ieee80211_hostap.c revision 289164
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 289164 2015-10-12 04:30:38Z adrian $"); 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> 51257176Sglebius#include <net/if_var.h> 52178354Ssam#include <net/if_media.h> 53178354Ssam#include <net/if_llc.h> 54178354Ssam#include <net/ethernet.h> 55178354Ssam 56178354Ssam#include <net/bpf.h> 57178354Ssam 58178354Ssam#include <net80211/ieee80211_var.h> 59178354Ssam#include <net80211/ieee80211_hostap.h> 60178354Ssam#include <net80211/ieee80211_input.h> 61190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 62190391Ssam#include <net80211/ieee80211_superg.h> 63190391Ssam#endif 64178354Ssam#include <net80211/ieee80211_wds.h> 65178354Ssam 66178354Ssam#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 67178354Ssam 68178354Ssamstatic void hostap_vattach(struct ieee80211vap *); 69178354Ssamstatic int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int); 70178354Ssamstatic int hostap_input(struct ieee80211_node *ni, struct mbuf *m, 71283535Sadrian const struct ieee80211_rx_stats *, 72192468Ssam int rssi, int nf); 73178354Ssamstatic void hostap_deliver_data(struct ieee80211vap *, 74178354Ssam struct ieee80211_node *, struct mbuf *); 75178354Ssamstatic void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *, 76283535Sadrian int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf); 77191546Ssamstatic void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 78178354Ssam 79178354Ssamvoid 80178354Ssamieee80211_hostap_attach(struct ieee80211com *ic) 81178354Ssam{ 82178354Ssam ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach; 83178354Ssam} 84178354Ssam 85178354Ssamvoid 86178354Ssamieee80211_hostap_detach(struct ieee80211com *ic) 87178354Ssam{ 88178354Ssam} 89178354Ssam 90178354Ssamstatic void 91178354Ssamhostap_vdetach(struct ieee80211vap *vap) 92178354Ssam{ 93178354Ssam} 94178354Ssam 95178354Ssamstatic void 96178354Ssamhostap_vattach(struct ieee80211vap *vap) 97178354Ssam{ 98178354Ssam vap->iv_newstate = hostap_newstate; 99178354Ssam vap->iv_input = hostap_input; 100178354Ssam vap->iv_recv_mgmt = hostap_recv_mgmt; 101191546Ssam vap->iv_recv_ctl = hostap_recv_ctl; 102178354Ssam vap->iv_opdetach = hostap_vdetach; 103178354Ssam vap->iv_deliver_data = hostap_deliver_data; 104241138Sadrian vap->iv_recv_pspoll = ieee80211_recv_pspoll; 105178354Ssam} 106178354Ssam 107178354Ssamstatic void 108178354Ssamsta_disassoc(void *arg, struct ieee80211_node *ni) 109178354Ssam{ 110178354Ssam struct ieee80211vap *vap = arg; 111178354Ssam 112178354Ssam if (ni->ni_vap == vap && ni->ni_associd != 0) { 113178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, 114178354Ssam IEEE80211_REASON_ASSOC_LEAVE); 115178354Ssam ieee80211_node_leave(ni); 116178354Ssam } 117178354Ssam} 118178354Ssam 119193413Ssamstatic void 120193413Ssamsta_csa(void *arg, struct ieee80211_node *ni) 121193413Ssam{ 122193413Ssam struct ieee80211vap *vap = arg; 123193413Ssam 124193413Ssam if (ni->ni_vap == vap && ni->ni_associd != 0) 125193413Ssam if (ni->ni_inact > vap->iv_inact_init) { 126193413Ssam ni->ni_inact = vap->iv_inact_init; 127193413Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 128193413Ssam "%s: inact %u", __func__, ni->ni_inact); 129193413Ssam } 130193413Ssam} 131193413Ssam 132193414Ssamstatic void 133193414Ssamsta_drop(void *arg, struct ieee80211_node *ni) 134193414Ssam{ 135193414Ssam struct ieee80211vap *vap = arg; 136193414Ssam 137193414Ssam if (ni->ni_vap == vap && ni->ni_associd != 0) 138193414Ssam ieee80211_node_leave(ni); 139193414Ssam} 140193414Ssam 141178354Ssam/* 142193414Ssam * Does a channel change require associated stations to re-associate 143193414Ssam * so protocol state is correct. This is used when doing CSA across 144193414Ssam * bands or similar (e.g. HT -> legacy). 145193414Ssam */ 146193414Ssamstatic int 147193414Ssamisbandchange(struct ieee80211com *ic) 148193414Ssam{ 149193414Ssam return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) & 150193414Ssam (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF | 151193414Ssam IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0; 152193414Ssam} 153193414Ssam 154193414Ssam/* 155178354Ssam * IEEE80211_M_HOSTAP vap state machine handler. 156178354Ssam */ 157178354Ssamstatic int 158178354Ssamhostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 159178354Ssam{ 160178354Ssam struct ieee80211com *ic = vap->iv_ic; 161178354Ssam enum ieee80211_state ostate; 162178354Ssam 163178354Ssam IEEE80211_LOCK_ASSERT(ic); 164178354Ssam 165178354Ssam ostate = vap->iv_state; 166178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 167178354Ssam __func__, ieee80211_state_name[ostate], 168178354Ssam ieee80211_state_name[nstate], arg); 169178354Ssam vap->iv_state = nstate; /* state transition */ 170178354Ssam if (ostate != IEEE80211_S_SCAN) 171178354Ssam ieee80211_cancel_scan(vap); /* background scan */ 172178354Ssam switch (nstate) { 173178354Ssam case IEEE80211_S_INIT: 174178354Ssam switch (ostate) { 175178354Ssam case IEEE80211_S_SCAN: 176178354Ssam ieee80211_cancel_scan(vap); 177178354Ssam break; 178178354Ssam case IEEE80211_S_CAC: 179178354Ssam ieee80211_dfs_cac_stop(vap); 180178354Ssam break; 181178354Ssam case IEEE80211_S_RUN: 182178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 183178354Ssam break; 184178354Ssam default: 185178354Ssam break; 186178354Ssam } 187178354Ssam if (ostate != IEEE80211_S_INIT) { 188178354Ssam /* NB: optimize INIT -> INIT case */ 189178354Ssam ieee80211_reset_bss(vap); 190178354Ssam } 191178354Ssam if (vap->iv_auth->ia_detach != NULL) 192178354Ssam vap->iv_auth->ia_detach(vap); 193178354Ssam break; 194178354Ssam case IEEE80211_S_SCAN: 195178354Ssam switch (ostate) { 196178354Ssam case IEEE80211_S_CSA: 197178354Ssam case IEEE80211_S_RUN: 198178354Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 199178354Ssam /* 200178354Ssam * Clear overlapping BSS state; the beacon frame 201178354Ssam * will be reconstructed on transition to the RUN 202178354Ssam * state and the timeout routines check if the flag 203178354Ssam * is set before doing anything so this is sufficient. 204178354Ssam */ 205178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 206193655Ssam ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR; 207178354Ssam /* fall thru... */ 208178354Ssam case IEEE80211_S_CAC: 209178354Ssam /* 210178354Ssam * NB: We may get here because of a manual channel 211178354Ssam * change in which case we need to stop CAC 212178354Ssam * XXX no need to stop if ostate RUN but it's ok 213178354Ssam */ 214178354Ssam ieee80211_dfs_cac_stop(vap); 215178354Ssam /* fall thru... */ 216178354Ssam case IEEE80211_S_INIT: 217178354Ssam if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 218178354Ssam !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) { 219178354Ssam /* 220178354Ssam * Already have a channel; bypass the 221178354Ssam * scan and startup immediately. 222178354Ssam * ieee80211_create_ibss will call back to 223178354Ssam * move us to RUN state. 224178354Ssam */ 225178354Ssam ieee80211_create_ibss(vap, vap->iv_des_chan); 226178354Ssam break; 227178354Ssam } 228178354Ssam /* 229178354Ssam * Initiate a scan. We can come here as a result 230178354Ssam * of an IEEE80211_IOC_SCAN_REQ too in which case 231178354Ssam * the vap will be marked with IEEE80211_FEXT_SCANREQ 232178354Ssam * and the scan request parameters will be present 233178354Ssam * in iv_scanreq. Otherwise we do the default. 234178354Ssam */ 235178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 236178354Ssam ieee80211_check_scan(vap, 237178354Ssam vap->iv_scanreq_flags, 238178354Ssam vap->iv_scanreq_duration, 239178354Ssam vap->iv_scanreq_mindwell, 240178354Ssam vap->iv_scanreq_maxdwell, 241178354Ssam vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 242178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 243178354Ssam } else 244178354Ssam ieee80211_check_scan_current(vap); 245178354Ssam break; 246178354Ssam case IEEE80211_S_SCAN: 247178354Ssam /* 248178354Ssam * A state change requires a reset; scan. 249178354Ssam */ 250178354Ssam ieee80211_check_scan_current(vap); 251178354Ssam break; 252178354Ssam default: 253178354Ssam break; 254178354Ssam } 255178354Ssam break; 256178354Ssam case IEEE80211_S_CAC: 257178354Ssam /* 258178354Ssam * Start CAC on a DFS channel. We come here when starting 259178354Ssam * a bss on a DFS channel (see ieee80211_create_ibss). 260178354Ssam */ 261178354Ssam ieee80211_dfs_cac_start(vap); 262178354Ssam break; 263178354Ssam case IEEE80211_S_RUN: 264178354Ssam if (vap->iv_flags & IEEE80211_F_WPA) { 265178354Ssam /* XXX validate prerequisites */ 266178354Ssam } 267178354Ssam switch (ostate) { 268178354Ssam case IEEE80211_S_INIT: 269178354Ssam /* 270178354Ssam * Already have a channel; bypass the 271178354Ssam * scan and startup immediately. 272178354Ssam * Note that ieee80211_create_ibss will call 273178354Ssam * back to do a RUN->RUN state change. 274178354Ssam */ 275178354Ssam ieee80211_create_ibss(vap, 276178354Ssam ieee80211_ht_adjust_channel(ic, 277193655Ssam ic->ic_curchan, vap->iv_flags_ht)); 278178354Ssam /* NB: iv_bss is changed on return */ 279178354Ssam break; 280178354Ssam case IEEE80211_S_CAC: 281178354Ssam /* 282178354Ssam * NB: This is the normal state change when CAC 283178354Ssam * expires and no radar was detected; no need to 284178354Ssam * clear the CAC timer as it's already expired. 285178354Ssam */ 286178354Ssam /* fall thru... */ 287178354Ssam case IEEE80211_S_CSA: 288178354Ssam /* 289193413Ssam * Shorten inactivity timer of associated stations 290193413Ssam * to weed out sta's that don't follow a CSA. 291193413Ssam */ 292193413Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 293193413Ssam /* 294178354Ssam * Update bss node channel to reflect where 295178354Ssam * we landed after CSA. 296178354Ssam */ 297178354Ssam ieee80211_node_set_chan(vap->iv_bss, 298178354Ssam ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 299178354Ssam ieee80211_htchanflags(vap->iv_bss->ni_chan))); 300178354Ssam /* XXX bypass debug msgs */ 301178354Ssam break; 302178354Ssam case IEEE80211_S_SCAN: 303178354Ssam case IEEE80211_S_RUN: 304178354Ssam#ifdef IEEE80211_DEBUG 305178354Ssam if (ieee80211_msg_debug(vap)) { 306178354Ssam struct ieee80211_node *ni = vap->iv_bss; 307178354Ssam ieee80211_note(vap, 308178354Ssam "synchronized with %s ssid ", 309178354Ssam ether_sprintf(ni->ni_bssid)); 310178354Ssam ieee80211_print_essid(ni->ni_essid, 311178354Ssam ni->ni_esslen); 312178354Ssam /* XXX MCS/HT */ 313178354Ssam printf(" channel %d start %uMb\n", 314178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 315178354Ssam IEEE80211_RATE2MBS(ni->ni_txrate)); 316178354Ssam } 317178354Ssam#endif 318178354Ssam break; 319178354Ssam default: 320178354Ssam break; 321178354Ssam } 322178354Ssam /* 323178354Ssam * Start/stop the authenticator. We delay until here 324178354Ssam * to allow configuration to happen out of order. 325178354Ssam */ 326178354Ssam if (vap->iv_auth->ia_attach != NULL) { 327178354Ssam /* XXX check failure */ 328178354Ssam vap->iv_auth->ia_attach(vap); 329178354Ssam } else if (vap->iv_auth->ia_detach != NULL) { 330178354Ssam vap->iv_auth->ia_detach(vap); 331178354Ssam } 332178354Ssam ieee80211_node_authorize(vap->iv_bss); 333178354Ssam break; 334193414Ssam case IEEE80211_S_CSA: 335193414Ssam if (ostate == IEEE80211_S_RUN && isbandchange(ic)) { 336193414Ssam /* 337193414Ssam * On a ``band change'' silently drop associated 338193414Ssam * stations as they must re-associate before they 339193414Ssam * can pass traffic (as otherwise protocol state 340193414Ssam * such as capabilities and the negotiated rate 341193414Ssam * set may/will be wrong). 