ieee80211_node.c revision 173273
1/*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_node.c 173273 2007-11-02 05:22:25Z sam $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/mbuf.h> 33#include <sys/malloc.h> 34#include <sys/kernel.h> 35 36#include <sys/socket.h> 37 38#include <net/if.h> 39#include <net/if_media.h> 40#include <net/ethernet.h> 41 42#include <net80211/ieee80211_var.h> 43 44#include <net/bpf.h> 45 46/* 47 * Association id's are managed with a bit vector. 48 */ 49#define IEEE80211_AID_SET(b, w) \ 50 ((w)[IEEE80211_AID(b) / 32] |= (1 << (IEEE80211_AID(b) % 32))) 51#define IEEE80211_AID_CLR(b, w) \ 52 ((w)[IEEE80211_AID(b) / 32] &= ~(1 << (IEEE80211_AID(b) % 32))) 53#define IEEE80211_AID_ISSET(b, w) \ 54 ((w)[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 55 56#ifdef IEEE80211_DEBUG_REFCNT 57#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 58#else 59#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 60#endif 61 62static int ieee80211_sta_join1(struct ieee80211_node *); 63 64static struct ieee80211_node *node_alloc(struct ieee80211_node_table *); 65static void node_cleanup(struct ieee80211_node *); 66static void node_free(struct ieee80211_node *); 67static int8_t node_getrssi(const struct ieee80211_node *); 68static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 69 70static void ieee80211_setup_node(struct ieee80211_node_table *, 71 struct ieee80211_node *, const uint8_t *); 72static void _ieee80211_free_node(struct ieee80211_node *); 73 74static void ieee80211_node_table_init(struct ieee80211com *ic, 75 struct ieee80211_node_table *nt, const char *name, 76 int inact, int keymaxix); 77static void ieee80211_node_table_reset(struct ieee80211_node_table *); 78static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 79static void ieee80211_erp_timeout(struct ieee80211com *); 80 81MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 82 83void 84ieee80211_node_attach(struct ieee80211com *ic) 85{ 86 87 ic->ic_node_alloc = node_alloc; 88 ic->ic_node_free = node_free; 89 ic->ic_node_cleanup = node_cleanup; 90 ic->ic_node_getrssi = node_getrssi; 91 ic->ic_node_getsignal = node_getsignal; 92 93 /* default station inactivity timer setings */ 94 ic->ic_inact_init = IEEE80211_INACT_INIT; 95 ic->ic_inact_auth = IEEE80211_INACT_AUTH; 96 ic->ic_inact_run = IEEE80211_INACT_RUN; 97 ic->ic_inact_probe = IEEE80211_INACT_PROBE; 98 99 callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 100 101 /* NB: driver should override */ 102 ic->ic_max_aid = IEEE80211_AID_DEF; 103 104 ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 105} 106 107void 108ieee80211_node_lateattach(struct ieee80211com *ic) 109{ 110 struct ieee80211_rsnparms *rsn; 111 112 if (ic->ic_max_aid > IEEE80211_AID_MAX) 113 ic->ic_max_aid = IEEE80211_AID_MAX; 114 MALLOC(ic->ic_aid_bitmap, uint32_t *, 115 howmany(ic->ic_max_aid, 32) * sizeof(uint32_t), 116 M_80211_NODE, M_NOWAIT | M_ZERO); 117 if (ic->ic_aid_bitmap == NULL) { 118 /* XXX no way to recover */ 119 printf("%s: no memory for AID bitmap!\n", __func__); 120 ic->ic_max_aid = 0; 121 } 122 123 ieee80211_node_table_init(ic, &ic->ic_sta, "station", 124 IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix); 125 126 ieee80211_reset_bss(ic); 127 /* 128 * Setup "global settings" in the bss node so that 129 * each new station automatically inherits them. 130 */ 131 rsn = &ic->ic_bss->ni_rsn; 132 /* WEP, TKIP, and AES-CCM are always supported */ 133 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 134 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 135 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 136 if (ic->ic_caps & IEEE80211_C_AES) 137 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 138 if (ic->ic_caps & IEEE80211_C_CKIP) 139 rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 140 /* 141 * Default unicast cipher to WEP for 802.1x use. If 142 * WPA is enabled the management code will set these 143 * values to reflect. 144 */ 145 rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 146 rsn->rsn_ucastkeylen = 104 / NBBY; 147 /* 148 * WPA says the multicast cipher is the lowest unicast 149 * cipher supported. But we skip WEP which would 150 * otherwise be used based on this criteria. 151 */ 152 rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 153 rsn->rsn_mcastkeylen = 128 / NBBY; 154 155 /* 156 * We support both WPA-PSK and 802.1x; the one used 157 * is determined by the authentication mode and the 158 * setting of the PSK state. 159 */ 160 rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 161 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 162 163 ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode); 164} 165 166void 167ieee80211_node_detach(struct ieee80211com *ic) 168{ 169 170 if (ic->ic_bss != NULL) { 171 ieee80211_free_node(ic->ic_bss); 172 ic->ic_bss = NULL; 173 } 174 ieee80211_node_table_cleanup(&ic->ic_sta); 175 if (ic->ic_aid_bitmap != NULL) { 176 FREE(ic->ic_aid_bitmap, M_80211_NODE); 177 ic->ic_aid_bitmap = NULL; 178 } 179} 180 181/* 182 * Port authorize/unauthorize interfaces for use by an authenticator. 183 */ 184 185void 186ieee80211_node_authorize(struct ieee80211_node *ni) 187{ 188 struct ieee80211com *ic = ni->ni_ic; 189 190 ni->ni_flags |= IEEE80211_NODE_AUTH; 191 ni->ni_inact_reload = ic->ic_inact_run; 192 ni->ni_inact = ni->ni_inact_reload; 193} 194 195void 196ieee80211_node_unauthorize(struct ieee80211_node *ni) 197{ 198 struct ieee80211com *ic = ni->ni_ic; 199 200 ni->ni_flags &= ~IEEE80211_NODE_AUTH; 201 ni->ni_inact_reload = ic->ic_inact_auth; 202 if (ni->ni_inact > ni->ni_inact_reload) 203 ni->ni_inact = ni->ni_inact_reload; 204} 205 206/* 207 * Set/change the channel. The rate set is also updated as 208 * to insure a consistent view by drivers. 209 */ 210static void 211ieee80211_node_set_chan(struct ieee80211com *ic, struct ieee80211_node *ni) 212{ 213 struct ieee80211_channel *chan = ic->ic_bsschan; 214 215#if 0 216 KASSERT(chan != IEEE80211_CHAN_ANYC, ("bss channel not setup")); 217#else 218 if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */ 219 chan = ic->ic_curchan; 220#endif 221 ni->ni_chan = chan; 222 if (IEEE80211_IS_CHAN_HT(chan)) { 223 /* 224 * XXX Gotta be careful here; the rate set returned by 225 * ieee80211_get_suprates is actually any HT rate 226 * set so blindly copying it will be bad. We must 227 * install the legacy rate est in ni_rates and the 228 * HT rate set in ni_htrates. 229 */ 230 ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 231 } 232 ni->ni_rates = *ieee80211_get_suprates(ic, chan); 233} 234 235/* 236 * Probe the curent channel, if allowed, while scanning. 237 * If the channel is not marked passive-only then send 238 * a probe request immediately. Otherwise mark state and 239 * listen for beacons on the channel; if we receive something 240 * then we'll transmit a probe request. 241 */ 242void 243ieee80211_probe_curchan(struct ieee80211com *ic, int force) 244{ 245 struct ifnet *ifp = ic->ic_ifp; 246 247 if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 || force) { 248 /* 249 * XXX send both broadcast+directed probe request 250 */ 251 ieee80211_send_probereq(ic->ic_bss, 252 ic->ic_myaddr, ifp->if_broadcastaddr, 253 ifp->if_broadcastaddr, 254 ic->ic_des_ssid[0].ssid, ic->ic_des_ssid[0].len, 255 ic->ic_opt_ie, ic->ic_opt_ie_len); 256 } else 257 ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN; 258} 259 260static __inline void 261copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 262{ 263 /* propagate useful state */ 264 nbss->ni_authmode = obss->ni_authmode; 265 nbss->ni_txpower = obss->ni_txpower; 266 nbss->ni_vlan = obss->ni_vlan; 267 nbss->ni_rsn = obss->ni_rsn; 268 /* XXX statistics? */ 269} 270 271void 272ieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 273{ 274 struct ieee80211_node_table *nt; 275 struct ieee80211_node *ni; 276 277 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 278 "%s: creating ibss\n", __func__); 279 280 /* 281 * Create the station/neighbor table. Note that for adhoc 282 * mode we make the initial inactivity timer longer since 283 * we create nodes only through discovery and they typically 284 * are long-lived associations. 