ieee80211_node.c revision 172063
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 172063 2007-09-06 00:08:02Z 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); 79138568Ssam 80127876SsamMALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 81120481Ssam 82116742Ssamvoid 83138568Ssamieee80211_node_attach(struct ieee80211com *ic) 84116742Ssam{ 85116742Ssam 86138568Ssam ic->ic_node_alloc = node_alloc; 87138568Ssam ic->ic_node_free = node_free; 88138568Ssam ic->ic_node_cleanup = node_cleanup; 89138568Ssam ic->ic_node_getrssi = node_getrssi; 90170530Ssam ic->ic_node_getsignal = node_getsignal; 91138568Ssam 92138568Ssam /* default station inactivity timer setings */ 93138568Ssam ic->ic_inact_init = IEEE80211_INACT_INIT; 94138568Ssam ic->ic_inact_auth = IEEE80211_INACT_AUTH; 95138568Ssam ic->ic_inact_run = IEEE80211_INACT_RUN; 96138568Ssam ic->ic_inact_probe = IEEE80211_INACT_PROBE; 97138568Ssam 98170530Ssam callout_init(&ic->ic_inact, CALLOUT_MPSAFE); 99170530Ssam 100148863Ssam /* NB: driver should override */ 101148863Ssam ic->ic_max_aid = IEEE80211_AID_DEF; 102172062Ssam 103172062Ssam ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ 104148863Ssam} 105148863Ssam 106148863Ssamvoid 107148863Ssamieee80211_node_lateattach(struct ieee80211com *ic) 108148863Ssam{ 109148863Ssam struct ieee80211_rsnparms *rsn; 110148863Ssam 111148863Ssam if (ic->ic_max_aid > IEEE80211_AID_MAX) 112138568Ssam ic->ic_max_aid = IEEE80211_AID_MAX; 113170530Ssam MALLOC(ic->ic_aid_bitmap, uint32_t *, 114170530Ssam howmany(ic->ic_max_aid, 32) * sizeof(uint32_t), 115170530Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 116138568Ssam if (ic->ic_aid_bitmap == NULL) { 117138568Ssam /* XXX no way to recover */ 118138568Ssam printf("%s: no memory for AID bitmap!\n", __func__); 119138568Ssam ic->ic_max_aid = 0; 120138568Ssam } 121138568Ssam 122148863Ssam ieee80211_node_table_init(ic, &ic->ic_sta, "station", 123170530Ssam IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix); 124118887Ssam 125148863Ssam ieee80211_reset_bss(ic); 126138568Ssam /* 127138568Ssam * Setup "global settings" in the bss node so that 128138568Ssam * each new station automatically inherits them. 129138568Ssam */ 130148863Ssam rsn = &ic->ic_bss->ni_rsn; 131138568Ssam /* WEP, TKIP, and AES-CCM are always supported */ 132138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP; 133138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP; 134138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM; 135138568Ssam if (ic->ic_caps & IEEE80211_C_AES) 136138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB; 137138568Ssam if (ic->ic_caps & IEEE80211_C_CKIP) 138138568Ssam rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP; 139138568Ssam /* 140138568Ssam * Default unicast cipher to WEP for 802.1x use. If 141138568Ssam * WPA is enabled the management code will set these 142138568Ssam * values to reflect. 143138568Ssam */ 144138568Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP; 145138568Ssam rsn->rsn_ucastkeylen = 104 / NBBY; 146138568Ssam /* 147138568Ssam * WPA says the multicast cipher is the lowest unicast 148138568Ssam * cipher supported. But we skip WEP which would 149138568Ssam * otherwise be used based on this criteria. 150138568Ssam */ 151138568Ssam rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP; 152138568Ssam rsn->rsn_mcastkeylen = 128 / NBBY; 153138568Ssam 154138568Ssam /* 155138568Ssam * We support both WPA-PSK and 802.1x; the one used 156138568Ssam * is determined by the authentication mode and the 157138568Ssam * setting of the PSK state. 158138568Ssam */ 159138568Ssam rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK; 160138568Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 161138568Ssam 162148863Ssam ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode); 163116742Ssam} 164116742Ssam 165116742Ssamvoid 166138568Ssamieee80211_node_detach(struct ieee80211com *ic) 167116742Ssam{ 168116742Ssam 169138568Ssam if (ic->ic_bss != NULL) { 170138568Ssam ieee80211_free_node(ic->ic_bss); 171138568Ssam ic->ic_bss = NULL; 172138568Ssam } 173140753Ssam ieee80211_node_table_cleanup(&ic->ic_sta); 174138568Ssam if (ic->ic_aid_bitmap != NULL) { 175170530Ssam FREE(ic->ic_aid_bitmap, M_80211_NODE); 176138568Ssam ic->ic_aid_bitmap = NULL; 177138568Ssam } 178116742Ssam} 179116742Ssam 180138568Ssam/* 181138568Ssam * Port authorize/unauthorize interfaces for use by an authenticator. 182138568Ssam */ 183138568Ssam 184138568Ssamvoid 185148302Ssamieee80211_node_authorize(struct ieee80211_node *ni) 186138568Ssam{ 187148302Ssam struct ieee80211com *ic = ni->ni_ic; 188148302Ssam 189138568Ssam ni->ni_flags |= IEEE80211_NODE_AUTH; 190139528Ssam ni->ni_inact_reload = ic->ic_inact_run; 191172062Ssam ni->ni_inact = ni->ni_inact_reload; 192138568Ssam} 193138568Ssam 194138568Ssamvoid 195148302Ssamieee80211_node_unauthorize(struct ieee80211_node *ni) 196138568Ssam{ 197172063Ssam struct ieee80211com *ic = ni->ni_ic; 198172063Ssam 199138568Ssam ni->ni_flags &= ~IEEE80211_NODE_AUTH; 200172062Ssam ni->ni_inact_reload = ic->ic_inact_auth; 201172062Ssam if (ni->ni_inact > ni->ni_inact_reload) 202172062Ssam ni->ni_inact = ni->ni_inact_reload; 203138568Ssam} 204138568Ssam 205116742Ssam/* 206138568Ssam * Set/change the channel. The rate set is also updated as 207138568Ssam * to insure a consistent view by drivers. 208138568Ssam */ 209153351Ssamstatic void 210170530Ssamieee80211_node_set_chan(struct ieee80211com *ic, struct ieee80211_node *ni) 211138568Ssam{ 212170530Ssam struct ieee80211_channel *chan = ic->ic_bsschan; 213170530Ssam 214170530Ssam#if 0 215170530Ssam KASSERT(chan != IEEE80211_CHAN_ANYC, ("bss channel not setup")); 216170530Ssam#else 217153351Ssam if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */ 218153351Ssam chan = ic->ic_curchan; 219170530Ssam#endif 220138568Ssam ni->ni_chan = chan; 221170530Ssam if (IEEE80211_IS_CHAN_HT(chan)) { 222170530Ssam /* 223170530Ssam * XXX Gotta be careful here; the rate set returned by 224170530Ssam * ieee80211_get_suprates is actually any HT rate 225170530Ssam * set so blindly copying it will be bad. We must 226170530Ssam * install the legacy rate est in ni_rates and the 227170530Ssam * HT rate set in ni_htrates. 228170530Ssam */ 229170530Ssam ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 230170530Ssam } 231165569Ssam ni->ni_rates = *ieee80211_get_suprates(ic, chan); 232138568Ssam} 233138568Ssam 234138568Ssam/* 235156358Ssam * Probe the curent channel, if allowed, while scanning. 236156358Ssam * If the channel is not marked passive-only then send 237156358Ssam * a probe request immediately. Otherwise mark state and 238156358Ssam * listen for beacons on the channel; if we receive something 239156358Ssam * then we'll transmit a probe request. 240156358Ssam */ 241156358Ssamvoid 242156358Ssamieee80211_probe_curchan(struct ieee80211com *ic, int force) 243156358Ssam{ 244156358Ssam struct ifnet *ifp = ic->ic_ifp; 245156358Ssam 246156358Ssam if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 || force) { 247156358Ssam /* 248156358Ssam * XXX send both broadcast+directed probe request 249156358Ssam */ 250156358Ssam ieee80211_send_probereq(ic->ic_bss, 251156358Ssam ic->ic_myaddr, ifp->if_broadcastaddr, 252156358Ssam ifp->if_broadcastaddr, 253170530Ssam ic->ic_des_ssid[0].ssid, ic->ic_des_ssid[0].len, 254156358Ssam ic->ic_opt_ie, ic->ic_opt_ie_len); 255156358Ssam } else 256156358Ssam ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN; 257156358Ssam} 258156358Ssam 259141658Ssamstatic __inline void 260141658Ssamcopy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 261141658Ssam{ 262141658Ssam /* propagate useful state */ 263141658Ssam nbss->ni_authmode = obss->ni_authmode; 264141658Ssam nbss->ni_txpower = obss->ni_txpower; 265141658Ssam nbss->ni_vlan = obss->ni_vlan; 266141658Ssam nbss->ni_rsn = obss->ni_rsn; 267141658Ssam /* XXX statistics? */ 268141658Ssam} 269141658Ssam 270116742Ssamvoid 271116742Ssamieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 272116742Ssam{ 273140753Ssam struct ieee80211_node_table *nt; 274116742Ssam struct ieee80211_node *ni; 275116742Ssam 276138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 277138568Ssam "%s: creating ibss\n", __func__); 278138568Ssam 279138568Ssam /* 280138568Ssam * Create the station/neighbor table. Note that for adhoc 281138568Ssam * mode we make the initial inactivity timer longer since 282138568Ssam * we create nodes only through discovery and they typically 283138568Ssam * are long-lived associations. 284138568Ssam */ 285140753Ssam nt = &ic->ic_sta; 286140753Ssam IEEE80211_NODE_LOCK(nt); 287140753Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 288140753Ssam nt->nt_name = "station"; 289140753Ssam nt->nt_inact_init = ic->ic_inact_init; 290140753Ssam } else { 291140753Ssam nt->nt_name = "neighbor"; 292140753Ssam nt->nt_inact_init = ic->ic_inact_run; 293140753Ssam } 294140753Ssam IEEE80211_NODE_UNLOCK(nt); 295140753Ssam 296148863Ssam ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 297140753Ssam if (ni == NULL) { 298140753Ssam /* XXX recovery? */ 299138568Ssam return; 300138568Ssam } 301116742Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 302170530Ssam ni->ni_esslen = ic->ic_des_ssid[0].len; 303170530Ssam memcpy(ni->ni_essid, ic->ic_des_ssid[0].ssid, ni->ni_esslen); 304170530Ssam if (ic->ic_bss != NULL) 305170530Ssam copy_bss(ni, ic->ic_bss); 306148843Ssam ni->ni_intval = ic->ic_bintval; 307138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 308116742Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 309116742Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 310116742Ssam ni->ni_fhdwell = 200; /* XXX */ 311116742Ssam ni->ni_fhindex = 1; 312116742Ssam } 313138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 314138568Ssam ic->ic_flags |= IEEE80211_F_SIBSS; 315138568Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 316143300Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 317143300Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 318167282Ssam else { 319167282Ssam get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 320167282Ssam /* clear group bit, add local bit */ 321167282Ssam ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 322167282Ssam } 323153403Ssam } else if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 324153403Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 325153403Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 326153403Ssam else 327153403Ssam memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 328138568Ssam } 329138568Ssam /* 330138568Ssam * Fix the channel and related attributes. 