ieee80211_sta.c revision 297603
1178354Ssam/*- 2178354Ssam * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 3178354Ssam * All rights reserved. 4178354Ssam * 5178354Ssam * Redistribution and use in source and binary forms, with or without 6178354Ssam * modification, are permitted provided that the following conditions 7178354Ssam * are met: 8178354Ssam * 1. Redistributions of source code must retain the above copyright 9178354Ssam * notice, this list of conditions and the following disclaimer. 10178354Ssam * 2. Redistributions in binary form must reproduce the above copyright 11178354Ssam * notice, this list of conditions and the following disclaimer in the 12178354Ssam * documentation and/or other materials provided with the distribution. 13178354Ssam * 14178354Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15178354Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16178354Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17178354Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18178354Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19178354Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20178354Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21178354Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22178354Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23178354Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24178354Ssam */ 25178354Ssam 26178354Ssam#include <sys/cdefs.h> 27178354Ssam#ifdef __FreeBSD__ 28178354Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_sta.c 297603 2016-04-06 01:21:51Z adrian $"); 29178354Ssam#endif 30178354Ssam 31178354Ssam/* 32178354Ssam * IEEE 802.11 Station mode support. 33178354Ssam */ 34178354Ssam#include "opt_inet.h" 35178354Ssam#include "opt_wlan.h" 36178354Ssam 37178354Ssam#include <sys/param.h> 38178354Ssam#include <sys/systm.h> 39178354Ssam#include <sys/mbuf.h> 40178354Ssam#include <sys/malloc.h> 41178354Ssam#include <sys/kernel.h> 42178354Ssam 43178354Ssam#include <sys/socket.h> 44178354Ssam#include <sys/sockio.h> 45178354Ssam#include <sys/endian.h> 46178354Ssam#include <sys/errno.h> 47178354Ssam#include <sys/proc.h> 48178354Ssam#include <sys/sysctl.h> 49178354Ssam 50178354Ssam#include <net/if.h> 51178354Ssam#include <net/if_media.h> 52178354Ssam#include <net/if_llc.h> 53227339Sadrian#include <net/if_dl.h> 54227339Sadrian#include <net/if_var.h> 55178354Ssam#include <net/ethernet.h> 56178354Ssam 57178354Ssam#include <net/bpf.h> 58178354Ssam 59178354Ssam#include <net80211/ieee80211_var.h> 60178354Ssam#include <net80211/ieee80211_sta.h> 61178354Ssam#include <net80211/ieee80211_input.h> 62190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 63190391Ssam#include <net80211/ieee80211_superg.h> 64190391Ssam#endif 65211295Sbschmidt#include <net80211/ieee80211_ratectl.h> 66244060Sadrian#include <net80211/ieee80211_sta.h> 67178354Ssam 68178354Ssam#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 69178354Ssam 70178354Ssamstatic void sta_vattach(struct ieee80211vap *); 71178354Ssamstatic void sta_beacon_miss(struct ieee80211vap *); 72178354Ssamstatic int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int); 73283535Sadrianstatic int sta_input(struct ieee80211_node *, struct mbuf *, 74283535Sadrian const struct ieee80211_rx_stats *, int, int); 75178354Ssamstatic void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 76283535Sadrian int subtype, const struct ieee80211_rx_stats *, int rssi, int nf); 77191546Ssamstatic void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 78178354Ssam 79178354Ssamvoid 80178354Ssamieee80211_sta_attach(struct ieee80211com *ic) 81178354Ssam{ 82178354Ssam ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 83178354Ssam} 84178354Ssam 85178354Ssamvoid 86178354Ssamieee80211_sta_detach(struct ieee80211com *ic) 87178354Ssam{ 88178354Ssam} 89178354Ssam 90178354Ssamstatic void 91178354Ssamsta_vdetach(struct ieee80211vap *vap) 92178354Ssam{ 93178354Ssam} 94178354Ssam 95178354Ssamstatic void 96178354Ssamsta_vattach(struct ieee80211vap *vap) 97178354Ssam{ 98178354Ssam vap->iv_newstate = sta_newstate; 99178354Ssam vap->iv_input = sta_input; 100178354Ssam vap->iv_recv_mgmt = sta_recv_mgmt; 101191546Ssam vap->iv_recv_ctl = sta_recv_ctl; 102178354Ssam vap->iv_opdetach = sta_vdetach; 103178354Ssam vap->iv_bmiss = sta_beacon_miss; 104178354Ssam} 105178354Ssam 106178354Ssam/* 107178354Ssam * Handle a beacon miss event. The common code filters out 108178354Ssam * spurious events that can happen when scanning and/or before 109178354Ssam * reaching RUN state. 110178354Ssam */ 111178354Ssamstatic void 112178354Ssamsta_beacon_miss(struct ieee80211vap *vap) 113178354Ssam{ 114193439Ssam struct ieee80211com *ic = vap->iv_ic; 115178354Ssam 116225913Sadrian IEEE80211_LOCK_ASSERT(ic); 117225913Sadrian 118193439Ssam KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); 119193439Ssam KASSERT(vap->iv_state >= IEEE80211_S_RUN, 120193439Ssam ("wrong state %s", ieee80211_state_name[vap->iv_state])); 121178354Ssam 122193439Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 123193439Ssam "beacon miss, mode %s state %s\n", 124193439Ssam ieee80211_opmode_name[vap->iv_opmode], 125193439Ssam ieee80211_state_name[vap->iv_state]); 126193439Ssam 127193439Ssam if (vap->iv_state == IEEE80211_S_CSA) { 128193439Ssam /* 129193439Ssam * A Channel Switch is pending; assume we missed the 130193439Ssam * beacon that would've completed the process and just 131193439Ssam * force the switch. If we made a mistake we'll not 132193439Ssam * find the AP on the new channel and fall back to a 133193439Ssam * normal scan. 134193439Ssam */ 135193439Ssam ieee80211_csa_completeswitch(ic); 136193439Ssam return; 137193439Ssam } 138178354Ssam if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { 139178354Ssam /* 140178354Ssam * Send a directed probe req before falling back to a 141178354Ssam * scan; if we receive a response ic_bmiss_count will 142178354Ssam * be reset. Some cards mistakenly report beacon miss 143178354Ssam * so this avoids the expensive scan if the ap is 144178354Ssam * still there. 145178354Ssam */ 146178354Ssam ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, 147178354Ssam vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, 148178354Ssam vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); 149178354Ssam return; 150178354Ssam } 151205140Sweongyo 152205140Sweongyo callout_stop(&vap->iv_swbmiss); 153178354Ssam vap->iv_bmiss_count = 0; 154178354Ssam vap->iv_stats.is_beacon_miss++; 155178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 156190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 157190402Ssam struct ieee80211com *ic = vap->iv_ic; 158190402Ssam 159178354Ssam /* 160178354Ssam * If we receive a beacon miss interrupt when using 161178354Ssam * dynamic turbo, attempt to switch modes before 162178354Ssam * reassociating. 163178354Ssam */ 164178354Ssam if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) 165178354Ssam ieee80211_dturbo_switch(vap, 166178354Ssam ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); 167190391Ssam#endif 168178354Ssam /* 169178354Ssam * Try to reassociate before scanning for a new ap. 170178354Ssam */ 171178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 172178354Ssam } else { 173178354Ssam /* 174178354Ssam * Somebody else is controlling state changes (e.g. 175178354Ssam * a user-mode app) don't do anything that would 176178354Ssam * confuse them; just drop into scan mode so they'll 177178354Ssam * notified of the state change and given control. 178178354Ssam */ 179178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); 180178354Ssam } 181178354Ssam} 182178354Ssam 183178354Ssam/* 184178354Ssam * Handle deauth with reason. We retry only for 185178354Ssam * the cases where we might succeed. Otherwise 186178354Ssam * we downgrade the ap and scan. 187178354Ssam */ 188178354Ssamstatic void 189178354Ssamsta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) 190178354Ssam{ 191178354Ssam switch (reason) { 192178354Ssam case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ 193178354Ssam case IEEE80211_STATUS_TIMEOUT: 194178354Ssam case IEEE80211_REASON_ASSOC_EXPIRE: 195178354Ssam case IEEE80211_REASON_NOT_AUTHED: 196178354Ssam case IEEE80211_REASON_NOT_ASSOCED: 197178354Ssam case IEEE80211_REASON_ASSOC_LEAVE: 198178354Ssam case IEEE80211_REASON_ASSOC_NOT_AUTHED: 199178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); 200178354Ssam break; 201178354Ssam default: 202178354Ssam ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); 203178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 204178354Ssam ieee80211_check_scan_current(vap); 205178354Ssam break; 206178354Ssam } 207178354Ssam} 208178354Ssam 209297164Savosstatic void 210297164Savossta_swbmiss_start(struct ieee80211vap *vap) 211297164Savos{ 212297164Savos 213297164Savos if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) { 214297164Savos /* 215297164Savos * Start s/w beacon miss timer for devices w/o 216297164Savos * hardware support. We fudge a bit here since 217297164Savos * we're doing this in software. 218297164Savos */ 219297164Savos vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 220297164Savos 2 * vap->iv_bmissthreshold * vap->iv_bss->ni_intval); 221297164Savos vap->iv_swbmiss_count = 0; 222297164Savos callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 223297164Savos ieee80211_swbmiss, vap); 224297164Savos } 225297164Savos} 226297164Savos 227178354Ssam/* 228178354Ssam * IEEE80211_M_STA vap state machine handler. 229178354Ssam * This routine handles the main states in the 802.11 protocol. 