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("$FreeBSD$"); 29178354Ssam#endif 30178354Ssam 31178354Ssam/* 32178354Ssam * IEEE 802.11 HOSTAP 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> 53178354Ssam#include <net/ethernet.h> 54178354Ssam 55178354Ssam#include <net/bpf.h> 56178354Ssam 57178354Ssam#include <net80211/ieee80211_var.h> 58178354Ssam#include <net80211/ieee80211_hostap.h> 59178354Ssam#include <net80211/ieee80211_input.h> 60190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 61190391Ssam#include <net80211/ieee80211_superg.h> 62190391Ssam#endif 63178354Ssam#include <net80211/ieee80211_wds.h> 64178354Ssam 65178354Ssam#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 66178354Ssam 67178354Ssamstatic void hostap_vattach(struct ieee80211vap *); 68178354Ssamstatic int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int); 69178354Ssamstatic int hostap_input(struct ieee80211_node *ni, struct mbuf *m, 70192468Ssam int rssi, int nf); 71178354Ssamstatic void hostap_deliver_data(struct ieee80211vap *, 72178354Ssam struct ieee80211_node *, struct mbuf *); 73178354Ssamstatic void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *, 74192468Ssam int subtype, int rssi, int nf); 75191546Ssamstatic void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 76178354Ssam 77178354Ssamvoid 78178354Ssamieee80211_hostap_attach(struct ieee80211com *ic) 79178354Ssam{ 80178354Ssam ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach; 81178354Ssam} 82178354Ssam 83178354Ssamvoid 84178354Ssamieee80211_hostap_detach(struct ieee80211com *ic) 85178354Ssam{ 86178354Ssam} 87178354Ssam 88178354Ssamstatic void 89178354Ssamhostap_vdetach(struct ieee80211vap *vap) 90178354Ssam{ 91178354Ssam} 92178354Ssam 93178354Ssamstatic void 94178354Ssamhostap_vattach(struct ieee80211vap *vap) 95178354Ssam{ 96178354Ssam vap->iv_newstate = hostap_newstate; 97178354Ssam vap->iv_input = hostap_input; 98178354Ssam vap->iv_recv_mgmt = hostap_recv_mgmt; 99191546Ssam vap->iv_recv_ctl = hostap_recv_ctl; 100178354Ssam vap->iv_opdetach = hostap_vdetach; 101178354Ssam vap->iv_deliver_data = hostap_deliver_data; 102241138Sadrian vap->iv_recv_pspoll = ieee80211_recv_pspoll; 103178354Ssam} 104178354Ssam 105178354Ssamstatic void 106178354Ssamsta_disassoc(void *arg, struct ieee80211_node *ni) 107178354Ssam{ 108178354Ssam struct ieee80211vap *vap = arg; 109178354Ssam 110178354Ssam if (ni->ni_vap == vap && ni->ni_associd != 0) { 111178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, 112178354Ssam IEEE80211_REASON_ASSOC_LEAVE); 113178354Ssam ieee80211_node_leave(ni); 114178354Ssam } 115178354Ssam} 116178354Ssam 117193413Ssamstatic void 118193413Ssamsta_csa(void *arg, struct ieee80211_node *ni) 119193413Ssam{ 120193413Ssam struct ieee80211vap *vap = arg; 121193413Ssam 122193413Ssam if (ni->ni_vap == vap && ni->ni_associd != 0) 123193413Ssam if (ni->ni_inact > vap->iv_inact_init) { 124193413Ssam ni->ni_inact = vap->iv_inact_init; 125193413Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 126193413Ssam "%s: inact %u", __func__, ni->ni_inact); 127193413Ssam } 128193413Ssam} 129193413Ssam 130193414Ssamstatic void 131193414Ssamsta_drop(void *arg, struct ieee80211_node *ni) 132193414Ssam{ 133193414Ssam struct ieee80211vap *vap = arg; 134193414Ssam 135193414Ssam if (ni->ni_vap == vap && ni->ni_associd != 0) 136193414Ssam ieee80211_node_leave(ni); 137193414Ssam} 138193414Ssam 139178354Ssam/* 140193414Ssam * Does a channel change require associated stations to re-associate 141193414Ssam * so protocol state is correct. This is used when doing CSA across 142193414Ssam * bands or similar (e.g. HT -> legacy). 143193414Ssam */ 144193414Ssamstatic int 145193414Ssamisbandchange(struct ieee80211com *ic) 146193414Ssam{ 147193414Ssam return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) & 148193414Ssam (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF | 149193414Ssam IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0; 150193414Ssam} 151193414Ssam 152193414Ssam/* 153178354Ssam * IEEE80211_M_HOSTAP vap state machine handler. 154178354Ssam */ 155178354Ssamstatic int 156178354Ssamhostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 157178354Ssam{ 158178354Ssam struct ieee80211com *ic = vap->iv_ic; 159178354Ssam enum ieee80211_state ostate; 160178354Ssam 161178354Ssam IEEE80211_LOCK_ASSERT(ic); 162178354Ssam 163178354Ssam ostate = vap->iv_state; 164178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 165178354Ssam __func__, ieee80211_state_name[ostate], 166178354Ssam ieee80211_state_name[nstate], arg); 167178354Ssam vap->iv_state = nstate; /* state transition */ 168178354Ssam if (ostate != IEEE80211_S_SCAN) 169178354Ssam ieee80211_cancel_scan(vap); /* background scan */ 170178354Ssam switch (nstate) { 171178354Ssam case IEEE80211_S_INIT: 172178354Ssam switch (ostate) { 173178354Ssam case IEEE80211_S_SCAN: 174178354Ssam ieee80211_cancel_scan(vap); 175178354Ssam break; 176178354Ssam case IEEE80211_S_CAC: 177178354Ssam ieee80211_dfs_cac_stop(vap); 178178354Ssam break; 179178354Ssam case IEEE80211_S_RUN: 180178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 181178354Ssam break; 182178354Ssam default: 183178354Ssam break; 184178354Ssam } 185178354Ssam if (ostate != IEEE80211_S_INIT) { 186178354Ssam /* NB: optimize INIT -> INIT case */ 187178354Ssam ieee80211_reset_bss(vap); 188178354Ssam } 189178354Ssam if (vap->iv_auth->ia_detach != NULL) 190178354Ssam vap->iv_auth->ia_detach(vap); 191178354Ssam break; 192178354Ssam case IEEE80211_S_SCAN: 193178354Ssam switch (ostate) { 194178354Ssam case IEEE80211_S_CSA: 195178354Ssam case IEEE80211_S_RUN: 196178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 197178354Ssam /* 198178354Ssam * Clear overlapping BSS state; the beacon frame 199178354Ssam * will be reconstructed on transition to the RUN 200178354Ssam * state and the timeout routines check if the flag 201178354Ssam * is set before doing anything so this is sufficient. 202178354Ssam */ 203178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 204193655Ssam ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR; 205178354Ssam /* fall thru... */ 206178354Ssam case IEEE80211_S_CAC: 207178354Ssam /* 208178354Ssam * NB: We may get here because of a manual channel 209178354Ssam * change in which case we need to stop CAC 210178354Ssam * XXX no need to stop if ostate RUN but it's ok 211178354Ssam */ 212178354Ssam ieee80211_dfs_cac_stop(vap); 213178354Ssam /* fall thru... */ 214178354Ssam case IEEE80211_S_INIT: 215178354Ssam if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 216178354Ssam !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) { 217178354Ssam /* 218178354Ssam * Already have a channel; bypass the 219178354Ssam * scan and startup immediately. 220178354Ssam * ieee80211_create_ibss will call back to 221178354Ssam * move us to RUN state. 222178354Ssam */ 223178354Ssam ieee80211_create_ibss(vap, vap->iv_des_chan); 224178354Ssam break; 225178354Ssam } 226178354Ssam /* 227178354Ssam * Initiate a scan. We can come here as a result 228178354Ssam * of an IEEE80211_IOC_SCAN_REQ too in which case 229178354Ssam * the vap will be marked with IEEE80211_FEXT_SCANREQ 230178354Ssam * and the scan request parameters will be present 231178354Ssam * in iv_scanreq. Otherwise we do the default. 232178354Ssam */ 233178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 234178354Ssam ieee80211_check_scan(vap, 235178354Ssam vap->iv_scanreq_flags, 236178354Ssam vap->iv_scanreq_duration, 237178354Ssam vap->iv_scanreq_mindwell, 238178354Ssam vap->iv_scanreq_maxdwell, 239178354Ssam vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 240178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 241178354Ssam } else 242178354Ssam ieee80211_check_scan_current(vap); 243178354Ssam break; 244178354Ssam case IEEE80211_S_SCAN: 245178354Ssam /* 246178354Ssam * A state change requires a reset; scan. 247178354Ssam */ 248178354Ssam ieee80211_check_scan_current(vap); 249178354Ssam break; 250178354Ssam default: 251178354Ssam break; 252178354Ssam } 253178354Ssam break; 254178354Ssam case IEEE80211_S_CAC: 255178354Ssam /* 256178354Ssam * Start CAC on a DFS channel. We come here when starting 257178354Ssam * a bss on a DFS channel (see ieee80211_create_ibss). 258178354Ssam */ 259178354Ssam ieee80211_dfs_cac_start(vap); 260178354Ssam break; 261178354Ssam case IEEE80211_S_RUN: 262178354Ssam if (vap->iv_flags & IEEE80211_F_WPA) { 263178354Ssam /* XXX validate prerequisites */ 264178354Ssam } 265178354Ssam switch (ostate) { 266178354Ssam case IEEE80211_S_INIT: 267178354Ssam /* 268178354Ssam * Already have a channel; bypass the 269178354Ssam * scan and startup immediately. 270178354Ssam * Note that ieee80211_create_ibss will call 271178354Ssam * back to do a RUN->RUN state change. 272178354Ssam */ 273178354Ssam ieee80211_create_ibss(vap, 274178354Ssam ieee80211_ht_adjust_channel(ic, 275193655Ssam ic->ic_curchan, vap->iv_flags_ht)); 276178354Ssam /* NB: iv_bss is changed on return */ 277178354Ssam break; 278178354Ssam case IEEE80211_S_CAC: 279178354Ssam /* 280178354Ssam * NB: This is the normal state change when CAC 281178354Ssam * expires and no radar was detected; no need to 282178354Ssam * clear the CAC timer as it's already expired. 283178354Ssam */ 284178354Ssam /* fall thru... */ 285178354Ssam case IEEE80211_S_CSA: 286178354Ssam /* 287193413Ssam * Shorten inactivity timer of associated stations 288193413Ssam * to weed out sta's that don't follow a CSA. 289193413Ssam */ 290193413Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 291193413Ssam /* 292178354Ssam * Update bss node channel to reflect where 293178354Ssam * we landed after CSA. 294178354Ssam */ 295178354Ssam ieee80211_node_set_chan(vap->iv_bss, 296178354Ssam ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 297178354Ssam ieee80211_htchanflags(vap->iv_bss->ni_chan))); 298178354Ssam /* XXX bypass debug msgs */ 299178354Ssam break; 300178354Ssam case IEEE80211_S_SCAN: 301178354Ssam case IEEE80211_S_RUN: 302178354Ssam#ifdef IEEE80211_DEBUG 303178354Ssam if (ieee80211_msg_debug(vap)) { 304178354Ssam struct ieee80211_node *ni = vap->iv_bss; 305178354Ssam ieee80211_note(vap, 306178354Ssam "synchronized with %s ssid ", 307178354Ssam ether_sprintf(ni->ni_bssid)); 308178354Ssam ieee80211_print_essid(ni->ni_essid, 309178354Ssam ni->ni_esslen); 310178354Ssam /* XXX MCS/HT */ 311178354Ssam printf(" channel %d start %uMb\n", 312178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 313178354Ssam IEEE80211_RATE2MBS(ni->ni_txrate)); 314178354Ssam } 315178354Ssam#endif 316178354Ssam break; 317178354Ssam default: 318178354Ssam break; 319178354Ssam } 320178354Ssam /* 321178354Ssam * Start/stop the authenticator. We delay until here 322178354Ssam * to allow configuration to happen out of order. 323178354Ssam */ 324178354Ssam if (vap->iv_auth->ia_attach != NULL) { 325178354Ssam /* XXX check failure */ 326178354Ssam vap->iv_auth->ia_attach(vap); 327178354Ssam } else if (vap->iv_auth->ia_detach != NULL) { 328178354Ssam vap->iv_auth->ia_detach(vap); 329178354Ssam } 330178354Ssam ieee80211_node_authorize(vap->iv_bss); 331178354Ssam break; 332193414Ssam case IEEE80211_S_CSA: 333193414Ssam if (ostate == IEEE80211_S_RUN && isbandchange(ic)) { 334193414Ssam /* 335193414Ssam * On a ``band change'' silently drop associated 336193414Ssam * stations as they must re-associate before they 337193414Ssam * can pass traffic (as otherwise protocol state 338193414Ssam * such as capabilities and the negotiated rate 339193414Ssam * set may/will be wrong). 