ieee80211_node.c revision 173273
1116742Ssam/*- 2116904Ssam * Copyright (c) 2001 Atsushi Onoe 3170360Ssam * Copyright (c) 2002-2007 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 173273 2007-11-02 05:22:25Z sam $"); 29116742Ssam 30116742Ssam#include <sys/param.h> 31116742Ssam#include <sys/systm.h> 32116742Ssam#include <sys/mbuf.h> 33116742Ssam#include <sys/malloc.h> 34116742Ssam#include <sys/kernel.h> 35138568Ssam 36116742Ssam#include <sys/socket.h> 37116742Ssam 38116742Ssam#include <net/if.h> 39116742Ssam#include <net/if_media.h> 40116742Ssam#include <net/ethernet.h> 41116742Ssam 42116742Ssam#include <net80211/ieee80211_var.h> 43116742Ssam 44116742Ssam#include <net/bpf.h> 45116742Ssam 46147221Ssam/* 47147221Ssam * Association id's are managed with a bit vector. 48147221Ssam */ 49147221Ssam#define IEEE80211_AID_SET(b, w) \ 50147221Ssam ((w)[IEEE80211_AID(b) / 32] |= (1 << (IEEE80211_AID(b) % 32))) 51147221Ssam#define IEEE80211_AID_CLR(b, w) \ 52147221Ssam ((w)[IEEE80211_AID(b) / 32] &= ~(1 << (IEEE80211_AID(b) % 32))) 53147221Ssam#define IEEE80211_AID_ISSET(b, w) \ 54147221Ssam ((w)[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) 55147221Ssam 56159139Sdds#ifdef IEEE80211_DEBUG_REFCNT 57159139Sdds#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line 58159139Sdds#else 59159139Sdds#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__ 60159139Sdds#endif 61159139Sdds 62170530Ssamstatic int ieee80211_sta_join1(struct ieee80211_node *); 63170530Ssam 64138568Ssamstatic struct ieee80211_node *node_alloc(struct ieee80211_node_table *); 65138568Ssamstatic void node_cleanup(struct ieee80211_node *); 66138568Ssamstatic void node_free(struct ieee80211_node *); 67170530Ssamstatic int8_t node_getrssi(const struct ieee80211_node *); 68170530Ssamstatic void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); 69116742Ssam 70138568Ssamstatic void ieee80211_setup_node(struct ieee80211_node_table *, 71170530Ssam struct ieee80211_node *, const uint8_t *); 72138568Ssamstatic void _ieee80211_free_node(struct ieee80211_node *); 73120104Ssam 74138568Ssamstatic void ieee80211_node_table_init(struct ieee80211com *ic, 75148863Ssam struct ieee80211_node_table *nt, const char *name, 76170530Ssam int inact, int keymaxix); 77170530Ssamstatic void ieee80211_node_table_reset(struct ieee80211_node_table *); 78138568Ssamstatic void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); 79172211Ssamstatic void ieee80211_erp_timeout(struct ieee80211com *); 80138568Ssam 81127876SsamMALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 82120481Ssam 83116742Ssamvoid 84138568Ssamieee80211_node_attach(struct ieee80211com *ic) 85116742Ssam{ 86116742Ssam 87138568Ssam ic->ic_node_alloc = node_alloc; 88138568Ssam ic->ic_node_free = node_free; 89138568Ssam ic->ic_node_cleanup = node_cleanup; 90138568Ssam ic->ic_node_getrssi = node_getrssi; 91170530Ssam ic->ic_node_getsignal = node_getsignal; 92138568Ssam 93138568Ssam /* default station inactivity timer setings */ 94138568Ssam ic->ic_inact_init = IEEE80211_INACT_INIT; 95138568Ssam ic->ic_inact_auth = IEEE80211_INACT_AUTH; 96138568Ssam ic->ic_inact_run = IEEE80211_INACT_RUN; 97138568Ssam ic->ic_inact_probe = IEEE80211_INACT_PROBE; 98138568Ssam 99170530Ssam callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 100170530Ssam 101148863Ssam /* NB: driver should override */ 102148863Ssam ic->ic_max_aid = IEEE80211_AID_DEF; 103172062Ssam 104172062Ssam ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 105148863Ssam} 106148863Ssam 107148863Ssamvoid 108148863Ssamieee80211_node_lateattach(struct ieee80211com *ic) 109148863Ssam{ 110148863Ssam struct ieee80211_rsnparms *rsn; 111148863Ssam 112148863Ssam if (ic->ic_max_aid > IEEE80211_AID_MAX) 113138568Ssam ic->ic_max_aid = IEEE80211_AID_MAX; 114170530Ssam MALLOC(ic->ic_aid_bitmap, uint32_t *, 115170530Ssam howmany(ic->ic_max_aid, 32) * sizeof(uint32_t), 116170530Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 117138568Ssam if (ic->ic_aid_bitmap == NULL) { 118138568Ssam /* XXX no way to recover */ 119138568Ssam printf("%s: no memory for AID bitmap!\n", __func__); 120138568Ssam ic->ic_max_aid = 0; 121138568Ssam } 122138568Ssam 123148863Ssam ieee80211_node_table_init(ic, &ic->ic_sta, "station", 124170530Ssam IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix); 125118887Ssam 126148863Ssam ieee80211_reset_bss(ic); 127138568Ssam /* 128138568Ssam * Setup "global settings" in the bss node so that 129138568Ssam * each new station automatically inherits them. 130138568Ssam */ 131148863Ssam rsn = &ic->ic_bss->ni_rsn; 132138568Ssam /* WEP, TKIP, and AES-CCM are always supported */ 133138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 134138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 135138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 136138568Ssam if (ic->ic_caps & IEEE80211_C_AES) 137138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 138138568Ssam if (ic->ic_caps & IEEE80211_C_CKIP) 139138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 140138568Ssam /* 141138568Ssam * Default unicast cipher to WEP for 802.1x use. If 142138568Ssam * WPA is enabled the management code will set these 143138568Ssam * values to reflect. 144138568Ssam */ 145138568Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 146138568Ssam rsn->rsn_ucastkeylen = 104 / NBBY; 147138568Ssam /* 148138568Ssam * WPA says the multicast cipher is the lowest unicast 149138568Ssam * cipher supported. But we skip WEP which would 150138568Ssam * otherwise be used based on this criteria. 151138568Ssam */ 152138568Ssam rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 153138568Ssam rsn->rsn_mcastkeylen = 128 / NBBY; 154138568Ssam 155138568Ssam /* 156138568Ssam * We support both WPA-PSK and 802.1x; the one used 157138568Ssam * is determined by the authentication mode and the 158138568Ssam * setting of the PSK state. 159138568Ssam */ 160138568Ssam rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 161138568Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 162138568Ssam 163148863Ssam ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode); 164116742Ssam} 165116742Ssam 166116742Ssamvoid 167138568Ssamieee80211_node_detach(struct ieee80211com *ic) 168116742Ssam{ 169116742Ssam 170138568Ssam if (ic->ic_bss != NULL) { 171138568Ssam ieee80211_free_node(ic->ic_bss); 172138568Ssam ic->ic_bss = NULL; 173138568Ssam } 174140753Ssam ieee80211_node_table_cleanup(&ic->ic_sta); 175138568Ssam if (ic->ic_aid_bitmap != NULL) { 176170530Ssam FREE(ic->ic_aid_bitmap, M_80211_NODE); 177138568Ssam ic->ic_aid_bitmap = NULL; 178138568Ssam } 179116742Ssam} 180116742Ssam 181138568Ssam/* 182138568Ssam * Port authorize/unauthorize interfaces for use by an authenticator. 183138568Ssam */ 184138568Ssam 185138568Ssamvoid 186148302Ssamieee80211_node_authorize(struct ieee80211_node *ni) 187138568Ssam{ 188148302Ssam struct ieee80211com *ic = ni->ni_ic; 189148302Ssam 190138568Ssam ni->ni_flags |= IEEE80211_NODE_AUTH; 191139528Ssam ni->ni_inact_reload = ic->ic_inact_run; 192172062Ssam ni->ni_inact = ni->ni_inact_reload; 193138568Ssam} 194138568Ssam 195138568Ssamvoid 196148302Ssamieee80211_node_unauthorize(struct ieee80211_node *ni) 197138568Ssam{ 198172063Ssam struct ieee80211com *ic = ni->ni_ic; 199172063Ssam 200138568Ssam ni->ni_flags &= ~IEEE80211_NODE_AUTH; 201172062Ssam ni->ni_inact_reload = ic->ic_inact_auth; 202172062Ssam if (ni->ni_inact > ni->ni_inact_reload) 203172062Ssam ni->ni_inact = ni->ni_inact_reload; 204138568Ssam} 205138568Ssam 206116742Ssam/* 207138568Ssam * Set/change the channel. The rate set is also updated as 208138568Ssam * to insure a consistent view by drivers. 209138568Ssam */ 210153351Ssamstatic void 211170530Ssamieee80211_node_set_chan(struct ieee80211com *ic, struct ieee80211_node *ni) 212138568Ssam{ 213170530Ssam struct ieee80211_channel *chan = ic->ic_bsschan; 214170530Ssam 215170530Ssam#if 0 216170530Ssam KASSERT(chan != IEEE80211_CHAN_ANYC, ("bss channel not setup")); 217170530Ssam#else 218153351Ssam if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */ 219153351Ssam chan = ic->ic_curchan; 220170530Ssam#endif 221138568Ssam ni->ni_chan = chan; 222170530Ssam if (IEEE80211_IS_CHAN_HT(chan)) { 223170530Ssam /* 224170530Ssam * XXX Gotta be careful here; the rate set returned by 225170530Ssam * ieee80211_get_suprates is actually any HT rate 226170530Ssam * set so blindly copying it will be bad. We must 227170530Ssam * install the legacy rate est in ni_rates and the 228170530Ssam * HT rate set in ni_htrates. 229170530Ssam */ 230170530Ssam ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 231170530Ssam } 232165569Ssam ni->ni_rates = *ieee80211_get_suprates(ic, chan); 233138568Ssam} 234138568Ssam 235138568Ssam/* 236156358Ssam * Probe the curent channel, if allowed, while scanning. 237156358Ssam * If the channel is not marked passive-only then send 238156358Ssam * a probe request immediately. Otherwise mark state and 239156358Ssam * listen for beacons on the channel; if we receive something 240156358Ssam * then we'll transmit a probe request. 241156358Ssam */ 242156358Ssamvoid 243156358Ssamieee80211_probe_curchan(struct ieee80211com *ic, int force) 244156358Ssam{ 245156358Ssam struct ifnet *ifp = ic->ic_ifp; 246156358Ssam 247156358Ssam if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 || force) { 248156358Ssam /* 249156358Ssam * XXX send both broadcast+directed probe request 250156358Ssam */ 251156358Ssam ieee80211_send_probereq(ic->ic_bss, 252156358Ssam ic->ic_myaddr, ifp->if_broadcastaddr, 253156358Ssam ifp->if_broadcastaddr, 254170530Ssam ic->ic_des_ssid[0].ssid, ic->ic_des_ssid[0].len, 255156358Ssam ic->ic_opt_ie, ic->ic_opt_ie_len); 256156358Ssam } else 257156358Ssam ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN; 258156358Ssam} 259156358Ssam 260141658Ssamstatic __inline void 261141658Ssamcopy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 262141658Ssam{ 263141658Ssam /* propagate useful state */ 264141658Ssam nbss->ni_authmode = obss->ni_authmode; 265141658Ssam nbss->ni_txpower = obss->ni_txpower; 266141658Ssam nbss->ni_vlan = obss->ni_vlan; 267141658Ssam nbss->ni_rsn = obss->ni_rsn; 268141658Ssam /* XXX statistics? */ 269141658Ssam} 270141658Ssam 271116742Ssamvoid 272116742Ssamieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 273116742Ssam{ 274140753Ssam struct ieee80211_node_table *nt; 275116742Ssam struct ieee80211_node *ni; 276116742Ssam 277138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 278138568Ssam "%s: creating ibss\n", __func__); 279138568Ssam 280138568Ssam /* 281138568Ssam * Create the station/neighbor table. Note that for adhoc 282138568Ssam * mode we make the initial inactivity timer longer since 283138568Ssam * we create nodes only through discovery and they typically 284138568Ssam * are long-lived associations. 