230178354Ssam */ 231178354Ssamstatic int 232178354Ssamsta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 233178354Ssam{ 234178354Ssam struct ieee80211com *ic = vap->iv_ic; 235178354Ssam struct ieee80211_node *ni; 236178354Ssam enum ieee80211_state ostate; 237178354Ssam 238178354Ssam IEEE80211_LOCK_ASSERT(ic); 239178354Ssam 240178354Ssam ostate = vap->iv_state; 241178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 242178354Ssam __func__, ieee80211_state_name[ostate], 243178354Ssam ieee80211_state_name[nstate], arg); 244178354Ssam vap->iv_state = nstate; /* state transition */ 245178354Ssam callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 246178354Ssam if (ostate != IEEE80211_S_SCAN) 247178354Ssam ieee80211_cancel_scan(vap); /* background scan */ 248178354Ssam ni = vap->iv_bss; /* NB: no reference held */ 249178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 250178354Ssam callout_stop(&vap->iv_swbmiss); 251178354Ssam switch (nstate) { 252178354Ssam case IEEE80211_S_INIT: 253178354Ssam switch (ostate) { 254178354Ssam case IEEE80211_S_SLEEP: 255178354Ssam /* XXX wakeup */ 256264855Sadrian /* XXX driver hook to wakeup the hardware? */ 257178354Ssam case IEEE80211_S_RUN: 258178354Ssam IEEE80211_SEND_MGMT(ni, 259178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 260178354Ssam IEEE80211_REASON_ASSOC_LEAVE); 261178354Ssam ieee80211_sta_leave(ni); 262178354Ssam break; 263178354Ssam case IEEE80211_S_ASSOC: 264178354Ssam IEEE80211_SEND_MGMT(ni, 265178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 266178354Ssam IEEE80211_REASON_AUTH_LEAVE); 267178354Ssam break; 268178354Ssam case IEEE80211_S_SCAN: 269178354Ssam ieee80211_cancel_scan(vap); 270178354Ssam break; 271178354Ssam default: 272296355Savos break; 273178354Ssam } 274178354Ssam if (ostate != IEEE80211_S_INIT) { 275178354Ssam /* NB: optimize INIT -> INIT case */ 276178354Ssam ieee80211_reset_bss(vap); 277178354Ssam } 278178354Ssam if (vap->iv_auth->ia_detach != NULL) 279178354Ssam vap->iv_auth->ia_detach(vap); 280178354Ssam break; 281178354Ssam case IEEE80211_S_SCAN: 282178354Ssam switch (ostate) { 283178354Ssam case IEEE80211_S_INIT: 284178354Ssam /* 285178354Ssam * Initiate a scan. We can come here as a result 286178354Ssam * of an IEEE80211_IOC_SCAN_REQ too in which case 287178354Ssam * the vap will be marked with IEEE80211_FEXT_SCANREQ 288178354Ssam * and the scan request parameters will be present 289178354Ssam * in iv_scanreq. Otherwise we do the default. 290178354Ssam */ 291178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 292178354Ssam ieee80211_check_scan(vap, 293178354Ssam vap->iv_scanreq_flags, 294178354Ssam vap->iv_scanreq_duration, 295178354Ssam vap->iv_scanreq_mindwell, 296178354Ssam vap->iv_scanreq_maxdwell, 297178354Ssam vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 298178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 299178354Ssam } else 300178354Ssam ieee80211_check_scan_current(vap); 301178354Ssam break; 302178354Ssam case IEEE80211_S_SCAN: 303178354Ssam case IEEE80211_S_AUTH: 304178354Ssam case IEEE80211_S_ASSOC: 305178354Ssam /* 306178354Ssam * These can happen either because of a timeout 307178354Ssam * on an assoc/auth response or because of a 308178354Ssam * change in state that requires a reset. For 309178354Ssam * the former we're called with a non-zero arg 310178354Ssam * that is the cause for the failure; pass this 311178354Ssam * to the scan code so it can update state. 312178354Ssam * Otherwise trigger a new scan unless we're in 313178354Ssam * manual roaming mode in which case an application 314178354Ssam * must issue an explicit scan request. 315178354Ssam */ 316178354Ssam if (arg != 0) 317178354Ssam ieee80211_scan_assoc_fail(vap, 318178354Ssam vap->iv_bss->ni_macaddr, arg); 319178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 320178354Ssam ieee80211_check_scan_current(vap); 321178354Ssam break; 322264906Sadrian case IEEE80211_S_SLEEP: /* beacon miss */ 323264906Sadrian /* 324264906Sadrian * XXX if in sleep we need to wakeup the hardware. 325264906Sadrian */ 326264906Sadrian /* FALLTHROUGH */ 327178354Ssam case IEEE80211_S_RUN: /* beacon miss */ 328178354Ssam /* 329178354Ssam * Beacon miss. Notify user space and if not 330178354Ssam * under control of a user application (roaming 331178354Ssam * manual) kick off a scan to re-connect. 332178354Ssam */ 333264906Sadrian 334178354Ssam ieee80211_sta_leave(ni); 335178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 336178354Ssam ieee80211_check_scan_current(vap); 337178354Ssam break; 338178354Ssam default: 339178354Ssam goto invalid; 340178354Ssam } 341178354Ssam break; 342178354Ssam case IEEE80211_S_AUTH: 343178354Ssam switch (ostate) { 344178354Ssam case IEEE80211_S_INIT: 345178354Ssam case IEEE80211_S_SCAN: 346178354Ssam IEEE80211_SEND_MGMT(ni, 347178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1); 348178354Ssam break; 349178354Ssam case IEEE80211_S_AUTH: 350178354Ssam case IEEE80211_S_ASSOC: 351178354Ssam switch (arg & 0xff) { 352178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 353178354Ssam /* ??? */ 354178354Ssam IEEE80211_SEND_MGMT(ni, 355178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 2); 356178354Ssam break; 357178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 358178354Ssam sta_authretry(vap, ni, arg>>8); 359178354Ssam break; 360178354Ssam } 361178354Ssam break; 362297162Savos case IEEE80211_S_SLEEP: 363178354Ssam case IEEE80211_S_RUN: 364178354Ssam switch (arg & 0xff) { 365178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 366178354Ssam IEEE80211_SEND_MGMT(ni, 367178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 2); 368297162Savos vap->iv_state = IEEE80211_S_RUN; /* stay RUN */ 369178354Ssam break; 370178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 371178354Ssam ieee80211_sta_leave(ni); 372178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 373178354Ssam /* try to reauth */ 374178354Ssam IEEE80211_SEND_MGMT(ni, 375178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1); 376178354Ssam } 377178354Ssam break; 378178354Ssam } 379178354Ssam break; 380178354Ssam default: 381178354Ssam goto invalid; 382178354Ssam } 383178354Ssam break; 384178354Ssam case IEEE80211_S_ASSOC: 385178354Ssam switch (ostate) { 386178354Ssam case IEEE80211_S_AUTH: 387178354Ssam case IEEE80211_S_ASSOC: 388178354Ssam IEEE80211_SEND_MGMT(ni, 389178354Ssam IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 390178354Ssam break; 391178354Ssam case IEEE80211_S_SLEEP: /* cannot happen */ 392178354Ssam case IEEE80211_S_RUN: 393178354Ssam ieee80211_sta_leave(ni); 394178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 395178354Ssam IEEE80211_SEND_MGMT(ni, arg ? 396178354Ssam IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 397178354Ssam IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 398178354Ssam } 399178354Ssam break; 400178354Ssam default: 401178354Ssam goto invalid; 402178354Ssam } 403178354Ssam break; 404178354Ssam case IEEE80211_S_RUN: 405178354Ssam if (vap->iv_flags & IEEE80211_F_WPA) { 406178354Ssam /* XXX validate prerequisites */ 407178354Ssam } 408178354Ssam switch (ostate) { 409178354Ssam case IEEE80211_S_RUN: 410193439Ssam case IEEE80211_S_CSA: 411178354Ssam break; 412178354Ssam case IEEE80211_S_AUTH: /* when join is done in fw */ 413178354Ssam case IEEE80211_S_ASSOC: 414178354Ssam#ifdef IEEE80211_DEBUG 415178354Ssam if (ieee80211_msg_debug(vap)) { 416178354Ssam ieee80211_note(vap, "%s with %s ssid ", 417178354Ssam (vap->iv_opmode == IEEE80211_M_STA ? 418178354Ssam "associated" : "synchronized"), 419178354Ssam ether_sprintf(ni->ni_bssid)); 420178354Ssam ieee80211_print_essid(vap->iv_bss->ni_essid, 421178354Ssam ni->ni_esslen); 422178354Ssam /* XXX MCS/HT */ 423178354Ssam printf(" channel %d start %uMb\n", 424178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 425178354Ssam IEEE80211_RATE2MBS(ni->ni_txrate)); 426178354Ssam } 427178354Ssam#endif 428178354Ssam ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 429178354Ssam ieee80211_notify_node_join(ni, 430178354Ssam arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 431178354Ssam break; 432178354Ssam case IEEE80211_S_SLEEP: 433264855Sadrian /* Wake up from sleep */ 434241138Sadrian vap->iv_sta_ps(vap, 0); 435178354Ssam break; 436178354Ssam default: 437178354Ssam goto invalid; 438178354Ssam } 439178354Ssam ieee80211_sync_curchan(ic); 440297164Savos if (ostate != IEEE80211_S_RUN) 441297164Savos sta_swbmiss_start(vap); 442178354Ssam /* 443178354Ssam * When 802.1x is not in use mark the port authorized 444178354Ssam * at this point so traffic can flow. 445178354Ssam */ 446178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 447178354Ssam ieee80211_node_authorize(ni); 448184345Ssam /* 449184345Ssam * Fake association when joining an existing bss. 450264855Sadrian * 451264855Sadrian * Don't do this if we're doing SLEEP->RUN. 452184345Ssam */ 453264855Sadrian if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP) 454264855Sadrian ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN)); 455178354Ssam break; 456193439Ssam case IEEE80211_S_CSA: 457193439Ssam if (ostate != IEEE80211_S_RUN) 458193439Ssam goto invalid; 459193439Ssam break; 460178354Ssam case IEEE80211_S_SLEEP: 461297164Savos sta_swbmiss_start(vap); 462241138Sadrian vap->iv_sta_ps(vap, 1); 463178354Ssam break; 464178354Ssam default: 465178354Ssam invalid: 466184268Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 467184268Ssam "%s: unexpected state transition %s -> %s\n", __func__, 468178354Ssam ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 469178354Ssam break; 470178354Ssam } 471178354Ssam return 0; 472178354Ssam} 473178354Ssam 474178354Ssam/* 475178354Ssam * Return non-zero if the frame is an echo of a multicast 476178354Ssam * frame sent by ourself. The dir is known to be DSTODS. 