285 */ 286 nt = &ic->ic_sta; 287 IEEE80211_NODE_LOCK(nt); 288 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 289 nt->nt_name = "station"; 290 nt->nt_inact_init = ic->ic_inact_init; 291 } else { 292 nt->nt_name = "neighbor"; 293 nt->nt_inact_init = ic->ic_inact_run; 294 } 295 IEEE80211_NODE_UNLOCK(nt); 296 297 ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 298 if (ni == NULL) { 299 /* XXX recovery? */ 300 return; 301 } 302 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 303 ni->ni_esslen = ic->ic_des_ssid[0].len; 304 memcpy(ni->ni_essid, ic->ic_des_ssid[0].ssid, ni->ni_esslen); 305 if (ic->ic_bss != NULL) 306 copy_bss(ni, ic->ic_bss); 307 ni->ni_intval = ic->ic_bintval; 308 if (ic->ic_flags & IEEE80211_F_PRIVACY) 309 ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 310 if (ic->ic_phytype == IEEE80211_T_FH) { 311 ni->ni_fhdwell = 200; /* XXX */ 312 ni->ni_fhindex = 1; 313 } 314 if (ic->ic_opmode == IEEE80211_M_IBSS) { 315 ic->ic_flags |= IEEE80211_F_SIBSS; 316 ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 317 if (ic->ic_flags & IEEE80211_F_DESBSSID) 318 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 319 else { 320 get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 321 /* clear group bit, add local bit */ 322 ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 323 } 324 } else if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 325 if (ic->ic_flags & IEEE80211_F_DESBSSID) 326 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 327 else 328 memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 329 } 330 /* 331 * Fix the channel and related attributes. 332 */ 333 ic->ic_bsschan = chan; 334 ieee80211_node_set_chan(ic, ni); 335 ic->ic_curmode = ieee80211_chan2mode(chan); 336 /* 337 * Do mode-specific rate setup. 338 */ 339 if (IEEE80211_IS_CHAN_FULL(chan)) { 340 if (IEEE80211_IS_CHAN_ANYG(chan)) { 341 /* 342 * Use a mixed 11b/11g rate set. 343 */ 344 ieee80211_set11gbasicrates(&ni->ni_rates, 345 IEEE80211_MODE_11G); 346 } else if (IEEE80211_IS_CHAN_B(chan)) { 347 /* 348 * Force pure 11b rate set. 349 */ 350 ieee80211_set11gbasicrates(&ni->ni_rates, 351 IEEE80211_MODE_11B); 352 } 353 } 354 355 (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 356} 357 358/* 359 * Reset bss state on transition to the INIT state. 360 * Clear any stations from the table (they have been 361 * deauth'd) and reset the bss node (clears key, rate 362 * etc. state). 363 */ 364void 365ieee80211_reset_bss(struct ieee80211com *ic) 366{ 367 struct ieee80211_node *ni, *obss; 368 369 callout_drain(&ic->ic_inact); 370 ieee80211_node_table_reset(&ic->ic_sta); 371 ieee80211_reset_erp(ic); 372 373 ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 374 KASSERT(ni != NULL, ("unable to setup inital BSS node")); 375 obss = ic->ic_bss; 376 ic->ic_bss = ieee80211_ref_node(ni); 377 if (obss != NULL) { 378 copy_bss(ni, obss); 379 ni->ni_intval = ic->ic_bintval; 380 ieee80211_free_node(obss); 381 } 382} 383 384static int 385match_ssid(const struct ieee80211_node *ni, 386 int nssid, const struct ieee80211_scan_ssid ssids[]) 387{ 388 int i; 389 390 for (i = 0; i < nssid; i++) { 391 if (ni->ni_esslen == ssids[i].len && 392 memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 393 return 1; 394 } 395 return 0; 396} 397 398/* 399 * Test a node for suitability/compatibility. 400 */ 401static int 402check_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 403{ 404 uint8_t rate; 405 406 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 407 return 0; 408 if (ic->ic_opmode == IEEE80211_M_IBSS) { 409 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 410 return 0; 411 } else { 412 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 413 return 0; 414 } 415 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 416 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 417 return 0; 418 } else { 419 /* XXX does this mean privacy is supported or required? */ 420 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 421 return 0; 422 } 423 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 424 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 425 if (rate & IEEE80211_RATE_BASIC) 426 return 0; 427 if (ic->ic_des_nssid != 0 && 428 !match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid)) 429 return 0; 430 if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 431 !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 432 return 0; 433 return 1; 434} 435 436#ifdef IEEE80211_DEBUG 437/* 438 * Display node suitability/compatibility. 439 */ 440static void 441check_bss_debug(struct ieee80211com *ic, struct ieee80211_node *ni) 442{ 443 uint8_t rate; 444 int fail; 445 446 fail = 0; 447 if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 448 fail |= 0x01; 449 if (ic->ic_opmode == IEEE80211_M_IBSS) { 450 if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 451 fail |= 0x02; 452 } else { 453 if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 454 fail |= 0x02; 455 } 456 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 457 if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 458 fail |= 0x04; 459 } else { 460 /* XXX does this mean privacy is supported or required? */ 461 if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 462 fail |= 0x04; 463 } 464 rate = ieee80211_fix_rate(ni, &ni->ni_rates, 465 IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 466 if (rate & IEEE80211_RATE_BASIC) 467 fail |= 0x08; 468 if (ic->ic_des_nssid != 0 && 469 !match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid)) 470 fail |= 0x10; 471 if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 472 !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 473 fail |= 0x20; 474 475 printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 476 printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 477 printf(" %3d%c", 478 ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 479 printf(" %+4d", ni->ni_rssi); 480 printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 481 fail & 0x08 ? '!' : ' '); 482 printf(" %4s%c", 483 (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 484 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 485 "????", 486 fail & 0x02 ? '!' : ' '); 487 printf(" %3s%c ", 488 (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 489 fail & 0x04 ? '!' : ' '); 490 ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 491 printf("%s\n", fail & 0x10 ? "!" : ""); 492} 493#endif /* IEEE80211_DEBUG */ 494 495/* 496 * Handle 802.11 ad hoc network merge. The 497 * convention, set by the Wireless Ethernet Compatibility Alliance 498 * (WECA), is that an 802.11 station will change its BSSID to match 499 * the "oldest" 802.11 ad hoc network, on the same channel, that 500 * has the station's desired SSID. The "oldest" 802.11 network 501 * sends beacons with the greatest TSF timestamp. 502 * 503 * The caller is assumed to validate TSF's before attempting a merge. 504 * 505 * Return !0 if the BSSID changed, 0 otherwise. 506 */ 507int 508ieee80211_ibss_merge(struct ieee80211_node *ni) 509{ 510 struct ieee80211com *ic = ni->ni_ic; 511 512 if (ni == ic->ic_bss || 513 IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 514 /* unchanged, nothing to do */ 515 return 0; 516 } 517 if (!check_bss(ic, ni)) { 518 /* capabilities mismatch */ 519 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 520 "%s: merge failed, capabilities mismatch\n", __func__); 521#ifdef IEEE80211_DEBUG 522 if (ieee80211_msg_assoc(ic)) 523 check_bss_debug(ic, ni); 524#endif 525 ic->ic_stats.is_ibss_capmismatch++; 526 return 0; 527 } 528 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 529 "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 530 ether_sprintf(ni->ni_bssid), 531 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 532 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 533 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 534 ); 535 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 536} 537 538/* 539 * Change the bss channel. 540 */ 541void 542ieee80211_setbsschan(struct ieee80211com *ic, struct ieee80211_channel *c) 543{ 544 ic->ic_bsschan = c; 545 ic->ic_curchan = ic->ic_bsschan; 546 ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 547 ic->ic_set_channel(ic); 548} 549 550/* 551 * Join the specified IBSS/BSS network. The node is assumed to 552 * be passed in with a held reference. 