331138568Ssam */ 332170530Ssam ic->ic_bsschan = chan; 333170530Ssam ieee80211_node_set_chan(ic, ni); 334170530Ssam ic->ic_curmode = ieee80211_chan2mode(chan); 335138568Ssam /* 336138568Ssam * Do mode-specific rate setup. 337138568Ssam */ 338170530Ssam if (IEEE80211_IS_CHAN_FULL(chan)) { 339170530Ssam if (IEEE80211_IS_CHAN_ANYG(chan)) { 340170530Ssam /* 341170530Ssam * Use a mixed 11b/11g rate set. 342170530Ssam */ 343170530Ssam ieee80211_set11gbasicrates(&ni->ni_rates, 344170530Ssam IEEE80211_MODE_11G); 345170530Ssam } else if (IEEE80211_IS_CHAN_B(chan)) { 346170530Ssam /* 347170530Ssam * Force pure 11b rate set. 348170530Ssam */ 349170530Ssam ieee80211_set11gbasicrates(&ni->ni_rates, 350170530Ssam IEEE80211_MODE_11B); 351170530Ssam } 352170530Ssam } 353138568Ssam 354170530Ssam (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 355116742Ssam} 356116742Ssam 357170530Ssam/* 358170530Ssam * Reset bss state on transition to the INIT state. 359170530Ssam * Clear any stations from the table (they have been 360170530Ssam * deauth'd) and reset the bss node (clears key, rate 361170530Ssam * etc. state). 362170530Ssam */ 363138568Ssamvoid 364138568Ssamieee80211_reset_bss(struct ieee80211com *ic) 365138568Ssam{ 366138568Ssam struct ieee80211_node *ni, *obss; 367138568Ssam 368170530Ssam callout_drain(&ic->ic_inact); 369140753Ssam ieee80211_node_table_reset(&ic->ic_sta); 370170530Ssam ieee80211_reset_erp(ic); 371140753Ssam 372170530Ssam ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 373138568Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 374138568Ssam obss = ic->ic_bss; 375138568Ssam ic->ic_bss = ieee80211_ref_node(ni); 376141658Ssam if (obss != NULL) { 377141658Ssam copy_bss(ni, obss); 378148843Ssam ni->ni_intval = ic->ic_bintval; 379138568Ssam ieee80211_free_node(obss); 380141658Ssam } 381138568Ssam} 382138568Ssam 383170530Ssamstatic int 384170530Ssammatch_ssid(const struct ieee80211_node *ni, 385170530Ssam int nssid, const struct ieee80211_scan_ssid ssids[]) 386170530Ssam{ 387170530Ssam int i; 388148432Ssam 389170530Ssam for (i = 0; i < nssid; i++) { 390170530Ssam if (ni->ni_esslen == ssids[i].len && 391170530Ssam memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 392170530Ssam return 1; 393170530Ssam } 394170530Ssam return 0; 395170530Ssam} 396170530Ssam 397170530Ssam/* 398170530Ssam * Test a node for suitability/compatibility. 399170530Ssam */ 400127767Ssamstatic int 401170530Ssamcheck_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 402127767Ssam{ 403170530Ssam uint8_t rate; 404170530Ssam 405170530Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 406170530Ssam return 0; 407170530Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 408170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 409170530Ssam return 0; 410170530Ssam } else { 411170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 412170530Ssam return 0; 413170530Ssam } 414170530Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 415170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 416170530Ssam return 0; 417170530Ssam } else { 418170530Ssam /* XXX does this mean privacy is supported or required? */ 419170530Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 420170530Ssam return 0; 421170530Ssam } 422170530Ssam rate = ieee80211_fix_rate(ni, &ni->ni_rates, 423170530Ssam IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 424170530Ssam if (rate & IEEE80211_RATE_BASIC) 425170530Ssam return 0; 426170530Ssam if (ic->ic_des_nssid != 0 && 427170530Ssam !match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid)) 428170530Ssam return 0; 429170530Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 430170530Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 431170530Ssam return 0; 432170530Ssam return 1; 433170530Ssam} 434170530Ssam 435170530Ssam#ifdef IEEE80211_DEBUG 436170530Ssam/* 437170530Ssam * Display node suitability/compatibility. 438170530Ssam */ 439170530Ssamstatic void 440170530Ssamcheck_bss_debug(struct ieee80211com *ic, struct ieee80211_node *ni) 441170530Ssam{ 442170530Ssam uint8_t rate; 443127767Ssam int fail; 444127767Ssam 445127767Ssam fail = 0; 446127767Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 447127767Ssam fail |= 0x01; 448127767Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 449127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 450127767Ssam fail |= 0x02; 451127767Ssam } else { 452127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 453127767Ssam fail |= 0x02; 454127767Ssam } 455138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 456127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 457127767Ssam fail |= 0x04; 458127767Ssam } else { 459127767Ssam /* XXX does this mean privacy is supported or required? */ 460127767Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 461127767Ssam fail |= 0x04; 462127767Ssam } 463167442Ssam rate = ieee80211_fix_rate(ni, &ni->ni_rates, 464165887Ssam IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 465127767Ssam if (rate & IEEE80211_RATE_BASIC) 466127767Ssam fail |= 0x08; 467170530Ssam if (ic->ic_des_nssid != 0 && 468170530Ssam !match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid)) 469127767Ssam fail |= 0x10; 470127767Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 471127767Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 472127767Ssam fail |= 0x20; 473127767Ssam 474170530Ssam printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 475170530Ssam printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 476170530Ssam printf(" %3d%c", 477170530Ssam ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 478170530Ssam printf(" %+4d", ni->ni_rssi); 479170530Ssam printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 480170530Ssam fail & 0x08 ? '!' : ' '); 481170530Ssam printf(" %4s%c", 482170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 483170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 484170530Ssam "????", 485170530Ssam fail & 0x02 ? '!' : ' '); 486170530Ssam printf(" %3s%c ", 487170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 488170530Ssam fail & 0x04 ? '!' : ' '); 489170530Ssam ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 490170530Ssam printf("%s\n", fail & 0x10 ? "!" : ""); 491138568Ssam} 492170530Ssam#endif /* IEEE80211_DEBUG */ 493138568Ssam 494138568Ssam/* 495138568Ssam * Handle 802.11 ad hoc network merge. The 496138568Ssam * convention, set by the Wireless Ethernet Compatibility Alliance 497138568Ssam * (WECA), is that an 802.11 station will change its BSSID to match 498138568Ssam * the "oldest" 802.11 ad hoc network, on the same channel, that 499138568Ssam * has the station's desired SSID. The "oldest" 802.11 network 500138568Ssam * sends beacons with the greatest TSF timestamp. 501138568Ssam * 502138568Ssam * The caller is assumed to validate TSF's before attempting a merge. 503138568Ssam * 504138568Ssam * Return !0 if the BSSID changed, 0 otherwise. 505138568Ssam */ 506138568Ssamint 507148306Ssamieee80211_ibss_merge(struct ieee80211_node *ni) 508138568Ssam{ 509148306Ssam struct ieee80211com *ic = ni->ni_ic; 510138568Ssam 511140453Ssam if (ni == ic->ic_bss || 512140453Ssam IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 513138568Ssam /* unchanged, nothing to do */ 514138568Ssam return 0; 515138568Ssam } 516170530Ssam if (!check_bss(ic, ni)) { 517170530Ssam /* capabilities mismatch */ 518138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 519138568Ssam "%s: merge failed, capabilities mismatch\n", __func__); 520170530Ssam#ifdef IEEE80211_DEBUG 521170530Ssam if (ieee80211_msg_assoc(ic)) 522170530Ssam check_bss_debug(ic, ni); 523170530Ssam#endif 524138568Ssam ic->ic_stats.is_ibss_capmismatch++; 525138568Ssam return 0; 526138568Ssam } 527138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 528138568Ssam "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 529138568Ssam ether_sprintf(ni->ni_bssid), 530138568Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 531138568Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 532138568Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 533138568Ssam ); 534170530Ssam return ieee80211_sta_join1(ieee80211_ref_node(ni)); 535138568Ssam} 536138568Ssam 537138568Ssam/* 538138568Ssam * Join the specified IBSS/BSS network. The node is assumed to 539138568Ssam * be passed in with a held reference. 540138568Ssam */ 541170530Ssamstatic int 542170530Ssamieee80211_sta_join1(struct ieee80211_node *selbs) 543138568Ssam{ 544170530Ssam struct ieee80211com *ic = selbs->ni_ic; 545138568Ssam struct ieee80211_node *obss; 546170530Ssam int canreassoc; 547138568Ssam 548116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 549140753Ssam struct ieee80211_node_table *nt; 550138568Ssam /* 551140753Ssam * Fillin the neighbor table; it will already 552139521Ssam * exist if we are simply switching mastership. 553140753Ssam * XXX ic_sta always setup so this is unnecessary? 554127772Ssam */ 555140753Ssam nt = &ic->ic_sta; 556140753Ssam IEEE80211_NODE_LOCK(nt); 557140753Ssam nt->nt_name = "neighbor"; 558140753Ssam nt->nt_inact_init = ic->ic_inact_run; 559140753Ssam IEEE80211_NODE_UNLOCK(nt); 560138568Ssam } 561138568Ssam 562138568Ssam /* 563138568Ssam * Committed to selbs, setup state. 564138568Ssam */ 565138568Ssam obss = ic->ic_bss; 566170530Ssam /* 567170530Ssam * Check if old+new node have the same address in which 568170530Ssam * case we can reassociate when operating in sta mode. 569170530Ssam */ 570170530Ssam canreassoc = (obss != NULL && 571170530Ssam ic->ic_state == IEEE80211_S_RUN && 572170530Ssam IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 573140753Ssam ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 574153352Ssam if (obss != NULL) { 575153352Ssam copy_bss(selbs, obss); 576138568Ssam ieee80211_free_node(obss); 577153352Ssam } 578165887Ssam 579138568Ssam /* 580165887Ssam * Delete unusable rates; we've already checked 581165887Ssam * that the negotiated rate set is acceptable. 