477178354Ssam */ 478178354Ssamstatic __inline int 479178354Ssamisdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 480178354Ssam{ 481178354Ssam#define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 482178354Ssam#define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 483178354Ssam const uint8_t *sa; 484178354Ssam 485178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 486178354Ssam 487178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 488178354Ssam return 0; 489178354Ssam sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 490178354Ssam return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 491178354Ssam#undef WH4 492178354Ssam#undef QWH4 493178354Ssam} 494178354Ssam 495178354Ssam/* 496178354Ssam * Return non-zero if the frame is an echo of a multicast 497178354Ssam * frame sent by ourself. The dir is known to be FROMDS. 498178354Ssam */ 499178354Ssamstatic __inline int 500178354Ssamisfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 501178354Ssam{ 502178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 503178354Ssam 504178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 505178354Ssam return 0; 506178354Ssam return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 507178354Ssam} 508178354Ssam 509178354Ssam/* 510178354Ssam * Decide if a received management frame should be 511178354Ssam * printed when debugging is enabled. This filters some 512178354Ssam * of the less interesting frames that come frequently 513178354Ssam * (e.g. beacons). 514178354Ssam */ 515178354Ssamstatic __inline int 516178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 517178354Ssam{ 518178354Ssam switch (subtype) { 519178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 520178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 521178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 522178354Ssam return 0; 523178354Ssam } 524178354Ssam return 1; 525178354Ssam} 526178354Ssam 527178354Ssam/* 528178354Ssam * Process a received frame. The node associated with the sender 529178354Ssam * should be supplied. If nothing was found in the node table then 530178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 531178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 532178354Ssam * during AP scanning to select a AP to associate with; it can have 533178354Ssam * any units so long as values have consistent units and higher values 534178354Ssam * mean ``better signal''. The receive timestamp is currently not used 535178354Ssam * by the 802.11 layer. 536178354Ssam */ 537178354Ssamstatic int 538283535Sadriansta_input(struct ieee80211_node *ni, struct mbuf *m, 539283535Sadrian const struct ieee80211_rx_stats *rxs, int rssi, int nf) 540178354Ssam{ 541178354Ssam struct ieee80211vap *vap = ni->ni_vap; 542178354Ssam struct ieee80211com *ic = ni->ni_ic; 543178354Ssam struct ifnet *ifp = vap->iv_ifp; 544178354Ssam struct ieee80211_frame *wh; 545178354Ssam struct ieee80211_key *key; 546178354Ssam struct ether_header *eh; 547203422Srpaulo int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 548178354Ssam uint8_t dir, type, subtype, qos; 549178354Ssam uint8_t *bssid; 550178354Ssam 551183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 552178354Ssam /* 553178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 554183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 555183247Ssam * here but were received out of order and been held on 556183247Ssam * the reorder queue. When resubmitted they are marked 557183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 558183247Ssam * the normal processing. 559178354Ssam */ 560178354Ssam wh = mtod(m, struct ieee80211_frame *); 561178354Ssam type = IEEE80211_FC0_TYPE_DATA; 562178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 563178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 564178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 565178354Ssam goto resubmit_ampdu; 566178354Ssam } 567178354Ssam 568178354Ssam KASSERT(ni != NULL, ("null node")); 569178354Ssam ni->ni_inact = ni->ni_inact_reload; 570178354Ssam 571178354Ssam type = -1; /* undefined */ 572178354Ssam 573178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 574178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 575178354Ssam ni->ni_macaddr, NULL, 576178354Ssam "too short (1): len %u", m->m_pkthdr.len); 577178354Ssam vap->iv_stats.is_rx_tooshort++; 578178354Ssam goto out; 579178354Ssam } 580178354Ssam /* 581178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 582178354Ssam * frame format but don't reference fields past outside 583178354Ssam * ieee80211_frame_min w/o first validating the data is 584178354Ssam * present. 585178354Ssam */ 586178354Ssam wh = mtod(m, struct ieee80211_frame *); 587178354Ssam 588178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 589178354Ssam IEEE80211_FC0_VERSION_0) { 590178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 591191547Ssam ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 592191547Ssam wh->i_fc[0], wh->i_fc[1]); 593178354Ssam vap->iv_stats.is_rx_badversion++; 594178354Ssam goto err; 595178354Ssam } 596178354Ssam 597178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 598178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 599178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 600178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 601178354Ssam bssid = wh->i_addr2; 602178354Ssam if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 603178354Ssam /* not interested in */ 604178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 605178354Ssam bssid, NULL, "%s", "not to bss"); 606178354Ssam vap->iv_stats.is_rx_wrongbss++; 607178354Ssam goto out; 608178354Ssam } 609227338Sadrian 610227338Sadrian /* 611227338Sadrian * Some devices may be in a promiscuous mode 612227338Sadrian * where they receive frames for multiple station 613227338Sadrian * addresses. 614227338Sadrian * 615227338Sadrian * If we receive a data frame that isn't 616227338Sadrian * destined to our VAP MAC, drop it. 617227338Sadrian * 618227338Sadrian * XXX TODO: This is only enforced when not scanning; 619227338Sadrian * XXX it assumes a software-driven scan will put the NIC 620227338Sadrian * XXX into a "no data frames" mode before setting this 621227338Sadrian * XXX flag. Otherwise it may be possible that we'll still 622227338Sadrian * XXX process data frames whilst scanning. 623227338Sadrian */ 624227338Sadrian if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 625227338Sadrian && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 626227338Sadrian IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 627227338Sadrian bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 628227338Sadrian IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 629227338Sadrian vap->iv_stats.is_rx_wrongbss++; 630227338Sadrian goto out; 631227338Sadrian } 632227338Sadrian 633178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 634192468Ssam ni->ni_noise = nf; 635282820Sadrian if ( IEEE80211_HAS_SEQ(type, subtype) && 636282820Sadrian !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 637178354Ssam uint8_t tid = ieee80211_gettid(wh); 638178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 639178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 640178354Ssam ic->ic_wme.wme_hipri_traffic++; 641296254Savos if (! ieee80211_check_rxseq(ni, wh, bssid)) 642178354Ssam goto out; 643178354Ssam } 644178354Ssam } 645178354Ssam 646178354Ssam switch (type) { 647178354Ssam case IEEE80211_FC0_TYPE_DATA: 648178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 649178354Ssam if (m->m_len < hdrspace && 650178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 651178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 652178354Ssam ni->ni_macaddr, NULL, 653178354Ssam "data too short: expecting %u", hdrspace); 654178354Ssam vap->iv_stats.is_rx_tooshort++; 655178354Ssam goto out; /* XXX */ 656178354Ssam } 657178354Ssam /* 658183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 659183247Ssam * processed directly then ieee80211_ampdu_reorder 660178354Ssam * will return 0; otherwise it has consumed the mbuf 661178354Ssam * and we should do nothing more with it. 662178354Ssam */ 663183247Ssam if ((m->m_flags & M_AMPDU) && 664178354Ssam (dir == IEEE80211_FC1_DIR_FROMDS || 665178354Ssam dir == IEEE80211_FC1_DIR_DSTODS) && 666178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 667178354Ssam m = NULL; 668178354Ssam goto out; 669178354Ssam } 670178354Ssam resubmit_ampdu: 671178354Ssam if (dir == IEEE80211_FC1_DIR_FROMDS) { 672178354Ssam if ((ifp->if_flags & IFF_SIMPLEX) && 673178354Ssam isfromds_mcastecho(vap, wh)) { 674178354Ssam /* 675178354Ssam * In IEEE802.11 network, multicast 676178354Ssam * packets sent from "me" are broadcast 677178354Ssam * from the AP; silently discard for 678178354Ssam * SIMPLEX interface. 679178354Ssam */ 680178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 681178354Ssam wh, "data", "%s", "multicast echo"); 682178354Ssam vap->iv_stats.is_rx_mcastecho++; 683178354Ssam goto out; 684178354Ssam } 685178354Ssam if ((vap->iv_flags & IEEE80211_F_DWDS) && 686178354Ssam IEEE80211_IS_MULTICAST(wh->i_addr1)) { 687178354Ssam /* 688178354Ssam * DWDS sta's must drop 3-address mcast frames 689178354Ssam * as they will be sent separately as a 4-addr 690178354Ssam * frame. Accepting the 3-addr frame will 691178354Ssam * confuse the bridge into thinking the sending 692178354Ssam * sta is located at the end of WDS link. 693178354Ssam */ 694178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 695178354Ssam "3-address data", "%s", "DWDS enabled"); 696178354Ssam vap->iv_stats.is_rx_mcastecho++; 697178354Ssam goto out; 698178354Ssam } 699178354Ssam } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 700178354Ssam if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 701178354Ssam IEEE80211_DISCARD(vap, 702178354Ssam IEEE80211_MSG_INPUT, wh, "4-address data", 703178354Ssam "%s", "DWDS not enabled"); 704178354Ssam vap->iv_stats.is_rx_wrongdir++; 705178354Ssam goto out; 706178354Ssam } 707178354Ssam if ((ifp->if_flags & IFF_SIMPLEX) && 708178354Ssam isdstods_mcastecho(vap, wh)) { 709178354Ssam /* 710178354Ssam * In IEEE802.11 network, multicast 711178354Ssam * packets sent from "me" are broadcast 712178354Ssam * from the AP; silently discard for 713178354Ssam * SIMPLEX interface. 