285138568Ssam */ 286140753Ssam nt = &ic->ic_sta; 287140753Ssam IEEE80211_NODE_LOCK(nt); 288140753Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 289140753Ssam nt->nt_name = "station"; 290140753Ssam nt->nt_inact_init = ic->ic_inact_init; 291140753Ssam } else { 292140753Ssam nt->nt_name = "neighbor"; 293140753Ssam nt->nt_inact_init = ic->ic_inact_run; 294140753Ssam } 295140753Ssam IEEE80211_NODE_UNLOCK(nt); 296140753Ssam 297148863Ssam ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 298140753Ssam if (ni == NULL) { 299140753Ssam /* XXX recovery? */ 300138568Ssam return; 301138568Ssam } 302116742Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 303170530Ssam ni->ni_esslen = ic->ic_des_ssid[0].len; 304170530Ssam memcpy(ni->ni_essid, ic->ic_des_ssid[0].ssid, ni->ni_esslen); 305170530Ssam if (ic->ic_bss != NULL) 306170530Ssam copy_bss(ni, ic->ic_bss); 307148843Ssam ni->ni_intval = ic->ic_bintval; 308138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 309116742Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 310116742Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 311116742Ssam ni->ni_fhdwell = 200; /* XXX */ 312116742Ssam ni->ni_fhindex = 1; 313116742Ssam } 314138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 315138568Ssam ic->ic_flags |= IEEE80211_F_SIBSS; 316138568Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 317143300Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 318143300Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 319167282Ssam else { 320167282Ssam get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 321167282Ssam /* clear group bit, add local bit */ 322167282Ssam ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 323167282Ssam } 324153403Ssam } else if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 325153403Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 326153403Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 327153403Ssam else 328153403Ssam memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 329138568Ssam } 330138568Ssam /* 331138568Ssam * Fix the channel and related attributes. 332138568Ssam */ 333170530Ssam ic->ic_bsschan = chan; 334170530Ssam ieee80211_node_set_chan(ic, ni); 335170530Ssam ic->ic_curmode = ieee80211_chan2mode(chan); 336138568Ssam /* 337138568Ssam * Do mode-specific rate setup. 338138568Ssam */ 339170530Ssam if (IEEE80211_IS_CHAN_FULL(chan)) { 340170530Ssam if (IEEE80211_IS_CHAN_ANYG(chan)) { 341170530Ssam /* 342170530Ssam * Use a mixed 11b/11g rate set. 343170530Ssam */ 344170530Ssam ieee80211_set11gbasicrates(&ni->ni_rates, 345170530Ssam IEEE80211_MODE_11G); 346170530Ssam } else if (IEEE80211_IS_CHAN_B(chan)) { 347170530Ssam /* 348170530Ssam * Force pure 11b rate set. 349170530Ssam */ 350170530Ssam ieee80211_set11gbasicrates(&ni->ni_rates, 351170530Ssam IEEE80211_MODE_11B); 352170530Ssam } 353170530Ssam } 354138568Ssam 355170530Ssam (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 356116742Ssam} 357116742Ssam 358170530Ssam/* 359170530Ssam * Reset bss state on transition to the INIT state. 360170530Ssam * Clear any stations from the table (they have been 361170530Ssam * deauth'd) and reset the bss node (clears key, rate 362170530Ssam * etc. state). 363170530Ssam */ 364138568Ssamvoid 365138568Ssamieee80211_reset_bss(struct ieee80211com *ic) 366138568Ssam{ 367138568Ssam struct ieee80211_node *ni, *obss; 368138568Ssam 369170530Ssam callout_drain(&ic->ic_inact); 370140753Ssam ieee80211_node_table_reset(&ic->ic_sta); 371170530Ssam ieee80211_reset_erp(ic); 372140753Ssam 373170530Ssam ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 374138568Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 375138568Ssam obss = ic->ic_bss; 376138568Ssam ic->ic_bss = ieee80211_ref_node(ni); 377141658Ssam if (obss != NULL) { 378141658Ssam copy_bss(ni, obss); 379148843Ssam ni->ni_intval = ic->ic_bintval; 380138568Ssam ieee80211_free_node(obss); 381141658Ssam } 382138568Ssam} 383138568Ssam 384170530Ssamstatic int 385170530Ssammatch_ssid(const struct ieee80211_node *ni, 386170530Ssam int nssid, const struct ieee80211_scan_ssid ssids[]) 387170530Ssam{ 388170530Ssam int i; 389148432Ssam 390170530Ssam for (i = 0; i < nssid; i++) { 391170530Ssam if (ni->ni_esslen == ssids[i].len && 392170530Ssam memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 393170530Ssam return 1; 394170530Ssam } 395170530Ssam return 0; 396170530Ssam} 397170530Ssam 398170530Ssam/* 399170530Ssam * Test a node for suitability/compatibility. 400170530Ssam */ 401127767Ssamstatic int 402170530Ssamcheck_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 403127767Ssam{ 404170530Ssam uint8_t rate; 405170530Ssam 406170530Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 407170530Ssam return 0; 408170530Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 409170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 410170530Ssam return 0; 411170530Ssam } else { 412170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 413170530Ssam return 0; 414170530Ssam } 415170530Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 416170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 417170530Ssam return 0; 418170530Ssam } else { 419170530Ssam /* XXX does this mean privacy is supported or required? */ 420170530Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 421170530Ssam return 0; 422170530Ssam } 423170530Ssam rate = ieee80211_fix_rate(ni, &ni->ni_rates, 424170530Ssam IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 425170530Ssam if (rate & IEEE80211_RATE_BASIC) 426170530Ssam return 0; 427170530Ssam if (ic->ic_des_nssid != 0 && 428170530Ssam !match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid)) 429170530Ssam return 0; 430170530Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 431170530Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 432170530Ssam return 0; 433170530Ssam return 1; 434170530Ssam} 435170530Ssam 436170530Ssam#ifdef IEEE80211_DEBUG 437170530Ssam/* 438170530Ssam * Display node suitability/compatibility. 439170530Ssam */ 440170530Ssamstatic void 441170530Ssamcheck_bss_debug(struct ieee80211com *ic, struct ieee80211_node *ni) 442170530Ssam{ 443170530Ssam uint8_t rate; 444127767Ssam int fail; 445127767Ssam 446127767Ssam fail = 0; 447127767Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 448127767Ssam fail |= 0x01; 449127767Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 450127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 451127767Ssam fail |= 0x02; 452127767Ssam } else { 453127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 454127767Ssam fail |= 0x02; 455127767Ssam } 456138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 457127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 458127767Ssam fail |= 0x04; 459127767Ssam } else { 460127767Ssam /* XXX does this mean privacy is supported or required? */ 461127767Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 462127767Ssam fail |= 0x04; 463127767Ssam } 464167442Ssam rate = ieee80211_fix_rate(ni, &ni->ni_rates, 465165887Ssam IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 466127767Ssam if (rate & IEEE80211_RATE_BASIC) 467127767Ssam fail |= 0x08; 468170530Ssam if (ic->ic_des_nssid != 0 && 469170530Ssam !match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid)) 470127767Ssam fail |= 0x10; 471127767Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 472127767Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 473127767Ssam fail |= 0x20; 474127767Ssam 475170530Ssam printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 476170530Ssam printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 477170530Ssam printf(" %3d%c", 478170530Ssam ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 479170530Ssam printf(" %+4d", ni->ni_rssi); 480170530Ssam printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 481170530Ssam fail & 0x08 ? '!' : ' '); 482170530Ssam printf(" %4s%c", 483170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 484170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 485170530Ssam "????", 486170530Ssam fail & 0x02 ? '!' : ' '); 487170530Ssam printf(" %3s%c ", 488170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 489170530Ssam fail & 0x04 ? '!' : ' '); 490170530Ssam ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 491170530Ssam printf("%s\n", fail & 0x10 ? "!" : ""); 492138568Ssam} 493170530Ssam#endif /* IEEE80211_DEBUG */ 494138568Ssam 495138568Ssam/* 496138568Ssam * Handle 802.11 ad hoc network merge. The 497138568Ssam * convention, set by the Wireless Ethernet Compatibility Alliance 498138568Ssam * (WECA), is that an 802.11 station will change its BSSID to match 499138568Ssam * the "oldest" 802.11 ad hoc network, on the same channel, that 500138568Ssam * has the station's desired SSID. The "oldest" 802.11 network 501138568Ssam * sends beacons with the greatest TSF timestamp. 502138568Ssam * 503138568Ssam * The caller is assumed to validate TSF's before attempting a merge. 504138568Ssam * 505138568Ssam * Return !0 if the BSSID changed, 0 otherwise. 506138568Ssam */ 507138568Ssamint 508148306Ssamieee80211_ibss_merge(struct ieee80211_node *ni) 509138568Ssam{ 510148306Ssam struct ieee80211com *ic = ni->ni_ic; 511138568Ssam 512140453Ssam if (ni == ic->ic_bss || 513140453Ssam IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 514138568Ssam /* unchanged, nothing to do */ 515138568Ssam return 0; 516138568Ssam } 517170530Ssam if (!check_bss(ic, ni)) { 518170530Ssam /* capabilities mismatch */ 519138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 520138568Ssam "%s: merge failed, capabilities mismatch\n", __func__); 521170530Ssam#ifdef IEEE80211_DEBUG 522170530Ssam if (ieee80211_msg_assoc(ic)) 523170530Ssam check_bss_debug(ic, ni); 524170530Ssam#endif 525138568Ssam ic->ic_stats.is_ibss_capmismatch++; 526138568Ssam return 0; 527138568Ssam } 528138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 529138568Ssam "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 530138568Ssam ether_sprintf(ni->ni_bssid), 531138568Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 532138568Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 533138568Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 534138568Ssam ); 535170530Ssam return ieee80211_sta_join1(ieee80211_ref_node(ni)); 536138568Ssam} 537138568Ssam 538138568Ssam/* 539173273Ssam * Change the bss channel. 540173273Ssam */ 541173273Ssamvoid 542173273Ssamieee80211_setbsschan(struct ieee80211com *ic, struct ieee80211_channel *c) 543173273Ssam{ 544173273Ssam ic->ic_bsschan = c; 545173273Ssam ic->ic_curchan = ic->ic_bsschan; 546173273Ssam ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 547173273Ssam ic->ic_set_channel(ic); 548173273Ssam} 549173273Ssam 550173273Ssam/* 551138568Ssam * Join the specified IBSS/BSS network. The node is assumed to 552138568Ssam * be passed in with a held reference. 