553 */ 554static int 555ieee80211_sta_join1(struct ieee80211_node *selbs) 556{ 557 struct ieee80211com *ic = selbs->ni_ic; 558 struct ieee80211_node *obss; 559 int canreassoc; 560 561 if (ic->ic_opmode == IEEE80211_M_IBSS) { 562 struct ieee80211_node_table *nt; 563 /* 564 * Fillin the neighbor table; it will already 565 * exist if we are simply switching mastership. 566 * XXX ic_sta always setup so this is unnecessary? 567 */ 568 nt = &ic->ic_sta; 569 IEEE80211_NODE_LOCK(nt); 570 nt->nt_name = "neighbor"; 571 nt->nt_inact_init = ic->ic_inact_run; 572 IEEE80211_NODE_UNLOCK(nt); 573 } 574 575 /* 576 * Committed to selbs, setup state. 577 */ 578 obss = ic->ic_bss; 579 /* 580 * Check if old+new node have the same address in which 581 * case we can reassociate when operating in sta mode. 582 */ 583 canreassoc = (obss != NULL && 584 ic->ic_state == IEEE80211_S_RUN && 585 IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 586 ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 587 if (obss != NULL) { 588 copy_bss(selbs, obss); 589 ieee80211_free_node(obss); 590 } 591 592 /* 593 * Delete unusable rates; we've already checked 594 * that the negotiated rate set is acceptable. 595 */ 596 ieee80211_fix_rate(ic->ic_bss, &ic->ic_bss->ni_rates, 597 IEEE80211_F_DODEL | IEEE80211_F_JOIN); 598 599 ieee80211_setbsschan(ic, selbs->ni_chan); 600 /* 601 * Set the erp state (mostly the slot time) to deal with 602 * the auto-select case; this should be redundant if the 603 * mode is locked. 604 */ 605 ieee80211_reset_erp(ic); 606 ieee80211_wme_initparams(ic); 607 608 if (ic->ic_opmode == IEEE80211_M_STA) { 609 if (canreassoc) { 610 /* Reassociate */ 611 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 1); 612 } else { 613 /* 614 * Act as if we received a DEAUTH frame in case we 615 * are invoked from the RUN state. This will cause 616 * us to try to re-authenticate if we are operating 617 * as a station. 618 */ 619 ieee80211_new_state(ic, IEEE80211_S_AUTH, 620 IEEE80211_FC0_SUBTYPE_DEAUTH); 621 } 622 } else 623 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 624 return 1; 625} 626 627int 628ieee80211_sta_join(struct ieee80211com *ic, 629 const struct ieee80211_scan_entry *se) 630{ 631 struct ieee80211_node *ni; 632 633 ni = ieee80211_alloc_node(&ic->ic_sta, se->se_macaddr); 634 if (ni == NULL) { 635 /* XXX msg */ 636 return 0; 637 } 638 /* 639 * Expand scan state into node's format. 640 * XXX may not need all this stuff 641 */ 642 IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 643 ni->ni_esslen = se->se_ssid[1]; 644 memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 645 ni->ni_rstamp = se->se_rstamp; 646 ni->ni_tstamp.tsf = se->se_tstamp.tsf; 647 ni->ni_intval = se->se_intval; 648 ni->ni_capinfo = se->se_capinfo; 649 ni->ni_chan = se->se_chan; 650 ni->ni_timoff = se->se_timoff; 651 ni->ni_fhdwell = se->se_fhdwell; 652 ni->ni_fhindex = se->se_fhindex; 653 ni->ni_erp = se->se_erp; 654 ni->ni_rssi = se->se_rssi; 655 ni->ni_noise = se->se_noise; 656 if (se->se_htcap_ie != NULL) 657 ieee80211_saveie(&ni->ni_htcap_ie, se->se_htcap_ie); 658 if (se->se_wpa_ie != NULL) 659 ieee80211_saveie(&ni->ni_wpa_ie, se->se_wpa_ie); 660 if (se->se_rsn_ie != NULL) 661 ieee80211_saveie(&ni->ni_rsn_ie, se->se_rsn_ie); 662 if (se->se_wme_ie != NULL) 663 ieee80211_saveie(&ni->ni_wme_ie, se->se_wme_ie); 664 if (se->se_ath_ie != NULL) 665 ieee80211_saveath(ni, se->se_ath_ie); 666 667 ic->ic_dtim_period = se->se_dtimperiod; 668 ic->ic_dtim_count = 0; 669 670 /* NB: must be after ni_chan is setup */ 671 ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 672 IEEE80211_F_DOSORT); 673 674 return ieee80211_sta_join1(ieee80211_ref_node(ni)); 675} 676 677/* 678 * Leave the specified IBSS/BSS network. The node is assumed to 679 * be passed in with a held reference. 680 */ 681void 682ieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 683{ 684 ic->ic_node_cleanup(ni); 685 ieee80211_notify_node_leave(ic, ni); 686} 687 688static struct ieee80211_node * 689node_alloc(struct ieee80211_node_table *nt) 690{ 691 struct ieee80211_node *ni; 692 693 MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 694 M_80211_NODE, M_NOWAIT | M_ZERO); 695 return ni; 696} 697 698/* 699 * Reclaim any resources in a node and reset any critical 700 * state. Typically nodes are free'd immediately after, 701 * but in some cases the storage may be reused so we need 702 * to insure consistent state (should probably fix that). 703 */ 704static void 705node_cleanup(struct ieee80211_node *ni) 706{ 707#define N(a) (sizeof(a)/sizeof(a[0])) 708 struct ieee80211com *ic = ni->ni_ic; 709 int i; 710 711 /* NB: preserve ni_table */ 712 if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 713 if (ic->ic_opmode != IEEE80211_M_STA) 714 ic->ic_ps_sta--; 715 ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 716 IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 717 "[%s] power save mode off, %u sta's in ps mode\n", 718 ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 719 } 720 /* 721 * Cleanup any HT-related state. 722 */ 723 if (ni->ni_flags & IEEE80211_NODE_HT) 724 ieee80211_ht_node_cleanup(ni); 725 /* 726 * Clear AREF flag that marks the authorization refcnt bump 727 * has happened. This is probably not needed as the node 728 * should always be removed from the table so not found but 729 * do it just in case. 730 */ 731 ni->ni_flags &= ~IEEE80211_NODE_AREF; 732 733 /* 734 * Drain power save queue and, if needed, clear TIM. 735 */ 736 if (ieee80211_node_saveq_drain(ni) != 0 && ic->ic_set_tim != NULL) 737 ic->ic_set_tim(ni, 0); 738 739 ni->ni_associd = 0; 740 if (ni->ni_challenge != NULL) { 741 FREE(ni->ni_challenge, M_80211_NODE); 742 ni->ni_challenge = NULL; 743 } 744 /* 745 * Preserve SSID, WPA, and WME ie's so the bss node is 746 * reusable during a re-auth/re-assoc state transition. 747 * If we remove these data they will not be recreated 748 * because they come from a probe-response or beacon frame 749 * which cannot be expected prior to the association-response. 750 * This should not be an issue when operating in other modes 751 * as stations leaving always go through a full state transition 752 * which will rebuild this state. 753 * 754 * XXX does this leave us open to inheriting old state? 755 */ 756 for (i = 0; i < N(ni->ni_rxfrag); i++) 757 if (ni->ni_rxfrag[i] != NULL) { 758 m_freem(ni->ni_rxfrag[i]); 759 ni->ni_rxfrag[i] = NULL; 760 } 761 /* 762 * Must be careful here to remove any key map entry w/o a LOR. 763 */ 764 ieee80211_node_delucastkey(ni); 765#undef N 766} 767 768static void 769node_free(struct ieee80211_node *ni) 770{ 771 struct ieee80211com *ic = ni->ni_ic; 772 773 ic->ic_node_cleanup(ni); 774 if (ni->ni_wpa_ie != NULL) 775 FREE(ni->ni_wpa_ie, M_80211_NODE); 776 if (ni->ni_rsn_ie != NULL) 777 FREE(ni->ni_rsn_ie, M_80211_NODE); 778 if (ni->ni_wme_ie != NULL) 779 FREE(ni->ni_wme_ie, M_80211_NODE); 780 if (ni->ni_ath_ie != NULL) 781 FREE(ni->ni_ath_ie, M_80211_NODE); 782 IEEE80211_NODE_SAVEQ_DESTROY(ni); 783 FREE(ni, M_80211_NODE); 784} 785 786static int8_t 787node_getrssi(const struct ieee80211_node *ni) 788{ 789 return ni->ni_rssi; 790} 791 792static void 793node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 794{ 795 *rssi = ni->ni_rssi; 796 *noise = ni->ni_noise; 797} 798 799static void 800ieee80211_setup_node(struct ieee80211_node_table *nt, 801 struct ieee80211_node *ni, const uint8_t *macaddr) 802{ 803 struct ieee80211com *ic = nt->nt_ic; 804 int hash; 805 806 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 807 "%s %p<%s> in %s table\n", __func__, ni, 808 ether_sprintf(macaddr), nt->nt_name); 809 810 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 811 hash = IEEE80211_NODE_HASH(macaddr); 812 ieee80211_node_initref(ni); /* mark referenced */ 813 ni->ni_chan = IEEE80211_CHAN_ANYC; 814 ni->ni_authmode = IEEE80211_AUTH_OPEN; 815 ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 816 ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 817 ni->ni_inact_reload = nt->nt_inact_init; 818 ni->ni_inact = ni->ni_inact_reload; 819 ni->ni_ath_defkeyix = 0x7fff; 820 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 821 822 IEEE80211_NODE_LOCK(nt); 823 TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 824 LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 825 ni->ni_table = nt; 826 ni->ni_ic = ic; 827 IEEE80211_NODE_UNLOCK(nt); 828} 829 830struct ieee80211_node * 831ieee80211_alloc_node(struct ieee80211_node_table *nt, const uint8_t *macaddr) 832{ 833 struct ieee80211com *ic = nt->nt_ic; 834 struct ieee80211_node *ni; 835 836 ni = ic->ic_node_alloc(nt); 837 if (ni != NULL) 838 ieee80211_setup_node(nt, ni, macaddr); 839 else 840 ic->ic_stats.is_rx_nodealloc++; 841 return ni; 842} 843 844/* 845 * Craft a temporary node suitable for sending a management frame 846 * to the specified station. We craft only as much state as we 847 * need to do the work since the node will be immediately reclaimed 848 * once the send completes. 