_M_IBSS: 623 case IEEE80211_M_MBSS: 624 flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 625 break; 626 default: 627 break; 628 } 629 } 630 return flags; 631 } 632 633 /* 634 * Check if the current channel needs to change based on whether 635 * any vap's are using HT20/HT40. This is used to sync the state 636 * of ic_curchan after a channel width change on a running vap. 637 */ 638 void 639 ieee80211_sync_curchan(struct ieee80211com *ic) 640 { 641 struct ieee80211_channel *c; 642 643 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 644 if (c != ic->ic_curchan) { 645 ic->ic_curchan = c; 646 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 647 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 648 IEEE80211_UNLOCK(ic); 649 ic->ic_set_channel(ic); 650 ieee80211_radiotap_chan_change(ic); 651 IEEE80211_LOCK(ic); 652 } 653 } 654 655 /* 656 * Setup the current channel. The request channel may be 657 * promoted if other vap's are operating with HT20/HT40. 658 */ 659 void 660 ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 661 { 662 if (ic->ic_htcaps & IEEE80211_HTC_HT) { 663 int flags = gethtadjustflags(ic); 664 /* 665 * Check for channel promotion required to support the 666 * set of running vap's. This assumes we are called 667 * after ni_chan is setup for each vap. 668 */ 669 /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ 670 if (flags > ieee80211_htchanflags(c)) 671 c = ieee80211_ht_adjust_channel(ic, c, flags); 672 } 673 ic->ic_bsschan = ic->ic_curchan = c; 674 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 675 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); 676 } 677 678 /* 679 * Change the current channel. The channel change is guaranteed to have 680 * happened before the next state change. 681 */ 682 void 683 ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 684 { 685 ieee80211_setupcurchan(ic, c); 686 ieee80211_runtask(ic, &ic->ic_chan_task); 687 } 688 689 void 690 ieee80211_update_chw(struct ieee80211com *ic) 691 { 692 693 ieee80211_setupcurchan(ic, ic->ic_curchan); 694 ieee80211_runtask(ic, &ic->ic_chw_task); 695 } 696 697 /* 698 * Join the specified IBSS/BSS network. The node is assumed to 699 * be passed in with a held reference. 700 */ 701 static int 702 ieee80211_sta_join1(struct ieee80211_node *selbs) 703 { 704 struct ieee80211vap *vap = selbs->ni_vap; 705 struct ieee80211com *ic = selbs->ni_ic; 706 struct ieee80211_node *obss; 707 int canreassoc; 708 709 /* 710 * Committed to selbs, setup state. 711 */ 712 obss = vap->iv_bss; 713 /* 714 * Check if old+new node have the same address in which 715 * case we can reassociate when operating in sta mode. 716 */ 717 canreassoc = (obss != NULL && 718 vap->iv_state == IEEE80211_S_RUN && 719 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 720 vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 721 if (obss != NULL) { 722 copy_bss(selbs, obss); 723 ieee80211_node_decref(obss); /* iv_bss reference */ 724 ieee80211_free_node(obss); /* station table reference */ 725 obss = NULL; /* NB: guard against later use */ 726 } 727 728 /* 729 * Delete unusable rates; we've already checked 730 * that the negotiated rate set is acceptable. 731 */ 732 ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 733 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 734 735 ieee80211_setcurchan(ic, selbs->ni_chan); 736 /* 737 * Set the erp state (mostly the slot time) to deal with 738 * the auto-select case; this should be redundant if the 739 * mode is locked. 740 */ 741 ieee80211_reset_erp(ic); 742 ieee80211_wme_initparams(vap); 743 744 if (vap->iv_opmode == IEEE80211_M_STA) { 745 if (canreassoc) { 746 /* Reassociate */ 747 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 748 } else { 749 /* 750 * Act as if we received a DEAUTH frame in case we 751 * are invoked from the RUN state. This will cause 752 * us to try to re-authenticate if we are operating 753 * as a station. 754 */ 755 ieee80211_new_state(vap, IEEE80211_S_AUTH, 756 IEEE80211_FC0_SUBTYPE_DEAUTH); 757 } 758 } else 759 ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 760 return 1; 761 } 762 763 int 764 ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, 765 const struct ieee80211_scan_entry *se) 766 { 767 struct ieee80211com *ic = vap->iv_ic; 768 struct ieee80211_node *ni; 769 770 ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 771 if (ni == NULL) { 772 /* XXX msg */ 773 return 0; 774 } 775 776 /* 777 * Expand scan state into node's format. 778 * XXX may not need all this stuff 779 */ 780 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 781 ni->ni_esslen = se->se_ssid[1]; 782 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 783 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 784 ni->ni_intval = se->se_intval; 785 ni->ni_capinfo = se->se_capinfo; 786 ni->ni_chan = chan; 787 ni->ni_timoff = se->se_timoff; 788 ni->ni_fhdwell = se->se_fhdwell; 789 ni->ni_fhindex = se->se_fhindex; 790 ni->ni_erp = se->se_erp; 791 IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 792 ni->ni_noise = se->se_noise; 793 if (vap->iv_opmode == IEEE80211_M_STA) { 794 /* NB: only infrastructure mode requires an associd */ 795 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 796 } 797 798 if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 799 ieee80211_ies_expand(&ni->ni_ies); 800 #ifdef IEEE80211_SUPPORT_SUPERG 801 if (ni->ni_ies.ath_ie != NULL) 802 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 803 #endif 804 if (ni->ni_ies.htcap_ie != NULL) 805 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 806 if (ni->ni_ies.htinfo_ie != NULL) 807 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 808 #ifdef IEEE80211_SUPPORT_MESH 809 if (ni->ni_ies.meshid_ie != NULL) 810 ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); 811 #endif 812 #ifdef IEEE80211_SUPPORT_TDMA 813 if (ni->ni_ies.tdma_ie != NULL) 814 ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); 815 #endif 816 } 817 818 vap->iv_dtim_period = se->se_dtimperiod; 819 vap->iv_dtim_count = 0; 820 821 /* NB: must be after ni_chan is setup */ 822 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 823 IEEE80211_F_DOSORT); 824 if (ieee80211_iserp_rateset(&ni->ni_rates)) 825 ni->ni_flags |= IEEE80211_NODE_ERP; 826 827 /* 828 * Setup HT state for this node if it's available, otherwise 829 * non-STA modes won't pick this state up. 830 * 831 * For IBSS and related modes that don't go through an 832 * association request/response, the only appropriate place 833 * to setup the HT state is here. 834 */ 835 if (ni->ni_ies.htinfo_ie != NULL && 836 ni->ni_ies.htcap_ie != NULL && 837 vap->iv_flags_ht & IEEE80211_FHT_HT) { 838 ieee80211_ht_node_init(ni); 839 ieee80211_ht_updateparams(ni, 840 ni->ni_ies.htcap_ie, 841 ni->ni_ies.htinfo_ie); 842 ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, 843 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 844 ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); 845 } 846 /* XXX else check for ath FF? */ 847 /* XXX QoS? Difficult given that WME config is specific to a master */ 848 849 ieee80211_node_setuptxparms(ni); 850 ieee80211_ratectl_node_init(ni); 851 852 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 853 } 854 855 /* 856 * Leave the specified IBSS/BSS network. The node is assumed to 857 * be passed in with a held reference. 858 */ 859 void 860 ieee80211_sta_leave(struct ieee80211_node *ni) 861 { 862 struct ieee80211com *ic = ni->ni_ic; 863 864 ic->ic_node_cleanup(ni); 865 ieee80211_notify_node_leave(ni); 866 } 867 868 /* 869 * Send a deauthenticate frame and drop the station. 870 */ 871 void 872 ieee80211_node_deauth(struct ieee80211_node *ni, int reason) 873 { 874 /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 875 ieee80211_ref_node(ni); 876 if (ni->ni_associd != 0) 877 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 878 ieee80211_node_leave(ni); 879 ieee80211_free_node(ni); 880 } 881 882 static struct ieee80211_node * 883 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 884 { 885 struct ieee80211_node *ni; 886 887 ni = (struct ieee80211_node *) kmalloc(sizeof(struct ieee80211_node), 888 M_80211_NODE, M_INTWAIT | M_ZERO); 889 return ni; 890 } 891 892 /* 893 * Initialize an ie blob with the specified data. If previous 894 * data exists re-use the data block. As a side effect we clear 895 * all references to specific ie's; the caller is required to 896 * recalculate them. 897 */ 898 int 899 ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 900 { 901 /* NB: assumes data+len are the last fields */ 902 memset(ies, 0, offsetof(struct ieee80211_ies, data)); 903 if (ies->data != NULL && ies->len != len) { 904 /* data size changed */ 905 kfree(ies->data, M_80211_NODE_IE); 906 ies->data = NULL; 907 } 908 if (ies->data == NULL) { 909 ies->data = (uint8_t *) kmalloc(len, M_80211_NODE_IE, M_INTWAIT); 910 if (ies->data == NULL) { 911 ies->len = 0; 912 /* NB: pointers have already been zero'd above */ 913 return 0; 914 } 915 } 916 memcpy(ies->data, data, len); 917 ies->len = len; 918 return 1; 919 } 920 921 /* 922 * Reclaim storage for an ie blob. 923 */ 924 void 925 ieee80211_ies_cleanup(struct ieee80211_ies *ies) 926 { 927 if (ies->data != NULL) 928 kfree(ies->data, M_80211_NODE_IE); 929 } 930 931 /* 932 * Expand an ie blob data contents and to fillin individual 933 * ie pointers. The data blob is assumed to be well-formed; 934 * we don't do any validity checking of ie lengths. 