340193414Ssam */ 341193414Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_drop, vap); 342193414Ssam } 343193414Ssam break; 344178354Ssam default: 345178354Ssam break; 346178354Ssam } 347178354Ssam return 0; 348178354Ssam} 349178354Ssam 350178354Ssamstatic void 351178354Ssamhostap_deliver_data(struct ieee80211vap *vap, 352178354Ssam struct ieee80211_node *ni, struct mbuf *m) 353178354Ssam{ 354178354Ssam struct ether_header *eh = mtod(m, struct ether_header *); 355178354Ssam struct ifnet *ifp = vap->iv_ifp; 356178354Ssam 357193292Ssam /* clear driver/net80211 flags before passing up */ 358254640Sadrian#if __FreeBSD_version >= 1000046 359254523Sandre m->m_flags &= ~(M_MCAST | M_BCAST); 360254523Sandre m_clrprotoflags(m); 361254640Sadrian#else 362254640Sadrian m->m_flags &= ~(M_80211_RX | M_MCAST | M_BCAST); 363254640Sadrian#endif 364193292Ssam 365178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, 366178354Ssam ("gack, opmode %d", vap->iv_opmode)); 367178354Ssam /* 368178354Ssam * Do accounting. 369178354Ssam */ 370178354Ssam ifp->if_ipackets++; 371178354Ssam IEEE80211_NODE_STAT(ni, rx_data); 372178354Ssam IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); 373178354Ssam if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 374178354Ssam m->m_flags |= M_MCAST; /* XXX M_BCAST? */ 375178354Ssam IEEE80211_NODE_STAT(ni, rx_mcast); 376178354Ssam } else 377178354Ssam IEEE80211_NODE_STAT(ni, rx_ucast); 378178354Ssam 379178354Ssam /* perform as a bridge within the AP */ 380178354Ssam if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) { 381178354Ssam struct mbuf *mcopy = NULL; 382178354Ssam 383178354Ssam if (m->m_flags & M_MCAST) { 384243882Sglebius mcopy = m_dup(m, M_NOWAIT); 385178354Ssam if (mcopy == NULL) 386178354Ssam ifp->if_oerrors++; 387178354Ssam else 388178354Ssam mcopy->m_flags |= M_MCAST; 389178354Ssam } else { 390178354Ssam /* 391178354Ssam * Check if the destination is associated with the 392178354Ssam * same vap and authorized to receive traffic. 393178354Ssam * Beware of traffic destined for the vap itself; 394178354Ssam * sending it will not work; just let it be delivered 395178354Ssam * normally. 396178354Ssam */ 397178354Ssam struct ieee80211_node *sta = ieee80211_find_vap_node( 398178354Ssam &vap->iv_ic->ic_sta, vap, eh->ether_dhost); 399178354Ssam if (sta != NULL) { 400178354Ssam if (ieee80211_node_is_authorized(sta)) { 401178354Ssam /* 402178354Ssam * Beware of sending to ourself; this 403178354Ssam * needs to happen via the normal 404178354Ssam * input path. 405178354Ssam */ 406178354Ssam if (sta != vap->iv_bss) { 407178354Ssam mcopy = m; 408178354Ssam m = NULL; 409178354Ssam } 410178354Ssam } else { 411178354Ssam vap->iv_stats.is_rx_unauth++; 412178354Ssam IEEE80211_NODE_STAT(sta, rx_unauth); 413178354Ssam } 414178354Ssam ieee80211_free_node(sta); 415178354Ssam } 416178354Ssam } 417178354Ssam if (mcopy != NULL) { 418178354Ssam int len, err; 419178354Ssam len = mcopy->m_pkthdr.len; 420254082Sadrian err = ieee80211_vap_xmitpkt(vap, mcopy); 421178354Ssam if (err) { 422178354Ssam /* NB: IFQ_HANDOFF reclaims mcopy */ 423178354Ssam } else { 424178354Ssam ifp->if_opackets++; 425178354Ssam } 426178354Ssam } 427178354Ssam } 428178354Ssam if (m != NULL) { 429178354Ssam /* 430178354Ssam * Mark frame as coming from vap's interface. 431178354Ssam */ 432178354Ssam m->m_pkthdr.rcvif = ifp; 433178354Ssam if (m->m_flags & M_MCAST) { 434178354Ssam /* 435178354Ssam * Spam DWDS vap's w/ multicast traffic. 436178354Ssam */ 437178354Ssam /* XXX only if dwds in use? */ 438178354Ssam ieee80211_dwds_mcast(vap, m); 439178354Ssam } 440178354Ssam if (ni->ni_vlan != 0) { 441178354Ssam /* attach vlan tag */ 442178354Ssam m->m_pkthdr.ether_vtag = ni->ni_vlan; 443178354Ssam m->m_flags |= M_VLANTAG; 444178354Ssam } 445178354Ssam ifp->if_input(ifp, m); 446178354Ssam } 447178354Ssam} 448178354Ssam 449178354Ssam/* 450178354Ssam * Decide if a received management frame should be 451178354Ssam * printed when debugging is enabled. This filters some 452178354Ssam * of the less interesting frames that come frequently 453178354Ssam * (e.g. beacons). 454178354Ssam */ 455178354Ssamstatic __inline int 456178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 457178354Ssam{ 458178354Ssam switch (subtype) { 459178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 460178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 461178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 462178354Ssam return 0; 463178354Ssam } 464178354Ssam return 1; 465178354Ssam} 466178354Ssam 467178354Ssam/* 468178354Ssam * Process a received frame. The node associated with the sender 469178354Ssam * should be supplied. If nothing was found in the node table then 470178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 471178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 472178354Ssam * during AP scanning to select a AP to associate with; it can have 473178354Ssam * any units so long as values have consistent units and higher values 474178354Ssam * mean ``better signal''. The receive timestamp is currently not used 475178354Ssam * by the 802.11 layer. 476178354Ssam */ 477178354Ssamstatic int 478192468Ssamhostap_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 479178354Ssam{ 480178354Ssam#define HAS_SEQ(type) ((type & 0x4) == 0) 481178354Ssam struct ieee80211vap *vap = ni->ni_vap; 482178354Ssam struct ieee80211com *ic = ni->ni_ic; 483178354Ssam struct ifnet *ifp = vap->iv_ifp; 484178354Ssam struct ieee80211_frame *wh; 485178354Ssam struct ieee80211_key *key; 486178354Ssam struct ether_header *eh; 487203422Srpaulo int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 488178354Ssam uint8_t dir, type, subtype, qos; 489178354Ssam uint8_t *bssid; 490178354Ssam uint16_t rxseq; 491178354Ssam 492183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 493178354Ssam /* 494178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 495183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 496183247Ssam * here but were received out of order and been held on 497183247Ssam * the reorder queue. When resubmitted they are marked 498183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 499183247Ssam * the normal processing. 500178354Ssam */ 501178354Ssam wh = mtod(m, struct ieee80211_frame *); 502178354Ssam type = IEEE80211_FC0_TYPE_DATA; 503178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 504178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 505178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 506178354Ssam goto resubmit_ampdu; 507178354Ssam } 508178354Ssam 509178354Ssam KASSERT(ni != NULL, ("null node")); 510178354Ssam ni->ni_inact = ni->ni_inact_reload; 511178354Ssam 512178354Ssam type = -1; /* undefined */ 513178354Ssam 514178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 515178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 516178354Ssam ni->ni_macaddr, NULL, 517178354Ssam "too short (1): len %u", m->m_pkthdr.len); 518178354Ssam vap->iv_stats.is_rx_tooshort++; 519178354Ssam goto out; 520178354Ssam } 521178354Ssam /* 522178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 523178354Ssam * frame format but don't reference fields past outside 524178354Ssam * ieee80211_frame_min w/o first validating the data is 525178354Ssam * present. 526178354Ssam */ 527178354Ssam wh = mtod(m, struct ieee80211_frame *); 528178354Ssam 529178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 530178354Ssam IEEE80211_FC0_VERSION_0) { 531178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 532191547Ssam ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 533191547Ssam wh->i_fc[0], wh->i_fc[1]); 534178354Ssam vap->iv_stats.is_rx_badversion++; 535178354Ssam goto err; 536178354Ssam } 537178354Ssam 538178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 539178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 540178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 541178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 542178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) 543178354Ssam bssid = wh->i_addr1; 544178354Ssam else if (type == IEEE80211_FC0_TYPE_CTL) 545178354Ssam bssid = wh->i_addr1; 546178354Ssam else { 547178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 548178354Ssam IEEE80211_DISCARD_MAC(vap, 549178354Ssam IEEE80211_MSG_ANY, ni->ni_macaddr, 550178354Ssam NULL, "too short (2): len %u", 551178354Ssam m->m_pkthdr.len); 552178354Ssam vap->iv_stats.is_rx_tooshort++; 553178354Ssam goto out; 554178354Ssam } 555178354Ssam bssid = wh->i_addr3; 556178354Ssam } 557178354Ssam /* 558178354Ssam * Validate the bssid. 559178354Ssam */ 560178354Ssam if (!(type == IEEE80211_FC0_TYPE_MGT && 561178354Ssam subtype == IEEE80211_FC0_SUBTYPE_BEACON) && 562178354Ssam !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && 563178354Ssam !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { 564178354Ssam /* not interested in */ 565178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 566178354Ssam bssid, NULL, "%s", "not to bss"); 567178354Ssam vap->iv_stats.is_rx_wrongbss++; 568178354Ssam goto out; 569178354Ssam } 570178354Ssam 571178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 572192468Ssam ni->ni_noise = nf; 573178354Ssam if (HAS_SEQ(type)) { 574178354Ssam uint8_t tid = ieee80211_gettid(wh); 575178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 576178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 577178354Ssam ic->ic_wme.wme_hipri_traffic++; 578178354Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 579221418Sadrian if (! ieee80211_check_rxseq(ni, wh)) { 580178354Ssam /* duplicate, discard */ 581178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 582178354Ssam bssid, "duplicate", 583178354Ssam "seqno <%u,%u> fragno <%u,%u> tid %u", 584178354Ssam rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 585178354Ssam ni->ni_rxseqs[tid] >> 586178354Ssam IEEE80211_SEQ_SEQ_SHIFT, 587178354Ssam rxseq & IEEE80211_SEQ_FRAG_MASK, 588178354Ssam ni->ni_rxseqs[tid] & 589178354Ssam IEEE80211_SEQ_FRAG_MASK, 590178354Ssam tid); 591178354Ssam vap->iv_stats.is_rx_dup++; 592178354Ssam IEEE80211_NODE_STAT(ni, rx_dup); 593178354Ssam goto out; 594178354Ssam } 595178354Ssam ni->ni_rxseqs[tid] = rxseq; 596178354Ssam } 597178354Ssam } 598178354Ssam 599178354Ssam switch (type) { 600178354Ssam case IEEE80211_FC0_TYPE_DATA: 601178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 602178354Ssam if (m->m_len < hdrspace && 603178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 604178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 605178354Ssam ni->ni_macaddr, NULL, 606178354Ssam "data too short: expecting %u", hdrspace); 607178354Ssam vap->iv_stats.is_rx_tooshort++; 608178354Ssam goto out; /* XXX */ 609178354Ssam } 610178354Ssam if (!(dir == IEEE80211_FC1_DIR_TODS || 611178354Ssam (dir == IEEE80211_FC1_DIR_DSTODS && 612178354Ssam (vap->iv_flags & IEEE80211_F_DWDS)))) { 613178354Ssam if (dir != IEEE80211_FC1_DIR_DSTODS) { 614178354Ssam IEEE80211_DISCARD(vap, 615178354Ssam IEEE80211_MSG_INPUT, wh, "data", 616178354Ssam "incorrect dir 0x%x", dir); 617178354Ssam } else { 618178354Ssam IEEE80211_DISCARD(vap, 619178354Ssam IEEE80211_MSG_INPUT | 620178354Ssam IEEE80211_MSG_WDS, wh, 621178354Ssam "4-address data", 622178354Ssam "%s", "DWDS not enabled"); 623178354Ssam } 624178354Ssam vap->iv_stats.is_rx_wrongdir++; 625178354Ssam goto out; 626178354Ssam } 627178354Ssam /* check if source STA is associated */ 628178354Ssam if (ni == vap->iv_bss) { 629178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 630178354Ssam wh, "data", "%s", "unknown src"); 631178354Ssam ieee80211_send_error(ni, wh->i_addr2, 632178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 633178354Ssam IEEE80211_REASON_NOT_AUTHED); 634178354Ssam vap->iv_stats.is_rx_notassoc++; 635178354Ssam goto err; 636178354Ssam } 637178354Ssam if (ni->ni_associd == 0) { 638178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 639178354Ssam wh, "data", "%s", "unassoc src"); 640178354Ssam IEEE80211_SEND_MGMT(ni, 641178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 642178354Ssam IEEE80211_REASON_NOT_ASSOCED); 643178354Ssam vap->iv_stats.is_rx_notassoc++; 644178354Ssam goto err; 645178354Ssam } 646178354Ssam 647178354Ssam /* 648178354Ssam * Check for power save state change. 