582165887Ssam */ 583167442Ssam ieee80211_fix_rate(ic->ic_bss, &ic->ic_bss->ni_rates, 584167442Ssam IEEE80211_F_DODEL | IEEE80211_F_JOIN); 585165887Ssam 586170530Ssam ic->ic_bsschan = selbs->ni_chan; 587170530Ssam ic->ic_curchan = ic->ic_bsschan; 588170530Ssam ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 589170530Ssam ic->ic_set_channel(ic); 590165887Ssam /* 591138568Ssam * Set the erp state (mostly the slot time) to deal with 592138568Ssam * the auto-select case; this should be redundant if the 593138568Ssam * mode is locked. 594138568Ssam */ 595138568Ssam ieee80211_reset_erp(ic); 596138568Ssam ieee80211_wme_initparams(ic); 597140753Ssam 598170530Ssam if (ic->ic_opmode == IEEE80211_M_STA) { 599170530Ssam if (canreassoc) { 600170530Ssam /* Reassociate */ 601170530Ssam ieee80211_new_state(ic, IEEE80211_S_ASSOC, 1); 602170530Ssam } else { 603170530Ssam /* 604170530Ssam * Act as if we received a DEAUTH frame in case we 605170530Ssam * are invoked from the RUN state. This will cause 606170530Ssam * us to try to re-authenticate if we are operating 607170530Ssam * as a station. 608170530Ssam */ 609170530Ssam ieee80211_new_state(ic, IEEE80211_S_AUTH, 610170530Ssam IEEE80211_FC0_SUBTYPE_DEAUTH); 611170530Ssam } 612170530Ssam } else 613117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 614138568Ssam return 1; 615116742Ssam} 616116742Ssam 617170530Ssamint 618170530Ssamieee80211_sta_join(struct ieee80211com *ic, 619170530Ssam const struct ieee80211_scan_entry *se) 620170530Ssam{ 621170530Ssam struct ieee80211_node *ni; 622170530Ssam 623170530Ssam ni = ieee80211_alloc_node(&ic->ic_sta, se->se_macaddr); 624170530Ssam if (ni == NULL) { 625170530Ssam /* XXX msg */ 626170530Ssam return 0; 627170530Ssam } 628170530Ssam /* 629170530Ssam * Expand scan state into node's format. 630170530Ssam * XXX may not need all this stuff 631170530Ssam */ 632170530Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 633170530Ssam ni->ni_esslen = se->se_ssid[1]; 634170530Ssam memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 635170530Ssam ni->ni_rstamp = se->se_rstamp; 636170530Ssam ni->ni_tstamp.tsf = se->se_tstamp.tsf; 637170530Ssam ni->ni_intval = se->se_intval; 638170530Ssam ni->ni_capinfo = se->se_capinfo; 639170530Ssam /* XXX shift to 11n channel if htinfo present */ 640170530Ssam ni->ni_chan = se->se_chan; 641170530Ssam ni->ni_timoff = se->se_timoff; 642170530Ssam ni->ni_fhdwell = se->se_fhdwell; 643170530Ssam ni->ni_fhindex = se->se_fhindex; 644170530Ssam ni->ni_erp = se->se_erp; 645170530Ssam ni->ni_rssi = se->se_rssi; 646170530Ssam ni->ni_noise = se->se_noise; 647170530Ssam if (se->se_htcap_ie != NULL) 648170530Ssam ieee80211_ht_node_init(ni, se->se_htcap_ie); 649170530Ssam if (se->se_htinfo_ie != NULL) 650170530Ssam ieee80211_parse_htinfo(ni, se->se_htinfo_ie); 651170530Ssam if (se->se_wpa_ie != NULL) 652170530Ssam ieee80211_saveie(&ni->ni_wpa_ie, se->se_wpa_ie); 653170530Ssam if (se->se_rsn_ie != NULL) 654170530Ssam ieee80211_saveie(&ni->ni_rsn_ie, se->se_rsn_ie); 655170530Ssam if (se->se_wme_ie != NULL) 656170530Ssam ieee80211_saveie(&ni->ni_wme_ie, se->se_wme_ie); 657170530Ssam if (se->se_ath_ie != NULL) 658170530Ssam ieee80211_saveath(ni, se->se_ath_ie); 659170530Ssam 660170530Ssam ic->ic_dtim_period = se->se_dtimperiod; 661170530Ssam ic->ic_dtim_count = 0; 662170530Ssam 663170530Ssam /* NB: must be after ni_chan is setup */ 664170530Ssam ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 665170530Ssam IEEE80211_F_DOSORT); 666170530Ssam if (se->se_htcap_ie != NULL) 667170530Ssam ieee80211_setup_htrates(ni, se->se_htcap_ie, IEEE80211_F_JOIN); 668170530Ssam if (se->se_htinfo_ie != NULL) 669170530Ssam ieee80211_setup_basic_htrates(ni, se->se_htinfo_ie); 670170530Ssam 671170530Ssam return ieee80211_sta_join1(ieee80211_ref_node(ni)); 672170530Ssam} 673170530Ssam 674138568Ssam/* 675138568Ssam * Leave the specified IBSS/BSS network. The node is assumed to 676138568Ssam * be passed in with a held reference. 677138568Ssam */ 678138568Ssamvoid 679138568Ssamieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 680138568Ssam{ 681138568Ssam ic->ic_node_cleanup(ni); 682138568Ssam ieee80211_notify_node_leave(ic, ni); 683138568Ssam} 684138568Ssam 685116742Ssamstatic struct ieee80211_node * 686138568Ssamnode_alloc(struct ieee80211_node_table *nt) 687116742Ssam{ 688127768Ssam struct ieee80211_node *ni; 689138568Ssam 690127768Ssam MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 691127768Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 692127768Ssam return ni; 693116742Ssam} 694116742Ssam 695138568Ssam/* 696138568Ssam * Reclaim any resources in a node and reset any critical 697138568Ssam * state. Typically nodes are free'd immediately after, 698138568Ssam * but in some cases the storage may be reused so we need 699138568Ssam * to insure consistent state (should probably fix that). 700138568Ssam */ 701116742Ssamstatic void 702138568Ssamnode_cleanup(struct ieee80211_node *ni) 703116742Ssam{ 704138568Ssam#define N(a) (sizeof(a)/sizeof(a[0])) 705138568Ssam struct ieee80211com *ic = ni->ni_ic; 706170530Ssam int i; 707138568Ssam 708138568Ssam /* NB: preserve ni_table */ 709138568Ssam if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 710138568Ssam ic->ic_ps_sta--; 711138568Ssam ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 712138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 713138568Ssam "[%s] power save mode off, %u sta's in ps mode\n", 714138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 715138568Ssam } 716147788Ssam /* 717147788Ssam * Clear AREF flag that marks the authorization refcnt bump 718147788Ssam * has happened. This is probably not needed as the node 719147788Ssam * should always be removed from the table so not found but 720147788Ssam * do it just in case. 721147788Ssam */ 722147788Ssam ni->ni_flags &= ~IEEE80211_NODE_AREF; 723138568Ssam 724138568Ssam /* 725138568Ssam * Drain power save queue and, if needed, clear TIM. 726138568Ssam */ 727170530Ssam if (ieee80211_node_saveq_drain(ni) != 0 && ic->ic_set_tim != NULL) 728148304Ssam ic->ic_set_tim(ni, 0); 729138568Ssam 730138568Ssam ni->ni_associd = 0; 731138568Ssam if (ni->ni_challenge != NULL) { 732170530Ssam FREE(ni->ni_challenge, M_80211_NODE); 733138568Ssam ni->ni_challenge = NULL; 734138568Ssam } 735138568Ssam /* 736138568Ssam * Preserve SSID, WPA, and WME ie's so the bss node is 737138568Ssam * reusable during a re-auth/re-assoc state transition. 738138568Ssam * If we remove these data they will not be recreated 739138568Ssam * because they come from a probe-response or beacon frame 740138568Ssam * which cannot be expected prior to the association-response. 741138568Ssam * This should not be an issue when operating in other modes 742138568Ssam * as stations leaving always go through a full state transition 743138568Ssam * which will rebuild this state. 744138568Ssam * 745138568Ssam * XXX does this leave us open to inheriting old state? 746138568Ssam */ 747138568Ssam for (i = 0; i < N(ni->ni_rxfrag); i++) 748138568Ssam if (ni->ni_rxfrag[i] != NULL) { 749138568Ssam m_freem(ni->ni_rxfrag[i]); 750138568Ssam ni->ni_rxfrag[i] = NULL; 751138568Ssam } 752148863Ssam /* 753148863Ssam * Must be careful here to remove any key map entry w/o a LOR. 754148863Ssam */ 755148863Ssam ieee80211_node_delucastkey(ni); 756138568Ssam#undef N 757116742Ssam} 758116742Ssam 759116742Ssamstatic void 760138568Ssamnode_free(struct ieee80211_node *ni) 761116742Ssam{ 762138568Ssam struct ieee80211com *ic = ni->ni_ic; 763138568Ssam 764138568Ssam ic->ic_node_cleanup(ni); 765138568Ssam if (ni->ni_wpa_ie != NULL) 766170530Ssam FREE(ni->ni_wpa_ie, M_80211_NODE); 767170530Ssam if (ni->ni_rsn_ie != NULL) 768170530Ssam FREE(ni->ni_rsn_ie, M_80211_NODE); 769138568Ssam if (ni->ni_wme_ie != NULL) 770170530Ssam FREE(ni->ni_wme_ie, M_80211_NODE); 771170530Ssam if (ni->ni_ath_ie != NULL) 772170530Ssam FREE(ni->ni_ath_ie, M_80211_NODE); 773138568Ssam IEEE80211_NODE_SAVEQ_DESTROY(ni); 774138568Ssam FREE(ni, M_80211_NODE); 775116742Ssam} 776116742Ssam 777170530Ssamstatic int8_t 778138568Ssamnode_getrssi(const struct ieee80211_node *ni) 779120104Ssam{ 780120104Ssam return ni->ni_rssi; 781120104Ssam} 782120104Ssam 783116742Ssamstatic void 784170530Ssamnode_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 785170530Ssam{ 786170530Ssam *rssi = ni->ni_rssi; 787170530Ssam *noise = ni->ni_noise; 788170530Ssam} 789170530Ssam 790170530Ssamstatic void 791138568Ssamieee80211_setup_node(struct ieee80211_node_table *nt, 792170530Ssam struct ieee80211_node *ni, const uint8_t *macaddr) 793116742Ssam{ 794138568Ssam struct ieee80211com *ic = nt->nt_ic; 795116742Ssam int hash; 796116742Ssam 797138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 798140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 799138568Ssam ether_sprintf(macaddr), nt->nt_name); 800138568Ssam 801116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 802116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 803138568Ssam ieee80211_node_initref(ni); /* mark referenced */ 804138568Ssam ni->ni_chan = IEEE80211_CHAN_ANYC; 805138568Ssam ni->ni_authmode = IEEE80211_AUTH_OPEN; 806138568Ssam ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 807138568Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 808139528Ssam ni->ni_inact_reload = nt->nt_inact_init; 809139528Ssam ni->ni_inact = ni->ni_inact_reload; 810170530Ssam ni->ni_ath_defkeyix = 0x7fff; 811138568Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 812138568Ssam 813138568Ssam IEEE80211_NODE_LOCK(nt); 814138568Ssam TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 815138568Ssam LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 816138568Ssam ni->ni_table = nt; 817138568Ssam ni->ni_ic = ic; 818138568Ssam IEEE80211_NODE_UNLOCK(nt); 819116742Ssam} 820116742Ssam 821116742Ssamstruct ieee80211_node * 822170530Ssamieee80211_alloc_node(struct ieee80211_node_table *nt, const uint8_t *macaddr) 823116742Ssam{ 824138568Ssam struct ieee80211com *ic = nt->nt_ic; 825138568Ssam struct ieee80211_node *ni; 826138568Ssam 827138568Ssam ni = ic->ic_node_alloc(nt); 828116742Ssam if (ni != NULL) 829138568Ssam ieee80211_setup_node(nt, ni, macaddr); 830127769Ssam else 831127769Ssam ic->ic_stats.is_rx_nodealloc++; 832116742Ssam return ni; 833116742Ssam} 834116742Ssam 835148777Ssam/* 836148777Ssam * Craft a temporary node suitable for sending a management frame 837148777Ssam * to the specified station. We craft only as much state as we 838148777Ssam * need to do the work since the node will be immediately reclaimed 839148777Ssam * once the send completes. 