935 */ 936 void 937 ieee80211_ies_expand(struct ieee80211_ies *ies) 938 { 939 uint8_t *ie; 940 int ielen; 941 942 ie = ies->data; 943 ielen = ies->len; 944 while (ielen > 0) { 945 switch (ie[0]) { 946 case IEEE80211_ELEMID_VENDOR: 947 if (iswpaoui(ie)) 948 ies->wpa_ie = ie; 949 else if (iswmeoui(ie)) 950 ies->wme_ie = ie; 951 #ifdef IEEE80211_SUPPORT_SUPERG 952 else if (isatherosoui(ie)) 953 ies->ath_ie = ie; 954 #endif 955 #ifdef IEEE80211_SUPPORT_TDMA 956 else if (istdmaoui(ie)) 957 ies->tdma_ie = ie; 958 #endif 959 break; 960 case IEEE80211_ELEMID_RSN: 961 ies->rsn_ie = ie; 962 break; 963 case IEEE80211_ELEMID_HTCAP: 964 ies->htcap_ie = ie; 965 break; 966 case IEEE80211_ELEMID_HTINFO: 967 ies->htinfo_ie = ie; 968 break; 969 #ifdef IEEE80211_SUPPORT_MESH 970 case IEEE80211_ELEMID_MESHID: 971 ies->meshid_ie = ie; 972 break; 973 #endif 974 } 975 ielen -= 2 + ie[1]; 976 ie += 2 + ie[1]; 977 } 978 } 979 980 /* 981 * Reclaim any resources in a node and reset any critical 982 * state. Typically nodes are free'd immediately after, 983 * but in some cases the storage may be reused so we need 984 * to insure consistent state (should probably fix that). 985 */ 986 static void 987 node_cleanup(struct ieee80211_node *ni) 988 { 989 struct ieee80211vap *vap = ni->ni_vap; 990 struct ieee80211com *ic = ni->ni_ic; 991 int i; 992 993 /* NB: preserve ni_table */ 994 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 995 if (vap->iv_opmode != IEEE80211_M_STA) 996 vap->iv_ps_sta--; 997 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 998 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 999 "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 1000 } 1001 /* 1002 * Cleanup any HT-related state. 1003 */ 1004 if (ni->ni_flags & IEEE80211_NODE_HT) 1005 ieee80211_ht_node_cleanup(ni); 1006 #ifdef IEEE80211_SUPPORT_SUPERG 1007 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 1008 ieee80211_ff_node_cleanup(ni); 1009 #endif 1010 #ifdef IEEE80211_SUPPORT_MESH 1011 /* 1012 * Cleanup any mesh-related state. 1013 */ 1014 if (vap->iv_opmode == IEEE80211_M_MBSS) 1015 ieee80211_mesh_node_cleanup(ni); 1016 #endif 1017 /* 1018 * Clear any staging queue entries. 1019 */ 1020 ieee80211_ageq_drain_node(&ic->ic_stageq, ni); 1021 1022 /* 1023 * Clear AREF flag that marks the authorization refcnt bump 1024 * has happened. This is probably not needed as the node 1025 * should always be removed from the table so not found but 1026 * do it just in case. 1027 * Likewise clear the ASSOCID flag as these flags are intended 1028 * to be managed in tandem. 1029 */ 1030 ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); 1031 1032 /* 1033 * Drain power save queue and, if needed, clear TIM. 1034 */ 1035 if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) 1036 vap->iv_set_tim(ni, 0); 1037 1038 ni->ni_associd = 0; 1039 if (ni->ni_challenge != NULL) { 1040 kfree(ni->ni_challenge, M_80211_NODE); 1041 ni->ni_challenge = NULL; 1042 } 1043 /* 1044 * Preserve SSID, WPA, and WME ie's so the bss node is 1045 * reusable during a re-auth/re-assoc state transition. 1046 * If we remove these data they will not be recreated 1047 * because they come from a probe-response or beacon frame 1048 * which cannot be expected prior to the association-response. 1049 * This should not be an issue when operating in other modes 1050 * as stations leaving always go through a full state transition 1051 * which will rebuild this state. 1052 * 1053 * XXX does this leave us open to inheriting old state? 1054 */ 1055 for (i = 0; i < nitems(ni->ni_rxfrag); i++) 1056 if (ni->ni_rxfrag[i] != NULL) { 1057 m_freem(ni->ni_rxfrag[i]); 1058 ni->ni_rxfrag[i] = NULL; 1059 } 1060 /* 1061 * Must be careful here to remove any key map entry w/o a LOR. 1062 */ 1063 ieee80211_node_delucastkey(ni); 1064 } 1065 1066 static void 1067 node_free(struct ieee80211_node *ni) 1068 { 1069 struct ieee80211com *ic = ni->ni_ic; 1070 1071 ieee80211_ratectl_node_deinit(ni); 1072 ic->ic_node_cleanup(ni); 1073 ieee80211_ies_cleanup(&ni->ni_ies); 1074 ieee80211_psq_cleanup(&ni->ni_psq); 1075 kfree(ni, M_80211_NODE); 1076 } 1077 1078 static void 1079 node_age(struct ieee80211_node *ni) 1080 { 1081 struct ieee80211vap *vap = ni->ni_vap; 1082 1083 IEEE80211_NODE_LOCK_ASSERT(&vap->iv_ic->ic_sta); 1084 1085 /* 1086 * Age frames on the power save queue. 1087 */ 1088 if (ieee80211_node_psq_age(ni) != 0 && 1089 ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) 1090 vap->iv_set_tim(ni, 0); 1091 /* 1092 * Age out HT resources (e.g. frames on the 1093 * A-MPDU reorder queues). 1094 */ 1095 if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 1096 ieee80211_ht_node_age(ni); 1097 } 1098 1099 static int8_t 1100 node_getrssi(const struct ieee80211_node *ni) 1101 { 1102 uint32_t avgrssi = ni->ni_avgrssi; 1103 int32_t rssi; 1104 1105 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 1106 return 0; 1107 rssi = IEEE80211_RSSI_GET(avgrssi); 1108 return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1109 } 1110 1111 static void 1112 node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 1113 { 1114 *rssi = node_getrssi(ni); 1115 *noise = ni->ni_noise; 1116 } 1117 1118 static void 1119 node_getmimoinfo(const struct ieee80211_node *ni, 1120 struct ieee80211_mimo_info *info) 1121 { 1122 int i; 1123 uint32_t avgrssi; 1124 int32_t rssi; 1125 1126 bzero(info, sizeof(*info)); 1127 1128 for (i = 0; i < ni->ni_mimo_chains; i++) { 1129 avgrssi = ni->ni_mimo_rssi_ctl[i]; 1130 if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { 1131 info->rssi[i] = 0; 1132 } else { 1133 rssi = IEEE80211_RSSI_GET(avgrssi); 1134 info->rssi[i] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 1135 } 1136 info->noise[i] = ni->ni_mimo_noise_ctl[i]; 1137 } 1138 1139 /* XXX ext radios? */ 1140 1141 /* XXX EVM? */ 1142 } 1143 1144 struct ieee80211_node * 1145 ieee80211_alloc_node(struct ieee80211_node_table *nt, 1146 struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1147 { 1148 struct ieee80211com *ic = nt->nt_ic; 1149 struct ieee80211_node *ni; 1150 int hash; 1151 1152 ni = ic->ic_node_alloc(vap, macaddr); 1153 if (ni == NULL) { 1154 vap->iv_stats.is_rx_nodealloc++; 1155 return NULL; 1156 } 1157 1158 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1159 "%s %p<%s> in %s table\n", __func__, ni, 1160 ether_sprintf(macaddr), nt->nt_name); 1161 1162 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1163 hash = IEEE80211_NODE_HASH(ic, macaddr); 1164 ieee80211_node_initref(ni); /* mark referenced */ 1165 ni->ni_chan = IEEE80211_CHAN_ANYC; 1166 ni->ni_authmode = IEEE80211_AUTH_OPEN; 1167 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1168 ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1169 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1170 ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1171 ni->ni_inact_reload = nt->nt_inact_init; 1172 ni->ni_inact = ni->ni_inact_reload; 1173 ni->ni_ath_defkeyix = 0x7fff; 1174 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1175 #ifdef IEEE80211_SUPPORT_MESH 1176 if (vap->iv_opmode == IEEE80211_M_MBSS) 1177 ieee80211_mesh_node_init(vap, ni); 1178 #endif 1179 IEEE80211_NODE_LOCK(nt); 1180 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1181 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1182 ni->ni_table = nt; 1183 ni->ni_vap = vap; 1184 ni->ni_ic = ic; 1185 IEEE80211_NODE_UNLOCK(nt); 1186 1187 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 1188 "%s: inact_reload %u", __func__, ni->ni_inact_reload); 1189 1190 ieee80211_ratectl_node_init(ni); 1191 1192 return ni; 1193 } 1194 1195 /* 1196 * Craft a temporary node suitable for sending a management frame 1197 * to the specified station. We craft only as much state as we 1198 * need to do the work since the node will be immediately reclaimed 1199 * once the send completes. 