649178354Ssam * XXX out-of-order A-MPDU frames? 650178354Ssam */ 651178354Ssam if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^ 652178354Ssam (ni->ni_flags & IEEE80211_NODE_PWR_MGT))) 653241138Sadrian vap->iv_node_ps(ni, 654178354Ssam wh->i_fc[1] & IEEE80211_FC1_PWR_MGT); 655178354Ssam /* 656178354Ssam * For 4-address packets handle WDS discovery 657178354Ssam * notifications. Once a WDS link is setup frames 658178354Ssam * are just delivered to the WDS vap (see below). 659178354Ssam */ 660178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) { 661178354Ssam if (!ieee80211_node_is_authorized(ni)) { 662178354Ssam IEEE80211_DISCARD(vap, 663178354Ssam IEEE80211_MSG_INPUT | 664178354Ssam IEEE80211_MSG_WDS, wh, 665178354Ssam "4-address data", 666178354Ssam "%s", "unauthorized port"); 667178354Ssam vap->iv_stats.is_rx_unauth++; 668178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 669178354Ssam goto err; 670178354Ssam } 671178354Ssam ieee80211_dwds_discover(ni, m); 672178354Ssam return type; 673178354Ssam } 674178354Ssam 675178354Ssam /* 676183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 677183247Ssam * processed directly then ieee80211_ampdu_reorder 678178354Ssam * will return 0; otherwise it has consumed the mbuf 679178354Ssam * and we should do nothing more with it. 680178354Ssam */ 681183247Ssam if ((m->m_flags & M_AMPDU) && 682178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 683178354Ssam m = NULL; 684178354Ssam goto out; 685178354Ssam } 686178354Ssam resubmit_ampdu: 687178354Ssam 688178354Ssam /* 689178354Ssam * Handle privacy requirements. Note that we 690178354Ssam * must not be preempted from here until after 691178354Ssam * we (potentially) call ieee80211_crypto_demic; 692178354Ssam * otherwise we may violate assumptions in the 693178354Ssam * crypto cipher modules used to do delayed update 694178354Ssam * of replay sequence numbers. 695178354Ssam */ 696262007Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 697178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 698178354Ssam /* 699178354Ssam * Discard encrypted frames when privacy is off. 700178354Ssam */ 701178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 702178354Ssam wh, "WEP", "%s", "PRIVACY off"); 703178354Ssam vap->iv_stats.is_rx_noprivacy++; 704178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 705178354Ssam goto out; 706178354Ssam } 707178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 708178354Ssam if (key == NULL) { 709178354Ssam /* NB: stats+msgs handled in crypto_decap */ 710178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 711178354Ssam goto out; 712178354Ssam } 713178354Ssam wh = mtod(m, struct ieee80211_frame *); 714262007Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 715178354Ssam } else { 716178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 717178354Ssam key = NULL; 718178354Ssam } 719178354Ssam 720178354Ssam /* 721178354Ssam * Save QoS bits for use below--before we strip the header. 722178354Ssam */ 723178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 724178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 725178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 726178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 727178354Ssam } else 728178354Ssam qos = 0; 729178354Ssam 730178354Ssam /* 731178354Ssam * Next up, any fragmentation. 732178354Ssam */ 733178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 734178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 735178354Ssam if (m == NULL) { 736178354Ssam /* Fragment dropped or frame not complete yet */ 737178354Ssam goto out; 738178354Ssam } 739178354Ssam } 740178354Ssam wh = NULL; /* no longer valid, catch any uses */ 741178354Ssam 742178354Ssam /* 743178354Ssam * Next strip any MSDU crypto bits. 744178354Ssam */ 745178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 746178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 747178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 748178354Ssam vap->iv_stats.is_rx_demicfail++; 749178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 750178354Ssam goto out; 751178354Ssam } 752178354Ssam /* copy to listener after decrypt */ 753192468Ssam if (ieee80211_radiotap_active_vap(vap)) 754192468Ssam ieee80211_radiotap_rx(vap, m); 755178354Ssam need_tap = 0; 756178354Ssam /* 757178354Ssam * Finally, strip the 802.11 header. 758178354Ssam */ 759178354Ssam m = ieee80211_decap(vap, m, hdrspace); 760178354Ssam if (m == NULL) { 761178354Ssam /* XXX mask bit to check for both */ 762178354Ssam /* don't count Null data frames as errors */ 763178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 764178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 765178354Ssam goto out; 766178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 767178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 768178354Ssam vap->iv_stats.is_rx_decap++; 769178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 770178354Ssam goto err; 771178354Ssam } 772178354Ssam eh = mtod(m, struct ether_header *); 773178354Ssam if (!ieee80211_node_is_authorized(ni)) { 774178354Ssam /* 775178354Ssam * Deny any non-PAE frames received prior to 776178354Ssam * authorization. For open/shared-key 777178354Ssam * authentication the port is mark authorized 778178354Ssam * after authentication completes. For 802.1x 779178354Ssam * the port is not marked authorized by the 780178354Ssam * authenticator until the handshake has completed. 781178354Ssam */ 782178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 783178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 784178354Ssam eh->ether_shost, "data", 785178354Ssam "unauthorized port: ether type 0x%x len %u", 786178354Ssam eh->ether_type, m->m_pkthdr.len); 787178354Ssam vap->iv_stats.is_rx_unauth++; 788178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 789178354Ssam goto err; 790178354Ssam } 791178354Ssam } else { 792178354Ssam /* 793178354Ssam * When denying unencrypted frames, discard 794178354Ssam * any non-PAE frames received without encryption. 795178354Ssam */ 796178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 797178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 798178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 799178354Ssam /* 800178354Ssam * Drop unencrypted frames. 801178354Ssam */ 802178354Ssam vap->iv_stats.is_rx_unencrypted++; 803178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 804178354Ssam goto out; 805178354Ssam } 806178354Ssam } 807178354Ssam /* XXX require HT? */ 808178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 809178354Ssam m = ieee80211_decap_amsdu(ni, m); 810178354Ssam if (m == NULL) 811178354Ssam return IEEE80211_FC0_TYPE_DATA; 812190391Ssam } else { 813190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 814190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 815190391Ssam if (m == NULL) 816178354Ssam return IEEE80211_FC0_TYPE_DATA; 817190391Ssam#endif 818178354Ssam } 819178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) 820178354Ssam ieee80211_deliver_data(ni->ni_wdsvap, ni, m); 821178354Ssam else 822178354Ssam hostap_deliver_data(vap, ni, m); 823178354Ssam return IEEE80211_FC0_TYPE_DATA; 824178354Ssam 825178354Ssam case IEEE80211_FC0_TYPE_MGT: 826178354Ssam vap->iv_stats.is_rx_mgmt++; 827178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 828178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 829178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 830178354Ssam wh, "mgt", "incorrect dir 0x%x", dir); 831178354Ssam vap->iv_stats.is_rx_wrongdir++; 832178354Ssam goto err; 833178354Ssam } 834178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 835178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 836178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 837178354Ssam m->m_pkthdr.len); 838178354Ssam vap->iv_stats.is_rx_tooshort++; 839178354Ssam goto out; 840178354Ssam } 841178354Ssam if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 842178354Ssam /* ensure return frames are unicast */ 843178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 844178354Ssam wh, NULL, "source is multicast: %s", 845178354Ssam ether_sprintf(wh->i_addr2)); 846178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 847178354Ssam goto out; 848178354Ssam } 849178354Ssam#ifdef IEEE80211_DEBUG 850178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 851178354Ssam ieee80211_msg_dumppkts(vap)) { 852178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 853178354Ssam ieee80211_mgt_subtype_name[subtype >> 854178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 855178354Ssam ether_sprintf(wh->i_addr2), rssi); 856178354Ssam } 857178354Ssam#endif 858262007Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 859178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 860178354Ssam /* 861178354Ssam * Only shared key auth frames with a challenge 862178354Ssam * should be encrypted, discard all others. 863178354Ssam */ 864178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 865178354Ssam wh, NULL, 866178354Ssam "%s", "WEP set but not permitted"); 867178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 868178354Ssam goto out; 869178354Ssam } 870178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 871178354Ssam /* 872178354Ssam * Discard encrypted frames when privacy is off. 873178354Ssam */ 874178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 875178354Ssam wh, NULL, "%s", "WEP set but PRIVACY off"); 876178354Ssam vap->iv_stats.is_rx_noprivacy++; 877178354Ssam goto out; 878178354Ssam } 879178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 880178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 881178354Ssam if (key == NULL) { 882178354Ssam /* NB: stats+msgs handled in crypto_decap */ 883178354Ssam goto out; 884178354Ssam } 885178354Ssam wh = mtod(m, struct ieee80211_frame *); 886262007Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 887178354Ssam } 888205791Srpaulo /* 889205791Srpaulo * Pass the packet to radiotap before calling iv_recv_mgmt(). 890205791Srpaulo * Otherwise iv_recv_mgmt() might pass another packet to 891205791Srpaulo * radiotap, resulting in out of order packet captures. 892205791Srpaulo */ 893205516Srpaulo if (ieee80211_radiotap_active_vap(vap)) 894205516Srpaulo ieee80211_radiotap_rx(vap, m); 895205516Srpaulo need_tap = 0; 896192468Ssam vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 897191534Ssam goto out; 898178354Ssam 899178354Ssam case IEEE80211_FC0_TYPE_CTL: 900178354Ssam vap->iv_stats.is_rx_ctl++; 901178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 902191546Ssam vap->iv_recv_ctl(ni, m, subtype); 903178354Ssam goto out; 904178354Ssam default: 905178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 906178354Ssam wh, "bad", "frame type 0x%x", type); 907178354Ssam /* should not come here */ 908178354Ssam break; 909178354Ssam } 910178354Ssamerr: 911178354Ssam ifp->if_ierrors++; 912178354Ssamout: 913178354Ssam if (m != NULL) { 914192765Ssam if (need_tap && ieee80211_radiotap_active_vap(vap)) 915192468Ssam ieee80211_radiotap_rx(vap, m); 916178354Ssam m_freem(m); 917178354Ssam } 918178354Ssam return type; 919178354Ssam} 920178354Ssam 921178354Ssamstatic void 922178354Ssamhostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 923192468Ssam int rssi, int nf, uint16_t seq, uint16_t status) 924178354Ssam{ 925178354Ssam struct ieee80211vap *vap = ni->ni_vap; 926178354Ssam 927178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 928178354Ssam 929178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 930178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 931178354Ssam ni->ni_macaddr, "open auth", 932178354Ssam "bad sta auth mode %u", ni->ni_authmode); 933178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 934178354Ssam /* 935178354Ssam * Clear any challenge text that may be there if 936178354Ssam * a previous shared key auth failed and then an 937178354Ssam * open auth is attempted. 