ieee80211_node.c revision 184210
1116742Ssam/*- 2116904Ssam * Copyright (c) 2001 Atsushi Onoe 3178354Ssam * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 4116742Ssam * All rights reserved. 5116742Ssam * 6116742Ssam * Redistribution and use in source and binary forms, with or without 7116742Ssam * modification, are permitted provided that the following conditions 8116742Ssam * are met: 9116742Ssam * 1. Redistributions of source code must retain the above copyright 10116904Ssam * notice, this list of conditions and the following disclaimer. 11116904Ssam * 2. Redistributions in binary form must reproduce the above copyright 12116904Ssam * notice, this list of conditions and the following disclaimer in the 13116904Ssam * documentation and/or other materials provided with the distribution. 14116742Ssam * 15116904Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16116904Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17116904Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18116904Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19116904Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20116904Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21116904Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22116904Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23116904Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24116904Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25116742Ssam */ 26116742Ssam 27116742Ssam#include <sys/cdefs.h> 28116742Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_node.c 184210 2008-10-23 19:57:13Z des $"); 29116742Ssam 30178354Ssam#include "opt_wlan.h" 31178354Ssam 32116742Ssam#include <sys/param.h> 33116742Ssam#include <sys/systm.h> 34116742Ssam#include <sys/mbuf.h> 35116742Ssam#include <sys/malloc.h> 36116742Ssam#include <sys/kernel.h> 37138568Ssam 38116742Ssam#include <sys/socket.h> 39116742Ssam 40116742Ssam#include <net/if.h> 41116742Ssam#include <net/if_media.h> 42116742Ssam#include <net/ethernet.h> 43116742Ssam 44116742Ssam#include <net80211/ieee80211_var.h> 45178354Ssam#include <net80211/ieee80211_input.h> 46178354Ssam#include <net80211/ieee80211_wds.h> 47116742Ssam 48116742Ssam#include <net/bpf.h> 49116742Ssam 50147221Ssam/* 51147221Ssam * Association id's are managed with a bit vector. 52147221Ssam */ 53178354Ssam#define IEEE80211_AID_SET(_vap, b) \ 54178354Ssam ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ 55178354Ssam (1 << (IEEE80211_AID(b) % 32))) 56178354Ssam#define IEEE80211_AID_CLR(_vap, b) \ 57178354Ssam ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ 58178354Ssam ~(1 << (IEEE80211_AID(b) % 32))) 59178354Ssam#define IEEE80211_AID_ISSET(_vap, b) \ 60178354Ssam ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 61147221Ssam 62159139Sdds#ifdef IEEE80211_DEBUG_REFCNT 63159139Sdds#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 64159139Sdds#else 65159139Sdds#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 66159139Sdds#endif 67159139Sdds 68170530Ssamstatic int ieee80211_sta_join1(struct ieee80211_node *); 69170530Ssam 70179643Ssamstatic struct ieee80211_node *node_alloc(struct ieee80211vap *, 71179643Ssam const uint8_t [IEEE80211_ADDR_LEN]); 72138568Ssamstatic void node_cleanup(struct ieee80211_node *); 73138568Ssamstatic void node_free(struct ieee80211_node *); 74178354Ssamstatic void node_age(struct ieee80211_node *); 75170530Ssamstatic int8_t node_getrssi(const struct ieee80211_node *); 76170530Ssamstatic void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 77178354Ssamstatic void node_getmimoinfo(const struct ieee80211_node *, 78178354Ssam struct ieee80211_mimo_info *); 79116742Ssam 80138568Ssamstatic void _ieee80211_free_node(struct ieee80211_node *); 81120104Ssam 82138568Ssamstatic void ieee80211_node_table_init(struct ieee80211com *ic, 83148863Ssam struct ieee80211_node_table *nt, const char *name, 84170530Ssam int inact, int keymaxix); 85178354Ssamstatic void ieee80211_node_table_reset(struct ieee80211_node_table *, 86178354Ssam struct ieee80211vap *); 87178354Ssamstatic void ieee80211_node_reclaim(struct ieee80211_node *); 88138568Ssamstatic void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 89172211Ssamstatic void ieee80211_erp_timeout(struct ieee80211com *); 90138568Ssam 91127876SsamMALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 92178354SsamMALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); 93120481Ssam 94116742Ssamvoid 95138568Ssamieee80211_node_attach(struct ieee80211com *ic) 96116742Ssam{ 97178354Ssam ieee80211_node_table_init(ic, &ic->ic_sta, "station", 98178354Ssam IEEE80211_INACT_INIT, ic->ic_max_keyix); 99178354Ssam callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 100178354Ssam callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 101178354Ssam ieee80211_node_timeout, ic); 102116742Ssam 103138568Ssam ic->ic_node_alloc = node_alloc; 104138568Ssam ic->ic_node_free = node_free; 105138568Ssam ic->ic_node_cleanup = node_cleanup; 106178354Ssam ic->ic_node_age = node_age; 107178354Ssam ic->ic_node_drain = node_age; /* NB: same as age */ 108138568Ssam ic->ic_node_getrssi = node_getrssi; 109170530Ssam ic->ic_node_getsignal = node_getsignal; 110178354Ssam ic->ic_node_getmimoinfo = node_getmimoinfo; 111138568Ssam 112178354Ssam /* 113178354Ssam * Set flags to be propagated to all vap's; 114178354Ssam * these define default behaviour/configuration. 115178354Ssam */ 116178354Ssam ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 117178354Ssam} 118138568Ssam 119178354Ssamvoid 120178354Ssamieee80211_node_detach(struct ieee80211com *ic) 121178354Ssam{ 122170530Ssam 123178354Ssam callout_drain(&ic->ic_inact); 124178354Ssam ieee80211_node_table_cleanup(&ic->ic_sta); 125178354Ssam} 126172062Ssam 127178354Ssamvoid 128178354Ssamieee80211_node_vattach(struct ieee80211vap *vap) 129178354Ssam{ 130178354Ssam /* NB: driver can override */ 131178354Ssam vap->iv_max_aid = IEEE80211_AID_DEF; 132178354Ssam 133178354Ssam /* default station inactivity timer setings */ 134178354Ssam vap->iv_inact_init = IEEE80211_INACT_INIT; 135178354Ssam vap->iv_inact_auth = IEEE80211_INACT_AUTH; 136178354Ssam vap->iv_inact_run = IEEE80211_INACT_RUN; 137178354Ssam vap->iv_inact_probe = IEEE80211_INACT_PROBE; 138148863Ssam} 139148863Ssam 140148863Ssamvoid 141178354Ssamieee80211_node_latevattach(struct ieee80211vap *vap) 142148863Ssam{ 143178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 144178354Ssam /* XXX should we allow max aid to be zero? */ 145178354Ssam if (vap->iv_max_aid < IEEE80211_AID_MIN) { 146178354Ssam vap->iv_max_aid = IEEE80211_AID_MIN; 147178354Ssam if_printf(vap->iv_ifp, 148178354Ssam "WARNING: max aid too small, changed to %d\n", 149178354Ssam vap->iv_max_aid); 150178354Ssam } 151184210Sdes MALLOC(vap->iv_aid_bitmap, uint32_t *, 152184210Sdes howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), 153178354Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 154178354Ssam if (vap->iv_aid_bitmap == NULL) { 155178354Ssam /* XXX no way to recover */ 156178354Ssam printf("%s: no memory for AID bitmap, max aid %d!\n", 157178354Ssam __func__, vap->iv_max_aid); 158178354Ssam vap->iv_max_aid = 0; 159178354Ssam } 160138568Ssam } 161138568Ssam 162178354Ssam ieee80211_reset_bss(vap); 163118887Ssam 164178354Ssam vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); 165116742Ssam} 166116742Ssam 167116742Ssamvoid 168178354Ssamieee80211_node_vdetach(struct ieee80211vap *vap) 169116742Ssam{ 170178354Ssam struct ieee80211com *ic = vap->iv_ic; 171116742Ssam 172178354Ssam ieee80211_node_table_reset(&ic->ic_sta, vap); 173178354Ssam if (vap->iv_bss != NULL) { 174178354Ssam ieee80211_free_node(vap->iv_bss); 175178354Ssam vap->iv_bss = NULL; 176138568Ssam } 177178354Ssam if (vap->iv_aid_bitmap != NULL) { 178184210Sdes FREE(vap->iv_aid_bitmap, M_80211_NODE); 179178354Ssam vap->iv_aid_bitmap = NULL; 180138568Ssam } 181116742Ssam} 182116742Ssam 183138568Ssam/* 184138568Ssam * Port authorize/unauthorize interfaces for use by an authenticator. 185138568Ssam */ 186138568Ssam 187138568Ssamvoid 188148302Ssamieee80211_node_authorize(struct ieee80211_node *ni) 189138568Ssam{ 190138568Ssam ni->ni_flags |= IEEE80211_NODE_AUTH; 191178354Ssam ni->ni_inact_reload = ni->ni_vap->iv_inact_run; 192172062Ssam ni->ni_inact = ni->ni_inact_reload; 193138568Ssam} 194138568Ssam 195138568Ssamvoid 196148302Ssamieee80211_node_unauthorize(struct ieee80211_node *ni) 197138568Ssam{ 198138568Ssam ni->ni_flags &= ~IEEE80211_NODE_AUTH; 199178354Ssam ni->ni_inact_reload = ni->ni_vap->iv_inact_auth; 200172062Ssam if (ni->ni_inact > ni->ni_inact_reload) 201172062Ssam ni->ni_inact = ni->ni_inact_reload; 202138568Ssam} 203138568Ssam 204116742Ssam/* 205183251Ssam * Fix tx parameters for a node according to ``association state''. 206183251Ssam */ 207183251Ssamstatic void 208183251Ssamnode_setuptxparms(struct ieee80211_node *ni) 209183251Ssam{ 210183251Ssam struct ieee80211vap *vap = ni->ni_vap; 211183251Ssam 212183251Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 213183251Ssam if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) 214183251Ssam ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11NA]; 215183251Ssam else 216183251Ssam ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11NG]; 217183251Ssam } else { /* legacy rate handling */ 218183251Ssam if (IEEE80211_IS_CHAN_A(ni->ni_chan)) 219183251Ssam ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11A]; 220183251Ssam else if (ni->ni_flags & IEEE80211_NODE_ERP) 221183251Ssam ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11G]; 222183251Ssam else 223183251Ssam ni->ni_txparms = &vap->iv_txparms[IEEE80211_MODE_11B]; 224183251Ssam } 225183251Ssam} 226183251Ssam 227183251Ssam/* 228138568Ssam * Set/change the channel. The rate set is also updated as 229138568Ssam * to insure a consistent view by drivers. 230178354Ssam * XXX should be private but hostap needs it to deal with CSA 231138568Ssam */ 232178354Ssamvoid 233178354Ssamieee80211_node_set_chan(struct ieee80211_node *ni, 234178354Ssam struct ieee80211_channel *chan) 235138568Ssam{ 236178354Ssam struct ieee80211com *ic = ni->ni_ic; 237183251Ssam struct ieee80211vap *vap = ni->ni_vap; 238183251Ssam enum ieee80211_phymode mode; 239170530Ssam 240178354Ssam KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); 241178354Ssam 242138568Ssam ni->ni_chan = chan; 243183251Ssam mode = ieee80211_chan2mode(chan); 244170530Ssam if (IEEE80211_IS_CHAN_HT(chan)) { 245170530Ssam /* 246170530Ssam * XXX Gotta be careful here; the rate set returned by 247170530Ssam * ieee80211_get_suprates is actually any HT rate 248170530Ssam * set so blindly copying it will be bad. We must 249170530Ssam * install the legacy rate est in ni_rates and the 250170530Ssam * HT rate set in ni_htrates. 251170530Ssam */ 252170530Ssam ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 253183251Ssam /* 254183251Ssam * Setup bss tx parameters based on operating mode. We 255183251Ssam * use legacy rates when operating in a mixed HT+non-HT bss 256183251Ssam * and non-ERP rates in 11g for mixed ERP+non-ERP bss. 257183251Ssam */ 258183251Ssam if (mode == IEEE80211_MODE_11NA && 259183251Ssam (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0) 260183251Ssam mode = IEEE80211_MODE_11A; 261183251Ssam else if (mode == IEEE80211_MODE_11NG && 262183251Ssam (vap->iv_flags_ext & IEEE80211_FEXT_PUREN) == 0) 263183251Ssam mode = IEEE80211_MODE_11G; 264183251Ssam if (mode == IEEE80211_MODE_11G && 265183251Ssam (vap->iv_flags & IEEE80211_F_PUREG) == 0) 266183251Ssam mode = IEEE80211_MODE_11B; 267170530Ssam } 268183251Ssam ni->ni_txparms = &vap->iv_txparms[mode]; 269165569Ssam ni->ni_rates = *ieee80211_get_suprates(ic, chan); 270138568Ssam} 271138568Ssam 272141658Ssamstatic __inline void 273141658Ssamcopy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 274141658Ssam{ 275141658Ssam /* propagate useful state */ 276141658Ssam nbss->ni_authmode = obss->ni_authmode; 277141658Ssam nbss->ni_txpower = obss->ni_txpower; 278141658Ssam nbss->ni_vlan = obss->ni_vlan; 279141658Ssam /* XXX statistics? */ 280178354Ssam /* XXX legacy WDS bssid? */ 281141658Ssam} 282141658Ssam 283116742Ssamvoid 284178354Ssamieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) 285116742Ssam{ 286178354Ssam struct ieee80211com *ic = vap->iv_ic; 287116742Ssam struct ieee80211_node *ni; 288116742Ssam 289178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, 290178354Ssam "%s: creating ibss on channel %u\n", __func__, 291178354Ssam ieee80211_chan2ieee(ic, chan)); 292138568Ssam 293178354Ssam ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 294140753Ssam if (ni == NULL) { 295140753Ssam /* XXX recovery? */ 296138568Ssam return; 297138568Ssam } 298178354Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 299178354Ssam ni->ni_esslen = vap->iv_des_ssid[0].len; 300178354Ssam memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 301178354Ssam if (vap->iv_bss != NULL) 302178354Ssam copy_bss(ni, vap->iv_bss); 303148843Ssam ni->ni_intval = ic->ic_bintval; 304178354Ssam if (vap->iv_flags & IEEE80211_F_PRIVACY) 305116742Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 306116742Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 307116742Ssam ni->ni_fhdwell = 200; /* XXX */ 308116742Ssam ni->ni_fhindex = 1; 309116742Ssam } 310178354Ssam if (vap->iv_opmode == IEEE80211_M_IBSS) { 311178354Ssam vap->iv_flags |= IEEE80211_F_SIBSS; 312138568Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 313178354Ssam if (vap->iv_flags & IEEE80211_F_DESBSSID) 314178354Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 315167282Ssam else { 316167282Ssam get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 317167282Ssam /* clear group bit, add local bit */ 318167282Ssam ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 319167282Ssam } 320178354Ssam } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 321178354Ssam if (vap->iv_flags & IEEE80211_F_DESBSSID) 322178354Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); 323153403Ssam else 324153403Ssam memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 325138568Ssam } 326138568Ssam /* 327138568Ssam * Fix the channel and related attributes. 