714178354Ssam */ 715178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 716178354Ssam "4-address data", "%s", "multicast echo"); 717178354Ssam vap->iv_stats.is_rx_mcastecho++; 718178354Ssam goto out; 719178354Ssam } 720178354Ssam } else { 721178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 722178354Ssam "data", "incorrect dir 0x%x", dir); 723178354Ssam vap->iv_stats.is_rx_wrongdir++; 724178354Ssam goto out; 725178354Ssam } 726178354Ssam 727178354Ssam /* 728178354Ssam * Handle privacy requirements. Note that we 729178354Ssam * must not be preempted from here until after 730178354Ssam * we (potentially) call ieee80211_crypto_demic; 731178354Ssam * otherwise we may violate assumptions in the 732178354Ssam * crypto cipher modules used to do delayed update 733178354Ssam * of replay sequence numbers. 734178354Ssam */ 735260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 736178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 737178354Ssam /* 738178354Ssam * Discard encrypted frames when privacy is off. 739178354Ssam */ 740178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 741178354Ssam wh, "WEP", "%s", "PRIVACY off"); 742178354Ssam vap->iv_stats.is_rx_noprivacy++; 743178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 744178354Ssam goto out; 745178354Ssam } 746178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 747178354Ssam if (key == NULL) { 748178354Ssam /* NB: stats+msgs handled in crypto_decap */ 749178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 750178354Ssam goto out; 751178354Ssam } 752178354Ssam wh = mtod(m, struct ieee80211_frame *); 753260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 754178354Ssam } else { 755178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 756178354Ssam key = NULL; 757178354Ssam } 758178354Ssam 759178354Ssam /* 760178354Ssam * Save QoS bits for use below--before we strip the header. 761178354Ssam */ 762178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 763178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 764178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 765178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 766178354Ssam } else 767178354Ssam qos = 0; 768178354Ssam 769178354Ssam /* 770178354Ssam * Next up, any fragmentation. 771178354Ssam */ 772178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 773178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 774178354Ssam if (m == NULL) { 775178354Ssam /* Fragment dropped or frame not complete yet */ 776178354Ssam goto out; 777178354Ssam } 778178354Ssam } 779178354Ssam wh = NULL; /* no longer valid, catch any uses */ 780178354Ssam 781178354Ssam /* 782178354Ssam * Next strip any MSDU crypto bits. 783178354Ssam */ 784178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 785178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 786178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 787178354Ssam vap->iv_stats.is_rx_demicfail++; 788178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 789178354Ssam goto out; 790178354Ssam } 791178354Ssam 792178354Ssam /* copy to listener after decrypt */ 793192468Ssam if (ieee80211_radiotap_active_vap(vap)) 794202967Srpaulo ieee80211_radiotap_rx(vap, m); 795178354Ssam need_tap = 0; 796178354Ssam 797178354Ssam /* 798178354Ssam * Finally, strip the 802.11 header. 799178354Ssam */ 800178354Ssam m = ieee80211_decap(vap, m, hdrspace); 801178354Ssam if (m == NULL) { 802178354Ssam /* XXX mask bit to check for both */ 803178354Ssam /* don't count Null data frames as errors */ 804178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 805178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 806178354Ssam goto out; 807178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 808178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 809178354Ssam vap->iv_stats.is_rx_decap++; 810178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 811178354Ssam goto err; 812178354Ssam } 813178354Ssam eh = mtod(m, struct ether_header *); 814178354Ssam if (!ieee80211_node_is_authorized(ni)) { 815178354Ssam /* 816178354Ssam * Deny any non-PAE frames received prior to 817178354Ssam * authorization. For open/shared-key 818178354Ssam * authentication the port is mark authorized 819178354Ssam * after authentication completes. For 802.1x 820178354Ssam * the port is not marked authorized by the 821178354Ssam * authenticator until the handshake has completed. 822178354Ssam */ 823178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 824178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 825178354Ssam eh->ether_shost, "data", 826178354Ssam "unauthorized port: ether type 0x%x len %u", 827178354Ssam eh->ether_type, m->m_pkthdr.len); 828178354Ssam vap->iv_stats.is_rx_unauth++; 829178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 830178354Ssam goto err; 831178354Ssam } 832178354Ssam } else { 833178354Ssam /* 834178354Ssam * When denying unencrypted frames, discard 835178354Ssam * any non-PAE frames received without encryption. 836178354Ssam */ 837178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 838178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 839178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 840178354Ssam /* 841178354Ssam * Drop unencrypted frames. 842178354Ssam */ 843178354Ssam vap->iv_stats.is_rx_unencrypted++; 844178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 845178354Ssam goto out; 846178354Ssam } 847178354Ssam } 848178354Ssam /* XXX require HT? */ 849178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 850178354Ssam m = ieee80211_decap_amsdu(ni, m); 851178354Ssam if (m == NULL) 852178354Ssam return IEEE80211_FC0_TYPE_DATA; 853190391Ssam } else { 854190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 855190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 856190391Ssam if (m == NULL) 857178354Ssam return IEEE80211_FC0_TYPE_DATA; 858190391Ssam#endif 859178354Ssam } 860178354Ssam ieee80211_deliver_data(vap, ni, m); 861178354Ssam return IEEE80211_FC0_TYPE_DATA; 862178354Ssam 863178354Ssam case IEEE80211_FC0_TYPE_MGT: 864178354Ssam vap->iv_stats.is_rx_mgmt++; 865178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 866178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 867178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 868178354Ssam wh, "data", "incorrect dir 0x%x", dir); 869178354Ssam vap->iv_stats.is_rx_wrongdir++; 870178354Ssam goto err; 871178354Ssam } 872178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 873178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 874178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 875178354Ssam m->m_pkthdr.len); 876178354Ssam vap->iv_stats.is_rx_tooshort++; 877178354Ssam goto out; 878178354Ssam } 879178354Ssam#ifdef IEEE80211_DEBUG 880178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 881178354Ssam ieee80211_msg_dumppkts(vap)) { 882178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 883178354Ssam ieee80211_mgt_subtype_name[subtype >> 884178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 885178354Ssam ether_sprintf(wh->i_addr2), rssi); 886178354Ssam } 887178354Ssam#endif 888260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 889178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 890178354Ssam /* 891178354Ssam * Only shared key auth frames with a challenge 892178354Ssam * should be encrypted, discard all others. 893178354Ssam */ 894178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 895178354Ssam wh, ieee80211_mgt_subtype_name[subtype >> 896178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 897178354Ssam "%s", "WEP set but not permitted"); 898178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 899178354Ssam goto out; 900178354Ssam } 901178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 902178354Ssam /* 903178354Ssam * Discard encrypted frames when privacy is off. 904178354Ssam */ 905178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 906178354Ssam wh, "mgt", "%s", "WEP set but PRIVACY off"); 907178354Ssam vap->iv_stats.is_rx_noprivacy++; 908178354Ssam goto out; 909178354Ssam } 910178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 911178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 912178354Ssam if (key == NULL) { 913178354Ssam /* NB: stats+msgs handled in crypto_decap */ 914178354Ssam goto out; 915178354Ssam } 916178354Ssam wh = mtod(m, struct ieee80211_frame *); 917260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 918178354Ssam } 919283535Sadrian vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 920191534Ssam goto out; 921178354Ssam 922178354Ssam case IEEE80211_FC0_TYPE_CTL: 923178354Ssam vap->iv_stats.is_rx_ctl++; 924178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 925191546Ssam vap->iv_recv_ctl(ni, m, subtype); 926178354Ssam goto out; 927191549Ssam 928178354Ssam default: 929178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 930178354Ssam wh, NULL, "bad frame type 0x%x", type); 931178354Ssam /* should not come here */ 932178354Ssam break; 933178354Ssam } 934178354Ssamerr: 935271861Sglebius if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 936178354Ssamout: 937178354Ssam if (m != NULL) { 938192765Ssam if (need_tap && ieee80211_radiotap_active_vap(vap)) 939192468Ssam ieee80211_radiotap_rx(vap, m); 940178354Ssam m_freem(m); 941178354Ssam } 942178354Ssam return type; 943178354Ssam} 944178354Ssam 945178354Ssamstatic void 946178354Ssamsta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 947192468Ssam int rssi, int nf, uint16_t seq, uint16_t status) 948178354Ssam{ 949178354Ssam struct ieee80211vap *vap = ni->ni_vap; 950178354Ssam 951178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 952178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 953178354Ssam ni->ni_macaddr, "open auth", 954178354Ssam "bad sta auth mode %u", ni->ni_authmode); 955178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 956178354Ssam return; 957178354Ssam } 958178354Ssam if (vap->iv_state != IEEE80211_S_AUTH || 959178354Ssam seq != IEEE80211_AUTH_OPEN_RESPONSE) { 960178354Ssam vap->iv_stats.is_rx_bad_auth++; 961178354Ssam return; 962178354Ssam } 963178354Ssam if (status != 0) { 964178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 965178354Ssam ni, "open auth failed (reason %d)", status); 966178354Ssam vap->iv_stats.is_rx_auth_fail++; 967178354Ssam vap->iv_stats.is_rx_authfail_code = status; 968178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 969178354Ssam IEEE80211_SCAN_FAIL_STATUS); 970178354Ssam } else 971178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 972178354Ssam} 973178354Ssam 974178354Ssamstatic void 975178354Ssamsta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 976192468Ssam uint8_t *frm, uint8_t *efrm, int rssi, int nf, 977178354Ssam uint16_t seq, uint16_t status) 978178354Ssam{ 979178354Ssam struct ieee80211vap *vap = ni->ni_vap; 980178354Ssam uint8_t *challenge; 981178354Ssam int estatus; 982178354Ssam 983178354Ssam /* 984178354Ssam * NB: this can happen as we allow pre-shared key 985178354Ssam * authentication to be enabled w/o wep being turned 986178354Ssam * on so that configuration of these can be done 987178354Ssam * in any order. It may be better to enforce the 988178354Ssam * ordering in which case this check would just be 989178354Ssam * for sanity/consistency. 