ieee80211_hostap.c revision 193655
1178354Ssam/*- 2178354Ssam * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 3178354Ssam * All rights reserved. 4178354Ssam * 5178354Ssam * Redistribution and use in source and binary forms, with or without 6178354Ssam * modification, are permitted provided that the following conditions 7178354Ssam * are met: 8178354Ssam * 1. Redistributions of source code must retain the above copyright 9178354Ssam * notice, this list of conditions and the following disclaimer. 10178354Ssam * 2. Redistributions in binary form must reproduce the above copyright 11178354Ssam * notice, this list of conditions and the following disclaimer in the 12178354Ssam * documentation and/or other materials provided with the distribution. 13178354Ssam * 14178354Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15178354Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16178354Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17178354Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18178354Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19178354Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20178354Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21178354Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22178354Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23178354Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24178354Ssam */ 25178354Ssam 26178354Ssam#include <sys/cdefs.h> 27178354Ssam#ifdef __FreeBSD__ 28178354Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_hostap.c 193655 2009-06-07 22:00:22Z sam $"); 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); 76178354Ssamstatic void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *); 77178354Ssam 78178354Ssamvoid 79178354Ssamieee80211_hostap_attach(struct ieee80211com *ic) 80178354Ssam{ 81178354Ssam ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach; 82178354Ssam} 83178354Ssam 84178354Ssamvoid 85178354Ssamieee80211_hostap_detach(struct ieee80211com *ic) 86178354Ssam{ 87178354Ssam} 88178354Ssam 89178354Ssamstatic void 90178354Ssamhostap_vdetach(struct ieee80211vap *vap) 91178354Ssam{ 92178354Ssam} 93178354Ssam 94178354Ssamstatic void 95178354Ssamhostap_vattach(struct ieee80211vap *vap) 96178354Ssam{ 97178354Ssam vap->iv_newstate = hostap_newstate; 98178354Ssam vap->iv_input = hostap_input; 99178354Ssam vap->iv_recv_mgmt = hostap_recv_mgmt; 100191546Ssam vap->iv_recv_ctl = hostap_recv_ctl; 101178354Ssam vap->iv_opdetach = hostap_vdetach; 102178354Ssam vap->iv_deliver_data = hostap_deliver_data; 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 */ 358193292Ssam m->m_flags &= ~(M_80211_RX | M_MCAST | M_BCAST); 359193292Ssam 360178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, 361178354Ssam ("gack, opmode %d", vap->iv_opmode)); 362178354Ssam /* 363178354Ssam * Do accounting. 364178354Ssam */ 365178354Ssam ifp->if_ipackets++; 366178354Ssam IEEE80211_NODE_STAT(ni, rx_data); 367178354Ssam IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); 368178354Ssam if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 369178354Ssam m->m_flags |= M_MCAST; /* XXX M_BCAST? */ 370178354Ssam IEEE80211_NODE_STAT(ni, rx_mcast); 371178354Ssam } else 372178354Ssam IEEE80211_NODE_STAT(ni, rx_ucast); 373178354Ssam 374178354Ssam /* perform as a bridge within the AP */ 375178354Ssam if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) { 376178354Ssam struct mbuf *mcopy = NULL; 377178354Ssam 378178354Ssam if (m->m_flags & M_MCAST) { 379183364Ssam mcopy = m_dup(m, M_DONTWAIT); 380178354Ssam if (mcopy == NULL) 381178354Ssam ifp->if_oerrors++; 382178354Ssam else 383178354Ssam mcopy->m_flags |= M_MCAST; 384178354Ssam } else { 385178354Ssam /* 386178354Ssam * Check if the destination is associated with the 387178354Ssam * same vap and authorized to receive traffic. 388178354Ssam * Beware of traffic destined for the vap itself; 389178354Ssam * sending it will not work; just let it be delivered 390178354Ssam * normally. 391178354Ssam */ 392178354Ssam struct ieee80211_node *sta = ieee80211_find_vap_node( 393178354Ssam &vap->iv_ic->ic_sta, vap, eh->ether_dhost); 394178354Ssam if (sta != NULL) { 395178354Ssam if (ieee80211_node_is_authorized(sta)) { 396178354Ssam /* 397178354Ssam * Beware of sending to ourself; this 398178354Ssam * needs to happen via the normal 399178354Ssam * input path. 400178354Ssam */ 401178354Ssam if (sta != vap->iv_bss) { 402178354Ssam mcopy = m; 403178354Ssam m = NULL; 404178354Ssam } 405178354Ssam } else { 406178354Ssam vap->iv_stats.is_rx_unauth++; 407178354Ssam IEEE80211_NODE_STAT(sta, rx_unauth); 408178354Ssam } 409178354Ssam ieee80211_free_node(sta); 410178354Ssam } 411178354Ssam } 412178354Ssam if (mcopy != NULL) { 413178354Ssam int len, err; 414178354Ssam len = mcopy->m_pkthdr.len; 415186658Ssam err = ifp->if_transmit(ifp, mcopy); 416178354Ssam if (err) { 417178354Ssam /* NB: IFQ_HANDOFF reclaims mcopy */ 418178354Ssam } else { 419178354Ssam ifp->if_opackets++; 420178354Ssam } 421178354Ssam } 422178354Ssam } 423178354Ssam if (m != NULL) { 424178354Ssam /* 425178354Ssam * Mark frame as coming from vap's interface. 426178354Ssam */ 427178354Ssam m->m_pkthdr.rcvif = ifp; 428178354Ssam if (m->m_flags & M_MCAST) { 429178354Ssam /* 430178354Ssam * Spam DWDS vap's w/ multicast traffic. 431178354Ssam */ 432178354Ssam /* XXX only if dwds in use? */ 433178354Ssam ieee80211_dwds_mcast(vap, m); 434178354Ssam } 435178354Ssam if (ni->ni_vlan != 0) { 436178354Ssam /* attach vlan tag */ 437178354Ssam m->m_pkthdr.ether_vtag = ni->ni_vlan; 438178354Ssam m->m_flags |= M_VLANTAG; 439178354Ssam } 440178354Ssam ifp->if_input(ifp, m); 441178354Ssam } 442178354Ssam} 443178354Ssam 444178354Ssam/* 445178354Ssam * Decide if a received management frame should be 446178354Ssam * printed when debugging is enabled. This filters some 447178354Ssam * of the less interesting frames that come frequently 448178354Ssam * (e.g. beacons). 449178354Ssam */ 450178354Ssamstatic __inline int 451178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 452178354Ssam{ 453178354Ssam switch (subtype) { 454178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 455178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 456178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 457178354Ssam return 0; 458178354Ssam } 459178354Ssam return 1; 460178354Ssam} 461178354Ssam 462178354Ssam/* 463178354Ssam * Process a received frame. The node associated with the sender 464178354Ssam * should be supplied. If nothing was found in the node table then 465178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 466178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 467178354Ssam * during AP scanning to select a AP to associate with; it can have 468178354Ssam * any units so long as values have consistent units and higher values 469178354Ssam * mean ``better signal''. The receive timestamp is currently not used 470178354Ssam * by the 802.11 layer. 471178354Ssam */ 472178354Ssamstatic int 473192468Ssamhostap_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 474178354Ssam{ 475178354Ssam#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 476178354Ssam#define HAS_SEQ(type) ((type & 0x4) == 0) 477178354Ssam struct ieee80211vap *vap = ni->ni_vap; 478178354Ssam struct ieee80211com *ic = ni->ni_ic; 479178354Ssam struct ifnet *ifp = vap->iv_ifp; 480178354Ssam struct ieee80211_frame *wh; 481178354Ssam struct ieee80211_key *key; 482178354Ssam struct ether_header *eh; 483178354Ssam int hdrspace, need_tap; 484178354Ssam uint8_t dir, type, subtype, qos; 485178354Ssam uint8_t *bssid; 486178354Ssam uint16_t rxseq; 487178354Ssam 488183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 489178354Ssam /* 490178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 491183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 492183247Ssam * here but were received out of order and been held on 493183247Ssam * the reorder queue. When resubmitted they are marked 494183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 495183247Ssam * the normal processing. 496178354Ssam */ 497178354Ssam wh = mtod(m, struct ieee80211_frame *); 498178354Ssam type = IEEE80211_FC0_TYPE_DATA; 499178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 500178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 501178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 502178354Ssam goto resubmit_ampdu; 503178354Ssam } 504178354Ssam 505178354Ssam KASSERT(ni != NULL, ("null node")); 506178354Ssam ni->ni_inact = ni->ni_inact_reload; 507178354Ssam 508178354Ssam need_tap = 1; /* mbuf need to be tapped. */ 509178354Ssam type = -1; /* undefined */ 510178354Ssam 511178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 512178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 513178354Ssam ni->ni_macaddr, NULL, 514178354Ssam "too short (1): len %u", m->m_pkthdr.len); 515178354Ssam vap->iv_stats.is_rx_tooshort++; 516178354Ssam goto out; 517178354Ssam } 518178354Ssam /* 519178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 520178354Ssam * frame format but don't reference fields past outside 521178354Ssam * ieee80211_frame_min w/o first validating the data is 522178354Ssam * present. 523178354Ssam */ 524178354Ssam wh = mtod(m, struct ieee80211_frame *); 525178354Ssam 526178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 527178354Ssam IEEE80211_FC0_VERSION_0) { 528178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 529191547Ssam ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 530191547Ssam wh->i_fc[0], wh->i_fc[1]); 531178354Ssam vap->iv_stats.is_rx_badversion++; 532178354Ssam goto err; 533178354Ssam } 534178354Ssam 535178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 536178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 537178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 538178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 539178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) 540178354Ssam bssid = wh->i_addr1; 541178354Ssam else if (type == IEEE80211_FC0_TYPE_CTL) 542178354Ssam bssid = wh->i_addr1; 543178354Ssam else { 544178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 545178354Ssam IEEE80211_DISCARD_MAC(vap, 546178354Ssam IEEE80211_MSG_ANY, ni->ni_macaddr, 547178354Ssam NULL, "too short (2): len %u", 548178354Ssam m->m_pkthdr.len); 549178354Ssam vap->iv_stats.is_rx_tooshort++; 550178354Ssam goto out; 551178354Ssam } 552178354Ssam bssid = wh->i_addr3; 553178354Ssam } 554178354Ssam /* 555178354Ssam * Validate the bssid. 