840148777Ssam */ 841116742Ssamstruct ieee80211_node * 842170530Ssamieee80211_tmp_node(struct ieee80211com *ic, const uint8_t *macaddr) 843148777Ssam{ 844148777Ssam struct ieee80211_node *ni; 845148777Ssam 846148777Ssam ni = ic->ic_node_alloc(&ic->ic_sta); 847148777Ssam if (ni != NULL) { 848148777Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 849148777Ssam "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 850148777Ssam 851148777Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 852148777Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 853148777Ssam ieee80211_node_initref(ni); /* mark referenced */ 854148777Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 855148777Ssam /* NB: required by ieee80211_fix_rate */ 856170530Ssam ieee80211_node_set_chan(ic, ni); 857148777Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, 858148777Ssam IEEE80211_KEYIX_NONE); 859148777Ssam /* XXX optimize away */ 860148777Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 861148777Ssam 862148777Ssam ni->ni_table = NULL; /* NB: pedantic */ 863148777Ssam ni->ni_ic = ic; 864148777Ssam } else { 865148777Ssam /* XXX msg */ 866148777Ssam ic->ic_stats.is_rx_nodealloc++; 867148777Ssam } 868148777Ssam return ni; 869148777Ssam} 870148777Ssam 871148777Ssamstruct ieee80211_node * 872170530Ssamieee80211_dup_bss(struct ieee80211_node_table *nt, const uint8_t *macaddr) 873116742Ssam{ 874138568Ssam struct ieee80211com *ic = nt->nt_ic; 875138568Ssam struct ieee80211_node *ni; 876138568Ssam 877138568Ssam ni = ic->ic_node_alloc(nt); 878116742Ssam if (ni != NULL) { 879138568Ssam ieee80211_setup_node(nt, ni, macaddr); 880127770Ssam /* 881127770Ssam * Inherit from ic_bss. 882127770Ssam */ 883138568Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 884138568Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 885138568Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 886127770Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 887170530Ssam ieee80211_node_set_chan(ic, ni); 888138568Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 889127770Ssam } else 890127770Ssam ic->ic_stats.is_rx_nodealloc++; 891116742Ssam return ni; 892116742Ssam} 893116742Ssam 894127772Ssamstatic struct ieee80211_node * 895138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 896138568Ssam_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 897170530Ssam const uint8_t *macaddr, const char *func, int line) 898138568Ssam#else 899138568Ssam_ieee80211_find_node(struct ieee80211_node_table *nt, 900170530Ssam const uint8_t *macaddr) 901138568Ssam#endif 902116742Ssam{ 903116742Ssam struct ieee80211_node *ni; 904116742Ssam int hash; 905116742Ssam 906138568Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 907127772Ssam 908116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 909138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 910116742Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 911138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 912138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 913138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 914140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 915140766Ssam func, line, 916140766Ssam ni, ether_sprintf(ni->ni_macaddr), 917140766Ssam ieee80211_node_refcnt(ni)); 918138568Ssam#endif 919127772Ssam return ni; 920116742Ssam } 921116742Ssam } 922127772Ssam return NULL; 923127772Ssam} 924138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 925138568Ssam#define _ieee80211_find_node(nt, mac) \ 926138568Ssam _ieee80211_find_node_debug(nt, mac, func, line) 927138568Ssam#endif 928127772Ssam 929127772Ssamstruct ieee80211_node * 930138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 931138568Ssamieee80211_find_node_debug(struct ieee80211_node_table *nt, 932170530Ssam const uint8_t *macaddr, const char *func, int line) 933138568Ssam#else 934170530Ssamieee80211_find_node(struct ieee80211_node_table *nt, const uint8_t *macaddr) 935138568Ssam#endif 936127772Ssam{ 937127772Ssam struct ieee80211_node *ni; 938127772Ssam 939138568Ssam IEEE80211_NODE_LOCK(nt); 940138568Ssam ni = _ieee80211_find_node(nt, macaddr); 941138568Ssam IEEE80211_NODE_UNLOCK(nt); 942116742Ssam return ni; 943116742Ssam} 944116742Ssam 945116742Ssam/* 946138568Ssam * Fake up a node; this handles node discovery in adhoc mode. 947138568Ssam * Note that for the driver's benefit we we treat this like 948138568Ssam * an association so the driver has an opportunity to setup 949138568Ssam * it's private state. 950138568Ssam */ 951138568Ssamstruct ieee80211_node * 952138568Ssamieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 953170530Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 954138568Ssam{ 955138568Ssam struct ieee80211com *ic = nt->nt_ic; 956138568Ssam struct ieee80211_node *ni; 957138568Ssam 958153073Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 959153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 960138568Ssam ni = ieee80211_dup_bss(nt, macaddr); 961138568Ssam if (ni != NULL) { 962138568Ssam /* XXX no rate negotiation; just dup */ 963138568Ssam ni->ni_rates = ic->ic_bss->ni_rates; 964139524Ssam if (ic->ic_newassoc != NULL) 965148307Ssam ic->ic_newassoc(ni, 1); 966153404Ssam if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 967153404Ssam /* 968170530Ssam * In adhoc demo mode there are no management 969170530Ssam * frames to use to discover neighbor capabilities, 970170530Ssam * so blindly propagate the local configuration 971170530Ssam * so we can do interesting things (e.g. use 972170530Ssam * WME to disable ACK's). 973153404Ssam */ 974153404Ssam if (ic->ic_flags & IEEE80211_F_WME) 975153404Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 976170530Ssam if (ic->ic_flags & IEEE80211_F_FF) 977170530Ssam ni->ni_flags |= IEEE80211_NODE_FF; 978153404Ssam } 979170530Ssam /* XXX not right for 802.1x/WPA */ 980170530Ssam ieee80211_node_authorize(ni); 981138568Ssam } 982138568Ssam return ni; 983138568Ssam} 984138568Ssam 985148936Ssamvoid 986153073Ssamieee80211_init_neighbor(struct ieee80211_node *ni, 987153073Ssam const struct ieee80211_frame *wh, 988153073Ssam const struct ieee80211_scanparams *sp) 989153073Ssam{ 990153073Ssam ni->ni_esslen = sp->ssid[1]; 991153073Ssam memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 992153073Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 993153073Ssam memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 994153073Ssam ni->ni_intval = sp->bintval; 995153073Ssam ni->ni_capinfo = sp->capinfo; 996153073Ssam ni->ni_chan = ni->ni_ic->ic_curchan; 997153073Ssam ni->ni_fhdwell = sp->fhdwell; 998153073Ssam ni->ni_fhindex = sp->fhindex; 999153073Ssam ni->ni_erp = sp->erp; 1000153073Ssam ni->ni_timoff = sp->timoff; 1001153073Ssam if (sp->wme != NULL) 1002153073Ssam ieee80211_saveie(&ni->ni_wme_ie, sp->wme); 1003153073Ssam if (sp->wpa != NULL) 1004153073Ssam ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa); 1005170530Ssam if (sp->rsn != NULL) 1006170530Ssam ieee80211_saveie(&ni->ni_rsn_ie, sp->rsn); 1007170530Ssam if (sp->ath != NULL) 1008170530Ssam ieee80211_saveath(ni, sp->ath); 1009153073Ssam 1010153073Ssam /* NB: must be after ni_chan is setup */ 1011165887Ssam ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1012165887Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1013165887Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1014153073Ssam} 1015153073Ssam 1016148936Ssam/* 1017148936Ssam * Do node discovery in adhoc mode on receipt of a beacon 1018148936Ssam * or probe response frame. Note that for the driver's 1019148936Ssam * benefit we we treat this like an association so the 1020148936Ssam * driver has an opportunity to setup it's private state. 1021148936Ssam */ 1022148936Ssamstruct ieee80211_node * 1023148936Ssamieee80211_add_neighbor(struct ieee80211com *ic, 1024148936Ssam const struct ieee80211_frame *wh, 1025148936Ssam const struct ieee80211_scanparams *sp) 1026148936Ssam{ 1027148936Ssam struct ieee80211_node *ni; 1028148936Ssam 1029153073Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1030153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1031148936Ssam ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */ 1032148936Ssam if (ni != NULL) { 1033153073Ssam ieee80211_init_neighbor(ni, wh, sp); 1034148936Ssam if (ic->ic_newassoc != NULL) 1035148936Ssam ic->ic_newassoc(ni, 1); 1036148936Ssam /* XXX not right for 802.1x/WPA */ 1037148936Ssam ieee80211_node_authorize(ni); 1038148936Ssam } 1039148936Ssam return ni; 1040148936Ssam} 1041148936Ssam 1042148863Ssam#define IS_CTL(wh) \ 1043148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1044148863Ssam#define IS_PSPOLL(wh) \ 1045148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1046170530Ssam#define IS_BAR(wh) \ 1047170530Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1048170530Ssam 1049138568Ssam/* 1050138568Ssam * Locate the node for sender, track state, and then pass the 1051138568Ssam * (referenced) node up to the 802.11 layer for its use. We 1052138568Ssam * are required to pass some node so we fall back to ic_bss 1053138568Ssam * when this frame is from an unknown sender. The 802.11 layer 1054138568Ssam * knows this means the sender wasn't in the node table and 1055138568Ssam * acts accordingly. 