990178354Ssam */ 991178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 992178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 993178354Ssam ni->ni_macaddr, "shared key auth", 994178354Ssam "%s", " PRIVACY is disabled"); 995178354Ssam estatus = IEEE80211_STATUS_ALG; 996178354Ssam goto bad; 997178354Ssam } 998178354Ssam /* 999178354Ssam * Pre-shared key authentication is evil; accept 1000178354Ssam * it only if explicitly configured (it is supported 1001178354Ssam * mainly for compatibility with clients like OS X). 1002178354Ssam */ 1003178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1004178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1005178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1006178354Ssam ni->ni_macaddr, "shared key auth", 1007178354Ssam "bad sta auth mode %u", ni->ni_authmode); 1008178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1009178354Ssam estatus = IEEE80211_STATUS_ALG; 1010178354Ssam goto bad; 1011178354Ssam } 1012178354Ssam 1013178354Ssam challenge = NULL; 1014178354Ssam if (frm + 1 < efrm) { 1015178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 1016178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1017178354Ssam ni->ni_macaddr, "shared key auth", 1018178354Ssam "ie %d/%d too long", 1019178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 1020178354Ssam vap->iv_stats.is_rx_bad_auth++; 1021178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1022178354Ssam goto bad; 1023178354Ssam } 1024178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1025178354Ssam challenge = frm; 1026178354Ssam frm += frm[1] + 2; 1027178354Ssam } 1028178354Ssam switch (seq) { 1029178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1030178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1031178354Ssam if (challenge == NULL) { 1032178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1033178354Ssam ni->ni_macaddr, "shared key auth", 1034178354Ssam "%s", "no challenge"); 1035178354Ssam vap->iv_stats.is_rx_bad_auth++; 1036178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1037178354Ssam goto bad; 1038178354Ssam } 1039178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1040178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1041178354Ssam ni->ni_macaddr, "shared key auth", 1042178354Ssam "bad challenge len %d", challenge[1]); 1043178354Ssam vap->iv_stats.is_rx_bad_auth++; 1044178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1045178354Ssam goto bad; 1046178354Ssam } 1047178354Ssam default: 1048178354Ssam break; 1049178354Ssam } 1050178354Ssam if (vap->iv_state != IEEE80211_S_AUTH) 1051178354Ssam return; 1052178354Ssam switch (seq) { 1053178354Ssam case IEEE80211_AUTH_SHARED_PASS: 1054178354Ssam if (ni->ni_challenge != NULL) { 1055283538Sadrian IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1056178354Ssam ni->ni_challenge = NULL; 1057178354Ssam } 1058178354Ssam if (status != 0) { 1059178354Ssam IEEE80211_NOTE_FRAME(vap, 1060178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1061178354Ssam "shared key auth failed (reason %d)", status); 1062178354Ssam vap->iv_stats.is_rx_auth_fail++; 1063178354Ssam vap->iv_stats.is_rx_authfail_code = status; 1064178354Ssam return; 1065178354Ssam } 1066178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1067178354Ssam break; 1068178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1069178354Ssam if (!ieee80211_alloc_challenge(ni)) 1070178354Ssam return; 1071178354Ssam /* XXX could optimize by passing recvd challenge */ 1072178354Ssam memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1073178354Ssam IEEE80211_SEND_MGMT(ni, 1074178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1075178354Ssam break; 1076178354Ssam default: 1077178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1078178354Ssam wh, "shared key auth", "bad seq %d", seq); 1079178354Ssam vap->iv_stats.is_rx_bad_auth++; 1080178354Ssam return; 1081178354Ssam } 1082178354Ssam return; 1083178354Ssambad: 1084178354Ssam /* 1085178354Ssam * Kick the state machine. This short-circuits 1086178354Ssam * using the mgt frame timeout to trigger the 1087178354Ssam * state transition. 1088178354Ssam */ 1089178354Ssam if (vap->iv_state == IEEE80211_S_AUTH) 1090178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 1091178354Ssam IEEE80211_SCAN_FAIL_STATUS); 1092178354Ssam} 1093178354Ssam 1094244060Sadrianint 1095178354Ssamieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1096178354Ssam const struct ieee80211_frame *wh) 1097178354Ssam{ 1098178354Ssam#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1099178354Ssam struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1100178354Ssam u_int len = frm[1], qosinfo; 1101178354Ssam int i; 1102178354Ssam 1103178354Ssam if (len < sizeof(struct ieee80211_wme_param)-2) { 1104178354Ssam IEEE80211_DISCARD_IE(vap, 1105178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1106178354Ssam wh, "WME", "too short, len %u", len); 1107178354Ssam return -1; 1108178354Ssam } 1109178354Ssam qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1110178354Ssam qosinfo &= WME_QOSINFO_COUNT; 1111178354Ssam /* XXX do proper check for wraparound */ 1112178354Ssam if (qosinfo == wme->wme_wmeChanParams.cap_info) 1113178354Ssam return 0; 1114178354Ssam frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1115178354Ssam for (i = 0; i < WME_NUM_AC; i++) { 1116178354Ssam struct wmeParams *wmep = 1117178354Ssam &wme->wme_wmeChanParams.cap_wmeParams[i]; 1118178354Ssam /* NB: ACI not used */ 1119178354Ssam wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1120178354Ssam wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1121178354Ssam wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1122178354Ssam wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1123178354Ssam wmep->wmep_txopLimit = LE_READ_2(frm+2); 1124178354Ssam frm += 4; 1125178354Ssam } 1126178354Ssam wme->wme_wmeChanParams.cap_info = qosinfo; 1127178354Ssam return 1; 1128178354Ssam#undef MS 1129178354Ssam} 1130178354Ssam 1131178354Ssam/* 1132193439Ssam * Process 11h Channel Switch Announcement (CSA) ie. If this 1133193439Ssam * is the first CSA then initiate the switch. Otherwise we 1134193439Ssam * track state and trigger completion and/or cancel of the switch. 1135193439Ssam * XXX should be public for IBSS use 1136193439Ssam */ 1137193439Ssamstatic void 1138193439Ssamieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1139193439Ssam const struct ieee80211_frame *wh) 1140193439Ssam{ 1141193439Ssam struct ieee80211com *ic = vap->iv_ic; 1142193439Ssam const struct ieee80211_csa_ie *csa = 1143193439Ssam (const struct ieee80211_csa_ie *) frm; 1144193439Ssam 1145193439Ssam KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1146193439Ssam ("state %s", ieee80211_state_name[vap->iv_state])); 1147193439Ssam 1148193439Ssam if (csa->csa_mode > 1) { 1149193439Ssam IEEE80211_DISCARD_IE(vap, 1150193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1151193439Ssam wh, "CSA", "invalid mode %u", csa->csa_mode); 1152193439Ssam return; 1153193439Ssam } 1154193439Ssam IEEE80211_LOCK(ic); 1155193439Ssam if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1156193439Ssam /* 1157193439Ssam * Convert the channel number to a channel reference. We 1158193439Ssam * try first to preserve turbo attribute of the current 1159193439Ssam * channel then fallback. Note this will not work if the 1160193439Ssam * CSA specifies a channel that requires a band switch (e.g. 1161193439Ssam * 11a => 11g). This is intentional as 11h is defined only 1162193439Ssam * for 5GHz/11a and because the switch does not involve a 1163193439Ssam * reassociation, protocol state (capabilities, negotated 1164193439Ssam * rates, etc) may/will be wrong. 1165193439Ssam */ 1166193439Ssam struct ieee80211_channel *c = 1167193439Ssam ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1168193439Ssam (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1169193439Ssam if (c == NULL) { 1170193439Ssam c = ieee80211_find_channel_byieee(ic, 1171193439Ssam csa->csa_newchan, 1172193439Ssam (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1173193439Ssam if (c == NULL) { 1174193439Ssam IEEE80211_DISCARD_IE(vap, 1175193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1176193439Ssam wh, "CSA", "invalid channel %u", 1177193439Ssam csa->csa_newchan); 1178193439Ssam goto done; 1179193439Ssam } 1180193439Ssam } 1181193439Ssam#if IEEE80211_CSA_COUNT_MIN > 0 1182193439Ssam if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1183193439Ssam /* 1184193439Ssam * Require at least IEEE80211_CSA_COUNT_MIN count to 1185193439Ssam * reduce the risk of being redirected by a fabricated 1186193439Ssam * CSA. If a valid CSA is dropped we'll still get a 1187193439Ssam * beacon miss when the AP leaves the channel so we'll 1188193439Ssam * eventually follow to the new channel. 