1200 */ 1201 struct ieee80211_node * 1202 ieee80211_tmp_node(struct ieee80211vap *vap, 1203 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1204 { 1205 struct ieee80211com *ic = vap->iv_ic; 1206 struct ieee80211_node *ni; 1207 1208 ni = ic->ic_node_alloc(vap, macaddr); 1209 if (ni != NULL) { 1210 struct ieee80211_node *bss = vap->iv_bss; 1211 1212 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1213 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1214 1215 ni->ni_table = NULL; /* NB: pedantic */ 1216 ni->ni_ic = ic; /* NB: needed to set channel */ 1217 ni->ni_vap = vap; 1218 1219 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1220 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1221 ieee80211_node_initref(ni); /* mark referenced */ 1222 /* NB: required by ieee80211_fix_rate */ 1223 ieee80211_node_set_chan(ni, bss->ni_chan); 1224 ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1225 IEEE80211_KEYIX_NONE); 1226 ni->ni_txpower = bss->ni_txpower; 1227 /* XXX optimize away */ 1228 ieee80211_psq_init(&ni->ni_psq, "unknown"); 1229 1230 ieee80211_ratectl_node_init(ni); 1231 } else { 1232 /* XXX msg */ 1233 vap->iv_stats.is_rx_nodealloc++; 1234 } 1235 return ni; 1236 } 1237 1238 struct ieee80211_node * 1239 ieee80211_dup_bss(struct ieee80211vap *vap, 1240 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1241 { 1242 struct ieee80211com *ic = vap->iv_ic; 1243 struct ieee80211_node *ni; 1244 1245 ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1246 if (ni != NULL) { 1247 struct ieee80211_node *bss = vap->iv_bss; 1248 /* 1249 * Inherit from iv_bss. 1250 */ 1251 copy_bss(ni, bss); 1252 IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1253 ieee80211_node_set_chan(ni, bss->ni_chan); 1254 } 1255 return ni; 1256 } 1257 1258 /* 1259 * Create a bss node for a legacy WDS vap. The far end does 1260 * not associate so we just create create a new node and 1261 * simulate an association. The caller is responsible for 1262 * installing the node as the bss node and handling any further 1263 * setup work like authorizing the port. 1264 */ 1265 struct ieee80211_node * 1266 ieee80211_node_create_wds(struct ieee80211vap *vap, 1267 const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1268 { 1269 struct ieee80211com *ic = vap->iv_ic; 1270 struct ieee80211_node *ni; 1271 1272 /* XXX check if node already in sta table? */ 1273 ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1274 if (ni != NULL) { 1275 ni->ni_wdsvap = vap; 1276 IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1277 /* 1278 * Inherit any manually configured settings. 1279 */ 1280 copy_bss(ni, vap->iv_bss); 1281 ieee80211_node_set_chan(ni, chan); 1282 /* NB: propagate ssid so available to WPA supplicant */ 1283 ni->ni_esslen = vap->iv_des_ssid[0].len; 1284 memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1285 /* NB: no associd for peer */ 1286 /* 1287 * There are no management frames to use to 1288 * discover neighbor capabilities, so blindly 1289 * propagate the local configuration. 1290 */ 1291 if (vap->iv_flags & IEEE80211_F_WME) 1292 ni->ni_flags |= IEEE80211_NODE_QOS; 1293 #ifdef IEEE80211_SUPPORT_SUPERG 1294 if (vap->iv_flags & IEEE80211_F_FF) 1295 ni->ni_flags |= IEEE80211_NODE_FF; 1296 #endif 1297 if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1298 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1299 /* 1300 * Device is HT-capable and HT is enabled for 1301 * the vap; setup HT operation. On return 1302 * ni_chan will be adjusted to an HT channel. 1303 */ 1304 ieee80211_ht_wds_init(ni); 1305 } else { 1306 struct ieee80211_channel *c = ni->ni_chan; 1307 /* 1308 * Force a legacy channel to be used. 1309 */ 1310 c = ieee80211_find_channel(ic, 1311 c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1312 KASSERT(c != NULL, ("no legacy channel, %u/%x", 1313 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1314 ni->ni_chan = c; 1315 } 1316 } 1317 return ni; 1318 } 1319 1320 struct ieee80211_node * 1321 #ifdef IEEE80211_DEBUG_REFCNT 1322 ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1323 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1324 #else 1325 ieee80211_find_node_locked(struct ieee80211_node_table *nt, 1326 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1327 #endif 1328 { 1329 struct ieee80211_node *ni; 1330 int hash; 1331 1332 IEEE80211_NODE_LOCK_ASSERT(nt); 1333 1334 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1335 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1336 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1337 ieee80211_ref_node(ni); /* mark referenced */ 1338 #ifdef IEEE80211_DEBUG_REFCNT 1339 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1340 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1341 func, line, 1342 ni, ether_sprintf(ni->ni_macaddr), 1343 ieee80211_node_refcnt(ni)); 1344 #endif 1345 return ni; 1346 } 1347 } 1348 return NULL; 1349 } 1350 1351 struct ieee80211_node * 1352 #ifdef IEEE80211_DEBUG_REFCNT 1353 ieee80211_find_node_debug(struct ieee80211_node_table *nt, 1354 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1355 #else 1356 ieee80211_find_node(struct ieee80211_node_table *nt, 1357 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1358 #endif 1359 { 1360 struct ieee80211_node *ni; 1361 1362 IEEE80211_NODE_LOCK(nt); 1363 ni = ieee80211_find_node_locked(nt, macaddr); 1364 IEEE80211_NODE_UNLOCK(nt); 1365 return ni; 1366 } 1367 1368 struct ieee80211_node * 1369 #ifdef IEEE80211_DEBUG_REFCNT 1370 ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1371 const struct ieee80211vap *vap, 1372 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1373 #else 1374 ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1375 const struct ieee80211vap *vap, 1376 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1377 #endif 1378 { 1379 struct ieee80211_node *ni; 1380 int hash; 1381 1382 IEEE80211_NODE_LOCK_ASSERT(nt); 1383 1384 hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); 1385 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1386 if (ni->ni_vap == vap && 1387 IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1388 ieee80211_ref_node(ni); /* mark referenced */ 1389 #ifdef IEEE80211_DEBUG_REFCNT 1390 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1391 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1392 func, line, 1393 ni, ether_sprintf(ni->ni_macaddr), 1394 ieee80211_node_refcnt(ni)); 1395 #endif 1396 return ni; 1397 } 1398 } 1399 return NULL; 1400 } 1401 1402 struct ieee80211_node * 1403 #ifdef IEEE80211_DEBUG_REFCNT 1404 ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1405 const struct ieee80211vap *vap, 1406 const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1407 #else 1408 ieee80211_find_vap_node(struct ieee80211_node_table *nt, 1409 const struct ieee80211vap *vap, 1410 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1411 #endif 1412 { 1413 struct ieee80211_node *ni; 1414 1415 IEEE80211_NODE_LOCK(nt); 1416 ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1417 IEEE80211_NODE_UNLOCK(nt); 1418 return ni; 1419 } 1420 1421 /* 1422 * Fake up a node; this handles node discovery in adhoc mode. 1423 * Note that for the driver's benefit we we treat this like 1424 * an association so the driver has an opportunity to setup 1425 * it's private state. 1426 */ 1427 struct ieee80211_node * 1428 ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1429 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1430 { 1431 struct ieee80211_node *ni; 1432 1433 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, 1434 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1435 ni = ieee80211_dup_bss(vap, macaddr); 1436 if (ni != NULL) { 1437 struct ieee80211com *ic = vap->iv_ic; 1438 1439 /* XXX no rate negotiation; just dup */ 1440 ni->ni_rates = vap->iv_bss->ni_rates; 1441 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1442 ni->ni_flags |= IEEE80211_NODE_ERP; 1443 if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1444 /* 1445 * In adhoc demo mode there are no management 1446 * frames to use to discover neighbor capabilities, 1447 * so blindly propagate the local configuration 1448 * so we can do interesting things (e.g. use 1449 * WME to disable ACK's). 