1056138568Ssam */ 1057138568Ssamstruct ieee80211_node * 1058138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1059138568Ssamieee80211_find_rxnode_debug(struct ieee80211com *ic, 1060138568Ssam const struct ieee80211_frame_min *wh, const char *func, int line) 1061138568Ssam#else 1062138568Ssamieee80211_find_rxnode(struct ieee80211com *ic, 1063138568Ssam const struct ieee80211_frame_min *wh) 1064138568Ssam#endif 1065138568Ssam{ 1066138568Ssam struct ieee80211_node_table *nt; 1067138568Ssam struct ieee80211_node *ni; 1068138568Ssam 1069138568Ssam /* XXX check ic_bss first in station mode */ 1070138568Ssam /* XXX 4-address frames? */ 1071170530Ssam nt = &ic->ic_sta; 1072138568Ssam IEEE80211_NODE_LOCK(nt); 1073170530Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1074138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1075138568Ssam else 1076138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1077148863Ssam if (ni == NULL) 1078148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1079138568Ssam IEEE80211_NODE_UNLOCK(nt); 1080138568Ssam 1081148863Ssam return ni; 1082148863Ssam} 1083148863Ssam 1084148863Ssam/* 1085148863Ssam * Like ieee80211_find_rxnode but use the supplied h/w 1086148863Ssam * key index as a hint to locate the node in the key 1087148863Ssam * mapping table. If an entry is present at the key 1088148863Ssam * index we return it; otherwise do a normal lookup and 1089148863Ssam * update the mapping table if the station has a unicast 1090148863Ssam * key assigned to it. 1091148863Ssam */ 1092148863Ssamstruct ieee80211_node * 1093148863Ssam#ifdef IEEE80211_DEBUG_REFCNT 1094148863Ssamieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1095148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1096148863Ssam const char *func, int line) 1097148863Ssam#else 1098148863Ssamieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1099148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1100148863Ssam#endif 1101148863Ssam{ 1102148863Ssam struct ieee80211_node_table *nt; 1103148863Ssam struct ieee80211_node *ni; 1104148863Ssam 1105170530Ssam nt = &ic->ic_sta; 1106148863Ssam IEEE80211_NODE_LOCK(nt); 1107148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1108148863Ssam ni = nt->nt_keyixmap[keyix]; 1109148863Ssam else 1110148863Ssam ni = NULL; 1111148863Ssam if (ni == NULL) { 1112170530Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1113148863Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1114148863Ssam else 1115148863Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1116148863Ssam if (ni == NULL) 1117148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1118148863Ssam if (nt->nt_keyixmap != NULL) { 1119148863Ssam /* 1120148863Ssam * If the station has a unicast key cache slot 1121148863Ssam * assigned update the key->node mapping table. 1122148863Ssam */ 1123148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1124148863Ssam /* XXX can keyixmap[keyix] != NULL? */ 1125148863Ssam if (keyix < nt->nt_keyixmax && 1126148863Ssam nt->nt_keyixmap[keyix] == NULL) { 1127148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1128148863Ssam "%s: add key map entry %p<%s> refcnt %d\n", 1129148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1130148863Ssam ieee80211_node_refcnt(ni)+1); 1131148863Ssam nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1132148863Ssam } 1133148863Ssam } 1134170530Ssam } else 1135148863Ssam ieee80211_ref_node(ni); 1136148863Ssam IEEE80211_NODE_UNLOCK(nt); 1137148863Ssam 1138148863Ssam return ni; 1139148863Ssam} 1140170530Ssam#undef IS_BAR 1141138568Ssam#undef IS_PSPOLL 1142138568Ssam#undef IS_CTL 1143138568Ssam 1144138568Ssam/* 1145127772Ssam * Return a reference to the appropriate node for sending 1146127772Ssam * a data frame. This handles node discovery in adhoc networks. 1147127772Ssam */ 1148127772Ssamstruct ieee80211_node * 1149138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1150170530Ssamieee80211_find_txnode_debug(struct ieee80211com *ic, const uint8_t *macaddr, 1151138568Ssam const char *func, int line) 1152138568Ssam#else 1153170530Ssamieee80211_find_txnode(struct ieee80211com *ic, const uint8_t *macaddr) 1154138568Ssam#endif 1155127772Ssam{ 1156140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1157127772Ssam struct ieee80211_node *ni; 1158127772Ssam 1159127772Ssam /* 1160127772Ssam * The destination address should be in the node table 1161148863Ssam * unless this is a multicast/broadcast frame. We can 1162148863Ssam * also optimize station mode operation, all frames go 1163148863Ssam * to the bss node. 1164127772Ssam */ 1165127772Ssam /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1166138568Ssam IEEE80211_NODE_LOCK(nt); 1167148863Ssam if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1168148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1169158121Ssam else { 1170148863Ssam ni = _ieee80211_find_node(nt, macaddr); 1171158121Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1172158121Ssam (ni != NULL && ni->ni_associd == 0)) { 1173158121Ssam /* 1174158121Ssam * Station is not associated; don't permit the 1175158121Ssam * data frame to be sent by returning NULL. This 1176158121Ssam * is kinda a kludge but the least intrusive way 1177158121Ssam * to add this check into all drivers. 1178158121Ssam */ 1179158121Ssam ieee80211_unref_node(&ni); /* NB: null's ni */ 1180158121Ssam } 1181158121Ssam } 1182138568Ssam IEEE80211_NODE_UNLOCK(nt); 1183138568Ssam 1184138568Ssam if (ni == NULL) { 1185138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS || 1186140497Ssam ic->ic_opmode == IEEE80211_M_AHDEMO) { 1187140497Ssam /* 1188140497Ssam * In adhoc mode cons up a node for the destination. 1189140497Ssam * Note that we need an additional reference for the 1190140497Ssam * caller to be consistent with _ieee80211_find_node. 1191140497Ssam */ 1192138568Ssam ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1193140497Ssam if (ni != NULL) 1194140497Ssam (void) ieee80211_ref_node(ni); 1195140497Ssam } else { 1196138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1197138568Ssam "[%s] no node, discard frame (%s)\n", 1198138568Ssam ether_sprintf(macaddr), __func__); 1199138568Ssam ic->ic_stats.is_tx_nonode++; 1200127772Ssam } 1201127772Ssam } 1202127772Ssam return ni; 1203127772Ssam} 1204127772Ssam 1205127772Ssam/* 1206138568Ssam * Like find but search based on the ssid too. 1207138568Ssam */ 1208138568Ssamstruct ieee80211_node * 1209138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1210138568Ssamieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1211170530Ssam const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid, 1212138568Ssam const char *func, int line) 1213138568Ssam#else 1214138568Ssamieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1215170530Ssam const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid) 1216138568Ssam#endif 1217138568Ssam{ 1218147118Ssam#define MATCH_SSID(ni, ssid, ssidlen) \ 1219147118Ssam (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0) 1220170530Ssam static const uint8_t zeromac[IEEE80211_ADDR_LEN]; 1221138568Ssam struct ieee80211_node *ni; 1222138568Ssam int hash; 1223138568Ssam 1224138568Ssam IEEE80211_NODE_LOCK(nt); 1225147118Ssam /* 1226147118Ssam * A mac address that is all zero means match only the ssid; 1227147118Ssam * otherwise we must match both. 1228147118Ssam */ 1229147118Ssam if (IEEE80211_ADDR_EQ(macaddr, zeromac)) { 1230147118Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1231147118Ssam if (MATCH_SSID(ni, ssid, ssidlen)) 1232147118Ssam break; 1233147118Ssam } 1234147118Ssam } else { 1235147118Ssam hash = IEEE80211_NODE_HASH(macaddr); 1236147118Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1237147118Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1238147118Ssam MATCH_SSID(ni, ssid, ssidlen)) 1239147118Ssam break; 1240147118Ssam } 1241147118Ssam } 1242147118Ssam if (ni != NULL) { 1243147118Ssam ieee80211_ref_node(ni); /* mark referenced */ 1244170530Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1245159139Sdds REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr), 1246147118Ssam ieee80211_node_refcnt(ni)); 1247138568Ssam } 1248138568Ssam IEEE80211_NODE_UNLOCK(nt); 1249138568Ssam return ni; 1250147118Ssam#undef MATCH_SSID 1251138568Ssam} 1252138568Ssam 1253116742Ssamstatic void 1254138568Ssam_ieee80211_free_node(struct ieee80211_node *ni) 1255116742Ssam{ 1256138568Ssam struct ieee80211com *ic = ni->ni_ic; 1257138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1258119150Ssam 1259138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1260140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 1261140766Ssam ether_sprintf(ni->ni_macaddr), 1262138568Ssam nt != NULL ? nt->nt_name : "<gone>"); 1263138568Ssam 1264138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1265138568Ssam if (nt != NULL) { 1266138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1267138568Ssam LIST_REMOVE(ni, ni_hash); 1268138568Ssam } 1269138568Ssam ic->ic_node_free(ni); 1270116742Ssam} 1271116742Ssam 1272116742Ssamvoid 1273138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1274138568Ssamieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1275138568Ssam#else 1276138568Ssamieee80211_free_node(struct ieee80211_node *ni) 1277138568Ssam#endif 1278116742Ssam{ 1279138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1280119150Ssam 1281138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1282140454Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1283140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1284138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1285138568Ssam#endif 1286148863Ssam if (nt != NULL) { 1287148863Ssam IEEE80211_NODE_LOCK(nt); 1288148863Ssam if (ieee80211_node_dectestref(ni)) { 1289148863Ssam /* 1290148863Ssam * Last reference, reclaim state. 1291148863Ssam */ 1292138568Ssam _ieee80211_free_node(ni); 1293148863Ssam } else if (ieee80211_node_refcnt(ni) == 1 && 1294148863Ssam nt->nt_keyixmap != NULL) { 1295148863Ssam ieee80211_keyix keyix; 1296148863Ssam /* 1297148863Ssam * Check for a last reference in the key mapping table. 