328138568Ssam */ 329178354Ssam /* clear DFS CAC state on previous channel */ 330178354Ssam if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 331178354Ssam ic->ic_bsschan->ic_freq != chan->ic_freq && 332178354Ssam IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) 333178354Ssam ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); 334170530Ssam ic->ic_bsschan = chan; 335178354Ssam ieee80211_node_set_chan(ni, chan); 336170530Ssam ic->ic_curmode = ieee80211_chan2mode(chan); 337138568Ssam /* 338178354Ssam * Do mode-specific setup. 339138568Ssam */ 340170530Ssam if (IEEE80211_IS_CHAN_FULL(chan)) { 341170530Ssam if (IEEE80211_IS_CHAN_ANYG(chan)) { 342170530Ssam /* 343178354Ssam * Use a mixed 11b/11g basic rate set. 344170530Ssam */ 345178354Ssam ieee80211_setbasicrates(&ni->ni_rates, 346178354Ssam IEEE80211_MODE_11G); 347178354Ssam if (vap->iv_flags & IEEE80211_F_PUREG) { 348178354Ssam /* 349178354Ssam * Also mark OFDM rates basic so 11b 350178354Ssam * stations do not join (WiFi compliance). 351178354Ssam */ 352178354Ssam ieee80211_addbasicrates(&ni->ni_rates, 353178354Ssam IEEE80211_MODE_11A); 354178354Ssam } 355170530Ssam } else if (IEEE80211_IS_CHAN_B(chan)) { 356170530Ssam /* 357170530Ssam * Force pure 11b rate set. 358170530Ssam */ 359178354Ssam ieee80211_setbasicrates(&ni->ni_rates, 360170530Ssam IEEE80211_MODE_11B); 361170530Ssam } 362170530Ssam } 363138568Ssam 364170530Ssam (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 365116742Ssam} 366116742Ssam 367170530Ssam/* 368170530Ssam * Reset bss state on transition to the INIT state. 369170530Ssam * Clear any stations from the table (they have been 370170530Ssam * deauth'd) and reset the bss node (clears key, rate 371170530Ssam * etc. state). 372170530Ssam */ 373138568Ssamvoid 374178354Ssamieee80211_reset_bss(struct ieee80211vap *vap) 375138568Ssam{ 376178354Ssam struct ieee80211com *ic = vap->iv_ic; 377138568Ssam struct ieee80211_node *ni, *obss; 378138568Ssam 379178354Ssam ieee80211_node_table_reset(&ic->ic_sta, vap); 380178354Ssam /* XXX multi-bss: wrong */ 381170530Ssam ieee80211_reset_erp(ic); 382140753Ssam 383178354Ssam ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); 384138568Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 385178354Ssam obss = vap->iv_bss; 386178354Ssam vap->iv_bss = ieee80211_ref_node(ni); 387141658Ssam if (obss != NULL) { 388141658Ssam copy_bss(ni, obss); 389148843Ssam ni->ni_intval = ic->ic_bintval; 390138568Ssam ieee80211_free_node(obss); 391178354Ssam } else 392178354Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); 393138568Ssam} 394138568Ssam 395170530Ssamstatic int 396170530Ssammatch_ssid(const struct ieee80211_node *ni, 397170530Ssam int nssid, const struct ieee80211_scan_ssid ssids[]) 398170530Ssam{ 399170530Ssam int i; 400148432Ssam 401170530Ssam for (i = 0; i < nssid; i++) { 402170530Ssam if (ni->ni_esslen == ssids[i].len && 403170530Ssam memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 404170530Ssam return 1; 405170530Ssam } 406170530Ssam return 0; 407170530Ssam} 408170530Ssam 409170530Ssam/* 410170530Ssam * Test a node for suitability/compatibility. 411170530Ssam */ 412127767Ssamstatic int 413178354Ssamcheck_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) 414127767Ssam{ 415178354Ssam struct ieee80211com *ic = ni->ni_ic; 416170530Ssam uint8_t rate; 417170530Ssam 418170530Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 419170530Ssam return 0; 420178354Ssam if (vap->iv_opmode == IEEE80211_M_IBSS) { 421170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 422170530Ssam return 0; 423170530Ssam } else { 424170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 425170530Ssam return 0; 426170530Ssam } 427178354Ssam if (vap->iv_flags & IEEE80211_F_PRIVACY) { 428170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 429170530Ssam return 0; 430170530Ssam } else { 431170530Ssam /* XXX does this mean privacy is supported or required? */ 432170530Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 433170530Ssam return 0; 434170530Ssam } 435170530Ssam rate = ieee80211_fix_rate(ni, &ni->ni_rates, 436170530Ssam IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 437170530Ssam if (rate & IEEE80211_RATE_BASIC) 438170530Ssam return 0; 439178354Ssam if (vap->iv_des_nssid != 0 && 440178354Ssam !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 441170530Ssam return 0; 442178354Ssam if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 443178354Ssam !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 444170530Ssam return 0; 445170530Ssam return 1; 446170530Ssam} 447170530Ssam 448170530Ssam#ifdef IEEE80211_DEBUG 449170530Ssam/* 450170530Ssam * Display node suitability/compatibility. 451170530Ssam */ 452170530Ssamstatic void 453178354Ssamcheck_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) 454170530Ssam{ 455178354Ssam struct ieee80211com *ic = ni->ni_ic; 456170530Ssam uint8_t rate; 457127767Ssam int fail; 458127767Ssam 459127767Ssam fail = 0; 460127767Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 461127767Ssam fail |= 0x01; 462178354Ssam if (vap->iv_opmode == IEEE80211_M_IBSS) { 463127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 464127767Ssam fail |= 0x02; 465127767Ssam } else { 466127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 467127767Ssam fail |= 0x02; 468127767Ssam } 469178354Ssam if (vap->iv_flags & IEEE80211_F_PRIVACY) { 470127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 471127767Ssam fail |= 0x04; 472127767Ssam } else { 473127767Ssam /* XXX does this mean privacy is supported or required? */ 474127767Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 475127767Ssam fail |= 0x04; 476127767Ssam } 477167442Ssam rate = ieee80211_fix_rate(ni, &ni->ni_rates, 478165887Ssam IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 479127767Ssam if (rate & IEEE80211_RATE_BASIC) 480127767Ssam fail |= 0x08; 481178354Ssam if (vap->iv_des_nssid != 0 && 482178354Ssam !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) 483127767Ssam fail |= 0x10; 484178354Ssam if ((vap->iv_flags & IEEE80211_F_DESBSSID) && 485178354Ssam !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) 486127767Ssam fail |= 0x20; 487127767Ssam 488170530Ssam printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 489170530Ssam printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 490170530Ssam printf(" %3d%c", 491170530Ssam ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 492170530Ssam printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 493170530Ssam fail & 0x08 ? '!' : ' '); 494170530Ssam printf(" %4s%c", 495170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 496170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 497170530Ssam "????", 498170530Ssam fail & 0x02 ? '!' : ' '); 499170530Ssam printf(" %3s%c ", 500170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 501170530Ssam fail & 0x04 ? '!' : ' '); 502170530Ssam ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 503170530Ssam printf("%s\n", fail & 0x10 ? "!" : ""); 504138568Ssam} 505170530Ssam#endif /* IEEE80211_DEBUG */ 506138568Ssam 507138568Ssam/* 508138568Ssam * Handle 802.11 ad hoc network merge. The 509138568Ssam * convention, set by the Wireless Ethernet Compatibility Alliance 510138568Ssam * (WECA), is that an 802.11 station will change its BSSID to match 511138568Ssam * the "oldest" 802.11 ad hoc network, on the same channel, that 512138568Ssam * has the station's desired SSID. The "oldest" 802.11 network 513138568Ssam * sends beacons with the greatest TSF timestamp. 514138568Ssam * 515138568Ssam * The caller is assumed to validate TSF's before attempting a merge. 516138568Ssam * 517138568Ssam * Return !0 if the BSSID changed, 0 otherwise. 518138568Ssam */ 519138568Ssamint 520148306Ssamieee80211_ibss_merge(struct ieee80211_node *ni) 521138568Ssam{ 522178354Ssam struct ieee80211vap *vap = ni->ni_vap; 523178354Ssam#ifdef IEEE80211_DEBUG 524148306Ssam struct ieee80211com *ic = ni->ni_ic; 525178354Ssam#endif 526138568Ssam 527178354Ssam if (ni == vap->iv_bss || 528178354Ssam IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { 529138568Ssam /* unchanged, nothing to do */ 530138568Ssam return 0; 531138568Ssam } 532178354Ssam if (!check_bss(vap, ni)) { 533170530Ssam /* capabilities mismatch */ 534178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 535138568Ssam "%s: merge failed, capabilities mismatch\n", __func__); 536170530Ssam#ifdef IEEE80211_DEBUG 537178354Ssam if (ieee80211_msg_assoc(vap)) 538178354Ssam check_bss_debug(vap, ni); 539170530Ssam#endif 540178354Ssam vap->iv_stats.is_ibss_capmismatch++; 541138568Ssam return 0; 542138568Ssam } 543178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, 544138568Ssam "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 545138568Ssam ether_sprintf(ni->ni_bssid), 546138568Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 547138568Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 548138568Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 549138568Ssam ); 550170530Ssam return ieee80211_sta_join1(ieee80211_ref_node(ni)); 551138568Ssam} 552138568Ssam 553138568Ssam/* 554178354Ssam * Calculate HT channel promotion flags for all vaps. 555178354Ssam * This assumes ni_chan have been setup for each vap. 556173273Ssam */ 557178354Ssamstatic int 558178354Ssamgethtadjustflags(struct ieee80211com *ic) 559178354Ssam{ 560178354Ssam struct ieee80211vap *vap; 561178354Ssam int flags; 562178354Ssam 563178354Ssam flags = 0; 564178354Ssam /* XXX locking */ 565178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 566178354Ssam if (vap->iv_state < IEEE80211_S_RUN) 567178354Ssam continue; 568178354Ssam switch (vap->iv_opmode) { 569178354Ssam case IEEE80211_M_WDS: 570178354Ssam case IEEE80211_M_STA: 571178354Ssam case IEEE80211_M_AHDEMO: 572178354Ssam case IEEE80211_M_HOSTAP: 573178354Ssam case IEEE80211_M_IBSS: 574178354Ssam flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); 575178354Ssam break; 576178354Ssam default: 577178354Ssam break; 578178354Ssam } 579178354Ssam } 580178354Ssam return flags; 581178354Ssam} 582178354Ssam 583178354Ssam/* 584178354Ssam * Check if the current channel needs to change based on whether 585178354Ssam * any vap's are using HT20/HT40. This is used sync the state of 586178354Ssam * ic_curchan after a channel width change on a running vap. 587178354Ssam */ 588173273Ssamvoid 589178354Ssamieee80211_sync_curchan(struct ieee80211com *ic) 590173273Ssam{ 591178354Ssam struct ieee80211_channel *c; 592178354Ssam 593178354Ssam c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); 594178354Ssam if (c != ic->ic_curchan) { 595178354Ssam ic->ic_curchan = c; 596178354Ssam ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 597178354Ssam ic->ic_set_channel(ic); 598178354Ssam } 599178354Ssam} 600178354Ssam 601178354Ssam/* 602178354Ssam * Change the current channel. The request channel may be 603178354Ssam * promoted if other vap's are operating with HT20/HT40. 604178354Ssam */ 605178354Ssamvoid 606178354Ssamieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) 607178354Ssam{ 608178354Ssam if (ic->ic_htcaps & IEEE80211_HTC_HT) { 609178354Ssam int flags = gethtadjustflags(ic); 610178354Ssam /* 611178354Ssam * Check for channel promotion required to support the 612178354Ssam * set of running vap's. This assumes we are called 613178354Ssam * after ni_chan is setup for each vap. 614178354Ssam */ 615178354Ssam /* NB: this assumes IEEE80211_FEXT_USEHT40 > IEEE80211_FEXT_HT */ 616178354Ssam if (flags > ieee80211_htchanflags(c)) 617178354Ssam c = ieee80211_ht_adjust_channel(ic, c, flags); 618178354Ssam } 619178354Ssam ic->ic_bsschan = ic->ic_curchan = c; 620173273Ssam ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 621173273Ssam ic->ic_set_channel(ic); 622173273Ssam} 623173273Ssam 624173273Ssam/* 625138568Ssam * Join the specified IBSS/BSS network. The node is assumed to 626138568Ssam * be passed in with a held reference. 627138568Ssam */ 628170530Ssamstatic int 629170530Ssamieee80211_sta_join1(struct ieee80211_node *selbs) 630138568Ssam{ 631178354Ssam struct ieee80211vap *vap = selbs->ni_vap; 632170530Ssam struct ieee80211com *ic = selbs->ni_ic; 633138568Ssam struct ieee80211_node *obss; 634170530Ssam int canreassoc; 635138568Ssam 636138568Ssam /* 637138568Ssam * Committed to selbs, setup state. 