556178354Ssam */ 557178354Ssam if (!(type == IEEE80211_FC0_TYPE_MGT && 558178354Ssam subtype == IEEE80211_FC0_SUBTYPE_BEACON) && 559178354Ssam !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && 560178354Ssam !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { 561178354Ssam /* not interested in */ 562178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 563178354Ssam bssid, NULL, "%s", "not to bss"); 564178354Ssam vap->iv_stats.is_rx_wrongbss++; 565178354Ssam goto out; 566178354Ssam } 567178354Ssam 568178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 569192468Ssam ni->ni_noise = nf; 570178354Ssam if (HAS_SEQ(type)) { 571178354Ssam uint8_t tid = ieee80211_gettid(wh); 572178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 573178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 574178354Ssam ic->ic_wme.wme_hipri_traffic++; 575178354Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 576178354Ssam if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 577178354Ssam (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 578178354Ssam SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 579178354Ssam /* duplicate, discard */ 580178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 581178354Ssam bssid, "duplicate", 582178354Ssam "seqno <%u,%u> fragno <%u,%u> tid %u", 583178354Ssam rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 584178354Ssam ni->ni_rxseqs[tid] >> 585178354Ssam IEEE80211_SEQ_SEQ_SHIFT, 586178354Ssam rxseq & IEEE80211_SEQ_FRAG_MASK, 587178354Ssam ni->ni_rxseqs[tid] & 588178354Ssam IEEE80211_SEQ_FRAG_MASK, 589178354Ssam tid); 590178354Ssam vap->iv_stats.is_rx_dup++; 591178354Ssam IEEE80211_NODE_STAT(ni, rx_dup); 592178354Ssam goto out; 593178354Ssam } 594178354Ssam ni->ni_rxseqs[tid] = rxseq; 595178354Ssam } 596178354Ssam } 597178354Ssam 598178354Ssam switch (type) { 599178354Ssam case IEEE80211_FC0_TYPE_DATA: 600178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 601178354Ssam if (m->m_len < hdrspace && 602178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 603178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 604178354Ssam ni->ni_macaddr, NULL, 605178354Ssam "data too short: expecting %u", hdrspace); 606178354Ssam vap->iv_stats.is_rx_tooshort++; 607178354Ssam goto out; /* XXX */ 608178354Ssam } 609178354Ssam if (!(dir == IEEE80211_FC1_DIR_TODS || 610178354Ssam (dir == IEEE80211_FC1_DIR_DSTODS && 611178354Ssam (vap->iv_flags & IEEE80211_F_DWDS)))) { 612178354Ssam if (dir != IEEE80211_FC1_DIR_DSTODS) { 613178354Ssam IEEE80211_DISCARD(vap, 614178354Ssam IEEE80211_MSG_INPUT, wh, "data", 615178354Ssam "incorrect dir 0x%x", dir); 616178354Ssam } else { 617178354Ssam IEEE80211_DISCARD(vap, 618178354Ssam IEEE80211_MSG_INPUT | 619178354Ssam IEEE80211_MSG_WDS, wh, 620178354Ssam "4-address data", 621178354Ssam "%s", "DWDS not enabled"); 622178354Ssam } 623178354Ssam vap->iv_stats.is_rx_wrongdir++; 624178354Ssam goto out; 625178354Ssam } 626178354Ssam /* check if source STA is associated */ 627178354Ssam if (ni == vap->iv_bss) { 628178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 629178354Ssam wh, "data", "%s", "unknown src"); 630178354Ssam ieee80211_send_error(ni, wh->i_addr2, 631178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 632178354Ssam IEEE80211_REASON_NOT_AUTHED); 633178354Ssam vap->iv_stats.is_rx_notassoc++; 634178354Ssam goto err; 635178354Ssam } 636178354Ssam if (ni->ni_associd == 0) { 637178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 638178354Ssam wh, "data", "%s", "unassoc src"); 639178354Ssam IEEE80211_SEND_MGMT(ni, 640178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 641178354Ssam IEEE80211_REASON_NOT_ASSOCED); 642178354Ssam vap->iv_stats.is_rx_notassoc++; 643178354Ssam goto err; 644178354Ssam } 645178354Ssam 646178354Ssam /* 647178354Ssam * Check for power save state change. 648178354Ssam * XXX out-of-order A-MPDU frames? 649178354Ssam */ 650178354Ssam if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^ 651178354Ssam (ni->ni_flags & IEEE80211_NODE_PWR_MGT))) 652178354Ssam ieee80211_node_pwrsave(ni, 653178354Ssam wh->i_fc[1] & IEEE80211_FC1_PWR_MGT); 654178354Ssam /* 655178354Ssam * For 4-address packets handle WDS discovery 656178354Ssam * notifications. Once a WDS link is setup frames 657178354Ssam * are just delivered to the WDS vap (see below). 658178354Ssam */ 659178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) { 660178354Ssam if (!ieee80211_node_is_authorized(ni)) { 661178354Ssam IEEE80211_DISCARD(vap, 662178354Ssam IEEE80211_MSG_INPUT | 663178354Ssam IEEE80211_MSG_WDS, wh, 664178354Ssam "4-address data", 665178354Ssam "%s", "unauthorized port"); 666178354Ssam vap->iv_stats.is_rx_unauth++; 667178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 668178354Ssam goto err; 669178354Ssam } 670178354Ssam ieee80211_dwds_discover(ni, m); 671178354Ssam return type; 672178354Ssam } 673178354Ssam 674178354Ssam /* 675183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 676183247Ssam * processed directly then ieee80211_ampdu_reorder 677178354Ssam * will return 0; otherwise it has consumed the mbuf 678178354Ssam * and we should do nothing more with it. 679178354Ssam */ 680183247Ssam if ((m->m_flags & M_AMPDU) && 681178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 682178354Ssam m = NULL; 683178354Ssam goto out; 684178354Ssam } 685178354Ssam resubmit_ampdu: 686178354Ssam 687178354Ssam /* 688178354Ssam * Handle privacy requirements. Note that we 689178354Ssam * must not be preempted from here until after 690178354Ssam * we (potentially) call ieee80211_crypto_demic; 691178354Ssam * otherwise we may violate assumptions in the 692178354Ssam * crypto cipher modules used to do delayed update 693178354Ssam * of replay sequence numbers. 694178354Ssam */ 695178354Ssam if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 696178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 697178354Ssam /* 698178354Ssam * Discard encrypted frames when privacy is off. 699178354Ssam */ 700178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 701178354Ssam wh, "WEP", "%s", "PRIVACY off"); 702178354Ssam vap->iv_stats.is_rx_noprivacy++; 703178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 704178354Ssam goto out; 705178354Ssam } 706178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 707178354Ssam if (key == NULL) { 708178354Ssam /* NB: stats+msgs handled in crypto_decap */ 709178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 710178354Ssam goto out; 711178354Ssam } 712178354Ssam wh = mtod(m, struct ieee80211_frame *); 713178354Ssam wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 714178354Ssam } else { 715178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 716178354Ssam key = NULL; 717178354Ssam } 718178354Ssam 719178354Ssam /* 720178354Ssam * Save QoS bits for use below--before we strip the header. 721178354Ssam */ 722178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 723178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 724178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 725178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 726178354Ssam } else 727178354Ssam qos = 0; 728178354Ssam 729178354Ssam /* 730178354Ssam * Next up, any fragmentation. 731178354Ssam */ 732178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 733178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 734178354Ssam if (m == NULL) { 735178354Ssam /* Fragment dropped or frame not complete yet */ 736178354Ssam goto out; 737178354Ssam } 738178354Ssam } 739178354Ssam wh = NULL; /* no longer valid, catch any uses */ 740178354Ssam 741178354Ssam /* 742178354Ssam * Next strip any MSDU crypto bits. 743178354Ssam */ 744178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 745178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 746178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 747178354Ssam vap->iv_stats.is_rx_demicfail++; 748178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 749178354Ssam goto out; 750178354Ssam } 751178354Ssam /* copy to listener after decrypt */ 752192468Ssam if (ieee80211_radiotap_active_vap(vap)) 753192468Ssam ieee80211_radiotap_rx(vap, m); 754178354Ssam need_tap = 0; 755178354Ssam /* 756178354Ssam * Finally, strip the 802.11 header. 757178354Ssam */ 758178354Ssam m = ieee80211_decap(vap, m, hdrspace); 759178354Ssam if (m == NULL) { 760178354Ssam /* XXX mask bit to check for both */ 761178354Ssam /* don't count Null data frames as errors */ 762178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 763178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 764178354Ssam goto out; 765178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 766178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 767178354Ssam vap->iv_stats.is_rx_decap++; 768178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 769178354Ssam goto err; 770178354Ssam } 771178354Ssam eh = mtod(m, struct ether_header *); 772178354Ssam if (!ieee80211_node_is_authorized(ni)) { 773178354Ssam /* 774178354Ssam * Deny any non-PAE frames received prior to 775178354Ssam * authorization. For open/shared-key 776178354Ssam * authentication the port is mark authorized 777178354Ssam * after authentication completes. For 802.1x 778178354Ssam * the port is not marked authorized by the 779178354Ssam * authenticator until the handshake has completed. 780178354Ssam */ 781178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 782178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 783178354Ssam eh->ether_shost, "data", 784178354Ssam "unauthorized port: ether type 0x%x len %u", 785178354Ssam eh->ether_type, m->m_pkthdr.len); 786178354Ssam vap->iv_stats.is_rx_unauth++; 787178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 788178354Ssam goto err; 789178354Ssam } 790178354Ssam } else { 791178354Ssam /* 792178354Ssam * When denying unencrypted frames, discard 793178354Ssam * any non-PAE frames received without encryption. 794178354Ssam */ 795178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 796178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 797178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 798178354Ssam /* 799178354Ssam * Drop unencrypted frames. 