1450 */ 1451 if (vap->iv_flags & IEEE80211_F_WME) 1452 ni->ni_flags |= IEEE80211_NODE_QOS; 1453 #ifdef IEEE80211_SUPPORT_SUPERG 1454 if (vap->iv_flags & IEEE80211_F_FF) 1455 ni->ni_flags |= IEEE80211_NODE_FF; 1456 #endif 1457 } 1458 ieee80211_node_setuptxparms(ni); 1459 ieee80211_ratectl_node_init(ni); 1460 if (ic->ic_newassoc != NULL) 1461 ic->ic_newassoc(ni, 1); 1462 /* XXX not right for 802.1x/WPA */ 1463 ieee80211_node_authorize(ni); 1464 } 1465 return ni; 1466 } 1467 1468 void 1469 ieee80211_init_neighbor(struct ieee80211_node *ni, 1470 const struct ieee80211_frame *wh, 1471 const struct ieee80211_scanparams *sp) 1472 { 1473 int do_ht_setup = 0; 1474 1475 ni->ni_esslen = sp->ssid[1]; 1476 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1477 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1478 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1479 ni->ni_intval = sp->bintval; 1480 ni->ni_capinfo = sp->capinfo; 1481 ni->ni_chan = ni->ni_ic->ic_curchan; 1482 ni->ni_fhdwell = sp->fhdwell; 1483 ni->ni_fhindex = sp->fhindex; 1484 ni->ni_erp = sp->erp; 1485 ni->ni_timoff = sp->timoff; 1486 #ifdef IEEE80211_SUPPORT_MESH 1487 if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) 1488 ieee80211_mesh_init_neighbor(ni, wh, sp); 1489 #endif 1490 if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1491 ieee80211_ies_expand(&ni->ni_ies); 1492 if (ni->ni_ies.wme_ie != NULL) 1493 ni->ni_flags |= IEEE80211_NODE_QOS; 1494 else 1495 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1496 #ifdef IEEE80211_SUPPORT_SUPERG 1497 if (ni->ni_ies.ath_ie != NULL) 1498 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1499 #endif 1500 if (ni->ni_ies.htcap_ie != NULL) 1501 ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 1502 if (ni->ni_ies.htinfo_ie != NULL) 1503 ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 1504 1505 if ((ni->ni_ies.htcap_ie != NULL) && 1506 (ni->ni_ies.htinfo_ie != NULL) && 1507 (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1508 do_ht_setup = 1; 1509 } 1510 } 1511 1512 /* NB: must be after ni_chan is setup */ 1513 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1514 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1515 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1516 1517 /* 1518 * If the neighbor is HT compatible, flip that on. 1519 */ 1520 if (do_ht_setup) { 1521 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 1522 "%s: doing HT setup\n", __func__); 1523 ieee80211_ht_node_init(ni); 1524 ieee80211_ht_updateparams(ni, 1525 ni->ni_ies.htcap_ie, 1526 ni->ni_ies.htinfo_ie); 1527 ieee80211_setup_htrates(ni, 1528 ni->ni_ies.htcap_ie, 1529 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1530 ieee80211_setup_basic_htrates(ni, 1531 ni->ni_ies.htinfo_ie); 1532 ieee80211_node_setuptxparms(ni); 1533 ieee80211_ratectl_node_init(ni); 1534 } 1535 } 1536 1537 /* 1538 * Do node discovery in adhoc mode on receipt of a beacon 1539 * or probe response frame. Note that for the driver's 1540 * benefit we we treat this like an association so the 1541 * driver has an opportunity to setup it's private state. 1542 */ 1543 struct ieee80211_node * 1544 ieee80211_add_neighbor(struct ieee80211vap *vap, 1545 const struct ieee80211_frame *wh, 1546 const struct ieee80211_scanparams *sp) 1547 { 1548 struct ieee80211_node *ni; 1549 1550 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 1551 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1552 ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1553 if (ni != NULL) { 1554 struct ieee80211com *ic = vap->iv_ic; 1555 1556 ieee80211_init_neighbor(ni, wh, sp); 1557 if (ieee80211_iserp_rateset(&ni->ni_rates)) 1558 ni->ni_flags |= IEEE80211_NODE_ERP; 1559 ieee80211_node_setuptxparms(ni); 1560 ieee80211_ratectl_node_init(ni); 1561 if (ic->ic_newassoc != NULL) 1562 ic->ic_newassoc(ni, 1); 1563 /* XXX not right for 802.1x/WPA */ 1564 ieee80211_node_authorize(ni); 1565 } 1566 return ni; 1567 } 1568 1569 #define IS_PROBEREQ(wh) \ 1570 ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1571 == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1572 #define IS_BCAST_PROBEREQ(wh) \ 1573 (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1574 ((const struct ieee80211_frame *)(wh))->i_addr3)) 1575 1576 static __inline struct ieee80211_node * 1577 _find_rxnode(struct ieee80211_node_table *nt, 1578 const struct ieee80211_frame_min *wh) 1579 { 1580 if (IS_BCAST_PROBEREQ(wh)) 1581 return NULL; /* spam bcast probe req to all vap's */ 1582 return ieee80211_find_node_locked(nt, wh->i_addr2); 1583 } 1584 1585 /* 1586 * Locate the node for sender, track state, and then pass the 1587 * (referenced) node up to the 802.11 layer for its use. Note 1588 * we can return NULL if the sender is not in the table. 1589 */ 1590 struct ieee80211_node * 1591 #ifdef IEEE80211_DEBUG_REFCNT 1592 ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1593 const struct ieee80211_frame_min *wh, const char *func, int line) 1594 #else 1595 ieee80211_find_rxnode(struct ieee80211com *ic, 1596 const struct ieee80211_frame_min *wh) 1597 #endif 1598 { 1599 struct ieee80211_node_table *nt; 1600 struct ieee80211_node *ni; 1601 1602 nt = &ic->ic_sta; 1603 IEEE80211_NODE_LOCK(nt); 1604 ni = _find_rxnode(nt, wh); 1605 IEEE80211_NODE_UNLOCK(nt); 1606 1607 return ni; 1608 } 1609 1610 /* 1611 * Like ieee80211_find_rxnode but use the supplied h/w 1612 * key index as a hint to locate the node in the key 1613 * mapping table. If an entry is present at the key 1614 * index we return it; otherwise do a normal lookup and 1615 * update the mapping table if the station has a unicast 1616 * key assigned to it. 1617 */ 1618 struct ieee80211_node * 1619 #ifdef IEEE80211_DEBUG_REFCNT 1620 ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1621 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1622 const char *func, int line) 1623 #else 1624 ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1625 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1626 #endif 1627 { 1628 struct ieee80211_node_table *nt; 1629 struct ieee80211_node *ni; 1630 1631 nt = &ic->ic_sta; 1632 IEEE80211_NODE_LOCK(nt); 1633 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1634 ni = nt->nt_keyixmap[keyix]; 1635 else 1636 ni = NULL; 1637 if (ni == NULL) { 1638 ni = _find_rxnode(nt, wh); 1639 if (ni != NULL && nt->nt_keyixmap != NULL) { 1640 /* 1641 * If the station has a unicast key cache slot 1642 * assigned update the key->node mapping table. 1643 */ 1644 keyix = ni->ni_ucastkey.wk_rxkeyix; 1645 /* XXX can keyixmap[keyix] != NULL? */ 1646 if (keyix < nt->nt_keyixmax && 1647 nt->nt_keyixmap[keyix] == NULL) { 1648 IEEE80211_DPRINTF(ni->ni_vap, 1649 IEEE80211_MSG_NODE, 1650 "%s: add key map entry %p<%s> refcnt %d\n", 1651 __func__, ni, ether_sprintf(ni->ni_macaddr), 1652 ieee80211_node_refcnt(ni)+1); 1653 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1654 } 1655 } 1656 } else { 1657 if (IS_BCAST_PROBEREQ(wh)) 1658 ni = NULL; /* spam bcast probe req to all vap's */ 1659 else 1660 ieee80211_ref_node(ni); 1661 } 1662 IEEE80211_NODE_UNLOCK(nt); 1663 1664 return ni; 1665 } 1666 #undef IS_BCAST_PROBEREQ 1667 #undef IS_PROBEREQ 1668 1669 /* 1670 * Return a reference to the appropriate node for sending 1671 * a data frame. This handles node discovery in adhoc networks. 1672 */ 1673 struct ieee80211_node * 1674 #ifdef IEEE80211_DEBUG_REFCNT 1675 ieee80211_find_txnode_debug(struct ieee80211vap *vap, 1676 const uint8_t macaddr[IEEE80211_ADDR_LEN], 1677 const char *func, int line) 1678 #else 1679 ieee80211_find_txnode(struct ieee80211vap *vap, 1680 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1681 #endif 1682 { 1683 struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1684 struct ieee80211_node *ni; 1685 1686 /* 1687 * The destination address should be in the node table 1688 * unless this is a multicast/broadcast frame. We can 1689 * also optimize station mode operation, all frames go 1690 * to the bss node. 1691 */ 1692 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1693 IEEE80211_NODE_LOCK(nt); 1694 if (vap->iv_opmode == IEEE80211_M_STA || 1695 vap->iv_opmode == IEEE80211_M_WDS || 1696 IEEE80211_IS_MULTICAST(macaddr)) 1697 ni = ieee80211_ref_node(vap->iv_bss); 1698 else 1699 ni = ieee80211_find_node_locked(nt, macaddr); 1700 IEEE80211_NODE_UNLOCK(nt); 1701 1702 if (ni == NULL) { 1703 if (vap->iv_opmode == IEEE80211_M_IBSS || 1704 vap->iv_opmode == IEEE80211_M_AHDEMO) { 1705 /* 1706 * In adhoc mode cons up a node for the destination. 1707 * Note that we need an additional reference for the 1708 * caller to be consistent with 1709 * ieee80211_find_node_locked. 1710 */ 1711 ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1712 if (ni != NULL) 1713 (void) ieee80211_ref_node(ni); 1714 } else { 1715 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1716 "no node, discard frame (%s)", __func__); 1717 vap->iv_stats.is_tx_nonode++; 1718 } 1719 } 1720 return ni; 1721 } 1722 1723 static void 1724 _ieee80211_free_node(struct ieee80211_node *ni) 1725 { 1726 struct ieee80211_node_table *nt = ni->ni_table; 1727 1728 /* 1729 * NB: careful about referencing the vap as it may be 1730 * gone if the last reference was held by a driver. 1731 * We know the com will always be present so it's safe 1732 * to use ni_ic below to reclaim resources. 