638138568Ssam */ 639178354Ssam obss = vap->iv_bss; 640170530Ssam /* 641170530Ssam * Check if old+new node have the same address in which 642170530Ssam * case we can reassociate when operating in sta mode. 643170530Ssam */ 644170530Ssam canreassoc = (obss != NULL && 645178354Ssam vap->iv_state == IEEE80211_S_RUN && 646170530Ssam IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 647178354Ssam vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ 648153352Ssam if (obss != NULL) { 649153352Ssam copy_bss(selbs, obss); 650178354Ssam ieee80211_node_reclaim(obss); 651178354Ssam obss = NULL; /* NB: guard against later use */ 652153352Ssam } 653165887Ssam 654138568Ssam /* 655165887Ssam * Delete unusable rates; we've already checked 656165887Ssam * that the negotiated rate set is acceptable. 657165887Ssam */ 658178354Ssam ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, 659167442Ssam IEEE80211_F_DODEL | IEEE80211_F_JOIN); 660165887Ssam 661178354Ssam ieee80211_setcurchan(ic, selbs->ni_chan); 662165887Ssam /* 663138568Ssam * Set the erp state (mostly the slot time) to deal with 664138568Ssam * the auto-select case; this should be redundant if the 665138568Ssam * mode is locked. 666138568Ssam */ 667138568Ssam ieee80211_reset_erp(ic); 668178354Ssam ieee80211_wme_initparams(vap); 669140753Ssam 670178354Ssam if (vap->iv_opmode == IEEE80211_M_STA) { 671170530Ssam if (canreassoc) { 672170530Ssam /* Reassociate */ 673178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 674170530Ssam } else { 675170530Ssam /* 676170530Ssam * Act as if we received a DEAUTH frame in case we 677170530Ssam * are invoked from the RUN state. This will cause 678170530Ssam * us to try to re-authenticate if we are operating 679170530Ssam * as a station. 680170530Ssam */ 681178354Ssam ieee80211_new_state(vap, IEEE80211_S_AUTH, 682170530Ssam IEEE80211_FC0_SUBTYPE_DEAUTH); 683170530Ssam } 684170530Ssam } else 685178354Ssam ieee80211_new_state(vap, IEEE80211_S_RUN, -1); 686138568Ssam return 1; 687116742Ssam} 688116742Ssam 689170530Ssamint 690178354Ssamieee80211_sta_join(struct ieee80211vap *vap, 691170530Ssam const struct ieee80211_scan_entry *se) 692170530Ssam{ 693178354Ssam struct ieee80211com *ic = vap->iv_ic; 694170530Ssam struct ieee80211_node *ni; 695170530Ssam 696178354Ssam ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); 697170530Ssam if (ni == NULL) { 698170530Ssam /* XXX msg */ 699170530Ssam return 0; 700170530Ssam } 701170530Ssam /* 702170530Ssam * Expand scan state into node's format. 703170530Ssam * XXX may not need all this stuff 704170530Ssam */ 705170530Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 706170530Ssam ni->ni_esslen = se->se_ssid[1]; 707170530Ssam memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 708170530Ssam ni->ni_rstamp = se->se_rstamp; 709170530Ssam ni->ni_tstamp.tsf = se->se_tstamp.tsf; 710170530Ssam ni->ni_intval = se->se_intval; 711170530Ssam ni->ni_capinfo = se->se_capinfo; 712170530Ssam ni->ni_chan = se->se_chan; 713170530Ssam ni->ni_timoff = se->se_timoff; 714170530Ssam ni->ni_fhdwell = se->se_fhdwell; 715170530Ssam ni->ni_fhindex = se->se_fhindex; 716170530Ssam ni->ni_erp = se->se_erp; 717178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); 718170530Ssam ni->ni_noise = se->se_noise; 719178354Ssam 720178354Ssam if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { 721178354Ssam ieee80211_ies_expand(&ni->ni_ies); 722178354Ssam if (ni->ni_ies.ath_ie != NULL) 723178354Ssam ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 724178354Ssam if (ni->ni_ies.htcap_ie != NULL) 725178354Ssam ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); 726178354Ssam if (ni->ni_ies.htinfo_ie != NULL) 727178354Ssam ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); 728173864Ssam } 729170530Ssam 730178354Ssam vap->iv_dtim_period = se->se_dtimperiod; 731178354Ssam vap->iv_dtim_count = 0; 732170530Ssam 733170530Ssam /* NB: must be after ni_chan is setup */ 734170530Ssam ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 735170530Ssam IEEE80211_F_DOSORT); 736170530Ssam 737170530Ssam return ieee80211_sta_join1(ieee80211_ref_node(ni)); 738170530Ssam} 739170530Ssam 740138568Ssam/* 741138568Ssam * Leave the specified IBSS/BSS network. The node is assumed to 742138568Ssam * be passed in with a held reference. 743138568Ssam */ 744138568Ssamvoid 745178354Ssamieee80211_sta_leave(struct ieee80211_node *ni) 746138568Ssam{ 747178354Ssam struct ieee80211com *ic = ni->ni_ic; 748178354Ssam 749138568Ssam ic->ic_node_cleanup(ni); 750178354Ssam ieee80211_notify_node_leave(ni); 751138568Ssam} 752138568Ssam 753178354Ssam/* 754178354Ssam * Send a deauthenticate frame and drop the station. 755178354Ssam */ 756178354Ssamvoid 757178354Ssamieee80211_node_deauth(struct ieee80211_node *ni, int reason) 758178354Ssam{ 759178354Ssam /* NB: bump the refcnt to be sure temporay nodes are not reclaimed */ 760178354Ssam ieee80211_ref_node(ni); 761178354Ssam if (ni->ni_associd != 0) 762178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); 763178354Ssam ieee80211_node_leave(ni); 764178354Ssam ieee80211_free_node(ni); 765178354Ssam} 766178354Ssam 767116742Ssamstatic struct ieee80211_node * 768179643Ssamnode_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 769116742Ssam{ 770127768Ssam struct ieee80211_node *ni; 771138568Ssam 772184210Sdes MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 773127768Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 774127768Ssam return ni; 775116742Ssam} 776116742Ssam 777138568Ssam/* 778178354Ssam * Initialize an ie blob with the specified data. If previous 779178354Ssam * data exists re-use the data block. As a side effect we clear 780178354Ssam * all references to specific ie's; the caller is required to 781178354Ssam * recalculate them. 782178354Ssam */ 783178354Ssamint 784178354Ssamieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) 785178354Ssam{ 786178354Ssam /* NB: assumes data+len are the last fields */ 787178354Ssam memset(ies, 0, offsetof(struct ieee80211_ies, data)); 788178354Ssam if (ies->data != NULL && ies->len != len) { 789178354Ssam /* data size changed */ 790184210Sdes FREE(ies->data, M_80211_NODE_IE); 791178354Ssam ies->data = NULL; 792178354Ssam } 793178354Ssam if (ies->data == NULL) { 794184210Sdes MALLOC(ies->data, uint8_t *, len, M_80211_NODE_IE, M_NOWAIT); 795178354Ssam if (ies->data == NULL) { 796178354Ssam ies->len = 0; 797178354Ssam /* NB: pointers have already been zero'd above */ 798178354Ssam return 0; 799178354Ssam } 800178354Ssam } 801178354Ssam memcpy(ies->data, data, len); 802178354Ssam ies->len = len; 803178354Ssam return 1; 804178354Ssam} 805178354Ssam 806178354Ssam/* 807178354Ssam * Reclaim storage for an ie blob. 808178354Ssam */ 809178354Ssamvoid 810178354Ssamieee80211_ies_cleanup(struct ieee80211_ies *ies) 811178354Ssam{ 812178354Ssam if (ies->data != NULL) 813184210Sdes FREE(ies->data, M_80211_NODE_IE); 814178354Ssam} 815178354Ssam 816178354Ssam/* 817178354Ssam * Expand an ie blob data contents and to fillin individual 818178354Ssam * ie pointers. The data blob is assumed to be well-formed; 819178354Ssam * we don't do any validity checking of ie lengths. 820178354Ssam */ 821178354Ssamvoid 822178354Ssamieee80211_ies_expand(struct ieee80211_ies *ies) 823178354Ssam{ 824178354Ssam uint8_t *ie; 825178354Ssam int ielen; 826178354Ssam 827178354Ssam ie = ies->data; 828178354Ssam ielen = ies->len; 829178354Ssam while (ielen > 0) { 830178354Ssam switch (ie[0]) { 831178354Ssam case IEEE80211_ELEMID_VENDOR: 832178354Ssam if (iswpaoui(ie)) 833178354Ssam ies->wpa_ie = ie; 834178354Ssam else if (iswmeoui(ie)) 835178354Ssam ies->wme_ie = ie; 836178354Ssam else if (isatherosoui(ie)) 837178354Ssam ies->ath_ie = ie; 838178354Ssam break; 839178354Ssam case IEEE80211_ELEMID_RSN: 840178354Ssam ies->rsn_ie = ie; 841178354Ssam break; 842178354Ssam case IEEE80211_ELEMID_HTCAP: 843178354Ssam ies->htcap_ie = ie; 844178354Ssam break; 845178354Ssam } 846178354Ssam ielen -= 2 + ie[1]; 847178354Ssam ie += 2 + ie[1]; 848178354Ssam } 849178354Ssam} 850178354Ssam 851178354Ssam/* 852138568Ssam * Reclaim any resources in a node and reset any critical 853138568Ssam * state. Typically nodes are free'd immediately after, 854138568Ssam * but in some cases the storage may be reused so we need 855138568Ssam * to insure consistent state (should probably fix that). 856138568Ssam */ 857116742Ssamstatic void 858138568Ssamnode_cleanup(struct ieee80211_node *ni) 859116742Ssam{ 860138568Ssam#define N(a) (sizeof(a)/sizeof(a[0])) 861178354Ssam struct ieee80211vap *vap = ni->ni_vap; 862170530Ssam int i; 863138568Ssam 864138568Ssam /* NB: preserve ni_table */ 865138568Ssam if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 866178354Ssam if (vap->iv_opmode != IEEE80211_M_STA) 867178354Ssam vap->iv_ps_sta--; 868138568Ssam ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 869178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 870178354Ssam "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); 871138568Ssam } 872147788Ssam /* 873173273Ssam * Cleanup any HT-related state. 874173273Ssam */ 875173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) 876173273Ssam ieee80211_ht_node_cleanup(ni); 877173273Ssam /* 878147788Ssam * Clear AREF flag that marks the authorization refcnt bump 879147788Ssam * has happened. This is probably not needed as the node 880147788Ssam * should always be removed from the table so not found but 881147788Ssam * do it just in case. 882147788Ssam */ 883147788Ssam ni->ni_flags &= ~IEEE80211_NODE_AREF; 884138568Ssam 885138568Ssam /* 886138568Ssam * Drain power save queue and, if needed, clear TIM. 887138568Ssam */ 888178354Ssam if (ieee80211_node_saveq_drain(ni) != 0 && vap->iv_set_tim != NULL) 889178354Ssam vap->iv_set_tim(ni, 0); 890138568Ssam 891138568Ssam ni->ni_associd = 0; 892138568Ssam if (ni->ni_challenge != NULL) { 893184210Sdes FREE(ni->ni_challenge, M_80211_NODE); 894138568Ssam ni->ni_challenge = NULL; 895138568Ssam } 896138568Ssam /* 897138568Ssam * Preserve SSID, WPA, and WME ie's so the bss node is 898138568Ssam * reusable during a re-auth/re-assoc state transition. 899138568Ssam * If we remove these data they will not be recreated 900138568Ssam * because they come from a probe-response or beacon frame 901138568Ssam * which cannot be expected prior to the association-response. 902138568Ssam * This should not be an issue when operating in other modes 903138568Ssam * as stations leaving always go through a full state transition 904138568Ssam * which will rebuild this state. 905138568Ssam * 906138568Ssam * XXX does this leave us open to inheriting old state? 907138568Ssam */ 908138568Ssam for (i = 0; i < N(ni->ni_rxfrag); i++) 909138568Ssam if (ni->ni_rxfrag[i] != NULL) { 910138568Ssam m_freem(ni->ni_rxfrag[i]); 911138568Ssam ni->ni_rxfrag[i] = NULL; 912138568Ssam } 913148863Ssam /* 914148863Ssam * Must be careful here to remove any key map entry w/o a LOR. 915148863Ssam */ 916148863Ssam ieee80211_node_delucastkey(ni); 917138568Ssam#undef N 918116742Ssam} 919116742Ssam 920116742Ssamstatic void 921138568Ssamnode_free(struct ieee80211_node *ni) 922116742Ssam{ 923138568Ssam struct ieee80211com *ic = ni->ni_ic; 924138568Ssam 925138568Ssam ic->ic_node_cleanup(ni); 926178354Ssam ieee80211_ies_cleanup(&ni->ni_ies); 927138568Ssam IEEE80211_NODE_SAVEQ_DESTROY(ni); 928178354Ssam IEEE80211_NODE_WDSQ_DESTROY(ni); 929184210Sdes FREE(ni, M_80211_NODE); 930116742Ssam} 931116742Ssam 932178354Ssamstatic void 933178354Ssamnode_age(struct ieee80211_node *ni) 934178354Ssam{ 935178354Ssam struct ieee80211vap *vap = ni->ni_vap; 936178354Ssam#if 0 937178354Ssam IEEE80211_NODE_LOCK_ASSERT(&ic->ic_sta); 938178354Ssam#endif 939178354Ssam /* 940178354Ssam * Age frames on the power save queue. 941178354Ssam */ 942178354Ssam if (ieee80211_node_saveq_age(ni) != 0 && 943178354Ssam IEEE80211_NODE_SAVEQ_QLEN(ni) == 0 && 944178354Ssam vap->iv_set_tim != NULL) 945178354Ssam vap->iv_set_tim(ni, 0); 946178354Ssam /* 947178354Ssam * Age frames on the wds pending queue. 948178354Ssam */ 949178354Ssam if (IEEE80211_NODE_WDSQ_QLEN(ni) != 0) 950178354Ssam ieee80211_node_wdsq_age(ni); 951178354Ssam /* 952178354Ssam * Age out HT resources (e.g. frames on the 953178354Ssam * A-MPDU reorder queues). 