938178354Ssam */ 939178354Ssam if (ni->ni_challenge != NULL) { 940186302Ssam free(ni->ni_challenge, M_80211_NODE); 941178354Ssam ni->ni_challenge = NULL; 942178354Ssam } 943178354Ssam /* XXX hack to workaround calling convention */ 944178354Ssam ieee80211_send_error(ni, wh->i_addr2, 945178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 946178354Ssam (seq + 1) | (IEEE80211_STATUS_ALG<<16)); 947178354Ssam return; 948178354Ssam } 949178354Ssam if (seq != IEEE80211_AUTH_OPEN_REQUEST) { 950178354Ssam vap->iv_stats.is_rx_bad_auth++; 951178354Ssam return; 952178354Ssam } 953178354Ssam /* always accept open authentication requests */ 954178354Ssam if (ni == vap->iv_bss) { 955178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 956178354Ssam if (ni == NULL) 957178354Ssam return; 958178354Ssam } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 959178354Ssam (void) ieee80211_ref_node(ni); 960178354Ssam /* 961178354Ssam * Mark the node as referenced to reflect that it's 962178354Ssam * reference count has been bumped to insure it remains 963178354Ssam * after the transaction completes. 964178354Ssam */ 965178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 966186099Ssam /* 967186151Ssam * Mark the node as requiring a valid association id 968186099Ssam * before outbound traffic is permitted. 969186099Ssam */ 970186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 971178354Ssam 972178354Ssam if (vap->iv_acl != NULL && 973178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 974178354Ssam /* 975178354Ssam * When the ACL policy is set to RADIUS we defer the 976178354Ssam * authorization to a user agent. Dispatch an event, 977178354Ssam * a subsequent MLME call will decide the fate of the 978178354Ssam * station. If the user agent is not present then the 979178354Ssam * node will be reclaimed due to inactivity. 980178354Ssam */ 981178354Ssam IEEE80211_NOTE_MAC(vap, 982178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, 983178354Ssam "%s", "station authentication defered (radius acl)"); 984178354Ssam ieee80211_notify_node_auth(ni); 985178354Ssam } else { 986178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 987178354Ssam IEEE80211_NOTE_MAC(vap, 988178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr, 989178354Ssam "%s", "station authenticated (open)"); 990178354Ssam /* 991178354Ssam * When 802.1x is not in use mark the port 992178354Ssam * authorized at this point so traffic can flow. 993178354Ssam */ 994178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 995178354Ssam ieee80211_node_authorize(ni); 996178354Ssam } 997178354Ssam} 998178354Ssam 999178354Ssamstatic void 1000178354Ssamhostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 1001192468Ssam uint8_t *frm, uint8_t *efrm, int rssi, int nf, 1002178354Ssam uint16_t seq, uint16_t status) 1003178354Ssam{ 1004178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1005178354Ssam uint8_t *challenge; 1006178354Ssam int allocbs, estatus; 1007178354Ssam 1008178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 1009178354Ssam 1010178354Ssam /* 1011178354Ssam * NB: this can happen as we allow pre-shared key 1012178354Ssam * authentication to be enabled w/o wep being turned 1013178354Ssam * on so that configuration of these can be done 1014178354Ssam * in any order. It may be better to enforce the 1015178354Ssam * ordering in which case this check would just be 1016178354Ssam * for sanity/consistency. 1017178354Ssam */ 1018178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 1019178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1020178354Ssam ni->ni_macaddr, "shared key auth", 1021178354Ssam "%s", " PRIVACY is disabled"); 1022178354Ssam estatus = IEEE80211_STATUS_ALG; 1023178354Ssam goto bad; 1024178354Ssam } 1025178354Ssam /* 1026178354Ssam * Pre-shared key authentication is evil; accept 1027178354Ssam * it only if explicitly configured (it is supported 1028178354Ssam * mainly for compatibility with clients like Mac OS X). 1029178354Ssam */ 1030178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1031178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1032178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1033178354Ssam ni->ni_macaddr, "shared key auth", 1034178354Ssam "bad sta auth mode %u", ni->ni_authmode); 1035178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1036178354Ssam estatus = IEEE80211_STATUS_ALG; 1037178354Ssam goto bad; 1038178354Ssam } 1039178354Ssam 1040178354Ssam challenge = NULL; 1041178354Ssam if (frm + 1 < efrm) { 1042178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 1043178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1044178354Ssam ni->ni_macaddr, "shared key auth", 1045178354Ssam "ie %d/%d too long", 1046178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 1047178354Ssam vap->iv_stats.is_rx_bad_auth++; 1048178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1049178354Ssam goto bad; 1050178354Ssam } 1051178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1052178354Ssam challenge = frm; 1053178354Ssam frm += frm[1] + 2; 1054178354Ssam } 1055178354Ssam switch (seq) { 1056178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1057178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1058178354Ssam if (challenge == NULL) { 1059178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1060178354Ssam ni->ni_macaddr, "shared key auth", 1061178354Ssam "%s", "no challenge"); 1062178354Ssam vap->iv_stats.is_rx_bad_auth++; 1063178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1064178354Ssam goto bad; 1065178354Ssam } 1066178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1067178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1068178354Ssam ni->ni_macaddr, "shared key auth", 1069178354Ssam "bad challenge len %d", challenge[1]); 1070178354Ssam vap->iv_stats.is_rx_bad_auth++; 1071178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1072178354Ssam goto bad; 1073178354Ssam } 1074178354Ssam default: 1075178354Ssam break; 1076178354Ssam } 1077178354Ssam switch (seq) { 1078178354Ssam case IEEE80211_AUTH_SHARED_REQUEST: 1079178354Ssam if (ni == vap->iv_bss) { 1080178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 1081178354Ssam if (ni == NULL) { 1082178354Ssam /* NB: no way to return an error */ 1083178354Ssam return; 1084178354Ssam } 1085178354Ssam allocbs = 1; 1086178354Ssam } else { 1087178354Ssam if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1088178354Ssam (void) ieee80211_ref_node(ni); 1089178354Ssam allocbs = 0; 1090178354Ssam } 1091178354Ssam /* 1092178354Ssam * Mark the node as referenced to reflect that it's 1093178354Ssam * reference count has been bumped to insure it remains 1094178354Ssam * after the transaction completes. 1095178354Ssam */ 1096178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 1097186099Ssam /* 1098186099Ssam * Mark the node as requiring a valid associatio id 1099186099Ssam * before outbound traffic is permitted. 1100186099Ssam */ 1101186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 1102178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1103192468Ssam ni->ni_noise = nf; 1104178354Ssam if (!ieee80211_alloc_challenge(ni)) { 1105178354Ssam /* NB: don't return error so they rexmit */ 1106178354Ssam return; 1107178354Ssam } 1108178354Ssam get_random_bytes(ni->ni_challenge, 1109178354Ssam IEEE80211_CHALLENGE_LEN); 1110178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1111178354Ssam ni, "shared key %sauth request", allocbs ? "" : "re"); 1112178354Ssam /* 1113178354Ssam * When the ACL policy is set to RADIUS we defer the 1114178354Ssam * authorization to a user agent. Dispatch an event, 1115178354Ssam * a subsequent MLME call will decide the fate of the 1116178354Ssam * station. If the user agent is not present then the 1117178354Ssam * node will be reclaimed due to inactivity. 1118178354Ssam */ 1119178354Ssam if (vap->iv_acl != NULL && 1120178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 1121178354Ssam IEEE80211_NOTE_MAC(vap, 1122178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, 1123178354Ssam ni->ni_macaddr, 1124178354Ssam "%s", "station authentication defered (radius acl)"); 1125178354Ssam ieee80211_notify_node_auth(ni); 1126178354Ssam return; 1127178354Ssam } 1128178354Ssam break; 1129178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1130178354Ssam if (ni == vap->iv_bss) { 1131178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1132178354Ssam ni->ni_macaddr, "shared key response", 1133178354Ssam "%s", "unknown station"); 1134178354Ssam /* NB: don't send a response */ 1135178354Ssam return; 1136178354Ssam } 1137178354Ssam if (ni->ni_challenge == NULL) { 1138178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1139178354Ssam ni->ni_macaddr, "shared key response", 1140178354Ssam "%s", "no challenge recorded"); 1141178354Ssam vap->iv_stats.is_rx_bad_auth++; 1142178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1143178354Ssam goto bad; 1144178354Ssam } 1145178354Ssam if (memcmp(ni->ni_challenge, &challenge[2], 1146178354Ssam challenge[1]) != 0) { 1147178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1148178354Ssam ni->ni_macaddr, "shared key response", 1149178354Ssam "%s", "challenge mismatch"); 1150178354Ssam vap->iv_stats.is_rx_auth_fail++; 1151178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1152178354Ssam goto bad; 1153178354Ssam } 1154178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1155178354Ssam ni, "%s", "station authenticated (shared key)"); 1156178354Ssam ieee80211_node_authorize(ni); 1157178354Ssam break; 1158178354Ssam default: 1159178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1160178354Ssam ni->ni_macaddr, "shared key auth", 1161178354Ssam "bad seq %d", seq); 1162178354Ssam vap->iv_stats.is_rx_bad_auth++; 1163178354Ssam estatus = IEEE80211_STATUS_SEQUENCE; 1164178354Ssam goto bad; 1165178354Ssam } 1166178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1167178354Ssam return; 1168178354Ssambad: 1169178354Ssam /* 1170178354Ssam * Send an error response; but only when operating as an AP. 1171178354Ssam */ 1172178354Ssam /* XXX hack to workaround calling convention */ 1173178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1174178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1175178354Ssam (seq + 1) | (estatus<<16)); 1176178354Ssam} 1177178354Ssam 1178178354Ssam/* 1179178354Ssam * Convert a WPA cipher selector OUI to an internal 1180178354Ssam * cipher algorithm. Where appropriate we also 1181178354Ssam * record any key length. 1182178354Ssam */ 1183178354Ssamstatic int 1184178354Ssamwpa_cipher(const uint8_t *sel, uint8_t *keylen) 1185178354Ssam{ 1186178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1187178354Ssam uint32_t w = LE_READ_4(sel); 1188178354Ssam 1189178354Ssam switch (w) { 1190178354Ssam case WPA_SEL(WPA_CSE_NULL): 1191178354Ssam return IEEE80211_CIPHER_NONE; 1192178354Ssam case WPA_SEL(WPA_CSE_WEP40): 1193178354Ssam if (keylen) 1194178354Ssam *keylen = 40 / NBBY; 1195178354Ssam return IEEE80211_CIPHER_WEP; 1196178354Ssam case WPA_SEL(WPA_CSE_WEP104): 1197178354Ssam if (keylen) 1198178354Ssam *keylen = 104 / NBBY; 1199178354Ssam return IEEE80211_CIPHER_WEP; 1200178354Ssam case WPA_SEL(WPA_CSE_TKIP): 1201178354Ssam return IEEE80211_CIPHER_TKIP; 1202178354Ssam case WPA_SEL(WPA_CSE_CCMP): 1203178354Ssam return IEEE80211_CIPHER_AES_CCM; 1204178354Ssam } 1205178354Ssam return 32; /* NB: so 1<< is discarded */ 1206178354Ssam#undef WPA_SEL 1207178354Ssam} 1208178354Ssam 1209178354Ssam/* 1210178354Ssam * Convert a WPA key management/authentication algorithm 1211178354Ssam * to an internal code. 1212178354Ssam */ 1213178354Ssamstatic int 1214178354Ssamwpa_keymgmt(const uint8_t *sel) 1215178354Ssam{ 1216178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1217178354Ssam uint32_t w = LE_READ_4(sel); 1218178354Ssam 1219178354Ssam switch (w) { 1220178354Ssam case WPA_SEL(WPA_ASE_8021X_UNSPEC): 1221178354Ssam return WPA_ASE_8021X_UNSPEC; 1222178354Ssam case WPA_SEL(WPA_ASE_8021X_PSK): 1223178354Ssam return WPA_ASE_8021X_PSK; 1224178354Ssam case WPA_SEL(WPA_ASE_NONE): 1225178354Ssam return WPA_ASE_NONE; 1226178354Ssam } 1227178354Ssam return 0; /* NB: so is discarded */ 1228178354Ssam#undef WPA_SEL 1229178354Ssam} 1230178354Ssam 1231178354Ssam/* 1232178354Ssam * Parse a WPA information element to collect parameters. 