1733 */ 1734 #if 0 1735 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1736 "%s %p<%s> in %s table\n", __func__, ni, 1737 ether_sprintf(ni->ni_macaddr), 1738 nt != NULL ? nt->nt_name : "<gone>"); 1739 #endif 1740 if (ni->ni_associd != 0) { 1741 struct ieee80211vap *vap = ni->ni_vap; 1742 if (vap->iv_aid_bitmap != NULL) 1743 IEEE80211_AID_CLR(vap, ni->ni_associd); 1744 } 1745 if (nt != NULL) { 1746 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1747 LIST_REMOVE(ni, ni_hash); 1748 } 1749 ni->ni_ic->ic_node_free(ni); 1750 } 1751 1752 void 1753 #ifdef IEEE80211_DEBUG_REFCNT 1754 ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1755 #else 1756 ieee80211_free_node(struct ieee80211_node *ni) 1757 #endif 1758 { 1759 struct ieee80211_node_table *nt = ni->ni_table; 1760 1761 #ifdef IEEE80211_DEBUG_REFCNT 1762 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1763 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1764 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1765 #endif 1766 if (nt != NULL) { 1767 IEEE80211_NODE_LOCK(nt); 1768 if (ieee80211_node_dectestref(ni)) { 1769 /* 1770 * Last reference, reclaim state. 1771 */ 1772 _ieee80211_free_node(ni); 1773 } else if (ieee80211_node_refcnt(ni) == 1 && 1774 nt->nt_keyixmap != NULL) { 1775 ieee80211_keyix keyix; 1776 /* 1777 * Check for a last reference in the key mapping table. 1778 */ 1779 keyix = ni->ni_ucastkey.wk_rxkeyix; 1780 if (keyix < nt->nt_keyixmax && 1781 nt->nt_keyixmap[keyix] == ni) { 1782 IEEE80211_DPRINTF(ni->ni_vap, 1783 IEEE80211_MSG_NODE, 1784 "%s: %p<%s> clear key map entry", __func__, 1785 ni, ether_sprintf(ni->ni_macaddr)); 1786 nt->nt_keyixmap[keyix] = NULL; 1787 ieee80211_node_decref(ni); /* XXX needed? */ 1788 _ieee80211_free_node(ni); 1789 } 1790 } 1791 IEEE80211_NODE_UNLOCK(nt); 1792 } else { 1793 if (ieee80211_node_dectestref(ni)) 1794 _ieee80211_free_node(ni); 1795 } 1796 } 1797 1798 /* 1799 * Reclaim a unicast key and clear any key cache state. 1800 */ 1801 int 1802 ieee80211_node_delucastkey(struct ieee80211_node *ni) 1803 { 1804 struct ieee80211com *ic = ni->ni_ic; 1805 struct ieee80211_node_table *nt = &ic->ic_sta; 1806 struct ieee80211_node *nikey; 1807 ieee80211_keyix keyix; 1808 int isowned, status; 1809 1810 /* 1811 * NB: We must beware of LOR here; deleting the key 1812 * can cause the crypto layer to block traffic updates 1813 * which can generate a LOR against the node table lock; 1814 * grab it here and stash the key index for our use below. 1815 * 1816 * Must also beware of recursion on the node table lock. 1817 * When called from node_cleanup we may already have 1818 * the node table lock held. Unfortunately there's no 1819 * way to separate out this path so we must do this 1820 * conditionally. 1821 */ 1822 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1823 if (!isowned) 1824 IEEE80211_NODE_LOCK(nt); 1825 nikey = NULL; 1826 status = 1; /* NB: success */ 1827 if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { 1828 keyix = ni->ni_ucastkey.wk_rxkeyix; 1829 status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1830 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1831 nikey = nt->nt_keyixmap[keyix]; 1832 nt->nt_keyixmap[keyix] = NULL; 1833 } 1834 } 1835 if (!isowned) 1836 IEEE80211_NODE_UNLOCK(nt); 1837 1838 if (nikey != NULL) { 1839 KASSERT(nikey == ni, 1840 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1841 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1842 "%s: delete key map entry %p<%s> refcnt %d\n", 1843 __func__, ni, ether_sprintf(ni->ni_macaddr), 1844 ieee80211_node_refcnt(ni)-1); 1845 ieee80211_free_node(ni); 1846 } 1847 return status; 1848 } 1849 1850 /* 1851 * Reclaim a node. If this is the last reference count then 1852 * do the normal free work. Otherwise remove it from the node 1853 * table and mark it gone by clearing the back-reference. 1854 */ 1855 static void 1856 node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1857 { 1858 ieee80211_keyix keyix; 1859 1860 IEEE80211_NODE_LOCK_ASSERT(nt); 1861 1862 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1863 "%s: remove %p<%s> from %s table, refcnt %d\n", 1864 __func__, ni, ether_sprintf(ni->ni_macaddr), 1865 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1866 /* 1867 * Clear any entry in the unicast key mapping table. 1868 * We need to do it here so rx lookups don't find it 1869 * in the mapping table even if it's not in the hash 1870 * table. We cannot depend on the mapping table entry 1871 * being cleared because the node may not be free'd. 1872 */ 1873 keyix = ni->ni_ucastkey.wk_rxkeyix; 1874 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1875 nt->nt_keyixmap[keyix] == ni) { 1876 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1877 "%s: %p<%s> clear key map entry %u\n", 1878 __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); 1879 nt->nt_keyixmap[keyix] = NULL; 1880 ieee80211_node_decref(ni); /* NB: don't need free */ 1881 } 1882 if (!ieee80211_node_dectestref(ni)) { 1883 /* 1884 * Other references are present, just remove the 1885 * node from the table so it cannot be found. When 1886 * the references are dropped storage will be 1887 * reclaimed. 1888 */ 1889 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1890 LIST_REMOVE(ni, ni_hash); 1891 ni->ni_table = NULL; /* clear reference */ 1892 } else 1893 _ieee80211_free_node(ni); 1894 } 1895 1896 /* 1897 * Node table support. 1898 */ 1899 1900 static void 1901 ieee80211_node_table_init(struct ieee80211com *ic, 1902 struct ieee80211_node_table *nt, 1903 const char *name, int inact, int keyixmax) 1904 { 1905 struct ifnet *ifp = ic->ic_ifp; 1906 1907 nt->nt_ic = ic; 1908 IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1909 IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1910 TAILQ_INIT(&nt->nt_node); 1911 nt->nt_name = name; 1912 nt->nt_scangen = 1; 1913 nt->nt_inact_init = inact; 1914 nt->nt_keyixmax = keyixmax; 1915 if (nt->nt_keyixmax > 0) { 1916 nt->nt_keyixmap = (struct ieee80211_node **) kmalloc( 1917 keyixmax * sizeof(struct ieee80211_node *), 1918 M_80211_NODE, M_INTWAIT | M_ZERO); 1919 if (nt->nt_keyixmap == NULL) 1920 if_printf(ic->ic_ifp, 1921 "Cannot allocate key index map with %u entries\n", 1922 keyixmax); 1923 } else 1924 nt->nt_keyixmap = NULL; 1925 } 1926 1927 static void 1928 ieee80211_node_table_reset(struct ieee80211_node_table *nt, 1929 struct ieee80211vap *match) 1930 { 1931 struct ieee80211_node *ni, *next; 1932 1933 IEEE80211_NODE_LOCK(nt); 1934 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1935 if (match != NULL && ni->ni_vap != match) 1936 continue; 1937 /* XXX can this happen? if so need's work */ 1938 if (ni->ni_associd != 0) { 1939 struct ieee80211vap *vap = ni->ni_vap; 1940 1941 if (vap->iv_auth->ia_node_leave != NULL) 1942 vap->iv_auth->ia_node_leave(ni); 1943 if (vap->iv_aid_bitmap != NULL) 1944 IEEE80211_AID_CLR(vap, ni->ni_associd); 1945 } 1946 ni->ni_wdsvap = NULL; /* clear reference */ 1947 node_reclaim(nt, ni); 1948 } 1949 if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1950 /* 1951 * Make a separate pass to clear references to this vap 1952 * held by DWDS entries. They will not be matched above 1953 * because ni_vap will point to the ap vap but we still 1954 * need to clear ni_wdsvap when the WDS vap is destroyed 1955 * and/or reset. 1956 */ 1957 TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1958 if (ni->ni_wdsvap == match) 1959 ni->ni_wdsvap = NULL; 1960 } 1961 IEEE80211_NODE_UNLOCK(nt); 1962 } 1963 1964 static void 1965 ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1966 { 1967 ieee80211_node_table_reset(nt, NULL); 1968 if (nt->nt_keyixmap != NULL) { 1969 #ifdef DIAGNOSTIC 1970 /* XXX verify all entries are NULL */ 1971 int i; 1972 for (i = 0; i < nt->nt_keyixmax; i++) 1973 if (nt->nt_keyixmap[i] != NULL) 1974 kprintf("%s: %s[%u] still active\n", __func__, 1975 nt->nt_name, i); 1976 #endif 1977 kfree(nt->nt_keyixmap, M_80211_NODE); 1978 nt->nt_keyixmap = NULL; 1979 } 1980 IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1981 IEEE80211_NODE_LOCK_DESTROY(nt); 1982 } 1983 1984 /* 1985 * Timeout inactive stations and do related housekeeping. 1986 * Note that we cannot hold the node lock while sending a 1987 * frame as this would lead to a LOR. Instead we use a 1988 * generation number to mark nodes that we've scanned and 1989 * drop the lock and restart a scan if we have to time out 1990 * a node. Since we are single-threaded by virtue of 1991 * controlling the inactivity timer we can be sure this will 1992 * process each node only once. 1993 */ 1994 static void 1995 ieee80211_timeout_stations(struct ieee80211com *ic) 1996 { 1997 struct ieee80211_node_table *nt = &ic->ic_sta; 1998 struct ieee80211vap *vap; 1999 struct ieee80211_node *ni; 2000 int gen = 0; 2001 2002 IEEE80211_NODE_ITERATE_LOCK(nt); 2003 gen = ++nt->nt_scangen; 2004 restart: 2005 IEEE80211_NODE_LOCK(nt); 2006 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2007 if (ni->ni_scangen == gen) /* previously handled */ 2008 continue; 2009 ni->ni_scangen = gen; 2010 /* 2011 * Ignore entries for which have yet to receive an 2012 * authentication frame. These are transient and 2013 * will be reclaimed when the last reference to them 2014 * goes away (when frame xmits complete). 