553138568Ssam */ 554170530Ssamstatic int 555170530Ssamieee80211_sta_join1(struct ieee80211_node *selbs) 556138568Ssam{ 557170530Ssam struct ieee80211com *ic = selbs->ni_ic; 558138568Ssam struct ieee80211_node *obss; 559170530Ssam int canreassoc; 560138568Ssam 561116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 562140753Ssam struct ieee80211_node_table *nt; 563138568Ssam /* 564140753Ssam * Fillin the neighbor table; it will already 565139521Ssam * exist if we are simply switching mastership. 566140753Ssam * XXX ic_sta always setup so this is unnecessary? 567127772Ssam */ 568140753Ssam nt = &ic->ic_sta; 569140753Ssam IEEE80211_NODE_LOCK(nt); 570140753Ssam nt->nt_name = "neighbor"; 571140753Ssam nt->nt_inact_init = ic->ic_inact_run; 572140753Ssam IEEE80211_NODE_UNLOCK(nt); 573138568Ssam } 574138568Ssam 575138568Ssam /* 576138568Ssam * Committed to selbs, setup state. 577138568Ssam */ 578138568Ssam obss = ic->ic_bss; 579170530Ssam /* 580170530Ssam * Check if old+new node have the same address in which 581170530Ssam * case we can reassociate when operating in sta mode. 582170530Ssam */ 583170530Ssam canreassoc = (obss != NULL && 584170530Ssam ic->ic_state == IEEE80211_S_RUN && 585170530Ssam IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 586140753Ssam ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 587153352Ssam if (obss != NULL) { 588153352Ssam copy_bss(selbs, obss); 589138568Ssam ieee80211_free_node(obss); 590153352Ssam } 591165887Ssam 592138568Ssam /* 593165887Ssam * Delete unusable rates; we've already checked 594165887Ssam * that the negotiated rate set is acceptable. 595165887Ssam */ 596167442Ssam ieee80211_fix_rate(ic->ic_bss, &ic->ic_bss->ni_rates, 597167442Ssam IEEE80211_F_DODEL | IEEE80211_F_JOIN); 598165887Ssam 599173273Ssam ieee80211_setbsschan(ic, selbs->ni_chan); 600165887Ssam /* 601138568Ssam * Set the erp state (mostly the slot time) to deal with 602138568Ssam * the auto-select case; this should be redundant if the 603138568Ssam * mode is locked. 604138568Ssam */ 605138568Ssam ieee80211_reset_erp(ic); 606138568Ssam ieee80211_wme_initparams(ic); 607140753Ssam 608170530Ssam if (ic->ic_opmode == IEEE80211_M_STA) { 609170530Ssam if (canreassoc) { 610170530Ssam /* Reassociate */ 611170530Ssam ieee80211_new_state(ic, IEEE80211_S_ASSOC, 1); 612170530Ssam } else { 613170530Ssam /* 614170530Ssam * Act as if we received a DEAUTH frame in case we 615170530Ssam * are invoked from the RUN state. This will cause 616170530Ssam * us to try to re-authenticate if we are operating 617170530Ssam * as a station. 618170530Ssam */ 619170530Ssam ieee80211_new_state(ic, IEEE80211_S_AUTH, 620170530Ssam IEEE80211_FC0_SUBTYPE_DEAUTH); 621170530Ssam } 622170530Ssam } else 623117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 624138568Ssam return 1; 625116742Ssam} 626116742Ssam 627170530Ssamint 628170530Ssamieee80211_sta_join(struct ieee80211com *ic, 629170530Ssam const struct ieee80211_scan_entry *se) 630170530Ssam{ 631170530Ssam struct ieee80211_node *ni; 632170530Ssam 633170530Ssam ni = ieee80211_alloc_node(&ic->ic_sta, se->se_macaddr); 634170530Ssam if (ni == NULL) { 635170530Ssam /* XXX msg */ 636170530Ssam return 0; 637170530Ssam } 638170530Ssam /* 639170530Ssam * Expand scan state into node's format. 640170530Ssam * XXX may not need all this stuff 641170530Ssam */ 642170530Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 643170530Ssam ni->ni_esslen = se->se_ssid[1]; 644170530Ssam memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 645170530Ssam ni->ni_rstamp = se->se_rstamp; 646170530Ssam ni->ni_tstamp.tsf = se->se_tstamp.tsf; 647170530Ssam ni->ni_intval = se->se_intval; 648170530Ssam ni->ni_capinfo = se->se_capinfo; 649170530Ssam ni->ni_chan = se->se_chan; 650170530Ssam ni->ni_timoff = se->se_timoff; 651170530Ssam ni->ni_fhdwell = se->se_fhdwell; 652170530Ssam ni->ni_fhindex = se->se_fhindex; 653170530Ssam ni->ni_erp = se->se_erp; 654170530Ssam ni->ni_rssi = se->se_rssi; 655170530Ssam ni->ni_noise = se->se_noise; 656170530Ssam if (se->se_htcap_ie != NULL) 657173273Ssam ieee80211_saveie(&ni->ni_htcap_ie, se->se_htcap_ie); 658170530Ssam if (se->se_wpa_ie != NULL) 659170530Ssam ieee80211_saveie(&ni->ni_wpa_ie, se->se_wpa_ie); 660170530Ssam if (se->se_rsn_ie != NULL) 661170530Ssam ieee80211_saveie(&ni->ni_rsn_ie, se->se_rsn_ie); 662170530Ssam if (se->se_wme_ie != NULL) 663170530Ssam ieee80211_saveie(&ni->ni_wme_ie, se->se_wme_ie); 664170530Ssam if (se->se_ath_ie != NULL) 665170530Ssam ieee80211_saveath(ni, se->se_ath_ie); 666170530Ssam 667170530Ssam ic->ic_dtim_period = se->se_dtimperiod; 668170530Ssam ic->ic_dtim_count = 0; 669170530Ssam 670170530Ssam /* NB: must be after ni_chan is setup */ 671170530Ssam ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 672170530Ssam IEEE80211_F_DOSORT); 673170530Ssam 674170530Ssam return ieee80211_sta_join1(ieee80211_ref_node(ni)); 675170530Ssam} 676170530Ssam 677138568Ssam/* 678138568Ssam * Leave the specified IBSS/BSS network. The node is assumed to 679138568Ssam * be passed in with a held reference. 680138568Ssam */ 681138568Ssamvoid 682138568Ssamieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 683138568Ssam{ 684138568Ssam ic->ic_node_cleanup(ni); 685138568Ssam ieee80211_notify_node_leave(ic, ni); 686138568Ssam} 687138568Ssam 688116742Ssamstatic struct ieee80211_node * 689138568Ssamnode_alloc(struct ieee80211_node_table *nt) 690116742Ssam{ 691127768Ssam struct ieee80211_node *ni; 692138568Ssam 693127768Ssam MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 694127768Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 695127768Ssam return ni; 696116742Ssam} 697116742Ssam 698138568Ssam/* 699138568Ssam * Reclaim any resources in a node and reset any critical 700138568Ssam * state. Typically nodes are free'd immediately after, 701138568Ssam * but in some cases the storage may be reused so we need 702138568Ssam * to insure consistent state (should probably fix that). 703138568Ssam */ 704116742Ssamstatic void 705138568Ssamnode_cleanup(struct ieee80211_node *ni) 706116742Ssam{ 707138568Ssam#define N(a) (sizeof(a)/sizeof(a[0])) 708138568Ssam struct ieee80211com *ic = ni->ni_ic; 709170530Ssam int i; 710138568Ssam 711138568Ssam /* NB: preserve ni_table */ 712138568Ssam if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 713172228Ssam if (ic->ic_opmode != IEEE80211_M_STA) 714172228Ssam ic->ic_ps_sta--; 715138568Ssam ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 716138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 717138568Ssam "[%s] power save mode off, %u sta's in ps mode\n", 718138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 719138568Ssam } 720147788Ssam /* 721173273Ssam * Cleanup any HT-related state. 722173273Ssam */ 723173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) 724173273Ssam ieee80211_ht_node_cleanup(ni); 725173273Ssam /* 726147788Ssam * Clear AREF flag that marks the authorization refcnt bump 727147788Ssam * has happened. This is probably not needed as the node 728147788Ssam * should always be removed from the table so not found but 729147788Ssam * do it just in case. 730147788Ssam */ 731147788Ssam ni->ni_flags &= ~IEEE80211_NODE_AREF; 732138568Ssam 733138568Ssam /* 734138568Ssam * Drain power save queue and, if needed, clear TIM. 735138568Ssam */ 736170530Ssam if (ieee80211_node_saveq_drain(ni) != 0 && ic->ic_set_tim != NULL) 737148304Ssam ic->ic_set_tim(ni, 0); 738138568Ssam 739138568Ssam ni->ni_associd = 0; 740138568Ssam if (ni->ni_challenge != NULL) { 741170530Ssam FREE(ni->ni_challenge, M_80211_NODE); 742138568Ssam ni->ni_challenge = NULL; 743138568Ssam } 744138568Ssam /* 745138568Ssam * Preserve SSID, WPA, and WME ie's so the bss node is 746138568Ssam * reusable during a re-auth/re-assoc state transition. 747138568Ssam * If we remove these data they will not be recreated 748138568Ssam * because they come from a probe-response or beacon frame 749138568Ssam * which cannot be expected prior to the association-response. 750138568Ssam * This should not be an issue when operating in other modes 751138568Ssam * as stations leaving always go through a full state transition 752138568Ssam * which will rebuild this state. 753138568Ssam * 754138568Ssam * XXX does this leave us open to inheriting old state? 755138568Ssam */ 756138568Ssam for (i = 0; i < N(ni->ni_rxfrag); i++) 757138568Ssam if (ni->ni_rxfrag[i] != NULL) { 758138568Ssam m_freem(ni->ni_rxfrag[i]); 759138568Ssam ni->ni_rxfrag[i] = NULL; 760138568Ssam } 761148863Ssam /* 762148863Ssam * Must be careful here to remove any key map entry w/o a LOR. 763148863Ssam */ 764148863Ssam ieee80211_node_delucastkey(ni); 765138568Ssam#undef N 766116742Ssam} 767116742Ssam 768116742Ssamstatic void 769138568Ssamnode_free(struct ieee80211_node *ni) 770116742Ssam{ 771138568Ssam struct ieee80211com *ic = ni->ni_ic; 772138568Ssam 773138568Ssam ic->ic_node_cleanup(ni); 774138568Ssam if (ni->ni_wpa_ie != NULL) 775170530Ssam FREE(ni->ni_wpa_ie, M_80211_NODE); 776170530Ssam if (ni->ni_rsn_ie != NULL) 777170530Ssam FREE(ni->ni_rsn_ie, M_80211_NODE); 778138568Ssam if (ni->ni_wme_ie != NULL) 779170530Ssam FREE(ni->ni_wme_ie, M_80211_NODE); 780170530Ssam if (ni->ni_ath_ie != NULL) 781170530Ssam FREE(ni->ni_ath_ie, M_80211_NODE); 782138568Ssam IEEE80211_NODE_SAVEQ_DESTROY(ni); 783138568Ssam FREE(ni, M_80211_NODE); 784116742Ssam} 785116742Ssam 786170530Ssamstatic int8_t 787138568Ssamnode_getrssi(const struct ieee80211_node *ni) 788120104Ssam{ 789120104Ssam return ni->ni_rssi; 790120104Ssam} 791120104Ssam 792116742Ssamstatic void 793170530Ssamnode_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 794170530Ssam{ 795170530Ssam *rssi = ni->ni_rssi; 796170530Ssam *noise = ni->ni_noise; 797170530Ssam} 798170530Ssam 799170530Ssamstatic void 800138568Ssamieee80211_setup_node(struct ieee80211_node_table *nt, 801170530Ssam struct ieee80211_node *ni, const uint8_t *macaddr) 802116742Ssam{ 803138568Ssam struct ieee80211com *ic = nt->nt_ic; 804116742Ssam int hash; 805116742Ssam 806138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 807140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 808138568Ssam ether_sprintf(macaddr), nt->nt_name); 809138568Ssam 810116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 811116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 812138568Ssam ieee80211_node_initref(ni); /* mark referenced */ 813138568Ssam ni->ni_chan = IEEE80211_CHAN_ANYC; 814138568Ssam ni->ni_authmode = IEEE80211_AUTH_OPEN; 815138568Ssam ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 816138568Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 817139528Ssam ni->ni_inact_reload = nt->nt_inact_init; 818139528Ssam ni->ni_inact = ni->ni_inact_reload; 819170530Ssam ni->ni_ath_defkeyix = 0x7fff; 820138568Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 821138568Ssam 822138568Ssam IEEE80211_NODE_LOCK(nt); 823138568Ssam TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 824138568Ssam LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 825138568Ssam ni->ni_table = nt; 826138568Ssam ni->ni_ic = ic; 827138568Ssam IEEE80211_NODE_UNLOCK(nt); 828116742Ssam} 829116742Ssam 830116742Ssamstruct ieee80211_node * 831170530Ssamieee80211_alloc_node(struct ieee80211_node_table *nt, const uint8_t *macaddr) 832116742Ssam{ 833138568Ssam struct ieee80211com *ic = nt->nt_ic; 834138568Ssam struct ieee80211_node *ni; 835138568Ssam 836138568Ssam ni = ic->ic_node_alloc(nt); 837116742Ssam if (ni != NULL) 838138568Ssam ieee80211_setup_node(nt, ni, macaddr); 839127769Ssam else 840127769Ssam ic->ic_stats.is_rx_nodealloc++; 841116742Ssam return ni; 842116742Ssam} 843116742Ssam 844148777Ssam/* 845148777Ssam * Craft a temporary node suitable for sending a management frame 846148777Ssam * to the specified station. We craft only as much state as we 847148777Ssam * need to do the work since the node will be immediately reclaimed 848148777Ssam * once the send completes. 