ieee80211_node.c revision 172062
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 172062 2007-09-06 00:04:36Z 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{ 197138568Ssam ni->ni_flags &= ~IEEE80211_NODE_AUTH; 198172062Ssam ni->ni_inact_reload = ic->ic_inact_auth; 199172062Ssam if (ni->ni_inact > ni->ni_inact_reload) 200172062Ssam ni->ni_inact = ni->ni_inact_reload; 201138568Ssam} 202138568Ssam 203116742Ssam/* 204138568Ssam * Set/change the channel. The rate set is also updated as 205138568Ssam * to insure a consistent view by drivers. 206138568Ssam */ 207153351Ssamstatic void 208170530Ssamieee80211_node_set_chan(struct ieee80211com *ic, struct ieee80211_node *ni) 209138568Ssam{ 210170530Ssam struct ieee80211_channel *chan = ic->ic_bsschan; 211170530Ssam 212170530Ssam#if 0 213170530Ssam KASSERT(chan != IEEE80211_CHAN_ANYC, ("bss channel not setup")); 214170530Ssam#else 215153351Ssam if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */ 216153351Ssam chan = ic->ic_curchan; 217170530Ssam#endif 218138568Ssam ni->ni_chan = chan; 219170530Ssam if (IEEE80211_IS_CHAN_HT(chan)) { 220170530Ssam /* 221170530Ssam * XXX Gotta be careful here; the rate set returned by 222170530Ssam * ieee80211_get_suprates is actually any HT rate 223170530Ssam * set so blindly copying it will be bad. We must 224170530Ssam * install the legacy rate est in ni_rates and the 225170530Ssam * HT rate set in ni_htrates. 226170530Ssam */ 227170530Ssam ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); 228170530Ssam } 229165569Ssam ni->ni_rates = *ieee80211_get_suprates(ic, chan); 230138568Ssam} 231138568Ssam 232138568Ssam/* 233156358Ssam * Probe the curent channel, if allowed, while scanning. 234156358Ssam * If the channel is not marked passive-only then send 235156358Ssam * a probe request immediately. Otherwise mark state and 236156358Ssam * listen for beacons on the channel; if we receive something 237156358Ssam * then we'll transmit a probe request. 238156358Ssam */ 239156358Ssamvoid 240156358Ssamieee80211_probe_curchan(struct ieee80211com *ic, int force) 241156358Ssam{ 242156358Ssam struct ifnet *ifp = ic->ic_ifp; 243156358Ssam 244156358Ssam if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 || force) { 245156358Ssam /* 246156358Ssam * XXX send both broadcast+directed probe request 247156358Ssam */ 248156358Ssam ieee80211_send_probereq(ic->ic_bss, 249156358Ssam ic->ic_myaddr, ifp->if_broadcastaddr, 250156358Ssam ifp->if_broadcastaddr, 251170530Ssam ic->ic_des_ssid[0].ssid, ic->ic_des_ssid[0].len, 252156358Ssam ic->ic_opt_ie, ic->ic_opt_ie_len); 253156358Ssam } else 254156358Ssam ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN; 255156358Ssam} 256156358Ssam 257141658Ssamstatic __inline void 258141658Ssamcopy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) 259141658Ssam{ 260141658Ssam /* propagate useful state */ 261141658Ssam nbss->ni_authmode = obss->ni_authmode; 262141658Ssam nbss->ni_txpower = obss->ni_txpower; 263141658Ssam nbss->ni_vlan = obss->ni_vlan; 264141658Ssam nbss->ni_rsn = obss->ni_rsn; 265141658Ssam /* XXX statistics? */ 266141658Ssam} 267141658Ssam 268116742Ssamvoid 269116742Ssamieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 270116742Ssam{ 271140753Ssam struct ieee80211_node_table *nt; 272116742Ssam struct ieee80211_node *ni; 273116742Ssam 274138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 275138568Ssam "%s: creating ibss\n", __func__); 276138568Ssam 277138568Ssam /* 278138568Ssam * Create the station/neighbor table. Note that for adhoc 279138568Ssam * mode we make the initial inactivity timer longer since 280138568Ssam * we create nodes only through discovery and they typically 281138568Ssam * are long-lived associations. 282138568Ssam */ 283140753Ssam nt = &ic->ic_sta; 284140753Ssam IEEE80211_NODE_LOCK(nt); 285140753Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 286140753Ssam nt->nt_name = "station"; 287140753Ssam nt->nt_inact_init = ic->ic_inact_init; 288140753Ssam } else { 289140753Ssam nt->nt_name = "neighbor"; 290140753Ssam nt->nt_inact_init = ic->ic_inact_run; 291140753Ssam } 292140753Ssam IEEE80211_NODE_UNLOCK(nt); 293140753Ssam 294148863Ssam ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 295140753Ssam if (ni == NULL) { 296140753Ssam /* XXX recovery? */ 297138568Ssam return; 298138568Ssam } 299116742Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 300170530Ssam ni->ni_esslen = ic->ic_des_ssid[0].len; 301170530Ssam memcpy(ni->ni_essid, ic->ic_des_ssid[0].ssid, ni->ni_esslen); 302170530Ssam if (ic->ic_bss != NULL) 303170530Ssam copy_bss(ni, ic->ic_bss); 304148843Ssam ni->ni_intval = ic->ic_bintval; 305138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 306116742Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 307116742Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 308116742Ssam ni->ni_fhdwell = 200; /* XXX */ 309116742Ssam ni->ni_fhindex = 1; 310116742Ssam } 311138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 312138568Ssam ic->ic_flags |= IEEE80211_F_SIBSS; 313138568Ssam ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ 314143300Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 315143300Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 316167282Ssam else { 317167282Ssam get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); 318167282Ssam /* clear group bit, add local bit */ 319167282Ssam ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; 320167282Ssam } 321153403Ssam } else if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 322153403Ssam if (ic->ic_flags & IEEE80211_F_DESBSSID) 323153403Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 324153403Ssam else 325153403Ssam memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); 326138568Ssam } 327138568Ssam /* 328138568Ssam * Fix the channel and related attributes. 329138568Ssam */ 330170530Ssam ic->ic_bsschan = chan; 331170530Ssam ieee80211_node_set_chan(ic, ni); 332170530Ssam ic->ic_curmode = ieee80211_chan2mode(chan); 333138568Ssam /* 334138568Ssam * Do mode-specific rate setup. 335138568Ssam */ 336170530Ssam if (IEEE80211_IS_CHAN_FULL(chan)) { 337170530Ssam if (IEEE80211_IS_CHAN_ANYG(chan)) { 338170530Ssam /* 339170530Ssam * Use a mixed 11b/11g rate set. 340170530Ssam */ 341170530Ssam ieee80211_set11gbasicrates(&ni->ni_rates, 342170530Ssam IEEE80211_MODE_11G); 343170530Ssam } else if (IEEE80211_IS_CHAN_B(chan)) { 344170530Ssam /* 345170530Ssam * Force pure 11b rate set. 346170530Ssam */ 347170530Ssam ieee80211_set11gbasicrates(&ni->ni_rates, 348170530Ssam IEEE80211_MODE_11B); 349170530Ssam } 350170530Ssam } 351138568Ssam 352170530Ssam (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); 353116742Ssam} 354116742Ssam 355170530Ssam/* 356170530Ssam * Reset bss state on transition to the INIT state. 357170530Ssam * Clear any stations from the table (they have been 358170530Ssam * deauth'd) and reset the bss node (clears key, rate 359170530Ssam * etc. state). 360170530Ssam */ 361138568Ssamvoid 362138568Ssamieee80211_reset_bss(struct ieee80211com *ic) 363138568Ssam{ 364138568Ssam struct ieee80211_node *ni, *obss; 365138568Ssam 366170530Ssam callout_drain(&ic->ic_inact); 367140753Ssam ieee80211_node_table_reset(&ic->ic_sta); 368170530Ssam ieee80211_reset_erp(ic); 369140753Ssam 370170530Ssam ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr); 371138568Ssam KASSERT(ni != NULL, ("unable to setup inital BSS node")); 372138568Ssam obss = ic->ic_bss; 373138568Ssam ic->ic_bss = ieee80211_ref_node(ni); 374141658Ssam if (obss != NULL) { 375141658Ssam copy_bss(ni, obss); 376148843Ssam ni->ni_intval = ic->ic_bintval; 377138568Ssam ieee80211_free_node(obss); 378141658Ssam } 379138568Ssam} 380138568Ssam 381170530Ssamstatic int 382170530Ssammatch_ssid(const struct ieee80211_node *ni, 383170530Ssam int nssid, const struct ieee80211_scan_ssid ssids[]) 384170530Ssam{ 385170530Ssam int i; 386148432Ssam 387170530Ssam for (i = 0; i < nssid; i++) { 388170530Ssam if (ni->ni_esslen == ssids[i].len && 389170530Ssam memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) 390170530Ssam return 1; 391170530Ssam } 392170530Ssam return 0; 393170530Ssam} 394170530Ssam 395170530Ssam/* 396170530Ssam * Test a node for suitability/compatibility. 397170530Ssam */ 398127767Ssamstatic int 399170530Ssamcheck_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 400127767Ssam{ 401170530Ssam uint8_t rate; 402170530Ssam 403170530Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 404170530Ssam return 0; 405170530Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 406170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 407170530Ssam return 0; 408170530Ssam } else { 409170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 410170530Ssam return 0; 411170530Ssam } 412170530Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 413170530Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 414170530Ssam return 0; 415170530Ssam } else { 416170530Ssam /* XXX does this mean privacy is supported or required? */ 417170530Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 418170530Ssam return 0; 419170530Ssam } 420170530Ssam rate = ieee80211_fix_rate(ni, &ni->ni_rates, 421170530Ssam IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 422170530Ssam if (rate & IEEE80211_RATE_BASIC) 423170530Ssam return 0; 424170530Ssam if (ic->ic_des_nssid != 0 && 425170530Ssam !match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid)) 426170530Ssam return 0; 427170530Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 428170530Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 429170530Ssam return 0; 430170530Ssam return 1; 431170530Ssam} 432170530Ssam 433170530Ssam#ifdef IEEE80211_DEBUG 434170530Ssam/* 435170530Ssam * Display node suitability/compatibility. 