800178354Ssam */ 801178354Ssam vap->iv_stats.is_rx_unencrypted++; 802178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 803178354Ssam goto out; 804178354Ssam } 805178354Ssam } 806178354Ssam /* XXX require HT? */ 807178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 808178354Ssam m = ieee80211_decap_amsdu(ni, m); 809178354Ssam if (m == NULL) 810178354Ssam return IEEE80211_FC0_TYPE_DATA; 811190391Ssam } else { 812190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 813190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 814190391Ssam if (m == NULL) 815178354Ssam return IEEE80211_FC0_TYPE_DATA; 816190391Ssam#endif 817178354Ssam } 818178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) 819178354Ssam ieee80211_deliver_data(ni->ni_wdsvap, ni, m); 820178354Ssam else 821178354Ssam hostap_deliver_data(vap, ni, m); 822178354Ssam return IEEE80211_FC0_TYPE_DATA; 823178354Ssam 824178354Ssam case IEEE80211_FC0_TYPE_MGT: 825178354Ssam vap->iv_stats.is_rx_mgmt++; 826178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 827178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 828178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 829178354Ssam wh, "mgt", "incorrect dir 0x%x", dir); 830178354Ssam vap->iv_stats.is_rx_wrongdir++; 831178354Ssam goto err; 832178354Ssam } 833178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 834178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 835178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 836178354Ssam m->m_pkthdr.len); 837178354Ssam vap->iv_stats.is_rx_tooshort++; 838178354Ssam goto out; 839178354Ssam } 840178354Ssam if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 841178354Ssam /* ensure return frames are unicast */ 842178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 843178354Ssam wh, NULL, "source is multicast: %s", 844178354Ssam ether_sprintf(wh->i_addr2)); 845178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 846178354Ssam goto out; 847178354Ssam } 848178354Ssam#ifdef IEEE80211_DEBUG 849178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 850178354Ssam ieee80211_msg_dumppkts(vap)) { 851178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 852178354Ssam ieee80211_mgt_subtype_name[subtype >> 853178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 854178354Ssam ether_sprintf(wh->i_addr2), rssi); 855178354Ssam } 856178354Ssam#endif 857178354Ssam if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 858178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 859178354Ssam /* 860178354Ssam * Only shared key auth frames with a challenge 861178354Ssam * should be encrypted, discard all others. 862178354Ssam */ 863178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 864178354Ssam wh, NULL, 865178354Ssam "%s", "WEP set but not permitted"); 866178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 867178354Ssam goto out; 868178354Ssam } 869178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 870178354Ssam /* 871178354Ssam * Discard encrypted frames when privacy is off. 872178354Ssam */ 873178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 874178354Ssam wh, NULL, "%s", "WEP set but PRIVACY off"); 875178354Ssam vap->iv_stats.is_rx_noprivacy++; 876178354Ssam goto out; 877178354Ssam } 878178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 879178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 880178354Ssam if (key == NULL) { 881178354Ssam /* NB: stats+msgs handled in crypto_decap */ 882178354Ssam goto out; 883178354Ssam } 884178354Ssam wh = mtod(m, struct ieee80211_frame *); 885178354Ssam wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 886178354Ssam } 887192468Ssam vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 888191534Ssam goto out; 889178354Ssam 890178354Ssam case IEEE80211_FC0_TYPE_CTL: 891178354Ssam vap->iv_stats.is_rx_ctl++; 892178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 893191546Ssam vap->iv_recv_ctl(ni, m, subtype); 894178354Ssam goto out; 895178354Ssam default: 896178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 897178354Ssam wh, "bad", "frame type 0x%x", type); 898178354Ssam /* should not come here */ 899178354Ssam break; 900178354Ssam } 901178354Ssamerr: 902178354Ssam ifp->if_ierrors++; 903178354Ssamout: 904178354Ssam if (m != NULL) { 905192765Ssam if (need_tap && ieee80211_radiotap_active_vap(vap)) 906192468Ssam ieee80211_radiotap_rx(vap, m); 907178354Ssam m_freem(m); 908178354Ssam } 909178354Ssam return type; 910178354Ssam#undef SEQ_LEQ 911178354Ssam} 912178354Ssam 913178354Ssamstatic void 914178354Ssamhostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 915192468Ssam int rssi, int nf, uint16_t seq, uint16_t status) 916178354Ssam{ 917178354Ssam struct ieee80211vap *vap = ni->ni_vap; 918178354Ssam 919178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 920178354Ssam 921178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 922178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 923178354Ssam ni->ni_macaddr, "open auth", 924178354Ssam "bad sta auth mode %u", ni->ni_authmode); 925178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 926178354Ssam /* 927178354Ssam * Clear any challenge text that may be there if 928178354Ssam * a previous shared key auth failed and then an 929178354Ssam * open auth is attempted. 930178354Ssam */ 931178354Ssam if (ni->ni_challenge != NULL) { 932186302Ssam free(ni->ni_challenge, M_80211_NODE); 933178354Ssam ni->ni_challenge = NULL; 934178354Ssam } 935178354Ssam /* XXX hack to workaround calling convention */ 936178354Ssam ieee80211_send_error(ni, wh->i_addr2, 937178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 938178354Ssam (seq + 1) | (IEEE80211_STATUS_ALG<<16)); 939178354Ssam return; 940178354Ssam } 941178354Ssam if (seq != IEEE80211_AUTH_OPEN_REQUEST) { 942178354Ssam vap->iv_stats.is_rx_bad_auth++; 943178354Ssam return; 944178354Ssam } 945178354Ssam /* always accept open authentication requests */ 946178354Ssam if (ni == vap->iv_bss) { 947178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 948178354Ssam if (ni == NULL) 949178354Ssam return; 950178354Ssam } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 951178354Ssam (void) ieee80211_ref_node(ni); 952178354Ssam /* 953178354Ssam * Mark the node as referenced to reflect that it's 954178354Ssam * reference count has been bumped to insure it remains 955178354Ssam * after the transaction completes. 956178354Ssam */ 957178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 958186099Ssam /* 959186151Ssam * Mark the node as requiring a valid association id 960186099Ssam * before outbound traffic is permitted. 961186099Ssam */ 962186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 963178354Ssam 964178354Ssam if (vap->iv_acl != NULL && 965178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 966178354Ssam /* 967178354Ssam * When the ACL policy is set to RADIUS we defer the 968178354Ssam * authorization to a user agent. Dispatch an event, 969178354Ssam * a subsequent MLME call will decide the fate of the 970178354Ssam * station. If the user agent is not present then the 971178354Ssam * node will be reclaimed due to inactivity. 972178354Ssam */ 973178354Ssam IEEE80211_NOTE_MAC(vap, 974178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, 975178354Ssam "%s", "station authentication defered (radius acl)"); 976178354Ssam ieee80211_notify_node_auth(ni); 977178354Ssam } else { 978178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 979178354Ssam IEEE80211_NOTE_MAC(vap, 980178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr, 981178354Ssam "%s", "station authenticated (open)"); 982178354Ssam /* 983178354Ssam * When 802.1x is not in use mark the port 984178354Ssam * authorized at this point so traffic can flow. 985178354Ssam */ 986178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 987178354Ssam ieee80211_node_authorize(ni); 988178354Ssam } 989178354Ssam} 990178354Ssam 991178354Ssamstatic void 992178354Ssamhostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 993192468Ssam uint8_t *frm, uint8_t *efrm, int rssi, int nf, 994178354Ssam uint16_t seq, uint16_t status) 995178354Ssam{ 996178354Ssam struct ieee80211vap *vap = ni->ni_vap; 997178354Ssam uint8_t *challenge; 998178354Ssam int allocbs, estatus; 999178354Ssam 1000178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 1001178354Ssam 1002178354Ssam /* 1003178354Ssam * NB: this can happen as we allow pre-shared key 1004178354Ssam * authentication to be enabled w/o wep being turned 1005178354Ssam * on so that configuration of these can be done 1006178354Ssam * in any order. It may be better to enforce the 1007178354Ssam * ordering in which case this check would just be 1008178354Ssam * for sanity/consistency. 1009178354Ssam */ 1010178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 1011178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1012178354Ssam ni->ni_macaddr, "shared key auth", 1013178354Ssam "%s", " PRIVACY is disabled"); 1014178354Ssam estatus = IEEE80211_STATUS_ALG; 1015178354Ssam goto bad; 1016178354Ssam } 1017178354Ssam /* 1018178354Ssam * Pre-shared key authentication is evil; accept 1019178354Ssam * it only if explicitly configured (it is supported 1020178354Ssam * mainly for compatibility with clients like Mac OS X). 