849 */ 850struct ieee80211_node * 851ieee80211_tmp_node(struct ieee80211com *ic, const uint8_t *macaddr) 852{ 853 struct ieee80211_node *ni; 854 855 ni = ic->ic_node_alloc(&ic->ic_sta); 856 if (ni != NULL) { 857 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 858 "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 859 860 IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 861 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 862 ieee80211_node_initref(ni); /* mark referenced */ 863 ni->ni_txpower = ic->ic_bss->ni_txpower; 864 /* NB: required by ieee80211_fix_rate */ 865 ieee80211_node_set_chan(ic, ni); 866 ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, 867 IEEE80211_KEYIX_NONE); 868 /* XXX optimize away */ 869 IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 870 871 ni->ni_table = NULL; /* NB: pedantic */ 872 ni->ni_ic = ic; 873 } else { 874 /* XXX msg */ 875 ic->ic_stats.is_rx_nodealloc++; 876 } 877 return ni; 878} 879 880struct ieee80211_node * 881ieee80211_dup_bss(struct ieee80211_node_table *nt, const uint8_t *macaddr) 882{ 883 struct ieee80211com *ic = nt->nt_ic; 884 struct ieee80211_node *ni; 885 886 ni = ic->ic_node_alloc(nt); 887 if (ni != NULL) { 888 ieee80211_setup_node(nt, ni, macaddr); 889 /* 890 * Inherit from ic_bss. 891 */ 892 ni->ni_authmode = ic->ic_bss->ni_authmode; 893 ni->ni_txpower = ic->ic_bss->ni_txpower; 894 ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 895 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 896 ieee80211_node_set_chan(ic, ni); 897 ni->ni_rsn = ic->ic_bss->ni_rsn; 898 } else 899 ic->ic_stats.is_rx_nodealloc++; 900 return ni; 901} 902 903static struct ieee80211_node * 904#ifdef IEEE80211_DEBUG_REFCNT 905_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 906 const uint8_t *macaddr, const char *func, int line) 907#else 908_ieee80211_find_node(struct ieee80211_node_table *nt, 909 const uint8_t *macaddr) 910#endif 911{ 912 struct ieee80211_node *ni; 913 int hash; 914 915 IEEE80211_NODE_LOCK_ASSERT(nt); 916 917 hash = IEEE80211_NODE_HASH(macaddr); 918 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 919 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 920 ieee80211_ref_node(ni); /* mark referenced */ 921#ifdef IEEE80211_DEBUG_REFCNT 922 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 923 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 924 func, line, 925 ni, ether_sprintf(ni->ni_macaddr), 926 ieee80211_node_refcnt(ni)); 927#endif 928 return ni; 929 } 930 } 931 return NULL; 932} 933#ifdef IEEE80211_DEBUG_REFCNT 934#define _ieee80211_find_node(nt, mac) \ 935 _ieee80211_find_node_debug(nt, mac, func, line) 936#endif 937 938struct ieee80211_node * 939#ifdef IEEE80211_DEBUG_REFCNT 940ieee80211_find_node_debug(struct ieee80211_node_table *nt, 941 const uint8_t *macaddr, const char *func, int line) 942#else 943ieee80211_find_node(struct ieee80211_node_table *nt, const uint8_t *macaddr) 944#endif 945{ 946 struct ieee80211_node *ni; 947 948 IEEE80211_NODE_LOCK(nt); 949 ni = _ieee80211_find_node(nt, macaddr); 950 IEEE80211_NODE_UNLOCK(nt); 951 return ni; 952} 953 954/* 955 * Fake up a node; this handles node discovery in adhoc mode. 956 * Note that for the driver's benefit we we treat this like 957 * an association so the driver has an opportunity to setup 958 * it's private state. 959 */ 960struct ieee80211_node * 961ieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 962 const uint8_t macaddr[IEEE80211_ADDR_LEN]) 963{ 964 struct ieee80211com *ic = nt->nt_ic; 965 struct ieee80211_node *ni; 966 967 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 968 "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 969 ni = ieee80211_dup_bss(nt, macaddr); 970 if (ni != NULL) { 971 /* XXX no rate negotiation; just dup */ 972 ni->ni_rates = ic->ic_bss->ni_rates; 973 if (ic->ic_newassoc != NULL) 974 ic->ic_newassoc(ni, 1); 975 if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 976 /* 977 * In adhoc demo mode there are no management 978 * frames to use to discover neighbor capabilities, 979 * so blindly propagate the local configuration 980 * so we can do interesting things (e.g. use 981 * WME to disable ACK's). 982 */ 983 if (ic->ic_flags & IEEE80211_F_WME) 984 ni->ni_flags |= IEEE80211_NODE_QOS; 985 if (ic->ic_flags & IEEE80211_F_FF) 986 ni->ni_flags |= IEEE80211_NODE_FF; 987 } 988 /* XXX not right for 802.1x/WPA */ 989 ieee80211_node_authorize(ni); 990 } 991 return ni; 992} 993 994void 995ieee80211_init_neighbor(struct ieee80211_node *ni, 996 const struct ieee80211_frame *wh, 997 const struct ieee80211_scanparams *sp) 998{ 999 ni->ni_esslen = sp->ssid[1]; 1000 memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1001 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1002 memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1003 ni->ni_intval = sp->bintval; 1004 ni->ni_capinfo = sp->capinfo; 1005 ni->ni_chan = ni->ni_ic->ic_curchan; 1006 ni->ni_fhdwell = sp->fhdwell; 1007 ni->ni_fhindex = sp->fhindex; 1008 ni->ni_erp = sp->erp; 1009 ni->ni_timoff = sp->timoff; 1010 if (sp->wme != NULL) 1011 ieee80211_saveie(&ni->ni_wme_ie, sp->wme); 1012 if (sp->wpa != NULL) 1013 ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa); 1014 if (sp->rsn != NULL) 1015 ieee80211_saveie(&ni->ni_rsn_ie, sp->rsn); 1016 if (sp->ath != NULL) 1017 ieee80211_saveath(ni, sp->ath); 1018 1019 /* NB: must be after ni_chan is setup */ 1020 ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1021 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1022 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1023} 1024 1025/* 1026 * Do node discovery in adhoc mode on receipt of a beacon 1027 * or probe response frame. Note that for the driver's 1028 * benefit we we treat this like an association so the 1029 * driver has an opportunity to setup it's private state. 1030 */ 1031struct ieee80211_node * 1032ieee80211_add_neighbor(struct ieee80211com *ic, 1033 const struct ieee80211_frame *wh, 1034 const struct ieee80211_scanparams *sp) 1035{ 1036 struct ieee80211_node *ni; 1037 1038 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1039 "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1040 ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */ 1041 if (ni != NULL) { 1042 ieee80211_init_neighbor(ni, wh, sp); 1043 if (ic->ic_newassoc != NULL) 1044 ic->ic_newassoc(ni, 1); 1045 /* XXX not right for 802.1x/WPA */ 1046 ieee80211_node_authorize(ni); 1047 } 1048 return ni; 1049} 1050 1051#define IS_CTL(wh) \ 1052 ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1053#define IS_PSPOLL(wh) \ 1054 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1055#define IS_BAR(wh) \ 1056 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1057 1058/* 1059 * Locate the node for sender, track state, and then pass the 1060 * (referenced) node up to the 802.11 layer for its use. We 1061 * are required to pass some node so we fall back to ic_bss 1062 * when this frame is from an unknown sender. The 802.11 layer 1063 * knows this means the sender wasn't in the node table and 1064 * acts accordingly. 