1233178354Ssam * Note that we do not validate security parameters; that 1234178354Ssam * is handled by the authenticator; the parsing done here 1235178354Ssam * is just for internal use in making operational decisions. 1236178354Ssam */ 1237178354Ssamstatic int 1238178354Ssamieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm, 1239178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1240178354Ssam{ 1241178354Ssam uint8_t len = frm[1]; 1242178354Ssam uint32_t w; 1243178354Ssam int n; 1244178354Ssam 1245178354Ssam /* 1246178354Ssam * Check the length once for fixed parts: OUI, type, 1247178354Ssam * version, mcast cipher, and 2 selector counts. 1248178354Ssam * Other, variable-length data, must be checked separately. 1249178354Ssam */ 1250178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) { 1251178354Ssam IEEE80211_DISCARD_IE(vap, 1252178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1253178354Ssam wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags); 1254178354Ssam return IEEE80211_REASON_IE_INVALID; 1255178354Ssam } 1256178354Ssam if (len < 14) { 1257178354Ssam IEEE80211_DISCARD_IE(vap, 1258178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1259178354Ssam wh, "WPA", "too short, len %u", len); 1260178354Ssam return IEEE80211_REASON_IE_INVALID; 1261178354Ssam } 1262178354Ssam frm += 6, len -= 4; /* NB: len is payload only */ 1263200242Srpaulo /* NB: iswpaoui already validated the OUI and type */ 1264178354Ssam w = LE_READ_2(frm); 1265178354Ssam if (w != WPA_VERSION) { 1266178354Ssam IEEE80211_DISCARD_IE(vap, 1267178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1268178354Ssam wh, "WPA", "bad version %u", w); 1269178354Ssam return IEEE80211_REASON_IE_INVALID; 1270178354Ssam } 1271178354Ssam frm += 2, len -= 2; 1272178354Ssam 1273178354Ssam memset(rsn, 0, sizeof(*rsn)); 1274178354Ssam 1275178354Ssam /* multicast/group cipher */ 1276178354Ssam rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen); 1277178354Ssam frm += 4, len -= 4; 1278178354Ssam 1279178354Ssam /* unicast ciphers */ 1280178354Ssam n = LE_READ_2(frm); 1281178354Ssam frm += 2, len -= 2; 1282178354Ssam if (len < n*4+2) { 1283178354Ssam IEEE80211_DISCARD_IE(vap, 1284178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1285178354Ssam wh, "WPA", "ucast cipher data too short; len %u, n %u", 1286178354Ssam len, n); 1287178354Ssam return IEEE80211_REASON_IE_INVALID; 1288178354Ssam } 1289178354Ssam w = 0; 1290178354Ssam for (; n > 0; n--) { 1291178354Ssam w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen); 1292178354Ssam frm += 4, len -= 4; 1293178354Ssam } 1294178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1295178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1296178354Ssam else 1297178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1298178354Ssam 1299178354Ssam /* key management algorithms */ 1300178354Ssam n = LE_READ_2(frm); 1301178354Ssam frm += 2, len -= 2; 1302178354Ssam if (len < n*4) { 1303178354Ssam IEEE80211_DISCARD_IE(vap, 1304178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1305178354Ssam wh, "WPA", "key mgmt alg data too short; len %u, n %u", 1306178354Ssam len, n); 1307178354Ssam return IEEE80211_REASON_IE_INVALID; 1308178354Ssam } 1309178354Ssam w = 0; 1310178354Ssam for (; n > 0; n--) { 1311178354Ssam w |= wpa_keymgmt(frm); 1312178354Ssam frm += 4, len -= 4; 1313178354Ssam } 1314178354Ssam if (w & WPA_ASE_8021X_UNSPEC) 1315178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC; 1316178354Ssam else 1317178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 1318178354Ssam 1319178354Ssam if (len > 2) /* optional capabilities */ 1320178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1321178354Ssam 1322178354Ssam return 0; 1323178354Ssam} 1324178354Ssam 1325178354Ssam/* 1326178354Ssam * Convert an RSN cipher selector OUI to an internal 1327178354Ssam * cipher algorithm. Where appropriate we also 1328178354Ssam * record any key length. 1329178354Ssam */ 1330178354Ssamstatic int 1331178354Ssamrsn_cipher(const uint8_t *sel, uint8_t *keylen) 1332178354Ssam{ 1333178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1334178354Ssam uint32_t w = LE_READ_4(sel); 1335178354Ssam 1336178354Ssam switch (w) { 1337178354Ssam case RSN_SEL(RSN_CSE_NULL): 1338178354Ssam return IEEE80211_CIPHER_NONE; 1339178354Ssam case RSN_SEL(RSN_CSE_WEP40): 1340178354Ssam if (keylen) 1341178354Ssam *keylen = 40 / NBBY; 1342178354Ssam return IEEE80211_CIPHER_WEP; 1343178354Ssam case RSN_SEL(RSN_CSE_WEP104): 1344178354Ssam if (keylen) 1345178354Ssam *keylen = 104 / NBBY; 1346178354Ssam return IEEE80211_CIPHER_WEP; 1347178354Ssam case RSN_SEL(RSN_CSE_TKIP): 1348178354Ssam return IEEE80211_CIPHER_TKIP; 1349178354Ssam case RSN_SEL(RSN_CSE_CCMP): 1350178354Ssam return IEEE80211_CIPHER_AES_CCM; 1351178354Ssam case RSN_SEL(RSN_CSE_WRAP): 1352178354Ssam return IEEE80211_CIPHER_AES_OCB; 1353178354Ssam } 1354178354Ssam return 32; /* NB: so 1<< is discarded */ 1355178354Ssam#undef WPA_SEL 1356178354Ssam} 1357178354Ssam 1358178354Ssam/* 1359178354Ssam * Convert an RSN key management/authentication algorithm 1360178354Ssam * to an internal code. 1361178354Ssam */ 1362178354Ssamstatic int 1363178354Ssamrsn_keymgmt(const uint8_t *sel) 1364178354Ssam{ 1365178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1366178354Ssam uint32_t w = LE_READ_4(sel); 1367178354Ssam 1368178354Ssam switch (w) { 1369178354Ssam case RSN_SEL(RSN_ASE_8021X_UNSPEC): 1370178354Ssam return RSN_ASE_8021X_UNSPEC; 1371178354Ssam case RSN_SEL(RSN_ASE_8021X_PSK): 1372178354Ssam return RSN_ASE_8021X_PSK; 1373178354Ssam case RSN_SEL(RSN_ASE_NONE): 1374178354Ssam return RSN_ASE_NONE; 1375178354Ssam } 1376178354Ssam return 0; /* NB: so is discarded */ 1377178354Ssam#undef RSN_SEL 1378178354Ssam} 1379178354Ssam 1380178354Ssam/* 1381178354Ssam * Parse a WPA/RSN information element to collect parameters 1382178354Ssam * and validate the parameters against what has been 1383178354Ssam * configured for the system. 1384178354Ssam */ 1385178354Ssamstatic int 1386178354Ssamieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm, 1387178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1388178354Ssam{ 1389178354Ssam uint8_t len = frm[1]; 1390178354Ssam uint32_t w; 1391178354Ssam int n; 1392178354Ssam 1393178354Ssam /* 1394178354Ssam * Check the length once for fixed parts: 1395178354Ssam * version, mcast cipher, and 2 selector counts. 1396178354Ssam * Other, variable-length data, must be checked separately. 1397178354Ssam */ 1398178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) { 1399178354Ssam IEEE80211_DISCARD_IE(vap, 1400178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1401178354Ssam wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags); 1402178354Ssam return IEEE80211_REASON_IE_INVALID; 1403178354Ssam } 1404178354Ssam if (len < 10) { 1405178354Ssam IEEE80211_DISCARD_IE(vap, 1406178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1407178354Ssam wh, "RSN", "too short, len %u", len); 1408178354Ssam return IEEE80211_REASON_IE_INVALID; 1409178354Ssam } 1410178354Ssam frm += 2; 1411178354Ssam w = LE_READ_2(frm); 1412178354Ssam if (w != RSN_VERSION) { 1413178354Ssam IEEE80211_DISCARD_IE(vap, 1414178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1415178354Ssam wh, "RSN", "bad version %u", w); 1416178354Ssam return IEEE80211_REASON_IE_INVALID; 1417178354Ssam } 1418178354Ssam frm += 2, len -= 2; 1419178354Ssam 1420178354Ssam memset(rsn, 0, sizeof(*rsn)); 1421178354Ssam 1422178354Ssam /* multicast/group cipher */ 1423178354Ssam rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen); 1424178354Ssam frm += 4, len -= 4; 1425178354Ssam 1426178354Ssam /* unicast ciphers */ 1427178354Ssam n = LE_READ_2(frm); 1428178354Ssam frm += 2, len -= 2; 1429178354Ssam if (len < n*4+2) { 1430178354Ssam IEEE80211_DISCARD_IE(vap, 1431178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1432178354Ssam wh, "RSN", "ucast cipher data too short; len %u, n %u", 1433178354Ssam len, n); 1434178354Ssam return IEEE80211_REASON_IE_INVALID; 1435178354Ssam } 1436178354Ssam w = 0; 1437178354Ssam for (; n > 0; n--) { 1438178354Ssam w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen); 1439178354Ssam frm += 4, len -= 4; 1440178354Ssam } 1441178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1442178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1443178354Ssam else 1444178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1445178354Ssam 1446178354Ssam /* key management algorithms */ 1447178354Ssam n = LE_READ_2(frm); 1448178354Ssam frm += 2, len -= 2; 1449178354Ssam if (len < n*4) { 1450178354Ssam IEEE80211_DISCARD_IE(vap, 1451178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1452178354Ssam wh, "RSN", "key mgmt alg data too short; len %u, n %u", 1453178354Ssam len, n); 1454178354Ssam return IEEE80211_REASON_IE_INVALID; 1455178354Ssam } 1456178354Ssam w = 0; 1457178354Ssam for (; n > 0; n--) { 1458178354Ssam w |= rsn_keymgmt(frm); 1459178354Ssam frm += 4, len -= 4; 1460178354Ssam } 1461178354Ssam if (w & RSN_ASE_8021X_UNSPEC) 1462178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC; 1463178354Ssam else 1464178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_PSK; 1465178354Ssam 1466178354Ssam /* optional RSN capabilities */ 1467178354Ssam if (len > 2) 1468178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1469178354Ssam /* XXXPMKID */ 1470178354Ssam 1471178354Ssam return 0; 1472178354Ssam} 1473178354Ssam 1474178354Ssam/* 1475178354Ssam * WPA/802.11i assocation request processing. 1476178354Ssam */ 1477178354Ssamstatic int 1478178354Ssamwpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms, 1479178354Ssam const struct ieee80211_frame *wh, const uint8_t *wpa, 1480178354Ssam const uint8_t *rsn, uint16_t capinfo) 1481178354Ssam{ 1482178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1483178354Ssam uint8_t reason; 1484178354Ssam int badwparsn; 1485178354Ssam 1486178354Ssam ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN); 1487178354Ssam if (wpa == NULL && rsn == NULL) { 1488178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) { 1489178354Ssam /* 1490178354Ssam * W-Fi Protected Setup (WPS) permits 1491178354Ssam * clients to associate and pass EAPOL frames 1492178354Ssam * to establish initial credentials. 1493178354Ssam */ 1494178354Ssam ni->ni_flags |= IEEE80211_NODE_WPS; 1495178354Ssam return 1; 1496178354Ssam } 1497178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) && 1498178354Ssam (capinfo & IEEE80211_CAPINFO_PRIVACY)) { 1499178354Ssam /* 1500178354Ssam * Transitional Security Network. Permits clients 1501178354Ssam * to associate and use WEP while WPA is configured. 