1021178354Ssam */ 1022178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1023178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1024178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1025178354Ssam ni->ni_macaddr, "shared key auth", 1026178354Ssam "bad sta auth mode %u", ni->ni_authmode); 1027178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1028178354Ssam estatus = IEEE80211_STATUS_ALG; 1029178354Ssam goto bad; 1030178354Ssam } 1031178354Ssam 1032178354Ssam challenge = NULL; 1033178354Ssam if (frm + 1 < efrm) { 1034178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 1035178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1036178354Ssam ni->ni_macaddr, "shared key auth", 1037178354Ssam "ie %d/%d too long", 1038178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 1039178354Ssam vap->iv_stats.is_rx_bad_auth++; 1040178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1041178354Ssam goto bad; 1042178354Ssam } 1043178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1044178354Ssam challenge = frm; 1045178354Ssam frm += frm[1] + 2; 1046178354Ssam } 1047178354Ssam switch (seq) { 1048178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1049178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1050178354Ssam if (challenge == NULL) { 1051178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1052178354Ssam ni->ni_macaddr, "shared key auth", 1053178354Ssam "%s", "no challenge"); 1054178354Ssam vap->iv_stats.is_rx_bad_auth++; 1055178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1056178354Ssam goto bad; 1057178354Ssam } 1058178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1059178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1060178354Ssam ni->ni_macaddr, "shared key auth", 1061178354Ssam "bad challenge len %d", challenge[1]); 1062178354Ssam vap->iv_stats.is_rx_bad_auth++; 1063178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1064178354Ssam goto bad; 1065178354Ssam } 1066178354Ssam default: 1067178354Ssam break; 1068178354Ssam } 1069178354Ssam switch (seq) { 1070178354Ssam case IEEE80211_AUTH_SHARED_REQUEST: 1071178354Ssam if (ni == vap->iv_bss) { 1072178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 1073178354Ssam if (ni == NULL) { 1074178354Ssam /* NB: no way to return an error */ 1075178354Ssam return; 1076178354Ssam } 1077178354Ssam allocbs = 1; 1078178354Ssam } else { 1079178354Ssam if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1080178354Ssam (void) ieee80211_ref_node(ni); 1081178354Ssam allocbs = 0; 1082178354Ssam } 1083178354Ssam /* 1084178354Ssam * Mark the node as referenced to reflect that it's 1085178354Ssam * reference count has been bumped to insure it remains 1086178354Ssam * after the transaction completes. 1087178354Ssam */ 1088178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 1089186099Ssam /* 1090186099Ssam * Mark the node as requiring a valid associatio id 1091186099Ssam * before outbound traffic is permitted. 1092186099Ssam */ 1093186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 1094178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1095192468Ssam ni->ni_noise = nf; 1096178354Ssam if (!ieee80211_alloc_challenge(ni)) { 1097178354Ssam /* NB: don't return error so they rexmit */ 1098178354Ssam return; 1099178354Ssam } 1100178354Ssam get_random_bytes(ni->ni_challenge, 1101178354Ssam IEEE80211_CHALLENGE_LEN); 1102178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1103178354Ssam ni, "shared key %sauth request", allocbs ? "" : "re"); 1104178354Ssam /* 1105178354Ssam * When the ACL policy is set to RADIUS we defer the 1106178354Ssam * authorization to a user agent. Dispatch an event, 1107178354Ssam * a subsequent MLME call will decide the fate of the 1108178354Ssam * station. If the user agent is not present then the 1109178354Ssam * node will be reclaimed due to inactivity. 1110178354Ssam */ 1111178354Ssam if (vap->iv_acl != NULL && 1112178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 1113178354Ssam IEEE80211_NOTE_MAC(vap, 1114178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, 1115178354Ssam ni->ni_macaddr, 1116178354Ssam "%s", "station authentication defered (radius acl)"); 1117178354Ssam ieee80211_notify_node_auth(ni); 1118178354Ssam return; 1119178354Ssam } 1120178354Ssam break; 1121178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1122178354Ssam if (ni == vap->iv_bss) { 1123178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1124178354Ssam ni->ni_macaddr, "shared key response", 1125178354Ssam "%s", "unknown station"); 1126178354Ssam /* NB: don't send a response */ 1127178354Ssam return; 1128178354Ssam } 1129178354Ssam if (ni->ni_challenge == NULL) { 1130178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1131178354Ssam ni->ni_macaddr, "shared key response", 1132178354Ssam "%s", "no challenge recorded"); 1133178354Ssam vap->iv_stats.is_rx_bad_auth++; 1134178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1135178354Ssam goto bad; 1136178354Ssam } 1137178354Ssam if (memcmp(ni->ni_challenge, &challenge[2], 1138178354Ssam challenge[1]) != 0) { 1139178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1140178354Ssam ni->ni_macaddr, "shared key response", 1141178354Ssam "%s", "challenge mismatch"); 1142178354Ssam vap->iv_stats.is_rx_auth_fail++; 1143178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1144178354Ssam goto bad; 1145178354Ssam } 1146178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1147178354Ssam ni, "%s", "station authenticated (shared key)"); 1148178354Ssam ieee80211_node_authorize(ni); 1149178354Ssam break; 1150178354Ssam default: 1151178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1152178354Ssam ni->ni_macaddr, "shared key auth", 1153178354Ssam "bad seq %d", seq); 1154178354Ssam vap->iv_stats.is_rx_bad_auth++; 1155178354Ssam estatus = IEEE80211_STATUS_SEQUENCE; 1156178354Ssam goto bad; 1157178354Ssam } 1158178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1159178354Ssam return; 1160178354Ssambad: 1161178354Ssam /* 1162178354Ssam * Send an error response; but only when operating as an AP. 1163178354Ssam */ 1164178354Ssam /* XXX hack to workaround calling convention */ 1165178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1166178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1167178354Ssam (seq + 1) | (estatus<<16)); 1168178354Ssam} 1169178354Ssam 1170178354Ssam/* 1171178354Ssam * Convert a WPA cipher selector OUI to an internal 1172178354Ssam * cipher algorithm. Where appropriate we also 1173178354Ssam * record any key length. 1174178354Ssam */ 1175178354Ssamstatic int 1176178354Ssamwpa_cipher(const uint8_t *sel, uint8_t *keylen) 1177178354Ssam{ 1178178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1179178354Ssam uint32_t w = LE_READ_4(sel); 1180178354Ssam 1181178354Ssam switch (w) { 1182178354Ssam case WPA_SEL(WPA_CSE_NULL): 1183178354Ssam return IEEE80211_CIPHER_NONE; 1184178354Ssam case WPA_SEL(WPA_CSE_WEP40): 1185178354Ssam if (keylen) 1186178354Ssam *keylen = 40 / NBBY; 1187178354Ssam return IEEE80211_CIPHER_WEP; 1188178354Ssam case WPA_SEL(WPA_CSE_WEP104): 1189178354Ssam if (keylen) 1190178354Ssam *keylen = 104 / NBBY; 1191178354Ssam return IEEE80211_CIPHER_WEP; 1192178354Ssam case WPA_SEL(WPA_CSE_TKIP): 1193178354Ssam return IEEE80211_CIPHER_TKIP; 1194178354Ssam case WPA_SEL(WPA_CSE_CCMP): 1195178354Ssam return IEEE80211_CIPHER_AES_CCM; 1196178354Ssam } 1197178354Ssam return 32; /* NB: so 1<< is discarded */ 1198178354Ssam#undef WPA_SEL 1199178354Ssam} 1200178354Ssam 1201178354Ssam/* 1202178354Ssam * Convert a WPA key management/authentication algorithm 1203178354Ssam * to an internal code. 1204178354Ssam */ 1205178354Ssamstatic int 1206178354Ssamwpa_keymgmt(const uint8_t *sel) 1207178354Ssam{ 1208178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1209178354Ssam uint32_t w = LE_READ_4(sel); 1210178354Ssam 1211178354Ssam switch (w) { 1212178354Ssam case WPA_SEL(WPA_ASE_8021X_UNSPEC): 1213178354Ssam return WPA_ASE_8021X_UNSPEC; 1214178354Ssam case WPA_SEL(WPA_ASE_8021X_PSK): 1215178354Ssam return WPA_ASE_8021X_PSK; 1216178354Ssam case WPA_SEL(WPA_ASE_NONE): 1217178354Ssam return WPA_ASE_NONE; 1218178354Ssam } 1219178354Ssam return 0; /* NB: so is discarded */ 1220178354Ssam#undef WPA_SEL 1221178354Ssam} 1222178354Ssam 1223178354Ssam/* 1224178354Ssam * Parse a WPA information element to collect parameters. 1225178354Ssam * Note that we do not validate security parameters; that 1226178354Ssam * is handled by the authenticator; the parsing done here 1227178354Ssam * is just for internal use in making operational decisions. 1228178354Ssam */ 1229178354Ssamstatic int 1230178354Ssamieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm, 1231178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1232178354Ssam{ 1233178354Ssam uint8_t len = frm[1]; 1234178354Ssam uint32_t w; 1235178354Ssam int n; 1236178354Ssam 1237178354Ssam /* 1238178354Ssam * Check the length once for fixed parts: OUI, type, 1239178354Ssam * version, mcast cipher, and 2 selector counts. 1240178354Ssam * Other, variable-length data, must be checked separately. 1241178354Ssam */ 1242178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) { 1243178354Ssam IEEE80211_DISCARD_IE(vap, 1244178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1245178354Ssam wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags); 1246178354Ssam return IEEE80211_REASON_IE_INVALID; 1247178354Ssam } 1248178354Ssam if (len < 14) { 1249178354Ssam IEEE80211_DISCARD_IE(vap, 1250178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1251178354Ssam wh, "WPA", "too short, len %u", len); 1252178354Ssam return IEEE80211_REASON_IE_INVALID; 1253178354Ssam } 1254178354Ssam frm += 6, len -= 4; /* NB: len is payload only */ 1255178354Ssam /* NB: iswapoui already validated the OUI and type */ 1256178354Ssam w = LE_READ_2(frm); 1257178354Ssam if (w != WPA_VERSION) { 1258178354Ssam IEEE80211_DISCARD_IE(vap, 1259178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1260178354Ssam wh, "WPA", "bad version %u", w); 1261178354Ssam return IEEE80211_REASON_IE_INVALID; 1262178354Ssam } 1263178354Ssam frm += 2, len -= 2; 1264178354Ssam 1265178354Ssam memset(rsn, 0, sizeof(*rsn)); 1266178354Ssam 1267178354Ssam /* multicast/group cipher */ 1268178354Ssam rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen); 1269178354Ssam frm += 4, len -= 4; 1270178354Ssam 1271178354Ssam /* unicast ciphers */ 1272178354Ssam n = LE_READ_2(frm); 1273178354Ssam frm += 2, len -= 2; 1274178354Ssam if (len < n*4+2) { 1275178354Ssam IEEE80211_DISCARD_IE(vap, 1276178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1277178354Ssam wh, "WPA", "ucast cipher data too short; len %u, n %u", 1278178354Ssam len, n); 1279178354Ssam return IEEE80211_REASON_IE_INVALID; 1280178354Ssam } 1281178354Ssam w = 0; 1282178354Ssam for (; n > 0; n--) { 1283178354Ssam w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen); 1284178354Ssam frm += 4, len -= 4; 1285178354Ssam } 1286178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1287178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1288178354Ssam else 1289178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1290178354Ssam 1291178354Ssam /* key management algorithms */ 1292178354Ssam n = LE_READ_2(frm); 1293178354Ssam frm += 2, len -= 2; 1294178354Ssam if (len < n*4) { 1295178354Ssam IEEE80211_DISCARD_IE(vap, 1296178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1297178354Ssam wh, "WPA", "key mgmt alg data too short; len %u, n %u", 1298178354Ssam len, n); 1299178354Ssam return IEEE80211_REASON_IE_INVALID; 1300178354Ssam } 1301178354Ssam w = 0; 1302178354Ssam for (; n > 0; n--) { 1303178354Ssam w |= wpa_keymgmt(frm); 1304178354Ssam frm += 4, len -= 4; 1305178354Ssam } 1306178354Ssam if (w & WPA_ASE_8021X_UNSPEC) 1307178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC; 1308178354Ssam else 1309178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 1310178354Ssam 1311178354Ssam if (len > 2) /* optional capabilities */ 1312178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1313178354Ssam 1314178354Ssam return 0; 1315178354Ssam} 1316178354Ssam 1317178354Ssam/* 1318178354Ssam * Convert an RSN cipher selector OUI to an internal 1319178354Ssam * cipher algorithm. Where appropriate we also 1320178354Ssam * record any key length. 