954178354Ssam */ 955178354Ssam if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) 956178354Ssam ieee80211_ht_node_age(ni); 957178354Ssam} 958178354Ssam 959170530Ssamstatic int8_t 960138568Ssamnode_getrssi(const struct ieee80211_node *ni) 961120104Ssam{ 962178354Ssam uint32_t avgrssi = ni->ni_avgrssi; 963178354Ssam int32_t rssi; 964178354Ssam 965178354Ssam if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) 966178354Ssam return 0; 967178354Ssam rssi = IEEE80211_RSSI_GET(avgrssi); 968178354Ssam return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; 969120104Ssam} 970120104Ssam 971116742Ssamstatic void 972170530Ssamnode_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 973170530Ssam{ 974178354Ssam *rssi = node_getrssi(ni); 975170530Ssam *noise = ni->ni_noise; 976170530Ssam} 977170530Ssam 978170530Ssamstatic void 979178354Ssamnode_getmimoinfo(const struct ieee80211_node *ni, 980178354Ssam struct ieee80211_mimo_info *info) 981116742Ssam{ 982178354Ssam /* XXX zero data? */ 983178354Ssam} 984178354Ssam 985178354Ssamstruct ieee80211_node * 986178354Ssamieee80211_alloc_node(struct ieee80211_node_table *nt, 987178354Ssam struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) 988178354Ssam{ 989138568Ssam struct ieee80211com *ic = nt->nt_ic; 990178354Ssam struct ieee80211_node *ni; 991116742Ssam int hash; 992116742Ssam 993179643Ssam ni = ic->ic_node_alloc(vap, macaddr); 994178354Ssam if (ni == NULL) { 995178354Ssam vap->iv_stats.is_rx_nodealloc++; 996178354Ssam return NULL; 997178354Ssam } 998178354Ssam 999178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1000140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 1001138568Ssam ether_sprintf(macaddr), nt->nt_name); 1002138568Ssam 1003116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1004116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 1005138568Ssam ieee80211_node_initref(ni); /* mark referenced */ 1006138568Ssam ni->ni_chan = IEEE80211_CHAN_ANYC; 1007138568Ssam ni->ni_authmode = IEEE80211_AUTH_OPEN; 1008138568Ssam ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 1009183251Ssam ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; 1010178354Ssam ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 1011178354Ssam ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; 1012139528Ssam ni->ni_inact_reload = nt->nt_inact_init; 1013139528Ssam ni->ni_inact = ni->ni_inact_reload; 1014170530Ssam ni->ni_ath_defkeyix = 0x7fff; 1015138568Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 1016178354Ssam IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1017138568Ssam 1018138568Ssam IEEE80211_NODE_LOCK(nt); 1019138568Ssam TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 1020138568Ssam LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 1021138568Ssam ni->ni_table = nt; 1022178354Ssam ni->ni_vap = vap; 1023138568Ssam ni->ni_ic = ic; 1024138568Ssam IEEE80211_NODE_UNLOCK(nt); 1025116742Ssam 1026116742Ssam return ni; 1027116742Ssam} 1028116742Ssam 1029148777Ssam/* 1030148777Ssam * Craft a temporary node suitable for sending a management frame 1031148777Ssam * to the specified station. We craft only as much state as we 1032148777Ssam * need to do the work since the node will be immediately reclaimed 1033148777Ssam * once the send completes. 1034148777Ssam */ 1035116742Ssamstruct ieee80211_node * 1036178354Ssamieee80211_tmp_node(struct ieee80211vap *vap, 1037178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1038148777Ssam{ 1039178354Ssam struct ieee80211com *ic = vap->iv_ic; 1040148777Ssam struct ieee80211_node *ni; 1041148777Ssam 1042179643Ssam ni = ic->ic_node_alloc(vap, macaddr); 1043148777Ssam if (ni != NULL) { 1044183259Ssam struct ieee80211_node *bss = vap->iv_bss; 1045183259Ssam 1046178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1047148777Ssam "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 1048148777Ssam 1049178354Ssam ni->ni_table = NULL; /* NB: pedantic */ 1050178354Ssam ni->ni_ic = ic; /* NB: needed to set channel */ 1051178354Ssam ni->ni_vap = vap; 1052178354Ssam 1053148777Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 1054183259Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1055148777Ssam ieee80211_node_initref(ni); /* mark referenced */ 1056148777Ssam /* NB: required by ieee80211_fix_rate */ 1057183259Ssam ieee80211_node_set_chan(ni, bss->ni_chan); 1058178354Ssam ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, 1059148777Ssam IEEE80211_KEYIX_NONE); 1060183259Ssam ni->ni_txpower = bss->ni_txpower; 1061148777Ssam /* XXX optimize away */ 1062148777Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 1063178354Ssam IEEE80211_NODE_WDSQ_INIT(ni, "unknown"); 1064148777Ssam } else { 1065148777Ssam /* XXX msg */ 1066178354Ssam vap->iv_stats.is_rx_nodealloc++; 1067148777Ssam } 1068148777Ssam return ni; 1069148777Ssam} 1070148777Ssam 1071148777Ssamstruct ieee80211_node * 1072178354Ssamieee80211_dup_bss(struct ieee80211vap *vap, 1073178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1074116742Ssam{ 1075178354Ssam struct ieee80211com *ic = vap->iv_ic; 1076138568Ssam struct ieee80211_node *ni; 1077138568Ssam 1078178354Ssam ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); 1079116742Ssam if (ni != NULL) { 1080183259Ssam struct ieee80211_node *bss = vap->iv_bss; 1081127770Ssam /* 1082178354Ssam * Inherit from iv_bss. 1083127770Ssam */ 1084183259Ssam copy_bss(ni, bss); 1085183259Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); 1086183259Ssam ieee80211_node_set_chan(ni, bss->ni_chan); 1087178354Ssam } 1088116742Ssam return ni; 1089116742Ssam} 1090116742Ssam 1091178354Ssam/* 1092178354Ssam * Create a bss node for a legacy WDS vap. The far end does 1093178354Ssam * not associate so we just create create a new node and 1094178354Ssam * simulate an association. The caller is responsible for 1095178354Ssam * installing the node as the bss node and handling any further 1096178354Ssam * setup work like authorizing the port. 1097178354Ssam */ 1098178354Ssamstruct ieee80211_node * 1099178354Ssamieee80211_node_create_wds(struct ieee80211vap *vap, 1100178354Ssam const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) 1101178354Ssam{ 1102178354Ssam struct ieee80211com *ic = vap->iv_ic; 1103178354Ssam struct ieee80211_node *ni; 1104178354Ssam 1105178354Ssam /* XXX check if node already in sta table? */ 1106178354Ssam ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); 1107178354Ssam if (ni != NULL) { 1108178354Ssam ni->ni_wdsvap = vap; 1109178354Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); 1110178354Ssam /* 1111178354Ssam * Inherit any manually configured settings. 1112178354Ssam */ 1113183259Ssam copy_bss(ni, vap->iv_bss); 1114178354Ssam ieee80211_node_set_chan(ni, chan); 1115178354Ssam /* NB: propagate ssid so available to WPA supplicant */ 1116178354Ssam ni->ni_esslen = vap->iv_des_ssid[0].len; 1117178354Ssam memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); 1118178354Ssam /* NB: no associd for peer */ 1119178354Ssam /* 1120178354Ssam * There are no management frames to use to 1121178354Ssam * discover neighbor capabilities, so blindly 1122178354Ssam * propagate the local configuration. 1123178354Ssam */ 1124178354Ssam if (vap->iv_flags & IEEE80211_F_WME) 1125178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 1126178354Ssam if (vap->iv_flags & IEEE80211_F_FF) 1127178354Ssam ni->ni_flags |= IEEE80211_NODE_FF; 1128178354Ssam if ((ic->ic_htcaps & IEEE80211_HTC_HT) && 1129178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_HT)) { 1130178354Ssam /* 1131178354Ssam * Device is HT-capable and HT is enabled for 1132178354Ssam * the vap; setup HT operation. On return 1133178354Ssam * ni_chan will be adjusted to an HT channel. 1134178354Ssam */ 1135178354Ssam ieee80211_ht_wds_init(ni); 1136178354Ssam } else { 1137178354Ssam struct ieee80211_channel *c = ni->ni_chan; 1138178354Ssam /* 1139178354Ssam * Force a legacy channel to be used. 1140178354Ssam */ 1141178354Ssam c = ieee80211_find_channel(ic, 1142178354Ssam c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); 1143178354Ssam KASSERT(c != NULL, ("no legacy channel, %u/%x", 1144178354Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); 1145178354Ssam ni->ni_chan = c; 1146178354Ssam } 1147178354Ssam } 1148178354Ssam return ni; 1149178354Ssam} 1150178354Ssam 1151178354Ssamstruct ieee80211_node * 1152138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1153178354Ssamieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, 1154178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1155138568Ssam#else 1156178354Ssamieee80211_find_node_locked(struct ieee80211_node_table *nt, 1157178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1158138568Ssam#endif 1159116742Ssam{ 1160116742Ssam struct ieee80211_node *ni; 1161116742Ssam int hash; 1162116742Ssam 1163138568Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 1164127772Ssam 1165116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 1166138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1167116742Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1168138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 1169138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1170178354Ssam IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1171140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1172140766Ssam func, line, 1173140766Ssam ni, ether_sprintf(ni->ni_macaddr), 1174140766Ssam ieee80211_node_refcnt(ni)); 1175138568Ssam#endif 1176127772Ssam return ni; 1177116742Ssam } 1178116742Ssam } 1179127772Ssam return NULL; 1180127772Ssam} 1181178354Ssam 1182178354Ssamstruct ieee80211_node * 1183138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1184178354Ssamieee80211_find_node_debug(struct ieee80211_node_table *nt, 1185178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1186178354Ssam#else 1187178354Ssamieee80211_find_node(struct ieee80211_node_table *nt, 1188178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1189138568Ssam#endif 1190178354Ssam{ 1191178354Ssam struct ieee80211_node *ni; 1192127772Ssam 1193178354Ssam IEEE80211_NODE_LOCK(nt); 1194178354Ssam ni = ieee80211_find_node_locked(nt, macaddr); 1195178354Ssam IEEE80211_NODE_UNLOCK(nt); 1196178354Ssam return ni; 1197178354Ssam} 1198178354Ssam 1199127772Ssamstruct ieee80211_node * 1200138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1201178354Ssamieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, 1202178354Ssam const struct ieee80211vap *vap, 1203178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1204138568Ssam#else 1205178354Ssamieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, 1206178354Ssam const struct ieee80211vap *vap, 1207178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1208138568Ssam#endif 1209127772Ssam{ 1210127772Ssam struct ieee80211_node *ni; 1211178354Ssam int hash; 1212127772Ssam 1213178354Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 1214178354Ssam 1215178354Ssam hash = IEEE80211_NODE_HASH(macaddr); 1216178354Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1217178354Ssam if (ni->ni_vap == vap && 1218178354Ssam IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 1219178354Ssam ieee80211_ref_node(ni); /* mark referenced */ 1220178354Ssam#ifdef IEEE80211_DEBUG_REFCNT 1221178354Ssam IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1222178354Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 1223178354Ssam func, line, 1224178354Ssam ni, ether_sprintf(ni->ni_macaddr), 1225178354Ssam ieee80211_node_refcnt(ni)); 1226178354Ssam#endif 1227178354Ssam return ni; 1228178354Ssam } 1229178354Ssam } 1230178354Ssam return NULL; 1231178354Ssam} 1232178354Ssam 1233178354Ssamstruct ieee80211_node * 1234178354Ssam#ifdef IEEE80211_DEBUG_REFCNT 1235178354Ssamieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, 1236178354Ssam const struct ieee80211vap *vap, 1237178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) 1238178354Ssam#else 1239178354Ssamieee80211_find_vap_node(struct ieee80211_node_table *nt, 1240178354Ssam const struct ieee80211vap *vap, 1241178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1242178354Ssam#endif 1243178354Ssam{ 1244178354Ssam struct ieee80211_node *ni; 1245178354Ssam 1246138568Ssam IEEE80211_NODE_LOCK(nt); 1247178354Ssam ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); 1248138568Ssam IEEE80211_NODE_UNLOCK(nt); 1249116742Ssam return ni; 1250116742Ssam} 1251116742Ssam 1252116742Ssam/* 1253138568Ssam * Fake up a node; this handles node discovery in adhoc mode. 1254138568Ssam * Note that for the driver's benefit we we treat this like 1255138568Ssam * an association so the driver has an opportunity to setup 1256138568Ssam * it's private state. 1257138568Ssam */ 1258138568Ssamstruct ieee80211_node * 1259178354Ssamieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, 1260170530Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1261138568Ssam{ 1262138568Ssam struct ieee80211_node *ni; 1263138568Ssam 1264178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1265153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 1266178354Ssam ni = ieee80211_dup_bss(vap, macaddr); 1267138568Ssam if (ni != NULL) { 1268178354Ssam struct ieee80211com *ic = vap->iv_ic; 1269178354Ssam 1270138568Ssam /* XXX no rate negotiation; just dup */ 1271178354Ssam ni->ni_rates = vap->iv_bss->ni_rates; 1272178354Ssam if (vap->iv_opmode == IEEE80211_M_AHDEMO) { 1273153404Ssam /* 1274170530Ssam * In adhoc demo mode there are no management 1275170530Ssam * frames to use to discover neighbor capabilities, 1276170530Ssam * so blindly propagate the local configuration 1277170530Ssam * so we can do interesting things (e.g. use 1278170530Ssam * WME to disable ACK's). 