342193414Ssam */ 343193414Ssam ieee80211_iterate_nodes(&ic->ic_sta, sta_drop, vap); 344193414Ssam } 345193414Ssam break; 346178354Ssam default: 347178354Ssam break; 348178354Ssam } 349178354Ssam return 0; 350178354Ssam} 351178354Ssam 352178354Ssamstatic void 353178354Ssamhostap_deliver_data(struct ieee80211vap *vap, 354178354Ssam struct ieee80211_node *ni, struct mbuf *m) 355178354Ssam{ 356178354Ssam struct ether_header *eh = mtod(m, struct ether_header *); 357178354Ssam struct ifnet *ifp = vap->iv_ifp; 358178354Ssam 359193292Ssam /* clear driver/net80211 flags before passing up */ 360254523Sandre m->m_flags &= ~(M_MCAST | M_BCAST); 361254523Sandre m_clrprotoflags(m); 362193292Ssam 363178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, 364178354Ssam ("gack, opmode %d", vap->iv_opmode)); 365178354Ssam /* 366178354Ssam * Do accounting. 367178354Ssam */ 368271861Sglebius if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 369178354Ssam IEEE80211_NODE_STAT(ni, rx_data); 370178354Ssam IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); 371178354Ssam if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 372178354Ssam m->m_flags |= M_MCAST; /* XXX M_BCAST? */ 373178354Ssam IEEE80211_NODE_STAT(ni, rx_mcast); 374178354Ssam } else 375178354Ssam IEEE80211_NODE_STAT(ni, rx_ucast); 376178354Ssam 377178354Ssam /* perform as a bridge within the AP */ 378178354Ssam if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) { 379178354Ssam struct mbuf *mcopy = NULL; 380178354Ssam 381178354Ssam if (m->m_flags & M_MCAST) { 382243882Sglebius mcopy = m_dup(m, M_NOWAIT); 383178354Ssam if (mcopy == NULL) 384271861Sglebius if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 385178354Ssam else 386178354Ssam mcopy->m_flags |= M_MCAST; 387178354Ssam } else { 388178354Ssam /* 389178354Ssam * Check if the destination is associated with the 390178354Ssam * same vap and authorized to receive traffic. 391178354Ssam * Beware of traffic destined for the vap itself; 392178354Ssam * sending it will not work; just let it be delivered 393178354Ssam * normally. 394178354Ssam */ 395178354Ssam struct ieee80211_node *sta = ieee80211_find_vap_node( 396178354Ssam &vap->iv_ic->ic_sta, vap, eh->ether_dhost); 397178354Ssam if (sta != NULL) { 398178354Ssam if (ieee80211_node_is_authorized(sta)) { 399178354Ssam /* 400178354Ssam * Beware of sending to ourself; this 401178354Ssam * needs to happen via the normal 402178354Ssam * input path. 403178354Ssam */ 404178354Ssam if (sta != vap->iv_bss) { 405178354Ssam mcopy = m; 406178354Ssam m = NULL; 407178354Ssam } 408178354Ssam } else { 409178354Ssam vap->iv_stats.is_rx_unauth++; 410178354Ssam IEEE80211_NODE_STAT(sta, rx_unauth); 411178354Ssam } 412178354Ssam ieee80211_free_node(sta); 413178354Ssam } 414178354Ssam } 415178354Ssam if (mcopy != NULL) { 416178354Ssam int len, err; 417178354Ssam len = mcopy->m_pkthdr.len; 418254082Sadrian err = ieee80211_vap_xmitpkt(vap, mcopy); 419178354Ssam if (err) { 420178354Ssam /* NB: IFQ_HANDOFF reclaims mcopy */ 421178354Ssam } else { 422271861Sglebius if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 423178354Ssam } 424178354Ssam } 425178354Ssam } 426178354Ssam if (m != NULL) { 427178354Ssam /* 428178354Ssam * Mark frame as coming from vap's interface. 429178354Ssam */ 430178354Ssam m->m_pkthdr.rcvif = ifp; 431178354Ssam if (m->m_flags & M_MCAST) { 432178354Ssam /* 433178354Ssam * Spam DWDS vap's w/ multicast traffic. 434178354Ssam */ 435178354Ssam /* XXX only if dwds in use? */ 436178354Ssam ieee80211_dwds_mcast(vap, m); 437178354Ssam } 438178354Ssam if (ni->ni_vlan != 0) { 439178354Ssam /* attach vlan tag */ 440178354Ssam m->m_pkthdr.ether_vtag = ni->ni_vlan; 441178354Ssam m->m_flags |= M_VLANTAG; 442178354Ssam } 443178354Ssam ifp->if_input(ifp, m); 444178354Ssam } 445178354Ssam} 446178354Ssam 447178354Ssam/* 448178354Ssam * Decide if a received management frame should be 449178354Ssam * printed when debugging is enabled. This filters some 450178354Ssam * of the less interesting frames that come frequently 451178354Ssam * (e.g. beacons). 452178354Ssam */ 453178354Ssamstatic __inline int 454178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 455178354Ssam{ 456178354Ssam switch (subtype) { 457178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 458178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 459178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 460178354Ssam return 0; 461178354Ssam } 462178354Ssam return 1; 463178354Ssam} 464178354Ssam 465178354Ssam/* 466178354Ssam * Process a received frame. The node associated with the sender 467178354Ssam * should be supplied. If nothing was found in the node table then 468178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 469178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 470178354Ssam * during AP scanning to select a AP to associate with; it can have 471178354Ssam * any units so long as values have consistent units and higher values 472178354Ssam * mean ``better signal''. The receive timestamp is currently not used 473178354Ssam * by the 802.11 layer. 474178354Ssam */ 475178354Ssamstatic int 476283535Sadrianhostap_input(struct ieee80211_node *ni, struct mbuf *m, 477283535Sadrian const struct ieee80211_rx_stats *rxs, int rssi, int nf) 478178354Ssam{ 479178354Ssam struct ieee80211vap *vap = ni->ni_vap; 480178354Ssam struct ieee80211com *ic = ni->ni_ic; 481178354Ssam struct ifnet *ifp = vap->iv_ifp; 482178354Ssam struct ieee80211_frame *wh; 483178354Ssam struct ieee80211_key *key; 484178354Ssam struct ether_header *eh; 485203422Srpaulo int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 486178354Ssam uint8_t dir, type, subtype, qos; 487178354Ssam uint8_t *bssid; 488178354Ssam uint16_t rxseq; 489178354Ssam 490183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 491178354Ssam /* 492178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 493183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 494183247Ssam * here but were received out of order and been held on 495183247Ssam * the reorder queue. When resubmitted they are marked 496183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 497183247Ssam * the normal processing. 498178354Ssam */ 499178354Ssam wh = mtod(m, struct ieee80211_frame *); 500178354Ssam type = IEEE80211_FC0_TYPE_DATA; 501178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 502178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 503178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 504178354Ssam goto resubmit_ampdu; 505178354Ssam } 506178354Ssam 507178354Ssam KASSERT(ni != NULL, ("null node")); 508178354Ssam ni->ni_inact = ni->ni_inact_reload; 509178354Ssam 510178354Ssam type = -1; /* undefined */ 511178354Ssam 512178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 513178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 514178354Ssam ni->ni_macaddr, NULL, 515178354Ssam "too short (1): len %u", m->m_pkthdr.len); 516178354Ssam vap->iv_stats.is_rx_tooshort++; 517178354Ssam goto out; 518178354Ssam } 519178354Ssam /* 520178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 521178354Ssam * frame format but don't reference fields past outside 522178354Ssam * ieee80211_frame_min w/o first validating the data is 523178354Ssam * present. 524178354Ssam */ 525178354Ssam wh = mtod(m, struct ieee80211_frame *); 526178354Ssam 527178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 528178354Ssam IEEE80211_FC0_VERSION_0) { 529178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 530191547Ssam ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 531191547Ssam wh->i_fc[0], wh->i_fc[1]); 532178354Ssam vap->iv_stats.is_rx_badversion++; 533178354Ssam goto err; 534178354Ssam } 535178354Ssam 536178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 537178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 538178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 539178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 540178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) 541178354Ssam bssid = wh->i_addr1; 542178354Ssam else if (type == IEEE80211_FC0_TYPE_CTL) 543178354Ssam bssid = wh->i_addr1; 544178354Ssam else { 545178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 546178354Ssam IEEE80211_DISCARD_MAC(vap, 547178354Ssam IEEE80211_MSG_ANY, ni->ni_macaddr, 548178354Ssam NULL, "too short (2): len %u", 549178354Ssam m->m_pkthdr.len); 550178354Ssam vap->iv_stats.is_rx_tooshort++; 551178354Ssam goto out; 552178354Ssam } 553178354Ssam bssid = wh->i_addr3; 554178354Ssam } 555178354Ssam /* 556178354Ssam * Validate the bssid. 557178354Ssam */ 558178354Ssam if (!(type == IEEE80211_FC0_TYPE_MGT && 559178354Ssam subtype == IEEE80211_FC0_SUBTYPE_BEACON) && 560178354Ssam !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && 561178354Ssam !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { 562178354Ssam /* not interested in */ 563178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 564178354Ssam bssid, NULL, "%s", "not to bss"); 565178354Ssam vap->iv_stats.is_rx_wrongbss++; 566178354Ssam goto out; 567178354Ssam } 568178354Ssam 569178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 570192468Ssam ni->ni_noise = nf; 571282820Sadrian if (IEEE80211_HAS_SEQ(type, subtype)) { 572178354Ssam uint8_t tid = ieee80211_gettid(wh); 573178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 574178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 575178354Ssam ic->ic_wme.wme_hipri_traffic++; 576178354Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 577221418Sadrian if (! ieee80211_check_rxseq(ni, wh)) { 578178354Ssam /* duplicate, discard */ 579178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 580178354Ssam bssid, "duplicate", 581178354Ssam "seqno <%u,%u> fragno <%u,%u> tid %u", 582178354Ssam rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 583178354Ssam ni->ni_rxseqs[tid] >> 584178354Ssam IEEE80211_SEQ_SEQ_SHIFT, 585178354Ssam rxseq & IEEE80211_SEQ_FRAG_MASK, 586178354Ssam ni->ni_rxseqs[tid] & 587178354Ssam IEEE80211_SEQ_FRAG_MASK, 588178354Ssam tid); 589178354Ssam vap->iv_stats.is_rx_dup++; 590178354Ssam IEEE80211_NODE_STAT(ni, rx_dup); 591178354Ssam goto out; 592178354Ssam } 593178354Ssam ni->ni_rxseqs[tid] = rxseq; 594178354Ssam } 595178354Ssam } 596178354Ssam 597178354Ssam switch (type) { 598178354Ssam case IEEE80211_FC0_TYPE_DATA: 599178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 600178354Ssam if (m->m_len < hdrspace && 601178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 602178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 603178354Ssam ni->ni_macaddr, NULL, 604178354Ssam "data too short: expecting %u", hdrspace); 605178354Ssam vap->iv_stats.is_rx_tooshort++; 606178354Ssam goto out; /* XXX */ 607178354Ssam } 608178354Ssam if (!(dir == IEEE80211_FC1_DIR_TODS || 609178354Ssam (dir == IEEE80211_FC1_DIR_DSTODS && 610178354Ssam (vap->iv_flags & IEEE80211_F_DWDS)))) { 611178354Ssam if (dir != IEEE80211_FC1_DIR_DSTODS) { 612178354Ssam IEEE80211_DISCARD(vap, 613178354Ssam IEEE80211_MSG_INPUT, wh, "data", 614178354Ssam "incorrect dir 0x%x", dir); 615178354Ssam } else { 616178354Ssam IEEE80211_DISCARD(vap, 617178354Ssam IEEE80211_MSG_INPUT | 618178354Ssam IEEE80211_MSG_WDS, wh, 619178354Ssam "4-address data", 620178354Ssam "%s", "DWDS not enabled"); 621178354Ssam } 622178354Ssam vap->iv_stats.is_rx_wrongdir++; 623178354Ssam goto out; 624178354Ssam } 625178354Ssam /* check if source STA is associated */ 626178354Ssam if (ni == vap->iv_bss) { 627178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 628178354Ssam wh, "data", "%s", "unknown src"); 629178354Ssam ieee80211_send_error(ni, wh->i_addr2, 630178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 631178354Ssam IEEE80211_REASON_NOT_AUTHED); 632178354Ssam vap->iv_stats.is_rx_notassoc++; 633178354Ssam goto err; 634178354Ssam } 635178354Ssam if (ni->ni_associd == 0) { 636178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 637178354Ssam wh, "data", "%s", "unassoc src"); 638178354Ssam IEEE80211_SEND_MGMT(ni, 639178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 640178354Ssam IEEE80211_REASON_NOT_ASSOCED); 641178354Ssam vap->iv_stats.is_rx_notassoc++; 642178354Ssam goto err; 643178354Ssam } 644178354Ssam 645178354Ssam /* 646178354Ssam * Check for power save state change. 