436170530Ssam */ 437170530Ssamstatic void 438170530Ssamcheck_bss_debug(struct ieee80211com *ic, struct ieee80211_node *ni) 439170530Ssam{ 440170530Ssam uint8_t rate; 441127767Ssam int fail; 442127767Ssam 443127767Ssam fail = 0; 444127767Ssam if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 445127767Ssam fail |= 0x01; 446127767Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 447127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 448127767Ssam fail |= 0x02; 449127767Ssam } else { 450127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 451127767Ssam fail |= 0x02; 452127767Ssam } 453138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 454127767Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 455127767Ssam fail |= 0x04; 456127767Ssam } else { 457127767Ssam /* XXX does this mean privacy is supported or required? */ 458127767Ssam if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 459127767Ssam fail |= 0x04; 460127767Ssam } 461167442Ssam rate = ieee80211_fix_rate(ni, &ni->ni_rates, 462165887Ssam IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); 463127767Ssam if (rate & IEEE80211_RATE_BASIC) 464127767Ssam fail |= 0x08; 465170530Ssam if (ic->ic_des_nssid != 0 && 466170530Ssam !match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid)) 467127767Ssam fail |= 0x10; 468127767Ssam if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 469127767Ssam !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 470127767Ssam fail |= 0x20; 471127767Ssam 472170530Ssam printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); 473170530Ssam printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); 474170530Ssam printf(" %3d%c", 475170530Ssam ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); 476170530Ssam printf(" %+4d", ni->ni_rssi); 477170530Ssam printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 478170530Ssam fail & 0x08 ? '!' : ' '); 479170530Ssam printf(" %4s%c", 480170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 481170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 482170530Ssam "????", 483170530Ssam fail & 0x02 ? '!' : ' '); 484170530Ssam printf(" %3s%c ", 485170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", 486170530Ssam fail & 0x04 ? '!' : ' '); 487170530Ssam ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 488170530Ssam printf("%s\n", fail & 0x10 ? "!" : ""); 489138568Ssam} 490170530Ssam#endif /* IEEE80211_DEBUG */ 491138568Ssam 492138568Ssam/* 493138568Ssam * Handle 802.11 ad hoc network merge. The 494138568Ssam * convention, set by the Wireless Ethernet Compatibility Alliance 495138568Ssam * (WECA), is that an 802.11 station will change its BSSID to match 496138568Ssam * the "oldest" 802.11 ad hoc network, on the same channel, that 497138568Ssam * has the station's desired SSID. The "oldest" 802.11 network 498138568Ssam * sends beacons with the greatest TSF timestamp. 499138568Ssam * 500138568Ssam * The caller is assumed to validate TSF's before attempting a merge. 501138568Ssam * 502138568Ssam * Return !0 if the BSSID changed, 0 otherwise. 503138568Ssam */ 504138568Ssamint 505148306Ssamieee80211_ibss_merge(struct ieee80211_node *ni) 506138568Ssam{ 507148306Ssam struct ieee80211com *ic = ni->ni_ic; 508138568Ssam 509140453Ssam if (ni == ic->ic_bss || 510140453Ssam IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) { 511138568Ssam /* unchanged, nothing to do */ 512138568Ssam return 0; 513138568Ssam } 514170530Ssam if (!check_bss(ic, ni)) { 515170530Ssam /* capabilities mismatch */ 516138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 517138568Ssam "%s: merge failed, capabilities mismatch\n", __func__); 518170530Ssam#ifdef IEEE80211_DEBUG 519170530Ssam if (ieee80211_msg_assoc(ic)) 520170530Ssam check_bss_debug(ic, ni); 521170530Ssam#endif 522138568Ssam ic->ic_stats.is_ibss_capmismatch++; 523138568Ssam return 0; 524138568Ssam } 525138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 526138568Ssam "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, 527138568Ssam ether_sprintf(ni->ni_bssid), 528138568Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 529138568Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 530138568Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "" 531138568Ssam ); 532170530Ssam return ieee80211_sta_join1(ieee80211_ref_node(ni)); 533138568Ssam} 534138568Ssam 535138568Ssam/* 536138568Ssam * Join the specified IBSS/BSS network. The node is assumed to 537138568Ssam * be passed in with a held reference. 538138568Ssam */ 539170530Ssamstatic int 540170530Ssamieee80211_sta_join1(struct ieee80211_node *selbs) 541138568Ssam{ 542170530Ssam struct ieee80211com *ic = selbs->ni_ic; 543138568Ssam struct ieee80211_node *obss; 544170530Ssam int canreassoc; 545138568Ssam 546116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 547140753Ssam struct ieee80211_node_table *nt; 548138568Ssam /* 549140753Ssam * Fillin the neighbor table; it will already 550139521Ssam * exist if we are simply switching mastership. 551140753Ssam * XXX ic_sta always setup so this is unnecessary? 552127772Ssam */ 553140753Ssam nt = &ic->ic_sta; 554140753Ssam IEEE80211_NODE_LOCK(nt); 555140753Ssam nt->nt_name = "neighbor"; 556140753Ssam nt->nt_inact_init = ic->ic_inact_run; 557140753Ssam IEEE80211_NODE_UNLOCK(nt); 558138568Ssam } 559138568Ssam 560138568Ssam /* 561138568Ssam * Committed to selbs, setup state. 562138568Ssam */ 563138568Ssam obss = ic->ic_bss; 564170530Ssam /* 565170530Ssam * Check if old+new node have the same address in which 566170530Ssam * case we can reassociate when operating in sta mode. 567170530Ssam */ 568170530Ssam canreassoc = (obss != NULL && 569170530Ssam ic->ic_state == IEEE80211_S_RUN && 570170530Ssam IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); 571140753Ssam ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */ 572153352Ssam if (obss != NULL) { 573153352Ssam copy_bss(selbs, obss); 574138568Ssam ieee80211_free_node(obss); 575153352Ssam } 576165887Ssam 577138568Ssam /* 578165887Ssam * Delete unusable rates; we've already checked 579165887Ssam * that the negotiated rate set is acceptable. 580165887Ssam */ 581167442Ssam ieee80211_fix_rate(ic->ic_bss, &ic->ic_bss->ni_rates, 582167442Ssam IEEE80211_F_DODEL | IEEE80211_F_JOIN); 583165887Ssam 584170530Ssam ic->ic_bsschan = selbs->ni_chan; 585170530Ssam ic->ic_curchan = ic->ic_bsschan; 586170530Ssam ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); 587170530Ssam ic->ic_set_channel(ic); 588165887Ssam /* 589138568Ssam * Set the erp state (mostly the slot time) to deal with 590138568Ssam * the auto-select case; this should be redundant if the 591138568Ssam * mode is locked. 592138568Ssam */ 593138568Ssam ieee80211_reset_erp(ic); 594138568Ssam ieee80211_wme_initparams(ic); 595140753Ssam 596170530Ssam if (ic->ic_opmode == IEEE80211_M_STA) { 597170530Ssam if (canreassoc) { 598170530Ssam /* Reassociate */ 599170530Ssam ieee80211_new_state(ic, IEEE80211_S_ASSOC, 1); 600170530Ssam } else { 601170530Ssam /* 602170530Ssam * Act as if we received a DEAUTH frame in case we 603170530Ssam * are invoked from the RUN state. This will cause 604170530Ssam * us to try to re-authenticate if we are operating 605170530Ssam * as a station. 606170530Ssam */ 607170530Ssam ieee80211_new_state(ic, IEEE80211_S_AUTH, 608170530Ssam IEEE80211_FC0_SUBTYPE_DEAUTH); 609170530Ssam } 610170530Ssam } else 611117811Ssam ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 612138568Ssam return 1; 613116742Ssam} 614116742Ssam 615170530Ssamint 616170530Ssamieee80211_sta_join(struct ieee80211com *ic, 617170530Ssam const struct ieee80211_scan_entry *se) 618170530Ssam{ 619170530Ssam struct ieee80211_node *ni; 620170530Ssam 621170530Ssam ni = ieee80211_alloc_node(&ic->ic_sta, se->se_macaddr); 622170530Ssam if (ni == NULL) { 623170530Ssam /* XXX msg */ 624170530Ssam return 0; 625170530Ssam } 626170530Ssam /* 627170530Ssam * Expand scan state into node's format. 628170530Ssam * XXX may not need all this stuff 629170530Ssam */ 630170530Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); 631170530Ssam ni->ni_esslen = se->se_ssid[1]; 632170530Ssam memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); 633170530Ssam ni->ni_rstamp = se->se_rstamp; 634170530Ssam ni->ni_tstamp.tsf = se->se_tstamp.tsf; 635170530Ssam ni->ni_intval = se->se_intval; 636170530Ssam ni->ni_capinfo = se->se_capinfo; 637170530Ssam /* XXX shift to 11n channel if htinfo present */ 638170530Ssam ni->ni_chan = se->se_chan; 639170530Ssam ni->ni_timoff = se->se_timoff; 640170530Ssam ni->ni_fhdwell = se->se_fhdwell; 641170530Ssam ni->ni_fhindex = se->se_fhindex; 642170530Ssam ni->ni_erp = se->se_erp; 643170530Ssam ni->ni_rssi = se->se_rssi; 644170530Ssam ni->ni_noise = se->se_noise; 645170530Ssam if (se->se_htcap_ie != NULL) 646170530Ssam ieee80211_ht_node_init(ni, se->se_htcap_ie); 647170530Ssam if (se->se_htinfo_ie != NULL) 648170530Ssam ieee80211_parse_htinfo(ni, se->se_htinfo_ie); 649170530Ssam if (se->se_wpa_ie != NULL) 650170530Ssam ieee80211_saveie(&ni->ni_wpa_ie, se->se_wpa_ie); 651170530Ssam if (se->se_rsn_ie != NULL) 652170530Ssam ieee80211_saveie(&ni->ni_rsn_ie, se->se_rsn_ie); 653170530Ssam if (se->se_wme_ie != NULL) 654170530Ssam ieee80211_saveie(&ni->ni_wme_ie, se->se_wme_ie); 655170530Ssam if (se->se_ath_ie != NULL) 656170530Ssam ieee80211_saveath(ni, se->se_ath_ie); 657170530Ssam 658170530Ssam ic->ic_dtim_period = se->se_dtimperiod; 659170530Ssam ic->ic_dtim_count = 0; 660170530Ssam 661170530Ssam /* NB: must be after ni_chan is setup */ 662170530Ssam ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, 663170530Ssam IEEE80211_F_DOSORT); 664170530Ssam if (se->se_htcap_ie != NULL) 665170530Ssam ieee80211_setup_htrates(ni, se->se_htcap_ie, IEEE80211_F_JOIN); 666170530Ssam if (se->se_htinfo_ie != NULL) 667170530Ssam ieee80211_setup_basic_htrates(ni, se->se_htinfo_ie); 668170530Ssam 669170530Ssam return ieee80211_sta_join1(ieee80211_ref_node(ni)); 670170530Ssam} 671170530Ssam 672138568Ssam/* 673138568Ssam * Leave the specified IBSS/BSS network. The node is assumed to 674138568Ssam * be passed in with a held reference. 