1298148863Ssam */ 1299148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1300148863Ssam if (keyix < nt->nt_keyixmax && 1301148863Ssam nt->nt_keyixmap[keyix] == ni) { 1302148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1303148863Ssam "%s: %p<%s> clear key map entry", __func__, 1304148863Ssam ni, ether_sprintf(ni->ni_macaddr)); 1305148863Ssam nt->nt_keyixmap[keyix] = NULL; 1306148863Ssam ieee80211_node_decref(ni); /* XXX needed? */ 1307148863Ssam _ieee80211_free_node(ni); 1308148863Ssam } 1309148863Ssam } 1310148863Ssam IEEE80211_NODE_UNLOCK(nt); 1311148863Ssam } else { 1312148863Ssam if (ieee80211_node_dectestref(ni)) 1313138568Ssam _ieee80211_free_node(ni); 1314116742Ssam } 1315116742Ssam} 1316116742Ssam 1317138568Ssam/* 1318148863Ssam * Reclaim a unicast key and clear any key cache state. 1319148863Ssam */ 1320148863Ssamint 1321148863Ssamieee80211_node_delucastkey(struct ieee80211_node *ni) 1322148863Ssam{ 1323148863Ssam struct ieee80211com *ic = ni->ni_ic; 1324148863Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1325148863Ssam struct ieee80211_node *nikey; 1326148863Ssam ieee80211_keyix keyix; 1327148863Ssam int isowned, status; 1328148863Ssam 1329148863Ssam /* 1330148863Ssam * NB: We must beware of LOR here; deleting the key 1331148863Ssam * can cause the crypto layer to block traffic updates 1332148863Ssam * which can generate a LOR against the node table lock; 1333148863Ssam * grab it here and stash the key index for our use below. 1334148863Ssam * 1335148863Ssam * Must also beware of recursion on the node table lock. 1336148863Ssam * When called from node_cleanup we may already have 1337148863Ssam * the node table lock held. Unfortunately there's no 1338148863Ssam * way to separate out this path so we must do this 1339148863Ssam * conditionally. 1340148863Ssam */ 1341148863Ssam isowned = IEEE80211_NODE_IS_LOCKED(nt); 1342148863Ssam if (!isowned) 1343148863Ssam IEEE80211_NODE_LOCK(nt); 1344148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1345148863Ssam status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 1346148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1347148863Ssam nikey = nt->nt_keyixmap[keyix]; 1348148863Ssam nt->nt_keyixmap[keyix] = NULL;; 1349148863Ssam } else 1350148863Ssam nikey = NULL; 1351148863Ssam if (!isowned) 1352148863Ssam IEEE80211_NODE_UNLOCK(&ic->ic_sta); 1353148863Ssam 1354148863Ssam if (nikey != NULL) { 1355148863Ssam KASSERT(nikey == ni, 1356148863Ssam ("key map out of sync, ni %p nikey %p", ni, nikey)); 1357148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1358148863Ssam "%s: delete key map entry %p<%s> refcnt %d\n", 1359148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1360148863Ssam ieee80211_node_refcnt(ni)-1); 1361148863Ssam ieee80211_free_node(ni); 1362148863Ssam } 1363148863Ssam return status; 1364148863Ssam} 1365148863Ssam 1366148863Ssam/* 1367138568Ssam * Reclaim a node. If this is the last reference count then 1368138568Ssam * do the normal free work. Otherwise remove it from the node 1369138568Ssam * table and mark it gone by clearing the back-reference. 1370138568Ssam */ 1371138568Ssamstatic void 1372138568Ssamnode_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1373116742Ssam{ 1374148863Ssam ieee80211_keyix keyix; 1375138568Ssam 1376148863Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 1377148863Ssam 1378140766Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1379140766Ssam "%s: remove %p<%s> from %s table, refcnt %d\n", 1380140766Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1381140766Ssam nt->nt_name, ieee80211_node_refcnt(ni)-1); 1382148863Ssam /* 1383148863Ssam * Clear any entry in the unicast key mapping table. 1384148863Ssam * We need to do it here so rx lookups don't find it 1385148863Ssam * in the mapping table even if it's not in the hash 1386148863Ssam * table. We cannot depend on the mapping table entry 1387148863Ssam * being cleared because the node may not be free'd. 1388148863Ssam */ 1389148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1390148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1391148863Ssam nt->nt_keyixmap[keyix] == ni) { 1392148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1393148863Ssam "%s: %p<%s> clear key map entry\n", 1394148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr)); 1395148863Ssam nt->nt_keyixmap[keyix] = NULL; 1396148863Ssam ieee80211_node_decref(ni); /* NB: don't need free */ 1397148863Ssam } 1398138568Ssam if (!ieee80211_node_dectestref(ni)) { 1399138568Ssam /* 1400138568Ssam * Other references are present, just remove the 1401138568Ssam * node from the table so it cannot be found. When 1402138568Ssam * the references are dropped storage will be 1403140753Ssam * reclaimed. 1404138568Ssam */ 1405138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1406138568Ssam LIST_REMOVE(ni, ni_hash); 1407138568Ssam ni->ni_table = NULL; /* clear reference */ 1408138568Ssam } else 1409138568Ssam _ieee80211_free_node(ni); 1410138568Ssam} 1411138568Ssam 1412138568Ssamstatic void 1413138568Ssamieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1414138568Ssam{ 1415138568Ssam struct ieee80211com *ic = nt->nt_ic; 1416116742Ssam struct ieee80211_node *ni; 1417116742Ssam 1418138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1419138568Ssam "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1420138568Ssam 1421138568Ssam while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1422138568Ssam if (ni->ni_associd != 0) { 1423138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1424138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1425138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1426138568Ssam } 1427138568Ssam node_reclaim(nt, ni); 1428138568Ssam } 1429116742Ssam} 1430116742Ssam 1431120483Ssam/* 1432138568Ssam * Timeout inactive stations and do related housekeeping. 1433138568Ssam * Note that we cannot hold the node lock while sending a 1434138568Ssam * frame as this would lead to a LOR. Instead we use a 1435138568Ssam * generation number to mark nodes that we've scanned and 1436138568Ssam * drop the lock and restart a scan if we have to time out 1437138568Ssam * a node. Since we are single-threaded by virtue of 1438120483Ssam * controlling the inactivity timer we can be sure this will 1439120483Ssam * process each node only once. 1440120483Ssam */ 1441138568Ssamstatic void 1442138568Ssamieee80211_timeout_stations(struct ieee80211_node_table *nt) 1443116742Ssam{ 1444138568Ssam struct ieee80211com *ic = nt->nt_ic; 1445120483Ssam struct ieee80211_node *ni; 1446138568Ssam u_int gen; 1447148320Ssam int isadhoc; 1448116742Ssam 1449148320Ssam isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS || 1450148320Ssam ic->ic_opmode == IEEE80211_M_AHDEMO); 1451138568Ssam IEEE80211_SCAN_LOCK(nt); 1452154532Ssam gen = ++nt->nt_scangen; 1453120483Ssamrestart: 1454138568Ssam IEEE80211_NODE_LOCK(nt); 1455138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1456120483Ssam if (ni->ni_scangen == gen) /* previously handled */ 1457120483Ssam continue; 1458120483Ssam ni->ni_scangen = gen; 1459138568Ssam /* 1460147788Ssam * Ignore entries for which have yet to receive an 1461147788Ssam * authentication frame. These are transient and 1462147788Ssam * will be reclaimed when the last reference to them 1463147788Ssam * goes away (when frame xmits complete). 1464147788Ssam */ 1465170530Ssam if ((ic->ic_opmode == IEEE80211_M_HOSTAP || 1466170530Ssam ic->ic_opmode == IEEE80211_M_STA) && 1467148323Ssam (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1468147788Ssam continue; 1469147788Ssam /* 1470138568Ssam * Free fragment if not needed anymore 1471138568Ssam * (last fragment older than 1s). 1472138568Ssam * XXX doesn't belong here 1473138568Ssam */ 1474138568Ssam if (ni->ni_rxfrag[0] != NULL && 1475138568Ssam ticks > ni->ni_rxfragstamp + hz) { 1476138568Ssam m_freem(ni->ni_rxfrag[0]); 1477138568Ssam ni->ni_rxfrag[0] = NULL; 1478138568Ssam } 1479172062Ssam if (ni->ni_inact > 0) 1480172062Ssam ni->ni_inact--; 1481140498Ssam /* 1482140498Ssam * Special case ourself; we may be idle for extended periods 1483140498Ssam * of time and regardless reclaiming our state is wrong. 1484140498Ssam */ 1485140498Ssam if (ni == ic->ic_bss) 1486140498Ssam continue; 1487148320Ssam if (ni->ni_associd != 0 || isadhoc) { 1488119150Ssam /* 1489170530Ssam * Age frames on the power save queue. 1490138568Ssam */ 1491170530Ssam if (ieee80211_node_saveq_age(ni) != 0 && 1492170530Ssam IEEE80211_NODE_SAVEQ_QLEN(ni) == 0 && 1493170530Ssam ic->ic_set_tim != NULL) 1494170530Ssam ic->ic_set_tim(ni, 0); 1495138568Ssam /* 1496138568Ssam * Probe the station before time it out. We 1497138568Ssam * send a null data frame which may not be 1498138568Ssam * universally supported by drivers (need it 1499138568Ssam * for ps-poll support so it should be...). 1500170530Ssam * 1501170530Ssam * XXX don't probe the station unless we've 1502170530Ssam * received a frame from them (and have 1503170530Ssam * some idea of the rates they are capable 1504170530Ssam * of); this will get fixed more properly 1505170530Ssam * soon with better handling of the rate set. 1506138568Ssam */ 1507172062Ssam if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) && 1508172062Ssam (0 < ni->ni_inact && 1509172062Ssam ni->ni_inact <= ic->ic_inact_probe) && 1510170530Ssam ni->ni_rates.rs_nrates != 0) { 1511148320Ssam IEEE80211_NOTE(ic, 1512148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1513148320Ssam ni, "%s", 1514148320Ssam "probe station due to inactivity"); 1515148582Ssam /* 1516148582Ssam * Grab a reference before unlocking the table 1517148582Ssam * so the node cannot be reclaimed before we 1518148582Ssam * send the frame. ieee80211_send_nulldata 1519148582Ssam * understands we've done this and reclaims the 1520148582Ssam * ref for us as needed. 1521148582Ssam */ 1522148582Ssam ieee80211_ref_node(ni); 1523138568Ssam IEEE80211_NODE_UNLOCK(nt); 1524148301Ssam ieee80211_send_nulldata(ni); 1525138568Ssam /* XXX stat? */ 1526138568Ssam goto restart; 1527138568Ssam } 1528138568Ssam } 1529172062Ssam if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) && 1530172062Ssam ni->ni_inact <= 0) { 1531148320Ssam IEEE80211_NOTE(ic, 1532148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1533148320Ssam "station timed out due to inactivity " 1534148320Ssam "(refcnt %u)", ieee80211_node_refcnt(ni)); 1535138568Ssam /* 1536138568Ssam * Send a deauthenticate frame and drop the station. 