1065 */ 1066struct ieee80211_node * 1067#ifdef IEEE80211_DEBUG_REFCNT 1068ieee80211_find_rxnode_debug(struct ieee80211com *ic, 1069 const struct ieee80211_frame_min *wh, const char *func, int line) 1070#else 1071ieee80211_find_rxnode(struct ieee80211com *ic, 1072 const struct ieee80211_frame_min *wh) 1073#endif 1074{ 1075 struct ieee80211_node_table *nt; 1076 struct ieee80211_node *ni; 1077 1078 /* XXX check ic_bss first in station mode */ 1079 /* XXX 4-address frames? */ 1080 nt = &ic->ic_sta; 1081 IEEE80211_NODE_LOCK(nt); 1082 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1083 ni = _ieee80211_find_node(nt, wh->i_addr1); 1084 else 1085 ni = _ieee80211_find_node(nt, wh->i_addr2); 1086 if (ni == NULL) 1087 ni = ieee80211_ref_node(ic->ic_bss); 1088 IEEE80211_NODE_UNLOCK(nt); 1089 1090 return ni; 1091} 1092 1093/* 1094 * Like ieee80211_find_rxnode but use the supplied h/w 1095 * key index as a hint to locate the node in the key 1096 * mapping table. If an entry is present at the key 1097 * index we return it; otherwise do a normal lookup and 1098 * update the mapping table if the station has a unicast 1099 * key assigned to it. 1100 */ 1101struct ieee80211_node * 1102#ifdef IEEE80211_DEBUG_REFCNT 1103ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1104 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1105 const char *func, int line) 1106#else 1107ieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1108 const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1109#endif 1110{ 1111 struct ieee80211_node_table *nt; 1112 struct ieee80211_node *ni; 1113 1114 nt = &ic->ic_sta; 1115 IEEE80211_NODE_LOCK(nt); 1116 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1117 ni = nt->nt_keyixmap[keyix]; 1118 else 1119 ni = NULL; 1120 if (ni == NULL) { 1121 if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1122 ni = _ieee80211_find_node(nt, wh->i_addr1); 1123 else 1124 ni = _ieee80211_find_node(nt, wh->i_addr2); 1125 if (ni == NULL) 1126 ni = ieee80211_ref_node(ic->ic_bss); 1127 if (nt->nt_keyixmap != NULL) { 1128 /* 1129 * If the station has a unicast key cache slot 1130 * assigned update the key->node mapping table. 1131 */ 1132 keyix = ni->ni_ucastkey.wk_rxkeyix; 1133 /* XXX can keyixmap[keyix] != NULL? */ 1134 if (keyix < nt->nt_keyixmax && 1135 nt->nt_keyixmap[keyix] == NULL) { 1136 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1137 "%s: add key map entry %p<%s> refcnt %d\n", 1138 __func__, ni, ether_sprintf(ni->ni_macaddr), 1139 ieee80211_node_refcnt(ni)+1); 1140 nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1141 } 1142 } 1143 } else 1144 ieee80211_ref_node(ni); 1145 IEEE80211_NODE_UNLOCK(nt); 1146 1147 return ni; 1148} 1149#undef IS_BAR 1150#undef IS_PSPOLL 1151#undef IS_CTL 1152 1153/* 1154 * Return a reference to the appropriate node for sending 1155 * a data frame. This handles node discovery in adhoc networks. 1156 */ 1157struct ieee80211_node * 1158#ifdef IEEE80211_DEBUG_REFCNT 1159ieee80211_find_txnode_debug(struct ieee80211com *ic, const uint8_t *macaddr, 1160 const char *func, int line) 1161#else 1162ieee80211_find_txnode(struct ieee80211com *ic, const uint8_t *macaddr) 1163#endif 1164{ 1165 struct ieee80211_node_table *nt = &ic->ic_sta; 1166 struct ieee80211_node *ni; 1167 1168 /* 1169 * The destination address should be in the node table 1170 * unless this is a multicast/broadcast frame. We can 1171 * also optimize station mode operation, all frames go 1172 * to the bss node. 1173 */ 1174 /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1175 IEEE80211_NODE_LOCK(nt); 1176 if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1177 ni = ieee80211_ref_node(ic->ic_bss); 1178 else { 1179 ni = _ieee80211_find_node(nt, macaddr); 1180 if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1181 (ni != NULL && ni->ni_associd == 0)) { 1182 /* 1183 * Station is not associated; don't permit the 1184 * data frame to be sent by returning NULL. This 1185 * is kinda a kludge but the least intrusive way 1186 * to add this check into all drivers. 1187 */ 1188 ieee80211_unref_node(&ni); /* NB: null's ni */ 1189 } 1190 } 1191 IEEE80211_NODE_UNLOCK(nt); 1192 1193 if (ni == NULL) { 1194 if (ic->ic_opmode == IEEE80211_M_IBSS || 1195 ic->ic_opmode == IEEE80211_M_AHDEMO) { 1196 /* 1197 * In adhoc mode cons up a node for the destination. 1198 * Note that we need an additional reference for the 1199 * caller to be consistent with _ieee80211_find_node. 1200 */ 1201 ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1202 if (ni != NULL) 1203 (void) ieee80211_ref_node(ni); 1204 } else { 1205 IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1206 "[%s] no node, discard frame (%s)\n", 1207 ether_sprintf(macaddr), __func__); 1208 ic->ic_stats.is_tx_nonode++; 1209 } 1210 } 1211 return ni; 1212} 1213 1214/* 1215 * Like find but search based on the ssid too. 1216 */ 1217struct ieee80211_node * 1218#ifdef IEEE80211_DEBUG_REFCNT 1219ieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1220 const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid, 1221 const char *func, int line) 1222#else 1223ieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1224 const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid) 1225#endif 1226{ 1227#define MATCH_SSID(ni, ssid, ssidlen) \ 1228 (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0) 1229 static const uint8_t zeromac[IEEE80211_ADDR_LEN]; 1230 struct ieee80211_node *ni; 1231 int hash; 1232 1233 IEEE80211_NODE_LOCK(nt); 1234 /* 1235 * A mac address that is all zero means match only the ssid; 1236 * otherwise we must match both. 1237 */ 1238 if (IEEE80211_ADDR_EQ(macaddr, zeromac)) { 1239 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1240 if (MATCH_SSID(ni, ssid, ssidlen)) 1241 break; 1242 } 1243 } else { 1244 hash = IEEE80211_NODE_HASH(macaddr); 1245 LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1246 if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1247 MATCH_SSID(ni, ssid, ssidlen)) 1248 break; 1249 } 1250 } 1251 if (ni != NULL) { 1252 ieee80211_ref_node(ni); /* mark referenced */ 1253 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1254 REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr), 1255 ieee80211_node_refcnt(ni)); 1256 } 1257 IEEE80211_NODE_UNLOCK(nt); 1258 return ni; 1259#undef MATCH_SSID 1260} 1261 1262static void 1263_ieee80211_free_node(struct ieee80211_node *ni) 1264{ 1265 struct ieee80211com *ic = ni->ni_ic; 1266 struct ieee80211_node_table *nt = ni->ni_table; 1267 1268 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1269 "%s %p<%s> in %s table\n", __func__, ni, 1270 ether_sprintf(ni->ni_macaddr), 1271 nt != NULL ? nt->nt_name : "<gone>"); 1272 1273 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1274 if (nt != NULL) { 1275 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1276 LIST_REMOVE(ni, ni_hash); 1277 } 1278 ic->ic_node_free(ni); 1279} 1280 1281void 1282#ifdef IEEE80211_DEBUG_REFCNT 1283ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1284#else 1285ieee80211_free_node(struct ieee80211_node *ni) 1286#endif 1287{ 1288 struct ieee80211_node_table *nt = ni->ni_table; 1289 1290#ifdef IEEE80211_DEBUG_REFCNT 1291 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1292 "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1293 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1294#endif 1295 if (nt != NULL) { 1296 IEEE80211_NODE_LOCK(nt); 1297 if (ieee80211_node_dectestref(ni)) { 1298 /* 1299 * Last reference, reclaim state. 1300 */ 1301 _ieee80211_free_node(ni); 1302 } else if (ieee80211_node_refcnt(ni) == 1 && 1303 nt->nt_keyixmap != NULL) { 1304 ieee80211_keyix keyix; 1305 /* 1306 * Check for a last reference in the key mapping table. 1307 */ 1308 keyix = ni->ni_ucastkey.wk_rxkeyix; 1309 if (keyix < nt->nt_keyixmax && 1310 nt->nt_keyixmap[keyix] == ni) { 1311 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1312 "%s: %p<%s> clear key map entry", __func__, 1313 ni, ether_sprintf(ni->ni_macaddr)); 1314 nt->nt_keyixmap[keyix] = NULL; 1315 ieee80211_node_decref(ni); /* XXX needed? */ 1316 _ieee80211_free_node(ni); 1317 } 1318 } 1319 IEEE80211_NODE_UNLOCK(nt); 1320 } else { 1321 if (ieee80211_node_dectestref(ni)) 1322 _ieee80211_free_node(ni); 1323 } 1324} 1325 1326/* 1327 * Reclaim a unicast key and clear any key cache state. 