849148777Ssam */ 850116742Ssamstruct ieee80211_node * 851170530Ssamieee80211_tmp_node(struct ieee80211com *ic, const uint8_t *macaddr) 852148777Ssam{ 853148777Ssam struct ieee80211_node *ni; 854148777Ssam 855148777Ssam ni = ic->ic_node_alloc(&ic->ic_sta); 856148777Ssam if (ni != NULL) { 857148777Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 858148777Ssam "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 859148777Ssam 860148777Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 861148777Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 862148777Ssam ieee80211_node_initref(ni); /* mark referenced */ 863148777Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 864148777Ssam /* NB: required by ieee80211_fix_rate */ 865170530Ssam ieee80211_node_set_chan(ic, ni); 866148777Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, 867148777Ssam IEEE80211_KEYIX_NONE); 868148777Ssam /* XXX optimize away */ 869148777Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 870148777Ssam 871148777Ssam ni->ni_table = NULL; /* NB: pedantic */ 872148777Ssam ni->ni_ic = ic; 873148777Ssam } else { 874148777Ssam /* XXX msg */ 875148777Ssam ic->ic_stats.is_rx_nodealloc++; 876148777Ssam } 877148777Ssam return ni; 878148777Ssam} 879148777Ssam 880148777Ssamstruct ieee80211_node * 881170530Ssamieee80211_dup_bss(struct ieee80211_node_table *nt, const uint8_t *macaddr) 882116742Ssam{ 883138568Ssam struct ieee80211com *ic = nt->nt_ic; 884138568Ssam struct ieee80211_node *ni; 885138568Ssam 886138568Ssam ni = ic->ic_node_alloc(nt); 887116742Ssam if (ni != NULL) { 888138568Ssam ieee80211_setup_node(nt, ni, macaddr); 889127770Ssam /* 890127770Ssam * Inherit from ic_bss. 891127770Ssam */ 892138568Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 893138568Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 894138568Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 895127770Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 896170530Ssam ieee80211_node_set_chan(ic, ni); 897138568Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 898127770Ssam } else 899127770Ssam ic->ic_stats.is_rx_nodealloc++; 900116742Ssam return ni; 901116742Ssam} 902116742Ssam 903127772Ssamstatic struct ieee80211_node * 904138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 905138568Ssam_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 906170530Ssam const uint8_t *macaddr, const char *func, int line) 907138568Ssam#else 908138568Ssam_ieee80211_find_node(struct ieee80211_node_table *nt, 909170530Ssam const uint8_t *macaddr) 910138568Ssam#endif 911116742Ssam{ 912116742Ssam struct ieee80211_node *ni; 913116742Ssam int hash; 914116742Ssam 915138568Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 916127772Ssam 917116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 918138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 919116742Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 920138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 921138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 922138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 923140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 924140766Ssam func, line, 925140766Ssam ni, ether_sprintf(ni->ni_macaddr), 926140766Ssam ieee80211_node_refcnt(ni)); 927138568Ssam#endif 928127772Ssam return ni; 929116742Ssam } 930116742Ssam } 931127772Ssam return NULL; 932127772Ssam} 933138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 934138568Ssam#define _ieee80211_find_node(nt, mac) \ 935138568Ssam _ieee80211_find_node_debug(nt, mac, func, line) 936138568Ssam#endif 937127772Ssam 938127772Ssamstruct ieee80211_node * 939138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 940138568Ssamieee80211_find_node_debug(struct ieee80211_node_table *nt, 941170530Ssam const uint8_t *macaddr, const char *func, int line) 942138568Ssam#else 943170530Ssamieee80211_find_node(struct ieee80211_node_table *nt, const uint8_t *macaddr) 944138568Ssam#endif 945127772Ssam{ 946127772Ssam struct ieee80211_node *ni; 947127772Ssam 948138568Ssam IEEE80211_NODE_LOCK(nt); 949138568Ssam ni = _ieee80211_find_node(nt, macaddr); 950138568Ssam IEEE80211_NODE_UNLOCK(nt); 951116742Ssam return ni; 952116742Ssam} 953116742Ssam 954116742Ssam/* 955138568Ssam * Fake up a node; this handles node discovery in adhoc mode. 956138568Ssam * Note that for the driver's benefit we we treat this like 957138568Ssam * an association so the driver has an opportunity to setup 958138568Ssam * it's private state. 959138568Ssam */ 960138568Ssamstruct ieee80211_node * 961138568Ssamieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 962170530Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 963138568Ssam{ 964138568Ssam struct ieee80211com *ic = nt->nt_ic; 965138568Ssam struct ieee80211_node *ni; 966138568Ssam 967153073Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 968153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 969138568Ssam ni = ieee80211_dup_bss(nt, macaddr); 970138568Ssam if (ni != NULL) { 971138568Ssam /* XXX no rate negotiation; just dup */ 972138568Ssam ni->ni_rates = ic->ic_bss->ni_rates; 973139524Ssam if (ic->ic_newassoc != NULL) 974148307Ssam ic->ic_newassoc(ni, 1); 975153404Ssam if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 976153404Ssam /* 977170530Ssam * In adhoc demo mode there are no management 978170530Ssam * frames to use to discover neighbor capabilities, 979170530Ssam * so blindly propagate the local configuration 980170530Ssam * so we can do interesting things (e.g. use 981170530Ssam * WME to disable ACK's). 982153404Ssam */ 983153404Ssam if (ic->ic_flags & IEEE80211_F_WME) 984153404Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 985170530Ssam if (ic->ic_flags & IEEE80211_F_FF) 986170530Ssam ni->ni_flags |= IEEE80211_NODE_FF; 987153404Ssam } 988170530Ssam /* XXX not right for 802.1x/WPA */ 989170530Ssam ieee80211_node_authorize(ni); 990138568Ssam } 991138568Ssam return ni; 992138568Ssam} 993138568Ssam 994148936Ssamvoid 995153073Ssamieee80211_init_neighbor(struct ieee80211_node *ni, 996153073Ssam const struct ieee80211_frame *wh, 997153073Ssam const struct ieee80211_scanparams *sp) 998153073Ssam{ 999153073Ssam ni->ni_esslen = sp->ssid[1]; 1000153073Ssam memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 1001153073Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 1002153073Ssam memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 1003153073Ssam ni->ni_intval = sp->bintval; 1004153073Ssam ni->ni_capinfo = sp->capinfo; 1005153073Ssam ni->ni_chan = ni->ni_ic->ic_curchan; 1006153073Ssam ni->ni_fhdwell = sp->fhdwell; 1007153073Ssam ni->ni_fhindex = sp->fhindex; 1008153073Ssam ni->ni_erp = sp->erp; 1009153073Ssam ni->ni_timoff = sp->timoff; 1010153073Ssam if (sp->wme != NULL) 1011153073Ssam ieee80211_saveie(&ni->ni_wme_ie, sp->wme); 1012153073Ssam if (sp->wpa != NULL) 1013153073Ssam ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa); 1014170530Ssam if (sp->rsn != NULL) 1015170530Ssam ieee80211_saveie(&ni->ni_rsn_ie, sp->rsn); 1016170530Ssam if (sp->ath != NULL) 1017170530Ssam ieee80211_saveath(ni, sp->ath); 1018153073Ssam 1019153073Ssam /* NB: must be after ni_chan is setup */ 1020165887Ssam ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1021165887Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1022165887Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1023153073Ssam} 1024153073Ssam 1025148936Ssam/* 1026148936Ssam * Do node discovery in adhoc mode on receipt of a beacon 1027148936Ssam * or probe response frame. Note that for the driver's 1028148936Ssam * benefit we we treat this like an association so the 1029148936Ssam * driver has an opportunity to setup it's private state. 1030148936Ssam */ 1031148936Ssamstruct ieee80211_node * 1032148936Ssamieee80211_add_neighbor(struct ieee80211com *ic, 1033148936Ssam const struct ieee80211_frame *wh, 1034148936Ssam const struct ieee80211_scanparams *sp) 1035148936Ssam{ 1036148936Ssam struct ieee80211_node *ni; 1037148936Ssam 1038153073Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1039153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1040148936Ssam ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */ 1041148936Ssam if (ni != NULL) { 1042153073Ssam ieee80211_init_neighbor(ni, wh, sp); 1043148936Ssam if (ic->ic_newassoc != NULL) 1044148936Ssam ic->ic_newassoc(ni, 1); 1045148936Ssam /* XXX not right for 802.1x/WPA */ 1046148936Ssam ieee80211_node_authorize(ni); 1047148936Ssam } 1048148936Ssam return ni; 1049148936Ssam} 1050148936Ssam 1051148863Ssam#define IS_CTL(wh) \ 1052148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1053148863Ssam#define IS_PSPOLL(wh) \ 1054148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1055170530Ssam#define IS_BAR(wh) \ 1056170530Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1057170530Ssam 1058138568Ssam/* 1059138568Ssam * Locate the node for sender, track state, and then pass the 1060138568Ssam * (referenced) node up to the 802.11 layer for its use. We 1061138568Ssam * are required to pass some node so we fall back to ic_bss 1062138568Ssam * when this frame is from an unknown sender. The 802.11 layer 1063138568Ssam * knows this means the sender wasn't in the node table and 1064138568Ssam * acts accordingly. 