1537138568Ssam * This is somewhat complicated due to reference counts 1538138568Ssam * and locking. At this point a station will typically 1539138568Ssam * have a reference count of 1. ieee80211_node_leave 1540138568Ssam * will do a "free" of the node which will drop the 1541138568Ssam * reference count. But in the meantime a reference 1542138568Ssam * wil be held by the deauth frame. The actual reclaim 1543138568Ssam * of the node will happen either after the tx is 1544138568Ssam * completed or by ieee80211_node_leave. 1545120483Ssam * 1546138568Ssam * Separately we must drop the node lock before sending 1547170530Ssam * in case the driver takes a lock, as this can result 1548170530Ssam * in a LOR between the node lock and the driver lock. 1549119150Ssam */ 1550138568Ssam IEEE80211_NODE_UNLOCK(nt); 1551138568Ssam if (ni->ni_associd != 0) { 1552138568Ssam IEEE80211_SEND_MGMT(ic, ni, 1553138568Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1554138568Ssam IEEE80211_REASON_AUTH_EXPIRE); 1555138568Ssam } 1556138568Ssam ieee80211_node_leave(ic, ni); 1557121180Ssam ic->ic_stats.is_node_timeout++; 1558120483Ssam goto restart; 1559120483Ssam } 1560116742Ssam } 1561138568Ssam IEEE80211_NODE_UNLOCK(nt); 1562138568Ssam 1563138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1564170530Ssam} 1565138568Ssam 1566170530Ssamvoid 1567170530Ssamieee80211_node_timeout(void *arg) 1568170530Ssam{ 1569170530Ssam struct ieee80211com *ic = arg; 1570170530Ssam 1571170530Ssam ieee80211_scan_timeout(ic); 1572170530Ssam ieee80211_timeout_stations(&ic->ic_sta); 1573170530Ssam 1574170530Ssam callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 1575170530Ssam ieee80211_node_timeout, ic); 1576116742Ssam} 1577116742Ssam 1578116742Ssamvoid 1579138568Ssamieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1580116742Ssam{ 1581116742Ssam struct ieee80211_node *ni; 1582138568Ssam u_int gen; 1583116742Ssam 1584138568Ssam IEEE80211_SCAN_LOCK(nt); 1585154532Ssam gen = ++nt->nt_scangen; 1586138568Ssamrestart: 1587138568Ssam IEEE80211_NODE_LOCK(nt); 1588138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1589138568Ssam if (ni->ni_scangen != gen) { 1590138568Ssam ni->ni_scangen = gen; 1591138568Ssam (void) ieee80211_ref_node(ni); 1592138568Ssam IEEE80211_NODE_UNLOCK(nt); 1593138568Ssam (*f)(arg, ni); 1594138568Ssam ieee80211_free_node(ni); 1595138568Ssam goto restart; 1596138568Ssam } 1597138568Ssam } 1598138568Ssam IEEE80211_NODE_UNLOCK(nt); 1599138568Ssam 1600138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1601116742Ssam} 1602138568Ssam 1603138568Ssamvoid 1604138568Ssamieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1605138568Ssam{ 1606138568Ssam printf("0x%p: mac %s refcnt %d\n", ni, 1607138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1608138568Ssam printf("\tscangen %u authmode %u flags 0x%x\n", 1609138568Ssam ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1610138568Ssam printf("\tassocid 0x%x txpower %u vlan %u\n", 1611138568Ssam ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1612138568Ssam printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1613167439Ssam ni->ni_txseqs[IEEE80211_NONQOS_TID], 1614167439Ssam ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 1615167439Ssam ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 1616138568Ssam ni->ni_rxfragstamp); 1617170530Ssam printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 1618170530Ssam ni->ni_rstamp, ni->ni_rssi, ni->ni_noise, 1619170530Ssam ni->ni_intval, ni->ni_capinfo); 1620138568Ssam printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1621138568Ssam ether_sprintf(ni->ni_bssid), 1622138568Ssam ni->ni_esslen, ni->ni_essid, 1623138568Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 1624138568Ssam printf("\tfails %u inact %u txrate %u\n", 1625138568Ssam ni->ni_fails, ni->ni_inact, ni->ni_txrate); 1626170530Ssam printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 1627170530Ssam ni->ni_htcap, ni->ni_htparam, 1628170530Ssam ni->ni_htctlchan, ni->ni_ht2ndchan); 1629170530Ssam printf("\thtopmode %x htstbc %x chw %u\n", 1630170530Ssam ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 1631138568Ssam} 1632138568Ssam 1633138568Ssamvoid 1634138568Ssamieee80211_dump_nodes(struct ieee80211_node_table *nt) 1635138568Ssam{ 1636138568Ssam ieee80211_iterate_nodes(nt, 1637138568Ssam (ieee80211_iter_func *) ieee80211_dump_node, nt); 1638138568Ssam} 1639138568Ssam 1640138568Ssam/* 1641138568Ssam * Handle a station joining an 11g network. 1642138568Ssam */ 1643138568Ssamstatic void 1644138568Ssamieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1645138568Ssam{ 1646138568Ssam 1647138568Ssam /* 1648138568Ssam * Station isn't capable of short slot time. Bump 1649138568Ssam * the count of long slot time stations and disable 1650138568Ssam * use of short slot time. Note that the actual switch 1651138568Ssam * over to long slot time use may not occur until the 1652138568Ssam * next beacon transmission (per sec. 7.3.1.4 of 11g). 1653138568Ssam */ 1654138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1655138568Ssam ic->ic_longslotsta++; 1656138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1657138568Ssam "[%s] station needs long slot time, count %d\n", 1658138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1659138568Ssam /* XXX vap's w/ conflicting needs won't work */ 1660170530Ssam if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 1661170530Ssam /* 1662170530Ssam * Don't force slot time when switched to turbo 1663170530Ssam * mode as non-ERP stations won't be present; this 1664170530Ssam * need only be done when on the normal G channel. 1665170530Ssam */ 1666170530Ssam ieee80211_set_shortslottime(ic, 0); 1667170530Ssam } 1668138568Ssam } 1669138568Ssam /* 1670138568Ssam * If the new station is not an ERP station 1671138568Ssam * then bump the counter and enable protection 1672138568Ssam * if configured. 1673138568Ssam */ 1674138568Ssam if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 1675138568Ssam ic->ic_nonerpsta++; 1676138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1677138568Ssam "[%s] station is !ERP, %d non-ERP stations associated\n", 1678138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1679138568Ssam /* 1680138568Ssam * If protection is configured, enable it. 1681138568Ssam */ 1682138568Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE) { 1683138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1684138568Ssam "%s: enable use of protection\n", __func__); 1685138568Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1686138568Ssam } 1687138568Ssam /* 1688138568Ssam * If station does not support short preamble 1689138568Ssam * then we must enable use of Barker preamble. 1690138568Ssam */ 1691138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 1692138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1693138568Ssam "[%s] station needs long preamble\n", 1694138568Ssam ether_sprintf(ni->ni_macaddr)); 1695138568Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1696138568Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1697138568Ssam } 1698153973Ssam if (ic->ic_nonerpsta == 1) 1699153973Ssam ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE; 1700138568Ssam } else 1701138568Ssam ni->ni_flags |= IEEE80211_NODE_ERP; 1702138568Ssam} 1703138568Ssam 1704138568Ssamvoid 1705138568Ssamieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 1706138568Ssam{ 1707138568Ssam int newassoc; 1708138568Ssam 1709138568Ssam if (ni->ni_associd == 0) { 1710170530Ssam uint16_t aid; 1711138568Ssam 1712138568Ssam /* 1713138568Ssam * It would be good to search the bitmap 1714138568Ssam * more efficiently, but this will do for now. 1715138568Ssam */ 1716138568Ssam for (aid = 1; aid < ic->ic_max_aid; aid++) { 1717138568Ssam if (!IEEE80211_AID_ISSET(aid, 1718138568Ssam ic->ic_aid_bitmap)) 1719138568Ssam break; 1720138568Ssam } 1721138568Ssam if (aid >= ic->ic_max_aid) { 1722138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, 1723138568Ssam IEEE80211_REASON_ASSOC_TOOMANY); 1724138568Ssam ieee80211_node_leave(ic, ni); 1725138568Ssam return; 1726138568Ssam } 1727138568Ssam ni->ni_associd = aid | 0xc000; 1728138568Ssam IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 1729138568Ssam ic->ic_sta_assoc++; 1730138568Ssam newassoc = 1; 1731170530Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1732170530Ssam IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 1733138568Ssam ieee80211_node_join_11g(ic, ni); 1734138568Ssam } else 1735138568Ssam newassoc = 0; 1736138568Ssam 1737138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1738170530Ssam "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s%s%s%s\n", 1739139523Ssam ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re", 1740139523Ssam IEEE80211_NODE_AID(ni), 1741139523Ssam ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 1742139523Ssam ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 1743139523Ssam ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 1744170530Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1745170530Ssam ni->ni_flags & IEEE80211_NODE_HT ? 1746170530Ssam (ni->ni_chw == 20 ? ", HT20" : ", HT40") : "", 1747170530Ssam IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_FF) ? 1748170530Ssam ", fast-frames" : "", 1749170530Ssam IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_TURBOP) ? 1750170530Ssam ", turbo" : "" 1751139523Ssam ); 1752138568Ssam 1753138568Ssam /* give driver a chance to setup state like ni_txrate */ 1754139524Ssam if (ic->ic_newassoc != NULL) 1755148307Ssam ic->ic_newassoc(ni, newassoc); 1756138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 1757138568Ssam /* tell the authenticator about new station */ 1758138568Ssam if (ic->ic_auth->ia_node_join != NULL) 1759138568Ssam ic->ic_auth->ia_node_join(ic, ni); 1760138568Ssam ieee80211_notify_node_join(ic, ni, newassoc); 1761138568Ssam} 1762138568Ssam 1763138568Ssam/* 1764138568Ssam * Handle a station leaving an 11g network. 