1328 */ 1329int 1330ieee80211_node_delucastkey(struct ieee80211_node *ni) 1331{ 1332 struct ieee80211com *ic = ni->ni_ic; 1333 struct ieee80211_node_table *nt = &ic->ic_sta; 1334 struct ieee80211_node *nikey; 1335 ieee80211_keyix keyix; 1336 int isowned, status; 1337 1338 /* 1339 * NB: We must beware of LOR here; deleting the key 1340 * can cause the crypto layer to block traffic updates 1341 * which can generate a LOR against the node table lock; 1342 * grab it here and stash the key index for our use below. 1343 * 1344 * Must also beware of recursion on the node table lock. 1345 * When called from node_cleanup we may already have 1346 * the node table lock held. Unfortunately there's no 1347 * way to separate out this path so we must do this 1348 * conditionally. 1349 */ 1350 isowned = IEEE80211_NODE_IS_LOCKED(nt); 1351 if (!isowned) 1352 IEEE80211_NODE_LOCK(nt); 1353 keyix = ni->ni_ucastkey.wk_rxkeyix; 1354 status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 1355 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1356 nikey = nt->nt_keyixmap[keyix]; 1357 nt->nt_keyixmap[keyix] = NULL;; 1358 } else 1359 nikey = NULL; 1360 if (!isowned) 1361 IEEE80211_NODE_UNLOCK(&ic->ic_sta); 1362 1363 if (nikey != NULL) { 1364 KASSERT(nikey == ni, 1365 ("key map out of sync, ni %p nikey %p", ni, nikey)); 1366 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1367 "%s: delete key map entry %p<%s> refcnt %d\n", 1368 __func__, ni, ether_sprintf(ni->ni_macaddr), 1369 ieee80211_node_refcnt(ni)-1); 1370 ieee80211_free_node(ni); 1371 } 1372 return status; 1373} 1374 1375/* 1376 * Reclaim a node. If this is the last reference count then 1377 * do the normal free work. Otherwise remove it from the node 1378 * table and mark it gone by clearing the back-reference. 1379 */ 1380static void 1381node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1382{ 1383 ieee80211_keyix keyix; 1384 1385 IEEE80211_NODE_LOCK_ASSERT(nt); 1386 1387 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1388 "%s: remove %p<%s> from %s table, refcnt %d\n", 1389 __func__, ni, ether_sprintf(ni->ni_macaddr), 1390 nt->nt_name, ieee80211_node_refcnt(ni)-1); 1391 /* 1392 * Clear any entry in the unicast key mapping table. 1393 * We need to do it here so rx lookups don't find it 1394 * in the mapping table even if it's not in the hash 1395 * table. We cannot depend on the mapping table entry 1396 * being cleared because the node may not be free'd. 1397 */ 1398 keyix = ni->ni_ucastkey.wk_rxkeyix; 1399 if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1400 nt->nt_keyixmap[keyix] == ni) { 1401 IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1402 "%s: %p<%s> clear key map entry\n", 1403 __func__, ni, ether_sprintf(ni->ni_macaddr)); 1404 nt->nt_keyixmap[keyix] = NULL; 1405 ieee80211_node_decref(ni); /* NB: don't need free */ 1406 } 1407 if (!ieee80211_node_dectestref(ni)) { 1408 /* 1409 * Other references are present, just remove the 1410 * node from the table so it cannot be found. When 1411 * the references are dropped storage will be 1412 * reclaimed. 1413 */ 1414 TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1415 LIST_REMOVE(ni, ni_hash); 1416 ni->ni_table = NULL; /* clear reference */ 1417 } else 1418 _ieee80211_free_node(ni); 1419} 1420 1421static void 1422ieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1423{ 1424 struct ieee80211com *ic = nt->nt_ic; 1425 struct ieee80211_node *ni; 1426 1427 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1428 "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1429 1430 while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1431 if (ni->ni_associd != 0) { 1432 if (ic->ic_auth->ia_node_leave != NULL) 1433 ic->ic_auth->ia_node_leave(ic, ni); 1434 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1435 } 1436 node_reclaim(nt, ni); 1437 } 1438} 1439 1440/* 1441 * Timeout inactive stations and do related housekeeping. 1442 * Note that we cannot hold the node lock while sending a 1443 * frame as this would lead to a LOR. Instead we use a 1444 * generation number to mark nodes that we've scanned and 1445 * drop the lock and restart a scan if we have to time out 1446 * a node. Since we are single-threaded by virtue of 1447 * controlling the inactivity timer we can be sure this will 1448 * process each node only once. 1449 */ 1450static void 1451ieee80211_timeout_stations(struct ieee80211_node_table *nt) 1452{ 1453 struct ieee80211com *ic = nt->nt_ic; 1454 struct ieee80211_node *ni; 1455 u_int gen; 1456 int isadhoc; 1457 1458 isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS || 1459 ic->ic_opmode == IEEE80211_M_AHDEMO); 1460 IEEE80211_SCAN_LOCK(nt); 1461 gen = ++nt->nt_scangen; 1462restart: 1463 IEEE80211_NODE_LOCK(nt); 1464 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1465 if (ni->ni_scangen == gen) /* previously handled */ 1466 continue; 1467 ni->ni_scangen = gen; 1468 /* 1469 * Ignore entries for which have yet to receive an 1470 * authentication frame. These are transient and 1471 * will be reclaimed when the last reference to them 1472 * goes away (when frame xmits complete). 1473 */ 1474 if ((ic->ic_opmode == IEEE80211_M_HOSTAP || 1475 ic->ic_opmode == IEEE80211_M_STA) && 1476 (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1477 continue; 1478 /* 1479 * Free fragment if not needed anymore 1480 * (last fragment older than 1s). 1481 * XXX doesn't belong here 1482 */ 1483 if (ni->ni_rxfrag[0] != NULL && 1484 ticks > ni->ni_rxfragstamp + hz) { 1485 m_freem(ni->ni_rxfrag[0]); 1486 ni->ni_rxfrag[0] = NULL; 1487 } 1488 if (ni->ni_inact > 0) 1489 ni->ni_inact--; 1490 /* 1491 * Special case ourself; we may be idle for extended periods 1492 * of time and regardless reclaiming our state is wrong. 1493 */ 1494 if (ni == ic->ic_bss) 1495 continue; 1496 if (ni->ni_associd != 0 || isadhoc) { 1497 /* 1498 * Age frames on the power save queue. 1499 */ 1500 if (ieee80211_node_saveq_age(ni) != 0 && 1501 IEEE80211_NODE_SAVEQ_QLEN(ni) == 0 && 1502 ic->ic_set_tim != NULL) 1503 ic->ic_set_tim(ni, 0); 1504 /* 1505 * Probe the station before time it out. We 1506 * send a null data frame which may not be 1507 * universally supported by drivers (need it 1508 * for ps-poll support so it should be...). 1509 * 1510 * XXX don't probe the station unless we've 1511 * received a frame from them (and have 1512 * some idea of the rates they are capable 1513 * of); this will get fixed more properly 1514 * soon with better handling of the rate set. 1515 */ 1516 if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) && 1517 (0 < ni->ni_inact && 1518 ni->ni_inact <= ic->ic_inact_probe) && 1519 ni->ni_rates.rs_nrates != 0) { 1520 IEEE80211_NOTE(ic, 1521 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1522 ni, "%s", 1523 "probe station due to inactivity"); 1524 /* 1525 * Grab a reference before unlocking the table 1526 * so the node cannot be reclaimed before we 1527 * send the frame. ieee80211_send_nulldata 1528 * understands we've done this and reclaims the 1529 * ref for us as needed. 1530 */ 1531 ieee80211_ref_node(ni); 1532 IEEE80211_NODE_UNLOCK(nt); 1533 ieee80211_send_nulldata(ni); 1534 /* XXX stat? */ 1535 goto restart; 1536 } 1537 } 1538 if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) && 1539 ni->ni_inact <= 0) { 1540 IEEE80211_NOTE(ic, 1541 IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1542 "station timed out due to inactivity " 1543 "(refcnt %u)", ieee80211_node_refcnt(ni)); 1544 /* 1545 * Send a deauthenticate frame and drop the station. 1546 * This is somewhat complicated due to reference counts 1547 * and locking. At this point a station will typically 1548 * have a reference count of 1. ieee80211_node_leave 1549 * will do a "free" of the node which will drop the 1550 * reference count. But in the meantime a reference 1551 * wil be held by the deauth frame. The actual reclaim 1552 * of the node will happen either after the tx is 1553 * completed or by ieee80211_node_leave. 