1065138568Ssam */ 1066138568Ssamstruct ieee80211_node * 1067138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1068138568Ssamieee80211_find_rxnode_debug(struct ieee80211com *ic, 1069138568Ssam const struct ieee80211_frame_min *wh, const char *func, int line) 1070138568Ssam#else 1071138568Ssamieee80211_find_rxnode(struct ieee80211com *ic, 1072138568Ssam const struct ieee80211_frame_min *wh) 1073138568Ssam#endif 1074138568Ssam{ 1075138568Ssam struct ieee80211_node_table *nt; 1076138568Ssam struct ieee80211_node *ni; 1077138568Ssam 1078138568Ssam /* XXX check ic_bss first in station mode */ 1079138568Ssam /* XXX 4-address frames? */ 1080170530Ssam nt = &ic->ic_sta; 1081138568Ssam IEEE80211_NODE_LOCK(nt); 1082170530Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1083138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1084138568Ssam else 1085138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1086148863Ssam if (ni == NULL) 1087148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1088138568Ssam IEEE80211_NODE_UNLOCK(nt); 1089138568Ssam 1090148863Ssam return ni; 1091148863Ssam} 1092148863Ssam 1093148863Ssam/* 1094148863Ssam * Like ieee80211_find_rxnode but use the supplied h/w 1095148863Ssam * key index as a hint to locate the node in the key 1096148863Ssam * mapping table. If an entry is present at the key 1097148863Ssam * index we return it; otherwise do a normal lookup and 1098148863Ssam * update the mapping table if the station has a unicast 1099148863Ssam * key assigned to it. 1100148863Ssam */ 1101148863Ssamstruct ieee80211_node * 1102148863Ssam#ifdef IEEE80211_DEBUG_REFCNT 1103148863Ssamieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1104148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1105148863Ssam const char *func, int line) 1106148863Ssam#else 1107148863Ssamieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1108148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1109148863Ssam#endif 1110148863Ssam{ 1111148863Ssam struct ieee80211_node_table *nt; 1112148863Ssam struct ieee80211_node *ni; 1113148863Ssam 1114170530Ssam nt = &ic->ic_sta; 1115148863Ssam IEEE80211_NODE_LOCK(nt); 1116148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1117148863Ssam ni = nt->nt_keyixmap[keyix]; 1118148863Ssam else 1119148863Ssam ni = NULL; 1120148863Ssam if (ni == NULL) { 1121170530Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1122148863Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1123148863Ssam else 1124148863Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1125148863Ssam if (ni == NULL) 1126148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1127148863Ssam if (nt->nt_keyixmap != NULL) { 1128148863Ssam /* 1129148863Ssam * If the station has a unicast key cache slot 1130148863Ssam * assigned update the key->node mapping table. 1131148863Ssam */ 1132148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1133148863Ssam /* XXX can keyixmap[keyix] != NULL? */ 1134148863Ssam if (keyix < nt->nt_keyixmax && 1135148863Ssam nt->nt_keyixmap[keyix] == NULL) { 1136148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1137148863Ssam "%s: add key map entry %p<%s> refcnt %d\n", 1138148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1139148863Ssam ieee80211_node_refcnt(ni)+1); 1140148863Ssam nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1141148863Ssam } 1142148863Ssam } 1143170530Ssam } else 1144148863Ssam ieee80211_ref_node(ni); 1145148863Ssam IEEE80211_NODE_UNLOCK(nt); 1146148863Ssam 1147148863Ssam return ni; 1148148863Ssam} 1149170530Ssam#undef IS_BAR 1150138568Ssam#undef IS_PSPOLL 1151138568Ssam#undef IS_CTL 1152138568Ssam 1153138568Ssam/* 1154127772Ssam * Return a reference to the appropriate node for sending 1155127772Ssam * a data frame. This handles node discovery in adhoc networks. 1156127772Ssam */ 1157127772Ssamstruct ieee80211_node * 1158138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1159170530Ssamieee80211_find_txnode_debug(struct ieee80211com *ic, const uint8_t *macaddr, 1160138568Ssam const char *func, int line) 1161138568Ssam#else 1162170530Ssamieee80211_find_txnode(struct ieee80211com *ic, const uint8_t *macaddr) 1163138568Ssam#endif 1164127772Ssam{ 1165140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1166127772Ssam struct ieee80211_node *ni; 1167127772Ssam 1168127772Ssam /* 1169127772Ssam * The destination address should be in the node table 1170148863Ssam * unless this is a multicast/broadcast frame. We can 1171148863Ssam * also optimize station mode operation, all frames go 1172148863Ssam * to the bss node. 1173127772Ssam */ 1174127772Ssam /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1175138568Ssam IEEE80211_NODE_LOCK(nt); 1176148863Ssam if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1177148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1178158121Ssam else { 1179148863Ssam ni = _ieee80211_find_node(nt, macaddr); 1180158121Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1181158121Ssam (ni != NULL && ni->ni_associd == 0)) { 1182158121Ssam /* 1183158121Ssam * Station is not associated; don't permit the 1184158121Ssam * data frame to be sent by returning NULL. This 1185158121Ssam * is kinda a kludge but the least intrusive way 1186158121Ssam * to add this check into all drivers. 1187158121Ssam */ 1188158121Ssam ieee80211_unref_node(&ni); /* NB: null's ni */ 1189158121Ssam } 1190158121Ssam } 1191138568Ssam IEEE80211_NODE_UNLOCK(nt); 1192138568Ssam 1193138568Ssam if (ni == NULL) { 1194138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS || 1195140497Ssam ic->ic_opmode == IEEE80211_M_AHDEMO) { 1196140497Ssam /* 1197140497Ssam * In adhoc mode cons up a node for the destination. 1198140497Ssam * Note that we need an additional reference for the 1199140497Ssam * caller to be consistent with _ieee80211_find_node. 1200140497Ssam */ 1201138568Ssam ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1202140497Ssam if (ni != NULL) 1203140497Ssam (void) ieee80211_ref_node(ni); 1204140497Ssam } else { 1205138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1206138568Ssam "[%s] no node, discard frame (%s)\n", 1207138568Ssam ether_sprintf(macaddr), __func__); 1208138568Ssam ic->ic_stats.is_tx_nonode++; 1209127772Ssam } 1210127772Ssam } 1211127772Ssam return ni; 1212127772Ssam} 1213127772Ssam 1214127772Ssam/* 1215138568Ssam * Like find but search based on the ssid too. 1216138568Ssam */ 1217138568Ssamstruct ieee80211_node * 1218138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1219138568Ssamieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1220170530Ssam const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid, 1221138568Ssam const char *func, int line) 1222138568Ssam#else 1223138568Ssamieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1224170530Ssam const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid) 1225138568Ssam#endif 1226138568Ssam{ 1227147118Ssam#define MATCH_SSID(ni, ssid, ssidlen) \ 1228147118Ssam (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0) 1229170530Ssam static const uint8_t zeromac[IEEE80211_ADDR_LEN]; 1230138568Ssam struct ieee80211_node *ni; 1231138568Ssam int hash; 1232138568Ssam 1233138568Ssam IEEE80211_NODE_LOCK(nt); 1234147118Ssam /* 1235147118Ssam * A mac address that is all zero means match only the ssid; 1236147118Ssam * otherwise we must match both. 1237147118Ssam */ 1238147118Ssam if (IEEE80211_ADDR_EQ(macaddr, zeromac)) { 1239147118Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1240147118Ssam if (MATCH_SSID(ni, ssid, ssidlen)) 1241147118Ssam break; 1242147118Ssam } 1243147118Ssam } else { 1244147118Ssam hash = IEEE80211_NODE_HASH(macaddr); 1245147118Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1246147118Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1247147118Ssam MATCH_SSID(ni, ssid, ssidlen)) 1248147118Ssam break; 1249147118Ssam } 1250147118Ssam } 1251147118Ssam if (ni != NULL) { 1252147118Ssam ieee80211_ref_node(ni); /* mark referenced */ 1253170530Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1254159139Sdds REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr), 1255147118Ssam ieee80211_node_refcnt(ni)); 1256138568Ssam } 1257138568Ssam IEEE80211_NODE_UNLOCK(nt); 1258138568Ssam return ni; 1259147118Ssam#undef MATCH_SSID 1260138568Ssam} 1261138568Ssam 1262116742Ssamstatic void 1263138568Ssam_ieee80211_free_node(struct ieee80211_node *ni) 1264116742Ssam{ 1265138568Ssam struct ieee80211com *ic = ni->ni_ic; 1266138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1267119150Ssam 1268138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1269140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 1270140766Ssam ether_sprintf(ni->ni_macaddr), 1271138568Ssam nt != NULL ? nt->nt_name : "<gone>"); 1272138568Ssam 1273138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1274138568Ssam if (nt != NULL) { 1275138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1276138568Ssam LIST_REMOVE(ni, ni_hash); 1277138568Ssam } 1278138568Ssam ic->ic_node_free(ni); 1279116742Ssam} 1280116742Ssam 1281116742Ssamvoid 1282138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1283138568Ssamieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1284138568Ssam#else 1285138568Ssamieee80211_free_node(struct ieee80211_node *ni) 1286138568Ssam#endif 1287116742Ssam{ 1288138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1289119150Ssam 1290138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1291140454Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1292140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1293138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1294138568Ssam#endif 1295148863Ssam if (nt != NULL) { 1296148863Ssam IEEE80211_NODE_LOCK(nt); 1297148863Ssam if (ieee80211_node_dectestref(ni)) { 1298148863Ssam /* 1299148863Ssam * Last reference, reclaim state. 1300148863Ssam */ 1301138568Ssam _ieee80211_free_node(ni); 1302148863Ssam } else if (ieee80211_node_refcnt(ni) == 1 && 1303148863Ssam nt->nt_keyixmap != NULL) { 1304148863Ssam ieee80211_keyix keyix; 1305148863Ssam /* 1306148863Ssam * Check for a last reference in the key mapping table. 1307148863Ssam */ 1308148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1309148863Ssam if (keyix < nt->nt_keyixmax && 1310148863Ssam nt->nt_keyixmap[keyix] == ni) { 1311148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1312148863Ssam "%s: %p<%s> clear key map entry", __func__, 1313148863Ssam ni, ether_sprintf(ni->ni_macaddr)); 1314148863Ssam nt->nt_keyixmap[keyix] = NULL; 1315148863Ssam ieee80211_node_decref(ni); /* XXX needed? */ 1316148863Ssam _ieee80211_free_node(ni); 1317148863Ssam } 1318148863Ssam } 1319148863Ssam IEEE80211_NODE_UNLOCK(nt); 1320148863Ssam } else { 1321148863Ssam if (ieee80211_node_dectestref(ni)) 1322138568Ssam _ieee80211_free_node(ni); 1323116742Ssam } 1324116742Ssam} 1325116742Ssam 1326138568Ssam/* 1327148863Ssam * Reclaim a unicast key and clear any key cache state. 