1321178354Ssam */ 1322178354Ssamstatic int 1323178354Ssamrsn_cipher(const uint8_t *sel, uint8_t *keylen) 1324178354Ssam{ 1325178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1326178354Ssam uint32_t w = LE_READ_4(sel); 1327178354Ssam 1328178354Ssam switch (w) { 1329178354Ssam case RSN_SEL(RSN_CSE_NULL): 1330178354Ssam return IEEE80211_CIPHER_NONE; 1331178354Ssam case RSN_SEL(RSN_CSE_WEP40): 1332178354Ssam if (keylen) 1333178354Ssam *keylen = 40 / NBBY; 1334178354Ssam return IEEE80211_CIPHER_WEP; 1335178354Ssam case RSN_SEL(RSN_CSE_WEP104): 1336178354Ssam if (keylen) 1337178354Ssam *keylen = 104 / NBBY; 1338178354Ssam return IEEE80211_CIPHER_WEP; 1339178354Ssam case RSN_SEL(RSN_CSE_TKIP): 1340178354Ssam return IEEE80211_CIPHER_TKIP; 1341178354Ssam case RSN_SEL(RSN_CSE_CCMP): 1342178354Ssam return IEEE80211_CIPHER_AES_CCM; 1343178354Ssam case RSN_SEL(RSN_CSE_WRAP): 1344178354Ssam return IEEE80211_CIPHER_AES_OCB; 1345178354Ssam } 1346178354Ssam return 32; /* NB: so 1<< is discarded */ 1347178354Ssam#undef WPA_SEL 1348178354Ssam} 1349178354Ssam 1350178354Ssam/* 1351178354Ssam * Convert an RSN key management/authentication algorithm 1352178354Ssam * to an internal code. 1353178354Ssam */ 1354178354Ssamstatic int 1355178354Ssamrsn_keymgmt(const uint8_t *sel) 1356178354Ssam{ 1357178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1358178354Ssam uint32_t w = LE_READ_4(sel); 1359178354Ssam 1360178354Ssam switch (w) { 1361178354Ssam case RSN_SEL(RSN_ASE_8021X_UNSPEC): 1362178354Ssam return RSN_ASE_8021X_UNSPEC; 1363178354Ssam case RSN_SEL(RSN_ASE_8021X_PSK): 1364178354Ssam return RSN_ASE_8021X_PSK; 1365178354Ssam case RSN_SEL(RSN_ASE_NONE): 1366178354Ssam return RSN_ASE_NONE; 1367178354Ssam } 1368178354Ssam return 0; /* NB: so is discarded */ 1369178354Ssam#undef RSN_SEL 1370178354Ssam} 1371178354Ssam 1372178354Ssam/* 1373178354Ssam * Parse a WPA/RSN information element to collect parameters 1374178354Ssam * and validate the parameters against what has been 1375178354Ssam * configured for the system. 1376178354Ssam */ 1377178354Ssamstatic int 1378178354Ssamieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm, 1379178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1380178354Ssam{ 1381178354Ssam uint8_t len = frm[1]; 1382178354Ssam uint32_t w; 1383178354Ssam int n; 1384178354Ssam 1385178354Ssam /* 1386178354Ssam * Check the length once for fixed parts: 1387178354Ssam * version, mcast cipher, and 2 selector counts. 1388178354Ssam * Other, variable-length data, must be checked separately. 1389178354Ssam */ 1390178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) { 1391178354Ssam IEEE80211_DISCARD_IE(vap, 1392178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1393178354Ssam wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags); 1394178354Ssam return IEEE80211_REASON_IE_INVALID; 1395178354Ssam } 1396178354Ssam if (len < 10) { 1397178354Ssam IEEE80211_DISCARD_IE(vap, 1398178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1399178354Ssam wh, "RSN", "too short, len %u", len); 1400178354Ssam return IEEE80211_REASON_IE_INVALID; 1401178354Ssam } 1402178354Ssam frm += 2; 1403178354Ssam w = LE_READ_2(frm); 1404178354Ssam if (w != RSN_VERSION) { 1405178354Ssam IEEE80211_DISCARD_IE(vap, 1406178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1407178354Ssam wh, "RSN", "bad version %u", w); 1408178354Ssam return IEEE80211_REASON_IE_INVALID; 1409178354Ssam } 1410178354Ssam frm += 2, len -= 2; 1411178354Ssam 1412178354Ssam memset(rsn, 0, sizeof(*rsn)); 1413178354Ssam 1414178354Ssam /* multicast/group cipher */ 1415178354Ssam rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen); 1416178354Ssam frm += 4, len -= 4; 1417178354Ssam 1418178354Ssam /* unicast ciphers */ 1419178354Ssam n = LE_READ_2(frm); 1420178354Ssam frm += 2, len -= 2; 1421178354Ssam if (len < n*4+2) { 1422178354Ssam IEEE80211_DISCARD_IE(vap, 1423178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1424178354Ssam wh, "RSN", "ucast cipher data too short; len %u, n %u", 1425178354Ssam len, n); 1426178354Ssam return IEEE80211_REASON_IE_INVALID; 1427178354Ssam } 1428178354Ssam w = 0; 1429178354Ssam for (; n > 0; n--) { 1430178354Ssam w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen); 1431178354Ssam frm += 4, len -= 4; 1432178354Ssam } 1433178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1434178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1435178354Ssam else 1436178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1437178354Ssam 1438178354Ssam /* key management algorithms */ 1439178354Ssam n = LE_READ_2(frm); 1440178354Ssam frm += 2, len -= 2; 1441178354Ssam if (len < n*4) { 1442178354Ssam IEEE80211_DISCARD_IE(vap, 1443178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1444178354Ssam wh, "RSN", "key mgmt alg data too short; len %u, n %u", 1445178354Ssam len, n); 1446178354Ssam return IEEE80211_REASON_IE_INVALID; 1447178354Ssam } 1448178354Ssam w = 0; 1449178354Ssam for (; n > 0; n--) { 1450178354Ssam w |= rsn_keymgmt(frm); 1451178354Ssam frm += 4, len -= 4; 1452178354Ssam } 1453178354Ssam if (w & RSN_ASE_8021X_UNSPEC) 1454178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC; 1455178354Ssam else 1456178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_PSK; 1457178354Ssam 1458178354Ssam /* optional RSN capabilities */ 1459178354Ssam if (len > 2) 1460178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1461178354Ssam /* XXXPMKID */ 1462178354Ssam 1463178354Ssam return 0; 1464178354Ssam} 1465178354Ssam 1466178354Ssam/* 1467178354Ssam * WPA/802.11i assocation request processing. 1468178354Ssam */ 1469178354Ssamstatic int 1470178354Ssamwpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms, 1471178354Ssam const struct ieee80211_frame *wh, const uint8_t *wpa, 1472178354Ssam const uint8_t *rsn, uint16_t capinfo) 1473178354Ssam{ 1474178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1475178354Ssam uint8_t reason; 1476178354Ssam int badwparsn; 1477178354Ssam 1478178354Ssam ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN); 1479178354Ssam if (wpa == NULL && rsn == NULL) { 1480178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) { 1481178354Ssam /* 1482178354Ssam * W-Fi Protected Setup (WPS) permits 1483178354Ssam * clients to associate and pass EAPOL frames 1484178354Ssam * to establish initial credentials. 1485178354Ssam */ 1486178354Ssam ni->ni_flags |= IEEE80211_NODE_WPS; 1487178354Ssam return 1; 1488178354Ssam } 1489178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) && 1490178354Ssam (capinfo & IEEE80211_CAPINFO_PRIVACY)) { 1491178354Ssam /* 1492178354Ssam * Transitional Security Network. Permits clients 1493178354Ssam * to associate and use WEP while WPA is configured. 1494178354Ssam */ 1495178354Ssam ni->ni_flags |= IEEE80211_NODE_TSN; 1496178354Ssam return 1; 1497178354Ssam } 1498178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1499178354Ssam wh, NULL, "%s", "no WPA/RSN IE in association request"); 1500178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1501178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1502178354Ssam goto bad; 1503178354Ssam } 1504178354Ssam /* assert right association security credentials */ 1505178354Ssam badwparsn = 0; /* NB: to silence compiler */ 1506178354Ssam switch (vap->iv_flags & IEEE80211_F_WPA) { 1507178354Ssam case IEEE80211_F_WPA1: 1508178354Ssam badwparsn = (wpa == NULL); 1509178354Ssam break; 1510178354Ssam case IEEE80211_F_WPA2: 1511178354Ssam badwparsn = (rsn == NULL); 1512178354Ssam break; 1513178354Ssam case IEEE80211_F_WPA1|IEEE80211_F_WPA2: 1514178354Ssam badwparsn = (wpa == NULL && rsn == NULL); 1515178354Ssam break; 1516178354Ssam } 1517178354Ssam if (badwparsn) { 1518178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1519178354Ssam wh, NULL, 1520178354Ssam "%s", "missing WPA/RSN IE in association request"); 1521178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1522178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1523178354Ssam goto bad; 1524178354Ssam } 1525178354Ssam /* 1526178354Ssam * Parse WPA/RSN information element. 1527178354Ssam */ 1528178354Ssam if (wpa != NULL) 1529178354Ssam reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh); 1530178354Ssam else 1531178354Ssam reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh); 1532178354Ssam if (reason != 0) { 1533178354Ssam /* XXX distinguish WPA/RSN? */ 1534178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1535178354Ssam goto bad; 1536178354Ssam } 1537178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni, 1538178354Ssam "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x", 1539178354Ssam wpa != NULL ? "WPA" : "RSN", 1540178354Ssam rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen, 1541178354Ssam rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen, 1542178354Ssam rsnparms->rsn_keymgmt, rsnparms->rsn_caps); 1543178354Ssam 1544178354Ssam return 1; 1545178354Ssambad: 1546178354Ssam ieee80211_node_deauth(ni, reason); 1547178354Ssam return 0; 1548178354Ssam} 1549178354Ssam 1550178354Ssam/* XXX find a better place for definition */ 1551178354Ssamstruct l2_update_frame { 1552178354Ssam struct ether_header eh; 1553178354Ssam uint8_t dsap; 1554178354Ssam uint8_t ssap; 1555178354Ssam uint8_t control; 1556178354Ssam uint8_t xid[3]; 1557178354Ssam} __packed; 1558178354Ssam 1559178354Ssam/* 1560178354Ssam * Deliver a TGf L2UF frame on behalf of a station. 1561178354Ssam * This primes any bridge when the station is roaming 1562178354Ssam * between ap's on the same wired network. 