1189193439Ssam * 1190193439Ssam * NOTE: this violates the 11h spec that states that 1191193439Ssam * count may be any value and if 0 then a switch 1192193439Ssam * should happen asap. 1193193439Ssam */ 1194193439Ssam IEEE80211_DISCARD_IE(vap, 1195193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1196193439Ssam wh, "CSA", "count %u too small, must be >= %u", 1197193439Ssam csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1198193439Ssam goto done; 1199193439Ssam } 1200193439Ssam#endif 1201193439Ssam ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1202193439Ssam } else { 1203193439Ssam /* 1204193439Ssam * Validate this ie against the initial CSA. We require 1205193439Ssam * mode and channel not change and the count must be 1206193439Ssam * monotonically decreasing. This may be pointless and 1207193439Ssam * canceling the switch as a result may be too paranoid but 1208193439Ssam * in the worst case if we drop out of CSA because of this 1209193439Ssam * and the AP does move then we'll just end up taking a 1210193439Ssam * beacon miss and scan to find the AP. 1211193439Ssam * 1212193439Ssam * XXX may want <= on count as we also process ProbeResp 1213193439Ssam * frames and those may come in w/ the same count as the 1214193439Ssam * previous beacon; but doing so leaves us open to a stuck 1215193439Ssam * count until we add a dead-man timer 1216193439Ssam */ 1217193439Ssam if (!(csa->csa_count < ic->ic_csa_count && 1218193439Ssam csa->csa_mode == ic->ic_csa_mode && 1219193439Ssam csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1220193439Ssam IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1221193439Ssam "CSA ie mismatch, initial ie <%d,%d,%d>, " 1222193439Ssam "this ie <%d,%d,%d>", ic->ic_csa_mode, 1223193439Ssam ic->ic_csa_newchan, ic->ic_csa_count, 1224193439Ssam csa->csa_mode, csa->csa_newchan, csa->csa_count); 1225193439Ssam ieee80211_csa_cancelswitch(ic); 1226193439Ssam } else { 1227193439Ssam if (csa->csa_count <= 1) 1228193439Ssam ieee80211_csa_completeswitch(ic); 1229193439Ssam else 1230193439Ssam ic->ic_csa_count = csa->csa_count; 1231193439Ssam } 1232193439Ssam } 1233193439Ssamdone: 1234193439Ssam IEEE80211_UNLOCK(ic); 1235193439Ssam} 1236193439Ssam 1237193439Ssam/* 1238178354Ssam * Return non-zero if a background scan may be continued: 1239178354Ssam * o bg scan is active 1240178354Ssam * o no channel switch is pending 1241178354Ssam * o there has not been any traffic recently 1242178354Ssam * 1243178354Ssam * Note we do not check if there is an administrative enable; 1244178354Ssam * this is only done to start the scan. We assume that any 1245178354Ssam * change in state will be accompanied by a request to cancel 1246178354Ssam * active scans which will otherwise cause this test to fail. 1247178354Ssam */ 1248178354Ssamstatic __inline int 1249178354Ssamcontbgscan(struct ieee80211vap *vap) 1250178354Ssam{ 1251178354Ssam struct ieee80211com *ic = vap->iv_ic; 1252178354Ssam 1253178354Ssam return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1254178354Ssam (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1255178354Ssam vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1256297405Sadrian ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1257178354Ssam} 1258178354Ssam 1259178354Ssam/* 1260178354Ssam * Return non-zero if a backgrond scan may be started: 1261178354Ssam * o bg scanning is administratively enabled 1262178354Ssam * o no channel switch is pending 1263178354Ssam * o we are not boosted on a dynamic turbo channel 1264178354Ssam * o there has not been a scan recently 1265178354Ssam * o there has not been any traffic recently 1266178354Ssam */ 1267178354Ssamstatic __inline int 1268178354Ssamstartbgscan(struct ieee80211vap *vap) 1269178354Ssam{ 1270178354Ssam struct ieee80211com *ic = vap->iv_ic; 1271178354Ssam 1272178354Ssam return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1273178354Ssam (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1274190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1275178354Ssam !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1276190391Ssam#endif 1277297405Sadrian ieee80211_time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1278297405Sadrian ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1279178354Ssam} 1280178354Ssam 1281178354Ssamstatic void 1282283535Sadriansta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1283283535Sadrian const struct ieee80211_rx_stats *rxs, 1284283535Sadrian int rssi, int nf) 1285178354Ssam{ 1286178354Ssam#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1287178354Ssam#define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1288178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1289178354Ssam struct ieee80211com *ic = ni->ni_ic; 1290283535Sadrian struct ieee80211_channel *rxchan = ic->ic_curchan; 1291178354Ssam struct ieee80211_frame *wh; 1292178354Ssam uint8_t *frm, *efrm; 1293178354Ssam uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1294178354Ssam uint8_t rate; 1295233452Sadrian int ht_state_change = 0; 1296178354Ssam 1297178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1298178354Ssam frm = (uint8_t *)&wh[1]; 1299178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1300178354Ssam switch (subtype) { 1301178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1302178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1303178354Ssam struct ieee80211_scanparams scan; 1304283535Sadrian struct ieee80211_channel *c; 1305178354Ssam /* 1306178354Ssam * We process beacon/probe response frames: 1307178354Ssam * o when scanning, or 1308178354Ssam * o station mode when associated (to collect state 1309191444Srpaulo * updates such as 802.11g slot time) 1310178354Ssam * Frames otherwise received are discarded. 1311178354Ssam */ 1312178354Ssam if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1313178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1314178354Ssam return; 1315178354Ssam } 1316283535Sadrian 1317283535Sadrian /* Override RX channel as appropriate */ 1318283535Sadrian if (rxs != NULL) { 1319283535Sadrian c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1320283535Sadrian if (c != NULL) 1321283535Sadrian rxchan = c; 1322283535Sadrian } 1323283535Sadrian 1324178354Ssam /* XXX probe response in sta mode when !scanning? */ 1325283535Sadrian if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) { 1326232270Sadrian if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1327232270Sadrian vap->iv_stats.is_beacon_bad++; 1328178354Ssam return; 1329232244Sadrian } 1330264855Sadrian 1331178354Ssam /* 1332178354Ssam * Count frame now that we know it's to be processed. 1333178354Ssam */ 1334178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1335178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1336178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1337178354Ssam } else 1338178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1339178354Ssam /* 1340178354Ssam * When operating in station mode, check for state updates. 1341178354Ssam * Be careful to ignore beacons received while doing a 1342178354Ssam * background scan. We consider only 11g/WMM stuff right now. 1343178354Ssam */ 1344178354Ssam if (ni->ni_associd != 0 && 1345178354Ssam ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1346178354Ssam IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1347178354Ssam /* record tsf of last beacon */ 1348178354Ssam memcpy(ni->ni_tstamp.data, scan.tstamp, 1349178354Ssam sizeof(ni->ni_tstamp)); 1350178354Ssam /* count beacon frame for s/w bmiss handling */ 1351178354Ssam vap->iv_swbmiss_count++; 1352178354Ssam vap->iv_bmiss_count = 0; 1353178354Ssam if (ni->ni_erp != scan.erp) { 1354178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1355178354Ssam wh->i_addr2, 1356178354Ssam "erp change: was 0x%x, now 0x%x", 1357178354Ssam ni->ni_erp, scan.erp); 1358178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1359178354Ssam (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1360178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1361178354Ssam else 1362178354Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1363178354Ssam ni->ni_erp = scan.erp; 1364178354Ssam /* XXX statistic */ 1365178354Ssam /* XXX driver notification */ 1366178354Ssam } 1367178354Ssam if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1368178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1369178354Ssam wh->i_addr2, 1370178354Ssam "capabilities change: was 0x%x, now 0x%x", 1371178354Ssam ni->ni_capinfo, scan.capinfo); 1372178354Ssam /* 1373178354Ssam * NB: we assume short preamble doesn't 1374178354Ssam * change dynamically 1375178354Ssam */ 1376178354Ssam ieee80211_set_shortslottime(ic, 1377178354Ssam IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1378178354Ssam (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1379178354Ssam ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1380178354Ssam | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1381178354Ssam /* XXX statistic */ 1382178354Ssam } 1383178354Ssam if (scan.wme != NULL && 1384178354Ssam (ni->ni_flags & IEEE80211_NODE_QOS) && 1385178354Ssam ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1386178354Ssam ieee80211_wme_updateparams(vap); 1387190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1388178354Ssam if (scan.ath != NULL) 1389178354Ssam ieee80211_parse_athparams(ni, scan.ath, wh); 1390190391Ssam#endif 1391183254Ssam if (scan.htcap != NULL && scan.htinfo != NULL && 1392193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1393178354Ssam /* XXX state changes? */ 1394233452Sadrian if (ieee80211_ht_updateparams(ni, 1395233452Sadrian scan.htcap, scan.htinfo)) 1396233452Sadrian ht_state_change = 1; 1397178354Ssam } 1398227331Sadrian if (scan.quiet) 1399227331Sadrian ic->ic_set_quiet(ni, scan.quiet); 1400264855Sadrian 1401178354Ssam if (scan.tim != NULL) { 1402178354Ssam struct ieee80211_tim_ie *tim = 1403178354Ssam (struct ieee80211_tim_ie *) scan.tim; 1404264855Sadrian /* 1405264855Sadrian * XXX Check/debug this code; see if it's about 1406264855Sadrian * the right time to force the VAP awake if we 1407264855Sadrian * receive a frame destined for us? 1408264855Sadrian */ 1409178354Ssam int aid = IEEE80211_AID(ni->ni_associd); 1410178354Ssam int ix = aid / NBBY; 1411178354Ssam int min = tim->tim_bitctl &~ 1; 1412178354Ssam int max = tim->tim_len + min - 4; 1413275983Sadrian int tim_ucast = 0, tim_mcast = 0; 1414264855Sadrian 1415264855Sadrian /* 1416264855Sadrian * Only do this for unicast traffic in the TIM 1417264855Sadrian * The multicast traffic notification for 1418264855Sadrian * the scan notification stuff should occur 1419264855Sadrian * differently. 