1328148863Ssam */ 1329148863Ssamint 1330148863Ssamieee80211_node_delucastkey(struct ieee80211_node *ni) 1331148863Ssam{ 1332148863Ssam struct ieee80211com *ic = ni->ni_ic; 1333148863Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1334148863Ssam struct ieee80211_node *nikey; 1335148863Ssam ieee80211_keyix keyix; 1336148863Ssam int isowned, status; 1337148863Ssam 1338148863Ssam /* 1339148863Ssam * NB: We must beware of LOR here; deleting the key 1340148863Ssam * can cause the crypto layer to block traffic updates 1341148863Ssam * which can generate a LOR against the node table lock; 1342148863Ssam * grab it here and stash the key index for our use below. 1343148863Ssam * 1344148863Ssam * Must also beware of recursion on the node table lock. 1345148863Ssam * When called from node_cleanup we may already have 1346148863Ssam * the node table lock held. Unfortunately there's no 1347148863Ssam * way to separate out this path so we must do this 1348148863Ssam * conditionally. 1349148863Ssam */ 1350148863Ssam isowned = IEEE80211_NODE_IS_LOCKED(nt); 1351148863Ssam if (!isowned) 1352148863Ssam IEEE80211_NODE_LOCK(nt); 1353148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1354148863Ssam status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 1355148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1356148863Ssam nikey = nt->nt_keyixmap[keyix]; 1357148863Ssam nt->nt_keyixmap[keyix] = NULL;; 1358148863Ssam } else 1359148863Ssam nikey = NULL; 1360148863Ssam if (!isowned) 1361148863Ssam IEEE80211_NODE_UNLOCK(&ic->ic_sta); 1362148863Ssam 1363148863Ssam if (nikey != NULL) { 1364148863Ssam KASSERT(nikey == ni, 1365148863Ssam ("key map out of sync, ni %p nikey %p", ni, nikey)); 1366148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1367148863Ssam "%s: delete key map entry %p<%s> refcnt %d\n", 1368148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1369148863Ssam ieee80211_node_refcnt(ni)-1); 1370148863Ssam ieee80211_free_node(ni); 1371148863Ssam } 1372148863Ssam return status; 1373148863Ssam} 1374148863Ssam 1375148863Ssam/* 1376138568Ssam * Reclaim a node. If this is the last reference count then 1377138568Ssam * do the normal free work. Otherwise remove it from the node 1378138568Ssam * table and mark it gone by clearing the back-reference. 1379138568Ssam */ 1380138568Ssamstatic void 1381138568Ssamnode_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1382116742Ssam{ 1383148863Ssam ieee80211_keyix keyix; 1384138568Ssam 1385148863Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 1386148863Ssam 1387140766Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1388140766Ssam "%s: remove %p<%s> from %s table, refcnt %d\n", 1389140766Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1390140766Ssam nt->nt_name, ieee80211_node_refcnt(ni)-1); 1391148863Ssam /* 1392148863Ssam * Clear any entry in the unicast key mapping table. 1393148863Ssam * We need to do it here so rx lookups don't find it 1394148863Ssam * in the mapping table even if it's not in the hash 1395148863Ssam * table. We cannot depend on the mapping table entry 1396148863Ssam * being cleared because the node may not be free'd. 1397148863Ssam */ 1398148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1399148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1400148863Ssam nt->nt_keyixmap[keyix] == ni) { 1401148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1402148863Ssam "%s: %p<%s> clear key map entry\n", 1403148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr)); 1404148863Ssam nt->nt_keyixmap[keyix] = NULL; 1405148863Ssam ieee80211_node_decref(ni); /* NB: don't need free */ 1406148863Ssam } 1407138568Ssam if (!ieee80211_node_dectestref(ni)) { 1408138568Ssam /* 1409138568Ssam * Other references are present, just remove the 1410138568Ssam * node from the table so it cannot be found. When 1411138568Ssam * the references are dropped storage will be 1412140753Ssam * reclaimed. 1413138568Ssam */ 1414138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1415138568Ssam LIST_REMOVE(ni, ni_hash); 1416138568Ssam ni->ni_table = NULL; /* clear reference */ 1417138568Ssam } else 1418138568Ssam _ieee80211_free_node(ni); 1419138568Ssam} 1420138568Ssam 1421138568Ssamstatic void 1422138568Ssamieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1423138568Ssam{ 1424138568Ssam struct ieee80211com *ic = nt->nt_ic; 1425116742Ssam struct ieee80211_node *ni; 1426116742Ssam 1427138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1428138568Ssam "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1429138568Ssam 1430138568Ssam while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1431138568Ssam if (ni->ni_associd != 0) { 1432138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1433138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1434138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1435138568Ssam } 1436138568Ssam node_reclaim(nt, ni); 1437138568Ssam } 1438116742Ssam} 1439116742Ssam 1440120483Ssam/* 1441138568Ssam * Timeout inactive stations and do related housekeeping. 1442138568Ssam * Note that we cannot hold the node lock while sending a 1443138568Ssam * frame as this would lead to a LOR. Instead we use a 1444138568Ssam * generation number to mark nodes that we've scanned and 1445138568Ssam * drop the lock and restart a scan if we have to time out 1446138568Ssam * a node. Since we are single-threaded by virtue of 1447120483Ssam * controlling the inactivity timer we can be sure this will 1448120483Ssam * process each node only once. 1449120483Ssam */ 1450138568Ssamstatic void 1451138568Ssamieee80211_timeout_stations(struct ieee80211_node_table *nt) 1452116742Ssam{ 1453138568Ssam struct ieee80211com *ic = nt->nt_ic; 1454120483Ssam struct ieee80211_node *ni; 1455138568Ssam u_int gen; 1456148320Ssam int isadhoc; 1457116742Ssam 1458148320Ssam isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS || 1459148320Ssam ic->ic_opmode == IEEE80211_M_AHDEMO); 1460138568Ssam IEEE80211_SCAN_LOCK(nt); 1461154532Ssam gen = ++nt->nt_scangen; 1462120483Ssamrestart: 1463138568Ssam IEEE80211_NODE_LOCK(nt); 1464138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1465120483Ssam if (ni->ni_scangen == gen) /* previously handled */ 1466120483Ssam continue; 1467120483Ssam ni->ni_scangen = gen; 1468138568Ssam /* 1469147788Ssam * Ignore entries for which have yet to receive an 1470147788Ssam * authentication frame. These are transient and 1471147788Ssam * will be reclaimed when the last reference to them 1472147788Ssam * goes away (when frame xmits complete). 1473147788Ssam */ 1474170530Ssam if ((ic->ic_opmode == IEEE80211_M_HOSTAP || 1475170530Ssam ic->ic_opmode == IEEE80211_M_STA) && 1476148323Ssam (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1477147788Ssam continue; 1478147788Ssam /* 1479138568Ssam * Free fragment if not needed anymore 1480138568Ssam * (last fragment older than 1s). 1481138568Ssam * XXX doesn't belong here 1482138568Ssam */ 1483138568Ssam if (ni->ni_rxfrag[0] != NULL && 1484138568Ssam ticks > ni->ni_rxfragstamp + hz) { 1485138568Ssam m_freem(ni->ni_rxfrag[0]); 1486138568Ssam ni->ni_rxfrag[0] = NULL; 1487138568Ssam } 1488172062Ssam if (ni->ni_inact > 0) 1489172062Ssam ni->ni_inact--; 1490140498Ssam /* 1491140498Ssam * Special case ourself; we may be idle for extended periods 1492140498Ssam * of time and regardless reclaiming our state is wrong. 1493140498Ssam */ 1494140498Ssam if (ni == ic->ic_bss) 1495140498Ssam continue; 1496148320Ssam if (ni->ni_associd != 0 || isadhoc) { 1497119150Ssam /* 1498170530Ssam * Age frames on the power save queue. 1499138568Ssam */ 1500170530Ssam if (ieee80211_node_saveq_age(ni) != 0 && 1501170530Ssam IEEE80211_NODE_SAVEQ_QLEN(ni) == 0 && 1502170530Ssam ic->ic_set_tim != NULL) 1503170530Ssam ic->ic_set_tim(ni, 0); 1504138568Ssam /* 1505138568Ssam * Probe the station before time it out. We 1506138568Ssam * send a null data frame which may not be 1507138568Ssam * universally supported by drivers (need it 1508138568Ssam * for ps-poll support so it should be...). 1509170530Ssam * 1510170530Ssam * XXX don't probe the station unless we've 1511170530Ssam * received a frame from them (and have 1512170530Ssam * some idea of the rates they are capable 1513170530Ssam * of); this will get fixed more properly 1514170530Ssam * soon with better handling of the rate set. 1515138568Ssam */ 1516172062Ssam if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) && 1517172062Ssam (0 < ni->ni_inact && 1518172062Ssam ni->ni_inact <= ic->ic_inact_probe) && 1519170530Ssam ni->ni_rates.rs_nrates != 0) { 1520148320Ssam IEEE80211_NOTE(ic, 1521148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1522148320Ssam ni, "%s", 1523148320Ssam "probe station due to inactivity"); 1524148582Ssam /* 1525148582Ssam * Grab a reference before unlocking the table 1526148582Ssam * so the node cannot be reclaimed before we 1527148582Ssam * send the frame. ieee80211_send_nulldata 1528148582Ssam * understands we've done this and reclaims the 1529148582Ssam * ref for us as needed. 1530148582Ssam */ 1531148582Ssam ieee80211_ref_node(ni); 1532138568Ssam IEEE80211_NODE_UNLOCK(nt); 1533148301Ssam ieee80211_send_nulldata(ni); 1534138568Ssam /* XXX stat? */ 1535138568Ssam goto restart; 1536138568Ssam } 1537138568Ssam } 1538172062Ssam if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) && 1539172062Ssam ni->ni_inact <= 0) { 1540148320Ssam IEEE80211_NOTE(ic, 1541148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1542148320Ssam "station timed out due to inactivity " 1543148320Ssam "(refcnt %u)", ieee80211_node_refcnt(ni)); 1544138568Ssam /* 1545138568Ssam * Send a deauthenticate frame and drop the station. 1546138568Ssam * This is somewhat complicated due to reference counts 1547138568Ssam * and locking. At this point a station will typically 1548138568Ssam * have a reference count of 1. ieee80211_node_leave 1549138568Ssam * will do a "free" of the node which will drop the 1550138568Ssam * reference count. But in the meantime a reference 1551138568Ssam * wil be held by the deauth frame. The actual reclaim 1552138568Ssam * of the node will happen either after the tx is 1553138568Ssam * completed or by ieee80211_node_leave. 