675138568Ssam */ 676138568Ssamvoid 677138568Ssamieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 678138568Ssam{ 679138568Ssam ic->ic_node_cleanup(ni); 680138568Ssam ieee80211_notify_node_leave(ic, ni); 681138568Ssam} 682138568Ssam 683116742Ssamstatic struct ieee80211_node * 684138568Ssamnode_alloc(struct ieee80211_node_table *nt) 685116742Ssam{ 686127768Ssam struct ieee80211_node *ni; 687138568Ssam 688127768Ssam MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 689127768Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 690127768Ssam return ni; 691116742Ssam} 692116742Ssam 693138568Ssam/* 694138568Ssam * Reclaim any resources in a node and reset any critical 695138568Ssam * state. Typically nodes are free'd immediately after, 696138568Ssam * but in some cases the storage may be reused so we need 697138568Ssam * to insure consistent state (should probably fix that). 698138568Ssam */ 699116742Ssamstatic void 700138568Ssamnode_cleanup(struct ieee80211_node *ni) 701116742Ssam{ 702138568Ssam#define N(a) (sizeof(a)/sizeof(a[0])) 703138568Ssam struct ieee80211com *ic = ni->ni_ic; 704170530Ssam int i; 705138568Ssam 706138568Ssam /* NB: preserve ni_table */ 707138568Ssam if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { 708138568Ssam ic->ic_ps_sta--; 709138568Ssam ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; 710138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 711138568Ssam "[%s] power save mode off, %u sta's in ps mode\n", 712138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta); 713138568Ssam } 714147788Ssam /* 715147788Ssam * Clear AREF flag that marks the authorization refcnt bump 716147788Ssam * has happened. This is probably not needed as the node 717147788Ssam * should always be removed from the table so not found but 718147788Ssam * do it just in case. 719147788Ssam */ 720147788Ssam ni->ni_flags &= ~IEEE80211_NODE_AREF; 721138568Ssam 722138568Ssam /* 723138568Ssam * Drain power save queue and, if needed, clear TIM. 724138568Ssam */ 725170530Ssam if (ieee80211_node_saveq_drain(ni) != 0 && ic->ic_set_tim != NULL) 726148304Ssam ic->ic_set_tim(ni, 0); 727138568Ssam 728138568Ssam ni->ni_associd = 0; 729138568Ssam if (ni->ni_challenge != NULL) { 730170530Ssam FREE(ni->ni_challenge, M_80211_NODE); 731138568Ssam ni->ni_challenge = NULL; 732138568Ssam } 733138568Ssam /* 734138568Ssam * Preserve SSID, WPA, and WME ie's so the bss node is 735138568Ssam * reusable during a re-auth/re-assoc state transition. 736138568Ssam * If we remove these data they will not be recreated 737138568Ssam * because they come from a probe-response or beacon frame 738138568Ssam * which cannot be expected prior to the association-response. 739138568Ssam * This should not be an issue when operating in other modes 740138568Ssam * as stations leaving always go through a full state transition 741138568Ssam * which will rebuild this state. 742138568Ssam * 743138568Ssam * XXX does this leave us open to inheriting old state? 744138568Ssam */ 745138568Ssam for (i = 0; i < N(ni->ni_rxfrag); i++) 746138568Ssam if (ni->ni_rxfrag[i] != NULL) { 747138568Ssam m_freem(ni->ni_rxfrag[i]); 748138568Ssam ni->ni_rxfrag[i] = NULL; 749138568Ssam } 750148863Ssam /* 751148863Ssam * Must be careful here to remove any key map entry w/o a LOR. 752148863Ssam */ 753148863Ssam ieee80211_node_delucastkey(ni); 754138568Ssam#undef N 755116742Ssam} 756116742Ssam 757116742Ssamstatic void 758138568Ssamnode_free(struct ieee80211_node *ni) 759116742Ssam{ 760138568Ssam struct ieee80211com *ic = ni->ni_ic; 761138568Ssam 762138568Ssam ic->ic_node_cleanup(ni); 763138568Ssam if (ni->ni_wpa_ie != NULL) 764170530Ssam FREE(ni->ni_wpa_ie, M_80211_NODE); 765170530Ssam if (ni->ni_rsn_ie != NULL) 766170530Ssam FREE(ni->ni_rsn_ie, M_80211_NODE); 767138568Ssam if (ni->ni_wme_ie != NULL) 768170530Ssam FREE(ni->ni_wme_ie, M_80211_NODE); 769170530Ssam if (ni->ni_ath_ie != NULL) 770170530Ssam FREE(ni->ni_ath_ie, M_80211_NODE); 771138568Ssam IEEE80211_NODE_SAVEQ_DESTROY(ni); 772138568Ssam FREE(ni, M_80211_NODE); 773116742Ssam} 774116742Ssam 775170530Ssamstatic int8_t 776138568Ssamnode_getrssi(const struct ieee80211_node *ni) 777120104Ssam{ 778120104Ssam return ni->ni_rssi; 779120104Ssam} 780120104Ssam 781116742Ssamstatic void 782170530Ssamnode_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) 783170530Ssam{ 784170530Ssam *rssi = ni->ni_rssi; 785170530Ssam *noise = ni->ni_noise; 786170530Ssam} 787170530Ssam 788170530Ssamstatic void 789138568Ssamieee80211_setup_node(struct ieee80211_node_table *nt, 790170530Ssam struct ieee80211_node *ni, const uint8_t *macaddr) 791116742Ssam{ 792138568Ssam struct ieee80211com *ic = nt->nt_ic; 793116742Ssam int hash; 794116742Ssam 795138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 796140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 797138568Ssam ether_sprintf(macaddr), nt->nt_name); 798138568Ssam 799116742Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 800116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 801138568Ssam ieee80211_node_initref(ni); /* mark referenced */ 802138568Ssam ni->ni_chan = IEEE80211_CHAN_ANYC; 803138568Ssam ni->ni_authmode = IEEE80211_AUTH_OPEN; 804138568Ssam ni->ni_txpower = ic->ic_txpowlimit; /* max power */ 805138568Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); 806139528Ssam ni->ni_inact_reload = nt->nt_inact_init; 807139528Ssam ni->ni_inact = ni->ni_inact_reload; 808170530Ssam ni->ni_ath_defkeyix = 0x7fff; 809138568Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 810138568Ssam 811138568Ssam IEEE80211_NODE_LOCK(nt); 812138568Ssam TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); 813138568Ssam LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); 814138568Ssam ni->ni_table = nt; 815138568Ssam ni->ni_ic = ic; 816138568Ssam IEEE80211_NODE_UNLOCK(nt); 817116742Ssam} 818116742Ssam 819116742Ssamstruct ieee80211_node * 820170530Ssamieee80211_alloc_node(struct ieee80211_node_table *nt, const uint8_t *macaddr) 821116742Ssam{ 822138568Ssam struct ieee80211com *ic = nt->nt_ic; 823138568Ssam struct ieee80211_node *ni; 824138568Ssam 825138568Ssam ni = ic->ic_node_alloc(nt); 826116742Ssam if (ni != NULL) 827138568Ssam ieee80211_setup_node(nt, ni, macaddr); 828127769Ssam else 829127769Ssam ic->ic_stats.is_rx_nodealloc++; 830116742Ssam return ni; 831116742Ssam} 832116742Ssam 833148777Ssam/* 834148777Ssam * Craft a temporary node suitable for sending a management frame 835148777Ssam * to the specified station. We craft only as much state as we 836148777Ssam * need to do the work since the node will be immediately reclaimed 837148777Ssam * once the send completes. 838148777Ssam */ 839116742Ssamstruct ieee80211_node * 840170530Ssamieee80211_tmp_node(struct ieee80211com *ic, const uint8_t *macaddr) 841148777Ssam{ 842148777Ssam struct ieee80211_node *ni; 843148777Ssam 844148777Ssam ni = ic->ic_node_alloc(&ic->ic_sta); 845148777Ssam if (ni != NULL) { 846148777Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 847148777Ssam "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); 848148777Ssam 849148777Ssam IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 850148777Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 851148777Ssam ieee80211_node_initref(ni); /* mark referenced */ 852148777Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 853148777Ssam /* NB: required by ieee80211_fix_rate */ 854170530Ssam ieee80211_node_set_chan(ic, ni); 855148777Ssam ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, 856148777Ssam IEEE80211_KEYIX_NONE); 857148777Ssam /* XXX optimize away */ 858148777Ssam IEEE80211_NODE_SAVEQ_INIT(ni, "unknown"); 859148777Ssam 860148777Ssam ni->ni_table = NULL; /* NB: pedantic */ 861148777Ssam ni->ni_ic = ic; 862148777Ssam } else { 863148777Ssam /* XXX msg */ 864148777Ssam ic->ic_stats.is_rx_nodealloc++; 865148777Ssam } 866148777Ssam return ni; 867148777Ssam} 868148777Ssam 869148777Ssamstruct ieee80211_node * 870170530Ssamieee80211_dup_bss(struct ieee80211_node_table *nt, const uint8_t *macaddr) 871116742Ssam{ 872138568Ssam struct ieee80211com *ic = nt->nt_ic; 873138568Ssam struct ieee80211_node *ni; 874138568Ssam 875138568Ssam ni = ic->ic_node_alloc(nt); 876116742Ssam if (ni != NULL) { 877138568Ssam ieee80211_setup_node(nt, ni, macaddr); 878127770Ssam /* 879127770Ssam * Inherit from ic_bss. 880127770Ssam */ 881138568Ssam ni->ni_authmode = ic->ic_bss->ni_authmode; 882138568Ssam ni->ni_txpower = ic->ic_bss->ni_txpower; 883138568Ssam ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */ 884127770Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 885170530Ssam ieee80211_node_set_chan(ic, ni); 886138568Ssam ni->ni_rsn = ic->ic_bss->ni_rsn; 887127770Ssam } else 888127770Ssam ic->ic_stats.is_rx_nodealloc++; 889116742Ssam return ni; 890116742Ssam} 891116742Ssam 