1554 * 1555 * Separately we must drop the node lock before sending 1556 * in case the driver takes a lock, as this can result 1557 * in a LOR between the node lock and the driver lock. 1558 */ 1559 ieee80211_ref_node(ni); 1560 IEEE80211_NODE_UNLOCK(nt); 1561 if (ni->ni_associd != 0) { 1562 IEEE80211_SEND_MGMT(ic, ni, 1563 IEEE80211_FC0_SUBTYPE_DEAUTH, 1564 IEEE80211_REASON_AUTH_EXPIRE); 1565 } 1566 ieee80211_node_leave(ic, ni); 1567 ieee80211_free_node(ni); 1568 ic->ic_stats.is_node_timeout++; 1569 goto restart; 1570 } 1571 } 1572 IEEE80211_NODE_UNLOCK(nt); 1573 1574 IEEE80211_SCAN_UNLOCK(nt); 1575} 1576 1577void 1578ieee80211_node_timeout(void *arg) 1579{ 1580 struct ieee80211com *ic = arg; 1581 1582 ieee80211_scan_timeout(ic); 1583 ieee80211_timeout_stations(&ic->ic_sta); 1584 1585 IEEE80211_LOCK(ic); 1586 ieee80211_erp_timeout(ic); 1587 ieee80211_ht_timeout(ic); 1588 IEEE80211_UNLOCK(ic); 1589 1590 callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 1591 ieee80211_node_timeout, ic); 1592} 1593 1594void 1595ieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1596{ 1597 struct ieee80211_node *ni; 1598 u_int gen; 1599 1600 IEEE80211_SCAN_LOCK(nt); 1601 gen = ++nt->nt_scangen; 1602restart: 1603 IEEE80211_NODE_LOCK(nt); 1604 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1605 if (ni->ni_scangen != gen) { 1606 ni->ni_scangen = gen; 1607 (void) ieee80211_ref_node(ni); 1608 IEEE80211_NODE_UNLOCK(nt); 1609 (*f)(arg, ni); 1610 ieee80211_free_node(ni); 1611 goto restart; 1612 } 1613 } 1614 IEEE80211_NODE_UNLOCK(nt); 1615 1616 IEEE80211_SCAN_UNLOCK(nt); 1617} 1618 1619void 1620ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1621{ 1622 printf("0x%p: mac %s refcnt %d\n", ni, 1623 ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1624 printf("\tscangen %u authmode %u flags 0x%x\n", 1625 ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1626 printf("\tassocid 0x%x txpower %u vlan %u\n", 1627 ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1628 printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1629 ni->ni_txseqs[IEEE80211_NONQOS_TID], 1630 ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 1631 ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 1632 ni->ni_rxfragstamp); 1633 printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 1634 ni->ni_rstamp, ni->ni_rssi, ni->ni_noise, 1635 ni->ni_intval, ni->ni_capinfo); 1636 printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1637 ether_sprintf(ni->ni_bssid), 1638 ni->ni_esslen, ni->ni_essid, 1639 ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 1640 printf("\tfails %u inact %u txrate %u\n", 1641 ni->ni_fails, ni->ni_inact, ni->ni_txrate); 1642 printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 1643 ni->ni_htcap, ni->ni_htparam, 1644 ni->ni_htctlchan, ni->ni_ht2ndchan); 1645 printf("\thtopmode %x htstbc %x chw %u\n", 1646 ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 1647} 1648 1649void 1650ieee80211_dump_nodes(struct ieee80211_node_table *nt) 1651{ 1652 ieee80211_iterate_nodes(nt, 1653 (ieee80211_iter_func *) ieee80211_dump_node, nt); 1654} 1655 1656void 1657ieee80211_notify_erp(struct ieee80211com *ic) 1658{ 1659 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 1660 ieee80211_beacon_notify(ic, IEEE80211_BEACON_ERP); 1661} 1662 1663/* 1664 * Handle a station joining an 11g network. 1665 */ 1666static void 1667ieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1668{ 1669 1670 IEEE80211_LOCK_ASSERT(ic); 1671 1672 /* 1673 * Station isn't capable of short slot time. Bump 1674 * the count of long slot time stations and disable 1675 * use of short slot time. Note that the actual switch 1676 * over to long slot time use may not occur until the 1677 * next beacon transmission (per sec. 7.3.1.4 of 11g). 1678 */ 1679 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1680 ic->ic_longslotsta++; 1681 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1682 "station needs long slot time, count %d", 1683 ic->ic_longslotsta); 1684 /* XXX vap's w/ conflicting needs won't work */ 1685 if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 1686 /* 1687 * Don't force slot time when switched to turbo 1688 * mode as non-ERP stations won't be present; this 1689 * need only be done when on the normal G channel. 1690 */ 1691 ieee80211_set_shortslottime(ic, 0); 1692 } 1693 } 1694 /* 1695 * If the new station is not an ERP station 1696 * then bump the counter and enable protection 1697 * if configured. 1698 */ 1699 if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 1700 ic->ic_nonerpsta++; 1701 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1702 "station is !ERP, %d non-ERP stations associated", 1703 ic->ic_nonerpsta); 1704 /* 1705 * If station does not support short preamble 1706 * then we must enable use of Barker preamble. 1707 */ 1708 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 1709 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1710 "%s", "station needs long preamble"); 1711 ic->ic_flags |= IEEE80211_F_USEBARKER; 1712 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1713 } 1714 /* 1715 * If protection is configured, enable it. 1716 */ 1717 if (ic->ic_protmode != IEEE80211_PROT_NONE && 1718 ic->ic_nonerpsta == 1 && 1719 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 1720 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1721 "%s: enable use of protection\n", __func__); 1722 ic->ic_flags |= IEEE80211_F_USEPROT; 1723 ieee80211_notify_erp(ic); 1724 } 1725 } else 1726 ni->ni_flags |= IEEE80211_NODE_ERP; 1727} 1728 1729void 1730ieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 1731{ 1732 int newassoc; 1733 1734 if (ni->ni_associd == 0) { 1735 uint16_t aid; 1736 1737 IEEE80211_LOCK(ic); 1738 /* 1739 * It would be good to search the bitmap 1740 * more efficiently, but this will do for now. 1741 */ 1742 for (aid = 1; aid < ic->ic_max_aid; aid++) { 1743 if (!IEEE80211_AID_ISSET(aid, 1744 ic->ic_aid_bitmap)) 1745 break; 1746 } 1747 if (aid >= ic->ic_max_aid) { 1748 IEEE80211_UNLOCK(ic); 1749 IEEE80211_SEND_MGMT(ic, ni, resp, 1750 IEEE80211_REASON_ASSOC_TOOMANY); 1751 ieee80211_node_leave(ic, ni); 1752 return; 1753 } 1754 ni->ni_associd = aid | 0xc000; 1755 ni->ni_jointime = time_uptime; 1756 IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 1757 ic->ic_sta_assoc++; 1758 1759 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 1760 ieee80211_ht_node_join(ni); 1761 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1762 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 1763 ieee80211_node_join_11g(ic, ni); 1764 IEEE80211_UNLOCK(ic); 1765 1766 newassoc = 1; 1767 } else 1768 newassoc = 0; 1769 1770 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 1771 "station %sassociated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s", 1772 newassoc ? "" : "re", 1773 IEEE80211_NODE_AID(ni), 1774 ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 1775 ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 1776 ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 1777 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1778 ni->ni_flags & IEEE80211_NODE_HT ? 1779 (ni->ni_chw == 20 ? ", HT20" : ", HT40") : "", 1780 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1781 IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_FF) ? 1782 ", fast-frames" : "", 1783 IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_TURBOP) ? 1784 ", turbo" : "" 1785 ); 1786 1787 /* give driver a chance to setup state like ni_txrate */ 1788 if (ic->ic_newassoc != NULL) 1789 ic->ic_newassoc(ni, newassoc); 1790 IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 1791 /* tell the authenticator about new station */ 1792 if (ic->ic_auth->ia_node_join != NULL) 1793 ic->ic_auth->ia_node_join(ic, ni); 1794 ieee80211_notify_node_join(ic, ni, newassoc); 1795} 1796 1797static void 1798disable_protection(struct ieee80211com *ic) 1799{ 1800 KASSERT(ic->ic_nonerpsta == 0 && 1801 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 1802 ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 1803 ic->ic_flags_ext)); 1804 1805 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1806 /* XXX verify mode? */ 1807 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 1808 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1809 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1810 } 1811 ieee80211_notify_erp(ic); 1812} 1813 1814/* 1815 * Handle a station leaving an 11g network. 