647178354Ssam * XXX out-of-order A-MPDU frames? 648178354Ssam */ 649178354Ssam if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^ 650178354Ssam (ni->ni_flags & IEEE80211_NODE_PWR_MGT))) 651241138Sadrian vap->iv_node_ps(ni, 652178354Ssam wh->i_fc[1] & IEEE80211_FC1_PWR_MGT); 653178354Ssam /* 654178354Ssam * For 4-address packets handle WDS discovery 655178354Ssam * notifications. Once a WDS link is setup frames 656178354Ssam * are just delivered to the WDS vap (see below). 657178354Ssam */ 658178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) { 659178354Ssam if (!ieee80211_node_is_authorized(ni)) { 660178354Ssam IEEE80211_DISCARD(vap, 661178354Ssam IEEE80211_MSG_INPUT | 662178354Ssam IEEE80211_MSG_WDS, wh, 663178354Ssam "4-address data", 664178354Ssam "%s", "unauthorized port"); 665178354Ssam vap->iv_stats.is_rx_unauth++; 666178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 667178354Ssam goto err; 668178354Ssam } 669178354Ssam ieee80211_dwds_discover(ni, m); 670178354Ssam return type; 671178354Ssam } 672178354Ssam 673178354Ssam /* 674183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 675183247Ssam * processed directly then ieee80211_ampdu_reorder 676178354Ssam * will return 0; otherwise it has consumed the mbuf 677178354Ssam * and we should do nothing more with it. 678178354Ssam */ 679183247Ssam if ((m->m_flags & M_AMPDU) && 680178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 681178354Ssam m = NULL; 682178354Ssam goto out; 683178354Ssam } 684178354Ssam resubmit_ampdu: 685178354Ssam 686178354Ssam /* 687178354Ssam * Handle privacy requirements. Note that we 688178354Ssam * must not be preempted from here until after 689178354Ssam * we (potentially) call ieee80211_crypto_demic; 690178354Ssam * otherwise we may violate assumptions in the 691178354Ssam * crypto cipher modules used to do delayed update 692178354Ssam * of replay sequence numbers. 693178354Ssam */ 694260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 695178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 696178354Ssam /* 697178354Ssam * Discard encrypted frames when privacy is off. 698178354Ssam */ 699178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 700178354Ssam wh, "WEP", "%s", "PRIVACY off"); 701178354Ssam vap->iv_stats.is_rx_noprivacy++; 702178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 703178354Ssam goto out; 704178354Ssam } 705178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 706178354Ssam if (key == NULL) { 707178354Ssam /* NB: stats+msgs handled in crypto_decap */ 708178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 709178354Ssam goto out; 710178354Ssam } 711178354Ssam wh = mtod(m, struct ieee80211_frame *); 712260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 713178354Ssam } else { 714178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 715178354Ssam key = NULL; 716178354Ssam } 717178354Ssam 718178354Ssam /* 719178354Ssam * Save QoS bits for use below--before we strip the header. 720178354Ssam */ 721178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 722178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 723178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 724178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 725178354Ssam } else 726178354Ssam qos = 0; 727178354Ssam 728178354Ssam /* 729178354Ssam * Next up, any fragmentation. 730178354Ssam */ 731178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 732178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 733178354Ssam if (m == NULL) { 734178354Ssam /* Fragment dropped or frame not complete yet */ 735178354Ssam goto out; 736178354Ssam } 737178354Ssam } 738178354Ssam wh = NULL; /* no longer valid, catch any uses */ 739178354Ssam 740178354Ssam /* 741178354Ssam * Next strip any MSDU crypto bits. 742178354Ssam */ 743178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 744178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 745178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 746178354Ssam vap->iv_stats.is_rx_demicfail++; 747178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 748178354Ssam goto out; 749178354Ssam } 750178354Ssam /* copy to listener after decrypt */ 751192468Ssam if (ieee80211_radiotap_active_vap(vap)) 752192468Ssam ieee80211_radiotap_rx(vap, m); 753178354Ssam need_tap = 0; 754178354Ssam /* 755178354Ssam * Finally, strip the 802.11 header. 756178354Ssam */ 757178354Ssam m = ieee80211_decap(vap, m, hdrspace); 758178354Ssam if (m == NULL) { 759178354Ssam /* XXX mask bit to check for both */ 760178354Ssam /* don't count Null data frames as errors */ 761178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 762178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 763178354Ssam goto out; 764178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 765178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 766178354Ssam vap->iv_stats.is_rx_decap++; 767178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 768178354Ssam goto err; 769178354Ssam } 770178354Ssam eh = mtod(m, struct ether_header *); 771178354Ssam if (!ieee80211_node_is_authorized(ni)) { 772178354Ssam /* 773178354Ssam * Deny any non-PAE frames received prior to 774178354Ssam * authorization. For open/shared-key 775178354Ssam * authentication the port is mark authorized 776178354Ssam * after authentication completes. For 802.1x 777178354Ssam * the port is not marked authorized by the 778178354Ssam * authenticator until the handshake has completed. 779178354Ssam */ 780178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 781178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 782178354Ssam eh->ether_shost, "data", 783178354Ssam "unauthorized port: ether type 0x%x len %u", 784178354Ssam eh->ether_type, m->m_pkthdr.len); 785178354Ssam vap->iv_stats.is_rx_unauth++; 786178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 787178354Ssam goto err; 788178354Ssam } 789178354Ssam } else { 790178354Ssam /* 791178354Ssam * When denying unencrypted frames, discard 792178354Ssam * any non-PAE frames received without encryption. 793178354Ssam */ 794178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 795178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 796178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 797178354Ssam /* 798178354Ssam * Drop unencrypted frames. 799178354Ssam */ 800178354Ssam vap->iv_stats.is_rx_unencrypted++; 801178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 802178354Ssam goto out; 803178354Ssam } 804178354Ssam } 805178354Ssam /* XXX require HT? */ 806178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 807178354Ssam m = ieee80211_decap_amsdu(ni, m); 808178354Ssam if (m == NULL) 809178354Ssam return IEEE80211_FC0_TYPE_DATA; 810190391Ssam } else { 811190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 812190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 813190391Ssam if (m == NULL) 814178354Ssam return IEEE80211_FC0_TYPE_DATA; 815190391Ssam#endif 816178354Ssam } 817178354Ssam if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) 818178354Ssam ieee80211_deliver_data(ni->ni_wdsvap, ni, m); 819178354Ssam else 820178354Ssam hostap_deliver_data(vap, ni, m); 821178354Ssam return IEEE80211_FC0_TYPE_DATA; 822178354Ssam 823178354Ssam case IEEE80211_FC0_TYPE_MGT: 824178354Ssam vap->iv_stats.is_rx_mgmt++; 825178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 826178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 827178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 828178354Ssam wh, "mgt", "incorrect dir 0x%x", dir); 829178354Ssam vap->iv_stats.is_rx_wrongdir++; 830178354Ssam goto err; 831178354Ssam } 832178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 833178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 834178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 835178354Ssam m->m_pkthdr.len); 836178354Ssam vap->iv_stats.is_rx_tooshort++; 837178354Ssam goto out; 838178354Ssam } 839178354Ssam if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 840178354Ssam /* ensure return frames are unicast */ 841178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 842178354Ssam wh, NULL, "source is multicast: %s", 843178354Ssam ether_sprintf(wh->i_addr2)); 844178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 845178354Ssam goto out; 846178354Ssam } 847178354Ssam#ifdef IEEE80211_DEBUG 848178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 849178354Ssam ieee80211_msg_dumppkts(vap)) { 850178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 851178354Ssam ieee80211_mgt_subtype_name[subtype >> 852178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 853178354Ssam ether_sprintf(wh->i_addr2), rssi); 854178354Ssam } 855178354Ssam#endif 856260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 857178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 858178354Ssam /* 859178354Ssam * Only shared key auth frames with a challenge 860178354Ssam * should be encrypted, discard all others. 861178354Ssam */ 862178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 863178354Ssam wh, NULL, 864178354Ssam "%s", "WEP set but not permitted"); 865178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 866178354Ssam goto out; 867178354Ssam } 868178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 869178354Ssam /* 870178354Ssam * Discard encrypted frames when privacy is off. 871178354Ssam */ 872178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 873178354Ssam wh, NULL, "%s", "WEP set but PRIVACY off"); 874178354Ssam vap->iv_stats.is_rx_noprivacy++; 875178354Ssam goto out; 876178354Ssam } 877178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 878178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 879178354Ssam if (key == NULL) { 880178354Ssam /* NB: stats+msgs handled in crypto_decap */ 881178354Ssam goto out; 882178354Ssam } 883178354Ssam wh = mtod(m, struct ieee80211_frame *); 884260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 885178354Ssam } 886205791Srpaulo /* 887205791Srpaulo * Pass the packet to radiotap before calling iv_recv_mgmt(). 888205791Srpaulo * Otherwise iv_recv_mgmt() might pass another packet to 889205791Srpaulo * radiotap, resulting in out of order packet captures. 890205791Srpaulo */ 891205516Srpaulo if (ieee80211_radiotap_active_vap(vap)) 892205516Srpaulo ieee80211_radiotap_rx(vap, m); 893205516Srpaulo need_tap = 0; 894283535Sadrian vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 895191534Ssam goto out; 896178354Ssam 897178354Ssam case IEEE80211_FC0_TYPE_CTL: 898178354Ssam vap->iv_stats.is_rx_ctl++; 899178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 900191546Ssam vap->iv_recv_ctl(ni, m, subtype); 901178354Ssam goto out; 902178354Ssam default: 903178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 904178354Ssam wh, "bad", "frame type 0x%x", type); 905178354Ssam /* should not come here */ 906178354Ssam break; 907178354Ssam } 908178354Ssamerr: 909271861Sglebius if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 910178354Ssamout: 911178354Ssam if (m != NULL) { 912192765Ssam if (need_tap && ieee80211_radiotap_active_vap(vap)) 913192468Ssam ieee80211_radiotap_rx(vap, m); 914178354Ssam m_freem(m); 915178354Ssam } 916178354Ssam return type; 917178354Ssam} 918178354Ssam 919178354Ssamstatic void 920178354Ssamhostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 921192468Ssam int rssi, int nf, uint16_t seq, uint16_t status) 922178354Ssam{ 923178354Ssam struct ieee80211vap *vap = ni->ni_vap; 924178354Ssam 925178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 926178354Ssam 927178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 928178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 929178354Ssam ni->ni_macaddr, "open auth", 930178354Ssam "bad sta auth mode %u", ni->ni_authmode); 931178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 932178354Ssam /* 933178354Ssam * Clear any challenge text that may be there if 934178354Ssam * a previous shared key auth failed and then an 935178354Ssam * open auth is attempted. 