892127772Ssamstatic struct ieee80211_node * 893138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 894138568Ssam_ieee80211_find_node_debug(struct ieee80211_node_table *nt, 895170530Ssam const uint8_t *macaddr, const char *func, int line) 896138568Ssam#else 897138568Ssam_ieee80211_find_node(struct ieee80211_node_table *nt, 898170530Ssam const uint8_t *macaddr) 899138568Ssam#endif 900116742Ssam{ 901116742Ssam struct ieee80211_node *ni; 902116742Ssam int hash; 903116742Ssam 904138568Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 905127772Ssam 906116742Ssam hash = IEEE80211_NODE_HASH(macaddr); 907138568Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 908116742Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 909138568Ssam ieee80211_ref_node(ni); /* mark referenced */ 910138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 911138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 912140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, 913140766Ssam func, line, 914140766Ssam ni, ether_sprintf(ni->ni_macaddr), 915140766Ssam ieee80211_node_refcnt(ni)); 916138568Ssam#endif 917127772Ssam return ni; 918116742Ssam } 919116742Ssam } 920127772Ssam return NULL; 921127772Ssam} 922138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 923138568Ssam#define _ieee80211_find_node(nt, mac) \ 924138568Ssam _ieee80211_find_node_debug(nt, mac, func, line) 925138568Ssam#endif 926127772Ssam 927127772Ssamstruct ieee80211_node * 928138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 929138568Ssamieee80211_find_node_debug(struct ieee80211_node_table *nt, 930170530Ssam const uint8_t *macaddr, const char *func, int line) 931138568Ssam#else 932170530Ssamieee80211_find_node(struct ieee80211_node_table *nt, const uint8_t *macaddr) 933138568Ssam#endif 934127772Ssam{ 935127772Ssam struct ieee80211_node *ni; 936127772Ssam 937138568Ssam IEEE80211_NODE_LOCK(nt); 938138568Ssam ni = _ieee80211_find_node(nt, macaddr); 939138568Ssam IEEE80211_NODE_UNLOCK(nt); 940116742Ssam return ni; 941116742Ssam} 942116742Ssam 943116742Ssam/* 944138568Ssam * Fake up a node; this handles node discovery in adhoc mode. 945138568Ssam * Note that for the driver's benefit we we treat this like 946138568Ssam * an association so the driver has an opportunity to setup 947138568Ssam * it's private state. 948138568Ssam */ 949138568Ssamstruct ieee80211_node * 950138568Ssamieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt, 951170530Ssam const uint8_t macaddr[IEEE80211_ADDR_LEN]) 952138568Ssam{ 953138568Ssam struct ieee80211com *ic = nt->nt_ic; 954138568Ssam struct ieee80211_node *ni; 955138568Ssam 956153073Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 957153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); 958138568Ssam ni = ieee80211_dup_bss(nt, macaddr); 959138568Ssam if (ni != NULL) { 960138568Ssam /* XXX no rate negotiation; just dup */ 961138568Ssam ni->ni_rates = ic->ic_bss->ni_rates; 962139524Ssam if (ic->ic_newassoc != NULL) 963148307Ssam ic->ic_newassoc(ni, 1); 964153404Ssam if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 965153404Ssam /* 966170530Ssam * In adhoc demo mode there are no management 967170530Ssam * frames to use to discover neighbor capabilities, 968170530Ssam * so blindly propagate the local configuration 969170530Ssam * so we can do interesting things (e.g. use 970170530Ssam * WME to disable ACK's). 971153404Ssam */ 972153404Ssam if (ic->ic_flags & IEEE80211_F_WME) 973153404Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 974170530Ssam if (ic->ic_flags & IEEE80211_F_FF) 975170530Ssam ni->ni_flags |= IEEE80211_NODE_FF; 976153404Ssam } 977170530Ssam /* XXX not right for 802.1x/WPA */ 978170530Ssam ieee80211_node_authorize(ni); 979138568Ssam } 980138568Ssam return ni; 981138568Ssam} 982138568Ssam 983148936Ssamvoid 984153073Ssamieee80211_init_neighbor(struct ieee80211_node *ni, 985153073Ssam const struct ieee80211_frame *wh, 986153073Ssam const struct ieee80211_scanparams *sp) 987153073Ssam{ 988153073Ssam ni->ni_esslen = sp->ssid[1]; 989153073Ssam memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); 990153073Ssam IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 991153073Ssam memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); 992153073Ssam ni->ni_intval = sp->bintval; 993153073Ssam ni->ni_capinfo = sp->capinfo; 994153073Ssam ni->ni_chan = ni->ni_ic->ic_curchan; 995153073Ssam ni->ni_fhdwell = sp->fhdwell; 996153073Ssam ni->ni_fhindex = sp->fhindex; 997153073Ssam ni->ni_erp = sp->erp; 998153073Ssam ni->ni_timoff = sp->timoff; 999153073Ssam if (sp->wme != NULL) 1000153073Ssam ieee80211_saveie(&ni->ni_wme_ie, sp->wme); 1001153073Ssam if (sp->wpa != NULL) 1002153073Ssam ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa); 1003170530Ssam if (sp->rsn != NULL) 1004170530Ssam ieee80211_saveie(&ni->ni_rsn_ie, sp->rsn); 1005170530Ssam if (sp->ath != NULL) 1006170530Ssam ieee80211_saveath(ni, sp->ath); 1007153073Ssam 1008153073Ssam /* NB: must be after ni_chan is setup */ 1009165887Ssam ieee80211_setup_rates(ni, sp->rates, sp->xrates, 1010165887Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1011165887Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1012153073Ssam} 1013153073Ssam 1014148936Ssam/* 1015148936Ssam * Do node discovery in adhoc mode on receipt of a beacon 1016148936Ssam * or probe response frame. Note that for the driver's 1017148936Ssam * benefit we we treat this like an association so the 1018148936Ssam * driver has an opportunity to setup it's private state. 1019148936Ssam */ 1020148936Ssamstruct ieee80211_node * 1021148936Ssamieee80211_add_neighbor(struct ieee80211com *ic, 1022148936Ssam const struct ieee80211_frame *wh, 1023148936Ssam const struct ieee80211_scanparams *sp) 1024148936Ssam{ 1025148936Ssam struct ieee80211_node *ni; 1026148936Ssam 1027153073Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1028153073Ssam "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); 1029148936Ssam ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */ 1030148936Ssam if (ni != NULL) { 1031153073Ssam ieee80211_init_neighbor(ni, wh, sp); 1032148936Ssam if (ic->ic_newassoc != NULL) 1033148936Ssam ic->ic_newassoc(ni, 1); 1034148936Ssam /* XXX not right for 802.1x/WPA */ 1035148936Ssam ieee80211_node_authorize(ni); 1036148936Ssam } 1037148936Ssam return ni; 1038148936Ssam} 1039148936Ssam 1040148863Ssam#define IS_CTL(wh) \ 1041148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) 1042148863Ssam#define IS_PSPOLL(wh) \ 1043148863Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) 1044170530Ssam#define IS_BAR(wh) \ 1045170530Ssam ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR) 1046170530Ssam 1047138568Ssam/* 1048138568Ssam * Locate the node for sender, track state, and then pass the 1049138568Ssam * (referenced) node up to the 802.11 layer for its use. We 1050138568Ssam * are required to pass some node so we fall back to ic_bss 1051138568Ssam * when this frame is from an unknown sender. The 802.11 layer 1052138568Ssam * knows this means the sender wasn't in the node table and 1053138568Ssam * acts accordingly. 1054138568Ssam */ 1055138568Ssamstruct ieee80211_node * 1056138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1057138568Ssamieee80211_find_rxnode_debug(struct ieee80211com *ic, 1058138568Ssam const struct ieee80211_frame_min *wh, const char *func, int line) 1059138568Ssam#else 1060138568Ssamieee80211_find_rxnode(struct ieee80211com *ic, 1061138568Ssam const struct ieee80211_frame_min *wh) 1062138568Ssam#endif 1063138568Ssam{ 1064138568Ssam struct ieee80211_node_table *nt; 1065138568Ssam struct ieee80211_node *ni; 1066138568Ssam 1067138568Ssam /* XXX check ic_bss first in station mode */ 1068138568Ssam /* XXX 4-address frames? */ 1069170530Ssam nt = &ic->ic_sta; 1070138568Ssam IEEE80211_NODE_LOCK(nt); 1071170530Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1072138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1073138568Ssam else 1074138568Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1075148863Ssam if (ni == NULL) 1076148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1077138568Ssam IEEE80211_NODE_UNLOCK(nt); 1078138568Ssam 1079148863Ssam return ni; 1080148863Ssam} 1081148863Ssam 1082148863Ssam/* 1083148863Ssam * Like ieee80211_find_rxnode but use the supplied h/w 1084148863Ssam * key index as a hint to locate the node in the key 1085148863Ssam * mapping table. If an entry is present at the key 1086148863Ssam * index we return it; otherwise do a normal lookup and 1087148863Ssam * update the mapping table if the station has a unicast 1088148863Ssam * key assigned to it. 1089148863Ssam */ 1090148863Ssamstruct ieee80211_node * 1091148863Ssam#ifdef IEEE80211_DEBUG_REFCNT 1092148863Ssamieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, 1093148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, 1094148863Ssam const char *func, int line) 1095148863Ssam#else 1096148863Ssamieee80211_find_rxnode_withkey(struct ieee80211com *ic, 1097148863Ssam const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) 1098148863Ssam#endif 1099148863Ssam{ 1100148863Ssam struct ieee80211_node_table *nt; 1101148863Ssam struct ieee80211_node *ni; 1102148863Ssam 1103170530Ssam nt = &ic->ic_sta; 1104148863Ssam IEEE80211_NODE_LOCK(nt); 1105148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) 1106148863Ssam ni = nt->nt_keyixmap[keyix]; 1107148863Ssam else 1108148863Ssam ni = NULL; 1109148863Ssam if (ni == NULL) { 1110170530Ssam if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/) 1111148863Ssam ni = _ieee80211_find_node(nt, wh->i_addr1); 1112148863Ssam else 1113148863Ssam ni = _ieee80211_find_node(nt, wh->i_addr2); 1114148863Ssam if (ni == NULL) 1115148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1116148863Ssam if (nt->nt_keyixmap != NULL) { 1117148863Ssam /* 1118148863Ssam * If the station has a unicast key cache slot 1119148863Ssam * assigned update the key->node mapping table. 