1420264855Sadrian */ 1421264855Sadrian if (min <= ix && ix <= max && 1422264855Sadrian isset(tim->tim_bitmap - min, aid)) { 1423275983Sadrian tim_ucast = 1; 1424264855Sadrian } 1425264855Sadrian 1426264855Sadrian /* 1427275983Sadrian * Do a separate notification 1428264855Sadrian * for the multicast bit being set. 1429264855Sadrian */ 1430264906Sadrian if (tim->tim_bitctl & 1) { 1431275983Sadrian tim_mcast = 1; 1432275983Sadrian } 1433275983Sadrian 1434275983Sadrian /* 1435275983Sadrian * If the TIM indicates there's traffic for 1436275983Sadrian * us then get us out of STA mode powersave. 1437275983Sadrian */ 1438275983Sadrian if (tim_ucast == 1) { 1439275983Sadrian 1440275983Sadrian /* 1441275983Sadrian * Wake us out of SLEEP state if we're 1442275983Sadrian * in it; and if we're doing bgscan 1443275983Sadrian * then wake us out of STA powersave. 1444275983Sadrian */ 1445264855Sadrian ieee80211_sta_tim_notify(vap, 1); 1446275983Sadrian 1447275983Sadrian /* 1448275983Sadrian * This is preventing us from 1449275983Sadrian * continuing a bgscan; because it 1450275983Sadrian * tricks the contbgscan() 1451275983Sadrian * routine to think there's always 1452275983Sadrian * traffic for us. 1453275983Sadrian * 1454275983Sadrian * I think we need both an RX and 1455275983Sadrian * TX ic_lastdata field. 1456275983Sadrian */ 1457178354Ssam ic->ic_lastdata = ticks; 1458178354Ssam } 1459264906Sadrian 1460178354Ssam ni->ni_dtim_count = tim->tim_count; 1461178354Ssam ni->ni_dtim_period = tim->tim_period; 1462178354Ssam } 1463193439Ssam if (scan.csa != NULL && 1464193439Ssam (vap->iv_flags & IEEE80211_F_DOTH)) 1465193439Ssam ieee80211_parse_csaparams(vap, scan.csa, wh); 1466193439Ssam else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1467193439Ssam /* 1468193439Ssam * No CSA ie or 11h disabled, but a channel 1469193439Ssam * switch is pending; drop out so we aren't 1470193439Ssam * stuck in CSA state. If the AP really is 1471193439Ssam * moving we'll get a beacon miss and scan. 1472193439Ssam */ 1473193439Ssam IEEE80211_LOCK(ic); 1474193439Ssam ieee80211_csa_cancelswitch(ic); 1475193439Ssam IEEE80211_UNLOCK(ic); 1476193439Ssam } 1477178354Ssam /* 1478178354Ssam * If scanning, pass the info to the scan module. 1479178354Ssam * Otherwise, check if it's the right time to do 1480178354Ssam * a background scan. Background scanning must 1481178354Ssam * be enabled and we must not be operating in the 1482178354Ssam * turbo phase of dynamic turbo mode. Then, 1483178354Ssam * it's been a while since the last background 1484178354Ssam * scan and if no data frames have come through 1485178354Ssam * recently, kick off a scan. Note that this 1486178354Ssam * is the mechanism by which a background scan 1487178354Ssam * is started _and_ continued each time we 1488178354Ssam * return on-channel to receive a beacon from 1489178354Ssam * our ap. 1490178354Ssam */ 1491178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1492283535Sadrian ieee80211_add_scan(vap, rxchan, 1493282742Sadrian &scan, wh, subtype, rssi, nf); 1494178354Ssam } else if (contbgscan(vap)) { 1495178354Ssam ieee80211_bg_scan(vap, 0); 1496178354Ssam } else if (startbgscan(vap)) { 1497178354Ssam vap->iv_stats.is_scan_bg++; 1498178354Ssam#if 0 1499178354Ssam /* wakeup if we are sleeing */ 1500178354Ssam ieee80211_set_pwrsave(vap, 0); 1501178354Ssam#endif 1502178354Ssam ieee80211_bg_scan(vap, 0); 1503178354Ssam } 1504233452Sadrian 1505233452Sadrian /* 1506264855Sadrian * Put the station to sleep if we haven't seen 1507264855Sadrian * traffic in a while. 1508264855Sadrian */ 1509264855Sadrian IEEE80211_LOCK(ic); 1510264855Sadrian ieee80211_sta_ps_timer_check(vap); 1511264855Sadrian IEEE80211_UNLOCK(ic); 1512264855Sadrian 1513264855Sadrian /* 1514233452Sadrian * If we've had a channel width change (eg HT20<->HT40) 1515233452Sadrian * then schedule a delayed driver notification. 1516233452Sadrian */ 1517233452Sadrian if (ht_state_change) 1518233452Sadrian ieee80211_update_chw(ic); 1519178354Ssam return; 1520178354Ssam } 1521178354Ssam /* 1522178354Ssam * If scanning, just pass information to the scan module. 1523178354Ssam */ 1524178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1525178354Ssam if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1526178354Ssam /* 1527178354Ssam * Actively scanning a channel marked passive; 1528178354Ssam * send a probe request now that we know there 1529178354Ssam * is 802.11 traffic present. 1530178354Ssam * 1531178354Ssam * XXX check if the beacon we recv'd gives 1532178354Ssam * us what we need and suppress the probe req 1533178354Ssam */ 1534178354Ssam ieee80211_probe_curchan(vap, 1); 1535178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1536178354Ssam } 1537283535Sadrian ieee80211_add_scan(vap, rxchan, &scan, wh, 1538282742Sadrian subtype, rssi, nf); 1539178354Ssam return; 1540178354Ssam } 1541178354Ssam break; 1542178354Ssam } 1543178354Ssam 1544178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1545178354Ssam uint16_t algo, seq, status; 1546178354Ssam /* 1547178354Ssam * auth frame format 1548178354Ssam * [2] algorithm 1549178354Ssam * [2] sequence 1550178354Ssam * [2] status 1551178354Ssam * [tlv*] challenge 1552178354Ssam */ 1553178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1554178354Ssam algo = le16toh(*(uint16_t *)frm); 1555178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1556178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1557178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1558178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1559178354Ssam 1560178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1561178354Ssam IEEE80211_DISCARD(vap, 1562178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1563178354Ssam wh, "auth", "%s", "TKIP countermeasures enabled"); 1564178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1565178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1566178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1567178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1568178354Ssam IEEE80211_REASON_MIC_FAILURE); 1569178354Ssam } 1570178354Ssam return; 1571178354Ssam } 1572178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1573192468Ssam sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1574192468Ssam seq, status); 1575178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1576192468Ssam sta_auth_open(ni, wh, rssi, nf, seq, status); 1577178354Ssam else { 1578178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1579178354Ssam wh, "auth", "unsupported alg %d", algo); 1580178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1581178354Ssam return; 1582178354Ssam } 1583178354Ssam break; 1584178354Ssam } 1585178354Ssam 1586178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1587178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1588178354Ssam uint16_t capinfo, associd; 1589178354Ssam uint16_t status; 1590178354Ssam 1591178354Ssam if (vap->iv_state != IEEE80211_S_ASSOC) { 1592178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1593178354Ssam return; 1594178354Ssam } 1595178354Ssam 1596178354Ssam /* 1597178354Ssam * asresp frame format 1598178354Ssam * [2] capability information 1599178354Ssam * [2] status 1600178354Ssam * [2] association ID 1601178354Ssam * [tlv] supported rates 1602178354Ssam * [tlv] extended supported rates 1603178354Ssam * [tlv] WME 1604178354Ssam * [tlv] HT capabilities 1605178354Ssam * [tlv] HT info 1606178354Ssam */ 1607178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1608178354Ssam ni = vap->iv_bss; 1609178354Ssam capinfo = le16toh(*(uint16_t *)frm); 1610178354Ssam frm += 2; 1611178354Ssam status = le16toh(*(uint16_t *)frm); 1612178354Ssam frm += 2; 1613178354Ssam if (status != 0) { 1614178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1615178354Ssam wh->i_addr2, "%sassoc failed (reason %d)", 1616178354Ssam ISREASSOC(subtype) ? "re" : "", status); 1617178354Ssam vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1618178354Ssam return; 1619178354Ssam } 1620178354Ssam associd = le16toh(*(uint16_t *)frm); 1621178354Ssam frm += 2; 1622178354Ssam 1623178354Ssam rates = xrates = wme = htcap = htinfo = NULL; 1624178354Ssam while (efrm - frm > 1) { 1625178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1626178354Ssam switch (*frm) { 1627178354Ssam case IEEE80211_ELEMID_RATES: 1628178354Ssam rates = frm; 1629178354Ssam break; 1630178354Ssam case IEEE80211_ELEMID_XRATES: 1631178354Ssam xrates = frm; 1632178354Ssam break; 1633178354Ssam case IEEE80211_ELEMID_HTCAP: 1634178354Ssam htcap = frm; 1635178354Ssam break; 1636178354Ssam case IEEE80211_ELEMID_HTINFO: 1637178354Ssam htinfo = frm; 1638178354Ssam break; 