1502178354Ssam */ 1503178354Ssam ni->ni_flags |= IEEE80211_NODE_TSN; 1504178354Ssam return 1; 1505178354Ssam } 1506178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1507178354Ssam wh, NULL, "%s", "no WPA/RSN IE in association request"); 1508178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1509178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1510178354Ssam goto bad; 1511178354Ssam } 1512178354Ssam /* assert right association security credentials */ 1513178354Ssam badwparsn = 0; /* NB: to silence compiler */ 1514178354Ssam switch (vap->iv_flags & IEEE80211_F_WPA) { 1515178354Ssam case IEEE80211_F_WPA1: 1516178354Ssam badwparsn = (wpa == NULL); 1517178354Ssam break; 1518178354Ssam case IEEE80211_F_WPA2: 1519178354Ssam badwparsn = (rsn == NULL); 1520178354Ssam break; 1521178354Ssam case IEEE80211_F_WPA1|IEEE80211_F_WPA2: 1522178354Ssam badwparsn = (wpa == NULL && rsn == NULL); 1523178354Ssam break; 1524178354Ssam } 1525178354Ssam if (badwparsn) { 1526178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1527178354Ssam wh, NULL, 1528178354Ssam "%s", "missing WPA/RSN IE in association request"); 1529178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1530178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1531178354Ssam goto bad; 1532178354Ssam } 1533178354Ssam /* 1534178354Ssam * Parse WPA/RSN information element. 1535178354Ssam */ 1536178354Ssam if (wpa != NULL) 1537178354Ssam reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh); 1538178354Ssam else 1539178354Ssam reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh); 1540178354Ssam if (reason != 0) { 1541178354Ssam /* XXX distinguish WPA/RSN? */ 1542178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1543178354Ssam goto bad; 1544178354Ssam } 1545178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni, 1546178354Ssam "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x", 1547178354Ssam wpa != NULL ? "WPA" : "RSN", 1548178354Ssam rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen, 1549178354Ssam rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen, 1550178354Ssam rsnparms->rsn_keymgmt, rsnparms->rsn_caps); 1551178354Ssam 1552178354Ssam return 1; 1553178354Ssambad: 1554178354Ssam ieee80211_node_deauth(ni, reason); 1555178354Ssam return 0; 1556178354Ssam} 1557178354Ssam 1558178354Ssam/* XXX find a better place for definition */ 1559178354Ssamstruct l2_update_frame { 1560178354Ssam struct ether_header eh; 1561178354Ssam uint8_t dsap; 1562178354Ssam uint8_t ssap; 1563178354Ssam uint8_t control; 1564178354Ssam uint8_t xid[3]; 1565178354Ssam} __packed; 1566178354Ssam 1567178354Ssam/* 1568178354Ssam * Deliver a TGf L2UF frame on behalf of a station. 1569178354Ssam * This primes any bridge when the station is roaming 1570178354Ssam * between ap's on the same wired network. 1571178354Ssam */ 1572178354Ssamstatic void 1573178354Ssamieee80211_deliver_l2uf(struct ieee80211_node *ni) 1574178354Ssam{ 1575178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1576178354Ssam struct ifnet *ifp = vap->iv_ifp; 1577178354Ssam struct mbuf *m; 1578178354Ssam struct l2_update_frame *l2uf; 1579178354Ssam struct ether_header *eh; 1580178354Ssam 1581178354Ssam m = m_gethdr(M_NOWAIT, MT_DATA); 1582178354Ssam if (m == NULL) { 1583178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1584178354Ssam "%s", "no mbuf for l2uf frame"); 1585178354Ssam vap->iv_stats.is_rx_nobuf++; /* XXX not right */ 1586178354Ssam return; 1587178354Ssam } 1588178354Ssam l2uf = mtod(m, struct l2_update_frame *); 1589178354Ssam eh = &l2uf->eh; 1590178354Ssam /* dst: Broadcast address */ 1591178354Ssam IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr); 1592178354Ssam /* src: associated STA */ 1593178354Ssam IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr); 1594178354Ssam eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh)); 1595178354Ssam 1596178354Ssam l2uf->dsap = 0; 1597178354Ssam l2uf->ssap = 0; 1598178354Ssam l2uf->control = 0xf5; 1599178354Ssam l2uf->xid[0] = 0x81; 1600178354Ssam l2uf->xid[1] = 0x80; 1601178354Ssam l2uf->xid[2] = 0x00; 1602178354Ssam 1603178354Ssam m->m_pkthdr.len = m->m_len = sizeof(*l2uf); 1604178354Ssam hostap_deliver_data(vap, ni, m); 1605178354Ssam} 1606178354Ssam 1607178354Ssamstatic void 1608178354Ssamratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1609178354Ssam int reassoc, int resp, const char *tag, int rate) 1610178354Ssam{ 1611178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1612178354Ssam "deny %s request, %s rate set mismatch, rate/MCS %d", 1613178354Ssam reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL); 1614178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE); 1615178354Ssam ieee80211_node_leave(ni); 1616178354Ssam} 1617178354Ssam 1618178354Ssamstatic void 1619178354Ssamcapinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1620178354Ssam int reassoc, int resp, const char *tag, int capinfo) 1621178354Ssam{ 1622178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1623178354Ssam 1624178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1625178354Ssam "deny %s request, %s mismatch 0x%x", 1626178354Ssam reassoc ? "reassoc" : "assoc", tag, capinfo); 1627178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO); 1628178354Ssam ieee80211_node_leave(ni); 1629178354Ssam vap->iv_stats.is_rx_assoc_capmismatch++; 1630178354Ssam} 1631178354Ssam 1632178354Ssamstatic void 1633178354Ssamhtcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1634178354Ssam int reassoc, int resp) 1635178354Ssam{ 1636178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1637178354Ssam "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc"); 1638178354Ssam /* XXX no better code */ 1639193543Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS); 1640178354Ssam ieee80211_node_leave(ni); 1641178354Ssam} 1642178354Ssam 1643178354Ssamstatic void 1644178354Ssamauthalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1645178354Ssam int algo, int seq, int status) 1646178354Ssam{ 1647178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1648178354Ssam 1649178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1650178354Ssam wh, NULL, "unsupported alg %d", algo); 1651178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1652178354Ssam ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, 1653178354Ssam seq | (status << 16)); 1654178354Ssam} 1655178354Ssam 1656178354Ssamstatic __inline int 1657178354Ssamishtmixed(const uint8_t *ie) 1658178354Ssam{ 1659178354Ssam const struct ieee80211_ie_htinfo *ht = 1660178354Ssam (const struct ieee80211_ie_htinfo *) ie; 1661178354Ssam return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) == 1662178354Ssam IEEE80211_HTINFO_OPMODE_MIXED; 1663178354Ssam} 1664178354Ssam 1665178354Ssamstatic int 1666178354Ssamis11bclient(const uint8_t *rates, const uint8_t *xrates) 1667178354Ssam{ 1668178354Ssam static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); 1669178354Ssam int i; 1670178354Ssam 1671178354Ssam /* NB: the 11b clients we care about will not have xrates */ 1672178354Ssam if (xrates != NULL || rates == NULL) 1673178354Ssam return 0; 1674178354Ssam for (i = 0; i < rates[1]; i++) { 1675178354Ssam int r = rates[2+i] & IEEE80211_RATE_VAL; 1676178354Ssam if (r > 2*11 || ((1<<r) & brates) == 0) 1677178354Ssam return 0; 1678178354Ssam } 1679178354Ssam return 1; 1680178354Ssam} 1681178354Ssam 1682178354Ssamstatic void 1683178354Ssamhostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1684192468Ssam int subtype, int rssi, int nf) 1685178354Ssam{ 1686178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1687178354Ssam struct ieee80211com *ic = ni->ni_ic; 1688178354Ssam struct ieee80211_frame *wh; 1689178354Ssam uint8_t *frm, *efrm, *sfrm; 1690178354Ssam uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap; 1691178354Ssam int reassoc, resp; 1692178354Ssam uint8_t rate; 1693178354Ssam 1694178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1695178354Ssam frm = (uint8_t *)&wh[1]; 1696178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1697178354Ssam switch (subtype) { 1698178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1699178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1700178354Ssam struct ieee80211_scanparams scan; 1701178354Ssam /* 1702178354Ssam * We process beacon/probe response frames when scanning; 1703178354Ssam * otherwise we check beacon frames for overlapping non-ERP 1704178354Ssam * BSS in 11g and/or overlapping legacy BSS when in HT. 1705178354Ssam */ 1706178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 && 1707178354Ssam subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1708178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1709178354Ssam return; 1710178354Ssam } 1711178354Ssam /* NB: accept off-channel frames */ 1712178354Ssam if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN) 1713178354Ssam return; 1714178354Ssam /* 1715178354Ssam * Count frame now that we know it's to be processed. 1716178354Ssam */ 1717178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1718178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1719178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1720178354Ssam } else 1721178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1722178354Ssam /* 1723178354Ssam * If scanning, just pass information to the scan module. 1724178354Ssam */ 1725178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1726178354Ssam if (scan.status == 0 && /* NB: on channel */ 1727178354Ssam (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) { 1728178354Ssam /* 1729178354Ssam * Actively scanning a channel marked passive; 1730178354Ssam * send a probe request now that we know there 1731178354Ssam * is 802.11 traffic present. 1732178354Ssam * 1733178354Ssam * XXX check if the beacon we recv'd gives 1734178354Ssam * us what we need and suppress the probe req 1735178354Ssam */ 1736178354Ssam ieee80211_probe_curchan(vap, 1); 1737178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1738178354Ssam } 1739192468Ssam ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf); 1740178354Ssam return; 1741178354Ssam } 1742178354Ssam /* 1743178354Ssam * Check beacon for overlapping bss w/ non ERP stations. 1744178354Ssam * If we detect one and protection is configured but not 1745178354Ssam * enabled, enable it and start a timer that'll bring us 1746178354Ssam * out if we stop seeing the bss. 1747178354Ssam */ 1748178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1749178354Ssam scan.status == 0 && /* NB: on-channel */ 1750178354Ssam ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/ 1751178354Ssam (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) { 1752178354Ssam ic->ic_lastnonerp = ticks; 1753178354Ssam ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR; 1754178354Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE && 1755178354Ssam (ic->ic_flags & IEEE80211_F_USEPROT) == 0) { 1756178354Ssam IEEE80211_NOTE_FRAME(vap, 1757178354Ssam IEEE80211_MSG_ASSOC, wh, 1758178354Ssam "non-ERP present on channel %d " 1759178354Ssam "(saw erp 0x%x from channel %d), " 1760178354Ssam "enable use of protection", 1761178354Ssam ic->ic_curchan->ic_ieee, 1762178354Ssam scan.erp, scan.chan); 1763178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1764178354Ssam ieee80211_notify_erp(ic); 1765178354Ssam } 1766178354Ssam } 1767178354Ssam /* 1768178354Ssam * Check beacon for non-HT station on HT channel 1769178354Ssam * and update HT BSS occupancy as appropriate. 1770178354Ssam */ 1771178354Ssam if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) { 1772178354Ssam if (scan.status & IEEE80211_BPARSE_OFFCHAN) { 1773178354Ssam /* 1774178354Ssam * Off control channel; only check frames 1775178354Ssam * that come in the extension channel when 1776178354Ssam * operating w/ HT40. 