1120148863Ssam */ 1121148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1122148863Ssam /* XXX can keyixmap[keyix] != NULL? */ 1123148863Ssam if (keyix < nt->nt_keyixmax && 1124148863Ssam nt->nt_keyixmap[keyix] == NULL) { 1125148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1126148863Ssam "%s: add key map entry %p<%s> refcnt %d\n", 1127148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1128148863Ssam ieee80211_node_refcnt(ni)+1); 1129148863Ssam nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); 1130148863Ssam } 1131148863Ssam } 1132170530Ssam } else 1133148863Ssam ieee80211_ref_node(ni); 1134148863Ssam IEEE80211_NODE_UNLOCK(nt); 1135148863Ssam 1136148863Ssam return ni; 1137148863Ssam} 1138170530Ssam#undef IS_BAR 1139138568Ssam#undef IS_PSPOLL 1140138568Ssam#undef IS_CTL 1141138568Ssam 1142138568Ssam/* 1143127772Ssam * Return a reference to the appropriate node for sending 1144127772Ssam * a data frame. This handles node discovery in adhoc networks. 1145127772Ssam */ 1146127772Ssamstruct ieee80211_node * 1147138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1148170530Ssamieee80211_find_txnode_debug(struct ieee80211com *ic, const uint8_t *macaddr, 1149138568Ssam const char *func, int line) 1150138568Ssam#else 1151170530Ssamieee80211_find_txnode(struct ieee80211com *ic, const uint8_t *macaddr) 1152138568Ssam#endif 1153127772Ssam{ 1154140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1155127772Ssam struct ieee80211_node *ni; 1156127772Ssam 1157127772Ssam /* 1158127772Ssam * The destination address should be in the node table 1159148863Ssam * unless this is a multicast/broadcast frame. We can 1160148863Ssam * also optimize station mode operation, all frames go 1161148863Ssam * to the bss node. 1162127772Ssam */ 1163127772Ssam /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 1164138568Ssam IEEE80211_NODE_LOCK(nt); 1165148863Ssam if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 1166148863Ssam ni = ieee80211_ref_node(ic->ic_bss); 1167158121Ssam else { 1168148863Ssam ni = _ieee80211_find_node(nt, macaddr); 1169158121Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1170158121Ssam (ni != NULL && ni->ni_associd == 0)) { 1171158121Ssam /* 1172158121Ssam * Station is not associated; don't permit the 1173158121Ssam * data frame to be sent by returning NULL. This 1174158121Ssam * is kinda a kludge but the least intrusive way 1175158121Ssam * to add this check into all drivers. 1176158121Ssam */ 1177158121Ssam ieee80211_unref_node(&ni); /* NB: null's ni */ 1178158121Ssam } 1179158121Ssam } 1180138568Ssam IEEE80211_NODE_UNLOCK(nt); 1181138568Ssam 1182138568Ssam if (ni == NULL) { 1183138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS || 1184140497Ssam ic->ic_opmode == IEEE80211_M_AHDEMO) { 1185140497Ssam /* 1186140497Ssam * In adhoc mode cons up a node for the destination. 1187140497Ssam * Note that we need an additional reference for the 1188140497Ssam * caller to be consistent with _ieee80211_find_node. 1189140497Ssam */ 1190138568Ssam ni = ieee80211_fakeup_adhoc_node(nt, macaddr); 1191140497Ssam if (ni != NULL) 1192140497Ssam (void) ieee80211_ref_node(ni); 1193140497Ssam } else { 1194138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 1195138568Ssam "[%s] no node, discard frame (%s)\n", 1196138568Ssam ether_sprintf(macaddr), __func__); 1197138568Ssam ic->ic_stats.is_tx_nonode++; 1198127772Ssam } 1199127772Ssam } 1200127772Ssam return ni; 1201127772Ssam} 1202127772Ssam 1203127772Ssam/* 1204138568Ssam * Like find but search based on the ssid too. 1205138568Ssam */ 1206138568Ssamstruct ieee80211_node * 1207138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1208138568Ssamieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt, 1209170530Ssam const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid, 1210138568Ssam const char *func, int line) 1211138568Ssam#else 1212138568Ssamieee80211_find_node_with_ssid(struct ieee80211_node_table *nt, 1213170530Ssam const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid) 1214138568Ssam#endif 1215138568Ssam{ 1216147118Ssam#define MATCH_SSID(ni, ssid, ssidlen) \ 1217147118Ssam (ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0) 1218170530Ssam static const uint8_t zeromac[IEEE80211_ADDR_LEN]; 1219138568Ssam struct ieee80211_node *ni; 1220138568Ssam int hash; 1221138568Ssam 1222138568Ssam IEEE80211_NODE_LOCK(nt); 1223147118Ssam /* 1224147118Ssam * A mac address that is all zero means match only the ssid; 1225147118Ssam * otherwise we must match both. 1226147118Ssam */ 1227147118Ssam if (IEEE80211_ADDR_EQ(macaddr, zeromac)) { 1228147118Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1229147118Ssam if (MATCH_SSID(ni, ssid, ssidlen)) 1230147118Ssam break; 1231147118Ssam } 1232147118Ssam } else { 1233147118Ssam hash = IEEE80211_NODE_HASH(macaddr); 1234147118Ssam LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { 1235147118Ssam if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && 1236147118Ssam MATCH_SSID(ni, ssid, ssidlen)) 1237147118Ssam break; 1238147118Ssam } 1239147118Ssam } 1240147118Ssam if (ni != NULL) { 1241147118Ssam ieee80211_ref_node(ni); /* mark referenced */ 1242170530Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1243159139Sdds REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr), 1244147118Ssam ieee80211_node_refcnt(ni)); 1245138568Ssam } 1246138568Ssam IEEE80211_NODE_UNLOCK(nt); 1247138568Ssam return ni; 1248147118Ssam#undef MATCH_SSID 1249138568Ssam} 1250138568Ssam 1251116742Ssamstatic void 1252138568Ssam_ieee80211_free_node(struct ieee80211_node *ni) 1253116742Ssam{ 1254138568Ssam struct ieee80211com *ic = ni->ni_ic; 1255138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1256119150Ssam 1257138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1258140766Ssam "%s %p<%s> in %s table\n", __func__, ni, 1259140766Ssam ether_sprintf(ni->ni_macaddr), 1260138568Ssam nt != NULL ? nt->nt_name : "<gone>"); 1261138568Ssam 1262138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1263138568Ssam if (nt != NULL) { 1264138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1265138568Ssam LIST_REMOVE(ni, ni_hash); 1266138568Ssam } 1267138568Ssam ic->ic_node_free(ni); 1268116742Ssam} 1269116742Ssam 1270116742Ssamvoid 1271138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1272138568Ssamieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) 1273138568Ssam#else 1274138568Ssamieee80211_free_node(struct ieee80211_node *ni) 1275138568Ssam#endif 1276116742Ssam{ 1277138568Ssam struct ieee80211_node_table *nt = ni->ni_table; 1278119150Ssam 1279138568Ssam#ifdef IEEE80211_DEBUG_REFCNT 1280140454Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1281140766Ssam "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, 1282138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); 1283138568Ssam#endif 1284148863Ssam if (nt != NULL) { 1285148863Ssam IEEE80211_NODE_LOCK(nt); 1286148863Ssam if (ieee80211_node_dectestref(ni)) { 1287148863Ssam /* 1288148863Ssam * Last reference, reclaim state. 1289148863Ssam */ 1290138568Ssam _ieee80211_free_node(ni); 1291148863Ssam } else if (ieee80211_node_refcnt(ni) == 1 && 1292148863Ssam nt->nt_keyixmap != NULL) { 1293148863Ssam ieee80211_keyix keyix; 1294148863Ssam /* 1295148863Ssam * Check for a last reference in the key mapping table. 1296148863Ssam */ 1297148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1298148863Ssam if (keyix < nt->nt_keyixmax && 1299148863Ssam nt->nt_keyixmap[keyix] == ni) { 1300148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1301148863Ssam "%s: %p<%s> clear key map entry", __func__, 1302148863Ssam ni, ether_sprintf(ni->ni_macaddr)); 1303148863Ssam nt->nt_keyixmap[keyix] = NULL; 1304148863Ssam ieee80211_node_decref(ni); /* XXX needed? */ 1305148863Ssam _ieee80211_free_node(ni); 1306148863Ssam } 1307148863Ssam } 1308148863Ssam IEEE80211_NODE_UNLOCK(nt); 1309148863Ssam } else { 1310148863Ssam if (ieee80211_node_dectestref(ni)) 1311138568Ssam _ieee80211_free_node(ni); 1312116742Ssam } 1313116742Ssam} 1314116742Ssam 1315138568Ssam/* 1316148863Ssam * Reclaim a unicast key and clear any key cache state. 1317148863Ssam */ 1318148863Ssamint 1319148863Ssamieee80211_node_delucastkey(struct ieee80211_node *ni) 1320148863Ssam{ 1321148863Ssam struct ieee80211com *ic = ni->ni_ic; 1322148863Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1323148863Ssam struct ieee80211_node *nikey; 1324148863Ssam ieee80211_keyix keyix; 1325148863Ssam int isowned, status; 1326148863Ssam 1327148863Ssam /* 1328148863Ssam * NB: We must beware of LOR here; deleting the key 1329148863Ssam * can cause the crypto layer to block traffic updates 1330148863Ssam * which can generate a LOR against the node table lock; 1331148863Ssam * grab it here and stash the key index for our use below. 1332148863Ssam * 1333148863Ssam * Must also beware of recursion on the node table lock. 1334148863Ssam * When called from node_cleanup we may already have 1335148863Ssam * the node table lock held. Unfortunately there's no 1336148863Ssam * way to separate out this path so we must do this 1337148863Ssam * conditionally. 