1816 */ 1817static void 1818ieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1819{ 1820 1821 IEEE80211_LOCK_ASSERT(ic); 1822 1823 KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 1824 ("not in 11g, bss %u:0x%x, curmode %u", ic->ic_bsschan->ic_freq, 1825 ic->ic_bsschan->ic_flags, ic->ic_curmode)); 1826 1827 /* 1828 * If a long slot station do the slot time bookkeeping. 1829 */ 1830 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1831 KASSERT(ic->ic_longslotsta > 0, 1832 ("bogus long slot station count %d", ic->ic_longslotsta)); 1833 ic->ic_longslotsta--; 1834 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1835 "long slot time station leaves, count now %d", 1836 ic->ic_longslotsta); 1837 if (ic->ic_longslotsta == 0) { 1838 /* 1839 * Re-enable use of short slot time if supported 1840 * and not operating in IBSS mode (per spec). 1841 */ 1842 if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 1843 ic->ic_opmode != IEEE80211_M_IBSS) { 1844 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1845 "%s: re-enable use of short slot time\n", 1846 __func__); 1847 ieee80211_set_shortslottime(ic, 1); 1848 } 1849 } 1850 } 1851 /* 1852 * If a non-ERP station do the protection-related bookkeeping. 1853 */ 1854 if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 1855 KASSERT(ic->ic_nonerpsta > 0, 1856 ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 1857 ic->ic_nonerpsta--; 1858 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1859 "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 1860 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 1861 " (non-ERP sta present)" : ""); 1862 if (ic->ic_nonerpsta == 0 && 1863 (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 1864 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1865 "%s: disable use of protection\n", __func__); 1866 disable_protection(ic); 1867 } 1868 } 1869} 1870 1871/* 1872 * Time out presence of an overlapping bss with non-ERP 1873 * stations. When operating in hostap mode we listen for 1874 * beacons from other stations and if we identify a non-ERP 1875 * station is present we enable protection. To identify 1876 * when all non-ERP stations are gone we time out this 1877 * condition. 1878 */ 1879static void 1880ieee80211_erp_timeout(struct ieee80211com *ic) 1881{ 1882 1883 IEEE80211_LOCK_ASSERT(ic); 1884 1885 if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 1886 time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 1887 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1888 "%s\n", "age out non-ERP sta present on channel"); 1889 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 1890 if (ic->ic_nonerpsta == 0) 1891 disable_protection(ic); 1892 } 1893} 1894 1895/* 1896 * Handle bookkeeping for station deauthentication/disassociation 1897 * when operating as an ap. 1898 */ 1899void 1900ieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 1901{ 1902 struct ieee80211_node_table *nt = ni->ni_table; 1903 1904 IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 1905 "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 1906 1907 KASSERT(ic->ic_opmode != IEEE80211_M_STA, 1908 ("unexpected operating mode %u", ic->ic_opmode)); 1909 /* 1910 * If node wasn't previously associated all 1911 * we need to do is reclaim the reference. 1912 */ 1913 /* XXX ibss mode bypasses 11g and notification */ 1914 if (ni->ni_associd == 0) 1915 goto done; 1916 /* 1917 * Tell the authenticator the station is leaving. 1918 * Note that we must do this before yanking the 1919 * association id as the authenticator uses the 1920 * associd to locate it's state block. 1921 */ 1922 if (ic->ic_auth->ia_node_leave != NULL) 1923 ic->ic_auth->ia_node_leave(ic, ni); 1924 1925 IEEE80211_LOCK(ic); 1926 IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1927 ni->ni_associd = 0; 1928 ic->ic_sta_assoc--; 1929 1930 if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 1931 ieee80211_ht_node_leave(ni); 1932 if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1933 IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 1934 ieee80211_node_leave_11g(ic, ni); 1935 IEEE80211_UNLOCK(ic); 1936 /* 1937 * Cleanup station state. In particular clear various 1938 * state that might otherwise be reused if the node 1939 * is reused before the reference count goes to zero 1940 * (and memory is reclaimed). 1941 */ 1942 ieee80211_sta_leave(ic, ni); 1943done: 1944 /* 1945 * Remove the node from any table it's recorded in and 1946 * drop the caller's reference. Removal from the table 1947 * is important to insure the node is not reprocessed 1948 * for inactivity. 1949 */ 1950 if (nt != NULL) { 1951 IEEE80211_NODE_LOCK(nt); 1952 node_reclaim(nt, ni); 1953 IEEE80211_NODE_UNLOCK(nt); 1954 } else 1955 ieee80211_free_node(ni); 1956} 1957 1958int8_t 1959ieee80211_getrssi(struct ieee80211com *ic) 1960{ 1961#define NZ(x) ((x) == 0 ? 1 : (x)) 1962 struct ieee80211_node_table *nt = &ic->ic_sta; 1963 int rssi_samples; 1964 int32_t rssi_total; 1965 struct ieee80211_node *ni; 1966 1967 rssi_total = 0; 1968 rssi_samples = 0; 1969 switch (ic->ic_opmode) { 1970 case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 1971 case IEEE80211_M_AHDEMO: /* average of all neighbors */ 1972 case IEEE80211_M_HOSTAP: /* average of all associated stations */ 1973 /* XXX locking */ 1974 TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 1975 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 1976 (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS)) { 1977 int8_t rssi = ic->ic_node_getrssi(ni); 1978 if (rssi != 0) { 1979 rssi_samples++; 1980 rssi_total += rssi; 1981 } 1982 } 1983 break; 1984 case IEEE80211_M_MONITOR: /* XXX */ 1985 case IEEE80211_M_STA: /* use stats from associated ap */ 1986 default: 1987 if (ic->ic_bss != NULL) 1988 rssi_total = ic->ic_node_getrssi(ic->ic_bss); 1989 rssi_samples = 1; 1990 break; 1991 } 1992 return rssi_total / NZ(rssi_samples); 1993#undef NZ 1994} 1995 1996void 1997ieee80211_getsignal(struct ieee80211com *ic, int8_t *rssi, int8_t *noise) 1998{ 1999 2000 if (ic->ic_bss == NULL) /* NB: shouldn't happen */ 2001 return; 2002 ic->ic_node_getsignal(ic->ic_bss, rssi, noise); 2003 /* for non-station mode return avg'd rssi accounting */ 2004 if (ic->ic_opmode != IEEE80211_M_STA) 2005 *rssi = ieee80211_getrssi(ic); 2006} 2007 2008/* 2009 * Node table support. 2010 */ 2011 2012static void 2013ieee80211_node_table_init(struct ieee80211com *ic, 2014 struct ieee80211_node_table *nt, 2015 const char *name, int inact, int keyixmax) 2016{ 2017 2018 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 2019 "%s %s table, inact %u\n", __func__, name, inact); 2020 2021 nt->nt_ic = ic; 2022 /* XXX need unit */ 2023 IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2024 IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2025 TAILQ_INIT(&nt->nt_node); 2026 nt->nt_name = name; 2027 nt->nt_scangen = 1; 2028 nt->nt_inact_init = inact; 2029 nt->nt_keyixmax = keyixmax; 2030 if (nt->nt_keyixmax > 0) { 2031 MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 2032 keyixmax * sizeof(struct ieee80211_node *), 2033 M_80211_NODE, M_NOWAIT | M_ZERO); 2034 if (nt->nt_keyixmap == NULL) 2035 if_printf(ic->ic_ifp, 2036 "Cannot allocate key index map with %u entries\n", 2037 keyixmax); 2038 } else 2039 nt->nt_keyixmap = NULL; 2040} 2041 2042static void 2043ieee80211_node_table_reset(struct ieee80211_node_table *nt) 2044{ 2045 2046 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2047 "%s %s table\n", __func__, nt->nt_name); 2048 2049 IEEE80211_NODE_LOCK(nt); 2050 ieee80211_free_allnodes_locked(nt); 2051 IEEE80211_NODE_UNLOCK(nt); 2052} 2053 2054static void 2055ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2056{ 2057 2058 IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2059 "%s %s table\n", __func__, nt->nt_name); 2060 2061 IEEE80211_NODE_LOCK(nt); 2062 ieee80211_free_allnodes_locked(nt); 2063 if (nt->nt_keyixmap != NULL) { 2064 /* XXX verify all entries are NULL */ 2065 int i; 2066 for (i = 0; i < nt->nt_keyixmax; i++) 2067 if (nt->nt_keyixmap[i] != NULL) 2068 printf("%s: %s[%u] still active\n", __func__, 2069 nt->nt_name, i); 2070 FREE(nt->nt_keyixmap, M_80211_NODE); 2071 nt->nt_keyixmap = NULL; 2072 } 2073 IEEE80211_SCAN_LOCK_DESTROY(nt); 2074 IEEE80211_NODE_LOCK_DESTROY(nt); 2075} 2076