1765138568Ssam */ 1766138568Ssamstatic void 1767138568Ssamieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1768138568Ssam{ 1769138568Ssam 1770170530Ssam KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 1771170530Ssam ("not in 11g, bss %u:0x%x, curmode %u", ic->ic_bsschan->ic_freq, 1772170530Ssam ic->ic_bsschan->ic_flags, ic->ic_curmode)); 1773138568Ssam 1774138568Ssam /* 1775138568Ssam * If a long slot station do the slot time bookkeeping. 1776138568Ssam */ 1777138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1778138568Ssam KASSERT(ic->ic_longslotsta > 0, 1779138568Ssam ("bogus long slot station count %d", ic->ic_longslotsta)); 1780138568Ssam ic->ic_longslotsta--; 1781138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1782138568Ssam "[%s] long slot time station leaves, count now %d\n", 1783138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1784138568Ssam if (ic->ic_longslotsta == 0) { 1785138568Ssam /* 1786138568Ssam * Re-enable use of short slot time if supported 1787138568Ssam * and not operating in IBSS mode (per spec). 1788138568Ssam */ 1789138568Ssam if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 1790138568Ssam ic->ic_opmode != IEEE80211_M_IBSS) { 1791138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1792138568Ssam "%s: re-enable use of short slot time\n", 1793138568Ssam __func__); 1794138568Ssam ieee80211_set_shortslottime(ic, 1); 1795138568Ssam } 1796138568Ssam } 1797138568Ssam } 1798138568Ssam /* 1799138568Ssam * If a non-ERP station do the protection-related bookkeeping. 1800138568Ssam */ 1801138568Ssam if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 1802138568Ssam KASSERT(ic->ic_nonerpsta > 0, 1803138568Ssam ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 1804138568Ssam ic->ic_nonerpsta--; 1805138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1806138568Ssam "[%s] non-ERP station leaves, count now %d\n", 1807138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1808138568Ssam if (ic->ic_nonerpsta == 0) { 1809138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1810138568Ssam "%s: disable use of protection\n", __func__); 1811138568Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1812138568Ssam /* XXX verify mode? */ 1813138568Ssam if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 1814138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1815138568Ssam "%s: re-enable use of short preamble\n", 1816138568Ssam __func__); 1817138568Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1818138568Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1819138568Ssam } 1820153973Ssam ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE; 1821138568Ssam } 1822138568Ssam } 1823138568Ssam} 1824138568Ssam 1825138568Ssam/* 1826138568Ssam * Handle bookkeeping for station deauthentication/disassociation 1827138568Ssam * when operating as an ap. 1828138568Ssam */ 1829138568Ssamvoid 1830138568Ssamieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 1831138568Ssam{ 1832140499Ssam struct ieee80211_node_table *nt = ni->ni_table; 1833138568Ssam 1834138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1835138568Ssam "[%s] station with aid %d leaves\n", 1836138568Ssam ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni)); 1837138568Ssam 1838170530Ssam KASSERT(ic->ic_opmode != IEEE80211_M_STA, 1839138568Ssam ("unexpected operating mode %u", ic->ic_opmode)); 1840138568Ssam /* 1841138568Ssam * If node wasn't previously associated all 1842138568Ssam * we need to do is reclaim the reference. 1843138568Ssam */ 1844138568Ssam /* XXX ibss mode bypasses 11g and notification */ 1845138568Ssam if (ni->ni_associd == 0) 1846138568Ssam goto done; 1847138568Ssam /* 1848138568Ssam * Tell the authenticator the station is leaving. 1849138568Ssam * Note that we must do this before yanking the 1850138568Ssam * association id as the authenticator uses the 1851138568Ssam * associd to locate it's state block. 1852138568Ssam */ 1853138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1854138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1855138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1856138568Ssam ni->ni_associd = 0; 1857138568Ssam ic->ic_sta_assoc--; 1858138568Ssam 1859170530Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1860170530Ssam IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 1861138568Ssam ieee80211_node_leave_11g(ic, ni); 1862138568Ssam /* 1863138568Ssam * Cleanup station state. In particular clear various 1864138568Ssam * state that might otherwise be reused if the node 1865138568Ssam * is reused before the reference count goes to zero 1866138568Ssam * (and memory is reclaimed). 1867138568Ssam */ 1868138568Ssam ieee80211_sta_leave(ic, ni); 1869138568Ssamdone: 1870140499Ssam /* 1871140499Ssam * Remove the node from any table it's recorded in and 1872140499Ssam * drop the caller's reference. Removal from the table 1873140499Ssam * is important to insure the node is not reprocessed 1874140499Ssam * for inactivity. 1875140499Ssam */ 1876140499Ssam if (nt != NULL) { 1877140499Ssam IEEE80211_NODE_LOCK(nt); 1878140499Ssam node_reclaim(nt, ni); 1879140499Ssam IEEE80211_NODE_UNLOCK(nt); 1880140499Ssam } else 1881140499Ssam ieee80211_free_node(ni); 1882138568Ssam} 1883138568Ssam 1884170530Ssamint8_t 1885138568Ssamieee80211_getrssi(struct ieee80211com *ic) 1886138568Ssam{ 1887138568Ssam#define NZ(x) ((x) == 0 ? 1 : (x)) 1888140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1889170530Ssam int rssi_samples; 1890170530Ssam int32_t rssi_total; 1891138568Ssam struct ieee80211_node *ni; 1892138568Ssam 1893138568Ssam rssi_total = 0; 1894138568Ssam rssi_samples = 0; 1895138568Ssam switch (ic->ic_opmode) { 1896138568Ssam case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 1897138568Ssam case IEEE80211_M_AHDEMO: /* average of all neighbors */ 1898138568Ssam case IEEE80211_M_HOSTAP: /* average of all associated stations */ 1899138568Ssam /* XXX locking */ 1900140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 1901170530Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP || 1902170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS)) { 1903170530Ssam int8_t rssi = ic->ic_node_getrssi(ni); 1904170530Ssam if (rssi != 0) { 1905170530Ssam rssi_samples++; 1906170530Ssam rssi_total += rssi; 1907170530Ssam } 1908138568Ssam } 1909138568Ssam break; 1910138568Ssam case IEEE80211_M_MONITOR: /* XXX */ 1911138568Ssam case IEEE80211_M_STA: /* use stats from associated ap */ 1912138568Ssam default: 1913138568Ssam if (ic->ic_bss != NULL) 1914138568Ssam rssi_total = ic->ic_node_getrssi(ic->ic_bss); 1915138568Ssam rssi_samples = 1; 1916138568Ssam break; 1917138568Ssam } 1918138568Ssam return rssi_total / NZ(rssi_samples); 1919138568Ssam#undef NZ 1920138568Ssam} 1921138568Ssam 1922170530Ssamvoid 1923170530Ssamieee80211_getsignal(struct ieee80211com *ic, int8_t *rssi, int8_t *noise) 1924138568Ssam{ 1925138568Ssam 1926170530Ssam if (ic->ic_bss == NULL) /* NB: shouldn't happen */ 1927170530Ssam return; 1928170530Ssam ic->ic_node_getsignal(ic->ic_bss, rssi, noise); 1929170530Ssam /* for non-station mode return avg'd rssi accounting */ 1930170530Ssam if (ic->ic_opmode != IEEE80211_M_STA) 1931170530Ssam *rssi = ieee80211_getrssi(ic); 1932138568Ssam} 1933138568Ssam 1934138568Ssam/* 1935138568Ssam * Node table support. 1936138568Ssam */ 1937138568Ssam 1938138568Ssamstatic void 1939138568Ssamieee80211_node_table_init(struct ieee80211com *ic, 1940138568Ssam struct ieee80211_node_table *nt, 1941170530Ssam const char *name, int inact, int keyixmax) 1942138568Ssam{ 1943138568Ssam 1944138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1945138568Ssam "%s %s table, inact %u\n", __func__, name, inact); 1946138568Ssam 1947138568Ssam nt->nt_ic = ic; 1948138568Ssam /* XXX need unit */ 1949138568Ssam IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1950138568Ssam IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1951138568Ssam TAILQ_INIT(&nt->nt_node); 1952138568Ssam nt->nt_name = name; 1953138568Ssam nt->nt_scangen = 1; 1954138568Ssam nt->nt_inact_init = inact; 1955148863Ssam nt->nt_keyixmax = keyixmax; 1956148863Ssam if (nt->nt_keyixmax > 0) { 1957148863Ssam MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 1958148863Ssam keyixmax * sizeof(struct ieee80211_node *), 1959148863Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 1960148863Ssam if (nt->nt_keyixmap == NULL) 1961148863Ssam if_printf(ic->ic_ifp, 1962148863Ssam "Cannot allocate key index map with %u entries\n", 1963148863Ssam keyixmax); 1964148863Ssam } else 1965148863Ssam nt->nt_keyixmap = NULL; 1966138568Ssam} 1967138568Ssam 1968170530Ssamstatic void 1969138568Ssamieee80211_node_table_reset(struct ieee80211_node_table *nt) 1970138568Ssam{ 1971138568Ssam 1972138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1973138568Ssam "%s %s table\n", __func__, nt->nt_name); 1974138568Ssam 1975138568Ssam IEEE80211_NODE_LOCK(nt); 1976138568Ssam ieee80211_free_allnodes_locked(nt); 1977138568Ssam IEEE80211_NODE_UNLOCK(nt); 1978138568Ssam} 1979138568Ssam 1980138568Ssamstatic void 1981138568Ssamieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1982138568Ssam{ 1983138568Ssam 1984138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1985138568Ssam "%s %s table\n", __func__, nt->nt_name); 1986138568Ssam 1987148863Ssam IEEE80211_NODE_LOCK(nt); 1988138568Ssam ieee80211_free_allnodes_locked(nt); 1989148863Ssam if (nt->nt_keyixmap != NULL) { 1990148863Ssam /* XXX verify all entries are NULL */ 1991148863Ssam int i; 1992148863Ssam for (i = 0; i < nt->nt_keyixmax; i++) 1993148863Ssam if (nt->nt_keyixmap[i] != NULL) 1994148863Ssam printf("%s: %s[%u] still active\n", __func__, 1995148863Ssam nt->nt_name, i); 1996148863Ssam FREE(nt->nt_keyixmap, M_80211_NODE); 1997148863Ssam nt->nt_keyixmap = NULL; 1998148863Ssam } 1999138568Ssam IEEE80211_SCAN_LOCK_DESTROY(nt); 2000138568Ssam IEEE80211_NODE_LOCK_DESTROY(nt); 2001138568Ssam} 2002