1338148863Ssam */ 1339148863Ssam isowned = IEEE80211_NODE_IS_LOCKED(nt); 1340148863Ssam if (!isowned) 1341148863Ssam IEEE80211_NODE_LOCK(nt); 1342148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1343148863Ssam status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey); 1344148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { 1345148863Ssam nikey = nt->nt_keyixmap[keyix]; 1346148863Ssam nt->nt_keyixmap[keyix] = NULL;; 1347148863Ssam } else 1348148863Ssam nikey = NULL; 1349148863Ssam if (!isowned) 1350148863Ssam IEEE80211_NODE_UNLOCK(&ic->ic_sta); 1351148863Ssam 1352148863Ssam if (nikey != NULL) { 1353148863Ssam KASSERT(nikey == ni, 1354148863Ssam ("key map out of sync, ni %p nikey %p", ni, nikey)); 1355148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1356148863Ssam "%s: delete key map entry %p<%s> refcnt %d\n", 1357148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1358148863Ssam ieee80211_node_refcnt(ni)-1); 1359148863Ssam ieee80211_free_node(ni); 1360148863Ssam } 1361148863Ssam return status; 1362148863Ssam} 1363148863Ssam 1364148863Ssam/* 1365138568Ssam * Reclaim a node. If this is the last reference count then 1366138568Ssam * do the normal free work. Otherwise remove it from the node 1367138568Ssam * table and mark it gone by clearing the back-reference. 1368138568Ssam */ 1369138568Ssamstatic void 1370138568Ssamnode_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1371116742Ssam{ 1372148863Ssam ieee80211_keyix keyix; 1373138568Ssam 1374148863Ssam IEEE80211_NODE_LOCK_ASSERT(nt); 1375148863Ssam 1376140766Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1377140766Ssam "%s: remove %p<%s> from %s table, refcnt %d\n", 1378140766Ssam __func__, ni, ether_sprintf(ni->ni_macaddr), 1379140766Ssam nt->nt_name, ieee80211_node_refcnt(ni)-1); 1380148863Ssam /* 1381148863Ssam * Clear any entry in the unicast key mapping table. 1382148863Ssam * We need to do it here so rx lookups don't find it 1383148863Ssam * in the mapping table even if it's not in the hash 1384148863Ssam * table. We cannot depend on the mapping table entry 1385148863Ssam * being cleared because the node may not be free'd. 1386148863Ssam */ 1387148863Ssam keyix = ni->ni_ucastkey.wk_rxkeyix; 1388148863Ssam if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && 1389148863Ssam nt->nt_keyixmap[keyix] == ni) { 1390148863Ssam IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE, 1391148863Ssam "%s: %p<%s> clear key map entry\n", 1392148863Ssam __func__, ni, ether_sprintf(ni->ni_macaddr)); 1393148863Ssam nt->nt_keyixmap[keyix] = NULL; 1394148863Ssam ieee80211_node_decref(ni); /* NB: don't need free */ 1395148863Ssam } 1396138568Ssam if (!ieee80211_node_dectestref(ni)) { 1397138568Ssam /* 1398138568Ssam * Other references are present, just remove the 1399138568Ssam * node from the table so it cannot be found. When 1400138568Ssam * the references are dropped storage will be 1401140753Ssam * reclaimed. 1402138568Ssam */ 1403138568Ssam TAILQ_REMOVE(&nt->nt_node, ni, ni_list); 1404138568Ssam LIST_REMOVE(ni, ni_hash); 1405138568Ssam ni->ni_table = NULL; /* clear reference */ 1406138568Ssam } else 1407138568Ssam _ieee80211_free_node(ni); 1408138568Ssam} 1409138568Ssam 1410138568Ssamstatic void 1411138568Ssamieee80211_free_allnodes_locked(struct ieee80211_node_table *nt) 1412138568Ssam{ 1413138568Ssam struct ieee80211com *ic = nt->nt_ic; 1414116742Ssam struct ieee80211_node *ni; 1415116742Ssam 1416138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1417138568Ssam "%s: free all nodes in %s table\n", __func__, nt->nt_name); 1418138568Ssam 1419138568Ssam while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) { 1420138568Ssam if (ni->ni_associd != 0) { 1421138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1422138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1423138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1424138568Ssam } 1425138568Ssam node_reclaim(nt, ni); 1426138568Ssam } 1427116742Ssam} 1428116742Ssam 1429120483Ssam/* 1430138568Ssam * Timeout inactive stations and do related housekeeping. 1431138568Ssam * Note that we cannot hold the node lock while sending a 1432138568Ssam * frame as this would lead to a LOR. Instead we use a 1433138568Ssam * generation number to mark nodes that we've scanned and 1434138568Ssam * drop the lock and restart a scan if we have to time out 1435138568Ssam * a node. Since we are single-threaded by virtue of 1436120483Ssam * controlling the inactivity timer we can be sure this will 1437120483Ssam * process each node only once. 1438120483Ssam */ 1439138568Ssamstatic void 1440138568Ssamieee80211_timeout_stations(struct ieee80211_node_table *nt) 1441116742Ssam{ 1442138568Ssam struct ieee80211com *ic = nt->nt_ic; 1443120483Ssam struct ieee80211_node *ni; 1444138568Ssam u_int gen; 1445148320Ssam int isadhoc; 1446116742Ssam 1447148320Ssam isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS || 1448148320Ssam ic->ic_opmode == IEEE80211_M_AHDEMO); 1449138568Ssam IEEE80211_SCAN_LOCK(nt); 1450154532Ssam gen = ++nt->nt_scangen; 1451120483Ssamrestart: 1452138568Ssam IEEE80211_NODE_LOCK(nt); 1453138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1454120483Ssam if (ni->ni_scangen == gen) /* previously handled */ 1455120483Ssam continue; 1456120483Ssam ni->ni_scangen = gen; 1457138568Ssam /* 1458147788Ssam * Ignore entries for which have yet to receive an 1459147788Ssam * authentication frame. These are transient and 1460147788Ssam * will be reclaimed when the last reference to them 1461147788Ssam * goes away (when frame xmits complete). 1462147788Ssam */ 1463170530Ssam if ((ic->ic_opmode == IEEE80211_M_HOSTAP || 1464170530Ssam ic->ic_opmode == IEEE80211_M_STA) && 1465148323Ssam (ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1466147788Ssam continue; 1467147788Ssam /* 1468138568Ssam * Free fragment if not needed anymore 1469138568Ssam * (last fragment older than 1s). 1470138568Ssam * XXX doesn't belong here 1471138568Ssam */ 1472138568Ssam if (ni->ni_rxfrag[0] != NULL && 1473138568Ssam ticks > ni->ni_rxfragstamp + hz) { 1474138568Ssam m_freem(ni->ni_rxfrag[0]); 1475138568Ssam ni->ni_rxfrag[0] = NULL; 1476138568Ssam } 1477172062Ssam if (ni->ni_inact > 0) 1478172062Ssam ni->ni_inact--; 1479140498Ssam /* 1480140498Ssam * Special case ourself; we may be idle for extended periods 1481140498Ssam * of time and regardless reclaiming our state is wrong. 1482140498Ssam */ 1483140498Ssam if (ni == ic->ic_bss) 1484140498Ssam continue; 1485148320Ssam if (ni->ni_associd != 0 || isadhoc) { 1486119150Ssam /* 1487170530Ssam * Age frames on the power save queue. 1488138568Ssam */ 1489170530Ssam if (ieee80211_node_saveq_age(ni) != 0 && 1490170530Ssam IEEE80211_NODE_SAVEQ_QLEN(ni) == 0 && 1491170530Ssam ic->ic_set_tim != NULL) 1492170530Ssam ic->ic_set_tim(ni, 0); 1493138568Ssam /* 1494138568Ssam * Probe the station before time it out. We 1495138568Ssam * send a null data frame which may not be 1496138568Ssam * universally supported by drivers (need it 1497138568Ssam * for ps-poll support so it should be...). 1498170530Ssam * 1499170530Ssam * XXX don't probe the station unless we've 1500170530Ssam * received a frame from them (and have 1501170530Ssam * some idea of the rates they are capable 1502170530Ssam * of); this will get fixed more properly 1503170530Ssam * soon with better handling of the rate set. 1504138568Ssam */ 1505172062Ssam if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) && 1506172062Ssam (0 < ni->ni_inact && 1507172062Ssam ni->ni_inact <= ic->ic_inact_probe) && 1508170530Ssam ni->ni_rates.rs_nrates != 0) { 1509148320Ssam IEEE80211_NOTE(ic, 1510148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, 1511148320Ssam ni, "%s", 1512148320Ssam "probe station due to inactivity"); 1513148582Ssam /* 1514148582Ssam * Grab a reference before unlocking the table 1515148582Ssam * so the node cannot be reclaimed before we 1516148582Ssam * send the frame. ieee80211_send_nulldata 1517148582Ssam * understands we've done this and reclaims the 1518148582Ssam * ref for us as needed. 1519148582Ssam */ 1520148582Ssam ieee80211_ref_node(ni); 1521138568Ssam IEEE80211_NODE_UNLOCK(nt); 1522148301Ssam ieee80211_send_nulldata(ni); 1523138568Ssam /* XXX stat? */ 1524138568Ssam goto restart; 1525138568Ssam } 1526138568Ssam } 1527172062Ssam if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) && 1528172062Ssam ni->ni_inact <= 0) { 1529148320Ssam IEEE80211_NOTE(ic, 1530148320Ssam IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, 1531148320Ssam "station timed out due to inactivity " 1532148320Ssam "(refcnt %u)", ieee80211_node_refcnt(ni)); 1533138568Ssam /* 1534138568Ssam * Send a deauthenticate frame and drop the station. 1535138568Ssam * This is somewhat complicated due to reference counts 1536138568Ssam * and locking. At this point a station will typically 1537138568Ssam * have a reference count of 1. ieee80211_node_leave 1538138568Ssam * will do a "free" of the node which will drop the 1539138568Ssam * reference count. But in the meantime a reference 1540138568Ssam * wil be held by the deauth frame. The actual reclaim 1541138568Ssam * of the node will happen either after the tx is 1542138568Ssam * completed or by ieee80211_node_leave. 