2015 */ 2016 vap = ni->ni_vap; 2017 /* 2018 * Only process stations when in RUN state. This 2019 * insures, for example, that we don't timeout an 2020 * inactive station during CAC. Note that CSA state 2021 * is actually handled in ieee80211_node_timeout as 2022 * it applies to more than timeout processing. 2023 */ 2024 if (vap->iv_state != IEEE80211_S_RUN) 2025 continue; 2026 /* XXX can vap be NULL? */ 2027 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2028 vap->iv_opmode == IEEE80211_M_STA) && 2029 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2030 continue; 2031 /* 2032 * Free fragment if not needed anymore 2033 * (last fragment older than 1s). 2034 * XXX doesn't belong here, move to node_age 2035 */ 2036 if (ni->ni_rxfrag[0] != NULL && 2037 ticks > ni->ni_rxfragstamp + hz) { 2038 m_freem(ni->ni_rxfrag[0]); 2039 ni->ni_rxfrag[0] = NULL; 2040 } 2041 if (ni->ni_inact > 0) { 2042 ni->ni_inact--; 2043 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 2044 "%s: inact %u inact_reload %u nrates %u", 2045 __func__, ni->ni_inact, ni->ni_inact_reload, 2046 ni->ni_rates.rs_nrates); 2047 } 2048 /* 2049 * Special case ourself; we may be idle for extended periods 2050 * of time and regardless reclaiming our state is wrong. 2051 * XXX run ic_node_age 2052 */ 2053 if (ni == vap->iv_bss) 2054 continue; 2055 if (ni->ni_associd != 0 || 2056 (vap->iv_opmode == IEEE80211_M_IBSS || 2057 vap->iv_opmode == IEEE80211_M_AHDEMO)) { 2058 /* 2059 * Age/drain resources held by the station. 2060 */ 2061 ic->ic_node_age(ni); 2062 /* 2063 * Probe the station before time it out. We 2064 * send a null data frame which may not be 2065 * universally supported by drivers (need it 2066 * for ps-poll support so it should be...). 2067 * 2068 * XXX don't probe the station unless we've 2069 * received a frame from them (and have 2070 * some idea of the rates they are capable 2071 * of); this will get fixed more properly 2072 * soon with better handling of the rate set. 2073 */ 2074 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2075 (0 < ni->ni_inact && 2076 ni->ni_inact <= vap->iv_inact_probe) && 2077 ni->ni_rates.rs_nrates != 0) { 2078 IEEE80211_NOTE(vap, 2079 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 2080 ni, "%s", 2081 "probe station due to inactivity"); 2082 /* 2083 * Grab a reference before unlocking the table 2084 * so the node cannot be reclaimed before we 2085 * send the frame. ieee80211_send_nulldata 2086 * understands we've done this and reclaims the 2087 * ref for us as needed. 2088 */ 2089 ieee80211_ref_node(ni); 2090 IEEE80211_NODE_UNLOCK(nt); 2091 ieee80211_send_nulldata(ni); 2092 /* XXX stat? */ 2093 goto restart; 2094 } 2095 } 2096 if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 2097 ni->ni_inact <= 0) { 2098 IEEE80211_NOTE(vap, 2099 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 2100 "station timed out due to inactivity " 2101 "(refcnt %u)", ieee80211_node_refcnt(ni)); 2102 /* 2103 * Send a deauthenticate frame and drop the station. 2104 * This is somewhat complicated due to reference counts 2105 * and locking. At this point a station will typically 2106 * have a reference count of 1. ieee80211_node_leave 2107 * will do a "free" of the node which will drop the 2108 * reference count. But in the meantime a reference 2109 * wil be held by the deauth frame. The actual reclaim 2110 * of the node will happen either after the tx is 2111 * completed or by ieee80211_node_leave. 2112 * 2113 * Separately we must drop the node lock before sending 2114 * in case the driver takes a lock, as this can result 2115 * in a LOR between the node lock and the driver lock. 2116 */ 2117 ieee80211_ref_node(ni); 2118 IEEE80211_NODE_UNLOCK(nt); 2119 if (ni->ni_associd != 0) { 2120 IEEE80211_SEND_MGMT(ni, 2121 IEEE80211_FC0_SUBTYPE_DEAUTH, 2122 IEEE80211_REASON_AUTH_EXPIRE); 2123 } 2124 ieee80211_node_leave(ni); 2125 ieee80211_free_node(ni); 2126 vap->iv_stats.is_node_timeout++; 2127 goto restart; 2128 } 2129 } 2130 IEEE80211_NODE_UNLOCK(nt); 2131 2132 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2133 } 2134 2135 /* 2136 * Aggressively reclaim resources. This should be used 2137 * only in a critical situation to reclaim mbuf resources. 2138 */ 2139 void 2140 ieee80211_drain(struct ieee80211com *ic) 2141 { 2142 struct ieee80211_node_table *nt = &ic->ic_sta; 2143 struct ieee80211vap *vap; 2144 struct ieee80211_node *ni; 2145 2146 IEEE80211_NODE_LOCK(nt); 2147 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2148 /* 2149 * Ignore entries for which have yet to receive an 2150 * authentication frame. These are transient and 2151 * will be reclaimed when the last reference to them 2152 * goes away (when frame xmits complete). 2153 */ 2154 vap = ni->ni_vap; 2155 /* 2156 * Only process stations when in RUN state. This 2157 * insures, for example, that we don't timeout an 2158 * inactive station during CAC. Note that CSA state 2159 * is actually handled in ieee80211_node_timeout as 2160 * it applies to more than timeout processing. 2161 */ 2162 if (vap->iv_state != IEEE80211_S_RUN) 2163 continue; 2164 /* XXX can vap be NULL? */ 2165 if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2166 vap->iv_opmode == IEEE80211_M_STA) && 2167 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2168 continue; 2169 /* 2170 * Free fragments. 2171 * XXX doesn't belong here, move to node_drain 2172 */ 2173 if (ni->ni_rxfrag[0] != NULL) { 2174 m_freem(ni->ni_rxfrag[0]); 2175 ni->ni_rxfrag[0] = NULL; 2176 } 2177 /* 2178 * Drain resources held by the station. 2179 */ 2180 ic->ic_node_drain(ni); 2181 } 2182 IEEE80211_NODE_UNLOCK(nt); 2183 } 2184 2185 /* 2186 * Per-ieee80211com inactivity timer callback. 2187 */ 2188 void 2189 ieee80211_node_timeout(void *arg) 2190 { 2191 struct ieee80211com *ic = arg; 2192 2193 /* 2194 * Defer timeout processing if a channel switch is pending. 2195 * We typically need to be mute so not doing things that 2196 * might generate frames is good to handle in one place. 2197 * Supressing the station timeout processing may extend the 2198 * lifetime of inactive stations (by not decrementing their 2199 * idle counters) but this should be ok unless the CSA is 2200 * active for an unusually long time. 2201 */ 2202 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2203 ieee80211_scan_timeout(ic); 2204 ieee80211_timeout_stations(ic); 2205 ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); 2206 2207 IEEE80211_LOCK(ic); 2208 ieee80211_erp_timeout(ic); 2209 ieee80211_ht_timeout(ic); 2210 IEEE80211_UNLOCK(ic); 2211 } 2212 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2213 ieee80211_node_timeout, ic); 2214 } 2215 2216 /* 2217 * Iterate over the node table and return an array of ref'ed nodes. 2218 * 2219 * This is separated out from calling the actual node function so that 2220 * no LORs will occur. 2221 * 2222 * If there are too many nodes (ie, the number of nodes doesn't fit 2223 * within 'max_aid' entries) then the node references will be freed 2224 * and an error will be returned. 2225 * 2226 * The responsibility of allocating and freeing "ni_arr" is up to 2227 * the caller. 2228 */ 2229 int 2230 ieee80211_iterate_nt(struct ieee80211_node_table *nt, 2231 struct ieee80211_node **ni_arr, uint16_t max_aid) 2232 { 2233 u_int gen; 2234 int i, j, ret; 2235 struct ieee80211_node *ni; 2236 2237 IEEE80211_NODE_ITERATE_LOCK(nt); 2238 IEEE80211_NODE_LOCK(nt); 2239 2240 gen = ++nt->nt_scangen; 2241 i = ret = 0; 2242 2243 /* 2244 * We simply assume here that since the node 2245 * scan generation doesn't change (as 2246 * we are holding both the node table and 2247 * node table iteration locks), we can simply 2248 * assign it to the node here. 2249 */ 2250 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2251 if (i >= max_aid) { 2252 ret = E2BIG; 2253 if_printf(nt->nt_ic->ic_ifp, 2254 "Node array overflow: max=%u", max_aid); 2255 break; 2256 } 2257 ni_arr[i] = ieee80211_ref_node(ni); 2258 ni_arr[i]->ni_scangen = gen; 2259 i++; 2260 } 2261 2262 /* 2263 * It's safe to unlock here. 2264 * 2265 * If we're successful, the list is returned. 2266 * If we're unsuccessful, the list is ignored 2267 * and we remove our references. 2268 * 2269 * This avoids any potential LOR with 2270 * ieee80211_free_node(). 