936178354Ssam */ 937178354Ssam if (ni->ni_challenge != NULL) { 938283538Sadrian IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 939178354Ssam ni->ni_challenge = NULL; 940178354Ssam } 941178354Ssam /* XXX hack to workaround calling convention */ 942178354Ssam ieee80211_send_error(ni, wh->i_addr2, 943178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 944178354Ssam (seq + 1) | (IEEE80211_STATUS_ALG<<16)); 945178354Ssam return; 946178354Ssam } 947178354Ssam if (seq != IEEE80211_AUTH_OPEN_REQUEST) { 948178354Ssam vap->iv_stats.is_rx_bad_auth++; 949178354Ssam return; 950178354Ssam } 951178354Ssam /* always accept open authentication requests */ 952178354Ssam if (ni == vap->iv_bss) { 953178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 954178354Ssam if (ni == NULL) 955178354Ssam return; 956178354Ssam } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 957178354Ssam (void) ieee80211_ref_node(ni); 958178354Ssam /* 959178354Ssam * Mark the node as referenced to reflect that it's 960178354Ssam * reference count has been bumped to insure it remains 961178354Ssam * after the transaction completes. 962178354Ssam */ 963178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 964186099Ssam /* 965186151Ssam * Mark the node as requiring a valid association id 966186099Ssam * before outbound traffic is permitted. 967186099Ssam */ 968186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 969178354Ssam 970178354Ssam if (vap->iv_acl != NULL && 971178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 972178354Ssam /* 973178354Ssam * When the ACL policy is set to RADIUS we defer the 974178354Ssam * authorization to a user agent. Dispatch an event, 975178354Ssam * a subsequent MLME call will decide the fate of the 976178354Ssam * station. If the user agent is not present then the 977178354Ssam * node will be reclaimed due to inactivity. 978178354Ssam */ 979178354Ssam IEEE80211_NOTE_MAC(vap, 980178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, 981178354Ssam "%s", "station authentication defered (radius acl)"); 982178354Ssam ieee80211_notify_node_auth(ni); 983178354Ssam } else { 984178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 985178354Ssam IEEE80211_NOTE_MAC(vap, 986178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr, 987178354Ssam "%s", "station authenticated (open)"); 988178354Ssam /* 989178354Ssam * When 802.1x is not in use mark the port 990178354Ssam * authorized at this point so traffic can flow. 991178354Ssam */ 992178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 993178354Ssam ieee80211_node_authorize(ni); 994178354Ssam } 995178354Ssam} 996178354Ssam 997178354Ssamstatic void 998178354Ssamhostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 999192468Ssam uint8_t *frm, uint8_t *efrm, int rssi, int nf, 1000178354Ssam uint16_t seq, uint16_t status) 1001178354Ssam{ 1002178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1003178354Ssam uint8_t *challenge; 1004178354Ssam int allocbs, estatus; 1005178354Ssam 1006178354Ssam KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 1007178354Ssam 1008178354Ssam /* 1009178354Ssam * NB: this can happen as we allow pre-shared key 1010178354Ssam * authentication to be enabled w/o wep being turned 1011178354Ssam * on so that configuration of these can be done 1012178354Ssam * in any order. It may be better to enforce the 1013178354Ssam * ordering in which case this check would just be 1014178354Ssam * for sanity/consistency. 1015178354Ssam */ 1016178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 1017178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1018178354Ssam ni->ni_macaddr, "shared key auth", 1019178354Ssam "%s", " PRIVACY is disabled"); 1020178354Ssam estatus = IEEE80211_STATUS_ALG; 1021178354Ssam goto bad; 1022178354Ssam } 1023178354Ssam /* 1024178354Ssam * Pre-shared key authentication is evil; accept 1025178354Ssam * it only if explicitly configured (it is supported 1026178354Ssam * mainly for compatibility with clients like Mac OS X). 1027178354Ssam */ 1028178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1029178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1030178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1031178354Ssam ni->ni_macaddr, "shared key auth", 1032178354Ssam "bad sta auth mode %u", ni->ni_authmode); 1033178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1034178354Ssam estatus = IEEE80211_STATUS_ALG; 1035178354Ssam goto bad; 1036178354Ssam } 1037178354Ssam 1038178354Ssam challenge = NULL; 1039178354Ssam if (frm + 1 < efrm) { 1040178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 1041178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1042178354Ssam ni->ni_macaddr, "shared key auth", 1043178354Ssam "ie %d/%d too long", 1044178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 1045178354Ssam vap->iv_stats.is_rx_bad_auth++; 1046178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1047178354Ssam goto bad; 1048178354Ssam } 1049178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1050178354Ssam challenge = frm; 1051178354Ssam frm += frm[1] + 2; 1052178354Ssam } 1053178354Ssam switch (seq) { 1054178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1055178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1056178354Ssam if (challenge == NULL) { 1057178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1058178354Ssam ni->ni_macaddr, "shared key auth", 1059178354Ssam "%s", "no challenge"); 1060178354Ssam vap->iv_stats.is_rx_bad_auth++; 1061178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1062178354Ssam goto bad; 1063178354Ssam } 1064178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1065178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1066178354Ssam ni->ni_macaddr, "shared key auth", 1067178354Ssam "bad challenge len %d", challenge[1]); 1068178354Ssam vap->iv_stats.is_rx_bad_auth++; 1069178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1070178354Ssam goto bad; 1071178354Ssam } 1072178354Ssam default: 1073178354Ssam break; 1074178354Ssam } 1075178354Ssam switch (seq) { 1076178354Ssam case IEEE80211_AUTH_SHARED_REQUEST: 1077178354Ssam if (ni == vap->iv_bss) { 1078178354Ssam ni = ieee80211_dup_bss(vap, wh->i_addr2); 1079178354Ssam if (ni == NULL) { 1080178354Ssam /* NB: no way to return an error */ 1081178354Ssam return; 1082178354Ssam } 1083178354Ssam allocbs = 1; 1084178354Ssam } else { 1085178354Ssam if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1086178354Ssam (void) ieee80211_ref_node(ni); 1087178354Ssam allocbs = 0; 1088178354Ssam } 1089178354Ssam /* 1090178354Ssam * Mark the node as referenced to reflect that it's 1091178354Ssam * reference count has been bumped to insure it remains 1092178354Ssam * after the transaction completes. 1093178354Ssam */ 1094178354Ssam ni->ni_flags |= IEEE80211_NODE_AREF; 1095186099Ssam /* 1096186099Ssam * Mark the node as requiring a valid associatio id 1097186099Ssam * before outbound traffic is permitted. 1098186099Ssam */ 1099186099Ssam ni->ni_flags |= IEEE80211_NODE_ASSOCID; 1100178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1101192468Ssam ni->ni_noise = nf; 1102178354Ssam if (!ieee80211_alloc_challenge(ni)) { 1103178354Ssam /* NB: don't return error so they rexmit */ 1104178354Ssam return; 1105178354Ssam } 1106178354Ssam get_random_bytes(ni->ni_challenge, 1107178354Ssam IEEE80211_CHALLENGE_LEN); 1108178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1109178354Ssam ni, "shared key %sauth request", allocbs ? "" : "re"); 1110178354Ssam /* 1111178354Ssam * When the ACL policy is set to RADIUS we defer the 1112178354Ssam * authorization to a user agent. Dispatch an event, 1113178354Ssam * a subsequent MLME call will decide the fate of the 1114178354Ssam * station. If the user agent is not present then the 1115178354Ssam * node will be reclaimed due to inactivity. 1116178354Ssam */ 1117178354Ssam if (vap->iv_acl != NULL && 1118178354Ssam vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 1119178354Ssam IEEE80211_NOTE_MAC(vap, 1120178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, 1121178354Ssam ni->ni_macaddr, 1122178354Ssam "%s", "station authentication defered (radius acl)"); 1123178354Ssam ieee80211_notify_node_auth(ni); 1124178354Ssam return; 1125178354Ssam } 1126178354Ssam break; 1127178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1128178354Ssam if (ni == vap->iv_bss) { 1129178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1130178354Ssam ni->ni_macaddr, "shared key response", 1131178354Ssam "%s", "unknown station"); 1132178354Ssam /* NB: don't send a response */ 1133178354Ssam return; 1134178354Ssam } 1135178354Ssam if (ni->ni_challenge == NULL) { 1136178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1137178354Ssam ni->ni_macaddr, "shared key response", 1138178354Ssam "%s", "no challenge recorded"); 1139178354Ssam vap->iv_stats.is_rx_bad_auth++; 1140178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1141178354Ssam goto bad; 1142178354Ssam } 1143178354Ssam if (memcmp(ni->ni_challenge, &challenge[2], 1144178354Ssam challenge[1]) != 0) { 1145178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1146178354Ssam ni->ni_macaddr, "shared key response", 1147178354Ssam "%s", "challenge mismatch"); 1148178354Ssam vap->iv_stats.is_rx_auth_fail++; 1149178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1150178354Ssam goto bad; 1151178354Ssam } 1152178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1153178354Ssam ni, "%s", "station authenticated (shared key)"); 1154178354Ssam ieee80211_node_authorize(ni); 1155178354Ssam break; 1156178354Ssam default: 1157178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1158178354Ssam ni->ni_macaddr, "shared key auth", 1159178354Ssam "bad seq %d", seq); 1160178354Ssam vap->iv_stats.is_rx_bad_auth++; 1161178354Ssam estatus = IEEE80211_STATUS_SEQUENCE; 1162178354Ssam goto bad; 1163178354Ssam } 1164178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1165178354Ssam return; 1166178354Ssambad: 1167178354Ssam /* 1168178354Ssam * Send an error response; but only when operating as an AP. 1169178354Ssam */ 1170178354Ssam /* XXX hack to workaround calling convention */ 1171178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1172178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1173178354Ssam (seq + 1) | (estatus<<16)); 1174178354Ssam} 1175178354Ssam 1176178354Ssam/* 1177178354Ssam * Convert a WPA cipher selector OUI to an internal 1178178354Ssam * cipher algorithm. Where appropriate we also 1179178354Ssam * record any key length. 1180178354Ssam */ 1181178354Ssamstatic int 1182178354Ssamwpa_cipher(const uint8_t *sel, uint8_t *keylen) 1183178354Ssam{ 1184178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1185178354Ssam uint32_t w = LE_READ_4(sel); 1186178354Ssam 1187178354Ssam switch (w) { 1188178354Ssam case WPA_SEL(WPA_CSE_NULL): 1189178354Ssam return IEEE80211_CIPHER_NONE; 1190178354Ssam case WPA_SEL(WPA_CSE_WEP40): 1191178354Ssam if (keylen) 1192178354Ssam *keylen = 40 / NBBY; 1193178354Ssam return IEEE80211_CIPHER_WEP; 1194178354Ssam case WPA_SEL(WPA_CSE_WEP104): 1195178354Ssam if (keylen) 1196178354Ssam *keylen = 104 / NBBY; 1197178354Ssam return IEEE80211_CIPHER_WEP; 1198178354Ssam case WPA_SEL(WPA_CSE_TKIP): 1199178354Ssam return IEEE80211_CIPHER_TKIP; 1200178354Ssam case WPA_SEL(WPA_CSE_CCMP): 1201178354Ssam return IEEE80211_CIPHER_AES_CCM; 1202178354Ssam } 1203178354Ssam return 32; /* NB: so 1<< is discarded */ 1204178354Ssam#undef WPA_SEL 1205178354Ssam} 1206178354Ssam 1207178354Ssam/* 1208178354Ssam * Convert a WPA key management/authentication algorithm 1209178354Ssam * to an internal code. 1210178354Ssam */ 1211178354Ssamstatic int 1212178354Ssamwpa_keymgmt(const uint8_t *sel) 1213178354Ssam{ 1214178354Ssam#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1215178354Ssam uint32_t w = LE_READ_4(sel); 1216178354Ssam 1217178354Ssam switch (w) { 1218178354Ssam case WPA_SEL(WPA_ASE_8021X_UNSPEC): 1219178354Ssam return WPA_ASE_8021X_UNSPEC; 1220178354Ssam case WPA_SEL(WPA_ASE_8021X_PSK): 1221178354Ssam return WPA_ASE_8021X_PSK; 1222178354Ssam case WPA_SEL(WPA_ASE_NONE): 1223178354Ssam return WPA_ASE_NONE; 1224178354Ssam } 1225178354Ssam return 0; /* NB: so is discarded */ 1226178354Ssam#undef WPA_SEL 1227178354Ssam} 1228178354Ssam 1229178354Ssam/* 1230178354Ssam * Parse a WPA information element to collect parameters. 