1639178354Ssam case IEEE80211_ELEMID_VENDOR: 1640178354Ssam if (iswmeoui(frm)) 1641178354Ssam wme = frm; 1642193655Ssam else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1643178354Ssam /* 1644178354Ssam * Accept pre-draft HT ie's if the 1645178354Ssam * standard ones have not been seen. 1646178354Ssam */ 1647178354Ssam if (ishtcapoui(frm)) { 1648178354Ssam if (htcap == NULL) 1649178354Ssam htcap = frm; 1650178354Ssam } else if (ishtinfooui(frm)) { 1651178354Ssam if (htinfo == NULL) 1652219603Sbschmidt htinfo = frm; 1653178354Ssam } 1654178354Ssam } 1655178354Ssam /* XXX Atheros OUI support */ 1656178354Ssam break; 1657178354Ssam } 1658178354Ssam frm += frm[1] + 2; 1659178354Ssam } 1660178354Ssam 1661178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1662178354Ssam if (xrates != NULL) 1663178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1664178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1665178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 1666178354Ssam IEEE80211_F_JOIN | 1667178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1668178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1669178354Ssam if (rate & IEEE80211_RATE_BASIC) { 1670178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1671178354Ssam wh->i_addr2, 1672178354Ssam "%sassoc failed (rate set mismatch)", 1673178354Ssam ISREASSOC(subtype) ? "re" : ""); 1674178354Ssam vap->iv_stats.is_rx_assoc_norate++; 1675178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 1676178354Ssam IEEE80211_SCAN_FAIL_STATUS); 1677178354Ssam return; 1678178354Ssam } 1679178354Ssam 1680178354Ssam ni->ni_capinfo = capinfo; 1681178354Ssam ni->ni_associd = associd; 1682178354Ssam if (ni->ni_jointime == 0) 1683178354Ssam ni->ni_jointime = time_uptime; 1684178354Ssam if (wme != NULL && 1685178354Ssam ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1686178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 1687178354Ssam ieee80211_wme_updateparams(vap); 1688178354Ssam } else 1689178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 1690178354Ssam /* 1691178354Ssam * Setup HT state according to the negotiation. 1692178354Ssam * 1693178354Ssam * NB: shouldn't need to check if HT use is enabled but some 1694178354Ssam * ap's send back HT ie's even when we don't indicate we 1695178354Ssam * are HT capable in our AssocReq. 1696178354Ssam */ 1697178354Ssam if (htcap != NULL && htinfo != NULL && 1698193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1699183254Ssam ieee80211_ht_node_init(ni); 1700183254Ssam ieee80211_ht_updateparams(ni, htcap, htinfo); 1701178354Ssam ieee80211_setup_htrates(ni, htcap, 1702178354Ssam IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1703178354Ssam ieee80211_setup_basic_htrates(ni, htinfo); 1704193966Ssam ieee80211_node_setuptxparms(ni); 1705214894Sbschmidt ieee80211_ratectl_node_init(ni); 1706178354Ssam } 1707297603Sadrian 1708178354Ssam /* 1709178354Ssam * Configure state now that we are associated. 1710178354Ssam * 1711178354Ssam * XXX may need different/additional driver callbacks? 1712178354Ssam */ 1713178354Ssam if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1714178354Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1715178354Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1716178354Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1717178354Ssam } else { 1718178354Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1719178354Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1720178354Ssam } 1721178354Ssam ieee80211_set_shortslottime(ic, 1722178354Ssam IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1723178354Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1724178354Ssam /* 1725178354Ssam * Honor ERP protection. 1726178354Ssam * 1727178354Ssam * NB: ni_erp should zero for non-11g operation. 1728178354Ssam */ 1729178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1730178354Ssam (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1731178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1732178354Ssam else 1733178354Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1734178354Ssam IEEE80211_NOTE_MAC(vap, 1735178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1736183256Ssam "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1737178354Ssam ISREASSOC(subtype) ? "re" : "", 1738178354Ssam IEEE80211_NODE_AID(ni), 1739178354Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1740178354Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1741178354Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1742178354Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1743178354Ssam ni->ni_flags & IEEE80211_NODE_HT ? 1744182834Ssam (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1745178354Ssam ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1746183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1747183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1748183256Ssam ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1749178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1750178354Ssam ", fast-frames" : "", 1751178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1752178354Ssam ", turbo" : "" 1753178354Ssam ); 1754178354Ssam ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1755178354Ssam break; 1756178354Ssam } 1757178354Ssam 1758178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1759178354Ssam uint16_t reason; 1760178354Ssam 1761178354Ssam if (vap->iv_state == IEEE80211_S_SCAN) { 1762178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1763178354Ssam return; 1764178354Ssam } 1765178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1766178354Ssam /* NB: can happen when in promiscuous mode */ 1767178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1768178354Ssam break; 1769178354Ssam } 1770178354Ssam 1771178354Ssam /* 1772178354Ssam * deauth frame format 1773178354Ssam * [2] reason 1774178354Ssam */ 1775178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1776178354Ssam reason = le16toh(*(uint16_t *)frm); 1777178354Ssam 1778178354Ssam vap->iv_stats.is_rx_deauth++; 1779178354Ssam vap->iv_stats.is_rx_deauth_code = reason; 1780178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 1781178354Ssam 1782178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1783178354Ssam "recv deauthenticate (reason %d)", reason); 1784178354Ssam ieee80211_new_state(vap, IEEE80211_S_AUTH, 1785178354Ssam (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1786178354Ssam break; 1787178354Ssam } 1788178354Ssam 1789178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1790178354Ssam uint16_t reason; 1791178354Ssam 1792178354Ssam if (vap->iv_state != IEEE80211_S_RUN && 1793178354Ssam vap->iv_state != IEEE80211_S_ASSOC && 1794178354Ssam vap->iv_state != IEEE80211_S_AUTH) { 1795178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1796178354Ssam return; 1797178354Ssam } 1798178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1799178354Ssam /* NB: can happen when in promiscuous mode */ 1800178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1801178354Ssam break; 1802178354Ssam } 1803178354Ssam 1804178354Ssam /* 1805178354Ssam * disassoc frame format 1806178354Ssam * [2] reason 1807178354Ssam */ 1808178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1809178354Ssam reason = le16toh(*(uint16_t *)frm); 1810178354Ssam 1811178354Ssam vap->iv_stats.is_rx_disassoc++; 1812178354Ssam vap->iv_stats.is_rx_disassoc_code = reason; 1813178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 1814178354Ssam 1815178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1816178354Ssam "recv disassociate (reason %d)", reason); 1817178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1818178354Ssam break; 1819178354Ssam } 1820178354Ssam 1821178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 1822218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1823218958Sbschmidt if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1824218958Sbschmidt !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1825218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1826218958Sbschmidt wh, NULL, "%s", "not for us"); 1827218958Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 1828218958Sbschmidt } else if (vap->iv_state != IEEE80211_S_RUN) { 1829218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1830218927Sbschmidt wh, NULL, "wrong state %s", 1831218927Sbschmidt ieee80211_state_name[vap->iv_state]); 1832178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1833218958Sbschmidt } else { 1834218958Sbschmidt if (ieee80211_parse_action(ni, m0) == 0) 1835218958Sbschmidt (void)ic->ic_recv_action(ni, wh, frm, efrm); 1836218927Sbschmidt } 1837178354Ssam break; 1838178354Ssam 1839178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1840178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1841218927Sbschmidt case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1842295795Savos case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 1843218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ATIM: 1844218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1845218927Sbschmidt wh, NULL, "%s", "not handled"); 1846178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1847218927Sbschmidt break; 1848218927Sbschmidt 1849178354Ssam default: 1850178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1851218927Sbschmidt wh, "mgt", "subtype 0x%x not handled", subtype); 1852178354Ssam vap->iv_stats.is_rx_badsubtype++; 1853178354Ssam break; 1854178354Ssam } 1855178354Ssam#undef ISREASSOC 1856178354Ssam#undef ISPROBE 1857178354Ssam} 1858191546Ssam 1859191546Ssamstatic void 1860205277Srpaulosta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1861191546Ssam{ 1862205277Srpaulo switch (subtype) { 1863205277Srpaulo case IEEE80211_FC0_SUBTYPE_BAR: 1864205277Srpaulo ieee80211_recv_bar(ni, m); 1865205277Srpaulo break; 1866205277Srpaulo } 1867191546Ssam} 1868