1563178354Ssam */ 1564178354Ssamstatic void 1565178354Ssamieee80211_deliver_l2uf(struct ieee80211_node *ni) 1566178354Ssam{ 1567178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1568178354Ssam struct ifnet *ifp = vap->iv_ifp; 1569178354Ssam struct mbuf *m; 1570178354Ssam struct l2_update_frame *l2uf; 1571178354Ssam struct ether_header *eh; 1572178354Ssam 1573178354Ssam m = m_gethdr(M_NOWAIT, MT_DATA); 1574178354Ssam if (m == NULL) { 1575178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1576178354Ssam "%s", "no mbuf for l2uf frame"); 1577178354Ssam vap->iv_stats.is_rx_nobuf++; /* XXX not right */ 1578178354Ssam return; 1579178354Ssam } 1580178354Ssam l2uf = mtod(m, struct l2_update_frame *); 1581178354Ssam eh = &l2uf->eh; 1582178354Ssam /* dst: Broadcast address */ 1583178354Ssam IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr); 1584178354Ssam /* src: associated STA */ 1585178354Ssam IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr); 1586178354Ssam eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh)); 1587178354Ssam 1588178354Ssam l2uf->dsap = 0; 1589178354Ssam l2uf->ssap = 0; 1590178354Ssam l2uf->control = 0xf5; 1591178354Ssam l2uf->xid[0] = 0x81; 1592178354Ssam l2uf->xid[1] = 0x80; 1593178354Ssam l2uf->xid[2] = 0x00; 1594178354Ssam 1595178354Ssam m->m_pkthdr.len = m->m_len = sizeof(*l2uf); 1596178354Ssam hostap_deliver_data(vap, ni, m); 1597178354Ssam} 1598178354Ssam 1599178354Ssamstatic void 1600178354Ssamratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1601178354Ssam int reassoc, int resp, const char *tag, int rate) 1602178354Ssam{ 1603178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1604178354Ssam "deny %s request, %s rate set mismatch, rate/MCS %d", 1605178354Ssam reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL); 1606178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE); 1607178354Ssam ieee80211_node_leave(ni); 1608178354Ssam} 1609178354Ssam 1610178354Ssamstatic void 1611178354Ssamcapinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1612178354Ssam int reassoc, int resp, const char *tag, int capinfo) 1613178354Ssam{ 1614178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1615178354Ssam 1616178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1617178354Ssam "deny %s request, %s mismatch 0x%x", 1618178354Ssam reassoc ? "reassoc" : "assoc", tag, capinfo); 1619178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO); 1620178354Ssam ieee80211_node_leave(ni); 1621178354Ssam vap->iv_stats.is_rx_assoc_capmismatch++; 1622178354Ssam} 1623178354Ssam 1624178354Ssamstatic void 1625178354Ssamhtcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1626178354Ssam int reassoc, int resp) 1627178354Ssam{ 1628178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1629178354Ssam "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc"); 1630178354Ssam /* XXX no better code */ 1631193543Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS); 1632178354Ssam ieee80211_node_leave(ni); 1633178354Ssam} 1634178354Ssam 1635178354Ssamstatic void 1636178354Ssamauthalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1637178354Ssam int algo, int seq, int status) 1638178354Ssam{ 1639178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1640178354Ssam 1641178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1642178354Ssam wh, NULL, "unsupported alg %d", algo); 1643178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1644178354Ssam ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, 1645178354Ssam seq | (status << 16)); 1646178354Ssam} 1647178354Ssam 1648178354Ssamstatic __inline int 1649178354Ssamishtmixed(const uint8_t *ie) 1650178354Ssam{ 1651178354Ssam const struct ieee80211_ie_htinfo *ht = 1652178354Ssam (const struct ieee80211_ie_htinfo *) ie; 1653178354Ssam return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) == 1654178354Ssam IEEE80211_HTINFO_OPMODE_MIXED; 1655178354Ssam} 1656178354Ssam 1657178354Ssamstatic int 1658178354Ssamis11bclient(const uint8_t *rates, const uint8_t *xrates) 1659178354Ssam{ 1660178354Ssam static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); 1661178354Ssam int i; 1662178354Ssam 1663178354Ssam /* NB: the 11b clients we care about will not have xrates */ 1664178354Ssam if (xrates != NULL || rates == NULL) 1665178354Ssam return 0; 1666178354Ssam for (i = 0; i < rates[1]; i++) { 1667178354Ssam int r = rates[2+i] & IEEE80211_RATE_VAL; 1668178354Ssam if (r > 2*11 || ((1<<r) & brates) == 0) 1669178354Ssam return 0; 1670178354Ssam } 1671178354Ssam return 1; 1672178354Ssam} 1673178354Ssam 1674178354Ssamstatic void 1675178354Ssamhostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1676192468Ssam int subtype, int rssi, int nf) 1677178354Ssam{ 1678178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1679178354Ssam struct ieee80211com *ic = ni->ni_ic; 1680178354Ssam struct ieee80211_frame *wh; 1681178354Ssam uint8_t *frm, *efrm, *sfrm; 1682178354Ssam uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap; 1683178354Ssam int reassoc, resp; 1684178354Ssam uint8_t rate; 1685178354Ssam 1686178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1687178354Ssam frm = (uint8_t *)&wh[1]; 1688178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1689178354Ssam switch (subtype) { 1690178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1691178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1692178354Ssam struct ieee80211_scanparams scan; 1693178354Ssam /* 1694178354Ssam * We process beacon/probe response frames when scanning; 1695178354Ssam * otherwise we check beacon frames for overlapping non-ERP 1696178354Ssam * BSS in 11g and/or overlapping legacy BSS when in HT. 1697178354Ssam */ 1698178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 && 1699178354Ssam subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1700178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1701178354Ssam return; 1702178354Ssam } 1703178354Ssam /* NB: accept off-channel frames */ 1704178354Ssam if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN) 1705178354Ssam return; 1706178354Ssam /* 1707178354Ssam * Count frame now that we know it's to be processed. 1708178354Ssam */ 1709178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1710178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1711178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1712178354Ssam } else 1713178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1714178354Ssam /* 1715178354Ssam * If scanning, just pass information to the scan module. 1716178354Ssam */ 1717178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1718178354Ssam if (scan.status == 0 && /* NB: on channel */ 1719178354Ssam (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) { 1720178354Ssam /* 1721178354Ssam * Actively scanning a channel marked passive; 1722178354Ssam * send a probe request now that we know there 1723178354Ssam * is 802.11 traffic present. 1724178354Ssam * 1725178354Ssam * XXX check if the beacon we recv'd gives 1726178354Ssam * us what we need and suppress the probe req 1727178354Ssam */ 1728178354Ssam ieee80211_probe_curchan(vap, 1); 1729178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1730178354Ssam } 1731192468Ssam ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf); 1732178354Ssam return; 1733178354Ssam } 1734178354Ssam /* 1735178354Ssam * Check beacon for overlapping bss w/ non ERP stations. 1736178354Ssam * If we detect one and protection is configured but not 1737178354Ssam * enabled, enable it and start a timer that'll bring us 1738178354Ssam * out if we stop seeing the bss. 1739178354Ssam */ 1740178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1741178354Ssam scan.status == 0 && /* NB: on-channel */ 1742178354Ssam ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/ 1743178354Ssam (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) { 1744178354Ssam ic->ic_lastnonerp = ticks; 1745178354Ssam ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR; 1746178354Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE && 1747178354Ssam (ic->ic_flags & IEEE80211_F_USEPROT) == 0) { 1748178354Ssam IEEE80211_NOTE_FRAME(vap, 1749178354Ssam IEEE80211_MSG_ASSOC, wh, 1750178354Ssam "non-ERP present on channel %d " 1751178354Ssam "(saw erp 0x%x from channel %d), " 1752178354Ssam "enable use of protection", 1753178354Ssam ic->ic_curchan->ic_ieee, 1754178354Ssam scan.erp, scan.chan); 1755178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1756178354Ssam ieee80211_notify_erp(ic); 1757178354Ssam } 1758178354Ssam } 1759178354Ssam /* 1760178354Ssam * Check beacon for non-HT station on HT channel 1761178354Ssam * and update HT BSS occupancy as appropriate. 1762178354Ssam */ 1763178354Ssam if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) { 1764178354Ssam if (scan.status & IEEE80211_BPARSE_OFFCHAN) { 1765178354Ssam /* 1766178354Ssam * Off control channel; only check frames 1767178354Ssam * that come in the extension channel when 1768178354Ssam * operating w/ HT40. 