1279153404Ssam */ 1280178354Ssam if (vap->iv_flags & IEEE80211_F_WME) 1281153404Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 1282178354Ssam if (vap->iv_flags & IEEE80211_F_FF) 1283170530Ssam ni->ni_flags |= IEEE80211_NODE_FF; 1284153404Ssam } 1285183251Ssam node_setuptxparms(ni); 1286178354Ssam if (ic->ic_newassoc != NULL) 1287178354Ssam ic->ic_newassoc(ni, 1); 1288170530Ssam /* XXX not right for 802.1x/WPA */ 1289170530Ssam ieee80211_node_authorize(ni); 1290138568Ssam } 1291138568Ssam return ni; 1292138568Ssam} 1293138568Ssam 1294148936Ssamvoid 1295153073Ssamieee80211_init_neighbor(struct ieee80211_node *ni, 1296153073Ssam const struct ieee80211_frame *wh, 1297153073Ssam const struct ieee80211_scanparams *sp) 1298153073Ssam{ 1299153073Ssam ni->ni_esslen = sp->ssid[1]; 1300153073Ssam memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1301153073Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1302153073Ssam memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1303153073Ssam ni->ni_intval = sp->bintval; 1304153073Ssam ni->ni_capinfo = sp->capinfo; 1305153073Ssam ni->ni_chan = ni->ni_ic->ic_curchan; 1306153073Ssam ni->ni_fhdwell = sp->fhdwell; 1307153073Ssam ni->ni_fhindex = sp->fhindex; 1308153073Ssam ni->ni_erp = sp->erp; 1309153073Ssam ni->ni_timoff = sp->timoff; 1310153073Ssam 1311178354Ssam if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { 1312178354Ssam ieee80211_ies_expand(&ni->ni_ies); 1313178354Ssam if (ni->ni_ies.ath_ie != NULL) 1314178354Ssam ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 1315178354Ssam } 1316178354Ssam 1317153073Ssam /* NB: must be after ni_chan is setup */ 1318165887Ssam ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1319165887Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1320165887Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1321153073Ssam} 1322153073Ssam 1323148936Ssam/* 1324148936Ssam * Do node discovery in adhoc mode on receipt of a beacon 1325148936Ssam * or probe response frame. Note that for the driver's 1326148936Ssam * benefit we we treat this like an association so the 1327148936Ssam * driver has an opportunity to setup it's private state. 1328148936Ssam */ 1329148936Ssamstruct ieee80211_node * 1330178354Ssamieee80211_add_neighbor(struct ieee80211vap *vap, 1331148936Ssam const struct ieee80211_frame *wh, 1332148936Ssam const struct ieee80211_scanparams *sp) 1333148936Ssam{ 1334148936Ssam struct ieee80211_node *ni; 1335148936Ssam 1336178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1337153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1338178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ 1339148936Ssam if (ni != NULL) { 1340178354Ssam struct ieee80211com *ic = vap->iv_ic; 1341178354Ssam 1342153073Ssam ieee80211_init_neighbor(ni, wh, sp); 1343183251Ssam node_setuptxparms(ni); 1344148936Ssam if (ic->ic_newassoc != NULL) 1345148936Ssam ic->ic_newassoc(ni, 1); 1346148936Ssam /* XXX not right for 802.1x/WPA */ 1347148936Ssam ieee80211_node_authorize(ni); 1348148936Ssam } 1349148936Ssam return ni; 1350148936Ssam} 1351148936Ssam 1352148863Ssam#define IS_CTL(wh) \ 1353148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1354148863Ssam#define IS_PSPOLL(wh) \ 1355148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1356170530Ssam#define IS_BAR(wh) \ 1357170530Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1358179220Ssam#define IS_PROBEREQ(wh) \ 1359179220Ssam ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ 1360179220Ssam == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) 1361179220Ssam#define IS_BCAST_PROBEREQ(wh) \ 1362179220Ssam (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ 1363179220Ssam ((const struct ieee80211_frame *)(wh))->i_addr3)) 1364170530Ssam 1365179220Ssamstatic __inline struct ieee80211_node * 1366179220Ssam_find_rxnode(struct ieee80211_node_table *nt, 1367179220Ssam const struct ieee80211_frame_min *wh) 1368179220Ssam{ 1369179220Ssam /* XXX 4-address frames? */ 1370179220Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1371179220Ssam return ieee80211_find_node_locked(nt, wh->i_addr1); 1372179220Ssam if (IS_BCAST_PROBEREQ(wh)) 1373179220Ssam return NULL; /* spam bcast probe req to all vap's */ 1374179220Ssam return ieee80211_find_node_locked(nt, wh->i_addr2); 1375179220Ssam} 1376179220Ssam 1377138568Ssam/* 1378138568Ssam * Locate the node for sender, track state, and then pass the 1379179220Ssam * (referenced) node up to the 802.11 layer for its use. Note 1380179220Ssam * we can return NULL if the sender is not in the table. 1381138568Ssam */ 1382138568Ssamstruct ieee80211_node * 1383138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1384138568Ssamieee80211_find_rxnode_debug(struct ieee80211com *ic, 1385138568Ssam const struct ieee80211_frame_min *wh, const char *func, int line) 1386138568Ssam#else 1387138568Ssamieee80211_find_rxnode(struct ieee80211com *ic, 1388138568Ssam const struct ieee80211_frame_min *wh) 1389138568Ssam#endif 1390138568Ssam{ 1391138568Ssam struct ieee80211_node_table *nt; 1392138568Ssam struct ieee80211_node *ni; 1393138568Ssam 1394170530Ssam nt = &ic->ic_sta; 1395138568Ssam IEEE80211_NODE_LOCK(nt); 1396179220Ssam ni = _find_rxnode(nt, wh); 1397138568Ssam IEEE80211_NODE_UNLOCK(nt); 1398138568Ssam 1399148863Ssam return ni; 1400148863Ssam} 1401148863Ssam 1402148863Ssam/* 1403148863Ssam * Like ieee80211_find_rxnode but use the supplied h/w 1404148863Ssam * key index as a hint to locate the node in the key 1405148863Ssam * mapping table. If an entry is present at the key 1406148863Ssam * index we return it; otherwise do a normal lookup and 1407148863Ssam * update the mapping table if the station has a unicast 1408148863Ssam * key assigned to it. 1409148863Ssam */ 1410148863Ssamstruct ieee80211_node * 1411148863Ssam#ifdef IEEE80211_DEBUG_REFCNT 1412148863Ssamieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1413148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1414148863Ssam const char *func, int line) 1415148863Ssam#else 1416148863Ssamieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1417148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1418148863Ssam#endif 1419148863Ssam{ 1420148863Ssam struct ieee80211_node_table *nt; 1421148863Ssam struct ieee80211_node *ni; 1422148863Ssam 1423170530Ssam nt = &ic->ic_sta; 1424148863Ssam IEEE80211_NODE_LOCK(nt); 1425148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1426148863Ssam ni = nt->nt_keyixmap[keyix]; 1427148863Ssam else 1428148863Ssam ni = NULL; 1429148863Ssam if (ni == NULL) { 1430179220Ssam ni = _find_rxnode(nt, wh); 1431178354Ssam if (ni != NULL && nt->nt_keyixmap != NULL) { 1432148863Ssam /* 1433148863Ssam * If the station has a unicast key cache slot 1434148863Ssam * assigned update the key->node mapping table. 1435148863Ssam */ 1436148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1437148863Ssam /* XXX can keyixmap[keyix] != NULL? */ 1438148863Ssam if (keyix < nt->nt_keyixmax && 1439148863Ssam nt->nt_keyixmap[keyix] == NULL) { 1440178354Ssam IEEE80211_DPRINTF(ni->ni_vap, 1441178354Ssam IEEE80211_MSG_NODE, 1442148863Ssam "%s: add key map entry %p<%s> refcnt %d\n", 1443148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1444148863Ssam ieee80211_node_refcnt(ni)+1); 1445148863Ssam nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1446148863Ssam } 1447148863Ssam } 1448179220Ssam } else { 1449179220Ssam if (IS_BCAST_PROBEREQ(wh)) 1450179220Ssam ni = NULL; /* spam bcast probe req to all vap's */ 1451179220Ssam else 1452179220Ssam ieee80211_ref_node(ni); 1453179220Ssam } 1454148863Ssam IEEE80211_NODE_UNLOCK(nt); 1455148863Ssam 1456148863Ssam return ni; 1457148863Ssam} 1458179220Ssam#undef IS_BCAST_PROBEREQ 1459179220Ssam#undef IS_PROBEREQ 1460170530Ssam#undef IS_BAR 1461138568Ssam#undef IS_PSPOLL 1462138568Ssam#undef IS_CTL 1463138568Ssam 1464138568Ssam/* 1465127772Ssam * Return a reference to the appropriate node for sending 1466127772Ssam * a data frame. This handles node discovery in adhoc networks. 1467127772Ssam */ 1468127772Ssamstruct ieee80211_node * 1469138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1470178354Ssamieee80211_find_txnode_debug(struct ieee80211vap *vap, 1471178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN], 1472138568Ssam const char *func, int line) 1473138568Ssam#else 1474178354Ssamieee80211_find_txnode(struct ieee80211vap *vap, 1475178354Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 1476138568Ssam#endif 1477127772Ssam{ 1478178354Ssam struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; 1479127772Ssam struct ieee80211_node *ni; 1480127772Ssam 1481127772Ssam /* 1482127772Ssam * The destination address should be in the node table 1483148863Ssam * unless this is a multicast/broadcast frame. We can 1484148863Ssam * also optimize station mode operation, all frames go 1485148863Ssam * to the bss node. 1486127772Ssam */ 1487127772Ssam /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1488138568Ssam IEEE80211_NODE_LOCK(nt); 1489178354Ssam if (vap->iv_opmode == IEEE80211_M_STA || 1490178354Ssam vap->iv_opmode == IEEE80211_M_WDS || 1491178354Ssam IEEE80211_IS_MULTICAST(macaddr)) 1492178354Ssam ni = ieee80211_ref_node(vap->iv_bss); 1493158121Ssam else { 1494178354Ssam ni = ieee80211_find_node_locked(nt, macaddr); 1495178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1496158121Ssam (ni != NULL && ni->ni_associd == 0)) { 1497158121Ssam /* 1498158121Ssam * Station is not associated; don't permit the 1499158121Ssam * data frame to be sent by returning NULL. This 1500158121Ssam * is kinda a kludge but the least intrusive way 1501158121Ssam * to add this check into all drivers. 1502158121Ssam */ 1503158121Ssam ieee80211_unref_node(&ni); /* NB: null's ni */ 1504158121Ssam } 1505158121Ssam } 1506138568Ssam IEEE80211_NODE_UNLOCK(nt); 1507138568Ssam 1508138568Ssam if (ni == NULL) { 1509178354Ssam if (vap->iv_opmode == IEEE80211_M_IBSS || 1510178354Ssam vap->iv_opmode == IEEE80211_M_AHDEMO) { 1511140497Ssam /* 1512140497Ssam * In adhoc mode cons up a node for the destination. 1513140497Ssam * Note that we need an additional reference for the 1514178354Ssam * caller to be consistent with 1515178354Ssam * ieee80211_find_node_locked. 1516140497Ssam */ 1517178354Ssam ni = ieee80211_fakeup_adhoc_node(vap, macaddr); 1518140497Ssam if (ni != NULL) 1519140497Ssam (void) ieee80211_ref_node(ni); 1520140497Ssam } else { 1521178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, 1522178354Ssam "no node, discard frame (%s)", __func__); 1523178354Ssam vap->iv_stats.is_tx_nonode++; 1524127772Ssam } 1525127772Ssam } 1526127772Ssam return ni; 1527127772Ssam} 1528127772Ssam 1529116742Ssamstatic void 1530138568Ssam_ieee80211_free_node(struct ieee80211_node *ni) 1531116742Ssam{ 1532138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1533119150Ssam 1534179641Ssam /* 1535179641Ssam * NB: careful about referencing the vap as it may be 1536179641Ssam * gone if the last reference was held by a driver. 1537179641Ssam * We know the com will always be present so it's safe 1538179641Ssam * to use ni_ic below to reclaim resources. 1539179641Ssam */ 1540179641Ssam#if 0 1541178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1542140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 1543140766Ssam ether_sprintf(ni->ni_macaddr), 1544138568Ssam nt != NULL ? nt->nt_name : "<gone>"); 1545179641Ssam#endif 1546179641Ssam if (ni->ni_associd != 0) { 1547179641Ssam struct ieee80211vap *vap = ni->ni_vap; 1548179641Ssam if (vap->iv_aid_bitmap != NULL) 1549179641Ssam IEEE80211_AID_CLR(vap, ni->ni_associd); 1550179641Ssam } 1551138568Ssam if (nt != NULL) { 1552138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1553138568Ssam LIST_REMOVE(ni, ni_hash); 1554138568Ssam } 1555179641Ssam ni->ni_ic->ic_node_free(ni); 1556116742Ssam} 1557116742Ssam 1558116742Ssamvoid 1559138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1560138568Ssamieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1561138568Ssam#else 1562138568Ssamieee80211_free_node(struct ieee80211_node *ni) 1563138568Ssam#endif 1564116742Ssam{ 1565138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1566119150Ssam 1567138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1568178354Ssam IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1569140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1570138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1571138568Ssam#endif 1572148863Ssam if (nt != NULL) { 1573148863Ssam IEEE80211_NODE_LOCK(nt); 1574148863Ssam if (ieee80211_node_dectestref(ni)) { 1575148863Ssam /* 1576148863Ssam * Last reference, reclaim state. 1577148863Ssam */ 1578138568Ssam _ieee80211_free_node(ni); 1579148863Ssam } else if (ieee80211_node_refcnt(ni) == 1 && 1580148863Ssam nt->nt_keyixmap != NULL) { 1581148863Ssam ieee80211_keyix keyix; 1582148863Ssam /* 1583148863Ssam * Check for a last reference in the key mapping table. 1584148863Ssam */ 1585148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1586148863Ssam if (keyix < nt->nt_keyixmax && 1587148863Ssam nt->nt_keyixmap[keyix] == ni) { 1588178354Ssam IEEE80211_DPRINTF(ni->ni_vap, 1589178354Ssam IEEE80211_MSG_NODE, 1590148863Ssam "%s: %p<%s> clear key map entry", __func__, 1591148863Ssam ni, ether_sprintf(ni->ni_macaddr)); 1592148863Ssam nt->nt_keyixmap[keyix] = NULL; 1593148863Ssam ieee80211_node_decref(ni); /* XXX needed? */ 1594148863Ssam _ieee80211_free_node(ni); 1595148863Ssam } 1596148863Ssam } 1597148863Ssam IEEE80211_NODE_UNLOCK(nt); 1598148863Ssam } else { 1599148863Ssam if (ieee80211_node_dectestref(ni)) 1600138568Ssam _ieee80211_free_node(ni); 1601116742Ssam } 1602116742Ssam} 1603116742Ssam 1604138568Ssam/* 1605148863Ssam * Reclaim a unicast key and clear any key cache state. 1606148863Ssam */ 1607148863Ssamint 1608148863Ssamieee80211_node_delucastkey(struct ieee80211_node *ni) 1609148863Ssam{ 1610179641Ssam struct ieee80211com *ic = ni->ni_ic; 1611179641Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1612148863Ssam struct ieee80211_node *nikey; 1613148863Ssam ieee80211_keyix keyix; 1614148863Ssam int isowned, status; 1615148863Ssam 1616148863Ssam /* 1617148863Ssam * NB: We must beware of LOR here; deleting the key 1618148863Ssam * can cause the crypto layer to block traffic updates 1619148863Ssam * which can generate a LOR against the node table lock; 1620148863Ssam * grab it here and stash the key index for our use below. 