1543120483Ssam * 1544138568Ssam * Separately we must drop the node lock before sending 1545170530Ssam * in case the driver takes a lock, as this can result 1546170530Ssam * in a LOR between the node lock and the driver lock. 1547119150Ssam */ 1548138568Ssam IEEE80211_NODE_UNLOCK(nt); 1549138568Ssam if (ni->ni_associd != 0) { 1550138568Ssam IEEE80211_SEND_MGMT(ic, ni, 1551138568Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1552138568Ssam IEEE80211_REASON_AUTH_EXPIRE); 1553138568Ssam } 1554138568Ssam ieee80211_node_leave(ic, ni); 1555121180Ssam ic->ic_stats.is_node_timeout++; 1556120483Ssam goto restart; 1557120483Ssam } 1558116742Ssam } 1559138568Ssam IEEE80211_NODE_UNLOCK(nt); 1560138568Ssam 1561138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1562170530Ssam} 1563138568Ssam 1564170530Ssamvoid 1565170530Ssamieee80211_node_timeout(void *arg) 1566170530Ssam{ 1567170530Ssam struct ieee80211com *ic = arg; 1568170530Ssam 1569170530Ssam ieee80211_scan_timeout(ic); 1570170530Ssam ieee80211_timeout_stations(&ic->ic_sta); 1571170530Ssam 1572170530Ssam callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, 1573170530Ssam ieee80211_node_timeout, ic); 1574116742Ssam} 1575116742Ssam 1576116742Ssamvoid 1577138568Ssamieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) 1578116742Ssam{ 1579116742Ssam struct ieee80211_node *ni; 1580138568Ssam u_int gen; 1581116742Ssam 1582138568Ssam IEEE80211_SCAN_LOCK(nt); 1583154532Ssam gen = ++nt->nt_scangen; 1584138568Ssamrestart: 1585138568Ssam IEEE80211_NODE_LOCK(nt); 1586138568Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { 1587138568Ssam if (ni->ni_scangen != gen) { 1588138568Ssam ni->ni_scangen = gen; 1589138568Ssam (void) ieee80211_ref_node(ni); 1590138568Ssam IEEE80211_NODE_UNLOCK(nt); 1591138568Ssam (*f)(arg, ni); 1592138568Ssam ieee80211_free_node(ni); 1593138568Ssam goto restart; 1594138568Ssam } 1595138568Ssam } 1596138568Ssam IEEE80211_NODE_UNLOCK(nt); 1597138568Ssam 1598138568Ssam IEEE80211_SCAN_UNLOCK(nt); 1599116742Ssam} 1600138568Ssam 1601138568Ssamvoid 1602138568Ssamieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) 1603138568Ssam{ 1604138568Ssam printf("0x%p: mac %s refcnt %d\n", ni, 1605138568Ssam ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); 1606138568Ssam printf("\tscangen %u authmode %u flags 0x%x\n", 1607138568Ssam ni->ni_scangen, ni->ni_authmode, ni->ni_flags); 1608138568Ssam printf("\tassocid 0x%x txpower %u vlan %u\n", 1609138568Ssam ni->ni_associd, ni->ni_txpower, ni->ni_vlan); 1610138568Ssam printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", 1611167439Ssam ni->ni_txseqs[IEEE80211_NONQOS_TID], 1612167439Ssam ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, 1613167439Ssam ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, 1614138568Ssam ni->ni_rxfragstamp); 1615170530Ssam printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n", 1616170530Ssam ni->ni_rstamp, ni->ni_rssi, ni->ni_noise, 1617170530Ssam ni->ni_intval, ni->ni_capinfo); 1618138568Ssam printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", 1619138568Ssam ether_sprintf(ni->ni_bssid), 1620138568Ssam ni->ni_esslen, ni->ni_essid, 1621138568Ssam ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); 1622138568Ssam printf("\tfails %u inact %u txrate %u\n", 1623138568Ssam ni->ni_fails, ni->ni_inact, ni->ni_txrate); 1624170530Ssam printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", 1625170530Ssam ni->ni_htcap, ni->ni_htparam, 1626170530Ssam ni->ni_htctlchan, ni->ni_ht2ndchan); 1627170530Ssam printf("\thtopmode %x htstbc %x chw %u\n", 1628170530Ssam ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); 1629138568Ssam} 1630138568Ssam 1631138568Ssamvoid 1632138568Ssamieee80211_dump_nodes(struct ieee80211_node_table *nt) 1633138568Ssam{ 1634138568Ssam ieee80211_iterate_nodes(nt, 1635138568Ssam (ieee80211_iter_func *) ieee80211_dump_node, nt); 1636138568Ssam} 1637138568Ssam 1638138568Ssam/* 1639138568Ssam * Handle a station joining an 11g network. 1640138568Ssam */ 1641138568Ssamstatic void 1642138568Ssamieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1643138568Ssam{ 1644138568Ssam 1645138568Ssam /* 1646138568Ssam * Station isn't capable of short slot time. Bump 1647138568Ssam * the count of long slot time stations and disable 1648138568Ssam * use of short slot time. Note that the actual switch 1649138568Ssam * over to long slot time use may not occur until the 1650138568Ssam * next beacon transmission (per sec. 7.3.1.4 of 11g). 1651138568Ssam */ 1652138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1653138568Ssam ic->ic_longslotsta++; 1654138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1655138568Ssam "[%s] station needs long slot time, count %d\n", 1656138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1657138568Ssam /* XXX vap's w/ conflicting needs won't work */ 1658170530Ssam if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { 1659170530Ssam /* 1660170530Ssam * Don't force slot time when switched to turbo 1661170530Ssam * mode as non-ERP stations won't be present; this 1662170530Ssam * need only be done when on the normal G channel. 1663170530Ssam */ 1664170530Ssam ieee80211_set_shortslottime(ic, 0); 1665170530Ssam } 1666138568Ssam } 1667138568Ssam /* 1668138568Ssam * If the new station is not an ERP station 1669138568Ssam * then bump the counter and enable protection 1670138568Ssam * if configured. 1671138568Ssam */ 1672138568Ssam if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) { 1673138568Ssam ic->ic_nonerpsta++; 1674138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1675138568Ssam "[%s] station is !ERP, %d non-ERP stations associated\n", 1676138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1677138568Ssam /* 1678138568Ssam * If protection is configured, enable it. 1679138568Ssam */ 1680138568Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE) { 1681138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1682138568Ssam "%s: enable use of protection\n", __func__); 1683138568Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1684138568Ssam } 1685138568Ssam /* 1686138568Ssam * If station does not support short preamble 1687138568Ssam * then we must enable use of Barker preamble. 1688138568Ssam */ 1689138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { 1690138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1691138568Ssam "[%s] station needs long preamble\n", 1692138568Ssam ether_sprintf(ni->ni_macaddr)); 1693138568Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1694138568Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1695138568Ssam } 1696153973Ssam if (ic->ic_nonerpsta == 1) 1697153973Ssam ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE; 1698138568Ssam } else 1699138568Ssam ni->ni_flags |= IEEE80211_NODE_ERP; 1700138568Ssam} 1701138568Ssam 1702138568Ssamvoid 1703138568Ssamieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 1704138568Ssam{ 1705138568Ssam int newassoc; 1706138568Ssam 1707138568Ssam if (ni->ni_associd == 0) { 1708170530Ssam uint16_t aid; 1709138568Ssam 1710138568Ssam /* 1711138568Ssam * It would be good to search the bitmap 1712138568Ssam * more efficiently, but this will do for now. 1713138568Ssam */ 1714138568Ssam for (aid = 1; aid < ic->ic_max_aid; aid++) { 1715138568Ssam if (!IEEE80211_AID_ISSET(aid, 1716138568Ssam ic->ic_aid_bitmap)) 1717138568Ssam break; 1718138568Ssam } 1719138568Ssam if (aid >= ic->ic_max_aid) { 1720138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, 1721138568Ssam IEEE80211_REASON_ASSOC_TOOMANY); 1722138568Ssam ieee80211_node_leave(ic, ni); 1723138568Ssam return; 1724138568Ssam } 1725138568Ssam ni->ni_associd = aid | 0xc000; 1726138568Ssam IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 1727138568Ssam ic->ic_sta_assoc++; 1728138568Ssam newassoc = 1; 1729170530Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1730170530Ssam IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 1731138568Ssam ieee80211_node_join_11g(ic, ni); 1732138568Ssam } else 1733138568Ssam newassoc = 0; 1734138568Ssam 1735138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1736170530Ssam "[%s] station %sassociated at aid %d: %s preamble, %s slot time%s%s%s%s%s\n", 1737139523Ssam ether_sprintf(ni->ni_macaddr), newassoc ? "" : "re", 1738139523Ssam IEEE80211_NODE_AID(ni), 1739139523Ssam ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", 1740139523Ssam ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", 1741139523Ssam ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "", 1742170530Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1743170530Ssam ni->ni_flags & IEEE80211_NODE_HT ? 1744170530Ssam (ni->ni_chw == 20 ? ", HT20" : ", HT40") : "", 1745170530Ssam IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_FF) ? 1746170530Ssam ", fast-frames" : "", 1747170530Ssam IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_TURBOP) ? 1748170530Ssam ", turbo" : "" 1749139523Ssam ); 1750138568Ssam 1751138568Ssam /* give driver a chance to setup state like ni_txrate */ 1752139524Ssam if (ic->ic_newassoc != NULL) 1753148307Ssam ic->ic_newassoc(ni, newassoc); 1754138568Ssam IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 1755138568Ssam /* tell the authenticator about new station */ 1756138568Ssam if (ic->ic_auth->ia_node_join != NULL) 1757138568Ssam ic->ic_auth->ia_node_join(ic, ni); 1758138568Ssam ieee80211_notify_node_join(ic, ni, newassoc); 1759138568Ssam} 1760138568Ssam 1761138568Ssam/* 1762138568Ssam * Handle a station leaving an 11g network. 1763138568Ssam */ 1764138568Ssamstatic void 1765138568Ssamieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni) 1766138568Ssam{ 1767138568Ssam 1768170530Ssam KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), 1769170530Ssam ("not in 11g, bss %u:0x%x, curmode %u", ic->ic_bsschan->ic_freq, 1770170530Ssam ic->ic_bsschan->ic_flags, ic->ic_curmode)); 1771138568Ssam 1772138568Ssam /* 1773138568Ssam * If a long slot station do the slot time bookkeeping. 