1231178354Ssam * Note that we do not validate security parameters; that 1232178354Ssam * is handled by the authenticator; the parsing done here 1233178354Ssam * is just for internal use in making operational decisions. 1234178354Ssam */ 1235178354Ssamstatic int 1236178354Ssamieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm, 1237178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1238178354Ssam{ 1239178354Ssam uint8_t len = frm[1]; 1240178354Ssam uint32_t w; 1241178354Ssam int n; 1242178354Ssam 1243178354Ssam /* 1244178354Ssam * Check the length once for fixed parts: OUI, type, 1245178354Ssam * version, mcast cipher, and 2 selector counts. 1246178354Ssam * Other, variable-length data, must be checked separately. 1247178354Ssam */ 1248178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) { 1249178354Ssam IEEE80211_DISCARD_IE(vap, 1250178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1251178354Ssam wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags); 1252178354Ssam return IEEE80211_REASON_IE_INVALID; 1253178354Ssam } 1254178354Ssam if (len < 14) { 1255178354Ssam IEEE80211_DISCARD_IE(vap, 1256178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1257178354Ssam wh, "WPA", "too short, len %u", len); 1258178354Ssam return IEEE80211_REASON_IE_INVALID; 1259178354Ssam } 1260178354Ssam frm += 6, len -= 4; /* NB: len is payload only */ 1261200242Srpaulo /* NB: iswpaoui already validated the OUI and type */ 1262178354Ssam w = LE_READ_2(frm); 1263178354Ssam if (w != WPA_VERSION) { 1264178354Ssam IEEE80211_DISCARD_IE(vap, 1265178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1266178354Ssam wh, "WPA", "bad version %u", w); 1267178354Ssam return IEEE80211_REASON_IE_INVALID; 1268178354Ssam } 1269178354Ssam frm += 2, len -= 2; 1270178354Ssam 1271178354Ssam memset(rsn, 0, sizeof(*rsn)); 1272178354Ssam 1273178354Ssam /* multicast/group cipher */ 1274178354Ssam rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen); 1275178354Ssam frm += 4, len -= 4; 1276178354Ssam 1277178354Ssam /* unicast ciphers */ 1278178354Ssam n = LE_READ_2(frm); 1279178354Ssam frm += 2, len -= 2; 1280178354Ssam if (len < n*4+2) { 1281178354Ssam IEEE80211_DISCARD_IE(vap, 1282178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1283178354Ssam wh, "WPA", "ucast cipher data too short; len %u, n %u", 1284178354Ssam len, n); 1285178354Ssam return IEEE80211_REASON_IE_INVALID; 1286178354Ssam } 1287178354Ssam w = 0; 1288178354Ssam for (; n > 0; n--) { 1289178354Ssam w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen); 1290178354Ssam frm += 4, len -= 4; 1291178354Ssam } 1292178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1293178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1294178354Ssam else 1295178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1296178354Ssam 1297178354Ssam /* key management algorithms */ 1298178354Ssam n = LE_READ_2(frm); 1299178354Ssam frm += 2, len -= 2; 1300178354Ssam if (len < n*4) { 1301178354Ssam IEEE80211_DISCARD_IE(vap, 1302178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1303178354Ssam wh, "WPA", "key mgmt alg data too short; len %u, n %u", 1304178354Ssam len, n); 1305178354Ssam return IEEE80211_REASON_IE_INVALID; 1306178354Ssam } 1307178354Ssam w = 0; 1308178354Ssam for (; n > 0; n--) { 1309178354Ssam w |= wpa_keymgmt(frm); 1310178354Ssam frm += 4, len -= 4; 1311178354Ssam } 1312178354Ssam if (w & WPA_ASE_8021X_UNSPEC) 1313178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC; 1314178354Ssam else 1315178354Ssam rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 1316178354Ssam 1317178354Ssam if (len > 2) /* optional capabilities */ 1318178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1319178354Ssam 1320178354Ssam return 0; 1321178354Ssam} 1322178354Ssam 1323178354Ssam/* 1324178354Ssam * Convert an RSN cipher selector OUI to an internal 1325178354Ssam * cipher algorithm. Where appropriate we also 1326178354Ssam * record any key length. 1327178354Ssam */ 1328178354Ssamstatic int 1329178354Ssamrsn_cipher(const uint8_t *sel, uint8_t *keylen) 1330178354Ssam{ 1331178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1332178354Ssam uint32_t w = LE_READ_4(sel); 1333178354Ssam 1334178354Ssam switch (w) { 1335178354Ssam case RSN_SEL(RSN_CSE_NULL): 1336178354Ssam return IEEE80211_CIPHER_NONE; 1337178354Ssam case RSN_SEL(RSN_CSE_WEP40): 1338178354Ssam if (keylen) 1339178354Ssam *keylen = 40 / NBBY; 1340178354Ssam return IEEE80211_CIPHER_WEP; 1341178354Ssam case RSN_SEL(RSN_CSE_WEP104): 1342178354Ssam if (keylen) 1343178354Ssam *keylen = 104 / NBBY; 1344178354Ssam return IEEE80211_CIPHER_WEP; 1345178354Ssam case RSN_SEL(RSN_CSE_TKIP): 1346178354Ssam return IEEE80211_CIPHER_TKIP; 1347178354Ssam case RSN_SEL(RSN_CSE_CCMP): 1348178354Ssam return IEEE80211_CIPHER_AES_CCM; 1349178354Ssam case RSN_SEL(RSN_CSE_WRAP): 1350178354Ssam return IEEE80211_CIPHER_AES_OCB; 1351178354Ssam } 1352178354Ssam return 32; /* NB: so 1<< is discarded */ 1353178354Ssam#undef WPA_SEL 1354178354Ssam} 1355178354Ssam 1356178354Ssam/* 1357178354Ssam * Convert an RSN key management/authentication algorithm 1358178354Ssam * to an internal code. 1359178354Ssam */ 1360178354Ssamstatic int 1361178354Ssamrsn_keymgmt(const uint8_t *sel) 1362178354Ssam{ 1363178354Ssam#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1364178354Ssam uint32_t w = LE_READ_4(sel); 1365178354Ssam 1366178354Ssam switch (w) { 1367178354Ssam case RSN_SEL(RSN_ASE_8021X_UNSPEC): 1368178354Ssam return RSN_ASE_8021X_UNSPEC; 1369178354Ssam case RSN_SEL(RSN_ASE_8021X_PSK): 1370178354Ssam return RSN_ASE_8021X_PSK; 1371178354Ssam case RSN_SEL(RSN_ASE_NONE): 1372178354Ssam return RSN_ASE_NONE; 1373178354Ssam } 1374178354Ssam return 0; /* NB: so is discarded */ 1375178354Ssam#undef RSN_SEL 1376178354Ssam} 1377178354Ssam 1378178354Ssam/* 1379178354Ssam * Parse a WPA/RSN information element to collect parameters 1380178354Ssam * and validate the parameters against what has been 1381178354Ssam * configured for the system. 1382178354Ssam */ 1383178354Ssamstatic int 1384178354Ssamieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm, 1385178354Ssam struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1386178354Ssam{ 1387178354Ssam uint8_t len = frm[1]; 1388178354Ssam uint32_t w; 1389178354Ssam int n; 1390178354Ssam 1391178354Ssam /* 1392178354Ssam * Check the length once for fixed parts: 1393178354Ssam * version, mcast cipher, and 2 selector counts. 1394178354Ssam * Other, variable-length data, must be checked separately. 1395178354Ssam */ 1396178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) { 1397178354Ssam IEEE80211_DISCARD_IE(vap, 1398178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1399178354Ssam wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags); 1400178354Ssam return IEEE80211_REASON_IE_INVALID; 1401178354Ssam } 1402178354Ssam if (len < 10) { 1403178354Ssam IEEE80211_DISCARD_IE(vap, 1404178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1405178354Ssam wh, "RSN", "too short, len %u", len); 1406178354Ssam return IEEE80211_REASON_IE_INVALID; 1407178354Ssam } 1408178354Ssam frm += 2; 1409178354Ssam w = LE_READ_2(frm); 1410178354Ssam if (w != RSN_VERSION) { 1411178354Ssam IEEE80211_DISCARD_IE(vap, 1412178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1413178354Ssam wh, "RSN", "bad version %u", w); 1414178354Ssam return IEEE80211_REASON_IE_INVALID; 1415178354Ssam } 1416178354Ssam frm += 2, len -= 2; 1417178354Ssam 1418178354Ssam memset(rsn, 0, sizeof(*rsn)); 1419178354Ssam 1420178354Ssam /* multicast/group cipher */ 1421178354Ssam rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen); 1422178354Ssam frm += 4, len -= 4; 1423178354Ssam 1424178354Ssam /* unicast ciphers */ 1425178354Ssam n = LE_READ_2(frm); 1426178354Ssam frm += 2, len -= 2; 1427178354Ssam if (len < n*4+2) { 1428178354Ssam IEEE80211_DISCARD_IE(vap, 1429178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1430178354Ssam wh, "RSN", "ucast cipher data too short; len %u, n %u", 1431178354Ssam len, n); 1432178354Ssam return IEEE80211_REASON_IE_INVALID; 1433178354Ssam } 1434178354Ssam w = 0; 1435178354Ssam for (; n > 0; n--) { 1436178354Ssam w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen); 1437178354Ssam frm += 4, len -= 4; 1438178354Ssam } 1439178354Ssam if (w & (1<<IEEE80211_CIPHER_TKIP)) 1440178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1441178354Ssam else 1442178354Ssam rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1443178354Ssam 1444178354Ssam /* key management algorithms */ 1445178354Ssam n = LE_READ_2(frm); 1446178354Ssam frm += 2, len -= 2; 1447178354Ssam if (len < n*4) { 1448178354Ssam IEEE80211_DISCARD_IE(vap, 1449178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1450178354Ssam wh, "RSN", "key mgmt alg data too short; len %u, n %u", 1451178354Ssam len, n); 1452178354Ssam return IEEE80211_REASON_IE_INVALID; 1453178354Ssam } 1454178354Ssam w = 0; 1455178354Ssam for (; n > 0; n--) { 1456178354Ssam w |= rsn_keymgmt(frm); 1457178354Ssam frm += 4, len -= 4; 1458178354Ssam } 1459178354Ssam if (w & RSN_ASE_8021X_UNSPEC) 1460178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC; 1461178354Ssam else 1462178354Ssam rsn->rsn_keymgmt = RSN_ASE_8021X_PSK; 1463178354Ssam 1464178354Ssam /* optional RSN capabilities */ 1465178354Ssam if (len > 2) 1466178354Ssam rsn->rsn_caps = LE_READ_2(frm); 1467178354Ssam /* XXXPMKID */ 1468178354Ssam 1469178354Ssam return 0; 1470178354Ssam} 1471178354Ssam 1472178354Ssam/* 1473178354Ssam * WPA/802.11i assocation request processing. 1474178354Ssam */ 1475178354Ssamstatic int 1476178354Ssamwpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms, 1477178354Ssam const struct ieee80211_frame *wh, const uint8_t *wpa, 1478178354Ssam const uint8_t *rsn, uint16_t capinfo) 1479178354Ssam{ 1480178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1481178354Ssam uint8_t reason; 1482178354Ssam int badwparsn; 1483178354Ssam 1484178354Ssam ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN); 1485178354Ssam if (wpa == NULL && rsn == NULL) { 1486178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) { 1487178354Ssam /* 1488178354Ssam * W-Fi Protected Setup (WPS) permits 1489178354Ssam * clients to associate and pass EAPOL frames 1490178354Ssam * to establish initial credentials. 1491178354Ssam */ 1492178354Ssam ni->ni_flags |= IEEE80211_NODE_WPS; 1493178354Ssam return 1; 1494178354Ssam } 1495178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) && 1496178354Ssam (capinfo & IEEE80211_CAPINFO_PRIVACY)) { 1497178354Ssam /* 1498178354Ssam * Transitional Security Network. Permits clients 1499178354Ssam * to associate and use WEP while WPA is configured. 