2271 */ 2272 IEEE80211_NODE_UNLOCK(nt); 2273 IEEE80211_NODE_ITERATE_UNLOCK(nt); 2274 2275 /* 2276 * If ret is non-zero, we hit some kind of error. 2277 * Rather than walking some nodes, we'll walk none 2278 * of them. 2279 */ 2280 if (ret) { 2281 for (j = 0; j < i; j++) { 2282 /* ieee80211_free_node() locks by itself */ 2283 ieee80211_free_node(ni_arr[j]); 2284 } 2285 } 2286 2287 return (ret); 2288 } 2289 2290 /* 2291 * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() 2292 * reference in the source. 2293 * 2294 * Note that this fetches 'max_aid' from the first VAP, rather than finding 2295 * the largest max_aid from all VAPs. 2296 */ 2297 void 2298 ieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2299 ieee80211_iter_func *f, void *arg) 2300 { 2301 struct ieee80211_node **ni_arr; 2302 size_t size; 2303 int i; 2304 uint16_t max_aid; 2305 struct ieee80211vap *vap; 2306 2307 /* Overdoing it default */ 2308 max_aid = IEEE80211_AID_MAX; 2309 2310 /* Handle the case of there being no vaps just yet */ 2311 vap = TAILQ_FIRST(&nt->nt_ic->ic_vaps); 2312 if (vap != NULL) 2313 max_aid = vap->iv_max_aid; 2314 2315 size = max_aid * sizeof(struct ieee80211_node *); 2316 ni_arr = (struct ieee80211_node **) kmalloc(size, M_80211_NODE, 2317 M_INTWAIT | M_ZERO); 2318 if (ni_arr == NULL) 2319 return; 2320 2321 /* 2322 * If this fails, the node table won't have any 2323 * valid entries - ieee80211_iterate_nt() frees 2324 * the references to them. So don't try walking 2325 * the table; just skip to the end and free the 2326 * temporary memory. 2327 */ 2328 if (ieee80211_iterate_nt(nt, ni_arr, max_aid) != 0) 2329 goto done; 2330 2331 for (i = 0; i < max_aid; i++) { 2332 if (ni_arr[i] == NULL) /* end of the list */ 2333 break; 2334 (*f)(arg, ni_arr[i]); 2335 /* ieee80211_free_node() locks by itself */ 2336 ieee80211_free_node(ni_arr[i]); 2337 } 2338 2339 done: 2340 kfree(ni_arr, M_80211_NODE); 2341 } 2342 2343 void 2344 ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2345 { 2346 kprintf("0x%p: mac %s refcnt %d\n", ni, 2347 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2348 kprintf("\tscangen %u authmode %u flags 0x%x\n", 2349 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2350 kprintf("\tassocid 0x%x txpower %u vlan %u\n", 2351 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2352 kprintf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2353 ni->ni_txseqs[IEEE80211_NONQOS_TID], 2354 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2355 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2356 ni->ni_rxfragstamp); 2357 kprintf("\trssi %d noise %d intval %u capinfo 0x%x\n", 2358 node_getrssi(ni), ni->ni_noise, 2359 ni->ni_intval, ni->ni_capinfo); 2360 kprintf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2361 ether_sprintf(ni->ni_bssid), 2362 ni->ni_esslen, ni->ni_essid, 2363 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2364 kprintf("\tinact %u inact_reload %u txrate %u\n", 2365 ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); 2366 kprintf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2367 ni->ni_htcap, ni->ni_htparam, 2368 ni->ni_htctlchan, ni->ni_ht2ndchan); 2369 kprintf("\thtopmode %x htstbc %x chw %u\n", 2370 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2371 } 2372 2373 void 2374 ieee80211_dump_nodes(struct ieee80211_node_table *nt) 2375 { 2376 ieee80211_iterate_nodes(nt, 2377 (ieee80211_iter_func *) ieee80211_dump_node, nt); 2378 } 2379 2380 static void 2381 ieee80211_notify_erp_locked(struct ieee80211com *ic) 2382 { 2383 struct ieee80211vap *vap; 2384 2385 IEEE80211_LOCK_ASSERT(ic); 2386 2387 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2388 if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2389 ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2390 } 2391 2392 void 2393 ieee80211_notify_erp(struct ieee80211com *ic) 2394 { 2395 IEEE80211_LOCK(ic); 2396 ieee80211_notify_erp_locked(ic); 2397 IEEE80211_UNLOCK(ic); 2398 } 2399 2400 /* 2401 * Handle a station joining an 11g network. 2402 */ 2403 static void 2404 ieee80211_node_join_11g(struct ieee80211_node *ni) 2405 { 2406 struct ieee80211com *ic = ni->ni_ic; 2407 2408 IEEE80211_LOCK_ASSERT(ic); 2409 2410 /* 2411 * Station isn't capable of short slot time. Bump 2412 * the count of long slot time stations and disable 2413 * use of short slot time. Note that the actual switch 2414 * over to long slot time use may not occur until the 2415 * next beacon transmission (per sec. 7.3.1.4 of 11g). 2416 */ 2417 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2418 ic->ic_longslotsta++; 2419 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2420 "station needs long slot time, count %d", 2421 ic->ic_longslotsta); 2422 /* XXX vap's w/ conflicting needs won't work */ 2423 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2424 /* 2425 * Don't force slot time when switched to turbo 2426 * mode as non-ERP stations won't be present; this 2427 * need only be done when on the normal G channel. 2428 */ 2429 ieee80211_set_shortslottime(ic, 0); 2430 } 2431 } 2432 /* 2433 * If the new station is not an ERP station 2434 * then bump the counter and enable protection 2435 * if configured. 2436 */ 2437 if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2438 ic->ic_nonerpsta++; 2439 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2440 "station is !ERP, %d non-ERP stations associated", 2441 ic->ic_nonerpsta); 2442 /* 2443 * If station does not support short preamble 2444 * then we must enable use of Barker preamble. 2445 */ 2446 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2447 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2448 "%s", "station needs long preamble"); 2449 ic->ic_flags |= IEEE80211_F_USEBARKER; 2450 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2451 } 2452 /* 2453 * If protection is configured and this is the first 2454 * indication we should use protection, enable it. 2455 */ 2456 if (ic->ic_protmode != IEEE80211_PROT_NONE && 2457 ic->ic_nonerpsta == 1 && 2458 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2459 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2460 "%s: enable use of protection\n", __func__); 2461 ic->ic_flags |= IEEE80211_F_USEPROT; 2462 ieee80211_notify_erp_locked(ic); 2463 } 2464 } else 2465 ni->ni_flags |= IEEE80211_NODE_ERP; 2466 } 2467 2468 void 2469 ieee80211_node_join(struct ieee80211_node *ni, int resp) 2470 { 2471 struct ieee80211com *ic = ni->ni_ic; 2472 struct ieee80211vap *vap = ni->ni_vap; 2473 int newassoc; 2474 2475 if (ni->ni_associd == 0) { 2476 uint16_t aid; 2477 2478 KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2479 /* 2480 * It would be good to search the bitmap 2481 * more efficiently, but this will do for now. 2482 */ 2483 for (aid = 1; aid < vap->iv_max_aid; aid++) { 2484 if (!IEEE80211_AID_ISSET(vap, aid)) 2485 break; 2486 } 2487 if (aid >= vap->iv_max_aid) { 2488 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2489 ieee80211_node_leave(ni); 2490 return; 2491 } 2492 ni->ni_associd = aid | 0xc000; 2493 ni->ni_jointime = time_uptime; 2494 IEEE80211_LOCK(ic); 2495 IEEE80211_AID_SET(vap, ni->ni_associd); 2496 vap->iv_sta_assoc++; 2497 ic->ic_sta_assoc++; 2498 2499 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2500 ieee80211_ht_node_join(ni); 2501 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2502 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2503 ieee80211_node_join_11g(ni); 2504 IEEE80211_UNLOCK(ic); 2505 2506 newassoc = 1; 2507 } else 2508 newassoc = 0; 2509 2510 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2511 "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2512 IEEE80211_NODE_AID(ni), 2513 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2514 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2515 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2516 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2517 ni->ni_flags & IEEE80211_NODE_HT ? 2518 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2519 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2520 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2521 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2522 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2523 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2524 ", fast-frames" : "", 2525 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2526 ", turbo" : "" 2527 ); 2528 2529 ieee80211_node_setuptxparms(ni); 2530 ieee80211_ratectl_node_init(ni); 2531 /* give driver a chance to setup state like ni_txrate */ 2532 if (ic->ic_newassoc != NULL) 2533 ic->ic_newassoc(ni, newassoc); 2534 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2535 /* tell the authenticator about new station */ 2536 if (vap->iv_auth->ia_node_join != NULL) 2537 vap->iv_auth->ia_node_join(ni); 2538 ieee80211_notify_node_join(ni, 2539 resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2540 } 2541 2542 static void 2543 disable_protection(struct ieee80211com *ic) 2544 { 2545 KASSERT(ic->ic_nonerpsta == 0 && 2546 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2547 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2548 ic->ic_flags_ext)); 2549 2550 ic->ic_flags &= ~IEEE80211_F_USEPROT; 2551 /* XXX verify mode? */ 2552 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2553 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2554 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2555 } 2556 ieee80211_notify_erp_locked(ic); 2557 } 2558 2559 /* 2560 * Handle a station leaving an 11g network. 