1774138568Ssam */ 1775138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { 1776138568Ssam KASSERT(ic->ic_longslotsta > 0, 1777138568Ssam ("bogus long slot station count %d", ic->ic_longslotsta)); 1778138568Ssam ic->ic_longslotsta--; 1779138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1780138568Ssam "[%s] long slot time station leaves, count now %d\n", 1781138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_longslotsta); 1782138568Ssam if (ic->ic_longslotsta == 0) { 1783138568Ssam /* 1784138568Ssam * Re-enable use of short slot time if supported 1785138568Ssam * and not operating in IBSS mode (per spec). 1786138568Ssam */ 1787138568Ssam if ((ic->ic_caps & IEEE80211_C_SHSLOT) && 1788138568Ssam ic->ic_opmode != IEEE80211_M_IBSS) { 1789138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1790138568Ssam "%s: re-enable use of short slot time\n", 1791138568Ssam __func__); 1792138568Ssam ieee80211_set_shortslottime(ic, 1); 1793138568Ssam } 1794138568Ssam } 1795138568Ssam } 1796138568Ssam /* 1797138568Ssam * If a non-ERP station do the protection-related bookkeeping. 1798138568Ssam */ 1799138568Ssam if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { 1800138568Ssam KASSERT(ic->ic_nonerpsta > 0, 1801138568Ssam ("bogus non-ERP station count %d", ic->ic_nonerpsta)); 1802138568Ssam ic->ic_nonerpsta--; 1803138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1804138568Ssam "[%s] non-ERP station leaves, count now %d\n", 1805138568Ssam ether_sprintf(ni->ni_macaddr), ic->ic_nonerpsta); 1806138568Ssam if (ic->ic_nonerpsta == 0) { 1807138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1808138568Ssam "%s: disable use of protection\n", __func__); 1809138568Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1810138568Ssam /* XXX verify mode? */ 1811138568Ssam if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { 1812138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1813138568Ssam "%s: re-enable use of short preamble\n", 1814138568Ssam __func__); 1815138568Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1816138568Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1817138568Ssam } 1818153973Ssam ic->ic_flags_ext |= IEEE80211_FEXT_ERPUPDATE; 1819138568Ssam } 1820138568Ssam } 1821138568Ssam} 1822138568Ssam 1823138568Ssam/* 1824138568Ssam * Handle bookkeeping for station deauthentication/disassociation 1825138568Ssam * when operating as an ap. 1826138568Ssam */ 1827138568Ssamvoid 1828138568Ssamieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 1829138568Ssam{ 1830140499Ssam struct ieee80211_node_table *nt = ni->ni_table; 1831138568Ssam 1832138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 1833138568Ssam "[%s] station with aid %d leaves\n", 1834138568Ssam ether_sprintf(ni->ni_macaddr), IEEE80211_NODE_AID(ni)); 1835138568Ssam 1836170530Ssam KASSERT(ic->ic_opmode != IEEE80211_M_STA, 1837138568Ssam ("unexpected operating mode %u", ic->ic_opmode)); 1838138568Ssam /* 1839138568Ssam * If node wasn't previously associated all 1840138568Ssam * we need to do is reclaim the reference. 1841138568Ssam */ 1842138568Ssam /* XXX ibss mode bypasses 11g and notification */ 1843138568Ssam if (ni->ni_associd == 0) 1844138568Ssam goto done; 1845138568Ssam /* 1846138568Ssam * Tell the authenticator the station is leaving. 1847138568Ssam * Note that we must do this before yanking the 1848138568Ssam * association id as the authenticator uses the 1849138568Ssam * associd to locate it's state block. 1850138568Ssam */ 1851138568Ssam if (ic->ic_auth->ia_node_leave != NULL) 1852138568Ssam ic->ic_auth->ia_node_leave(ic, ni); 1853138568Ssam IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 1854138568Ssam ni->ni_associd = 0; 1855138568Ssam ic->ic_sta_assoc--; 1856138568Ssam 1857170530Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 1858170530Ssam IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) 1859138568Ssam ieee80211_node_leave_11g(ic, ni); 1860138568Ssam /* 1861138568Ssam * Cleanup station state. In particular clear various 1862138568Ssam * state that might otherwise be reused if the node 1863138568Ssam * is reused before the reference count goes to zero 1864138568Ssam * (and memory is reclaimed). 1865138568Ssam */ 1866138568Ssam ieee80211_sta_leave(ic, ni); 1867138568Ssamdone: 1868140499Ssam /* 1869140499Ssam * Remove the node from any table it's recorded in and 1870140499Ssam * drop the caller's reference. Removal from the table 1871140499Ssam * is important to insure the node is not reprocessed 1872140499Ssam * for inactivity. 1873140499Ssam */ 1874140499Ssam if (nt != NULL) { 1875140499Ssam IEEE80211_NODE_LOCK(nt); 1876140499Ssam node_reclaim(nt, ni); 1877140499Ssam IEEE80211_NODE_UNLOCK(nt); 1878140499Ssam } else 1879140499Ssam ieee80211_free_node(ni); 1880138568Ssam} 1881138568Ssam 1882170530Ssamint8_t 1883138568Ssamieee80211_getrssi(struct ieee80211com *ic) 1884138568Ssam{ 1885138568Ssam#define NZ(x) ((x) == 0 ? 1 : (x)) 1886140753Ssam struct ieee80211_node_table *nt = &ic->ic_sta; 1887170530Ssam int rssi_samples; 1888170530Ssam int32_t rssi_total; 1889138568Ssam struct ieee80211_node *ni; 1890138568Ssam 1891138568Ssam rssi_total = 0; 1892138568Ssam rssi_samples = 0; 1893138568Ssam switch (ic->ic_opmode) { 1894138568Ssam case IEEE80211_M_IBSS: /* average of all ibss neighbors */ 1895138568Ssam case IEEE80211_M_AHDEMO: /* average of all neighbors */ 1896138568Ssam case IEEE80211_M_HOSTAP: /* average of all associated stations */ 1897138568Ssam /* XXX locking */ 1898140753Ssam TAILQ_FOREACH(ni, &nt->nt_node, ni_list) 1899170530Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP || 1900170530Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS)) { 1901170530Ssam int8_t rssi = ic->ic_node_getrssi(ni); 1902170530Ssam if (rssi != 0) { 1903170530Ssam rssi_samples++; 1904170530Ssam rssi_total += rssi; 1905170530Ssam } 1906138568Ssam } 1907138568Ssam break; 1908138568Ssam case IEEE80211_M_MONITOR: /* XXX */ 1909138568Ssam case IEEE80211_M_STA: /* use stats from associated ap */ 1910138568Ssam default: 1911138568Ssam if (ic->ic_bss != NULL) 1912138568Ssam rssi_total = ic->ic_node_getrssi(ic->ic_bss); 1913138568Ssam rssi_samples = 1; 1914138568Ssam break; 1915138568Ssam } 1916138568Ssam return rssi_total / NZ(rssi_samples); 1917138568Ssam#undef NZ 1918138568Ssam} 1919138568Ssam 1920170530Ssamvoid 1921170530Ssamieee80211_getsignal(struct ieee80211com *ic, int8_t *rssi, int8_t *noise) 1922138568Ssam{ 1923138568Ssam 1924170530Ssam if (ic->ic_bss == NULL) /* NB: shouldn't happen */ 1925170530Ssam return; 1926170530Ssam ic->ic_node_getsignal(ic->ic_bss, rssi, noise); 1927170530Ssam /* for non-station mode return avg'd rssi accounting */ 1928170530Ssam if (ic->ic_opmode != IEEE80211_M_STA) 1929170530Ssam *rssi = ieee80211_getrssi(ic); 1930138568Ssam} 1931138568Ssam 1932138568Ssam/* 1933138568Ssam * Node table support. 1934138568Ssam */ 1935138568Ssam 1936138568Ssamstatic void 1937138568Ssamieee80211_node_table_init(struct ieee80211com *ic, 1938138568Ssam struct ieee80211_node_table *nt, 1939170530Ssam const char *name, int inact, int keyixmax) 1940138568Ssam{ 1941138568Ssam 1942138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1943138568Ssam "%s %s table, inact %u\n", __func__, name, inact); 1944138568Ssam 1945138568Ssam nt->nt_ic = ic; 1946138568Ssam /* XXX need unit */ 1947138568Ssam IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1948138568Ssam IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname); 1949138568Ssam TAILQ_INIT(&nt->nt_node); 1950138568Ssam nt->nt_name = name; 1951138568Ssam nt->nt_scangen = 1; 1952138568Ssam nt->nt_inact_init = inact; 1953148863Ssam nt->nt_keyixmax = keyixmax; 1954148863Ssam if (nt->nt_keyixmax > 0) { 1955148863Ssam MALLOC(nt->nt_keyixmap, struct ieee80211_node **, 1956148863Ssam keyixmax * sizeof(struct ieee80211_node *), 1957148863Ssam M_80211_NODE, M_NOWAIT | M_ZERO); 1958148863Ssam if (nt->nt_keyixmap == NULL) 1959148863Ssam if_printf(ic->ic_ifp, 1960148863Ssam "Cannot allocate key index map with %u entries\n", 1961148863Ssam keyixmax); 1962148863Ssam } else 1963148863Ssam nt->nt_keyixmap = NULL; 1964138568Ssam} 1965138568Ssam 1966170530Ssamstatic void 1967138568Ssamieee80211_node_table_reset(struct ieee80211_node_table *nt) 1968138568Ssam{ 1969138568Ssam 1970138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1971138568Ssam "%s %s table\n", __func__, nt->nt_name); 1972138568Ssam 1973138568Ssam IEEE80211_NODE_LOCK(nt); 1974138568Ssam ieee80211_free_allnodes_locked(nt); 1975138568Ssam IEEE80211_NODE_UNLOCK(nt); 1976138568Ssam} 1977138568Ssam 1978138568Ssamstatic void 1979138568Ssamieee80211_node_table_cleanup(struct ieee80211_node_table *nt) 1980138568Ssam{ 1981138568Ssam 1982138568Ssam IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE, 1983138568Ssam "%s %s table\n", __func__, nt->nt_name); 1984138568Ssam 1985148863Ssam IEEE80211_NODE_LOCK(nt); 1986138568Ssam ieee80211_free_allnodes_locked(nt); 1987148863Ssam if (nt->nt_keyixmap != NULL) { 1988148863Ssam /* XXX verify all entries are NULL */ 1989148863Ssam int i; 1990148863Ssam for (i = 0; i < nt->nt_keyixmax; i++) 1991148863Ssam if (nt->nt_keyixmap[i] != NULL) 1992148863Ssam printf("%s: %s[%u] still active\n", __func__, 1993148863Ssam nt->nt_name, i); 1994148863Ssam FREE(nt->nt_keyixmap, M_80211_NODE); 1995148863Ssam nt->nt_keyixmap = NULL; 1996148863Ssam } 1997138568Ssam IEEE80211_SCAN_LOCK_DESTROY(nt); 1998138568Ssam IEEE80211_NODE_LOCK_DESTROY(nt); 1999138568Ssam} 2000