1777178354Ssam */ 1778178354Ssam if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) 1779178354Ssam break; 1780178354Ssam if (scan.chan != ic->ic_curchan->ic_extieee) 1781178354Ssam break; 1782178354Ssam } 1783178354Ssam if (scan.htinfo == NULL) { 1784178354Ssam ieee80211_htprot_update(ic, 1785178354Ssam IEEE80211_HTINFO_OPMODE_PROTOPT | 1786178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1787178354Ssam } else if (ishtmixed(scan.htinfo)) { 1788178354Ssam /* XXX? take NONHT_PRESENT from beacon? */ 1789178354Ssam ieee80211_htprot_update(ic, 1790178354Ssam IEEE80211_HTINFO_OPMODE_MIXED | 1791178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1792178354Ssam } 1793178354Ssam } 1794178354Ssam break; 1795178354Ssam } 1796178354Ssam 1797178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1798178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1799178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1800178354Ssam return; 1801178354Ssam } 1802178354Ssam /* 1803228514Sadrian * Consult the ACL policy module if setup. 1804228514Sadrian */ 1805228622Sbschmidt if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1806228514Sadrian IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1807228514Sadrian wh, NULL, "%s", "disallowed by ACL"); 1808228514Sadrian vap->iv_stats.is_rx_acl++; 1809228514Sadrian return; 1810228514Sadrian } 1811228514Sadrian /* 1812178354Ssam * prreq frame format 1813178354Ssam * [tlv] ssid 1814178354Ssam * [tlv] supported rates 1815178354Ssam * [tlv] extended supported rates 1816178354Ssam */ 1817178354Ssam ssid = rates = xrates = NULL; 1818178354Ssam sfrm = frm; 1819178354Ssam while (efrm - frm > 1) { 1820178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1821178354Ssam switch (*frm) { 1822178354Ssam case IEEE80211_ELEMID_SSID: 1823178354Ssam ssid = frm; 1824178354Ssam break; 1825178354Ssam case IEEE80211_ELEMID_RATES: 1826178354Ssam rates = frm; 1827178354Ssam break; 1828178354Ssam case IEEE80211_ELEMID_XRATES: 1829178354Ssam xrates = frm; 1830178354Ssam break; 1831178354Ssam } 1832178354Ssam frm += frm[1] + 2; 1833178354Ssam } 1834178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1835178354Ssam if (xrates != NULL) 1836178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1837178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1838178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1839178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1840178354Ssam if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { 1841178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1842178354Ssam wh, NULL, 1843178354Ssam "%s", "no ssid with ssid suppression enabled"); 1844178354Ssam vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ 1845178354Ssam return; 1846178354Ssam } 1847178354Ssam 1848178354Ssam /* XXX find a better class or define it's own */ 1849178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1850178354Ssam "%s", "recv probe req"); 1851178354Ssam /* 1852178354Ssam * Some legacy 11b clients cannot hack a complete 1853178354Ssam * probe response frame. When the request includes 1854178354Ssam * only a bare-bones rate set, communicate this to 1855178354Ssam * the transmit side. 1856178354Ssam */ 1857178354Ssam ieee80211_send_proberesp(vap, wh->i_addr2, 1858178354Ssam is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); 1859178354Ssam break; 1860178354Ssam 1861178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1862178354Ssam uint16_t algo, seq, status; 1863178354Ssam 1864178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1865178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1866178354Ssam return; 1867178354Ssam } 1868178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1869178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1870178354Ssam wh, NULL, "%s", "wrong bssid"); 1871178354Ssam vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/ 1872178354Ssam return; 1873178354Ssam } 1874178354Ssam /* 1875178354Ssam * auth frame format 1876178354Ssam * [2] algorithm 1877178354Ssam * [2] sequence 1878178354Ssam * [2] status 1879178354Ssam * [tlv*] challenge 1880178354Ssam */ 1881178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1882178354Ssam algo = le16toh(*(uint16_t *)frm); 1883178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1884178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1885178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1886178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1887178354Ssam /* 1888178354Ssam * Consult the ACL policy module if setup. 1889178354Ssam */ 1890228622Sbschmidt if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1891178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1892178354Ssam wh, NULL, "%s", "disallowed by ACL"); 1893178354Ssam vap->iv_stats.is_rx_acl++; 1894178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1895178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1896178354Ssam (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16)); 1897178354Ssam return; 1898178354Ssam } 1899178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1900178354Ssam IEEE80211_DISCARD(vap, 1901178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1902178354Ssam wh, NULL, "%s", "TKIP countermeasures enabled"); 1903178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1904178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1905178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1906178354Ssam IEEE80211_REASON_MIC_FAILURE); 1907178354Ssam return; 1908178354Ssam } 1909178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1910192468Ssam hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1911192468Ssam seq, status); 1912178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1913192468Ssam hostap_auth_open(ni, wh, rssi, nf, seq, status); 1914178354Ssam else if (algo == IEEE80211_AUTH_ALG_LEAP) { 1915178354Ssam authalgreject(ni, wh, algo, 1916178354Ssam seq+1, IEEE80211_STATUS_ALG); 1917178354Ssam return; 1918178354Ssam } else { 1919178354Ssam /* 1920178354Ssam * We assume that an unknown algorithm is the result 1921178354Ssam * of a decryption failure on a shared key auth frame; 1922178354Ssam * return a status code appropriate for that instead 1923178354Ssam * of IEEE80211_STATUS_ALG. 1924178354Ssam * 1925178354Ssam * NB: a seq# of 4 is intentional; the decrypted 1926178354Ssam * frame likely has a bogus seq value. 1927178354Ssam */ 1928178354Ssam authalgreject(ni, wh, algo, 1929178354Ssam 4, IEEE80211_STATUS_CHALLENGE); 1930178354Ssam return; 1931178354Ssam } 1932178354Ssam break; 1933178354Ssam } 1934178354Ssam 1935178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1936178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { 1937178354Ssam uint16_t capinfo, lintval; 1938178354Ssam struct ieee80211_rsnparms rsnparms; 1939178354Ssam 1940178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1941178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1942178354Ssam return; 1943178354Ssam } 1944178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1945178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1946178354Ssam wh, NULL, "%s", "wrong bssid"); 1947178354Ssam vap->iv_stats.is_rx_assoc_bss++; 1948178354Ssam return; 1949178354Ssam } 1950178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 1951178354Ssam reassoc = 1; 1952178354Ssam resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; 1953178354Ssam } else { 1954178354Ssam reassoc = 0; 1955178354Ssam resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; 1956178354Ssam } 1957178354Ssam if (ni == vap->iv_bss) { 1958178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1959178354Ssam "deny %s request, sta not authenticated", 1960178354Ssam reassoc ? "reassoc" : "assoc"); 1961178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1962178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1963178354Ssam IEEE80211_REASON_ASSOC_NOT_AUTHED); 1964178354Ssam vap->iv_stats.is_rx_assoc_notauth++; 1965178354Ssam return; 1966178354Ssam } 1967178354Ssam 1968178354Ssam /* 1969178354Ssam * asreq frame format 1970178354Ssam * [2] capability information 1971178354Ssam * [2] listen interval 1972178354Ssam * [6*] current AP address (reassoc only) 1973178354Ssam * [tlv] ssid 1974178354Ssam * [tlv] supported rates 1975178354Ssam * [tlv] extended supported rates 1976178354Ssam * [tlv] WPA or RSN 1977178354Ssam * [tlv] HT capabilities 1978178354Ssam * [tlv] Atheros capabilities 1979178354Ssam */ 1980178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return); 1981178354Ssam capinfo = le16toh(*(uint16_t *)frm); frm += 2; 1982178354Ssam lintval = le16toh(*(uint16_t *)frm); frm += 2; 1983178354Ssam if (reassoc) 1984178354Ssam frm += 6; /* ignore current AP info */ 1985178354Ssam ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL; 1986178354Ssam sfrm = frm; 1987178354Ssam while (efrm - frm > 1) { 1988178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1989178354Ssam switch (*frm) { 1990178354Ssam case IEEE80211_ELEMID_SSID: 1991178354Ssam ssid = frm; 1992178354Ssam break; 1993178354Ssam case IEEE80211_ELEMID_RATES: 1994178354Ssam rates = frm; 1995178354Ssam break; 1996178354Ssam case IEEE80211_ELEMID_XRATES: 1997178354Ssam xrates = frm; 1998178354Ssam break; 1999178354Ssam case IEEE80211_ELEMID_RSN: 2000178354Ssam rsn = frm; 2001178354Ssam break; 2002178354Ssam case IEEE80211_ELEMID_HTCAP: 2003178354Ssam htcap = frm; 2004178354Ssam break; 2005178354Ssam case IEEE80211_ELEMID_VENDOR: 2006178354Ssam if (iswpaoui(frm)) 2007178354Ssam wpa = frm; 2008178354Ssam else if (iswmeinfo(frm)) 2009178354Ssam wme = frm; 2010190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2011178354Ssam else if (isatherosoui(frm)) 2012178354Ssam ath = frm; 2013190391Ssam#endif 2014193655Ssam else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 2015178354Ssam if (ishtcapoui(frm) && htcap == NULL) 2016178354Ssam htcap = frm; 2017178354Ssam } 2018178354Ssam break; 2019178354Ssam } 2020178354Ssam frm += frm[1] + 2; 2021178354Ssam } 2022178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2023178354Ssam if (xrates != NULL) 2024178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 2025178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 2026178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2027178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 2028178354Ssam if (htcap != NULL) { 2029178354Ssam IEEE80211_VERIFY_LENGTH(htcap[1], 2030178354Ssam htcap[0] == IEEE80211_ELEMID_VENDOR ? 2031178354Ssam 4 + sizeof(struct ieee80211_ie_htcap)-2 : 2032178354Ssam sizeof(struct ieee80211_ie_htcap)-2, 2033178354Ssam return); /* XXX just NULL out? */ 2034178354Ssam } 2035178354Ssam 2036178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA) && 2037178354Ssam !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo)) 2038178354Ssam return; 2039178354Ssam /* discard challenge after association */ 2040178354Ssam if (ni->ni_challenge != NULL) { 2041186302Ssam free(ni->ni_challenge, M_80211_NODE); 2042178354Ssam ni->ni_challenge = NULL; 2043178354Ssam } 2044178354Ssam /* NB: 802.11 spec says to ignore station's privacy bit */ 2045178354Ssam if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) { 2046178354Ssam capinfomismatch(ni, wh, reassoc, resp, 2047178354Ssam "capability", capinfo); 2048178354Ssam return; 2049178354Ssam } 2050178354Ssam /* 2051178354Ssam * Disallow re-associate w/ invalid slot time setting. 2052178354Ssam */ 2053178354Ssam if (ni->ni_associd != 0 && 2054178354Ssam IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2055178354Ssam ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) { 2056178354Ssam capinfomismatch(ni, wh, reassoc, resp, 2057178354Ssam "slot time", capinfo); 2058178354Ssam return; 2059178354Ssam } 2060178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 2061178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 2062178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2063178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2064178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate); 2065178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2066178354Ssam return; 2067178354Ssam } 2068178354Ssam /* 2069178354Ssam * If constrained to 11g-only stations reject an 2070178354Ssam * 11b-only station. We cheat a bit here by looking 2071178354Ssam * at the max negotiated xmit rate and assuming anyone 2072178354Ssam * with a best rate <24Mb/s is an 11b station. 