1621148863Ssam * 1622148863Ssam * Must also beware of recursion on the node table lock. 1623148863Ssam * When called from node_cleanup we may already have 1624148863Ssam * the node table lock held. Unfortunately there's no 1625148863Ssam * way to separate out this path so we must do this 1626148863Ssam * conditionally. 1627148863Ssam */ 1628148863Ssam isowned = IEEE80211_NODE_IS_LOCKED(nt); 1629148863Ssam if (!isowned) 1630148863Ssam IEEE80211_NODE_LOCK(nt); 1631179641Ssam nikey = NULL; 1632179641Ssam status = 1; /* NB: success */ 1633179641Ssam if (!IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { 1634179641Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1635179641Ssam status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); 1636179641Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1637179641Ssam nikey = nt->nt_keyixmap[keyix]; 1638179641Ssam nt->nt_keyixmap[keyix] = NULL;; 1639179641Ssam } 1640179641Ssam } 1641148863Ssam if (!isowned) 1642178354Ssam IEEE80211_NODE_UNLOCK(nt); 1643148863Ssam 1644148863Ssam if (nikey != NULL) { 1645148863Ssam KASSERT(nikey == ni, 1646148863Ssam ("key map out of sync, ni %p nikey %p", ni, nikey)); 1647179641Ssam IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1648148863Ssam "%s: delete key map entry %p<%s> refcnt %d\n", 1649148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1650148863Ssam ieee80211_node_refcnt(ni)-1); 1651148863Ssam ieee80211_free_node(ni); 1652148863Ssam } 1653148863Ssam return status; 1654148863Ssam} 1655148863Ssam 1656148863Ssam/* 1657138568Ssam * Reclaim a node. If this is the last reference count then 1658138568Ssam * do the normal free work. Otherwise remove it from the node 1659138568Ssam * table and mark it gone by clearing the back-reference. 1660138568Ssam */ 1661138568Ssamstatic void 1662138568Ssamnode_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1663116742Ssam{ 1664148863Ssam ieee80211_keyix keyix; 1665138568Ssam 1666148863Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 1667148863Ssam 1668178354Ssam IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1669140766Ssam "%s: remove %p<%s> from %s table, refcnt %d\n", 1670140766Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1671140766Ssam nt->nt_name, ieee80211_node_refcnt(ni)-1); 1672148863Ssam /* 1673148863Ssam * Clear any entry in the unicast key mapping table. 1674148863Ssam * We need to do it here so rx lookups don't find it 1675148863Ssam * in the mapping table even if it's not in the hash 1676148863Ssam * table. We cannot depend on the mapping table entry 1677148863Ssam * being cleared because the node may not be free'd. 1678148863Ssam */ 1679148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1680148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1681148863Ssam nt->nt_keyixmap[keyix] == ni) { 1682178354Ssam IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1683148863Ssam "%s: %p<%s> clear key map entry\n", 1684148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr)); 1685148863Ssam nt->nt_keyixmap[keyix] = NULL; 1686148863Ssam ieee80211_node_decref(ni); /* NB: don't need free */ 1687148863Ssam } 1688138568Ssam if (!ieee80211_node_dectestref(ni)) { 1689138568Ssam /* 1690138568Ssam * Other references are present, just remove the 1691138568Ssam * node from the table so it cannot be found. When 1692138568Ssam * the references are dropped storage will be 1693140753Ssam * reclaimed. 1694138568Ssam */ 1695138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1696138568Ssam LIST_REMOVE(ni, ni_hash); 1697138568Ssam ni->ni_table = NULL; /* clear reference */ 1698138568Ssam } else 1699138568Ssam _ieee80211_free_node(ni); 1700138568Ssam} 1701138568Ssam 1702178354Ssam/* 1703178354Ssam * Reclaim a (bss) node. Decrement the refcnt and reclaim 1704178354Ssam * the node if the only other reference to it is in the sta 1705178354Ssam * table. This is effectively ieee80211_free_node followed 1706178354Ssam * by node_reclaim when the refcnt is 1 (after the free). 1707178354Ssam */ 1708138568Ssamstatic void 1709178354Ssamieee80211_node_reclaim(struct ieee80211_node *ni) 1710138568Ssam{ 1711178354Ssam struct ieee80211_node_table *nt = ni->ni_table; 1712116742Ssam 1713178354Ssam KASSERT(nt != NULL, ("reclaim node not in table")); 1714138568Ssam 1715178354Ssam#ifdef IEEE80211_DEBUG_REFCNT 1716178354Ssam IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, 1717178712Ssam "%s %p<%s> refcnt %d\n", __func__, ni, 1718178354Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1719178354Ssam#endif 1720178354Ssam IEEE80211_NODE_LOCK(nt); 1721178354Ssam if (ieee80211_node_dectestref(ni)) { 1722178354Ssam /* 1723178354Ssam * Last reference, reclaim state. 1724178354Ssam */ 1725178354Ssam _ieee80211_free_node(ni); 1726178354Ssam nt = NULL; 1727178354Ssam } else if (ieee80211_node_refcnt(ni) == 1 && 1728178354Ssam nt->nt_keyixmap != NULL) { 1729178354Ssam ieee80211_keyix keyix; 1730178354Ssam /* 1731178354Ssam * Check for a last reference in the key mapping table. 1732178354Ssam */ 1733178354Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1734178354Ssam if (keyix < nt->nt_keyixmax && 1735178354Ssam nt->nt_keyixmap[keyix] == ni) { 1736178354Ssam IEEE80211_DPRINTF(ni->ni_vap, 1737178354Ssam IEEE80211_MSG_NODE, 1738178354Ssam "%s: %p<%s> clear key map entry", __func__, 1739178354Ssam ni, ether_sprintf(ni->ni_macaddr)); 1740178354Ssam nt->nt_keyixmap[keyix] = NULL; 1741178354Ssam ieee80211_node_decref(ni); /* XXX needed? */ 1742178354Ssam _ieee80211_free_node(ni); 1743178354Ssam nt = NULL; 1744178354Ssam } 1745178354Ssam } 1746178354Ssam if (nt != NULL && ieee80211_node_refcnt(ni) == 1) { 1747178354Ssam /* 1748178354Ssam * Last reference is in the sta table; complete 1749178354Ssam * the reclaim. This handles bss nodes being 1750178354Ssam * recycled: the node has two references, one for 1751178354Ssam * iv_bss and one for the table. After dropping 1752178354Ssam * the iv_bss ref above we need to reclaim the sta 1753178354Ssam * table reference. 1754178354Ssam */ 1755178354Ssam ieee80211_node_decref(ni); /* NB: be pendantic */ 1756178354Ssam _ieee80211_free_node(ni); 1757178354Ssam } 1758178354Ssam IEEE80211_NODE_UNLOCK(nt); 1759178354Ssam} 1760178354Ssam 1761178354Ssam/* 1762178354Ssam * Node table support. 1763178354Ssam */ 1764178354Ssam 1765178354Ssamstatic void 1766178354Ssamieee80211_node_table_init(struct ieee80211com *ic, 1767178354Ssam struct ieee80211_node_table *nt, 1768178354Ssam const char *name, int inact, int keyixmax) 1769178354Ssam{ 1770178354Ssam struct ifnet *ifp = ic->ic_ifp; 1771178354Ssam 1772178354Ssam nt->nt_ic = ic; 1773178354Ssam IEEE80211_NODE_LOCK_INIT(nt, ifp->if_xname); 1774178354Ssam IEEE80211_NODE_ITERATE_LOCK_INIT(nt, ifp->if_xname); 1775178354Ssam TAILQ_INIT(&nt->nt_node); 1776178354Ssam nt->nt_name = name; 1777178354Ssam nt->nt_scangen = 1; 1778178354Ssam nt->nt_inact_init = inact; 1779178354Ssam nt->nt_keyixmax = keyixmax; 1780178354Ssam if (nt->nt_keyixmax > 0) { 1781184210Sdes MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 1782184210Sdes keyixmax * sizeof(struct ieee80211_node *), 1783178354Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 1784178354Ssam if (nt->nt_keyixmap == NULL) 1785178354Ssam if_printf(ic->ic_ifp, 1786178354Ssam "Cannot allocate key index map with %u entries\n", 1787178354Ssam keyixmax); 1788178354Ssam } else 1789178354Ssam nt->nt_keyixmap = NULL; 1790178354Ssam} 1791178354Ssam 1792178354Ssamstatic void 1793178354Ssamieee80211_node_table_reset(struct ieee80211_node_table *nt, 1794178354Ssam struct ieee80211vap *match) 1795178354Ssam{ 1796178354Ssam struct ieee80211_node *ni, *next; 1797178354Ssam 1798178354Ssam IEEE80211_NODE_LOCK(nt); 1799178354Ssam TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { 1800178354Ssam if (match != NULL && ni->ni_vap != match) 1801178354Ssam continue; 1802178354Ssam /* XXX can this happen? if so need's work */ 1803138568Ssam if (ni->ni_associd != 0) { 1804178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1805178354Ssam 1806178354Ssam if (vap->iv_auth->ia_node_leave != NULL) 1807178354Ssam vap->iv_auth->ia_node_leave(ni); 1808178354Ssam if (vap->iv_aid_bitmap != NULL) 1809178354Ssam IEEE80211_AID_CLR(vap, ni->ni_associd); 1810138568Ssam } 1811178354Ssam ni->ni_wdsvap = NULL; /* clear reference */ 1812138568Ssam node_reclaim(nt, ni); 1813138568Ssam } 1814178354Ssam if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { 1815178354Ssam /* 1816178354Ssam * Make a separate pass to clear references to this vap 1817178354Ssam * held by DWDS entries. They will not be matched above 1818178354Ssam * because ni_vap will point to the ap vap but we still 1819178354Ssam * need to clear ni_wdsvap when the WDS vap is destroyed 1820178354Ssam * and/or reset. 1821178354Ssam */ 1822178354Ssam TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) 1823178354Ssam if (ni->ni_wdsvap == match) 1824178354Ssam ni->ni_wdsvap = NULL; 1825178354Ssam } 1826178354Ssam IEEE80211_NODE_UNLOCK(nt); 1827116742Ssam} 1828116742Ssam 1829178354Ssamstatic void 1830178354Ssamieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1831178354Ssam{ 1832178354Ssam ieee80211_node_table_reset(nt, NULL); 1833178354Ssam if (nt->nt_keyixmap != NULL) { 1834178354Ssam#ifdef DIAGNOSTIC 1835178354Ssam /* XXX verify all entries are NULL */ 1836178354Ssam int i; 1837178354Ssam for (i = 0; i < nt->nt_keyixmax; i++) 1838178354Ssam if (nt->nt_keyixmap[i] != NULL) 1839178354Ssam printf("%s: %s[%u] still active\n", __func__, 1840178354Ssam nt->nt_name, i); 1841178354Ssam#endif 1842184210Sdes FREE(nt->nt_keyixmap, M_80211_NODE); 1843178354Ssam nt->nt_keyixmap = NULL; 1844178354Ssam } 1845178354Ssam IEEE80211_NODE_ITERATE_LOCK_DESTROY(nt); 1846178354Ssam IEEE80211_NODE_LOCK_DESTROY(nt); 1847178354Ssam} 1848178354Ssam 1849120483Ssam/* 1850138568Ssam * Timeout inactive stations and do related housekeeping. 1851138568Ssam * Note that we cannot hold the node lock while sending a 1852138568Ssam * frame as this would lead to a LOR. Instead we use a 1853138568Ssam * generation number to mark nodes that we've scanned and 1854138568Ssam * drop the lock and restart a scan if we have to time out 1855138568Ssam * a node. Since we are single-threaded by virtue of 1856120483Ssam * controlling the inactivity timer we can be sure this will 1857120483Ssam * process each node only once. 1858120483Ssam */ 1859138568Ssamstatic void 1860178354Ssamieee80211_timeout_stations(struct ieee80211com *ic) 1861116742Ssam{ 1862178354Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1863178354Ssam struct ieee80211vap *vap; 1864120483Ssam struct ieee80211_node *ni; 1865178354Ssam int gen = 0; 1866116742Ssam 1867178354Ssam IEEE80211_NODE_ITERATE_LOCK(nt); 1868154532Ssam gen = ++nt->nt_scangen; 1869120483Ssamrestart: 1870138568Ssam IEEE80211_NODE_LOCK(nt); 1871138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1872120483Ssam if (ni->ni_scangen == gen) /* previously handled */ 1873120483Ssam continue; 1874120483Ssam ni->ni_scangen = gen; 1875138568Ssam /* 1876147788Ssam * Ignore entries for which have yet to receive an 1877147788Ssam * authentication frame. These are transient and 1878147788Ssam * will be reclaimed when the last reference to them 1879147788Ssam * goes away (when frame xmits complete). 1880147788Ssam */ 1881178354Ssam vap = ni->ni_vap; 1882178354Ssam /* 1883178354Ssam * Only process stations when in RUN state. This 1884178354Ssam * insures, for example, that we don't timeout an 1885178354Ssam * inactive station during CAC. Note that CSA state 1886178354Ssam * is actually handled in ieee80211_node_timeout as 1887178354Ssam * it applies to more than timeout processing. 1888178354Ssam */ 1889178354Ssam if (vap->iv_state != IEEE80211_S_RUN) 1890178354Ssam continue; 1891178354Ssam /* XXX can vap be NULL? */ 1892178354Ssam if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 1893178354Ssam vap->iv_opmode == IEEE80211_M_STA) && 1894148323Ssam (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1895147788Ssam continue; 1896147788Ssam /* 1897138568Ssam * Free fragment if not needed anymore 1898138568Ssam * (last fragment older than 1s). 1899178354Ssam * XXX doesn't belong here, move to node_age 1900138568Ssam */ 1901138568Ssam if (ni->ni_rxfrag[0] != NULL && 1902138568Ssam ticks > ni->ni_rxfragstamp + hz) { 1903138568Ssam m_freem(ni->ni_rxfrag[0]); 1904138568Ssam ni->ni_rxfrag[0] = NULL; 1905138568Ssam } 1906172062Ssam if (ni->ni_inact > 0) 1907172062Ssam ni->ni_inact--; 1908140498Ssam /* 1909140498Ssam * Special case ourself; we may be idle for extended periods 1910140498Ssam * of time and regardless reclaiming our state is wrong. 1911178354Ssam * XXX run ic_node_age 1912140498Ssam */ 1913178354Ssam if (ni == vap->iv_bss) 1914140498Ssam continue; 1915178354Ssam if (ni->ni_associd != 0 || 1916178354Ssam (vap->iv_opmode == IEEE80211_M_IBSS || 1917178354Ssam vap->iv_opmode == IEEE80211_M_AHDEMO)) { 1918119150Ssam /* 1919178354Ssam * Age/drain resources held by the station. 