1500178354Ssam */ 1501178354Ssam ni->ni_flags |= IEEE80211_NODE_TSN; 1502178354Ssam return 1; 1503178354Ssam } 1504178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1505178354Ssam wh, NULL, "%s", "no WPA/RSN IE in association request"); 1506178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1507178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1508178354Ssam goto bad; 1509178354Ssam } 1510178354Ssam /* assert right association security credentials */ 1511178354Ssam badwparsn = 0; /* NB: to silence compiler */ 1512178354Ssam switch (vap->iv_flags & IEEE80211_F_WPA) { 1513178354Ssam case IEEE80211_F_WPA1: 1514178354Ssam badwparsn = (wpa == NULL); 1515178354Ssam break; 1516178354Ssam case IEEE80211_F_WPA2: 1517178354Ssam badwparsn = (rsn == NULL); 1518178354Ssam break; 1519178354Ssam case IEEE80211_F_WPA1|IEEE80211_F_WPA2: 1520178354Ssam badwparsn = (wpa == NULL && rsn == NULL); 1521178354Ssam break; 1522178354Ssam } 1523178354Ssam if (badwparsn) { 1524178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1525178354Ssam wh, NULL, 1526178354Ssam "%s", "missing WPA/RSN IE in association request"); 1527178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1528178354Ssam reason = IEEE80211_REASON_IE_INVALID; 1529178354Ssam goto bad; 1530178354Ssam } 1531178354Ssam /* 1532178354Ssam * Parse WPA/RSN information element. 1533178354Ssam */ 1534178354Ssam if (wpa != NULL) 1535178354Ssam reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh); 1536178354Ssam else 1537178354Ssam reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh); 1538178354Ssam if (reason != 0) { 1539178354Ssam /* XXX distinguish WPA/RSN? */ 1540178354Ssam vap->iv_stats.is_rx_assoc_badwpaie++; 1541178354Ssam goto bad; 1542178354Ssam } 1543178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni, 1544178354Ssam "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x", 1545178354Ssam wpa != NULL ? "WPA" : "RSN", 1546178354Ssam rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen, 1547178354Ssam rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen, 1548178354Ssam rsnparms->rsn_keymgmt, rsnparms->rsn_caps); 1549178354Ssam 1550178354Ssam return 1; 1551178354Ssambad: 1552178354Ssam ieee80211_node_deauth(ni, reason); 1553178354Ssam return 0; 1554178354Ssam} 1555178354Ssam 1556178354Ssam/* XXX find a better place for definition */ 1557178354Ssamstruct l2_update_frame { 1558178354Ssam struct ether_header eh; 1559178354Ssam uint8_t dsap; 1560178354Ssam uint8_t ssap; 1561178354Ssam uint8_t control; 1562178354Ssam uint8_t xid[3]; 1563178354Ssam} __packed; 1564178354Ssam 1565178354Ssam/* 1566178354Ssam * Deliver a TGf L2UF frame on behalf of a station. 1567178354Ssam * This primes any bridge when the station is roaming 1568178354Ssam * between ap's on the same wired network. 1569178354Ssam */ 1570178354Ssamstatic void 1571178354Ssamieee80211_deliver_l2uf(struct ieee80211_node *ni) 1572178354Ssam{ 1573178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1574178354Ssam struct ifnet *ifp = vap->iv_ifp; 1575178354Ssam struct mbuf *m; 1576178354Ssam struct l2_update_frame *l2uf; 1577178354Ssam struct ether_header *eh; 1578178354Ssam 1579178354Ssam m = m_gethdr(M_NOWAIT, MT_DATA); 1580178354Ssam if (m == NULL) { 1581178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1582178354Ssam "%s", "no mbuf for l2uf frame"); 1583178354Ssam vap->iv_stats.is_rx_nobuf++; /* XXX not right */ 1584178354Ssam return; 1585178354Ssam } 1586178354Ssam l2uf = mtod(m, struct l2_update_frame *); 1587178354Ssam eh = &l2uf->eh; 1588178354Ssam /* dst: Broadcast address */ 1589178354Ssam IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr); 1590178354Ssam /* src: associated STA */ 1591178354Ssam IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr); 1592178354Ssam eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh)); 1593178354Ssam 1594178354Ssam l2uf->dsap = 0; 1595178354Ssam l2uf->ssap = 0; 1596178354Ssam l2uf->control = 0xf5; 1597178354Ssam l2uf->xid[0] = 0x81; 1598178354Ssam l2uf->xid[1] = 0x80; 1599178354Ssam l2uf->xid[2] = 0x00; 1600178354Ssam 1601178354Ssam m->m_pkthdr.len = m->m_len = sizeof(*l2uf); 1602178354Ssam hostap_deliver_data(vap, ni, m); 1603178354Ssam} 1604178354Ssam 1605178354Ssamstatic void 1606178354Ssamratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1607178354Ssam int reassoc, int resp, const char *tag, int rate) 1608178354Ssam{ 1609178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1610178354Ssam "deny %s request, %s rate set mismatch, rate/MCS %d", 1611178354Ssam reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL); 1612178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE); 1613178354Ssam ieee80211_node_leave(ni); 1614178354Ssam} 1615178354Ssam 1616178354Ssamstatic void 1617178354Ssamcapinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1618178354Ssam int reassoc, int resp, const char *tag, int capinfo) 1619178354Ssam{ 1620178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1621178354Ssam 1622178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1623178354Ssam "deny %s request, %s mismatch 0x%x", 1624178354Ssam reassoc ? "reassoc" : "assoc", tag, capinfo); 1625178354Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO); 1626178354Ssam ieee80211_node_leave(ni); 1627178354Ssam vap->iv_stats.is_rx_assoc_capmismatch++; 1628178354Ssam} 1629178354Ssam 1630178354Ssamstatic void 1631178354Ssamhtcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1632178354Ssam int reassoc, int resp) 1633178354Ssam{ 1634178354Ssam IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1635178354Ssam "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc"); 1636178354Ssam /* XXX no better code */ 1637193543Ssam IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS); 1638178354Ssam ieee80211_node_leave(ni); 1639178354Ssam} 1640178354Ssam 1641178354Ssamstatic void 1642178354Ssamauthalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1643178354Ssam int algo, int seq, int status) 1644178354Ssam{ 1645178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1646178354Ssam 1647178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1648178354Ssam wh, NULL, "unsupported alg %d", algo); 1649178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1650178354Ssam ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, 1651178354Ssam seq | (status << 16)); 1652178354Ssam} 1653178354Ssam 1654178354Ssamstatic __inline int 1655178354Ssamishtmixed(const uint8_t *ie) 1656178354Ssam{ 1657178354Ssam const struct ieee80211_ie_htinfo *ht = 1658178354Ssam (const struct ieee80211_ie_htinfo *) ie; 1659178354Ssam return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) == 1660178354Ssam IEEE80211_HTINFO_OPMODE_MIXED; 1661178354Ssam} 1662178354Ssam 1663178354Ssamstatic int 1664178354Ssamis11bclient(const uint8_t *rates, const uint8_t *xrates) 1665178354Ssam{ 1666178354Ssam static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); 1667178354Ssam int i; 1668178354Ssam 1669178354Ssam /* NB: the 11b clients we care about will not have xrates */ 1670178354Ssam if (xrates != NULL || rates == NULL) 1671178354Ssam return 0; 1672178354Ssam for (i = 0; i < rates[1]; i++) { 1673178354Ssam int r = rates[2+i] & IEEE80211_RATE_VAL; 1674178354Ssam if (r > 2*11 || ((1<<r) & brates) == 0) 1675178354Ssam return 0; 1676178354Ssam } 1677178354Ssam return 1; 1678178354Ssam} 1679178354Ssam 1680178354Ssamstatic void 1681178354Ssamhostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1682283535Sadrian int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1683178354Ssam{ 1684178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1685178354Ssam struct ieee80211com *ic = ni->ni_ic; 1686178354Ssam struct ieee80211_frame *wh; 1687178354Ssam uint8_t *frm, *efrm, *sfrm; 1688178354Ssam uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap; 1689178354Ssam int reassoc, resp; 1690178354Ssam uint8_t rate; 1691178354Ssam 1692178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1693178354Ssam frm = (uint8_t *)&wh[1]; 1694178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1695178354Ssam switch (subtype) { 1696178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1697178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1698178354Ssam struct ieee80211_scanparams scan; 1699178354Ssam /* 1700178354Ssam * We process beacon/probe response frames when scanning; 1701178354Ssam * otherwise we check beacon frames for overlapping non-ERP 1702178354Ssam * BSS in 11g and/or overlapping legacy BSS when in HT. 1703178354Ssam */ 1704178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 && 1705178354Ssam subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1706178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1707178354Ssam return; 1708178354Ssam } 1709178354Ssam /* NB: accept off-channel frames */ 1710283535Sadrian /* XXX TODO: use rxstatus to determine off-channel details */ 1711283535Sadrian if (ieee80211_parse_beacon(ni, m0, ic->ic_curchan, &scan) &~ IEEE80211_BPARSE_OFFCHAN) 1712178354Ssam return; 1713178354Ssam /* 1714178354Ssam * Count frame now that we know it's to be processed. 1715178354Ssam */ 1716178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1717178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1718178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1719178354Ssam } else 1720178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1721178354Ssam /* 1722178354Ssam * If scanning, just pass information to the scan module. 1723178354Ssam */ 1724178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1725178354Ssam if (scan.status == 0 && /* NB: on channel */ 1726178354Ssam (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) { 1727178354Ssam /* 1728178354Ssam * Actively scanning a channel marked passive; 1729178354Ssam * send a probe request now that we know there 1730178354Ssam * is 802.11 traffic present. 1731178354Ssam * 1732178354Ssam * XXX check if the beacon we recv'd gives 1733178354Ssam * us what we need and suppress the probe req 1734178354Ssam */ 1735178354Ssam ieee80211_probe_curchan(vap, 1); 1736178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1737178354Ssam } 1738282742Sadrian ieee80211_add_scan(vap, ic->ic_curchan, &scan, wh, 1739282742Sadrian subtype, rssi, nf); 1740178354Ssam return; 1741178354Ssam } 1742178354Ssam /* 1743178354Ssam * Check beacon for overlapping bss w/ non ERP stations. 1744178354Ssam * If we detect one and protection is configured but not 1745178354Ssam * enabled, enable it and start a timer that'll bring us 1746178354Ssam * out if we stop seeing the bss. 1747178354Ssam */ 1748178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1749178354Ssam scan.status == 0 && /* NB: on-channel */ 1750178354Ssam ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/ 1751178354Ssam (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) { 1752178354Ssam ic->ic_lastnonerp = ticks; 1753178354Ssam ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR; 1754178354Ssam if (ic->ic_protmode != IEEE80211_PROT_NONE && 1755178354Ssam (ic->ic_flags & IEEE80211_F_USEPROT) == 0) { 1756178354Ssam IEEE80211_NOTE_FRAME(vap, 1757178354Ssam IEEE80211_MSG_ASSOC, wh, 1758178354Ssam "non-ERP present on channel %d " 1759178354Ssam "(saw erp 0x%x from channel %d), " 1760178354Ssam "enable use of protection", 1761178354Ssam ic->ic_curchan->ic_ieee, 1762178354Ssam scan.erp, scan.chan); 1763178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1764178354Ssam ieee80211_notify_erp(ic); 1765178354Ssam } 1766178354Ssam } 1767178354Ssam /* 1768178354Ssam * Check beacon for non-HT station on HT channel 1769178354Ssam * and update HT BSS occupancy as appropriate. 1770178354Ssam */ 1771178354Ssam if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) { 1772178354Ssam if (scan.status & IEEE80211_BPARSE_OFFCHAN) { 1773178354Ssam /* 1774178354Ssam * Off control channel; only check frames 1775178354Ssam * that come in the extension channel when 1776178354Ssam * operating w/ HT40. 