2073178354Ssam */ 2074178354Ssam if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) { 2075178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "11g", rate); 2076178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2077178354Ssam return; 2078178354Ssam } 2079178354Ssam /* 2080178354Ssam * Do HT rate set handling and setup HT node state. 2081178354Ssam */ 2082178354Ssam ni->ni_chan = vap->iv_bss->ni_chan; 2083178354Ssam if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { 2084178354Ssam rate = ieee80211_setup_htrates(ni, htcap, 2085178354Ssam IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO | 2086178354Ssam IEEE80211_F_DOBRS); 2087178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2088178354Ssam ratesetmismatch(ni, wh, reassoc, resp, 2089178354Ssam "HT", rate); 2090178354Ssam vap->iv_stats.is_ht_assoc_norate++; 2091178354Ssam return; 2092178354Ssam } 2093183254Ssam ieee80211_ht_node_init(ni); 2094183254Ssam ieee80211_ht_updatehtcap(ni, htcap); 2095178354Ssam } else if (ni->ni_flags & IEEE80211_NODE_HT) 2096178354Ssam ieee80211_ht_node_cleanup(ni); 2097190579Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2098190579Ssam else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 2099190579Ssam ieee80211_ff_node_cleanup(ni); 2100190579Ssam#endif 2101178354Ssam /* 2102178354Ssam * Allow AMPDU operation only with unencrypted traffic 2103178354Ssam * or AES-CCM; the 11n spec only specifies these ciphers 2104178354Ssam * so permitting any others is undefined and can lead 2105178354Ssam * to interoperability problems. 2106178354Ssam */ 2107178354Ssam if ((ni->ni_flags & IEEE80211_NODE_HT) && 2108178354Ssam (((vap->iv_flags & IEEE80211_F_WPA) && 2109178354Ssam rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) || 2110178354Ssam (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) { 2111178354Ssam IEEE80211_NOTE(vap, 2112178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 2113178354Ssam "disallow HT use because WEP or TKIP requested, " 2114178354Ssam "capinfo 0x%x ucastcipher %d", capinfo, 2115178354Ssam rsnparms.rsn_ucastcipher); 2116178354Ssam ieee80211_ht_node_cleanup(ni); 2117178354Ssam vap->iv_stats.is_ht_assoc_downgrade++; 2118178354Ssam } 2119178354Ssam /* 2120178354Ssam * If constrained to 11n-only stations reject legacy stations. 2121178354Ssam */ 2122193655Ssam if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) && 2123178354Ssam (ni->ni_flags & IEEE80211_NODE_HT) == 0) { 2124178354Ssam htcapmismatch(ni, wh, reassoc, resp); 2125178354Ssam vap->iv_stats.is_ht_assoc_nohtcap++; 2126178354Ssam return; 2127178354Ssam } 2128178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 2129192468Ssam ni->ni_noise = nf; 2130178354Ssam ni->ni_intval = lintval; 2131178354Ssam ni->ni_capinfo = capinfo; 2132178354Ssam ni->ni_fhdwell = vap->iv_bss->ni_fhdwell; 2133178354Ssam ni->ni_fhindex = vap->iv_bss->ni_fhindex; 2134178354Ssam /* 2135178354Ssam * Store the IEs. 2136178354Ssam * XXX maybe better to just expand 2137178354Ssam */ 2138178354Ssam if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) { 2139178354Ssam#define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off) 2140178354Ssam if (wpa != NULL) 2141178354Ssam setie(wpa_ie, wpa - sfrm); 2142178354Ssam if (rsn != NULL) 2143178354Ssam setie(rsn_ie, rsn - sfrm); 2144178354Ssam if (htcap != NULL) 2145178354Ssam setie(htcap_ie, htcap - sfrm); 2146178354Ssam if (wme != NULL) { 2147178354Ssam setie(wme_ie, wme - sfrm); 2148178354Ssam /* 2149178354Ssam * Mark node as capable of QoS. 2150178354Ssam */ 2151178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 2152178354Ssam } else 2153178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2154190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2155178354Ssam if (ath != NULL) { 2156178354Ssam setie(ath_ie, ath - sfrm); 2157178354Ssam /* 2158178354Ssam * Parse ATH station parameters. 2159178354Ssam */ 2160178354Ssam ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 2161178354Ssam } else 2162190391Ssam#endif 2163178354Ssam ni->ni_ath_flags = 0; 2164178354Ssam#undef setie 2165178354Ssam } else { 2166178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2167178354Ssam ni->ni_ath_flags = 0; 2168178354Ssam } 2169178354Ssam ieee80211_node_join(ni, resp); 2170178354Ssam ieee80211_deliver_l2uf(ni); 2171178354Ssam break; 2172178354Ssam } 2173178354Ssam 2174178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 2175178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 2176178354Ssam uint16_t reason; 2177178354Ssam 2178178354Ssam if (vap->iv_state != IEEE80211_S_RUN || 2179178354Ssam /* NB: can happen when in promiscuous mode */ 2180178354Ssam !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 2181178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2182178354Ssam break; 2183178354Ssam } 2184178354Ssam /* 2185178354Ssam * deauth/disassoc frame format 2186178354Ssam * [2] reason 2187178354Ssam */ 2188178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 2189178354Ssam reason = le16toh(*(uint16_t *)frm); 2190178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) { 2191178354Ssam vap->iv_stats.is_rx_deauth++; 2192178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 2193178354Ssam } else { 2194178354Ssam vap->iv_stats.is_rx_disassoc++; 2195178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 2196178354Ssam } 2197178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2198178354Ssam "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >> 2199178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], reason); 2200178354Ssam if (ni != vap->iv_bss) 2201178354Ssam ieee80211_node_leave(ni); 2202178354Ssam break; 2203178354Ssam } 2204178354Ssam 2205178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 2206218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2207218958Sbschmidt if (ni == vap->iv_bss) { 2208218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2209218958Sbschmidt wh, NULL, "%s", "unknown node"); 2210218958Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 2211218958Sbschmidt } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2212218958Sbschmidt !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2213218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2214218958Sbschmidt wh, NULL, "%s", "not for us"); 2215218958Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 2216218958Sbschmidt } else if (vap->iv_state != IEEE80211_S_RUN) { 2217218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2218218927Sbschmidt wh, NULL, "wrong state %s", 2219218927Sbschmidt ieee80211_state_name[vap->iv_state]); 2220178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2221218958Sbschmidt } else { 2222218958Sbschmidt if (ieee80211_parse_action(ni, m0) == 0) 2223218958Sbschmidt (void)ic->ic_recv_action(ni, wh, frm, efrm); 2224218927Sbschmidt } 2225178354Ssam break; 2226178354Ssam 2227178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2228178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2229218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ATIM: 2230218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2231218927Sbschmidt wh, NULL, "%s", "not handled"); 2232218927Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 2233218927Sbschmidt break; 2234218927Sbschmidt 2235178354Ssam default: 2236178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2237218927Sbschmidt wh, "mgt", "subtype 0x%x not handled", subtype); 2238178354Ssam vap->iv_stats.is_rx_badsubtype++; 2239178354Ssam break; 2240178354Ssam } 2241178354Ssam} 2242178354Ssam 2243191546Ssamstatic void 2244191546Ssamhostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2245191546Ssam{ 2246191546Ssam switch (subtype) { 2247191546Ssam case IEEE80211_FC0_SUBTYPE_PS_POLL: 2248241138Sadrian ni->ni_vap->iv_recv_pspoll(ni, m); 2249191546Ssam break; 2250191546Ssam case IEEE80211_FC0_SUBTYPE_BAR: 2251191546Ssam ieee80211_recv_bar(ni, m); 2252191546Ssam break; 2253191546Ssam } 2254191546Ssam} 2255191546Ssam 2256178354Ssam/* 2257178354Ssam * Process a received ps-poll frame. 2258178354Ssam */ 2259241138Sadrianvoid 2260241138Sadrianieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) 2261178354Ssam{ 2262178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2263248069Sadrian struct ieee80211com *ic = vap->iv_ic; 2264178354Ssam struct ieee80211_frame_min *wh; 2265178354Ssam struct mbuf *m; 2266178354Ssam uint16_t aid; 2267178354Ssam int qlen; 2268178354Ssam 2269178354Ssam wh = mtod(m0, struct ieee80211_frame_min *); 2270178354Ssam if (ni->ni_associd == 0) { 2271178354Ssam IEEE80211_DISCARD(vap, 2272178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2273178354Ssam (struct ieee80211_frame *) wh, NULL, 2274178354Ssam "%s", "unassociated station"); 2275178354Ssam vap->iv_stats.is_ps_unassoc++; 2276178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, 2277178354Ssam IEEE80211_REASON_NOT_ASSOCED); 2278178354Ssam return; 2279178354Ssam } 2280178354Ssam 2281178354Ssam aid = le16toh(*(uint16_t *)wh->i_dur); 2282178354Ssam if (aid != ni->ni_associd) { 2283178354Ssam IEEE80211_DISCARD(vap, 2284178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2285178354Ssam (struct ieee80211_frame *) wh, NULL, 2286178354Ssam "aid mismatch: sta aid 0x%x poll aid 0x%x", 2287178354Ssam ni->ni_associd, aid); 2288178354Ssam vap->iv_stats.is_ps_badaid++; 2289180837Ssam /* 2290180837Ssam * NB: We used to deauth the station but it turns out 2291180837Ssam * the Blackberry Curve 8230 (and perhaps other devices) 2292180837Ssam * sometimes send the wrong AID when WME is negotiated. 2293180837Ssam * Being more lenient here seems ok as we already check 2294180837Ssam * the station is associated and we only return frames 2295180837Ssam * queued for the station (i.e. we don't use the AID). 2296180837Ssam */ 2297178354Ssam return; 2298178354Ssam } 2299178354Ssam 2300178354Ssam /* Okay, take the first queued packet and put it out... */ 2301184288Ssam m = ieee80211_node_psq_dequeue(ni, &qlen); 2302178354Ssam if (m == NULL) { 2303178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, 2304178354Ssam "%s", "recv ps-poll, but queue empty"); 2305178354Ssam ieee80211_send_nulldata(ieee80211_ref_node(ni)); 2306178354Ssam vap->iv_stats.is_ps_qempty++; /* XXX node stat */ 2307178354Ssam if (vap->iv_set_tim != NULL) 2308178354Ssam vap->iv_set_tim(ni, 0); /* just in case */ 2309178354Ssam return; 2310178354Ssam } 2311178354Ssam /* 2312178354Ssam * If there are more packets, set the more packets bit 2313178354Ssam * in the packet dispatched to the station; otherwise 2314178354Ssam * turn off the TIM bit. 2315178354Ssam */ 2316178354Ssam if (qlen != 0) { 2317178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2318178354Ssam "recv ps-poll, send packet, %u still queued", qlen); 2319178354Ssam m->m_flags |= M_MORE_DATA; 2320178354Ssam } else { 2321178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2322178354Ssam "%s", "recv ps-poll, send packet, queue empty"); 2323178354Ssam if (vap->iv_set_tim != NULL) 2324178354Ssam vap->iv_set_tim(ni, 0); 2325178354Ssam } 2326178354Ssam m->m_flags |= M_PWR_SAV; /* bypass PS handling */ 2327184288Ssam 2328245098Sadrian /* 2329248069Sadrian * Do the right thing; if it's an encap'ed frame then 2330254082Sadrian * call ieee80211_parent_xmitpkt() (and free the ref) else 2331254082Sadrian * call ieee80211_vap_xmitpkt(). 2332245098Sadrian */ 2333248069Sadrian if (m->m_flags & M_ENCAP) { 2334254082Sadrian if (ieee80211_parent_xmitpkt(ic, m) != 0) 2335245098Sadrian ieee80211_free_node(ni); 2336248069Sadrian } else { 2337254082Sadrian (void) ieee80211_vap_xmitpkt(vap, m); 2338245098Sadrian } 2339178354Ssam} 2340