1920138568Ssam */ 1921178354Ssam ic->ic_node_age(ni); 1922138568Ssam /* 1923138568Ssam * Probe the station before time it out. We 1924138568Ssam * send a null data frame which may not be 1925138568Ssam * universally supported by drivers (need it 1926138568Ssam * for ps-poll support so it should be...). 1927170530Ssam * 1928170530Ssam * XXX don't probe the station unless we've 1929170530Ssam * received a frame from them (and have 1930170530Ssam * some idea of the rates they are capable 1931170530Ssam * of); this will get fixed more properly 1932170530Ssam * soon with better handling of the rate set. 1933138568Ssam */ 1934178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1935172062Ssam (0 < ni->ni_inact && 1936178354Ssam ni->ni_inact <= vap->iv_inact_probe) && 1937170530Ssam ni->ni_rates.rs_nrates != 0) { 1938178354Ssam IEEE80211_NOTE(vap, 1939148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1940148320Ssam ni, "%s", 1941148320Ssam "probe station due to inactivity"); 1942148582Ssam /* 1943148582Ssam * Grab a reference before unlocking the table 1944148582Ssam * so the node cannot be reclaimed before we 1945148582Ssam * send the frame. ieee80211_send_nulldata 1946148582Ssam * understands we've done this and reclaims the 1947148582Ssam * ref for us as needed. 1948148582Ssam */ 1949148582Ssam ieee80211_ref_node(ni); 1950138568Ssam IEEE80211_NODE_UNLOCK(nt); 1951148301Ssam ieee80211_send_nulldata(ni); 1952138568Ssam /* XXX stat? */ 1953138568Ssam goto restart; 1954138568Ssam } 1955138568Ssam } 1956178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && 1957172062Ssam ni->ni_inact <= 0) { 1958178354Ssam IEEE80211_NOTE(vap, 1959148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1960148320Ssam "station timed out due to inactivity " 1961148320Ssam "(refcnt %u)", ieee80211_node_refcnt(ni)); 1962138568Ssam /* 1963138568Ssam * Send a deauthenticate frame and drop the station. 1964138568Ssam * This is somewhat complicated due to reference counts 1965138568Ssam * and locking. At this point a station will typically 1966138568Ssam * have a reference count of 1. ieee80211_node_leave 1967138568Ssam * will do a "free" of the node which will drop the 1968138568Ssam * reference count. But in the meantime a reference 1969138568Ssam * wil be held by the deauth frame. The actual reclaim 1970138568Ssam * of the node will happen either after the tx is 1971138568Ssam * completed or by ieee80211_node_leave. 1972120483Ssam * 1973138568Ssam * Separately we must drop the node lock before sending 1974170530Ssam * in case the driver takes a lock, as this can result 1975170530Ssam * in a LOR between the node lock and the driver lock. 1976119150Ssam */ 1977172229Ssam ieee80211_ref_node(ni); 1978138568Ssam IEEE80211_NODE_UNLOCK(nt); 1979138568Ssam if (ni->ni_associd != 0) { 1980178354Ssam IEEE80211_SEND_MGMT(ni, 1981138568Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1982138568Ssam IEEE80211_REASON_AUTH_EXPIRE); 1983138568Ssam } 1984178354Ssam ieee80211_node_leave(ni); 1985172229Ssam ieee80211_free_node(ni); 1986178354Ssam vap->iv_stats.is_node_timeout++; 1987120483Ssam goto restart; 1988120483Ssam } 1989116742Ssam } 1990138568Ssam IEEE80211_NODE_UNLOCK(nt); 1991138568Ssam 1992178354Ssam IEEE80211_NODE_ITERATE_UNLOCK(nt); 1993170530Ssam} 1994138568Ssam 1995178354Ssam/* 1996178354Ssam * Aggressively reclaim resources. This should be used 1997178354Ssam * only in a critical situation to reclaim mbuf resources. 1998178354Ssam */ 1999170530Ssamvoid 2000178354Ssamieee80211_drain(struct ieee80211com *ic) 2001178354Ssam{ 2002178354Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 2003178354Ssam struct ieee80211vap *vap; 2004178354Ssam struct ieee80211_node *ni; 2005178354Ssam 2006178354Ssam IEEE80211_NODE_LOCK(nt); 2007178354Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2008178354Ssam /* 2009178354Ssam * Ignore entries for which have yet to receive an 2010178354Ssam * authentication frame. These are transient and 2011178354Ssam * will be reclaimed when the last reference to them 2012178354Ssam * goes away (when frame xmits complete). 2013178354Ssam */ 2014178354Ssam vap = ni->ni_vap; 2015178354Ssam /* 2016178354Ssam * Only process stations when in RUN state. This 2017178354Ssam * insures, for example, that we don't timeout an 2018178354Ssam * inactive station during CAC. Note that CSA state 2019178354Ssam * is actually handled in ieee80211_node_timeout as 2020178354Ssam * it applies to more than timeout processing. 2021178354Ssam */ 2022178354Ssam if (vap->iv_state != IEEE80211_S_RUN) 2023178354Ssam continue; 2024178354Ssam /* XXX can vap be NULL? */ 2025178354Ssam if ((vap->iv_opmode == IEEE80211_M_HOSTAP || 2026178354Ssam vap->iv_opmode == IEEE80211_M_STA) && 2027178354Ssam (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 2028178354Ssam continue; 2029178354Ssam /* 2030178354Ssam * Free fragments. 2031178354Ssam * XXX doesn't belong here, move to node_drain 2032178354Ssam */ 2033178354Ssam if (ni->ni_rxfrag[0] != NULL) { 2034178354Ssam m_freem(ni->ni_rxfrag[0]); 2035178354Ssam ni->ni_rxfrag[0] = NULL; 2036178354Ssam } 2037178354Ssam /* 2038178354Ssam * Drain resources held by the station. 2039178354Ssam */ 2040178354Ssam ic->ic_node_drain(ni); 2041178354Ssam } 2042178354Ssam IEEE80211_NODE_UNLOCK(nt); 2043178354Ssam} 2044178354Ssam 2045178354Ssam/* 2046178354Ssam * Per-ieee80211com inactivity timer callback. 2047178354Ssam */ 2048178354Ssamvoid 2049170530Ssamieee80211_node_timeout(void *arg) 2050170530Ssam{ 2051170530Ssam struct ieee80211com *ic = arg; 2052170530Ssam 2053178354Ssam /* 2054178354Ssam * Defer timeout processing if a channel switch is pending. 2055178354Ssam * We typically need to be mute so not doing things that 2056178354Ssam * might generate frames is good to handle in one place. 2057178354Ssam * Supressing the station timeout processing may extend the 2058178354Ssam * lifetime of inactive stations (by not decrementing their 2059178354Ssam * idle counters) but this should be ok unless the CSA is 2060178354Ssam * active for an unusually long time. 2061178354Ssam */ 2062178354Ssam if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 2063178354Ssam ieee80211_scan_timeout(ic); 2064178354Ssam ieee80211_timeout_stations(ic); 2065170530Ssam 2066178354Ssam IEEE80211_LOCK(ic); 2067178354Ssam ieee80211_erp_timeout(ic); 2068178354Ssam ieee80211_ht_timeout(ic); 2069178354Ssam IEEE80211_UNLOCK(ic); 2070178354Ssam } 2071170530Ssam callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 2072170530Ssam ieee80211_node_timeout, ic); 2073116742Ssam} 2074116742Ssam 2075116742Ssamvoid 2076178354Ssamieee80211_iterate_nodes(struct ieee80211_node_table *nt, 2077178354Ssam ieee80211_iter_func *f, void *arg) 2078116742Ssam{ 2079116742Ssam struct ieee80211_node *ni; 2080138568Ssam u_int gen; 2081116742Ssam 2082178354Ssam IEEE80211_NODE_ITERATE_LOCK(nt); 2083154532Ssam gen = ++nt->nt_scangen; 2084138568Ssamrestart: 2085138568Ssam IEEE80211_NODE_LOCK(nt); 2086138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 2087138568Ssam if (ni->ni_scangen != gen) { 2088138568Ssam ni->ni_scangen = gen; 2089138568Ssam (void) ieee80211_ref_node(ni); 2090138568Ssam IEEE80211_NODE_UNLOCK(nt); 2091138568Ssam (*f)(arg, ni); 2092138568Ssam ieee80211_free_node(ni); 2093138568Ssam goto restart; 2094138568Ssam } 2095138568Ssam } 2096138568Ssam IEEE80211_NODE_UNLOCK(nt); 2097138568Ssam 2098178354Ssam IEEE80211_NODE_ITERATE_UNLOCK(nt); 2099116742Ssam} 2100138568Ssam 2101138568Ssamvoid 2102138568Ssamieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 2103138568Ssam{ 2104138568Ssam printf("0x%p: mac %s refcnt %d\n", ni, 2105138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 2106138568Ssam printf("\tscangen %u authmode %u flags 0x%x\n", 2107138568Ssam ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 2108138568Ssam printf("\tassocid 0x%x txpower %u vlan %u\n", 2109138568Ssam ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 2110138568Ssam printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 2111167439Ssam ni->ni_txseqs[IEEE80211_NONQOS_TID], 2112167439Ssam ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 2113167439Ssam ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 2114138568Ssam ni->ni_rxfragstamp); 2115170530Ssam printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 2116178354Ssam ni->ni_rstamp, node_getrssi(ni), ni->ni_noise, 2117170530Ssam ni->ni_intval, ni->ni_capinfo); 2118138568Ssam printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 2119138568Ssam ether_sprintf(ni->ni_bssid), 2120138568Ssam ni->ni_esslen, ni->ni_essid, 2121138568Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 2122178354Ssam printf("\tinact %u txrate %u\n", 2123178354Ssam ni->ni_inact, ni->ni_txrate); 2124170530Ssam printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 2125170530Ssam ni->ni_htcap, ni->ni_htparam, 2126170530Ssam ni->ni_htctlchan, ni->ni_ht2ndchan); 2127170530Ssam printf("\thtopmode %x htstbc %x chw %u\n", 2128170530Ssam ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 2129138568Ssam} 2130138568Ssam 2131138568Ssamvoid 2132138568Ssamieee80211_dump_nodes(struct ieee80211_node_table *nt) 2133138568Ssam{ 2134138568Ssam ieee80211_iterate_nodes(nt, 2135138568Ssam (ieee80211_iter_func *) ieee80211_dump_node, nt); 2136138568Ssam} 2137138568Ssam 2138179642Ssamstatic void 2139179642Ssamieee80211_notify_erp_locked(struct ieee80211com *ic) 2140172211Ssam{ 2141178354Ssam struct ieee80211vap *vap; 2142178354Ssam 2143178354Ssam IEEE80211_LOCK_ASSERT(ic); 2144178354Ssam 2145178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 2146178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP) 2147178354Ssam ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); 2148172211Ssam} 2149172211Ssam 2150179642Ssamvoid 2151179642Ssamieee80211_notify_erp(struct ieee80211com *ic) 2152179642Ssam{ 2153179642Ssam IEEE80211_LOCK(ic); 2154179642Ssam ieee80211_notify_erp_locked(ic); 2155179642Ssam IEEE80211_UNLOCK(ic); 2156179642Ssam} 2157179642Ssam 2158138568Ssam/* 2159138568Ssam * Handle a station joining an 11g network. 2160138568Ssam */ 2161138568Ssamstatic void 2162178354Ssamieee80211_node_join_11g(struct ieee80211_node *ni) 2163138568Ssam{ 2164178354Ssam struct ieee80211com *ic = ni->ni_ic; 2165138568Ssam 2166173273Ssam IEEE80211_LOCK_ASSERT(ic); 2167173273Ssam 2168138568Ssam /* 2169138568Ssam * Station isn't capable of short slot time. Bump 2170138568Ssam * the count of long slot time stations and disable 2171138568Ssam * use of short slot time. Note that the actual switch 2172138568Ssam * over to long slot time use may not occur until the 2173138568Ssam * next beacon transmission (per sec. 7.3.1.4 of 11g). 2174138568Ssam */ 2175138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2176138568Ssam ic->ic_longslotsta++; 2177178354Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2178172211Ssam "station needs long slot time, count %d", 2179172211Ssam ic->ic_longslotsta); 2180138568Ssam /* XXX vap's w/ conflicting needs won't work */ 2181170530Ssam if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 2182170530Ssam /* 2183170530Ssam * Don't force slot time when switched to turbo 2184170530Ssam * mode as non-ERP stations won't be present; this 2185170530Ssam * need only be done when on the normal G channel. 2186170530Ssam */ 2187170530Ssam ieee80211_set_shortslottime(ic, 0); 2188170530Ssam } 2189138568Ssam } 2190138568Ssam /* 2191138568Ssam * If the new station is not an ERP station 2192138568Ssam * then bump the counter and enable protection 2193138568Ssam * if configured. 2194138568Ssam */ 2195178354Ssam if (!ieee80211_iserp_rateset(&ni->ni_rates)) { 2196138568Ssam ic->ic_nonerpsta++; 2197178354Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2198172211Ssam "station is !ERP, %d non-ERP stations associated", 2199172211Ssam ic->ic_nonerpsta); 2200138568Ssam /* 2201138568Ssam * If station does not support short preamble 2202138568Ssam * then we must enable use of Barker preamble. 