1554120483Ssam * 1555138568Ssam * Separately we must drop the node lock before sending 1556170530Ssam * in case the driver takes a lock, as this can result 1557170530Ssam * in a LOR between the node lock and the driver lock. 1558119150Ssam */ 1559172229Ssam ieee80211_ref_node(ni); 1560138568Ssam IEEE80211_NODE_UNLOCK(nt); 1561138568Ssam if (ni->ni_associd != 0) { 1562138568Ssam IEEE80211_SEND_MGMT(ic, ni, 1563138568Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1564138568Ssam IEEE80211_REASON_AUTH_EXPIRE); 1565138568Ssam } 1566138568Ssam ieee80211_node_leave(ic, ni); 1567172229Ssam ieee80211_free_node(ni); 1568121180Ssam ic->ic_stats.is_node_timeout++; 1569120483Ssam goto restart; 1570120483Ssam } 1571116742Ssam } 1572138568Ssam IEEE80211_NODE_UNLOCK(nt); 1573138568Ssam 1574138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1575170530Ssam} 1576138568Ssam 1577170530Ssamvoid 1578170530Ssamieee80211_node_timeout(void *arg) 1579170530Ssam{ 1580170530Ssam struct ieee80211com *ic = arg; 1581170530Ssam 1582170530Ssam ieee80211_scan_timeout(ic); 1583170530Ssam ieee80211_timeout_stations(&ic->ic_sta); 1584170530Ssam 1585172211Ssam IEEE80211_LOCK(ic); 1586172211Ssam ieee80211_erp_timeout(ic); 1587173273Ssam ieee80211_ht_timeout(ic); 1588172211Ssam IEEE80211_UNLOCK(ic); 1589172211Ssam 1590170530Ssam callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 1591170530Ssam ieee80211_node_timeout, ic); 1592116742Ssam} 1593116742Ssam 1594116742Ssamvoid 1595138568Ssamieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1596116742Ssam{ 1597116742Ssam struct ieee80211_node *ni; 1598138568Ssam u_int gen; 1599116742Ssam 1600138568Ssam IEEE80211_SCAN_LOCK(nt); 1601154532Ssam gen = ++nt->nt_scangen; 1602138568Ssamrestart: 1603138568Ssam IEEE80211_NODE_LOCK(nt); 1604138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1605138568Ssam if (ni->ni_scangen != gen) { 1606138568Ssam ni->ni_scangen = gen; 1607138568Ssam (void) ieee80211_ref_node(ni); 1608138568Ssam IEEE80211_NODE_UNLOCK(nt); 1609138568Ssam (*f)(arg, ni); 1610138568Ssam ieee80211_free_node(ni); 1611138568Ssam goto restart; 1612138568Ssam } 1613138568Ssam } 1614138568Ssam IEEE80211_NODE_UNLOCK(nt); 1615138568Ssam 1616138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1617116742Ssam} 1618138568Ssam 1619138568Ssamvoid 1620138568Ssamieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1621138568Ssam{ 1622138568Ssam printf("0x%p: mac %s refcnt %d\n", ni, 1623138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1624138568Ssam printf("\tscangen %u authmode %u flags 0x%x\n", 1625138568Ssam ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1626138568Ssam printf("\tassocid 0x%x txpower %u vlan %u\n", 1627138568Ssam ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1628138568Ssam printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1629167439Ssam ni->ni_txseqs[IEEE80211_NONQOS_TID], 1630167439Ssam ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 1631167439Ssam ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 1632138568Ssam ni->ni_rxfragstamp); 1633170530Ssam printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 1634170530Ssam ni->ni_rstamp, ni->ni_rssi, ni->ni_noise, 1635170530Ssam ni->ni_intval, ni->ni_capinfo); 1636138568Ssam printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1637138568Ssam ether_sprintf(ni->ni_bssid), 1638138568Ssam ni->ni_esslen, ni->ni_essid, 1639138568Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 1640138568Ssam printf("\tfails %u inact %u txrate %u\n", 1641138568Ssam ni->ni_fails, ni->ni_inact, ni->ni_txrate); 1642170530Ssam printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 1643170530Ssam ni->ni_htcap, ni->ni_htparam, 1644170530Ssam ni->ni_htctlchan, ni->ni_ht2ndchan); 1645170530Ssam printf("\thtopmode %x htstbc %x chw %u\n", 1646170530Ssam ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 1647138568Ssam} 1648138568Ssam 1649138568Ssamvoid 1650138568Ssamieee80211_dump_nodes(struct ieee80211_node_table *nt) 1651138568Ssam{ 1652138568Ssam ieee80211_iterate_nodes(nt, 1653138568Ssam (ieee80211_iter_func *) ieee80211_dump_node, nt); 1654138568Ssam} 1655138568Ssam 1656172211Ssamvoid 1657172211Ssamieee80211_notify_erp(struct ieee80211com *ic) 1658172211Ssam{ 1659172211Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) 1660172211Ssam ieee80211_beacon_notify(ic, IEEE80211_BEACON_ERP); 1661172211Ssam} 1662172211Ssam 1663138568Ssam/* 1664138568Ssam * Handle a station joining an 11g network. 1665138568Ssam */ 1666138568Ssamstatic void 1667138568Ssamieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1668138568Ssam{ 1669138568Ssam 1670173273Ssam IEEE80211_LOCK_ASSERT(ic); 1671173273Ssam 1672138568Ssam /* 1673138568Ssam * Station isn't capable of short slot time. Bump 1674138568Ssam * the count of long slot time stations and disable 1675138568Ssam * use of short slot time. Note that the actual switch 1676138568Ssam * over to long slot time use may not occur until the 1677138568Ssam * next beacon transmission (per sec. 7.3.1.4 of 11g). 1678138568Ssam */ 1679138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1680138568Ssam ic->ic_longslotsta++; 1681172211Ssam IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1682172211Ssam "station needs long slot time, count %d", 1683172211Ssam ic->ic_longslotsta); 1684138568Ssam /* XXX vap's w/ conflicting needs won't work */ 1685170530Ssam if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 1686170530Ssam /* 1687170530Ssam * Don't force slot time when switched to turbo 1688170530Ssam * mode as non-ERP stations won't be present; this 1689170530Ssam * need only be done when on the normal G channel. 1690170530Ssam */ 1691170530Ssam ieee80211_set_shortslottime(ic, 0); 1692170530Ssam } 1693138568Ssam } 1694138568Ssam /* 1695138568Ssam * If the new station is not an ERP station 1696138568Ssam * then bump the counter and enable protection 1697138568Ssam * if configured. 1698138568Ssam */ 1699138568Ssam if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 1700138568Ssam ic->ic_nonerpsta++; 1701172211Ssam IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1702172211Ssam "station is !ERP, %d non-ERP stations associated", 1703172211Ssam ic->ic_nonerpsta); 1704138568Ssam /* 1705138568Ssam * If station does not support short preamble 1706138568Ssam * then we must enable use of Barker preamble. 1707138568Ssam */ 1708138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 1709172211Ssam IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1710172211Ssam "%s", "station needs long preamble"); 1711138568Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1712138568Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1713138568Ssam } 1714172211Ssam /* 1715172211Ssam * If protection is configured, enable it. 1716172211Ssam */ 1717172211Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE && 1718172211Ssam ic->ic_nonerpsta == 1 && 1719172211Ssam (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 1720172211Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1721172211Ssam "%s: enable use of protection\n", __func__); 1722172211Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1723172211Ssam ieee80211_notify_erp(ic); 1724172211Ssam } 1725138568Ssam } else 1726138568Ssam ni->ni_flags |= IEEE80211_NODE_ERP; 1727138568Ssam} 1728138568Ssam 1729138568Ssamvoid 1730138568Ssamieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 1731138568Ssam{ 1732138568Ssam int newassoc; 1733138568Ssam 1734138568Ssam if (ni->ni_associd == 0) { 1735170530Ssam uint16_t aid; 1736138568Ssam 1737173273Ssam IEEE80211_LOCK(ic); 1738138568Ssam /* 1739138568Ssam * It would be good to search the bitmap 1740138568Ssam * more efficiently, but this will do for now. 1741138568Ssam */ 1742138568Ssam for (aid = 1; aid < ic->ic_max_aid; aid++) { 1743138568Ssam if (!IEEE80211_AID_ISSET(aid, 1744138568Ssam ic->ic_aid_bitmap)) 1745138568Ssam break; 1746138568Ssam } 1747138568Ssam if (aid >= ic->ic_max_aid) { 1748173273Ssam IEEE80211_UNLOCK(ic); 1749138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, 1750138568Ssam IEEE80211_REASON_ASSOC_TOOMANY); 1751138568Ssam ieee80211_node_leave(ic, ni); 1752138568Ssam return; 1753138568Ssam } 1754138568Ssam ni->ni_associd = aid | 0xc000; 1755173273Ssam ni->ni_jointime = time_uptime; 1756138568Ssam IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 1757138568Ssam ic->ic_sta_assoc++; 1758173273Ssam 1759173273Ssam if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 1760173273Ssam ieee80211_ht_node_join(ni); 1761170530Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1762170530Ssam IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 1763138568Ssam ieee80211_node_join_11g(ic, ni); 1764173273Ssam IEEE80211_UNLOCK(ic); 1765173273Ssam 1766173273Ssam newassoc = 1; 1767138568Ssam } else 1768138568Ssam newassoc = 0; 1769138568Ssam 1770172211Ssam IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 1771173273Ssam "station %sassociated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s", 1772172211Ssam newassoc ? "" : "re", 1773139523Ssam IEEE80211_NODE_AID(ni), 1774139523Ssam ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 1775139523Ssam ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 1776139523Ssam ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 1777170530Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1778170530Ssam ni->ni_flags & IEEE80211_NODE_HT ? 1779170530Ssam (ni->ni_chw == 20 ? ", HT20" : ", HT40") : "", 1780173273Ssam ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1781170530Ssam IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_FF) ? 1782170530Ssam ", fast-frames" : "", 1783170530Ssam IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_TURBOP) ? 1784170530Ssam ", turbo" : "" 1785139523Ssam ); 1786138568Ssam 1787138568Ssam /* give driver a chance to setup state like ni_txrate */ 1788139524Ssam if (ic->ic_newassoc != NULL) 1789148307Ssam ic->ic_newassoc(ni, newassoc); 1790138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 1791138568Ssam /* tell the authenticator about new station */ 1792138568Ssam if (ic->ic_auth->ia_node_join != NULL) 1793138568Ssam ic->ic_auth->ia_node_join(ic, ni); 1794138568Ssam ieee80211_notify_node_join(ic, ni, newassoc); 1795138568Ssam} 1796138568Ssam 1797172211Ssamstatic void 1798172211Ssamdisable_protection(struct ieee80211com *ic) 1799172211Ssam{ 1800172211Ssam KASSERT(ic->ic_nonerpsta == 0 && 1801172211Ssam (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, 1802172211Ssam ("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta, 1803172211Ssam ic->ic_flags_ext)); 1804172211Ssam 1805172211Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1806172211Ssam /* XXX verify mode? */ 1807172211Ssam if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 1808172211Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1809172211Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1810172211Ssam } 1811172211Ssam ieee80211_notify_erp(ic); 1812172211Ssam} 1813172211Ssam 1814138568Ssam/* 1815138568Ssam * Handle a station leaving an 11g network. 