1777178354Ssam */ 1778178354Ssam if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) 1779178354Ssam break; 1780178354Ssam if (scan.chan != ic->ic_curchan->ic_extieee) 1781178354Ssam break; 1782178354Ssam } 1783178354Ssam if (scan.htinfo == NULL) { 1784178354Ssam ieee80211_htprot_update(ic, 1785178354Ssam IEEE80211_HTINFO_OPMODE_PROTOPT | 1786178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1787178354Ssam } else if (ishtmixed(scan.htinfo)) { 1788178354Ssam /* XXX? take NONHT_PRESENT from beacon? */ 1789178354Ssam ieee80211_htprot_update(ic, 1790178354Ssam IEEE80211_HTINFO_OPMODE_MIXED | 1791178354Ssam IEEE80211_HTINFO_NONHT_PRESENT); 1792178354Ssam } 1793178354Ssam } 1794178354Ssam break; 1795178354Ssam } 1796178354Ssam 1797178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1798178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1799178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1800178354Ssam return; 1801178354Ssam } 1802178354Ssam /* 1803228514Sadrian * Consult the ACL policy module if setup. 1804228514Sadrian */ 1805228622Sbschmidt if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1806228514Sadrian IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1807228514Sadrian wh, NULL, "%s", "disallowed by ACL"); 1808228514Sadrian vap->iv_stats.is_rx_acl++; 1809228514Sadrian return; 1810228514Sadrian } 1811228514Sadrian /* 1812178354Ssam * prreq frame format 1813178354Ssam * [tlv] ssid 1814178354Ssam * [tlv] supported rates 1815178354Ssam * [tlv] extended supported rates 1816178354Ssam */ 1817178354Ssam ssid = rates = xrates = NULL; 1818178354Ssam sfrm = frm; 1819178354Ssam while (efrm - frm > 1) { 1820178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1821178354Ssam switch (*frm) { 1822178354Ssam case IEEE80211_ELEMID_SSID: 1823178354Ssam ssid = frm; 1824178354Ssam break; 1825178354Ssam case IEEE80211_ELEMID_RATES: 1826178354Ssam rates = frm; 1827178354Ssam break; 1828178354Ssam case IEEE80211_ELEMID_XRATES: 1829178354Ssam xrates = frm; 1830178354Ssam break; 1831178354Ssam } 1832178354Ssam frm += frm[1] + 2; 1833178354Ssam } 1834178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1835178354Ssam if (xrates != NULL) 1836178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1837178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1838178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1839178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1840178354Ssam if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { 1841178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1842178354Ssam wh, NULL, 1843178354Ssam "%s", "no ssid with ssid suppression enabled"); 1844178354Ssam vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ 1845178354Ssam return; 1846178354Ssam } 1847178354Ssam 1848178354Ssam /* XXX find a better class or define it's own */ 1849178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1850178354Ssam "%s", "recv probe req"); 1851178354Ssam /* 1852178354Ssam * Some legacy 11b clients cannot hack a complete 1853178354Ssam * probe response frame. When the request includes 1854178354Ssam * only a bare-bones rate set, communicate this to 1855178354Ssam * the transmit side. 1856178354Ssam */ 1857178354Ssam ieee80211_send_proberesp(vap, wh->i_addr2, 1858178354Ssam is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); 1859178354Ssam break; 1860178354Ssam 1861178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1862178354Ssam uint16_t algo, seq, status; 1863178354Ssam 1864178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1865178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1866178354Ssam return; 1867178354Ssam } 1868178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1869178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1870178354Ssam wh, NULL, "%s", "wrong bssid"); 1871178354Ssam vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/ 1872178354Ssam return; 1873178354Ssam } 1874178354Ssam /* 1875178354Ssam * auth frame format 1876178354Ssam * [2] algorithm 1877178354Ssam * [2] sequence 1878178354Ssam * [2] status 1879178354Ssam * [tlv*] challenge 1880178354Ssam */ 1881178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1882178354Ssam algo = le16toh(*(uint16_t *)frm); 1883178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1884178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1885178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1886178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1887178354Ssam /* 1888178354Ssam * Consult the ACL policy module if setup. 1889178354Ssam */ 1890228622Sbschmidt if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1891178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1892178354Ssam wh, NULL, "%s", "disallowed by ACL"); 1893178354Ssam vap->iv_stats.is_rx_acl++; 1894178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1895178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1896178354Ssam (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16)); 1897178354Ssam return; 1898178354Ssam } 1899178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1900178354Ssam IEEE80211_DISCARD(vap, 1901178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1902178354Ssam wh, NULL, "%s", "TKIP countermeasures enabled"); 1903178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1904178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1905178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1906178354Ssam IEEE80211_REASON_MIC_FAILURE); 1907178354Ssam return; 1908178354Ssam } 1909178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1910192468Ssam hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1911192468Ssam seq, status); 1912178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1913192468Ssam hostap_auth_open(ni, wh, rssi, nf, seq, status); 1914178354Ssam else if (algo == IEEE80211_AUTH_ALG_LEAP) { 1915178354Ssam authalgreject(ni, wh, algo, 1916178354Ssam seq+1, IEEE80211_STATUS_ALG); 1917178354Ssam return; 1918178354Ssam } else { 1919178354Ssam /* 1920178354Ssam * We assume that an unknown algorithm is the result 1921178354Ssam * of a decryption failure on a shared key auth frame; 1922178354Ssam * return a status code appropriate for that instead 1923178354Ssam * of IEEE80211_STATUS_ALG. 1924178354Ssam * 1925178354Ssam * NB: a seq# of 4 is intentional; the decrypted 1926178354Ssam * frame likely has a bogus seq value. 1927178354Ssam */ 1928178354Ssam authalgreject(ni, wh, algo, 1929178354Ssam 4, IEEE80211_STATUS_CHALLENGE); 1930178354Ssam return; 1931178354Ssam } 1932178354Ssam break; 1933178354Ssam } 1934178354Ssam 1935178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1936178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { 1937178354Ssam uint16_t capinfo, lintval; 1938178354Ssam struct ieee80211_rsnparms rsnparms; 1939178354Ssam 1940178354Ssam if (vap->iv_state != IEEE80211_S_RUN) { 1941178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1942178354Ssam return; 1943178354Ssam } 1944178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1945178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1946178354Ssam wh, NULL, "%s", "wrong bssid"); 1947178354Ssam vap->iv_stats.is_rx_assoc_bss++; 1948178354Ssam return; 1949178354Ssam } 1950178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 1951178354Ssam reassoc = 1; 1952178354Ssam resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; 1953178354Ssam } else { 1954178354Ssam reassoc = 0; 1955178354Ssam resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; 1956178354Ssam } 1957178354Ssam if (ni == vap->iv_bss) { 1958178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1959178354Ssam "deny %s request, sta not authenticated", 1960178354Ssam reassoc ? "reassoc" : "assoc"); 1961178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1962178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 1963178354Ssam IEEE80211_REASON_ASSOC_NOT_AUTHED); 1964178354Ssam vap->iv_stats.is_rx_assoc_notauth++; 1965178354Ssam return; 1966178354Ssam } 1967178354Ssam 1968178354Ssam /* 1969178354Ssam * asreq frame format 1970178354Ssam * [2] capability information 1971178354Ssam * [2] listen interval 1972178354Ssam * [6*] current AP address (reassoc only) 1973178354Ssam * [tlv] ssid 1974178354Ssam * [tlv] supported rates 1975178354Ssam * [tlv] extended supported rates 1976178354Ssam * [tlv] WPA or RSN 1977178354Ssam * [tlv] HT capabilities 1978178354Ssam * [tlv] Atheros capabilities 1979178354Ssam */ 1980178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return); 1981178354Ssam capinfo = le16toh(*(uint16_t *)frm); frm += 2; 1982178354Ssam lintval = le16toh(*(uint16_t *)frm); frm += 2; 1983178354Ssam if (reassoc) 1984178354Ssam frm += 6; /* ignore current AP info */ 1985178354Ssam ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL; 1986178354Ssam sfrm = frm; 1987178354Ssam while (efrm - frm > 1) { 1988178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1989178354Ssam switch (*frm) { 1990178354Ssam case IEEE80211_ELEMID_SSID: 1991178354Ssam ssid = frm; 1992178354Ssam break; 1993178354Ssam case IEEE80211_ELEMID_RATES: 1994178354Ssam rates = frm; 1995178354Ssam break; 1996178354Ssam case IEEE80211_ELEMID_XRATES: 1997178354Ssam xrates = frm; 1998178354Ssam break; 1999178354Ssam case IEEE80211_ELEMID_RSN: 2000178354Ssam rsn = frm; 2001178354Ssam break; 2002178354Ssam case IEEE80211_ELEMID_HTCAP: 2003178354Ssam htcap = frm; 2004178354Ssam break; 2005178354Ssam case IEEE80211_ELEMID_VENDOR: 2006178354Ssam if (iswpaoui(frm)) 2007178354Ssam wpa = frm; 2008178354Ssam else if (iswmeinfo(frm)) 2009178354Ssam wme = frm; 2010190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2011178354Ssam else if (isatherosoui(frm)) 2012178354Ssam ath = frm; 2013190391Ssam#endif 2014193655Ssam else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 2015178354Ssam if (ishtcapoui(frm) && htcap == NULL) 2016178354Ssam htcap = frm; 2017178354Ssam } 2018178354Ssam break; 2019178354Ssam } 2020178354Ssam frm += frm[1] + 2; 2021178354Ssam } 2022178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2023178354Ssam if (xrates != NULL) 2024178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 2025178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 2026178354Ssam IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2027178354Ssam IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 2028178354Ssam if (htcap != NULL) { 2029178354Ssam IEEE80211_VERIFY_LENGTH(htcap[1], 2030178354Ssam htcap[0] == IEEE80211_ELEMID_VENDOR ? 2031178354Ssam 4 + sizeof(struct ieee80211_ie_htcap)-2 : 2032178354Ssam sizeof(struct ieee80211_ie_htcap)-2, 2033178354Ssam return); /* XXX just NULL out? */ 2034178354Ssam } 2035178354Ssam 2036178354Ssam if ((vap->iv_flags & IEEE80211_F_WPA) && 2037178354Ssam !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo)) 2038178354Ssam return; 2039178354Ssam /* discard challenge after association */ 2040178354Ssam if (ni->ni_challenge != NULL) { 2041283538Sadrian IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 2042178354Ssam ni->ni_challenge = NULL; 2043178354Ssam } 2044178354Ssam /* NB: 802.11 spec says to ignore station's privacy bit */ 2045178354Ssam if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) { 2046178354Ssam capinfomismatch(ni, wh, reassoc, resp, 2047178354Ssam "capability", capinfo); 2048178354Ssam return; 2049178354Ssam } 2050178354Ssam /* 2051178354Ssam * Disallow re-associate w/ invalid slot time setting. 2052178354Ssam */ 2053178354Ssam if (ni->ni_associd != 0 && 2054178354Ssam IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2055178354Ssam ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) { 2056178354Ssam capinfomismatch(ni, wh, reassoc, resp, 2057178354Ssam "slot time", capinfo); 2058178354Ssam return; 2059178354Ssam } 2060178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 2061178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 2062178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2063178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2064178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate); 2065178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2066178354Ssam return; 2067178354Ssam } 2068178354Ssam /* 2069178354Ssam * If constrained to 11g-only stations reject an 2070178354Ssam * 11b-only station. We cheat a bit here by looking 2071178354Ssam * at the max negotiated xmit rate and assuming anyone 2072178354Ssam * with a best rate <24Mb/s is an 11b station. 