2203138568Ssam */ 2204138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 2205178354Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2206172211Ssam "%s", "station needs long preamble"); 2207138568Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 2208138568Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 2209138568Ssam } 2210172211Ssam /* 2211178354Ssam * If protection is configured and this is the first 2212178354Ssam * indication we should use protection, enable it. 2213172211Ssam */ 2214172211Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE && 2215172211Ssam ic->ic_nonerpsta == 1 && 2216172211Ssam (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2217178354Ssam IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2218172211Ssam "%s: enable use of protection\n", __func__); 2219172211Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 2220179642Ssam ieee80211_notify_erp_locked(ic); 2221172211Ssam } 2222138568Ssam } else 2223138568Ssam ni->ni_flags |= IEEE80211_NODE_ERP; 2224138568Ssam} 2225138568Ssam 2226138568Ssamvoid 2227178354Ssamieee80211_node_join(struct ieee80211_node *ni, int resp) 2228138568Ssam{ 2229178354Ssam struct ieee80211com *ic = ni->ni_ic; 2230178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2231138568Ssam int newassoc; 2232138568Ssam 2233138568Ssam if (ni->ni_associd == 0) { 2234170530Ssam uint16_t aid; 2235138568Ssam 2236178354Ssam KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); 2237138568Ssam /* 2238138568Ssam * It would be good to search the bitmap 2239138568Ssam * more efficiently, but this will do for now. 2240138568Ssam */ 2241178354Ssam for (aid = 1; aid < vap->iv_max_aid; aid++) { 2242178354Ssam if (!IEEE80211_AID_ISSET(vap, aid)) 2243138568Ssam break; 2244138568Ssam } 2245178354Ssam if (aid >= vap->iv_max_aid) { 2246179640Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); 2247178354Ssam ieee80211_node_leave(ni); 2248138568Ssam return; 2249138568Ssam } 2250138568Ssam ni->ni_associd = aid | 0xc000; 2251173273Ssam ni->ni_jointime = time_uptime; 2252178354Ssam IEEE80211_LOCK(ic); 2253178354Ssam IEEE80211_AID_SET(vap, ni->ni_associd); 2254178354Ssam vap->iv_sta_assoc++; 2255138568Ssam ic->ic_sta_assoc++; 2256173273Ssam 2257173273Ssam if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2258173273Ssam ieee80211_ht_node_join(ni); 2259170530Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2260170530Ssam IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2261178354Ssam ieee80211_node_join_11g(ni); 2262173273Ssam IEEE80211_UNLOCK(ic); 2263173273Ssam 2264173273Ssam newassoc = 1; 2265138568Ssam } else 2266138568Ssam newassoc = 0; 2267138568Ssam 2268178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2269183256Ssam "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 2270139523Ssam IEEE80211_NODE_AID(ni), 2271139523Ssam ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 2272139523Ssam ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 2273139523Ssam ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 2274170530Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 2275170530Ssam ni->ni_flags & IEEE80211_NODE_HT ? 2276182834Ssam (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 2277173273Ssam ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 2278183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 2279183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 2280183256Ssam ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 2281178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 2282170530Ssam ", fast-frames" : "", 2283178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 2284170530Ssam ", turbo" : "" 2285139523Ssam ); 2286138568Ssam 2287183251Ssam node_setuptxparms(ni); 2288138568Ssam /* give driver a chance to setup state like ni_txrate */ 2289139524Ssam if (ic->ic_newassoc != NULL) 2290148307Ssam ic->ic_newassoc(ni, newassoc); 2291178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); 2292138568Ssam /* tell the authenticator about new station */ 2293178354Ssam if (vap->iv_auth->ia_node_join != NULL) 2294178354Ssam vap->iv_auth->ia_node_join(ni); 2295178354Ssam ieee80211_notify_node_join(ni, 2296173866Ssam resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 2297138568Ssam} 2298138568Ssam 2299172211Ssamstatic void 2300172211Ssamdisable_protection(struct ieee80211com *ic) 2301172211Ssam{ 2302172211Ssam KASSERT(ic->ic_nonerpsta == 0 && 2303172211Ssam (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 2304172211Ssam ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 2305172211Ssam ic->ic_flags_ext)); 2306172211Ssam 2307172211Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 2308172211Ssam /* XXX verify mode? */ 2309172211Ssam if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 2310172211Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 2311172211Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 2312172211Ssam } 2313179642Ssam ieee80211_notify_erp_locked(ic); 2314172211Ssam} 2315172211Ssam 2316138568Ssam/* 2317138568Ssam * Handle a station leaving an 11g network. 2318138568Ssam */ 2319138568Ssamstatic void 2320178354Ssamieee80211_node_leave_11g(struct ieee80211_node *ni) 2321138568Ssam{ 2322178354Ssam struct ieee80211com *ic = ni->ni_ic; 2323138568Ssam 2324173273Ssam IEEE80211_LOCK_ASSERT(ic); 2325173273Ssam 2326170530Ssam KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 2327178354Ssam ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, 2328178354Ssam ic->ic_bsschan->ic_flags)); 2329138568Ssam 2330138568Ssam /* 2331138568Ssam * If a long slot station do the slot time bookkeeping. 2332138568Ssam */ 2333138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 2334138568Ssam KASSERT(ic->ic_longslotsta > 0, 2335138568Ssam ("bogus long slot station count %d", ic->ic_longslotsta)); 2336138568Ssam ic->ic_longslotsta--; 2337178354Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2338172211Ssam "long slot time station leaves, count now %d", 2339172211Ssam ic->ic_longslotsta); 2340138568Ssam if (ic->ic_longslotsta == 0) { 2341138568Ssam /* 2342138568Ssam * Re-enable use of short slot time if supported 2343138568Ssam * and not operating in IBSS mode (per spec). 2344138568Ssam */ 2345138568Ssam if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 2346138568Ssam ic->ic_opmode != IEEE80211_M_IBSS) { 2347178354Ssam IEEE80211_DPRINTF(ni->ni_vap, 2348178354Ssam IEEE80211_MSG_ASSOC, 2349138568Ssam "%s: re-enable use of short slot time\n", 2350138568Ssam __func__); 2351138568Ssam ieee80211_set_shortslottime(ic, 1); 2352138568Ssam } 2353138568Ssam } 2354138568Ssam } 2355138568Ssam /* 2356138568Ssam * If a non-ERP station do the protection-related bookkeeping. 2357138568Ssam */ 2358138568Ssam if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 2359138568Ssam KASSERT(ic->ic_nonerpsta > 0, 2360138568Ssam ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 2361138568Ssam ic->ic_nonerpsta--; 2362178354Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, 2363172211Ssam "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 2364172211Ssam (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 2365172211Ssam " (non-ERP sta present)" : ""); 2366172211Ssam if (ic->ic_nonerpsta == 0 && 2367172211Ssam (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 2368178354Ssam IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, 2369138568Ssam "%s: disable use of protection\n", __func__); 2370172211Ssam disable_protection(ic); 2371138568Ssam } 2372138568Ssam } 2373138568Ssam} 2374138568Ssam 2375138568Ssam/* 2376172211Ssam * Time out presence of an overlapping bss with non-ERP 2377172211Ssam * stations. When operating in hostap mode we listen for 2378172211Ssam * beacons from other stations and if we identify a non-ERP 2379172211Ssam * station is present we enable protection. To identify 2380172211Ssam * when all non-ERP stations are gone we time out this 2381172211Ssam * condition. 2382172211Ssam */ 2383172211Ssamstatic void 2384172211Ssamieee80211_erp_timeout(struct ieee80211com *ic) 2385172211Ssam{ 2386172211Ssam 2387172211Ssam IEEE80211_LOCK_ASSERT(ic); 2388172211Ssam 2389172211Ssam if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 2390172211Ssam time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 2391178354Ssam#if 0 2392178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2393178354Ssam "%s", "age out non-ERP sta present on channel"); 2394178354Ssam#endif 2395172211Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 2396172211Ssam if (ic->ic_nonerpsta == 0) 2397172211Ssam disable_protection(ic); 2398172211Ssam } 2399172211Ssam} 2400172211Ssam 2401172211Ssam/* 2402138568Ssam * Handle bookkeeping for station deauthentication/disassociation 2403138568Ssam * when operating as an ap. 2404138568Ssam */ 2405138568Ssamvoid 2406178354Ssamieee80211_node_leave(struct ieee80211_node *ni) 2407138568Ssam{ 2408178354Ssam struct ieee80211com *ic = ni->ni_ic; 2409178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2410140499Ssam struct ieee80211_node_table *nt = ni->ni_table; 2411138568Ssam 2412178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 2413172211Ssam "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 2414138568Ssam 2415178354Ssam KASSERT(vap->iv_opmode != IEEE80211_M_STA, 2416178354Ssam ("unexpected operating mode %u", vap->iv_opmode)); 2417138568Ssam /* 2418138568Ssam * If node wasn't previously associated all 2419138568Ssam * we need to do is reclaim the reference. 2420138568Ssam */ 2421138568Ssam /* XXX ibss mode bypasses 11g and notification */ 2422138568Ssam if (ni->ni_associd == 0) 2423138568Ssam goto done; 2424138568Ssam /* 2425138568Ssam * Tell the authenticator the station is leaving. 2426138568Ssam * Note that we must do this before yanking the 2427138568Ssam * association id as the authenticator uses the 2428138568Ssam * associd to locate it's state block. 2429138568Ssam */ 2430178354Ssam if (vap->iv_auth->ia_node_leave != NULL) 2431178354Ssam vap->iv_auth->ia_node_leave(ni); 2432173273Ssam 2433173273Ssam IEEE80211_LOCK(ic); 2434178354Ssam IEEE80211_AID_CLR(vap, ni->ni_associd); 2435138568Ssam ni->ni_associd = 0; 2436178354Ssam vap->iv_sta_assoc--; 2437138568Ssam ic->ic_sta_assoc--; 2438138568Ssam 2439173273Ssam if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 2440173273Ssam ieee80211_ht_node_leave(ni); 2441170530Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2442170530Ssam IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 2443178354Ssam ieee80211_node_leave_11g(ni); 2444173273Ssam IEEE80211_UNLOCK(ic); 2445138568Ssam /* 2446138568Ssam * Cleanup station state. In particular clear various 2447138568Ssam * state that might otherwise be reused if the node 2448138568Ssam * is reused before the reference count goes to zero 2449138568Ssam * (and memory is reclaimed). 2450138568Ssam */ 2451178354Ssam ieee80211_sta_leave(ni); 2452138568Ssamdone: 2453140499Ssam /* 2454140499Ssam * Remove the node from any table it's recorded in and 2455140499Ssam * drop the caller's reference. Removal from the table 2456140499Ssam * is important to insure the node is not reprocessed 2457140499Ssam * for inactivity. 2458140499Ssam */ 2459140499Ssam if (nt != NULL) { 2460140499Ssam IEEE80211_NODE_LOCK(nt); 2461140499Ssam node_reclaim(nt, ni); 2462140499Ssam IEEE80211_NODE_UNLOCK(nt); 2463140499Ssam } else 2464140499Ssam ieee80211_free_node(ni); 2465138568Ssam} 2466138568Ssam 2467178354Ssamstruct rssiinfo { 2468178354Ssam struct ieee80211vap *vap; 2469178354Ssam int rssi_samples; 2470178354Ssam uint32_t rssi_total; 2471178354Ssam}; 2472178354Ssam 2473178354Ssamstatic void 2474178354Ssamget_hostap_rssi(void *arg, struct ieee80211_node *ni) 2475178354Ssam{ 2476178354Ssam struct rssiinfo *info = arg; 2477178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2478178354Ssam int8_t rssi; 2479178354Ssam 2480178354Ssam if (info->vap != vap) 2481178354Ssam return; 2482178354Ssam /* only associated stations */ 2483178354Ssam if (ni->ni_associd == 0) 2484178354Ssam return; 2485178354Ssam rssi = vap->iv_ic->ic_node_getrssi(ni); 2486178354Ssam if (rssi != 0) { 2487178354Ssam info->rssi_samples++; 2488178354Ssam info->rssi_total += rssi; 2489178354Ssam } 2490178354Ssam} 2491178354Ssam 2492178354Ssamstatic void 2493178354Ssamget_adhoc_rssi(void *arg, struct ieee80211_node *ni) 2494178354Ssam{ 2495178354Ssam struct rssiinfo *info = arg; 2496178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2497178354Ssam int8_t rssi; 2498178354Ssam 2499178354Ssam if (info->vap != vap) 2500178354Ssam return; 2501178354Ssam /* only neighbors */ 2502178354Ssam /* XXX check bssid */ 2503178354Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 2504178354Ssam return; 2505178354Ssam rssi = vap->iv_ic->ic_node_getrssi(ni); 2506178354Ssam if (rssi != 0) { 2507178354Ssam info->rssi_samples++; 2508178354Ssam info->rssi_total += rssi; 2509178354Ssam } 2510178354Ssam} 2511178354Ssam 2512170530Ssamint8_t 2513178354Ssamieee80211_getrssi(struct ieee80211vap *vap) 2514138568Ssam{ 2515138568Ssam#define NZ(x) ((x) == 0 ? 1 : (x)) 2516178354Ssam struct ieee80211com *ic = vap->iv_ic; 2517178354Ssam struct rssiinfo info; 2518138568Ssam 2519178354Ssam info.rssi_total = 0; 2520178354Ssam info.rssi_samples = 0; 2521178354Ssam info.vap = vap; 2522178354Ssam switch (vap->iv_opmode) { 2523138568Ssam case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 2524138568Ssam case IEEE80211_M_AHDEMO: /* average of all neighbors */ 2525178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, get_adhoc_rssi, &info); 2526178354Ssam break; 2527138568Ssam case IEEE80211_M_HOSTAP: /* average of all associated stations */ 2528178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, get_hostap_rssi, &info); 2529138568Ssam break; 2530138568Ssam case IEEE80211_M_MONITOR: /* XXX */ 2531138568Ssam case IEEE80211_M_STA: /* use stats from associated ap */ 2532138568Ssam default: 2533178354Ssam if (vap->iv_bss != NULL) 2534178354Ssam info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); 2535178354Ssam info.rssi_samples = 1; 2536138568Ssam break; 2537138568Ssam } 2538178354Ssam return info.rssi_total / NZ(info.rssi_samples); 2539138568Ssam#undef NZ 2540138568Ssam} 2541138568Ssam 2542170530Ssamvoid 2543178354Ssamieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) 2544138568Ssam{ 2545138568Ssam 2546178354Ssam if (vap->iv_bss == NULL) /* NB: shouldn't happen */ 2547170530Ssam return; 2548178354Ssam vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); 2549170530Ssam /* for non-station mode return avg'd rssi accounting */ 2550178354Ssam if (vap->iv_opmode != IEEE80211_M_STA) 2551178354Ssam *rssi = ieee80211_getrssi(vap); 2552138568Ssam} 2553