1769178354Ssam */ 1770178354Ssam if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) 1771178354Ssam break; 1772178354Ssam if (scan.chan != ic->ic_curchan->ic_extieee) 1773178354Ssam break; 1774178354Ssam } 1775178354Ssam if (scan.htinfo == NULL) { 1776178354Ssam ieee80211_htprot_update(ic, 1777178354Ssam IEEE80211_HTINFO_OPMODE_PROTOPT | 1778178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1779178354Ssam } else if (ishtmixed(scan.htinfo)) { 1780178354Ssam /* XXX? take NONHT_PRESENT from beacon? */ 1781178354Ssam ieee80211_htprot_update(ic, 1782178354Ssam IEEE80211_HTINFO_OPMODE_MIXED | 1783178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1784178354Ssam } 1785178354Ssam } 1786178354Ssam break; 1787178354Ssam } 1788178354Ssam 1789178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1790178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1791178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1792178354Ssam return; 1793178354Ssam } 1794178354Ssam /* 1795178354Ssam * prreq frame format 1796178354Ssam * [tlv] ssid 1797178354Ssam * [tlv] supported rates 1798178354Ssam * [tlv] extended supported rates 1799178354Ssam */ 1800178354Ssam ssid = rates = xrates = NULL; 1801178354Ssam sfrm = frm; 1802178354Ssam while (efrm - frm > 1) { 1803178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1804178354Ssam switch (*frm) { 1805178354Ssam case IEEE80211_ELEMID_SSID: 1806178354Ssam ssid = frm; 1807178354Ssam break; 1808178354Ssam case IEEE80211_ELEMID_RATES: 1809178354Ssam rates = frm; 1810178354Ssam break; 1811178354Ssam case IEEE80211_ELEMID_XRATES: 1812178354Ssam xrates = frm; 1813178354Ssam break; 1814178354Ssam } 1815178354Ssam frm += frm[1] + 2; 1816178354Ssam } 1817178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1818178354Ssam if (xrates != NULL) 1819178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1820178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1821178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1822178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1823178354Ssam if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { 1824178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1825178354Ssam wh, NULL, 1826178354Ssam "%s", "no ssid with ssid suppression enabled"); 1827178354Ssam vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ 1828178354Ssam return; 1829178354Ssam } 1830178354Ssam 1831178354Ssam /* XXX find a better class or define it's own */ 1832178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1833178354Ssam "%s", "recv probe req"); 1834178354Ssam /* 1835178354Ssam * Some legacy 11b clients cannot hack a complete 1836178354Ssam * probe response frame. When the request includes 1837178354Ssam * only a bare-bones rate set, communicate this to 1838178354Ssam * the transmit side. 1839178354Ssam */ 1840178354Ssam ieee80211_send_proberesp(vap, wh->i_addr2, 1841178354Ssam is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); 1842178354Ssam break; 1843178354Ssam 1844178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1845178354Ssam uint16_t algo, seq, status; 1846178354Ssam 1847178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1848178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1849178354Ssam return; 1850178354Ssam } 1851178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1852178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1853178354Ssam wh, NULL, "%s", "wrong bssid"); 1854178354Ssam vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/ 1855178354Ssam return; 1856178354Ssam } 1857178354Ssam /* 1858178354Ssam * auth frame format 1859178354Ssam * [2] algorithm 1860178354Ssam * [2] sequence 1861178354Ssam * [2] status 1862178354Ssam * [tlv*] challenge 1863178354Ssam */ 1864178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1865178354Ssam algo = le16toh(*(uint16_t *)frm); 1866178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1867178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1868178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1869178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1870178354Ssam /* 1871178354Ssam * Consult the ACL policy module if setup. 1872178354Ssam */ 1873178354Ssam if (vap->iv_acl != NULL && 1874178354Ssam !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1875178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1876178354Ssam wh, NULL, "%s", "disallowed by ACL"); 1877178354Ssam vap->iv_stats.is_rx_acl++; 1878178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1879178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1880178354Ssam (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16)); 1881178354Ssam return; 1882178354Ssam } 1883178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1884178354Ssam IEEE80211_DISCARD(vap, 1885178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1886178354Ssam wh, NULL, "%s", "TKIP countermeasures enabled"); 1887178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1888178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1889178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1890178354Ssam IEEE80211_REASON_MIC_FAILURE); 1891178354Ssam return; 1892178354Ssam } 1893178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1894192468Ssam hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1895192468Ssam seq, status); 1896178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1897192468Ssam hostap_auth_open(ni, wh, rssi, nf, seq, status); 1898178354Ssam else if (algo == IEEE80211_AUTH_ALG_LEAP) { 1899178354Ssam authalgreject(ni, wh, algo, 1900178354Ssam seq+1, IEEE80211_STATUS_ALG); 1901178354Ssam return; 1902178354Ssam } else { 1903178354Ssam /* 1904178354Ssam * We assume that an unknown algorithm is the result 1905178354Ssam * of a decryption failure on a shared key auth frame; 1906178354Ssam * return a status code appropriate for that instead 1907178354Ssam * of IEEE80211_STATUS_ALG. 1908178354Ssam * 1909178354Ssam * NB: a seq# of 4 is intentional; the decrypted 1910178354Ssam * frame likely has a bogus seq value. 1911178354Ssam */ 1912178354Ssam authalgreject(ni, wh, algo, 1913178354Ssam 4, IEEE80211_STATUS_CHALLENGE); 1914178354Ssam return; 1915178354Ssam } 1916178354Ssam break; 1917178354Ssam } 1918178354Ssam 1919178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1920178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { 1921178354Ssam uint16_t capinfo, lintval; 1922178354Ssam struct ieee80211_rsnparms rsnparms; 1923178354Ssam 1924178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1925178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1926178354Ssam return; 1927178354Ssam } 1928178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1929178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1930178354Ssam wh, NULL, "%s", "wrong bssid"); 1931178354Ssam vap->iv_stats.is_rx_assoc_bss++; 1932178354Ssam return; 1933178354Ssam } 1934178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 1935178354Ssam reassoc = 1; 1936178354Ssam resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; 1937178354Ssam } else { 1938178354Ssam reassoc = 0; 1939178354Ssam resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; 1940178354Ssam } 1941178354Ssam if (ni == vap->iv_bss) { 1942178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1943178354Ssam "deny %s request, sta not authenticated", 1944178354Ssam reassoc ? "reassoc" : "assoc"); 1945178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1946178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1947178354Ssam IEEE80211_REASON_ASSOC_NOT_AUTHED); 1948178354Ssam vap->iv_stats.is_rx_assoc_notauth++; 1949178354Ssam return; 1950178354Ssam } 1951178354Ssam 1952178354Ssam /* 1953178354Ssam * asreq frame format 1954178354Ssam * [2] capability information 1955178354Ssam * [2] listen interval 1956178354Ssam * [6*] current AP address (reassoc only) 1957178354Ssam * [tlv] ssid 1958178354Ssam * [tlv] supported rates 1959178354Ssam * [tlv] extended supported rates 1960178354Ssam * [tlv] WPA or RSN 1961178354Ssam * [tlv] HT capabilities 1962178354Ssam * [tlv] Atheros capabilities 1963178354Ssam */ 1964178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return); 1965178354Ssam capinfo = le16toh(*(uint16_t *)frm); frm += 2; 1966178354Ssam lintval = le16toh(*(uint16_t *)frm); frm += 2; 1967178354Ssam if (reassoc) 1968178354Ssam frm += 6; /* ignore current AP info */ 1969178354Ssam ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL; 1970178354Ssam sfrm = frm; 1971178354Ssam while (efrm - frm > 1) { 1972178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1973178354Ssam switch (*frm) { 1974178354Ssam case IEEE80211_ELEMID_SSID: 1975178354Ssam ssid = frm; 1976178354Ssam break; 1977178354Ssam case IEEE80211_ELEMID_RATES: 1978178354Ssam rates = frm; 1979178354Ssam break; 1980178354Ssam case IEEE80211_ELEMID_XRATES: 1981178354Ssam xrates = frm; 1982178354Ssam break; 1983178354Ssam case IEEE80211_ELEMID_RSN: 1984178354Ssam rsn = frm; 1985178354Ssam break; 1986178354Ssam case IEEE80211_ELEMID_HTCAP: 1987178354Ssam htcap = frm; 1988178354Ssam break; 1989178354Ssam case IEEE80211_ELEMID_VENDOR: 1990178354Ssam if (iswpaoui(frm)) 1991178354Ssam wpa = frm; 1992178354Ssam else if (iswmeinfo(frm)) 1993178354Ssam wme = frm; 1994190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1995178354Ssam else if (isatherosoui(frm)) 1996178354Ssam ath = frm; 1997190391Ssam#endif 1998193655Ssam else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1999178354Ssam if (ishtcapoui(frm) && htcap == NULL) 2000178354Ssam htcap = frm; 2001178354Ssam } 2002178354Ssam break; 2003178354Ssam } 2004178354Ssam frm += frm[1] + 2; 2005178354Ssam } 2006178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2007178354Ssam if (xrates != NULL) 2008178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 2009178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 2010178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2011178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 2012178354Ssam if (htcap != NULL) { 2013178354Ssam IEEE80211_VERIFY_LENGTH(htcap[1], 2014178354Ssam htcap[0] == IEEE80211_ELEMID_VENDOR ? 2015178354Ssam 4 + sizeof(struct ieee80211_ie_htcap)-2 : 2016178354Ssam sizeof(struct ieee80211_ie_htcap)-2, 2017178354Ssam return); /* XXX just NULL out? */ 2018178354Ssam } 2019178354Ssam 2020178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA) && 2021178354Ssam !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo)) 2022178354Ssam return; 2023178354Ssam /* discard challenge after association */ 2024178354Ssam if (ni->ni_challenge != NULL) { 2025186302Ssam free(ni->ni_challenge, M_80211_NODE); 2026178354Ssam ni->ni_challenge = NULL; 2027178354Ssam } 2028178354Ssam /* NB: 802.11 spec says to ignore station's privacy bit */ 2029178354Ssam if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) { 2030178354Ssam capinfomismatch(ni, wh, reassoc, resp, 2031178354Ssam "capability", capinfo); 2032178354Ssam return; 2033178354Ssam } 2034178354Ssam /* 2035178354Ssam * Disallow re-associate w/ invalid slot time setting. 2036178354Ssam */ 2037178354Ssam if (ni->ni_associd != 0 && 2038178354Ssam IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2039178354Ssam ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) { 2040178354Ssam capinfomismatch(ni, wh, reassoc, resp, 2041178354Ssam "slot time", capinfo); 2042178354Ssam return; 2043178354Ssam } 2044178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 2045178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 2046178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2047178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2048178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate); 2049178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2050178354Ssam return; 2051178354Ssam } 2052178354Ssam /* 2053178354Ssam * If constrained to 11g-only stations reject an 2054178354Ssam * 11b-only station. We cheat a bit here by looking 2055178354Ssam * at the max negotiated xmit rate and assuming anyone 2056178354Ssam * with a best rate <24Mb/s is an 11b station. 