2561 */ 2562 static void 2563 ieee80211_node_leave_11g(struct ieee80211_node *ni) 2564 { 2565 struct ieee80211com *ic = ni->ni_ic; 2566 2567 IEEE80211_LOCK_ASSERT(ic); 2568 2569 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2570 ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2571 ic->ic_bsschan->ic_flags)); 2572 2573 /* 2574 * If a long slot station do the slot time bookkeeping. 2575 */ 2576 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2577 KASSERT(ic->ic_longslotsta > 0, 2578 ("bogus long slot station count %d", ic->ic_longslotsta)); 2579 ic->ic_longslotsta--; 2580 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2581 "long slot time station leaves, count now %d", 2582 ic->ic_longslotsta); 2583 if (ic->ic_longslotsta == 0) { 2584 /* 2585 * Re-enable use of short slot time if supported 2586 * and not operating in IBSS mode (per spec). 2587 */ 2588 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2589 ic->ic_opmode != IEEE80211_M_IBSS) { 2590 IEEE80211_DPRINTF(ni->ni_vap, 2591 IEEE80211_MSG_ASSOC, 2592 "%s: re-enable use of short slot time\n", 2593 __func__); 2594 ieee80211_set_shortslottime(ic, 1); 2595 } 2596 } 2597 } 2598 /* 2599 * If a non-ERP station do the protection-related bookkeeping. 2600 */ 2601 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2602 KASSERT(ic->ic_nonerpsta > 0, 2603 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2604 ic->ic_nonerpsta--; 2605 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2606 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2607 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2608 " (non-ERP sta present)" : ""); 2609 if (ic->ic_nonerpsta == 0 && 2610 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2611 IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2612 "%s: disable use of protection\n", __func__); 2613 disable_protection(ic); 2614 } 2615 } 2616 } 2617 2618 /* 2619 * Time out presence of an overlapping bss with non-ERP 2620 * stations. When operating in hostap mode we listen for 2621 * beacons from other stations and if we identify a non-ERP 2622 * station is present we enable protection. To identify 2623 * when all non-ERP stations are gone we time out this 2624 * condition. 2625 */ 2626 static void 2627 ieee80211_erp_timeout(struct ieee80211com *ic) 2628 { 2629 2630 IEEE80211_LOCK_ASSERT(ic); 2631 2632 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2633 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2634 #if 0 2635 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2636 "%s", "age out non-ERP sta present on channel"); 2637 #endif 2638 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2639 if (ic->ic_nonerpsta == 0) 2640 disable_protection(ic); 2641 } 2642 } 2643 2644 /* 2645 * Handle bookkeeping for station deauthentication/disassociation 2646 * when operating as an ap. 2647 */ 2648 void 2649 ieee80211_node_leave(struct ieee80211_node *ni) 2650 { 2651 struct ieee80211com *ic = ni->ni_ic; 2652 struct ieee80211vap *vap = ni->ni_vap; 2653 struct ieee80211_node_table *nt = ni->ni_table; 2654 2655 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2656 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2657 2658 KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2659 ("unexpected operating mode %u", vap->iv_opmode)); 2660 /* 2661 * If node wasn't previously associated all 2662 * we need to do is reclaim the reference. 2663 */ 2664 /* XXX ibss mode bypasses 11g and notification */ 2665 if (ni->ni_associd == 0) 2666 goto done; 2667 /* 2668 * Tell the authenticator the station is leaving. 2669 * Note that we must do this before yanking the 2670 * association id as the authenticator uses the 2671 * associd to locate it's state block. 2672 */ 2673 if (vap->iv_auth->ia_node_leave != NULL) 2674 vap->iv_auth->ia_node_leave(ni); 2675 2676 IEEE80211_LOCK(ic); 2677 IEEE80211_AID_CLR(vap, ni->ni_associd); 2678 ni->ni_associd = 0; 2679 vap->iv_sta_assoc--; 2680 ic->ic_sta_assoc--; 2681 2682 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2683 ieee80211_ht_node_leave(ni); 2684 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2685 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2686 ieee80211_node_leave_11g(ni); 2687 IEEE80211_UNLOCK(ic); 2688 /* 2689 * Cleanup station state. In particular clear various 2690 * state that might otherwise be reused if the node 2691 * is reused before the reference count goes to zero 2692 * (and memory is reclaimed). 2693 */ 2694 ieee80211_sta_leave(ni); 2695 done: 2696 /* 2697 * Remove the node from any table it's recorded in and 2698 * drop the caller's reference. Removal from the table 2699 * is important to insure the node is not reprocessed 2700 * for inactivity. 2701 */ 2702 if (nt != NULL) { 2703 IEEE80211_NODE_LOCK(nt); 2704 node_reclaim(nt, ni); 2705 IEEE80211_NODE_UNLOCK(nt); 2706 } else 2707 ieee80211_free_node(ni); 2708 } 2709 2710 struct rssiinfo { 2711 struct ieee80211vap *vap; 2712 int rssi_samples; 2713 uint32_t rssi_total; 2714 }; 2715 2716 static void 2717 get_hostap_rssi(void *arg, struct ieee80211_node *ni) 2718 { 2719 struct rssiinfo *info = arg; 2720 struct ieee80211vap *vap = ni->ni_vap; 2721 int8_t rssi; 2722 2723 if (info->vap != vap) 2724 return; 2725 /* only associated stations */ 2726 if (ni->ni_associd == 0) 2727 return; 2728 rssi = vap->iv_ic->ic_node_getrssi(ni); 2729 if (rssi != 0) { 2730 info->rssi_samples++; 2731 info->rssi_total += rssi; 2732 } 2733 } 2734 2735 static void 2736 get_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2737 { 2738 struct rssiinfo *info = arg; 2739 struct ieee80211vap *vap = ni->ni_vap; 2740 int8_t rssi; 2741 2742 if (info->vap != vap) 2743 return; 2744 /* only neighbors */ 2745 /* XXX check bssid */ 2746 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2747 return; 2748 rssi = vap->iv_ic->ic_node_getrssi(ni); 2749 if (rssi != 0) { 2750 info->rssi_samples++; 2751 info->rssi_total += rssi; 2752 } 2753 } 2754 2755 #ifdef IEEE80211_SUPPORT_MESH 2756 static void 2757 get_mesh_rssi(void *arg, struct ieee80211_node *ni) 2758 { 2759 struct rssiinfo *info = arg; 2760 struct ieee80211vap *vap = ni->ni_vap; 2761 int8_t rssi; 2762 2763 if (info->vap != vap) 2764 return; 2765 /* only neighbors that peered successfully */ 2766 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 2767 return; 2768 rssi = vap->iv_ic->ic_node_getrssi(ni); 2769 if (rssi != 0) { 2770 info->rssi_samples++; 2771 info->rssi_total += rssi; 2772 } 2773 } 2774 #endif /* IEEE80211_SUPPORT_MESH */ 2775 2776 int8_t 2777 ieee80211_getrssi(struct ieee80211vap *vap) 2778 { 2779 #define NZ(x) ((x) == 0 ? 1 : (x)) 2780 struct ieee80211com *ic = vap->iv_ic; 2781 struct rssiinfo info; 2782 2783 info.rssi_total = 0; 2784 info.rssi_samples = 0; 2785 info.vap = vap; 2786 switch (vap->iv_opmode) { 2787 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2788 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2789 ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2790 break; 2791 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2792 ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2793 break; 2794 #ifdef IEEE80211_SUPPORT_MESH 2795 case IEEE80211_M_MBSS: /* average of all mesh neighbors */ 2796 ieee80211_iterate_nodes(&ic->ic_sta, get_mesh_rssi, &info); 2797 break; 2798 #endif 2799 case IEEE80211_M_MONITOR: /* XXX */ 2800 case IEEE80211_M_STA: /* use stats from associated ap */ 2801 default: 2802 if (vap->iv_bss != NULL) 2803 info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2804 info.rssi_samples = 1; 2805 break; 2806 } 2807 return info.rssi_total / NZ(info.rssi_samples); 2808 #undef NZ 2809 } 2810 2811 void 2812 ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2813 { 2814 2815 if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2816 return; 2817 vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2818 /* for non-station mode return avg'd rssi accounting */ 2819 if (vap->iv_opmode != IEEE80211_M_STA) 2820 *rssi = ieee80211_getrssi(vap); 2821 } 2822