1816138568Ssam */ 1817138568Ssamstatic void 1818138568Ssamieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1819138568Ssam{ 1820138568Ssam 1821173273Ssam IEEE80211_LOCK_ASSERT(ic); 1822173273Ssam 1823170530Ssam KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 1824170530Ssam ("not in 11g, bss %u:0x%x, curmode %u", ic->ic_bsschan->ic_freq, 1825170530Ssam ic->ic_bsschan->ic_flags, ic->ic_curmode)); 1826138568Ssam 1827138568Ssam /* 1828138568Ssam * If a long slot station do the slot time bookkeeping. 1829138568Ssam */ 1830138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1831138568Ssam KASSERT(ic->ic_longslotsta > 0, 1832138568Ssam ("bogus long slot station count %d", ic->ic_longslotsta)); 1833138568Ssam ic->ic_longslotsta--; 1834172211Ssam IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1835172211Ssam "long slot time station leaves, count now %d", 1836172211Ssam ic->ic_longslotsta); 1837138568Ssam if (ic->ic_longslotsta == 0) { 1838138568Ssam /* 1839138568Ssam * Re-enable use of short slot time if supported 1840138568Ssam * and not operating in IBSS mode (per spec). 1841138568Ssam */ 1842138568Ssam if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 1843138568Ssam ic->ic_opmode != IEEE80211_M_IBSS) { 1844138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1845138568Ssam "%s: re-enable use of short slot time\n", 1846138568Ssam __func__); 1847138568Ssam ieee80211_set_shortslottime(ic, 1); 1848138568Ssam } 1849138568Ssam } 1850138568Ssam } 1851138568Ssam /* 1852138568Ssam * If a non-ERP station do the protection-related bookkeeping. 1853138568Ssam */ 1854138568Ssam if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 1855138568Ssam KASSERT(ic->ic_nonerpsta > 0, 1856138568Ssam ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 1857138568Ssam ic->ic_nonerpsta--; 1858172211Ssam IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni, 1859172211Ssam "non-ERP station leaves, count now %d%s", ic->ic_nonerpsta, 1860172211Ssam (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ? 1861172211Ssam " (non-ERP sta present)" : ""); 1862172211Ssam if (ic->ic_nonerpsta == 0 && 1863172211Ssam (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { 1864138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1865138568Ssam "%s: disable use of protection\n", __func__); 1866172211Ssam disable_protection(ic); 1867138568Ssam } 1868138568Ssam } 1869138568Ssam} 1870138568Ssam 1871138568Ssam/* 1872172211Ssam * Time out presence of an overlapping bss with non-ERP 1873172211Ssam * stations. When operating in hostap mode we listen for 1874172211Ssam * beacons from other stations and if we identify a non-ERP 1875172211Ssam * station is present we enable protection. To identify 1876172211Ssam * when all non-ERP stations are gone we time out this 1877172211Ssam * condition. 1878172211Ssam */ 1879172211Ssamstatic void 1880172211Ssamieee80211_erp_timeout(struct ieee80211com *ic) 1881172211Ssam{ 1882172211Ssam 1883172211Ssam IEEE80211_LOCK_ASSERT(ic); 1884172211Ssam 1885172211Ssam if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) && 1886172211Ssam time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { 1887172211Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1888172211Ssam "%s\n", "age out non-ERP sta present on channel"); 1889172211Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 1890172211Ssam if (ic->ic_nonerpsta == 0) 1891172211Ssam disable_protection(ic); 1892172211Ssam } 1893172211Ssam} 1894172211Ssam 1895172211Ssam/* 1896138568Ssam * Handle bookkeeping for station deauthentication/disassociation 1897138568Ssam * when operating as an ap. 1898138568Ssam */ 1899138568Ssamvoid 1900138568Ssamieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 1901138568Ssam{ 1902140499Ssam struct ieee80211_node_table *nt = ni->ni_table; 1903138568Ssam 1904172211Ssam IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, 1905172211Ssam "station with aid %d leaves", IEEE80211_NODE_AID(ni)); 1906138568Ssam 1907170530Ssam KASSERT(ic->ic_opmode != IEEE80211_M_STA, 1908138568Ssam ("unexpected operating mode %u", ic->ic_opmode)); 1909138568Ssam /* 1910138568Ssam * If node wasn't previously associated all 1911138568Ssam * we need to do is reclaim the reference. 1912138568Ssam */ 1913138568Ssam /* XXX ibss mode bypasses 11g and notification */ 1914138568Ssam if (ni->ni_associd == 0) 1915138568Ssam goto done; 1916138568Ssam /* 1917138568Ssam * Tell the authenticator the station is leaving. 1918138568Ssam * Note that we must do this before yanking the 1919138568Ssam * association id as the authenticator uses the 1920138568Ssam * associd to locate it's state block. 1921138568Ssam */ 1922138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1923138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1924173273Ssam 1925173273Ssam IEEE80211_LOCK(ic); 1926138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1927138568Ssam ni->ni_associd = 0; 1928138568Ssam ic->ic_sta_assoc--; 1929138568Ssam 1930173273Ssam if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) 1931173273Ssam ieee80211_ht_node_leave(ni); 1932170530Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1933170530Ssam IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 1934138568Ssam ieee80211_node_leave_11g(ic, ni); 1935173273Ssam IEEE80211_UNLOCK(ic); 1936138568Ssam /* 1937138568Ssam * Cleanup station state. In particular clear various 1938138568Ssam * state that might otherwise be reused if the node 1939138568Ssam * is reused before the reference count goes to zero 1940138568Ssam * (and memory is reclaimed). 1941138568Ssam */ 1942138568Ssam ieee80211_sta_leave(ic, ni); 1943138568Ssamdone: 1944140499Ssam /* 1945140499Ssam * Remove the node from any table it's recorded in and 1946140499Ssam * drop the caller's reference. Removal from the table 1947140499Ssam * is important to insure the node is not reprocessed 1948140499Ssam * for inactivity. 1949140499Ssam */ 1950140499Ssam if (nt != NULL) { 1951140499Ssam IEEE80211_NODE_LOCK(nt); 1952140499Ssam node_reclaim(nt, ni); 1953140499Ssam IEEE80211_NODE_UNLOCK(nt); 1954140499Ssam } else 1955140499Ssam ieee80211_free_node(ni); 1956138568Ssam} 1957138568Ssam 1958170530Ssamint8_t 1959138568Ssamieee80211_getrssi(struct ieee80211com *ic) 1960138568Ssam{ 1961138568Ssam#define NZ(x) ((x) == 0 ? 1 : (x)) 1962140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1963170530Ssam int rssi_samples; 1964170530Ssam int32_t rssi_total; 1965138568Ssam struct ieee80211_node *ni; 1966138568Ssam 1967138568Ssam rssi_total = 0; 1968138568Ssam rssi_samples = 0; 1969138568Ssam switch (ic->ic_opmode) { 1970138568Ssam case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 1971138568Ssam case IEEE80211_M_AHDEMO: /* average of all neighbors */ 1972138568Ssam case IEEE80211_M_HOSTAP: /* average of all associated stations */ 1973138568Ssam /* XXX locking */ 1974140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 1975170530Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP || 1976170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS)) { 1977170530Ssam int8_t rssi = ic->ic_node_getrssi(ni); 1978170530Ssam if (rssi != 0) { 1979170530Ssam rssi_samples++; 1980170530Ssam rssi_total += rssi; 1981170530Ssam } 1982138568Ssam } 1983138568Ssam break; 1984138568Ssam case IEEE80211_M_MONITOR: /* XXX */ 1985138568Ssam case IEEE80211_M_STA: /* use stats from associated ap */ 1986138568Ssam default: 1987138568Ssam if (ic->ic_bss != NULL) 1988138568Ssam rssi_total = ic->ic_node_getrssi(ic->ic_bss); 1989138568Ssam rssi_samples = 1; 1990138568Ssam break; 1991138568Ssam } 1992138568Ssam return rssi_total / NZ(rssi_samples); 1993138568Ssam#undef NZ 1994138568Ssam} 1995138568Ssam 1996170530Ssamvoid 1997170530Ssamieee80211_getsignal(struct ieee80211com *ic, int8_t *rssi, int8_t *noise) 1998138568Ssam{ 1999138568Ssam 2000170530Ssam if (ic->ic_bss == NULL) /* NB: shouldn't happen */ 2001170530Ssam return; 2002170530Ssam ic->ic_node_getsignal(ic->ic_bss, rssi, noise); 2003170530Ssam /* for non-station mode return avg'd rssi accounting */ 2004170530Ssam if (ic->ic_opmode != IEEE80211_M_STA) 2005170530Ssam *rssi = ieee80211_getrssi(ic); 2006138568Ssam} 2007138568Ssam 2008138568Ssam/* 2009138568Ssam * Node table support. 2010138568Ssam */ 2011138568Ssam 2012138568Ssamstatic void 2013138568Ssamieee80211_node_table_init(struct ieee80211com *ic, 2014138568Ssam struct ieee80211_node_table *nt, 2015170530Ssam const char *name, int inact, int keyixmax) 2016138568Ssam{ 2017138568Ssam 2018138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 2019138568Ssam "%s %s table, inact %u\n", __func__, name, inact); 2020138568Ssam 2021138568Ssam nt->nt_ic = ic; 2022138568Ssam /* XXX need unit */ 2023138568Ssam IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2024138568Ssam IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 2025138568Ssam TAILQ_INIT(&nt->nt_node); 2026138568Ssam nt->nt_name = name; 2027138568Ssam nt->nt_scangen = 1; 2028138568Ssam nt->nt_inact_init = inact; 2029148863Ssam nt->nt_keyixmax = keyixmax; 2030148863Ssam if (nt->nt_keyixmax > 0) { 2031148863Ssam MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 2032148863Ssam keyixmax * sizeof(struct ieee80211_node *), 2033148863Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 2034148863Ssam if (nt->nt_keyixmap == NULL) 2035148863Ssam if_printf(ic->ic_ifp, 2036148863Ssam "Cannot allocate key index map with %u entries\n", 2037148863Ssam keyixmax); 2038148863Ssam } else 2039148863Ssam nt->nt_keyixmap = NULL; 2040138568Ssam} 2041138568Ssam 2042170530Ssamstatic void 2043138568Ssamieee80211_node_table_reset(struct ieee80211_node_table *nt) 2044138568Ssam{ 2045138568Ssam 2046138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2047138568Ssam "%s %s table\n", __func__, nt->nt_name); 2048138568Ssam 2049138568Ssam IEEE80211_NODE_LOCK(nt); 2050138568Ssam ieee80211_free_allnodes_locked(nt); 2051138568Ssam IEEE80211_NODE_UNLOCK(nt); 2052138568Ssam} 2053138568Ssam 2054138568Ssamstatic void 2055138568Ssamieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 2056138568Ssam{ 2057138568Ssam 2058138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 2059138568Ssam "%s %s table\n", __func__, nt->nt_name); 2060138568Ssam 2061148863Ssam IEEE80211_NODE_LOCK(nt); 2062138568Ssam ieee80211_free_allnodes_locked(nt); 2063148863Ssam if (nt->nt_keyixmap != NULL) { 2064148863Ssam /* XXX verify all entries are NULL */ 2065148863Ssam int i; 2066148863Ssam for (i = 0; i < nt->nt_keyixmax; i++) 2067148863Ssam if (nt->nt_keyixmap[i] != NULL) 2068148863Ssam printf("%s: %s[%u] still active\n", __func__, 2069148863Ssam nt->nt_name, i); 2070148863Ssam FREE(nt->nt_keyixmap, M_80211_NODE); 2071148863Ssam nt->nt_keyixmap = NULL; 2072148863Ssam } 2073138568Ssam IEEE80211_SCAN_LOCK_DESTROY(nt); 2074138568Ssam IEEE80211_NODE_LOCK_DESTROY(nt); 2075138568Ssam} 2076