2057178354Ssam */ 2058178354Ssam if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) { 2059178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "11g", rate); 2060178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2061178354Ssam return; 2062178354Ssam } 2063178354Ssam /* 2064178354Ssam * Do HT rate set handling and setup HT node state. 2065178354Ssam */ 2066178354Ssam ni->ni_chan = vap->iv_bss->ni_chan; 2067178354Ssam if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { 2068178354Ssam rate = ieee80211_setup_htrates(ni, htcap, 2069178354Ssam IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO | 2070178354Ssam IEEE80211_F_DOBRS); 2071178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2072178354Ssam ratesetmismatch(ni, wh, reassoc, resp, 2073178354Ssam "HT", rate); 2074178354Ssam vap->iv_stats.is_ht_assoc_norate++; 2075178354Ssam return; 2076178354Ssam } 2077183254Ssam ieee80211_ht_node_init(ni); 2078183254Ssam ieee80211_ht_updatehtcap(ni, htcap); 2079178354Ssam } else if (ni->ni_flags & IEEE80211_NODE_HT) 2080178354Ssam ieee80211_ht_node_cleanup(ni); 2081190579Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2082190579Ssam else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 2083190579Ssam ieee80211_ff_node_cleanup(ni); 2084190579Ssam#endif 2085178354Ssam /* 2086178354Ssam * Allow AMPDU operation only with unencrypted traffic 2087178354Ssam * or AES-CCM; the 11n spec only specifies these ciphers 2088178354Ssam * so permitting any others is undefined and can lead 2089178354Ssam * to interoperability problems. 2090178354Ssam */ 2091178354Ssam if ((ni->ni_flags & IEEE80211_NODE_HT) && 2092178354Ssam (((vap->iv_flags & IEEE80211_F_WPA) && 2093178354Ssam rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) || 2094178354Ssam (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) { 2095178354Ssam IEEE80211_NOTE(vap, 2096178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 2097178354Ssam "disallow HT use because WEP or TKIP requested, " 2098178354Ssam "capinfo 0x%x ucastcipher %d", capinfo, 2099178354Ssam rsnparms.rsn_ucastcipher); 2100178354Ssam ieee80211_ht_node_cleanup(ni); 2101178354Ssam vap->iv_stats.is_ht_assoc_downgrade++; 2102178354Ssam } 2103178354Ssam /* 2104178354Ssam * If constrained to 11n-only stations reject legacy stations. 2105178354Ssam */ 2106193655Ssam if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) && 2107178354Ssam (ni->ni_flags & IEEE80211_NODE_HT) == 0) { 2108178354Ssam htcapmismatch(ni, wh, reassoc, resp); 2109178354Ssam vap->iv_stats.is_ht_assoc_nohtcap++; 2110178354Ssam return; 2111178354Ssam } 2112178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 2113192468Ssam ni->ni_noise = nf; 2114178354Ssam ni->ni_intval = lintval; 2115178354Ssam ni->ni_capinfo = capinfo; 2116178354Ssam ni->ni_fhdwell = vap->iv_bss->ni_fhdwell; 2117178354Ssam ni->ni_fhindex = vap->iv_bss->ni_fhindex; 2118178354Ssam /* 2119178354Ssam * Store the IEs. 2120178354Ssam * XXX maybe better to just expand 2121178354Ssam */ 2122178354Ssam if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) { 2123178354Ssam#define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off) 2124178354Ssam if (wpa != NULL) 2125178354Ssam setie(wpa_ie, wpa - sfrm); 2126178354Ssam if (rsn != NULL) 2127178354Ssam setie(rsn_ie, rsn - sfrm); 2128178354Ssam if (htcap != NULL) 2129178354Ssam setie(htcap_ie, htcap - sfrm); 2130178354Ssam if (wme != NULL) { 2131178354Ssam setie(wme_ie, wme - sfrm); 2132178354Ssam /* 2133178354Ssam * Mark node as capable of QoS. 2134178354Ssam */ 2135178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 2136178354Ssam } else 2137178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2138190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2139178354Ssam if (ath != NULL) { 2140178354Ssam setie(ath_ie, ath - sfrm); 2141178354Ssam /* 2142178354Ssam * Parse ATH station parameters. 2143178354Ssam */ 2144178354Ssam ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 2145178354Ssam } else 2146190391Ssam#endif 2147178354Ssam ni->ni_ath_flags = 0; 2148178354Ssam#undef setie 2149178354Ssam } else { 2150178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2151178354Ssam ni->ni_ath_flags = 0; 2152178354Ssam } 2153178354Ssam ieee80211_node_join(ni, resp); 2154178354Ssam ieee80211_deliver_l2uf(ni); 2155178354Ssam break; 2156178354Ssam } 2157178354Ssam 2158178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 2159178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 2160178354Ssam uint16_t reason; 2161178354Ssam 2162178354Ssam if (vap->iv_state != IEEE80211_S_RUN || 2163178354Ssam /* NB: can happen when in promiscuous mode */ 2164178354Ssam !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 2165178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2166178354Ssam break; 2167178354Ssam } 2168178354Ssam /* 2169178354Ssam * deauth/disassoc frame format 2170178354Ssam * [2] reason 2171178354Ssam */ 2172178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 2173178354Ssam reason = le16toh(*(uint16_t *)frm); 2174178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) { 2175178354Ssam vap->iv_stats.is_rx_deauth++; 2176178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 2177178354Ssam } else { 2178178354Ssam vap->iv_stats.is_rx_disassoc++; 2179178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 2180178354Ssam } 2181178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2182178354Ssam "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >> 2183178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], reason); 2184178354Ssam if (ni != vap->iv_bss) 2185178354Ssam ieee80211_node_leave(ni); 2186178354Ssam break; 2187178354Ssam } 2188178354Ssam 2189178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 2190178354Ssam if (vap->iv_state == IEEE80211_S_RUN) { 2191178354Ssam if (ieee80211_parse_action(ni, m0) == 0) 2192178354Ssam ic->ic_recv_action(ni, frm, efrm); 2193178354Ssam } else 2194178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2195178354Ssam break; 2196178354Ssam 2197178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2198178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2199178354Ssam default: 2200178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2201178354Ssam wh, "mgt", "subtype 0x%x not handled", subtype); 2202178354Ssam vap->iv_stats.is_rx_badsubtype++; 2203178354Ssam break; 2204178354Ssam } 2205178354Ssam} 2206178354Ssam 2207191546Ssamstatic void 2208191546Ssamhostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2209191546Ssam{ 2210191546Ssam switch (subtype) { 2211191546Ssam case IEEE80211_FC0_SUBTYPE_PS_POLL: 2212191546Ssam hostap_recv_pspoll(ni, m); 2213191546Ssam break; 2214191546Ssam case IEEE80211_FC0_SUBTYPE_BAR: 2215191546Ssam ieee80211_recv_bar(ni, m); 2216191546Ssam break; 2217191546Ssam } 2218191546Ssam} 2219191546Ssam 2220178354Ssam/* 2221178354Ssam * Process a received ps-poll frame. 2222178354Ssam */ 2223178354Ssamstatic void 2224178354Ssamhostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) 2225178354Ssam{ 2226178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2227178354Ssam struct ieee80211_frame_min *wh; 2228184288Ssam struct ifnet *ifp; 2229178354Ssam struct mbuf *m; 2230178354Ssam uint16_t aid; 2231178354Ssam int qlen; 2232178354Ssam 2233178354Ssam wh = mtod(m0, struct ieee80211_frame_min *); 2234178354Ssam if (ni->ni_associd == 0) { 2235178354Ssam IEEE80211_DISCARD(vap, 2236178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2237178354Ssam (struct ieee80211_frame *) wh, NULL, 2238178354Ssam "%s", "unassociated station"); 2239178354Ssam vap->iv_stats.is_ps_unassoc++; 2240178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, 2241178354Ssam IEEE80211_REASON_NOT_ASSOCED); 2242178354Ssam return; 2243178354Ssam } 2244178354Ssam 2245178354Ssam aid = le16toh(*(uint16_t *)wh->i_dur); 2246178354Ssam if (aid != ni->ni_associd) { 2247178354Ssam IEEE80211_DISCARD(vap, 2248178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2249178354Ssam (struct ieee80211_frame *) wh, NULL, 2250178354Ssam "aid mismatch: sta aid 0x%x poll aid 0x%x", 2251178354Ssam ni->ni_associd, aid); 2252178354Ssam vap->iv_stats.is_ps_badaid++; 2253180837Ssam /* 2254180837Ssam * NB: We used to deauth the station but it turns out 2255180837Ssam * the Blackberry Curve 8230 (and perhaps other devices) 2256180837Ssam * sometimes send the wrong AID when WME is negotiated. 2257180837Ssam * Being more lenient here seems ok as we already check 2258180837Ssam * the station is associated and we only return frames 2259180837Ssam * queued for the station (i.e. we don't use the AID). 2260180837Ssam */ 2261178354Ssam return; 2262178354Ssam } 2263178354Ssam 2264178354Ssam /* Okay, take the first queued packet and put it out... */ 2265184288Ssam m = ieee80211_node_psq_dequeue(ni, &qlen); 2266178354Ssam if (m == NULL) { 2267178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, 2268178354Ssam "%s", "recv ps-poll, but queue empty"); 2269178354Ssam ieee80211_send_nulldata(ieee80211_ref_node(ni)); 2270178354Ssam vap->iv_stats.is_ps_qempty++; /* XXX node stat */ 2271178354Ssam if (vap->iv_set_tim != NULL) 2272178354Ssam vap->iv_set_tim(ni, 0); /* just in case */ 2273178354Ssam return; 2274178354Ssam } 2275178354Ssam /* 2276178354Ssam * If there are more packets, set the more packets bit 2277178354Ssam * in the packet dispatched to the station; otherwise 2278178354Ssam * turn off the TIM bit. 2279178354Ssam */ 2280178354Ssam if (qlen != 0) { 2281178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2282178354Ssam "recv ps-poll, send packet, %u still queued", qlen); 2283178354Ssam m->m_flags |= M_MORE_DATA; 2284178354Ssam } else { 2285178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2286178354Ssam "%s", "recv ps-poll, send packet, queue empty"); 2287178354Ssam if (vap->iv_set_tim != NULL) 2288178354Ssam vap->iv_set_tim(ni, 0); 2289178354Ssam } 2290178354Ssam m->m_flags |= M_PWR_SAV; /* bypass PS handling */ 2291184288Ssam 2292184288Ssam if (m->m_flags & M_ENCAP) 2293184288Ssam ifp = vap->iv_ic->ic_ifp; 2294184288Ssam else 2295184288Ssam ifp = vap->iv_ifp; 2296178354Ssam IF_ENQUEUE(&ifp->if_snd, m); 2297178354Ssam if_start(ifp); 2298178354Ssam} 2299