2073178354Ssam */ 2074178354Ssam if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) { 2075178354Ssam ratesetmismatch(ni, wh, reassoc, resp, "11g", rate); 2076178354Ssam vap->iv_stats.is_rx_assoc_norate++; 2077178354Ssam return; 2078178354Ssam } 2079178354Ssam /* 2080178354Ssam * Do HT rate set handling and setup HT node state. 2081178354Ssam */ 2082178354Ssam ni->ni_chan = vap->iv_bss->ni_chan; 2083178354Ssam if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { 2084178354Ssam rate = ieee80211_setup_htrates(ni, htcap, 2085178354Ssam IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO | 2086178354Ssam IEEE80211_F_DOBRS); 2087178354Ssam if (rate & IEEE80211_RATE_BASIC) { 2088178354Ssam ratesetmismatch(ni, wh, reassoc, resp, 2089178354Ssam "HT", rate); 2090178354Ssam vap->iv_stats.is_ht_assoc_norate++; 2091178354Ssam return; 2092178354Ssam } 2093183254Ssam ieee80211_ht_node_init(ni); 2094183254Ssam ieee80211_ht_updatehtcap(ni, htcap); 2095178354Ssam } else if (ni->ni_flags & IEEE80211_NODE_HT) 2096178354Ssam ieee80211_ht_node_cleanup(ni); 2097190579Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2098190579Ssam else if (ni->ni_ath_flags & IEEE80211_NODE_ATH) 2099190579Ssam ieee80211_ff_node_cleanup(ni); 2100190579Ssam#endif 2101178354Ssam /* 2102178354Ssam * Allow AMPDU operation only with unencrypted traffic 2103178354Ssam * or AES-CCM; the 11n spec only specifies these ciphers 2104178354Ssam * so permitting any others is undefined and can lead 2105178354Ssam * to interoperability problems. 2106178354Ssam */ 2107178354Ssam if ((ni->ni_flags & IEEE80211_NODE_HT) && 2108178354Ssam (((vap->iv_flags & IEEE80211_F_WPA) && 2109178354Ssam rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) || 2110178354Ssam (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) { 2111178354Ssam IEEE80211_NOTE(vap, 2112178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 2113178354Ssam "disallow HT use because WEP or TKIP requested, " 2114178354Ssam "capinfo 0x%x ucastcipher %d", capinfo, 2115178354Ssam rsnparms.rsn_ucastcipher); 2116178354Ssam ieee80211_ht_node_cleanup(ni); 2117178354Ssam vap->iv_stats.is_ht_assoc_downgrade++; 2118178354Ssam } 2119178354Ssam /* 2120178354Ssam * If constrained to 11n-only stations reject legacy stations. 2121178354Ssam */ 2122193655Ssam if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) && 2123178354Ssam (ni->ni_flags & IEEE80211_NODE_HT) == 0) { 2124178354Ssam htcapmismatch(ni, wh, reassoc, resp); 2125178354Ssam vap->iv_stats.is_ht_assoc_nohtcap++; 2126178354Ssam return; 2127178354Ssam } 2128178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 2129192468Ssam ni->ni_noise = nf; 2130178354Ssam ni->ni_intval = lintval; 2131178354Ssam ni->ni_capinfo = capinfo; 2132178354Ssam ni->ni_fhdwell = vap->iv_bss->ni_fhdwell; 2133178354Ssam ni->ni_fhindex = vap->iv_bss->ni_fhindex; 2134178354Ssam /* 2135178354Ssam * Store the IEs. 2136178354Ssam * XXX maybe better to just expand 2137178354Ssam */ 2138178354Ssam if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) { 2139178354Ssam#define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off) 2140178354Ssam if (wpa != NULL) 2141178354Ssam setie(wpa_ie, wpa - sfrm); 2142178354Ssam if (rsn != NULL) 2143178354Ssam setie(rsn_ie, rsn - sfrm); 2144178354Ssam if (htcap != NULL) 2145178354Ssam setie(htcap_ie, htcap - sfrm); 2146178354Ssam if (wme != NULL) { 2147178354Ssam setie(wme_ie, wme - sfrm); 2148178354Ssam /* 2149178354Ssam * Mark node as capable of QoS. 2150178354Ssam */ 2151178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 2152178354Ssam } else 2153178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2154190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 2155178354Ssam if (ath != NULL) { 2156178354Ssam setie(ath_ie, ath - sfrm); 2157178354Ssam /* 2158178354Ssam * Parse ATH station parameters. 2159178354Ssam */ 2160178354Ssam ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 2161178354Ssam } else 2162190391Ssam#endif 2163178354Ssam ni->ni_ath_flags = 0; 2164178354Ssam#undef setie 2165178354Ssam } else { 2166178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 2167178354Ssam ni->ni_ath_flags = 0; 2168178354Ssam } 2169178354Ssam ieee80211_node_join(ni, resp); 2170178354Ssam ieee80211_deliver_l2uf(ni); 2171178354Ssam break; 2172178354Ssam } 2173178354Ssam 2174178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 2175178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 2176178354Ssam uint16_t reason; 2177178354Ssam 2178178354Ssam if (vap->iv_state != IEEE80211_S_RUN || 2179178354Ssam /* NB: can happen when in promiscuous mode */ 2180178354Ssam !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 2181178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2182178354Ssam break; 2183178354Ssam } 2184178354Ssam /* 2185178354Ssam * deauth/disassoc frame format 2186178354Ssam * [2] reason 2187178354Ssam */ 2188178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 2189178354Ssam reason = le16toh(*(uint16_t *)frm); 2190178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) { 2191178354Ssam vap->iv_stats.is_rx_deauth++; 2192178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 2193178354Ssam } else { 2194178354Ssam vap->iv_stats.is_rx_disassoc++; 2195178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 2196178354Ssam } 2197178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2198178354Ssam "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >> 2199178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], reason); 2200178354Ssam if (ni != vap->iv_bss) 2201178354Ssam ieee80211_node_leave(ni); 2202178354Ssam break; 2203178354Ssam } 2204178354Ssam 2205178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 2206218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2207218958Sbschmidt if (ni == vap->iv_bss) { 2208218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2209218958Sbschmidt wh, NULL, "%s", "unknown node"); 2210218958Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 2211218958Sbschmidt } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2212218958Sbschmidt !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2213218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2214218958Sbschmidt wh, NULL, "%s", "not for us"); 2215218958Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 2216218958Sbschmidt } else if (vap->iv_state != IEEE80211_S_RUN) { 2217218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2218218927Sbschmidt wh, NULL, "wrong state %s", 2219218927Sbschmidt ieee80211_state_name[vap->iv_state]); 2220178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 2221218958Sbschmidt } else { 2222218958Sbschmidt if (ieee80211_parse_action(ni, m0) == 0) 2223218958Sbschmidt (void)ic->ic_recv_action(ni, wh, frm, efrm); 2224218927Sbschmidt } 2225178354Ssam break; 2226178354Ssam 2227178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2228178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2229218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ATIM: 2230218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2231218927Sbschmidt wh, NULL, "%s", "not handled"); 2232218927Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 2233218927Sbschmidt break; 2234218927Sbschmidt 2235178354Ssam default: 2236178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2237218927Sbschmidt wh, "mgt", "subtype 0x%x not handled", subtype); 2238178354Ssam vap->iv_stats.is_rx_badsubtype++; 2239178354Ssam break; 2240178354Ssam } 2241178354Ssam} 2242178354Ssam 2243191546Ssamstatic void 2244191546Ssamhostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2245191546Ssam{ 2246191546Ssam switch (subtype) { 2247191546Ssam case IEEE80211_FC0_SUBTYPE_PS_POLL: 2248241138Sadrian ni->ni_vap->iv_recv_pspoll(ni, m); 2249191546Ssam break; 2250191546Ssam case IEEE80211_FC0_SUBTYPE_BAR: 2251191546Ssam ieee80211_recv_bar(ni, m); 2252191546Ssam break; 2253191546Ssam } 2254191546Ssam} 2255191546Ssam 2256178354Ssam/* 2257178354Ssam * Process a received ps-poll frame. 2258178354Ssam */ 2259241138Sadrianvoid 2260241138Sadrianieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) 2261178354Ssam{ 2262178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2263248069Sadrian struct ieee80211com *ic = vap->iv_ic; 2264178354Ssam struct ieee80211_frame_min *wh; 2265178354Ssam struct mbuf *m; 2266178354Ssam uint16_t aid; 2267178354Ssam int qlen; 2268178354Ssam 2269178354Ssam wh = mtod(m0, struct ieee80211_frame_min *); 2270178354Ssam if (ni->ni_associd == 0) { 2271178354Ssam IEEE80211_DISCARD(vap, 2272178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2273178354Ssam (struct ieee80211_frame *) wh, NULL, 2274178354Ssam "%s", "unassociated station"); 2275178354Ssam vap->iv_stats.is_ps_unassoc++; 2276178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, 2277178354Ssam IEEE80211_REASON_NOT_ASSOCED); 2278178354Ssam return; 2279178354Ssam } 2280178354Ssam 2281178354Ssam aid = le16toh(*(uint16_t *)wh->i_dur); 2282178354Ssam if (aid != ni->ni_associd) { 2283178354Ssam IEEE80211_DISCARD(vap, 2284178354Ssam IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2285178354Ssam (struct ieee80211_frame *) wh, NULL, 2286178354Ssam "aid mismatch: sta aid 0x%x poll aid 0x%x", 2287178354Ssam ni->ni_associd, aid); 2288178354Ssam vap->iv_stats.is_ps_badaid++; 2289180837Ssam /* 2290180837Ssam * NB: We used to deauth the station but it turns out 2291180837Ssam * the Blackberry Curve 8230 (and perhaps other devices) 2292180837Ssam * sometimes send the wrong AID when WME is negotiated. 2293180837Ssam * Being more lenient here seems ok as we already check 2294180837Ssam * the station is associated and we only return frames 2295180837Ssam * queued for the station (i.e. we don't use the AID). 2296180837Ssam */ 2297178354Ssam return; 2298178354Ssam } 2299178354Ssam 2300178354Ssam /* Okay, take the first queued packet and put it out... */ 2301184288Ssam m = ieee80211_node_psq_dequeue(ni, &qlen); 2302178354Ssam if (m == NULL) { 2303178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, 2304178354Ssam "%s", "recv ps-poll, but queue empty"); 2305178354Ssam ieee80211_send_nulldata(ieee80211_ref_node(ni)); 2306178354Ssam vap->iv_stats.is_ps_qempty++; /* XXX node stat */ 2307178354Ssam if (vap->iv_set_tim != NULL) 2308178354Ssam vap->iv_set_tim(ni, 0); /* just in case */ 2309178354Ssam return; 2310178354Ssam } 2311178354Ssam /* 2312178354Ssam * If there are more packets, set the more packets bit 2313178354Ssam * in the packet dispatched to the station; otherwise 2314178354Ssam * turn off the TIM bit. 2315178354Ssam */ 2316178354Ssam if (qlen != 0) { 2317178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2318178354Ssam "recv ps-poll, send packet, %u still queued", qlen); 2319178354Ssam m->m_flags |= M_MORE_DATA; 2320178354Ssam } else { 2321178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2322178354Ssam "%s", "recv ps-poll, send packet, queue empty"); 2323178354Ssam if (vap->iv_set_tim != NULL) 2324178354Ssam vap->iv_set_tim(ni, 0); 2325178354Ssam } 2326178354Ssam m->m_flags |= M_PWR_SAV; /* bypass PS handling */ 2327184288Ssam 2328245098Sadrian /* 2329248069Sadrian * Do the right thing; if it's an encap'ed frame then 2330289164Sadrian * call ieee80211_parent_xmitpkt() else 2331254082Sadrian * call ieee80211_vap_xmitpkt(). 2332245098Sadrian */ 2333248069Sadrian if (m->m_flags & M_ENCAP) { 2334289164Sadrian (void) ieee80211_parent_xmitpkt(ic, m); 2335248069Sadrian } else { 2336254082Sadrian (void) ieee80211_vap_xmitpkt(vap, m); 2337245098Sadrian } 2338178354Ssam} 2339